| 摘要 |
The present invention provides a driving device and a driving method of an AMOLED. The AMOLED driving device includes a control module (1), a voltage module (2), and a display panel (3). The control module (1) includes a timing control unit (11), a data output unit (12), a black screen output unit (13), and a data output selection unit (14). The voltage module (2) includes a Gamma constant voltage unit (21) and an OLED driving voltage unit (22). The timing control unit (11) generates a frame control signal (Frame_ctr) that controls the data output selection unit (14) and the OLED driving voltage unit (22) so that a normal image is output in one frame, while a black screen is output in another frame. During the period of outputting of the black screen, a preset positive potential is switched to connect to a power supply negative potential so as to prevent the occurrence of a display defect of residual image and effectively suppress threshold voltage shifting of a second transistor. |
| 主权项 |
1. An active matrix organic light emitting diode (AMOLED) driving device, comprising: a control module, a voltage module, and a display panel, wherein the control module comprises a timing control unit, a data output unit, a black screen output unit and a data output selection unit, and the voltage module comprises a Gamma constant voltage unit and an organic light emitting diode (OLED) driving voltage unit;
wherein the display panel comprises a plurality of pixel structures that are arranged in the form of an array, and each of the pixel structures comprises a first transistor, a second transistor, a storage capacitor, and an organic light emitting diode; wherein the timing control unit generates a frame control signal that controls the data output selection unit so that when the frame control signal is a high level, the data output selection unit outputs a normal image signal to the display panel; and when the frame control signal is a low level, the data output selection unit outputs a black screen to the display panel; and when a normal image signal is output in one frame, a black screen is output in the next frame; and wherein the frame control signal generated by the timing control unit also is configured to control the OLED driving voltage unit so that the OLED driving voltage unit supplies a power supply positive potential and a power supply negative potential to the organic light emitting diode; when the frame control signal is a high level, a normal image signal is output, and the power supply negative potential is connected to a preset negative potential output from the OLED driving voltage unit; and when the frame control signal is a low level, a black screen is output, the power supply negative potential is connected to a preset positive potential output from the OLED driving voltage unit; and the preset positive potential is higher than the power supply positive potential. |
