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

Reflective liquid crystal display device and electronic equipment

Info

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
Authority
JP
Japan
Prior art keywords
liquid crystal
light
crystal display
substrate
light source
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP11191356A
Other languages
Japanese (ja)
Inventor
Eiichi Fukiharu
栄一 吹春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP11191356A priority Critical patent/JP2001021883A/en
Priority to GB0016451A priority patent/GB2351834B/en
Publication of JP2001021883A publication Critical patent/JP2001021883A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133616—Front illuminating devices
    • 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

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.

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 1. Field of the Invention The present invention relates to a reflection type liquid crystal display and an electronic apparatus provided with the reflection type liquid crystal display.

【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。
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。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。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。2. Description of the Related Art Conventional liquid crystal displays can be roughly classified into a transmission type liquid crystal display and a reflection type liquid crystal display.
In a transmissive liquid crystal display, a backlight is arranged on the back of a liquid crystal cell. On the other hand, since the reflection type liquid crystal display performs display using ambient light, there is an advantage that a backlight is not required and power consumption is small. For this reason, when considering adoption of a liquid crystal display for an electronic device such as a mobile phone, a reflection type liquid crystal display with low power consumption is effective.

【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。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。[0003] However, since the reflection type liquid crystal display uses ambient light, the degree of display luminance greatly depends on the surrounding environment, and especially in darkness such as at night, the display may not be recognized at all. In particular, in a reflective liquid crystal display using a color filter for colorization, the above-described problem is large, and in a case where sufficient ambient light cannot be obtained, in a electronic device such as a mobile phone, a reflective liquid crystal display is used. It is necessary to provide a front light in front of the vehicle.

【０００４】図６は従来の反射型液晶表示器の断面図で
ある。図６の反射型液晶表示器は、ガラス基板２１と、
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。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。FIG. 6 is a sectional view of a conventional reflection type liquid crystal display. The reflection type liquid crystal display of FIG.
A glass substrate 22, a polarizing plate 23 for transmitting a specific polarized light component of the light source light from the front light, a retardation plate 24 for performing optical compensation, a diffusing plate 25 for diffusing the light source light, and three primary colors. It has a color filter 26, a light-transmissive transparent electrode 27, a liquid crystal layer 28, and a reflective electrode 29 that reflects light transmitted through the liquid crystal layer 28. Further, the reflection type liquid crystal display has a light source 30, a reflection plate 31, and a light guide plate 32 which constitute a front light.

【０００５】光源３０から出射した光源光は、導光板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。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。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。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。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。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。Light from the light source 30 is emitted from the light guide plate 3.
The light is directly incident on the light guide plate 2 or is reflected by the reflection plate 31 and is incident on the light guide plate 32. The light guide plate 32 reflects a part of the light source light incident from the side surface and causes the light to enter the polarizing plate 23. As described above, the conventional reflective liquid crystal display has a structure in which the light guide plate 32 of the front light is disposed on the front of the liquid crystal display. Therefore, there has been a problem that the reflection type liquid crystal display becomes thick and heavy. FIG. 7 is a sectional view of a mobile phone provided with the reflective liquid crystal display of FIG. In the conventional mobile phone, since the front cover 34 is disposed on the front surface of the reflection type liquid crystal display of FIG. 6, there is a problem that the mobile phone becomes thick and 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。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。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。As described above, in the conventional reflection type liquid crystal display, since the light guide plate of the front light is disposed in front of the liquid crystal display, the reflection type liquid crystal display becomes thick and heavy. There was a problem of becoming. Further, in an electronic device such as a mobile phone equipped with a reflective liquid crystal display, the front cover is arranged on the front surface of the reflective liquid crystal display, so that the electronic device becomes thick and heavy. SUMMARY An advantage of some aspects of the invention is to provide a reflective liquid crystal display and an electronic device that can realize a reduction in thickness and weight.

