JP2007271350A - Reference plane setting method and viewing angle measurement method for flat display type display - Google Patents

Abstract

A flat display display standard in which a display display surface can be easily arranged on a reference plane without being affected by the size and shape of the flat display display and mounted components, and characteristics can be measured at a specified or arbitrary position. To provide a plane setting method and a viewing angle measurement method.
A vertical swing shaft 16 at the center of a reference plane and a horizontal swing shaft 20 on a reference plane orthogonal to the vertical swing shaft 16 are provided, and a distance measurement away from a display surface 102 is provided. The distance between any three points on the display surface 102 is measured by the device 22, the tilt angle is calculated from the distance of each point, and the flat display 100 is swung around the vertical swing shaft 16 and the horizontal swing shaft 20. The flat display display 100 is repeatedly moved from the re-measurement of the distance of the three points until the flat display display 100 is re-oscillated around the vertical swing shaft 16 and the horizontal swing shaft 20 by moving to the reference plane. A method for setting a reference plane for a flat display type display in which a is placed on a reference plane.
[Selection] Figure 1

Description

  The present invention relates to a reference plane setting method and a viewing angle measurement method for a flat display type display for measuring characteristics of the flat display type display.

  As a method for measuring the characteristics of a flat display type display, the display is mounted on a measurement table, and an image pickup unit for picking up an image of the display surface of the display is used. Alternatively, there is one in which the output of the imaging unit is displayed by the display unit while rotating the imaging unit (see, for example, Patent Document 1).

  In such a measuring method, a small naked display can be placed on a measuring table, but a large-sized display (some of which exceeds 100 kg) that has been developed recently is laid on the measuring table. It is difficult to place and measure because of the need to maintain flatness and a certain distance from the imaging means.

  In addition, when the flat display display is in the form of shipment, various electrical components are already mounted on the back surface, which makes the shape complicated, and when it is placed on the measurement table, it becomes inclined and the reference plane is set. Is difficult, that is, measurement is naturally difficult. In particular, when measuring the viewing angle characteristics of a liquid crystal display, the angle between the imaging means and the surface of the liquid crystal display must be set accurately, and it is necessary to change the angle and execute it multiple times. If the reference position of the display cannot be set, the position of the imaging means cannot be set.

As the flat display type display that requires measurement of the characteristics of the display in the product state, there are not only a liquid crystal but also a plasma display or a projection display.
In addition, there is an increasing demand for improvement in measurement accuracy, and a slight misalignment of position and angle serving as a reference becomes a large shift when the measurement angle is large. Therefore, in a large display, a manual measurement in which a mirror is mounted on the display and the surface is reflected by the reflection of the display is unavoidable. However, a large amount of labor and time are required, which is a great obstacle to inspection.

Japanese Patent Laid-Open No. 7-35645

  The present invention has been made in view of the above-mentioned problems, and the problem is that it can be easily recognized automatically without being affected by the size and shape of the flat display display and mounted components, and can be designated or arbitrarily specified. It is an object of the present invention to provide a reference plane setting method and a viewing angle measurement method for a flat display type display capable of measuring the characteristics at the positions.

The above-mentioned subject concerning the present invention is attained by the following composition.
(1) A method for setting a reference plane of a flat display type display in which a flat display type display is arranged on a reference plane, wherein a vertical swing axis passing through a central portion of the reference plane is set, and the vertical swing axis is set as the vertical swing axis. An orthogonal horizontal swing axis is set at the center of the reference plane, the display is held by the reference plane setting holding means in the vicinity of the reference plane, and is separated from the display surface of the display by an arbitrary distance. Measure the distance of any three points on the display surface of the display with a measuring device, calculate the tilt angle and the distance between the display and the reference plane from the distance of each point, move the holding means to move the reference The reference plane is reduced by reducing the distance from the surface and swinging the display around the vertical swing shaft and the horizontal swing shaft around the intersection of the vertical swing shaft and the horizontal swing shaft. With A plane display in which the display is arranged on the reference plane by repeating from the re-measurement of the distance of the three points to the re-swing of the display around the vertical swing axis and the horizontal swing axis. Method for setting the reference plane of a flat panel display.

