JP2005092239A - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
- Publication number
- JP2005092239A JP2005092239A JP2004353174A JP2004353174A JP2005092239A JP 2005092239 A JP2005092239 A JP 2005092239A JP 2004353174 A JP2004353174 A JP 2004353174A JP 2004353174 A JP2004353174 A JP 2004353174A JP 2005092239 A JP2005092239 A JP 2005092239A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- light
- viewing angle
- color
- 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.)
- Granted
Links
Abstract
Description
本発明は、液晶表示ディスプレイ、殊に、大型の画面の場合や、複数の人数で画面を見るような場合に適する液晶表示ディスプレイに関するものである。 The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display suitable for a large screen or when a plurality of people view the screen.
従来より、さまざまなタイプの液晶表示ディスプレイが知られており、特に、ＴＮ型の液晶表示素子を用いた液晶表示ディスプレイは、単純マトリックスの駆動方式によるため構造が単純であり、製造が容易で低価格で製造することができるという利点がある。 Conventionally, various types of liquid crystal display are known. In particular, a liquid crystal display using a TN type liquid crystal display element has a simple structure because of a simple matrix driving method, and is easy to manufacture and low in cost. There is an advantage that it can be manufactured at a price.
液晶表示ディスプレイは、現在、２１型或いはそれ以上の大型のものが試作、研究されているが、例えば複数の人数で画面を見る壁掛けテレビや、ワークステーションの大型ディスプレイ等として用いるために、今後、製造コストの低減とともに広視野角をもつものを開発することが不可欠となる。 Currently, liquid crystal display displays of 21-inch or larger are being prototyped and studied. For example, for use as a wall-mounted TV or a large-sized display for workstations, where multiple screens are used, It is indispensable to develop a product with a wide viewing angle as well as a reduction in manufacturing cost.
ところが、ＴＮ型の液晶表示ディスプレイは、液晶のもつ屈折率異方性の影響で、上下の視野角が狭いうえ、中間調においての視角依存性が特に激しく、上下の方向から見ると画面全体が暗くなって表示内容が見えなくなったり、明暗反転現象が生じたりという視角依存性が問題となっていた。 However, the TN liquid crystal display has a narrow vertical viewing angle due to the refractive index anisotropy of the liquid crystal, and the viewing angle dependency in the halftone is particularly severe. There is a problem with the viewing angle dependency that the display content becomes invisible due to darkness and that a light-dark reversal phenomenon occurs.
この場合、ディスプレイを正面以外から見ることができないだけでなく、例えば大きな画面のものを近い距離から見る場合には、正面から見ても、画面の両端で色や明るさが異なって見えてしまうという問題があった。 In this case, not only can the display not be seen from the front side, but also when looking at a large screen from a short distance, the colors and brightness will look different at both ends of the screen even when viewed from the front side. There was a problem.
そこで、液晶ディスプレイの広視野角を得るために、分割した画素に異なる電圧−透過率特性をもたせる画素分割法と呼ばれる方法や、分割した画素に異なる配向方向を与える配向分割法と呼ばれる方法等が開発されている。 Therefore, in order to obtain a wide viewing angle of a liquid crystal display, there is a method called a pixel division method that gives different voltage-transmittance characteristics to divided pixels, a method called an alignment division method that gives different alignment directions to divided pixels, and the like. Has been developed.
しかし、これらの方法はいずれも、製造時に複雑な工程を有するために、製造が困難であり、コスト高となるうえ、製品の安定性に問題があった。 However, all of these methods have complicated processes at the time of manufacture, so that the manufacture is difficult, the cost is increased, and the stability of the product is problematic.
本発明の目的は、鮮明な表示画像を得ることができる液晶表示ディスプレイを提供することにある。 An object of the present invention is to provide a liquid crystal display capable of obtaining a clear display image.
