JP2795893B2 - Cathode ray tube - Google Patents
Cathode ray tubeInfo
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- JP2795893B2 JP2795893B2 JP1092624A JP9262489A JP2795893B2 JP 2795893 B2 JP2795893 B2 JP 2795893B2 JP 1092624 A JP1092624 A JP 1092624A JP 9262489 A JP9262489 A JP 9262489A JP 2795893 B2 JP2795893 B2 JP 2795893B2
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- phosphor
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- ppm
- color
- reflectance
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Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） この発明は、緑蛍光体からなる蛍光面を有するカラー
受像管などの陰極線管に関する。The present invention relates to a cathode ray tube such as a color picture tube having a phosphor screen made of a green phosphor.
（従来の技術） 近年、カラー受像管の緑色成分蛍光体として、ZnS:C
u,Al,Au蛍光体が用いられている。この蛍光体は、特公
昭57−42117号公報に述べられているように、従来のZn
S:Cu,Al（Cu＝120ppm）にくらべ、CIE表色系色度座標の
ｘおよびｙの値が 0.300≦ｘ≦0.350 0.560≦ｙ≦0.610 である黄緑色領域に色度値を有する。この蛍光体が使用
される理由は、カラー受像管の白色輝度を改善するため
である。しかし、この蛍光体を用いたカラー受像管は、
その発光色が黄緑色を呈するため、カラー受像管の高品
位化にともなう発光色の高純度化の要求に対し満足でき
ないものとなってきた。(Prior art) In recent years, as a green component phosphor of a color picture tube, ZnS: C
u, Al, Au phosphors are used. This phosphor, as described in JP-B-57-42117, uses a conventional Zn.
Compared to S: Cu, Al (Cu = 120 ppm), the CIE color system has a chromaticity value in a yellow-green region where the x and y values of chromaticity coordinates are 0.300 ≦ x ≦ 0.350 0.560 ≦ y ≦ 0.610. The reason for using this phosphor is to improve the white luminance of the color picture tube. However, color picture tubes using this phosphor are
Since the color of the emitted light is yellow-green, it has become unsatisfactory to meet the demand for higher purity of the emitted color due to the higher quality of the color picture tube.
上記発光色の高純度化の要求に対して本出願人は、特
開昭60−8383号公報にカラー受像管の好ましい緑色成分
蛍光体として、母体1gに対してCu付活量が１×10-4〜３
×10-4ｇのZnS:Cu,Alを用い、赤色成分蛍光体として、
母体1gに対してEu付活量が5.1×10-2〜6.1×10-2ｇのY2
O2S:Euを用いて蛍光面を形成したカラー受像管を示し
た。これは、白色輝度を実質的に低下させることなく色
再現域を最大にするための蛍光体組合わせである。In response to the demand for higher emission color, the present applicant disclosed in Japanese Patent Application Laid-Open No. 60-8383 that a Cu activation amount per 1 g of a matrix was 1 × 10 5 as a preferable green component phosphor for a color picture tube. -4 to 3
× 10 -4 g of ZnS: Cu, Al, as a red component phosphor,
Y 2 whose Eu activation amount is 5.1 × 10 -2 to 6.1 × 10 -2 g per 1 g of the base
A color picture tube with a phosphor screen formed using O 2 S: Eu is shown. This is a phosphor combination for maximizing the color gamut without substantially reducing white luminance.
ところで、通常、ZnS:Cu,Al,蛍光体の場合、Cu付活剤
濃度と色度値との関係は、第７図に示すように、色度値
ｘについては実線（１）のように変化し、色度値ｙにつ
いては破線（２）のように変化し、母体1gに対してCu付
活量が６×10-5〜３×10-4ｇの範囲では、ほぼ一定であ
る。一方、カラー受像管の蛍光面を白色輝度，色再現域
および色純度の観点から考察すると、緑色成分蛍光体に
要求される最適な色度値は、 0.294≦ｘ≦0.298 0.615≦ｙ≦0.625 である。したがって、ZnS:Cu,Al蛍光体の場合、最適なC
u付活剤濃度は、160〜220ppmとなる。By the way, in the case of ZnS: Cu, Al, phosphor, usually, the relationship between the Cu activator concentration and the chromaticity value is as shown in FIG. 7 for the chromaticity value x as shown by a solid line (1). The chromaticity value y changes as indicated by the broken line (2), and is substantially constant when the Cu activation amount is in the range of 6 × 10 −5 to 3 × 10 −4 g per 1 g of the base. On the other hand, considering the phosphor surface of the color picture tube from the viewpoint of white luminance, color reproduction range and color purity, the optimum chromaticity value required for the green component phosphor is 0.294 ≦ x ≦ 0.298 0.615 ≦ y ≦ 0.625. is there. Therefore, in the case of ZnS: Cu, Al phosphor, the optimal C
u The activator concentration is 160 to 220 ppm.
