JP2999208B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP2999208B2 JP2999208B2 JP1276326A JP27632689A JP2999208B2 JP 2999208 B2 JP2999208 B2 JP 2999208B2 JP 1276326 A JP1276326 A JP 1276326A JP 27632689 A JP27632689 A JP 27632689A JP 2999208 B2 JP2999208 B2 JP 2999208B2
- Authority
- JP
- Japan
- Prior art keywords
- glass substrate
- liquid crystal
- crystal display
- refractive index
- minute projections
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、液晶ディスプレイ、液晶シャッタアレイ、
液晶テレビ等に使用される液晶パネル光学系に関し、特
に液晶プロジェクタに好適な光学系に関する。The present invention relates to a liquid crystal display, a liquid crystal shutter array,
The present invention relates to a liquid crystal panel optical system used for a liquid crystal television and the like, and particularly to an optical system suitable for a liquid crystal projector.
［従来の技術］ 液晶テレビ等に使用されている液晶マトリクスアレイ
は、厚み数μｍ程度の液晶層を２枚のガラス基板で挟み
込み、これに電極、信号線、TFT等を成膜、パターンニ
ングして製作される。[Prior art] In a liquid crystal matrix array used in a liquid crystal television or the like, a liquid crystal layer having a thickness of about several μm is sandwiched between two glass substrates, and electrodes, signal lines, TFTs, and the like are formed and patterned. Produced.
一般的な構成は第２図に示されるようなものである。
図中1,2はガラス基板、３は液晶層、４は透明電極、５
は液晶窓、６は配線パターン、TFT等の不透光部分、７
は照明光である。The general configuration is as shown in FIG.
In the figure, 1 and 2 are glass substrates, 3 is a liquid crystal layer, 4 is a transparent electrode, 5
Is a liquid crystal window, 6 is a wiring pattern, an opaque portion such as a TFT, 7
Is illumination light.
各画素のスイッチングのためのTFTは、α−Si又はpol
y Siで作製されることが多く、このためガラス基板1,2
としては、無アルカリのもの、即ちα−Siに対しては例
えばコーニング社製ガラス＃7059、poly Siに対しては
石英ガラス等が使用されることが多い。TFT for switching each pixel is α-Si or pol
It is often made of ySi.
For example, a non-alkali material, that is, glass # 7059 manufactured by Corning Co., Ltd. for α-Si and quartz glass for poly Si are often used.
また、具体的な先行技術としては、特開昭61−208080
号公報、特開昭57−157215号公報及び特開昭50−23799
号公報が挙げられる。As a specific prior art, Japanese Patent Application Laid-Open No. 61-208080
JP, JP-A-57-157215 and JP-A-50-23799
Publication.
特開昭61−208080号公報には紫外線硬化型樹脂を用い
た液晶カラーイメージ表示装置が開示され、特開昭57−
157215号公報には光を集光するためのモザイクレンズシ
ートを用いたマトリックス表示装置が開示され、特開昭
50−23799号公報にはガラス板とレンズとの間に、蒸留
水等の低屈折誘電体を介在させた構成が開示されてい
る。JP-A-61-208080 discloses a liquid crystal color image display device using an ultraviolet curable resin.
No. 157215 discloses a matrix display device using a mosaic lens sheet for condensing light.
Japanese Patent Application Laid-Open No. 50-23799 discloses a configuration in which a low refractive dielectric such as distilled water is interposed between a glass plate and a lens.
［発明が解決しようとする課題］ 上述した何れの先行技術にあっても、レンズ群とこの
レンズ群に対向するガラス板とをどのように接着するか
は記載されていないが、一般的にはレンズ群を避けるよ
うにして周縁部を止着している。[Problems to be Solved by the Invention] In any of the above-described prior arts, how to bond a lens group and a glass plate facing the lens group is not described. The periphery is fastened so as to avoid the lens group.
尚、本願の出願後に出願公開された特願平１−74221
号（特開平２−251902号）には、レンズ群の上に樹脂層
を設けて平坦化し、この平坦化した面と対向するガラス
板とを接着剤で接着することが開示されている。In addition, Japanese Patent Application No. 1-74221 filed after the filing of the present application.
Japanese Patent Application Laid-Open No. 2-251902 discloses that a resin layer is provided on a lens group for flattening, and the flattened surface is bonded to an opposing glass plate with an adhesive.
［発明が解決しようとする課題］ レンズ群を形成したガラス板とこれと対向するガラス
板を重ね、周縁部のみを止着した場合には、中央部で膨
れてしまう。また樹脂層を設けて平坦化した後に接着す
れば、中央部が膨れる等の不具合はないが、接着層を設
けなければならず、この接着層の部分で屈折が生じ、光
学特性が劣化する不利がある。[Problem to be Solved by the Invention] When a glass plate on which a lens group is formed and a glass plate facing the glass plate are overlapped and only the peripheral portion is fixed, the central portion expands. In addition, if bonding is performed after the resin layer is provided and flattened, there is no problem such as swelling of the central portion, but the adhesive layer must be provided, and refraction occurs in this adhesive layer portion, deteriorating optical characteristics. There is.