本発明は、上記目的を達成するため、カラー光源型の液晶表示ディスプレイにおいて、
隣接する画素間で色の滲みを起こりにくくしたことを特徴とする液晶表示ディスプレイを提供する。
In order to achieve the above object, the present invention provides a color light source type liquid crystal display,
Provided is a liquid crystal display characterized in that color bleeding is less likely to occur between adjacent pixels.
また、本発明は、液晶表示ディスプレイの表面カバーの表面または裏面の少なくとも一方に微細な凹凸を有する構成としてもよい。 Moreover, this invention is good also as a structure which has a fine unevenness | corrugation in at least one of the surface or back surface of the surface cover of a liquid crystal display.
表面カバーが微細な凹凸を有することによって、各画素からの光が表面カバーを通過する際に拡散するため、視野角が広くなる。 Since the surface cover has fine irregularities, the light from each pixel diffuses when passing through the surface cover, so that the viewing angle is widened.
また、各画素の周囲に不透光部分を形成することによって、各画素からの光を区別し、光が表面カバーを通過する際に拡散しても、隣接する画素の光同士が互いに混ざり合って色が滲むということが起こりにくく、明確に画面の情報を読みとることができる。 In addition, by forming an opaque part around each pixel, light from each pixel is distinguished, and even if light diffuses when passing through the surface cover, the light from adjacent pixels mixes with each other. Colors are unlikely to bleed and the information on the screen can be read clearly.
更に、導光板と液晶表示素子との間にプリズムシートを配置することによって、光源から各画素に垂直に光が進行するため、より一層、隣接する画素の色が滲みにくくなる。 Furthermore, by disposing a prism sheet between the light guide plate and the liquid crystal display element, light travels perpendicularly from the light source to each pixel, so that the colors of adjacent pixels are more difficult to spread.
本発明によると、隣接する画素間で色の滲みを起こりにくくしたので、鮮明な表示画像を得ることができる。また、液晶表示ディスプレイの構造自体は従来と全く変わらずに、表面カバーに微細な凹凸を設けるだけで、視野角の広い液晶表示が可能となる。従って、容易な工程によって、安価で安定した性能をもつ広視野角な液晶表示ディスプレイを提供することができる。 According to the present invention, since color bleeding is less likely to occur between adjacent pixels, a clear display image can be obtained. Further, the structure of the liquid crystal display itself is not different from that of the prior art, and a liquid crystal display with a wide viewing angle can be realized only by providing fine irregularities on the surface cover. Accordingly, it is possible to provide a liquid crystal display having a wide viewing angle and having stable performance at low cost by an easy process.
また、どのようなタイプの液晶表示ディスプレイにも、同様に実施することができる。 In addition, it can be similarly applied to any type of liquid crystal display.
更に、導光板と液晶表示素子との間にプリズムシートを配置することにより、広視野角となっても、隣接する画素間の色の滲みが一層起こりにくくなるとともに輝度も増す。 Furthermore, by disposing a prism sheet between the light guide plate and the liquid crystal display element, even if a wide viewing angle is obtained, color bleeding between adjacent pixels is less likely to occur and luminance is also increased.
本発明の実施の形態を図面に基づいて説明する。 Embodiments of the present invention will be described with reference to the drawings.
図１は、本発明の実施の形態の一例を用いた液晶表示ディスプレイを示すものであり、液晶表示ディスプレイは、ディスプレイ部１と、バックライト２と、これらの間に配置されたプリズムシート３とからなっている。 FIG. 1 shows a liquid crystal display using an example of an embodiment of the present invention. The liquid crystal display includes a display unit 1, a backlight 2, and a prism sheet 3 disposed therebetween. It is made up of.
ディスプレイ部１の構造は、従来より一般に製造されているＴＮ型液晶表示ディスプレイと同様であり、上層から順に表面カバー１１、液晶表示素子１２、電子回路１３、ガラス基板１４および偏光板１５を積層したものである。 The structure of the display unit 1 is the same as that of a conventionally manufactured TN liquid crystal display, and a surface cover 11, a liquid crystal display element 12, an electronic circuit 13, a glass substrate 14, and a polarizing plate 15 are laminated in order from the upper layer. Is.
