JPS6329374B2 - - Google Patents
Info
- Publication number
- JPS6329374B2 JPS6329374B2 JP54033305A JP3330579A JPS6329374B2 JP S6329374 B2 JPS6329374 B2 JP S6329374B2 JP 54033305 A JP54033305 A JP 54033305A JP 3330579 A JP3330579 A JP 3330579A JP S6329374 B2 JPS6329374 B2 JP S6329374B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- absorbing material
- film
- black matrix
- material layer
- 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
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 34
- 239000011159 matrix material Substances 0.000 claims description 18
- 239000011358 absorbing material Substances 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000049 pigment Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- BIVUUOPIAYRCAP-UHFFFAOYSA-N aminoazanium;chloride Chemical compound Cl.NN BIVUUOPIAYRCAP-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
本発明はカラー受像管、とくにその蛍光面に係
るもので、外光の蛍光面による反射を著しく低減
し高照明下でも色再現範囲の縮小が小さく、いわ
ゆるコントラストの大きい新規な蛍光面を有する
カラー受像管を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color picture tube, particularly its phosphor screen, which significantly reduces the reflection of external light on the phosphor screen, reduces the reduction in color reproduction range even under high illumination, and provides so-called high contrast. A color picture tube having a novel phosphor screen is provided.
一般に、カラー受像管蛍光面としてコントラス
トを大きくするため従来から多くの試みがあり、
例えばパネルガラスの透過率を小さくしたり、蛍
光体ドツト又はストライプの間隙を光吸収物質例
えば黒鉛などで埋めたブラツクマトリツクス方
式、さらには、蛍光体の反射率はかなり高いので
蛍光体自体もしくは蛍光体の前面側に顔料を付着
させて発光色のみを通し外光の一部を吸収させる
顔料付き蛍光面などが提案されてきた。その発展
の経緯をまとめると、例えばフエースプレートの
透過率を下げれば同時にカラー受像管として非常
に重要な特性である蛍光面輝度も下つてしまう。 In general, there have been many attempts to increase the contrast of color picture tube fluorescent screens.
For example, it is possible to reduce the transmittance of the panel glass, or to use a black matrix method in which the gaps between phosphor dots or stripes are filled with a light-absorbing material such as graphite. Pigmented phosphor screens have been proposed in which pigments are attached to the front side of the body to allow only the emitted color to pass through and absorb some of the external light. To summarize the history of its development, for example, if the transmittance of the face plate is lowered, the luminance of the phosphor screen, which is a very important characteristic for a color picture tube, will also be lowered.
従つてその対策として蛍光面の反射率を光吸収
物質の導入で下げパネル透過率は下げない方式の
ブラツクマトリツクス形カラー受像管（以下BM
形カラー受像管という）が提供された。しかしこ
のBM形カラー受像管も蛍光体層の部分の反射率
は高いためコントラストの点でまだ充分ではなか
つた。この改善策として輝度の若干の低下を承知
でさらに蛍光面反射率を輝度低下以下に下げるた
め顔料付き蛍光面がブラツクマトリツクス方式と
ともに実用されてきた。ところが、この顔料付き
蛍光面も前述したように輝度低下はさけられない
という欠点をもつていた。 Therefore, as a countermeasure to this problem, we have developed a black matrix color picture tube (hereinafter referred to as BM), which lowers the reflectance of the phosphor screen by introducing a light-absorbing substance without reducing the panel transmittance.
color picture tube) was provided. However, this BM type color picture tube also had a high reflectance in the phosphor layer, so the contrast was still not sufficient. As a countermeasure to this problem, a pigmented phosphor screen has been put into practical use along with a black matrix system in order to further reduce the reflectance of the phosphor screen to a level below the reduction in brightness, even though the brightness may be slightly lowered. However, this pigmented phosphor screen also has the drawback of an unavoidable reduction in brightness, as described above.
第１図は従来のストライプ形のBM形カラー受
像管の一例の蛍光面の断面模式図であり、図にお
いて１はパネルガラス、２は光吸収物質層（以下
BM膜という）、３ｇ，３ｂ，３ｒはそれぞれ緑、
青、赤に発光する蛍光体層、４は蛍光体層３の背
面に形成された金属反射膜、５は光吸収物質の塗
布されていないブラツクマトリツクス窓で、この
窓５を埋めるように前記蛍光体層３が被着されて
おり、かつこの蛍光体層３は前記BM膜２の背面
にまで延在している。 Figure 1 is a schematic cross-sectional view of the phosphor screen of an example of a conventional striped BM color picture tube.
