JP2001021883A - Reflective liquid crystal display device and electronic equipment - Google Patents

Reflective liquid crystal display device and electronic equipment

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Publication number
JP2001021883A
JP2001021883A JP11191356A JP19135699A JP2001021883A JP 2001021883 A JP2001021883 A JP 2001021883A JP 11191356 A JP11191356 A JP 11191356A JP 19135699 A JP19135699 A JP 19135699A JP 2001021883 A JP2001021883 A JP 2001021883A
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Japan
Prior art keywords
liquid crystal
light
crystal display
display device
substrate
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Pending
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JP11191356A
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Japanese (ja)
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Eiichi Fukiharu
栄一 吹春
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Nec Corp
日本電気株式会社
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Priority to JP11191356A priority Critical patent/JP2001021883A/en
Publication of JP2001021883A publication Critical patent/JP2001021883A/en
Application status is Pending legal-status Critical

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    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F2001/133616Front illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00Function characteristic
    • G02F2203/02Function characteristic reflective

Abstract

PROBLEM TO BE SOLVED: To provide a reflective liquid crystal display device and an electronic equipment by which thin shapes and light weight are realized.
SOLUTION: The reflective liquid crystal display device is provided with a polarizing plate 3, a phase difference plate 4, a diffusion plate 5, a color filter 6, a transparent electrode 7, a liquid crystal layer 8 and a reflection electrode 9 between the two glass substrates 1, 2 placed opposite to each other. The glass substrate 1 closer to an observer is provided with projecting and recessing parts to function as a light transmission plate for a frontlight on the observer's side surface. The frontlight comprises the glass substrate 1 and a light source 10 arranged on a side face of the glass substrate 1.
COPYRIGHT: (C)2001,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、反射型液晶表示器及び反射型液晶表示器を備えた電子機器に関するものである。 BACKGROUND OF THE INVENTION The present invention relates to an electronic apparatus provided with a reflection type liquid crystal display and a reflective liquid crystal display device.

【0002】 [0002]

【従来の技術】従来の液晶表示器は、透過型液晶表示器と、反射型液晶表示器とに大別することが可能である。 Conventional liquid crystal display device includes a transmissive liquid crystal display device, it is possible to roughly classified into a reflection type liquid crystal display device.
透過型液晶表示器では、液晶セルの背面にバックライトが配置される。 The transmission type liquid crystal display device, a backlight is disposed on the back surface of the liquid crystal cell. 一方、反射型液晶表示器は、周囲光を利用して表示を行うため、バックライトを必要とせず、消費電力が少ないという利点がある。 On the other hand, the reflection type liquid crystal display device, in order to perform display by utilizing ambient light, does not require a backlight, there is an advantage that power consumption is small. このため、携帯電話機等の電子機器に液晶表示器の採用を検討する場合、消費電力が小さい反射型液晶表示器が有力である。 Therefore, when considering adoption of a liquid crystal display device in an electronic device such as a mobile phone, it is a potent small power consumption reflection-type liquid crystal display device.

【0003】ただし、反射型液晶表示器は、周囲光を利用するので、表示輝度が周辺環境へ依存する度合いが非常に高く、特に夜間などの暗闇では、表示が全く認識できないこともある。 [0003] However, the reflective type liquid crystal display equipment can utilize ambient light, very high degree of display brightness depends on the surrounding environment, especially in the dark, at night, sometimes display can not recognize at all. 特に、カラー化のためにカラーフィルタを用いた反射型液晶表示器では、上述の問題は大きく、十分な周囲光が得られない場合に備えて携帯電話機等の電子機器では、反射型液晶表示器の前面にフロントライトを設けることが必要である。 In particular, in the reflection type liquid crystal display device using a color filter for colorization, the above problem is big, in the electronic device such as a mobile phone in case of sufficient ambient light can not be obtained, the reflective type liquid crystal display device it is necessary to provide a front light on the front.

