Device and method for controlling a display panel
A display driver includes signal supply circuitry and a power source controller. The signal supply circuitry is configured to update a display panel during a refresh period and not update the display panel during a non-refresh period that follows the refresh period. The power source controller is configured to modify a high-side power source voltage supplied to the display panel at least during the non-refresh period.
1. A display driver, comprising:
signal supply circuitry configured to update a display panel during a refresh period and not update the display panel during a non-refresh period that follows the refresh period; and
a power source controller configured to modify a power source voltage supplied to the display panel at least during the non-refresh period,
wherein the display driver comprises a first mode and a second mode,
wherein a first frame period includes a first front porch period in the first mode,
wherein a second frame period includes a second front porch period longer than the first front porch period in the second mode, and
wherein the non-refresh period comprises the second front porch period.
2. The display driver of claim 1 , modifying the power source voltage comprises modifying a high-side power source voltage.
3. The display driver of claim 1 , wherein modifying the power source voltage comprises increasing a high-side power source voltage.
4. The display driver of claim 1 , wherein modifying the power source voltage comprises modifying the power source voltage during the refresh period and the non-refresh period.
5. The display driver of claim 1 , wherein modifying the power source voltage comprises increasing a high-side power source voltage to compensate a decrease in a display brightness level of the display panel.
6. The display driver of claim 1 , wherein the power source controller is configured to control the power source voltage such that a change rate of the power source voltage is variable.
7. The display driver of claim 1 , wherein the power source controller is configured to control the power source voltage using predetermined control data stored in a storage of the display driver.
8. The display driver of claim 1 , wherein modifying the power source voltage comprises modifying a low-side power source voltage.
9. The display driver of claim 1 , wherein modifying the power source voltage comprises decreasing a low-side power source voltage.
10. The display driver of claim 1 , wherein the signal supply circuitry is further configured to modify a ratio of a number of pixel circuits that emit light to a total number of pixel circuits of the display panel during the non-refresh period.
11. The display driver of claim 10 , wherein modifying the ratio comprises increasing the ratio during the non-refresh period.
12. A display device, comprising:
a display panel; and
a display driver configured to:
update the display panel during a refresh period and not update the display panel during a non-refresh period that follows the refresh period; and
modify a power source voltage supplied to the display panel at least during the non-refresh period,
wherein the display driver comprises a first mode and a second mode,
wherein a first frame period includes a first front porch period in the first mode,
wherein a second frame period includes a second front porch period longer than the first front porch period in the second mode, and
wherein the non-refresh period comprises the second front porch period.
13. The display device of claim 12 , wherein the display panel comprises a pixel circuit configured to operate on the power source voltage.
14. The display device of claim 12 , wherein modifying the power source voltage comprises increasing a high-side power source voltage.
15. The display device of claim 12 , wherein modifying the power source voltage comprises modifying a low-side power source voltage, and
wherein the display panel comprises a pixel circuit configured to operate on the low-side power source voltage.
16. A method comprising:
updating a display panel of a display device during a refresh period;
not updating the display panel during a non-refresh period that follows the refresh period; and
modifying a power source voltage supplied to the display panel at least during the non-refresh period,
wherein the display device comprises a first mode and a second mode,
wherein a first frame period includes a first front porch period in the first mode,
wherein a second frame period includes a second front porch period longer than the first front porch period in the second mode, and
wherein the non-refresh period comprises the second front porch period.
17. The method of claim 16 , wherein modifying the power source voltage comprises increasing a high-side power source voltage.
18. The method of claim 16 , wherein modifying the power source voltage comprises decreasing a low-side power source voltage supplied to the display panel at least during the non-refresh period.
19. The method of claim 16 , further comprising modifying a ratio of a number of pixel circuits that emit light to a total number of pixel circuits of the display panel during the non-refresh period.