Gate drive circuit of display panel and display device
A gate drive circuit, display panel technology, applied in static indicators, instruments, etc., can solve problems such as gate drive circuit burnout
Active Publication Date: 2019-11-12
CHONGQING HKC OPTOELECTRONICS TECH CO LTD +1
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Problems solved by technology
[0003] For example, the display panel includes a gate driving circuit, which is respectively connected to each scanning line of the display panel. Since the gate driving circuit needs to output a high-level signal or a low-level signal to the scanning line according to timing, to control the active circuit connected to the scanning line The switch is turned on or off. Therefore, when a short circuit occurs between adjacent scanning lines, the high-level voltage signal and the low-level voltage signal are conducted, and there is a risk of burning the gate drive circuit under long-term work.
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[0033] It should be understood that the terminology and specific structural and functional details disclosed herein are representative only for describing specific embodiments, but the application can be embodied in many alternative forms and should not be construed as merely Be limited by the examples set forth herein.
[0034] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating relative importance, or implicitly indicating the quantity of indicated technical features. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features; "plurality" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, possible presence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.
[0035] Al...
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The invention discloses a gate drive circuit of a display panel and a display device. The display panel is provided with a plurality of scanning lines. The gate drive circuit comprises a multi-stage gate drive sub-circuit, a multi-stage buffer and a plurality of protection circuits. The multi-stage gate drive sub-circuits are connected with the scanning lines in a one-to-one correspondence manner.The multi-stage buffers are in one-to-one correspondence with the gate drive sub-circuits. The plurality of protection circuits are in one-to-one correspondence with the scanning lines; the protection circuit comprises an error amplification unit, a comparison unit and a control module. The error amplification unit detects and amplifies the voltage difference between the input end and the outputend of the buffer to obtain an error amplification difference voltage; the comparison unit outputs a comparison result signal according to the error amplification difference voltage; the control module outputs a control signal according to the comparison result signal to control the buffer to be connected with or disconnected from the scanning line. The protection circuit provided by the inventioncan prevent the gate drive circuit from being burnt out due to short circuit between the scanning lines.
Description
technical field [0001] The present application relates to the field of display technology, in particular to a gate drive circuit of a display panel and a display device. Background technique [0002] With the development of large-scale, high-resolution, and high-resolution display panels, as well as the improvement of display quality requirements, high PPI (Pixels Per Inch, the number of pixels per inch) makes signal lines thinner and thinner. Smaller and smaller, the probability of short circuit between signal lines is greatly increased. [0003] For example, the display panel includes a gate driving circuit, which is respectively connected to each scanning line of the display panel. Since the gate driving circuit needs to output a high-level signal or a low-level signal to the scanning line according to timing, to control the active circuit connected to the scanning line The switch is turned on or off. Therefore, when a short circuit occurs between adjacent scanning lines...
Claims
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Login to View More IPC IPC(8): G09G3/20
CPCG09G3/20
Inventor 熊志
Owner CHONGQING HKC OPTOELECTRONICS TECH CO LTD