CN1104024C - Colour television picture tube - Google Patents

Colour television picture tube Download PDF

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Publication number
CN1104024C
CN1104024C CN98109684A CN98109684A CN1104024C CN 1104024 C CN1104024 C CN 1104024C CN 98109684 A CN98109684 A CN 98109684A CN 98109684 A CN98109684 A CN 98109684A CN 1104024 C CN1104024 C CN 1104024C
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CN
China
Prior art keywords
red
emitting
picture tube
blue
color
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Expired - Fee Related
Application number
CN98109684A
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Chinese (zh)
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CN1201248A (en
Inventor
小池教雄
松田秀三
高桥芳典
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Toshiba Corp
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Toshiba Corp
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Publication date
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Publication of CN1201248A publication Critical patent/CN1201248A/en
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Publication of CN1104024C publication Critical patent/CN1104024C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/26—Luminescent screens with superimposed luminescent layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/322—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television with adjacent dots
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/185—Luminescent screens measures against halo-phenomena

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  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Luminescent Compositions (AREA)

Abstract

The invention discloses a colour picture tube which has a phosphor screen composed of a blue-emitting phosphor, a green-emitting phosphor, and a red-emitting phosphor, the ratio (a/b) of the brightness a of the red-emitting phosphor to the brightness b of the blue-emitting phosphor is 1.40 or more. Thus, red colour purity is improved without a decrease of the brightness of the phosphor screen. Consequently, a colour picture tube with a wide color reproducible region can be provided.

