JP2008008849A - Light source direction detector, light source position detection device, and electronic device - Google Patents

Abstract

A light source direction detector that reduces the area of a light receiving element (photodiode), a light source position detector that can detect the position of the light source by detecting the distance to the light source using two light source direction detectors, Provided is an electronic device capable of accurate and quick remote control by applying a light source direction detector or a light source position detection device.
A light source direction detector 1 includes a plurality of light receiving elements PD (first light receiving element PD1 and second light receiving element PD2) arranged on a plane separately from each other, and light signals (light signals) from a light source LED. LSa, optical signal LSb, and optical signal LSc) are provided with a lens 11 that condenses light receiving element PD. The arithmetic processing unit 13 performs arithmetic processing on the first optical signal detection value LD1 output from the first light receiving element PD1 and the second optical signal detection value LD2 output from the second light receiving element PD2, and the calculated arithmetic processing value SVout is obtained. Based on the above, the detector output SG is output.
[Selection] Figure 2

Description

  The present invention relates to a light source direction detector that detects a light source direction by detecting an optical signal from a light source of a remote control device using a plurality of light receiving elements, a light source position detection device, and an electronic apparatus to which these are applied.

  A light angle sensor for a fan is known as a light angle sensor (light source direction detector) for detecting an angular position of a light source with a conventional remote control device (remote control transmitter, so-called remote controller). This light angle sensor is attached to the electric fan body in order to detect the position (angle) of the light source of the remote controller for the electric fan and to direct the wind direction in the direction of the light source.

  FIG. 17 is a perspective side view of a schematic configuration of a conventional optical angle sensor seen from the side of the light receiving element.

  A light receiving element applied to the light angle sensor 101 is formed by adjoining a plurality of photodiodes PD102, PD103, and PD104 in one chip. In front of these photodiodes PD102, PD103, and PD104, they are indicated as light source LEDs (for example, LEDa, LEDb, LEDc, etc. depending on the position. If there is no need to distinguish these, they are simply referred to as light source LEDs. (The optical signal LSa from the light source LEDa, the optical signal LSb from the light source LEDb, and the optical signal LSc from the light source LEDc. If there is no need to distinguish between these, the optical signal LS may be used.) A lens 111 that collects light on the chip.

  For example, in the case of the optical signal LSb from the light source LEDb, the optical signal LSb of the light source LEDb is incident on the optical angle sensor 101, and the optical output current (optical signal) of the photodiode PD103 among the three photodiodes PD102, PD103, PD104. The detection value LD) is maximized. Further, when the light source LED moves to the left in the figure, the light source LEDb moves from the position of the light source LEDb to the position of the light source LEDa. When the light signal LSa from the light source LEDa enters the light angle sensor 101, the light output of the photodiode PD102 The current is maximized.

  Therefore, the light output currents of the photodiodes PD102, PD103, and PD104 are electrically compared and subjected to arithmetic processing to detect the incident angle (light source direction) of the light source LED light (see, for example, Patent Document 1). ).

  The chip size composed of the photodiodes PD102, PD103, and PD104 is defined as follows.

  That is, when the focal length f of the lens 111 is shortened as much as possible to reduce the size, for example, when f = 3 mm, it is desired to detect where the position of the light source LED in the XZ plane is within ± 45 degrees. Based on the geometric calculation, the length Lc of the photodiode PD in the X-axis direction needs to be at least 6 mm.

  FIG. 18 is an explanatory diagram for explaining an operation state of detecting a light signal from a light source by a conventional light angle sensor.

  The case where the light angle sensor 101 shown in FIG. 17 is arranged along the X-axis direction will be described as a state where the light source LED moves in the XZ plane.

  The optical signal LSa from the light source LEDa is condensed on the PD 102. Further, the optical signal LSb from the light source LEDb is condensed on the PD 103. Furthermore, the optical signal LSc from the light source LEDc is condensed on the PD 104.

  In general, in order to improve the detection accuracy of the optical signal LS in each photodiode PD102, PD103, PD104, the beam spot of the optical signal LS is made smaller than the light receiving area of each photodiode PD102, PD103, PD104. The Therefore, when the optical signal LSa is incident on the PD 102, the optical signal LS is incident only on the PD 102.

  That is, in order to detect the position of the light source LED over a wide range of angles, there is a problem that the areas of the photodiodes PD102, PD103, and PD104 must be increased in the X-axis direction, for example. As shown in FIG. 17, for example, when the focal length f of the lens 111 is 3 mm, the length of the chip needs to be 6 mm.

  In addition, the photodiode PD is formed as a semiconductor chip, and the cost of the semiconductor chip is proportional to the area of the semiconductor chip. Therefore, there is a problem that the increase in the chip size causes an increase in cost.

  FIG. 19 is an explanatory diagram for explaining a problem in detecting an optical signal from a light source by a conventional optical angle sensor.

  The light source LED is not necessarily positioned reliably in the XZ plane (horizontal plane direction) that is detected by the light angle sensor 101. For example, the light source LED may be shifted in the Y-axis direction (perpendicular to the horizontal plane direction) with respect to the XZ plane.

  Further, the light source LEDa may be displaced by a deviation angle φ1 in a direction away from the Z axis (Y axis direction) in the YZ plane (vertical plane direction). In this case, since the light that has passed through the lens 111 is incident on the photodiode PD103 in the YZ plane at a position shifted in the Y-axis direction, the light signal LSa is incident from the light source LEDa. None of the photodiodes PD102, PD103, and PD104 can detect the light output current. Therefore, the direction of the light source LEDa cannot be detected.

  Further, there is a case where the deviation angle θ shifts from the Z axis on the XZ plane, and further the deviation angle φ2 shifts from the XZ plane in the Y axis direction to the position of the light source LEDb. In this case as well, any of the photodiodes PD102, PD103, and PD104 cannot be detected, and a light output current cannot be obtained. Therefore, the direction of the light source LEDa cannot be detected.

  FIG. 20 is an explanatory diagram for explaining the state of the light receiving element in which the chip area is larger than that of the light receiving element in the conventional optical angle sensor, (A) shows the chip layout of the conventional light receiving element, and (B) Indicates a chip layout of a light receiving element with an enlarged chip area.

  As described above, the optical signal LS of the light source LED at a position deviating from the XZ plane is shifted in the Y-axis direction, so that it is difficult to detect it by the photodiodes PD102, PD103, and PD104 (A in FIG. 1). As a countermeasure, it is conceivable to increase the width of the photodiodes PD102, PD103, and PD104 in the Y-axis direction so that the photodiodes PD105, PD106, and PD107 (FIG. B) are used.

  However, as shown in the figure, the photodiodes PD105, PD106, and PD107 have an extremely large chip area, making it difficult to reduce the size of the light angle sensor 101, and increasing the chip cost, which increases the cost of the light source direction detector. Leads to.

  FIG. 21 is an explanatory diagram for explaining the relationship between a conventional light angle sensor and a light source in a spherical coordinate system.

  A light source direction detector 101 whose light receiving surface is an XY plane is arranged in a three-dimensional space formed by XYZ axes intersecting each other. At this time, the light receiving elements (photodiodes PD102, PD103, PD104) are arranged in parallel in the X-axis direction.

  Consider a spherical space SP (r, θ, φ) in a spherical coordinate system in a three-dimensional space. That is, the distance from the light source direction detector 101 is represented by one moving radius r, and the displacement direction is represented by two deviation angles θ and φ. The declination θ represents the left / right inclination (declination angle ± θ) from the Z axis in the XZ plane (horizontal plane direction), and the declination φ is from the XZ plane in the direction perpendicular to the XZ plane (YZ plane). It represents the vertical tilt (deflection angle ± φ).

As shown in FIGS. 18 to 20, the light source direction detector 101 has a problem that it can detect only the deviation angle θ.
JP-A-6-241757

  As described above, the conventional light angle sensor (light source direction detector) requires a photodiode as a light receiving element to be arranged in a parallel direction in order to expand the detection angle with respect to the light source. There is a problem that the size of the direction detector cannot be reduced, resulting in an increase in cost.

  Further, the conventional optical angle sensor has a problem that the direction of the light source cannot be detected when it is displaced in the Y-axis direction with respect to the ZX plane, that is, when the light source is displaced in a three-dimensional direction. . In order to solve this problem, it is conceivable to lengthen the dimension of the light receiving element in the Y-axis direction. However, there is a problem that the size of the light receiving element becomes large and it is difficult to reduce the size, and the cost is increased. .

  In addition, the conventional optical angle sensor includes the optical angle sensor 101 in one spherical space SP (r, θ, φ) defined by one radius r, two declinations θ, and declination φ. There was a problem that only the declination θ could be detected as a device.

  Further, the conventional optical angle sensor has a problem that the distance to the light source cannot be detected. Further, for example, when an optical angle sensor is applied to a fan or the like, the angle of the remote control device viewed from the fan can be detected, but the distance to the remote control device (light source) cannot be detected.

  Further, the conventional optical angle sensor has many problems in detecting the direction of the light source, and there is a problem that it is not easy to apply to electronic devices (air conditioners, television receivers, stereo sound devices).

  The present invention has been made in view of such a situation, and an object thereof is to provide a light source direction detector in which the area of a light receiving element (photodiode) is reduced by separately arranging a plurality of light receiving elements. And

  It is another object of the present invention to provide a light source direction detector capable of detecting the light source direction even when the position of the light source is displaced (moved) three-dimensionally.

  Another object of the present invention is to provide a light source direction detector capable of detecting two declination angles (θ, φ) corresponding to two plane directions of a light source with a single device.

