IP Library Granted Patent US 10,388,236
Granted Patent B2
US 10,388,236 · App. 15/473,090 · Granted Aug 20, 2019

Liquid crystal display device

Inventors: Hideyuki Noguchi (Hyogo, JP); Toshiki Onishi (Shiga, JP); Yoshihisa Ooishi (Kanagawa, JP)
Assignee: Panasonic Liquid Crystal Display Co., Ltd.
G09G3/3614G09G3/3648G09G3/3688G09G2320/0247
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Quick Facts
Patent No.
US 10,388,236
App. No.
15/473,090
Granted
Aug 20, 2019
Kind
B2
Abstract

A liquid crystal display device that performs phase inversion drive in which a phase of a polarity of a data voltage is inverted in predetermined timing while performing frame inversion drive in which a positive-polarity data voltage and a negative-polarity data voltage are alternately output to a data line in each one or plurality of frames. In a first frame immediately after the phase is inverted, the source driver outputs a second data voltage to the data line in initial first periods of a horizontal scanning period, the second data voltage being closer to the common voltage than a first data voltage corresponding to input image data, and outputs the first data voltage to the data line in a second period after the first period in the horizontal scanning period.

Claims (11)

1. A liquid crystal display device that performs phase inversion drive in which a phase of a polarity of a data voltage is inverted in predetermined timing while performing frame inversion drive in which a positive-polarity data voltage and a negative-polarity data voltage are alternately output to a data line in each one or plurality of frames, the liquid crystal display device comprising:

a source driver that outputs the data voltage to the data line;

a pixel electrode to which the data voltage is applied; and

a common electrode that is disposed opposite to the pixel electrode and to which a common voltage is applied,

wherein, in a first frame immediately after the phase is inverted, the source driver

outputs a second data voltage to the data line in an initial first period of a horizontal scanning period, and

outputs the first data voltage to the data line in a second period after the first period in the horizontal scanning period, and

the second data voltage is the common voltage.

2. The liquid crystal display device according to claim 1 , wherein the source driver outputs the second data voltage to the data line in the first period in all the horizontal scanning periods of the first frame.

3. The liquid crystal display device according to claim 1 , wherein column line inversion drive, in which the polarities of the data voltages supplied to the two adjacent data lines differ from each other, is further performed.

4. The liquid crystal display device according to claim 1 , wherein row line inversion drive, in which the polarity of the data voltage supplied to the data line varies in each row line in a row direction orthogonal to a column direction in which the data line extends, is further performed.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 064292/0775 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2017
From: NOGUCHI, HIDEYUKI; ONISHI, TOSHIKI; OOISHI, YOSHIHISA
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 043528/0206 →
Priority Claims (1)
JP 2016-070097 · Mar 31, 2016 · national
Continuity (1)
Related Publication 20170287420A1 · Oct 5, 2017