一方、バックライト２は、ディスプレイ部１における偏光板１１の下面に配置された導光板２１と、この一方の側面に配置された光源、例えば、Ｒ（赤色）管２２、Ｇ（緑色）管２３、Ｂ（青色）管２４の三色管からなる光源とで構成される。 On the other hand, the backlight 2 includes a light guide plate 21 disposed on the lower surface of the polarizing plate 11 in the display unit 1 and light sources disposed on one side surface thereof, for example, an R (red) tube 22 and a G (green) tube 23. , B (blue) tube 24 and a light source comprising a three-color tube.
そして、表面カバー１１は、例えば板ガラスからなり、その表面に、例えばフッ酸で洗浄する等のように化学的な方法によって、或いは、極めて微細な粉体によるサンドブラスト等のような機械的な方法によって、図１に示すように微細な凹凸を設けてすりガラス状にし、バックライト２から到達した光が拡散して外部に放出されるようにする。これによって、透明ガラスを表面カバーとした場合に比べ、広角に光が放出されるので、広視野角をもったディスプレイとなる。このとき、表面カバー１１の凹凸の大きさは、例えば１μｍ乃至１００μｍ程度とされ、バックライト２の光量や光の拡散度と画素の大きさとの関係等により、適宜調整される。 The surface cover 11 is made of, for example, plate glass, and the surface thereof is subjected to a chemical method such as cleaning with hydrofluoric acid, or a mechanical method such as sand blasting using extremely fine powder. As shown in FIG. 1, fine concavo-convex portions are provided to form a frosted glass shape so that light reaching from the backlight 2 is diffused and emitted to the outside. As a result, light is emitted at a wider angle than when transparent glass is used as the surface cover, so that the display has a wide viewing angle. At this time, the size of the unevenness of the front cover 11 is, for example, about 1 μm to 100 μm, and is appropriately adjusted according to the relationship between the amount of light of the backlight 2, the degree of light diffusion, and the size of the pixels.
更に、各画素の周囲は、例えば金属クロム等で形成される格子状のブラックマトリックスによる不透光部分１６で囲み、各画素間に黒い仕切りを設けることによって、光が拡散しても、隣接する画素の色が互いに混ざりにくくなるようにする。従って、広視野角で且つ鮮明な画像が得られるようになる。 Further, the periphery of each pixel is surrounded by a light-impermeable portion 16 of a grid-like black matrix formed of, for example, metallic chromium, and adjacent to each other even if light is diffused by providing a black partition between the pixels. The pixel colors are made difficult to mix with each other. Accordingly, a clear image with a wide viewing angle can be obtained.
また、プリズムシート３は、従来より使用されているものと同様であり、バックライト２からの光を各画素に垂直方向に進行させるためのものである。これを配置することにより、隣接する画素に誤って光が到達することを防ぎ、広視野角となっても、色の滲みを防ぐことができる。 Further, the prism sheet 3 is the same as that conventionally used, and is for causing the light from the backlight 2 to travel vertically to each pixel. By disposing this, light can be prevented from accidentally reaching adjacent pixels, and color bleeding can be prevented even when the viewing angle is wide.
尚、表面カバー１１をすりガラス状にすることによって生じる可視光透過率の低下に対しては、例えば、前記ブラックマトリックスやプリズムシートの採用の他に、バックライト２の光量の増加等が有効である。 For example, in addition to the use of the black matrix and the prism sheet, an increase in the amount of light of the backlight 2 is effective for reducing the visible light transmittance caused by making the front cover 11 ground glass. .
