JPH0349382A - Projection television receiver - Google Patents
Projection television receiverInfo
- Publication number
- JPH0349382A JPH0349382A JP1185166A JP18516689A JPH0349382A JP H0349382 A JPH0349382 A JP H0349382A JP 1185166 A JP1185166 A JP 1185166A JP 18516689 A JP18516689 A JP 18516689A JP H0349382 A JPH0349382 A JP H0349382A
- Authority
- JP
- Japan
- Prior art keywords
- ray tube
- projection
- glycerin
- liquid
- television receiver
- 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
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 62
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 235000011187 glycerol Nutrition 0.000 claims description 26
- 239000011259 mixed solution Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 abstract description 26
- 238000004040 coloring Methods 0.000 abstract description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract 1
- 239000005977 Ethylene Substances 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- 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】
［発明の目的］
（産業上の利用分野）
本発明は投写形テレビジョン受像装置に係り、特にブラ
ウン管と投写レンズ系との間に、レンズに近い光屈折率
を有する無色透明な液体から成る充填材を充填した結合
用筺体を配設し、前記ブラウン管の映像面と投写レンズ
系とが光学的に結合されるようにした投写形テレビジョ
ン受像装置に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a projection type television receiver, and in particular, a projection type television receiver having an optical refractive index close to that of the lens between a cathode ray tube and a projection lens system. The present invention relates to a projection television receiver, which is provided with a coupling housing filled with a filler made of a colorless and transparent liquid, so that the image plane of the cathode ray tube and the projection lens system are optically coupled.
（従来の技術）
投写形テレビジョン受像装置にあっては、ブラウン管の
映像面に受信画像を再生すると共に、この映像面の映像
を、前記ブラウン管の直前に配設した投写レンズ系によ
って拡大し、これをスクリーン上に投写し、スクリーン
上に投写された受信映像を見るようにしている。(Prior Art) In a projection type television receiver, a received image is reproduced on the image plane of a cathode ray tube, and the image on this image plane is enlarged by a projection lens system disposed immediately in front of the cathode ray tube. This is projected onto a screen, and the received image projected onto the screen is viewed.
このような投写形テレビジョン受像５Ａ置は、スクリー
ンの前面からスクリーン上に投写された映像を反射光と
して見るフロントタイプと、スクリーンの背面から投写
された映像を見るリアタイプとがある。このリアタイプ
の投写形テレビジョン受像装置は、ブラウン管から投写
レンズ系を介して取り出した映像を反射ミラーによって
反射させ、スクリーンの背面に結像さＶるように構成し
ている。このような投写形テレビジョン受像装置におい
て重要なことは、投写画面のコントラスト比を向上させ
ることである。このコントラスト比を向上させるために
、ブラウン管の受像面と投写レンズ系との間に、光屈折
率がレンズ等と近く且つ無色透明の液体から成る充填材
を充填した結合用筺体を配設し、ブラウン管映像面の映
像光が、前記充填材を通して投写レンズ系に導出される
ようにしている。Such a projection television receiver 5A has a front type in which the image projected onto the screen is viewed from the front of the screen as reflected light, and a rear type in which the image projected from the back of the screen is viewed. This rear-type projection television receiver is configured so that an image taken out from a cathode ray tube through a projection lens system is reflected by a reflecting mirror, and an image is formed on the back side of a screen. What is important in such a projection television receiver is to improve the contrast ratio of the projection screen. In order to improve this contrast ratio, a coupling housing filled with a filler made of a colorless and transparent liquid whose optical refractive index is close to that of the lens, etc. is disposed between the image receiving surface of the cathode ray tube and the projection lens system. Image light on the image plane of the cathode ray tube is guided to the projection lens system through the filling material.
従来、上記のような映像光を投写レンズ系に光学的に結
合づる充填材として、特開昭６２−３５４２８号公報に
示されるニブレンゲリコール８０〜６０＠鯖％と、グリ
セリン２０〜４１！１％との混合溶液が知られている。Conventionally, as a filler for optically coupling the above-mentioned image light to a projection lens system, nibrene gellicol 80-60 @ mackerel % and glycerin 20-41! A mixed solution with % is known.
