JPH04168424A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH04168424A JPH04168424A JP2295990A JP29599090A JPH04168424A JP H04168424 A JPH04168424 A JP H04168424A JP 2295990 A JP2295990 A JP 2295990A JP 29599090 A JP29599090 A JP 29599090A JP H04168424 A JPH04168424 A JP H04168424A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display element
- light
- crystal display
- lens array
- 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 56
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000005693 optoelectronics Effects 0.000 claims 1
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005530 etching Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液晶デイスプレィ、投射型プロジェクタ−１
光プリンター等の光学機器に使用される液晶表示素子に
関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid crystal display, a projection type projector-1
The present invention relates to liquid crystal display elements used in optical equipment such as optical printers.
高分解能液晶表示素子の解決すべき課題に表示面におけ
る明るさ及びコントラストの改善があげられる。上記課
題に対し、液晶表示素子にレンズアレイ体を形成し、入
射光を液晶画素開口部に集めることにより、明るさ及び
コントラストの改善を図るという提案がなされてきた。Problems to be solved with high-resolution liquid crystal display elements include improving the brightness and contrast on the display surface. To address the above-mentioned problems, proposals have been made to improve brightness and contrast by forming a lens array in a liquid crystal display element and concentrating incident light on the liquid crystal pixel aperture.
（例えば特開昭５７−１５７２１５、特開昭６０−１
６５６２４゜）以下に、従来の提案の概要を第２図を用
いて説明する。マイクロレンズ板２０４上に形成された
マイクロレンズ２０３と、透明基板２０９上に形成され
た液晶画素開口部２０８が対応するように両者を構成し
、該マイクロレンズにより入射光２０１を液晶画素開口
部２０８に局所的に集光し、なおかつその部分を透過さ
せ、遮光性部分く遮光膜２０５、能動スイッチング素子
２０７）で光が遮られることによる透過損失を減少させ
、明るい液晶表示素子を得ようとするものである。(For example, JP-A-57-157215, JP-A-60-1
65624°) Below, an outline of the conventional proposal will be explained using FIG. The microlenses 203 formed on the microlens plate 204 and the liquid crystal pixel apertures 208 formed on the transparent substrate 209 are configured to correspond to each other, and the microlenses direct the incident light 201 to the liquid crystal pixel apertures 208. The objective is to locally condense light into the area and transmit it through that part, thereby reducing the transmission loss caused by the light being blocked by the light-blocking portion (light-blocking film 205, active switching element 207), and obtaining a bright liquid crystal display element. It is something.
一般にマイクロレンズとしては円形レンズまたはレンチ
キュラーレンズが用いられる。又、透明基板２０９上に
形成されている信号線及び能動スイッチング素子２０７
を強い入射光から保護するために、通常対向基板には金
属薄膜等による遮光膜２０５が形成されている。Generally, a circular lens or a lenticular lens is used as the microlens. In addition, signal lines and active switching elements 207 formed on the transparent substrate 209
In order to protect the light from strong incident light, a light shielding film 205 made of a metal thin film or the like is usually formed on the opposing substrate.
しかし、従来−技術に見られる提案は光源を含めた一連
の光学系の特性をほとんど考慮していないため、いずれ
も効果的であるとは言い難い。なぜならば、通常レンズ
アレイの形成しである基板の厚さは１ｍｍ程度あるため
、仮に表示画素の大きさが１００μｍＸ１００μｍ程度
とするとＦナンバーが６〜８程度の焦点距離の長いレン
ズ体を形成することになる。焦点距離の長いレンズ体、
つまり開口数（ＮＡ値）が小さいレンズ体は視野角が小
さく、レンズの光軸に対して比較的大きな角度を持って
入射する光はほとんど集光することができない。However, since the proposals found in the prior art hardly take into account the characteristics of a series of optical systems including the light source, it is difficult to say that any of them are effective. This is because the thickness of the substrate on which the lens array is normally formed is about 1 mm, so if the size of the display pixel were about 100 μm x 100 μm, a lens body with a long focal length with an F number of about 6 to 8 would be formed. become. long focal length lens body,
In other words, a lens body with a small numerical aperture (NA value) has a small viewing angle, and almost no light that enters at a relatively large angle with respect to the optical axis of the lens can be focused.
