Power supply circuit and display device

Abstract

The invention discloses a power supply circuit, which comprises a detection unit for providing a plurality of control signals according to the amplitude of an input power supply voltage; a first path,and a second path, wherein when the amplitude of the input power supply voltage is smaller than a second reference value, the first path and the second path are disconnected, when the amplitude of the input power supply voltage is larger than or equal to the first reference value, the first path is connected, the second path is disconnected, and when the amplitude of the input power supply voltage is larger than or equal to the second reference value and smaller than the first reference value, the second path is connected, and the first path is disconnected. The invention further discloses adisplay device. Different power supplies can be used for supplying power, proper working voltage of the driving module is guaranteed, noise and interference are reduced within a certain voltage range,and adverse effects on product quality are avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a power supply circuit and a display device. Background technique [0002] At present, the products of display devices, especially the driver modules used in notebook computers (NoteBook), have strict requirements on the accuracy of the power supply voltage. These driver chips can only work normally under the appropriate power supply voltage, and in some specific Drive abnormalities will occur within the power supply voltage range, which will affect the performance of the display device. [0003] figure 1 shows a structural block diagram of an existing display device, such as figure 1 As shown, an existing display device such as a notebook computer system includes a display panel and a system motherboard connected to the display panel. Corresponding drive modules and functional modules are arranged on the PCB of the display panel, and the system mainboard is connected to the ...

AI Technical Summary

Problems solved by technology

Noise and interference are not allowed when the notebook computer is in use, but it is found in the experiment that when the system motherboard is in a certain voltage range (such as 2.0V ~ 2.2V), there will be abnormal operation, and its output There is a certain voltage fluctuation in the power supply voltage to the PCB board, which is likely to cause noise and interference, which will lead to adverse effects such as misoperation of the drive module, making products such as display panels defective in design and use

[0004] If the chip is directly replaced, the product needs to be re-evaluated and verified, and the time and risks cannot be guaranteed

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