Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving color reprodubility of liquid crystal display and its LED backlight module

A liquid crystal display, color reproduction technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of display color level limitation, insufficient color purity, lack of green, etc., to increase color saturation, improve color purity, improve The effect of the view effect

Inactive Publication Date: 2007-12-19
HUIZHOU BYD IND
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color gradation of the display screen will be limited, and the white field color temperature will be fixed, and the phenomenon of lack of green and red will appear during the color rendering process, that is, the color purity is not enough

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
  • Method for improving color reprodubility of liquid crystal display and its LED backlight module
  • Method for improving color reprodubility of liquid crystal display and its LED backlight module
  • Method for improving color reprodubility of liquid crystal display and its LED backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0029] Please refer to FIG. 5 , which is a schematic structural view of the green LED added in the present invention, including a sealing resin 10 packaged on a green LED chip 12, and a resin shell 11 is used to carry the green LED chip 12 and the package. The glue resin 10, in order not to change the luminous color of the chip, the encapsulating resin is a transparent glue.

[0030] Please refer to FIG. 6 , which is a schematic structural diagram of a red LED added in the present invention, including a sealing resin 14 , a resin case 15 , a red LED chip 16 and an external electrode 17 . The function of each component is the same as that of the green chip, but since the red chip is a single electrode, it only needs to be connected to the external electrode with one lead wire.

[0031] It can be seen from the spectrum diagram ...

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

A method for improving color reproducibility of liquid crystal display includes adding red light LED chips and green light LED chip in LED light source plate of LED back light module on liquid crystal display and arranging said red and green light LED chips alternatively in white light LED chips in order to carry out proper compensation on attenuated color for greatly raising scope of finally-outputted color domain through effective light-mixture.

Description

【Technical field】 [0001] The invention relates to a backlighting method and a backlight module of a liquid crystal display using LED as a light source. 【Background technique】 [0002] At present, due to the requirement of high brightness, general civilian liquid crystal displays use a light source called a cold cathode fluorescent lamp (CCFL). Although cold cathode fluorescent lamps are very mature in the field of liquid crystal displays, their shortcomings are also very obvious. Because of the limitation of its own luminous range, the typical CCFL backlight makes LCD monitors only reproduce less than 50% of the colors that can be transmitted by NTSC signals, and such performance is still far from the industrial-grade NTSC standard. CCFL backlight LCD monitors can also display colors up to 70% of the NTSC color gamut. Thirdly, the service life of CCFL is not long. After several years of use, the problems of reduced brightness and yellow color will appear, and the service l...

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 Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
Inventor 易蓉汪亮娟
Owner HUIZHOU BYD IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com