[go: up one dir, main page]

WO2016143236A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

Info

Publication number
WO2016143236A1
WO2016143236A1 PCT/JP2016/000076 JP2016000076W WO2016143236A1 WO 2016143236 A1 WO2016143236 A1 WO 2016143236A1 JP 2016000076 W JP2016000076 W JP 2016000076W WO 2016143236 A1 WO2016143236 A1 WO 2016143236A1
Authority
WO
WIPO (PCT)
Prior art keywords
video signal
liquid crystal
light
crystal panel
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/JP2016/000076
Other languages
English (en)
Japanese (ja)
Inventor
亮佑 中越
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JVCKenwood Corp
Original Assignee
JVCKenwood Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2015235420A external-priority patent/JP2016170386A/ja
Application filed by JVCKenwood Corp filed Critical JVCKenwood Corp
Publication of WO2016143236A1 publication Critical patent/WO2016143236A1/fr
Priority to US15/699,866 priority Critical patent/US20170374328A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Definitions

  • the present invention relates to a display device.
  • Patent Document 1 discloses a video display device that displays a high-contrast video.
  • the video display device described in Patent Literature 1 includes an RGB projection display device that outputs light based on three primary color signals, and a Y projection display device that modulates light from an RGB projection display device based on a luminance signal. High contrast is realized using a display device.
  • the projection display device for Y modulates the luminance of light including RGB components. For this reason, in the projection display apparatus for RGB, since it is affected by the leakage light of the R modulation element, the G modulation element, or the B modulation element, the dynamic range is reduced.
  • the dynamic range is narrowed.
  • the present invention has been made in view of the above points, and an object thereof is to provide a display device capable of realizing display with a high dynamic range.
  • the display device modulates and emits incident light according to a projection unit that emits light modulated according to a first video signal composed of three primary color signals and a second video signal composed of three primary color signals.
  • a display unit comprising a transmissive liquid crystal panel, a polarizing plate that emits light of a predetermined polarization direction among incident light, and a first screen Generating the first video signal and the second video signal for driving the transmissive liquid crystal panel, and synchronizing the first video signal and the second video signal
  • the display control unit is arranged in the order of the traveling direction of the light emitted from the projection unit, in the order of the transmissive liquid crystal panel, the polarizing plate, and the first screen. It is configured.
  • FIG. 1 is a perspective view illustrating an appearance of a display device according to a first embodiment.
  • 1 is a configuration diagram illustrating an example of an internal configuration of a display device according to a first exemplary embodiment
  • FIG. 6 is a diagram schematically illustrating a polarization state in the display device according to the first exemplary embodiment, and illustrates a polarization state of light incident on the phase difference plate.
  • FIG. 6 is a diagram schematically illustrating a polarization state in the display device according to the first exemplary embodiment, and illustrates a polarization state of light emitted from the phase difference plate. It is a figure which shows typically the polarization state in the display apparatus concerning Embodiment 1, and shows the polarization state of the light inject
  • FIG. 1 is a block diagram showing a configuration of a display device according to a first exemplary embodiment.
  • FIG. 1 is a block diagram showing a configuration of a display device according to a first exemplary embodiment.
  • 2 is a block diagram showing a configuration of a signal processing unit according to the first exemplary embodiment
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of an input video signal.
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a transmissive liquid crystal panel.
  • 6 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a projection unit.
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of an input video signal.
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a transmissive liquid crystal panel.
  • 6 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a projection unit.
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of an input video signal.
  • 4 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a transmissive liquid crystal panel.
  • FIG. 6 is a graph showing an example of gamma characteristics in the display device according to the first exemplary embodiment, and shows gamma characteristics of a projection unit.
  • FIG. 6 is a configuration diagram illustrating an example of an internal configuration of a display device according to a second exemplary embodiment; It is the table
  • Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings.
  • FIG. 1 is a perspective view showing an appearance of the display device 1.
  • the display device 1 is a rear projection type projector (rear projector), and a display unit 30 is provided on the front surface of the housing 10. More specifically, the display device 1 is a rear projector configured using LCOS (Liquid Crystal Crystal on Silicon) which is a reflective liquid crystal display element.
  • FIG. 2 is a configuration diagram illustrating an example of the internal configuration of the housing 10 of the display device 1.
  • the display device 1 includes a projection unit 20, a display unit 30, a mirror 40, and a display control unit 50.
  • the mirror 40 reflects the light emitted from the projection unit 20 toward the display unit 30.
  • Projection unit 20 generates projection light based on the video signal in order to project an image on display unit 30. More specifically, the projection unit 20 emits linearly polarized light corresponding to a first video signal, which will be described later, composed of three primary color signals. Hereinafter, the configuration of the projection unit 20 will be described.
  • the projection unit 20 has a light source 201.