しかしながら、このような蛍光体は、従来のZnS:Cu,A
l蛍光体にくらべCu付活剤濃度が高いため、蛍光体の体
色が黄色味を帯び、特に紫外域での反射率が従来のZnS:
Cu,Al蛍光体にくらべて低くなり、パネル内面に塗布さ
れた蛍光体とPVA（ポリビニルアルコール）とADC（重ク
ロム酸アンモニウム）を主成分とする蛍光体スラリ層を
超高圧水銀ランプで露光する際、紫外光が吸収され、露
光時間の増大するばかりでなく、その後蛍光体スラリ層
を現象して得られる蛍光体層のきれ（形状）が劣化する
という問題がおこる。However, such a phosphor is a conventional ZnS: Cu, A
lBecause the Cu activator concentration is higher than the phosphor, the body color of the phosphor takes on a yellow tint, and the reflectance in the ultraviolet region is higher than that of conventional ZnS:
It is lower than the Cu and Al phosphors, and the phosphor coated on the inner surface of the panel and the phosphor slurry layer mainly composed of PVA (polyvinyl alcohol) and ADC (ammonium dichromate) are exposed with an ultra-high pressure mercury lamp. In this case, not only the ultraviolet light is absorbed and the exposure time is increased, but also the problem is caused that the crack (shape) of the phosphor layer obtained by developing the phosphor slurry layer thereafter deteriorates.
第８図は、ZnS:Cu,Al,Au（Cu＝180ppm,Au＝200pp
m）、ZnS:Cu,Al（Cu＝180ppm）、ZnS:Cu,Al（Cu＝120pp
m）各蛍光体の分光反射率を示したものである。この図
において、曲線（３）に示す前記特公昭57−42117号公
報のZnS:Cu,Al,Au（Cu＝180ppm）蛍光体は、曲線（４）
に示す従来のZnS:Cu,Al（Cu＝120ppm）蛍光体にくらべ3
65nmでの反射率が低いため、このZnS:Cu,Al,Au蛍光体を
使用した蛍光体スラリ層は、ZnS:Cu,Al（Cu＝120ppm）
蛍光体からなる蛍光体スラリ層に対して露光時間が約1.
5倍かかる。一方、曲線（５）に示す前記特開昭60−838
3号公報のZnS:Cu,Al（Cu＝180ppm）蛍光体は、365nmで
の反射率が上記ZnS:Cu,Al,Au蛍光体よりは高いが、まだ
ZnS:Cu,Al（Cu＝120ppm）蛍光体より低いため、露光時
間が約1.2倍かかる。FIG. 8 shows ZnS: Cu, Al, Au (Cu = 180 ppm, Au = 200 pp)
m), ZnS: Cu, Al (Cu = 180ppm), ZnS: Cu, Al (Cu = 120pp)
m) Shows the spectral reflectance of each phosphor. In this figure, the ZnS: Cu, Al, Au (Cu = 180 ppm) phosphor of JP-B-57-42117 shown in the curve (3) corresponds to the curve (4)
3 compared to conventional ZnS: Cu, Al (Cu = 120ppm) phosphor
Since the reflectance at 65 nm is low, the phosphor slurry layer using the ZnS: Cu, Al, Au phosphor has a ZnS: Cu, Al (Cu = 120 ppm)
Exposure time for phosphor slurry layer consisting of phosphor is about 1.
Takes 5 times. On the other hand, as shown in the curve (5),
No. 3 ZnS: Cu, Al (Cu = 180 ppm) phosphor has a higher reflectivity at 365 nm than the above ZnS: Cu, Al, Au phosphor, but still has
Exposure time is about 1.2 times longer than ZnS: Cu, Al (Cu = 120ppm) phosphor.
