WO2003052504A1 - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
WO2003052504A1
WO2003052504A1 PCT/JP2002/012810 JP0212810W WO03052504A1 WO 2003052504 A1 WO2003052504 A1 WO 2003052504A1 JP 0212810 W JP0212810 W JP 0212810W WO 03052504 A1 WO03052504 A1 WO 03052504A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
light guide
lcd
guide plate
Prior art date
Application number
PCT/JP2002/012810
Other languages
French (fr)
Japanese (ja)
Inventor
Yasuyuki Shirato
Original Assignee
Nanox Corporation
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 Nanox Corporation filed Critical Nanox Corporation
Publication of WO2003052504A1 publication Critical patent/WO2003052504A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements
    • G02F2201/465—Snap -fit

Definitions

  • the present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device suitable for a portable display device such as a portable telephone.
  • FIG. 7 a perspective view before assembling the respective components in FIG. 7 (a) and FIG. 7 (b) a) a side cross-sectional view after assembling the parts shown in a).
  • the transparent front substrate 1 and the back substrate 2 provided with the wires forming the transparent electrode are superimposed, and the liquid crystal is contained in the pixel area divided by the seal member between the two transparent substrates 1 and 2.
  • the liquid crystal display unit (LCD) 3 enclosed and metal copper wires 5 and 6 connected to the wiring from the liquid crystal display unit 3 are formed on a circuit board 7 made of a synthetic resin film such as polyimide resin, Connect the LSI (IC) 8 that controls the conduction of the transparent pixel electrode of the liquid crystal display unit 3 in the area where the metal copper wires 5 and 6 are assembled via an ACF (Anisotropic Conductive Film) (not shown)
  • the circuit board portion 9 is composed of Both the substrates 1 and 2 are made of transparent glass or transparent resin plate.
  • the wiring of the LSI (IC) 8 on the circuit board portion 9 is connected to the power supply side via an anisotropic conductive film (not shown) or the like, but in the configuration shown in FIG. Since it is on a synthetic resin film, it may be called a chip on film module.
  • LCM shown in FIG. 7 is an example in which the light guide plate 11 is used as a backlight of the LCD 3, and the L CD 3 and the circuit board portion 9 are integrated to overlap the light guide plate 11.
  • the light guide plate 1 1 is mounted on a substrate 13 together with a light source 12 such as an LED, a cold cathode tube, etc. Visible light is reflected on the side surface of the substrate 13 on the light guide plate 1 1 side. Coating or tape to cover the
  • Fig. 8 shows a side view of the case where two LCDs 3 and 3 'are attached to one LCM product, for example, when the main LCD and the back LCD are attached to a mobile phone.
  • the light guide plates 1 1 1 1 1 1 1 ′ and the light sources 12 12 ′ are mounted on the respective LCDs 3 3 ′, so that the configuration is bulky.
  • both may be pasted together with a double-sided tape or FIG.
  • the light guide plate 21 of the backlight unit is provided with the claws 21a and 21b, and the L CD 3 is fixed by the claws 21a and 21b.
  • the prior art liquid crystal display shown in FIGS. 7 and 8 has the following disadvantages. In order to mount one backlight unit on one LCD 3, two backlight units are made for one liquid crystal display product, which increases the cost of molding and materials, and the mounting volume increases.
  • the object of the present invention is to reduce the cost and size of the liquid crystal display device having two or more L CDs or L CMs attached to the back light, and to reduce the size. It is to provide a product that is easy to assemble and has no rattling. Disclosure of the invention
  • the first substrate provided with the pixel electrode and the second substrate provided with the opposite pixel electrode are superimposed so that the both electrodes are disposed opposite to each other, and the first substrate and the second substrate Provided with two liquid crystal display units (LCDs) in which liquid crystal is sealed in a pixel region between them, a light guide plate sandwiched between two liquid crystal display units (LCDs), and a light source arranged at an end of the light guide plate Liquid crystal display device.
  • LCDs liquid crystal display units
  • LCDs liquid crystal display units
  • a light guide plate sandwiched between two liquid crystal display units (LCDs)
  • a light source arranged at an end of the light guide plate Liquid crystal display device.
  • the light guide plate may be made of a pair of light guide materials respectively corresponding to the liquid crystal display units (LCDs), and a reflection plate may be disposed between the pair of light guide plates. Further, the light guide plate can be configured to have a fixed claw and a movable claw with an inclined portion for sandwiching each liquid crystal display unit (LCD). According to the present invention, two LCDs or LCDs provided on the front and back sides can be simultaneously irradiated with light from a backlight unit comprising a light source and a light guide plate. In addition, the area and man-hours for mounting the light source can be reduced.
  • the light guide plate is made of a pair of light guide materials respectively corresponding to the liquid crystal display units (LCD), and backlight performance can be effectively exhibited by arranging a reflection plate between the pair of light guide plates.
  • LCD liquid crystal display units
  • this backlight type liquid crystal display device uses a backlight unit having a claw with a sloping portion that does not produce rattling noise in order to fix the LCD or LCM, the backlight and the LCD 3 or LCM Even if foreign matter gets in between, it can be easily reassembled.
