LIQUID CRYSTAL DISPLAY AND INVERSION DRIVING METHOD

• US 20120127142A1
• Filed: 08/18/2011
• Published: 05/24/2012
• Est. Priority Date: 11/24/2010
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Sung-Min, Yoo, Jeong-Geun, Lee, Seung-Jun
• Application Number:
  US13/212,943
• Publication Number:
  US 20120127142A1
• Time in Patent Office: Days
• US Class Current: 345/208
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0876 Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A liquid crystal display (LCD) ensuring excellent display quality and reducing power consumption is disclosed. The liquid crystal display (LCD) includes first and second polarity image display pixels, such that a polarity inversion of data is executed by line, column, and dot, and the polarity inversion of a common voltage is executed by frame. An inversion driving method using the liquid crystal display (LCD) is also disclosed.

Claims

1. A liquid crystal display (LCD), comprising:

one or more first polarity image display pixels, each comprising;

a first switching device configured to receive a first data voltage,

a first liquid crystal capacitor connected to an output terminal of the first switching device and to a first common electrode configured to receive a first common voltage, and

a first sustain capacitor coupled in parallel to the first liquid crystal capacitor and having an electrode connected to the first common electrode; and

one or more second polarity image display pixels, each comprising;

a second switching device configured to receive a second data voltage, wherein the polarity the first and second data voltages are opposite,

a second liquid crystal capacitor connected to an output terminal of the second switching device and to a second common electrode configured to receive a second common voltage, wherein the polarity the first and second common voltages are opposite, and

a second sustain capacitor coupled in parallel to the second liquid crystal capacitor and having an electrode connected to the second common electrode.

2. The liquid crystal display (LCD) of claim 1, wherein the polarity of the first and second common voltages is inverted each frame.

3. The liquid crystal display (LCD) of claim 1, wherein the first and second polarity image display pixels are arrayed on a liquid crystal panel and are configured to be driven with line inversion, column inversion, or dot inversion.

4. The liquid crystal display (LCD) of claim 1, wherein the first common electrode and the second common electrode are patterned to be engaged to each other with protrusion and depression shapes.

5. An inversion driving method of a liquid crystal display (LCD), the method comprising:

applying a first data voltage to a first switching device of a first polarity image display pixel comprising the first switching device, a first liquid crystal capacitor connected to an output terminal of the first switching device and to a first common electrode configured to receive a first common voltage, and a first sustain capacitor coupled in parallel to the first liquid crystal capacitor;

applying the first common voltage to the first common electrode and to one electrode of the first sustain capacitor;

applying a second data voltage having a polarity opposite the polarity of the first data voltage to a second switching device of a second polarity image display pixel comprising the second switching device, a second liquid crystal capacitor connected to an output terminal of the second switching device and to a second common electrode configured to receive a second common voltage, and a second sustain capacitor coupled in parallel to the second liquid crystal capacitor; and

applying the second common voltage to the second common electrode and one electrode of the second sustain capacitor, wherein the second common voltage has a polarity opposite the polarity of the first common voltage.

6. The inversion driving method of claim 5, wherein the polarity of the first and second common voltages is inverted each frame.

7. The inversion driving method of claim 5, wherein the first and second polarity image display pixels are arrayed on a liquid crystal panel and are configured to be driven with line inversion, column inversion or dot inversion.

8. The inversion driving method of claim 5, wherein the first common electrode and the second common electrode are patterned to be engaged to each other with protrusion and depression shapes.