  • the light source 201 is, for example, a lamp.
  • the light emitted from the light source 201 is incident on the dichroic mirror 203 via an integrator 202 that emits the light emitted from the light source 201 with a uniform illuminance distribution in a plane perpendicular to the optical axis.
  • the dichroic mirror 203 separates the incident light into R light having a red band component, G light having a green band component, and B light having a blue band component.
  • the R light and G light separated by the dichroic mirror 203 enter the mirror 204. Further, the B light separated by the dichroic mirror 203 is incident on the mirror 205.
  • the R light and G light separated by the dichroic mirror 203 are reflected by the mirror 204 and enter the dichroic mirror 206.
  • the dichroic mirror 206 separates the incident R light and G light.
  • the R light separated by the dichroic mirror 206 passes through the R field lens 207R and enters the R polarization control element 208R inclined at 45 °.
  • the R polarization control element 208R is, for example, a wire grid type polarization beam splitter, and transmits P-polarized light and reflects S-polarized light.
  • the P-polarized R light transmitted through the R polarization control element 208R is incident on the R display element 209R.
  • the R display element 209 ⁇ / b> R is configured by LCOS, and modulates R light based on a video signal output from the display control unit 50 described later.
  • the R light incident on the R display element 209R is reflected by the R display element 209R and returns to the R polarization control element 208R.
  • the component modulated into S-polarized light by the R display element 209R is reflected toward the dichroic prism 210 by the R polarization control element 208R.
  • the R light reflected in the direction of the dichroic prism 210 is incident on the first surface of the dichroic prism 210.
  • the component not modulated by the R display element 209R is transmitted through the R polarization control element 208R and returns to the R field lens 207R.
  • the G light separated by the dichroic mirror 206 passes through the G field lens 207G and enters the G polarization control element 208G inclined by 45 °.
  • the G polarization control element 208G is, for example, a wire grid type polarization beam splitter, and transmits P-polarized light and reflects S-polarized light.
  • the P-polarized G light transmitted through the G polarization control element 208G enters the G display element 209G.
  • the G display element 209 ⁇ / b> G is configured by LCOS, and modulates the G light based on the video signal output from the display control unit 50.
  • the G light incident on the G display element 209G is reflected by the G display element 209G and returns to the G polarization control element 208G.
  • the component modulated into S-polarized light by the G display element 209G is reflected in the direction of the dichroic prism 210 by the G polarization control element 208G.
  • the G light reflected in the direction of the dichroic prism 210 is incident on the second surface of the dichroic prism 210.
  • the component not modulated by the G display element 209G is transmitted through the G polarization control element 208G and returns to the direction of the G field lens 207G.
  • the B light separated by the dichroic mirror 203 is reflected by the mirror 205, passes through the B field lens 207B, and enters the B polarization control element 208B inclined at 45 °.
  • the B polarization control element 208B is, for example, a wire grid type polarization beam splitter, and transmits P-polarized light and reflects S-polarized light.
  • the P-polarized B light transmitted through the B polarization control element 208B is incident on the B display element 209B.
  • the B display element 209 ⁇ / b> B is configured by LCOS, and modulates the B light based on the video signal output from the display control unit 50.
  • the B light incident on the B display element 209B is reflected by the B display element 209B and returns to the B polarization control element 208B.
  • the component modulated to S-polarized light by the B display element 209B is reflected by the B polarization control element 208B in the direction of the dichroic prism 210.
  • the B light reflected toward the dichroic prism 210 is incident on the third surface of the dichroic prism 210.
  • the component not modulated by the B display element 209B is transmitted through the B polarization control element 208B and returns to the B field lens 207B.
  • the R display element 209R, the G display element 209G, and the B display element 209B may be collectively referred to as a display element 209.
  • the dichroic prism 210 emits S-polarized components of R light, G light, and B light incident from three directions toward the projection lens 212. Therefore, linearly polarized light is emitted to the projection lens 212.
  • the light emitted from the dichroic prism 210 enters the projection lens 212 via the phase difference plate 211.
  • the phase difference plate 211 adjusts the polarization direction of the light emitted from the projection unit 20 to the polarization direction required as the incident light of the display unit 30.
  • the polarization direction required as the incident light of the display unit 30 is, for example, a direction obtained by rotating the polarization direction that transmits a polarizing plate 302 (to be described later) of the display unit 30 by 90 °.
  • the projection lens 212 projects the incident light onto the display unit 30 via the mirror 40 to form an image.
  • the light emitted from the projection unit 20 is linearly polarized light.
  • the linearly polarized light emitted from the projection unit 20 enters the transmissive liquid crystal panel 301 via the phase difference plate 211.
  • the retardation plate 211 is not used, if the polarization direction of the light emitted from the projection unit 20 is already the polarization direction required as the incident light of the display unit 30, the retardation plate 211 is provided. It does not have to be.
  • the phase difference plate 211 is omitted, and the light emitted from the projection unit 20 is arbitrarily adjusted by rotating the projection unit 20 around the traveling direction of the light emitted from the projection unit 20 as an axis.
