JPH02304527A - Liquid crystal display device for overhead projector and production of curved surface panel - Google Patents

Liquid crystal display device for overhead projector and production of curved surface panel

Info

Publication number
JPH02304527A
JPH02304527A JP12582289A JP12582289A JPH02304527A JP H02304527 A JPH02304527 A JP H02304527A JP 12582289 A JP12582289 A JP 12582289A JP 12582289 A JP12582289 A JP 12582289A JP H02304527 A JPH02304527 A JP H02304527A
Authority
JP
Japan
Prior art keywords
liquid crystal
display device
curved surface
thermal expansion
screen
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
JP12582289A
Other languages
Japanese (ja)
Inventor
Chiyoaki Iijima
千代明 飯島
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP12582289A priority Critical patent/JPH02304527A/en
Publication of JPH02304527A publication Critical patent/JPH02304527A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

PURPOSE:To prevent the uneveness of contrast between upper and lower parts of the picture on a screen by sticking substrates different in the coefficient of thermal expansion to each other by thermal press-fitting to form a curved surface panel. CONSTITUTION:A soda glass plate which has 90X10<-7>/ deg.C thermal expansion coefficient and 0.7mm thickness is used as an upper electrode substrate 2, and a borosilicate glass plate which has 46X10<-7>/ deg.C thermal expansion coefficient and 0.3mm thickness is used as a lower electrode substrate 2. These two glass substrates 2 an 3 are adhered to each other with thermo-setting adhesive 5 and adhered to each other by thermal press-fitting to obtain a curved surface panel where the layer thickness of liquid crystal is uniform. In this case, the picture is always perpendicularly seen from a certain point above a liquid crystal panel 1. Thus, the uneveness of contrast in the upper part of the picture on the screen is prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野1 本発明は、オーバーヘッドプロジェクタ−(以下OHP
という)用液晶表示装置に関する。また1本発明は曲面
パネルの製造方法に関する。しかし、本発明により製造
された曲面パネルは、OHP用液用液不表示装置み用い
られるばかりでなく、ミラー用等の光学素子としても用
いることができる。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an overhead projector (hereinafter referred to as OHP).
related to liquid crystal display devices. Another aspect of the present invention relates to a method for manufacturing a curved panel. However, the curved panel manufactured according to the present invention can be used not only as an OHP liquid non-display device, but also as an optical element for a mirror or the like.

〔従来の技術J 従来、対向して配置された一対の電極基板間に液晶層を
挟持してなるOHP用液用液不表示装置面な画面であっ
た。また、熱膨張率の等しい2枚の電極基板を貼り合せ
て一対の電極基板としていた。
[Prior Art J] Conventionally, the screen has been a liquid non-display device for OHP, which is formed by sandwiching a liquid crystal layer between a pair of electrode substrates disposed facing each other. Further, two electrode substrates having the same coefficient of thermal expansion were bonded together to form a pair of electrode substrates.

〔発明が解決しようとする課題] 従来の液晶表示装置における視角方向を変えた時の印加
電圧に対する透過率の変化を第2図に示す、θは液晶表
示装置の画面に対して鉛直方向からの視角を示す、同図
より明らかなように視角により透過率が異なる。このた
めOHP用液用液不表示装置て用いると、スクリーン画
面の上下によりコントラストむらが発生する。つまりO
HPの構造は第3図に示すようであり、表示画面の幅が
240mmであるときには、視角が±15度位となり、
スクリーンの画面の下方が暗くなる。第3図で、130
は光源、131はミラー、132はスクリーンを示す。
[Problems to be Solved by the Invention] Figure 2 shows the change in transmittance with respect to the applied voltage when the viewing angle direction is changed in a conventional liquid crystal display device. As is clear from the figure, which shows the viewing angle, the transmittance varies depending on the viewing angle. Therefore, when used in an OHP liquid non-display device, contrast unevenness occurs between the top and bottom of the screen. In other words, O
The structure of the HP is shown in Figure 3, and when the width of the display screen is 240 mm, the viewing angle is about ±15 degrees,
The bottom of the screen becomes dark. In Figure 3, 130
131 is a light source, 131 is a mirror, and 132 is a screen.

このように、従来のOHP用液用液不表示装置スクリー
ン画面の上下によりコントラストが異なるという問題点
があった。
As described above, there is a problem in that the contrast of the conventional OHP liquid non-display device differs depending on the top and bottom of the screen.

本発明は上記の問題点に鑑みてなされたものであり、ス
クリーン画面の上下によりコントラスト差が生じない液
晶表示装置を提供することを目的とする。
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a liquid crystal display device in which contrast difference does not occur between the top and bottom of the screen.