【0004】図6は従来の反射型液晶表示器の断面図である。 [0004] FIG. 6 is a sectional view of a conventional reflection type liquid crystal display device. 図6の反射型液晶表示器は、ガラス基板21と、 Reflection type liquid crystal display of FIG. 6 includes a glass substrate 21,
ガラス基板22と、フロントライトからの光源光のうち特定の偏光成分を透過させる偏光板23と、光学補償を行うための位相差板24と、光源光を拡散させる拡散板25と、3原色のカラーフィルタ26と、光透過性の透明電極27と、液晶層28と、液晶層28を透過した光を反射させる反射電極29とを有している。 A glass substrate 22, a polarizer 23 for transmitting a specific polarized light component of the light source light from the front light, a phase difference plate 24 for performing optical compensation, a diffusion plate 25 for diffusing light from the light source, the three primary colors a color filter 26, a light-transmissive transparent electrode 27, and the liquid crystal layer 28, and a reflective electrode 29 for reflecting the light transmitted through the liquid crystal layer 28. さらに、この反射型液晶表示器は、フロントライトを構成する、光源30、反射板31及び導光板32を有している。 Furthermore, the reflection type liquid crystal display constitutes a front light, a light source 30, and a reflecting plate 31 and the light guide plate 32.

【0005】光源30から出射した光源光は、導光板3 [0005] source light emitted from the light source 30, the light guide plate 3
2に直接入射するか、あるいは反射板31で反射して導光板32に入射する。 2 or directly incident or input to the light guide plate 32 is reflected by the reflection plate 31. 導光板32は、側面から入射した光源光の一部を反射させて偏光板23に入射させる。 The light guide plate 32, is incident on the polarizing plate 23 by reflecting a portion of the source light incident from the side. このように従来の反射型液晶表示器では、液晶表示器の前面にフロントライトの導光板32を配置する構造であった。 In this manner, the conventional reflection type liquid crystal display device, and a structure for arranging the light guide plate 32 of the front light on the front of the liquid crystal display device. このため、反射型液晶表示器が厚くなり、重くなるという問題点があった。 Thus, the reflection type liquid crystal display device becomes thick, there is a problem that heavy. 図7は、図6の反射型液晶表示器を備えた携帯電話機の断面図である。 Figure 7 is a cross-sectional view of a mobile phone provided with a reflection type liquid crystal display device of FIG. 従来の携帯電話機では、図6の反射型液晶表示器の前面にフロントカバー34を配置しているので、携帯電話機が厚くなり、重くなるという問題点があった。 In a conventional mobile phone, since the place the front cover 34 in front of the reflection type liquid crystal display of FIG. 6, the mobile phone becomes thick, there is a problem that heavy.

【0006】 [0006]

【発明が解決しようとする課題】以上のように従来の反射型液晶表示器では、液晶表示器の前面にフロントライトの導光板を配置しているので、反射型液晶表示器が厚くなり、重くなるという問題点があった。 In conventional as described above [0008] reflection type liquid crystal display device, since the arranged light guide plate of the front light on the front surface of the liquid crystal display device, becomes thick reflective liquid crystal display device, heavy there is a problem that becomes. また、反射型液晶表示器を備えた携帯電話機等の電子機器では、反射型液晶表示器の前面にフロントカバーを配置しているので、電子機器が厚くなり、重くなるという問題点があった。 Further, in an electronic device such as a mobile phone having a reflection type liquid crystal display device, since the front cover is disposed in front of the reflection type liquid crystal display device, the electronic device becomes thick, there is a problem that heavy. 本発明は、上記課題を解決するためになされたもので、薄型軽量化を実現することができる反射型液晶表示器及び電子機器を提供することを目的とする。 The present invention has been made to solve the above problems, and an object thereof is to provide a reflection type liquid crystal display device and an electronic apparatus can be realized thinner and lighter.

