JPS5910926A - Color display device - Google Patents
Color display deviceInfo
- Publication number
- JPS5910926A JPS5910926A JP57120983A JP12098382A JPS5910926A JP S5910926 A JPS5910926 A JP S5910926A JP 57120983 A JP57120983 A JP 57120983A JP 12098382 A JP12098382 A JP 12098382A JP S5910926 A JPS5910926 A JP S5910926A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- light
- display
- reflected
- liquid crystal
- 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
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
- G02F1/1347—Arrangement 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
- G02F1/13476—Arrangement 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 assumes a scattering state
Landscapes
- Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はカラー表示装置に関し、とりわけ光学活性液
晶を用いたカラー表示装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color display device, and more particularly to a color display device using optically active liquid crystal.
従来、カラー表示装置としてツイストネマティック液晶
とカラー（Ｍ元板とを組合せたものが知られている、こ
の表示装置は偏光板を使うので光量が減って暗くなり、
またカラー偏光板として完全な機能を果すものがないの
で、カラー表示部以外にも同系色の色がつき見た目のコ
ントラストが低いなどの欠点があった。またゲストホス
ト型の液晶表示装置も知られているが、色素の２色比が
十分でないのでコントラストが低く、表示部分と非表示
部分が同系色になり見た目のコントラストが息くなり、
さらに現在便える色素が眠られているので、柚々の色を
出すため色素を混ぜて使用するとクリアーな色が出せな
い、などの欠点があっｆｃ。Conventionally, a color display device that combines a twisted nematic liquid crystal and a color (M base plate) is known. This display device uses a polarizing plate, so the amount of light decreases and becomes dark.
Furthermore, since there is no one that fully functions as a color polarizing plate, there are drawbacks such as similar colors appearing on areas other than the color display area, resulting in low contrast in appearance. Guest-host type liquid crystal display devices are also known, but because the two-color ratio of the pigment is not sufficient, the contrast is low, and the display and non-display areas become similar in color, resulting in poor visual contrast.
Furthermore, since the pigments that are currently available are not available, there are drawbacks such as the inability to produce clear colors when mixed with pigments to produce the yuzu color.
この発明は光学活性液晶を用いて新規なカラー表示装置
を提供するものである。This invention provides a novel color display device using optically active liquid crystals.
つぎに実施例について説明する、 透明基板１９．２０間に表示体層６が保持される。Next, examples will be explained. The display layer 6 is held between the transparent substrates 19 and 20.
この表示体層３は透明モードと散乱モードと全制御可能
なものでなければならない、、表示体層３として用いら
れるものとして液晶や強誘電性透明セラミックがある、
液晶としては、ｐｆＭネマティック液晶にカイラル材を
混入したフェイズチェンジ型のもの、ｐ型スメクティッ
ク液晶にカイラル材を混入した電気熱光学効果型のもの
、ｎ型ネマティック液晶にイオンドーパントを混入しｉ
Ｄ Ｓ Ｍ（タイナミツクスキャタリングモード）型
のモ（７）などがあげられるが、蛍丁ゐに透明モードと
散乱モードとを制御できるものであればよい、強誘電性
透明セラミックとしては、光学的性責が印加しｆｃ′ｒ
ｔ圧によって変るＰＬＺＴセラミックが知ら扛ている。This display layer 3 must be fully controllable between transparent mode and scattering mode. Liquid crystals and ferroelectric transparent ceramics can be used as the display layer 3.
Liquid crystals include phase change type liquid crystals, which are pfM nematic liquid crystals mixed with chiral materials, electrothermo-optic type liquid crystals, which are p-type smectic liquid crystals mixed with chiral materials, and n-type nematic liquid crystals mixed with ion dopants.
Examples of ferroelectric transparent ceramics include DSM (dynamic scattering mode) type ceramics (7), but as long as the transparent mode and scattering mode can be precisely controlled, ferroelectric transparent ceramics can be used. Optical sexual responsibility is applied fc'r
PLZT ceramics that change depending on the t-pressure are well known.