  • FIG. 1 is a perspective view showing a configuration before assembly of a light guide plate for mounting two L CDs according to the embodiment of the present invention on the front and back surfaces.
  • Fig. 2 is a perspective view of the light guide plate of Fig. 1 after assembly (Fig. 2 (a)) and A-A of Fig. 2 (a). It is a line cross-sectional view (FIG. 2 (b)).
  • FIG. 3 is a perspective view showing a configuration before assembly in the case of disposing the LCD on the wedge surface of the backlight unit shown in FIG. 1 and FIG.
  • FIG. 4 is a sectional view taken along line A-A of FIG.
  • FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 2 (a).
  • FIG. 6 is an enlarged cross-sectional view of a backlight unit portion according to the embodiment of the present invention.
  • FIG. 7 is a perspective view (FIG. 7 (a)) and a side sectional view after assembly (FIG. 7 (b)) showing the process of attaching the prior art L CD to the backlight unit.
  • FIG. 8 is a side sectional view of a liquid crystal display of the prior art.
  • FIG. 9 is a side sectional view of an essential part of a liquid crystal display device of the prior art.
  • the perspective view of FIG. 1 is a view showing a configuration before assembling the light guide plates 15 and 15 'for mounting two L CDs on the front and back surfaces.
  • the reflector 16 is sandwiched between the two light guide plates 15 and 15 ', and they are superimposed to integrate the two light guide plates 15 and 15' as shown in the perspective view of FIG. 2 (a). .
  • FIG. 2 (b) when the cross section along line A--A in FIG. 2 (a) is seen, a light source supported by the printed circuit board 17 on one side of the light guide plate 15 or 15 '. 12 will be placed (print board 17 not shown in Fig. 2 (a)).
  • Fig. 5 shows an enlarged view of the cross section along line B- B in Fig. 2 (a).
  • Fig. 5 shows a side view with the LCD 3 or 3 '(or LCM) attached.
  • FIG. 3 the front substrate 1 and the back substrate 2 and the front substrate 1 ′ and the back substrate 2 ′ are superimposed on both sides of the backlight unit shown in FIGS. 1 and 2, respectively, and the both transparent substrates 1, 2 and 1 ′ are shown.
  • 2 ' show the configuration before assembly in the case of arranging the LCD 3, 3' (or LCM) in which the liquid crystal is enclosed in the pixel area divided by the seal member respectively.
  • FIG. 3 also shows circuit boards 7 and 7 on which metal copper wiring formed from LCDs 3 and 3 ′ is formed, and LSIs 8 and 8 ′ for controlling conduction of the transparent pixel electrodes of the LCDs 3 and 3 ′. It shows. As shown in FIG.
  • each light guide plate 15 and 15' can Light can be emitted evenly to each other towards the LCD 3, 3 ′ (or LCM).
  • the light guide plates 15 and 15 ' are made of a material such as acrylic resin or polycarbonate resin.
  • FIG. 4 shows a cross-sectional view taken along the line A-A of FIG. 1, but the light guide plate 15 is provided with the claws 15a and 15b for fixing the LCD 3 (or LCM) on opposite side surfaces.
  • claws 15a and 15b There are two types of claws 15a and 15b: fixed claws (not movable) 15a and movable claws 15b.
  • the fit between the LCD 3 (or LCM) and the backlight unit is improved. After fixing the LCD 3 (or LCM) to the backlight unit, there is a slight slope (arrow C in Figure 4) to prevent rattling noise.
  • the length L between the fixed claw 15 a and the movable claw 15 b (the length L shown in FIG. 4 so that the corners of the LCD 3 (or L CM) hit the inclined portions of the claws 15 a and 15 b. ) Should be designed slightly smaller than the width B of the corresponding side of LCD 3 (or LCM). Both of the claws 15a and 15b are made of the same material as the light guide plate 15 and therefore have some elasticity. Therefore, the LCD 3 (or LCM) sandwiched between both the claws 15a and 15b is always pressed in the direction of the arrow D, and the LCD 3 (or LCM) is not loose, and the claws 15a, Hold between 15 b.
  • Fig. 5 shows the shapes of the claw 15b when deformed and after being restored as dotted and solid lines, respectively.
  • the claws 21a and 21b and the LCD 3 which are produced when the LCD 3 (or LCM) is fitted between the claws 21a and 2 lb provided in the prior art backlight unit shown in FIG. There is no gap SI, S 2 between (or LCM), so no rattling noise is generated.
  • the light emission luminances of the front and back surfaces of the back light unit by adjusting the position of the light incident surface of the light guide plate 15 or 15 'of the present invention and the light source 12 (or changing the area of the light incident surface) You can also adjust the There are also more light sources In this case, it is also possible to adjust the emission brightness by adjusting the number of light sources to be lit.
  • two L CD 3 (or L) are provided between the fixed claw 19a and the movable claw 19b provided on both sides of the light guiding plate 19 shown in FIG. CM) may be inserted.
