JPS60202425A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS60202425A JPS60202425A JP59059253A JP5925384A JPS60202425A JP S60202425 A JPS60202425 A JP S60202425A JP 59059253 A JP59059253 A JP 59059253A JP 5925384 A JP5925384 A JP 5925384A JP S60202425 A JPS60202425 A JP S60202425A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- crystal cell
- diffusion
- 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
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 42
- 238000009792 diffusion process Methods 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims 1
- 239000003086 colorant Substances 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 239000011521 glass Substances 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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
- G02F1/133553—Reflecting elements
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は液晶表示装置に関し、特に視角特性の改善に係
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device, and particularly relates to improvement of viewing angle characteristics.
液晶表示装置は、表示パターンを良好に視認できる角度
範囲が狭い欠点を有す。液晶表示装置の従来の応用例で
ある、電子式卓上計算機、デジタル腕時計、工業計測器
等の表示では、観察者が一人であるので見る方向がほぼ
一定しており、視角の狭さは重大な欠点ではなかった。Liquid crystal display devices have the disadvantage that the range of angles in which display patterns can be clearly viewed is narrow. In conventional applications of liquid crystal display devices, such as electronic desktop calculators, digital watches, and industrial measuring instruments, the viewing direction is almost constant because there is only one observer, and the narrow viewing angle is a serious problem. It wasn't a drawback.
しかし液晶表示装置の今後の応用方向である壁かけテレ
ビにおいては、観察者が複数である機会が多くなり広視
角化が強く要求されている。However, in wall-mounted televisions, which are the future application direction of liquid crystal display devices, there is a strong demand for wide viewing angles because there are many opportunities for multiple viewers.
従来は、光源と、偏光板を含む液晶表示パネルとで構成
される液晶表示装置の、液晶表示パネルの手前面に全方
向拡散性の拡散板を用いて広視角化していた。しかしこ
の従来構成では、表示画面が白色化して１表示コントラ
ストや表示色の彩度が著しく低下する欠点を有していた
。表示画面の白色化の機構を追求した結果、原因は以下
のとうりであった。Conventionally, a wide viewing angle has been achieved by using an omnidirectional diffuser in front of the liquid crystal display panel of a liquid crystal display device that includes a light source and a liquid crystal display panel including a polarizing plate. However, this conventional configuration has the disadvantage that the display screen becomes white and the contrast of one display and the saturation of displayed colors are significantly reduced. As a result of investigating the mechanism of whitening of the display screen, the cause was as follows.
液晶セルは上下の基板表面に施こされる配向処理方向の
絹み合わせにより、特定の方向に優先視野方向を有する
。通常のセルにおいては、観察頻度の高い方向として、
正面下方（６時）あるいは正面上方（１２時）に設定さ
れている。優先視野方向を６時とし、液晶セルの配向方
向と偏光板の偏光軸の方向を、液晶セルの印加電圧が零
のとき光が透過しない、ノーマリ黒の組み合わせとした
とき液晶表示パネルの視角特性は、下の特徴を有す。A liquid crystal cell has a preferential viewing direction in a specific direction due to alignment processing performed on the surfaces of the upper and lower substrates. In a normal cell, the most frequently observed direction is
It is set at the lower front (6 o'clock) or upper front (12 o'clock). Viewing angle characteristics of a liquid crystal display panel when the preferred viewing direction is set to 6 o'clock, and the alignment direction of the liquid crystal cell and the direction of the polarization axis of the polarizing plate are set to normally black, where no light passes when the voltage applied to the liquid crystal cell is zero. has the following characteristics.
（１）正面および１２時方向は黒。(1) The front and 12 o'clock direction are black.
（２）６時方向の角度の大きな方向は白。(2) The direction with a larger angle towards 6 o'clock is white.
（３）前２者間の角度では、左右方向も含めて良好な表
示が観察可能。(3) Good display can be observed at the angle between the front two, including in the left and right directions.
全方向性拡散性の拡散板を用いる従来構成における表示
画面の白色化の原因は、前記（２）の６時方向の角度の
大きな方向に出射する白色光が拡散板で拡散す牙１．て
いたことである。The reason for the whitening of the display screen in the conventional configuration using an omnidirectional diffuser is that the white light emitted in the direction with a large 6 o'clock angle is diffused by the diffuser as described in (2) above. That's what I was doing.
