Soft start power supply circuit and control method thereof, as well as display device

A power supply circuit and soft start technology, applied in lighting devices, output power conversion devices, electric light sources, etc., can solve problems such as power supply voltage overshoot

Active Publication Date: 2017-01-25
HEFEI BOE OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a soft-start power supply circuit, its control method, and a display device, which can solve the problem of overshooting of the power supply voltage output at the moment of power-on

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  • Soft start power supply circuit and control method thereof, as well as display device
  • Soft start power supply circuit and control method thereof, as well as display device
  • Soft start power supply circuit and control method thereof, as well as display device

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] An embodiment of the present invention provides a soft start power supply circuit, such as figure 1 As shown, it includes a soft start module 10 , a feedback calculation module 20 , a drive module 30 , a rectification and filtering module 40 and a sampling module 50 .

[0033] Among them, the soft start module 10 is connected to the input voltage terminal VIN, the ground terminal GND and the feedback voltage terminal FB, and is used to pull up the poten...

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Abstract

The embodiment of the invention provides a soft start power supply circuit and a control method thereof, as well as a display device, relates to the technical field of display drivers, and aims to solve the problem of overshooting of power supply voltage output at the moment of starting. The soft start power supply circuit comprises a soft start module for pulling up the potential at a feedback voltage end to a potential at an input voltage end, or pulling down the potential at the feedback voltage end to a potential at a grounding end, a feedback operation module for controlling on and off of the driving module according to the voltage of the feedback voltage end, a driving module for outputting a signal of the input voltage end to a rectification and filtration module in a start state, the rectification and filtration module for rectifying and filtering the signal output by the rectification and filtration module and outputting the signal to an output voltage end, and a sampling module for sampling the signal of the output voltage end and outputting the signal to the feedback voltage end. The soft start power supply circuit is used for realizing soft start in a power supply voltage outputting process.

Description

technical field [0001] The invention relates to the technical field of display driving, in particular to a soft-start power supply circuit, a control method thereof, and a display device. Background technique [0002] When a display device, such as an LCD (Liquid Crystal Display, liquid crystal display), is in use, the power supply device provides a power supply voltage thereto. Since the power supply device will bear a huge current impact at the moment of starting up, the power supply voltage output by the power supply device will overshoot, resulting in damage to transistors or other electronic components in the LCD. Contents of the invention [0003] Embodiments of the present invention provide a soft-start power supply circuit, its control method, and a display device, which can solve the problem of overshooting of the power supply voltage output at the moment of power-on. [0004] In order to achieve the above object, embodiments of the present invention adopt the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H05B44/00
CPCH02M1/36H05B45/3725H02M7/125H02M1/32H02M3/155
Inventor 彭晓飞黄家成
Owner HEFEI BOE OPTOELECTRONICS TECH
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