（発明が解決しようとする課題） 上記のように、従来よりカラー受像管の緑色成分蛍光
体として、ZnS:Cu,Al,Au蛍光体やZnS:Cu,Al蛍光体が検
討されているが、カラー受像管の白色輝度や色再現域を
劣化させないようにしようとすると、これら蛍光体は、
体色が黄緑色を帯び、紫外光を吸収するため、蛍光体ス
ラリ層を露光して蛍光体層を形成するときの露光時間が
増大し、かつその後現像して得られる蛍光体層の形状が
劣化するという問題がある。(Problems to be Solved by the Invention) As described above, ZnS: Cu, Al, Au phosphor and ZnS: Cu, Al phosphor have been studied as a green component phosphor of a color picture tube. In order not to degrade the white luminance and color gamut of the color picture tube, these phosphors
Since the body color is yellowish green and absorbs ultraviolet light, the exposure time when exposing the phosphor slurry layer to form the phosphor layer increases, and the shape of the phosphor layer obtained by subsequent development is reduced. There is a problem of deterioration.
この発明は、上記問題点を解決するためになされたも
のであり、カラー受像管などの陰極線管の色再現域を劣
化させることなく、蛍光体の付着力を改善し、かつ蛍光
体層を形成するための露光時間を短縮することを目的と
する。The present invention has been made in order to solve the above-described problems, and improves the adhesion of a phosphor and forms a phosphor layer without deteriorating the color reproduction range of a cathode ray tube such as a color picture tube. It is an object of the present invention to shorten the exposure time for performing the exposure.
（課題を解決するための手段） 緑色成分蛍光体からなる蛍光面を有する陰極線管にお
いて、その緑色成分蛍光体を、ZnSを母体とし、Cu,Alお
よびAuを付活剤として上記母体1gに対してCuの付活量が
８×10-5〜1.5×10-4ｇ、Auの付活量が0.01×10-5〜４
×10-5ｇであり、かつ365nmの反射率が酸化マグネシウ
ム拡散板の反射率を100％とするとき、15％以上であるZ
nS:Cu,Al,Au蛍光体とした。(Means for Solving the Problems) In a cathode ray tube having a phosphor screen composed of a green component phosphor, the green component phosphor is composed of ZnS as a matrix, Cu, Al, and Au as activators and 1 g of the matrix. The activation amount of Cu is 8 × 10 −5 to 1.5 × 10 −4 g, and the activation amount of Au is 0.01 × 10 −5 to 4.
X 10 −5 g, and the reflectance at 365 nm is 15% or more when the reflectance of the magnesium oxide diffuser is 100%.
nS: Cu, Al, Au phosphor was used.
（作用） 上記のように、ZnSを母体とする蛍光体について、従
来と同程度の付活量のCuのほかに、若干量のAuにより付
活すると、365nmでの反射率を低下させることなく、蛍
光体の発光色を最適に維持させることができる。(Function) As described above, when the phosphor having ZnS as a matrix is activated by a small amount of Au in addition to the same activation amount as that of the conventional Cu, the reflectance at 365 nm is not reduced. In addition, the emission color of the phosphor can be maintained optimally.
（実施例） 以下、図面を参照してこの発明を実施例に基づいて説
明する。Hereinafter, the present invention will be described based on embodiments with reference to the drawings.
第１図にその一実施例であるカラー受像管の構成を示
す。このカラー受像管は、パネル（10）およびこのパネ
ル（10）に一体に接合されたファンネル（11）からなる
外囲器を有し、そのパネル（10）内側に、多数の電子ビ
ーム通過孔の形成されたシャドウマスク（12）が装着さ
れ、このシャドウマスク（12）に対向して、パネル（1
0）内面に蛍光面（13）が設けられている。この蛍光面
（13）は、第２図および第３図に示すように、青，緑，
赤に発光するストライプ状またはドット状などの３色蛍
光体層（14B），（14G），（14R）と、この３色蛍光体
層（14B），（14G），（14R）の間隙部を埋める黒色物
質の光吸収層（15）とからなる。FIG. 1 shows the structure of a color picture tube as one embodiment. This color picture tube has a panel (10) and an envelope composed of a funnel (11) integrally joined to the panel (10). Inside the panel (10), a large number of electron beam passage holes are formed. The formed shadow mask (12) is mounted, and the panel (1) is opposed to the shadow mask (12).
