Grid drive pulse compensation circuit and display device
A gate drive and compensation circuit technology, used in static indicators, instruments, etc., can solve problems such as poor panel display and failure to start normally, and achieve the effect of continuous output voltage and instant compensation of output voltage
Active Publication Date: 2012-11-21
AU OPTRONICS CORP
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Problems solved by technology
[0005] Another object of the present invention is to provide a display device that overcomes problems such as poor panel display or failure to start normally by improving the output of the gate drive circuit
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Embodiment Construction
[0052] see figure 1 , which shows a structural block diagram of a display device related to an embodiment of the present invention. like figure 1 As shown, the display device 10 includes a substrate 11 , a source driving circuit 13 , an array gate circuit 15 , a driving voltage source 17 and a gate driving pulse compensation circuit 19 . Wherein, the substrate 11 has a display area 112 and a peripheral area ( figure 1 (not shown in ), a thin film transistor array and a plurality of pixel electrodes electrically coupled to the thin film transistor array are formed in the display area 112 . The source driving circuit 13 is electrically coupled to the substrate 11 to provide the display data signal S to the display area 112 1 ~S m . The gate circuit 15 on the array is formed in the peripheral area of the substrate 11, which includes multiple stages of shift registers coupled in series to sequentially provide the gate driving pulse G to the display area 112 within a frequen...
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The invention relates to a grid drive pulse compensation circuit and a display device. The circuit is suitable for receiving grid drive pulses generated by a grid drive circuit in a frequency period and comprises a preprocessing circuit, a peak value detector, a stored charge release circuit, a voltage buffer and a charge pump circuit, wherein the pre-processing circuit is used for preprocessing the grid drive pulses to regulate the voltage of the grid drive pulses, transmitting the preprocessed grid drive pulses to the peak value detector to store charges to acquire a peak voltage and transmitting the preprocessed grid drive pulses to the stored charge release circuit to determine whether to provide a current release path for the peak value detector to release the charges; and the chargepump circuit acquires the peak voltage from the peak value detector through the voltage buffer and modulates the waveforms of the grid drive pulses according to the peak voltage. Besides, the invention also provides a display device using the grid drive pulse compensation circuit. The grid drive pulse compensation circuit can continuously and timely compensate the output voltage of the grid drivecircuit.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a gate drive pulse compensation circuit and a structure of a display device. Background technique [0002] The Gate-on-Array (GOA) circuit completed by the amorphous silicon (a-Si) process is easy to cause the current-voltage (I-V) characteristics of the thin film transistor to change when the environment (such as temperature, pressure, etc.) changes Change, so that the waveform of the gate drive pulse output by the gate circuit on the array changes (that is, the voltage difference between the highest voltage and the lowest voltage of the gate drive pulse is too small or too large), resulting in poor display or failure of the panel Normal startup, which in turn affects the reliability of the panel. Wherein, the gate circuit on the array is a gate drive circuit directly formed on the display substrate of the display device, which usually includes multiple stages of shift registe...
Claims
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IPC IPC(8): G09G3/20
Inventor 高伟仁郑少钧林卓贤石明昌黄家慷陈文彬林师勤
Owner AU OPTRONICS CORP