Display device and circuit and method for supplying power for display screen
A technology of power supply circuit and display screen, applied in static indicators, instruments, etc., can solve the problem of failure of display screen detection, and achieve the effect of preventing display screen damage, avoiding power failure protection, and improving compatibility.
Active Publication Date: 2017-08-29
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 circuit and a method for supplying power for a display screen. The circuit comprises a power chip and a delay module. The power chip is provided with a first output tend and a second output end, first preset voltages can be provided by the power chip via the first output end, second preset voltages can be provided by the power chip via the second output end, and the first output end of the power chip is connected with a first power receiving end of the display screen, so that the first preset voltages provided by the power chip can be supplied for the first power receiving end; an input end of the delay module is connected with the second output end of the power chip, an output end of the delay module is connected with a second power receiving end of the display screen, and the delay module is used for carrying out delayed output on the second preset voltages provided by the power chip, so that the second preset voltages provided by the power chip can be supplied for the second power receiving end after being delayed by preset delay time. The display device, the circuit and the method have the advantages that power-off protection can be effectively prevented in power-on procedures as much as possible, and accordingly normal follow-up detection can be guaranteed.
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