0) A fluorescent screen (13) is provided on the inner surface. As shown in FIGS. 2 and 3, the fluorescent screen (13) has blue, green,
The three-color phosphor layers (14B), (14G), (14R), such as stripes or dots, that emit red light, and the gaps between the three-color phosphor layers (14B), (14G), (14R) And a light absorbing layer (15) of a black substance to be filled.
なお、第１図において、（17）はマスク支持手段、
（18）は３電子ビームを放出する電子銃、（19）は陽極
端子、（20）は内部導電膜である。In FIG. 1, (17) is a mask supporting means,
(18) is an electron gun for emitting three electron beams, (19) is an anode terminal, and (20) is an internal conductive film.
ところで、この例のカラー受像管の蛍光面（13）を構
成する緑色蛍光体層（14G）は、ZnSを母体とし、Cu,Al,
Auをそれぞれ付活剤として、母体1gに対して、Cuを８×
10-5〜1.5×10-4ｇ、Auを0.01×10-5〜４×10-5ｇ含有
し、365nmでの反射率が、酸化マグネシウム拡散板の反
射率を100％とするとき、15％以上であるZnS:Cu,Al,Au
蛍光体により構成されている。By the way, the green phosphor layer (14G) constituting the phosphor screen (13) of the color picture tube of this example is based on ZnS, Cu, Al,
Using Au as an activator, Cu is 8 ×
10 −5 to 1.5 × 10 −4 g and 0.01 × 10 −5 to 4 × 10 −5 g of Au, and the reflectance at 365 nm is 15% when the reflectance of the magnesium oxide diffuser is 100%. % Or more of ZnS: Cu, Al, Au
It is composed of a phosphor.
この蛍光体は、つぎのように製造することができる。 This phosphor can be manufactured as follows.
ZnS 1gに対して銅化合物たとえば硫化銅（Cu濃度が８
×10-5〜1.5×10-4ｇ）、アルミニウム化合物たとえば
硝酸アルミニウム（Al濃度が３×10-5〜１×10-3ｇ）お
よび金化合物たとえば塩化金（Au濃度が0.01×10-5〜４
×10-5ｇ）を加えてスラリ状に混合し、乾燥したのち、
この混合物に融剤としてアルカリ金属およびアルカリ土
類金属のハロゲン化物の少なくとも一種を混合する。そ
して、この混合物を石英チューブに充填して900〜1030
℃の温度で0.5〜３時間硫化水素などの還元雰囲気中で
焼成する。その後、脱イオン水で数回洗浄，粉砕処理
し、さらに、濾過，乾燥，ふるいなどをおこなうことに
より得られる。Copper compound such as copper sulfide (Cu concentration 8
× 10 −5 to 1.5 × 10 −4 g), aluminum compounds such as aluminum nitrate (Al concentration: 3 × 10 −5 to 1 × 10 −3 g) and gold compounds such as gold chloride (Au concentration: 0.01 × 10 −5 g) ~ 4
× 10 -5 g), mix into a slurry, and after drying,
This mixture is mixed with at least one of alkali metal and alkaline earth metal halides as a flux. Then, the mixture is filled in a quartz tube, and 900 to 1030
Firing at a temperature of ℃ for 0.5 to 3 hours in a reducing atmosphere such as hydrogen sulfide. Thereafter, it is obtained by washing and pulverizing several times with deionized water, followed by filtration, drying and sieving.
なお、この蛍光体の焼成温度は上記のように900〜103
0℃であるが、好ましくは950〜1000℃で焼成するとよ
い。これは、950℃より低い温度で焼成すると、カラー
受像管製造後の蛍光体の色度値のｙ値が低下し、また10
00℃を越えると、ｘ値が低下するからである。The firing temperature of this phosphor is 900 to 103 as described above.
Although it is 0 degreeC, it is good to bake at 950-1000 degreeC preferably. This is because firing at a temperature lower than 950 ° C. lowers the y value of the chromaticity value of the phosphor after the production of the color picture tube,
If the temperature exceeds 00 ° C., the value x decreases.
つぎに、上記ZnS:Cu,Al,Au蛍光体の特性について述べ
る。Next, characteristics of the ZnS: Cu, Al, Au phosphor will be described.