【0007】 [0007]

【課題を解決するための手段】本発明の反射型液晶表示器において、2枚の対向する基板(1,2)のうち観察者に近い方の第1の基板(1)は、フロントライトの導光板として機能するための凹凸部を観察者側の表面に有し、フロントライトは、上記第1の基板と、第1の基板の側面に配置された光源(10)とから構成されるものである。 In the reflection type liquid crystal display device of the present invention According to an aspect of the first substrate that is closer to the observer of the two opposing substrates (1, 2) (1), the front light It has an uneven portion for functioning as a light guide plate on the observer side surface, front light, those constituted from the first substrate, and a light source disposed on a side surface of the first substrate (10) it is. また、上述の反射型液晶表示器の1構成例は、 Further, 1 configuration of the reflection type liquid crystal display device described above,
2枚の対向する基板間に、フロントライトからの光源光のうち特定の偏光成分を透過させる偏光板(3)と、光学補償を行うための位相差板(4)と、光源光を拡散させる拡散板(5)と、3原色のカラーフィルタ(6) Between two opposing substrates, a polarizing plate (3) that transmits a specific polarized light component of the light source light from the front light, a phase difference plate for performing optical compensation and (4), to diffuse the light source light and the diffuser (5), three primary color filters (6)
と、光透過性の透明電極(7)と、液晶層(8)と、液晶層を透過した光を反射させる反射電極(9)とを有するものである。 When a light-transmissive transparent electrode (7) and has a liquid crystal layer (8), and a reflective electrode that reflects light transmitted through the liquid crystal layer (9). また、本発明の電子機器において、反射型液晶表示器の2枚の対向する基板のうち観察者に近い方の第1の基板は、フロントライトの導光板として機能するための凹凸部を観察者側の表面に有し、フロントライトは、上記第1の基板と、第1の基板の側面に配置された光源とからなり、この反射型液晶表示器を上記第1 In the electronic apparatus of the present invention, the first substrate that is closer to the observer of the substrate to the two opposing reflective liquid crystal display device includes an uneven portion for functioning as a light guide plate of the front light observer has a surface side, front light, and said first substrate consists of a first light source disposed on a side surface of the substrate, the first of the reflection type liquid crystal display device
の基板が外部に露出するように筐体に取り付けるものである。 Substrates are those attached to the housing so as to be exposed to the outside.

【0008】 [0008]

【発明の実施の形態】[実施の形態の1]次に、本発明の実施の形態について図面を参照して詳細に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS [1 Embodiment will be described in detail with reference to the drawings, embodiments of the present invention.
図1は、本発明の第1の実施の形態となる反射型液晶表示器の断面図である。 Figure 1 is a cross-sectional view of a reflection type liquid crystal display device comprising a first embodiment of the present invention. 本実施の形態の反射型液晶表示器は、ガラス基板1とガラス基板2の間に、観察者の側(図1上側)から順に、フロントライトからの光源光のうち特定の偏光成分を透過させる偏光板3と、光学補償を行うための位相差板4と、光源光を拡散させる拡散板5と、3原色のカラーフィルタ6と、光透過性の透明電極7と、液晶層8と、液晶層8を透過した光を反射させる反射電極9とを有している。 Reflection type liquid crystal display device of this embodiment, between the glass substrates 1 and 2, in order from the observer side (Figure 1 top), and transmits a specific polarized light component of the source light from the front light a polarizer 3, a retardation plate 4 for performing optical compensation, a diffusion plate 5 that diffuses light from the light source, the color filter 6 of the three primary colors, the light transmission of the transparent electrode 7, and the liquid crystal layer 8, a liquid crystal and a reflective electrode 9 for reflecting the light transmitted through the layer 8.

