Check patentability & draft patents in minutes with Patsnap Eureka AI!

Backlight module

A technology for backlight modules and modules, applied in the field of backlight modules, can solve the problems of power consumption, increased cost of DC-DC converters, and incompatibility with cost considerations.

Active Publication Date: 2010-12-22
SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the third light string 903 whose component characteristics least meet the requirements as an example, the turn-on voltage V of the light emitting diodes 900 contained therein is F Both are the lowest value of 3.1 volts. If the third light string 903 includes five LEDs 900 and a constant current of 120 milliamps (mA), the third light string will cause up to 5x (3.5 -3.1)x0.12=0.24W (watt) power consumption
[0005] In order to overcome this problem, although each of the light strings 90 can independently use a set of the DC-to-DC converters 91 to provide different driving voltages depending on the conduction voltage specifications of each of the light strings 90, but this method will greatly increase the cost of using the DC-to-DC converter 91, which is less in line with practical cost considerations

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
  • Backlight module
  • Backlight module
  • Backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments of the present invention are exemplified below and described in detail in conjunction with the accompanying drawings.

[0026] Please refer to figure 2 as shown, figure 2 A schematic diagram of component configuration of a backlight module according to a preferred embodiment of the present invention is disclosed, which mainly includes a light emitting diode module, a DC-to-DC converter 20 and a certain current control circuit 30 .

[0027] The LED module has a plurality of LEDs 100, and the LEDs 100 are arranged on a plane to form a light-emitting surface, so the present invention can be a direct-down type backlight module. The plurality of light emitting diodes 100 are evenly divided into a plurality of light strings 10, the light emitting diodes 100 of each of the light strings 10 are arranged in series, and each of the light strings 10 ha...

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 backlight module. The backlight module comprises a light-emitting diode module which is divided into a plurality of light strings by a plurality of light-emitting diodes averagely; the break-over voltage of each light-emitting diode is between a minimal break-over voltage value and a maximal break-over voltage value; and each light string comprises at least one light-emitting diode and a second light-emitting diode; the first light-emitting diode has the minimal break-over voltage value; and the second light-emitting diode has the maximal break-over voltage value. Therefore, the backlight module can contribute to reducing the power consumption of a constant current control circuit.

Description

【Technical field】 [0001] The invention relates to a backlight module, in particular to a backlight module which can effectively reduce the power loss of an internal constant current control circuit. 【Background technique】 [0002] Light-emitting diodes (LEDs) have the advantages of energy saving, long life, and small size. Therefore, using light-emitting diodes (LEDs) as backlight sources is a current development trend of liquid crystal displays (LCDs). However, there are still various problems to be overcome urgently in the application of light-emitting diodes in this respect. [0003] There are generally two types of light-emitting diodes used in backlights: side-lit and direct-lit. Please refer to figure 1 as shown, figure 1 Disclosed is an arrangement pattern of light-emitting diodes in an existing direct-lit backlight module. A plurality of light strings 90 are arranged side by side on the back of a liquid crystal panel as a light source for the backlight module, whe...

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): G09G3/34
CPCH05B33/0827G09G3/3406H05B45/46
Inventor 贺成明杨景元
Owner SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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