充填材としてこのような混合溶液を用いると、溶液とブ
ラウン管、及び溶液と投写レンズの各境界面で光反射率
が小さくなり画面のコントラスト比を上げることができ
ると共に、溶液の蒸発醋も小さく蒸気圧も小ざいので、
４度上昇によってブラウン管等を破損する虞れもなく、
しかもプラスチックレンズを使用し溶液と接触させるこ
とができる利点がある。When such a mixed solution is used as a filler, the light reflectance is reduced at each interface between the solution and the cathode ray tube, and between the solution and the projection lens, thereby increasing the contrast ratio of the screen. The pressure is also small, so
There is no risk of damaging cathode ray tubes, etc. due to a 4 degree rise.
Moreover, there is the advantage that a plastic lens can be used and brought into contact with the solution.
しかしながら、エチレングリコールに対して混合づるグ
リセリンの量が多くなると、グリセリンに基づく不具合
が生ずる。即ち、グリセリンはエチレングリコールに比
べ熱劣化が速く、グリセリン債が多いと、熱による着色
を生じやずい。また、グリセリンの粘度はエチレングリ
コールのぞれよりも高く、グリセリン胎が多いと、液体
の混合、注入、及び脱泡の作業が難しくなる共に、液体
が対流しにくく冷却効果が減少する。更に、グリセリン
の価格はエチレングリコールの約２倍あり、グリセリン
口が多いと、コスト的に不利になる。However, when the amount of glycerin mixed with ethylene glycol increases, problems due to glycerin occur. That is, glycerin deteriorates faster than ethylene glycol due to heat, and if there is a large amount of glycerin, coloring is less likely to occur due to heat. Furthermore, the viscosity of glycerin is higher than that of ethylene glycol, and if there is a large amount of glycerin, it becomes difficult to mix, inject, and defoam the liquid, and the liquid becomes difficult to convect, reducing the cooling effect. Furthermore, the price of glycerin is about twice that of ethylene glycol, and if there are many glycerin units, it will be disadvantageous in terms of cost.
（発明が解決しようとする課題）
上記の如く、充填材として使用される従来例のエチレン
グリコールとグリセリンの混合溶液（特開昭６２−３５
４２８号公報に示されるエチレングリコール８０〜６０
％とグリセリン２０〜４０％との混合溶液）においては
、液体の熱劣化による着色に対する信頼性の低下、液体
の混合。(Problem to be Solved by the Invention) As mentioned above, the conventional mixed solution of ethylene glycol and glycerin used as a filler (Japanese Patent Laid-Open No. 62-35
Ethylene glycol 80 to 60 shown in Publication No. 428
% and 20-40% glycerin), the reliability of coloring due to thermal deterioration of the liquid decreases, and the mixing of the liquid.
注入、及θ脱泡の作業性が悪い、冷却効果が上がらない
、コスト的に不利であるなどの問題があった。There were problems such as poor workability in injection, θ defoaming, poor cooling effect, and disadvantages in terms of cost.
そこで、本発明は上記の問題を除去するためのもので、
従来例の混合溶液に対し、液体の熱劣化による着色に対
する信頼性の向上、液体の混合。Therefore, the present invention is intended to eliminate the above problems.
Improved reliability against coloring due to thermal deterioration of liquids and mixing of liquids compared to conventional mixed solutions.
注入、及び脱泡の工程における作業性の向上、冷却効果
の向上、コスト的な有利性を図ることができる投写形テ
レビジョン受像装置を提供することを目的とするもので
ある。It is an object of the present invention to provide a projection type television receiver that can improve workability in the injection and defoaming steps, improve the cooling effect, and be advantageous in terms of cost.
［発明の構成］
（課題を解決するための手段）
本発明の投写形テレビジョン受像装置では、ブラウン管
と投写レンズ間に充填する充填材として、エチレングリ
コール９５〜８１重置％とグリセリン５〜１９重量％と
の混合溶液を用いることを特徴とＪるものである。[Structure of the Invention] (Means for Solving the Problems) In the projection type television receiver of the present invention, 95 to 81% of ethylene glycol and 5 to 19% of glycerin are used as a filler to be filled between the cathode ray tube and the projection lens. It is characterized by using a mixed solution with % by weight.
