JPS6348522A - Matrix type liquid crystal display device - Google Patents
Matrix type liquid crystal display deviceInfo
- Publication number
- JPS6348522A JPS6348522A JP61193206A JP19320686A JPS6348522A JP S6348522 A JPS6348522 A JP S6348522A JP 61193206 A JP61193206 A JP 61193206A JP 19320686 A JP19320686 A JP 19320686A JP S6348522 A JPS6348522 A JP S6348522A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- wavelength
- display device
- crystal display
- emission
- 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 25
- 239000011159 matrix material Substances 0.000 title claims description 15
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract description 3
- 229910003437 indium oxide Inorganic materials 0.000 abstract description 3
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000005530 etching Methods 0.000 abstract 1
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000565 sealant Substances 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
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)
- 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、液晶を用いたマトリクス型表示装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a matrix type display device using liquid crystal.
従来の技術
近年、液晶表示装置は、画像表示などのような、より多
くの情報表示を必要とするものが要求され、このためセ
グメント型からドツトマトリクス型構成のものに移行し
、さらにカラー化の方向へ進みつつある。2. Description of the Related Art In recent years, liquid crystal display devices have been required to display more information, such as image display, and for this reason, there has been a shift from segment type to dot matrix type configurations, and colorization. It's moving in that direction.
従来、マトリクス型液晶カラー表示装置は、第３図に示
すように（例えば、特開昭５４−８４９９７号公報）一
対の透明電極をそれぞれ帯状に分割し、−方を走査電極
５、他方を信号電極２として互いに直交するように組合
せ、一方の電極基板１または４の外側には電極２または
５に対応させて複数色のフィルター層３を設けたのち、
一対の電極基板１．４の外側に直線偏光板７を設けた構
成、あるいは複数色のフィルター層３を内面に形成（電
（）２または５の上に形成）した構成（例えば、著イ内
田他“電極上に着色層を設シナだマルチカラー夜晶表示
器”第８回液晶討論会、３Ｗ２０、昭和５７年１０月）
のものが知られ、これろの液晶表示装置の背面光源とし
ては、自然光（太陽光）あるいは、−船釣な蛍光灯９な
どが用いられる。Conventionally, in a matrix type liquid crystal color display device, as shown in FIG. 3 (for example, Japanese Unexamined Patent Publication No. 54-84997), a pair of transparent electrodes is divided into strips, and the - side is used as a scanning electrode 5, and the other side is used as a signal electrode. After combining the electrodes 2 so as to be orthogonal to each other and providing a plurality of colored filter layers 3 on the outside of one electrode substrate 1 or 4 in correspondence with the electrodes 2 or 5,
A configuration in which a linear polarizing plate 7 is provided on the outside of a pair of electrode substrates 1.4, or a configuration in which a plurality of color filter layers 3 are formed on the inner surface (formed on the electrodes 2 or 5) (for example, by Uchida Uchida) et al. “Multi-color night crystal display with colored layer on electrode” 8th Liquid Crystal Symposium, 3W20, October 1982)
Natural light (sunlight) or a fluorescent lamp 9 or the like is used as a backlight source for these liquid crystal display devices.
発明が解決しようとする問題点
従来の構成の液晶表示装置において用いられる背面光源
９は１．一般に照明用として市販されている蛍光灯の場
合、第４図に示すような分光発光特性を有している。Problems to be Solved by the Invention The backlight source 9 used in a liquid crystal display device having a conventional configuration has 1. In general, fluorescent lamps commercially available for illumination have spectral emission characteristics as shown in FIG.
このような光源を利用した場合、表示される画像の色再
現性に関する致命的な欠点があった。すなわち、ツィス
テッドネマチック（以下ＴＮと呼ぶ）液晶を用いた、パ
ッシブ型マトリクス構成の液晶表示装置では、特有の旋
光分散を有し、このためその分光透過特性は、可視波長
帯域で異なる。When such a light source is used, there is a fatal drawback regarding the color reproducibility of displayed images. That is, a liquid crystal display device with a passive matrix structure using twisted nematic (hereinafter referred to as TN) liquid crystal has a unique optical rotation dispersion, and therefore its spectral transmission characteristics differ in the visible wavelength band.