  • the polarization direction may be the polarization direction required as the incident light of the display unit 30.
  • the display unit 30 includes a transmissive liquid crystal panel 301 having a predetermined resolution, a polarizing plate 302 having a size corresponding to the size of the display surface of the transmissive liquid crystal panel 301, and a transmissive liquid crystal panel.
  • a screen 303 having a size corresponding to the size of the liquid crystal panel 301 is provided.
  • the transmissive liquid crystal panel 301, the polarizing plate 302, and the screen 303 are arranged in the order of the traveling direction of the light emitted from the projection unit 20 in the order. They are arranged in a row in order.
  • the polarizing plate is not necessarily provided on the light incident side from the projection unit 20 in the transmissive liquid crystal panel 301. This is because, as described above, since the light emitted from the projection unit 20 is linearly polarized light, it is not necessary to align the plane of polarization on one plane before the light enters the transmissive liquid crystal panel 301. .
  • the transmissive liquid crystal panel 301 has a liquid crystal layer and a glass substrate (not shown), and modulates each primary color light from the projection unit 20 and changes the polarization direction in accordance with a later-described second video signal including the three primary color signals.
  • Light that has passed through the transmissive liquid crystal panel 301 enters the polarizing plate 302.
  • the polarizing plate 302 transmits light polarized in a predetermined direction.
  • the display unit 30 controls the transmission amount of each of R light, G light, and B light incident from the projection unit 20 for each pixel based on the second video signal, and displays the image. Do.
  • the resolution of the display unit 30 corresponds to the resolution of the projection unit 20, and each pixel in the projection unit 20 has a one-to-one correspondence with each pixel of the transmissive liquid crystal panel 301. Accordingly, each of R light modulated by the R display element 209R, G light modulated by the G display element 209G, and B light modulated by the B display element 209B, which corresponds to one pixel of the projection unit 20, Are modulated in the display unit 30 in accordance with the second video signal. Note that the light dots projected by the projection unit 20 and the pixels of the transmissive liquid crystal panel 301 need to be aligned with each other.
  • FIG. 3A to 3C are diagrams schematically illustrating the polarization state in the display device 1.
  • FIG. 4A to 4C are diagrams schematically showing a polarization state in the configuration of the comparative example.
  • a comparative example a configuration in which the configuration of the projection unit 20 is replaced with DLP (Digital Light Processing) is assumed. That is, in the configuration according to the comparative example, it is assumed that the configuration upstream of the phase difference plate 211 in the projection unit 20 is realized by DLP.
  • 3A and 4A show the polarization state of the light incident on the phase difference plate 211, FIGS.
  • FIGS. 3C and 4C show the display.
  • the polarization state of the light emitted from the unit 30 is shown. More specifically, FIG. 4B shows a polarization state after the light emitted from the phase difference plate 211 is transmitted through the added polarizing plate.
  • the light incident on the phase difference plate 211 is linearly polarized light (see FIG. 3A).
  • the polarization direction is adjusted by the phase difference plate 211 (see FIG. 3B).
  • the light incident on the phase difference plate 211 is in a non-polarized state (see FIG. 4A).
  • polarization required for incident light of the transmissive liquid crystal panel 301 is realized (see FIG. 4B).
  • the polarizing plate when the polarizing plate is provided in the front stage of the transmissive liquid crystal panel 301 in this way, the light amount is lost due to the polarizing plate. In addition, an increase in cost is caused by providing a polarizing plate corresponding to the size of the transmissive liquid crystal panel 301.
  • the polarization state of the light emitted from the display unit 30 varies depending on the characteristics of the screen 303. That is, when the screen 303 has the characteristic of maintaining the polarization of the incident light, the polarization of the light incident on the screen 303 is maintained, but when the screen 303 does not have the characteristic of maintaining the polarization, the screen 303 Will disappear. In the configuration shown in the comparative example, the phase difference plate 211 may be omitted.
  • FIG. 5 is a block diagram showing the configuration of the display device 1.
  • the display control unit 50 includes a signal processing unit 500, a first synchronization unit 511, and a second synchronization unit 512.
  • Each configuration of the display control unit 50 may be realized by software based on a program, or may be realized by any combination of hardware, firmware, and software.
  • a program for example, it is realized by executing a program stored in a memory (not shown) of the display control unit 50 by a CPU (Central Processing Unit) (not shown) of the display control unit 50.
  • a CPU Central Processing Unit
  • the input video signal and the synchronization signal are input to the signal processing unit 500.
  • the input video signal input to the signal processing unit 500 may be transmitted to the display device 1 from another device, for example, or may be stored in a storage device (not shown) of the display device 1. Good.
  • a synchronization signal for example, a synchronization signal generated by a synchronization signal generation circuit (not shown) is input to the signal processing unit 500.
  • the input video signal is a video signal composed of RGB three primary color signals.
  • the input video signal is, for example, a video signal having a higher bit than an 8-bit video signal that is generally used as a video signal. That is, for example, the input video signal is composed of an R-color 16-bit input video signal, a G-color 16-bit input video signal, and a B-color 16-bit input video signal.