Description

Color picture tube
Technical field
The present invention relates to color picture tube, the red color of particularly amplifying in the luminescent coating is reproduced the color picture tube in district.
Background technology
Usually, color picture tube has the shell of being made up of screen, glass awl and neck, and is provided with the luminescent coating of being made up of blue, green, red various light-emitting fluophors in the inside of screen.For this luminescent coating, by scanning through shadow mask by electron gun electrons emitted bundle, thus color display.As the key property of the luminescent coating of this class color picture tube the indigo plant of decision color intensity, colour contrast and color reproduction region, the purity of green, red various colors are arranged.The characteristic of these luminescent coatings depends primarily on the characteristics of luminescence of each fluorophor that constitutes luminescent coating.
Always, blue-fluorescence body and function ZnS: Ag, green fluorescence body and function ZnS: Cu, Au, Al, ZnS: Cu, Al or their mixture, red fluorescence body and function Y 2O 2S: Eu.
For red-emitting phosphors Y 2O 2S: Eu, its illuminant colour are roughly proportional with the concentration of activator Eu, as shown in table 1, and the redness in the high more illuminant colour of the concentration of Eu increases more, becomes the wide illuminant colour in color rendering district.Yet opposite luminosity descends.For this reason, will consider the balance of above-mentioned two characteristics for red-emitting phosphors, be the Y of 3 weight %～7 weight % usually with Eu concentration 2O 2S: Eu.
Table 1
Y 2O 2S: the Eu concentration (%) of Eu Y fluorophor The luminescent chromaticity of color picture tube Monochromatic brightness (relative value) Fluorophor monomer (relative value)
X Y
3.9 0.615 0.335 100 100
5.6 0.625 0.330 95 110
The listed numerical value of table 1 is that the arrangement pitches of fluorophor is the measured value of 17 inches the color picture tube of 0.25mm.
Yet in recent years, color picture tube for the picture tube of this respect demonstration usefulness, wish that its indigo plant, purity green, red various colors compare height always, and the color rendering district is wide as the increase that needs of demonstration usefulness such as computer.
But, as previously mentioned,, must improve the concentration of Eu for improving the color purity of red-emitting phosphors, this not only makes brightness reduce, and the cost of fluorophor is improved.
Summary of the invention
Thereby the luminosity that the purpose of this invention is to provide a kind of luminescent coating does not descend (concentration of Eu does not increase), red color purity improves and the wide color picture tube in color rendering district.
Color picture tube of the present invention comprises
The screen of light transmission, and be arranged on the luminescent coating that the inner face of described screen is made up of blue emitting phophor, green-emitting phosphor and red-emitting phosphors,
Above-mentioned blue emitting phophor is the ZnS of Ag concentration 0.015 weight %～0.08 weight %: Ag,
Above-mentioned red-emitting phosphors is the Y of Eu concentration 3.5 weight %～6.1 weight % 2O 2S: Eu,
The ratio a/b of the luminosity a of above-mentioned red-emitting phosphors and the luminosity b of above-mentioned blue emitting phophor is more than 1.40.
In addition, color picture tube of the present invention sandwiches colour filter between luminescent coating and screen.
Description of drawings
Fig. 1 is the cutaway view of the colorful visualization tubular construction of expression one embodiment of the present invention.
Fig. 2 A is the plane graph of luminescent coating one structure example in this color picture tube of expression.
Fig. 2 B is the sectional view of luminescent coating one structure example in this color picture tube of expression.
Fig. 3 is the cutaway view of the conversion example of this color picture tube of expression.
Fig. 4 A is an example of the spectral reflectance of presentation graphs 3 Smalt colour filters.
Fig. 4 B is an example of the spectral reflectance of green colour filter in the presentation graphs 3.
Fig. 4 C is an example of the spectral reflectance of red colour filter in the presentation graphs 3.
Fig. 5 (a) ~ (g) is the formation method of luminescent coating in the presentation graphs 2.
Fig. 6 is the ratio of the luminosity of the luminosity of the expression red-emitting phosphors that constitutes luminescent coating and blue emitting phophor, and the relation between the colourity X value of red-emitting phosphors.
Embodiment
Below, embodiments of the present invention are described.
Fig. 1 is the sketch of the colorful visualization tubular construction of expression one embodiment of the present invention.
