Display driver circuit, integrated circuit, OLED screen, device, and method
Example displaying methods and apparatus are described. In one example method, a display driver circuit is configured to provide a data signal in a data refresh frame of an organic light-emitting display (OLED) screen, and provide a keep voltage in a keep frame. The display driver circuit includes a plurality of data channels, and the OLED screen includes a plurality of pixel circuits. The plurality of data channels provide data signals for the plurality of pixel circuits in a one-to-one correspondence manner. The display driver circuit further includes a voltage keep channel, and the voltage keep channel provides keep voltages for the plurality of pixel circuits.
1 . A display driver circuit, configured to drive an organic light-emitting display (OLED) screen, provide a data signal in a data refresh frame, and provide a keep voltage in a plurality of keep frames, wherein the OLED screen is configured to operate in a plurality of screen refreshing frequency periods, each refresh frequency period comprises the data refresh frame and the plurality of keep frames, the plurality of keep frames are configured after the data refresh frame; and wherein the display driver circuit comprises:
a plurality of data channels that are configured to provide data signals for a plurality of pixel circuits of the OLED screen in a one-to-one correspondence manner, each of the plurality of pixel circuits comprising a data thin film transistor;
a voltage keep channel that is configured to provide keep voltages for the plurality of pixel circuits; and
a plurality of screen drive switches that are disposed in a one-to-one correspondence with the plurality of pixel circuits, and each of the plurality of screen drive switches is configured to select and provide a data signal and the keep voltage for a corresponding pixel circuit, wherein the keep voltage is configured to excite a carrier in each data thin film transistor to restore a respective drive current for driving the corresponding pixel circuit.
2 . The display driver circuit according to claim 1 , wherein the voltage keep channel comprises a low dropout regulator (LDO), and the LDO is configured to provide one keep voltage for each of the plurality of pixel circuits.
3 . The display driver circuit according to claim 1 , wherein the voltage keep channel comprises a dedicated driver circuit, and the dedicated driver circuit is configured to provide one keep voltage for each of the plurality of pixel circuits.
4 . The display driver circuit according to claim 1 , wherein each of the plurality of data channels comprises one driver circuit, the voltage keep channel is configured to reuse a driver circuit in a subset of the plurality of data channels, and a reused driver circuit is configured to provide one keep voltage for each of the plurality of pixel circuits.
5 . The display driver circuit according to claim 1 , wherein the plurality of pixel circuits comprise 1280 pixel circuits or 2560 pixel circuits.
6 . The display driver circuit according to claim 1 , wherein the OLED screen is a low-temperature polycrystalline oxide (LTPO) display.
7 . A method for a display driver circuit, wherein the display driver circuit is configured to drive an organic light-emitting display (OLED) screen, provide a data signal in a data refresh frame, and provide a keep voltage in a plurality of keep frames, wherein the display driver circuit comprises a plurality of data channels, a voltage keep channel, and a plurality of screen drive switches, wherein the OLED screen is configured to operate in a plurality of screen refreshing frequency periods, each refresh frequency period comprises the data refresh frame and the plurality of keep frames, the plurality of keep frames are configured after the data refresh frame, wherein the OLED screen comprises a plurality of pixel circuits each comprising a data thin film transistor, and the plurality of screen drive switches are disposed in a one-to-one correspondence with the plurality of pixel circuits; and the method comprises:
providing, by the plurality of data channels, data signals for the plurality of pixel circuits in a one-to-one correspondence manner;
providing, by the voltage keep channel, keep voltages for the plurality of pixel circuits; and
selecting and providing, by each of the plurality of screen drive switches, a data signal and the keep voltage for a corresponding pixel circuit, wherein the keep voltage is configured to excite a carrier in each data thin film transistor to restore a respective drive current for driving the corresponding pixel circuit.
8 . The method according to claim 7 , wherein:
the voltage keep channel comprises a low dropout regulator (LDO), and
the providing, by the voltage keep channel, keep voltages for the plurality of pixel circuits comprises:
providing, by the LDO, one keep voltage for each of the plurality of pixel circuits.
9 . The method according to claim 7 , wherein:
the voltage keep channel comprises a dedicated driver circuit, and
the providing, by the voltage keep channel, keep voltages for the plurality of pixel circuits comprises:
providing, by the dedicated driver circuit, one keep voltage for each of the plurality of pixel circuits.
10 . The method according to claim 7 , wherein:
each of the plurality of data channels comprises one driver circuit, the voltage keep channel is configured to reuse a driver circuit in a subset of the plurality of data channels, and
the providing, by the voltage keep channel, keep voltages for the plurality of pixel circuits comprises:
providing, by a reused driver circuit, one keep voltage for each of the plurality of pixel circuits.
11 . The method according to claim 7 , wherein the plurality of pixel circuits comprise 1280 pixel circuits or 2560 pixel circuits.
12 . The method according to claim 7 , wherein the OLED screen is a low-temperature polycrystalline oxide (LTPO) display.