Active matrix organic light emitting diode display driving device

Abstract

The invention relates to an active matrix organic light emitting diode display driving device capable of switching majority frame frequencies, and the device comprises a time sequence control unit, a panel driving unit and a light emitting duty ratio control unit; the time sequence control unit extends the vertical blanking time according to an input frame frequency to change the display time and the vertical blanking time in a frame period corresponding to the frame frequency, so that the display time in the frame period corresponding to the frame frequency is equal to the reference display time; the panel driving unit is used for driving an active matrix organic light emitting diode display panel according to the input frame data and the frame time sequence and the display time and the vertical blanking time in the frame period corresponding to the frame frequency changed by the time sequence control unit, so as to display the input frame data on the active matrix organic light emitting diode display panel; the light-emitting duty ratio control unit applies a plurality of light-emitting pulses to the active matrix organic light-emitting diode display panel during a frame period corresponding to the frame frequency.

Description

technical field [0001] The invention relates to an active matrix organic light emitting diode display driving device, in particular to an active matrix organic light emitting diode display driving device capable of maintaining constant display brightness of the active matrix organic light emitting diode and having frame frequency switching. Background technique [0002] Due to the fast response characteristics of the active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, AMOLED) panel, it can greatly improve the dynamic display effect, but it needs to meet the power saving requirements in the static display, therefore, the frame rate (frame rate) Therefore, in the design of the AMOLED display driver, it is necessary to consider avoiding display variations caused by frame frequency switching during the switching process, and reducing the complexity of circuit design and difficulty in use. . [0003] With the current design of AMOLED display d...

AI Technical Summary

Problems solved by technology

[0003] With the current design of AMOLED display driving devices, in order to switch between different frame rates, it is generally necessary to use different panel driving timings (panel driving timing) to drive the AMOLED panel, which will result in different panel charging times, which in turn cause The brightness of the panel display changes; and because of the need to use a variety of different panel driving timings, the AMOLED display driving device requires a large memory to store a variety of different settings, and it is necessary to reserve enough conversion time in the timing control. This leads to difficulties in the design of the driving circuit; in addition, for the display brightness changes caused by different panel charging times, it not only needs to be compensated with other functions (such as Gamma) to reduce the change, but also affects other characteristics of the AMOLED panel (such as Mura)

[0004] Therefore, in the design of the existing AMOLED display driving device, there are still many deficiencies that need to be improved.

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