  Another object of the present invention is to provide a light source position detection device that can detect the position of a light source by detecting the distance to the light source using two light source direction detectors.

  It is another object of the present invention to provide an electronic device capable of accurate and quick remote control by applying the light source direction detector or the light source position detection device according to the present invention.

  A light source direction detector according to the present invention is a light source direction detector that receives a light signal from a light source and detects the direction of the light source, and includes a plurality of light receiving elements arranged separately from each other and light from the light source. A lens for condensing a signal to the light receiving element, and an arithmetic processing unit for performing arithmetic processing on an optical signal detection value detected by the light receiving element are provided.

  With this configuration, it is possible to accurately detect the direction of the light source (the displacement of the light source) using a light-receiving element that is downsized by greatly reducing the chip area of the light-receiving element.

  Further, in the light source direction detector according to the present invention, the plurality of light receiving elements are a first light receiving element and a second light receiving element that are separately arranged in a first axis direction, and the arithmetic processing unit includes the first light receiving element. The first optical signal detection value detected by one light receiving element and the second optical signal detection value detected by the second light receiving element are configured to perform arithmetic processing.

  With this configuration, for example, it is possible to easily and accurately calculate the left-right deflection angle θ of the light source in the horizontal plane based on the result of the calculation processing of the first optical signal detection value and the second optical signal detection value. It becomes.

  Further, in the light source direction detector according to the present invention, the plurality of light receiving elements intersects the first light receiving element and the second light receiving element separately disposed in the first axis direction, and intersects the first axis direction. A third light receiving element arranged corresponding to the first light receiving element in a biaxial direction and a fourth light receiving element arranged corresponding to the second light receiving element are arranged in a matrix. .

  With this configuration, the deflection angle of the light source can be changed by changing the combination of the light receiving elements in the spherical space (r, θ, φ) defined by one radius r, two deflection angles θ, and deflection angle φ. It is possible to accurately detect θ (for example, a left-right deflection angle in the horizontal plane direction) or a deflection angle φ (for example, a vertical deflection angle in the vertical plane direction).

  In the light source direction detector according to the present invention, the arithmetic processing unit may calculate a sum of a first optical signal detection value detected by the first light receiving element and a third optical signal detection value detected by the third light receiving element. The second optical signal detection value detected by the second light receiving element and the sum of the fourth optical signal detection value detected by the fourth light receiving element are configured to perform arithmetic processing.

  With this configuration, even when the light source is displaced in the second axis direction intersecting the first axis direction (for example, corresponding to the horizontal plane direction) (for example, corresponding to the vertical deviation angle φ in the vertical plane direction), The light source direction can be detected by accurately detecting the left-right deflection angle θ of the light source. That is, when detecting the direction of the declination θ in the space (r, θ, φ) composed of one radius r, two declinations θ, and declination φ, the light source is in the declination φ direction. Even when they deviate, it is possible to accurately detect the deflection angle θ direction of the light source.

  In the light source direction detector according to the present invention, the sum of the first optical signal detection value detected by the first light receiving element and the third optical signal detection value detected by the third light receiving element, and the second light receiving element. Or the first optical signal detection detected by the first light receiving element or the sum of the fourth optical signal detected value detected by the fourth light receiving element. Value and the sum of the second optical signal detection value detected by the second light receiving element, the third optical signal detection value detected by the third light receiving element, and the fourth optical signal detection value detected by the fourth light receiving element. A signal switching unit is provided for switching whether to calculate the sum.

  With this configuration, the first optical signal detection value, the second optical signal detection value, the third optical signal detection value, and the fourth optical signal detection value can be appropriately combined to perform arithmetic processing, and one radius r In the spherical space (r, θ, φ) composed of two declination angles θ and declination φ, the displacement of the light source in the horizontal plane direction (deviation angle θ) and the vertical direction of the light source in the vertical plane direction It is possible to accurately and easily detect the displacement (deviation angle φ), that is, the two-dimensional light source direction, with a single light source direction detector.

  A light source position detection device according to the present invention is a light source position detection device that detects a light source direction and a distance to the light source using at least two light source direction detectors, and the light source direction detector is provided in the present invention. It is the light source direction detector which concerns.

  With this configuration, it is possible to accurately and easily detect the distance to the light source (the position of the light source) in addition to the light source direction.

  An electronic apparatus according to the present invention is characterized in that the light source direction detector according to the present invention or the light source position detection device according to the present invention is mounted.

  With this configuration, it is possible to detect the light signal from the remote control device and accurately and easily detect the light source direction or light source position, so that the function of the electronic device is made to correspond to the light source direction or light source position. It becomes possible to exhibit efficiently and quickly.

  The electronic device according to the present invention is an air conditioner including an indoor unit having a louver controlled based on an optical signal from a light source included in a remote control device, the light source direction detector or The light source position detection device is provided, and the pointing direction of the louver is controlled based on the direction or distance of the remote control device relative to the indoor unit obtained by the light source direction detector or the light source position detection device. It is characterized by.

  With this configuration, it becomes possible to detect an optical signal from the remote control device, and the direction of the louver is easily and quickly controlled to direct the wind direction in the direction in which the remote control device exists or to avoid the wind direction. It becomes possible. That is, it is possible to set a wind direction state according to the user's situation.

  The electronic apparatus according to the present invention is a television receiver whose screen direction is adjusted by a screen direction adjusting unit controlled based on an optical signal from a light source included in a remote control device, and the light source A direction detector or the light source position detection device is provided, and the screen direction adjustment unit is controlled based on the direction or distance of the remote control device with respect to the main body determined by the light source direction detector or the light source position detection device. It is characterized by having a configuration.

  With this configuration, it becomes possible to detect an optical signal from the remote control device, and the screen direction adjustment unit is controlled to easily and quickly control the screen direction of the main body (display screen), thereby providing a higher visibility direction. It is possible to turn the screen direction. That is, the screen direction can be set in a direction according to the user's situation.

  The electronic apparatus according to the present invention is a television receiver including a superimposed image liquid crystal display unit having different display contents as a visual target in the left direction or the right direction with respect to the screen, and the light source direction detector or A function corresponding to the display content in the left direction when the direction of the remote control device with respect to the main body determined by the light source direction detector or the light source position detection device is the left direction. Control is executed, and when it is in the right direction, the control of the function corresponding to the display content in the right direction is executed.

  With this configuration, it is possible to detect an optical signal from the remote control device, and it is possible to easily and quickly control the function corresponding to the display content in the direction in which the remote control device exists. For example, when operating a dual-view liquid crystal television receiver equipped with a superimposed image liquid crystal display unit, the main unit can determine the direction of the remote control device, so the remote control device is operated from the left with respect to the television receiver. If the remote control device is operated from the right direction, the control for the display content in the right direction can be executed. That is, it is possible to execute function control according to the user's request.

  The electronic apparatus according to the present invention is a stereophonic audio apparatus including a main body that adjusts a volume of a speaker controlled based on an optical signal from a light source included in the remote control device, and the light source direction of the main body A configuration comprising a detector or the light source position detection device, wherein the volume of the speaker is controlled based on the direction or distance of the remote control device relative to the main body determined by the light source direction detector or the light source position detection device. It is characterized by being.

  With this configuration, it becomes possible to detect the optical signal from the remote control device, and to adjust the volume balance by controlling the volume of the speaker corresponding to the direction in which the remote control device exists easily and quickly. It becomes. That is, it is possible to set the volume balance of the speaker according to the user's situation.

  According to the present invention, since a plurality of light receiving elements are arranged separately and the optical signal from the light source is condensed on the light receiving elements, the area of the light receiving element (photodiode) can be reduced. That is, since the chip area of the light receiving element is greatly reduced, the cost of the light source direction detector can be reduced.

  Further, according to the light source direction detector according to the present invention, the plurality of light receiving elements are arranged in a matrix and the light signal from the light source is condensed on the light receiving elements, so that the position of the light source is three-dimensional. Even if it is displaced (moved), the light source direction can be detected.

  In addition, according to the light source direction detector according to the present invention, a plurality of light receiving elements are arranged in a matrix and the combination of optical signal detection values from the light receiving elements is changed, so that the light source can be obtained with a single device. It is possible to detect two declination angles (θ, φ) corresponding to the two plane directions.

  Further, according to the light source position detection device according to the present invention, since the two light source direction detectors are combined, the distance to the light source can be detected, and the position can be detected without being limited to the direction of the light source. It has the effect of becoming.

  In addition, according to the electronic apparatus according to the present invention, since the light source direction detector or the light source position detection device according to the present invention is applied, there is an effect that accurate and quick remote control is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
Based on FIG. 1 thru | or FIG. 3, the light source direction detector which concerns on Embodiment 1 of this invention is demonstrated.

  FIG. 1 is a perspective side view of the main configuration of the light source direction detector according to Embodiment 1 of the present invention seen through from the side surface of the light receiving element.

  The light source direction detector 1 according to the present embodiment includes a plurality of light receiving elements (a first light receiving element PD1 and a second light receiving element PD2 that are separated from each other and disposed on a plane. May be simply referred to as a light receiving element PD) and a light source LED (for example, LEDa, LEDb, LEDc, etc. depending on the position). .) (The optical signal LSa from the light source LEDa, the optical signal LSb from the light source LEDb, and the optical signal LSc from the light source LEDc. Hereinafter, when it is not necessary to distinguish these, they may be simply referred to as the optical signal LS.) And a lens 11 for condensing the light on the light receiving element PD.

