JPS6344621A - Liquid crystal shutter device - Google Patents
Liquid crystal shutter deviceInfo
- Publication number
- JPS6344621A JPS6344621A JP61189209A JP18920986A JPS6344621A JP S6344621 A JPS6344621 A JP S6344621A JP 61189209 A JP61189209 A JP 61189209A JP 18920986 A JP18920986 A JP 18920986A JP S6344621 A JPS6344621 A JP S6344621A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- light
- shutter device
- crystal layer
- crystal shutter
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 60
- 238000002834 transmittance Methods 0.000 claims abstract description 17
- 230000003595 spectral effect Effects 0.000 claims abstract description 14
- 239000003086 colorant Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000001228 spectrum Methods 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
- G02F1/133371—Cells with varying thickness of the liquid crystal layer
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、液晶層の厚さに応じた分光透過率特性でカ
ラー画像を記録できるようにしだ液晶シャッタデバイス
の構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of a liquid crystal shutter device that can record a color image with spectral transmittance characteristics depending on the thickness of a liquid crystal layer.
（発明の技術的背景とその問題点）
従来、液晶シャッタデバイスを用いて感光材料にカラー
画像を記録する場合、−ｆ？ジ的には第５図に示すよう
な溝底としていた。すなわち、白色光の光源１から照射
された光はコンデンサレンズ等で成る光学系２で平行光
に変換され、その平行光が例えばライン構造の液晶シャ
ッタデバイス３に照射さる。そして、この液晶シャッタ
デバイス３は制御装置（図示せず）等からの画像信号に
応じて、ビクセル電極及びコモン電極の間が光学的にオ
ン・オフ制御され、画素単位の光を感光材料５に露光す
るように −５，諸，・ツなっており、液晶シャッ
タデバイス３と感光材料５との間にＲＧＢ ３色のフィ
ルタ４ Ｉｔ 、 ４ Ｇ 、 ４ １１を有するカラ
ーフィルタ４を配設して、ｉｌＧＢの色に応じたフィル
タ４１１．４Ｇ．４Ｂにより画像光を感光材料５に順番
・に記録するようにしている。この場合、カラーフィル
タ４をｌＩＧ［ｌのフィルタｉｎ，４Ｇ。(Technical background of the invention and its problems) Conventionally, when recording a color image on a photosensitive material using a liquid crystal shutter device, -f? Technically, the bottom of the groove was as shown in Figure 5. That is, light emitted from a white light source 1 is converted into parallel light by an optical system 2 comprising a condenser lens, and the parallel light is emitted onto a liquid crystal shutter device 3 having a line structure, for example. The liquid crystal shutter device 3 is optically controlled to turn on and off between the pixel electrode and the common electrode in response to an image signal from a control device (not shown), etc., and sends light in units of pixels to the photosensitive material 5. A color filter 4 having RGB three color filters 4 It, 4 G, 4 11 is disposed between the liquid crystal shutter device 3 and the photosensitive material 5 so as to be exposed to light. , ilGB color filter 411.4G. 4B, the image light is sequentially recorded on the photosensitive material 5. In this case, the color filter 4 is defined as lIG[l filter in, 4G.
４Ｂで機械的に切換えて１ラインの画像を記録した後、
感光材料５に対して次の１ラインとするような１！１２
送’ｌ；ＩＪ御を行なって、順次このような！ラインず
つの記録を行なうことにより感光材料５上にカラー画像
の全体を記録するようにしている。After recording one line of image by mechanically switching with 4B,
1!12 such as the next line for 5 photosensitive materials
Sending 'l; IJ control, one after another like this! The entire color image is recorded on the photosensitive material 5 by recording line by line.
