SI Yu-juan, FENG Kai, LANG Liu-qi, LIU Shi-yong. A Driving Circuit Design for Active Matrix Organic Light Emitting Diode Display[J]. Chinese Journal of Luminescence, 2005,26(2): 257-261
SI Yu-juan, FENG Kai, LANG Liu-qi, LIU Shi-yong. A Driving Circuit Design for Active Matrix Organic Light Emitting Diode Display[J]. Chinese Journal of Luminescence, 2005,26(2): 257-261DOI:
A Driving Circuit Design for Active Matrix Organic Light Emitting Diode Display
the driving circuit design was introduced for active matrix organic light emitting diode display
the pixel electrode circuit was discussed. And the method was proposed for some peripheral integration of driving circuits on substrate using complementary poly-silicon thin film transistor (TFT) to reduce the lead lines between the OLED display and peripheral circuitry
and simplify the peripheral driving complexity. Based on the two-TFT pixel electrode circuit
we design the driving circuit on the panel. Firstly a kind of shift register circuit structure was given
and using this circuit and some accessory gate circuits the gate driver was composed for the scan lines. Further the data sampling circuit on panel was constructed. For reduce the connection lines with the peripheral driver
the data lines were divide into M blocks. When the gate bus line is enabled
the blocks are in operation one by one. Consequently the analog signal from the peripheral driver will transmit to the data lines. This data voltage is applied on the two-TFT pixel circuit to drive the OLED. Because the data voltage is different analog signal
the OLED current is different as the data voltage and its luminance change with the OLED current. By AIM-Spice software we simulate the driver integrated on the panel
and verify the gate driver and data sample circuit function. A specific programmable application specific driver IC design was proposed for active matrix organic light emitting diode display
it is achieved by using CPLD (Complex Programmable Logic Device) chip. We make use of the hardware description language VHDL to program the CPLD and generate the external control signal for active matrix OLED panel. And at the same time CPLD operates the data process and outputs the digital display data with grey scale
those digital data were converted to analog voltage signal and transmitted to data sampling circuitry on panel. Our design results were verified by simulation and synthesis. At last the outline of the specific application IC and OLED display was shown.