Display device, power supply circuit and power supply method of display screen
A technology of power supply circuit and display screen, which is applied in the direction of static indicators, instruments, etc., can solve the problems that the display screen cannot be detected, and achieve the effects of preventing display screen damage, simple circuit structure, and avoiding power-off protection
Active Publication Date: 2019-11-22
BOE TECH GRP CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the problem in the related technology is that the power-off protection during the power-on process will cause the subsequent detection of the display screen to fail.
Method used
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[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0028] A power supply circuit for a display screen, a display device having the circuit, and a power supply method for a display screen according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0029] figure 1 is a schematic block diagram of a power supply circuit of a display screen according to an embodiment of the present invention. Such as figure 1 As shown, the power supply circuit 100 of the display screen includes: a power chip 11 and a delay module 12 . ...
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The invention discloses a display device and a power supply circuit and a power supply method of a display screen. The power supply circuit includes: a power supply chip, the power supply chip has a first output terminal and a second output terminal, and the power supply chip provides a first output terminal through the first output terminal. Preset voltage, the power supply chip provides the second preset voltage through the second output terminal, wherein the first output terminal of the power supply chip is connected to the first power receiving terminal of the display screen, so as to supply the first preset voltage provided by the power supply chip The first power receiving end; the delay module, the input end of the delay module is connected with the second output end of the power supply chip, the output end of the delay module is connected with the second power receiving end of the display screen, and the delay module is used for power supply The second preset voltage provided by the chip is output with a delay, so that the second preset voltage provided by the power supply chip is delayed for a preset delay time and then supplied to the second power receiving end, so as to effectively avoid interruptions during power-on. Electrical protection to ensure the normal progress of subsequent detection.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a power supply circuit for a display screen, a display device with the circuit and a power supply method for a display screen. Background technique [0002] In related technologies, the first power supply ELVDD' and the second power supply ELVSS' are usually generated by a power chip. According to the design principle of the power chip, ELVSS' will be powered on after ELVDD' is powered on, but the power on ELVDD' and ELVSS' The time difference is very small. During the power-on process, the power chip will have two pulse currents when the voltage jumps. Due to external interference, the two pulse currents may form a large pulse current, and, if Figure 5 As shown, the ELVSS' generated by the power chip will be pulled up above 0V. When the power chip has a large current or ELVSS' is pulled up above 0V, the power chip will recognize and judge it as abnormal, and then perform power...
Claims
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IPC IPC(8): G09G3/20
CPCG09G3/20G09G3/3208G09G2330/025G09G2330/027G09G2330/08G09G2330/028G09G3/3258G09G2310/0243
Inventor 韩新斌王欣
Owner BOE TECH GRP CO LTD