Liquid crystal display

• US 7,518,686 B2
• Filed: 08/11/2004
• Issued: 04/14/2009
• Est. Priority Date: 10/28/2003
• Status: Expired due to Fees

• Current Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jung, Tae-Hyeog, Heo, Hae-Jin, Park, Dong-Jin
• Primary Examiner(s): Duong; Thoi V
• Application Number:
  US10/916,666
• Publication Number:
  US 20050088582A1
• Time in Patent Office: 1,707 Days
• Field of Search: 349/139, 349/143, 349/43, 349/65, 349/141, 349/123, 349/110, 349/42, 349/106, 349/38
• US Class Current: 349/139
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134318 having a patterned common electrode

Abstract

A liquid crystal display having suppression of horizontal crosstalk. A liquid crystal display includes a lower substrate and a plurality of data lines arranged on the lower substrate. The liquid crystal display also includes an upper substrate positioned above the lower substrate and has an opposite surface facing the lower substrate. Stripe shaped common electrodes spaced apart from each other by a plurality of regions are formed on the opposite surface of the upper substrate. Each of the plurality of regions corresponds to one of the data lines of the lower substrate.

Claims

1. A liquid crystal display comprising:

a lower substrate;

a plurality of data lines and a plurality of pixel electrodes on the lower substrate;

an upper substrate positioned above the lower substrate and having a surface facing the lower substrate;

stripe shaped common electrodes spaced apart from each other by a plurality of regions on the surface of the upper substrate, wherein the stripe shaped common electrodes substantially overlap with the pixel electrodes, and wherein each said region corresponds to one of the data lines of the lower substrate;

a shielding film between the surface of the upper substrate and the stripe shaped common electrodes, wherein portions of the shielding film overlap with the plurality of data lines at the plurality of regions and other portions of the shielding film overlap with portions of the stripe shaped common electrodes;

liquid crystals disposed between the upper and lower substrates, wherein the pixel electrodes, the stripe shaped common electrodes, and the liquid crystals form a plurality of liquid crystal capacitors;

a lower alignment film disposed on the pixel electrodes; and

an upper alignment film disposed on the stripe shaped common electrodes and the plurality of regions.

2. The liquid crystal display according to claim 1, wherein substantially the same voltage is applied to the common electrodes.

3. The liquid crystal display according to claim 1, wherein the common electrodes are formed of a transparent conductive film.

4. The liquid crystal display according to claim 3, wherein the transparent conductive film is an ITO (indium tin oxide) film or an IZO (indium zinc oxide) film.

5. The liquid crystal display according to claim 1, wherein the common electrodes are substantially simultaneously formed using photolithography.

6. The liquid crystal display according to claim 1, further comprising a common electrode connection part positioned at at least one end of the common electrodes so that the common electrodes are connected to each other.

7. The liquid crystal display according to claim 6, wherein the common electrodes and the common electrode connection part are formed of a transparent conductive film.

8. The liquid crystal display according to claim 7, wherein the transparent conductive film is an ITO film or an IZO film.

9. The liquid crystal display according to claim 6, wherein the common electrodes and the common electrode connection part are substantially simultaneously formed using photolithography.

10. The liquid crystal display according to claim 1, further comprising red (R), green (G) and blue (B) backlights positioned below the lower substrate.

11. A liquid crystal display comprising:

a lower substrate;

a plurality of data lines and a plurality of pixel electrodes on the lower substrate;

an upper substrate positioned above the lower substrate and having a surface facing the lower substrate;

stripe shaped common electrodes spaced apart from each other by a plurality of regions on the surface of the upper substrate, wherein the stripe shaped common electrodes substantially overlap with the pixel electrodes, and wherein each said region corresponds to one of the data lines of the lower substrate;

a common electrode connection part positioned at at least one end of the common electrodes so that the common electrodes are connected to each other;

a shielding film between the surface of the upper substrate and the stripe shaped common electrodes, wherein portions of the shielding film overlap with the plurality of data lines at the plurality of regions and other portions of the shielding film overlap with portions of the stripe shaped common electrodes;

liquid crystals disposed between the upper and lower substrates, wherein the pixel electrodes, the striped shaped common electrodes, and the liquid crystals form a plurality of liquid crystal capacitors;

a lower alignment film disposed on the pixel electrodes; and

an upper alignment film disposed on the stripe shaped common electrodes and the plurality of regions.

12. The liquid crystal display according to claim 11, wherein substantially the same voltage is applied to the common electrodes.

13. The liquid crystal display according to claim 11, wherein the common electrodes are formed of a transparent conductive film.

14. The liquid crystal display according to claim 13, wherein the transparent conductive film is an ITO (indium tin oxide) film or an IZO (indium zinc oxide) film.

15. The liquid crystal display according to claim 11, wherein the common electrodes and the common electrode connection part are formed of a transparent conductive film.

16. The liquid crystal display according to claim 11, wherein the common electrodes and the common electrode connection part are substantially simultaneously formed using photolithography.

17. The liquid crystal display according to claim 11, further comprising red (R), green (G) and blue (B) backlights positioned below the lower substrate.

18. A liquid crystal display comprising:

a first substrate having a plurality of data lines and a plurality of pixel electrodes thereon;

a second substrate having a surface facing the first substrate, wherein a gap exists between the first substrate and the second substrate;

a plurality of stripe shaped common electrodes spaced apart from each other by a plurality of regions on the surface of the second substrate facing the first substrate, wherein the stripe shaped common electrodes substantially overlap with the pixel electrodes, and wherein each said region corresponds to one of the data lines of the lower substrate;

a shielding film between the surface of the second substrate and the stripe shaped common electrodes, wherein portions of the shielding film overlap with the plurality of data lines at the plurality of regions and other portions of the shielding film overlap with portions of the stripe shaped common electrodes;

liquid crystals disposed within the gap between the first substrate and the second substrate, wherein the pixel electrodes, the stripe shaped common electrodes, and the liquid crystals form a plurality of liquid crystal capacitors;

a first alignment film disposed on the pixel electrodes; and

a second alignment film disposed on the stripe shaped common electrodes and the plurality of regions.

19. The liquid crystal display of claim 18, wherein each said region is at least as wide as the corresponding one of the data lines.

20. The liquid crystal display of claim 18, further comprising a common electrode connection part positioned at at least one end of the common electrodes so that the common electrodes are connected to each other.