（作用）
本発明においては、エチレングリコールに対し、グリセ
リンの混合比率を減少させ、５〜１９重量％としている
。グリセリンの混合比率を減少させることは、混合溶液
の粘度を低くできるため、液体の混合、注入、及び脱泡
の］−程における作業性を向上し工程の時間短縮を図る
ことができ、また液体の対流がしやすくなるため冷却効
果を向上させることができる。更に、グリセリンの熱安
定性はかなり悪いため、グリセリンｈ１の減少により熱
劣化に対する信頼性を向上できると共に、コスト的にも
右利となる。(Function) In the present invention, the mixing ratio of glycerin to ethylene glycol is reduced to 5 to 19% by weight. Reducing the mixing ratio of glycerin can lower the viscosity of the mixed solution, improving workability and shortening process time during liquid mixing, injection, and defoaming steps. Since convection becomes easier, the cooling effect can be improved. Furthermore, since the thermal stability of glycerin is quite poor, reducing the amount of glycerin h1 not only improves reliability against thermal deterioration but also has cost advantages.
（実施例）
以下、図面に示した実施例に基づいて本発明を説明する
。(Example) The present invention will be described below based on the example shown in the drawings.
第１図は本発明の一実施例の投写形テレビジョン受像装
置の映像投写部を示づ断面図で、第２図は投写形テレビ
ジョン受！＆装置の構成図である。FIG. 1 is a sectional view showing a video projection section of a projection television receiver according to an embodiment of the present invention, and FIG. 2 is a sectional view of a projection television receiver according to an embodiment of the present invention. & It is a configuration diagram of the device.
第２図はリアタイプのテレビジョン受ｆＩＩ装置を示す
もので、図中１０はキャビネットで、その内部には映像
投写部１１が設置される。この映像投写部１１は受信映
像を映し出すと共に、その受信映像を拡大して、これを
反射ミラー１２に投写する。この映像投写部１０により
映像が投写された反射ミラー１１は、その映像をキャビ
ネット１２の前面に設けられたスクリーン１３に背面よ
り結像する。FIG. 2 shows a rear-type television reception fII device, in which reference numeral 10 denotes a cabinet, inside which a video projection section 11 is installed. The image projection unit 11 projects the received image, enlarges the received image, and projects it onto the reflecting mirror 12. The reflecting mirror 11 onto which the image is projected by the image projection unit 10 forms an image of the image on a screen 13 provided at the front of the cabinet 12 from the back side.
上記映像投写部１１は第１図に示すように、受信映像を
映し出すブラウン管２０の映像面に対応してＰＭＭＡ樹
脂等で形成される投写レンズ系２１が所定の間隔を有し
て対向配置される。そして、これらブラウン管２０と投
写レンズ系２１の中間部にはアルミダイキャスト等で形
成される結合用筺体２２が配置される。この筺体２２の
一端には７ランジ２２ａが形成され、このフランジ部２
２ａはブラウン管２０の背面部に設けられた固定７ラン
ジ２０ａと螺子部材２３及びバッキング２４等を介して
螺着されて密閉構造に結合される。As shown in FIG. 1, the image projection unit 11 has a projection lens system 21 formed of PMMA resin or the like arranged facing the image surface of a cathode ray tube 20 with a predetermined interval in correspondence with the image surface of a cathode ray tube 20 that projects the received image. . A coupling casing 22 made of die-cast aluminum or the like is disposed between the cathode ray tube 20 and the projection lens system 21. A seven flange 22a is formed at one end of this housing 22, and this flange portion 2
2a is screwed to a fixed 7 flange 20a provided on the back surface of the cathode ray tube 20 via a screw member 23, a backing 24, etc., and is connected to a sealed structure.
また、筺体２２の他端には同様に７ランジ２２ｂが形成
され、このフランジ２２ｂは上記投写レンズ系２１の収
容される筒体２５に設けられた固定７ランジ２５ａと螺
子部材２６及びバッキング２７等を介して螺着されて密
閉構造に結合される。Further, a seven flange 22b is similarly formed at the other end of the housing 22, and this flange 22b connects to a fixed seven flange 25a provided on the cylinder body 25 in which the projection lens system 21 is accommodated, a screw member 26, a backing 27, etc. It is connected to the closed structure by screwing it through.
