DISPLAY APPARATUS

• US 20110285689A1
• Filed: 07/29/2011
• Published: 11/24/2011
• Est. Priority Date: 11/22/2005
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: Lu, Jian-Gang, Lee, Chang-Hun, Lee, Jun-Woo, KIM, Hee-Seop, Han, Eun-Hee
• Application Number:
  US13/194,795
• Publication Number:
  US 20110285689A1
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134381 Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes

Abstract

In a display apparatus, a first display substrate includes a common electrode to which a common voltage is applied. A second display substrate facing the first display substrate includes a first pixel electrode and a second pixel electrode. The first and second pixel electrodes formed in one pixel region are spaced apart from and insulated from each other. A first data voltage having a first polarity with reference to the common voltage is applied to the first pixel electrode, and a second data voltage having a second polarity different from the first polarity with reference to the common voltage is applied to the second pixel electrode. Thus, a fringe field is formed between the first and second display substrates and a lateral field is formed in the second display substrate, thereby improving a transmittance and a response speed of the display apparatus.

Claims

1. A display apparatus comprising:

a first base substrate;

a common electrode arranged on the first base substrate to which a common voltage is applied, the common electrode having a plurality of sub common electrodes spaced apart from one another; and

a second base substrate facing the first base substrate and having a plurality of pixel regions,

wherein each of pixel regions comprises;

a first pixel electrode to receive a first data voltage having a first polarity with reference to the common voltage; and

a second pixel electrode to receive a second data voltage having a second polarity different from the first polarity with reference to the common voltage is applied, the second pixel electrode being spaced apart from the first pixel electrode by a predetermined distance.

2. The display apparatus of claim 1, wherein the common electrode is formed at a position corresponding to a space between the first and second pixel electrodes spaced apart from each other by the predetermined distance.

3. The display apparatus of claim 1, wherein the common electrode has a width greater than the distance between the first and second pixel electrodes.

4. The display apparatus of claim 2, further comprising an opening being formed through the common electrode, the opening is formed at the position corresponding to the space between the first and second pixel electrodes.

5. The display apparatus of claim 1, wherein the width of the first pixel electrode and the second pixel electrode is equal to or less than the distance between the first pixel electrode and the second pixel electrode.

6. The display apparatus of claim 1, wherein a voltage difference between the first data voltage and the second data voltage is approximately two times larger than a voltage difference between the first data voltage and the common voltage and the voltage difference between the first data voltage and the second data voltage is approximately two times larger than a voltage difference between the second data voltage and the common voltage.

7. A display apparatus comprising:

a first base substrate;

a common electrode formed on the first base substrate to receive a common voltage, the common electrode has a first opening formed through the common electrode;

a second base substrate facing the first base substrate and divided into a plurality of pixel regions;

a first pixel electrode formed in each of the pixel regions to receive a first data voltage having a first polarity with reference to the common voltage; and

a second pixel electrode formed in each of the pixel regions to receive a second data voltage having a second polarity different from the first polarity with reference to the common voltage, the second pixel electrode being spaced apart from the first pixel electrode by a predetermined distance and electrically insulated from the first pixel electrode,

wherein spaces between the first and second pixel electrode are defined as second openings, and the first opening is formed at a position corresponding to a space between two second openings adjacent to each other.

8. The display apparatus of claim 7, wherein the common electrode is formed at a position corresponding to a space between the first and second pixel electrodes spaced apart from each other by the predetermined distance.

9. The display apparatus of claim 8, wherein the common electrode has a width substantially equal to or smaller than the distance between the first and second pixel electrodes.

10. The display apparatus of claim 8, wherein the common electrode has a width greater than the distance between the first and second pixel electrodes, and an opening is formed at the position corresponding to the space between the first and second pixel electrodes, the opening being formed through the common electrode.

11. The display apparatus of claim 7, further comprising:

a first switching device formed in each of the pixel regions and electrically connected to the first pixel electrode to apply the first data voltage to the first pixel electrode; and

a second switching device formed in each of the pixel regions and electrically connected to the second pixel electrode to apply the second data voltage to the second pixel electrode.

12. The display apparatus of claim 11, further comprising:

a plurality of gate lines; and

a plurality of data lines,

wherein the gate lines comprises a first gate line and a second gate line and the data lines comprises a first data line and a second data line, and

wherein the first switching device is connected to the first gate line and the first data line, and the second switching device is connected to the first gate line and the second data line or the second switching device is connected to the second gate line and the first data line.

13. The display apparatus of claim 12, wherein the first gate line receives a first gate voltage for an earlier H/2 time of an 1H time where a pixel is operated and is electrically connected to a gate electrode of the first switching device, the second gate line receives a second gate voltage for a later H/2 time of the 1H time and is electrically connected to a gate electrode of the second switching device, and

the first data line receives the first data voltage for the earlier H/2 time and the second data voltage for the later H/2 time and is electrically connected to a source electrode of the first switching device and a source electrode of the second switching device.