透明電極１・２の対向■には透明電極４・５が形成され
る。透明基板２と背面基板６との間には光学活性液晶層
７が設けられる、この光学活性液晶層７としては、コレ
ステリック液晶、カイラルネマティック液晶およびそれ
らの混合液晶の他、単独では液晶相をとらない光学活性
物質や光学不活性液晶との混合液晶などが用いられ、可
視域の特定の波長を反射するように調整されたものであ
る。、ｆＣとえは緑色の元を反射し、その補色の赤紫色
元全選Ａするものを用いる。背圓基板乙には鏡１反射板
８が設けられる。鏡面反射板８の材料としては、アルミ
、銀などが用いられ心。なお上述の実施例に２いて、光
学活性液晶は基８２２゜６間に挾１れ、一般釣には法人
、塗布などによって設けられる。しかし、現在、液晶を
マイクロカプセル比重ゐ手法が開発されているので、マ
イクロカプセル化した光学活性液晶を透明バインダーに
分散し、了ルミホイルまたはアルミなどを蒸着したプラ
ス千ツクシートに塗布し、透明基板に貼り句けると製造
が容易でかつ薄型にできる。Transparent electrodes 4 and 5 are formed opposite to the transparent electrodes 1 and 2. An optically active liquid crystal layer 7 is provided between the transparent substrate 2 and the rear substrate 6. This optically active liquid crystal layer 7 can be made of cholesteric liquid crystal, chiral nematic liquid crystal, a mixed liquid crystal thereof, or a liquid crystal that does not have a liquid crystal phase when used alone. It uses a liquid crystal mixture with an optically active substance or an optically inactive liquid crystal, and is adjusted to reflect a specific wavelength in the visible range. , fC is used to reflect the green element and to select the reddish-purple element of its complementary color. A mirror 1 and a reflecting plate 8 are provided on the back circular substrate B. Aluminum, silver, etc. are used as the material for the specular reflection plate 8. In the above-mentioned embodiment 2, the optically active liquid crystal is sandwiched between the bases 822.degree.6, and for general fishing, it is provided by a corporation, coating, etc. However, a method has now been developed for liquid crystal microencapsulation, in which microencapsulated optically active liquid crystal is dispersed in a transparent binder, coated on a plastic sheet coated with luminescent foil or aluminum, and then placed on a transparent substrate. In short, it is easy to manufacture and can be made thin.
つさ゛に表示作用について説明する。I will briefly explain the display function.
い唸光学活性液晶層７が緑色の元を反射し、他の波長の
元すなわち赤紫色光を透過するものとする。表示体層３
が透明モードのＡの部分では、入射光は表示体層を透過
し、光学活性液晶Ｊｌ ７により緑色光が反射され、そ
の他の元は透過する。透過した元は鏡面反射板８により
反射され、再び光学活性液晶層、表示体ＪｆＩｋを通っ
て外に出る。表示パネルを垂直に立てて、光が王に斜め
上７Ｊ＝ら入る通常の使用状態では、鋭１反射板８で反
射された赤紫色光はその多くが斜め下刃に反射されゐこ
とになり、正［ｌ］］句近たら見た場合には、緑色光の
刀が優る。よってこの部分は明るいクリアーな緑色に見
える。つぎに表示体Ｊ＊ Ｂが散乱モードのＢの部分で
は゛、入射光は表示体層で一部散乱反射される、ここを
透過した元は光学活性液晶層７で緑色光が反射され、透
過光は鏡面反射板８で反射されて出てぐるが光重は減っ
ている、したがってこの部分はわずかに緑色味をおびた
白い散乱に見える。ｍとえばＢの部分を背景部としてＡ
の部分でセグメント表示すると、わずかに緑味をおびた
白色散乱地の中に鮮明な緑色で文字等が表示される。It is assumed that the optically active liquid crystal layer 7 reflects green light and transmits red-violet light of other wavelengths. Display layer 3
In the part A in transparent mode, the incident light is transmitted through the display layer, the green light is reflected by the optically active liquid crystal Jl 7, and the other light is transmitted. The transmitted light is reflected by the specular reflector 8 and passes through the optically active liquid crystal layer and the display JfIk again to the outside. In normal use, when the display panel is held vertically and light enters the screen diagonally from above, most of the reddish-purple light reflected by the sharp 1 reflector 8 is reflected by the diagonally lower blade. , If you look at the correct [l]] clause, the sword of green light is superior. Therefore, this part appears bright and clear green. Next, in the part B where the display J* B is in the scattering mode, the incident light is partially scattered and reflected by the display layer, and the green light that originally passed through this is reflected by the optically active liquid crystal layer 7 and is transmitted. The light is reflected by the specular reflector 8 and goes out, but the weight of the light is reduced, so this part looks like white scattering with a slight green tinge. m For example, use part B as the background part and create A
When segment display is performed on the area, characters etc. are displayed in clear green in a white scattered background with a slight green tinge.