【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。また、上述の反射型液晶表示器の１構成例は、
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）
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。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
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。In the reflection type liquid crystal display of the present invention, of the two opposing substrates (1, 2), the first substrate (1) closer to the observer is a front light. A front light having a concavo-convex portion on the observer side for functioning as a light guide plate, the front light including the first substrate and a light source (10) disposed on a side surface of the first substrate; It is. Further, one configuration example of the above-mentioned reflection type liquid crystal display is as follows.
Between two opposed substrates, a polarizing plate (3) for transmitting a specific polarized light component of the light source light from the front light, a phase difference plate (4) for optical compensation, and diffusing the light source light. Diffusion plate (5) and color filters of three primary colors (6)
And a light-transmissive transparent electrode (7), a liquid crystal layer (8), and a reflective electrode (9) for reflecting light transmitted through the liquid crystal layer. In the electronic device of the present invention, the first substrate, which is closer to the observer, of the two opposing substrates of the reflective liquid crystal display has an uneven portion for functioning as a light guide plate of a front light. And a front light comprising the first substrate and a light source disposed on a side surface of the first substrate.
Is mounted on the housing such that the substrate is 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。
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。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。DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] Next, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a reflective liquid crystal display according to a first embodiment of the present invention. The reflective liquid crystal display of the present embodiment transmits a specific polarization component of the light source light from the front light between the glass substrate 1 and the glass substrate 2 in order from the observer's side (the upper side in FIG. 1). A polarizing plate 3, a retardation plate 4 for performing optical compensation, a diffusion plate 5 for diffusing light from a light source, a color filter 6 for three primary colors, a transparent electrode 7 for light transmission, a liquid crystal layer 8, A reflection electrode 9 for reflecting 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
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。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。Further, the reflection type liquid crystal display comprises a light source 10 arranged along the side of the glass substrate 1 and a light source 10
And a reflector 11 for condensing the light from the light source only on the side surface of the glass substrate 1. A cold cathode tube is generally used as the light source 10, but a light-emitting diode that does not require an inverter circuit is suitable when a reflection-type liquid crystal display is mounted on an electronic device such as a mobile phone, where small and light weight is important. .

【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。この反射板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。The reflection plate 11 is provided so as to completely cover the light source 10 and the side surface of the glass substrate 1. This reflector 1
1 has a quadratic curve, and 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。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。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。Next, a method of manufacturing the reflection type liquid crystal display of FIG. 1 will be described. FIG. 2 is an enlarged sectional view of part A of the reflection type liquid crystal display of FIG. In FIG. 2, the description of the polarizing plate 3, the phase difference plate 4, the diffusion plate 5, the color filter 6, the transparent electrode 7, the liquid crystal layer 8, and the reflective electrode 9 is simplified.

【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
及び拡散板５を順次積層し、さらに拡散板５の上にＲ
（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
（Indium Tin Oxide）等からなる透明電極７を順次積層
する。First, a polarizing plate 3 and a retardation plate 4 made of a light-transmitting resin are placed on a transparent glass substrate 1 having a light-transmitting property.
And the diffusion plate 5 are sequentially laminated, and further, R
A color filter 6 made of a colored resin containing dyes and pigments having three primary colors of (red), G (green) and B (blue), ITO
(Indium Tin Oxide) and other transparent electrodes 7 are sequentially laminated.