このように、従来の液晶シャッタデバイス３てはカラー
画像を記録する場合に、カラーフィルタ４を用いてＲＧ
Ｂの分解光に従って順番に記録しなけれはならない。こ
のため記録装置が大型化となり、カラーフィルタの制御
が複雑になるといった欠点があった。また、カラーフィ
ルタを用いているので、色の透過効率が悪く、記録画像
に色の濁り等が生ずる欠点もあった。In this way, when recording a color image, the conventional liquid crystal shutter device 3 uses the color filter 4 to
The images must be recorded in order according to the resolved light of B. This has resulted in disadvantages such as the recording apparatus becoming larger and the control of the color filters becoming more complicated. Furthermore, since a color filter is used, the color transmission efficiency is poor, and there is also the drawback that color turbidity occurs in the recorded image.
（発明の目的）
この発明は上述のような事情からなされたものであり、
この発明の目的は、液晶層のＨさに対する分光透過率特
性に基づいて液晶層の厚さを設定し、この設定された液
晶の特定色の透過光によって、カラーフィルタを用いる
ことなくカラー画像を記録できるようにした液晶シャン
クデバイスを１１供することにある。(Object of the invention) This invention was made under the above circumstances,
The purpose of this invention is to set the thickness of the liquid crystal layer based on the spectral transmittance characteristics with respect to the H level of the liquid crystal layer, and to create a color image without using a color filter using the set transmitted light of a specific color of the liquid crystal. To provide a liquid crystal shank device capable of recording data.
（発明の概要）
この発明は液晶シャッタデバイスに関するもので、液晶
層の厚さに対する分光透過率特性に基づいて、特定色を
透過できるような厚さの液晶層が設けられたものである
。(Summary of the Invention) The present invention relates to a liquid crystal shutter device, in which a liquid crystal layer is provided with a thickness that allows transmission of a specific color based on spectral transmittance characteristics with respect to the thickness of the liquid crystal layer.
（発明の実施例）
ところで、強屈電性液晶の光透過率は、液晶の厚さをｄ
、液晶屈折率の異方性をΔｎとした場合、波長λに対し
て、
１−１． （５ｉｎ（４θ） ・５ｉｎ（πｄ Ａｎ／
λ））２・・・・・・・・・（１）
で表わされるので、液晶層の厚さｄと異方性Δｎとの積
に対するその分光透過率特性Ｔｒは、ＲＧＨの色に関し
て第１図のような曲線となる。(Embodiment of the invention) By the way, the light transmittance of a ferroelectric liquid crystal is determined by changing the thickness of the liquid crystal to d.
, when the anisotropy of the liquid crystal refractive index is Δn, with respect to the wavelength λ, 1-1. (5in(4θ) ・5in(πd An/
λ))2・・・・・・・・・(1) Therefore, the spectral transmittance characteristic Tr for the product of the thickness d of the liquid crystal layer and the anisotropy Δn is the first with respect to the RGH color. The result will be a curve as shown in the figure.
すなわち、青色Ｂは波長λ＝ ４５０ｎｍであり、この
数値を上記（１）式に代入することにより一点鎖線Ｂの
ような特性となる。同様に緑色Ｇは波長λ＝ ５５０ｎ
ｍであり、これを（１）式に代入することによって破線
特性Ｇとなり、赤色Ｒは波長λ＝ ６５０ｎｍであり、
これを上記＜１）式に代入することによって実線特性Ｒ
となる。That is, blue color B has a wavelength λ=450 nm, and by substituting this value into the above equation (1), a characteristic as shown by the dashed-dotted line B is obtained. Similarly, green G has wavelength λ = 550n
m, and by substituting this into equation (1), a broken line characteristic G is obtained, and the wavelength of red R is λ = 650 nm,
By substituting this into the above equation <1), the solid line characteristic R
becomes.
