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Tri-channel LED driver chip

An LED driver, three-channel technology, used in instruments, static indicators, etc., can solve problems such as the limitation of the number of LED driver chips cascaded

Inactive Publication Date: 2015-09-09
深圳市金誉半导体股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing light-emitting diodes are driven by LED driver chips, but the cascading between LED driver chips is limited by the number

Method used

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Embodiment Construction

[0020] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The invention provides a three-channel LED driver chip.

[0022] refer to figure 1 , figure 1 It is a module schematic diagram of the first embodiment of the three-channel LED driver chip of the present invention. A three-channel LED driver chip provided in this embodiment includes a signal analysis module 1 , a decoder 2 , a driving current control module 3 , an LED driver module 4 , an oscillation module 5 and an encoder 6 . The output end of the signal analysis module 1 is connected to the input end of the decoder 2, and the output end of the decoder 2 is connected to the decoding information input end of the drive current control module 3; the drive current control module 3 The output end of the LED driving module 4 is connected to the input end of the LED driving module 4; the first adjusting end of the...

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Abstract

The invention discloses a tri-channel LED driver chip. The tri-channel LED driver chip comprises a signal analysis module, a decoder, a driving current control module, an LED driving module, an oscillating module and an encoder, wherein the signal analysis module is used for receiving gray-level data inputted externally and outputting the gray-level data at the output end of the signal analysis module; the decoder is used for receiving the gray-level data outputted by the signal analysis module and decoding the gray-level data to output decoded information; the driving current control module is used for receiving the decoded information, confirming a PWM (pulse-width modulation) signal according to a preset mapping relation between the decoded information and the PWM signal and the received decoded information, and outputting the PWM signal at the output end of the driving current control module; the LED driving module is used for receiving the PWM signal outputted by the driving current control module and regulating driving current of a red-light diode, a green-light diode and a blue-light diode according to the PWM signal; the decoder is used for receiving the decoded information, encoding the decoded information, restoring the decoded information to the gray-level data and outputting the gray-level data at the output end of the encoder.

Description

technical field [0001] The invention relates to the technical field of LED driving circuits, in particular to a three-channel LED driving chip. Background technique [0002] The color of the displayed image is adjusted by adjusting the brightness of the red light diode, blue light diode and green light diode. Existing light-emitting diodes are driven by LED driver chips, but the number of cascaded LED driver chips is limited. Contents of the invention [0003] The main purpose of the present invention is to provide a three-channel LED driver chip that can be cascaded with each other and the number of cascaded is not limited. [0004] In order to achieve the above object, the present invention provides a three-channel LED driver chip, the three-channel LED driver chip includes: [0005] The signal analysis module is used to receive grayscale data input from the outside and output the grayscale data at its output terminal; [0006] a decoder, configured to receive graysca...

Claims

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Application Information

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IPC IPC(8): G09G3/32
Inventor 胡慧雄张堂强杨东霓
Owner 深圳市金誉半导体股份有限公司
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