JP3103643B2 - Picture tube - Google Patents
Picture tubeInfo
- Publication number
- JP3103643B2 JP3103643B2 JP04011708A JP1170892A JP3103643B2 JP 3103643 B2 JP3103643 B2 JP 3103643B2 JP 04011708 A JP04011708 A JP 04011708A JP 1170892 A JP1170892 A JP 1170892A JP 3103643 B2 JP3103643 B2 JP 3103643B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- face panel
- glass substrate
- film
- picture tube
- 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 - Fee Related
Links
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、帯電防止および光反射
低減の両機能を備えた受像管に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picture tube having both functions of preventing static electricity and reducing light reflection.
【０００２】[0002]
【従来の技術】受像管のフェースパネルの外面に静電気
が蓄積すると、感電の危険が生じるのみならず微細なご
みが付着しやすくなる。また、室内照明灯などによるい
わゆる外来光がフェースパネルの外面上で鏡面反射する
と、照明灯が映るなどして画像が見にくくなる。そこ
で、フェースパネルの外面に化学的または機械的な加工
を施し、またはシリカをコートすることによって粗面化
された外面を得、鏡面反射の防止策とすることが一般に
行われている。また、多重干渉膜を用いた反射防止策も
知られている。さらに、アンチモンをドープした酸化ス
ズや、スズをドープした酸化インジウム等による導電性
薄膜をフェースパネルの外面上に設け、帯電防止策とす
ることも行われている。2. Description of the Related Art When static electricity accumulates on the outer surface of a face panel of a picture tube, not only the danger of electric shock is caused, but also minute dust tends to adhere. In addition, when so-called extraneous light from an indoor illumination lamp or the like is specularly reflected on the outer surface of the face panel, the illumination lamp is reflected and the image becomes difficult to see. Therefore, it is common practice to apply chemical or mechanical processing to the outer surface of the face panel, or to coat the surface with silica to obtain a roughened outer surface to prevent specular reflection. Also, an antireflection measure using a multiple interference film is known. Further, a conductive thin film made of antimony-doped tin oxide, tin-doped indium oxide, or the like is provided on the outer surface of the face panel to prevent static electricity.
【０００３】[0003]
【発明が解決しようとする課題】しかし、前述のような
光反射低減策をとると、フェースパネルの外面に生じた
多数の微細な凹凸が外来光を乱反射させてくれるもの
の、蛍光体膜で発生した画像光をも乱反射させるので、
解像度が低下して光沢感も失われてしまう。また、在来
の多重干渉膜を得るには真空蒸着が必要となるので、生
産性が低くコスト高を招く。さらに、前述のような材料
からなる導電性薄膜は、フェースパネルよりも高い光屈
折率を示すので、パネル外面での光反射がさらに増して
照明灯などが一層映りやすくなる。However, when the above-described light reflection reducing measure is taken, a large number of fine irregularities generated on the outer surface of the face panel cause irregular reflection of extraneous light, but are generated on the phosphor film. Diffusely reflected image light
The resolution is reduced and the gloss is lost. In addition, vacuum deposition is required to obtain a conventional multiple interference film, which results in low productivity and high cost. Further, since the conductive thin film made of the above-described material has a higher light refractive index than the face panel, the light reflection on the outer surface of the panel is further increased, so that an illumination lamp or the like can be more easily reflected.
【０００４】[0004]
【課題を解決するための手段】本発明は、かかる従来の
課題を解決すべくなされたもので、フェースパネルを形
成するガラス基板の外面上に設けられた第１の複合層
と、前記ガラス基板の内面上に設けられた第２の複合層
とが、それぞれ前記ガラス基板の光屈折率よりも高い光
屈折率の第１透光性膜と、この第１透光性膜上に設けら
れて前記ガラス基板の光屈折率よりも低い光屈折率の第
２透光性膜とを有する構成となし、かつ、少なくとも前
記第１の複合層の第１透光性膜に導電性を有せしめる。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and comprises a first composite layer provided on an outer surface of a glass substrate forming a face panel; A second composite layer provided on the inner surface of the first light-transmitting film having a light refractive index higher than the light refractive index of the glass substrate, and a second composite layer provided on the first light-transmitting film. A second light-transmitting film having a light refractive index lower than the light refractive index of the glass substrate; and at least the first light-transmitting film of the first composite layer has conductivity.
