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

LED backlight brightness dynamic control method and system adopting same

A backlight brightness and dynamic control technology, which is applied to the system implementing the backlight brightness control method, and the field of dynamic control of LED backlight brightness, can solve the problems of TV image contrast drop, image contrast drop, image quality deterioration, etc., to improve image quality. Effect of dynamic contrast ratio and power consumption reduction

Active Publication Date: 2010-07-28
HISENSE VISUAL TECH CO LTD
View PDF7 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the rule of this partition control method is to pre-divide the image according to the position on the display screen, and then map the image to the corresponding area for partition control, this partition control of the LED backlight panel has inherent defects: due to the backlight area It is a pre-divided fixed area, and the gray value of the image signal in the same backlight area may vary greatly, which will inevitably lead to a decrease in the contrast of the TV image
The disadvantage is that the backlight area is pre-allocated according to the display screen, so that the gray value in the same backlight area may not be exactly the same, resulting in a decrease in image contrast and poor image quality

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
  • LED backlight brightness dynamic control method and system adopting same
  • LED backlight brightness dynamic control method and system adopting same
  • LED backlight brightness dynamic control method and system adopting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention provides a backlight control method. By detecting the brightness of the full-screen backlight, the change of the brightness of the full-screen backlight is controlled to improve the brightness of the screen and avoid light leakage defects. At the same time, the control of the brightness also improves the overall Subjective effects, and dynamic contrast.

[0033] figure 1 Shown in is a schematic diagram of an embodiment of using the method of the present invention to partition the brightness of the backlight. In the figure, it is shown that the backlight area of ​​the entire display image is divided into N×N (N is a natural number greater than 1) first-level control areas, each A first-level control area can be divided into M×M (M is a natural number greater than 1) second-level control areas, and the brightness control signal corresponding to each control area is represented as C 11 , C 12 ......C NN And the second-level control area in the firs...

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 relates to an LED backlight brightness dynamic control method and a system adopting the same, in particular to an LED backlight brightness control method and a system adopting the backlight brightness control method. The method comprises the following steps of: dividing an LED backlight area into control areas, and predetermining the threshold values of image gray contrast difference coefficients in the control areas; respectively calculating the image gray contrast difference coefficients in different control areas, and respectively comparing calculating results with the threshold values; if the calculating results are smaller than the threshold values, displaying the same backlight brightness in the control areas by adopting a single control mode; and if the calculating results are larger than the threshold values, displaying different backlight brightness in the control areas by adopting multiple control modes. Thus, the invention provides the LED backlight brightness dynamic control method of achieving the goals of improving the image dynamic contrast and reducing power consumption by utilizing an image information dynamic allocation backlight area.

Description

technical field [0001] The invention relates to a light emission control method using liquid crystal and controlling light emission from an independent light source for displaying images, in particular to a dynamic control method of LED backlight brightness, and also to a system for realizing the backlight brightness control method. Background technique [0002] With the continuous development of TV technology, LED, as a new type of backlight for LCD TVs, has the characteristics of wide color gamut and low power consumption compared with the CCFL backlight used in LCDs. At the same time, the appearance of LED backlight makes it possible for people to dynamically control the brightness of the backlight according to the image, so the current LED backlight technology has been widely used in the field of TV manufacturing. [0003] In order to further improve the performance of LED TVs, obtain higher image contrast, and achieve lower power consumption, dynamic control of LED back...

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
IPC IPC(8): H05B37/02G02F1/13357
Inventor 徐志强
Owner HISENSE VISUAL TECH CO LTD
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