WO2004099867A1 - Panneau afficheur a cristaux liquides et projecteur a cristaux liquides - Google Patents

Panneau afficheur a cristaux liquides et projecteur a cristaux liquides Download PDF

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Publication number
WO2004099867A1
WO2004099867A1 PCT/KR2004/001091 KR2004001091W WO2004099867A1 WO 2004099867 A1 WO2004099867 A1 WO 2004099867A1 KR 2004001091 W KR2004001091 W KR 2004001091W WO 2004099867 A1 WO2004099867 A1 WO 2004099867A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
metal clips
display panel
crystal cells
crystal display
Prior art date
Application number
PCT/KR2004/001091
Other languages
English (en)
Inventor
Soon-Mok Kwon
Original Assignee
Iljin Diamond Co., Ltd
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 Iljin Diamond Co., Ltd filed Critical Iljin Diamond Co., Ltd
Publication of WO2004099867A1 publication Critical patent/WO2004099867A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/30—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for compartments other than passenger or driving compartments, e.g. luggage or engine compartments
    • 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]
    • H04N9/3141—Constructional details thereof
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/11—Passenger cars; Automobiles
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133311—Environmental protection, e.g. against dust or humidity
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/02—Function characteristic reflective
    • 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
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells

Definitions

  • the present invention generally relates to a liquid crystal display panel and a liquid crystal projector, and more specifically, to a liquid crystal display panel and a liquid crystal projector for reducing lightness irradiated per unit surface area of metal clips by sloping the metal clips fixing liquid crystal cells to cases toward a direction in which light is incident on.
  • a liquid crystal projector is a display device using characteristics of a liquid crystal, changing an array of the liquid crystal by applying an electric field to liquid crystal cells formed when injecting the liquid crystal between 2 thin substrates. Light irradiated on a liquid crystal display panel is transmitted or cut off according to array changes of the liquid crystal reacting to the electric field applied outside, thereby forming an image. The formed image is expanded by using an optical system including a projection lens and is projected on a screen.
  • the liquid crystal display panel used in the liquid crystal projector is a switching element, cutting off or transmitting light in pixel unit by using a thin film transistor.
  • Such thin film transistor has a fast responsive speed and easily implements high integration.
  • the liquid crystal display panel consists of the liquid crystal cells for cutting off or transmitting light and cases for fixing positions of the liquid crystal cells.
  • the liquid crystal cells are inserted into the cases, and are fixed to the cases by metal clips.
  • Fig. 1 is a diagram illustrating a sectional view of a liquid crystal display panel of prior art
  • the liquid crystal panel consists of liquid crystal cells and cases(4).
  • the liquid crystal cells are inserted into the cases(4), and are fixed to the cases(4) by metal clips(6).
  • the liquid crystal cells consist of an upper substrate(l), a lower substrate(2), and a liquid crystal layer(not shown) injected between them.
  • the liquid crystal c ells further comprise an anti-dust grass(3-l) attached to an upper part of the upper substrate(l), and comprises an anti-dust grass(3-2) in a lower part of the lower substrate(2) when necessary.
  • a switching element (commonly, thin film transistor) is formed on the lower substrate(2), a pixel electrode is formed thereon, and a scanning signal and a data signal applied outside are transmitted to the thin film transistor.
  • An opposite electrode opposite to the pixel electrode is comprised on the upper substrate(l).
  • the liquid crystal display panel controls on/off operations of the liquid crystal layer by using an electric field formed by a voltage difference applied between the pixel electrode and the opposite electrode.
  • the anti-dust grass(3-l) attached to the upper part of the upper substrate(l) prevents foreign substance from being attached to the upper substrate(l), and attaches the foreign substance to the anti-dust grass(3-l) instead of the upper substrate(l), thereby enabling the attached foreign substance to be out of focus on a projection lens. Therefore, the foreign substance is not projected on the projection lens to a degree that the foreign substance is easily seen on a screen.
  • the anti-dust grass(3-2) attached to the lower part of the lower substrate(2) prevents foreign substance from being attached to the lower substrate(2).
  • Such liquid crystal cells are inserted into the cases(4), and the metal clips(6) are disposed in an upper part thereof.
  • the metal clips(6) are coupled together on sides of the cases(4), and are extended to stretch over edges of the anti-dust grass(301), preventing the liquid crystal cells from being separated from the cases(4).
  • the metal clips(6) are disposed vertical to incident light, causing a lot of heat since the incident light reaching the metal clips(6) is increased.
  • an area ratio of the metal clips(6) compared to an entire surface area of the anti-dust grass(3-l) is about between 5% and 10% according to manufacturers.
  • the metal clips(6) emit much heat than the liquid crystal cells by the incident light owing to material differences between the metal clips(6) and the liquid crystal cells. Thus, there is a problem of applying much heat to edges of the liquid crystal cells contacted with the metal clips(6).
  • [14] 1 is therefore an object of the present invention to provide a liquid crystal display panel and a liquid crystal projector for preventing local temperature of metal clips from getting higher through reduction of energy concentrated on the metal clips, by sloping the metal clips for fixing liquid crystal cells to cases toward a direction in which light is irradiated and forming the metal clips with light reflecting materials.
  • [15] 1 is another object of the present invention to provide a liquid crystal display panel and a liquid crystal projector for preventing light from being diffusively reflected on metal clips.
  • a liquid crystal display panel in accordance with the present invention comprises: a liquid crystal layer formed between an upper substrate and a lower substrate; liquid crystal cells where an anti-dust grass is attached to an upper part of the upper substrate; cases receiving the liquid crystal cells; and metal clips whose one section is connected to the cases and the other section is contacted with edges of the liquid crystal cells, fixing the liquid crystal cells to the cases. And, ends of the metal clips slope down at predetermined angles
