JPH04143733A - Photoconduction type liquid crystal light valve - Google Patents

Photoconduction type liquid crystal light valve

Info

Publication number
JPH04143733A
JPH04143733A JP26816890A JP26816890A JPH04143733A JP H04143733 A JPH04143733 A JP H04143733A JP 26816890 A JP26816890 A JP 26816890A JP 26816890 A JP26816890 A JP 26816890A JP H04143733 A JPH04143733 A JP H04143733A
Authority
JP
Japan
Prior art keywords
liquid crystal
substrate
transparent substrate
light valve
thermal expansion
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
JP26816890A
Other languages
Japanese (ja)
Inventor
Hiroshi Yokoi
横井 啓
Hideki Hatano
秀樹 畑野
Masayuki Iwasaki
正之 岩崎
Takashi Yamaji
崇 山路
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP26816890A priority Critical patent/JPH04143733A/en
Publication of JPH04143733A publication Critical patent/JPH04143733A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)

Abstract

PURPOSE:To joining transparent substrates across a uniform gap and to obtain a projection image with superior resolution by making the coefficient of thermal expansion of the transparent substrate which seals a write side smaller than that of the transparent substrate which seals a read side. CONSTITUTION:The 1st transparent substrate A which is arranged on the write side and the 2nd transparent substrate B which is arranged on the read side are sealed with thermosetting resin 22 at high temperature with liquid crystal orienting films 4 and 3 in while the proper gap is held by spacers 2. The coefficient alphaB of thermal expansion of the substrate B is larger than the coefficient alphaA of the substrate A, so the substrate B absorbs the curvature of the substrate A which is generated at the time of the filming of a-Si in addition to the thermal expansion of the substrate A which is caused at the time of heating and the thermosetting resin 22 is solidified in this state, so that while the substrates A and B are united after being cooled, the external abutting surface of a fiber plate 11 is corrected into a plane. Consequently, the photoconduction type liquid crystal light valve which forms a projection image with superior resolution while the gap is uniformed is obtained.

Description

【発明の詳細な説明】 技術分野 本発明は、投射型液晶表示装置に用いられる光導電型液
晶ライトバルブに関する。
TECHNICAL FIELD The present invention relates to a photoconductive liquid crystal light valve used in a projection type liquid crystal display device.

背景技術 第1図は光導電型液晶ライトバルブの一例を示すブロッ
ク図であり、図において液晶層1の周りにはスペーサ2
が設けられ、液晶層1の両面には液晶配向膜3,4が配
されている。この液晶層1と光導電膜5とが光反射膜(
誘電体ミラー)6及び光吸収膜(光遮断膜)7を挟んで
積層されている。光反射膜6は読出し側から入射する読
出し光を反射するためのもの、光吸収膜7は光反射膜6
からの漏れ光を吸収するためのものである。液晶層1と
光導電膜5の外側には透明電極としての透明導電膜8,
9が配されており、これらの全てはガラス基板10及び
ファイバープレート11によって封止されている。透明
導電膜8.9の間には交流電圧が駆動電源12によって
印加されている。
Background Art FIG. 1 is a block diagram showing an example of a photoconductive liquid crystal light valve. In the figure, a spacer 2 is placed around a liquid crystal layer 1.
are provided, and liquid crystal alignment films 3 and 4 are arranged on both sides of the liquid crystal layer 1. The liquid crystal layer 1 and the photoconductive film 5 are a light reflecting film (
They are stacked with a dielectric mirror (dielectric mirror) 6 and a light absorption film (light blocking film) 7 sandwiched therebetween. The light reflection film 6 is for reflecting the readout light incident from the readout side, and the light absorption film 7 is for reflecting the readout light incident from the readout side.
This is to absorb light leaking from the A transparent conductive film 8 as a transparent electrode is provided on the outside of the liquid crystal layer 1 and the photoconductive film 5.
9 are arranged, and all of these are sealed with a glass substrate 10 and a fiber plate 11. An alternating current voltage is applied between the transparent conductive films 8 and 9 by a drive power source 12.