  The light receiving element PD is configured by, for example, a photodiode, and after being placed on the mounting surface 12s, is sealed by the resin sealing portion 12 and protected from the external environment. The lens 11 and the resin sealing portion 12 are formed of a visible light cut resin in order to exclude visible light such as a fluorescent lamp assuming indoor use.

  The light emitted from the light source LED passes through the lens 11 and is condensed on the light receiving element PD, is photoelectrically converted by the first light receiving element PD1 and the second light receiving element PD2, and the first light receiving element PD1 detects the first optical signal. The value LD1 is output, and the second light receiving element PD2 outputs the second optical signal detection value LD2 (see FIG. 2). Hereinafter, when it is not necessary to distinguish these, the optical signal detection value LD may be simply used. ) As a configuration.

  The light source LED is incorporated in, for example, the remote control device 50 (see FIG. 6, so-called remote controller), and is generally composed of a light emitting diode that emits infrared light, and is connected to the lens 11 and the light receiving element PD. The beam diameter is set in advance so as to be condensed. That is, the remote control device 50 is an infrared remote control device.

  When the focal length f of the lens 11 is about 2 to 4 mm, for example, the first light receiving element PD1 and the second light receiving element PD2 have a rectangular chip size of about 2 to 3 mm, for example. Or about 4 mm. In addition, these shape dimensions can be appropriately set according to usage conditions such as the distance between the light source LED and the light source direction detector 1 and the application environment.

  Therefore, for example, when the optical signal LSa from the light source LEDa at the position of the deviation angle θ = 45 degrees with respect to the vertical direction of the mounting surface 12 s is incident through the lens 11, the optical signal LSa is transmitted from the lens 11 and the resin sealing portion 12. Although the light is condensed, the light reception is detected mainly by the first light receiving element PD1, and the first optical signal detection value LD1 larger than the second optical signal detection value LD2 is output.

  Similarly, when the optical signal LSc from the light source LEDc at the position of the deflection angle θ = −45 degrees enters through the lens 11, the optical signal LSc is collected by the lens 11 and the resin sealing portion 12. The light receiving detection is mainly performed by the second light receiving element PD2, and the second optical signal detection value LD2 larger than the first optical signal detection value LD1 is output.

  Further, when the optical signal LSb from the light source LEDb in the direction perpendicular to the mounting surface 12 s (deviation angle θ = 0 degree) is incident through the lens 11, the optical signal LSb is condensed by the lens 11 and the resin sealing portion 12. However, the first light receiving element PD1 and the second light receiving element PD2 receive and detect light almost equally, and output substantially the same first optical signal detection value LD1 and second optical signal detection value LD2.

  Accordingly, it is possible to obtain the light source direction (the direction of the light source LED with respect to the light source direction detector 1) by performing predetermined arithmetic processing on the first optical signal detection value LD1 and the second optical signal detection value LD2 described above. (See FIGS. 2 and 3).

  The light source LED is appropriately driven by pulse modulation, and is configured so that the optical signal LS from the light source LED can be distinguished from disturbance light so that the influence of noise can be removed.

  As described above, since the first light receiving element PD1 and the second light receiving element PD2 are arranged separately from each other, the first light receiving element PD1 and the second light receiving element PD2 can be reduced in size. It is possible to detect the exact light source direction (the direction of the light source LED / the displacement of the light source LED (deflection angle θ)). Since the miniaturized first light receiving element PD1 and second light receiving element PD2 are used, the chip area of the light receiving element PD can be reduced and the cost of the light source direction detector 1 can be greatly reduced.

  FIG. 2 is an explanatory diagram for explaining an optical signal detection value of the light source direction detector according to Embodiment 1 of the present invention, and (A) is an explanation showing the arrangement state of the light receiving elements and the connection relationship with the arithmetic processing unit. FIG. 4B shows the first optical signal detection value of the first light receiving element and the second optical signal detection value of the second light receiving element when the optical signal from the light source arranged at the deflection angle θ = 45 degrees is received. A graph showing a relative value, (C) is a first optical signal detection value of the first light receiving element and a second light of the second light receiving element when receiving an optical signal from a light source arranged at a deviation angle θ = 0 degree. The graph which shows the relative value of a signal detection value, (D) is the 1st optical signal detection value and the 2nd light reception of the 1st light receiving element when the optical signal from the light source arrange | positioned at deviation angle (theta) =-45 degree | time is received. It is a graph which shows the relative value of the 2nd optical signal detection value of an element.

  The light receiving elements PD are arranged in the first axial direction (X-axis direction), and the arrangement of the first light receiving elements PD1 and the second light receiving elements PD2 is the same as in FIG. An arithmetic processing unit 13 is connected to the first light receiving element PD1 and the second light receiving element PD2, and is configured to perform arithmetic processing on the first optical signal detection value LD1 and the second optical signal detection value LD2. The arithmetic processing unit 13 is configured to output the detector output SG (see FIG. 3) based on the arithmetic processing result (the arithmetic processing value SVout).

  When the light source LED is at a declination angle θ = 45 degrees, that is, when the optical signal LSa from the light source LEDa is mainly focused on the first light receiving element PD1 via the lens 11, the optical signal LSa is the first light receiving element. PD1 detects the first optical signal detection value LD1, and the second light receiving element PD2 detects the second optical signal detection value LD2. Since the optical signal LSa is mainly focused on the first light receiving element PD1, the first optical signal detection value LD1 is larger than the second optical signal detection value LD2 ((B) in the figure).

  When the light source LED is at the deflection angle θ = 0 degree, that is, when the optical signal LSb from the light source LEDb is condensed on the light receiving element PD via the lens 11, the optical signal LSb is the first light receiving element PD1. It is detected as the optical signal detection value LD1, and is detected as the second optical signal detection value LD2 in the second light receiving element PD2. Since the optical signal LSb is condensed almost uniformly on the first light receiving element PD1 and the second light receiving element PD2, the first optical signal detection value LD1 and the second optical signal detection value LD2 are detected as substantially equal values. (FIG. (C)).

  When the light source LED is at a declination angle θ = −45 degrees, that is, when the optical signal LSc from the light source LEDc is focused mainly on the second light receiving element PD2 via the lens 11, the optical signal LSc is the first light reception. The element PD1 detects the first optical signal detection value LD1, and the second light receiving element PD2 detects the second optical signal detection value LD2. Since the optical signal LSc is mainly condensed on the second light receiving element PD2, the second optical signal detection value LD2 is larger than the first optical signal detection value LD1 ((D) in the figure).

  As described above, the relative relationship between the first optical signal detection value LD1 and the second optical signal detection value LD2 varies depending on the position of the light source LED. That is, the position (light source direction) of the light source LED can be obtained by obtaining the relative relationship between the first optical signal detection value LD1 and the second optical signal detection value LD2. Note that the relative relationship between the first optical signal detection value LD1 and the second optical signal detection value LD2 can be obtained by executing an appropriate calculation in the arithmetic processing unit 13 as shown in FIG.

  FIG. 3 is an explanatory diagram for explaining the relationship between the arithmetic processing value and the deviation angle θ as a result of arithmetic processing of the optical signal detection value of the light source direction detector according to Embodiment 1 of the present invention.

  The arithmetic processing unit 13 included in the light source direction detector 1 according to the present embodiment includes, for example, (first optical signal detection value LD1−second optical signal detection value LD2) / (first optical signal detection value LD1 +) as arithmetic processing. Calculation defined by the second optical signal detection value LD2) = (difference in optical signal detection value) / (sum of optical signal detection values) is executed. The relationship between the calculation result in the calculation processing unit 13 and the deviation angle θ (detector output SG (θ)) is obtained as shown in FIG. 3, for example.

  In the figure, the horizontal axis represents the deflection angle θ (detector output SG), and the vertical axis represents the calculation processing value SVout of the light source direction detector 1. For example, the calculation result of the calculation processing unit 13 when the power supply voltage is 5 V (volts) is the calculation processing value SVout = 2.5 (V) at the deflection angle θ = 0 (degrees), and the deflection angle θ = 60 (degrees). Then, the calculation processing value SVout = 4.0 (V), and at the deflection angle θ = −60 (degrees), the calculation processing value SVout = 0.5 (V). These numerical values can be set to appropriate values by appropriately changing circuit constants, and are not limited to the illustrated numerical values.

  Note that the arithmetic processing unit 13 can be configured by appropriately combining known addition circuits, subtraction circuits, division circuits, and the like, and will not be described in detail.

  As shown in FIG. 3, the relationship between the deflection angle θ and the calculation processing value SVout can be uniquely defined, for example, as a substantially straight line by appropriate calculation processing. Therefore, by obtaining the calculation processing value SVout, the deflection angle θ (light source LED position: light source direction: detector output SG (θ)) can be detected. The relationship between the deflection angle θ and the calculation processing value SVout can be specified, for example, by storing it as a list in a memory (not shown) and comparing the calculation processing value SVout each time it is obtained.

  For example, when the memory capacity is limited, the list may be a rough table, and the declination θ may be appropriately calculated using a complementing method or the like. Such arithmetic processing can be executed by installing an appropriate program in a CPU (central processing unit) (not shown) in advance. Moreover, it is also possible to employ a configuration using a dedicated integrated circuit incorporating an arithmetic expression as necessary.

  As described above, the light source direction (for example, the light source in the horizontal plane direction) corresponding to the first axis direction based on the calculation processing result (calculation processing value SVout) for the first optical signal detection value LD1 and the second optical signal detection value LD2. The left-right deflection angle θ: the detector output SG (θ)) can be detected easily and accurately.

