JPH01170177A - Cathode ray tube projector - Google Patents
Cathode ray tube projectorInfo
- Publication number
- JPH01170177A JPH01170177A JP62326969A JP32696987A JPH01170177A JP H01170177 A JPH01170177 A JP H01170177A JP 62326969 A JP62326969 A JP 62326969A JP 32696987 A JP32696987 A JP 32696987A JP H01170177 A JPH01170177 A JP H01170177A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- cathode ray
- ray tube
- liquid
- temperature
- 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
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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えばカラープロジェクタに用いる陰極線管
投写装置に係り、特に、高輝度、ハイコントラストでし
かも安価な装置とすることのできる構成を備えた陰極線
管投写装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cathode ray tube projection device used for example in a color projector, and in particular, to a cathode ray tube projection device that has a configuration that allows the device to have high brightness, high contrast, and be inexpensive. The present invention relates to a cathode ray tube projection device.
従来、高輝度を得る陰極線管装置としては、特公昭５９
−１０５２７号公報に開示されているように、陰極線管
の前面パネルと所要の間隔を保持して対向する透明パネ
ルが設けられ、この透明パネルと上記前面パネルとの間
に液密に保持される密閉室を設け、この密閉室に液体を
封入した、いわゆる、液冷管を形成し別に準備された投
写レンズ系に投写する構造がとられていた。Conventionally, as a cathode ray tube device that obtains high brightness, the
As disclosed in Publication No. 10527, a transparent panel is provided that faces the front panel of the cathode ray tube with a required distance therebetween, and is held liquid-tight between the transparent panel and the front panel. A structure has been adopted in which a sealed chamber is provided, a liquid is sealed in the sealed chamber to form a so-called liquid-cooled tube, and the image is projected onto a separately prepared projection lens system.
しかし、上述した構造では、光学系にとって何ら役目を
分担しない透明パネルを用いており、部品コスト及び組
立工数がかかつていた。しかも、この透明パネルは投写
レンズと光学的に分離していたため、透明パネル及び投
写レンズ面での表面反射がありコントラストが低下する
という問題点があった＠
〔発明が解決しようとする問題点〕
上記従来技術は、コントラストを主体とする画像性能及
びコストの点について配慮され【おらず、例えばカラー
プロジェクタ用に採用する場合１画像性能及びコストの
点で問題があった。However, the above-described structure uses a transparent panel that does not share any role with the optical system, resulting in high parts costs and assembly man-hours. Moreover, since this transparent panel was optically separated from the projection lens, there was a problem that surface reflection occurred on the surface of the transparent panel and the projection lens, resulting in a decrease in contrast. The above-mentioned conventional technology does not take into account image performance, mainly contrast, and cost, and when adopted for a color projector, for example, there are problems in single image performance and cost.
本発明の目的は、従来技術での上記した問題点を解決し
、高性能でかつ安価な陰極線管投写装置を提供すること
にある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a high-performance and inexpensive cathode ray tube projection device.
上記目的は、次の３点を含む構成とすることで達成され
る。すなわち、（１）透明パネルの採用をやめて、投写
レンズ系を構成するレンズ群のうち陰極線管に最も近い
レンズ玉である入射レンズと陰極線管の前面パネルとを
所要の間隔を保持して対向して配置し、この入射レンズ
と上記前面パネルとの間を液密に保持される密閉室とし
、この密閉室に液体を封入すること、（２）液体として
安価な液体を用いること、及び（３）投写レンズにプラ
スチック製レンズを用いること、により達成される。な
お、入射レンズ以外の他のレンズを他の目的に用いるた
めに、例えば温度変化による焦点ずれを防止するために
、入射レンズ以外に設けられる主レンズをガラス製のレ
ンズとする、プラスチックとガラスとのハイブリッドレ
ンズ構成としても、本発明の目的は達成される。The above object is achieved by a configuration including the following three points. In other words, (1) the use of transparent panels has been eliminated, and the entrance lens, which is the lens element closest to the cathode ray tube among the lens groups constituting the projection lens system, is opposed to the front panel of the cathode ray tube, with the required distance maintained; (2) using an inexpensive liquid as the liquid; (2) using an inexpensive liquid as the liquid; ) This is achieved by using a plastic lens for the projection lens. In addition, in order to use lenses other than the input lens for other purposes, for example to prevent focal shifts due to temperature changes, the main lens provided other than the input lens is a glass lens. The object of the present invention can also be achieved with a hybrid lens configuration.
陰極線管投写装置に用いる液体としては、水を５−５０
％含有するエチレングリコールが公知である〇ところが
、水を含有する液体を用いる場合、入射レンズを構成す
る素材が、プラスチックレンズ素材として常用されるポ
リメチルメタクリレート。The liquid used in cathode ray tube projection equipment is water at 5-50%
% of ethylene glycol is well known. However, when using a liquid containing water, the material that makes up the input lens is polymethyl methacrylate, which is commonly used as a plastic lens material.
ポリスチレン、スチレン、アクリロニトリル共重合体、
スチレン・メチルタフリレート共重合体では、入射レン
ズは安価に造ることができるが、上記プラスチック素材
の透水（湿）性のため長期間の使用中に該液体中の水が
抜け、光学性能液冷効果の低下をきた丁。また、これら
プラスチック素材は、高々１００℃までの温度しか耐ら
れず陰極線管への入力パワーが制限され高輝度の陰極線
管投写装置実現の阻害要素になっていた。高耐熱性の素
材として知られるポリカーボネートで入射レンズを形成
した場合、高輝度化には有効であるが、長期間の使用中
に該液体中の水が抜ける欠点があり、また該入射レンズ
の該液体接触面からクラックが入りコントラストの低下
をきた丁。極端な場合、該クラックが入射レンズを慣き
、割れとなって液密性が保持できなくなる。polystyrene, styrene, acrylonitrile copolymer,
With styrene-methyltafrylate copolymer, the entrance lens can be manufactured at low cost, but due to the water permeability (moisture) of the plastic material mentioned above, the water in the liquid escapes during long-term use, resulting in optical performance. Ding has become less effective. Furthermore, these plastic materials can only withstand temperatures of up to 100° C., which limits the input power to the cathode ray tube, which has been an impediment to the realization of high-brightness cathode ray tube projection devices. When the input lens is made of polycarbonate, which is known as a highly heat-resistant material, it is effective for increasing brightness, but it has the disadvantage that water in the liquid will escape during long-term use, and the A knife that has cracked from the liquid contact surface, resulting in a decrease in contrast. In extreme cases, the cracks may penetrate the entrance lens, causing cracks and making it impossible to maintain liquid tightness.
一方、該液体として水を含まない前記有機溶赳または、
ポリエチレングリコール、エチレングリコール、グリセ
リン等の多価アルコールの単体又は混合してなる液体を
用いる場合、上記したレンズ素材が溶解又は侵されたり
、該液体の粘度が高い為、充分な液冷効果が得られない
という欠点がある。On the other hand, the organic solution does not contain water as the liquid, or
When using a liquid made of polyhydric alcohols such as polyethylene glycol, ethylene glycol, glycerin, etc. alone or in combination, the lens materials mentioned above may be dissolved or eroded, and the liquid may have a high viscosity, making it impossible to obtain sufficient liquid cooling effects. The disadvantage is that it cannot be used.
このような実験事実に対処して、本発明では、透水（湿
）性が小さく、又、形状保持温度が高くかつ透明性に優
れ、耐薬品（有機溶剤、多価アルコール）性に優れた４
−メチルペンテン重合体により入射レンズを形成する。In response to these experimental facts, the present invention has developed a 4-layer material that has low water permeability (humidity), high shape retention temperature, excellent transparency, and excellent chemical resistance (organic solvents, polyhydric alcohols).
- Forming the entrance lens by a methylpentene polymer.
４−メチルペンテン重合体は、透水（湿）性が小さく、
又、形状保持温度が高くかつ透明性に優れ耐薬品性に優
れる為、陰極線管の発光体の耐熱温度又は、陰極線管が
熱的に破壊する温度（通常１００乃至１５０℃）まで陰
極陰管に入力できる。液冷用液体としては、安価で粘度
が低い水系液体（５乃至５０重量パーセントの水を含有
するエチレングリコール等）を用いることができるので
高輝度の陰極線管装置が実現できる。父、該液体として
高屈折率液体（グリセリン等）が使用できることから高
解像度陰極線管投写装置が実現できる。4-methylpentene polymer has low water permeability (wet),
In addition, it has a high shape retention temperature, excellent transparency, and excellent chemical resistance, so it can be used in cathode ray tubes up to the heat resistance temperature of the cathode ray tube's luminous body or the temperature at which the cathode ray tube is thermally destroyed (usually 100 to 150 degrees Celsius). Can be input. As the cooling liquid, an inexpensive aqueous liquid with low viscosity (such as ethylene glycol containing 5 to 50 weight percent water) can be used, so that a cathode ray tube device with high brightness can be realized. Furthermore, since a high refractive index liquid (such as glycerin) can be used as the liquid, a high resolution cathode ray tube projection device can be realized.
従来、４−メチルペンテン重合体で形成した入射レンズ
が使用されなかったのは、該素材は、形状保持温度は高
いが、Ａ８ＴＭで規定される熱変形温度が比較的低（（
９０℃前後）、しかも成形後使用環境において変形する
為、所要のレンズ精度が維持℃きなかりた為と思われる
。前者に対しては応力がかからないような構造とするこ
と、後者に対しては、使用環境温度以上で予じめアニー
ルしておくことにより対処している為、長時間正常に動
作する。Conventionally, an entrance lens made of 4-methylpentene polymer has not been used because this material has a high shape retention temperature but a relatively low heat distortion temperature specified by A8TM ((
This seems to be because the required lens precision could not be maintained because the lens was deformed in the usage environment after molding (around 90°C). The former is addressed by creating a structure that does not apply stress, and the latter is addressed by pre-annealing at a temperature higher than the usage environment temperature, so that it can operate normally for a long time.
以下１本発明の一実施例を図により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
図は本発明による陰極線管投写装置の要部を示す断面図
である。図において、１は陰極線管筐体、２は陰極線管
前面パネル、６は結合０部材、４は入射レンズ、５はＯ
リング、６，７は他のレンズエレメント、８は該レンズ
エレメント６．７を保持する中鏡胴、９は該中鏡胴８が
摺動可能に納められた外鏡胴、１１１冷却液、１１は他
の０リング、１２は螢光体である。結合部材３は、０リ
ング５を介して公知の手段により陰極線管筺体１に取り
付けられる。凹形状レンズ４は、０リング１１を介して
、公知の手段により結合部材３と固着された外鏡胴９に
よって押圧・取り付けられ、冷却液１０が入る空隙が形
成されている。結合部材３には、弾性部材で構成された
液圧補償部１３が設けられる。The figure is a sectional view showing essential parts of a cathode ray tube projection device according to the present invention. In the figure, 1 is the cathode ray tube housing, 2 is the front panel of the cathode ray tube, 6 is the coupling member, 4 is the incident lens, and 5 is the O
rings, 6 and 7 are other lens elements; 8 is a middle lens barrel that holds the lens element 6.7; 9 is an outer barrel in which the middle lens barrel 8 is slidably housed; 111 is a cooling liquid; is another 0 ring, and 12 is a phosphor. The coupling member 3 is attached to the cathode ray tube housing 1 via an O-ring 5 by known means. The concave lens 4 is pressed and attached via an O-ring 11 by an outer lens barrel 9 that is fixed to the coupling member 3 by known means, and a gap is formed into which a cooling liquid 10 can enter. The coupling member 3 is provided with a hydraulic pressure compensator 13 made of an elastic member.
入射レンズ４を４−メチルペンテン重合体で形成し、冷
却液として蒸留水２０重量部とエチレングリコール８０
重量部の混合液を使用した。４−メチルペンテン重合体
の入射レンズ４は、公知の射出成形（シリンダ温度２９
０℃、金型温度７０℃）した後、１５０℃炉で７２時間
アニールしたものを用いた。入射レンズ４は該アニール
した後所要形状になるよう成形したものである。その結
果、陰極線管前面パネル２の温度１１０℃、冷却液１０
の温度８０〜１００℃（部分により異なる）＆Ｃなる高
輝度投写条件で２１旬時間連続試験、−１０℃に１２時
間放置した後、１１０℃に１２時間放置することを１？
イクルとする１２０サイクルの冷熱試験、６０℃、相対
湿度９５％の高温高湿度条件下に２１６０時間放置する
試験のいずれの試験においても何ら異常は認められなか
った。The entrance lens 4 is formed of a 4-methylpentene polymer, and 20 parts by weight of distilled water and 80 parts by weight of ethylene glycol are used as a cooling liquid.
A mixture of parts by weight was used. The entrance lens 4 of 4-methylpentene polymer is manufactured by known injection molding (cylinder temperature 29
0° C., mold temperature 70° C.), and then annealed in a 150° C. furnace for 72 hours. The entrance lens 4 is formed into a desired shape after the annealing. As a result, the temperature of the cathode ray tube front panel 2 was 110°C, and the cooling liquid was 10°C.
Continuous test for 21 hours under high brightness projection conditions at a temperature of 80 to 100℃ (varies depending on the part) &C.
No abnormalities were observed in any of the 120-cycle thermal and thermal tests, and the test in which the product was left for 2,160 hours under high-temperature, high-humidity conditions of 60° C. and 95% relative humidity.
一方、上記実施例において、液圧補償部１３を設けなか
った場合、上記試験で解像度の劣化が認められた。アニ
ールを実施しない入射レンズ４を使用した場合も、同様
に、上記試験で解像度の劣化が認められた。これら解像
度の劣化が認められた陰極線管投写装置を分解測定した
ところ、レンズ面精度が１００〜３０００ ｓｎ劣化し
ていることが判った。On the other hand, in the above embodiment, when the hydraulic pressure compensator 13 was not provided, deterioration of resolution was observed in the above test. Even when the incident lens 4 that was not annealed was used, deterioration in resolution was similarly observed in the above test. When these cathode ray tube projection devices in which deterioration in resolution was observed were disassembled and measured, it was found that the lens surface precision had deteriorated by 100 to 3000 sn.
