Turn on voltage supply circuit, method, failure analysis method and display device
A technology for turning on voltage and supplying circuits, applied in static indicators, instruments, etc., can solve the problems of large resistance workload, poor analysis methods and display devices, and difficulty in poor analysis, achieving uniform color, increasing convenience and efficiency. Effect
Active Publication Date: 2019-03-12
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a turn-on voltage supply circuit, method, defect analysis method and display device to solve the uneven color of the display screen caused by the attenuation of the turn-on voltage of the gate drive circuit with the long signal transmission distance in the prior art , and in the process of bad analysis of the gate drive circuit, it is necessary to repeatedly solder the resistors and the workload is heavy, and the repeated operation is very easy to damage the product, which makes the bad analysis difficult
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[0034] 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.
[0035] Such as figure 2 As shown, the turn-on voltage supply circuit described in the embodiment of the present invention is used for the M-level gate drive circuit ( figure 2 Not shown in ) to provide a turn-on voltage, M is an integer greater than 1, and the turn-on voltage supply circuit includes:
[0036] The voltage supply unit 21 is used to provide the M-level gate drive circuit with a turn-on voltage whose voltage value is within a predetermined volt...
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The invention provides an opening voltage supply circuit, a method, a failure analysis method and a display device. The turn-on voltage supply circuit includes a voltage supply unit and a switch unit; the voltage supply unit is used to respectively provide voltage values for the M-level gate drive circuit at a predetermined voltage value when the M-level gate drive circuit is in a normal working state The turn-on voltage within the range, or provide the corresponding turn-on voltage for the gate drive circuit when the gate drive circuit is in a bad analysis state; M is an integer greater than 1; when the gate drive circuit is in a bad analysis state The voltage supply unit includes an adjustable resistor connected between the turn-on reference voltage output end and the turn-on voltage input end of the gate drive circuit. The present invention can make the color of the display picture on the display panel uniform, and can also increase the convenience and efficiency of fault analysis of the grid drive circuit.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an opening voltage supply circuit, a method, a failure analysis method and a display device. Background technique [0002] In the field of TFT-LCD (Thin Film Transistor-Liquid Crystal Display, Thin Film Field Effect Transistor-Liquid Crystal Display) industry, there are more and more large-size display products. In medium and large-size display devices, gate drive circuits generally use COF (Chip On Flex, chip-on-chip) form Bonding (soldering) to Array Glass (array substrate). On the liquid crystal display panel, the Fanout (fan-out) resistance of each COF corresponding area is different, especially when the COF is designed with non-equal spacing, the difference of the Fanout resistance is more obvious. Such as figure 1 As shown, the turn-on voltage supply circuit of the existing gate drive circuit directly supplies the turn-on voltage to the multi-level gate drive circuit thr...
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IPC IPC(8): G09G3/36
CPCG09G3/3611G09G3/006G09G3/3677G09G3/3696G09G2330/12G09G3/2007G09G3/3688G09G2310/027
Inventor 华明胡新煜朱立伟郭鲁强孟智明王云飞
Owner BOE TECH GRP CO LTD