Amoled driving circuit, display panel and display

Abstract

The invention discloses an AMOLED driving circuit, a display panel and a display. The AMOLED driving circuit includes: a capacitor; a first thin film transistor, including a first gate connected to a scanning signal line, a first source connected to a signal line, and A first drain connected to the capacitor; a second thin film transistor, including a second gate connected to the first drain, a second source connected to the first level, and a second drain connected to the second level polarity; the first OLED and the second OLED arranged in parallel between the source of the first level and the second thin film transistor, the polarity of the first OLED and the second OLED are opposite, the magnitude of the first level and the second level The relationship changes alternately within two adjacent frame periods, and the first OLED and the second OLED are alternately turned on within two adjacent frame periods. In the present invention, two OLEDs with opposite polarities are arranged in the AMOLED driving circuit, and the two OLEDs emit light alternately so that the driving thin film transistor works in the AC mode, thereby overcoming the Vth drift of the driving transistor caused by the DC bias.

Description

Technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to an AMOLED drive circuit, a display panel and a display. Background technique [0002] As a new generation of display technology, AMOLED (Active-matrix organic light emitting diode, active matrix organic light emitting diode or active matrix organic light emitting diode) has low power consumption, high color gamut, high brightness, high resolution, wide The viewing angle, high response speed and other advantages, so it is favored by the market. [0003] In TFT LCD, the brightness is controlled by voltage. As long as the accuracy of the pixel voltage is controlled to a few millivolts, the unevenness can be limited within the required range of about ±1%. This is easy to achieve, because in the TFT LCD, the pixel TFT does not need to transform the signal voltage to be transmitted, and is only used as a switch for directly transmitting the signal voltage from the data...

AI Technical Summary

Problems solved by technology

The actual AMOLED pixel development process proves that this is a difficult task. The threshold voltage and channel mobility of LTPS TFTs for AMOLED are not uniform enough in space. The threshold value of a-Si TFTs for AMOLED Voltage and mobility shift over time, and these imperfections can cause non-uniformity and instability in display brightness

For this reason, it is necessary to introduce various pixel compensation circuits to make the uniformity and stability of the luminous brightness of the display screen meet the requirements of the product, which makes the AMOLED drive circuit more complicated and increases the process cost.

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