第２図の実施例が第１図の実施例と違う点に、表示体層
と光学活性液晶層との位置関係が逆になっていることで
ある。透明基板９・１０間に光学活性液晶層１１が設け
られる。透明基板１０と背ｌ基１ｆ１１２との間に表示
体層１３が配置され、それぞれの基数に透明電極１４お
よびｖ！、（２）反射板１５が形成される。この鏡面反
射板１５は電極を兼ねるものである。なお前述のように
、光学活性液晶をマイクロカプセル化し、透明バインダ
ーに分散したものを透明基板１０の表面に塗れば＠面の
透明基＆９は不賛になる。The embodiment shown in FIG. 2 differs from the embodiment shown in FIG. 1 in that the positional relationship between the display layer and the optically active liquid crystal layer is reversed. An optically active liquid crystal layer 11 is provided between transparent substrates 9 and 10. A display layer 13 is arranged between the transparent substrate 10 and the back l base 1f112, and a transparent electrode 14 and a v! , (2) the reflection plate 15 is formed. This specular reflection plate 15 also serves as an electrode. As mentioned above, if the optically active liquid crystal is microencapsulated and dispersed in a transparent binder and applied to the surface of the transparent substrate 10, the transparent group &9 on the @ side becomes unfavorable.
第２図の実施例の表示作用についてみると、表示体層１
５が透明モードのＡ′の部分では、入射光は光学活性液
晶層１１により緑色光が反別され、その他の元は逍過丁
ゐ。透過光は表示体層１３を通り＊ｏ反射也１５により
反射されて外へ出てくる。表示パネルを垂直に立てて、
光が王に斜め上刃〃・ら入る辿′帛の使用状態では、鋭
１反射叛にて反射された赤紫色光はその多くが斜め下刃
に反射されることになり、正面付近から見几場合には、
緑色光の刀が優る。よってこの部分は明るいクリアーな
緑色に見える、つぎに表示体層１３が散乱モードである
Ｂ′の部分についてみると、入射光は光学活性液晶層１
１で緑色光が反引され他の元は透過する、透過光は表示
体層１３により一部は散乱され、筐たここを透過した元
は反射板１５で反引され、再び表示体層、光学活性液晶
層を辿って出てくるが、この反射光は光量が減っている
。したがってこの部分はわず７１）に緑色ｌ＃をおびた
臼い散乱に見える。第１図の実施例と対比丁ゐと、Ａ′
はＡと、Ｂ′はＢとそれぞれ同様の表示がなさｎ／）、
なお以上の記述では説明の都合上、光学活性液晶層７．
１１での反射成長は緑色光としているが光学活性液晶は
いわゆる選択性散乱という光学的特性を有しており、見
る角度によって反射光の色が変わる。また温度によって
も色が変る性買を有しているのでこうした虞を考慮して
表示装置をつくる必侠がある。Looking at the display function of the embodiment shown in FIG. 2, the display layer 1
In the part A' where 5 is in the transparent mode, the green light of the incident light is separated by the optically active liquid crystal layer 11, and the other elements are filtered out. The transmitted light passes through the display layer 13, is reflected by the *o reflector 15, and comes out. Stand the display panel vertically,
When the light enters the center diagonally from the upper blade, most of the reddish-purple light reflected by the sharp 1-reflector will be reflected by the diagonally lower blade, making it difficult to see from near the front. In case of
The green light sword is superior. Therefore, this part looks bright and clear green.Next, if we look at part B' where the display layer 13 is in the scattering mode, the incident light is reflected in the optically active liquid crystal layer 1.