この第１図の特性図から明らかなように、ｄ×Δｎが０
．６近辺においては青Ｂの透過率がほぼ＋００零と大き
く、緑Ｇ及び赤Ｒの透過率はほぼ０となっており、ここ
ではＢ光のみが透過されるのである。又、ｄ×Δ口が１
．３２近辺では緑Ｇの分光ｉ’Ｍ ａ 付網、′ｒ＋Ｌ
がＩＯ的近辺であるのに対し、浬Ｂ支び赤Ｒの分光透過
率特性がほぼＯとなっているので、ここではＧ光のみが
液晶を通過することか分る。さらに、ｄ×Δｎが２．２
２近辺では赤色Ｒの分光透過率特性がほぼ１００零であ
るのに対し、青Ｂ及び緑Ｇの分光透過率特性がほぼＯと
なっているので、ここではＲ光のみが液晶を透過するこ
とが分る。As is clear from the characteristic diagram in Figure 1, d×Δn is 0
．． In the vicinity of 6, the transmittance of blue B is as large as approximately +00 zero, and the transmittances of green G and red R are approximately 0, and only B light is transmitted here. Also, d×Δmouth is 1
．． In the vicinity of 32, the green G spectrum i'M a is attached, 'r+L
is in the vicinity of IO, while the spectral transmittance characteristics of light B and red R are approximately O, so it can be seen that only G light passes through the liquid crystal here. Furthermore, d×Δn is 2.2
In the vicinity of 2, the spectral transmittance characteristics of red R are approximately 100 zero, while the spectral transmittance characteristics of blue B and green G are approximately 0, so here only R light passes through the liquid crystal. I understand.
この発明は、このような液晶層の厚さｄ（もしくはｄｘ
Δｎ）に対する分光透過率特性Ｔ「を利用して、第２図
〜第４図に示すようにＢＧＩＩ用の液晶２０８．２０Ｇ
、２０１１の液晶層の厚さ［ｌ［ｌ、［ｌＧ、Ｄｌｌを
異ならせて液晶シャッタデバイス１０を構成している。In this invention, the thickness d (or dx
Using the spectral transmittance characteristic T for Δn), the liquid crystal 208.20G for BGII is
, 2011, the liquid crystal shutter device 10 is configured by varying the thicknesses of the liquid crystal layers [l[l, [lG, Dll].
すなわち、透明基板１２内には層の厚さの異なる液晶２
０１１．２０Ｇ、２０１１が平行なうイン状に配設され
ており、これら液晶２０Ｂ、２０Ｇ、２ＯＲの各上面に
はコモン電８ｉ２１Ｂ、２１Ｇ、２１１＋が配設され、
液晶２０Ｂ、２０Ｇ、２０１１の各下方部には各画素を
規定するビクセル電極１６か、第３図に示すような形状
１間隔で配置されている。そして、透明基板１３には配
向膜１４が層設され、ビクセル電極１６と対応する位置
関係及びサイズで、その配向膜１４内に遮光用のフォト
マスク１５が第３図に示すような配置で設けられている
。この場合、ｌ］Ｇｎ ４５の液晶２０Ｂ、２０Ｇ、２
０１の液晶層の厚さＤＢ、ＤＧ、ＯＲを、第１図で示し
た分光透過率４．１性のｄ×Δｎが０．６．１．３２．
２．２２の関係て封入することによって、白色光の照射
に則してｉｌＥ品２０ＢではＢ光のみが透過し、液晶２
０ＧではＧ光のみが透過し、２０ＲではＲ光のみかａＪ
する。したがって、液晶シャッタデバイスｌＯに照射す
る光源な白色光とした場合でも、ＢＧＩ′ｌの３色に分
解された光を液晶シャッタデバイス１０から出力するこ
とができ、各ＱＧＲの液晶２０Ｂ、２０Ｇ、２ＯＲに応
してビクセル電極１６を制御することによって、画素の
記録をＩＩＧＩＩ毎に行なうことが可能となる。これに
より、カラー画像の記録を行なうことができるのである
。That is, within the transparent substrate 12 there are liquid crystals 2 with different layer thicknesses.
011.20G, 2011 are arranged in a parallel hollow shape, and common electric terminals 8i21B, 21G, 211+ are arranged on the upper surface of each of these liquid crystals 20B, 20G, 2OR,
Below each of the liquid crystals 20B, 20G, and 2011, vixel electrodes 16 defining each pixel are arranged at one interval as shown in FIG. An alignment film 14 is layered on the transparent substrate 13, and a light-shielding photomask 15 is provided within the alignment film 14 in a positional relationship and size corresponding to the pixel electrodes 16 as shown in FIG. It is being In this case, l]Gn 45 liquid crystals 20B, 20G, 2
The thicknesses DB, DG, and OR of the liquid crystal layer of No. 01 and the spectral transmittance d×Δn of 4.1 shown in FIG. 1 are 0.6.1.32.
