Curved liquid crystal display panel and curved display device having the same

• US 10,324,318 B2
• Filed: 11/27/2012
• Issued: 06/18/2019
• Est. Priority Date: 08/22/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Cheong-Hun, Son, Jeong-Man, Kim, Dong-Wook, Ahn, Byong-Wook
• Primary Examiner(s): Glick, Edward J
• Assistant Examiner(s): Chung, David Y
• Application Number:
  US13/686,722
• Publication Number:
  US 20140055696A1
• Time in Patent Office: 2,394 Days
• CPC Class Codes: G02F 1/132 Thermal activation of liquid crystals exhibiting a thermo-optic effect
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: G02F 2201/56 Substrates having a particular shape, e.g. non-rectangular

Abstract

A curved liquid crystal display panel includes an upper substrate having a curved shape, a liquid crystal layer, a lower substrate having a curved shape, where the lower substrate is combined with the upper substrate and the liquid crystal layer is disposed between the upper substrate and the lower substrate, and a heating line disposed on at least one of the upper substrate and the lower substrate and which provides heat to the liquid crystal layer such that a temperature of the liquid crystal layer increases.

Claims

1. A curved liquid crystal display apparatus comprising:

an upper substrate having a curved shape;

a lower substrate having a curved shape;

a liquid crystal layer disposed between the upper substrate and the lower substrate, the liquid crystal layer having a curved shape;

a heating line disposed with at least one of the upper substrate and the lower substrate; and

a heat source providing part which provides a power to the heating line,

wherein the heating line is disposed on at least one of the upper substrate and the lower substrate corresponding to an area having an increased cell gap between the upper substrate and the lower substrate, and the area corresponding to having the liquid crystal layer in a display region which displays an image,

wherein the area having the increased cell gap results from buckling of the upper substrate independent and irrespective of any spacer or light shielding portion being present in the area, and

wherein the power provided to the heating line corresponding to the area having the increased cell gap is substantially greater than a power provided to the heating line corresponding to other areas where buckling does not occur.

2. The curved liquid crystal display apparatus of claim 1, wherein the heating line is disposed substantially uniformly on the lower substrate.

3. The curved liquid crystal display apparatus of claim 1, wherein the heating line is disposed on a portion of the lower substrate.

4. The curved liquid crystal display apparatus of claim 3, wherein the heating line is disposed in an area where buckling occurs when the upper substrate and the lower substrate are combined with each other and curved.

5. The curved liquid crystal display apparatus of claim 1, wherein the lower substrate comprises:

a pixel electrode; and

a data line which provides the pixel electrode with a data signal, and

wherein a resistance of the heating line is greater than a resistance of the data line.

6. The curved liquid crystal display apparatus of claim 1, wherein the lower substrate comprises:

a pixel electrode; and

a data line which provides the pixel electrode with a data signal, and

wherein the heating line is substantially parallel to the data line.

7. The curved liquid crystal display apparatus of claim 1, wherein the lower substrate comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line is not overlapping the pixel electrode when viewed from a top view.

8. The curved liquid crystal display apparatus of claim 1, wherein the lower substrate comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element,

wherein the heating line is overlapping a portion of the pixel electrode when viewed from a top view.

9. The curved liquid crystal display apparatus of claim 1, wherein the lower substrate comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line is substantially parallel to the gate line.

10. The curved liquid crystal display apparatus of claim 1,

wherein the lower substrate comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line comprises;

a vertical heating line substantially parallel to the data line; and

a horizontal heating line substantially parallel to the gate line.

11. The curved liquid crystal display apparatus of claim 1,

wherein the lower substrate comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element,

wherein the heating line comprises;

a vertical heating line substantially parallel to the data line; and

a horizontal heating line substantially parallel with the gate line, and

wherein the vertical and horizontal heating lines overlap a portion of the pixel electrode.

12. The curved liquid crystal display apparatus of claim 1,

wherein the upper substrate comprises a black matrix layer, and

wherein the heating line is disposed on the upper substrate and overlapping the black matrix layer.

13. The curved liquid crystal display apparatus of claim 1, wherein the heating line increases the temperature of the liquid crystal layer such that a refractive index difference of the liquid crystal layer is decreased.

14. The curved liquid crystal display apparatus of claim 1, wherein the heating line provides heat to the liquid crystal layer such that a temperature of the liquid crystal layer increases.

15. A curved liquid crystal display device comprising:

a curved liquid crystal display panel comprising;

an upper substrate having a curved shape;

a liquid crystal layer having a curved shape;

a lower substrate which is combined with the upper substrate, the lower substrate having a curved shape, wherein the liquid crystal layer is disposed between the upper substrate and the lower substrate; and

a heating line disposed with at least one of the upper substrate and the lower substrate; and

a heat source providing part which provides a power to the heating line,

wherein the heating line is disposed on at least one of the upper substrate and the lower substrate corresponding to a first area having an increased cell gap between the upper substrate and the lower substrate, and the first area corresponding to having the liquid crystal layer in a display region which displays an image, and

wherein the power provided to the heating line corresponding to the first area is substantially greater than a power provided to the heating line corresponding to a second area where buckling does not occur.

16. The curved liquid crystal display device of claim 15, wherein

the heating line is disposed substantially uniformly on the lower substrate, and

the heat source providing part provides the heating line with powers different from each other.

17. The curved liquid crystal display device of claim 15, wherein

the curved liquid crystal display panel includes the first area where buckling occurs due to a bending of the curved liquid crystal display panel and the second area, and

the heating line is disposed on the first area of the curved liquid crystal display panel.

18. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein a resistance of the heating line is substantially greater than a resistance of the data line.

19. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode; and

a data line which provides a data signal to the pixel electrode, and

wherein the heating line and the data line are substantially parallel to each other.

20. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line is disposed on an area not overlapping the pixel electrode when viewed from a top view.

21. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line is disposed overlapping a portion of the pixel electrode when viewed from a top view.

22. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line and the gate line are substantially parallel to each other.

23. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element, and

wherein the heating line comprises;

a vertical heating line substantially parallel to the data line; and

a horizontal heating line substantially parallel to the gate line.

24. The curved liquid crystal display device of claim 15,

wherein the curved liquid crystal display panel further comprises:

a pixel electrode;

a switching element electrically connected to the pixel electrode;

a data line connected to an input terminal of the switching element; and

a gate line connected to a control terminal of the switching element,

wherein the heating line comprises;

a vertical heating line substantially parallel to the data line; and

a horizontal heating line substantially parallel to the gate line, and

wherein the vertical and horizontal heating lines overlap a portion of the pixel electrode.

25. The curved liquid crystal display device of claim 15, wherein

the upper substrate comprises a black matrix layer, and

the heating line is disposed on the upper substrate overlapping the black matrix layer.

26. The curved liquid crystal display device of claim 15, wherein the heating line provides heat to the liquid crystal layer such that a temperature of the liquid crystal layer increases.