<Embodiment 2>
Based on FIG. 4, the light source direction detector which concerns on Embodiment 2 of this invention is demonstrated.

  FIG. 4 is an explanatory diagram for explaining the arrangement of the light receiving elements and the block configuration for obtaining the light source direction in the light source direction detector according to Embodiment 2 of the present invention.

  In the light source direction detector 1 according to the present embodiment, the arrangement of the light receiving element PD and the configuration of the optical signal detection value LD input to the arithmetic processing unit 13 are different from those of the first embodiment.

  In the present embodiment, four light receiving elements PD are arranged in a matrix on the mounting surface 12s, and the optical signal LS is condensed onto the light receiving element PD via the lens 11. That is, the first light receiving element PD1 and the second light receiving element PD2 arranged separately in the first axis direction (X-axis direction) and the first axis in the second axis direction (Y-axis direction) intersecting the first axis direction. A third light receiving element PD3 arranged corresponding to the light receiving element PD1 and a fourth light receiving element PD4 arranged corresponding to the second light receiving element PD2 are arranged in a matrix.

  The third direction as a direction perpendicular to the mounting surface 12 s corresponds to the first axis direction (X-axis direction) and the second axis direction (Y-axis direction) constituting a plane (XY plane) parallel to the mounting surface 12 s. An axial direction (Z-axis direction) can be defined. Accordingly, since the first axis direction and the third axis direction constitute, for example, the horizontal plane direction in the figure, the horizontal plane direction corresponds to the first axis direction. Since the second axis direction and the third axis direction constitute, for example, the vertical plane direction in the figure, the vertical plane direction corresponds to the second axis direction.

  In the present embodiment, the distance between the light source LED and the lens 11 is a distance r, a horizontal plane (XZ plane) defined by the first axis direction and the third axis direction, and a left-right displacement with respect to the third axis direction is expressed by a declination angle θ, The vertical displacement from the horizontal plane in the direction perpendicular to the horizontal plane is defined by the deflection angle φ. That is, the operation of the light source direction detector 1 will be described by defining a spherical space SP (r, θ, φ) corresponding to the spherical coordinate system.

  In the light source direction detector 1 shown in the case of the first embodiment, since the two light receiving elements PD are arranged separately in the first axis direction, when the light source LED is shifted in the declination φ direction, Since the optical signal LS is displaced in the second axis direction, it is difficult to detect the optical signal detection value LD, and it is difficult to detect the accurate light source direction.

  In order to solve this problem, in this embodiment, the sum of the first optical signal detection value LD1 detected by the first light receiving element PD1 and the third optical signal detection value LD3 detected by the third light receiving element PD3 is used as the optical signal. The detection value LD13 is set, and the sum of the second optical signal detection value LD2 detected by the second light receiving element PD2 and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 is set as the optical signal detection value LD24. In addition, the arithmetic processing unit 13 performs arithmetic processing on the optical signal detection value LD13 and the optical signal detection value LD24. The arithmetic processing can be executed in the same manner as in the first embodiment.

  That is, the arithmetic processing of (optical signal detection value LD13−optical signal detection value LD24) / (optical signal detection value LD13 + optical signal detection value LD24) = (difference of optical signal detection value) / (sum of optical signal detection values). Thus, the direction of the light source LED can be obtained as the calculation processing value SVout as in the case of the first embodiment. Therefore, similarly to the first embodiment, it is possible to easily and accurately detect the light source direction (the light source direction in the horizontal plane direction corresponding to the first axis direction, that is, the deflection angle θ).

  For example, in the case of the light source LEDa (deviation angle θ, deviation angle −φ), the first light receiving element PD1 and the second light receiving element PD2 mainly correspond to the directivity of the optical signal LSa. The first optical signal detection value LD1 detected by the PD1 is larger than the second optical signal detection value LD2 detected by the second light receiving element PD2, and the second optical signal detection value LD2 detected by the second light receiving element PD2 Is smaller than the first optical signal detection value LD1. In addition, the third optical signal detection value LD3 detected by the third light receiving element PD3 and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 are small values similar to the second optical signal detection value LD2.

  Further, in the case of the light source LEDb (declination angle -θ, declination angle -φ), the first light receiving element PD1 and the second light receiving element PD2 mainly correspond to the directivity of the optical signal LSb as in the case of the light source LEDa. However, the second optical signal detection value LD2 detected by the second light receiving element PD2 is a large value, and the first optical signal detection value LD1 detected by the first light receiving element PD1 is a small value. Further, the third optical signal detection value LD3 detected by the third light receiving element PD3 and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 are small values like the first optical signal detection value LD1.

  In the case of the light source LEDc (deviation angle θ, deviation angle φ), the third light receiving element PD3 and the fourth light receiving element PD4 mainly correspond to the directivity of the optical signal LSc, but the third light receiving element PD3. The third optical signal detection value LD3 detected by is higher than the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4, and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 is The value is smaller than the third optical signal detection value LD3. Further, the first optical signal detection value LD1 detected by the first light receiving element PD1 and the second optical signal detection value LD2 detected by the second light receiving element PD2 are small values like the fourth optical signal detection value LD4.

  Further, in the case of the light source LEDd (declination angle −θ, declination angle φ), the third light receiving element PD3 and the fourth light receiving element PD4 mainly correspond to the directivity of the optical signal LSd as in the case of the light source LEDc. However, the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 is a large value, and the third optical signal detection value LD3 detected by the third light receiving element PD3 is a small value. Further, the first optical signal detection value LD1 detected by the first light receiving element PD1 and the second optical signal detection value LD2 detected by the second light receiving element PD2 are small values like the fourth optical signal detection value LD4.

  Further, in the case of the light source LEDe (deviation angle θ, deviation angle φ = 0), the optical signal LSe is condensed at a condensing point Pte between the first light receiving element PD1 and the third light receiving element PD3 due to directivity. The first optical signal detection value LD1 detected by the first light receiving element PD1 and the third optical signal detection value LD3 detected by the third light receiving element PD3 are substantially equal, and the second optical signal detection detected by the second light receiving element PD2 is detected. The value LD2 and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 are substantially equal. The first optical signal detection value LD1 and the third optical signal detection value LD3 are larger than the second optical signal detection value LD2 and the fourth optical signal detection value LD4.

  Further, in the case of the light source LEDf (deviation angle −θ, deviation angle φ = 0), the optical signal LSf is condensed on the condensing point Ptf intermediate between the second light receiving element PD2 and the fourth light receiving element PD4 from the directivity. As in the case of the light source LEDe, the first light signal detection value LD1 detected by the first light receiving element PD1 and the third light signal detection value LD3 detected by the third light receiving element PD3 are substantially equal, and the second light receiving element PD2 The second optical signal detection value LD2 detected by and the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4 are substantially equal. Further, the second optical signal detection value LD2 and the fourth optical signal detection value LD4 are larger than the first optical signal detection value LD1 and the third optical signal detection value LD3.

  As described above, when the light source LED is displaced at the deflection angle φ, the magnitude relationship between the third light receiving element PD3 and the fourth light receiving element PD4 (third optical signal detection value LD3 and fourth optical signal detection value LD4) is mainly used. This makes it possible to detect the light source direction. Further, when the light source LED is displaced by the declination angle −φ, mainly due to the magnitude relationship between the first light receiving element PD1 and the second light receiving element PD2 (first optical signal detection value LD1 and second optical signal detection value LD2). The light source direction can be detected.

  That is, the calculation processing target is the optical signal detection value LD13 (first optical signal detection value LD1 + third optical signal detection value LD3) and optical signal detection value LD24 (second optical signal detection value LD2 + fourth optical signal detection value LD4). Therefore, regardless of the displacement of the light source LED in the direction of the declination φ (and declination −φ), the optical signal detection value LD (the optical signal detection value LD13, the optical signal detection value in the first axis direction). LD24) can be detected.

  Therefore, even when the light source LED is displaced up and down in the vertical plane direction (deviation angle φ, deviation angle −φ), the optical signal detection value LD13 and the optical signal detection value LD24 are subjected to arithmetic processing (see FIG. 3). Accordingly, it is possible to easily and accurately detect the left-right displacement (deflection angle θ. Light source direction: detector output SG (θ)) in the horizontal plane direction to be detected.

  In the light source direction detector 1 according to the present embodiment, the case where the deflection angle θ in the horizontal plane direction is detected has been described. However, since the horizontal plane direction and the vertical plane direction have a relative positional relationship, they are opposite to each other. As a relationship, it is also possible to adopt a configuration in which the deflection angle φ in the vertical direction is detected.

  As described above, in the light source direction detector 1 according to the present embodiment, since the light receiving elements PD are arranged in a matrix, when detecting the declination angle θ (and declination angle −θ), the position of the light source LED It is possible to detect the optical signal detection value LD (optical signal detection value LD13, optical signal detection value LD24) even when is displaced to the deflection angle φ (and the deflection angle −φ).

  Therefore, in the light source direction detector 1 according to the present embodiment, even when the light source LED moves three-dimensionally in the spherical space SP (r, θ, φ), for example, in the horizontal plane direction corresponding to the first axis direction. Since the light source direction (deviation angle θ in the horizontal plane direction: detector output SG (θ)) is accurately detected, the light source position (light source direction) can be easily and accurately detected.

<Embodiment 3>
In the case of the second embodiment, the optical signal detection value LD (detected by the light receiving elements PD (first light receiving element PD1, second light receiving element PD2, third light receiving element PD3, fourth light receiving element PD4) arranged in a matrix form). The calculation processing of the first optical signal detection value LD1, the second optical signal detection value LD2, the third optical signal detection value LD3, and the fourth optical signal detection value LD4) is fixed.

