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WO2013001590A1 - Dispositif d'affichage monté sur tête et procédé et programme de commande utilisés dans le dispositif d'affichage monté sur tête - Google Patents

Dispositif d'affichage monté sur tête et procédé et programme de commande utilisés dans le dispositif d'affichage monté sur tête Download PDF

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Publication number
WO2013001590A1
WO2013001590A1 PCT/JP2011/064670 JP2011064670W WO2013001590A1 WO 2013001590 A1 WO2013001590 A1 WO 2013001590A1 JP 2011064670 W JP2011064670 W JP 2011064670W WO 2013001590 A1 WO2013001590 A1 WO 2013001590A1
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WO
WIPO (PCT)
Prior art keywords
light
detection
abnormality determination
light source
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/064670
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English (en)
Japanese (ja)
Inventor
実 吉岡
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Pioneer Corp
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Pioneer Corp
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Filing date
Publication date
Application filed by Pioneer Corp filed Critical Pioneer Corp
Priority to PCT/JP2011/064670 priority Critical patent/WO2013001590A1/fr
Publication of WO2013001590A1 publication Critical patent/WO2013001590A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • H04N3/08—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving reflector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/344—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/365—Image reproducers using digital micromirror devices [DMD]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems

Definitions

  • the present invention relates to the technical field of head mounted displays.
  • Patent Document 1 laser light from a laser light source is controlled to a constant light amount by an APC circuit in accordance with a first monitor output output from a first front monitor photodetector, and a second front monitor is used.
  • APC circuit APC circuit
  • the power of the laser driving circuit is shut off to stop the laser light source from emitting the laser light. Yes.
  • the first front monitor photodetector is limited to an APC (Auto Power Control), and the second front monitor photodetector is an APC circuit or the like.
  • the application was limited to detecting abnormalities. Therefore, it is difficult to appropriately cope with a case where an abnormality occurs in one or both of the first front monitor photodetector and the second front monitor photodetector.
  • the present invention relates to a head-mounted display capable of appropriately performing abnormality determination using two detection means for detecting light from a light source and performing control according to the abnormality, a control method and a program performed on the head-mounted display.
  • the issue is to provide.
  • a head mounted display comprising: a light source that emits light for drawing an image to be recognized by a user; and an optical system that includes an optical element that guides the light to the eyes of the user.
  • first detection means for directly detecting light emitted from the light source without passing through the optical system
  • second detection means for detecting light emitted from the light source via the optical system
  • An abnormality determination unit that performs abnormality determination based on a combination of detection results of the first detection unit and the second detection unit, and controls irradiation of the light from the light source based on a determination result of the abnormality determination unit. Control means.
  • the light source is emitted from the light source that emits light for drawing an image to be recognized by the user, an optical system that guides the light to the eyes of the user, and the light source.
  • Control performed in a head mounted display having first detection means for directly detecting light without going through the optical system, and second detection means for detecting light emitted from the light source through the optical system
  • the method includes: an abnormality determination step for performing abnormality determination based on a combination of detection results of the first detection unit and the second detection unit; and a method for determining whether the light source from the light source is based on the determination result in the abnormality determination step. And a control process for controlling light irradiation.
  • the light source is emitted from a light source that emits light for drawing an image to be recognized by a user, an optical system that guides the light to the user's eyes, and the light source.
  • a head mount having a computer and first detection means for directly detecting light without going through the optical system, and second detection means for detecting light emitted from the light source through the optical system
  • the program executed on the display is based on a determination result of the abnormality determination unit, an abnormality determination unit that performs abnormality determination based on a combination of detection results of the first detection unit and the second detection unit. , And functioning as control means for controlling irradiation of the light from the light source.
  • a head mounted display comprising: a light source that emits light for drawing an image to be recognized by a user; and an optical system that includes an optical element that guides the light to the user's eyes.
  • the first detection means and the second detection means for detecting the light amount emitted from the light source via the optical system, and the light emitted from the light source based on the light amount detected by the first detection means.