As shown in Figure 1, color picture tube has the shell 4 of screen 1, glass awl 2 and neck 3 compositions of light transmission.The inside at screen 1 is provided with luminescent coating 5 described later, and in addition, side is faced luminescent coating 5 and disposed shadow mask 6 within it.On the other hand, in the neck 3 of shell 4, the electron gun 70 that disposes divergent bundle 6B, 6G, 6R is in the inboard of glass awl 2, disposes to be installed on the shadow mask 6, and makes the hypostracum (inner shell) 8 that is shielded by electron gun electrons emitted bundle 6B, 6G, 6R and external magnetic field.The outside at glass awl 2 disposes deviator 9, and this deviator 9 produces magnetic field, and this magnetic field of nationality makes electron gun 7 electrons emitted bundle 6B, 6G, 6R deflection.Electron beam 6B, 6G, 6R by deviator 9 deflections carry out the scanning of level and vertical direction to luminescent coating 5 behind shadow mask 6, thereby are shielding color display on 1.
As shown in Figure 2, luminescent coating 5 is formed on rectangular light absorbing zone, and on regularly arranged indigo plant in the circular gap by this light absorbing zone 10, green, red various luminous phosphor dots 11B, 11G, the dot matrix type that 11R constitutes.In addition, as shown in Figure 3, between phosphor dots 11B, 11G, 11R and screen 1, sandwich colour filter 12B, 12G, the 12R corresponding respectively with the color of each phosphor dots 11B, 11G, 11R.
Blue emitting phophor point 11B by ZnS: Ag form, green-emitting phosphor point 11G is by ZnS: Cu, Au, Al, ZnS: Cu, Al or their mixture form, red-emitting phosphors 11R is by Y 2O 2S: Eu forms.In this embodiment, the concentration of the activator Ag of blue emitting phophor ZnS: Ag is 0.015 weight %～0.08 weight %, red-emitting phosphors Y 2O 2The concentration of the activator Eu of S: Eu is 3.5 weight %～6.1 weight %.
In addition, in colour filter 12B, 12G shown in Figure 3,12R, blue color filter 12B system has the spectral reflectance shown in the curve 13 among Fig. 4 A by cobalt aluminate, ultramarine etc., and the high pigment of the luminous efficiency of transmission of above-mentioned blue emitting phophor is formed.Green color filter 12G system is by TiO 2-NiO-CoO-ZnO, CoO-Al 2O 3-Cr 2O 3-TiO 2Deng having a spectral reflectance shown in the curve 14 among Fig. 4 B, and the high pigment of the luminous efficiency of transmission of above-mentioned green-emitting phosphor is formed.Red colour filter body 12R has the spectral reflectance shown in the curve 15 among Fig. 4 C by ferrous oxide, anthraquinone etc., and the high pigment of the luminous efficiency of transmission of above-mentioned red-emitting phosphors is formed.
As shown in Figure 5, luminescent coating 5 can be by the photolithography of shadow mask as photomask formed.
At first, luminescent coating 5 as shown in Figure 2 is coated on screen 1 the inside to emulsion, dry and form photoresist 16 after, make this photoresist 16 through shadow mask 6 exposures, on photoresist 16, stamp figure (operation (a)) corresponding to the electron beam through-hole 17 of shadow mask 6.Secondly, the photoresist 16 that stamps figure is developed, form the maintenance film of forming by corresponding to the figure of the electron beam through-hole 17 of shadow mask 6 18 (operation (b)).At the inside of the screen 1 that has formed described diaphragm 18 painting black optical absorption coating, and dry, thus form optical absorption coating layer 19 (operation (c)).With remover the optical absorption coating layer 19 that is coated on the described diaphragm 18 is removed with diaphragm 18,, formed rectangular light absorbing zone 10 (operation (d)) with circular gap 20 in the inside of screen 1.
Then, in the inside of the screen 1 that has formed rectangular light absorbing zone 10, coating blue-light emitting body and emulsion are the fluorophor paste of Main Ingredients and Appearance, and dry, thereby form the phosphor slurry bed of material 21 (operation (e)).Then, the described phosphor slurry bed of material 21 is through shadow mask 6 exposures, behind the figure that stamps on the phosphor slurry bed of material 21 corresponding to the electron beam through-hole 17 of shadow mask 6, the phosphor slurry bed of material 21 that stamps figure is developed, thereby on the gap that sets of light absorbing zone 10, form blue emitting phophor point 11B (operation (f)).As for green-emitting phosphor and red-emitting phosphors, then repetitiousness carries out operation (e) and (f) the operation identical with the blue emitting phophor occasion, thereby forms green-emitting phosphor 11G and red-emitting phosphors 11R (operation (g)) on the gap that light absorbing zone 10 is set.
In addition, as shown in Figure 3, in the occasion that colour filter film 12B, 12G, 12R are set, after forming rectangular light absorbing zone 10, and before the coating fluorophor paste, coating is the dispersible pigment dispersion of main component with pigment, polyelectrolyte, emulsion, and carry out drying, thus forming coat of colo(u)r, above-mentioned phosphor dots occasion is identical with forming, usually after forming blue, green, red light colour filter 12B, 12G, 12R successively, form each phosphor dots 11B, 11G, 11R.
In described luminescent coating 15, owing to be the ZnS of 0.015 weight %～0.08 weight % with the concentration of activator Ag: Ag fluorophor formation blue emitting phophor point 11B, and be the Y of 3.5 weight %～6.1 weight % with the concentration of activator Eu 2O 2S: Eu constitutes red-emitting phosphors point 11R, and, the ratio a/b of the luminosity a of red-emitting phosphors and the luminosity 6 of blue emitting phophor is more than 1.40, thereby color picture tube is always compared, the luminosity that the present invention can make luminescent coating 5 does not reduce, red color purity improves, and the wide color picture tube in color rendering district.
