A controller, electronic circuit, display device and frequency-elimination synchronizing converter

A technology of electronic circuits and display devices, which is applied in the direction of instruments, static indicators, cathode ray tube indicators, etc., and can solve problems such as display screen interference and ripples

Inactive Publication Date: 2006-08-02
BEYOND INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when the DC / DC converter is applied to the power supply of a liquid crystal display device, interference (or ripple) will appear in the horizontal or vertical direction of the display screen.

Method used

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  • A controller, electronic circuit, display device and frequency-elimination synchronizing converter
  • A controller, electronic circuit, display device and frequency-elimination synchronizing converter
  • A controller, electronic circuit, display device and frequency-elimination synchronizing converter

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Embodiment Construction

[0119] The following embodiments use a buck converter to illustrate the embodiments of the present invention. However, the DC / DC converter (DC / DC Converter) described in the present invention is not limited to the step-down converter, and can also be various types of power converters, such as boost converters, push-pull converters , flyback converter, forward converter (Forward converter), half-bridge converter (half-bridge converter) and full-bridge converter (full-bridge converter) are applicable to the present invention , but not limited to this.

[0120] Please refer to Figure 4 Shown is a schematic circuit block diagram of a DC / DC converter 400 according to a preferred embodiment of the present invention. All output circuits 415 and 425 are synchronized with each other. The DC / DC converter circuit 400 includes a first DC / DC converter 401 , a second DC / DC converter 402 and a controller 403 . In this embodiment, the first DC / DC converter 401 and the second DC / DC conver...

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Abstract

A controller for controlling at least two power circuits comprises a synchronous oscillator and a multi-phase PWM controller. The synchronous oscillator receives a timing signal for generating a synchronous control signal in which the timing signal is synchronous to a display signal. The multi-phase PWM controller receives the synchronous control signal for generating at least two PWM signals. The at least two PWM signals are coupled to the at least two power circuits for driving the at least two power circuits respectively. The at least two PWM signals are synchronous to the timing signal and with a phase shift between the at least two PWM signals.

Description

technical field [0001] The present invention relates to a converter (Converter) driving circuit for providing electric energy to multiple loads, such as a gate driver, a source driver, and a gamma voltage generator in a liquid crystal display device and a timing controller, especially a multi-phase converter drive circuit for synchronizing a multi-phase converter with a display signal. The converter is usually used in a display device, such as a liquid crystal display, a computer with a liquid crystal display (LCD computer) or a liquid crystal television. Background technique [0002] Liquid crystal displays (LCDs) technology has been widely used in display devices, such as liquid crystal screens, computers with liquid crystal displays, or liquid crystal televisions. US Patent No. (U.S Pat. No.): 6,731,259 discloses a known driving circuit for a liquid crystal display device. like figure 1 Shown is a schematic block diagram of a known liquid crystal display device, the kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG09G2330/06G09G3/3696G09G3/3648G09G5/18
Inventor 余仲哲蒋文杰李立民
Owner BEYOND INNOVATION TECH
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