  • the liquid crystal display panel comprises: a liquid crystal layer formed between an upper substrate and a lower substrate; liquid crystal cells where an anti-dust grass is attached to an upper part of the upper substrate; cases receiving the liquid crystal cells; and metal clips whose one section is connected to the cases and the other section is contacted with edges of the liquid crystal cells, fixing the liquid crystal cells to the cases. And ends of the metal clips slope down at predetermined angles.
  • FIG. 1 is a diagram illustrating a sectional view of a liquid crystal display panel of prior art
  • FIG. 2 is a diagram illustrating a sectional view of a liquid crystal display panel in accordance with the present invention
  • FIG. 3 is a diagram illustrating that contacted parts of metal clips and liquid crystal cells are expanded;
  • Fig. 4 is a diagram illustrating an optical system of a liquid crystal projector using a liquid crystal display panel in accordance with the present invention.
  • Fig. 5 is an explanatory diagram explaining relations between light receiving angles of an A' part of Fig. 3 and inclination angles of metal clips.
  • FIG. 2 is a diagram illustrating a sectional view of a liquid crystal display panel in accordance with the present invention
  • Fig. 3 is a diagram illustrating that contacted parts of metal clips and liquid crystal cells are expanded. The present invention will now be described as follows in reference to Fig. 2 and Fig. 3.
  • the liquid crystal display panel consists of liquid crystal cells and cases(14), and the liquid crystal cells are inserted into the cases(14), and are fixed to the cases(14) by metal clips( 16).
  • the liquid crystal cells consist of an upper substrate(l 1), a lower substrate(12), and a liquid crystal layer(not shown) injected between them. Commonly, the liquid crystal cells further comprise an anti-dust grass(13-l) attached to an upper part of the upper substrate(l 1), and comprise an anti-dust grass(13-2) in a lower part of the lower substrate(12) when necessary.
  • a switching element (commonly, thin film transistor) is formed on the lower substrate(12), a pixel electrode is formed thereon, and a scanning signal and a data signal are transmitted to the thin film transistor outside.
  • An opposite electrode opposite to the pixel electrode is comprised on the upper substrate(l 1).
  • the liquid crystal display panel controls on/off operations of the liquid crystal layer by using an electric field formed by voltage differences applied between the pixel electrode and the opposite electrode.
  • the anti-dust grass( 13-1) attached to the upper part of the upper substrate( 11 ) prevents foreign substance from being attached to the upper substrate(l 1), and attaches the foreign substance to the anti-dust grass(13-l) instead of the upper substrate(l 1), thereby enabling the attached foreign substance to be out of focus on a projection lens. Therefore, the foreign substance is not projected on the projection lens to a degree that the foreign substance is easily seen on a screen.
  • the anti-dust grass(13-2) attached to the lower part of the lower substrate(12) prevents foreign substance from being attached to the lower substrate(12). Like shown in Fig. 2, the anti-dust grasses(13- 1,13-2) are thicker than the upper substrate(l 1) or the lower substrate(12).
  • the liquid crystal display panel(l ⁇ ) consisting of the liquid crystal cells and the cases(14) uses the metal clips(16) in order to fix the liquid crystal cells to the cases(14).
  • the metal clips(16) are contacted with edges of the anti-dust grass(13-l) of the liquid crystal cells, fixing the liquid crystal cells to the cases(14). Ends of the metal clips(16) are bent down to slope. Since the ends of the metal clips(16) slope down, lightness irradiated per unit surface area is reduced at the sloping ends of the metal clips(16), compared to ends of prior metal clips(6) illustrated in Fig. 1 that are flatly formed. In addition, it can reduce areas of the metal clips(16) directly contacted with the liquid crystal cells, thereby transmitting a portion of heat only generated from the metal clips(16) to the liquid crystal cells.
  • the metal clips(16) are made of light reflecting materials
  • light irradiated on the metal clips(16) is reflected.
  • the light reflecting materials can include various metal materials such as aluminum, nickel, etc.
  • ends of the metal clips(16) bend down at predetermined angles, thereby reflecting vertically incident light on the metal clips(16).
  • the light proceeds in a direction parallel to surfaces of the liquid crystal cells.
  • a black matrix(17) is located in a line vertically extended toward the liquid crystal cells at the ends of the sloping metal clips(16).
  • a black matrix(17) is located in a line vertically extended toward the liquid crystal cells at the ends of the sloping metal clips(16).
  • the black matrix(17) is formed on the upper substrate(l 1) or the lower substrate(12) of the liquid crystal cells, and more desirably, it is formed on the lower substrate(12).
  • FIG. 4 is a system format diagram of a liquid crystal projector using a liquid crystal display panel in accordance with the present invention
  • Fig. 5 is a diagram illustrat ing angles of metal clips in an A' part of Fig. 3 and light receiving angles.
  • the present invention will now be described as follows in reference to Fig. 4 and Fig. 5.
  • An optical system of the liquid crystal projector has a first fly eye lens(21) and a second fly eye lens (hereinafter, 'FEL)(22) and a liquid crystal display panel(l ⁇ ).
  • the FEL is a device for condensing light and converting the light into parallel light, and can be replaced with a glass rod condenser, a mirror tunnel condenser, etc.
  • Fig. 5 is an explanatory diagram for explaining relations between light receiving angles of an A' part of Fig. 3 and inclination angles of metal clips.
  • a light receiving angle ' 0 1' shows a maximum angle between light incident on liquid crystal cells and a vertical line
  • a light receiving angle ' 0 2' illustrates angles at which metal clips(16) bend down from the vertical line.
  • the light receiving angle ' 0 2' bigger than the light receiving angle ' 0 1 * it can cut off light incident on edges of liquid crystal cells by the metal clips(16).
  • metal clips for fixing liquid crystal cells to cases slope at more than predetermined angles, thereby reducing lightness irradiated per unit surface area of the metal clips. Therefore, it can minimize thermal energy produced from the metal clips.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Physics (AREA)
  • Projection Apparatus (AREA)