  • the structure of the head mounted display which concerns on a present Example is shown.
  • the figure for demonstrating the abnormality determination method based on a present Example concretely is shown.
  • the structure of the head mounted display which concerns on a modification is shown.
  • a head-mounted display having a light source that emits light for drawing an image to be recognized by a user and an optical system that includes an optical element that guides the light to the eyes of the user.
  • the first detection means for directly detecting the light emitted from the light source without going through the optical system
  • the second detection means for detecting the light emitted from the light source through the optical system
  • the first An abnormality determination unit that performs abnormality determination based on a combination of detection results of the detection unit and the second detection unit, and a control that controls irradiation of the light from the light source based on the determination result of the abnormality determination unit Means.
  • the above head mounted display displays an image by guiding the light from the light source to the user's eyes via the optical system.
  • the first detection means directly detects the light emitted from the light source without passing through the optical system
  • the second detection means detects the light emitted from the light source via the optical system.
  • the abnormality determination unit performs an abnormality determination on the components in the head mounted display based on a combination of detection results of the first detection unit and the second detection unit.
  • a control means controls irradiation of the light from a light source based on the determination result of an abnormality determination means. For example, the control unit performs control to stop the irradiation of light from the light source when the abnormality determination unit determines that there is an abnormality.
  • the abnormality determination can be appropriately performed based on the detection results of both the first detection means and the second detection means.
  • the light source is placed in a predetermined area outside the image drawing area by the head-mounted display after the head-mounted display is turned on until the image is drawn.
  • Irradiation control means for performing a test operation for irradiating the light wherein the abnormality determination means detects the first detection means and the second detection means when the irradiation control means is performing the test operation. The abnormality determination is performed based on the result. Thereby, when there is an abnormality when the power is turned on, it is possible to appropriately suppress the light from being irradiated to the user's eyes.
  • the light source has two or more light sources that emit two or more lights having different wavelengths
  • the abnormality determination means is provided for each of the two or more light sources.
  • An abnormality is determined for the control unit, and the control unit stops the light irradiation from the light source determined by the abnormality determination unit to be abnormal among the two or more light sources, and the abnormality is detected among the two or more light sources.
  • An abnormal state is displayed by irradiating light from a light source determined by the determination means as not abnormal. Thereby, it is possible to appropriately transmit the abnormal state to the user while suppressing the light from the light source having the abnormality from being applied to the user's eyes.
  • control unit can display the contents of the abnormal state based on a combination of detection results of the first detection unit and the second detection unit.
  • the predetermined area is outside an area where the light can be guided to the eyes of the user.
  • the second detection unit detects the two or more lights emitted from the two or more light sources via the optical system.
  • two or more lights irradiated from two or more light sources can be detected using one second detection means.
  • the second detection unit detects in accordance with the number of light sources emitted from the two or more light sources in synchronization with a control signal for controlling the two or more light sources. Change the level. Thereby, the light from a plurality of light sources can be appropriately detected by one second detection means.
  • the head mounted display further includes an adjusting unit that adjusts the amount of light emitted from the light source based on the amount of light detected by the first detecting unit.
  • the adjustment unit performs so-called APC (Auto Power Control) based on the light amount detected by the first detection unit.
  • the abnormality determination unit is configured to detect an abnormality with respect to the light source, the optical system, the first detection unit, and the second detection unit based on detection results of the first detection unit and the second detection unit. Make a decision. That is, the abnormality determination unit determines abnormality of the light source, the optical system, the first detection unit, and the second detection unit according to the combination of the detection result of the first detection unit and the detection result of the second detection unit. It can be performed.
  • the abnormality determination means can make an abnormality determination for the first detection means and the second detection means based on detection results of the first detection means and the second detection means.
  • a back monitor provided in the light source can be used as the first detecting means.
  • a light source that emits light for drawing an image to be recognized by a user
  • an optical system that includes an optical element that guides the light to the eyes of the user, and light emitted from the light source
  • Control method performed in a head mounted display having first detection means for directly detecting the light emitted from the light source, and second detection means for detecting light emitted from the light source via the optical system Is based on a combination of detection results of the first detection means and the second detection means, an abnormality determination step for performing an abnormality determination, and the light from the light source based on a determination result in the abnormality determination step.