［課題を解決するための手段］ 上記課題を解決すべく本発明は、液晶表示装置の液晶
窓に発光源からの光を集光して入射せしめるための構成
として、第１ガラス基板と、この第１ガラス基板に対向
するとともに対向面にレンズとして機能する多数の微小
凸部を形成した第２ガラス基板と、この第２ガラス基板
の微小凸部側面と第１ガラス基板表面との間に介在する
低屈折率媒質とを含んだ構成とし、特に、前記低屈折率
媒質を紫外線硬化型樹脂を硬化したものとし、この紫外
線硬化型樹脂にて第２ガラス基板の微小凸部と第１ガラ
ス基板とを接着せしめるようにした。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a first glass substrate having a first glass substrate as a configuration for condensing light from a light emitting source into a liquid crystal window of a liquid crystal display device. A second glass substrate formed with a large number of minute projections facing the first glass substrate and functioning as lenses on the opposite surface, and interposed between the minute projection side surface of the second glass substrate and the surface of the first glass substrate; In particular, the low refractive index medium is obtained by curing an ultraviolet curable resin, and the minute convex portion of the second glass substrate and the first glass substrate are made of the ultraviolet curable resin. Was made to adhere.
［実施例］ 以下に本発明を第１図に示した実施例に基づいて説明
する。Embodiment The present invention will be described below based on the embodiment shown in FIG.
第１図において、包括的に参照番号20で示す液晶表示
パネルの部分は、第２図の従来構造と同じであってよ
い。In FIG. 1, the portion of the liquid crystal display panel indicated generally by reference numeral 20 may be the same as the conventional structure in FIG.
本発明では、従来液晶表示パネル20を構成する一対の
ガラス基板1,2のうち照明光源30側に位置する基板１
（第１ガラス基板）の外側面に密接して、第２ガラス基
板８を固定配置する。この第２ガラス基板８の、第１ガ
ラス基板１に対向する側の面上には、略球面形状の多数
個の微小凸部９が形成されている。In the present invention, the substrate 1 located on the side of the illumination light source 30 out of the pair of glass substrates 1
The second glass substrate 8 is fixedly arranged in close contact with the outer surface of the (first glass substrate). On the surface of the second glass substrate 8 on the side facing the first glass substrate 1, a plurality of minute convex portions 9 having a substantially spherical shape are formed.
このような微小凸部９を備えた第２ガラス基板８は、
各微小凸部９の位置が各液晶窓５の位置に対向するよう
にして、低屈折率媒質10を介して、第１ガラス基板１に
密接固定されている。The second glass substrate 8 provided with such minute projections 9 is
The minute projections 9 are closely fixed to the first glass substrate 1 via the low-refractive index medium 10 so that the positions of the minute projections 9 face the positions of the liquid crystal windows 5.
低屈折率媒質10としては紫外線硬化型樹脂材料を選択
する。これにより第１ガラス基板１と、微小凸部９を備
えた第２ガラス基板８との接着が行われる。As the low refractive index medium 10, an ultraviolet curable resin material is selected. Thereby, the first glass substrate 1 is bonded to the second glass substrate 8 having the minute projections 9.
接着は、未硬化の紫外線硬化型樹脂材料を第１ガラス
基板１と第２ガラス基板８との間に充填し、外側から紫
外線を照射し硬化せしめる。The bonding is performed by filling an uncured ultraviolet-curable resin material between the first glass substrate 1 and the second glass substrate 8 and irradiating ultraviolet rays from the outside to cure the resin.
この場合、第２ガラス基板８の接合面には微小凸部９
が形成されているが、第１ガラス基板１については予め
液晶パネル20を構成していても、或いは未だ液晶パネル
となっていない状態、つまりガラス板単独でもよい。In this case, the minute projections 9 are formed on the bonding surface of the second glass substrate 8.
However, the first glass substrate 1 may be configured with the liquid crystal panel 20 in advance, or may be in a state where the liquid crystal panel is not yet formed, that is, the glass plate alone.
上記構造の液晶表示装置において、光源30から出た照
明光７は、各微小凸部９で屈折して各凸部に対向する各
液晶窓５に集光入射し透過する。この結果、これまで、
液晶パネル20の配線パターニング、TFT部等の不透光部
６によって遮光されていた照明光も液晶窓５を通して後
方に伝達することができ、照明の利用効率の高い、明る
い液晶表示装置を実現できる。In the liquid crystal display device having the above-mentioned structure, the illumination light 7 emitted from the light source 30 is refracted by each minute convex portion 9, condensed and incident on each liquid crystal window 5 facing each convex portion, and is transmitted. As a result,
The patterning of the wiring of the liquid crystal panel 20 and the illuminating light blocked by the light opaque part 6 such as a TFT part can also be transmitted to the rear through the liquid crystal window 5, so that a bright liquid crystal display device with high illumination use efficiency can be realized. .
