Panel drive circuit and panel drive method

Abstract

The invention provides a panel drive circuit and a panel drive method. The panel drive circuit comprises a scanning control transistor (T1), a drive transistor (T2), a photo-transistor (T3), a storage capacitor (C1) and an OLED. The panel drive circuit further comprises a scan control end (Scan n), a data signal end (Data n), a power voltage input end (Vdd) and a low voltage input end (Vgl). The drive currents of the drive transistor (T2) are gray-scale currents (I1), the currents of the photo-transistor (T3) are environment lighting currents (I2), the gray-scale currents (I1) depend on gray-scale voltages stored in the storage capacitor (C1), and the environment lighting currents (I2) depend on environment lighting. The luminance of a panel depends on the sum of the gray-scale currents (I1) and the environment lighting currents (I2).

Description

technical field [0001] The invention relates to the field of display technology, in particular to a panel driving circuit and a panel driving method. Background technique [0002] As a new generation of display technology, AMOLED (Active Matrix / Organic Light Emitting Diode, active matrix organic light emitting diode panel) has the advantages of high brightness, wide color gamut, wide viewing angle, fast response, and small size. Generally, an AMOLED driving circuit is manufactured using LTPS (Low Temperature Poly-silicon, low temperature polysilicon) technology. The light-emitting device of the AMOLED is an OLED (Organic Light-Emitting Diode, organic light-emitting diode). Driven by the AMOLED driving circuit, when a current flows through the light-emitting device OLED, the OLED emits light. [0003] At present, the AMOLED drive circuit usually adopts the traditional 2T1C circuit, please refer to figure 1 , is a traditional AMOLED panel drive circuit 2T1C. Including: scan...

AI Technical Summary

Problems solved by technology

[0006] At present, due to the immaturity of LTPS technology, the threshold voltage Vth uniformity of the TFT manufactured by LTPS technology is very poor, and there is drift, which leads to the unevenness of the driving current flowing through the OLED, thereby reducing the uniformity of AMOLED brightness.

Since AMOLED is driven by current, the brightness of OLED is determined by the magnitude of the current. The higher the current, the higher the brightness. However, if it is always in high brightness working mode, its lifespan will be greatly reduced.

In addition, the yield rate of AMOLED backplane is still very low, and the lifespan and color stability of OLED light-emitting materials are not ideal. Therefore, the mass production of AMOLED is not yet high enough.

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