この光導電型液晶ライトバルブ(以下LCLVと称す)
を用いて、例えばCRTからの入射画像を書込み光とし
た投射型デイスプレィの構成の一例を第2図に示す。図
において、第1図に挙げたLCLV13の書込み側のフ
ァイバープレート11は、CRT14のフェイスプレー
トに接合される。CRT14のフェイスプレート接合面
もファイバープレート15で構成されており、屈折率マ
ツチング液16を充填する間隙を介して上記LCLV1
3のファイバープレート11と接着される。
This photoconductive liquid crystal light valve (hereinafter referred to as LCLV)
FIG. 2 shows an example of the configuration of a projection type display using, for example, an incident image from a CRT as the writing light. In the figure, the writing side fiber plate 11 of the LCLV 13 shown in FIG. 1 is joined to the face plate of the CRT 14. The face plate joint surface of the CRT 14 is also composed of a fiber plate 15, and the LCLV 1 is connected to the LCLV 1 through a gap filled with a refractive index matching liquid 16.
It is bonded to the fiber plate 11 of No. 3.

CRT14より入射される書込み光としての入射画像は
、LCLV13の内部で結像光学系を透過せず、入射画
像及びその光量に応じた当該液晶層1の配向変化をもた
らす。
An incident image as a writing light incident from the CRT 14 does not pass through the imaging optical system inside the LCLV 13, and causes an orientation change of the liquid crystal layer 1 according to the incident image and the amount of light.

一方、LCLV13の読出し側ではスクリーン17へ投
写するための光学系が構成されており、光源18より発
射された読出し光は、レンズ19を介して偏光プリズム
20によって反射され、LCLV13の読出し側に入射
される。そして、上記液晶層1の配向変化すなわちCR
T14からの入射画像に応じた輝度をもって当該読出し
光が反射される。この反射された読出し光は、投射出力
光として偏光プリズム20を透過した後、レンズ21を
介してスクリーン17に投写される。
On the other hand, on the readout side of the LCLV 13, an optical system for projecting onto the screen 17 is configured, and the readout light emitted from the light source 18 is reflected by a polarizing prism 20 via a lens 19 and enters the readout side of the LCLV13. be done. Then, the orientation change of the liquid crystal layer 1, that is, CR
The readout light is reflected with a brightness that corresponds to the incident image from T14. This reflected readout light is projected onto the screen 17 via the lens 21 after passing through the polarizing prism 20 as projected output light.

ところで、従来はLCLV13のファイバープレート1
1のファイバープレート15との当接面が平坦でなく湾
曲することがあった。この場合、ファイバープレート1
1とファイバープレート15との間の屈折率マツチング
層を形成する間隙が不均一となるのである。
By the way, conventionally the fiber plate 1 of LCLV13
In some cases, the contact surface with the fiber plate 15 of the fiber plate 1 was not flat and curved. In this case, fiber plate 1
The gap forming the refractive index matching layer between the fiber plate 1 and the fiber plate 15 becomes non-uniform.

この間隙の不均一は、解像度のむらとなって投写映像に
現われるので両者の密着性は極めて重要である。該解像
度向上の面から両者の間隙は、狭くかつ均一であること
が望ましい。
This non-uniformity of the gap appears in the projected image as uneven resolution, so the adhesion between the two is extremely important. In order to improve the resolution, it is desirable that the gap between the two be narrow and uniform.

発明の目的 よって、本発明は上記のような問題点を排除するために
なされたものであり、その目的とするところは、CRT
等の書込み光源のフェイスプレートと当該光導電型液晶
ライトバルブの書込み側フェイスプレートとの当接接合
において、その間隙を均一にし投写映像の解像度の優れ
た光導電型液晶ライトバルブを提供することである。
According to the purpose of the invention, the present invention was made to eliminate the above problems, and the purpose is to
By providing a photoconductive liquid crystal light valve which has a uniform gap between the face plate of a writing light source such as the above and the writing side face plate of the photoconductive liquid crystal light valve and has excellent resolution of a projected image. be.