  • the LCDs 3, 3 (or L CM) provided on the front and back sides of the backlight unit consisting of one set of light sources 12 and light guide plates 15, 15 'or 19 are used. Since the display can be performed simultaneously and the area and man-hours for mounting the light source 12 can be reduced, it is possible to provide a low power consumption, low cost, and space saving back light type liquid crystal display device.
  • the liquid crystal display device of the present embodiment is suitable for a portable display device such as a portable telephone.
  • two LCDs can be displayed with a backlight consisting of one set of light source and light guide plate, the mounting area of the liquid crystal display device can be reduced, and the number of mounting steps can be reduced. , Can reduce the manufacturing cost.
  • the LCD (or LCM) It can be easily reassembled even if foreign matter gets in between the backlight unit and L CD (or LCM) that have claws that do not make rattle for fixing.

Abstract

A liquid crystal display having at least two LCDs or LCMs fitted to a back light unit. In order to provide a product which can be reduced in size, easily re-assembled, and free from any play at a low cost, a reflecting plate (16) is held between light transmission plates (15 and 15’) for mounting the two LCDs (3 and 3’) to front and back sides thereof, and these are integrally overlapped. A light source supported by a printed circuit board is disposed on one side surface of the light transmission plates (15 and 15’). An inclined part is provided on claws (15a and 15b) so that no rattling noise occurs when fixing the LCD (3) by a fixed claw (15a) and a movable claw (15b) of the light transmission plates (15 and 15’).

Description

明細書 液晶表示装置  Specification Liquid crystal display
技術分野 Technical field
本発明は、 液晶表示装置に関し、 特に携帯用電話機などの携帯用表示機器に適 した液晶表示装置に関する。 技術背景  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device suitable for a portable display device such as a portable telephone. Technology background
従来、 液晶表示装置としては透明基板間に表示用の液晶を充填した液晶表示素 子 （以下、 液晶表示部又は L CDということがある） が知られている。 LCDを L S I ( I C) で駆動する装置 （以下、 LCM又は LCモジュールということ力 ある） を図 7 (図 7 ( a ) の各部品組み立て前の斜視図と、 図 7 (b) の図 7 ( a ) に示す部品組み立て後の側面断面を見た図） に示す。  Conventionally, as a liquid crystal display device, a liquid crystal display element (hereinafter sometimes referred to as a liquid crystal display portion or an L CD) in which a liquid crystal for display is filled between transparent substrates is known. A device for driving an LCD with an LSI (IC) (hereinafter referred to as an LCM or LC module) is shown in FIG. 7 (a perspective view before assembling the respective components in FIG. 7 (a) and FIG. 7 (b) a) a side cross-sectional view after assembling the parts shown in a).
L Cモジュールは、 それぞれ透明電極を構成する配線を施した透明な表基板 1 と裏基板 2を重ね合わせ、 該両透明基板 1、 2の間にシール部材で区分された画 素領域内に液晶を封入した液晶表示部 （LCD) 3と、 該液晶表示部 3からの配 線に接続した金属銅の配線 5、 6をポリイミ ド樹脂などの合成樹脂フィルムから なる回路基板 7上に形成し、 前記金属銅の配線 5、 6を集合化した領域に、 前記 液晶表示部 3の透明画素電極の導通制御をする L S I ( I C) 8を ACF (Anis otropic Conductive Film) (図示せず） を介して接続した回路基板部 9とからな る構成である。 前記両基板 1、 2は透明ガラス又は透明樹脂板から構成される。 前記回路基板部 9上の L S I ( I C) 8の配線は異方性導電膜 （図示せず） な どを介して電源側に接続する構造になっているが、 図 7に示す構成では L S I 8 が合成樹脂フィルム上に有ることから、 チップオンフィルム （Chip on Film) モ ジュールということがある。  In the LC module, the transparent front substrate 1 and the back substrate 2 provided with the wires forming the transparent electrode are superimposed, and the liquid crystal is contained in the pixel area divided by the seal member between the two transparent substrates 1 and 2. The liquid crystal display unit (LCD) 3 enclosed and metal copper wires 5 and 6 connected to the wiring from the liquid crystal display unit 3 are formed on a circuit board 7 made of a synthetic resin film such as polyimide resin, Connect the LSI (IC) 8 that controls the conduction of the transparent pixel electrode of the liquid crystal display unit 3 in the area where the metal copper wires 5 and 6 are assembled via an ACF (Anisotropic Conductive Film) (not shown) The circuit board portion 9 is composed of Both the substrates 1 and 2 are made of transparent glass or transparent resin plate. The wiring of the LSI (IC) 8 on the circuit board portion 9 is connected to the power supply side via an anisotropic conductive film (not shown) or the like, but in the configuration shown in FIG. Since it is on a synthetic resin film, it may be called a chip on film module.
