Supercharge Your Innovation With Domain-Expert AI Agents!

Colour television picture tube

A color picture tube and blue fluorescence technology, applied in the field of color picture tubes, can solve the problems of increased cost of phosphors, wider color reproduction area, reduced brightness and the like

Inactive Publication Date: 2003-03-26
KK TOSHIBA
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in recent years, the need for color picture tubes to be used as displays for computers and the like has increased. For the picture tubes used for display in this regard, it is expected that the purity of the blue, green, and red colors will be higher than the previous ones, and the color reproduction area will be wider.
[0008] However, as mentioned earlier, in order to improve the color purity of the red phosphor, the concentration of Eu must be increased, which not only reduces the brightness, but also increases the cost of the phosphor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Colour television picture tube
  • Colour television picture tube
  • Colour television picture tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Next, embodiments of the present invention will be described.

[0026] figure 1 It is a schematic diagram showing the structure of a color picture tube according to an embodiment of the present invention.

[0027] like figure 1 As shown, the color picture tube has a tube shell 4 composed of a light-transmitting screen 1 , a funnel 2 and a tube neck 3 . A phosphor layer 5 , which will be described later, is provided on the back of the screen 1 , and a shadow mask 6 is disposed facing the phosphor layer 5 inside the panel 1 . On the other hand, in the neck 3 of the tube envelope 4, an electron gun 70 emitting electron beams 6B, 6G, 6R is arranged inside the funnel 2, and an electron gun 70 mounted on the shadow mask 6 is arranged to make the electron beams emitted by the electron gun An inner shell 8 shielding the beams 6B, 6G, 6R from the external magnetic field. A deflection device 9 is arranged outside the funnel 2, and the deflection device 9 generates a magnetic ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

technical field [0001] The present invention relates to a color picture tube, in particular to a color picture tube which amplifies the red color reproduction area in the phosphor layer. Background technique [0002] Usually, a color picture tube has a tube shell composed of a screen, a funnel and a tube neck, and a phosphor layer composed of blue, green, and red light-emitting phosphors is arranged inside the screen. For the phosphor layer, a color image is displayed by scanning an electron beam emitted from an electron gun through a shadow mask. The important characteristics of the phosphor layer as this type of color picture tube are determining the color brightness, color contrast, and the purity of blue, green, and red colors in the color reproduction area. The properties of these phosphor layers mainly depend on the light-emitting properties of the respective phosphors constituting the phosphor layers. [0003] Traditionally, blue phosphors use ZnS: Ag, green phospho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/20H01J29/18H01J29/32
CPCH01J29/185H01J29/322H01J29/26
Inventor 小池教雄松田秀三高桥芳典
Owner KK TOSHIBA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com