  As described above, the vertical swing axis is provided on the reference plane, the horizontal swing axis is provided on the reference plane perpendicular to the vertical swing axis, and the flat display is disposed near the reference plane. Then, the distance measuring device calculates the tilt angle and the distance to the reference surface from the measurement distances of three arbitrary points on the display display surface. Then, the display is swung around the vertical swing axis and the horizontal swing axis, and the display is moved by a distance away from the reference plane to approach the reference plane. The display is arranged on the reference plane by repeating the process until the display is re-oscillated around the vertical and horizontal oscillation axes. Thereby, even if it is a large sized flat display type display, it can measure easily and it can measure without being influenced by a shape or mounting components. In addition, it is possible to easily recognize the characteristic automatically and to measure the characteristic at a designated or arbitrary position.

(2) A method for measuring a viewing angle of a flat display type display, wherein a vertical swing axis passing through a central portion of the reference plane is set, and a horizontal swing axis perpendicular to the vertical swing axis is set as the reference Set at the center of the surface, hold the display in the vicinity of the reference surface with a reference plane setting holding means, and by using a distance measuring device spaced an arbitrary distance from the display surface of the display, the display surface of the display The distance between the three points is measured, the tilt angle and the distance between the display and the reference plane are calculated from the distance of each point, the holding means is moved to reduce the distance from the reference plane, and the vertical direction The display is swung around the vertical rocking axis and the horizontal rocking axis around the intersection of the rocking axis and the horizontal rocking axis so as to be parallel to the reference plane. From the re-measurement of distance, The display is placed on the reference plane by repeating the vertical swing axis and the re-swing of the display around the horizontal swing axis, the distance measuring device is replaced with viewing angle observation means, and the vertical swing is performed. A method for measuring a viewing angle of a flat display type display, wherein the viewing angle is adjusted and specified by swinging the display around a moving axis and the horizontal swing axis.

  In this way, by repeating from the re-measurement of the distance between the three points between the flat display display and the distance measuring device to the re-rocking of the flat display display around the vertical swing axis and the horizontal swing axis, When the display is placed on the reference plane and the distance measuring device is replaced with the viewing angle observation means, the viewing angle observation means can be moved only by swinging the display around the vertical swing axis and the horizontal swing axis. The viewing angle is adjusted and specified. Thereby, even if it is a large sized flat display type display, it can measure easily and it can measure without being influenced by a shape or mounting components. In addition, it is possible to easily recognize the characteristic automatically and to measure the characteristic at a designated or arbitrary position.

  According to the present invention, a flat display display standard that can be easily and automatically recognized without being affected by the size and shape of the flat display display and mounted components, and capable of measuring characteristics at a specified or arbitrary position. A plane setting method and a viewing angle measurement method can be provided.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an external perspective view of a characteristic measuring apparatus used for a reference plane setting method for a flat display according to an embodiment of the present invention.

  In the figure, a characteristic measuring apparatus (also referred to as a display measurement stage) 10 used in a reference plane measuring method for a flat display type display 100 is a vertical axis swing having a vertical swing axis 16 on a base 12. The moving means 14, the horizontal axis oscillating means 18 provided with the horizontal oscillating shaft 20, the distance measuring device 22, and the distance measuring device moving means 24 are assembled. The vertical rocking shaft 16 and the horizontal rocking shaft 20 form a reference plane.

  In the vertical axis oscillating means 14, a vertical oscillating shaft 16 is assembled to the tip of an arm 26 which is a part of a horizontal axis oscillating means 18 described later. A support plate 28 is pivotally supported by the unit so as to be rotatable and can hold an arbitrary position. A display support shaft 30 is fixed to the support plate 28, and the flat display display 100 is held on the display support shaft 30. A clamp 32 which is a holding means is assembled.