また、 図 7に示す L CMは、 導光板 1 1を L C D 3のバックライ トとして 用いる例であり、 L CD 3と回路基板部 9を一体化して導光板 1 1を重ね合 わせて配置し、 導光板 1 1の LED、 冷陰極管等からなる光源 1 2と共に基 板 1 3に取り付けており、 該基板 1 3の導光板 1 1側の側面には可視光を反 射させるための塗膜、 又はテープが被覆されている。 In addition, LCM shown in FIG. 7 is an example in which the light guide plate 11 is used as a backlight of the LCD 3, and the L CD 3 and the circuit board portion 9 are integrated to overlap the light guide plate 11. The light guide plate 1 1 is mounted on a substrate 13 together with a light source 12 such as an LED, a cold cathode tube, etc. Visible light is reflected on the side surface of the substrate 13 on the light guide plate 1 1 side. Coating or tape to cover the
また、 例えば携帯電話でメイン L C Dと背面 L C Dを取り付けている場合など、 —つの L CM製品に二つの LCD 3、 3 ' を取り付けた場合の側面図を図 8に示 す。 この場合には、 それぞれの LCD 3、 3 ' に導光板 1 1、 1 1 ' と光源 12、 12' を実装しているので、 かさ高い構成になっている。  In addition, Fig. 8 shows a side view of the case where two LCDs 3 and 3 'are attached to one LCM product, for example, when the main LCD and the back LCD are attached to a mobile phone. In this case, the light guide plates 1 1 1 1 1 1 ′ and the light sources 12 12 ′ are mounted on the respective LCDs 3 3 ′, so that the configuration is bulky.
また、 導光板 1 1と光源 1 2の組み合わせ （以下、 これをバックライ トュニッ トとレ、うことがある） に L CD 3を固定するには、 両面テープで両者を貼り付け 合わせるかもしくは図 9の液晶表示装置の要部側靳面図に示すようにバックライ トュニットの導光板 21に爪 21 a、 21 bを設け、 その爪 21 a、 21 bで L CD 3を固定するなどの方法を用いている。 ' 前記図 7、 図 8に示す従来技術の液晶表示装置では、 次のような欠点があった。 一つの LCD 3に一つのバックライ トュニットを実装するため、 一つの液晶表示 装置製品用に二つのバックライ トュニットを作ることになるので、 金型費、 材料 費がかさみ、 実装体積が大きくなる。  Also, to fix the L CD 3 to the combination of the light guide plate 1 1 and the light source 1 2 (hereinafter, this may be a backlight unit or a plate), both may be pasted together with a double-sided tape or FIG. As shown in the side view of the main part of the liquid crystal display device, the light guide plate 21 of the backlight unit is provided with the claws 21a and 21b, and the L CD 3 is fixed by the claws 21a and 21b. ing. The prior art liquid crystal display shown in FIGS. 7 and 8 has the following disadvantages. In order to mount one backlight unit on one LCD 3, two backlight units are made for one liquid crystal display product, which increases the cost of molding and materials, and the mounting volume increases.
また、 両面テープでバックライ トュ-ットと LCD 3を貼り合わせる場合にパ ックライ トユニットと L CD 3の間に異物が入ると、 これを取り除くために分解 しょうとすると製品に傷を付けたり、 両面テープの粘着材が残り、 製品表面を汚 染する。 このため、 ノ ックライ トユニットと L CD 3の間に一旦異物が入ると、 再組立ができないおそれがあった。  Also, when attaching the back light to the LCD 3 with double-sided tape, if foreign matter gets in between the pack light unit and the L CD 3, the product may be scratched if it is disassembled in order to remove it. The adhesive on the double-sided tape remains and contaminates the product surface. For this reason, once foreign matter entered between the knock write unit and the L CD 3, there was a risk that reassembly could not be performed.
また、 ノ ックライ トュニットの導光板 21に設けた二つの爪 21 a、 21 b間 に LCD 3を嵌め込む構成も知られているが、 その構成は図 9に示すように、 導 光板 21に設けた二つの爪 21 a、 2 1 b間に LCD 3を嵌め込むと、 二つの爪 21 a、 21 bと L CD 3の表面の間に若干の隙間 S 1、 S 2ができてしまい、 がたつき音がすることがあった。  There is also known a configuration in which the LCD 3 is fitted between the two claws 21a and 21b provided on the light guide plate 21 of the polarizing plate, but the configuration is provided on the light guide plate 21 as shown in FIG. When the LCD 3 is fitted between the two claws 21 a and 21 b, a slight gap S 1 or S 2 is formed between the surfaces of the two claws 21 a and 21 b and the L CD 3. There was a screeching noise.
本発明の課題は、 二つ以上の L CD又は L CMをバックライ トュニッ トに 取り付けた液晶表示装置であっても、 低コス トで、 小型化が可能で、 また再 組み立てが容易で、 がたつきのない製品を提供することである。 発明の開示 The object of the present invention is to reduce the cost and size of the liquid crystal display device having two or more L CDs or L CMs attached to the back light, and to reduce the size. It is to provide a product that is easy to assemble and has no rattling. Disclosure of the invention
本発明の上記課題は、 次の発明により解決される。  The above problems of the present invention are solved by the following invention.