  • a control process for controlling the irradiation of.
  • a light source that emits light for drawing an image to be recognized by a user
  • an optical system that includes an optical element that guides the light to the eyes of the user
  • the light source emits light.
  • a head mount having a computer and first detection means for directly detecting light without going through the optical system, and second detection means for detecting light emitted from the light source through the optical system
  • the program executed on the display is based on a determination result of the abnormality determination unit, an abnormality determination unit that performs abnormality determination based on a combination of detection results of the first detection unit and the second detection unit.
  • a head-mounted display comprising: a light source that emits light for drawing an image to be recognized by a user; and an optical system that includes an optical element that guides the light to the user's eyes.
  • the first detection means and the second detection means for detecting the light amount emitted from the light source via the optical system, and the light emitted from the light source based on the light amount detected by the first detection means.
  • FIG. 1 shows a configuration of a head mounted display 1 according to the present embodiment.
  • a head mounted display (hereinafter referred to as “HMD” as appropriate) 1 mainly includes an image signal input unit 2, a video ASIC 3, a frame memory 4, a ROM 5, a RAM 6, A laser driver ASIC 7, a MEMS control unit 8, a laser light source unit 9, and an abnormality detection circuit 60 are provided.
  • the HMD 1 is configured to be wearable on the user's head, for example, and draws an image on the user's retina by scanning with laser light.
  • the image signal input unit 2 receives an image signal input from the outside and outputs it to the video ASIC 3.
  • the video ASIC 3 is a block that controls the laser driver ASIC 7 and the MEMS control unit 8 based on the image signal input from the image signal input unit 2 and the scanning position information input from the MEMS mirror 10, and the ASIC (Application Specific Integrated Circuit). ).
  • the video ASIC 3 includes a synchronization / image separation unit 31, a bit data conversion unit 32, a light emission pattern conversion unit 33, and a timing controller 34.
  • the synchronization / image separation unit 31 separates the image data displayed on the image display unit and the synchronization signal from the image signal input from the image signal input unit 2 and writes the image data to the frame memory 4.
  • the bit data converter 32 reads the image data written in the frame memory 4 and converts it into bit data.
  • the light emission pattern conversion unit 33 converts the bit data converted by the bit data conversion unit 32 into a signal representing the light emission pattern of each laser.
  • the timing controller 34 controls the operation timing of the synchronization / image separation unit 31 and the bit data conversion unit 32.
  • the timing controller 34 also controls the operation timing of the MEMS control unit 8 described later.
  • the image data separated by the synchronization / image separation unit 31 is written.
  • the ROM 5 stores a control program and data for operating the video ASIC 3. Various data are sequentially read from and written into the RAM 6 as a work memory when the video ASIC 3 operates.
  • the laser driver ASIC 7 is a block that generates a signal for driving a laser diode (LD) provided in a laser light source unit 9 described later, and is configured as an ASIC.
  • the laser driver ASIC 7 includes a red laser driving circuit 71, a blue laser driving circuit 72, and a green laser driving circuit 73.
  • the red laser driving circuit 71 drives the red laser LD1 based on the signal output from the light emission pattern conversion unit 33.
  • the blue laser drive circuit 72 drives the blue laser LD2 based on the signal output from the light emission pattern conversion unit 33.
  • the green laser drive circuit 73 drives the green laser LD3 based on the signal output from the light emission pattern conversion unit 33.
  • the MEMS control unit 8 controls the MEMS mirror 10 based on a signal output from the timing controller 34.
  • the MEMS control unit 8 includes a servo circuit 81 and a driver circuit 82.
  • the MEMS control unit 8 and the laser driver ASIC 7 function as “irradiation control means”.
  • the servo circuit 81 controls the operation of the MEMS mirror 10 based on a signal from the timing controller.
