WO2017149562A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2017149562A1
WO2017149562A1 PCT/JP2016/001110 JP2016001110W WO2017149562A1 WO 2017149562 A1 WO2017149562 A1 WO 2017149562A1 JP 2016001110 W JP2016001110 W JP 2016001110W WO 2017149562 A1 WO2017149562 A1 WO 2017149562A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
transparent member
crystal panel
display device
crystal display
Prior art date
Application number
PCT/JP2016/001110
Other languages
English (en)
Japanese (ja)
Inventor
康 江尻
久保田　孝介
Original Assignee
パナソニックＩｐマネジメント株式会社
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
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to PCT/JP2016/001110 priority Critical patent/WO2017149562A1/fr
Publication of WO2017149562A1 publication Critical patent/WO2017149562A1/fr

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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
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods

Definitions

  • the present invention relates to a liquid crystal display device.
  • the head-up display device includes a liquid crystal panel that transmits light emitted from a light source (hereinafter referred to as light source light). And in order to improve a user's visibility, the brightness
  • a transmission surface the surface of the liquid crystal panel
  • Patent Document 1 As a technique for solving such overheating of the transmission surface, for example, there is a technique disclosed in Patent Document 1 (hereinafter referred to as a conventional technique). According to this prior art, heat generated on the transmission surface of the liquid crystal panel can be radiated by providing a Peltier element at the end of the liquid crystal panel.
  • the heat is highest at the central portion of the transmission surface. Moreover, since the thermal conductivity of the liquid crystal panel is low, the heat at the central portion of the transmission surface is difficult to spread around. For this reason, the conventional technology including a Peltier element at the end of the liquid crystal panel cannot sufficiently dissipate heat.
  • An object of the present invention is to provide a liquid crystal display device capable of suppressing overheating in the central portion of the transmission surface of the liquid crystal panel.
  • a liquid crystal display device covers a liquid crystal panel that transmits light from a light source and at least a central portion of the light transmission surface of the liquid crystal panel, and is in contact with at least one of the transmission surfaces.
  • a transparent member that has a higher thermal conductivity than the liquid crystal panel and transmits the light; and a heat sink that is provided in contact with an end of the transparent member and that has a higher thermal conductivity than the transparent member.
  • FIG. 1 is an exploded perspective view and an assembled perspective view of a liquid crystal display device according to an embodiment of the present invention.
  • Side sectional view and top view of a liquid crystal display device according to an embodiment of the present invention Assembly perspective view and top view according to Modification 2 of the embodiment of the present invention
  • the top view which concerns on the modification 2 of embodiment of this invention
  • the transparent member and the liquid crystal panel are joined, the transparent member and the heat sink are joined, and the heat generated in the central portion of the transmission surface of the liquid crystal panel is transferred to the transparent member. It aims at suppressing the overheating in the center part of the permeation
  • FIG. 1A is an exploded perspective view of the liquid crystal display device 100
  • FIG. 1B is an assembled perspective view of the liquid crystal display device 100.
  • the liquid crystal display device 100 is provided in a head-up display device, for example. As illustrated in FIG. 1A, the liquid crystal display device 100 includes a heat sink 1, a transparent member 2, and a liquid crystal panel 3.
  • the heat sink 1 is made of a metal (for example, aluminum) having a thermal conductivity higher than that of the transparent member 2 described later.
  • the heat sink 1 has an opening 10 through which light source light L from a light source (not shown) passes.
  • the light source light L passes through the opening 10 and passes through the transparent member 2 and the liquid crystal panel 3.
  • the heat sink 1 is provided with bowl-shaped holding members 11a, 11b, 11c, and 11d on a surface facing the transparent member 2 (hereinafter referred to as a member facing surface).
  • These holding members 11a to 11d are made of resin, for example.
  • the holding members 11a to 11d hold the transparent member 2 and the liquid crystal panel 3 as shown in FIG. 1B. At this time, the bent portions of the holding members 11a to 11d do not block the light source light L passing through the opening 10.
  • the number of holding members is four, but the number is not limited to this.
  • the transparent member 2 is a plate-like member that transmits the light source light L and has a higher thermal conductivity than the liquid crystal panel 3.
  • the transparent member 2 is comprised, for example with glass, it is not limited to this.
  • the area of the surface of the transparent member 2 facing the heat sink 1 (hereinafter referred to as the first surface of the transparent member 2) is larger than the area of the opening 10 of the heat sink 1. Then, as shown in FIG. 1B, the transparent member 2 has a peripheral portion (end portion) of the first surface bonded (adhered) to the member facing surface of the heat sink 1.
  • the area of the transmission surface of the light source light L in the transparent member 2 is equal to the area of the opening 10. Moreover, the area of the 1st surface of the transparent member 2 and its back surface (henceforth the 2nd surface of the transparent member 2) is equal.
  • the liquid crystal panel 3 includes a liquid crystal cell and a pair of polarizing plates that sandwich the liquid crystal cell.
  • the liquid crystal panel 3 has a plate shape like the transparent member 2.
  • the area of the surface of the liquid crystal panel 3 facing the transparent member 2 (hereinafter referred to as the first surface of the liquid crystal panel 3) is the same as the area of the first surface of the transparent member 2.
