VIEW ANGLE CONTROLLABLE DISPLAY DEVICE AND TERMINAL HAVING THE SAME

Abstract

A display device, capable of changing view angle range and suitable for reducing thickness and weight, is provided. One compensating panel has such a structure that two polymer films, having birefringence, adhere to each other. The birefringence directions of the polymer films are parallel or orthogonal to the liquid crystal orientation direction. Similarly, another compensating panel has such a structure that two polymer films, having birefringence, adhere to each other. The birefringence directions of the polymer films are parallel or orthogonal to the liquid crystal orientation direction. Since the compensating panel does not include glass substrates but includes polymer films, the display device can be thin and light.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view showing a first embodiment (first example) of a display device according to the present invention;

FIG. 2 is an exploded perspective view showing the first embodiment (second example) of the display device according to the present invention;

FIG. 3 is an exploded perspective view showing the first embodiment (third example) of the display device according to the present invention;

FIG. 4 is an exploded perspective view showing a second embodiment (first example) of a display device according to the present invention;

FIG. 5 is an exploded perspective view showing the second embodiment (second example) of the display device according to the present invention;

FIG. 6 is an exploded perspective view showing the second embodiment (third example) of the display device according to the present invention;

FIG. 7 is an exploded perspective view showing the second embodiment (fourth example) of the display device according to the present invention;

FIG. 8 is an exploded perspective view showing a third embodiment of a display device according to the present invention;

FIG. 9 is an exploded perspective view showing a fourth embodiment of a display device according to the present invention;

FIG. 10 is an exploded perspective view showing a fifth embodiment of a display device according to the present invention;

FIG. 11 is a schematic cross-sectional view showing a sixth embodiment of a display device according to the present invention;

FIG. 12 is a time chart showing the operation of the sixth embodiment;

FIG. 13 is a perspective view showing an embodiment of a terminal according to the present invention;

FIG. 14 is a cross-sectional view showing a compensating panel in a conventional display device; and

FIG. 15 is an exploded perspective view showing a conventional display device.

Claims

1. A view angle controllable display device, comprising: two polarizers;a liquid crystal display panel interposed between the two polarizers; andat least two compensating panels interposed between the two polarizers and the liquid crystal display panel, whereinat least one of the two compensating panels includes: a pair of polymer films; liquid crystal interposed between the pair of polymer films and oriented; and an electrode which applies a voltage to the liquid crystal; anda birefringence direction of the polymer film and an orientation direction of the liquid crystal are almost parallel or almost orthogonal to each other.

2. The view angle controllable display device, according to claim 1, further comprising another polarizing plate inserted in between the display panel and the two compensating panels.

3. The view angle controllable display device, according to claim 1, wherein at least one of the two compensating panels has a plurality of compensating segments, to each of which a voltage can be applied independently.

4. The view angle controllable display device, according to claim 1, wherein the two compensating panels operate differently in time sequence.

5. The view angle controllable display device, according to claim 3, wherein the plurality of compensating segments operate differently in time sequence.

6. The view angle controllable display device, according to claim 1, wherein the liquid crystal of at least one of the two compensating panels is in parallel orientation when the voltage is not applied.

7. The view angle controllable display device, according to claim 1, wherein the liquid crystal of at least one of the two compensating panels is in vertical orientation when the voltage is not applied.

8. A terminal having the view angle controllable display device according to claim 1.