また、第2の目的は本発明は上記目的を達成するための
液晶表示装置の製造方法を提供することにある。
A second object of the present invention is to provide a method for manufacturing a liquid crystal display device for achieving the above object.

[課題を解決するための手段1 上記目的を達成するために、本発明のOHP用液晶装置
は以下のように構成されたものである。
[Means for Solving the Problems 1] In order to achieve the above object, the OHP liquid crystal device of the present invention is constructed as follows.

即ち、対向して配置された一対の電極基板間に液晶層を
挟持してなるOHP用液用液不表示装置いて、前記一対
の電極基板が曲面であることを特徴とする。
That is, there is a non-liquid display device for OHP in which a liquid crystal layer is sandwiched between a pair of electrode substrates arranged facing each other, and the electrode substrates are characterized in that the pair of electrode substrates have curved surfaces.

また本発明の曲面パネルの製造方法は以下のようである
。。即ち、一対の基板の対向して配置する曲面パネルの
製造方法において、熱膨張率の異なる2枚の基板を、熱
硬化型接着剤により、熱圧着して貼り合せることを特徴
とする。
Further, the method for manufacturing the curved panel of the present invention is as follows. . That is, a method for manufacturing a curved panel in which a pair of substrates are arranged facing each other is characterized in that two substrates having different coefficients of thermal expansion are bonded together by thermocompression using a thermosetting adhesive.

[作 用] 本発明のOHP用液用液不表示装置造を第1図に示す。[Work] FIG. 1 shows the construction of an OHP liquid non-display device according to the present invention.

lは液晶パネルであり1曲面状態になっている。液晶パ
ネル1は、上電極基板2と下電極基板3により液晶4を
挟み込み、シール剤(熱硬化型接着剤)5により封止さ
れている。液晶セルlに偏光板、光学異方体等を配設し
てもよい。すると液晶パネル上方のある点より画面をつ
ねに鉛直に見ることが出来る。したがってOHP用の液
晶表示装置として用いれば、スクリーンの画面の上下の
コントラストむらを防ぐことが出来る。
1 is a liquid crystal panel and has a single curved surface. The liquid crystal panel 1 has a liquid crystal 4 sandwiched between an upper electrode substrate 2 and a lower electrode substrate 3, and is sealed with a sealant (thermosetting adhesive) 5. A polarizing plate, an optically anisotropic body, etc. may be provided in the liquid crystal cell l. This allows you to always view the screen vertically from a certain point above the LCD panel. Therefore, when used as an OHP liquid crystal display device, uneven contrast between the top and bottom of the screen can be prevented.

〔実 施 例J 実施例1 第1図において、上電極基板2にソーダガラス0.7m
m厚、下電極基板3にホウケイ酸ガラス(コーニング7
059、コーニング社製)03mm厚を用いた。ソーダ
ガラスの熱膨張係数は90 X 10−’/”C、コー
ニング7059の熱膨張係数は46 X I O−’/
’Cである。上記2枚のガラス基板を貼り合せ160°
Cで熱圧着して接着した。
[Example J Example 1 In Fig. 1, 0.7 m of soda glass was used on the upper electrode substrate 2.
m thickness, lower electrode substrate 3 is made of borosilicate glass (Corning 7
059 (manufactured by Corning Inc.) with a thickness of 03 mm. The coefficient of thermal expansion of soda glass is 90 X 10-'/"C, and the coefficient of thermal expansion of Corning 7059 is 46 X I O-'/"
'C. Paste the above two glass substrates together at 160°
It was bonded by thermocompression using C.

すると液晶の層厚のむらがない均一な曲面パネルが得ら
れた。そこで曲率半径を測定すると室温で1621mm
となった。
As a result, a curved panel with a uniform liquid crystal layer thickness was obtained. Therefore, the radius of curvature was measured to be 1621 mm at room temperature.
It became.

次にOHP用表示装置として用いると上下のむらのない
スクリーン画面が得られた。
Next, when used as an OHP display device, a screen with no vertical unevenness was obtained.

実施例2 実施例1と同様にして、上電極基板2にソーダガラス0
.7mm厚、下電極基板3にコーニング7059 0.
7mm厚を用い、180℃で熱圧着して接着した。する
と室温で曲率半径が1786mmとなった。OHP用表
示装置として用いると実施例1に比べ上下のむらは改善
された。
Example 2 In the same manner as in Example 1, soda glass 0 was applied to the upper electrode substrate 2.
.. 7mm thick, lower electrode substrate 3 is Corning 7059 0.
Using a thickness of 7 mm, the adhesive was bonded by thermocompression at 180°C. The radius of curvature was then 1786 mm at room temperature. When used as an OHP display device, vertical unevenness was improved compared to Example 1.