このことを第２図を用いて説明する。マイクロレンズ板
２０４に対してほぼ垂直に入射する入射光２０１は、は
ぼ完全に液晶画素表示部２０８を透過するが、マイクロ
レンズ板２０４に対して入射角度θで入射する斜入射光
２０２の大半は、遮光膜２０５で遮られてしまう。This will be explained using FIG. 2. The incident light 201 that is almost perpendicularly incident on the microlens plate 204 is almost completely transmitted through the liquid crystal pixel display section 208, but most of the obliquely incident light 202 that is incident on the microlens plate 204 at an incident angle θ. is blocked by the light shielding film 205.
レーザー光源を除いて、一般の白色光源からの出射光束
は３〜１０’程度の極めて大きな広がり角を有すること
７．液晶表示素子の高密度化に伴い益々表示画素が小さ
くなることを考えると、従来の構造では、十分な集光効
果を期待できないという問題がある。7. Excluding laser light sources, the emitted light beam from a general white light source has an extremely large spread angle of about 3 to 10'. Considering that display pixels are becoming smaller and smaller as the density of liquid crystal display elements increases, there is a problem in that a sufficient light condensing effect cannot be expected with conventional structures.
そこで本発明は以上のような問題点を解決するもので、
その目的とするところは、出射光束の平行性が悪い光源
を用いた場合でも光利用効率の高い明るい液晶表示素子
を提供することにある。Therefore, the present invention solves the above problems.
The purpose is to provide a bright liquid crystal display element with high light utilization efficiency even when a light source with poor collimation of the emitted light beam is used.
上記課題を解決するために本発明の液晶表示素子は、一
対の基板間に液晶を保持し前記基板上に液晶の電気光学
効果を制御する手段として、一方の基板上に能動スイッ
チング素子をマトリックス状に形成した液晶表示素子に
おいて、該基板に対向する基板上に液晶画素に対応して
形成された集光機能を有するレンズアレーと、前記レン
ズアレーによって液晶画素以外の部分に導かれる光を液
晶画素部分に導く反射層を有することを特徴とする。In order to solve the above problems, the liquid crystal display element of the present invention holds a liquid crystal between a pair of substrates, and has active switching elements arranged in a matrix on one substrate as a means for controlling the electro-optic effect of the liquid crystal on the substrate. In the liquid crystal display element formed in the above-described method, a lens array having a light collecting function is formed on a substrate facing the substrate in correspondence with the liquid crystal pixels, and the light guided by the lens array to a portion other than the liquid crystal pixels is directed to the liquid crystal pixels. It is characterized by having a reflective layer that guides the user to the area.
本発明の作用を図に沿って説明する。第１図は、本発明
の液晶表示素子の作用を説明する概念図である。この液
晶表示素子の基本的な構造は、従来のものとほぼ同じで
あるが、マイクロレンズ板１０４の内部に反射層１０９
を設けである。The operation of the present invention will be explained with reference to the drawings. FIG. 1 is a conceptual diagram illustrating the operation of the liquid crystal display element of the present invention. The basic structure of this liquid crystal display element is almost the same as the conventional one, but there is a reflective layer 109 inside the microlens plate 104.
This is provided.
このような構造にすることにより、斜入射光１０２０本
来ならば遮光部分で遮られてしまう光線も、反射層１０
９で反射されることにより、液晶画素表示部を透過する
ことができ、出射光束の平行性が悪い光源を用し＼ても
集光性能の高いレンズアレイを備えた、明るい液晶表示
素子を提供することができる。なお、反射層１０９の形
状は、上記概念を満足するものであればどの様な形状で
あっても構わないことは言うまでもない。ただし、この
形状は、液晶表示素子の出射光の出射角度を決定するも
のであり、投射型プロジェクタ−で使用する場合は、投
射レンズのＦ値を考慮して、設計する必要がある。また
どのような用途においても、光源出射光束の出射角度を
考慮にいれて設計されるべきである。By adopting such a structure, the obliquely incident light 1020, which would otherwise be blocked by the light blocking portion, is transferred to the reflective layer 10.
