JPS6321302B2 - - Google Patents
Info
- Publication number
- JPS6321302B2 JPS6321302B2 JP53154150A JP15415078A JPS6321302B2 JP S6321302 B2 JPS6321302 B2 JP S6321302B2 JP 53154150 A JP53154150 A JP 53154150A JP 15415078 A JP15415078 A JP 15415078A JP S6321302 B2 JPS6321302 B2 JP S6321302B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- face plate
- curve
- maximum value
- phosphor 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 38
- 238000000295 emission spectrum Methods 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 15
- 238000000862 absorption spectrum Methods 0.000 claims description 13
- 239000011572 manganese Substances 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 238000010894 electron beam technology Methods 0.000 claims description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
本発明はカラー受像管に係り、特に画面のコン
トラストを良好にするカラー受像管に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color picture tube, and more particularly to a color picture tube that improves the contrast of the screen.
カラー受像管の画面のコントラストを向上させ
る方法としては、フエースプレート用ガラスの透
過率を低減させる方法や、フエースプレート内面
に規則的に被着形成される螢光面の電子ビームの
射突により赤色、緑色、青色各色に発光するドツ
ト状または帯状の螢光体層間に黒色光吸収層を介
在させて螢光面の外来光による光反射率を低減さ
せる方法などがある。 Methods to improve the contrast on the screen of a color picture tube include reducing the transmittance of the glass for the face plate, and by impinging the electron beam on the fluorescent surface regularly deposited on the inner surface of the face plate. There is a method in which a black light absorbing layer is interposed between dot-shaped or band-shaped phosphor layers that emit light in green and blue colors to reduce the light reflectance of the phosphor surface due to external light.
前述した方法はいずれも実用されている方法で
あるが、前者はコントラストを向上させる一方、
画面の明るさをも減少させるという不所望な結果
を生ずる。また後者は螢光面の形成方法が複雑で
あり、経済性に劣るという欠点である。 All of the above methods are in practical use, but while the former improves contrast,
This has the undesirable effect of also reducing the brightness of the screen. In addition, the latter method requires a complicated method for forming the fluorescent surface, and has the disadvantage of being inferior in economical efficiency.
本発明は前記従来の諸欠点に鑑みなされたもの
であり、螢光面のコントラストを向上させると共
に、螢光面を比較的に簡単に形成出来るうえ、明
るさを減少させることが極めて少ないカラー受像
管を提供することを目的としている。 The present invention has been made in view of the above-mentioned conventional drawbacks, and it improves the contrast of the fluorescent surface, allows the fluorescent surface to be formed relatively easily, and provides color image reception with extremely little reduction in brightness. The purpose is to provide a tube.
次に第１図及び第２図により本発明の一実施例
を説明する。 Next, one embodiment of the present invention will be explained with reference to FIGS. 1 and 2.
即ち第１図に於て、B1曲線、G1曲線、R1曲線
は各青色、緑色、赤色に発光する螢光体層の発光
スペクトル曲線であり、例えば青色に発光する螢
光体層を形成する螢光体としてZnS：Agを使用
すれば、図の様に445nmに極大値を有するB1曲
線となり、緑色に発光する螢光体層を形成する螢
光体としてZnS：Cu，Alを使用すれば、図の様
に529nmに極大値を有するG1曲線となり、赤色
に発光する螢光体層を形成する螢光体として
Y2O3S：Euを使用すれば、図の様に626nmに極
大値を有するR1曲線となる。この様な各螢光体
層のスペクトル分布に対して、本実施例に於ては
これら螢光体層を被着形成するガラスフエースプ
レートの吸収スペクトルを例えば破線１に示す様
に前記各螢光体層の発光スペクトルの極大値間に
吸収スペクトルの極大値が来るような成分によつ
て形成したことを特徴としている。この様な吸収
スペクトル曲線を有するガラスとしては、通常の
SiO2を主成分としBaO，NaO，CaOなどからな
る組成にネオジウム（Nd）を含ませれば吸収ス
ペクトル曲線１中の（l1）の部分の特性を持つよ
うになり、またマンガン（Mn）を含ませれば吸
収スペクトル曲線１中の（l2）の部分の特性を持
つようになり、この両者即ちネオジウム（Nd）
とマンガン（Mn）を共に含ませることにより曲
線１の様に極大値を２個有するフエースプレート
を作ることが出来る。 That is, in FIG. 1, the B 1 curve, G 1 curve, and R 1 curve are the emission spectrum curves of the phosphor layer that emits blue, green, and red. For example, if the phosphor layer that emits blue is If ZnS:Ag is used as the phosphor to form, the B1 curve will have a maximum value at 445 nm as shown in the figure, and if ZnS:Cu or Al is used as the phosphor to form the phosphor layer that emits green light If used, the G1 curve will have a maximum value at 529nm as shown in the figure, and it will act as a phosphor forming a phosphor layer that emits red light.