【0009】さらに、この反射型液晶表示器は、ガラス基板1の側面に沿って配置された光源10と、光源10 Furthermore, the reflection type liquid crystal display device includes a light source 10 arranged along the side of the glass substrate 1, a light source 10
からの光をガラス基板1の側面のみへ集光させる反射板11とを有している。 And a reflection plate 11 which condenses only to the side surface of the glass substrate 1 a light from. 光源10としては冷陰極管が一般的であるが、携帯電話機等の小型軽量が重視される電子機器に反射型液晶表示器を搭載する場合には、インバータ回路が不要な発光ダイオードが適している。 As the light source 10 is generally a cold cathode tube, when mounting the reflection type liquid crystal display device in an electronic device small and lightweight portable telephone or the like is emphasized, the inverter circuit is suitable unnecessary light emitting diode .

【0010】反射板11は、光源10とガラス基板1の側面を完全に覆うように設けられている。 [0010] reflecting plate 11 is provided to the side surface of the light source 10 and the glass substrate 1 so as to completely cover. この反射板1 The reflecting plate 1
1の断面形状は、2次曲線となっており、この2次曲線の焦点に光源10が配置される。 1 cross-sectional shape, has a quadratic curve, the light source 10 is arranged at the focal point of the quadratic curve.

【0011】次に、図1の反射型液晶表示器の製造方法について説明する。 [0011] Next, a method for manufacturing a reflection type liquid crystal display device of FIG. 図2は、図1の反射型液晶表示器のA部を拡大した断面図である。 Figure 2 is an enlarged sectional view of the A portion of the reflection type liquid crystal display device of FIG. なお、図2では、偏光板3、位相差板4、拡散板5、カラーフィルタ6、透明電極7、液晶層8及び反射電極9の記載を簡略化している。 In FIG. 2, the polarizing plate 3, the phase difference plate 4, a diffusion plate 5, the color filter 6, a transparent electrode 7, a simplified description of the liquid crystal layer 8 and the reflective electrode 9.

【0012】まず、光透過性を有する透明なガラス基板1上に、光透過性の樹脂からなる偏光板3、位相差板4 [0012] First, on a transparent glass substrate 1 having optical transparency, a polarizing plate 3 made of a light transparent resin, the phase difference plate 4
及び拡散板5を順次積層し、さらに拡散板5の上にR And sequentially laminating a diffusing plate 5, further R on the diffusion plate 5
(赤)、G(緑)、B(青)の三原色を有する染料や顔料の入った着色樹脂からなるカラーフィルタ6、ITO (Red), G (green), a color filter 6 made of a colored resin containing the dye or pigment having three primary colors of B (blue), ITO
(Indium Tin Oxide)等からなる透明電極7を順次積層する。 Sequentially laminated (Indium Tin Oxide) consisting like transparent electrode 7.

【0013】これらの積層構造を形成する前に、積層構造を形成する面と反対側のガラス基板1の面には、凹凸部12が予め形成されている。 [0013] Prior to forming these multilayer structures, the surface of the glass substrate 1 opposite to the surface to form a laminate structure, uneven portion 12 is previously formed. この凹凸部12は、一定間隔ごとに設けられた、深さが1〜100μmの溝12 The concavo-convex portion 12, provided at regular intervals, the depth of 1~100μm groove 12
aと、溝12aの壁面である傾斜部12bとから構成される。 And a, composed of the inclined portion 12b is a wall surface of the groove 12a. 凹凸部12のうち傾斜部12bを除く部分(溝1 Portion excluding the inclined portion 12b of the concave-convex portion 12 (groove 1
2aの底面を含む)は、平坦部12cとなっている。 Including the bottom of 2a) is a flat section 12c. このような凹凸部12は、例えばエッチング等の方法により形成することができる。 Such concavo-convex portion 12 may be formed, for example, by a method such as etching.