  The vertical oscillating shaft 16 may be configured to be coupled to a driving means including a step motor (not shown). The driving means automatically rotates the support plate 28 by a control circuit (not shown). Configuration is also possible.

  The display support shaft 30 is fixed to the support plate 28 by shifting a predetermined distance from the vertical swing shaft 16 onto the crank so that the thickness of the flat display 100 including at least the clamp 32 is covered. It rotates together with the support plate 28.

  The clamp 32 is formed in a U shape that holds the flat display type display 100 and is assembled so as to be movable in the axial direction of the display support shaft 30. Although not shown, the clamp 32 can be expanded according to the outer shape of the flat display type display 100, and the distance from the display support shaft 30 can be changed. Since the flat display type display 100 is held with a space on the back side of the flat display type display 100, even if the flat display type display 100 has a different external shape on the back side, the flat display type display 100 can be reliably held and shipped. Even if various electrical components are mounted on the back surface of a certain flat display type display 100, the vertical display is in contact with the display surface (shown in FIG. 2) 102 of the flat display type display 100 without being affected by the electrical components. A center line of the direction swing shaft 16 can be arranged.

  In addition, since the clamp 32 is assembled so as to be movable in the axial direction of the display support shaft 30, even if the flat display 100 is large, it is moved according to its outer shape (particularly in the height direction). In this way, it is possible to hold a variety of flat display displays 100.

  In this way, the vertical axis swing means 14 is a flat display in which the display support shaft 30 is rotated via the support plate 28 and held by the clamp 32 when the vertical swing shaft 16 is rotated. The mold display 100 is rotated in the α direction around the center line of the vertical swing shaft 16 in contact with the display surface 102.

  On the other hand, in the horizontal axis direction swinging means 18, a support column 25 is disposed on the side of the frame-shaped base 12, and the horizontal swing shaft 20 disposed at the upper position of the support column 25 is L. A base end portion of an arm 26, which is a plate member formed in a letter shape, is pivotally supported so as to be rotatable and hold an arbitrary position. The center line of the horizontal swing shaft 20 is disposed orthogonal to the center line of the vertical swing shaft 16 and is in contact with the display surface 102 at substantially the center of the flat display type display 100. In addition, the horizontal swing shaft 20 can be configured to be coupled to a driving means having a built-in step motor (not shown), and the driving means is configured to rotate the arm 26 by a control circuit (not shown). can do.

  In the horizontal axis direction swinging means 18, the arm 26 is rotated around the horizontal direction swinging axis 20, and the flat display type display 100 is moved in the horizontal direction on the display surface 102 through the entire vertical axis direction swinging means 14. It is rotated in the β direction around the center line of the swing shaft 20.

  The distance measuring device moving means 24 includes a first horizontal moving unit 36, a second horizontal moving unit 38, and a vertical moving unit 40, and holds a support plate 34 on which the distance measuring device 22 is placed. is doing. The distance measuring device 22 includes laser light irradiation means that functions as a distance meter sensor, and is fixed to the upper surface of the support plate 34. The distance measuring device 22 irradiates the flat display 100 with laser light and measures the distance based on the reflected laser light.

  The support plate 34 is supported so as to be movable in the Z direction (perpendicular to the base 12) in the figure by a configuration such as a ball screw 54 rotatably accommodated in the tower 52 of the vertical direction moving unit 40. The tower 52 is supported so that its base portion can be moved in the Y direction (the same direction as the horizontal swing shaft 20) in the figure by a configuration such as a ball screw in the frame 46 of the second horizontal direction moving portion 38. . The frame body 46 is supported in the base 12 so as to be movable in the X direction (direction perpendicular to the Y direction) in the figure by the configuration of a ball screw or the like of the first horizontal movement unit 36.