冷却液１０としては、上記実施例の混合液の他に、沸点
（陰極線管最高温度１００’Ｃ以上）、凝固点（保存、
這般中を含めて一１０℃以下、好ましくは一３０℃以下
）で透明、散乱光を生じない使用温度で低粘度（冷却特
性の為）の液であれば良く、レンズ形状設計上からは、
屈折率が高い液が望まれる。その他、不燃又は難燃、無
毒性、低価格、接触部材（陰極線管前面パネル：ガラス
、結合部材ニアルミ、入射レンズ：４−メチルペンテン
重合体・０リング：フッ素ゴム等）への影響を考慮して
選定される。In addition to the mixed liquid of the above embodiment, the cooling liquid 10 may have a boiling point (maximum cathode ray tube temperature of 100'C or more), freezing point (storage,
It is sufficient that the liquid is transparent at temperatures below -10℃, preferably below -30℃, including during cooling, and has low viscosity (due to its cooling properties) at the operating temperature that does not produce scattered light, and from the viewpoint of lens shape design. ,
A liquid with a high refractive index is desired. Other considerations include non-flammability or flame retardancy, non-toxicity, low cost, and impact on contact materials (cathode ray tube front panel: glass, bonding material Ni-aluminum, entrance lens: 4-methylpentene polymer, O-ring: fluororubber, etc.). Selected based on
本発明によれば、入射レンズの耐熱性からくる温度の制
限が除かれるので陰極線管への高入力が可能になり高輝
度の陰極線管装置を、入射レンズ面からの透水及び入射
レンズの変形が防止される為、高信頼（長寿命）、高性
能に、また水系冷却液が使用可能になり安価に実現する
ことができる。According to the present invention, since the temperature limit due to the heat resistance of the input lens is removed, a high input to the cathode ray tube is possible, and a high brightness cathode ray tube device can be operated without water permeation from the input lens surface and deformation of the input lens. Since this is prevented, high reliability (long life) and high performance can be achieved, and water-based coolants can be used at low cost.
図は、本発明の一実施例の要部断面図を示す。 １・・・・・・・陰極線管体筐体、 ２・・・・・・・陰極線管前面パネル。 ３・・・・・・・結合部材、 ４・・・・・・・入射レンズ、 １０・・・・・・・冷却液。 １３・・・・・・・液圧補償部、 １４・・・・・・・弾性体。 The figure shows a sectional view of essential parts of an embodiment of the present invention. 1...Cathode ray tube housing, 2...Cathode ray tube front panel. 3......Connection member, 4...Incidence lens, 10... Cooling liquid. 13...Fluid pressure compensation section, 14...Elastic body.
Claims (1)
する位置に投写レンズ系を構成するレンズ玉のうちの入
射レンズが設けられ、該入射レンズと上記前面パネルと
の間に液密に保持された密閉室が設けられ、該密閉室に
５重量％以上の水を含有する液体が封入されてなる液冷
式の陰極線管投写装置において、該入射レンズが４−メ
チルペンテン重合体であることを特徴とする陰極線管投
写装置。1. An input lens of the lens balls constituting the projection lens system is provided at a position facing the front panel of the cathode ray tube with a required distance therebetween, and a liquid-tight gap is provided between the input lens and the front panel. A liquid-cooled cathode ray tube projection device comprising a sealed chamber in which a liquid containing 5% by weight or more of water is sealed, wherein the incident lens is a 4-methylpentene polymer. A cathode ray tube projection device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62326969A JPH01170177A (en) | 1987-12-25 | 1987-12-25 | Cathode ray tube projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62326969A JPH01170177A (en) | 1987-12-25 | 1987-12-25 | Cathode ray tube projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01170177A true JPH01170177A (en) | 1989-07-05 |
Family
ID=18193818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62326969A Pending JPH01170177A (en) | 1987-12-25 | 1987-12-25 | Cathode ray tube projector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01170177A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511143U (en) * | 1991-07-25 | 1993-02-12 | 松下電器産業株式会社 | Projection television receiver |
| JP2006525547A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2007275350A (en) * | 2006-04-07 | 2007-10-25 | Yoko Saito | Drug taking tool and wrapping device |
-
1987
- 1987-12-25 JP JP62326969A patent/JPH01170177A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511143U (en) * | 1991-07-25 | 1993-02-12 | 松下電器産業株式会社 | Projection television receiver |
| JP2006525547A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2007275350A (en) * | 2006-04-07 | 2007-10-25 | Yoko Saito | Drug taking tool and wrapping device |
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