  • the input video signal is a video signal that has been subjected to gamma correction of a predetermined gamma value. As an example, the gamma value of the gamma characteristic of the input video signal is 2.2.
  • the signal processing unit 500 generates a first video signal for performing display control by the projection unit 20 and a second video signal for performing display control by the display unit 30 from the input video signal. That is, the signal processing unit 500 generates a first video signal and a second video signal from the input video signal, controls the projection unit 20 based on the first video signal, and based on the second video signal. Thus, the transmissive liquid crystal panel 301 is controlled. The generation of the first video signal and the second video signal by the signal processing unit 500 will be described later.
  • the signal processing unit 500 performs processing in synchronization with the input synchronization signal.
  • the signal processing unit 500 outputs the generated first video signal to the first synchronization unit 511. Further, the signal processing unit 500 outputs the generated second video signal to the second synchronization unit 512. A synchronization signal is also output to the first synchronization unit 511 and the second synchronization unit 512.
  • the first video signal is supplied to the device driving unit 250 of the projection unit 20 via the first synchronization unit 511. Further, the second video signal is supplied to the panel driving unit 350 of the display unit 30 via the second synchronization unit 512.
  • the first synchronization unit 511 and the second synchronization unit 512 perform delay processing for adding optimal delays to the first video signal and the second video signal, respectively. Note that delay processing may be performed in either the first synchronization unit 511 or the second synchronization unit 512.
  • the first synchronization unit 511 and the second synchronization unit 512 perform delay processing based on the synchronization signal. Then, the first synchronization unit 511 outputs the first video signal to the device driving unit 250 of the projection unit 20. Further, the second synchronization unit 512 outputs the second video signal to the panel drive unit 350 of the display unit 30.
  • the device driving unit 250 generates a driving signal for driving the display element 209 according to the first video signal, and drives the display element 209 by the driving signal.
  • the panel driving unit 350 generates a drive signal for driving the transmissive liquid crystal panel 301 according to the second video signal, and drives the transmissive liquid crystal panel 301 by the drive signal.
  • FIG. 6 is a block diagram illustrating a configuration of the signal processing unit 500.
  • the signal processing unit 500 includes a first LUT (Lookup table) unit 501 and a second LUT unit 502.
  • the first LUT unit 501 and the second LUT unit 502 are realized by a storage device such as a memory (not shown) of the display control unit 50, for example.
  • the first LUT unit 501 is a lookup table that adjusts the projection unit 20 to the first output characteristic.
  • the second LUT unit 502 is a lookup table that adjusts the transmissive liquid crystal panel 301 to the second output characteristic.
  • the sum of the gamma value in the first output characteristic and the gamma value in the second output characteristic is equal to the gamma value of the input video signal.
  • a description will be given assuming that the gamma value of the input video signal is 2.2. In this case, the input video signal is correctly displayed when the gamma value of the output characteristic is 2.2.
  • the first LUT unit 501 is configured as a table adjusted so that the output characteristic of the projection unit 20 is gamma 1.1.
  • the second LUT unit 502 is configured as a table adjusted so that the output characteristic of the display unit 30 is gamma 1.1.
  • Such a table can be created, for example, by actually outputting in the projection unit 20 or the display unit 30 and measuring the illuminance at that time with an illuminometer.
  • the signal processing unit 500 provides an input video signal as an input to the first LUT unit 501 and the second LUT unit 502. Then, the signal processing unit 500 sets the output of the first LUT unit 501 for the input video signal as the first video signal, and sets the output of the second LUT unit 502 for the input video signal as the second video signal.
  • a first video signal or a second video signal is generated for each RGB signal in the input video signal. That is, an R first video signal and an R second video signal are generated from the R input video signal.
  • a G first video signal and a G second video signal are generated from the G input video signal.
  • a B first video signal and a B second video signal are generated from the B input video signal.
  • RGB may be processed independently by the LUT, and the bits of the first video signal and the second video signal may be processed.
  • the number can be any number of bits.
  • the first video signal and the second video signal may be 16-bit video signals, or the upper 8-bit signal on the MSB (most significant bit) side is used. It may be supplied as a first video signal, and a lower 8-bit signal on the LSB (least significant bit) side may be supplied as a second video signal.
  • the gamma value realized by the LUT will be further described.
  • the first output characteristic and the second output characteristic are close to linear. For this reason, the reproducibility of dark part gradation is improved.
  • the first output characteristic and the second output characteristic are 1.1 when simply divided as described above.
  • the value of 1 in 8-bit input is about 0.000005 for white (value of 255 in 8-bit input) in terms of brightness.
  • the contrast on the display surface can be displayed at 2,000,000: 1, the brightness indicated by the value of 1 (8 bits) in the theoretical gamma curve cannot be reproduced.
  • the gamma value is 1.1
  • the value of 1 in 8-bit input is about 0.0023 with respect to white (255 value in 8-bit input)
  • the contrast on the display surface is 440. : 1