【0014】一方、光透過性を有する透明なガラス基板2上には、Al等からなる反射電極9を形成する。 [0014] On the other hand, on a transparent glass substrate 2 having an optical transparency, to form a reflective electrode 9 made of Al or the like. 次に、ガラス基板1とガラス基板2とを、透明電極7と反射電極9とが対向するように配置した上で接着剤により貼り合わせる。 Then, the glass substrate 1 and the glass substrate 2, a transparent electrode 7 and the reflective electrode 9 bonded with adhesive on which are arranged so as to face each other. このとき、透明電極7と反射電極9との間には、スペーサにより所定の高さの空隙が形成されている。 At this time, between the transparent electrode 7 and the reflective electrode 9, the air gap of a predetermined height is formed by the spacer. この空隙に液晶を注入することにより、液晶層8 By injecting a liquid crystal into the gap, the liquid crystal layer 8
を形成する。 To form. 最後に、ガラス基板1の側面に、光源10 Finally, the side surface of the glass substrate 1, a light source 10
と、光源10を覆うように反射板11とを取り付ける。 When attached to a reflector 11 so as to cover the light source 10.
こうして、反射型液晶表示器の作製が完了する。 Thus, the production of reflection type liquid crystal display device is completed.

【0015】次に、以上のような反射型液晶表示器の動作について説明する。 [0015] Next, the operation of the reflection type liquid crystal display device as described above. 光源10から全方向に出射した光源光のうち、その一部は直接ガラス基板1の側面に入射し、残りは反射板11に入射する。 Among the light source 10 of the light source light emitted in all directions, some of directly incident on the side surface of the glass substrate 1, the rest is incident on the reflection plate 11. 反射板11はその断面形状が2次曲線であるため、反射板11に入射した光源光は、2次曲線の中心線と平行な方向へ反射され、ガラス基板1の側面に入射する。 Since the reflecting plate 11 is its sectional shape is quadratic, the source light incident on the reflector 11 is reflected to the center line parallel to the direction of the quadratic curve, is incident on the side surface of the glass substrate 1.

【0016】そして、ガラス基板1に入射した光源光のうち、その一部はガラス基板1とその周辺媒質との界面に入射する。 [0016] Then, out of the source light incident on the glass substrate 1, a portion is incident on the interface between the glass substrate 1 and around the medium. この界面には、傾斜部12b及び平坦部1 The interface, the inclined portion 12b and the flat portion 1
2cからなる上側の界面と、下側の界面12dとがある。 An upper surface consisting 2c, there is a lower surface 12d. 反射面である傾斜部12bに入射した光源光は、図2に示すように傾斜部12bで反射し、垂直に近い角度でガラス基板1を出射して偏光板3に入射する。 Source light incident on the inclined portion 12b is a reflective surface is reflected by the inclined portion 12b as shown in FIG. 2, the glass substrate 1 is emitted is incident on the polarizing plate 3 at an angle close to verticality.

【0017】一方、上側の平坦部12cあるいは下側の界面12dに入射した光源光のうち、ガラス基板1とその周辺媒質の屈折率で決定される入射角以上の角度で入射した光は、全反射する。 Meanwhile, among the source light incident on the upper side of the flat portion 12c or the lower side of the interface 12d, light incident at an angle greater than the incident angle determined by the refractive index of the glass substrate 1 with surrounding medium, total reflect. したがって、上側の平坦部1 Thus, the upper flat part 1
2cあるいは下側の界面12dに入射した光は、傾斜部12bに入射するまで、平坦部12cと界面12dとの間で全反射を繰り返しつつ伝搬する。 Light incident on the interface 12d of 2c or lower, before entering the inclined portion 12b, propagates while repeating total reflection between the flat portion 12c and the interface 12d.