ここで、各微小凸部９が曲率半径Ｒなる球面形状を持
ち、屈折率n1なる材料で作製され、また低屈折率媒質10
の屈折率がn2であるとする。さらに第１ガラス基板１の
厚みをｔ、屈折率をn3とする。この時微小凸部９が曲率
半径Ｒを、 Ｒ＝（n2−n1）t/n3 のごとく設定すれば、微小凸部９は、液晶窓５の存在す
る面を焦点面とする凸レンズとして作用し、上記のよう
な照明光の伝達効率の向上が実現できる。Here, each minute projection 9 has a spherical shape with a radius of curvature R, is made of a material having a refractive index n1, and has a low refractive index medium 10
Is n2. Further, the thickness of the first glass substrate 1 is t and the refractive index is n3. At this time, if the minute convex portion 9 sets the radius of curvature R as R = (n2-n1) t / n3, the minute convex portion 9 acts as a convex lens having the surface where the liquid crystal window 5 exists as the focal plane. Thus, it is possible to improve the transmission efficiency of the illumination light as described above.
なお、低屈折率媒質10、透明電極４、液晶層３の各厚
みは極めて小さいため無視できる。The thicknesses of the low refractive index medium 10, the transparent electrode 4, and the liquid crystal layer 3 are extremely small and can be ignored.
［発明の効果］ 本発明によれば、ガラス基板の微小凸部を形成した面
と他のガラス基板とを、紫外線効果型の樹脂で全面接着
するため、中間部が膨れたり凹んだりすることがなく、
しかも別途接着層を設けないため、材料費用の低減が図
れるだけでなく、接着層の部分で屈折が起きる等の不具
合も発生しない。[Effects of the Invention] According to the present invention, since the entire surface of the glass substrate on which the minute projections are formed and the other glass substrate are bonded with an ultraviolet effect type resin, the intermediate portion may be swollen or dented. Not
In addition, since no separate adhesive layer is provided, not only the material cost can be reduced, but also problems such as refraction at the adhesive layer do not occur.
第１図は本発明の一実施例を示す断面図、第２図は従来
の液晶表示パネルを示す断面図である。 1,2……液晶パネルガラス基板 ４……透明電極 ５……液晶窓 ６……不透光部 ７……照明光 ８……第２ガラス基板 ９……集光用微小凸部 10……低屈折率媒質 20……液晶表示パネル 30……照明光源FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional liquid crystal display panel. 1,2 ... Liquid crystal panel glass substrate 4 ... Transparent electrode 5 ... Liquid crystal window 6 ... Impermeable part 7 ... Illumination light 8 ... Second glass substrate 9 ... Condensation convex part 10 ... Low refractive index medium 20 ... LCD panel 30 ... Illumination light source
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−208080（ＪＰ，Ａ) 特開 昭57−157215（ＪＰ，Ａ) 特開 平２−251902（ＪＰ，Ａ) 特開 平２−244123（ＪＰ，Ａ) 実開 昭50−23799（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/1335 G02B 3/00 G09F 9/00 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-61-208080 (JP, A) JP-A-57-157215 (JP, A) JP-A-2-251902 (JP, A) JP-A-2- 244123 (JP, A) Japanese Utility Model Showa 50-23799 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G02F 1/1335 G02B 3/00 G09F 9/00
Claims (1)
対向するとともに対向面にレンズとして機能する多数の
微小凸部を形成した第２ガラス基板と、この第２ガラス
基板の微小凸部側面と第１ガラス基板表面との間に介在
する低屈折率媒質とを含んだ液晶表示装置であって、前
記低屈折率媒質は紫外線硬化型樹脂を硬化したもので第
２ガラス基板のレンズとして機能する多数の微小凸部と
第１ガラス基板とを接着していることを特徴とする液晶
表示装置。1. A first glass substrate, a second glass substrate having a large number of minute projections facing the first glass substrate and functioning as lenses on the facing surface, and minute projections of the second glass substrate. What is claimed is: 1. A liquid crystal display device comprising a low refractive index medium interposed between a side surface and a surface of a first glass substrate, wherein the low refractive index medium is obtained by curing an ultraviolet curable resin and serves as a lens of a second glass substrate. A liquid crystal display device wherein a number of functional minute projections are bonded to a first glass substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1276326A JP2999208B2 (en) | 1989-10-24 | 1989-10-24 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1276326A JP2999208B2 (en) | 1989-10-24 | 1989-10-24 | Liquid crystal display |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11034720A Division JPH11316370A (en) | 1999-02-12 | 1999-02-12 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03137617A JPH03137617A (en) | 1991-06-12 |
| JP2999208B2 true JP2999208B2 (en) | 2000-01-17 |
Family
ID=17567892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1276326A Expired - Fee Related JP2999208B2 (en) | 1989-10-24 | 1989-10-24 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2999208B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03233417A (en) * | 1989-10-30 | 1991-10-17 | Sharp Corp | Optical device |
| JP3824425B2 (en) * | 1998-06-17 | 2006-09-20 | 日本板硝子株式会社 | Flat micro lens array |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02251902A (en) * | 1989-03-27 | 1990-10-09 | Seiko Epson Corp | Lens array and liquid crystal display element formed by using lens array |
-
1989
- 1989-10-24 JP JP1276326A patent/JP2999208B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03137617A (en) | 1991-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |