Patent Number: 7,821,512

Title: Apparatuses for generating analog driving voltages and common electrode voltages and methods of controlling the analog driving voltages and the common electrode voltages

Abstract: In apparatus for generating an analog driving voltage, a ripple amplitude determining unit compares the analog driving voltage with a reference voltage to determine a ripple level of the analog driving voltage and an analog driving voltage generating unit adjusts an analog driving voltage level based on the determined ripple level. In an apparatus for generating a common electrode voltage, a common electrode voltage ripple detecting unit compares ripple amplitude of the common electrode voltage with a ripple reference voltage to generate a common electrode voltage control signal and a common electrode voltage generating unit controls the common electrode voltage level based on the common electrode voltage control signal. Therefore, the analog driving voltage and the common electrode voltage are adjusted to appropriate voltage levels for reducing current consumption and flicker.

Inventors: Yi; Sang-Hak (Yongin-si, KR)

Assignee: Samsung Electronics Co., Ltd.

International Classification: G09G 3/36 (20060101); G09G 5/00 (20060101)

Expiration Date: 2018-10-26 0:00:00