Cu付活剤濃度を120ppmとして、Au付活剤濃度を20,40,
60,80ppmとしたZnS:Cu,Al,Au蛍光体の粉体特性（輝度，
色度値）をチェックした結果をAu付活剤を含まないZnS:
Cu,Al蛍光体のそれと比較して表１に、また分光反射率
を第４図に示す。この第４図の分光反射率は、第５図に
示すように、セル（22）に測定蛍光体（23）を詰め、こ
の測定蛍光体（23）にスリット（24）を介してハロゲン
電球（色温度3124°Ｋ）からの光を当て、その反射光を
スリット（25）を介して受光器により測定し、同様の方
法により測定した酸化マグネシウム拡散板の反射率を、
100％としてその相対値で示したものであり、曲線（2
7）はZnS:Cu,Al,Au（Cu＝120ppm,Au＝20ppm）蛍光体、
曲線（28）はZnS:Cu,Al,Au（Cu＝120ppm,Au＝40ppm）蛍
光体、曲線（29）はZnS:Cu,Al,Au（Cu＝120ppm,Au＝60p
pm）蛍光体、曲線（30）はZnS:Cu,Al,Au（Cu＝120ppm,A
u＝80ppm）蛍光体の反射率であり、比較例であるZnS:C
u,Al,Au（Cu＝180ppm）の反射率曲線はZnS:Cu,Al,Au（C
u＝120ppm,Au＝80ppm）蛍光体のそれとほぼ一致してい
る。The Cu activator concentration was 120 ppm, and the Au activator concentration was 20,40,
Powder characteristics of ZnS: Cu, Al, Au phosphor with 60,80ppm (brightness,
Chromaticity value) was checked to find that the Au activator-free ZnS:
Table 1 compares the Cu and Al phosphors, and FIG. 4 shows the spectral reflectance. As shown in FIG. 5, the spectral reflectance in FIG. 4 is obtained by filling a cell (22) with a measurement phosphor (23), and inserting a halogen lamp (23) into the measurement phosphor (23) through a slit (24). Light from a color temperature of 3124 ° K) is applied, and the reflected light is measured by a light receiver through a slit (25), and the reflectance of the magnesium oxide diffuser measured by the same method is
The relative value is shown as 100%, and the curve (2
7) ZnS: Cu, Al, Au (Cu = 120ppm, Au = 20ppm) phosphor,
Curve (28) is ZnS: Cu, Al, Au (Cu = 120 ppm, Au = 40 ppm) phosphor, and curve (29) is ZnS: Cu, Al, Au (Cu = 120 ppm, Au = 60p)
pm) Phosphor, curve (30) is ZnS: Cu, Al, Au (Cu = 120ppm, A
u = 80 ppm) is the reflectance of the phosphor, and is ZnS: C which is a comparative example.
The reflectance curve of u, Al, Au (Cu = 180 ppm) is ZnS: Cu, Al, Au (C
(u = 120 ppm, Au = 80 ppm) It is almost the same as that of the phosphor.
この第４図からわかるように、Au付活剤濃度が高くな
るにしたがって365nmでの反射率は低くなり、特にAu付
活剤濃度が60ppmより多くなると、前述した従来の蛍光
体と比較して露光時間の短縮につながらなくなる。つま
り、この発明の目的に適合するAu付活剤濃度は60ppm以
下である。一方、表１からわかるようにAu付活剤濃度が
40ppmより多くなると、色度値のｙ値も低くなり、発光
色の飽和値が劣化する。 As can be seen from FIG. 4, as the Au activator concentration increases, the reflectivity at 365 nm decreases. In particular, when the Au activator concentration exceeds 60 ppm, compared with the above-described conventional phosphor, The exposure time is not shortened. That is, the Au activator concentration suitable for the purpose of the present invention is 60 ppm or less. On the other hand, as can be seen from Table 1, the Au activator concentration is
If it exceeds 40 ppm, the y value of the chromaticity value also decreases, and the saturation value of the emission color deteriorates.
上記結果に基づいてAu付活剤濃度を40ppmとし、Cu付
活剤濃度を変化させた場合の粉体特性（色度値）をAu付
活剤を含まない比較例のそれと比較して表２に示す。Based on the above results, the powder characteristics (chromaticity value) when the Au activator concentration was changed to 40 ppm and the Cu activator concentration was changed were compared with those of the comparative example not containing the Au activator. Shown in
この表２からわかるように、Cu付活剤濃度が70ppmよ
り少なくなると、Auと共付活したときの色度値のｙ値が
低くなる。したがって、この発明の目的に適合するCu付
活剤濃度は80ppm以上である。 As can be seen from Table 2, when the Cu activator concentration is less than 70 ppm, the y value of the chromaticity value when co-activated with Au decreases. Therefore, the Cu activator concentration suitable for the purpose of the present invention is 80 ppm or more.