BM membrane), 3g, 3b, and 3r are green, respectively.
A phosphor layer that emits blue and red light; 4 is a metal reflective film formed on the back surface of the phosphor layer 3; 5 is a black matrix window on which no light-absorbing substance is coated; A phosphor layer 3 is applied, and this phosphor layer 3 extends to the back side of the BM film 2.
このような構造の蛍光面において、外光l1は
BM膜２で吸収されるが、別の外光l2はブラツク
マトリツクス窓５の蛍光体層３で反射され、管面
反射率を大きくしている。 In a fluorescent screen with such a structure, external light l 1 is
Although it is absorbed by the BM film 2, other external light l2 is reflected by the phosphor layer 3 of the black matrix window 5, increasing the reflectance of the tube surface.
一方、各色の蛍光体としてそれぞれの発光色と
同色の顔料を表面に付着させた顔料付き蛍光体を
用いても、外光のスペクトルのうち少くとも顔料
と同色の光成分以外が吸収されるだけであり、さ
らに実際上分光透過率がシヤープな形をした理想
的な顔料物質がないため反射はかなり大きなもの
となり、例えばBM形カラー受像管の蛍光面反射
率に対し青、赤の２色の顔料を用いてもその反射
率は蛍光面輝度低下とのバランスを考えると実用
上、高高15％程低減できるに過ぎない。抜本的な
方法は、蛍光膜の高い反射率（〜85％）を汎色的
に大きく低減させることで、そのため黒鉛のよう
な光吸収物質を蛍光膜に混入する試みもあつた
が、輝度が著しく低下し実用上の価値を有するに
は至らなかつた。 On the other hand, even if a pigmented phosphor is used as a phosphor for each color, with a pigment of the same color as the respective emission color attached to the surface, only light components other than at least the same color as the pigment in the spectrum of external light will be absorbed. Furthermore, since there is no ideal pigment material with sharp spectral transmittance, the reflection becomes quite large. Even if a pigment is used, the reflectance can only be reduced by about 15% in practical terms, considering the balance with the reduction in luminance of the phosphor screen. A drastic method is to greatly reduce the high reflectance (~85%) of the fluorescent film in a panchromatic manner.There have also been attempts to mix light-absorbing substances such as graphite into the fluorescent film, but the brightness has decreased. It decreased significantly and did not have any practical value.
本発明は前述したような従来の種々の問題点を
解決し、従来の顔料付きBM形カラー受像管の蛍
光面よりもさらに反射率が低くコントラストの高
い、しかも明るい照明の下でも色再現性の高い良
質の画像を表示できる優れたBM形カラー受像管
を提供するものである。 The present invention solves the various problems of the conventional art as described above, and provides a material with lower reflectance and higher contrast than the fluorescent screen of the conventional pigmented BM type color picture tube, as well as improved color reproducibility even under bright lighting. This provides an excellent BM type color picture tube that can display high quality images.
以下、その内容を詳細に説明する。 The contents will be explained in detail below.
まず本発明者は、BM形カラー受像管の蛍光面
輝度向上に関する研究中、第２図に示すBM膜２
の背面後、すなわちBM膜２の電子銃側に反射膜
６を形成しておくと、従来までBM膜で吸収され
ていた蛍光体からの発光も反射膜６で反射され、
さらに蛍光体粒子、金属反射膜４で反射されるの
でその一部がブラツクマトリツクス窓５を通して
外部に出てくることになり、蛍光面輝度が向上す
ることを認めた。ところが、その場合例えばスト
ライプ状スクリーンでBM膜２の幅Ｗが大きいと
反射膜６による反射があつても膜内反射が多くな
るのでブラツクマトリツクス窓５を通して外部に
光が出てくる割合が減少し、反射膜６の効果は小
さくなる。従つて、BM膜２、反射膜６の幅は小
さいほど外部に光が容易にとり出せることに着目
し本発明は次のような蛍光面を考案した。すなわ
ち、第３図に本発明に係る一実施例の模式図を示
す。なお、第３図において第１図、第２図と同じ
部分には同一記号を付してある。図においてブラ
ツクマトリツクス窓５の部分に極めて微細な第２
の光吸収物質層１２を設け、さらにその背面側、
すなわち電子銃側に金属膜の如き反射膜１６を形
成したものである。前記第２の光吸収物質層１２
の形状は点状の独立したものとし、そのパターン
の一例の平面図を第４図に示す。 First, while researching on improving the luminance of the phosphor screen of a BM type color picture tube, the inventor discovered that the BM film 2 shown in FIG.