つまり、特に低電圧印加時には長波長成分の光は旋光し
易く、短波長成分の光は旋光しにくいという性質を持っ
ており、このため青成分の光の透過率が悪くなる。In other words, especially when a low voltage is applied, the long wavelength component light is easily rotated, and the short wavelength component light is difficult to rotate, and therefore the transmittance of the blue component light is poor.
従って、ＴＮモードの単純マトリクス型液晶表示装置で
カラー表示を行う場合、青色成分の出力光が弱く、カラ
ーバランスの悪いカラー画像しが表示できないという欠
点があった。Therefore, when color display is performed using a TN mode simple matrix type liquid crystal display device, there is a drawback that the output light of the blue component is weak and a color image with poor color balance cannot be displayed.
問題点を解決するための手段
本発明は、上記問題点を解決するため、液晶を挾む透明
な基板の内面に、互いに直光するように複数の帯状電極
を設け、一方の電極上に複数色のフィルター層を設けて
絵素を複数色表示のマトリクス状に構成し、基板の一方
の外側に、短波長域（青色領域）の発光強度が大きい特
性を有する３波長型の蛍光灯を配置したものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a plurality of strip-shaped electrodes on the inner surfaces of transparent substrates that sandwich a liquid crystal so as to direct light to each other, and a plurality of strip-shaped electrodes on one electrode. A color filter layer is provided to configure picture elements in a matrix that displays multiple colors, and a three-wavelength fluorescent lamp with a characteristic of high emission intensity in the short wavelength region (blue region) is placed on the outside of one side of the substrate. This is what I did.
作用
本発明は、上記のような青色成分の発光強度を大きくし
た３波長型の背面光を用いた構成により、従来、旋光分
散に起因して生じていた青色成分の出力光の減衰がなく
なり、このため色バランスの悪化を改善することができ
る。Function The present invention eliminates the attenuation of the output light of the blue component, which conventionally occurs due to optical rotational dispersion, by using a three-wavelength backlight with increased emission intensity of the blue component as described above. Therefore, deterioration in color balance can be improved.
実施例
以下本発明の一実施例のマｌ−ＩＪクス型液晶表示ｇ装
について図面に基づいて説明する。EXAMPLE Below, a Marx-IJ type liquid crystal display device according to an example of the present invention will be explained based on the drawings.
第１図は本発明のマトリクス型液晶表示装置の構成を模
式的に示した断面図であり、第２図ばその構成要素であ
る背面光源の発光特性である。FIG. 1 is a sectional view schematically showing the structure of a matrix type liquid crystal display device of the present invention, and FIG. 2 shows the light emitting characteristics of a backlight source which is a component thereof.
１は透明なガラス基板であり、この基板１に錫を含む酸
化インジウムの透明導電膜を形成し、これをエツチング
して帯状の信号電極群２を設ける。Reference numeral 1 designates a transparent glass substrate, on which a transparent conductive film of indium oxide containing tin is formed, and this is etched to provide a band-shaped signal electrode group 2.
次にこの信号電極２の上に、複数色゛（例えばＲ２Ｏ，
Ｂ）のカラーフィルター層３を設ける。Next, on this signal electrode 2, a plurality of colors (for example, R2O,
The color filter layer 3 of B) is provided.
ここで、これらのカラーフィルター層の形成手段として
は、ホトリソ手法による染色法あるいは印刷法あるいは
電着法などがあるが、ホトリソ法および電着法は電極と
フィルター層の目合せ精度が良く、微細な電極パターン
へのフィルター層形成に適している。Here, methods for forming these color filter layers include photolithographic dyeing, printing, and electrodeposition, but photolithography and electrodeposition have good alignment accuracy between the electrodes and the filter layer, and fine Suitable for forming filter layers on electrode patterns.
−Ｃにこれらの手法で形成したカラーフィルター層はそ
の被膜が厚いもの程色純度は良いが光の透過率が悪くな
る。The thicker the color filter layer formed on -C by these methods, the better the color purity, but the worse the light transmittance.
一方液晶の特性面からは、フィルター層の被膜が厚くな
ると特性を悪化させるため薄い方が望ましい。On the other hand, from the viewpoint of the characteristics of liquid crystals, the thinner the filter layer is, the more desirable it is because the thicker the film, the worse the characteristics.