By enclosing it in accordance with 2.22, only B light passes through the ilE product 20B in accordance with white light irradiation, and the liquid crystal 2
At 0G, only G light passes through, and at 20R, only R light or aJ
do. Therefore, even if white light is used as the light source to irradiate the liquid crystal shutter device 10, light separated into the three colors of BGI'l can be output from the liquid crystal shutter device 10, and the liquid crystals 20B, 20G, 2OR of each QGR can be output from the liquid crystal shutter device 10. By controlling the vixel electrode 16 in accordance with this, it becomes possible to record pixels every IIGII. This makes it possible to record color images.
尚、上述の実施例では液晶シャッタデバイスにＢＧｆｔ
３色の液晶を封入するようにしているが、ＢＧｎのう
ちの１色又は２色の組合わせで設けることも可能である
。さらに、上述の実施例では強話電性液晶を用いている
が、Ｄ へＦ’方式。In addition, in the above embodiment, BGft is used in the liquid crystal shutter device.
Although liquid crystals of three colors are enclosed, it is also possible to provide one color or a combination of two colors of BGn. Furthermore, although the above-mentioned embodiment uses a strong-talking liquid crystal, the D to F' method is used.
ＥＣＢ方式などのツイストしないネマディック液晶を用
いたシステムでも、ｄΔｎの設定を調節ずれは可能であ
る。Even in a system using a non-twisted nematic liquid crystal such as an ECB system, it is possible to adjust the setting of dΔn.
（発明の効果）
以上ようにこの発明の液晶シャッタデバイスによれば、
カラーフィルタやカラー光源を用いることなく ＢＧＲ
の分光透過率特性を得ることができ、白色光によってカ
ラー画像を容易に記録するこ粁が可能となる。又、フィ
ルタ等の光学系を用いることもないので装置か小型化と
なり、色の濁りも少なくシャープな画像を記録すること
か可能となる。(Effects of the Invention) As described above, according to the liquid crystal shutter device of the present invention,
BGR without using color filters or color light sources
It is possible to obtain a spectral transmittance characteristic of 1, and it is possible to easily record a color image using white light. Further, since no optical system such as a filter is used, the apparatus can be made smaller, and it is possible to record sharp images with less cloudy colors.
第１図はこの発明の詳細な説明するための特性図、第２
図はこの発明の一実施例を示す液晶シャッタデバイスの
斜視構造図、第３図はその透明基板１３の斜視構造図、
第４図はこの発明の液晶シャッタデバイスの断面構造図
、第５図は従来の液晶シャッタデバイスによるカラー画
像の記録の様子を説明するための図である。
１・・・光源、２・・・光学系、３・・・液晶シャッタ
デバイス、４・・・カラーフィルタ、５・・−感光材料
、１０・・・液晶シャッタデバイス、１工・・・配向膜
、１２・・・透明基板、１３・・・透明基板、１４・・
・配向膜、１５・・・フォトマスク、１６・・・ビクセ
ル
２０１１・・・Ｉ夜晶、２１Ｂ．２１Ｇ．２１Ｒ・・・
コモン電極。
羊２ 図
÷３副
蔓４ 副
第５図Figure 1 is a characteristic diagram for explaining the invention in detail, Figure 2 is a characteristic diagram for explaining the invention in detail.
The figure is a perspective structural diagram of a liquid crystal shutter device showing one embodiment of the present invention, and FIG. 3 is a perspective structural diagram of its transparent substrate 13.
