Liquid crystal display and method of driving the same

• US 20070069214A1
• Filed: 09/27/2006
• Published: 03/29/2007
• Est. Priority Date: 09/29/2005
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hyun
• Application Number:
  US11/528,041
• Publication Number:
  US 20070069214A1
• Time in Patent Office: Days
• US Class Current: 257/72
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G09G 2310/0281 Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
• 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 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A liquid crystal display with reduced power consumption and a method of driving the same, in which a liquid crystal display includes a liquid crystal panel including a lower substrate and an upper substrate. The lower substrate has a display region with liquid crystal cells formed at intersections of a plurality of horizontally extending gate lines and a plurality of vertically extending data lines. The upper substrate has color filter regions formed at areas corresponding to the liquid crystal cells. The liquid crystal display includes a data driver for applying data signals to the plurality of data lines, such that the polarities of the data signals are inverted at intervals of at least three liquid crystal cells in a vertical direction and at intervals of one liquid crystal cell in a horizontal direction. The color filter regions adjacent to each other in the vertical direction are formed with color filters having different colors. Also provided is a method of driving the liquid crystal display. Thus, since the polarity patterns of the data signals are inverted at intervals of at least three liquid crystal cells so as to control the number of swings of the data signals, it is possible to reduce power consumption of the liquid crystal display.

Claims

1. A liquid crystal display, comprising:

a liquid crystal panel including a lower substrate and an upper substrate, the lower substrate having a display region with liquid crystal cells formed at intersections of a plurality of horizontally extending gate lines and a plurality of vertically extending data lines, the upper substrate having color filter regions formed at areas corresponding to the liquid crystal cells; and

a data driver for applying data signals to the plurality of data lines such that polarities of the data signals are inverted at intervals of at least three liquid crystal cells in a vertical direction and at intervals of one liquid crystal cell in a horizontal direction,

wherein the color filter regions adjacent to each other in the vertical direction are formed with color filters having different colors.

2. The liquid crystal display as claimed in claim 1, wherein the color filter regions adjacent to each other in the horizontal direction are formed with color filters having an identical color.

3. The liquid crystal display as claimed in claim 1, wherein the lower substrate further comprises a peripheral region with a gate driver formed to apply gate signals to the plurality of gate lines.

4. The liquid crystal display as claimed in claim 3, further comprising a timing controller for controlling operations of the data driver and the gate driver using a synchronization signal, and for generating a polarity control signal for inverting the polarity of the data signal.

5. The liquid crystal display as claimed in claim 3, wherein the gate driver includes a first gate driver connected to odd gate lines and a second gate driver connected to even gate lines.

6. The liquid crystal display as claimed in claim 5, wherein the first gate driver and the second gate driver are formed in peripheral regions formed at left and right sides of the plurality of gate lines.

7. A liquid crystal display, comprising:

a liquid crystal panel including a lower substrate and an upper substrate, the lower substrate having a display region with liquid crystal cells formed at intersections of a plurality of horizontally extending gate lines and a plurality of vertically extending data lines, the upper substrate having color filter regions formed at areas corresponding to the liquid crystal cells; and

a data driver for applying data signals to the plurality of data lines such that polarities of the data signals are inverted at intervals of at least three liquid crystal cells in a vertical direction and at intervals of one liquid crystal cell in a horizontal direction,

wherein a horizontal length of the liquid crystal cells is longer than a vertical length thereof.

8. The liquid crystal display as claimed in claim 7, wherein the lower substrate further comprises a peripheral region with a gate driver formed to apply gate signals to the plurality of gate lines.

9. The liquid crystal display as claimed in claim 8, further comprising a timing controller for controlling operations of the data driver and the gate driver using a synchronization signal, and for generating a polarity control signal for inverting the polarity of the data signal.

10. The liquid crystal display as claimed in claim 8, wherein the gate driver includes a first gate driver connected to odd gate lines and a second gate driver connected to even gate lines.

11. A method of driving a liquid crystal display, the liquid crystal display including a liquid crystal panel including a lower substrate and an upper substrate, the lower substrate having a display region with liquid crystal cells formed at intersections of a plurality of horizontally extending gate lines and a plurality of vertically extending data lines and a peripheral region with a gate driver for applying gate signals to the plurality of gate lines, the upper substrate having color filters with different colors formed in areas facing the liquid crystal cells vertically adjacent to each other, and a data driver for applying data signals to the plurality of data lines, the method comprising the step of:

inverting polarities of the data signals at intervals of at least three liquid crystal cells in a vertical direction and at intervals of one liquid crystal cell in a horizontal direction.

12. The method as claimed in claim 11, further comprising the steps of:

sequentially applying the gate signals to the gate lines so as to turn on a plurality of liquid crystal cells connected to one gate line so that the data signals can be supplied to the liquid crystal cells; and

inverting the polarities of the data signals after applying the gate signals at least three times.

13. The method as claimed in claim 11, further comprising the steps of:

(a) sequentially applying the gate signals to the gate lines so as to turn on a plurality of liquid crystal cells connected to one gate line;

(b) applying a data signal with a first polarity to odd data lines and applying a data signal with a second polarity opposite to the first polarity to even data lines; and

(c) inverting the polarities of the first and second data signals after performing the steps (a) and (b) at least three times.