このように両端部を密閉構造でブラウン管２０及び投写
レンズ系２１に結合された結合用筺体２２の内部には、
エチレングリコール９５〜８１重量％とグリセリン５〜
１９重量％との混合溶液による充填材となる液体２８を
完成する。また、この結合用筺体２２の側部の一部には
、外部に向けて開口部３１が形成され、この開口部３１
は例えばシリコーンゴム等による圧力調整弁３１ａによ
って封じられている。この圧力調整弁３１ａ＄よ、例え
ば通電時に密閉収納された液体２８が発熱によって体積
屈服したとき、内部圧力を吸収するために設定される。In this way, inside the coupling housing 22, which is coupled to the cathode ray tube 20 and the projection lens system 21 with both ends sealed, there are:
Ethylene glycol 95-81% by weight and glycerin 5-5%
A liquid 28 serving as a filler is completed by a mixed solution with 19% by weight. Further, an opening 31 is formed toward the outside in a part of the side portion of the coupling casing 22, and this opening 31
is sealed by a pressure regulating valve 31a made of, for example, silicone rubber. This pressure regulating valve 31a$ is set to absorb internal pressure, for example, when the liquid 28, which is sealed and housed during energization, undergoes volumetric collapse due to heat generation.
上記のように、本発明にあっては、充填材としてエチレ
ングリコール９５〜８１車量％とグリセリン５〜１９重
量％との混合溶液を使用している。As mentioned above, in the present invention, a mixed solution of 95 to 81% by weight of ethylene glycol and 5 to 19% by weight of glycerin is used as the filler.
これにより、従来、知られているエチレングリコール８
０〜６０重量％とグリセリン２０〜４０重量％から成る
混合溶液に比べ、本発明では以下に示すような効果を生
ずる。As a result, the conventionally known ethylene glycol 8
Compared to a mixed solution consisting of 0 to 60% by weight and 20 to 40% by weight of glycerin, the present invention produces the following effects.
まず、第１に、液体の熱劣化に伴う着色についての信頼
性の向上を図ることができることである。First, it is possible to improve the reliability of coloring due to thermal deterioration of the liquid.
一般に、グリコール類の液体は熱劣化により、だんだん
黄褐色に着色してくる。これは、液体の透過率の低下と
なり、投写形テレビジョン受像機の映像の明るさに関し
て、長期間使用した場合にその信頼性が聞題となる。Generally, glycol liquids gradually turn yellowish brown due to thermal deterioration. This results in a decrease in the transmittance of the liquid, and with regard to the brightness of the image of the projection television receiver, its reliability becomes a question when used for a long period of time.
第１表はエチレングリコール、グリセリン、及びその混
合溶液についての、熱劣化による着色性の実験結果を示
す。Table 1 shows the experimental results of coloring properties due to thermal deterioration of ethylene glycol, glycerin, and mixed solutions thereof.
第１表
上表の実験データからも明らかなように、グリセリンの
方がエチレングリコールよりも熱劣化がかなり早い。従
って、グリセリン量の少ない本発明の方が従来組成のも
のに比し、熱劣化による着色の点′Ｃ′優れている。As is clear from the experimental data shown in Table 1, glycerin deteriorates considerably faster than ethylene glycol. Therefore, the composition of the present invention containing a small amount of glycerin is superior to the composition of the conventional composition in terms of coloration caused by thermal deterioration 'C'.
第２に、液体の混合・注入・脱泡の工程の時間短縮を図
ることができることである。エチレングリコールの粘度
が２５ＣＰ （２０℃）であるのに対し、グリセリンの
粘度は１４９９ｃＰ （２０℃）とかなり高い。従って
、グリセリンの混合比率を減少させることは、混合溶液
の粘度を従来に比し、低粘度にできるため、液体の混合
、注入１．脱泡の作業が容易となり、それぞれの作業時
間を短縮することが可能となる。Second, it is possible to shorten the time required for liquid mixing, injection, and defoaming processes. Ethylene glycol has a viscosity of 25 CP (20° C.), while glycerin has a considerably higher viscosity of 1499 cP (20° C.). Therefore, by reducing the mixing ratio of glycerin, the viscosity of the mixed solution can be made lower than that of the conventional method, so it is possible to reduce the viscosity of the mixed solution. The defoaming work becomes easier and the time required for each work can be shortened.
第３に、冷却効果の向上を図ることがでさ・ることであ
る。前述したように、混合溶液の粘度が従来に比べ低粘
度であることにより、ブラウン恰２０フェース面の発熱
時に、液体の対流が従来に比べて容易となるため、その
冷却効果が向上する。Thirdly, it is difficult to improve the cooling effect. As described above, since the viscosity of the mixed solution is lower than in the past, when the Braun 20 face generates heat, liquid convection becomes easier than in the past, and the cooling effect is improved.
第４に、製造コストを低減できることである。Fourthly, manufacturing costs can be reduced.