【０００５】[0005]
【作用】このように構成すると、フェースパネルのガラ
ス基板とその表裏に設けられた第１および第２の複合層
とによって光多重干渉作用が得られるので、真空蒸着を
必要とすることなく生産性よく良好な光反射低減効果を
得ることができる。また、第１の複合層の第１層が導電
性を有するので、帯電防止の効果を併せ得ることができ
る。With this configuration, since the optical multiple interference effect can be obtained by the glass substrate of the face panel and the first and second composite layers provided on the front and back surfaces thereof, the productivity can be reduced without the need for vacuum deposition. A good light reflection reduction effect can be obtained well. In addition, since the first layer of the first composite layer has conductivity, an effect of preventing static charge can be obtained.
【０００６】[0006]
【実施例】つぎに本発明を図面に示した実施例とともに
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.
【０００７】図１に示すガラス基板１は、１４インチ型
カラー受像管用にガラス成型された市販のスーパーダー
ク形式フェースパネルのいわゆる前面板部分で、その光
透過率は４６．５％、板厚は約１０mm、光屈折率は１．
５４である。このガラス基板１の表裏両面上に第１およ
び第２の複合層２，３がそれぞれ設けられており、第１
の複合層２は、第１透光性膜４と、この膜４の外面上に
積層された第２透光性膜５とからなる。また、第２の複
合層３は、第１透光性膜６と、この膜６の外面上に積層
された第２透光性膜７とからなる。A glass substrate 1 shown in FIG. 1 is a so-called front plate portion of a commercially available super dark type face panel formed of glass for a 14-inch color picture tube, and has a light transmittance of 46.5% and a plate thickness. About 10mm, light refractive index is 1.
54. First and second composite layers 2 and 3 are provided on both front and back surfaces of the glass substrate 1, respectively.
Is composed of a first light-transmitting film 4 and a second light-transmitting film 5 laminated on the outer surface of the film 4. The second composite layer 3 includes a first light-transmitting film 6 and a second light-transmitting film 7 laminated on the outer surface of the film 6.
【０００８】両複合層２，３の第１透光性膜４，６の各
膜厚は６０nm〜１００nmで、その光屈折率はガラス基板
１の光屈折率（１．５４）よりも大きい１．６４〜１．
６８、抵抗値は９０，０００ＭΩ以下である。また、両
複合層２，３の第２透光性膜５，７の各膜厚は６８nm〜
１１５nmで、その光屈折率はガラス基板１の光屈折率よ
りも小さい１．４４〜１．４８で、かかる膜は下記の手
順によって形成される。The thickness of each of the first translucent films 4 and 6 of the two composite layers 2 and 3 is 60 nm to 100 nm, and the light refractive index thereof is larger than the light refractive index (1.54) of the glass substrate 1. .64-1.
68, the resistance value is 90,000 MΩ or less. The thickness of each of the second translucent films 5 and 7 of the composite layers 2 and 3 is 68 nm or more.
At 115 nm, its light refractive index is 1.44 to 1.48, which is smaller than the light refractive index of the glass substrate 1, and such a film is formed by the following procedure.
【０００９】洗浄および乾燥の各処理を受けたフェース
パネルを約１００ｒｐｍの回転速度で軸転させ、約４０
℃の温度に保持した当該ガラス基板１の内面上にシリカ
を主成分とする第１透光性膜６を均一に塗布形成する。
この膜形成において用いる塗材は、アンチモンをドープ
した酸化スズ、酸化チタンおよびシリカをアルコール系
揮発性溶媒に投入して得たもので、この溶液の固形分濃
度は約１．１％であった。The face panel which has been subjected to each of the washing and drying processes is rotated about 100 rpm to rotate about 40
A first light-transmitting film 6 containing silica as a main component is uniformly formed on the inner surface of the glass substrate 1 maintained at a temperature of ° C.