以上の例では、光源が三色管からなるカラー光源型の液晶表示装置における実施の形態を示したが、光源を白色のみとして、Ｒ，Ｇ，Ｂ三色のカラーフィルタを各画素内に内蔵したカラーフィルタ型の液晶表示装置においても、本発明を同様に実施することができる。 In the above example, the embodiment in the color light source type liquid crystal display device in which the light source is a tri-color tube is shown. However, the light source is only white, and the R, G, B color filters are built in each pixel. The present invention can be similarly implemented in the color filter type liquid crystal display device.
１ ディスプレイ部
２ バックライト
３ プリズムシート
１１ 表面カバー
２１ 導光板
DESCRIPTION OF SYMBOLS 1 Display part 2 Backlight 3 Prism sheet 11 Surface cover 21 Light guide plate
Claims (1)
隣接する画素間で色の滲みを起こりにくくしたことを特徴とする液晶表示ディスプレイ。 In color light source type liquid crystal display,
A liquid crystal display characterized in that color bleeding is less likely to occur between adjacent pixels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004353174A JP4022541B2 (en) | 2004-12-06 | 2004-12-06 | Color light source type liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004353174A JP4022541B2 (en) | 2004-12-06 | 2004-12-06 | Color light source type liquid crystal display |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8069297A Division JPH09236794A (en) | 1996-02-29 | 1996-02-29 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005092239A true JP2005092239A (en) | 2005-04-07 |
| JP4022541B2 JP4022541B2 (en) | 2007-12-19 |
Family
ID=34464452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004353174A Expired - Lifetime JP4022541B2 (en) | 2004-12-06 | 2004-12-06 | Color light source type liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4022541B2 (en) |
-
2004
- 2004-12-06 JP JP2004353174A patent/JP4022541B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP4022541B2 (en) | 2007-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10401693B2 (en) | Liquid crystal module and liquid crystal display device | |
| JP4950480B2 (en) | Liquid crystal display | |
| TWI614555B (en) | Liquid crystal display panel | |
| JP2011076107A (en) | Liquid crystal display | |
| WO2016206261A1 (en) | Viewing angle enlarging film and wide viewing angle thin film transistor liquid crystal display device comprising the same | |
| KR101256668B1 (en) | Optical member, method of manufacturing the optical member, back light assembly haivng the optical member, and display apparatus having the back light assembly | |
| JP7474716B2 (en) | Liquid crystal display panel and display device | |
| CN112130372A (en) | Liquid crystal display panel and liquid crystal display device | |
| CN106501992A (en) | A kind of color membrane substrates and display floater | |
| CN109633968A (en) | Liquid crystal display panel | |
| CN112415820A (en) | Display panel and display device | |
| JP2005092239A (en) | Liquid crystal display | |
| CN113741085B (en) | Double-sided display panel | |
| JPH11167110A (en) | Liquid crystal display device | |
| US20080117368A1 (en) | Liquid crystal panel with a uniform background color | |
| JP4546778B2 (en) | Display device | |
| US9429789B2 (en) | Liquid crystal display module and liquid crystal display panel thereof | |
| JPH09236794A (en) | Liquid crystal display | |
| JPH07110470A (en) | Display device | |
| JP2003344860A (en) | Method for simultaneously manufacturing spacer and protrusion | |
| JP2978110B2 (en) | Liquid crystal display | |
| JP3816463B2 (en) | Display optical element and two-dimensional display device | |
| US20130083259A1 (en) | Optical enhancement for display touchscreen systems | |
| WO2019223467A1 (en) | Liquid crystal television display module and liquid crystal television having same | |
| CN114167619A (en) | 3D display panel and 3D display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20061017 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20061030 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061218 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061226 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20070207 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070409 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20070529 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070705 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070705 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070925 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20071001 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101005 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20161005 Year of fee payment: 9 |
|
| S201 | Request for registration of exclusive licence |
Free format text: JAPANESE INTERMEDIATE CODE: R314201 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20161005 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |