JPS6019123A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS6019123A
JPS6019123A JP12726183A JP12726183A JPS6019123A JP S6019123 A JPS6019123 A JP S6019123A JP 12726183 A JP12726183 A JP 12726183A JP 12726183 A JP12726183 A JP 12726183A JP S6019123 A JPS6019123 A JP S6019123A
Authority
JP
Japan
Prior art keywords
display
liquid crystal
cell
negative
molecules
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
JP12726183A
Other languages
Japanese (ja)
Inventor
Toru Tejima
透 手島
Masahiro Kuniyasu
国安 誠祐
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.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
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 Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP12726183A priority Critical patent/JPS6019123A/en
Publication of JPS6019123A publication Critical patent/JPS6019123A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1347Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13475Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell

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)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

PURPOSE:To raise a response speed and to obtain a sharp display by sealing coloring matter molecules having the same orientation as liquid crystal molecules in an inverting cell of a negative-positive inversion type liquid crystal display device consisting of a TN liquid crystal cell where a transmission colored reflective plate is arranged. CONSTITUTION:In case of negative display where a display cell 1 is driven in the state where an electric field is applied across common electrodes 10a and 10b of an inverting cell 10, an optically rotatory polarization action does not act the part of a display electrode 1b and incident light passes this part as it is, and a color display due to a semi-transmission colored plate 9 appears in a black background. In case of positive display where the electric field of the inverting cell 10 is cut off, the display appears in black; and since the light absorbing action due to coloring matter molecules 12b is increased, the coloring phenomenon due to optically rotatory dispersion of the liquid crystal cell is eliminated, and the exit light has a background of mixed color of the colored reflective plate 9 and coloring matter molecules 12b, and thus, a sharp display is obtained.

Description

【発明の詳細な説明】[Detailed description of the invention]

この発明はポジ表示、ネガ表示の切換えを可能と This invention enables switching between positive and negative display.

【ノた
一IN形液晶表示装置の、特にポジ表示では−Cの背q
1ヲ、よl、=ネガ表示ではその表示部を鮮明なカッ−
・が現われるようにしたものである。 IN形液晶セルを二枚用ねて、一方のセルは表示電極を
i;jJ IJた表示用セルとし、他方のセルはその全
1戎に電441Iを6シ()た反転用セルとで構成した
液晶表示’A fl”7が知られでいる。第2図はこの
詳細を示したちのひ、表示用セル1は基板ガラス1aに
形成しIC数字あるいはパターン等の表示電極11】と
、基板ガラス1aにスペーサ2,2を介して対向配置さ
れた基板ガラス1cには一〇の全域に設置ノられた共通
電極1dとを有し、その内部にI’ N型の液晶層3を
刺入した構成としである。また、反転用セル4は、共用
される基板ガラス1aの他面全域に段りられた共通型j
% 4 aと、スペーサ5゜5を介して対向配置された
基板ガラス/1. IIに設りられた共通電極4Cとを
有し、イの内部にTN型の液晶層6を封入した構成であ
る。7.8は液晶表示装置の両面に夫々対向配回しlζ
1自Fil偏)しく反で、矢印にて示したようにその偏
光方向を一致さ[Cある。9は半透過形の着色反0・1
板Cある。 以上の構成によって次の動作を1−Iることができる。 反転用セル4の共通電極4a、4c間に電弄を印加し、
液晶層すの旋光作用を無くした状態で、表示用セル1を
駆動すると、111線偏光板8によ−)て一方向となっ
た入射光は表示用セル1に於てその表示電極1b部分は
液晶層3の旋光作用が無くなるのでそのま〜通過し、さ
らに反転用セル4、直線(i2光板7を通じて外部に出
射される。一方1..1り水用[!ル1の表示電極1b
以外の部分では、90庶のM[光1′1用を受(プて反
転用セル4を透過し直線板9にJ、つ−((の着色光が
現われる。 次に反転用口ル4の電界を断った状態で表示用セル1を
駆動りると、表示電極1b部分の液晶層3を通過した光
は反転用セル4に至って90度の旋光を一′3.IJ 
、白線偏光板7の偏光方向と直交して遮11Jiされる
1、 ノ゛ノ、表示筒4411 bを除く他の部分は、
)1に品層3により))Ojα旋光されて反転用セル4
に至りこの液晶層6にC再び9()度旋光されて出射す
る。 この場合、直線偏光板7と同一偏光となるので、iLt
 84光が遮断されることはない。したがって、表示電
極′l 1161L分のみが黒色となり背景は着色反射
板9の色と/jるポジ表示が得られる。 な、13、省色反用4& 9が無いとポジ表示の場合白
地(透過光)の背頃に黒地の表示が現われ、所謂TNN
形晶セルと同一の表示となり、ネガ表示の場合黒地の背
景に白地(透過光)のネガ表示となる。しかし着色反射
板9を配置りることにより前記白地(透過光)部分の総
てが着色反射板9の色となり、白黒の単純な表示に比べ
−C表示効果を向上さ4!ることができる。 しかしながら、一般に液晶はルはその応答速度を高める
為セル厚を薄くづることが要求されるが、ヒル厚を簿く
りるとhat光分散にJ、る着色現象が現われ、特に前
記したような着色反!J’+ 41z等によるカラー表
示を得る場合、着色反射板の色と旋光分散による着色と
が混ざり合い鮮明な表示が19られない欠点が有る。し
たがって、この発明の目的は、TN形液晶セルを二層に
して一方を表示用セルとし他方を反転用セルとし、かつ
着色反射板を備えネガ・ポジの選11り表示を可能とし
た液晶表示装置において、その表示面に現われる旋光分
散による着色作用を無くし、ネガ表示にあってはその背
景を、またポジ表示にあってはイの表示部分を鮮明なカ
ラーが現われるようにした液晶表示装置を提供りること
にある。 jス+、(二の5e l!IJ ”A置の実施例につい
て説明する。 なJ> l*l中11」j−若しくは均等箇所は同一符
号にて示しくある。 即ち、反転用l!ル10は、共用のガラス基板1aの他
面に形成した共通電極10aと、スペーサ11゜11を
介しく対向前j’I L/ /こ基板ガラスiobおよ
びこの基板刀ラス10bの内面に設けた共通゛電極10
cと、この内部に」1人しI〔液晶層12とで構成しで
ある。 この液晶層12は、T−N液晶分子12aとこれと同−
配向時11[をイ〕りるI′色性色素による色素分子1
2bとから成−)Cいる。 L、 /jが・ノC1この構成によれば、反転セル10
の」(通電極10a 、 +Oc間に電界を印加した状
態で表示セル1を駆動し)こネガ表示の場合、表示電極
11)部分は旋光作用を受けることなくここに入射した
光はその上)通過し、半透過形の着色板9による♀1色
表示が現われ、一方表示電極1bを除く他の部分l\の
入用光は90痕の旋光を受けるので直線偏光板7の偏光
方向と直交し遮断される。したかって、ネガ表示の場合
黒色の背景に着色反射板9の色が現われる。このネガ表
示の場合、背坊が黒色となりしかも、色素分子1211
による吸光度が大きいので、旋光分散にJ:る着色現象
の影響は現われない。 次に、反転用ヒル10の電界を…1つたポジ表示の場合
、表示電極1bの部分では旋光作用を受りることなく通
過して反転用セル10に至り、ここC旋光される結果表
示は黒色となって現われる5、一方、表示電極1b以外
の部分では90度の旋光を受り反転用セル10に於いて
再び90度旋光され、この旋光11jに色素分子12b
による吸収を受りる結果、出用光は着色反則板9と前記
色素分子12bとのi昆合色による背景となる。 つまり、ネガ表示の場合、黒の背景中に着色反射板の淡
色表示が現われ、またポジ表示の場合着色反射板と色素
分子との混合色による濶い背」中に黒色の表示を得るこ
とができる。そして、ポジ表示の場合、色素分子1bに
よる光の吸収作用が大きくなる結果、混晶セルの旋光分
散による着色現象がなくなり、鮮明な表示を得ることが
できる。 なお、透過形の着色表示板9と色素分子12bの色の組
合せは次のしのが適当である。例えば着色表示板9の色
は青色、色素分子121〕の色を黄色とづると、ポジ表
示の場合背m′/J<緑色で黒の表示となり、ネガ表示
の場合には背明が黒色で青の表示となる。 以、[の説明のように、透過形の着色反射板を配置した
1N液晶セルによるネガ・ポジ反転形液晶表示装置に於
りる反転用セルに、この波晶分tど同一配向を有りる色
素分子をij人したものであるから、セル厚をit9<
L応答迷電を高めたちのCあってら旋光分散による@邑
現象を無くし鮮明な表示が得られる効果がある。 なお、表示用ヒルをドツトマトリクス構造としても同様
な構成で実/II!ll1I能である。また、偏光板の
偏光方向を直交さけると先の説明とtよ逆のポジあるい
はネガ表示を得ることもできる。
[The back q of -C for positive display, especially for IN type liquid crystal display devices.
1 wo, yo l, = In negative display, the display area is shown in sharp contrast.
・ is made to appear. Two IN-type liquid crystal cells are used, one cell is a display cell with display electrodes i; A liquid crystal display 'Afl' 7 constructed with this structure is known. FIG. 2 shows the details of this, in which a display cell 1 is formed on a substrate glass 1a, and display electrodes 11 for displaying IC numbers or patterns, etc. The substrate glass 1c, which is disposed opposite to the substrate glass 1a with spacers 2, 2 in between, has a common electrode 1d installed over the entire area of 10, and an I'N type liquid crystal layer 3 is inserted inside the common electrode 1d. In addition, the inversion cell 4 is a common type j that is stepped over the entire other surface of the shared substrate glass 1a.
% 4 a and the substrate glass disposed opposite to each other with a spacer 5°5 interposed therebetween/1. It has a common electrode 4C provided in the second part II, and a TN type liquid crystal layer 6 is sealed inside the second part A. 7.8 are arranged facing each other on both sides of the liquid crystal display device lζ
1 self-Fil polarization) and the opposite, and the polarization direction is the same as shown by the arrow [C]. 9 is semi-transparent colored anti-0/1
There is board C. With the above configuration, the following operation can be performed in 1-I. Applying an electric current between the common electrodes 4a and 4c of the inversion cell 4,
When the display cell 1 is driven with the optical rotation effect of the liquid crystal layer eliminated, the incident light, which is unidirectional due to the 111-line polarizing plate 8, is directed to the display electrode 1b of the display cell 1. Since the optical rotation effect of the liquid crystal layer 3 disappears, it passes through as it is, and is further emitted to the outside through the inversion cell 4 and the straight line (i2 light plate 7.On the other hand, the display electrode 1b of the liquid crystal layer 1
In the other parts, 90 M[light 1'1] is received and transmitted through the inversion cell 4, and colored light of J and (() appears on the straight plate 9.Next, the inversion opening 4 When the display cell 1 is driven with the electric field cut off, the light that has passed through the liquid crystal layer 3 in the display electrode 1b reaches the inversion cell 4 and rotates by 90 degrees as 1'3.IJ.
, the other parts except for the display tube 4411b which is blocked perpendicularly to the polarization direction of the white line polarizing plate 7 are as follows:
) 1 and layer 3)) Ojα optical rotation and inversion cell 4
Then, C is optically rotated by 9 degrees again in this liquid crystal layer 6 and then emitted. In this case, the polarization is the same as that of the linear polarizing plate 7, so iLt
84 light is never blocked. Therefore, only the display electrode 'l 1161L becomes black, and a positive display whose background is the color of the colored reflective plate 9 is obtained. 13. Without Color Saving Reuse 4 & 9, in the case of positive display, a black background will appear on the back of a white background (transmitted light), which is the so-called TNN.
The display is the same as that of a crystal cell, and in the case of a negative display, it is a negative display with a white background (transmitted light) on a black background. However, by arranging the colored reflector 9, the entire white background (transmitted light) part becomes the color of the colored reflector 9, and the -C display effect is improved compared to a simple black and white display.4! can be done. However, in general, liquid crystal cells are required to have a thin cell thickness in order to increase their response speed, but when the cell thickness is taken into account, a coloring phenomenon appears in the light dispersion, and in particular, the above-mentioned coloring phenomenon occurs. Against! When obtaining a color display using J'+ 41z or the like, there is a drawback that the color of the colored reflecting plate and the coloring due to optical rotation dispersion are mixed, making it impossible to obtain a clear display. Therefore, an object of the present invention is to display a liquid crystal display which has two layers of TN type liquid crystal cells, one of which is a display cell and the other a reversal cell, and which is equipped with a colored reflector and can display negative and positive signals. A liquid crystal display device that eliminates the coloring effect caused by optical rotational dispersion that appears on the display surface, and allows clear colors to appear in the background in negative display and in the display area in positive display. It's about providing. An example of ``A position'' will be explained.J> l*l in 11''j- or equivalent parts are indicated by the same reference numerals. That is, inversion l! A common electrode 10a formed on the other surface of a shared glass substrate 1a and a common electrode 10a are provided on the inner surface of the glass substrate 10b and the glass substrate 10b, which are opposed to each other via a spacer 11゜11. Common electrode 10