If Y 2 O 3 S:Eu is used, the R 1 curve will have a maximum value at 626 nm as shown in the figure. Regarding the spectral distribution of each phosphor layer, in this example, the absorption spectrum of the glass face plate on which these phosphor layers are adhered is as shown by the broken line 1. It is characterized by being formed of components such that the maximum value of the absorption spectrum lies between the maximum values of the emission spectrum of the body layer. As a glass with such an absorption spectrum curve, ordinary
If neodymium (Nd) is included in a composition consisting mainly of SiO 2 and BaO, NaO, CaO, etc., it will have the characteristics of the (l 1 ) part of absorption spectrum curve 1, and manganese (Mn) If it is included, it will have the characteristics of the (l 2 ) part in absorption spectrum curve 1, and both of these, that is, neodymium (Nd)
By including both manganese (Mn) and manganese (Mn), it is possible to create a face plate with two maximum values as shown in curve 1.
この様にすることにより第１図から明らかな様
に各螢光体層を形成する螢光体のスペクトルはそ
れぞれの極大値近傍に於ては殆んど減衰すること
はないが、その他の部分はB1曲線、G1曲線、R1
曲線で示す発光スペクトル強度がガラスフエース
プレートの吸収特性により大きく減衰することに
なる。 By doing this, as is clear from Figure 1, the spectrum of the phosphor forming each phosphor layer is hardly attenuated near its maximum value, but in other parts. are B 1 curve, G 1 curve, R 1
The intensity of the emission spectrum shown by the curve is greatly attenuated due to the absorption characteristics of the glass face plate.
即ち第２図に示すように第１図の吸収スペクト
ル曲線１をもつフエースプレート２を介して管外
から入る外来光３のうち螢光面４で反射して出て
くる光５は、各螢光体層Ｂ，Ｇ，Ｒの発光スペク
トルの極大値近傍以外で吸収される。一方、例え
ば青色発光螢光体層Ｂから発光する光は第１図の
様に445nm近傍の光６のみ選択的に出てくるよう
になる。これは他の螢光体層から発光する光につ
いても同様である。 That is, as shown in FIG. 2, out of the external light 3 that enters from outside the tube through the face plate 2 having the absorption spectrum curve 1 shown in FIG. It is absorbed outside the vicinity of the maximum value of the emission spectrum of the light body layers B, G, and R. On the other hand, for example, as for the light emitted from the blue light emitting phosphor layer B, only the light 6 in the vicinity of 445 nm selectively comes out as shown in FIG. This also applies to light emitted from other phosphor layers.
従つて本実施例の様に形成したガラスフエース
プレートを用いることにより画像のコントラスト
を向上させることが可能となる。 Therefore, by using the glass face plate formed as in this embodiment, it is possible to improve the contrast of the image.
前記実施例において、３色に発光する螢光体層
からなる螢光面から反射される外来光の色は視聴
者の眼にほとんど無着色に感じる必要があるた
め、ガラスフエースプレートの吸収スペクトル
は、各螢光体層の発光スペクトル間に於てそれぞ
れ第１図の様に２つの極大値をもつように形成
し、かつこの吸収スペクトルの合成結果が眼には
無着色となるように前記２つの極大値を量的に制
御する必要がある。 In the above example, the color of the external light reflected from the phosphor surface made of phosphor layers that emit light in three colors must be felt by the viewer's eyes to be almost uncolored, so the absorption spectrum of the glass face plate is , the emission spectrum of each phosphor layer is formed to have two maximum values as shown in FIG. It is necessary to quantitatively control the two local maximum values.
また本発明に於ては各螢光体層の発光スペクト
ル強度分布と、ガラスフエースプレートの吸収ス
ペクトル強度分布は共に急峻な方が望ましい。そ
の理由は前記各螢光体層の発光スペクトル強度分
布とガラスフエースプレートの吸収スペクトル強
度分布が重複すると、その部分に於て螢光体層の
発光強度が減衰し画面の明るさが低下するからで
ある。 Further, in the present invention, it is desirable that both the emission spectrum intensity distribution of each phosphor layer and the absorption spectrum intensity distribution of the glass face plate be steep. The reason for this is that when the emission spectrum intensity distribution of each of the phosphor layers and the absorption spectrum intensity distribution of the glass face plate overlap, the emission intensity of the phosphor layer attenuates in that area and the brightness of the screen decreases. It is.