1, the green light is reflected and the other elements are transmitted. Part of the transmitted light is scattered by the display layer 13, and the light that has passed through the casing is reflected by the reflection plate 15, and is reflected again by the display layer, The reflected light follows the optically active liquid crystal layer and emerges, but the amount of this reflected light is reduced. Therefore, this part appears to be just 71) slightly scattered with green l#. Comparison with the embodiment shown in FIG.
is not indicated in the same way as A, and B' is not indicated in the same way as B, respectively (n/),
In the above description, for convenience of explanation, the optically active liquid crystal layer 7.
Although the reflected growth in 11 uses green light, optically active liquid crystals have an optical property called selective scattering, and the color of the reflected light changes depending on the viewing angle. Furthermore, since the color may change depending on the temperature, it is necessary to create a display device with this possibility in mind.
さらに光学活性液晶の中には、電界効果型の特性がある
ものがあることが知られており、電圧を印加して、この
電圧をコントロールすることにより表示色を変えること
ができる、このことヲ利用した例が、第６図の実施例で
ある。、透明基板１６゜１７によ他表示体層１８が挾筐
れ、両基板には、透明電極１９．２０が形成されている
。透明基板１７と背ｌ基板２１との間には、光学活性液
晶層２２が挾１れ、それぞれの基板に透明［ｍ２３およ
び電極を兼ねるｖｌ■反荊反射４が設けられている。こ
のような表示構造をとることにより一上記光学油性液晶
増２２で呈色をコントロールし、削ｌの表示体層１８で
透明と散乱とをコントロールすることにより、同一平面
上で明るい散乱の下地に機成の鮮明なカラーを同時に表
示することができる。Furthermore, it is known that some optically active liquid crystals have field-effect properties, and by applying a voltage and controlling this voltage, the displayed color can be changed. An example in which this method is utilized is the embodiment shown in FIG. Another display layer 18 is sandwiched between transparent substrates 16 and 17, and transparent electrodes 19 and 20 are formed on both substrates. An optically active liquid crystal layer 22 is sandwiched between the transparent substrate 17 and the back l substrate 21, and each substrate is provided with a transparent [m23] and a vl-reflector 4 that also serves as an electrode. By adopting such a display structure, the color development is controlled by the optical oil-based liquid crystal layer 22, and the transparency and scattering are controlled by the display layer 18, so that a bright scattering base can be formed on the same plane. It is possible to display vivid colors of the machine at the same time.
不発明では反射鈑として説面反則板を用いているが、他
の反射数を用いた場合は良い結果がえられな炉った。−
、鏡１反￥Ｕ板の代りに暗色散乱反射板を用いると、特
電反射波長のクリアーな色と、同色の散乱カラーとの表
示になってコントラストが置くとれなかった。また明色
散乱反射板を用いると、反射板の白と明るい散乱とでほ
とんどコントラストがとれなかった。−ｒなわち鏡開反
射板を使った場合だけ良好なコントラストのものがえら
れた。In the invention, a reflective plate was used as a reflective plate, but good results could not be obtained if other reflective numbers were used. −
When a dark-colored scattering reflector was used instead of the mirror 1 anti-U plate, the clear color of the special electric reflection wavelength was displayed with the same scattering color, and the contrast could not be maintained. Furthermore, when a bright color scattering reflector was used, there was almost no contrast between the white of the reflector and the bright scattering. -r, that is, good contrast was obtained only when a mirror-opening reflector was used.