本発明は、上記表示画面の白色化の欠点を、光角度制限
部材を用いることで改善し１表示コントラストや表示色
の彩度が高く、広視角の液晶表示装置を提供する。以下
図面を用いて本発明の詳細な説明する。The present invention improves the above-described drawback of whitening of the display screen by using a light angle limiting member, and provides a liquid crystal display device with high display contrast and high saturation of display colors and a wide viewing angle. The present invention will be described in detail below using the drawings.
〔発明の実施例１
第１図に本発明の実施例の構成を示−１−６１は面光源
でＥｌ、蛍光灯等である。２は光角度制限部材であり、
２つの矢印８で囲まれる角度範囲の光のみ出射する。本
実／Ａｉ例では住友スリーエム社製のライトコントロー
ルフィルムを用い、ルーバーを紙面に垂直方向に説定（
７た。[Embodiment 1 of the Invention Fig. 1 shows the configuration of an embodiment of the present invention.-1-61 is a surface light source such as an El or a fluorescent lamp. 2 is a light angle limiting member;
Only light within an angular range surrounded by two arrows 8 is emitted. In this actual/Ai example, a light control film manufactured by Sumitomo 3M is used, and the louver is positioned perpendicular to the paper (
7.
３．７は偏光板である。液晶セル５０は４．５．６０か
らなり、４は下基板であり、５の液晶層の駆動電極およ
び配向層が形成されている。液晶層５はＴＮ液晶、（ｊ
Ｈ液晶で形成した。６０は全方向拡散板を兼ねる上基
板で一方の面には駆１ｆｌ＋電極および配向層が形成さ
れ、他の面には全方向拡散性の拡散面１０を形成した。3.7 is a polarizing plate. The liquid crystal cell 50 consists of 4.5.60, 4 is a lower substrate, and drive electrodes and alignment layers of the liquid crystal layer 5 are formed. The liquid crystal layer 5 is a TN liquid crystal, (j
It was made of H liquid crystal. Reference numeral 60 denotes an upper substrate which also serves as an omnidirectional diffusion plate, on one side of which a diode 1fl+ electrode and an alignment layer are formed, and on the other side an omnidirectional diffusion surface 10 is formed.
上基板厚みは表示画素の幅程度が望ましく１本実施例で
は２００μｍ厚のガラス基板を用いた。偏光板の偏光軸
、配向層の配向方向を、優先視野が第１図の矢印９の方
向となるよう組み合わせた。画像のシャープさを失なわ
ないようにするには、液晶層５と拡散面１０とをできる
だけ近接させることが必要である。The thickness of the upper substrate is preferably about the width of a display pixel, and in this embodiment, a glass substrate with a thickness of 200 μm was used. The polarization axis of the polarizing plate and the alignment direction of the alignment layer were combined so that the preferential field of view was in the direction of arrow 9 in FIG. In order to maintain the sharpness of the image, it is necessary to place the liquid crystal layer 5 and the diffusion surface 10 as close as possible.
第２図（佳極薄ガラス板を上基板６１とする実施例を示
し、厚さ１００μｍのマイクロガラスからなる」二基板
６１の前面に、拡散面２０を有する拡散板１１を配置し
ている。この例では液晶層５と拡散面２０との距離を１
００μｍに近接させることができる。FIG. 2 shows an embodiment in which an extremely thin glass plate is used as the upper substrate 61, and is made of micro glass with a thickness of 100 μm. On the front surface of the second substrate 61, a diffusion plate 11 having a diffusion surface 20 is arranged. In this example, the distance between the liquid crystal layer 5 and the diffusion surface 20 is 1.
It can be made close to 00 μm.
優先視野方向９を実施例においては６時方向としたが、
他の方向に設定することも、光角度制限部材の設定方向
を対応して形成することにより可能である。なお紙面内
での光角度制限とともに紙面垂直方向の光角度を合わせ
て制限する光角度制限部材を用いることも可能である。Although the preferred viewing direction 9 was set to the 6 o'clock direction in the example,
Setting in other directions is also possible by correspondingly forming the setting direction of the light angle limiting member. Note that it is also possible to use a light angle limiting member that limits the light angle in the plane of the paper as well as the light angle in the direction perpendicular to the plane of the paper.
本実施例は、光角度制限部材を用いろことにより、液晶
セルからの白色光が全方向性拡散面に入射しないので、
高コンｉ・ラスト、高彩度で広視角の液晶表示装置であ
る。In this example, by using the light angle limiting member, the white light from the liquid crystal cell does not enter the omnidirectional diffusion surface.