The coating material used in this film formation was obtained by charging tin oxide, titanium oxide and silica doped with antimony into an alcohol-based volatile solvent, and the solid content of this solution was about 1.1%. .
【００１０】かかる溶液を軸転中のフェースパネルのガ
ラス基板１に、ノズルを通じて１２０秒間にわたりまん
べんなく噴射する。かくして得られた塗膜を、ガラス基
板１が約５０℃の温度になるまで加熱して乾燥させる。[0010] Such a solution is evenly sprayed onto the glass substrate 1 of the face panel during the rotation for 120 seconds through a nozzle. The coating thus obtained is dried by heating until the glass substrate 1 has a temperature of about 50 ° C.
【００１１】ガラス基板１を約４０℃の温度に下げたの
ち、第１透光性膜６上に第２透光性膜７を塗布形成す
る。この段階での回転塗布条件は第１透光性膜の塗布条
件と同様でよく、塗材としてはシリカ溶液を用いる。こ
の溶液はアルコール系の揮発性溶媒にシリカを投入して
得たもので、この溶液の固形分濃度は約０．７５％であ
った。After the temperature of the glass substrate 1 is lowered to about 40 ° C., a second light transmitting film 7 is formed on the first light transmitting film 6 by coating. The spin coating conditions at this stage may be the same as the coating conditions for the first translucent film, and a silica solution is used as a coating material. This solution was obtained by charging silica into an alcohol-based volatile solvent, and the solution had a solid concentration of about 0.75%.
【００１２】ガラス基板１の外面上にも、上述と同様の
要領で第１透光性膜４および第２透光性膜５を順次に塗
布形成する。これら塗膜はフェースパネルを約４５０℃
に加熱することによってその機械的強度を増大させる。
かくして二層構造の第１および第２の複合層２，３がガ
ラス基板１の表裏両面に積層形成されるので、次にかか
る複合フェースパネルを用いてカラー受像管を通常の要
領で製造する。A first light-transmitting film 4 and a second light-transmitting film 5 are sequentially formed on the outer surface of the glass substrate 1 in the same manner as described above. These coatings make the face panel about 450 ° C
To increase its mechanical strength.
Thus, since the first and second composite layers 2 and 3 having the two-layer structure are formed on both the front and back surfaces of the glass substrate 1, a color picture tube is manufactured using the composite face panel in a usual manner.
【００１３】得られた受像管のフェースパネルの外面に
おける光反射は、図２に曲線ａで示すようなスペクトル
となり、これは、同図に曲線ｂで示す在来品の光反射に
比べて格段に低いことが分かる。The light reflection on the outer surface of the face panel of the picture tube thus obtained has a spectrum as shown by a curve a in FIG. 2, which is significantly different from the light reflection of a conventional product shown by a curve b in FIG. It turns out that it is low.
【００１４】一般に、受像管における光反射を考えると
き、フェースパネルの外面における光反射と内面におけ
る光反射との和でとらえる必要がある。フェースパネル
外面での光反射率を低減させると、フェースパネル内面
からの光反射が目立ってくる。そこで本発明では前述の
ように第２の複合層を設けて、フェースパネルの内面側
における光反射率も低減させている。In general, when considering light reflection in a picture tube, it is necessary to capture light reflection on the outer surface and light reflection on the inner surface of the face panel. When the light reflectance on the outer surface of the face panel is reduced, light reflection from the inner surface of the face panel becomes conspicuous. Therefore, in the present invention, as described above, the second composite layer is provided to reduce the light reflectance on the inner surface side of the face panel.