グリセリンの価格はエチレングリコールの約２＋８であ
り、グリセリンの混合比率を低下させることは材料費の
低下となり、また前述したように液体の混合等の作業工
程の時間短縮が可能となり、加工費の低減化を図ること
ができる。The price of glycerin is about 2 + 8 that of ethylene glycol, and lowering the mixing ratio of glycerin reduces material costs, and as mentioned above, it is possible to shorten the time of work processes such as mixing liquids, reducing processing costs. It is possible to aim for
第５に、光屈折率及び耐寒性についても、実用上問題が
ないことである。Fifth, there are no practical problems with respect to optical refractive index and cold resistance.
第２表は従来例−（エチレングリコール８０重間％とグ
リセリン２０重量％の混合溶液）と本発明実施例の混合
溶液（３種類について示す）について、光屈折率と、低
温（−４０，−５０℃）における粘性を測定した結果を
示す。Table 2 shows the optical refractive index and low temperature (-40, - The results of measuring the viscosity at 50° C. are shown below.
第２表 但し、Ｏは液状、Δは水あめ状を意味する。Table 2 However, O means liquid and Δ means starch syrup.
上表の測定結果から明らかなように、光屈折率は従来例
とほぼ同等であり、また耐寒性は従来例に比べ若干劣る
が、−４０℃で液状であり、−５０℃でも固化はしない
ことにより、投写形テレビジョン受像機の用途としては
実使用上問題を生じない。As is clear from the measurement results in the table above, the optical refractive index is almost the same as the conventional example, and the cold resistance is slightly inferior to the conventional example, but it is liquid at -40℃ and does not solidify even at -50℃. Therefore, there is no problem in actual use of the projection television receiver.
［発明の効果］
以上述べたように本発明によれば、従来例の混合溶液に
対し、液体の熱劣化による着色に対づる信頼性の向上、
液体の混合、注入、及び脱泡の工程における作業性の向
上、冷却効果の向上、コスト的な有利性を図ることが可
能となる。[Effects of the Invention] As described above, according to the present invention, reliability against coloring due to thermal deterioration of the liquid is improved compared to the conventional mixed solution.
It is possible to improve workability in the liquid mixing, injection, and defoaming processes, to improve the cooling effect, and to achieve cost advantages.
第１図は本発明の一実施例の投写形テレビジョン受像装
置の映像投写部を示す断面図、第２図は投写形テレビジ
ョン受像装置の構成図である。
１１・・・映像投写部、２０・・・ブラウン管、２１・
・・投写レンズ系、２２・・・結合用筺体、２８・・・
液体。FIG. 1 is a sectional view showing a video projection section of a projection television receiver according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of the projection television receiver. 11... Image projection section, 20... Braun tube, 21.
...Projection lens system, 22...Combination housing, 28...
liquid.
Claims (1)
に対向設定され前記ブラウン管の映像をスクリーン面に
投写する投写レンズ系と、内部に充填材を充填して前記
ブラウン管と前記投写レンズ系とを光学的に結合する結
合用筺体を備えた投写形テレビジョン受像装置において
、 前記充填材は、エチレングリコール９５〜８１重量％と
グリセリン５〜１９重量％との混合溶液であることを特
徴とする投写形テレビジョン受像装置。[Scope of Claims] A cathode ray tube for reproducing images, a projection lens system that is set opposite to the image surface of the cathode ray tube and projects the image of the cathode ray tube onto a screen surface, and a projection lens system that is filled with a filler and that is connected to the cathode ray tube and the projection lens system. In a projection television receiver equipped with a coupling housing for optically coupling a lens system, the filler is a mixed solution of 95 to 81% by weight of ethylene glycol and 5 to 19% by weight of glycerin. Features of a projection television receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18516689A JP3021473B2 (en) | 1989-07-17 | 1989-07-17 | Projection television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18516689A JP3021473B2 (en) | 1989-07-17 | 1989-07-17 | Projection television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0349382A true JPH0349382A (en) | 1991-03-04 |
| JP3021473B2 JP3021473B2 (en) | 2000-03-15 |
Family
ID=16165987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18516689A Expired - Fee Related JP3021473B2 (en) | 1989-07-17 | 1989-07-17 | Projection television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3021473B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297699A (en) * | 2000-04-17 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Method and device for producing liquid-cooled cathode- ray tube |
-
1989
- 1989-07-17 JP JP18516689A patent/JP3021473B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297699A (en) * | 2000-04-17 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Method and device for producing liquid-cooled cathode- ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3021473B2 (en) | 2000-03-15 |
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