It is a liquid crystal display device with high contrast, high saturation, and wide viewing angle.
以上述べたように１本発明による液晶表示装置は一高コ
ントラストー高彩度、広視角であり、壁かけカラーテレ
ビとして特に有効である。As described above, the liquid crystal display device according to the present invention has high contrast, high chroma, and wide viewing angle, and is particularly effective as a wall-mounted color television.
第１図は本発明の液晶表示装置の構成を示す側面図、第
２図は実施例における拡散板の拡散面と液晶セルの上基
板との配置を示す側面図である。
１・・・・・・面状光源、２・・・・・・光角度制限部
材−６・・・・・・背面偏光板、５０・・・・・・液晶
セル。
６０・・・・・・拡散板を兼ねる上基板。
７・・・・・・前面偏光板、９・・・・・・優先視野方
向、１０．２０・・・・・・拡散面、１１・・・・・・
拡散板。
６１・・・・・・上基板。FIG. 1 is a side view showing the configuration of a liquid crystal display device according to the present invention, and FIG. 2 is a side view showing the arrangement of the diffusion surface of a diffusion plate and the upper substrate of a liquid crystal cell in an embodiment. DESCRIPTION OF SYMBOLS 1... Planar light source, 2... Light angle limiting member-6... Back polarizing plate, 50... Liquid crystal cell. 60... Upper substrate that also serves as a diffusion plate. 7...Front polarizing plate, 9...Priority viewing direction, 10.20...Diffusing surface, 11...
Diffusion board. 61...Top board.
Claims (3)
、背面偏光板と、前記液晶セルの優先視野方向を含む近
傍の光のみを透過する光角鹿制限部材と、面状光源とを
前記の順に配列した液晶表示装置であって、さらに前記
前面偏光板と前記液晶セルとの間に全方向拡散性の拡散
面を有する拡散板が配置されていることを特徴とする液
晶表示装置。(1) A front polarizing plate, a liquid crystal cell having a preferential viewing direction, a rear polarizing plate, an optical angle restriction member that transmits only light in the vicinity including the preferential viewing direction of the liquid crystal cell, and a planar light source. 1. A liquid crystal display device arranged in this order, further comprising a diffusion plate having an omnidirectional diffusion surface disposed between the front polarizing plate and the liquid crystal cell.
徴とする特許請求の範囲第１項に記載の液晶表示装置。(2) The liquid crystal display device according to claim 1, wherein the diffusion plate also serves as a substrate of a liquid crystal cell.
あって、上基板と前記拡散板の背面に設けられた拡散面
とが接するように配置されていることを特徴とする特許
請求の範囲第１項に記載の液晶表示装置。(3) The diffuser plate is constructed separately from the liquid crystal cell. Claims characterized in that an upper substrate (Q) constituting a liquid crystal cell has a thickness of 100 μm or less, and is arranged so that the upper substrate and a diffusion surface provided on the back surface of the diffusion plate are in contact with each other. The liquid crystal display device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59059253A JPS60202425A (en) | 1984-03-27 | 1984-03-27 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59059253A JPS60202425A (en) | 1984-03-27 | 1984-03-27 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60202425A true JPS60202425A (en) | 1985-10-12 |
Family
ID=13108028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59059253A Pending JPS60202425A (en) | 1984-03-27 | 1984-03-27 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60202425A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5018837A (en) * | 1989-07-03 | 1991-05-28 | Motorola, Inc. | Enhanced contrast liquid crystal display device |
| US5629784A (en) * | 1994-04-12 | 1997-05-13 | Ois Optical Imaging Systems, Inc. | Liquid crystal display with holographic diffuser and prism sheet on viewer side |
| EP0777145A3 (en) * | 1995-11-30 | 1998-08-05 | Sony Corporation | Reflective guest-host liquid crystal display device |
-
1984
- 1984-03-27 JP JP59059253A patent/JPS60202425A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5018837A (en) * | 1989-07-03 | 1991-05-28 | Motorola, Inc. | Enhanced contrast liquid crystal display device |
| US5629784A (en) * | 1994-04-12 | 1997-05-13 | Ois Optical Imaging Systems, Inc. | Liquid crystal display with holographic diffuser and prism sheet on viewer side |
| EP0777145A3 (en) * | 1995-11-30 | 1998-08-05 | Sony Corporation | Reflective guest-host liquid crystal display device |
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