【００１５】因に、受像管フェースパネルの外面におけ
る光反射は、ガラス基板１の光屈折率で定まり、光屈折
率が１．５４のスーパーダーク形式フェースパネルを用
いた場合の外面における反射率Ｒoは４．５％である。
また、表裏両面での全光反射率は、蛍光面の光反射率を
Ｒs、パネルガラスの光透過率をＴgとするとき、Ｒs×
（１−Ｒo）の二乗×Ｔgの二乗で求められるので、本例
では１１．８％となり、これより外面反射率の４．５％
を差し引いた７．３％が内面での光反射率となる。光透
過率が５７％のテイント形式、光透過率が７３．５％の
グレー形式、光透過率が８５．５％のクリアー形式の各
ガラス生地を用いて成型されたフェースパネルの全光反
射率はそれぞれ１７．８％、２９．６％、４０％とな
る。The light reflection on the outer surface of the picture tube face panel is determined by the light refractive index of the glass substrate 1. The reflectance R on the outer surface when a super dark face panel having a light refractive index of 1.54 is used. o is 4.5%.
The total light reflectance at both surfaces, the light reflectance of the phosphor screen R s, when the light transmittance of the panel glass and T g, R s ×
Since it is obtained by the square of (1-R o ) × T g , it is 11.8% in this example, which is 4.5% of the external reflectance.
7.3% after subtraction is the light reflectance on the inner surface. Total light reflectance of a face panel molded using glass materials of a tint type with a light transmittance of 57%, a gray type with a light transmittance of 73.5%, and a clear type with a light transmittance of 85.5% Are 17.8%, 29.6%, and 40%, respectively.
【００１６】外面での反射に比べて内面での反射が著し
く多いグレー形式およびクリアー形式のものでは、外面
反射に起因して照明灯等が映る弊害が少なく、かつ、外
面反射の低減によるコントラスト改善効果が少ない。し
たがって、本発明はとくにスーパーダーク形式およびテ
イント形式のフェースパネルを用いる受像管に適用して
顕著な効果を得ることができる。In the gray type and the clear type, in which the reflection on the inner surface is remarkably larger than the reflection on the outer surface, there is little adverse effect of the illumination lamp or the like due to the outer reflection, and the contrast is improved by reducing the outer reflection. Less effective. Therefore, the present invention can be applied to a picture tube using a face panel of a super dark type and a taint type, and a remarkable effect can be obtained.
【００１７】光反射率の低減は光透過率の増大に対応す
る。図２に曲線ａで示される外面反射スペクトルのボト
ム波長を蛍光体発光スペクトルのピーク値に合わせる
と、当該蛍光体の実質的発光輝度が他色蛍光体に比べて
相対的に増大するので、カラー受像管において白色バラ
ンスを得るときの３電流比を改善することができる。す
なわち、カラー受像管で白色バランスを得るための赤、
緑および青の電流比Ｒ：Ｇ：Ｂがたとえば３８．７：３
２．０：２９．３であった場合に、これを３７．７：３
２．５：２９．８等の電流比に改善することができる。
なお、前記ボトム波長は膜厚と光屈折率との積の４倍で
あり、前記ボトム波長は膜厚を変えることによって可視
域（３９０nm〜６８０nm）内で移動させ得る。ただし、
ボトム波長の移動によって膜の干渉に起因した反射色が
変わるので、４９０nm〜６３０nmの波長範囲内で行うの
が好ましい。このため、膜厚の許容範囲も第１透光性膜
は７５nm〜９４nmの範囲で、そして、第２透光性膜は８
５nm〜１０６nmの範囲でそれぞれ選択すべきである。The reduction in light reflectance corresponds to an increase in light transmittance. When the bottom wavelength of the external reflection spectrum shown by the curve a in FIG. 2 is adjusted to the peak value of the phosphor emission spectrum, the substantial emission luminance of the phosphor is relatively increased as compared with the other color phosphors. It is possible to improve the three-current ratio when obtaining a white balance in the picture tube. That is, red for obtaining a white balance with a color picture tube,
The current ratio R: G: B of green and blue is, for example, 38.7: 3.
If it was 2.0: 29.3, this was converted to 37.7: 3
The current ratio can be improved to 2.5: 29.8 or the like.