14. The display apparatus of claim 13, wherein the first switching device applies the first data voltage to the first pixel electrode in response to the first gate voltage during the earlier H/2 time, and the second switching device applies the second data voltage to the second pixel electrode in response to the second gate voltage during the later H/2 time.

15. The display apparatus of claim 12, wherein each of the first and second pixel electrodes comprises a plurality of branches which are extended in a direction substantially parallel to the data line, and branches of the first pixel electrode and the branches of the second pixel electrode are alternately arranged in a plan view.

16. The display apparatus of claim 15, further comprising:

a plurality of connecting portion which connect adjacent branches of the first and second pixel electrodes, the each of the connecting portion is extended in a direction substantially parallel to the gate line.

17. The display apparatus of claim 12, wherein the first gate line is electrically connected to a gate electrode of the first switching device and a gate electrode of the second switching device receives a gate voltage, the first data line is electrically connected to a source electrode of the first switching device to receive the first data voltage during an 1H time where a pixel is operated, and the second data line is electrically connected to a source electrode of the second switching device to receive the second data voltage during the 1H time.

18. The display apparatus of claim 17, wherein the first switching device applies the first data voltage to the first pixel electrode in response to the gate voltage during the 1H time, and the second switching device applies the second data voltage to the second pixel electrode in response to the gate voltage during the 1H/2 time.

19. The display apparatus of claim 18, wherein each of the first and second pixel electrodes comprises a plurality of branches which are extended in a direction substantially parallel to the first and second data lines, and branches of the first pixel electrode and the branches of the second pixel electrode are alternately arranged in a plan view.

20. The display apparatus of claim 7, further comprising a storage line insulated from and facing the first and second pixel electrodes to receive the common voltage.

21. The display apparatus of claim 7, further comprising a liquid crystal layer having a plurality of liquid crystal molecule and disposed between the first and second base substrates.

22. The display apparatus of claim 21, wherein the liquid crystal molecules are a negative type and the second base substrate is rubbed in a direction substantially perpendicular to an extended direction of the first and second pixel electrodes.

23. The display apparatus of claim 22, wherein the liquid crystal molecules are a positive type and the second base substrate is rubbed in a direction substantially parallel to an extended direction of the first and second pixel electrodes.

24. A display apparatus comprising:

a first base substrate;

a second base substrate facing the first base substrate;

a common electrode formed on the second base substrate to receive a common voltage;

a first pixel electrode formed on the second base substrate and electrically insulated from the common electrode to receive a first data voltage having a higher voltage level than that of the common voltage;

a second pixel electrode formed on the second base substrate and electrically connected to the common electrode and the first pixel electrode to receive a second data voltage having a lower voltage level than that of the common voltage; and

a liquid crystal layer having a first liquid crystal molecules rotated by a first fringe field formed between the first pixel electrode and the common electrode and a second liquid crystal molecules rotated by a second fringe field formed between the second pixel electrode and the common electrode.

25. The display apparatus of claim 24, further comprising an insulating interlayer is formed between the common electrode and the first pixel electrode and between the common electrode and the second pixel electrode.

26. The display apparatus of claim 24, further comprising:

a first switching device electrically connected to the first pixel electrode to apply the first data voltage to the first pixel electrode; and

a second switching device electrically connected to the second pixel electrode to apply the second data voltage to the second pixel electrode.

27. The display apparatus of claim 26, further comprising:

a plurality of gate lines; and

a plurality of data lines;

wherein the gate lines comprises a first gate line and a second gate line and the data lines comprises a first data line and a second data line, and the first switching device is connected to the first gate line and the first data line, and the second switching device is connected to the first gate line and the second data line or the second switching device is connected to the second gate line and the first data line.

28. The display apparatus of claim 27, wherein the first gate line to receive a first gate voltage for an earlier H/2 time of an 1H time where a pixel is operated, the first gate line being electrically connected to a gate electrode of the first switching device, the second gate line to receive a second gate voltage for a later H/2 time of the 1H time, the second gate line being electrically connected to a gate electrode of the second switching device, and the first data line to receive the first data voltage for the earlier H/2 time and the second data voltage for the later H/2 time, the first data line being electrically connected to a source electrode of the first switching device and a source electrode of the second switching device.

29. The display apparatus of claim 28, wherein each of the first and second pixel electrodes comprises a plurality of branches which are extended in a direction substantially parallel to the data line, and branches of the first pixel electrode and the branches of the second pixel electrode are alternately arranged in a plan view.

30. The display apparatus of claim 27, wherein the first gate line electrically connected to a gate electrode of the first switching device and a gate electrode of the second switching device to receive a gate voltage, the first data line electrically connected to a source electrode of the first switching device to receive the first data voltage during an 1H time where a pixel is operated, and the second data line electrically connected to a source electrode of the second switching device to receive the second data voltage during the 1H time.

31. The display apparatus of claim 30, wherein each of the first and second pixel electrodes comprises a plurality of branches which are extended in a direction substantially parallel to the data line, and branches of the first pixel electrode and the branches of the second pixel electrode are alternately arranged in a plan view.

32. The display apparatus of claim 24, further comprising a storage line insulated from and facing the first and second pixel electrodes to receive the common voltage.