すなわち、 画素電極が設けられた第 1の基板と対向画素電極が設けられた第 2 の基板を前記両方の電極が対向配置されるように重ね合わせ、 前記第 1の基板と 第 2の基板の間の画素領域に液晶を封入した液晶表示部 （LCD) を二つ設け、 二つの液晶表示部 （LCD) の間に挟み込んだ導光板と、 該導光板の端部に配置 した光源とを備えた液晶表示装置である。  That is, the first substrate provided with the pixel electrode and the second substrate provided with the opposite pixel electrode are superimposed so that the both electrodes are disposed opposite to each other, and the first substrate and the second substrate Provided with two liquid crystal display units (LCDs) in which liquid crystal is sealed in a pixel region between them, a light guide plate sandwiched between two liquid crystal display units (LCDs), and a light source arranged at an end of the light guide plate Liquid crystal display device.
前記導光板は各液晶表示部 （LCD) にそれぞれ対応した一対の導光性材料か らなり、 該一対の導光板の間に反射板を配置しても良い。 また、 前記導光板は各 液晶表示部 （LCD) を挟み込むための傾斜部付きの固定爪と可動爪を備えた構 成にすることができる。 本発明によれば、 ーセットの光源と導光板から成るバックライ トュニットから、 その表、 裏両面に設けた二つの LCD又は L CMに同時に光を照射することがで きる。 また、 光源を実装する面積、 工数も削減できる。  The light guide plate may be made of a pair of light guide materials respectively corresponding to the liquid crystal display units (LCDs), and a reflection plate may be disposed between the pair of light guide plates. Further, the light guide plate can be configured to have a fixed claw and a movable claw with an inclined portion for sandwiching each liquid crystal display unit (LCD). According to the present invention, two LCDs or LCDs provided on the front and back sides can be simultaneously irradiated with light from a backlight unit comprising a light source and a light guide plate. In addition, the area and man-hours for mounting the light source can be reduced.
前記導光板は各液晶表示部 （LCD) にそれぞれ対応した一対の導光性材料か らなり、 該一対の導光板の間に反射板を配置することでバックライ ト性能が効果 的に発揮できる。  The light guide plate is made of a pair of light guide materials respectively corresponding to the liquid crystal display units (LCD), and backlight performance can be effectively exhibited by arranging a reflection plate between the pair of light guide plates.
また、 このバックライトタイプの液晶表示装置には、 LCD又は LCMを固定 するために、 がたつき音の出ない傾斜部付きの爪を有するバックライ トュニット を用いるので、 バックライ トと LCD 3又は LCMの間に異物が入った場合でも、 容易に再組立ができる。 図面の簡単な説明  In addition, since this backlight type liquid crystal display device uses a backlight unit having a claw with a sloping portion that does not produce rattling noise in order to fix the LCD or LCM, the backlight and the LCD 3 or LCM Even if foreign matter gets in between, it can be easily reassembled. Brief description of the drawings
図 1は、 本発明の実施の形態の二つの L CDを表裏面に装着するための導光板 の組み立て前の構成を示す斜視図である。  FIG. 1 is a perspective view showing a configuration before assembly of a light guide plate for mounting two L CDs according to the embodiment of the present invention on the front and back surfaces.
図 2は、 図 1の導光板の組立後の斜視図 （図 2 (a) ) と図 2 (a) の A— A 線断面視図 （図 2 (b) ) である。 Fig. 2 is a perspective view of the light guide plate of Fig. 1 after assembly (Fig. 2 (a)) and A-A of Fig. 2 (a). It is a line cross-sectional view (FIG. 2 (b)).
図 3は、 図 1、 図 2に示すバックライトユニットの两面に LCDを配置する場 合の組み立て前の構成を示す斜視図である。  FIG. 3 is a perspective view showing a configuration before assembly in the case of disposing the LCD on the wedge surface of the backlight unit shown in FIG. 1 and FIG.
図 4は、 図 1の A— A線断面視図である。  FIG. 4 is a sectional view taken along line A-A of FIG.
図 5は、 図 2 (a) の B— B線断面視図である。  FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 2 (a).
図 6は、 本発明の実施の形態のバックライ トユニット部分の拡大断面図である。 図 7は、 従来技術の L CDをバックライ トュニットに取り付ける工程を示す斜 視図 （図 7 (a) ) と組立後の側断面図 （図 7 (b) ) である。  FIG. 6 is an enlarged cross-sectional view of a backlight unit portion according to the embodiment of the present invention. FIG. 7 is a perspective view (FIG. 7 (a)) and a side sectional view after assembly (FIG. 7 (b)) showing the process of attaching the prior art L CD to the backlight unit.
図 8は、 従来技術の液晶表示装置の側断面図である。  FIG. 8 is a side sectional view of a liquid crystal display of the prior art.