発明の構成 本発明による光導電型液晶ライトバルブは、積層される
光導電層及び液晶層の外側に一対の透明電極が配され、
書込み側に配される第1の透明基板と読出し側に配され
る第2の透明基板とによって封止された構成の光導電型
液晶ライトバルブであって、前記第1の透明基板は前記
第2の透明基板よりも小なる熱膨張係数を有することを
特徴とするものである。
Structure of the Invention The photoconductive liquid crystal light valve according to the present invention includes a pair of transparent electrodes disposed outside the laminated photoconductive layer and liquid crystal layer,
A photoconductive liquid crystal light valve configured to be sealed by a first transparent substrate disposed on the write side and a second transparent substrate disposed on the read side, the first transparent substrate being sealed with the first transparent substrate disposed on the read side. It is characterized by having a smaller coefficient of thermal expansion than the transparent substrate No. 2.

発明の作用 本発明による光導電型液晶ライトバルブにおいては、読
出し側封止基板と書込み側封止基板との熱膨張係数差の
故に、液晶用セルギャップの形成時、書込み側フェイス
プレートの湾曲が矯正される。
Effect of the Invention In the photoconductive liquid crystal light valve according to the present invention, due to the difference in coefficient of thermal expansion between the read-side sealing substrate and the write-side sealing substrate, the curvature of the write-side face plate occurs when forming the liquid crystal cell gap. be corrected.

実施例 本実施例を光導電型液晶ライトバルブの作製法の一例と
ともに第3図を用いて説明する。
EXAMPLE This example will be explained with reference to FIG. 3 along with an example of a method for manufacturing a photoconductive liquid crystal light valve.

11はLCLV13の書込み側の封止基板となるファイ
バープレートであり、熱膨張係数をαAとするものであ
る。この面上には透明導電膜9、例えばアモルファスQ
シリコン(以下a−5iと称す)からなる光導電膜5、
光吸収膜7及び光反射膜6が順次成膜される。さらに、
この光反射膜上には基板や液晶に適した配向剤もしくは
配向性によって、液晶配向膜が形成される。こうして、
液晶用セルギャップにおける書込み側の基板Aが構成さ
れる。ここでは、光導電膜5を成膜した時の圧縮応力の
ため、ファイバープレート11が光導電膜5を外側にす
る様に反り返ってしまう状態となる。
A fiber plate 11 serves as a sealing substrate on the writing side of the LCLV 13, and has a coefficient of thermal expansion αA. On this surface, a transparent conductive film 9, for example, an amorphous Q
a photoconductive film 5 made of silicon (hereinafter referred to as a-5i);
A light absorption film 7 and a light reflection film 6 are sequentially formed. moreover,
A liquid crystal alignment film is formed on this light reflection film using an alignment agent or alignment property suitable for the substrate and liquid crystal. thus,
A writing side substrate A in the liquid crystal cell gap is configured. Here, due to compressive stress when the photoconductive film 5 is formed, the fiber plate 11 is warped so that the photoconductive film 5 is placed on the outside.

一方、LCLV13の読出し側の封止基板となるガラス
基板10は、熱膨張係数αBを有し、上記書込み側の基
板Aにおけるファイバープレート11の熱膨張係数αA
とは、αAくαBなる関係が成立するものである。そし
てこの面上には、透明導電膜8が成膜されるとともに、
上記書込み側と同様、配向処理された液晶配向膜3が形
成されて液晶用セルギャップにおける読出し側の基板B
が構成される。
On the other hand, the glass substrate 10 serving as the sealing substrate on the reading side of the LCLV 13 has a coefficient of thermal expansion αB, and the coefficient of thermal expansion αA of the fiber plate 11 in the substrate A on the writing side
means that the relationship αA x αB holds true. A transparent conductive film 8 is formed on this surface, and
Similar to the writing side, the substrate B on the reading side in the liquid crystal cell gap is formed with an alignment-treated liquid crystal alignment film 3.
is configured.