That is, in the color picture tube with luminescent coating 5 of being made up of blue emitting phophor, green-emitting phosphor, red-emitting phosphors, the ratio a/b of the luminosity a of red-emitting phosphors and the luminosity b of blue emitting phophor greatly is related to the expansion in color rendering district.Its reason is: as from chromaticity coordinates as can be known, the luminescent chromaticity value X of blue emitting phophor is more much smaller than the luminescent chromaticity value X of red-emitting phosphors, and in color picture tube, at electron beam 6B, 6G, the district that passes through of 6R has disposed shadow mask 6 and hypostracum 8 etc., only make red-emitting phosphors grain 11R optionally luminous, make the luminous electron beam 6R of this red-emitting phosphors grain 11R they shadow mask 6 and hypostracum 8 etc. on collision back scattering, thereby make the blueness except that red-emitting phosphors point 13R luminous with green phosphor dots 11R and 11G, and the additive color mixing takes place, chromatic value is changed.
For investigation adds the chromatic value that the mixture of colours causes and changes by described, measure (17 inches of monochromatic tube only forming red-emitting phosphors point respectively, the arrangement pitches 0.28mm of phosphor dots) and form the emitting red light colourity of the homotype tri-color tube (common color picture tube) of blue, green, red phosphor dots, it the results are shown in table 2.Table 2 shows that the chromatic value X of emitting red light changes significantly.
Table 2
Emitting red light colourity
X Y
Monochromatic tube 0.638 0.345
Tri-color tube 0.608 0.343
So use the ZnS of Ag concentration 0.02 weight %: Ag is the Y of blue emitting phophor and Eu concentration 3.9 weight % 2O 2S: Eu is a red-emitting phosphors, and press preceding method as shown in Figure 3, in the color picture tube that has formed the luminescent coating 5 that disposes blueness, green, red colour filter 12B, 12G, the 12R arrangement pitches 0.28mm of phosphor dots (17 inches), when the ratio a/b of the luminosity b of the luminosity a of red fluorophor and blue emitting phophor changes, the chromatic value of emitting red light changed investigate.The coating weight of blue emitting phophor is 46 ± 1mg/16cm 2And roughly keep constant, and the coating weight of red-emitting phosphors is at 50mg ~ 75mg/16cm 2Range, the result of variations of its brightness ratio a/b is shown in table 3 and Fig. 6.
Table 3
Luminosity (the cd/m of the red-emitting phosphors of color picture tube 2) luminosity (cd/m of blue emitting phophor 2) The emitting red light colourity * of color picture tube
X Y
28.2/21.8＝1.294 0.608 0.334
28.6/21.4＝1.336 0.609 0.335
32.5/22.7＝1.432 0.613 0.336
31.3/21.3＝1.469 0.617 0.336
34.4/21.4＝1.607 0.624 0.338
* the beam split radiance meter MCPD-1000 that produces with big electronics corporation measures
As known by the foregoing results, the ratio a/b of the luminosity a of red-emitting phosphors and the luminosity b of blue emitting phophor is high more, and red luminescent chromaticity is increased.
On the other hand, for enlarging the color rendering district, the chromatic value X of emitting red light must be more than 0.612, and for satisfying this necessary condition, the ratio a/b of the luminosity a of red-emitting phosphors and the luminosity b of blue emitting phophor is being good more than 1.40, and this is undoubted.
In aforementioned embodiments, luminescent coating has been described by rectangular light absorbing zone, and the color picture tube that regularly arranged indigo plant, green, red various luminous fluorophor grain points are formed in the circular gap of this light absorbing zone, also the color picture tube that has colour filter between phosphor dots and screen has been described.And the present invention is applicable to that also luminescent coating is by rectangular light absorbing zone, and the color picture tube that regularly arranged indigo plant, green, red various light-emitting fluophor bands are formed in the banded gap of this light absorbing zone, also be applicable to they each fluorophor band and screen between have the color picture tube of colour filter, this can obtain the effect identical with aforementioned embodiments.
In addition, even the present invention also is suitable for the color picture tube that does not have foregoing rectangular or banded light absorbing zone, and can get same effect.
More than explanation, adopt the present invention, then in color picture tube with luminescent coating of forming by blue emitting phophor, green-emitting phosphor, red-emitting phosphors, the ratio a/b of the luminosity a by making red-emitting phosphors and the luminosity b of blue emitting phophor is more than 1.40, can make the brightness that does not make luminescent coating and reduce and red color purity is improved and the wide color picture tube in color rendering district.