  • the liquid crystal panel 3 has a first surface bonded (adhered) to the second surface of the transparent member 2.
  • the area of the transmission surface of the light source light L in the liquid crystal panel 3 is equal to the area of the opening 10. Therefore, the area of the transmission surface of the liquid crystal panel 3 is equal to the area of the transmission surface of the transparent member 2. Moreover, the area of the 1st surface of the liquid crystal panel 3 and its back surface (henceforth the 2nd surface of the liquid crystal panel 3) is equal.
  • the light source light L passes through the opening 10 of the heat sink 1, passes through the transparent member 2 and the liquid crystal panel 3, and passes through a reflecting mirror (not shown). Later, for example, it is displayed as a virtual image on the windshield of the vehicle.
  • FIG. 2A is a cross-sectional view taken along the line A-A ′ shown in FIG. 1B
  • FIG. 2B is a top view of the liquid crystal display device 100.
  • Heat is generated on the transmission surface of the liquid crystal panel 3 (region surrounded by a dotted line in FIG. 2B) due to the transmission of the light source light L.
  • the transparent member 2 having a higher thermal conductivity than the liquid crystal panel 3 is joined to the liquid crystal panel 3, and the heat sink 1 having a higher thermal conductivity than the transparent member 2 is used as the transparent member 2. Therefore, the heat generated in the central part M of the transmission surface reaches the heat sink 1 through the transparent member 2 as indicated by an arrow B.
  • FIG. 2B only four arrows B are shown, but in reality, the heat of the central portion M spreads radially from the central portion M and reaches the heat sink 1.
  • the area of the first surface (second surface) of the transparent member 2 and the area of the first surface (second surface) of the liquid crystal panel 3 are the same size, but the present invention is not limited to this.
  • the area of the first surface of the liquid crystal panel 3 may be smaller than the area of the first surface of the transparent member 2. Thereby, the heat generated on the transmission surface of the liquid crystal panel 3 can be effectively dissipated.
  • a frame member may be provided around the first surface of the liquid crystal panel 3 so that the holding members 11a to 11d can simultaneously hold the transparent member 2 and the liquid crystal panel 3.
  • the area of the transmission surface of the transparent member 2 and the area of the transmission surface of the liquid crystal panel 3 are the same size, but the present invention is not limited to this.
  • the transparent surface of the transparent member covers the central portion of the transparent surface of the liquid crystal panel 3, the area of the transparent surface of the transparent member may be smaller than the area of the transparent surface of the liquid crystal panel. This specific example will be described below with reference to FIG.
  • FIG. 3A is a perspective view of the liquid crystal display device 100 according to this modification
  • FIG. 3B is a top view of the liquid crystal display device 100 shown in FIG. 3A. 3A and 3B, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.
  • the transparent member 4 shown in FIGS. 3A and 3B is a member having the same properties as the transparent member 2 described above, and is different only in size.
  • the transparent member 4 is held by the holding member 11 a of the heat sink 1.
  • the first surface of the transparent member 4 is bonded to the member facing surface of the heat sink 1, and the second surface of the transparent member 4 is bonded to the first surface of the liquid crystal panel 3.
  • the transparent surface of the transparent member 4 covers the central portion M of the transparent surface of the liquid crystal panel 3. Therefore, the heat of the central portion M reaches the heat sink 1 through the transparent member 4.
  • the light source light L (not shown) that passes through the opening 10 of the heat sink 1 passes through the transparent member 4 and then enters the liquid crystal panel 3, and the direct liquid crystal panel. Divided into those entering 3 At this time, it is desirable to arrange the peripheral portion of the transparent surface of the transparent member 4 so as to be located in a region where no image is displayed.
  • the material cost of the transparent member 4 can be reduced.
  • the transparent member 5 shown in FIG. 4A or the transparent member 6 shown in FIG. 4B may be used. In these cases, the heat of the central portion M is conducted in more directions compared to the configuration of FIG.
  • FIG. 3 In the above embodiment, as shown in FIG. 2A, only the peripheral portion of the first surface of the transparent member 2 is joined to the member facing surface of the heat sink 1, but the present invention is not limited to this.
  • a heat sink 7 shown in FIG. 5 may be used.
  • the heat sink 7 in addition to the peripheral portion of the first surface of the transparent member 2, the heat sink 7 includes a peripheral portion of the second surface of the transparent member 2 and a side surface portion (the first surface and the first surface of the transparent member 2). A surface perpendicular to the two surfaces).
  • the transparent member 2 was set as the structure joined only to the 1st surface of the liquid crystal panel 3, it is not limited to this.
  • two transparent members 2 may be used.
  • the transparent member 2 is bonded to both the first surface and the second surface of the liquid crystal panel 3.
  • the heat sink 8 shown in FIG. 6 is joined to each transparent member 2 so that the joining area of each transparent member 2 and the heat sink 8 becomes large like the modification 3. Further, the heat sink 8 holds the two transparent members 2 and the liquid crystal panel 3 simultaneously.
  • the transparent member 2 may have a function which cuts an ultraviolet-ray. Therefore, since the ultraviolet-ray contained in the light source light L is cut by the transparent member 2, the heat_generation
  • the present invention is useful for a liquid crystal display device that transmits light emitted from a light source.