  • the contrast performance required for the transmissive liquid crystal panel 301 can be suppressed. That is, an ideal gamma characteristic can be obtained by combining the transmissive liquid crystal panel 301 and the projection unit 20 that are relatively easily available.
  • RGB luminance
  • RGB luminance
  • the RGB signal of the input video signal is divided into the RGB signal of the first video signal and the RGB signal of the second video signal, so that each color is processed independently. It is easy to maintain gradation. Further, since the conversion is from RGB three-dimensional to RGB three-dimensional, the generation of the first video signal and the second video signal can be realized relatively easily.
  • the display device 1 it is possible to display an input video signal having a large gamma value of 2.2 or more as the gamma characteristic.
  • the gamma characteristic is 2.2
  • a value obtained by raising the input video signal to the power of 2.2 has a specified luminance (brightness).
  • the display device 1 since the multiplication of the output values of the projection unit 20 and the transmissive liquid crystal panel 301 is the final output value, it can be realized relatively easily.
  • the display device 1 it is possible to display an input video signal having a large gamma value of 2.2 or more as the gamma characteristic.
  • the gamma value of the gamma characteristic of the input video signal is larger, the dark portion gradation is maintained, so according to the display device 1 according to the present embodiment, the error when quantizing the image data is expressed in the floating-point format. By making it image data, it also contributes to reducing the quantization error of dark part gradation.
  • the gamma value of the first output characteristic (that is, the gamma value of the output characteristic of the projection unit 20) is 1.1
  • the gamma value of the second output characteristic (that is, the output of the display unit 30).
  • the characteristic gamma value) is 1.1, but is not limited thereto. That is, the sum of the gamma value in the first output characteristic and the gamma value in the second output characteristic may be equal to the gamma value of the input video signal. 7A to 7C, FIG. 8A to FIG. 8C, and FIG. 9A to FIG.
  • FIG. 9C show the relationship (gamma characteristic) between the input value that is the input video signal or the video signal and the light output in the display device 1 of the present embodiment. It is a graph which shows an example. 7A, 8A, and 9A show the gamma characteristics of the input video signal, FIGS. 7B, 8B, and 9B show the gamma characteristics of the transmissive liquid crystal panel 301, and FIGS. 7C, 8C, and 9C show the projections.
  • the gamma characteristic of the part 20 is shown. 7A to 7C, 8A to 8C, and 9A to 9C, the horizontal axis represents an input video signal or an input value that is a video signal, and the vertical axis represents an optical output value. That is, in FIG.
  • the horizontal axis indicates the input value that is the second video signal output from the second LUT unit 502
  • the vertical axis indicates the light output value of the transmissive liquid crystal panel 301.
  • the horizontal axis represents the input value that is the first video signal output from the first LUT unit 501
  • the vertical axis represents the light output value of the projection unit 20.
  • FIGS. 7A to 7C show the first output characteristic (output characteristic of the projection unit 20) and the second output when the gamma value of the gamma characteristic of the input video signal specified in the above description is 2.2.
  • the gamma value of the gamma characteristic of the input video signal is defined by 3.2
  • the gamma value of the first output characteristic is 2.2.
  • the gamma value of the second output characteristic is 1.
  • the projection unit 20 has a higher contrast than the transmissive liquid crystal panel 301.
  • the gamma value in the higher contrast output characteristics of the projection unit 20 and the transmissive liquid crystal panel 301 is the gamma value in the lower contrast output characteristics of the projection unit 20 and the transmissive liquid crystal panel 301. Larger adjustments may be made. Thereby, the contrast of the entire display device 1 can be improved.
  • FIGS. 9A to 9C show an example in which the modulation of the transmissive liquid crystal panel 301 is limited to a predetermined range on the dark side.
  • the gamma value of the gamma characteristic of the input video signal is defined by 2.2
  • the gamma value of the first output characteristic is 2 .2 (where the gamma value is 1.2 when the input is 0.25 or less)
  • the gamma value of the second output characteristic the output characteristic of the transmissive liquid crystal panel 301) is 1.
  • the second output characteristic when the input value is 0.25 or more, the light output amount is uniformly maximized.
  • the output characteristics of the transmissive liquid crystal panel 301 may be fixed to the maximum value when the input value is equal to or greater than a predetermined value. As a result, all the gradations of the transmissive liquid crystal panel 301 can be assigned to a gamma region having an input value of 0.25 or less, and there is an advantage that gradations on the dark side can be expressed with finer gradations. .
  • the display device 1 has been described above.
  • light that is modulated for each of RGB by the projection unit 20 is output, and each of the RGB light that is emitted from the projection unit 20 is further modulated by the transmissive liquid crystal panel 301.
  • the influence of leaking light can be suppressed and the contrast can be improved.
  • a case where only the R color is displayed will be described as an example with a comparative example.
  • G in the second modulation device is assumed. The leakage of light and B light causes a decrease in contrast.
  • both the dot of light projected by the projection unit 20 and the pixel of the transmissive liquid crystal panel 301 correspond to each other. Must be aligned.
  • moire may appear due to the projection light dots from the projection unit 20 and the pixel structure of the transmissive liquid crystal panel 301. Therefore, in the present embodiment, generation of moire is suppressed by diffusing the projection light from the projection unit 20 incident on the transmissive liquid crystal panel 301 immediately before the incident.