つぎに、Cu付活剤濃度が120ppm、Au付活剤濃度が20pp
mのZnS:Cu,Al,Au蛍光体および比較例としてCu付活剤濃
度が180ppmのZnS:Cu,Al蛍光体について、表３に365nmで
の反射率と、これら蛍光体を表４に示す組成の蛍光体ス
ラリに調合してこれを21インチカラー受像管用パネルに
塗布して所定の蛍光体層を形成する場合に必要な露光時
間とを示す。また、表５に上記蛍光体のほか、同一青成
分蛍光体および赤成分蛍光体を使用して３色蛍光体層か
らなる蛍光面を形成した各カラー受像管の色度値，単色
輝度（緑），白色輝度を示す。Next, the Cu activator concentration was 120 ppm and the Au activator concentration was 20 pp.
Table 3 shows the reflectance at 365 nm of ZnS: Cu, Al, Au phosphor of m and ZnS: Cu, Al phosphor having a Cu activator concentration of 180 ppm as a comparative example, and Table 4 shows these phosphors. The following shows the exposure time required when a phosphor slurry having the composition is prepared, applied to a 21-inch color picture tube panel to form a predetermined phosphor layer. Table 5 shows the chromaticity values and monochromatic luminance (green color) of each color picture tube having a phosphor screen formed of a three-color phosphor layer using the same blue component phosphor and red component phosphor in addition to the above phosphors. ) Indicates white luminance.
表３からわかるようにCu付活剤濃度が120ppm、Au付活
剤濃度が20ppmのZnS:Cu,Al,Au蛍光体は、Cu付活剤濃度
が180ppmのZnS:Cu,Al比較例蛍光体にくらべて、365nmで
の反射率が高いため、実際に蛍光体層を形成するときの
露光時間が短縮できる。しかも、表５に示されているよ
うに単色輝度で５％、白色輝度で４％向上している。 As can be seen from Table 3, the ZnS: Cu, Al, Au phosphor having a Cu activator concentration of 120 ppm and the Au activator concentration of 20 ppm is a ZnS: Cu, Al comparative phosphor having a Cu activator concentration of 180 ppm. Since the reflectance at 365 nm is higher than that of the phosphor layer, the exposure time for actually forming the phosphor layer can be reduced. Moreover, as shown in Table 5, the monochromatic luminance is improved by 5% and the white luminance is improved by 4%.
この輝度向上の理由は明確ではないが、ZnS:Cu,Al蛍
光体に少量のAuを共付活剤として加えると、母体成分で
あるZnにくらべて原子半径の大きいAuが結晶格子を広
げ、Cuが有効に結晶内部にドーピングされるためである
と考えられる。Although the reason for this brightness improvement is not clear, when a small amount of Au is added to the ZnS: Cu, Al phosphor as a co-activator, Au having a larger atomic radius than the base component Zn expands the crystal lattice, This is probably because Cu is effectively doped inside the crystal.
つぎに、Cu付活剤濃度を150ppmとしてAu付活剤濃度を
10ppm,5ppm,1ppm,0.1ppmとしたZnS:Cu,Al,Au蛍光体、お
よび比較例としてCu付活剤濃度が150ppmのZnS:Cu,Alを
使用して、上記と同様に製造した21インチカラー受像管
の色度値、単色輝度および白色輝度を表６に、また電流
飽和特性を第６図に示す。この第６図において、曲線
（32）はAu付活剤濃度が10ppm、曲線（33）は5ppm、曲
線（34）は1ppm、曲線（35）は0.1ppm、曲線（36）は比
較例（0ppm）の電流飽和特性である。Next, the Cu activator concentration was set to 150 ppm and the Au activator concentration was increased.