Abstract

La présente invention concerne d'une façon générale un panneau afficheur à cristaux liquides et un projecteur à cristaux liquides. Le panneau afficheur à cristaux liquides de cette invention comprend: une couche de cristaux liquides formée entre un substrat supérieur et un substrat inférieur, des cellules de cristaux liquides sur lesquelles une couche anti-poussière est fixée sur une partie supérieure du substrat supérieur, des boîtiers de réception des cellules de cristaux liquides et des pinces métalliques dont une section est mise en contact avec les bords des cellules de cristaux liquides, fixant ces cellules de cristaux liquide dans les boîtiers. Des extrémités de ces pinces métalliques forment une pente descendante à des angles prédéterminés.
PCT/KR2004/001091 2003-05-12 2004-05-12 Panneau afficheur a cristaux liquides et projecteur a cristaux liquides WO2004099867A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0029809 2003-05-12
KR1020030029809A KR20040097496A (ko) 2003-05-12 2003-05-12 액정 디스플레이 패널 및 액정 프로젝터

Publications (1)

Publication Number Publication Date
WO2004099867A1 true WO2004099867A1 (fr) 2004-11-18

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Application Number Title Priority Date Filing Date
PCT/KR2004/001091 WO2004099867A1 (fr) 2003-05-12 2004-05-12 Panneau afficheur a cristaux liquides et projecteur a cristaux liquides

Country Status (2)

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KR (1) KR20040097496A (fr)
WO (1) WO2004099867A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990029517A (ko) * 1997-09-11 1999-04-26 야스카와 히데아키 전기 광학 장치와 그 제조 방법 및 투사형 표시 장치
KR20010039892A (ko) * 1999-09-16 2001-05-15 미야사카 가츠로 전자 기판 유니트 상의 2 세트의 전극 단자 어레이를전기적으로 접속시키기 위한 방법
WO2002069018A1 (fr) * 2001-02-27 2002-09-06 Seiko Epson Corporation Systeme optique d'eclairage et projecteur utilisant ce dernier
WO2002069000A1 (fr) * 2001-02-27 2002-09-06 Seiko Epson Corporation Filtre a film multicouche et procede de production de celui-ci, filtre eliminateur d'uv, verre etanche aux poussieres, panneau d'affichage et unite d'affichage du type a projection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990029517A (ko) * 1997-09-11 1999-04-26 야스카와 히데아키 전기 광학 장치와 그 제조 방법 및 투사형 표시 장치
KR20010039892A (ko) * 1999-09-16 2001-05-15 미야사카 가츠로 전자 기판 유니트 상의 2 세트의 전극 단자 어레이를전기적으로 접속시키기 위한 방법
US6296493B1 (en) * 1999-09-16 2001-10-02 Shin-Etsu Polymer Co., Ltd. Method for electrically connecting two sets of electrode terminals in array on electronic board units
WO2002069018A1 (fr) * 2001-02-27 2002-09-06 Seiko Epson Corporation Systeme optique d'eclairage et projecteur utilisant ce dernier
WO2002069000A1 (fr) * 2001-02-27 2002-09-06 Seiko Epson Corporation Filtre a film multicouche et procede de production de celui-ci, filtre eliminateur d'uv, verre etanche aux poussieres, panneau d'affichage et unite d'affichage du type a projection
KR20020084155A (ko) * 2001-02-27 2002-11-04 세이코 엡슨 가부시키가이샤 조명 광학계 및 그것을 이용한 프로젝터

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Publication number Publication date
KR20040097496A (ko) 2004-11-18

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