GIP circuit high supply voltage real-time monitoring and regulating circuit

Abstract

The invention provides a GIP circuit high supply voltage real-time monitoring and regulating circuit. The circuit comprises a signal generation module, a signal sampling module, a logical judgment module, a signal processing module and a high supply voltage regulating module, wherein a target TFT is determined through the signal generation module, the grid voltage, the source voltage and the drain voltage of the target TFT are acquired through the signal sampling module, the logical judgment module judges whether the target TFT works in a saturated area according to the acquired voltage, the signal processing module determines whether to regulate high supply voltage, and then the high supply voltage regulating module regulates high supply voltage. Real-time monitoring and correction of high supply voltage are achieved, it is guaranteed that high supply voltage is within a reasonable value range all the time, abnormal phenomena such as flickering and fluctuation are reduced, and then the image display quality of an AMOLED display screen is improved.

Description

technical field [0001] The invention relates to the field of plane display technology, in particular to a real-time monitoring and adjustment circuit for high power supply voltage of a GIP circuit. Background technique [0002] Active Matrix Organic Light Emitting Diode (AMOLED) display is a display technology used in TVs and mobile devices. It is used in portable electronic devices sensitive to power consumption due to its low power consumption, low cost and large size. It has broad application prospects. [0003] At present, in order to reduce the manufacturing cost of AMOLED and realize the purpose of narrow frame, AMOLED generally adopts GIP (gate in panel, door panel) technology in the manufacturing process, and directly integrates the gate driving circuit on the organic light emitting display panel. An organic light emitting display panel generally includes a display area for displaying images and a non-display area surrounding the display area, and the gate driving c...

AI Technical Summary

Problems solved by technology

[0005] Compared with LCD (liquid crystal display, liquid crystal display) display technology, the AMOLED drive circuit has stricter requirements on the GIP power supply voltage, especially for the high power supply voltage of the GIP circuit. When there is a downward fluctuation, it may cause malfunction of the GIP circuit 2 or the pixel circuit 3, and finally affect the normal transmission of AMOLED data signals and write pixels, causing different degrees of flickering, fluctuations or other abnormal phenomena in the display screen

[0006] The experiment also found that due to external interference, different display screens, screen temperature changes, etc., when VGH is pulled down to varying degrees, the GIP circuit may not operate according to the design value, resulting in a serious decline in the quality of the display screen.

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