【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。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
ａと、溝１２ａの壁面である傾斜部１２ｂとから構成さ
れる。凹凸部１２のうち傾斜部１２ｂを除く部分（溝１
２ａの底面を含む）は、平坦部１２ｃとなっている。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。Prior to forming these laminated structures, an uneven portion 12 is previously formed on the surface of the glass substrate 1 opposite to the surface on which the laminated structure is formed. The concave and convex portions 12 are provided at regular intervals and have a depth of 1 to 100 μm.
a and an inclined portion 12b which is a wall surface of the groove 12a. A portion of the uneven portion 12 excluding the inclined portion 12b (groove 1
2a) is a flat portion 12c. Such uneven portions 12 can be formed by, for example, 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。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。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。この空隙に液晶を注入することにより、液晶層８
を形成する。最後に、ガラス基板１の側面に、光源１０
と、光源１０を覆うように反射板１１とを取り付ける。
こうして、反射型液晶表示器の作製が完了する。On the other hand, a reflective electrode 9 made of Al or the like is formed on a transparent glass substrate 2 having a light transmitting property. Next, the glass substrate 1 and the glass substrate 2 are attached so that the transparent electrode 7 and the reflective electrode 9 are opposed to each other and are bonded by an adhesive. At this time, a gap having a predetermined height is formed between the transparent electrode 7 and the reflective electrode 9 by the spacer. By injecting a liquid crystal into this space, the liquid crystal layer 8 is formed.
To form Finally, a light source 10 is provided on the side of the glass substrate 1.
And a reflector 11 so as to cover the light source 10.
Thus, the fabrication of the reflective liquid crystal display 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。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。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。Next, the operation of the above-mentioned reflection type liquid crystal display will be described. Of the light emitted from the light source 10 in all directions, part of the light directly enters the side surface of the glass substrate 1 and the rest enters the reflector 11. Since the cross-sectional shape of the reflector 11 is a quadratic curve, the light source light incident on the reflector 11 is reflected in a direction parallel to the center line of the quadratic curve, and 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。この界面には、傾斜部１２ｂ及び平坦部１
２ｃからなる上側の界面と、下側の界面１２ｄとがあ
る。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。A part of the light source light incident on the glass substrate 1 is incident on the interface between the glass substrate 1 and the surrounding medium. The inclined portion 12b and the flat portion 1
There is an upper interface made of 2c and a lower interface 12d. The light source light incident on the inclined portion 12b, which is a reflecting surface, is reflected by the inclined portion 12b as shown in FIG. 2 and exits the glass substrate 1 at an almost perpendicular angle and enters the polarizing plate 3.

【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。したがって、上側の平坦部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。On the other hand, of the light source light incident on the upper flat portion 12c or the lower interface 12d, light incident at an angle equal to or larger than the incident angle determined by the refractive index of the glass substrate 1 and its surrounding medium is totally reflect. Therefore, the upper flat portion 1
Light that has entered the interface 2c or the lower interface 12d propagates while repeating total reflection between the flat portion 12c and the interface 12d until the light enters the inclined portion 12b.

【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。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。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。Next, the polarizing plate 3 transmits only a specific polarized light component of the light source light incident from the glass substrate 1. The retardation plate 4 performs optical compensation of incident light according to the arrangement of the liquid crystal molecules in the liquid crystal layer 8 in order to improve the contrast ratio. The diffusing plate 5 diffuses the source light so that the light passing through the phase difference plate 4 is 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。これにより、液晶層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。液晶層８を透過した光は反射電極９に入射する。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。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。
こうして、観察者は、表示情報を認識する。A voltage corresponding to information to be displayed is applied to the transparent electrode 7 and the reflective electrode 9. Thereby, the liquid crystal layer 8
Is controlled, and the light source light transmitted through the transparent electrode 7 and incident on the liquid crystal layer 8 is subjected to light modulation. Light transmitted through the liquid crystal layer 8 enters the reflective electrode 9. The light reflected by the reflection electrode 9 reaches the glass substrate 1 along a path opposite to the incident light. Part of the light that reaches the glass substrate 1 passes through the glass substrate 1 and reaches the eyes of the observer.
Thus, the observer 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。As described above, in the present invention, the glass substrate 1 which is closer to the observer among the two opposing glass substrates 1 and 2 has a function as a light guide plate of a front light. Thin and light weight can be realized by one light guide plate.