図 9は、 従来技術の液晶表示装置の要部側断面図である。 発明を実施するための最良の形態  FIG. 9 is a side sectional view of an essential part of a liquid crystal display device of the prior art. BEST MODE FOR CARRYING OUT THE INVENTION
本発明の実施の形態について図面と共に説明する。  Embodiments of the present invention will be described with reference to the drawings.
まず、 本実施の形態の二つの LCDを装着できるバックライトュニットの構成 を図 1、 図 2に示す。 図 1の斜視図は二つの L CDを表裏面に装着するための導 光板 1 5、 15' の組み立て前の構成を示す図である。 二つの導光板 15、 1 5 ' の間に反射板 1 6を挟み込み、 これらを重ね合わせて図 2 (a) の斜視図に示 すように二つの導光板 15、 1 5 ' を一体化する。 また図 2 (b) に図 2 (a) の A— A線断面を見た図を示すように、 導光板 1 5、 15 ' の一側面側にはプリ ント基板 1 7に支持された光源 1 2が配置されることになる （図 2 (a) にはプ リント基板 1 7は図示せず） 。 また、 図 2 (a) の B— B線断面部分の拡大図を 図 5に示す。 なお、 図 5には LCD 3、 3 ' (又は LCM) を装着した状態の側 断を見た図を示している。  First, the configuration of a backlight unit to which two LCDs of the present embodiment can be mounted is shown in FIGS. The perspective view of FIG. 1 is a view showing a configuration before assembling the light guide plates 15 and 15 'for mounting two L CDs on the front and back surfaces. The reflector 16 is sandwiched between the two light guide plates 15 and 15 ', and they are superimposed to integrate the two light guide plates 15 and 15' as shown in the perspective view of FIG. 2 (a). . Also, as shown in FIG. 2 (b) when the cross section along line A--A in FIG. 2 (a) is seen, a light source supported by the printed circuit board 17 on one side of the light guide plate 15 or 15 '. 12 will be placed (print board 17 not shown in Fig. 2 (a)). In addition, Fig. 5 shows an enlarged view of the cross section along line B- B in Fig. 2 (a). Fig. 5 shows a side view with the LCD 3 or 3 '(or LCM) attached.
図 3には図 1、 図 2に示すバックライ トュニットの両面にそれぞれ表基板 1と 裏基板 2および表基板 1 ' と裏基板 2' を重ね合わせ、 該両透明基板 1、 2およ び 1 ' 、 2' の間にそれぞれシール部材で区分された画素領域内に液晶を封入し た LCD 3、 3 ' (又は LCM) を配置する場合の組み立て前の構成を示す。 ま た図 3には LCD 3、 3 ' から接続した金属銅の配線を形成した回路基板 7、 7 ， および前記 LCD 3、 3 ' の透明画素電極の導通制御をする L S I 8、 8 ' も 示している。 図 3に示すように導光板 1 5、 1 5' の各入光面に、 均等に光が入 るように単一の光源 12を配置することで、 各導光板 15、 1 5' は各 LCD 3、 3 ' (又は LCM) に向けて互いに均等に光を照射することができる。 In FIG. 3, the front substrate 1 and the back substrate 2 and the front substrate 1 ′ and the back substrate 2 ′ are superimposed on both sides of the backlight unit shown in FIGS. 1 and 2, respectively, and the both transparent substrates 1, 2 and 1 ′ are shown. And 2 'show the configuration before assembly in the case of arranging the LCD 3, 3' (or LCM) in which the liquid crystal is enclosed in the pixel area divided by the seal member respectively. Further, FIG. 3 also shows circuit boards 7 and 7 on which metal copper wiring formed from LCDs 3 and 3 ′ is formed, and LSIs 8 and 8 ′ for controlling conduction of the transparent pixel electrodes of the LCDs 3 and 3 ′. It shows. As shown in FIG. 3, by arranging a single light source 12 so that light enters uniformly on each light entrance surface of the light guide plates 15 and 15 ', each light guide plate 15 and 15' can Light can be emitted evenly to each other towards the LCD 3, 3 ′ (or LCM).
なお光源 12としては、 フィラメントタイプの電球、 冷陰極管、 熱陰極管、 L EDなどが用いられ、 反射板 1 6としてはプラスチックシートに白色塗膜を設け たもの、 アルミニウムの金属膜を被覆したもの、 又はアルミ箔を貼り付けたもの が用いられる。 また導光板 15、 15 ' としてはアクリル樹脂、 ポリカーボネー ト樹脂などから成る材料が用いられる。  As the light source 12, a filament type bulb, a cold cathode tube, a hot cathode tube, an LED, etc. are used, and as the reflecting plate 16, a plastic sheet provided with a white coating film, an aluminum metal film coated Ones or ones attached with aluminum foil are used. The light guide plates 15 and 15 'are made of a material such as acrylic resin or polycarbonate resin.