  That is, the light source direction detector 1 according to Embodiment 2 includes the sum of the first optical signal detection value LD1 and the third optical signal detection value LD3 (optical signal detection value LD13), the second optical signal detection value LD2, and the second optical signal detection value LD2. By performing arithmetic processing on the sum of the four optical signal detection values LD4 (optical signal detection value LD24), the light source LED moves three-dimensionally in the spherical space SP (r, θ, φ) (the position of the light source LED is Even when the deflection angle φ (and displacement to the deflection angle −φ) is detected, the deflection angle θ (and the deflection angle −θ) can be detected.

  On the other hand, in the third embodiment, the optical signal detection value detected by the light receiving elements PD (first light receiving element PD1, second light receiving element PD2, third light receiving element PD3, fourth light receiving element PD4) arranged in a matrix. When processing the LD (first optical signal detection value LD1, second optical signal detection value LD2, third optical signal detection value LD3, fourth optical signal detection value LD4) by the arithmetic processing unit 13, the processing target ( By switching the combination of the optical signal detection values LD), the deflection angle φ is detected in addition to the deflection angle θ. Since other configurations are the same as those of the second embodiment, description thereof will be omitted as appropriate.

  Based on FIG. 5, the light source direction detector which concerns on Embodiment 3 of this invention is demonstrated.

  FIG. 5 is an explanatory diagram for explaining the arrangement of the light receiving elements and the block configuration for obtaining the light source direction in the light source direction detector according to Embodiment 3 of the present invention.

  The light source direction detector 1 detects the sum of the first light signal detection value LD1 detected by the first light receiving element PD1 and the third light signal detection value LD3 detected by the third light receiving element PD3 and the second light receiving element PD2. Calculation processing is performed on the second optical signal detection value LD2 and the sum of the fourth optical signal detection value LD4 detected by the fourth light receiving element PD4, or the first optical signal detection value detected by the first light receiving element PD1 The sum of the second optical signal detection values LD2 detected by LD1 and the second light receiving element PD2, and the fourth optical signal detection detected by the third optical signal detection value LD3 and the fourth light receiving element PD4 detected by the third light receiving element PD3. A signal switching unit 15 is provided for switching whether to calculate the sum of the values LD4.

  That is, when detecting the deviation angle θ, the signal switching unit 15 sets the sum of the first optical signal detection value LD1 and the third optical signal detection value LD3 as the optical signal detection value LDa, and also detects the second optical signal detection. The sum of the value LD2 and the fourth optical signal detection value LD4 is defined as an optical signal detection value LDb. Therefore, it is possible to detect the deviation angle θ (detector output SG (θ)) by performing arithmetic processing on the optical signal detection value LDa and the optical signal detection value LDb in the same manner as in the second embodiment. .

  When detecting the deflection angle φ, the signal switching unit 15 sets the sum of the first optical signal detection value LD1 and the second optical signal detection value LD2 as the optical signal detection value LDa, and also detects the third optical signal detection. The sum of the value LD3 and the fourth optical signal detection value LD4 is defined as an optical signal detection value LDb. Therefore, it is possible to detect the deflection angle φ (detector output SG (φ)) by performing arithmetic processing on the optical signal detection value LDa and the optical signal detection value LDb in the same manner as in the second embodiment. .

  Therefore, since the calculation processing object is switched by switching the combination of the optical signal detection value LD corresponding to the optical signal detection value LDa and the optical signal detection value LDb, it is possible to detect both the deflection angle θ and the deflection angle φ. It becomes. That is, the single light source direction detector 1 can obtain two deviation angles θ and deviation angles φ (that is, detector output SG (θ, φ)).

  By the signal switching unit 15 provided between the light receiving element PD and the arithmetic processing unit 13, the first optical signal detection value LD1, the second optical signal detection value LD2, the third optical signal detection value LD3, and the fourth optical signal detection value. Predetermined arithmetic processing can be performed on each two combinations selected from the LD 4, and the displacement corresponding to the first axis direction of the light source LED (for example, the deflection angle θ in the horizontal plane direction) and the second axis direction Corresponding displacement (for example, the deviation angle φ in the vertical plane direction), that is, the three-dimensional light source direction can be accurately and easily detected by the single light source direction detector 1.

<Embodiment 4>
A light source position detection apparatus according to Embodiment 4 of the present invention will be described based on FIG.

  FIG. 6 is an explanatory diagram illustrating a schematic configuration of a light source position detection device according to Embodiment 4 of the present invention.

  The light source position detection device 2 according to the present embodiment includes two light source direction detectors 1 described in the first to third embodiments (a light source direction detector 1a and a light source direction detector 1b. Hereinafter, a plurality of light sources). When there is no need to distinguish the direction detector 1, it is simply referred to as the light source direction detector 1.) That is, the light source position detection device 2 includes a light source direction detector 1a and a light source direction detector 1b having the same specifications.

  For example, the light source position detection device 2 is incorporated in the electronic device 20. The light source position detector 2 (the light source direction detector 1a and the light source direction detector 1b) detects the optical signal LS transmitted from the remote control device 50 to the light source position detector 2.

  First, the optical signal LSa is transmitted toward the light source direction detector 1a with the remote control device 50 set to the position of the light source LEDa. As shown in the first to third embodiments, the deviation angle θ1 is detected by the light source direction detector 1a. Next, the optical signal LSb is transmitted toward the light source direction detector 1b with the remote control device 50 in the position of the light source LEDb. The deviation angle θ2 is detected by the light source direction detector 1b.

  Since the light source position detection device 2 is mounted on the electronic device 20, the interval La between the light source direction detectors 1a and 1b is constant. When the distance Lb between the position Ptm where the remote control device 50 faces the light source position detection device 2 and the light source direction detector 1b and the distance Ld between the remote control device 50 and the electronic device 20 are set, the following equations 1 and 2 are obtained. It holds true geometrically.

tan θ1 = Ld / (La−Lb) (1), tan θ2 = Ld / Lb (2)
Accordingly, when the distance Ld is obtained using the equations 1 and 2 as simultaneous equations, the following equation 3 is obtained.

Ld = La (tan θ1 · tan θ2) / (tan θ1 + tan θ2) (3)
For example, if La = 1.5 m, θ1 = 75 degrees, and θ2 = 60 degrees, tan θ1 = 3.73 and tanθ2 = 1.73, and the distance Ld = 1.5 × 3.73 × 1.73 / (3 .73 + 1.73) ≈1.77 m, the distance Ld is obtained. Further, the distance Lb is obtained by setting the distance Lb = Ld / tan θ2 = 1.77 / 1.73 = 1.02 m.

  As described above, two light source direction detectors 1 are used on a single plane (for example, a horizontal plane as a zx plane defined by the first axis direction (X axis direction) and the third axis direction (Z axis direction)). According to the light source position detection device 2, the position (light source direction, light source position) of the light source LED including the distance Ld can be obtained easily and accurately.

<Embodiment 5>
Based on FIG. 7, the light source position detection apparatus according to Embodiment 5 of the present invention will be described.

  FIG. 7 is an explanatory diagram illustrating a schematic configuration of a light source position detection device according to Embodiment 5 of the present invention.

  A case where the position Pts of the light source LEDs mounted on the remote control device 50 is detected will be described. A projection point Pxz (x, 0, z) on the XZ plane at the position Pts and a projection point Pyz (0, y, z) on the YZ plane are set.

  Similarly to the case of the fourth embodiment, the optical signals LS (LSa, LSb) from the projection point Pxz are applied, and the deflection angles θ1, θ2 on the XZ plane are detected by the light source direction detector 1a and the light source direction detector 1b. Is detected. Next, the distance Ldx and the distance Lbx from the XY plane of the light source LEDs in the XZ plane are calculated using the distance Lax and the declination angles θ1 and θ2.

  Similarly to the case of the fourth embodiment, the optical signal LS (LSc, LSd) from the projection point Pyz is applied, and the light source direction detector 1c and the light source direction detector 1d are used to make the deflection angle φ1 on the YZ plane. , Φ2 is detected. Next, the distance Ldy and the distance Lby from the XY plane of the light source LEDs in the YZ plane are calculated using the distance Lay and the declination angles φ1 and φ2.

  As described above, the light source position detection device 2 according to the present embodiment includes the four light source direction detectors 1 (light source direction detectors 1a, 1b, 1c, and 1d), and therefore, in the XZ plane and the YZ plane. The distance and direction (light source position) of the light source LEDs (remote control device 50) can be obtained, and the light source position detection device 2 (light source direction detectors 1a, 1b, 1c,. It becomes possible to detect the position (coordinates) from 1d).

<Embodiment 6>
Based on FIG. 8 thru | or FIG. 10, the relationship between the air conditioner as an electronic device which concerns on Embodiment 6 of this invention, and a light source direction detector is demonstrated.

  FIG. 8 is an explanatory diagram for explaining the application status of the light source direction detector in the air conditioner according to Embodiment 6 of the present invention.

  The air conditioner as an electronic device includes a remote control device 50 (for example, a remote control device 50a when specified when arranged at the position Pta, and a remote control device 50b when specified when arranged at the position Ptb. Hereinafter, the indoor unit 21 having a louver (not shown) that is controlled based on the optical signal LS from the light source LED provided in the remote control device 50 when it is not necessary to distinguish according to the arranged position. Is provided. One light source direction detector 1 (light source detector 21d; see FIG. 10) shown in the first to third embodiments is attached to the indoor unit 21.