【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。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。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。
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
に形成する凹凸部の形状を鋸波状としてもよい。[Embodiment 2] FIG. 3 is a sectional view of a reflection type liquid crystal display according to another embodiment of the present invention. In the first embodiment, the glass substrates 1 and 2 are used, but instead of the glass substrates 1 and 2, transparent resin substrates 1a and 2a having optical transparency may be used. Further, as shown in FIG. 3, the order of the phase difference plate 4 and the diffusion plate 5 may be changed.
Further, in the first embodiment, the shape of the uneven portion 12 formed on the glass substrate 1 is a shape having the inclined portion 12b and the flat portion 12c, but the glass substrate 1 or the resin substrate 1a
The shape of the concavo-convex portion formed on the substrate 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
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。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。[Embodiment 3] FIG. 4 is an external view of a portable telephone equipped with a reflective liquid crystal display of the present invention.
FIG. 5 is a cross-sectional view in which the mobile phone of FIG. 4 is cut along a line CC ′ and a portion B is enlarged. In FIG. 4, reference numeral 13 denotes a housing of a mobile phone, 14 denotes an antenna, 15 denotes a receiver, and 16 denotes a keypad.

【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。なお、
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。As shown in FIG. 5, in this embodiment, the reflection type liquid crystal display of the first or second embodiment is attached to the housing 13 of the portable telephone without separately providing a front cover. Thus, the front cover can be omitted, and a reduction in thickness and weight can be realized. In addition,
In the present embodiment, a mobile phone has been described as an example of the electronic apparatus, but it is needless to say that the present invention is not limited to a 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, the first substrate, which is closer to the observer, of the two opposing substrates has the function as the light guide plate of the front light, so that one light guide plate is omitted. It has the same effect as that of the prior art, and can achieve a reduction in thickness and weight as compared with the related art.

【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
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。Further, by attaching the reflection type liquid crystal display to the housing such that the first substrate is exposed to the outside,
Since the substrate functions as a front cover, the front cover can be omitted, and a thin and lightweight electronic device can be realized.

【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。FIG. 1 is a cross-sectional view of a reflective liquid crystal display according to 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。FIG. 2 is an enlarged sectional view of a part of the reflection type liquid crystal display 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。FIG. 3 is a sectional view of a reflective liquid crystal display according to 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。FIG. 4 is an external view of a mobile phone equipped with the reflective liquid crystal display of the present invention.

【図５】 図４の携帯電話機の要部断面図である。FIG. 5 is a sectional view of a main part of the mobile phone shown in FIG. 4;

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

【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。FIG. 7 is a cross-sectional view of a mobile phone including the reflective liquid crystal display of FIG.

【符号の説明】[Explanation of symbols]

１、２…ガラス基板、３…偏光板、４…位相差板、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…
凹凸部、１２ａ…溝、１２ｂ…傾斜部、１２ｃ…平坦
部、１３…筐体、１ａ、２ａ…樹脂基板。1, 2, glass substrate, 3 polarizing plate, 4 retardation plate, 5
Diffusion plate, 6 ... Color filter, 7 ... Transparent electrode, 8 ... Liquid crystal layer, 9 ... Reflection electrode, 10 ... Light source, 11 ... Reflection plate, 12 ...
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 ──────────────────────────────────────────────────続 き Continuing on the front page 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 FF01 EE27 FF

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 ２枚の対向する基板間に液晶層を有し、
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。A liquid crystal layer is provided between two opposing substrates,
In a reflection type liquid crystal display having a front light serving as an illuminating means on a front surface, a first substrate closer to an observer among two opposing substrates has an uneven portion for functioning as a light guide plate of the front light. A reflection type liquid crystal display, which is provided on the surface on the observer side, wherein the front light includes the first substrate and a light source disposed on a side surface of the first substrate. 【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. The reflection type liquid crystal display according to claim 1, wherein a polarizing plate for transmitting a specific polarization component of the light source light from the front light is provided between two opposing substrates, and optical compensation is performed. , A diffuser for diffusing light from the light source, a color filter for three primary colors, a transparent electrode having a light transmission property, a liquid crystal layer, and a reflective electrode for reflecting light transmitted through the liquid crystal layer. A reflective liquid crystal display device characterized by the following. 【請求項３】 ２枚の対向する基板間に液晶層を有し、
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。3. A liquid crystal layer is provided between two opposing substrates,
An electronic apparatus including a reflective liquid crystal display having a front light serving as an illumination unit on a front surface, wherein a first substrate closer to an observer among two opposing substrates of the reflective liquid crystal display is: An uneven portion for functioning as a light guide plate of the front light is provided on the surface on the observer side, and the front light includes the first substrate and a light source disposed on a side surface of the first substrate; An electronic device, wherein a reflective liquid crystal display is mounted on a housing such that the first substrate is exposed to the outside.
JP11191356A 1999-07-06 1999-07-06 Reflective liquid crystal display device and electronic equipment Pending JP2001021883A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11191356A JP2001021883A (en) 1999-07-06 1999-07-06 Reflective liquid crystal display device and electronic equipment
GB0016451A GB2351834B (en) 1999-07-06 2000-07-04 Liquid-Crystal display and electronic device incorporating the display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11191356A JP2001021883A (en) 1999-07-06 1999-07-06 Reflective liquid crystal display device and electronic equipment