【0018】次に、偏光板3は、ガラス基板1から入射した光源光のうち特定の偏光成分のみを透過させる。 Next, the polarizing plate 3 transmits only a specific polarized light component of the source light incident from the glass substrate 1. 位相差板4は、コントラスト比を向上させるために、液晶層8の液晶分子の並び方に応じた、入射光の光学補償を行う。 Retardation plate 4, in order to improve the contrast ratio, depending on the arrangement of the liquid crystal molecules of the liquid crystal layer 8, for optical compensation of the incident light. 拡散板5は、位相差板4を通過した光源光が液晶層8に均一に入射するように光源光を拡散させる。 Diffuser plate 5, a light source light passing through the phase difference plate 4 to diffuse the light source light to uniformly incident on the liquid crystal layer 8.

【0019】透明電極7と反射電極9には、表示すべき情報に応じた電圧が印加される。 [0019] The transparent electrode 7 and the reflective electrode 9, a voltage corresponding to information to be displayed is applied. これにより、液晶層8 As a result, the liquid crystal layer 8
の光透過性の大きさが制御され、透明電極7を透過して液晶層8に入射した光源光に対して、光変調が行われる。 Of the light transmissive size control, with respect to the source light incident on the liquid crystal layer 8 passes through the transparent electrode 7, the light modulation is performed. 液晶層8を透過した光は反射電極9に入射する。 Light transmitted through the liquid crystal layer 8 is incident on the reflective electrode 9. 反射電極9で反射した光は、入射光と逆の経路をたどってガラス基板1に達する。 Light reflected by the reflective electrode 9 reaches the glass substrate 1 by following the reverse path and the incident light. ガラス基板1に達した光は、その一部がガラス基板1を透過し、観察者の目に達する。 Light reaching the glass substrate 1 is partially transmitted through the glass substrate 1, reaches the eyes of the observer.
こうして、観察者は、表示情報を認識する。 In this way, the viewer recognizes the display information.

【0020】以上のように、本発明では、2枚の対向するガラス基板1,2のうち観察者に近い方のガラス基板1がフロントライトの導光板としての機能を有するため、従来と比べて導光板1枚分だけ薄型軽量化を実現することができる。 [0020] As described above, in the present invention, the glass substrate 1 closer to the viewer of the glass substrates 1 of two opposing functions as a light guide plate of the front light, as compared with the conventional the light guide plate by one sheet can be realized thinner and lighter.

【0021】[実施の形態の2]図3は、本発明の他の実施の形態となる反射型液晶表示器の断面図である。 [0021] [2 Embodiment FIG. 3 is a sectional view of a reflection type liquid crystal display device of still another embodiment of the present invention. 実施の形態の1では、ガラス基板1,2を用いたが、ガラス基板1,2の代わりに、光透過性を有する透明な樹脂基板1a,2aを用いてもよい。 In one embodiment, the use of glass substrates 1 and 2, instead of the glass substrate 1, a transparent resin substrate 1a having optical transparency, may be used 2a. また、図3に示すように、位相差板4と拡散板5の順番を入れ替えてもよい。 Further, as shown in FIG. 3, it may change the order of the retardation plate 4 and the diffusion plate 5.
また、実施の形態の1では、ガラス基板1に形成する凹凸部12の形状を傾斜部12bと平坦部12cを有する形状としているが、ガラス基板1あるいは樹脂基板1a Further, in the first embodiment, although the shape having the shape of the concave-convex portion 12 to be formed on the glass substrate 1 inclined portion 12b and the flat portion 12c, the glass substrate 1 or a resin substrate 1a
に形成する凹凸部の形状を鋸波状としてもよい。 The shape of the concave-convex portion to be formed in may be sawtooth.

【0022】[実施の形態の3]図4は、本発明の反射型液晶表示器を備えた携帯電話機の外観図であり、図5 [0022] Figure 4 [3 Embodiment is an external view of a mobile phone provided with a reflection type liquid crystal display device of the present invention, FIG. 5
は、図4の携帯電話機をC−C'線で切断してB部を拡大した断面図である。 Is an enlarged cross-sectional view of a B portion of the cellular phone in FIG. 4 by cutting line C-C '. 図4において、13は携帯電話機の筐体、14はアンテナ、15はレシーバ、16はキーパッドである。 4, 13 is a housing of the mobile phone, 14 antenna, 15 receiver, 16 is a key pad.