Abstract

L'invention concerne un dispositif d'affichage à cristaux liquides (100) qui est pourvu : d'un panneau à cristaux liquides (3) transmettant la lumière émise par une source lumineuse ; d'un élément transparent (2) recouvrant au moins une partie centrale d'une surface de transmission de lumière du panneau à cristaux liquides (3) et situé de manière à être en contact avec au moins une des surfaces de transmission, ledit élément transparent présentant une conductivité thermique supérieure à celle dudit panneau à cristaux liquides (3) et transmettant la lumière ; et d'un dissipateur thermique (1) situé de manière à être en contact avec une partie terminale de l'élément transparent (2) et présentant une conductivité thermique supérieure à celle de cet élément transparent (2). La chaleur générée à l'emplacement de la partie centrale de la surface de transmission du panneau à cristaux liquides (3) est transférée vers le dissipateur thermique (1) par l'intermédiaire de l'élément transparent (2).
PCT/JP2016/001110 2016-03-01 2016-03-01 Dispositif d'affichage à cristaux liquides WO2017149562A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/001110 WO2017149562A1 (fr) 2016-03-01 2016-03-01 Dispositif d'affichage à cristaux liquides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/001110 WO2017149562A1 (fr) 2016-03-01 2016-03-01 Dispositif d'affichage à cristaux liquides

Publications (1)

Publication Number Publication Date
WO2017149562A1 true WO2017149562A1 (fr) 2017-09-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115611A1 (fr) * 2020-10-26 2022-04-29 Valeo Comfort And Driving Assistance Dispositif d’assemblage adapté pour assembler un écran avec un élément partiellement transparent et afficheur tête haute comprenant un tel dispositif

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11231277A (ja) * 1998-02-12 1999-08-27 Sharp Corp 液晶プロジェクター
JP2004085943A (ja) * 2002-08-27 2004-03-18 Seiko Epson Corp 光学装置、この光学装置を備えた光学ユニットおよびプロジェクタ
JP2004294894A (ja) * 2003-03-27 2004-10-21 Seiko Epson Corp 実装ケース入り電気光学装置及び投射型表示装置並びに実装ケース

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11231277A (ja) * 1998-02-12 1999-08-27 Sharp Corp 液晶プロジェクター
JP2004085943A (ja) * 2002-08-27 2004-03-18 Seiko Epson Corp 光学装置、この光学装置を備えた光学ユニットおよびプロジェクタ
JP2004294894A (ja) * 2003-03-27 2004-10-21 Seiko Epson Corp 実装ケース入り電気光学装置及び投射型表示装置並びに実装ケース

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115611A1 (fr) * 2020-10-26 2022-04-29 Valeo Comfort And Driving Assistance Dispositif d’assemblage adapté pour assembler un écran avec un élément partiellement transparent et afficheur tête haute comprenant un tel dispositif
WO2022090233A1 (fr) * 2020-10-26 2022-05-05 Valeo Comfort And Driving Assistance Dispositif d'assemblage adapté pour assembler un écran avec un élément partiellement transparent et afficheur tête haute comprenant un tel dispositif

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