次に、基板Aと基板Bはそれぞれ液晶配向膜3及び4を
内側としてスペーサ2による適切な間隔を保持しながら
、接着剤もしくは封止剤と呼ばれる熱硬化性樹ffI2
2によって高温度中、例えば摂氏150度の下で封着さ
れる。
Next, the substrate A and the substrate B are bonded with a thermosetting adhesive or a sealant called ffI2 while maintaining an appropriate distance between them with the liquid crystal alignment films 3 and 4 inside.
2 at high temperature, for example below 150 degrees Celsius.

基板Bの熱膨張係数αBは、基板Aの熱膨張係数αAに
対して大きいので、この加熱時において生じる基板Aの
熱膨張分の他に、a−Siを成膜したときに発生してい
た当該基板Aの反り返りの分まで基板Bが吸収し、この
状態で上記熱硬化性樹脂22は固体化するので、冷却後
基板A及び基板Bは一体化されたままファイバープレー
ト11の外部当接面すなわちフェイスプレートは同図C
の如く平面に矯正される。
Since the thermal expansion coefficient αB of the substrate B is larger than the thermal expansion coefficient αA of the substrate A, in addition to the thermal expansion of the substrate A that occurs during this heating, there is also the thermal expansion coefficient αB that occurs when forming the a-Si film. The substrate B absorbs the warpage of the substrate A, and in this state, the thermosetting resin 22 solidifies, so that after cooling, the substrate A and the substrate B remain integrated and contact the external contact surface of the fiber plate 11. In other words, the face plate is C in the same figure.
It is corrected to a flat surface as shown below.

こうして作製された液晶用セルギャップCは、次に上記
スペーサ2及び液晶配向膜3及び4に囲まれた空のセル
内に、液晶が注入されて一つのLCLVができあがる。
In the liquid crystal cell gap C thus produced, liquid crystal is then injected into the empty cell surrounded by the spacer 2 and the liquid crystal alignment films 3 and 4, thereby completing one LCLV.

なお、本実施例においては、基板A及びBの熱膨張係数
を単に変数αA及びαBにて示したが、これら変数αA
及びαBの具体的な値はLCLVの各層の材質、厚さ等
のパラメータに基づいて、計算機が実行するシュミレー
ションによって定めることができる。
In this example, the thermal expansion coefficients of substrates A and B are simply expressed as variables αA and αB, but these variables αA
The specific values of αB and αB can be determined by a simulation executed by a computer based on parameters such as the material and thickness of each layer of the LCLV.

発明の詳細 な説明したように、本発明の光導電型液晶ライトバルブ
においては、書込み側を封止する透明基板の熱膨張係数
を読出し側を封止する透明基板より小さくしている故、
当該書込み側封止基板の外部当接面の湾曲が平坦な平面
に矯正される。よって、書込み側封止基板とCRT等の
書込み光源のフェイスプレートとが均一な間隙をもって
接合され、解像度の優れた投写映像が得られる。
As described in detail, in the photoconductive liquid crystal light valve of the present invention, the coefficient of thermal expansion of the transparent substrate sealing the write side is smaller than that of the transparent substrate sealing the read side.
The curvature of the external contact surface of the write-side sealing substrate is corrected to a flat surface. Therefore, the write-side sealing substrate and the face plate of a write light source such as a CRT are joined with a uniform gap, and a projected image with excellent resolution can be obtained.