Publications (1)

Publication Number Publication Date
JP2001021883A true JP2001021883A (en) 2001-01-26

Family

ID=16273223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11191356A Pending JP2001021883A (en) 1999-07-06 1999-07-06 Reflective liquid crystal display device and electronic equipment

Country Status (2)

Country Link
JP (1) JP2001021883A (en)
GB (1) GB2351834B (en)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007527036A (en) * 2004-03-05 2007-09-20 アイディーシー、エルエルシー Integrated modulator lighting
KR100922447B1 (en) * 2002-10-18 2009-10-21 하이디스 테크놀로지 주식회사 Reflective type liquid crystal display
US7733439B2 (en) 2007-04-30 2010-06-08 Qualcomm Mems Technologies, Inc. Dual film light guide for illuminating displays
US7750886B2 (en) 2004-09-27 2010-07-06 Qualcomm Mems Technologies, Inc. Methods and devices for lighting displays
US7766498B2 (en) 2006-06-21 2010-08-03 Qualcomm Mems Technologies, Inc. Linear solid state illuminator
US7777954B2 (en) 2007-01-30 2010-08-17 Qualcomm Mems Technologies, Inc. Systems and methods of providing a light guiding layer
US7845841B2 (en) 2006-08-28 2010-12-07 Qualcomm Mems Technologies, Inc. Angle sweeping holographic illuminator
US7855827B2 (en) 2006-10-06 2010-12-21 Qualcomm Mems Technologies, Inc. Internal optical isolation structure for integrated front or back lighting
US7864395B2 (en) 2006-10-27 2011-01-04 Qualcomm Mems Technologies, Inc. Light guide including optical scattering elements and a method of manufacture
US7907319B2 (en) 1995-11-06 2011-03-15 Qualcomm Mems Technologies, Inc. Method and device for modulating light with optical compensation
US8040588B2 (en) 2004-09-27 2011-10-18 Qualcomm Mems Technologies, Inc. System and method of illuminating interferometric modulators using backlighting
US8040589B2 (en) 2008-02-12 2011-10-18 Qualcomm Mems Technologies, Inc. Devices and methods for enhancing brightness of displays using angle conversion layers
US8049951B2 (en) 2008-04-15 2011-11-01 Qualcomm Mems Technologies, Inc. Light with bi-directional propagation
US8061882B2 (en) 2006-10-06 2011-11-22 Qualcomm Mems Technologies, Inc. Illumination device with built-in light coupler
US8107155B2 (en) 2006-10-06 2012-01-31 Qualcomm Mems Technologies, Inc. System and method for reducing visual artifacts in displays
US8118468B2 (en) 2008-05-16 2012-02-21 Qualcomm Mems Technologies, Inc. Illumination apparatus and methods
US8169688B2 (en) 2004-09-27 2012-05-01 Qualcomm Mems Technologies, Inc. System and method of reducing color shift in a display
US8346048B2 (en) 2008-05-28 2013-01-01 Qualcomm Mems Technologies, Inc. Front light devices and methods of fabrication thereof
US8654061B2 (en) 2008-02-12 2014-02-18 Qualcomm Mems Technologies, Inc. Integrated front light solution
US8798425B2 (en) 2007-12-07 2014-08-05 Qualcomm Mems Technologies, Inc. Decoupled holographic film and diffuser
US8872085B2 (en) 2006-10-06 2014-10-28 Qualcomm Mems Technologies, Inc. Display device having front illuminator with turning features
US8902484B2 (en) 2010-12-15 2014-12-02 Qualcomm Mems Technologies, Inc. Holographic brightness enhancement film
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
KR101610453B1 (en) 2011-04-11 2016-04-07 쌩-고벵 글래스 프랑스 Illuminated double glazing