【0023】図5に示すように、本実施の形態では、フロントカバーを別途設けることなく、実施の形態の1あるいは実施の形態の2の反射型液晶表示器を携帯電話機の筐体13に取り付けることにより、フロントカバーを省略でき、薄型軽量化を実現することができる。 As shown in FIG. 5, in the present embodiment, without providing the front cover separately attaching a second reflective liquid crystal display of 1 or embodiment of the embodiment in the cellular phone of the housing 13 it makes the front cover can be omitted, it is possible to realize a thinner and lighter. なお、 It should be noted that,
本実施の形態では、電子機器の1例として携帯電話機を例にとって説明したが、携帯電話機に限らないことは言うまでもない。 In this embodiment, the mobile telephone was described as an example of an example of an electronic apparatus, it is needless to say that not limited to the mobile phone.

【0024】 [0024]

【発明の効果】本発明によれば、2枚の対向する基板のうち観察者に近い方の第1の基板がフロントライトの導光板としての機能を有するため、導光板1枚を省略するのと同等の効果を有し、従来と比べて薄型軽量化を実現することができる。 According to the present invention, since the first substrate that is closer to the viewer out of two opposing substrates has a function as a light guide plate of the front light, to omit one light guide plate and has the same effect, it is possible to realize a thinner and lighter than conventional.

【0025】また、反射型液晶表示器を第1の基板が外部に露出するように筐体に取り付けることにより、第1 Further, by attaching the reflective liquid crystal display device in a housing such that the first substrate is exposed to the outside, first
の基板がフロントカバーとして機能するため、フロントカバーを省略でき、電子機器の薄型軽量化を実現することができる。 Since the substrate functions as the front cover, the front cover can be omitted, it is possible to realize a thinner and lighter electronic devices.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】 本発明の第1の実施の形態となる反射型液晶表示器の断面図である。 1 is a cross-sectional view of a reflection type liquid crystal display device comprising a first embodiment of the present invention.

【図2】 図1の反射型液晶表示器の一部を拡大した断面図である。 2 is an enlarged sectional view of a portion of the reflective liquid crystal display device of FIG.

【図3】 本発明の他の実施の形態となる反射型液晶表示器の断面図である。 3 is a cross-sectional view of a reflection type liquid crystal display device of still another embodiment of the present invention.

【図4】 本発明の反射型液晶表示器を備えた携帯電話機の外観図である。 It is an external view of a mobile phone provided with a reflection type liquid crystal display device of the present invention; FIG.

【図5】 図4の携帯電話機の要部断面図である。 Figure 5 is a fragmentary cross-sectional view of the mobile phone in FIG.

【図6】 従来の反射型液晶表示器の断面図である。 6 is a cross-sectional view of a conventional reflection type liquid crystal display device.

【図7】 図6の反射型液晶表示器を備えた携帯電話機の断面図である。 7 is a cross-sectional view of a mobile phone provided with a reflection type liquid crystal display device of FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

1、2…ガラス基板、3…偏光板、4…位相差板、5… 1,2 ... glass substrate, 3 ... polarizing plate, 4 ... retardation plate, 5 ...
拡散板、6…カラーフィルタ、7…透明電極、8…液晶層、9…反射電極、10…光源、11…反射板、12… Diffuser plate, 6 ... color filter, 7 ... transparent electrode, 8 ... liquid crystal layer, 9 ... reflecting electrode 10 ... light source, 11 ... reflector, 12 ...
凹凸部、12a…溝、12b…傾斜部、12c…平坦部、13…筐体、1a、2a…樹脂基板。 Uneven portion, 12a ... groove, 12b ... inclined portion, 12c ... flat portion 13 ... housing, 1a, 2a ... resin substrate.