また、 図 4には図 1の A— A線断面視図を示すが、 導光板 15には LCD 3 (又は LCM) 固定用の爪 15 a、 1 5 bを対向する側面に設けている。 この爪 1 5 a, 1 5 bは固定爪 （可動しない爪） 15 aと可動爪 15 bの 2種類があり、 それぞれに LCD 3 (又は LCM) とバックライ トユニッ トの嵌合性を良くして、 バックライ トユニットに LCD 3 (又は LCM) を固定した後に、 がたつき音が しないように若干の傾斜部 （図 4の矢印 C部） が付いている。  Further, FIG. 4 shows a cross-sectional view taken along the line A-A of FIG. 1, but the light guide plate 15 is provided with the claws 15a and 15b for fixing the LCD 3 (or LCM) on opposite side surfaces. There are two types of claws 15a and 15b: fixed claws (not movable) 15a and movable claws 15b. The fit between the LCD 3 (or LCM) and the backlight unit is improved. After fixing the LCD 3 (or LCM) to the backlight unit, there is a slight slope (arrow C in Figure 4) to prevent rattling noise.
この爪 1 5 a、 1 5 bの傾斜部に LCD 3 (又は L CM) の角が当たるように、 固定爪 1 5 aと可動爪 15 b間の長さ L (図 4に示す長さ L) は、 LCD 3 (又 は LCM) の対応する側面の幅 Bより若干小さく設計する。 両方の爪 15 a、 1 5 bは導光板 1 5と同じ材質の合成樹脂で作られているため、 若干のバネ性を持 つている。 そのため、 両方の爪 1 5 a、 1 5 bに挟まれた LCD 3 (又は LC M) は常に矢印 D方向に押し付けられ、 LCD 3 (又は LCM) はがたつきがな く、 爪 15 a、 1 5 b間に保持される。 図 5には爪 1 5 bの変形時と元通りにな つた後の形状をそれぞれ点線と実線で示している。  The length L between the fixed claw 15 a and the movable claw 15 b (the length L shown in FIG. 4 so that the corners of the LCD 3 (or L CM) hit the inclined portions of the claws 15 a and 15 b. ) Should be designed slightly smaller than the width B of the corresponding side of LCD 3 (or LCM). Both of the claws 15a and 15b are made of the same material as the light guide plate 15 and therefore have some elasticity. Therefore, the LCD 3 (or LCM) sandwiched between both the claws 15a and 15b is always pressed in the direction of the arrow D, and the LCD 3 (or LCM) is not loose, and the claws 15a, Hold between 15 b. Fig. 5 shows the shapes of the claw 15b when deformed and after being restored as dotted and solid lines, respectively.
本実施の形態の構成では、 図 9に示す従来技術のバックライ トユニットに設け た爪 21 a、 2 l b間に LCD 3 (又は LCM) を嵌め込む場合に生じる爪 21 a、 21 bと LCD 3 (又は LCM) との間の隙間 S I、 S 2がないので、 がた つき音が発生することはない。  In the configuration of this embodiment, the claws 21a and 21b and the LCD 3 which are produced when the LCD 3 (or LCM) is fitted between the claws 21a and 2 lb provided in the prior art backlight unit shown in FIG. There is no gap SI, S 2 between (or LCM), so no rattling noise is generated.
上記本発明の導光板 15、 1 5' の入光面と光源 1 2の位置を調整することに より （もしくは、 入光面の面積を変えることにより） バックライ トュニットの表 面、 裏面の発光輝度を調整することもできる。 また、 さらに複数個の光源がある 場合は点灯させる光源の数を調整することにより発光輝度を調整することもでき る。 The light emission luminances of the front and back surfaces of the back light unit by adjusting the position of the light incident surface of the light guide plate 15 or 15 'of the present invention and the light source 12 (or changing the area of the light incident surface) You can also adjust the There are also more light sources In this case, it is also possible to adjust the emission brightness by adjusting the number of light sources to be lit.
また、 図 5に示す反射板 1 6を用いないで、 図 6に示す導光板 1 9により、 そ の両面に設けた固定爪 19 aと可動爪 19 b間に二つの L CD 3 (又は L CM) を嵌め込む構成でも良い。  Also, without using the reflecting plate 16 shown in FIG. 5, two L CD 3 (or L) are provided between the fixed claw 19a and the movable claw 19b provided on both sides of the light guiding plate 19 shown in FIG. CM) may be inserted.
ML CD (マルチ LCD) モジュールに本実施の形態のバックライ トユニット を組み合わせることにより低コスト、 省スペースの LCDモジュールュ-ットを 提供することができる。  By combining the backlight unit of the present embodiment with an ML CD (multi LCD) module, it is possible to provide a low cost, space-saving LCD module system.
この方法を用いることにより、 折り畳み式携帯電話に実装されているサブ LC D (背面 LCD) とメイン LCDを同時にバックライ ト方式で表示させること力； できる。  By using this method, it is possible to simultaneously display the sub LCD (rear LCD) and the main LCD, which are mounted on a foldable mobile phone, in a backlit mode.