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2364157A (en) * 2000-02-10 2002-01-16 Michael Anthony Hands Display device
US20030001985A1 (en) * 2001-06-28 2003-01-02 Steve Doe Electronic display
US8358266B2 (en) 2008-09-02 2013-01-22 Qualcomm Mems Technologies, Inc. Light turning device with prismatic light turning features
WO2010082952A1 (en) 2009-01-13 2010-07-22 Qualcomm Mems Technologies, Inc. Large area light panel and screen
US8402647B2 (en) 2010-08-25 2013-03-26 Qualcomm Mems Technologies Inc. Methods of manufacturing illumination systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970008351B1 (en) * 1991-12-03 1997-05-23 샤프 가부시끼가이샤 Liquid crystal display device
US5477239A (en) * 1993-11-12 1995-12-19 Dell Usa, L.P. Front lighting system for liquid crystal display
DE19521254A1 (en) * 1994-06-24 1996-01-04 Minnesota Mining & Mfg Display system with brightness boosting film
JP2000251514A (en) * 1999-03-03 2000-09-14 Nec Corp Reflection type lighting system for illuminating object
SG80614A1 (en) * 1999-03-16 2001-05-22 Motorola Inc Display assembly for an electronic device

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7907319B2 (en) 1995-11-06 2011-03-15 Qualcomm Mems Technologies, Inc. Method and device for modulating light with optical compensation
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
KR100922447B1 (en) * 2002-10-18 2009-10-21 하이디스 테크놀로지 주식회사 Reflective type liquid crystal display
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
JP2012027477A (en) * 2004-03-05 2012-02-09 Qualcomm Mems Technologies Inc Integrated modulator illumination
JP2007527036A (en) * 2004-03-05 2007-09-20 アイディーシー、エルエルシー Integrated modulator lighting
US7706050B2 (en) 2004-03-05 2010-04-27 Qualcomm Mems Technologies, Inc. Integrated modulator illumination
JP2010156979A (en) * 2004-03-05 2010-07-15 Idc Llc Integrated modulator illumination
US7880954B2 (en) 2004-03-05 2011-02-01 Qualcomm Mems Technologies, Inc. Integrated modulator illumination
US8169689B2 (en) 2004-03-05 2012-05-01 Qualcomm Mems Technologies, Inc. Integrated modulator illumination
US7750886B2 (en) 2004-09-27 2010-07-06 Qualcomm Mems Technologies, Inc. Methods and devices for lighting displays
US8169688B2 (en) 2004-09-27 2012-05-01 Qualcomm Mems Technologies, Inc. System and method of reducing color shift in a display
US8040588B2 (en) 2004-09-27 2011-10-18 Qualcomm Mems Technologies, Inc. System and method of illuminating interferometric modulators using backlighting
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US7766498B2 (en) 2006-06-21 2010-08-03 Qualcomm Mems Technologies, Inc. Linear solid state illuminator
US7845841B2 (en) 2006-08-28 2010-12-07 Qualcomm Mems Technologies, Inc. Angle sweeping holographic illuminator
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US8872085B2 (en) 2006-10-06 2014-10-28 Qualcomm Mems Technologies, Inc. Display device having front illuminator with turning features
US8107155B2 (en) 2006-10-06 2012-01-31 Qualcomm Mems Technologies, Inc. System and method for reducing visual artifacts in displays
US8061882B2 (en) 2006-10-06 2011-11-22 Qualcomm Mems Technologies, Inc. Illumination device with built-in light coupler
US7855827B2 (en) 2006-10-06 2010-12-21 Qualcomm Mems Technologies, Inc. Internal optical isolation structure for integrated front or back lighting
US7864395B2 (en) 2006-10-27 2011-01-04 Qualcomm Mems Technologies, Inc. Light guide including optical scattering elements and a method of manufacture