  • FIG. 10 is a configuration diagram illustrating an example of an internal configuration of the display device 2 according to the second embodiment.
  • the same elements as those described above are denoted by the same reference numerals, and redundant description is omitted.
  • the display device 2 is different from the display device 1 in that the display unit 30 is replaced with a display unit 31.
  • the display unit 31 includes a screen 304 having a size corresponding to the size of the transmissive liquid crystal panel 301, a transmissive liquid crystal panel 301, a polarizing plate 302, and a screen 303.
  • the screen 304, the transmissive liquid crystal panel 301, the polarizing plate 302, and the screen 303 are arranged in the order of the traveling direction of the light emitted from the projection unit 20, the screen 304, the transmissive liquid crystal panel 301, The polarizing plate 302 and the screen 303 are arranged side by side in this order.
  • the screen 304 is a screen having a characteristic of maintaining the polarization of incident light.
  • a screen having the property of maintaining polarized light for example, a blue ocean screen manufactured by Nitto Resin Co., Ltd. can be used.
  • the light emitted from the projection unit 20 is diffused by the screen 304 and then enters the transmissive liquid crystal panel 301.
  • the transmissive liquid crystal panel 301 since the projection light is not directly focused on the transmissive liquid crystal panel 301, the occurrence of moire can be reduced. Therefore, since it is not necessary to adjust the position for reducing moire, the projection unit 20 and the transmissive liquid crystal panel 301 can be easily aligned.
  • the transmissive liquid crystal panel 301 has a thickness, when the viewpoint position deviates from the front of the display unit 30, two images of an image projected on the screen 303 and an image displayed on the transmissive liquid crystal panel 301 are parallax. However, there is an advantage that the two images can be visually recognized by being shifted because the screen 304 is arranged.
  • the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
  • the input video signal, the first video signal, and the second video signal have been described as RGB signals, but may be signals expressed in other color spaces.
  • a signal represented by a luminance signal and two color difference signals such as a YPbPr signal may be used.
  • the projection unit 20 emits linearly polarized light.
  • the projection unit 20 emits light other than the linearly polarized light that is modulated according to the first video signal. It may be replaced with a part. That is, for example, a projection unit that emits circularly polarized light modulated according to the first video signal described above, or a projection unit that emits non-polarized light modulated according to the first video signal described above is used. May be.
  • the driving method of the transmissive liquid crystal panel 301 can be any method.
  • the transmissive liquid crystal panel 301 may be a TN (Twisted Nematic) liquid crystal panel, a VA (Vertical Alignment) liquid crystal panel, or an IPS (In-Place-Switching) method. It may be a liquid crystal panel.
  • TN Transmission Nematic
  • VA Vertical Alignment
  • IPS In-Place-Switching
  • FIG. 11 is a table summarizing the characteristics of each of the TN, VA, and IPS liquid crystal panels.
  • the TN method when the voltage applied to the liquid crystal panel is maximum, the light is blocked and the screen is displayed in black, and when the voltage is not applied to the liquid crystal panel, the screen is displayed in white. Show.
  • the VA method and the IPS method when no voltage is applied to the liquid crystal panel, the light is blocked and the screen is displayed in black, and when the voltage applied to the liquid crystal panel is maximum, the screen is displayed in white.
  • the type is shown as an example.
  • the VA method has the largest contrast
  • the TN method has the next highest contrast.
  • the IPS system is the most inferior in contrast performance among these three systems.
  • the IPS method has the largest viewing angle
  • the VA method has the next largest viewing angle.
  • the TN system is the most inferior in viewing angle performance among these three systems.
  • the numbers in the columns for contrast and viewing angle indicate that the smaller the value, the better.
  • the polarization direction of the polarizing plate 302 on the light emission side of the liquid crystal panel that is, the transmission axis of the polarizing plate 302 is used as a reference.
  • the polarization direction of light transmitted through the liquid crystal panel is incident on the liquid crystal panel. It is orthogonal to the polarization direction of the light. Therefore, when this type of TN liquid crystal panel is used, the polarization direction of light incident on the liquid crystal panel is required to be rotated by 90 ° with respect to the reference.
  • the polarization direction of the light incident on the liquid crystal panel is rotated by 90 ° with respect to the reference. It is required to do. On the other hand, there is no change in the polarization state when no voltage is applied to the liquid crystal panel.
  • the polarization direction of the light emitted from the projection unit 20 may be a direction orthogonal to the reference.
  • FIG. 12 is a table summarizing configuration examples when the display device is configured by the projection unit 20 that emits linearly polarized light as shown in the above embodiment.
  • the polarization direction of light incident on the liquid crystal panel is required to be rotated by 90 ° with respect to the reference. For this reason, as shown in configuration examples 1 and 4 in FIG. 12, when the polarization direction of the light emitted from the projection unit 20 is the same as the reference, the slow axis or the fast axis is relative to the polarization plane of the incident light.
  • a 1 / 2 ⁇ plate which is a retardation plate arranged at an azimuth angle of 90 °, is inserted between the projection unit 20 and the transmissive liquid crystal panel 301 so that the polarization direction is orthogonal to the reference.