  • the driver circuit 82 amplifies the control signal of the MEMS mirror 10 output from the servo circuit 81 to a predetermined level and outputs the amplified signal.
  • the laser light source unit 9 mainly functions to emit laser light based on a drive signal output from the laser driver ASIC 7. Specifically, the laser light source unit 9 includes a red laser LD1, a blue laser LD2, a green laser LD3, collimator lenses 91a to 91c, reflection mirrors 92a to 92c, a MEMS mirror 10, a front monitor 50, Is provided.
  • the red laser LD1 emits red laser light
  • the blue laser LD2 emits blue laser light
  • the green laser LD3 emits green laser light.
  • the collimator lenses 91a to 91c convert red laser light, blue laser light, and green laser light into parallel light and emit the parallel light to the reflecting mirrors 92a to 92c, respectively.
  • the reflection mirror 92b reflects blue laser light
  • the reflection mirror 92c transmits blue laser light and reflects green laser light.
  • the reflection mirror 92a transmits a part of the red laser light and reflects a part of the blue laser light and the green laser light so that the light is incident on the MEMS mirror 10.
  • the reflection mirror 92a reflects part of the red laser light and transmits part of the blue laser light and the green laser light so that these lights enter the front monitor 50.
  • the red laser LD1, the blue laser LD2, and the green laser LD3 are used without being distinguished from each other, they are simply referred to as “laser LD”, and the red laser light, the blue laser light, and the green laser light are used without being distinguished from each other. In this case, it is simply expressed as “laser light”.
  • the MEMS mirror 10 reflects the laser light incident from the reflection mirror 92a toward the screen 11. Further, the MEMS mirror 10 basically moves to scan on the screen 11 under the control of the MEMS control unit 8 in order to display an image input to the image signal input unit 2, and scanning at that time Position information (for example, information such as a mirror angle) is output to the video ASIC 3.
  • Position information for example, information such as a mirror angle
  • the front monitor 50 receives red laser light, blue laser light, and green laser via reflecting mirrors 92a to 92c (including various optical systems such as mirrors and lenses not shown in FIG. 1). Light is incident. Specifically, red laser light reflected by the reflection mirror 92a and blue laser light and green laser light transmitted through the reflection mirror 92a are incident on the front monitor 50.
  • the front monitor 50 supplies a detection signal S50, which is an electrical signal corresponding to the amount of incident laser light, to the abnormality detection circuit 60.
  • the front monitor 50 is configured by a photoelectric conversion element such as a photodetector. Further, the front monitor 50 changes the detection level according to the control signal S7a supplied from the laser driver ASIC 7 when detecting the amount of laser light in this way.
  • the front monitor 50 transmits a control signal S7a for controlling the timing at which each of the red laser LD1, the blue laser LD2, and the green laser LD3 emits light (that is, on / off of light emission in the laser LD) to the laser driver.
  • a control signal S7a for controlling the timing at which each of the red laser LD1, the blue laser LD2, and the green laser LD3 emits light (that is, on / off of light emission in the laser LD) to the laser driver.
  • the front monitor 50 synchronizes with the light emission timing indicated by the control signal S7a, and sets the detection level according to the number of laser LDs emitting light among the red laser LD1, blue laser LD2, and green laser LD3. Change. More specifically, the front monitor 50 changes the detection level so that the wavelength according to the number of the laser LDs emitting light and the color of the laser LD can be detected appropriately. By doing so, the front monitor 50 can appropriately detect the light amounts of the red laser light, the blue laser light, and
  • Back monitors 51a, 51b, and 51c are provided inside the red laser LD1, the blue laser LD2, and the green laser LD3, respectively.
  • Each of the back monitors 51a, 51b, 51c is directly incident with red laser light, blue laser light, and green laser light (specifically, light emitted from the back side of the laser diode is incident), and the incident lasers.
  • Detection signals S51a, S51b, and S51c which are electrical signals corresponding to the amount of light, are supplied to the laser driver ASIC 7 and the abnormality detection circuit 60.