  For example, when the remote control device 50a is operated at the position Pta, the light source direction detector 1 obtains a position angle θpa formed by the remote control device 50a with respect to the wall surface (indoor unit 21) based on the optical signal LSa. Further, when the remote control device 50b is operated at the position Ptb, the position angle θpb formed by the remote control device 50b with respect to the wall surface (indoor unit 21) is obtained based on the optical signal LSb.

  The position angle θpa or the position angle θpb indicates the direction of the remote control device 50 with respect to the indoor unit 21. Therefore, the indoor unit 21 can control the left and right direction (directing direction) of the louver according to the direction of the remote control device 50 (the position angle θpa or the position angle θpb obtained by the light source direction detector 1). Become.

  Further, for example, the switching unit 15 (see FIG. 5) switches from left / right angle detection to vertical angle detection, thereby detecting the floor surface angle θfa from the indoor unit 21 at the position Pta and detecting the indoor unit 21 at the position Ptb. It is possible to detect the floor surface angle θfb from and to control the vertical direction (directing direction) of the louvers according to the floor surface angle θfa or the floor surface angle θfb.

  For example, the left and right angle detection is performed to adjust the left and right directivity directions of the louver, and the upper and lower angle detection is performed to adjust the upper and lower direction directions of the louver so that the remote control device 50 (operator's (Direction) can be controlled.

  With this configuration, it is possible to change the direction of the louvers so that the wind from the indoor unit 21 hits a place where a person is present. On the contrary, a person (such as an air blower in a direction slightly deviated from the person who operated the remote control device 50 so that the wind from the indoor unit 21 does not directly hit the person and is not too far away) It is possible to set the left and right and up and down directivity directions of the louver according to the position where the remote control device 50) is located. Therefore, it is possible to prevent an overcooling and efficiently air-condition (cool / heat) only a person's surroundings, thereby suppressing the electricity consumption of the indoor unit 21 and performing an efficient operation.

  FIG. 9 is an explanatory diagram for explaining an application situation of a plurality of light source direction detectors in an air conditioner according to Embodiment 6 of the present invention.

  The basic configuration of the air conditioner is the same as that in FIG. A plurality of light source direction detectors 1 are arranged in the indoor unit 21 (see Embodiment 4 and Embodiment 5) to form a light source position detection device 2 (light source detector 21d; see FIG. 10). That is, when the two light source direction detectors 1a and 1b are used, the coordinates (two-dimensional coordinates) of the remote control device 50 on the floor surface (horizontal plane) can be obtained. Further, when the four light source direction detectors 1a, 1b, 1c, and 1d are used, the three-dimensional coordinates of the remote control device 50 including the height from the floor surface can be obtained.

  For example, the light signal LS from the remote control device 50 (light source LED) is projected and condensed on each of the four light source direction detectors 1 from the position Pta. By applying the fourth embodiment in this state, it is possible to obtain a two-dimensional coordinate position on the floor (on the plane) or a three-dimensional coordinate position on the room (on the space). .

  If not only the angle but also the position coordinates are known as in the present embodiment, finer control becomes possible. For example, when a person (remote control device 50) is at a position far from the indoor unit 21, it is possible to execute air volume adjustment in addition to louver adjustment such as increasing the wind, and energy use is efficient. It is possible to perform control that is comfortable for humans (such as strong winds that do not hit too much or soft winds).

  FIG. 10 is an explanatory diagram illustrating a louver control mode in the air conditioner according to Embodiment 6 of the present invention.

  The remote control device 50 operates as a light source LED for an operation mode in which normal remote control processing is performed and the light source detector 21d (the light source direction detector 1 or the light source position detection device 2 shown in the first to fifth embodiments). Detection mode. In the indoor unit 21, a remote function unit 50r as a receiving side of the remote control device 50 is arranged. The remote function unit 50r is a remote control light receiving element 21a that receives the optical signal LS from the remote control device 50, a signal processing unit 21b that processes a signal from the remote control light receiving element 21a, and various types of the indoor unit 21 according to instructions from the signal processing unit 21b. The remote control instruction processing unit 21c for operating the function, the light source detector 21d, the microcomputer 21e that controls the indoor unit 21 according to the detector output SG that is the detection result of the light source detector 21d, and the louver motor 21g according to the instruction from the microcomputer 21e A louver motor control unit 21f to be controlled and a louver motor 21g are provided.

  In the normally set operation mode, an optical signal from the remote control device 50 is input to the remote control light receiving element 21a, subjected to signal processing by the signal processing unit 21b, and remote control instruction processing for normal remote control operation corresponding to the signal content. This is performed by the unit 21c.

  When the detection mode is set, the detection switch 50ds for detection mode designation is turned on to transmit the optical signal LS to the remote control light receiving element 21a, and the signal processing unit 21b switches the operation mode to the detection mode. Set to mode. In the detection mode, the position (direction, distance, coordinates) of the light source LED is detected by the light source detector 21d by the method described in the above embodiment. Based on the detector output SG output from the light source detector 21d as a detection result, the microcomputer 21e sends a control signal to the louver motor control unit 21f, and the louver motor control unit 21f controls the louver motor 21g according to the control signal. This controls the orientation of the louvers.

  By using the light source detector 21d, the direction (position, coordinates) of the light source LED (remote control device 50) is based on the optical signal LS from the light source LED of the remote control device 50 as a function that the conventional human detection sensor does not have. ) Can be automatically detected. Accordingly, the direction of the remote control device 50 can be instantaneously determined and detected in accordance with the operation of the remote control device 50, as compared with the conventional human detection sensor system in which the sensor scans the entire room. Further, by using the light source detector 21d, the louver directing direction (wind direction of the indoor unit 21) is changed at the timing intended by the operator of the remote control device 50, compared to the case where the indoor unit 21 detects a person. Is possible. That is, it is possible to set a wind direction state according to the user's situation.

<Embodiment 7>
Based on FIG. 11 and FIG. 12, the relationship between a television receiver as an electronic apparatus according to Embodiment 7 of the present invention and a light source direction detector will be described.

  FIG. 11 is an explanatory diagram for explaining the application status of the light source direction detector in the television receiver according to Embodiment 7 of the present invention.

  The television receiver 22 as an electronic device is a remote control device 50 (for example, the remote control device 50a when specified when arranged at the position Pta, and the remote control device when specified when arranged at the position Ptb). 50b, when specified at the position Ptc, the remote control device 50c is used.Hereinafter, when it is not necessary to distinguish between the positions, it is simply referred to as the remote control device 50). A screen swing motor 22g as a screen direction adjusting unit controlled based on the optical signal LS is provided. The television receiver 22 has one light source direction detector 1 (light source detector 22d, see FIG. 12) shown in the first to third embodiments attached to the main body portion 22mb.

  For example, when the remote control device 50a is operated at the position Pta, the light source direction detector 1 has a position angle θ formed by the remote control device 50a with respect to the television receiver 22 (main body portion 22mb) based on the optical signal LS. (In the figure, only the position angle θ with respect to the position Ptb is representatively shown.) Further, when the remote control device 50b is operated at the position Ptb, a position angle θ made by the remote control device 50b with respect to the television receiver 22 (main body portion 22mb) is obtained based on the optical signal LS. When the remote control device 50c is operated at the position Ptc, the position angle θ formed by the remote control device 50b with respect to the television receiver 22 (main body portion 22mb) is obtained based on the optical signal LS.

  Based on the position angle θ of the remote control device 50 (light source LED), the screen swing motor 22g is controlled to rotate the display screen 22s in the rotation direction Rot so that the screen direction is the direction facing the remote control device 50. It becomes possible. Since the control is performed based on the position angle θ defined by the positional relationship between the light source direction detector 1 and the main body portion 22mb, the screen direction can be performed with high accuracy.

  FIG. 12 is an explanatory diagram for explaining a screen aspect control mode in the television receiver according to the seventh embodiment of the present invention.

  The remote control device 50 operates as a light source LED for an operation mode in which normal remote control processing is performed and the light source detector 22d (the light source direction detector 1 or the light source position detection device 2 shown in the first to fifth embodiments). Detection mode. The television receiver 22 is provided with a remote function unit 50r as a receiving side of the remote control device 50. The remote function unit 50r receives a light signal LS from the remote control device 50, a remote control light receiving element 22a, a signal processing unit 22b for processing a signal from the remote control light receiving element 22a, and an instruction from the signal processing unit 22b. A remote control instruction processing unit 22c for operating various functions of the TV, a light source detector 22d, and a microcomputer 22e that controls the screen direction of the display screen 22s of the television receiver 22 in accordance with the detector output SG that is the detection result of the light source detector 22d. A screen swing motor control unit 22f for controlling the screen swing motor 22g according to an instruction from the microcomputer 22e and a screen swing motor 22g are provided.

  In the normally set operation mode, the optical signal from the remote control device 50 is input to the remote control light receiving element 22a, subjected to signal processing by the signal processing unit 22b, and remote control instruction processing for normal remote control operation according to the signal content. This is performed in the part 22c.

  In the detection mode, the detection switch 50ds for detection mode designation is turned on, the optical signal LS is transmitted to the remote control light receiving element 22a, and the signal processing unit 22b switches from the operation mode to the detection mode. Set to mode. In the detection mode, the position (direction, distance, coordinates) of the light source LED is detected by the light source detector 22d by the method described in the above embodiment. Based on the detector output SG output from the light source detector 22d as a detection result, the microcomputer 22e sends a control signal to the screen swing motor control unit 22f, and the screen swing motor control unit 22f responds to the control signal according to the control signal. By controlling the swing motor 22g, the screen direction of the display screen 22s is controlled so as to face the remote control device 50.

