Unlock instant, AI-driven research and patent intelligence for your innovation.

Backlight module containing dimming control circuit, and display

A dimming control circuit and circuit technology, applied in static indicators, electric lamp circuit layout, light source and other directions, can solve problems such as small brightness resolution and inability to meet user needs, etc.

Inactive Publication Date: 2014-09-10
INNOLUX CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although, the dimming control circuit 20 can make the brightness control signal S c The value of the external signal S r The value changes linearly, but in the external signal S r In case of limited value variation, the brightness control signal S c The value of is also limited. In other words, the resolution of the brightness that the light source 12 can present is relatively small, which cannot meet the needs of users.

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 containing dimming control circuit, and display
  • Backlight module containing dimming control circuit, and display
  • Backlight module containing dimming control circuit, and display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Please refer to image 3 , which is a schematic diagram illustrating the circuit structure of the dimming control circuit 100 according to an embodiment of the present invention. The dimming control circuit 100 includes a current source 110 , a current source 120 , a current switch 130 , a resistor R1 , a voltage switch 150 , a level judgment circuit 160 and a comparator 170 . The current switching switch 130 is electrically connected to the current source 110 and the current source 120 to output the first current I 1 or the second current I 2 , where the current source 110 is used to output the first current I 1 , and the current source 120 is used to output the second current I 2. The resistor R1 is electrically connected to the current switching switch 130 to receive the first current or the second current output by the current switching switch 130, wherein the terminal R1a of the resistor R1 is electrically connected to the reference voltage V g , and the termi...

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

Backlight module and display containing dimming control circuitry. The dimming control circuit includes a current switching switch, at least one resistor, a voltage switching switch, a level judgment circuit and a comparator. The current switch is used to select a current. The resistor is electrically connected to the current switch to generate a corresponding voltage value based on the current. The voltage switch is used to receive the corresponding voltage value and output a reference voltage. The level judgment circuit controls the current switching switch and the voltage switching switch according to the magnitude of the external input voltage. The comparator is used to receive a feedback voltage and the reference voltage, and output a brightness control signal. The invention also provides a backlight module and a display. The backlight module includes the dimming control circuit, a light source and an inverter. The display includes the backlight module and the display panel.

Description

technical field [0001] The invention relates to a dimming control circuit, in particular to a dimming control circuit applied to a backlight module. Background technique [0002] Due to the vigorous development of optoelectronic technology, more and more opportunities to come into contact with various communication or electronic products in life, such as: personal digital assistant (personal digital assistant; PDA), mobile phone, notebook computer, desktop monitor, Car monitors and more. Among them, the display device is a common device for these communication or electronic products, so the quality of the display device is closely related to the quality of these communication or electronic products. Therefore, it is an urgent goal for the display device to have the advantages of high image quality, small size, light weight, low driving voltage, and low power consumption. [0003] Generally speaking, current displays are equipped with a backlight module to provide backlight...

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): H05B41/38H05B37/02G09G3/00
Inventor 郑金波李永龙
Owner INNOLUX CORP