  • the back monitors 51a, 51b, and 51c are configured by photoelectric conversion elements such as photodetectors.
  • the laser driver ASIC 7 adjusts the power of each of the red laser LD1, the blue laser LD2, and the green laser LD3 (APC: Auto) according to the detection signals S51a, S51b, and S51c supplied from the back monitors 51a, 51b, and 51c. (Power Control).
  • the red laser drive circuit 71, the blue laser drive circuit 72, and the green laser drive circuit 73 in the laser driver ASIC 7 are respectively supplied with a red laser beam, a blue laser beam, and a blue laser beam according to the detection signals S51a, S51b, and S51c.
  • the adjustment is performed so that the light quantity of the green laser light becomes a constant value.
  • back monitor 51 when the back monitors 51a, 51b, and 51c are used without being distinguished from each other, they are simply referred to as “back monitor 51”, and when the detection signals S51a, S51b, and S51c are used without being distinguished from each other, simply “detection” is used. This is denoted as “signal S51”.
  • the abnormality detection circuit 60 performs abnormality determination based on the detection signals S50 and S51 supplied from the front monitor 50 and the back monitor 51. Specifically, the abnormality detection circuit 60 determines an abnormality of the laser LD based on the detection signals S50 and S51 and an optical system (for example, collimator lenses 91a to 91c) including an optical element for guiding the laser light to the user's eyes. And the reflection mirrors 92a to 92c), the front monitor 50, and the back monitor 51 are determined (details of the abnormality determination will be described later). Then, the abnormality detection circuit 60 performs control to stop the irradiation of the laser light when an abnormality is detected. Specifically, the abnormality detection circuit 60 stops the light emission of the laser LD by supplying the control signal S7b to the laser driver ASIC 7, and supplies the control signal S8 to the MEMS control unit 8 to operate the MEMS mirror 10. Stop.
  • the front monitor 50 corresponds to an example of “second detection means” in the present invention
  • the back monitor 51 corresponds to an example of “first detection means” in the present invention
  • the abnormality detection circuit 60 corresponds to an example of “abnormality determination unit” and “control unit” in the present invention
  • the laser driver ASIC 7 corresponds to an example of an “adjustment unit” in the present invention.
  • the abnormality detection circuit 60 determines the abnormality of the laser LD and sends the laser light to the user's eyes based on the detection signals S50 and S51 supplied from the front monitor 50 and the back monitor 51.
  • An abnormality determination of an optical system including an optical element for guiding, an abnormality determination of the front monitor 50, and an abnormality determination of the back monitor 51 are performed. That is, the abnormality detection circuit 60 performs abnormality determination of the front monitor 50 itself and the back monitor 51 itself used for determining abnormality (that is, performs a self-check of the front monitor 50 and the back monitor 51).
  • the abnormality detection circuit 60 performs such abnormality determination of the front monitor 50 and the back monitor 51 when the HMD 1 is powered on. Specifically, after the HMD 1 is turned on and before the user's eyes start to irradiate the laser beam, the laser driver ASIC 7 is placed in a predetermined area outside the image drawing area by the HMD 1 (the “drawing area” And the test operation of irradiating laser light from the laser LD, the abnormality detection circuit 60 performs the front monitor 50 and the test operation when such a test operation is being performed. Based on the detection signals S50 and S51 supplied from the back monitor 51, the abnormality determination of the front monitor 50 and the back monitor 51 is performed.
  • the above-mentioned “predetermined region” includes a portion where light does not reach the user's eyes even when laser light is irradiated, and immediately before the light is emitted from the laser light source unit 9. By doing so, it is possible to appropriately prevent the laser light from irradiating the user's eyes when there is an abnormality when the power is turned on. Even after the HMD 1 is turned on, the abnormality detection circuit 60 always performs abnormality determination based on the detection signals S50 and S51 supplied from the front monitor 50 and the back monitor 51 during laser emission.
  • the abnormality detection circuit 60 Control to stop irradiation.
  • the abnormality detection circuit 60 emits the abnormal laser LD in one example. While stopping, the contents of the abnormal state are displayed using a normal laser LD.
