JPS61163544A - Projection cathode-ray tube device - Google Patents
Projection cathode-ray tube deviceInfo
- Publication number
- JPS61163544A JPS61163544A JP346385A JP346385A JPS61163544A JP S61163544 A JPS61163544 A JP S61163544A JP 346385 A JP346385 A JP 346385A JP 346385 A JP346385 A JP 346385A JP S61163544 A JPS61163544 A JP S61163544A
- Authority
- JP
- Japan
- Prior art keywords
- face plate
- projection
- mesh
- projection tube
- lens
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/006—Arrangements for eliminating unwanted temperature effects
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はテレビジョン画悔投写装置に使用される投写管
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 projection tube device used in a television projection device.
従来の技術
大画面のテレビジョン画像を得るために、比較的小さな
峡−管にテレビジョン画像を映出し、投写レンズにより
スクリーンに拡大投写する方法は従来からよく知られて
いる。この場合、映像管と投写レンズとの囚は空気で満
たされているため、映*t*、のフェイスプレート及び
投写レンズのレンズ面で光の反射が起こり、直接スクリ
ーンに達する光陽が低下し、画橡が暗くなる。又、多重
に反射された光が不要光としてスクリーンに達し、画像
の明部が白っぽくなり、コントラストが低下するなど、
画質、1の問題があった。この対策として、実開昭58
−2850号公報に記載されているように、フェイスプ
レートと投写レンズとの門に、フェイスプレート及び投
写レンズと屈折率が同程度の透明なゲルを充1し、フェ
イスプレート及び投写レンズのレンズ面で生ずる光の反
射をなくし、画質を白土させる方法が提案されている。2. Description of the Related Art In order to obtain a large-screen television image, a method of projecting the television image onto a relatively small canthus tube and enlarging it and projecting it onto a screen using a projection lens is well known. In this case, since the space between the picture tube and the projection lens is filled with air, light is reflected on the face plate of the picture tube and the lens surface of the projection lens, reducing the amount of light that reaches the screen directly. The screen becomes dark. In addition, the multiple reflected light reaches the screen as unnecessary light, causing bright areas of the image to become whitish and contrast to decrease.
There was a problem with image quality. As a countermeasure to this,
As described in Publication No. 2850, the gate between the face plate and the projection lens is filled with a transparent gel having a refractive index similar to that of the face plate and the projection lens, and the lens surface of the face plate and the projection lens is A method has been proposed to eliminate the reflection of light that occurs in the process and improve the image quality.
以下、図面を用いながら上述した従来の投写管の一例に
ついて説明する。第4図は従来の透明なゲルをフェイス
プレートと投写レンズとの間に充填した投写管装置の断
面図である。投写管1のフェイスプレート2と投写レン
ズ3の中の最も投写管1に近いレンズ4との周縁部にゴ
ムバッキング5を配し、これらで構成された空間に透明
なゲル6を充填している。ゲル6をガラスに近い屈折率
を有したものにすることで、フェイスプレート2及び投
写レンズ3のレンズ而7における光の反射を小さくでき
、スクリーンに達する光量が増加し、画像が明るくなり
、また各面で多重反射されてからスクリーンに達する不
要光が激減】るために、コントラストが向上する。An example of the conventional projection tube mentioned above will be described below with reference to the drawings. FIG. 4 is a sectional view of a projection tube device in which a conventional transparent gel is filled between a face plate and a projection lens. A rubber backing 5 is arranged around the periphery of the face plate 2 of the projection tube 1 and the lens 4 closest to the projection tube 1 among the projection lenses 3, and the space formed by these is filled with a transparent gel 6. . By making the gel 6 have a refractive index close to that of glass, it is possible to reduce the reflection of light on the face plate 2 and the lenses 7 of the projection lens 3, increasing the amount of light that reaches the screen, making the image brighter, and Contrast is improved because the amount of unnecessary light that reaches the screen after multiple reflections on each surface is drastically reduced.
発明が解決しようとする問題点
しかしながら、第4図に示したような投写管装置は、ゲ
ル6及び周縁部のゴムバッキング5の放熱効果がよくな
いために、フIイブレート2の温度が上昇するが、フェ
イスプレート2の中央部と周辺部とで温度差を生じ、投
写管1が爆縮する場合がある。又、明るい画像を冑るた
めに投写管1に大きな電力を入力しても投写管1が爆縮
する場合がある。更に、グル6を通してレンズ4も加熱
され、特に樹脂で構成されたレンズの場合にはレンズが
歪み、画質が劣化する場合がある。Problems to be Solved by the Invention However, in the projection tube device as shown in FIG. 4, the temperature of the filament plate 2 increases because the heat dissipation effect of the gel 6 and the rubber backing 5 at the peripheral portion is poor. However, a temperature difference may occur between the center and peripheral portions of the face plate 2, and the projection tube 1 may implode. Furthermore, even if a large amount of power is input to the projection tube 1 in order to clear a bright image, the projection tube 1 may implode. Furthermore, the lens 4 is also heated through the glue 6, which may distort the lens and deteriorate the image quality, especially in the case of a lens made of resin.