  By using the light source detector 21d, the direction (position, coordinates) of the light source LED (remote control device 50) is based on the optical signal LS from the light source LED of the remote control device 50 as a function that the conventional human detection sensor does not have. ) Can be automatically detected. Accordingly, the direction of the remote control device 50 can be instantaneously determined and detected in accordance with the operation of the remote control device 50, as compared with the conventional human detection sensor system in which the sensor scans the entire room. Further, by using the light source detector 22d, it is possible to change the screen direction of the display screen 22s at a timing intended by the operator of the remote control device 50, compared to the case where the human body detection sensor detects a person. That is, the screen direction can be set in a direction according to the user's situation.

<Eighth embodiment>
Based on FIG. 13 and FIG. 14, the relationship between a television receiver as an electronic apparatus according to Embodiment 8 of the present invention and a light source direction detector will be described. Note that the television receiver according to the present embodiment is a so-called dual-view liquid crystal television that includes a superimposed image liquid crystal display unit that has different display contents as visual objects when viewed from the left and right directions with respect to the screen. That is, the dual-view liquid crystal television means a liquid crystal television having a single liquid crystal display screen, which is different in a left visual screen viewed from the left side and a right visual screen viewed from the right side.

  FIG. 13 is an explanatory diagram for explaining the application status of the light source direction detector in the television receiver according to Embodiment 8 of the present invention.

  As described above, the television receiver 23 as an electronic device is viewed at the position Pta on the left side from the facing direction and the position Ptb on the right side from the facing direction with respect to the display screen 23s (superimposed image liquid crystal display unit 23s). Different screens will be displayed depending on the screen. In the television receiver 23, one light source direction detector 1 (light source detector 23d, see FIG. 14) shown in the first to third embodiments is attached to the main body 23mb.

  For example, when the remote control device 50a is operated at the position Pta, the light source direction detector 1 has a position angle θa formed by the remote control device 50a with respect to the television receiver 23 (main body portion 23mb) based on the optical signal LS. Ask for. Further, when the remote control device 50b is operated at the position Ptb, the position angle θb formed by the remote control device 50b with respect to the television receiver 23 (main body portion 23mb) is obtained based on the optical signal LS.

  Therefore, since the position of the remote control device 50 can be determined based on the position angle θa or the position angle θb, when the position angle θa (the remote control device 50 is on the left side) is detected, A function that controls the function corresponding to the display content (left viewing screen) and detects the position angle θb (the remote control device 50 is on the right side) and the function corresponding to the right display content (right viewing screen). The control is executed. That is, by detecting the optical signal LS from the remote control device 50, it is possible to easily and quickly control the function corresponding to the display content of the visual screen viewed from the direction corresponding to the remote control device 50. Become. Note that the functions corresponding to each viewing screen include, for example, channel change, volume adjustment, screen adjustment, and the like.

  FIG. 14 is an explanatory diagram for explaining a control mode corresponding to the display content on the television receiver according to the eighth embodiment of the present invention.

  In the remote control device 50, a remote function unit 50 r as a receiving side of the remote control device 50 is arranged in the television receiver 23. The remote function unit 50r includes a remote control light receiving element 23a that receives the optical signal LS from the remote control device 50, a signal processing unit 23b that processes a signal from the remote control light receiving element 23a, a light source detector 23d, and detection results of the light source detector 23d. Depending on the left / right determination result in the left / right determination unit 23h and the left / right determination unit 23h for performing the left / right determination (determination of whether the remote control device 50a or the remote control device 50b) according to the detector output SG Left / right sorting unit 23i that distributes the processing signal from the signal processing unit 23b in correspondence with the left and right, a left viewing screen corresponding control unit 23j as a control unit that controls a function corresponding to the left viewing screen, and a function corresponding to the right viewing screen The right visual screen corresponding control unit 23k is provided as a control unit for controlling.

  That is, the television receiver 23 according to the present embodiment executes the function control corresponding to the display content in the left direction when the position direction of the remote control device 50 facing the main body portion 23mb is the left direction. When the direction of the remote control device 50 with respect to the unit 23mb is the right direction, the function corresponding to the display content in the right direction is controlled.

  Therefore, for example, when operating the dual-view liquid crystal television, the direction of the remote control device 50 can be determined (left / right determination) by the main body 23mb, so the remote control device 50 is operated in the left direction with respect to the television receiver 23. If the remote control device 50 is operated in the right direction, the control on the display content in the right direction can be executed. That is, it is possible to execute function control according to the user's request.

  Since a general remote control function is the same as that in the seventh embodiment, description and illustration are omitted.

<Embodiment 9>
Based on FIG. 15 and FIG. 16, the relationship between the stereo sound device as the electronic device according to the ninth embodiment of the present invention and the light source direction detector will be described.

  FIG. 15 is an explanatory diagram for explaining the application status of the light source direction detector in the stereophonic audio apparatus according to Embodiment 9 of the present invention.

  A stereo sound device 24 as an electronic device includes a main body 24mb and speakers SP1, SP2, SP3, and SP4 driven by the main body 24mb. For example, the speaker SP1 and the speaker SP2 are arranged on the left and right of the main body 24mb, and the speaker SP3 and the speaker SP4 (hereinafter referred to simply as the speaker SP when it is not necessary to distinguish the speakers SP1, SP2, SP3 and SP4) are the main body 24mb. It is arranged at the left and right positions on the remote control device 50 side away from the remote control device 50 so that the listener can recognize it as a three-dimensional sound. That is, the speaker SP is a stereo set constituting a three-dimensional sound field, and there is no particular limitation on the arrangement state and the number of arrangement.

  The stereo sound device 24 is a remote control device 50 (for example, the remote control device 50a when specified when placed at the position Pta, and the remote control device 50b when specified when placed at the position Ptb). In the case where it is not necessary to make a distinction according to the arranged position, the remote control device 50 is simply provided). In the stereo sound device 24, one light source direction detector 1 (light source detector 24d, see FIG. 16) shown in the first to third embodiments is attached to the main body 24mb.

  For example, when the remote control device 50a is operated at the position Pta, the light source direction detector 1 has a position angle θa that the remote control device 50a forms with respect to the stereo acoustic device 24 (main body portion 24mb) based on the optical signal LS. Ask. Further, when the remote control device 50b is operated at the position Ptb, the position angle θb formed by the remote control device 50b with respect to the stereo acoustic device 24 (main body portion 24mb) is obtained based on the optical signal LS (hereinafter referred to as the position angle θa). , Θb is simply the position angle θ when it is not necessary to distinguish between them.)

  Based on the position angle θ of the remote control device 50 (light source LED), it is possible to control the volume of the speaker SP and adjust the volume balance of the speaker SP. For example, when the remote control device 50b is operated at the position Ptb, the position angle θb with respect to the main body 24mb is detected, so that the volume of the speakers SP2 and SP4 arranged closer to the remote control device 50b is increased. To make it easier to hear. Further, when the remote control device 50a is operated at the position Pta, the position angle θa with respect to the main body 24mb is detected, so that the volume of the speakers SP1 and SP3 arranged closer to the remote control device 50a is increased. To make it easier to hear.

  FIG. 16 is an explanatory diagram for explaining a control mode of speaker volume balance in the stereophonic audio apparatus according to Embodiment 9 of the present invention.

  The remote control device 50 operates as a light source LED for an operation mode in which normal remote control processing is performed and the light source detector 24d (the light source direction detector 1 or the light source position detection device 2 shown in the first to fifth embodiments). Detection mode. The stereo sound device 24 is provided with a remote function unit 50r as a receiving side of the remote control device 50. The remote function unit 50r receives the optical signal LS from the remote control device 50, the remote control light receiving element 24a, the signal processing unit 24b for processing the signal from the remote control light receiving element 24a, and the stereo sound device 24 according to the instructions of the signal processing unit 24b. A remote control instruction processing unit 24c that operates various functions, a light source detector 24d, a microcomputer 24e that controls the stereo sound device 24 according to a detector output SG that is a detection result of the light source detector 24d, and speaker driving according to instructions from the microcomputer 24e A speaker volume balance adjusting unit 24f for controlling the unit 24g. For example, the speaker driving unit 24g (sp1) corresponds to the speaker SP1.

  In the normally set operation mode, the optical signal from the remote control device 50 is input to the remote control light receiving element 24a, subjected to signal processing by the signal processing unit 24b, and remote control instruction processing for normal remote control operation according to the signal content. This is performed by the unit 24c.

  When the detection mode is set, the detection switch 50ds for detection mode designation is turned on to transmit the optical signal LS to the remote control light receiving element 24a, and the signal processing unit 24b switches the operation mode to the detection mode. Set to mode. In the detection mode, the position (direction, distance, coordinates) of the light source LED is detected by the light source detector 24d by the method described in the above embodiment. Based on the detector output SG output from the light source detector 24d as a detection result, the microcomputer 24e sends a control signal to the speaker volume balance adjusting unit 24f, and the speaker volume balance adjusting unit 24f responds to the control signal by the speaker drive unit 24g. Is adjusted to adjust the volume balance of the speaker SP.