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

第1図は光導電型液晶ライトバルブの構成例を示すブロ
ック図、第2図は投射型液晶デイスプレィの一例を示す
ブロック図、第3図は本発明実施例における光導電型液
晶ライトバルブの作製法を説明するための図である。 主要部分の符号の説明 1・・・液晶層 5・・・光導電膜 8.9・・・透明導電膜 10・・・ガラス基板 11・・・ファイバープレー 22・・・熱硬化性樹脂 ト
FIG. 1 is a block diagram showing a configuration example of a photoconductive liquid crystal light valve, FIG. 2 is a block diagram showing an example of a projection type liquid crystal display, and FIG. 3 is a fabrication of a photoconductive liquid crystal light valve in an embodiment of the present invention. FIG. Explanation of symbols of main parts 1...Liquid crystal layer 5...Photoconductive film 8.9...Transparent conductive film 10...Glass substrate 11...Fiber plate 22...Thermosetting resin plate

Claims (3)

【特許請求の範囲】[Claims] (1)積層される光導電層及び液晶層の外側に一対の透
明電極が配され、書込み側に配される第1の透明基板と
読出し側に配される第2の透明基板とによって封止され
た構成の光導電型液晶ライトバルブであって、前記第1
の透明基板は前記第2の透明基板よりも小なる熱膨張係
数を有することを特徴とする光導電型液晶ライトバルブ
(1) A pair of transparent electrodes are arranged on the outside of the laminated photoconductive layer and liquid crystal layer, and sealed by a first transparent substrate arranged on the writing side and a second transparent substrate arranged on the reading side. A photoconductive liquid crystal light valve having a configuration in which the first
A photoconductive liquid crystal light valve, wherein the transparent substrate has a coefficient of thermal expansion smaller than that of the second transparent substrate.
(2)前記第1の透明基板は前記第2の透明基板よりも
含有するアルカリ成分が少ないことを特徴とする特許請
求の範囲第1項記載の光導電型液晶ライトバルブ。
(2) The photoconductive liquid crystal light valve according to claim 1, wherein the first transparent substrate contains less alkali component than the second transparent substrate.
(3)前記第1の透明基板と前記第2の透明基板とは熱
硬化性樹脂によって封止せしめることを特徴とする特許
請求の範囲第1項記載の光導電型液晶ライトバルブ。
(3) The photoconductive liquid crystal light valve according to claim 1, wherein the first transparent substrate and the second transparent substrate are sealed with a thermosetting resin.
JP26816890A 1990-10-04 1990-10-04 Photoconduction type liquid crystal light valve Pending JPH04143733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26816890A JPH04143733A (en) 1990-10-04 1990-10-04 Photoconduction type liquid crystal light valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26816890A JPH04143733A (en) 1990-10-04 1990-10-04 Photoconduction type liquid crystal light valve

Publications (1)

Publication Number Publication Date
JPH04143733A true JPH04143733A (en) 1992-05-18

Family

ID=17454856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26816890A Pending JPH04143733A (en) 1990-10-04 1990-10-04 Photoconduction type liquid crystal light valve

Country Status (1)

Country Link
JP (1) JPH04143733A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6043858A (en) * 1993-05-18 2000-03-28 Sony Corporation Liquid crystal display device capable of improving pattern aligment
JP2004133109A (en) * 2002-10-09 2004-04-30 Seiko Epson Corp Method for manufacturing substrate having thin film formed thereon, method for manufacturing electrooptical device, electrooptical device, and electronic appliance
KR100495791B1 (en) * 1997-07-11 2005-09-20 삼성전자주식회사 Liquid crystal display without polluting with sealant and manufacturing method therefor
KR100710145B1 (en) * 2000-11-01 2007-04-20 엘지.필립스 엘시디 주식회사 Liquid crystal device and method for manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6043858A (en) * 1993-05-18 2000-03-28 Sony Corporation Liquid crystal display device capable of improving pattern aligment
KR100495791B1 (en) * 1997-07-11 2005-09-20 삼성전자주식회사 Liquid crystal display without polluting with sealant and manufacturing method therefor
KR100710145B1 (en) * 2000-11-01 2007-04-20 엘지.필립스 엘시디 주식회사 Liquid crystal device and method for manufacturing the same
JP2004133109A (en) * 2002-10-09 2004-04-30 Seiko Epson Corp Method for manufacturing substrate having thin film formed thereon, method for manufacturing electrooptical device, electrooptical device, and electronic appliance

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