WO2016143237A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2016143237A1
WO2016143237A1 PCT/JP2016/000077 JP2016000077W WO2016143237A1 WO 2016143237 A1 WO2016143237 A1 WO 2016143237A1 JP 2016000077 W JP2016000077 W JP 2016000077W WO 2016143237 A1 WO2016143237 A1 WO 2016143237A1
Authority
WO
WIPO (PCT)
Prior art keywords
video signal
liquid crystal
light
crystal panel
projection unit
Prior art date
Application number
PCT/JP2016/000077
Other languages
English (en)
Japanese (ja)
Inventor
亮佑 中越
Original Assignee
株式会社Ｊｖｃケンウッド
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 JP2015235423A external-priority patent/JP6733162B2/ja
Application filed by 株式会社Ｊｖｃケンウッド filed Critical 株式会社Ｊｖｃケンウッド
Publication of WO2016143237A1 publication Critical patent/WO2016143237A1/fr
Priority to US15/700,020 priority Critical patent/US10142600B2/en

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Classifications

    • 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
    • G03B21/10—Projectors with built-in or built-on screen
    • 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
    • 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.
  • 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 responds to a projection unit that emits light modulated according to a first video signal composed of three primary color signals, a first screen, and a second video signal composed of three primary color signals.
  • a display unit including a transmissive liquid crystal panel that modulates and emits incident light, a polarizing plate that emits light having a predetermined polarization direction out of incident light.
  • 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
  • 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 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 300 having a size corresponding to the size of the liquid crystal panel 301 is provided.
  • 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.
  • 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 transmissive liquid crystal panel 301 may be a TN (Twisted Nematic) liquid crystal panel, a VA (Virtical Alignment) liquid crystal panel, or an IPS (In-Place-Switching) method. It may be a liquid crystal panel.
  • TN Transmission Nematic
  • VA Virtual Alignment
  • IPS In-Place-Switching
  • 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.
  • 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.
  • 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
  • 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.
  • a configuration that blocks light when the polarization direction is rotated by 90 ° by the liquid crystal When a liquid crystal panel is used, 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.

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

Abstract

L'invention concerne un dispositif d'affichage (1) comprenant : une unité de projection (20) qui émet de la lumière correspondant à un premier signal vidéo qui comprend un signal à trois couleurs primaires ; une unité d'affichage (30) qui est pourvue d'un écran (300) avec un panneau à cristaux liquides (301) de type à transmission qui, conformément à un deuxième signal vidéo qui comprend un signal à trois couleurs primaires, modifie le sens de polarisation de chacune des trois couleurs primaires de la lumière provenant de l'unité de projection (20), et avec une plaque polarisante (302) ; et une unité de commande d'affichage (50) qui génère le premier signal vidéo et le deuxième signal vidéo à partir d'un signal vidéo d'entrée qui comprend un signal à trois couleurs primaires, qui commande l'unité de projection (20) en se basant sur le premier signal vidéo, et qui délivre en sortie un signal vidéo destiné à commander le panneau à cristaux liquides (301) de type à transmission en se basant sur le deuxième signal vidéo. L'unité d'affichage (30) est configurée de telle sorte que l'écran (300), le panneau à cristaux liquides (301) de type à transmission et la plaque polarisante (302) sont disposés dans cet ordre dans la direction de l'avance de la lumière émise depuis l'unité de projection (20).
PCT/JP2016/000077 2015-03-10 2016-01-08 Dispositif d'affichage WO2016143237A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/700,020 US10142600B2 (en) 2015-03-10 2017-09-08 Display device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015047097 2015-03-10
JP2015-047097 2015-03-10
JP2015235423A JP6733162B2 (ja) 2015-03-10 2015-12-02 表示装置
JP2015-235423 2015-12-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/700,020 Continuation US10142600B2 (en) 2015-03-10 2017-09-08 Display device

Publications (1)

Publication Number Publication Date
WO2016143237A1 true WO2016143237A1 (fr) 2016-09-15

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PCT/JP2016/000077 WO2016143237A1 (fr) 2015-03-10 2016-01-08 Dispositif d'affichage

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WO (1) WO2016143237A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04204591A (ja) * 1990-11-30 1992-07-24 Toshiba Corp 投射型液晶表示装置
WO2007108183A1 (fr) * 2006-03-22 2007-09-27 Sharp Kabushiki Kaisha Dispositif d'affichage a cristaux liquides et recepteur de television
JP2009042454A (ja) * 2007-08-08 2009-02-26 Hitachi Ltd 液晶表示装置とそのための背面光投射ユニット、並びに、かかる液晶表示装置を利用した電子黒板装置
JP2009081645A (ja) * 2007-09-26 2009-04-16 Hitachi Ltd 映像表示装置
JP2011076107A (ja) * 2005-09-30 2011-04-14 Sharp Corp 液晶表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04204591A (ja) * 1990-11-30 1992-07-24 Toshiba Corp 投射型液晶表示装置
JP2011076107A (ja) * 2005-09-30 2011-04-14 Sharp Corp 液晶表示装置
WO2007108183A1 (fr) * 2006-03-22 2007-09-27 Sharp Kabushiki Kaisha Dispositif d'affichage a cristaux liquides et recepteur de television
JP2009042454A (ja) * 2007-08-08 2009-02-26 Hitachi Ltd 液晶表示装置とそのための背面光投射ユニット、並びに、かかる液晶表示装置を利用した電子黒板装置
JP2009081645A (ja) * 2007-09-26 2009-04-16 Hitachi Ltd 映像表示装置

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