JP2755708B2 - LCD projector - Google Patents

LCD projector

Info

Publication number
JP2755708B2
JP2755708B2 JP1208108A JP20810889A JP2755708B2 JP 2755708 B2 JP2755708 B2 JP 2755708B2 JP 1208108 A JP1208108 A JP 1208108A JP 20810889 A JP20810889 A JP 20810889A JP 2755708 B2 JP2755708 B2 JP 2755708B2
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal panel
optical axis
projector
polarizing plates
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
Application number
JP1208108A
Other languages
Japanese (ja)
Other versions
JPH0371110A (en
Inventor
俊一 岸本
康夫 船造
孝司 三輪
和宏 河野
五郎 濱岸
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.)
Sanyo Denki Co Ltd
Original Assignee
Sanyo Denki Co Ltd
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 Sanyo Denki Co Ltd filed Critical Sanyo Denki Co Ltd
Priority to JP1208108A priority Critical patent/JP2755708B2/en
Priority to EP90113877A priority patent/EP0409246B1/en
Priority to DE69030537T priority patent/DE69030537T2/en
Priority to KR1019900011059A priority patent/KR0138759B1/en
Publication of JPH0371110A publication Critical patent/JPH0371110A/en
Priority to US07/885,693 priority patent/US5473339A/en
Application granted granted Critical
Publication of JP2755708B2 publication Critical patent/JP2755708B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Projection Apparatus (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

【発明の詳細な説明】 (イ) 産業上の利用分野 本発明は液晶パネルをライトバルブとして用いる液晶
プロジェクタに関する。
The present invention relates to a liquid crystal projector using a liquid crystal panel as a light valve.

(ロ) 従来の技術 液晶パネルをライドバルブとして用いる液晶プロジェ
クタは例えば特開昭61−150487号に記載されている。
(B) Conventional technology A liquid crystal projector using a liquid crystal panel as a ride valve is described in, for example, JP-A-61-150487.

上記液晶プロジェクタに使用される液晶パネルには高
コントラスト比を得るために通常ノーマリホワイト型の
ものが使用される。しかしながら、このタイプの液晶パ
ネルは急峻な優先視野角(約6゜)が存在し、この角度
からずれた光に対しては急激にコントラスト比が低下す
る。
As a liquid crystal panel used in the above-mentioned liquid crystal projector, a normally white type is usually used in order to obtain a high contrast ratio. However, this type of liquid crystal panel has a steep priority viewing angle (about 6 °), and the contrast ratio sharply drops for light deviating from this angle.

従って、従来は第2図に示す如く液晶パネル(1)、
液晶パネル固定板(2)、取付け板(3)、入射側及び
出射側の偏光板(4)(5)、放熱板(6)及びコンデ
ンサレンズ(7)等が一体にされた液晶パネルアッセン
ブリ全体を光軸(X)と直交する方向に対して約6゜傾
斜させて配置していた。
Therefore, conventionally, as shown in FIG. 2, the liquid crystal panel (1),
The entire liquid crystal panel assembly in which the liquid crystal panel fixing plate (2), the mounting plate (3), the entrance and exit polarizers (4) and (5), the radiator plate (6), and the condenser lens (7) are integrated. Is inclined at about 6 ° with respect to a direction orthogonal to the optical axis (X).

(ハ) 発明が解決しようとする課題 通常、入射側及び出射側の偏光板はポラライザー及び
アナライザーとして機能するが、光が直交して入射した
場合のみ良好に動作する。しかしながら、上記従来例に
おける偏光板は約6゜傾斜しているため良好な上記動作
が行なえず結果としてコントラストの悪い画像となって
いた。
(C) Problems to be Solved by the Invention Normally, the polarizing plates on the entrance side and the exit side function as polarizers and analyzers, but operate well only when light is incident orthogonally. However, since the polarizing plate in the above-mentioned conventional example is tilted by about 6 °, the above-mentioned good operation cannot be performed, resulting in an image having poor contrast.

本発明は上記欠点を解消するもので、良好なコントラ
ストの画像を得ることを目的とする。
An object of the present invention is to solve the above-mentioned drawbacks and to obtain an image with good contrast.

(ニ) 課題を解決するための手段 本発明は液晶パネルをライトバルブとして使用する液
晶プロジェクタにおいて、前記液晶パネルの前後に一体
的に取り付けられた一対の偏光板を備え、前記液晶パネ
ルは光軸と直交する方向に対して所定角度傾斜して配置
されると共に、前記一対の偏光板はスペーサ部材を介し
て前記液晶パネルに取り付けられ、前記光軸に直交して
配置されていることを特徴とする。
(D) Means for Solving the Problems The present invention relates to a liquid crystal projector using a liquid crystal panel as a light valve, comprising a pair of polarizing plates integrally attached before and after the liquid crystal panel, wherein the liquid crystal panel has an optical axis. And a pair of polarizers are attached to the liquid crystal panel via a spacer member, and are arranged perpendicular to the optical axis. I do.

(ホ) 作用 本発明によれば、液晶パネルは優先視野角に基づいて
最適なコントラスト比にすることができると共に、偏光
板はポラライザー及びアナライザーとして良好に動作す
る。
(E) Function According to the present invention, the liquid crystal panel can have an optimum contrast ratio based on the preferential viewing angle, and the polarizing plate can operate well as a polarizer and an analyzer.

(へ) 実施例 以下、図面に従い本発明の一実施例を説明する。(F) Example An example of the present invention will be described below with reference to the drawings.

第1図は本実施例における液晶パネルアッセンブリの
断面図を示し、第2図と同一部分には同一符号を付し説
明を省略する。
FIG. 1 is a sectional view of a liquid crystal panel assembly according to the present embodiment, and the same parts as those in FIG.

本実施例では液晶パネル(1)、液晶パネル固定板
(2)及び装置本体に取付ける取付板(3)は光軸
(X)に直交する方向に対して約6゜傾斜して取付けら
れる。
In this embodiment, the liquid crystal panel (1), the liquid crystal panel fixing plate (2), and the mounting plate (3) mounted on the apparatus main body are mounted at an angle of about 6 ° with respect to the direction orthogonal to the optical axis (X).

そして、入射側の偏光板(4)が貼付されたコンデン
サレンズ(7)は光軸(X)に対して直交して位置する
様に、液晶パネル固定板(3)に対して6゜傾斜してス
ペーサ(8)(9)により取付けられている。
The condenser lens (7) to which the polarizing plate (4) on the incident side is attached is tilted by 6 ° with respect to the liquid crystal panel fixing plate (3) so as to be orthogonal to the optical axis (X). And are attached by spacers (8) and (9).

更に出射側偏光板(5)は液晶パネル(1)との間の
6゜傾斜した角度スペーサ(10)を介して取付けられる
ため光軸(X)に対して直角に配置される。
Further, since the output side polarizing plate (5) is attached via an angle spacer (10) inclined by 6 ° between the output side polarizing plate (1) and the liquid crystal panel (1), it is disposed at right angles to the optical axis (X).

(ト) 発明の効果 上述の如く本発明に依れば、液晶パネルは優先視野角
に基づいて光軸に対して傾斜しているため、最適なコン
トラストが得られる。また、入射側及び出射側偏光板は
光軸に対して直角に配置されるため偏光板として良好に
動作する。
(G) Effect of the Invention According to the present invention as described above, the liquid crystal panel is inclined with respect to the optical axis based on the preferential viewing angle, so that an optimum contrast can be obtained. Further, since the incident side and the exit side polarizing plates are arranged at right angles to the optical axis, they operate well as polarizing plates.

更に、偏光板と液晶パネルとの間はスペーサにより必
然的に空間が形成されるため、偏光板の発熱は効率良く
放熱される。
Further, since a space is inevitably formed between the polarizing plate and the liquid crystal panel by the spacer, heat generated by the polarizing plate is efficiently radiated.

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

第1図は本発明の一実施例における液晶アッセンブリの
断面図、第2図は従来の液晶アッセンブリの断面図であ
る。 (1)……液晶パネル、(4)(5)……偏光板、
(8)(9)スペーサ、(10)……角度スペーサ
FIG. 1 is a sectional view of a liquid crystal assembly according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional liquid crystal assembly. (1) Liquid crystal panel, (4) (5) Polarizing plate,
(8) (9) Spacer, (10) ... Angle spacer

フロントページの続き (72)発明者 河野 和宏 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 (72)発明者 濱岸 五郎 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 (56)参考文献 特開 昭62−109024(JP,A) 実開 昭64−30978(JP,U)(72) Inventor Kazuhiro Kono 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Goro 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-62-109024 (JP, A) Jpn.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】液晶パネルをライトバルブとして使用する
液晶プロジェクタにおいて、 前記液晶パネルの前後に一体的に取り付けられた一対の
偏光板を備え、 前記液晶パネルは光軸と直交する方向に対して所定角度
傾斜して配置されると共に、前記一対の偏光板はスペー
サ部材を介して前記液晶パネルに取り付けられ、前記光
軸に直交して配置されていることを特徴とする液晶プロ
ジェクタ。
1. A liquid crystal projector using a liquid crystal panel as a light valve, comprising: a pair of polarizing plates integrally mounted on front and rear sides of the liquid crystal panel, wherein the liquid crystal panel has a predetermined direction in a direction perpendicular to an optical axis. A liquid crystal projector, wherein the liquid crystal projector is disposed at an angle and the pair of polarizing plates are attached to the liquid crystal panel via a spacer member, and are disposed orthogonal to the optical axis.
JP1208108A 1989-07-20 1989-08-11 LCD projector Expired - Fee Related JP2755708B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1208108A JP2755708B2 (en) 1989-08-11 1989-08-11 LCD projector
EP90113877A EP0409246B1 (en) 1989-07-20 1990-07-19 Liquid crystal projector
DE69030537T DE69030537T2 (en) 1989-07-20 1990-07-19 Liquid crystal projector
KR1019900011059A KR0138759B1 (en) 1989-07-20 1990-07-20 Liquid crystal projector
US07/885,693 US5473339A (en) 1989-07-20 1992-05-19 Liquid crystal projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1208108A JP2755708B2 (en) 1989-08-11 1989-08-11 LCD projector

Publications (2)

Publication Number Publication Date
JPH0371110A JPH0371110A (en) 1991-03-26
JP2755708B2 true JP2755708B2 (en) 1998-05-25

Family

ID=16550770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1208108A Expired - Fee Related JP2755708B2 (en) 1989-07-20 1989-08-11 LCD projector

Country Status (1)

Country Link
JP (1) JP2755708B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2594501Y2 (en) * 1992-03-30 1999-04-26 株式会社ケンウッド Holding mechanism of condenser lens for LCD projector
JPH0744836U (en) * 1992-06-08 1995-11-28 株式会社ケンウッド LCD projector
JP2624116B2 (en) * 1993-04-22 1997-06-25 松下電器産業株式会社 Liquid crystal display device and projection display device using the same
ATE203867T1 (en) * 1997-05-20 2001-08-15 Barco Nv CONTRAST IMPROVEMENT IN IMAGE PROJECTORS WITH LIQUID CRYSTAL LIGHT VALVE
DE102005032381A1 (en) 2005-07-08 2007-01-11 Wobben, Aloys, Dipl.-Ing. Turbine for a hydroelectric plant
JP5603539B2 (en) 2008-03-03 2014-10-08 セイコーエプソン株式会社 Liquid crystal device and electronic device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62109024A (en) * 1985-11-07 1987-05-20 Kawasaki Heavy Ind Ltd Structure for combining liquid crystal panel for image projection
JPS6430978U (en) * 1987-08-19 1989-02-27

Also Published As

Publication number Publication date
JPH0371110A (en) 1991-03-26

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