  • the abnormality detection circuit 60 displays that the laser LD is abnormal, the optical system is abnormal, the front monitor 50 is abnormal, or the back monitor 51 is abnormal.
  • the abnormality detection circuit 60 detects an abnormal one and a normal one among the red laser LD1, the blue laser LD2, and the green laser LD3, all the laser LDs including the normal laser LD are detected. Is stopped, and the contents of the abnormal state are displayed using a display device (not shown in FIG. 1) provided separately in the HMD 1.
  • FIG. 2 is a block diagram schematically showing only the components related to the abnormality determination among the components of the HMD 1.
  • the front monitor 50 receives laser light through an optical system, and supplies a detection current (corresponding to the detection signal S50) corresponding to the amount of incident laser light to the conversion unit 60a in the abnormality detection circuit 60.
  • the front monitor 50 changes the detection level according to the control signal S7a supplied from the laser driver ASIC 7 as described above, and detects the amount of laser light.
  • the back monitor 51 receives laser light directly, and converts a detection current (corresponding to the detection signal S51) according to the amount of incident laser light into a conversion unit 60c in the abnormality detection circuit 60 and a conversion unit in the laser driver ASIC7. 7c.
  • the conversion units 60a and 60c in the abnormality detection circuit 60 convert the detection currents supplied from the front monitor 50 and the back monitor 51 into voltages (detection voltages), respectively, and supply the converted detection voltages to the abnormality determination unit 60b. To do.
  • the abnormality determination unit 60b performs abnormality determination on the laser LD, the optical system, the front monitor 50, and the back monitor 51 based on the detection voltages supplied from the conversion units 60a and 60c. Then, when an abnormality is detected, the abnormality determination unit 60b supplies an instruction signal (stop instruction signal) for stopping the irradiation of the laser light to the amplifier 7a in the laser driver ASIC7.
  • the abnormality determination unit 60b determines that the laser LD is abnormal when the detection voltages of both the conversion unit 60a and the conversion unit 60c corresponding to some laser LDs are not within a predetermined range. Further, for example, the abnormality determination unit 60b detects the detection voltage of the conversion unit 60a corresponding to a part of the laser LDs even though the detection voltage of the conversion unit 60c corresponding to all the laser LDs is within a predetermined range. Is not within the predetermined range, it is determined that the optical system used for the part of the laser LDs is abnormal.
  • the abnormality determination unit 60b has the detection voltage of the conversion unit 60a corresponding to all the laser LDs, although the detection voltage of the conversion unit 60c corresponding to all the laser LDs is within a predetermined range. If it is not within the predetermined range, it is determined that the front monitor 50 is abnormal. Further, for example, the abnormality determination unit 60b corresponds to all the laser LDs when the detection voltage of the conversion unit 60c is not within the predetermined range even though the detection voltage of the conversion unit 60a is within the predetermined range. The back monitor 51 corresponding to the detected voltage is determined to be abnormal.
  • the abnormality determination as described above is made on the premise that the possibility that all the laser LDs (LD1 to LD3) and all the back monitors 51 (51a to 51c) become abnormal at the same time is quite low.
  • the “predetermined range” used for abnormality determination is determined based on the amount of laser light after control by normal APC.
  • the amplifier 7a (specifically, corresponding to the red laser driving circuit 71, the blue laser driving circuit 72, and the green laser driving circuit 73) in the laser driver ASIC 7 is supplied with a stop instruction signal from the abnormality determination unit 60b.
  • the laser LD is controlled so as to stop the irradiation of the laser beam.
  • the amplifier 7a outputs a control current for driving the laser LD when the stop instruction signal is not supplied from the abnormality determination unit 60b.
  • the amplifier 7a obtains a difference (difference voltage) between the voltage (detection voltage) obtained by converting the detection current from the back monitor 51 by the conversion unit 7c and the reference voltage supplied from the video ASIC 3 from the laser LD.
  • a control current corresponding to the differential voltage is supplied to the laser LD so that the amount of laser light of the laser beam becomes a constant value.