FIG. 4 is a cross-sectional structural diagram of the liquid crystal shutter device of the present invention, and FIG. 5 is a diagram for explaining how a color image is recorded by a conventional liquid crystal shutter device. DESCRIPTION OF SYMBOLS 1...Light source, 2...Optical system, 3...Liquid crystal shutter device, 4...Color filter, 5...-Photosensitive material, 10...Liquid crystal shutter device, 1...Alignment film , 12...Transparent substrate, 13...Transparent substrate, 14...
- Alignment film, 15... Photomask, 16... Bixel 2011... I night crystal, 21B. 21G. 21R...
Common electrode. Sheep 2 Figure ÷ 3 Sub-vine 4 Sub-figure 5
Claims (3)
、特定色を透過できるような厚さの液晶層が設けられて
いることを特徴とする液晶シャッタデバイス。(1) A liquid crystal shutter device characterized by being provided with a liquid crystal layer having a thickness that allows transmission of a specific color based on spectral transmittance characteristics with respect to the thickness of the liquid crystal layer.
複数の色に応じて配列されている特許請求の範囲第１項
に記載の液晶シャッタデバイス。(2) The liquid crystal shutter device according to claim 1, wherein the specific color is a plurality of colors, and the liquid crystal layer is arranged according to the plurality of colors.
囲第２項に記載の液晶シャッタデバイ ス。(3) The liquid crystal shutter device according to claim 2, wherein the plurality of colors are RGB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18920986A JPH0746186B2 (en) | 1986-08-12 | 1986-08-12 | Liquid crystal shutter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18920986A JPH0746186B2 (en) | 1986-08-12 | 1986-08-12 | Liquid crystal shutter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6344621A true JPS6344621A (en) | 1988-02-25 |
| JPH0746186B2 JPH0746186B2 (en) | 1995-05-17 |
Family
ID=16237364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18920986A Expired - Lifetime JPH0746186B2 (en) | 1986-08-12 | 1986-08-12 | Liquid crystal shutter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0746186B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63272651A (en) * | 1987-04-28 | 1988-11-10 | Sato:Kk | Portable label printing and pasting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133429A (en) * | 1983-12-21 | 1985-07-16 | Seikosha Co Ltd | Liquid-crystal display device |
-
1986
- 1986-08-12 JP JP18920986A patent/JPH0746186B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133429A (en) * | 1983-12-21 | 1985-07-16 | Seikosha Co Ltd | Liquid-crystal display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63272651A (en) * | 1987-04-28 | 1988-11-10 | Sato:Kk | Portable label printing and pasting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0746186B2 (en) | 1995-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69226998T2 (en) | Optical modulation element and devices with such an element | |
| US4842379A (en) | Image recording apparatus utilizing an ECB mode liquid crystal | |
| JP2003066428A (en) | Projector using holographic polymer dispersed liquid crystal | |
| JPH08240867A (en) | Photographic printer | |
| CN103969719A (en) | Triangular prism plate and display device | |
| US5424802A (en) | Photographic printer | |
| US5432624A (en) | Optical display unit in which light passes a first cell, reflects, then passes a second cell | |
| US3776725A (en) | Bi-stimulus print | |
| JPS6344621A (en) | Liquid crystal shutter device | |
| US3323431A (en) | Comparison photometer | |
| US5936708A (en) | Light-pattern illuminating apparatus and light-pattern illuminating method | |
| JPS63148235A (en) | Liquid crystal shutter array | |
| JPH03296720A (en) | Optical modulating device | |
| US5016983A (en) | Drive method of liquid crystal device | |
| JP2004294699A (en) | Display device | |
| KR940003422B1 (en) | Projection type image display device | |
| JPH10111501A (en) | Reflection type liquid crystal display device using hologram | |
| JP3032928B2 (en) | Photo printer | |
| JP3670783B2 (en) | Color liquid crystal display device | |
| JPH01116527A (en) | Optical writing liquid crystal display element and its driving method | |
| JPH09258328A (en) | Projector | |
| JPH0961813A (en) | Liquid crystal display device | |
| RU1775711C (en) | Device for converting black-and-white images into pseudocolour ones | |
| JPH06324347A (en) | Image projection device | |
| JP2751697B2 (en) | Overhead projector |