問題を解決するための手段
上記問題を解決するため、本発明の投写管装置は、投写
管と、この投写管のフェイスプレートの前りに配置され
た透明体と、前記フェイスプレートと前記透明体との間
に配置された透明なゲルと、このゲルの中に配向された
熱伝導性の良好な表面を黒色としたメッシlとを備えた
構成としたものである。Means for Solving the Problems In order to solve the above problems, the projection tube device of the present invention includes a projection tube, a transparent body disposed in front of the face plate of the projection tube, and the face plate and the transparent body. The structure includes a transparent gel disposed between the transparent gel and a mesh l having a black surface with good thermal conductivity and oriented within the gel.
作用
上記構成において、投写管の駆動によりフェイスプレー
トは加熱されるが、その温度は一般に中央部ではnく、
周辺部ではこれより低くなり、温度差を生ずる。ゲルも
この影響を受け、中央部と周辺部とで温度差を生ずるが
、本発明においては、ゲルの中にメツシュを配しており
、これを通して良好な伝熱が行なわれる。この結果、フ
ェイスプレートの温度差も著しく軽減される。またメツ
シュの表面を黒色としたので、投写光の乱反射を防ぐこ
とができ、コントラストの高い画像を得るこくとができ
る。Function In the above configuration, the face plate is heated by driving the projection tube, but the temperature is generally lower at the center.
At the periphery, the temperature is lower than this, creating a temperature difference. The gel is also affected by this, resulting in a temperature difference between the center and the periphery, but in the present invention, a mesh is placed inside the gel, and good heat transfer occurs through this. As a result, the temperature difference across the faceplate is also significantly reduced. Furthermore, since the surface of the mesh is black, it is possible to prevent diffused reflection of the projection light, and it is possible to obtain an image with high contrast.
実施例
以下、本発明の実施例を第1図〜第3図に慕づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
第1図は本発明の第1の実施例における投写管装置の断
面図で、投写管1のフェイスプレート2ゴムバツキング
5と投写レンズ3の投写箆1に最も近いレンズ4とで囲
まれる空間に透明なゲル6が充填され、このゲルの中に
は第2図に示qようなメツシュ8が配設されている。こ
のメツシュ8はアルミ、銅或いは銀などの良好な熱伝導
性を有する材料からなり、その表面を黒色とすることに
より、投写光の乱反射を防ぎ、」ントラストの^い画像
を得るようにしている。前記レンズ4は樹脂により構成
されている・。FIG. 1 is a cross-sectional view of the projection tube device according to the first embodiment of the present invention, in which a transparent space is formed in the space surrounded by the face plate 2 of the projection tube 1, the rubber backing 5, and the lens 4 of the projection lens 3, which is closest to the projection head 1. A mesh 8 as shown in FIG. 2 is disposed inside the gel. This mesh 8 is made of a material with good thermal conductivity such as aluminum, copper, or silver, and its surface is black to prevent diffuse reflection of the projected light and to obtain images with high contrast. . The lens 4 is made of resin.
このように構成された投写管装置について、その動作を
説明する。投写管1の駆動によりフエイプレート2が加
熱されて温度が上昇するが、その温度L Rは中央部で
高く周辺部では低く、温度差を生ずるため、ゲル6も中
央部と周辺部とで温度差を生じる。しかし中央部の高い
熱はメツシュ8により周辺部に伝熱され、ゲル6の中央
部と周辺部との温度差は著しく軽減される。この作用に
よりフェイスプレート2の中央部は放熱効果がよくなる
ため、温度が下がり、一方円辺部の温度は上がるために
、フェイスプレート2において中央部と周辺部との温度
差が茗しく軽減され、したがって爆縮の危険が防げる。The operation of the projection tube device configured as described above will be explained. When the projection tube 1 is driven, the ray plate 2 is heated and its temperature rises, but the temperature L R is higher at the center and lower at the periphery, creating a temperature difference. Creates a temperature difference. However, the high heat in the center is transferred to the periphery by the mesh 8, and the temperature difference between the center and periphery of the gel 6 is significantly reduced. This action improves the heat dissipation effect in the central part of the face plate 2, so the temperature decreases, while the temperature in the circular parts increases, so the temperature difference between the central part and the peripheral part of the face plate 2 is reduced considerably. Therefore, the risk of implosion is prevented.
第3図は本発明のfJ52の実施例における投写管¥i
、Hの断面図である。本実施例は第1の実施例とほぼ同
じ構成であるが、メッシ:I8の周縁部を放熱板9に接
続している。Figure 3 shows the projection tube ¥i in the fJ52 embodiment of the present invention.