  In the present embodiment, the first horizontal moving portion 36 of the distance measuring device moving means 24 adopts a ball screw configuration, and a ball screw 42 that is rotatably supported by the base 12 and a ball screw 42. The nut member 44 is screwed, and the nut member 44 is fixed to the frame 46 of the second horizontal movement member 38. When the ball screw 42 is rotated, the first horizontal direction moving portion 36 moves the nut member 44 in the X direction in the drawing together with the frame body 46.

  The second horizontal moving portion 38 also adopts a ball screw configuration, and includes a ball screw 48 that is rotatably accommodated in the frame 46 and a nut member 50 that is screwed into the ball screw 48. A member 50 is fixed to the tower 52. Since the ball screw 48 is disposed orthogonally to the ball screw 42 of the first horizontal movement unit 36 in the horizontal direction, the second horizontal movement unit 38 is rotated by the nut member 50. Is moved together with the tower 52 in the Y direction in the figure.

Further, the vertical moving portion 40 also employs a ball screw configuration, and includes a ball screw 54 that is rotatably accommodated in the tower 52, and a support plate 34 that is screwed into the ball screw 54 and functions as a nut member. Consists of. In the horizontal direction moving part 40, the ball screw 54 is arranged perpendicularly to the ball screw 42 of the first horizontal direction moving part 36 and the ball screw 48 of the second horizontal direction moving part 38 in the vertical direction, and the ball screw 54 is rotated. Thus, the support plate 34 is moved in the Z direction in the figure.
The first horizontal moving unit 36, the second horizontal moving unit 38, and the vertical moving unit 40 are all coupled to a driving source (not shown) that is electrically connected to the control circuit. Can do. With this configuration, it is possible to make fine adjustments by introducing computer control.

Next, regarding the present embodiment, a reference plane setting method and a viewing angle measurement method of the flat display type display according to the present invention by the characteristic measurement apparatus 10 will be described with reference to the drawings.
FIG. 2 is a main part schematic perspective view showing the relationship between the display surface of the flat display type display in the characteristic measuring apparatus 10 and the distance measuring device.

  As shown in FIG. 2, in the characteristic measuring apparatus 10, the flat display type display 100 is clamped and fixed to the clamp 32. The distance between the ideal plane including the center line of the horizontal swing shaft 20 and the center line of the vertical swing shaft 16 and the distance measuring device 22 is set in advance, and the ball of the first horizontal moving unit 36 is set. The screw 42 is rotated to move the tower 52 in the X direction via the nut member 44, and the distance measuring device 22 can be arranged at this preset X direction position.

  When the distance measuring device 22 is disposed at an appropriate position from the flat display type display 100, measurement of the outer shape of the flat display type display 100 is started. First, the distance measuring device 22 is moved downward by rotating the ball screw 54 of the vertical direction moving unit 40. At this time, if the laser light of the distance measuring device 22 irradiates the lower outer frame edge portion beyond the display surface 102 of the flat display type display 100, the brightness of the reflected laser light changes, and the lower The boundary line position of the outer frame on the side is detected.

  Then, by rotating the ball screw 48 of the second horizontal movement unit 38 from that position, the distance measuring device 22 is horizontally moved to the left, and the boundary line position of the left outer frame of the flat display 100 is displayed. Then, the distance measuring device 22 is horizontally moved to the right, and the boundary line position of the right outer frame of the flat display type display 100 is detected.

  Next, by rotating the ball screw 54 of the vertical moving unit 40, the distance measuring device 22 is vertically moved upward, and the boundary line position of the upper outer frame of the flat display type display 100 is detected. Thereby, the outer dimension of the flat display type display 100 is calculated by measuring the length and height of the base. The distance measuring device 22 is moved upward and downward when horizontally moved to detect the boundary line position of the outer frame, and is moved to the left and right when vertically moved. Detect the border line position of the frame. Thereby, when the flat display type display 100 is circular or elliptical, the outer periphery of the flat display type display 100 can be calculated by plotting the outer periphery with a plurality of points and calculating the data.

