Display device

• US 8,593,386 B2
• Filed: 06/09/2008
• Issued: 11/26/2013
• Est. Priority Date: 08/01/2007
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Dong-gyu
• Primary Examiner(s): Wang, Quan-Zhen
• Assistant Examiner(s): DAVIS, TONY O
• Application Number:
  US12/135,783
• Publication Number:
  US 20090033608A1
• Time in Patent Office: 1,996 Days
• Field of Search: 345/88, 345/92, 257/154
• US Class Current: 345/92
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/133742 for homeotropic alignment
• CPC Class Codes: G02F 1/133757 with different alignment orientations
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• 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

Abstract

A display device includes: a first display substrate having a plurality of pixel electrodes, a plurality of data lines disposed parallel with each other and that cross a center portion of the pixel electrodes, a plurality of gate lines that cross the data lines, and a plurality of driving thin film transistors connected with the data lines, the gate lines and the pixel electrodes; a second display substrate disposed opposite to the first display substrate having a common electrode, a liquid crystal layer disposed between the first display substrate and the second display substrate; wherein one of the data lines supplies a data voltage to the pixel electrodes crossed by the one of the data lines and to the pixel electrodes crossed by the adjacent one of the data lines alternately along a longitudinal direction of the data lines.

Claims

1. A display device comprising:

a first display substrate which comprises a plurality of pixel electrodes, a plurality of data lines disposed parallel with each other and overlapping a center portion of the pixel electrodes in a direction crossing a longitudinal direction of the data lines in a plan view of the display device, a plurality of gate lines which cross the data lines, and a plurality of driving thin film transistors which are respectively connected with the data lines, the gate lines and the pixel electrodes;

a second display substrate which is disposed opposite to the first display substrate and comprises a common electrode, and;

a liquid crystal layer which is disposed between the first display substrate and the second display substrate;

wherein one of the data lines supplies a data voltage to pixel electrodes overlapped with the one of the data lines and to pixel electrodes overlapped with an adjacent one of the data lines alternately along the longitudinal direction of the data lines.

2. The display device according to claim 1, wherein the pixel electrodes connected to the one of the data lines are supplied with the same polarity of the data voltage and are supplied with a different polarity of the data voltage from the adjacent data lines.

3. The display device according to claim 2, wherein the each driving thin film transistor is connected with only one data line among the plurality of data lines and is disposed at a position corresponding to an edge portion of the each pixel electrode, the one of the data lines is connected alternately with the driving thin film transistors disposed at the opposite sides of the data lines along the longitudinal direction of the data lines and, the plurality of driving thin film transistors are connected with the pixel electrodes disposed at the same side.

4. The display device according to claim 2, wherein the each driving thin film transistor is connected with only one data line among the plurality of data lines and is disposed at a position corresponding to an edge portion of the each pixel electrode, the one of the data lines is connected with the adjacent driving thin film transistors disposed at the same side, and the plurality of driving thin film transistors are connected alternately with the pixel electrodes disposed at opposite sides of the data lines along the longitudinal direction of the data lines.

5. The display device according to claim 2, wherein the pixel electrodes comprise first pixel electrodes and second pixel electrodes which are adjacent to the first pixel electrodes in the longitudinal direction of the data lines and are supplied with the data voltage from the data line adjacent to the one data line, the first pixel electrodes comprise first major pixel electrodes and first minor pixel electrodes and, the second pixel electrodes comprise second major pixel electrode and the second minor pixel electrode.

6. The display device according to claim 5, wherein the plurality of gate lines comprise first gate lines and second gate lines,

the first gate lines comprise a first major gate line supplying a gate signal to the driving thin film transistors connected with the first major pixel electrodes, and first minor gate lines supplying a gate signal to the driving thin film transistors connected with the first minor pixel electrodes, and

the second gate lines comprise second major gate line supplying a gate signal to the driving thin film transistors connected with the second major pixel electrodes, and second minor gate lines supplying a gate signal to the driving thin film transistors connected with the second minor pixel electrodes.