9, it can pass through the liquid crystal pixel display section, and provides a bright liquid crystal display element equipped with a lens array that has high light collection performance even when using a light source with poor collimation of the emitted light beam. can do. It goes without saying that the shape of the reflective layer 109 may be any shape as long as it satisfies the above concept. However, this shape determines the output angle of the output light of the liquid crystal display element, and when used in a projection type projector, it is necessary to take into consideration the F value of the projection lens when designing. In addition, in any application, the output angle of the light beam emitted from the light source should be taken into consideration when designing.
［実施例−１］ 第１図にその断面構造を示す液晶表示素子を作製した。[Example-1] A liquid crystal display element whose cross-sectional structure is shown in FIG. 1 was manufactured.
マイクロレンズ板を位置選択的にエツチングすることに
より、反射層１０９形状を有する穴を作製し、そこにア
ルミを蒸着した後、穴を樹脂で埋めることにより、反射
層１０９を作製した。By position-selectively etching the microlens plate, a hole having the shape of the reflective layer 109 was created, aluminum was deposited there, and then the hole was filled with resin to create the reflective layer 109.
マイクロレンズ１０３は、樹脂の熱流動を利用して作製
した。得られた液晶表示素子で、１０°以下の入射角で
入射する入射光をほぼ１００％液晶画素表示部１０８を
透過させることが出来た。この液晶表示素子をライトバ
ルブとして用い、液晶プロジェクタ−を作製したところ
、従来の反射部を有しないマイクロレンズ付液晶表示素
子を用いた場合に比べて、１．８倍の出射光束を得るこ
とが出来た。The microlens 103 was manufactured using thermal flow of resin. In the obtained liquid crystal display element, almost 100% of the incident light incident at an incident angle of 10 degrees or less was able to be transmitted through the liquid crystal pixel display section 108. When we created a liquid crystal projector using this liquid crystal display element as a light valve, we were able to obtain 1.8 times the output luminous flux compared to the case of using a conventional liquid crystal display element with a microlens that does not have a reflective part. done.
［実施例−２コ
実施例−１と同様の作製法を用いて液晶表示素子を作製
し、それをビデオカメラ用ビューファインダーとして使
用したところ、従来のものに比べて１．７倍の明るさを
得ることができた。同様の効果は、ラップトツブパソコ
ン等に用いられる液晶デイスプレィにおいても確認され
た。[Example 2] A liquid crystal display element was manufactured using the same manufacturing method as in Example 1, and when used as a viewfinder for a video camera, the brightness was 1.7 times that of the conventional one. was able to obtain. A similar effect was also confirmed in liquid crystal displays used in laptop computers and the like.
Ｕ発明の効果コ
以上説明したように、本発明の液晶表示素子は、マイク
ロレンズを備えた液晶表示素子において、マイクロレン
ズ板に反射部を設けるという極めて簡素な構成により、
出射光束の平行性が悪い光源を用いても集光性能の高い
、レンズアレイを備えた、明るい液晶表示素子を提供す
ることが可能である。本発明の液晶表示素子は上記の特
性を生かして、液晶を用いる各種表示体、光学機器など
の広範囲の応用が可能である。U Effects of the Invention As explained above, the liquid crystal display element of the present invention is a liquid crystal display element equipped with a microlens, and has the extremely simple structure of providing a reflective section on the microlens plate.
It is possible to provide a bright liquid crystal display element equipped with a lens array that has high light collection performance even when using a light source whose emitted light beam has poor parallelism. By taking advantage of the above characteristics, the liquid crystal display element of the present invention can be widely applied to various displays and optical devices using liquid crystals.