By forming a reflective film 6 behind the back surface of the BM film 2, that is, on the electron gun side of the BM film 2, the light emitted from the phosphor, which was conventionally absorbed by the BM film, is also reflected by the reflective film 6.
Furthermore, since the phosphor particles are reflected by the metal reflective film 4, some of them come out through the black matrix window 5, and it has been found that the brightness of the phosphor screen is improved. However, in that case, for example, if the width W of the BM film 2 is large in a striped screen, even if there is reflection from the reflective film 6, there will be more reflection within the film, so the proportion of light coming out to the outside through the black matrix window 5 will decrease. However, the effect of the reflective film 6 becomes smaller. Therefore, the present invention devised the following phosphor screen, noting that the smaller the width of the BM film 2 and the reflective film 6, the easier light can be taken out to the outside. That is, FIG. 3 shows a schematic diagram of an embodiment according to the present invention. In FIG. 3, the same parts as in FIGS. 1 and 2 are given the same symbols. In the figure, there is an extremely fine second layer in the black matrix window 5.
A light-absorbing material layer 12 is provided, and furthermore, on the back side thereof,
That is, a reflective film 16 such as a metal film is formed on the electron gun side. the second light absorbing material layer 12
The shape is independent dots, and a plan view of an example of the pattern is shown in FIG.
このような構造にすると、外光はこれら第２の
光吸収物質層１２のパターンによつても吸収され
るので、結果的に蛍光面の反射率が低減すると共
に、蛍光膜からの発光はこれらパターン上の反射
膜６，１６により反射され、ブラツクマトリツク
ス窓５から外部へ出てくる。 With such a structure, external light is also absorbed by the patterns of the second light-absorbing material layer 12, resulting in a reduction in the reflectance of the phosphor screen and the light emitted from the phosphor film is absorbed by these patterns. The light is reflected by the reflective films 6 and 16 on the pattern and exits from the black matrix window 5.
しかも第２の光吸収物質層１２は点状でしかも
極めて小さいので、反射による発光の外部とり出
しが点状の全周に亘つて可能となることから、発
光の外部とり出し効果は大きく輝度の損失は反射
率の低減に比べ著しく小さいことが認められた。
すなわち、このような蛍光面で反射率が低くしか
も輝度低下のない高コントラストの画像が得られ
る。また、第５図は本発明の他の実施例を示す要
部断面図であり、第３図と同じものには同一記号
を付し、詳細な説明は省略する。第５図において
は、第３図の実施例とはBM膜２の背面の反射膜
６の構成が異なつている。すなわち、第５図に示
す実施例では反射膜６はブラツクマトリツクス窓
５寄りのBM膜２の端部のみに設けてあり、中心
部は除いた構成となつている。 Moreover, since the second light-absorbing material layer 12 is dot-like and extremely small, it is possible to take out the emitted light to the outside by reflection over the entire circumference of the dot-like shape, so the effect of taking out the emitted light to the outside is large and the brightness is greatly reduced. It was observed that the loss was significantly smaller than the reduction in reflectance.
That is, with such a phosphor screen, a high contrast image with low reflectance and no reduction in brightness can be obtained. Moreover, FIG. 5 is a sectional view of essential parts showing another embodiment of the present invention, and the same parts as in FIG. 3 are given the same symbols and detailed explanations are omitted. In FIG. 5, the structure of the reflective film 6 on the back surface of the BM film 2 is different from the embodiment shown in FIG. That is, in the embodiment shown in FIG. 5, the reflective film 6 is provided only at the end of the BM film 2 near the black matrix window 5, excluding the central part.
このような構成にすれば、混色対策に効果的で
ある。またこのようなパターンの形成は印刷方法
等で可能である。 Such a configuration is effective in preventing color mixture. Further, such a pattern can be formed by a printing method or the like.
以下具体例について説明する。 A specific example will be explained below.
パネルガラスの内面にホトレジスト水溶液例え
ばポリビニルアルコール1.5％水溶液に、重クロ
ム酸アンモニウムをポリビニルアルコールに対し
８％溶解した液を回転塗布し、乾燥する。次に、
シヤドウマスク例えばスロツトマスクに、大きさ
5μの黒点を全体の透過率が略50％になるよう均
一に透明プラスチツクシートに捺印したものを張
りつけ、この黒点付きプラスチツクシート付きシ
ヤドウマスクを介して上記のホトレジスト膜を露
光し、現像する。その結果、第４図のBM膜２と
第２の光吸収物質層１２に相当する部分のガラス
面が露出したストライプパターンが形成できる。
以下周知の方法で黒鉛懸濁液を塗布し乾燥後エツ
チングすることにより第４図に示したようなパタ
ーンからなるBM膜２と第２の光吸収物質層１２
とからなるブラツクマトリツクス膜が得られる。
その後塩化パラジウム0.02％、塩酸ヒドラジン
0.02％、塩酸0.2％の混合水溶液で前記ブラツク
マトリツクス膜表面のみを活性化する。これを水
洗後、塩化ニツケル３％、次亜燐ソーダ0.1％、
塩化アンモニウム５％、クエン酸ソーダ10％より
成る水溶液でブラツクマトリツクス膜表面にのみ
ニツケルを析出させ反射膜６，１６を形成する。
次に周知の方法で３色の蛍光体ストライプを形成
し、メタルバツクを経て管球製作工程に移し、フ
アンネル部との封着、電子銃封入等従来周知の方
法でBM形カラー受像管を製作した。 A photoresist aqueous solution, such as a 1.5% polyvinyl alcohol aqueous solution containing 8% ammonium dichromate dissolved in polyvinyl alcohol, is spin-coated onto the inner surface of the panel glass and dried. next,
Shadow mask, e.g. slot mask, size
A transparent plastic sheet with 5 μm black dots uniformly stamped on it so that the overall transmittance is about 50% is pasted on it, and the photoresist film is exposed to light through the shadow mask with the black dotted plastic sheet and developed. As a result, a stripe pattern can be formed in which the glass surface of the portion corresponding to the BM film 2 and the second light-absorbing material layer 12 shown in FIG. 4 is exposed.
The BM film 2 and the second light-absorbing material layer 12 having a pattern as shown in FIG.
A black matrix film consisting of is obtained.
Then palladium chloride 0.02%, hydrazine hydrochloride
Only the surface of the black matrix film is activated with a mixed aqueous solution of 0.02% and 0.2% hydrochloric acid. After washing this with water, nickel chloride 3%, hypophosphorous soda 0.1%,
Reflective films 6 and 16 are formed by depositing nickel only on the surface of the black matrix film using an aqueous solution consisting of 5% ammonium chloride and 10% sodium citrate.
Next, three-color phosphor stripes were formed using a well-known method, and the tube was transferred to the tube manufacturing process via a metal bag, and a BM-type color picture tube was manufactured using conventionally well-known methods such as sealing with the funnel and enclosing an electron gun. .
以上のようにして製作したBM形カラー受像管
の蛍光面は、従来の構造に比べ反射率で50％の低
減、明るさで僅か10％の低減となり、コントラス
トが70％向上した。 The phosphor screen of the BM type color picture tube manufactured as described above had a 50% reduction in reflectance, only a 10% reduction in brightness, and a 70% improvement in contrast compared to the conventional structure.
本発明による第２の光吸収物質層の形状として
は、第４図で例示した丸い点状のものに限られる
ものではなく、例えば多角形状などでもよく、ま
た、第１、第２の光吸収物質層の背面側の反射膜
６，１６は、具体例ではその全面に亘つてメツキ
によつて設けた構成としたが、例えば印刷の如き
手段によつて設けてもよいことはもちろんであ
る。また、本発明はドツトタイプのBM形カラー
受像管にも適用できることはもちろんである。 The shape of the second light-absorbing material layer according to the present invention is not limited to the round dot-like shape illustrated in FIG. 4, but may be polygonal, for example. In the specific example, the reflective films 6 and 16 on the back side of the material layer are provided by plating over the entire surface thereof, but it goes without saying that they may be provided by means such as printing. It goes without saying that the present invention can also be applied to a dot type BM color picture tube.