  • the retardation plate 211 corresponds to such a retardation plate.
  • configuration examples 2 and 3 in FIG. 12 when the polarization direction of the emitted light from the projection unit 20 is orthogonal to the reference, it is necessary to change the polarization direction of the emitted light from the projection unit 20. Therefore, it is not necessary to insert a retardation plate.
  • FIG. 13 is a table summarizing configuration examples in the case where the display device is configured by a projection unit that emits circularly polarized light.
  • the above-described display device is configured using a projection unit in which the emitted light is circularly polarized light instead of the projection unit 20 that emits linearly polarized light, as shown in the configuration examples 5 and 6 in FIG.
  • a quarter-wave plate which is a retardation plate whose slow axis or fast axis is arranged at an azimuth angle of 45 degrees, is inserted between the projection unit 20 and the transmissive liquid crystal panel 301, and based on the polarization direction. Make them orthogonal.
  • FIG. 13 is a table summarizing configuration examples in the case where the display device is configured by a projection unit that emits circularly polarized light.
  • the above-described display device is configured using a projection unit in which the emitted light is circularly polarized light instead of the projection unit 20 that emits linearly polarized light, as shown in
  • Configuration Example 5 illustrates a configuration example when the projection unit emits counterclockwise or clockwise circularly polarized light when the transmission axis of the polarizing plate is in the vertical direction.
  • Configuration example 6 shows a configuration example when the projection unit emits counterclockwise or clockwise circularly polarized light when the transmission axis of the polarizing plate is in the horizontal direction.
  • the polarization direction of the light incident on the liquid crystal panel can be made orthogonal to the reference by rotating and adjusting the optical axis of the phase difference plate according to the rotation direction of the circularly polarized light.
  • FIG. 14 is a table summarizing configuration examples in the case where the display device is configured by a projection unit that emits non-polarized light.
  • the above-described display device is configured using a projection unit that emits non-polarized light instead of the projection unit 20 that emits linearly polarized light, as shown in Configuration Examples 7 and 8 in FIG.
  • a display device is configured. That is, in this display device, a polarizing plate having a transmission axis perpendicular to the transmission axis of the polarizing plate 302 on the light emission side of the liquid crystal panel is inserted between the projection unit 20 and the transmissive liquid crystal panel 301, and The polarization direction of light incident on the transmissive liquid crystal panel 301 is orthogonal to the reference. In this display device, the retardation plate is not always necessary.
  • FIGS. 12 to 14 as an example, only the case where the polarization direction of the polarizing plate 302 on the light emission side of the liquid crystal panel is the horizontal direction or the vertical direction is shown. However, it goes without saying that the display device can be appropriately configured.
  • various types of panels including the TN mode, the VA mode, and the IPS mode can be adopted as the mode of the transmissive liquid crystal panel.
  • a person who views an image on a display device, that is, a user is a liquid crystal panel
  • a VA liquid crystal panel is preferably used as the transmissive liquid crystal panel 301.
  • the liquid crystal panel having a configuration that transmits light when the polarization direction is rotated by 90 ° by the liquid crystal has been described as an example. However, for example, a configuration that blocks light when the polarization direction is rotated by 90 ° by the liquid crystal is provided.
  • the polarization direction of the light emitted from the projection unit may coincide with the reference.
  • the display device may be configured so that light having a polarization direction required as incident light of the liquid crystal panel is incident on the liquid crystal panel.
  • the present invention is applicable to display devices and has industrial applicability.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un dispositif d'affichage (1) qui comporte : une unité de projection (20) qui émet une lumière qui correspond à un premier signal vidéo qui comprend un signal des trois couleurs primaires ; une unité d'affichage (30) qui comprend un panneau à cristaux liquides du type à transmission (301) qui, selon un second signal vidéo qui comprend un signal des trois couleurs primaires, modifie la direction de polarisation de chacune des trois couleurs primaires de la lumière provenant de l'unité de projection, à l'aide d'une plaque de polarisation (302), et à l'aide d'un écran (303) ; et une unité de commande d'affichage (50) qui génère le premier signal vidéo et le second signal vidéo à partir d'un signal vidéo d'entrée qui comprend un signal des trois couleurs primaires, qui commande l'unité de projection (20) sur la base du premier signal vidéo, et qui délivre en sortie un signal vidéo qui est destiné à commander le panneau à cristaux liquides du type à transmission (301) sur la base du second signal vidéo. L'unité d'affichage (30) est configurée de telle sorte que le panneau à cristaux liquides du type à transmission (301), la plaque de polarisation (302), et l'écran (303) sont disposés dans cet ordre dans la direction d'avancement de la lumière émise à partir de l'unité de projection (20).
PCT/JP2016/000076 2015-03-10 2016-01-08 Dispositif d'affichage Ceased WO2016143236A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/699,866 US20170374328A1 (en) 2015-03-10 2017-09-08 Display device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015047096 2015-03-10
JP2015-047096 2015-03-10
JP2015235420A JP2016170386A (ja) 2015-03-10 2015-12-02 表示装置
JP2015-235420 2015-12-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/699,866 Continuation US20170374328A1 (en) 2015-03-10 2017-09-08 Display device