  By using the light source detector 24d, the direction (position, coordinates) of the light source LED (remote control device 50) is based on the optical signal LS from the light source LED of the remote control device 50 as a function that the conventional human detection sensor does not have. ) Can be automatically detected. Accordingly, the direction of the remote control device 50 can be instantaneously determined and detected in accordance with the operation of the remote control device 50, as compared with the conventional human detection sensor system in which the sensor scans the entire room. Further, by using the light source detector 24d, the volume balance of the speaker can be adjusted at a timing intended by the operator of the remote control device 50, compared with the case where the stereo sound device 24 (main body portion 24mb) detects a person. Is possible.

  A conventional stereo sound device having a speaker volume balance adjustment function adjusts the speaker volume balance by placing an adjustment microphone at a position where an operator normally sits. On the other hand, in the present embodiment using the remote control device 50, the speaker volume balance can be adjusted instantaneously using the normally used remote control device 50. Further, by using the remote control device 50, it is possible to adjust the speaker volume balance quickly and accurately at the timing intended by the operator of the remote control device 50, compared to the case where the main body 24mb detects a person. Become. That is, it is possible to set the volume balance of the speaker according to the user's situation.

  As described above, according to the electronic devices according to the sixth to ninth embodiments, the light source detectors 21d, 22d, 23d, and 24d (light source) are transmitted by actively transmitting the optical signal LS from the remote control device 50. The direction or position of the remote control device 50 can be detected by the direction detector 1 or the light source position detection device 2). With this configuration, it is not necessary to scan a person, which is essential for a conventional human detection sensor, and quick and efficient remote control is possible. That is, it becomes possible to perform complicated processing easily and accurately. Further, the conventional remote control function can be used as it is.

It is the see-through | perspective side view which looked at the main structure of the light source direction detector which concerns on Embodiment 1 of this invention seeing through from the side surface of the light receiving element. It is explanatory drawing explaining the optical signal detection value of the light source direction detector which concerns on Embodiment 1 of this invention, (A) is explanatory drawing which shows the arrangement | positioning state of a light receiving element, and a connection relationship with an arithmetic processing part, (B ) Shows the relative value of the first optical signal detection value of the first light receiving element and the second optical signal detection value of the second light receiving element when receiving the optical signal from the light source arranged at the deflection angle θ = 45 degrees. The graph, (C) shows the first optical signal detection value of the first light receiving element and the second optical signal detection value of the second light receiving element when the optical signal from the light source arranged at the deflection angle θ = 0 degree is received. A graph showing a relative value, (D) is a first optical signal detection value of the first light receiving element and a second of the second light receiving element when receiving an optical signal from a light source arranged at a deviation angle θ = −45 degrees. It is a graph which shows the relative value of an optical signal detection value. It is explanatory drawing explaining the relationship between the calculation process value as a result of calculating the optical signal detection value of the light source direction detector which concerns on Embodiment 1 of this invention, and the deflection angle (theta). It is explanatory drawing explaining the block structure which calculates | requires arrangement | positioning and the light source direction of the light receiving element in the light source direction detector which concerns on Embodiment 2 of this invention. It is explanatory drawing explaining the block structure which calculates | requires arrangement | positioning and the light source direction of the light receiving element in the light source direction detector which concerns on Embodiment 3 of this invention. It is explanatory drawing explaining schematic structure of the light source position detection apparatus which concerns on Embodiment 4 of this invention. It is explanatory drawing explaining schematic structure of the light source position detection apparatus which concerns on Embodiment 5 of this invention. It is explanatory drawing explaining the application condition of the light source direction detector in the air conditioner which concerns on Embodiment 6 of this invention. It is explanatory drawing explaining the application condition of the several light source direction detector in the air conditioner which concerns on Embodiment 6 of this invention. It is explanatory drawing explaining the control aspect of the louver in the air conditioner which concerns on Embodiment 6 of this invention. It is explanatory drawing explaining the application condition of the light source direction detector in the television receiver which concerns on Embodiment 7 of this invention. It is explanatory drawing explaining the control aspect of the screen direction in the television receiver which concerns on Embodiment 7 of this invention. It is explanatory drawing explaining the application condition of the light source direction detector in the television receiver which concerns on Embodiment 8 of this invention. It is explanatory drawing explaining the control aspect corresponding to the display content in the television receiver which concerns on Embodiment 8 of this invention. It is explanatory drawing explaining the application condition of the light source direction detector in the stereophonic audio equipment concerning Embodiment 9 of this invention. It is explanatory drawing explaining the control aspect of the speaker volume balance in the stereophonic audio equipment concerning Embodiment 9 of this invention. It is the see-through | perspective side view which looked at schematic structure of the conventional light angle sensor from the side of the light receiving element. It is explanatory drawing explaining the operation state which detects the optical signal from the light source by the conventional light angle sensor. It is explanatory drawing explaining the problem in the case of detecting the optical signal from the light source by the conventional optical angle sensor. It is explanatory drawing explaining the state of the light receiving element which made the chip area large with respect to the light receiving element in the conventional optical angle sensor, (A) shows the chip layout of the conventional light receiving element, (B) shows chip area. The chip layout of the enlarged light receiving element is shown. It is explanatory drawing explaining the relationship between the conventional light angle sensor and the light source in a spherical coordinate system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b Light source direction detector 2 Light source position detection apparatus 11 Lens 12 Resin sealing part 13 Arithmetic processing part 15 Switching part 21 Indoor unit 22, 23 Television receiver 22mb, 23mb Main body part 23s Display screen (superimposed image liquid crystal Display section)
24 stereo sound equipment 24 mb main body 50, 50a, 50b remote control device LD optical signal detection value LD1 first optical signal detection value LD2 second optical signal detection value LD3 third optical signal detection value LD4 fourth optical signal detection value LD13 light Signal detection value LD24 Optical signal detection value LDa Optical signal detection value LDb Optical signal detection value LED light source LS, LSa, LSb, LSc, LSd Optical signal PD Light receiving element PD1 First light receiving element PD2 Second light receiving element PD3 Third light receiving element PD4 4th light receiving element SG detector output SVout calculation processing value

Claims (11)

A light source direction detector that receives a light signal from a light source and detects the direction of the light source,
A plurality of light receiving elements arranged separately from each other;
A lens that collects an optical signal from a light source onto the light receiving element;
A light source direction detector comprising: an arithmetic processing unit that performs arithmetic processing on an optical signal detection value detected by the light receiving element.   The plurality of light receiving elements are a first light receiving element and a second light receiving element arranged separately in a first axis direction, and the arithmetic processing unit is configured to detect a first optical signal detection value detected by the first light receiving element. The light source direction detector according to claim 1, wherein the second light signal detection value detected by the second light receiving element is calculated.   The plurality of light receiving elements correspond to the first light receiving element and the second light receiving element arranged separately in the first axis direction, and in the second axis direction intersecting the first axis direction. The light source direction detector according to claim 1, wherein the third light receiving elements and the fourth light receiving elements arranged corresponding to the second light receiving elements are arranged in a matrix.   The arithmetic processing unit includes a sum of a first optical signal detection value detected by the first light receiving element and a third optical signal detection value detected by the third light receiving element, and a second light detected by the second light receiving element. The light source direction detector according to claim 3, wherein the light source direction detector is configured to perform arithmetic processing on a signal detection value and a sum of the fourth optical signal detection values detected by the fourth light receiving element.   The sum of the first optical signal detection value detected by the first light receiving element and the third optical signal detection value detected by the third light receiving element, the second optical signal detection value detected by the second light receiving element, and the first Calculation processing is performed on the sum of the fourth optical signal detection values detected by the four light receiving elements, or the first optical signal detection value detected by the first light receiving element and the second detected by the second light receiving element. Switching between calculation processing of the sum of the optical signal detection values and the sum of the third optical signal detection value detected by the third light receiving element and the fourth optical signal detection value detected by the fourth light receiving element The light source direction detector according to claim 3, further comprising a signal switching unit that performs the signal switching. A light source position detection device that detects a light source direction and a distance to the light source using at least two light source direction detectors,
The light source direction detector is the light source direction detector according to any one of claims 1 to 5.   An electronic apparatus comprising the light source direction detector according to any one of claims 1 to 5 or the light source position detection device according to claim 6. The electronic apparatus is an air conditioner including an indoor unit having a louver controlled based on an optical signal from a light source included in a remote control device,
The indoor unit includes the light source direction detector or the light source position detection device,
The configuration according to claim 7, wherein the directional direction of the louver is controlled based on the direction or distance of the remote control device with respect to the indoor unit obtained by the light source direction detector or the light source position detection device. The electronic device described. The electronic device is a television receiver whose screen direction is adjusted by a screen direction adjusting unit controlled based on an optical signal from a light source provided in a remote control device,
The main body unit includes the light source direction detector or the light source position detection device,
8. The screen direction adjustment unit is controlled based on a direction or a distance of the remote control device with respect to the main body obtained by the light source direction detector or the light source position detection device. The electronic device described. The electronic device is a television receiver including a superimposed image liquid crystal display unit having different display contents as a visual target in a left direction or a right direction with respect to a screen,
The main body unit includes the light source direction detector or the light source position detection device,
When the direction of the remote control device with respect to the main body determined by the light source direction detector or the light source position detection device is the left direction, the control of the function corresponding to the display content in the left direction is executed, 8. The electronic apparatus according to claim 7, wherein the electronic device is configured to execute control of a function corresponding to display content in the right direction. The electronic device is a stereo sound device including a main body that adjusts a volume of a speaker controlled based on an optical signal from a light source included in a remote control device,
The main body unit includes the light source direction detector or the light source position detection device,
The volume of the speaker is controlled based on the direction or distance of the remote control device with respect to the main body determined by the light source direction detector or the light source position detection device. Electronic equipment.

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