Xiaomi’s new patent shows how to lower power consumption when displaying black pixels

A few days ago, Mobile Software Co., Ltd. published a Xiaomi patent for “Display Screen Driving Method and Device”, which was applied for on September 5, 2019, and the application publication number is CN112447138A.

From the schematics, we can see that the display of the AMOLED screen module is excited by the OLED matrix molecules and emits light that is stored in advance or integrated in the thin film transistor TFT as a set of switches to control the current flow to each pixel. Among them, a single pixel does not work when displaying black. So it has a low power consumption when displaying dark colors.

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As the size of the display screen of the terminal increases, the driving capability of a single display driver integrated circuit DDIC cannot meet the demand for large screens. Therefore, a way of using dual DDICs or even more DDICs to drive the display screen at the same time has emerged.

According to the patent introduction, the present disclosure relates to a method and device for driving a display screen, and relates to OLED screen technology.

A method for driving a display screen provided by the present disclosure includes:

determining a display mode of a multi-drive display screen;

when the display mode of the multi-drive display screen is a preset display mode, controlling one or of the multi-drive display screen state of the plurality of driving chips is a normal working state. Wherein the number of driving chips in a normal working state at the same time is less than the total number of driving chips of the multi-drive display screen. And the preset display mode includes lighting the screen’s upper part of the pixels.

The technical solution of the present disclosure uses part of the drive chips in the multi-drive display screen for normal operation, thereby illuminating part of the pixels on the screen for displaying screen content. The power consumption of devices corresponding to multi-drive display screens (such as smartphones or other personal devices) is reduced.

VIA