C, and a liquid crystal layer 12 inside. This liquid crystal layer 12 includes T-N liquid crystal molecules 12a and the same liquid crystal molecules 12a.
Dye molecule 1 due to I' chromatic dye that changes 11 when oriented
It consists of 2b and -)C. According to this configuration, the inversion cell 10
In the case of negative display (when the display cell 1 is driven with an electric field applied between the conducting electrodes 10a and +Oc), the display electrode 11) is not subjected to optical rotation, and the light incident thereon is The light passes through the transmissive colored plate 9 to display a single ♀ color, while the light in the other parts l\ excluding the display electrode 1b undergoes optical rotation of 90 traces, which is orthogonal to the polarization direction of the linear polarizer 7. and is blocked. Therefore, in the case of negative display, the color of the colored reflector 9 appears on the black background. In the case of this negative display, the spine is black, and the dye molecules are 1211
Since the absorbance is large, the influence of the coloring phenomenon on the optical rotation dispersion does not appear. Next, in the case of a positive display with one electric field of the reversing hill 10, the display electrode 1b passes through without being subjected to optical rotation and reaches the reversing cell 10, where the C-rotated resultant display is On the other hand, the part other than the display electrode 1b undergoes optical rotation of 90 degrees, and is again rotated by 90 degrees in the reversal cell 10, and the dye molecules 12b appear in this optical rotation 11j.
As a result, the emitted light becomes a background due to the combined color of the colored irregular plate 9 and the dye molecules 12b. In other words, in the case of negative display, a light color display of the colored reflector appears in the black background, and in the case of positive display, a black display can be obtained in the "back" due to the mixed color of the colored reflector and dye molecules. can. In the case of positive display, the light absorption effect of the dye molecules 1b increases, so that the coloring phenomenon caused by optical rotation dispersion of the mixed crystal cell is eliminated, and a clear display can be obtained. It should be noted that the following color combinations of the transmissive colored display plate 9 and the dye molecules 12b are suitable. For example, if the color of the colored display plate 9 is blue and the color of the dye molecule 121 is yellow, then in the case of positive display, the backlight is m'/J<green, and the display is black, and in the case of negative display, the backlight is black. It will be displayed in blue. Hereinafter, as explained in [, this wave crystal component t has the same orientation in the reversal cell in a negative/positive reversal type liquid crystal display device using a 1N liquid crystal cell equipped with a transmissive colored reflector. Since the dye molecules are multiplied by ij, the cell thickness should be it9<
By increasing the L-response stray electricity, the C-type has the effect of eliminating the @Yu phenomenon caused by optical rotation dispersion and providing a clear display. Note that the same structure can be used even if the display hill is a dot matrix structure. It is capable of ll1I. Further, if the polarization directions of the polarizing plates are not perpendicular to each other, it is possible to obtain a positive or negative display, which is the opposite of the above explanation.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明装置の断面図、第2図は従来装置の断
面図である。 1:表示用セル 2〜,2:スベーリ 3:液晶層 10:反転用1!ル 11.11:スペーサ 12:溜品層 12a:液晶分子12b : (Q 累j) j’特許
出願人 スタンレー電気株式会着 ′l11−で〕霞 同 秋 元 不二二・′距:′!−1 ゛す
FIG. 1 is a sectional view of the inventive device, and FIG. 2 is a sectional view of the conventional device. 1: Display cell 2~, 2: Smooth 3: Liquid crystal layer 10: Inversion 1! 11.11: Spacer 12: Storage layer 12a: Liquid crystal molecule 12b: (Q) j' Patent applicant Stanley Electric Co., Ltd.'l11-] Kasumi Do Akimoto Fujiji 'List:'! -1 ゛su

