Liquid crystal display device

Abstract

A liquid crystal display device includes a liquid crystal panel having an upper substrate and a lower substrate that face each other with a layer of liquid crystal molecules therebetween, and a liquid powder display panel at a lower surface of the liquid crystal panel for blocking light.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of embodiments of the invention. In the drawings:

FIG. 1 is a schematic diagram of the related art liquid crystal display device;

FIG. 2 is a diagram representing a cross-section of one sub-pixel in the related art IPS mode liquid crystal panel;

FIG. 3 is a diagram representing a state of light leakage in a related art IPS mode liquid crystal panel;

FIGS. 4 and 5 are cross-sectional diagrams representing light transmission states in a display panel of a liquid crystal display device according to an embodiment of the invention; and

FIG. 6 is a plan view of the liquid powder display panel of the liquid crystal display device according to an embodiment of the invention.

Claims

1. A liquid crystal display device, comprising: a liquid crystal panel having an upper substrate and a lower substrate that face each other with a layer of liquid crystal molecules therebetween; anda liquid powder display panel at a lower surface of the liquid crystal panel for blocking light.

2. The liquid crystal display device according to claim 1, further comprising: a first plurality of sub-pixels in the liquid crystal panel; anda second plurality of sub-pixels in the liquid powder display panel, wherein the first plurality of sub-pixels correspond to the second plurality of sub-pixels.

3. The liquid crystal display device according to claim 2, further comprising: a separation film between the second plurality of sub-pixels.

4. The liquid crystal display device according to claim 1, wherein the liquid powder display panel includes: an upper plate formed of a transparent material;an upper electrode on the upper plate;a lower plate formed of a transparent material;a lower electrode on the lower plate; andblack particles positioned between the upper and lower plates.

5. The liquid crystal display device according to claim 4, wherein the upper electrode is transparent.

6. The liquid crystal display device according to claim 4, further comprising: a separation film between the upper and lower plates for maintaining a gap between the upper and lower plates.

7. The liquid crystal display device according to claim 6, wherein the separation film has a lattice shape.

8. The liquid crystal display device according to claim 4, wherein the black particles have a faster response speed to an electric field than the liquid crystal molecules.

9. The liquid crystal display device according to claim 4, wherein the black particles have a positive polarity.

10. The liquid crystal display device according to claim 1, further comprising: a black matrix on the upper substrate of the liquid crystal panel;a cell area in the liquid crystal panel defined by the black matrix, wherein the cell area corresponds to an opening in the lower electrode.

11. A liquid crystal display device, comprising: a liquid crystal panel having cell areas defined by a black matrix; anda liquid powder display panel at a lower surface of the liquid crystal panel for blocking light, wherein the liquid powder display panel includes first electrodes with openings corresponding to the cell areas.

12. The liquid crystal display device according to claim 11, further comprising a separation film between the first electrodes.

13. The liquid crystal display device according to claim 12, wherein the separation film has a lattice shape.

14. The liquid crystal display device according to claim 11, wherein the liquid powder display panel includes: an upper plate formed of a transparent material;a second electrode on the upper plate;a lower plate formed of a transparent material;the first electrode is on the lower plate; andblack particles positioned between the upper and lower plates.

15. The liquid crystal display device according to claim 14, wherein the second electrode is transparent.

16. The liquid crystal display device according to claim 14, wherein the black particles have a faster response speed to an electric field than the liquid crystal molecules.

17. The liquid crystal display device according to claim 14, wherein the black particles have a positive polarity.

18. The liquid crystal display device, comprising: a liquid crystal panel having an upper substrate and a lower substrate that face each other with a layer of liquid crystal molecules therebetween;a black matrix defining a cell area in the liquid crystal panel;an upper plate formed of a transparent material adhered to the lower substrate;a first electrode on the upper plate;a lower plate formed of a transparent material;a second electrode on the lower plate having an opening corresponding to the cell area;a separation film between the upper and lower plates for maintaining a gap between the upper and lower plates; andblack particles positioned between the upper and lower plates.

19. The liquid crystal display device according to claim 18, wherein the black particles have a faster response speed to an electric field than the liquid crystal molecules.

20. The liquid crystal display device according to claim 18, wherein the black particles have a positive polarity.