10 inch, 5 ppm, 1 ppm, and 0.1 ppm of ZnS: Cu, Al, Au phosphor, and a Cu activator concentration of 150 ppm as a comparative example using ZnS: Cu, Al, 21 inch manufactured in the same manner as above. Table 6 shows chromaticity values, monochromatic luminance, and white luminance of the color picture tube, and FIG. 6 shows current saturation characteristics. In FIG. 6, curve (32) shows a concentration of Au activator of 10 ppm, curve (33) shows 5 ppm, curve (34) shows 1 ppm, curve (35) shows 0.1 ppm, and curve (36) shows a comparative example (0 ppm). ) Is the current saturation characteristic.
特に第６図の曲線（33）〜（35）に示されているよう
にAu付活剤濃度を5ppm以下とすると、電流飽和特性が改
善される。 In particular, when the Au activator concentration is 5 ppm or less as shown by the curves (33) to (35) in FIG. 6, the current saturation characteristics are improved.
以上の結果から、ZnS:Cu,Al,Au蛍光体において、輝度
向上が得られるのはAu付活剤濃度が0.1ppm以上の場合で
あり、また、Cu付活剤濃度が150ppmより多くなると、36
5nmでの反射率が所望値より低くなる。したがって、こ
の発明の目的に適合する蛍光体は、母体ZnS 1gに対して
Cuの付活量が８×10-5〜1.5×10-4ｇ、Auの付活量が0.0
1×10-5〜４×10-5ｇのZnS:Cu,Al,Au蛍光体となる。From the above results, in the ZnS: Cu, Al, Au phosphor, the brightness improvement is obtained when the Au activator concentration is 0.1 ppm or more, and when the Cu activator concentration is more than 150 ppm, 36
The reflectance at 5 nm is lower than the desired value. Therefore, a phosphor suitable for the purpose of the present invention is based on the host ZnS 1 g.
The activation amount of Cu is 8 × 10 −5 to 1.5 × 10 −4 g, and the activation amount of Au is 0.0
1 × 10 −5 to 4 × 10 −5 g of ZnS: Cu, Al, Au phosphor is obtained.
陰極線管の緑色成分蛍光体を、ZnSを母体とし、Cu,Al
およびAuを付活剤として、母体1gに対してCuの付活量を
８×10-5〜1.5×10-4ｇ、Auの付活量を0.01×10-5〜４
×10-5ｇとし、かつ365nmの反射量が酸化マグネシウム
拡散板の反射率を100％とするとき、15％以上であるZn
S:Cu,Al,Au蛍光体とすると、紫外線での反射率の低下を
軽減して蛍光面形成時の露光時間を短縮できる。しか
も、蛍光体の発光色を最適に維持するばかりでなく、カ
ラー受像管に適用して白色輝度を改善することができ
る。The green component phosphor of the cathode ray tube is based on ZnS, Cu, Al
And Au as an activator, the activation amount of Cu is 8 × 10 −5 to 1.5 × 10 −4 g, and the activation amount of Au is 0.01 × 10 −5 to 4 × 1 g of the base.
× and 10 -5 g, and when the amount of reflection of 365nm to the reflectance of magnesium oxide diffusion plate is 100%, is 15% or more Zn
When the phosphor is made of S: Cu, Al, Au, it is possible to reduce a decrease in reflectance with ultraviolet rays and to shorten an exposure time for forming a phosphor screen. In addition, it is possible to not only maintain the emission color of the phosphor optimally, but also to improve the white luminance by applying to a color picture tube.