前述した本発明の実施例はガラスフエースプレ
ートに各螢光体層のスペクトル分布の極大値間に
それぞれ吸収スペクトル分布の極大値がくるもの
について説明したが、これに限定するものでな
く、例えばガラスフエースプレートには例えば青
色発光螢光体層の発光スペクトルの極大値と緑色
発光螢光体層の発光スペクトルの極大値との間に
のみ吸収スペクトルの極大値を持せるようにし、
緑色発光螢光体層の発光スペクトルの極大値と赤
色発光螢光体層の発光スペクトルの極大値との間
の波長部分に相当する補色を与えるために、３色
に発光する各螢光体層の少なくとも１つの螢光体
層に顔料を附加着色し、例えば第１図の極大値
（l1）部をこれによつて補足することにより画面
のコントラストを良好にすることが出来る。この
場合、電子ビームを射突させない場合の螢光面の
色は、この顔料により多少着色されて見えるが、
これは問題とならない程度とすることが出来る。 In the above-described embodiments of the present invention, the maximum value of the absorption spectral distribution is located between the maximum values of the spectral distribution of each phosphor layer on the glass face plate, but the present invention is not limited to this. For example, the face plate is designed so that the absorption spectrum has a maximum value only between the maximum value of the emission spectrum of the blue-emitting phosphor layer and the maximum value of the emission spectrum of the green-emitting phosphor layer.
Each phosphor layer emits three colors to provide complementary colors corresponding to the wavelength portion between the maximum value of the emission spectrum of the green-emitting phosphor layer and the maximum value of the emission spectrum of the red-emitting phosphor layer. The contrast of the screen can be improved by adding a pigment to at least one phosphor layer and supplementing the maximum value (l 1 ) portion in FIG. 1 with this, for example. In this case, the color of the fluorescent surface when the electron beam is not struck appears to be somewhat colored by this pigment, but
This can be set to a level that does not pose a problem.
前述の様に本発明のカラー受像管はガラスフエ
ースプレートの光吸収またはガラスフエースプレ
ートの光吸収と螢光体の着色と云う簡単な構造に
より画面の明るさを減少させることなくコントラ
ストを良好にすることが出来るので、その工業的
価値は極めて大である。 As mentioned above, the color picture tube of the present invention has a simple structure of light absorption by the glass face plate or light absorption by the glass face plate and coloring of the phosphor, so that good contrast can be achieved without reducing the brightness of the screen. Therefore, its industrial value is extremely large.
第１図は本発明の一実施例に適応する各色発光
螢光層の発光スペクトル特性及び吸収スペクトル
特性を示す曲線図、第２図は螢光面での外来光の
反射及び螢光体層の発光経路を示す説明用断面図
である。
１……ガラスフエースプレートの吸収スペクト
ル曲線、B1……青色螢光体の発光スペクトル曲
線、G1……緑色螢光体の発光スペクトル曲線、
R1……赤色螢光体の発光スペクトル曲線、３…
…外来光。
FIG. 1 is a curve diagram showing the emission spectrum characteristics and absorption spectrum characteristics of each color light-emitting phosphor layer adapted to an embodiment of the present invention, and FIG. 2 shows the reflection of external light on the phosphor surface and the phosphor layer. FIG. 3 is an explanatory cross-sectional view showing a light emission path. 1...Absorption spectrum curve of glass face plate, B1 ...Emission spectrum curve of blue phosphor, G1 ...Emission spectrum curve of green phosphor,
R 1 ... Emission spectrum curve of red phosphor, 3...
...external light.
Claims (1)
の射突によりそれぞれ赤色、緑色及び青色に発光
しかつ発光スペクトルに少なくとも１つづつ極大
値を有する３色蛍光体層からなる蛍光面が形成さ
れるカラー受像管に於いて、前記ガラスフエース
プレートはその組成中にネオジウム及びマンガン
を含有して前記３色蛍光体層の各発光スペクトル
の極大値間に吸収スペクトルの極大値をもつガラ
スから構成されていることを特徴とするカラー受
像管。1. A color picture tube in which a phosphor screen consisting of a three-color phosphor layer that emits red, green, and blue light and has at least one maximum value in the emission spectrum is formed on the inner surface of a glass face plate by the impingement of an electron beam. In the above, the glass face plate is made of a glass containing neodymium and manganese in its composition and having a maximum value of the absorption spectrum between the maximum values of the emission spectra of the three color phosphor layers. Features a color picture tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15415078A JPS5581449A (en) | 1978-12-15 | 1978-12-15 | Color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15415078A JPS5581449A (en) | 1978-12-15 | 1978-12-15 | Color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5581449A JPS5581449A (en) | 1980-06-19 |
| JPS6321302B2 true JPS6321302B2 (en) | 1988-05-06 |
Family
ID=15577950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15415078A Granted JPS5581449A (en) | 1978-12-15 | 1978-12-15 | Color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5581449A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143562A (en) * | 1984-10-31 | 1985-07-29 | Mitsubishi Electric Corp | Cathode-ray tube for light source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524778A (en) * | 1975-06-30 | 1977-01-14 | Hitachi Ltd | Color picture tube |
| JPS5483368A (en) * | 1977-12-16 | 1979-07-03 | Hitachi Ltd | Picture tube |
-
1978
- 1978-12-15 JP JP15415078A patent/JPS5581449A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524778A (en) * | 1975-06-30 | 1977-01-14 | Hitachi Ltd | Color picture tube |
| JPS5483368A (en) * | 1977-12-16 | 1979-07-03 | Hitachi Ltd | Picture tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5581449A (en) | 1980-06-19 |
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