Claims (2)

1. a color picture tube is characterized in that, comprises
The screen of light transmission, and be arranged on the luminescent coating that the inner face of described screen is made up of blue emitting phophor, green-emitting phosphor and red-emitting phosphors,
Described blue emitting phophor is the ZnS of Ag concentration 0.015 weight %～0.08 weight %: Ag,
Described red-emitting phosphors is the Y of Eu concentration 3.5 weight %～6.1 weight % 2O 2S: Eu,
The ratio a/b of the luminosity a of described red-emitting phosphors and the luminosity b of described blue emitting phophor is more than 1.40.
2. color picture tube as claimed in claim 1 is characterized in that,
Between luminescent coating and screen, sandwich colour filter.
CN98109684A 1997-06-04 1998-06-04 Colour television picture tube Expired - Fee Related CN1104024C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP146532/1997 1997-06-04
JP9146532A JPH10334823A (en) 1997-06-04 1997-06-04 Color image-receiving tube
JP146532/97 1997-06-04

Publications (2)

Publication Number Publication Date
CN1201248A CN1201248A (en) 1998-12-09
CN1104024C true CN1104024C (en) 2003-03-26

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CN98109684A Expired - Fee Related CN1104024C (en) 1997-06-04 1998-06-04 Colour television picture tube

Country Status (7)

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EP (1) EP0883155B1 (en)
JP (1) JPH10334823A (en)
KR (1) KR100271709B1 (en)
CN (1) CN1104024C (en)
DE (1) DE69809127T2 (en)
MY (1) MY120987A (en)
TW (1) TW388911B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100932991B1 (en) * 2003-11-29 2009-12-21 삼성에스디아이 주식회사 Field emission display device and manufacturing method thereof
CN102217030B (en) * 2008-11-14 2014-10-29 皇家飞利浦电子股份有限公司 Lamp
FR3022555B1 (en) * 2014-06-23 2017-12-22 Saint-Gobain Cristaux Et Detecteurs LIGHT-EMITTING MATERIAL WITH TEXTURED PHOTONIC LAYER

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129620A1 (en) * 1983-06-23 1985-01-02 International Business Machines Corporation Colour cathode ray tube with improved phosphor pattern
KR900003430B1 (en) * 1985-07-15 1990-05-18 가세이 오프토닉스 가부시끼가이샤 Electron beam-excited display tube
GB2240213A (en) * 1990-01-23 1991-07-24 British Broadcasting Corp Colour display device
EP0529098B1 (en) * 1991-03-14 1996-11-27 Kasei Optonix, Ltd. Color cathode-ray tube
EP0720201B1 (en) * 1994-12-26 1999-02-17 Kabushiki Kaisha Toshiba Display screen and method of manufacturing the same

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Publication number Publication date
EP0883155B1 (en) 2002-11-06
KR100271709B1 (en) 2000-11-15
DE69809127T2 (en) 2003-10-09
CN1201248A (en) 1998-12-09
MY120987A (en) 2005-12-30
KR19990006768A (en) 1999-01-25
TW388911B (en) 2000-05-01
JPH10334823A (en) 1998-12-18
DE69809127D1 (en) 2002-12-12
EP0883155A1 (en) 1998-12-09

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