第１図ないし第６図はこの発明の実施例の説明図で、第
１図はその一実施例であるカラー受像管の構成を示す
図、第２図（ａ）および（ｂ）はそれぞれそのストライ
プ状蛍光体層からなる蛍光面の平面図および断面図、第
３図（ａ）および（ｂ）はそれぞれドット状蛍光体層か
らなる蛍光面の平面図および断面図、第４図はAu付活剤
濃度の異なるZnS:Cu,Al,Au蛍光体の分光反射率を従来の
ZnS:Cu,Al蛍光体のそれと比較して示す図、第５図は蛍
光体の分光反射率の測定方法説明図、第６図はAu付活剤
濃度の異なるZnS:Cu,Al,Au蛍光体の電流飽和特性を示す
図、第７図は従来のZnS:Cu,Al蛍光体のCu付活剤濃度と
色度値との関係を示す図、第８図は従来のZnS:Cu,Al,Au
蛍光体およびZnS:Cu,Al蛍光体の分光反射率を示す図で
ある。 10……パネル、13……蛍光面 14B,14G,14R……３色蛍光体層 15……光吸収層FIGS. 1 to 6 are explanatory views of an embodiment of the present invention. FIG. 1 is a view showing a structure of a color picture tube as one embodiment of the present invention, and FIGS. FIGS. 3 (a) and 3 (b) are a plan view and a cross-sectional view of a phosphor screen composed of a dot-shaped phosphor layer, respectively, and FIGS. The spectral reflectance of ZnS: Cu, Al, Au phosphors with different active agent concentrations
FIG. 5 is a diagram showing a comparison between the ZnS: Cu, Al phosphor and FIG. 5 is a diagram illustrating a method of measuring the spectral reflectance of the phosphor, and FIG. 6 is a ZnS: Cu, Al, Au phosphor having different Au activator concentrations. FIG. 7 is a diagram showing the current saturation characteristics of the phosphor, FIG. 7 is a diagram showing the relationship between the Cu activator concentration and the chromaticity value of the conventional ZnS: Cu, Al phosphor, and FIG. 8 is a diagram showing the conventional ZnS: Cu, Al , Au
FIG. 3 is a diagram showing the spectral reflectance of a phosphor and a ZnS: Cu, Al phosphor. 10 panel, 13 phosphor screen 14B, 14G, 14R three-color phosphor layer 15 light-absorbing layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−94281（ＪＰ，Ａ) 特開 昭54−97591（ＪＰ，Ａ) 特開 昭55−80486（ＪＰ，Ａ) 特開 昭56−59890（ＪＰ，Ａ) 特開 昭56−41649（ＪＰ，Ａ) 特開 昭56−42941（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C09K 11/00 - 11/89 H01J 29/20────────────────────────────────────────────────── (5) References JP-A-53-94281 (JP, A) JP-A-54-97591 (JP, A) JP-A-55-80486 (JP, A) JP-A-56-942 59890 (JP, A) JP-A-56-41649 (JP, A) JP-A-56-42941 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C09K 11 / 00-11 / 89 H01J 29/20
Claims (1)
して上記母体1gに対して上記Cuの付活量が８×10-5〜1.
5×10-4ｇ、上記Auの付活量が0.01×10-5〜４×10-5ｇ
であり、かつ365nmの反射率が酸化マグネシウム拡散板
の反射率を100％とするとき15％以上であるZnS:Cu,Al,A
u蛍光体からなる蛍光面を有することを特徴とする陰極
線管。[Claim 1] The ZnS as a host, Cu, activated amount of the Cu relative to the base 1g of Al and Au as an activator is 8 × 10 -5 ~1.
5 × 10 −4 g, the activation amount of Au is 0.01 × 10 −5 to 4 × 10 −5 g
ZnS: Cu, Al, A whose reflectance at 365 nm is 15% or more when the reflectance of the magnesium oxide diffuser is 100%.
A cathode ray tube having a phosphor screen made of a u phosphor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1092624A JP2795893B2 (en) | 1989-04-12 | 1989-04-12 | Cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1092624A JP2795893B2 (en) | 1989-04-12 | 1989-04-12 | Cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02269792A JPH02269792A (en) | 1990-11-05 |
| JP2795893B2 true JP2795893B2 (en) | 1998-09-10 |
Family
ID=14059596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1092624A Expired - Fee Related JP2795893B2 (en) | 1989-04-12 | 1989-04-12 | Cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2795893B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5394281A (en) * | 1977-01-31 | 1978-08-18 | Toshiba Corp | Green luminous zinc sulfide fluorescent substance |
| CA1132791A (en) * | 1978-01-03 | 1982-10-05 | Robert E. Dodds | Zinc sulfide phosphor coactivated with gold, copper and aluminum |
| US4316816A (en) * | 1978-12-06 | 1982-02-23 | Rca Corporation | Method for preparing copper-aluminum-gold-activated zinc-sulfide phosphors |
| JPS5641649A (en) * | 1979-09-14 | 1981-04-18 | Toshiba Corp | Cathode ray tube for color television set |
| JPS5642941A (en) * | 1979-09-18 | 1981-04-21 | Toshiba Corp | Cathode-ray tube for colour tv set |
| JPS6021713B2 (en) * | 1980-10-20 | 1985-05-29 | 化成オプトニクス株式会社 | green emitting phosphor |
-
1989
- 1989-04-12 JP JP1092624A patent/JP2795893B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02269792A (en) | 1990-11-05 |
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