従ってカラーフィルター層の被膜厚としては、１．０〜
２．５μｍ程度が好ましい。Therefore, the film thickness of the color filter layer should be 1.0~
The thickness is preferably about 2.5 μm.
次に、もう一方の透明なガラス基板４上には、錫を含む
酸化インジウムの透明導電膜を形成してこれをエツチン
グして帯状の走査電極群５を設ける。Next, on the other transparent glass substrate 4, a transparent conductive film of indium oxide containing tin is formed and etched to form a band-shaped scanning electrode group 5.
これらの基板１，４は、それぞれ信号電極群２と走査電
極群５とが互いに直光するように組合され、一定の間隔
を保たせてその周辺をシール剤でシールし、内部に液晶
材料６を封入する。その後、基板１．４の外側には一対
の直線偏光板７を配置した後、さらに一方の外側に、第
２図に示すような可視域内において、４５０ｎｍ 、５
４５ｎｍ 、および６１０ｎｍにそれぞれ発光のピーク
を持つ３波長型で、かつ、４００〜４８０ｎｍ 、 ４
８０ｎｍ〜５９０ｎｍおよび５９０ｎｍ〜７００ｎｍの
それぞれの波長領域の発光強度の相対比率が４：１：１
の発光特性を持った蛍光灯９を配置してマトリクス型液
晶表示装置を完成させた。These substrates 1 and 4 are assembled so that the signal electrode group 2 and the scanning electrode group 5 are directly illuminated by each other, and the periphery thereof is sealed with a sealant while maintaining a constant interval, and a liquid crystal material 6 is placed inside. Enclose. After that, a pair of linear polarizing plates 7 are arranged outside the substrate 1.4, and then a pair of linear polarizing plates 7 are placed outside one of the plates 1.4 and 450 nm, 5.
It is a 3-wavelength type with emission peaks at 45 nm and 610 nm, and 400 to 480 nm, 4
The relative ratio of the emission intensities in the wavelength ranges of 80 nm to 590 nm and 590 nm to 700 nm is 4:1:1.
A matrix type liquid crystal display device was completed by arranging fluorescent lamps 9 having light emission characteristics.
以上のように構成された実施例のマトリクス型液晶表示
装置は、走査電極を一定の周期で選択し、これと同期さ
せて信号電極には、情報に応じたカラー信号電圧が印加
される。In the matrix type liquid crystal display device of the embodiment configured as described above, the scanning electrodes are selected at regular intervals, and color signal voltages corresponding to information are applied to the signal electrodes in synchronization with this selection.
ここで例えば、白の信号電圧が印加された場合、Ｒ，Ｇ
、Ｂ全ての絵素が表示されるが、従来の構成の表示装置
では、青色成分の出力光量が弱かったため、茶色味を帯
びた白色表示しかできなかった。本実施例の表示装置で
は従来に較べて青色成分の出力光量が増加したため、標
準白色に改善された。For example, if a white signal voltage is applied, R, G
, B are all displayed, but in a display device with a conventional configuration, the amount of output light of the blue component was weak, so only a white color with a brownish tinge could be displayed. In the display device of this example, the amount of output light of the blue component was increased compared to the conventional one, so that the color was improved to standard white.
発明の効果
以上性べてきたように、本発明によれば簡単な構成の改
良によって、カラー表示における色バランスが大巾に改
善されるため、視認性の良い優れたカラー表示が可能で
ある。Effects of the Invention As described above, according to the present invention, the color balance in color display is greatly improved by a simple improvement of the structure, and therefore, excellent color display with good visibility is possible.
第１図は本発明の一実施例におけるマトリクス型液晶表
示装置の構成を模式的に示した断面図、第２図は第１図
の構成要素である背面光源の発光特性図、第３図は従来
のマトリクス型液晶表示装置の構成を示した断面図、第
４図は従来のマｈ ＩＪクス型液晶表示装置に用いられ
た背面光源の発光特性図である。 １．４・・・・・
・透明電極、２・・・・・・信号電極、３・・・・・・
カラーフィルター層、５・・・・・・走査電極、６・・
・・・・液晶材料、７・・・・・・偏光板、８・・・・
・・拡散板、９・・・・・・背面光源。
代理人の氏名 弁理士 中尾敏男 はか１名７．４−一
一逓呵鴬誦
？−−−信号覚槌
３− カラーフィルター層
ｓ−ｉ昼電曝
８− 抹＆仮
ンー 背面光源
第 ２Ｉ２１
Ｏｒ
波長（４ｍ）
第３図
第４図
波長（ｎｍ）FIG. 1 is a sectional view schematically showing the structure of a matrix type liquid crystal display device according to an embodiment of the present invention, FIG. 2 is a light emission characteristic diagram of a back light source which is a component of FIG. 1, and FIG. FIG. 4 is a sectional view showing the structure of a conventional matrix type liquid crystal display device, and FIG. 4 is a diagram showing the light emission characteristics of a backlight source used in a conventional matrix type liquid crystal display device. 1.4...
・Transparent electrode, 2... Signal electrode, 3...
Color filter layer, 5...Scanning electrode, 6...
...Liquid crystal material, 7...Polarizing plate, 8...
... Diffusion plate, 9... Back light source. Name of agent: Patent attorney Toshio Nakao Haka1 person 7.4-11 times 2019? ---Signal alarm 3- Color filter layer s-i daylight exposure 8- Dark & temporary back light source No. 2I21 Or Wavelength (4m) Figure 3 Figure 4 Wavelength (nm)
Claims (1)
直交するように複数の透明な帯状電極を設け、一方の電
極上に複数色のフィルター層を設けて、絵素を複数色表
示のマトリクス状に構成し、前記一対の基板のそれぞれ
の外面に偏光板を設け、一方の偏光板の外面に光源を設
けた透過型表示装置であって、前記光源は、３波長型で
あって、４５０ｎｍ、５４５ｎｍおよび６１０ｎｍにそ
れぞれピーク波長を持ち、かつ、４００ｎｍ〜４８０ｎ
ｍ、４８０ｎｍ〜５９０ｎｍおよび５９０ｎｍ〜７００
ｎｍのそれぞれの波長領域の発光強度の相対比率が、２
〜５：１：１〜１．５であるような３波長型光源を用い
たことを特徴とするマトリクス型液晶表示装置。A plurality of transparent band-shaped electrodes are provided perpendicularly to each other on the inner surfaces of each of a pair of transparent substrates sandwiching a liquid crystal, and a plurality of color filter layers are provided on one electrode, so that picture elements are arranged in a matrix shape for multicolor display. A transmission type display device comprising: a polarizing plate provided on the outer surface of each of the pair of substrates; and a light source provided on the outer surface of one of the polarizing plates, the light source being of a three-wavelength type, with a wavelength of 450 nm, It has a peak wavelength of 545nm and 610nm, respectively, and 400nm to 480nm.
m, 480nm to 590nm and 590nm to 700
The relative ratio of the emission intensity in each wavelength range of nm is 2
A matrix type liquid crystal display device characterized by using a three-wavelength light source having a ratio of 1 to 5:1 to 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61193206A JPS6348522A (en) | 1986-08-19 | 1986-08-19 | Matrix type liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61193206A JPS6348522A (en) | 1986-08-19 | 1986-08-19 | Matrix type liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6348522A true JPS6348522A (en) | 1988-03-01 |
Family
ID=16304065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61193206A Pending JPS6348522A (en) | 1986-08-19 | 1986-08-19 | Matrix type liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6348522A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262525A (en) * | 1988-04-13 | 1989-10-19 | Fujitsu Ltd | Liquid crystal display device |
| EP0349006A2 (en) * | 1988-07-01 | 1990-01-03 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0392811A2 (en) * | 1989-04-14 | 1990-10-17 | Konica Corporation | Transmission type liquid crystal display device |
-
1986
- 1986-08-19 JP JP61193206A patent/JPS6348522A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262525A (en) * | 1988-04-13 | 1989-10-19 | Fujitsu Ltd | Liquid crystal display device |
| EP0349006A2 (en) * | 1988-07-01 | 1990-01-03 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0349006A3 (en) * | 1988-07-01 | 1990-10-17 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| US5414542A (en) * | 1988-07-01 | 1995-05-09 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0392811A2 (en) * | 1989-04-14 | 1990-10-17 | Konica Corporation | Transmission type liquid crystal display device |
| EP0392811A3 (en) * | 1989-04-14 | 1990-12-19 | Konica Corporation | Transmission type liquid crystal display device |
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