7. The display device according to claim 6, wherein the first major gate lines and the first minor gate lines supply the same gate signal, and

the second major gate lines and the second minor gate lines supply the same gate signal.

8. The display device according to claim 7, wherein the first display substrate further comprises:

a storage electrode line formed parallel with the gate lines;

a storage electrode pad; and

a charging thin film transistor connected with one of the second major gate lines, one of the first minor pixel electrodes and the storage electrode pad.

9. The display device according to claim 6, wherein the first major gate lines and the first minor gate lines supply different gate signals, and

the second major gate lines and the second minor gate lines supply different gate signals.

10. The display device according to claim 5, wherein the first major pixel electrodes and the second major pixel electrodes are directly connected with the driving thin film transistors and,

the first minor pixel electrodes and the second minor pixel electrodes are indirectly connected with the driving thin film transistors through coupling capacitances.

11. The display device according to claim 5, wherein the first display substrate further comprises a color filter disposed between the pixel electrodes and the data lines.

12. The display device according to claim 5, wherein at least one of the pixel electrodes and the common electrode comprise a micro-slit pattern dividing a pixel region disposed with the pixel electrodes into a plurality of domains.

13. The display device according to claim 12, wherein the micro-slit pattern comprises:

at least one vertical part overlapped with the data lines;

at least one transverse part crossing the vertical part; and

a plurality of slant parts extended from at least one of the vertical part and the transverse part.

14. The display device according to claim 13, wherein the liquid crystal layer comprises vertically oriented liquid crystal molecules and ultra violet ray cured type monomer, wherein the micro-slit pattern and the ultra violet ray cured type monomer pre-tilt the liquid crystal molecules in a direction different from each other for the each domain.

15. The display device according to claim 5, wherein at least one of the pixel electrodes and the common electrode comprise a cut pattern, and the cut pattern divides a pixel region of the pixel electrodes into a plurality of domains.

16. The display device according to claim 15, wherein the cut pattern comprises a first cut pattern overlapped parallel with the data lines and a second cut pattern crossing the data lines in a slant direction.

17. The display device according to claim 5 further comprises:

a first orientation film disposed on the pixel electrodes of the first display substrate; and

a second orientation film disposed on the common electrode of the second display substrate, and at least one of the first orientation film and the second orientation film divide each pixel electrode into a plurality of domains.

18. The display device according to claim 17, wherein some of boundaries of the plural domains are overlapped parallel with the data lines.

19. A display device comprising:

a first display substrate which comprises a plurality of pixel electrodes, a plurality of data lines which are disposed parallel with each other and cross a plurality of center portions of the plurality of pixel electrodes in a direction crossing a longitudinal direction of the data lines in a plan view of the display device, a plurality of gate lines which cross the data lines in the plan view of the display device, and a plurality of driving thin film transistors which are respectively connected with one or more of the data lines, the gate lines, and the pixel electrodes, the plurality of pixel electrodes including at least a first pixel electrode, a second pixel electrode, a third pixel electrode, and fourth pixel electrode, the plurality of data lines including at least a first data line and a second data line that is adjacent to the first data line, the first data line overlapping a center portion of the first pixel electrode and overlapping a center portion of the second pixel electrode in the plan view of the display device, the second data line overlapping a center portion of the third pixel electrode and overlapping a center portion of the fourth pixel electrode in the plan view of the display device, the first data line supplying a first data voltage to the first pixel electrode and the fourth pixel electrode without supplying the first data voltage to the second pixel electrode or the third pixel electrode;

a second display substrate which is disposed opposite to the first display substrate and comprises a common electrode; and

a liquid crystal layer which is disposed between the first display substrate and the second display substrate.

20. The display device according to claim 19, wherein

the first data voltage has a first polarity and is applied to both the first pixel electrode and the fourth pixel electrode,

the second data line supplies a second data voltage to the third pixel electrode, the second data voltage having a second polarity that is different from the first polarity, and

the third pixel electrode is adjacent to the first pixel electrode and is adjacent to the fourth electrode.