Protection system for goa circuit and liquid crystal display panel
AssigneeShenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorShujhih Chen
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Abstract
A switching circuit is signally-connected to an initial trigger signal, a detection circuit and the GOA circuit. Upon a low voltage level of a low potential signal, the switching circuit is turned on to transmit the initial trigger signal to the GOA circuit so that the LCD panel works normally. Upon a high voltage level of the low potential signal, the switching circuit is turned off so that the GOA circuit does not conduct the initial trigger signal to protect the LCD panel from burn-out.
Claims20
A protection system for a gate on array (GOA) circuit, comprising:
- a detection circuit means, connected to the GOA circuit, and configured to generate a driving signal in response to a low potential signal of the GOA circuit;
- and
- a switching circuit signally-connected to an initial trigger signal, and connected to the detection circuit means, and the GOA circuit, and is configured to transmit the initial trigger signal to the GOA circuit according to the driving signal;
- wherein upon a low voltage level of the low potential signal, the switching circuit is turned on to transmit the initial trigger signal to the GOA circuit, and upon a high voltage level of the low potential signal, the switching circuit is turned off so that the GOA circuit does not receive the initial trigger signal.
A liquid crystal display (LCD) panel comprising a protection system of a gate on array (GOA) circuit, the protection system comprising a detection circuit means connected to the GOA circuit, and configured to generate a driving signal in response to a low potential signal of the GOA circuit;
- and a switching circuit signally-connected to an initial trigger signal, and connected to the detection circuit means and the GOA circuit, the switching circuit configured to transmit the initial trigger signal to the GOA circuit according to the driving signal;
- wherein upon a low voltage level of the low potential signal, the switching circuit is turned on to conduct the initial trigger signal to the GOA circuit;
- and upon a high voltage level of the low potential signal, the switching circuit is turned off so that the GOA circuit does not conduct the initial trigger signal, the GOA circuit comprising a plurality of stages of GOA units, except fora last stage of the GOA units, an output scan signal of each stage of the GOA units serves as a cascade signal of a next stage of the GOA units;
- except for a first stage of the GOA units, the output scan signal of each stage of the GOA units serves as a pull-down signal of a previous stage of the GOA units, and the pull-down signal is used to correct a waveform of the scan signal at the previous stage of the GOA units.
Dependencies are inferred from the claim text.