Charge recycling system and method

Patent metadata

Field	Value
Publication number	US-9201540-B2
Application number	US-201113227224-A
Country	US
Kind code	B2
Filing date	Sep 7, 2011
Priority date	Sep 7, 2011
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

Techniques for operating a touchscreen display are disclosed herein. In one embodiment, the touchscreen display device includes power regulation circuitry that supplies a first set of voltages to a display panel using high and low supply rails during a display period. During the blanking period following the display period, the high and low supply rails may be adjusted to a second set of voltages that provide for proper operation of touch-sensitive elements in the touchscreen display. Following the end of the blanking period, a portion of charge from the low supply rail is recycled by transferring the charge from the low supply rail back to the high supply rail to bring the high and low supply rails back to the first set of voltages for the next display period.

First claim

What is claimed is:

1. A method comprising:
providing a first high voltage and a first low voltage to a high power supply rail and a low power supply rail, respectively, of a power regulation device;
using the first high and low voltages to operate a display device during a display period;
at the end of the display period, detecting the start of a blanking period and providing a second high voltage and a second low voltage to the high power supply rail and the low power rail,…

Assignees

• Lee Yongman
• Apple Inc

Inventors

• Lee Yongman

Classifications

• G09G2310/08

  Physics · mapped topic

• G06F3/0412 Primary

  Physics · mapped topic

• G06F3/044

  Physics · mapped topic

• G09G3/3696

  Physics · mapped topic

• G09G2330/023

  Physics · mapped topic