上記実施の形態によれば、 1セッ トの光源 12と導光板 15、 1 5' 又は 1 9 から成るバックライトユニットの表、 裏の両面に設けた LCD 3、 3， （又は L CM) を同時に表示させることができ、 また、 光源 1 2を実装する面積、 工数も 削減できるので、 低消費電力、 低コストかつ省スペースなバックライ トタイプの 液晶表示装置を提供できる。  According to the above embodiment, the LCDs 3, 3 (or L CM) provided on the front and back sides of the backlight unit consisting of one set of light sources 12 and light guide plates 15, 15 'or 19 are used. Since the display can be performed simultaneously and the area and man-hours for mounting the light source 12 can be reduced, it is possible to provide a low power consumption, low cost, and space saving back light type liquid crystal display device.
また、 このバックライ トタイプの液晶表示装置には、 LCD3 (又は LCM) を固定するために、 がたつき音の出ない爪 1 5 a、 1 5 bの組み、 爪 15 a ' 、 15 b ' の組み、 又は 19 a、 1 9 bの組みを有するバックライ トュ-ットを用 いるので、 ノ ックライ トと L CD 3、 3 ' (又は LCM) の間に異物が入った場 合でも、 容易に再組立ができる。  In addition, in this backlight type liquid crystal display device, in order to fix the LCD 3 (or LCM), a set of claws 15 a and 15 b which do not make rattling noise, and claws 15 a ′ and 15 b ′ The use of a back light with a combination or a combination of 19a and 19b makes it easy to get a foreign object in between the notebook and the L CD 3, 3 '(or LCM). It can be reassembled.
本実施の形態の液晶表示装置は携帯用電話機などの携帯用表示機器に適してい る。 産業上の利用可能性  The liquid crystal display device of the present embodiment is suitable for a portable display device such as a portable telephone. Industrial applicability
本発明によれば、 1セットの光源と導光板から成るバックライトュ-ットでニ つの LCD (又は LCM) を表示させることができ、 液晶表示装置の実装面積、 実装工数を低減でき、 低消費電力、 製造コストを下げることができる。  According to the present invention, two LCDs (or LCMs) can be displayed with a backlight consisting of one set of light source and light guide plate, the mounting area of the liquid crystal display device can be reduced, and the number of mounting steps can be reduced. , Can reduce the manufacturing cost.
また、 このバックライトタイプの液晶表示装置では、 LCD (又は LCM) を 固定するための、 がたつき音の出ない爪を有するバックライ トュニットと L CD (又は LCM) の間に異物が入った場合でも、 容易に再組立ができる。 In addition, in this backlight type liquid crystal display device, the LCD (or LCM) It can be easily reassembled even if foreign matter gets in between the backlight unit and L CD (or LCM) that have claws that do not make rattle for fixing.

Claims

請求の範囲 The scope of the claims
1. 画素電極が設けられた第 1の基板と対向画素電極が設けられた第 2の基板を 前記両方の電極が対向配置されるように重ね合わせ、 前記第 1の基板と第 2の基 板の間の画素領域に液晶を封入した一対の液晶表示部 （LCD) と、 1. The first substrate provided with the pixel electrode and the second substrate provided with the opposite pixel electrode are superimposed so that the both electrodes are disposed opposite to each other, and between the first substrate and the second substrate A pair of liquid crystal displays (LCDs) in which liquid crystal is sealed in the pixel area of
該一対の液晶表示部 （LCD) の間に挟み込んだ導光板と、  A light guide plate sandwiched between the pair of liquid crystal display units (LCD);
該導光板の端部に配置した光源と  A light source disposed at the end of the light guide plate
を備えたことを特徴とする液晶表示装置。 The liquid crystal display device characterized by having.
2. 導光板は各液晶表示部 （LCD) にそれぞれ対応した一対の導光性材料から なり、 2. The light guide plate consists of a pair of light guide materials that correspond to each liquid crystal display (LCD),
該一対の導光板の間に反射板を配置したことを特徴とする請求項 1記載の液晶 表示装置。  The liquid crystal display device according to claim 1, wherein a reflection plate is disposed between the pair of light guide plates.
3. 導光板は各液晶表示部 （LCD) を挟み込むための傾斜部付きの固定爪と可 動爪とを備えたことを特徴とする請求項 1記載の液晶表示装置。 3. The liquid crystal display device according to claim 1, wherein the light guide plate is provided with a fixed claw and a movable claw with an inclined portion for sandwiching each liquid crystal display unit (LCD).
PCT/JP2002/012810 2001-12-14 2002-12-05 Liquid crystal display device WO2003052504A1 (en)

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KR101164822B1 (en) * 2005-12-01 2012-07-12 삼성전자주식회사 Information processing apparatus and manufacturing method for the same
JP2007178463A (en) * 2005-12-26 2007-07-12 Matsushita Electric Works Ltd Planar light emitter, and liquid crystal display apparatus equipped with the same
JP2009020338A (en) * 2007-07-12 2009-01-29 Yazaki Corp Lcd holding device and meter for vehicle
CN104155791B (en) * 2014-07-11 2017-01-18 京东方科技集团股份有限公司 Double-sided display panel and double-sided display device
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