  • the abnormality determination can be appropriately performed based on the detection signals S50 and S51 supplied from the front monitor 50 and the back monitor 51. Specifically, the abnormality determination of the front monitor 50 itself and the back monitor 51 itself can be appropriately performed. Therefore, when the front monitor 50 and / or the back monitor 51 is abnormal, it is possible to quickly stop the laser beam irradiation.
  • FIG. 3 shows a configuration of an HMD 1a according to a modification in which abnormality determination is performed using two front monitors.
  • symbol is attached
  • the HMD 1a according to the modified example is different from the HMD 1 according to the above-described embodiment in that the back monitor 51 is not provided in the laser LD, the reflection mirror 200 and the front monitor 52 are included in addition to the front monitor 50.
  • the configuration is different.
  • the red laser light reflected by the reflection mirror 92a and the blue laser light and the green laser light transmitted through the reflection mirror 92a are incident on the reflection mirror 200.
  • the reflection mirror 200 transmits a part of the incident laser light and reflects the remaining part of the laser light so that the red laser light, the blue laser light, and the green laser are transmitted to the front monitor 50 and the front monitor 52. Make it incident.
  • Red laser light, blue laser light, and green laser light reflected by the reflection mirror 200 are incident on the front monitor 52.
  • the front monitor 52 supplies a detection signal S52, which is an electrical signal corresponding to the amount of incident laser light, to the laser driver ASIC 7 and the abnormality detection circuit 60.
  • the front monitor 52 includes a photoelectric conversion element such as a photodetector.
  • the front monitor 52 acquires a control signal S7c from the laser driver ASIC 7 for controlling the timing of emitting each of the red laser LD1, the blue laser LD2, and the green laser LD3 when detecting the amount of laser light in this way.
  • the detection level is changed according to the number of laser LDs emitting light among the red laser LD1, the blue laser LD2, and the green laser LD3.
  • the laser driver ASIC 7 adjusts the red laser LD1, blue laser light, and blue laser light so that the light amounts of the red laser light, blue laser light, and green laser light become constant values.
  • Each power adjustment (APC) of the laser LD2 and the green laser LD3 is performed.
  • the abnormality detection circuit 60 performs the same abnormality determination as in the above-described embodiment based on the detection signals S50 and S52 supplied from the front monitor 50 and the front monitor 52.
  • the modification described above it is possible to appropriately perform the abnormality determination based on the detection signals S50 and S52 supplied from the front monitors 50 and 52. Further, in the modified example, since the front monitors 50 and 52 are used instead of the front monitor 50 and the three back monitors 51a, 51b, and 51c, the number of monitors to be used is reduced as compared with the above-described embodiment. be able to.
  • the position where the front monitors 50 and 52 are installed is not limited to the positions shown in the above-described embodiments and modifications.
  • the front monitor can be installed at various positions as long as the laser light is incident through the optical system.
  • the front monitor can be installed at a position through an optical system close to the user's eyes.
  • the front monitor can be installed at a position where the laser light after being reflected by the MEMS mirror 10 enters.
  • the present invention can be suitably used for a head mounted display.
  • HMD Head mounted display
  • Video ASIC Laser driver ASIC 8
  • MEMS control unit Laser light source unit 10

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un dispositif d'affichage monté sur tête ayant un système optique comprenant une source lumineuse destinée à émettre une lumière pour dessiner une image à reconnaître par un utilisateur et un élément optique destiné à guider la lumière aux yeux de l'utilisateur. De plus, le dispositif d'affichage monté sur tête comprend un premier moyen de détection destiné à détecter directement la lumière émise de la source lumineuse sans utiliser le système optique, un second moyen de détection destiné à détecter la lumière émise de la source lumineuse à l'aide du système optique, un moyen de détermination d'anomalie destiné à déterminer s'il y a des anomalies sur la base de la combinaison des résultats de détection obtenus au moyen du premier moyen de détection et du second moyen de détection, et un moyen de commande destiné à commander l'émission lumineuse de la source lumineuse sur la base du résultat de détermination du moyen de détermination d'anomalie. En conséquence, il est possible de déterminer de façon appropriée s'il y a des anomalies sur la base des résultats de détection à la fois du premier moyen de détection et du second moyen de détection.
