Display driver with reduced voltage droop
AssigneeSynaptics Incorporated
InventorStephen L. Morein
Life of this patent
Estimating the term…
Abstract
A system and method for updating a display device comprises a first charge pump configured to drive a first gate line of the display device with a first voltage during a first period, a second charge pump configured to transition the first gate line from the first voltage to a second voltage during a second period, a third charge pump configured to drive the first gate line with the second voltage during a third period, and a fourth charge pump configured to transition the first gate line from the second voltage to the first voltage during a fourth period, wherein the first period occurs before the second period, the second period occurs before the third period, and the third period occurs before the fourth period.
Claims20
A display driver configured to update a display of a display device, the display driver comprising:
- a first charge pump configured to drive a first gate line of the display device with a first voltage during a first period;
- a second charge pump configured to transition the first gate line from the first voltage to a second voltage during a second period;
- a third charge pump configured to:
- drive the first gate line with the second voltage during a third period, and drive a second gate line of the display device with the second voltage during a fifth period;
- and
- a fourth charge pump configured to transition the first gate line from the second voltage to the first voltage during a fourth period, wherein the first period occurs before the second period, the second period occurs before the third period, the third period occurs before the fourth period, and the fourth period occurs before the fifth period.
A display device comprising:
- a plurality of gate lines coupled to sub-pixels;
- and
- a display driver coupled to the plurality of gate lines, the display driver comprises:
- a first charge pump configured to drive a first gate line of the display device with a first voltage during a first period;
- a second charge pump configured to transition the first gate line from the first voltage to a second voltage during a second period;
- a third charge pump configured to:
- drive the first gate line with the second voltage during a third period, and drive a second gate line of the display device with the second voltage during a fifth period;
- and
- a fourth charge pump configured to transition the first gate line from the second voltage to the first voltage during a fourth period, wherein the first period occurs before the second period, the second period occurs before the third period, the third period occurs before the fourth period, and the fourth period occurs before the fifth period.
A method for updating a display device comprising:
- coupling a first gate line of the display device with a first charge pump during a first period and driving the first gate line with a first voltage;
- coupling the first gate line with a fourth charge pump during a second period to transition the first gate line from the first voltage to a second voltage;
- coupling the first gate line with a third charge pump during a third period and driving the first gate line with the second voltage;
- coupling the first gate line with a second charge pump during a fourth period to transition the first gate line from the second voltage to the first voltage;
- and
- coupling a second gate line of the display device with the third charge pump during a fifth period and driving the second gate line with the second voltage,
- wherein the first period occurs before the second period, the second period occurs before the third period, the third period occurs before the fourth period, and the fourth period occurs before the fifth period.
Dependencies are inferred from the claim text.