実施例3 実施例3と同様の基板を用い、200°Cで熱圧着して
接着した。すると室温で曲率半径が1988mmとなっ
た。
Example 3 The same substrate as in Example 3 was used and bonded by thermocompression at 200°C. The radius of curvature was then 1988 mm at room temperature.

[発明の効果〕 以上説明したように、本発明によれば、熱膨張率の異な
る基板を熱圧着して貼り合せると、曲面パネルが出来、
この曲面パネルをOHP用液用液不表示装置て用いれば
、スクリーン画面の上下でむらのない表示が得られる。
[Effects of the Invention] As explained above, according to the present invention, when substrates having different coefficients of thermal expansion are bonded together by thermocompression bonding, a curved panel is created.
If this curved panel is used in an OHP liquid non-display device, an even display can be obtained at the top and bottom of the screen.

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

第1図は、本発明のOHP用液用液不表示装置造の略図
。 第2図は、従来のOHP用液用液不表示装置角方向を変
えた時の印加電圧に対する透過率の変化を示す図。 第3図は、0f−IPI71構造を示す略図。 以上 第1 ! 第20
FIG. 1 is a schematic diagram of a liquid non-display device for OHP according to the present invention. FIG. 2 is a diagram showing changes in transmittance with respect to applied voltage when the angular direction of a conventional OHP liquid non-display device is changed. FIG. 3 is a schematic diagram showing the Of-IPI71 structure. That’s all for number one! 20th

Claims (2)

【特許請求の範囲】[Claims] (1)対向して配置された一対の電極基板間に液晶層を
挟持してなるオーバーヘッドプロジェクタ−用液晶表示
装置において、前記一対の電極基板が曲面であることを
特徴とするオーバーヘッドプロジェクタ−用液晶表示装
置。
(1) A liquid crystal display device for an overhead projector comprising a liquid crystal layer sandwiched between a pair of electrode substrates disposed facing each other, wherein the pair of electrode substrates have a curved surface. Display device.
(2)一対の基板を対向して配置する曲面パネルの製造
方法において、熱膨張率の異なる2枚の基板を、熱硬化
型接着剤により熱圧着して貼り合せることを特徴とする
曲面パネルの製造方法。
(2) A method for manufacturing a curved panel in which a pair of substrates are arranged facing each other, which is characterized in that two substrates having different coefficients of thermal expansion are bonded together by thermocompression using a thermosetting adhesive. Production method.
JP12582289A 1989-05-19 1989-05-19 Liquid crystal display device for overhead projector and production of curved surface panel Pending JPH02304527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12582289A JPH02304527A (en) 1989-05-19 1989-05-19 Liquid crystal display device for overhead projector and production of curved surface panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12582289A JPH02304527A (en) 1989-05-19 1989-05-19 Liquid crystal display device for overhead projector and production of curved surface panel

Publications (1)

Publication Number Publication Date
JPH02304527A true JPH02304527A (en) 1990-12-18

Family

ID=14919798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12582289A Pending JPH02304527A (en) 1989-05-19 1989-05-19 Liquid crystal display device for overhead projector and production of curved surface panel

Country Status (1)

Country Link
JP (1) JPH02304527A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001033753A (en) * 1999-06-11 2001-02-09 Samsung Electronics Co Ltd Liquid crystal projection system
KR100315373B1 (en) * 1993-05-18 2002-12-12 소니 가부시끼 가이샤 LCD Display
JP2007171516A (en) * 2005-12-21 2007-07-05 Infovision Optoelectronics Holdings Ltd Liquid crystal display device and method for manufacturing the liquid crystal display device
CN104730773A (en) * 2013-12-18 2015-06-24 三星显示有限公司 Curved display device and method of manufacturing the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100315373B1 (en) * 1993-05-18 2002-12-12 소니 가부시끼 가이샤 LCD Display
JP2001033753A (en) * 1999-06-11 2001-02-09 Samsung Electronics Co Ltd Liquid crystal projection system
JP2007171516A (en) * 2005-12-21 2007-07-05 Infovision Optoelectronics Holdings Ltd Liquid crystal display device and method for manufacturing the liquid crystal display device
CN104730773A (en) * 2013-12-18 2015-06-24 三星显示有限公司 Curved display device and method of manufacturing the same
US10317735B2 (en) 2013-12-18 2019-06-11 Samsung Display Co., Ltd. Curved display device and method of manufacturing the same
CN104730773B (en) * 2013-12-18 2019-08-16 三星显示有限公司 It is bent display device and its manufacturing method

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