Drive circuit for active matrix organic luminous display device

Abstract

The present invention discloses a driving circuit for an active matrix organic illuminated display device; the driving circuit comprises: a driving circuit, a display pixel circuit; a signal regulation and correction circuit composed of a search table, a counter, a digital-analog converter (DAC), an analog-digital converter (ADC), and a driving and feedback controller; the driving circuit outputs line scan signal and display driving signal; the pixel circuit comprises a detection pixel circuit and a display pixel circuit, wherein, the detection pixel circuit is connected to the signal regulation and correction circuit, and the display pixel circuit is connected to the driving circuit; wherein, when the correction function is enabled, the signal regulation and correction circuit produces and regulates a detection driving signal for the detection pixel circuit according to the voltage feedback, and updates the search table according to the detection driving signal; during normal display, the signal regulation and correction circuit produces corrected display data from the display data input against the search table, and transmits the corrected display data to the driving circuit. The driving circuit can implement the most simplified design of the display pixels while avoiding complex line scan circuit.

Description

technical field [0001] The invention relates to a driving circuit of an active matrix organic light emitting display device, in particular to a driving circuit for improving the service life of the active matrix organic light emitting display device. Background technique [0002] An organic light emitting display device (OLED) is an active light emitting device. Compared with the current mainstream flat-panel display technology Thin Film Transistor Liquid Crystal Display (TFT-LCD), OLED has the advantages of high contrast, wide viewing angle, low power consumption, and thinner volume. It is one of the most concerned technologies in flat-panel display technology. [0003] OLEDs can be driven with either a passive matrix (PM) or an active matrix (AM). Compared with the PM driver, the AM driver has the advantages of larger displayed information capacity, lower power consumption, longer device life, and higher picture contrast. The PM drive is suitable for low-cost, simple dis...

AI Technical Summary

Problems solved by technology

[0011] The driving method still requires a current-programmed pixel circuit (although the actual drive uses voltage programming), and the pixel circuit cannot be simplified

In the sampling process of setting the programming voltage signal, the current drive signal is used, and the sampling takes a long time, and it may be necessary to use a timing sequence different from that programmed in normal display.

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