上述の構成よりなる不発明にか〃為ゐカラー表示装置に
よれは、明ゐい色による表ボ會クリアに出すことができ
、しかもコントラストが尚いものが得られる。The inventive color display device having the above-mentioned structure can clearly display the front background in bright colors and also provide a high contrast.
第１〜３図はそれぞれ本発明の夷ぬ例の断囲説明図であ
る。
３．１３．１８・・・表示体層
７．１１．２２・・・光学活性液晶層
８．１５．２４・・・鋭１反射依
以 上1 to 3 are cross-sectional explanatory diagrams of exemplary embodiments of the present invention, respectively. 3.13.18... Display layer 7.11.22... Optically active liquid crystal layer 8.15.24... Acute 1 reflection or more
Claims (4)
と、透明モードと散乱モードとを制御可能な表示体層と
を重ね、その背後に礎１反射叡を設けたカラー表示装置
。(1) A color display device in which an optically active liquid crystal layer that reflects wavelengths in the visible range and a display layer that can control transparent mode and scattering mode are stacked on top of each other, and a base 1 reflector is provided behind the layer.
学活性液晶層を設けた特許請求の範囲第１項のカラー表
示装置。(2) The color display device according to claim 1, wherein the display layer is previously disposed and the optically active liquid crystal layer is provided behind it.
後に上記表示体Ｊ＠を設けた特許請求の範囲第１項のカ
ラー表示装置、(3) A color display device according to claim 1, in which an optically active liquid crystal layer is previously disposed, and the display body J@ is provided behind it.
第１項のカラー表示装置。 （５１上記表示体層は強誘電性透明セラミックよりなる
特許請求の範囲第１項のカラー表示装置。 ＋６） 上記光学活性液晶は電界効果型のもので、印
加電圧により表示色を変える構成としたことを詩情と丁
ゐ特許請求の範囲第１項に記載のカラー表示装置。(4) The color display device according to claim 1, wherein the display layer is made of liquid crystal. (51) The color display device according to claim 1, in which the display layer is made of ferroelectric transparent ceramic. +6) The optically active liquid crystal is of a field effect type, and the display color is changed depending on the applied voltage. A color display device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57120983A JPS5910926A (en) | 1982-07-12 | 1982-07-12 | Color display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57120983A JPS5910926A (en) | 1982-07-12 | 1982-07-12 | Color display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5910926A true JPS5910926A (en) | 1984-01-20 |
| JPH0377492B2 JPH0377492B2 (en) | 1991-12-10 |
Family
ID=14799873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57120983A Granted JPS5910926A (en) | 1982-07-12 | 1982-07-12 | Color display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02134614A (en) * | 1988-11-15 | 1990-05-23 | Ricoh Co Ltd | Color image projector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49126353A (en) * | 1973-04-04 | 1974-12-03 | ||
| JPS50100486U (en) * | 1974-01-19 | 1975-08-20 | ||
| JPS55106418A (en) * | 1979-02-09 | 1980-08-15 | Citizen Watch Co Ltd | Liquid crystal display device |
| JPS55138780A (en) * | 1979-04-17 | 1980-10-29 | Seiko Instr & Electronics | Phase transform type liquid crystal display device |
-
1982
- 1982-07-12 JP JP57120983A patent/JPS5910926A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49126353A (en) * | 1973-04-04 | 1974-12-03 | ||
| JPS50100486U (en) * | 1974-01-19 | 1975-08-20 | ||
| JPS55106418A (en) * | 1979-02-09 | 1980-08-15 | Citizen Watch Co Ltd | Liquid crystal display device |
| JPS55138780A (en) * | 1979-04-17 | 1980-10-29 | Seiko Instr & Electronics | Phase transform type liquid crystal display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02134614A (en) * | 1988-11-15 | 1990-05-23 | Ricoh Co Ltd | Color image projector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0377492B2 (en) | 1991-12-10 |
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