  After calculating the external dimensions of the flat display 100, the characteristic measuring apparatus 10 moves the distance measuring device 22 in the Y and Z directions by the distance measuring device moving means 24 without starting the flat display 100. By doing so, the distance measurement to three points of arbitrary points A, B and C on the display surface 102 of the flat display type display 100 is performed. Since the distance data from each of the points A, B, and C corresponds to the amount of deviation from the reference surface of the display surface 102 in the flat display type display 100, the control circuit determines the deviation from the distance between the points A, B, and C. A tilt angle and a distance Δx between the reference plane and the flat display are calculated.

The following plane equation is used to calculate the tilt angle and the distance between the reference plane and the flat display.
Plane equation passing through three points A (x1, y1, z1), B (x2, y2, z2), C (x3, y3, z3) lx + my + nz + d = 0
Is
l = ((y2-y1) * (z3-z1))-((z2-z1) * (y3-y1))
m = ((z2-z1) * (x3-x1))-((x2-x1) * (z3-z1))
n = ((x2-x1) * (y3-y1))-((y2-y1) * (x3-x1))
d = 0 − ((x1 × l) + (y1 × m) + (z1 × n))
The angles Δα and Δβ formed by the normal vector (l, m, n) of the reference plane and the xyz coordinates are Δα = tan ⁻¹ (m / l)
Δβ = cos ⁻¹ (n / √ (l ² + m ² + n ² ))

  As described above, when the tilt angle is determined, the distance from the display support shaft 30 is changed by the clamp 32 while irradiating the flat display 100 with laser light from the distance measuring device 22, and the flat display 100 is moved to the vertical axis. It is moved in the α direction by the direction swing means 14 and moved in the β direction by the horizontal axis direction swing means 18. Then, the distance measurement from each of the points A, B, and C is executed again, and the tilt angle is calculated each time.

  The characteristic measuring apparatus 10 repeats the correction operation by swinging the flat display type display 100 via the vertical axis direction swing means 14 and the horizontal axis direction swing means 18 based on the calculated tilt angle. The distance measurement values from the points A, B, and C are made the same, and the distance between the display surface 102 of the flat display type display 100 and the YZ plane of the distance measuring device 22 is made constant.

  As described above, the distance measurement values from the points A, B, and C are adjusted to be the same, and finally the center line of the horizontal swing shaft 20 and the center line of the vertical swing shaft 16 are included. The display surface 102 of the flat display type display 100 includes the center line of the horizontal swing shaft 20 and the center line of the vertical swing shaft 16 by adjusting the distance between the ideal flat surface and the distance measuring device 22. Match to the ideal reference plane.

  As described above, the vertical swing shaft 16 is provided at the center of the reference plane, and the horizontal swing shaft 20 orthogonal to the vertical swing shaft 16 is provided on the reference plane. The tilt angle, the distance between the flat display type display and the reference plane are calculated from the measurement distances of three arbitrary points. Then, the flat display display 100 is swung around the vertical swing shaft 16 and the horizontal swing shaft 20 so as to approach the reference plane, and from the re-measurement of the distance of three points, the vertical swing shaft 16 and the horizontal By repeating the flat display 100 around the direction swing axis 20 until the re-swing, the flat display 100 is arranged on the reference plane. Thereby, even if it is a large sized flat display type display, it can measure easily and it can measure without being influenced by a shape or mounting components. In addition, it is possible to easily recognize the characteristic automatically and to measure the characteristic at a designated or arbitrary position.

FIG. 3 is an external perspective view showing another configuration of the characteristic measuring apparatus viewed from an oblique front.
As shown in FIG. 3, here, after calculating the tilt angle and arranging the flat display 100 on the reference plane, the distance measuring device 22 shown in FIG. Perform the measurement. The viewing angle observation means 62 is, for example, a color luminance meter or a two-dimensional color luminance meter, and is a flat display type by observing a boundary range in which an obstacle such as a color change appears in the image of the activated flat display display 100. Used to measure the effective viewing angle of the display 100. In this case, after the flat display type display 100 is arranged on the reference plane, the effective viewing angle is sequentially changed by swinging the flat display type display 100 via the vertical axis direction swing means 14 and the horizontal axis direction swing means 16. The viewing angle characteristics can be observed without moving the viewing angle observation means 62.