The bottom wavelength is four times the product of the film thickness and the photorefractive index, and the bottom wavelength can be moved within the visible range (390 nm to 680 nm) by changing the film thickness. However,
Since the reflection color due to the interference of the film changes due to the movement of the bottom wavelength, it is preferable to perform the reflection within the wavelength range of 490 nm to 630 nm. Therefore, the allowable range of the film thickness is 75 nm to 94 nm for the first light transmitting film, and 8 nm for the second light transmitting film.
Each should be selected in the range of 5 nm to 106 nm.
【００１８】上述した実施例では、第１および第２の複
合層をそれぞれ２層となしたが、これは３層またはそれ
以上の多層となしてもよい。また、第２の複合層の第１
透光性膜６は導電性を帯びないものであってもよい。In the above-described embodiment, the first and second composite layers each have two layers. However, the first and second composite layers may have three or more layers. Also, the first of the second composite layers
The translucent film 6 may not be conductive.
【００１９】[0019]
【発明の効果】以上のように本発明によると、良好な光
反射低減効果を奏する受像管を生産性よく得ることがで
きるのみならず、帯電防止の効果を併せ得ることがで
き、かつまた、カラー受像管にあっては白色バランスを
得るときの電流比を改善することもできる。As described above, according to the present invention, not only can a picture tube having a good light reflection reducing effect be obtained with high productivity, but also an antistatic effect can be obtained. In a color picture tube, the current ratio for obtaining white balance can be improved.
【図１】本発明を実施した受像管の複合フェースパネル
の要部断面図FIG. 1 is a sectional view of a main part of a composite face panel of a picture tube embodying the present invention.
【図２】同受像管のフェースパネル外面における光反射
のスペクトル図FIG. 2 is a spectrum diagram of light reflection on the outer surface of the face panel of the picture tube.
１ ガラス基板 ２ 第１の複合層 ３ 第２の複合層 ４，６ 第１透光性膜 ５，７ 第２透光性膜 DESCRIPTION OF SYMBOLS 1 Glass substrate 2 1st composite layer 3 2nd composite layer 4,6 1st translucent film 5,7 2nd translucent film
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−291836（ＪＰ，Ａ) 特開 平４−345737（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01J 29/88 H01J 29/89 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-291836 (JP, A) JP-A-4-345737 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01J 29/88 H01J 29/89
Claims (1)
面上に設けられた第１の複合層と、前記ガラス基板の内
面上に設けられた第２の複合層とが、それぞれ前記ガラ
ス基板の光屈折率よりも高い光屈折率の第１透光性膜
と、この第１透光性膜上に設けられて前記ガラス基板の
光屈折率よりも低い光屈折率の第２透光性膜とを有し、
少なくとも前記第１の複合層の第１透光性膜が導電性を
有していることを特徴とする受像管。1. A first composite layer provided on an outer surface of a glass substrate forming a face panel, and a second composite layer provided on an inner surface of the glass substrate, respectively. A first light-transmitting film having a light refractive index higher than the refractive index, and a second light-transmitting film provided on the first light-transmitting film and having a light refractive index lower than the light refractive index of the glass substrate. Has,
A picture tube wherein at least a first light-transmitting film of the first composite layer has conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04011708A JP3103643B2 (en) | 1992-01-27 | 1992-01-27 | Picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04011708A JP3103643B2 (en) | 1992-01-27 | 1992-01-27 | Picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05205659A JPH05205659A (en) | 1993-08-13 |
| JP3103643B2 true JP3103643B2 (en) | 2000-10-30 |
Family
ID=11785549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04011708A Expired - Fee Related JP3103643B2 (en) | 1992-01-27 | 1992-01-27 | Picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3103643B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2715854B2 (en) * | 1993-08-27 | 1998-02-18 | 関西日本電気株式会社 | Cathode ray tube |
| KR970012944A (en) * | 1995-08-10 | 1997-03-29 | 윤종용 | Cathode ray tube and its manufacturing method |
-
1992
- 1992-01-27 JP JP04011708A patent/JP3103643B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05205659A (en) | 1993-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |