JPH01143119A - Television picture projector - Google Patents
Television picture projectorInfo
- Publication number
- JPH01143119A JPH01143119A JP62300810A JP30081087A JPH01143119A JP H01143119 A JPH01143119 A JP H01143119A JP 62300810 A JP62300810 A JP 62300810A JP 30081087 A JP30081087 A JP 30081087A JP H01143119 A JPH01143119 A JP H01143119A
- Authority
- JP
- Japan
- Prior art keywords
- crt
- projection
- radiator
- light
- heat dissipation
- 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.)
- Granted
Links
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 230000031700 light absorption Effects 0.000 claims description 8
- 101100112083 Arabidopsis thaliana CRT1 gene Proteins 0.000 abstract description 6
- 101100238301 Arabidopsis thaliana MORC1 gene Proteins 0.000 abstract description 6
- 101100519629 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PEX2 gene Proteins 0.000 abstract description 6
- 101100468521 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RFX1 gene Proteins 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 101150097247 CRT1 gene Proteins 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、投写用陰極線管（ＣＲＴ）により映出される
画像を、投写レンズによりスクリーン上に拡大投写する
、テレビジョン画像投写装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television image projection device that enlarges and projects an image projected by a projection cathode ray tube (CRT) onto a screen using a projection lens.
従来の技術
従来のテレビジョン画像投写装置の構造は、第２図に示
すように、投写用ＣＲＴ１を放熱用ラジェータ２に接着
剤３で固定し、このＣＲＴｌの前方に位置するように投
写レンズ６を放熱用ラジェータ２と鏡筒１２とで挾持し
て配置し、このＣＲＴｌと投写レンズ５と放熱用ラジェ
ータ２とで形成される空間に冷却液７を注入充填してい
た。2. Description of the Related Art As shown in FIG. 2, the structure of a conventional television image projection device is such that a projection CRT 1 is fixed to a heat dissipation radiator 2 with an adhesive 3, and a projection lens 6 is positioned in front of the CRT. is placed between a heat dissipation radiator 2 and a lens barrel 12, and a cooling liquid 7 is injected and filled into the space formed by the CRT1, the projection lens 5, and the heat dissipation radiator 2.
ここで４はＣＲＴｌの前面と放熱用ラジェータ２が接触
しないようにするための樹脂スペーサ、６は接着剤、１
１は鏡筒１２に支持された投写レンズである。したがっ
て、この従来の装置は、投写レンズ５の有効像高以外の
部分の表面およびＣＲＴ放熱用ラジェータ２の内面にお
いて、光の反射が生じるようになっている。Here, 4 is a resin spacer to prevent the front surface of the CRTl from coming into contact with the heat dissipation radiator 2, 6 is an adhesive, and 1
1 is a projection lens supported by a lens barrel 12. Therefore, in this conventional device, light is reflected on the surface of the projection lens 5 at a portion other than the effective image height and on the inner surface of the CRT heat dissipation radiator 2.
発明が解決しようとする問題点
しかしながら、上記のような構造では、ＣＲＴｌから発
せられた光の一部が、投写レンズ５の有効像高以外の部
分の表面およびＣＲＴ放熱用ラジェータ２の内面におい
て反射して、ＣＲＴ管面に戻るため、ＣＲＴｌにより映
出される画像のコントラストが低下するという問題があ
った。Problems to be Solved by the Invention However, in the above structure, a part of the light emitted from the CRT is reflected on the surface of the projection lens 5 other than the effective image height and on the inner surface of the CRT heat dissipation radiator 2. Then, since the light returns to the CRT tube surface, there is a problem in that the contrast of the image projected by the CRT1 decreases.
本発明は上記問題点に鑑み、ＣＲＴによシ映出される画
像のコントラストの低下が少ない、テレビジョン画像投
写装置を提供するものである。In view of the above-mentioned problems, the present invention provides a television image projection device in which the contrast of images projected on a CRT is less reduced.
問題点を解決するための手段
上記問題点を解決するため、本発明のテレビジョン画像
投写装置は、ＣＲＴ放熱用ラジェータの内面の一部を光
吸収処理すると共に、同ラジェータに、表面の一部を光
吸収処理した突部を投射レンズの有効像高以外の部分に
向かうＣＲＴからの光を遮るように設けたものである。Means for Solving the Problems In order to solve the above problems, the television image projection device of the present invention applies a light absorption treatment to a part of the inner surface of the CRT heat dissipation radiator, and also applies a light absorption treatment to a part of the surface of the radiator. A protrusion treated to absorb light is provided to block light from the CRT directed toward a portion other than the effective image height of the projection lens.
作 用
本発明は、上記した構成によって、表面を光吸収処理し
た面において光を吸収することによシ、ＣＲＴ管面に戻
る反射光を減らすこととなる。Effects According to the present invention, the light reflected back to the CRT tube surface is reduced by absorbing light on the surface treated with light absorption treatment.
実施例
以下本発明の一実施例のテレビジョン画像投写装置につ
いて、図面を参照しながら説明する。第１図は本発明の
一実施例の要部の側断面図である。Embodiment Hereinafter, a television image projection apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of a main part of an embodiment of the present invention.
第１図において、１はＣＲＴで、２はその放熱用のラジ
エータで、それらは接着剤３で接着されている。４はＣ
ＲＴｌの前面とＣＲＴ放熱用ラジェータ２とが接触しな
いようにするだめの樹脂スペーサである。６は投写用の
凹レンズで、ＣＲＴ放熱用ラジェータ２に接着剤６で接
着されている。In FIG. 1, 1 is a CRT, 2 is a radiator for heat dissipation, and these are bonded together with an adhesive 3. 4 is C
This is a resin spacer that prevents the front surface of the RTl from coming into contact with the CRT heat dissipation radiator 2. Reference numeral 6 denotes a concave lens for projection, which is bonded to the CRT heat dissipation radiator 2 with an adhesive 6.
ＣＲＴｌ、ＣＲ，Ｔ放熱用ラジェータ２、樹脂スペーサ
４、投写レンズ６によって囲まれる空間は、冷却液７に
よって満たされている。８はＣＲＴ放熱用ラジェータ２
に設けられた突部で、投写レンズ６の有効像高以外の部
分のＣＲＴ１側の面を覆うようになっている。突部８の
ＣＲＴ１側の而９および、ＣＲＴ放熱用ラジう−ク２の
内面の一部１ｏには、光吸収のだめの黒化処理がなされ
ている。また、１１は投写用の凸レンズで、１２はそれ
を保持するための鏡筒である。A space surrounded by the CRTl, CR, T heat dissipating radiator 2, resin spacer 4, and projection lens 6 is filled with a cooling liquid 7. 8 is CRT heat dissipation radiator 2
The protrusion provided on the projection lens 6 covers the surface of the CRT 1 side of the portion of the projection lens 6 other than the effective image height. A portion 9 of the protrusion 8 on the CRT 1 side and a portion 1o of the inner surface of the CRT heat dissipation radiator 2 are blackened to prevent light absorption. Further, 11 is a convex lens for projection, and 12 is a lens barrel for holding it.
以上のように構成されたテレビジョン画像投写装置にお
いては、面９および面１ｏに入射した光は、反射されず
吸収されてしまう。In the television image projection device configured as described above, the light incident on the surface 9 and the surface 1o is absorbed without being reflected.
したがって本実施例によれば、ＣＲＴ放−熱用ラジエー
タ２の内面の一部１ｏを黒化処理すると共に、同ラジェ
ータ２に表面の一部９を黒化処理した突部８を設けるこ
とにより、ＣＲＴｌから発せられた光がＣＲＴ管面に反
射光として戻るのを減らすことができ、ＣＲＴｌによシ
映出される映像のコントラストの低下を少なくすること
ができる。Therefore, according to this embodiment, by blackening a portion 1o of the inner surface of the CRT heat dissipating radiator 2, and by providing the radiator 2 with a protrusion 8 having a portion 9 of the surface blackening, It is possible to reduce the amount of light emitted from the CRTl that returns to the CRT tube surface as reflected light, and it is possible to reduce the decrease in contrast of images projected by the CRTl.
発明の効果
以上のように、本発明によれば、ＣＲＴ放熱用ラジェー
タの内面の一部を光吸収処理すると共に、同ラジェータ
に表面の一部を光吸収処理した突部を投射レンズの有効
像高以外の部分に向かうＣＲＴからの光を遮るように設
けたことにより、ＣＲＴに映出される画像のコントラス
トの低下を少なくすることができる。Effects of the Invention As described above, according to the present invention, a portion of the inner surface of the CRT heat dissipation radiator is treated for light absorption, and a protrusion on the radiator whose surface is partially treated for light absorption is used to form an effective image of the projection lens. By providing it so as to block light from the CRT toward areas other than the height, it is possible to reduce the decrease in contrast of the image displayed on the CRT.
第１図は本発明の一実施例におけるテレビジョン画像投
写装置の要部の側断面図、第２図は従来例のテレビジ１
ン画像投写装置の要部の側断面図である。
１・・・・・・ＣＲＴ、２・・・・・・ＣＲＴ放熱用ラ
ジェータ、６・・・・・・投写レンズ、８・・・・・・
突部、９，１ｏ・・・・・・光吸収処理を施した面。
！−・−０ＲＴ ７−・冷郡淡ｚ−ｃＲ
ｒ＊；ｌラジｊ！り β−゛突部３−−−斗饗、１１
ｑ−一一光版」又り悲運しｒ＝Ｅ
幻４−川縁スベ−４ｔｆ−・投写レンズ
５−・−投写レンズ ／Ｚ−４１，湾６・−按
Ｊ侶
第 １ 図FIG. 1 is a side sectional view of main parts of a television image projection device according to an embodiment of the present invention, and FIG. 2 is a side sectional view of a conventional television image projection device.
FIG. 2 is a side sectional view of the main parts of the image projection device. 1... CRT, 2... CRT heat dissipation radiator, 6... Projection lens, 8...
Projection, 9, 1o... Surface subjected to light absorption treatment. ! -・-0RT 7-・Reiguntanz-cR
r*；lradij! ri β-゛Protrusion 3---Doujo, 11
q-ichiichiko version” again, tragic r=E
Illusion 4-Riverside Sube-4tf-・Projection lens 5-・-Projection lens /Z-41, Bay 6・-按J-su No. 1
Claims (1)
れる投写レンズと、上記投写用陰極線管を固定する放熱
用ラジエータを設け、この放熱用ラジエータの一部に、
上記投写レンズの有効像高以外の部分に向かう上記投写
用陰極線管からの光を遮るように突部を設け、この突起
および放熱用ラジエータの内面に光吸収処理を施したテ
レビジョン画像投写装置。A projection cathode ray tube, a projection lens disposed in front of the projection cathode ray tube, and a heat dissipation radiator for fixing the projection cathode ray tube are provided, and a part of the heat dissipation radiator includes:
A television image projection device, wherein a protrusion is provided to block light from the projection cathode ray tube directed toward a portion other than the effective image height of the projection lens, and a light absorption treatment is applied to the protrusion and the inner surface of the heat dissipation radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30081087A JP2759948B2 (en) | 1987-11-27 | 1987-11-27 | Television image projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30081087A JP2759948B2 (en) | 1987-11-27 | 1987-11-27 | Television image projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01143119A true JPH01143119A (en) | 1989-06-05 |
| JP2759948B2 JP2759948B2 (en) | 1998-05-28 |
Family
ID=17889375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30081087A Expired - Lifetime JP2759948B2 (en) | 1987-11-27 | 1987-11-27 | Television image projector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2759948B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0327179U (en) * | 1989-07-27 | 1991-03-19 | ||
| JPH0328885U (en) * | 1989-07-31 | 1991-03-22 |
-
1987
- 1987-11-27 JP JP30081087A patent/JP2759948B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0327179U (en) * | 1989-07-27 | 1991-03-19 | ||
| JPH0328885U (en) * | 1989-07-31 | 1991-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2759948B2 (en) | 1998-05-28 |
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