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2H042 DA11 DA12 DB08 DD01 DD10 DE04 2H091 FA02Y FA08Y FA11Y FA14Y FA23X FB02 FB07 FC26 FD06 FD15 FD23 GA03 GA17 LA11 LA18 MA10 5G435 AA18 BB12 BB16 DD13 EE13 EE22 EE27 FF01 FF05 FF08 ────────────────────────────────────────────────── ─── front page of continued F-term (reference) 2H042 DA11 DA12 DB08 DD01 DD10 DE04 2H091 FA02Y FA08Y FA11Y FA14Y FA23X FB02 FB07 FC26 FD06 FD15 FD23 GA03 GA17 LA11 LA18 MA10 5G435 AA18 BB12 BB16 DD13 EE13 EE22 EE27 FF01 FF05 FF08

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 2枚の対向する基板間に液晶層を有し、 [Claim 1 further comprising a liquid crystal layer between two opposed substrates,
    前面に照明手段となるフロントライトを有する反射型液晶表示器において、 2枚の対向する基板のうち観察者に近い方の第1の基板は、フロントライトの導光板として機能するための凹凸部を観察者側の表面に有し、 フロントライトは、前記第1の基板と、第1の基板の側面に配置された光源とから構成されることを特徴とする反射型液晶表示器。 In the reflection type liquid crystal display device having a front light as the illuminating means to the front, the first substrate that is closer to the viewer out of two opposing substrates, an uneven portion for functioning as a light guide plate of the front light has on the surface of the viewer side, front light, a reflective liquid crystal display device, wherein said first substrate, in that they are composed of a first light source disposed on a side surface of the substrate.
  2. 【請求項2】 請求項1記載の反射型液晶表示器において、 2枚の対向する基板間に、前記フロントライトからの光源光のうち特定の偏光成分を透過させる偏光板と、光学補償を行うための位相差板と、光源光を拡散させる拡散板と、3原色のカラーフィルタと、光透過性の透明電極と、液晶層と、液晶層を透過した光を反射させる反射電極とを有することを特徴とする反射型液晶表示器。 2. A reflection type liquid crystal display device according to claim 1, carried out between two opposing substrates, a polarizing plate that transmits a specific polarized light component of the light source light from the front light, an optical compensation having a phase difference plate for a diffusing plate for diffusing light from the light source, the color filters of three primary colors, and the light transmittance of the transparent electrode, and a liquid crystal layer, and a reflective electrode that reflects light transmitted through the liquid crystal layer reflection type liquid crystal display device according to claim.
  3. 【請求項3】 2枚の対向する基板間に液晶層を有し、 3. A includes a liquid crystal layer between two opposed substrates,
    前面に照明手段となるフロントライトを有する反射型液晶表示器を備えた電子機器であって、 前記反射型液晶表示器の2枚の対向する基板のうち観察者に近い方の第1の基板は、フロントライトの導光板として機能するための凹凸部を観察者側の表面に有し、フロントライトは、前記第1の基板と、第1の基板の側面に配置された光源とからなり、 この反射型液晶表示器を前記第1の基板が外部に露出するように筐体に取り付けることを特徴とする電子機器。 An electronic apparatus with a reflective type liquid crystal display device having a front light as the illuminating means to the front, the first substrate that is closer to the observer of the substrate to two opposite of said reflective liquid crystal display device is , has an uneven portion for functioning as a light guide plate of the front light on the viewer-side surface, the front light consists of a first substrate and a light source disposed on a side surface of the first substrate, the electronic device a reflection type liquid crystal display device wherein the first substrate is characterized in that attached to the housing so as to be exposed to the outside.
JP11191356A 1999-07-06 1999-07-06 Reflective liquid crystal display device and electronic equipment Pending JP2001021883A (en)

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GB0016451A GB2351834B (en) 1999-07-06 2000-07-04 Liquid-Crystal display and electronic device incorporating the display

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