, H is a sectional view of FIG. This embodiment has almost the same configuration as the first embodiment, but the peripheral edge of the mesh I8 is connected to the heat sink 9.
このように構成された投写管装置について、その動作を
説明する。投写管1のW!動によりフェイスプレート2
で発生した熱は、ゲル6及びメツシュ8を通して放熱板
9に伝えられ、最終的には放熱板9がら空気中に放熱さ
れる。この放熱効果によりフェイスプレート2の温度上
昇は抑えられるため、投写管1には放熱板9のない場合
より大きな電力を入力でき、さらに明るい画像を得るこ
とができる。またレンズ4に伝わる熱が著しく減少する
ことから、レンズ4の歪による画質の劣化が茗しく改善
される。The operation of the projection tube device configured as described above will be explained. Projection tube 1 W! Face plate 2 due to movement
The heat generated is transferred to the heat sink 9 through the gel 6 and the mesh 8, and is finally radiated into the air through the heat sink 9. This heat dissipation effect suppresses the temperature rise of the face plate 2, so that a larger amount of power can be input to the projection tube 1 than in the case without the heat dissipation plate 9, and a brighter image can be obtained. Furthermore, since the heat transmitted to the lens 4 is significantly reduced, deterioration in image quality due to distortion of the lens 4 is significantly improved.
発明の効果
以上述べたごとく本発明によれば、ゲルの中に熱伝導性
の良好なメツシュを配置したので、フェイスプレー1〜
の中央部と周3u部との温度差を小さくでき、したがっ
て投写管の爆縮を防ぐ口とがでさると」tに1画質劣化
のない、明るい画像が冑られる。Effects of the Invention As described above, according to the present invention, a mesh with good thermal conductivity is placed in the gel, so that face sprays 1 to 1
If the temperature difference between the central part and the circumferential part 3u can be reduced, and a mouth is created to prevent implosion of the projection tube, a bright image with no image quality deterioration can be produced.
第1図は本発明の第1の実施例における投写管装置の断
面図、第2図は同投写管装四におけるメツシュの斜視図
、第3図は本発明の第2の実施例における投写管装置の
断面図、第4図は従来の投写管装置の断面図である。
1・・・投写管、2・・・フェイスプレート、4・・・
レンズ、6・・・ゲル、8・・・メツシュ、9・・放熱
板第1図
/−一摺ツ管
2−−7エイス7−レト
第2図FIG. 1 is a sectional view of a projection tube device according to a first embodiment of the present invention, FIG. 2 is a perspective view of a mesh in the same projection tube device, and FIG. 3 is a cross-sectional view of a projection tube device according to a second embodiment of the present invention. FIG. 4 is a sectional view of a conventional projection tube device. 1... Projection tube, 2... Face plate, 4...
Lens, 6...Gel, 8...Mesh, 9...Radiation plate Fig. 1/-Issuri tube 2--7 Eighth 7-Reto Fig. 2
Claims (1)
配置された透明体と、前記フェイスプレートと前記透明
体との間に配置された透明なゲルと、このゲルの中に配
置された熱伝導性の良好な表面を黒色としたメッシュと
を備えた投写管装置。 2、メッシュは、周縁部を放熱板に接続される構成とし
た特許請求の範囲第1項記載の投写管装置。 3、透明体は樹脂で構成されたレンズである特許請求の
範囲第1項または第2項記載の投写管装置。[Claims] 1. A projection tube, a transparent body disposed in front of a face plate of the projection tube, a transparent gel disposed between the face plate and the transparent body, and a transparent gel disposed in front of the face plate of the projection tube; A projection tube device comprising: a mesh having a black surface with good thermal conductivity disposed therein; 2. The projection tube device according to claim 1, wherein the mesh has a peripheral portion connected to a heat sink. 3. The projection tube device according to claim 1 or 2, wherein the transparent body is a lens made of resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP346385A JPS61163544A (en) | 1985-01-11 | 1985-01-11 | Projection cathode-ray tube device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP346385A JPS61163544A (en) | 1985-01-11 | 1985-01-11 | Projection cathode-ray tube device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61163544A true JPS61163544A (en) | 1986-07-24 |
Family
ID=11558017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP346385A Pending JPS61163544A (en) | 1985-01-11 | 1985-01-11 | Projection cathode-ray tube device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61163544A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6297228A (en) * | 1985-06-05 | 1987-05-06 | Hitachi Ltd | Liquid-cooled projection type cathode-ray tube |
KR20040025382A (en) * | 2002-09-19 | 2004-03-24 | 삼성에스디아이 주식회사 | Assembly of plasma display panel |
-
1985
- 1985-01-11 JP JP346385A patent/JPS61163544A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6297228A (en) * | 1985-06-05 | 1987-05-06 | Hitachi Ltd | Liquid-cooled projection type cathode-ray tube |
KR20040025382A (en) * | 2002-09-19 | 2004-03-24 | 삼성에스디아이 주식회사 | Assembly of plasma display panel |
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