Claims (1)

【特許請求の範囲】[Claims] IN形液晶レセル二層とし、一方を表示用セルに、他/
Jを反転用セルとし、かつ透過形の着色反射板を備えネ
ガ・ポジの選択表示を可能とした液晶表示装置偶に於い
C1前記反転用セルはその液晶分子どl1il−配向を
成す色素分子を封入したことを特徴とする液晶表示装置
IN-type liquid crystal cell with two layers, one for display cell and the other/
In a liquid crystal display device in which J is a reversal cell and is equipped with a transmissive colored reflector to enable selective display of negative and positive, C1 is a reversal cell in which the liquid crystal molecules are dye molecules forming a l1il- orientation. A liquid crystal display device characterized by enclosing.
JP12726183A 1983-07-13 1983-07-13 Liquid crystal display device Pending JPS6019123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12726183A JPS6019123A (en) 1983-07-13 1983-07-13 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12726183A JPS6019123A (en) 1983-07-13 1983-07-13 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPS6019123A true JPS6019123A (en) 1985-01-31

Family

ID=14955659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12726183A Pending JPS6019123A (en) 1983-07-13 1983-07-13 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS6019123A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090794A (en) * 1988-11-21 1992-02-25 Sharp Kabushiki Kaisha Method for driving a multi-layered-type liquid crystal display device
JP2001296546A (en) * 2000-02-22 2001-10-26 Asulab Sa Display assembly comprising two superimposed display devices and having contrast inversion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56109389A (en) * 1980-02-01 1981-08-29 Hitachi Ltd Liquid crystal display unit
JPS5740285A (en) * 1980-08-21 1982-03-05 Matsushita Electric Ind Co Ltd Liquid crystal display unit
JPS57171321A (en) * 1981-04-15 1982-10-21 Hitachi Ltd Liquid crystal display element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56109389A (en) * 1980-02-01 1981-08-29 Hitachi Ltd Liquid crystal display unit
JPS5740285A (en) * 1980-08-21 1982-03-05 Matsushita Electric Ind Co Ltd Liquid crystal display unit
JPS57171321A (en) * 1981-04-15 1982-10-21 Hitachi Ltd Liquid crystal display element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090794A (en) * 1988-11-21 1992-02-25 Sharp Kabushiki Kaisha Method for driving a multi-layered-type liquid crystal display device
JP2001296546A (en) * 2000-02-22 2001-10-26 Asulab Sa Display assembly comprising two superimposed display devices and having contrast inversion

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