以上のように、本発明によれば従来技術では得
られない大きな画質の改善が可能であり、また製
造工程的にみてもなんら問題となるものはなく、
特性的にも経済的にも極めて優れたものである。 As described above, according to the present invention, it is possible to greatly improve the image quality that cannot be obtained with the conventional technology, and there is no problem in terms of the manufacturing process.
It is extremely excellent both in terms of characteristics and economically.
第１図および第２図は従来のBM形カラー受像
管の例を示す要部断面図、第３図および第５図は
本発明のBM形カラー受像管の実施例を示す要部
断面図、第４図は本発明の光吸収物質層の例を示
す平面図である。
１……パネル、２……BM膜、３……蛍光体
層、４……金属反射膜、５……ブラツクマトリツ
クス窓、６，１６……反射膜、１２……第２の光
吸収物質層。
1 and 2 are sectional views of main parts showing an example of a conventional BM type color picture tube, FIGS. 3 and 5 are sectional views of main parts showing an example of a BM type color picture tube of the present invention, FIG. 4 is a plan view showing an example of the light absorbing material layer of the present invention. 1... Panel, 2... BM film, 3... Phosphor layer, 4... Metal reflective film, 5... Black matrix window, 6, 16... Reflective film, 12... Second light absorbing material layer.
Claims (1)
ンの第１の光吸収物質層と、この第１の光吸収物
質層の被着されていないブラツクマトリツクス窓
部分に少なくともその一部が被着された蛍光体層
とを有するブラツクマトリツクス形カラー受像管
において、前記ブラツクマトリツクス窓部分で前
記蛍光体層が被着された部分の前記パネルガラス
内面に前記蛍光体層で覆われた多数の微細な点状
の第２の光吸収物質層を設けると共に、前記第１
および第２の光吸収物質層の背面側を光反射層と
したことを特徴とするカラー受像管。 ２ 前記第１の光吸収物質層の背面の光反射層
は、前記ブラツクマトリツクス窓部の縁部のみで
あることを特徴とする特許請求の範囲第１項記載
のカラー受像管。[Scope of Claims] 1. A first light-absorbing material layer with a predetermined pattern deposited on the inner surface of the panel glass, and at least a black matrix window portion of the first light-absorbing material layer that is not deposited with the first light-absorbing material layer. In a black matrix type color picture tube having a phosphor layer partially deposited, the phosphor layer is provided on the inner surface of the panel glass in the portion of the black matrix window portion to which the phosphor layer is deposited. A plurality of covered second light absorbing material layers are provided, and the first light absorbing material layer is
and a color picture tube, characterized in that the back side of the second light-absorbing material layer is a light-reflecting layer. 2. The color picture tube according to claim 1, wherein the light reflecting layer on the back side of the first light absorbing material layer is only at the edge of the black matrix window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3330579A JPS55126946A (en) | 1979-03-23 | 1979-03-23 | Color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3330579A JPS55126946A (en) | 1979-03-23 | 1979-03-23 | Color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55126946A JPS55126946A (en) | 1980-10-01 |
| JPS6329374B2 true JPS6329374B2 (en) | 1988-06-13 |
Family
ID=12382834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3330579A Granted JPS55126946A (en) | 1979-03-23 | 1979-03-23 | Color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55126946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124867U (en) * | 1991-04-25 | 1992-11-13 | 住友重機械工業株式会社 | Motor with speed detector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0218838A (en) * | 1988-07-04 | 1990-01-23 | Nec Corp | Color picture tube fluorescent screen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427356A (en) * | 1977-08-03 | 1979-03-01 | Hitachi Ltd | Color braun tube |
-
1979
- 1979-03-23 JP JP3330579A patent/JPS55126946A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427356A (en) * | 1977-08-03 | 1979-03-01 | Hitachi Ltd | Color braun tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124867U (en) * | 1991-04-25 | 1992-11-13 | 住友重機械工業株式会社 | Motor with speed detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55126946A (en) | 1980-10-01 |
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