US7777954B2 (en) 2007-01-30 2010-08-17 Qualcomm Mems Technologies, Inc. Systems and methods of providing a light guiding layer
US7733439B2 (en) 2007-04-30 2010-06-08 Qualcomm Mems Technologies, Inc. Dual film light guide for illuminating displays
US8798425B2 (en) 2007-12-07 2014-08-05 Qualcomm Mems Technologies, Inc. Decoupled holographic film and diffuser
US8654061B2 (en) 2008-02-12 2014-02-18 Qualcomm Mems Technologies, Inc. Integrated front light solution
US8040589B2 (en) 2008-02-12 2011-10-18 Qualcomm Mems Technologies, Inc. Devices and methods for enhancing brightness of displays using angle conversion layers
US8049951B2 (en) 2008-04-15 2011-11-01 Qualcomm Mems Technologies, Inc. Light with bi-directional propagation
US8118468B2 (en) 2008-05-16 2012-02-21 Qualcomm Mems Technologies, Inc. Illumination apparatus and methods
US8346048B2 (en) 2008-05-28 2013-01-01 Qualcomm Mems Technologies, Inc. Front light devices and methods of fabrication thereof
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9121979B2 (en) 2009-05-29 2015-09-01 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US8902484B2 (en) 2010-12-15 2014-12-02 Qualcomm Mems Technologies, Inc. Holographic brightness enhancement film
KR101610453B1 (en) 2011-04-11 2016-04-07 쌩-고벵 글래스 프랑스 Illuminated double glazing

Also Published As

Publication number Publication date
GB0016451D0 (en) 2000-08-23
GB2351834B (en) 2001-08-15
GB2351834A (en) 2001-01-10

Similar Documents

Publication Publication Date Title
JP2001021883A (en) Reflective liquid crystal display device and electronic equipment
US7301591B2 (en) Liquid crystal display device wherein the number of light emitting elements activated differs depending on whether display is performed by the first or second liquid crystal panel
US7139053B2 (en) Double-sided liquid crystal display device
KR200332340Y1 (en) Liquid crystal display device and electronic apparatus
USRE41678E1 (en) Half reflection type liquid crystal display device having matched phase of transmitted and reflected light
US6747714B2 (en) Liquid crystal display device and electronic apparatus incorporating the liquid crystal display
KR20040094636A (en) Transflective color liquid crystal display with internal rear polarizer
JP2003215639A (en) Liquid crystal display device
KR20040081001A (en) Liquid crystal display module
JP2001222005A (en) Liquid crystal device and electronic appliance
JP2006058331A (en) Display apparatus
JPH11109337A (en) Liquid crystal device and electronic equipment
JP6644510B2 (en) Lighting device, display device, and television receiver
US7268844B2 (en) Liquid crystal display device
JP2004045727A (en) Liquid crystal display device
CN114077093B (en) Side-entering type light source, backlight module and display device
KR20030068323A (en) Reflection and penetration type liquid crystal display
JP2003195288A (en) Semi-transmission type liquid crystal display
JPH07333606A (en) Liquid crystal display device
JP3899711B2 (en) Liquid crystal device and electronic device
JP2000221492A (en) Reflective liquid crystal display element
JP3870148B2 (en) Display device and portable information terminal device
JP4048725B2 (en) Liquid crystal device and electronic device
JP2003172927A (en) Substrate for transmission and reflection type display unit
JP3996795B2 (en) Liquid crystal display device and portable terminal