Publications (1)

Publication Number Publication Date
WO2016143236A1 true WO2016143236A1 (fr) 2016-09-15

Family

ID=56879125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/000076 Ceased WO2016143236A1 (fr) 2015-03-10 2016-01-08 Dispositif d'affichage

Country Status (1)

Country Link
WO (1) WO2016143236A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618818A (ja) * 1992-12-09 1994-01-28 Casio Comput Co Ltd プロジェクタ装置
JPH09189893A (ja) * 1996-01-09 1997-07-22 Nec Corp 液晶プロジェクタ
JP2002214433A (ja) * 2001-01-16 2002-07-31 Nitto Denko Corp 光拡散板、光学素子及び液晶表示装置
JP2004138733A (ja) * 2002-10-16 2004-05-13 Astro Design Inc 映像表示装置
JP2007514242A (ja) * 2003-12-09 2007-05-31 マシュー ベル、 内蔵型インタラクティブ・ビデオ・ディスプレイ・システム
WO2007108183A1 (fr) * 2006-03-22 2007-09-27 Sharp Kabushiki Kaisha Dispositif d'affichage a cristaux liquides et recepteur de television
JP2009037259A (ja) * 2001-02-27 2009-02-19 Univ Of British Columbia 高ダイナミック・レンジ表示装置
JP2011158697A (ja) * 2010-02-01 2011-08-18 Asahi Kasei Corp 拡散シート及びマルチレイヤーディスプレイ
JP2013011672A (ja) * 2011-06-28 2013-01-17 Canon Inc 偏光変調装置および画像投射装置
JP2013190636A (ja) * 2012-03-14 2013-09-26 Seiko Epson Corp 波長分離装置、プロジェクター、及び画像表示システム

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618818A (ja) * 1992-12-09 1994-01-28 Casio Comput Co Ltd プロジェクタ装置
JPH09189893A (ja) * 1996-01-09 1997-07-22 Nec Corp 液晶プロジェクタ
JP2002214433A (ja) * 2001-01-16 2002-07-31 Nitto Denko Corp 光拡散板、光学素子及び液晶表示装置
JP2009037259A (ja) * 2001-02-27 2009-02-19 Univ Of British Columbia 高ダイナミック・レンジ表示装置
JP2004138733A (ja) * 2002-10-16 2004-05-13 Astro Design Inc 映像表示装置
JP2007514242A (ja) * 2003-12-09 2007-05-31 マシュー ベル、 内蔵型インタラクティブ・ビデオ・ディスプレイ・システム
WO2007108183A1 (fr) * 2006-03-22 2007-09-27 Sharp Kabushiki Kaisha Dispositif d'affichage a cristaux liquides et recepteur de television
JP2011158697A (ja) * 2010-02-01 2011-08-18 Asahi Kasei Corp 拡散シート及びマルチレイヤーディスプレイ
JP2013011672A (ja) * 2011-06-28 2013-01-17 Canon Inc 偏光変調装置および画像投射装置
JP2013190636A (ja) * 2012-03-14 2013-09-26 Seiko Epson Corp 波長分離装置、プロジェクター、及び画像表示システム

Similar Documents

Publication Publication Date Title
JP6620534B2 (ja) 表示装置
US9091860B2 (en) Spatially modifying polarization state of light
JP4582349B2 (ja) 表示装置
KR20120023627A (ko) 고 동적 범위 투사 시스템
US8259125B2 (en) Method for color signal gamut mapping and saturation boosting
CN101547328B (zh) 图像处理装置、图像显示装置及图像处理方法
US20120127287A1 (en) Optical compensation for ghosting in stereoscopic displays
US20170374328A1 (en) Display device
JP2009159371A (ja) 画像調整装置、画像表示システム及び画像調整方法
US10142600B2 (en) Display device
JP2007240931A (ja) 画像表示装置及びプロジェクタ
WO2016151975A1 (fr) Dispositif d'affichage
JP6601192B2 (ja) 表示装置
WO2016143236A1 (fr) Dispositif d'affichage
WO2016143237A1 (fr) Dispositif d'affichage
JP2011150111A (ja) 画像処理装置、画像表示システム及び画像処理方法
US12081917B2 (en) Projection system and method for uniformity correction
JP2004233813A (ja) 色むら補正画像処理装置、方法及びプログラム、並びに投射型画像表示装置
JP6314439B2 (ja) 表示装置、及び、表示装置の制御方法
JP2009156900A (ja) 画質変換ユニット
JP2019041189A (ja) 画像投射装置およびその制御方法
JP2008090239A (ja) 投射型画像表示装置
WO2010109633A1 (fr) Dispositif et procédé de correction d'inégalité de couleur
JP2009086163A (ja) 画像表示装置
JP2007293140A (ja) 画像表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16761215

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16761215

Country of ref document: EP

Kind code of ref document: A1