  With this configuration, the vertical swing shaft 16 is provided at the center of the reference plane, the horizontal swing shaft 20 orthogonal to the vertical swing shaft 16 is provided on the reference plane, and the distance measuring device 22 is provided. Thus, the tilt angle, the distance between the flat display type display and the reference plane are calculated from the measurement distances of any three points on the display surface 102. Then, the flat display display 100 is swung around the vertical swing shaft 16 and the horizontal swing shaft 20 so as to approach the reference plane, and from the re-measurement of the distance of three points, the vertical swing shaft 16 and the horizontal The flat display display 100 is repeatedly placed around the direction swing axis 20 until the flat display display 100 is placed on the reference plane, and the viewing angle observation unit 62 is used to move the vertical display display 100 and the horizontal swing display 16 horizontally. The effective viewing angle is adjusted and specified by swinging the flat display 100 around the direction swing axis 20. Thereby, even if it is a large sized flat display type display, it can measure easily and it can measure without being influenced by a shape or mounting components. In addition, it is possible to easily recognize the characteristic automatically and to measure the characteristic at a designated or arbitrary position.

It is a schematic perspective view of the characteristic measuring apparatus used for the reference plane setting method of the flat display type display by embodiment of this invention. It is a principal part external appearance perspective view which shows the relationship between the display surface of the flat display type display in the characteristic measuring apparatus shown in FIG. 1, and a distance measuring device. It is the external appearance perspective view seen from the diagonal front which shows the other structure of a characteristic measuring apparatus.

Explanation of symbols

10 Characteristic measurement device (stage for display measurement)
16 Vertical oscillating shaft 20 Horizontal oscillating shaft 22 Distance measuring device 62 Viewing angle observation means 100 Flat display type display 102 Display surface

Claims (2)

A flat plane display type reference plane setting method for arranging a flat display type display on a reference plane,
Set a vertical swing axis that passes through the center of the reference plane,
A horizontal swing axis perpendicular to the vertical swing axis is set at the center of the reference plane;
Holding the display near the reference plane with a reference plane setting holding means,
Measure the distance of any three points on the display surface of the display with a distance measuring device that is separated from the display surface of the display by an arbitrary distance;
Calculate the tilt angle and the distance between the display and the reference plane from the distance of each point,
Move the holding means to reduce the distance from the reference plane,
Oscillating the display around the vertical oscillating axis and the horizontal oscillating axis around the intersection of the vertical oscillating axis and the horizontal oscillating axis so as to be parallel to the reference plane;
A reference of a flat display type in which the display is arranged on the reference plane by repeating the re-measurement of the distance between the three points and the re-swing of the display around the vertical swing axis and the horizontal swing axis. Plane setting method. A method of measuring a viewing angle of a flat display type display,
Set a vertical swing axis that passes through the center of the reference plane,
A horizontal swing axis perpendicular to the vertical swing axis is set at the center of the reference plane;
Holding the display near the reference plane with a reference plane setting holding means,
Measure the distance of any three points on the display surface of the display with a distance measuring device that is separated from the display surface of the display by an arbitrary distance;
Calculate the tilt angle and the distance between the display and the reference plane from the distance of each point,
Move the holding means to reduce the distance from the reference plane,
Oscillating the display around the vertical oscillating axis and the horizontal oscillating axis around the intersection of the vertical oscillating axis and the horizontal oscillating axis so as to be parallel to the reference plane;
Repeating from the re-measurement of the distance of the three points to the re-rocking of the display around the vertical swing axis and the horizontal swing axis, the display is arranged on the reference plane,
A method for measuring a viewing angle of a flat display type, wherein the distance measuring device is replaced with a viewing angle observation means, and the display is swung around the vertical swing axis and the horizontal swing axis to adjust and specify the viewing angle.

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