第１図は本発明の液晶表示素子の作用を説明するための
構成断面図。第２図は、従来の液晶表示素子の作用を説
明するための構成断面図。
１０１・・・入射光
１０２・・・斜入射光
１０３・・・マイクロレンズ
１０４・・・マイクロレンズ板
１０５・・・遮光膜
１０６・・・液晶層
１０７・・・能動スイッチング素子
１０８・・・液晶画素表示部
１０９・・・反射層
１１０・・・透明基板
２０１・・・入射光
２０２・・・斜入射光
２０３・・・マイクロレンズ
２０４・・・マイクロレンズ板
２０５・・・遮光膜
２０６・・・液晶層
２０７・・・能動スイッチング素子
２０８・・・液晶画素表示部
２０９・・・透明基板
以上FIG. 1 is a cross-sectional view of the structure of the liquid crystal display element according to the present invention. FIG. 2 is a cross-sectional view of the structure of a conventional liquid crystal display element for explaining its operation. 101... Incident light 102... Oblique incident light 103... Micro lens 104... Micro lens plate 105... Light shielding film 106... Liquid crystal layer 107... Active switching element 108... Liquid crystal Pixel display section 109...reflection layer 110...transparent substrate 201...incident light 202...oblique incident light 203...microlens 204...microlens plate 205...light shielding film 206... -Liquid crystal layer 207...active switching element 208...liquid crystal pixel display section 209...transparent substrate or higher
Claims (1)
学効果を制御する手段として、一方の基板上に能動スイ
ッチング素子をマトリックス状に形成した液晶表示素子
において、該基板に対向する基板上に液晶画素に対応し
て形成された集光機能を有するレンズアレーと、前記レ
ンズアレーによって液晶画素以外の部分に導かれる光を
液晶画素部分に導く反射層を有することを特徴とする液
晶表示素子。In a liquid crystal display element in which a liquid crystal is held between a pair of substrates and active switching elements are formed in a matrix on one substrate as a means for controlling the electro-optical effect of the liquid crystal on the substrate, a substrate opposite to the substrate is A liquid crystal display element comprising: a lens array having a light collecting function formed corresponding to a liquid crystal pixel; and a reflective layer that guides light guided to a part other than the liquid crystal pixel by the lens array to the liquid crystal pixel part. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2295990A JPH04168424A (en) | 1990-11-01 | 1990-11-01 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2295990A JPH04168424A (en) | 1990-11-01 | 1990-11-01 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04168424A true JPH04168424A (en) | 1992-06-16 |
Family
ID=17827711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2295990A Pending JPH04168424A (en) | 1990-11-01 | 1990-11-01 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04168424A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0609055A1 (en) * | 1993-01-25 | 1994-08-03 | Matsushita Electric Industrial Co., Ltd. | Light valve apparatus and display system using same |
| US5541751A (en) * | 1992-12-11 | 1996-07-30 | Sharp Kabushiki Kaisha | Light scan type display device having light waveguides and photo conductive switching elements |
| JP2009258298A (en) * | 2008-04-15 | 2009-11-05 | Sony Corp | Lens array sheet, light source and liquid crystal display device |
-
1990
- 1990-11-01 JP JP2295990A patent/JPH04168424A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5541751A (en) * | 1992-12-11 | 1996-07-30 | Sharp Kabushiki Kaisha | Light scan type display device having light waveguides and photo conductive switching elements |
| EP0609055A1 (en) * | 1993-01-25 | 1994-08-03 | Matsushita Electric Industrial Co., Ltd. | Light valve apparatus and display system using same |
| US5430562A (en) * | 1993-01-25 | 1995-07-04 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal light valve including between light and light valve microlenses and two reflecting layers with a matrix of openings |
| JP2009258298A (en) * | 2008-04-15 | 2009-11-05 | Sony Corp | Lens array sheet, light source and liquid crystal display device |
| JP4518179B2 (en) * | 2008-04-15 | 2010-08-04 | ソニー株式会社 | Lens array sheet, optical member, light source, and liquid crystal display device |
| US8390763B2 (en) | 2008-04-15 | 2013-03-05 | Sony Corporation | Lens array sheet, light source and liquid crystal display device |
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