PCT/JP2011/064670 2011-06-27 2011-06-27 Dispositif d'affichage monté sur tête et procédé et programme de commande utilisés dans le dispositif d'affichage monté sur tête Ceased WO2013001590A1 (fr)

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PCT/JP2011/064670 WO2013001590A1 (fr) 2011-06-27 2011-06-27 Dispositif d'affichage monté sur tête et procédé et programme de commande utilisés dans le dispositif d'affichage monté sur tête

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JP2016127543A (ja) * 2015-01-07 2016-07-11 パイオニア株式会社 投影装置、投影方法、プログラム及び記憶媒体
WO2016181909A1 (fr) * 2015-05-13 2016-11-17 株式会社ソニー・インタラクティブエンタテインメント Visiocasque, dispositif de traitement d'informations, système de traitement d'informations et procédé de sortie de données de contenu
WO2018061539A1 (fr) * 2016-09-30 2018-04-05 ミツミ電機株式会社 Dispositif de balayage optique et visiocasque de type à balayage rétinien
WO2018179858A1 (fr) * 2017-03-28 2018-10-04 株式会社Ｑｄレーザ Module laser et dispositif émetteur laser
JP2018165784A (ja) * 2017-03-28 2018-10-25 株式会社Ｑｄレーザ レーザモジュール及び画像投影装置
JP2020507094A (ja) * 2017-12-25 2020-03-05 歌爾科技有限公司ＧｏｅｒＴｅｋ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ． レーザビーム走査式ディスプレイ機器及び拡張現実メガネ
JPWO2022239323A1 (fr) * 2021-05-10 2022-11-17

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JP2016127543A (ja) * 2015-01-07 2016-07-11 パイオニア株式会社 投影装置、投影方法、プログラム及び記憶媒体
WO2016181909A1 (fr) * 2015-05-13 2016-11-17 株式会社ソニー・インタラクティブエンタテインメント Visiocasque, dispositif de traitement d'informations, système de traitement d'informations et procédé de sortie de données de contenu
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JPWO2018061539A1 (ja) * 2016-09-30 2019-07-11 ミツミ電機株式会社 光走査装置及び網膜走査型ヘッドマウントディスプレイ
WO2018061539A1 (fr) * 2016-09-30 2018-04-05 ミツミ電機株式会社 Dispositif de balayage optique et visiocasque de type à balayage rétinien
JP6997383B2 (ja) 2016-09-30 2022-01-17 ミツミ電機株式会社 光走査装置及び網膜走査型ヘッドマウントディスプレイ
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JP2018165784A (ja) * 2017-03-28 2018-10-25 株式会社Ｑｄレーザ レーザモジュール及び画像投影装置
JP2018166165A (ja) * 2017-03-28 2018-10-25 株式会社Ｑｄレーザ レーザモジュール及びレーザ投射装置
JP7043049B2 (ja) 2017-03-28 2022-03-29 株式会社Ｑｄレーザ レーザ投射装置
WO2018179858A1 (fr) * 2017-03-28 2018-10-04 株式会社Ｑｄレーザ Module laser et dispositif émetteur laser
JP2020507094A (ja) * 2017-12-25 2020-03-05 歌爾科技有限公司ＧｏｅｒＴｅｋ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ． レーザビーム走査式ディスプレイ機器及び拡張現実メガネ
US11372244B2 (en) 2017-12-25 2022-06-28 Goertek Technology Co., Ltd. Laser beam scanning display device and augmented reality glasses
JPWO2022239323A1 (fr) * 2021-05-10 2022-11-17
WO2022239323A1 (fr) * 2021-05-10 2022-11-17 ソニーセミコンダクタソリューションズ株式会社 Dispositif de source de lumière et dispositif d'affichage d'image

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