Driving method of liquid crystal display device
The present invention provides a liquid crystal display device that can electrically control the viewing angle. A liquid crystal display device according to an aspect of the present invention includes a first electrode group on the lower substrate and a first region of liquid crystals in image drive areas controllable according to an applied voltage, and a second electrode group on the lower substrate and a second region of liquid crystals in viewing angle control areas controllable according to an applied voltage, wherein the first region and the second region may be controlled separately.
1. A method of driving a liquid crystal display device, comprising:
displaying an image by applying an image voltage to a first electrode group in image drive areas; and
adjusting a viewing angle by applying a viewing angle control voltage to a second electrode group in viewing angle control areas,
wherein the liquid crystal display device comprises:
a plurality of pixels, each pixel having a plurality of sub-pixels for displaying an image, each of the viewing angle control areas being one of the sub-pixels in each pixel that controls the viewing angle of the liquid crystal display device, wherein the viewing angle control areas are located between the image drive areas,
a first black matrix surrounding each of the sub-pixels; and
a second black matrix in a central area of each of the viewing angle control areas for preventing light leakage in the viewing angle control areas, wherein the second black matrix does not extend from or contact the first black matrix.
2. The method of claim 1 , wherein the viewing angle control voltage has two states.
3. The method according to claim 1 , wherein the first electrode group and the second electrode group each include a common electrode and a pixel electrode.
4. The method according to claim 3 , the viewing angle adjusting comprising:
applying the viewing angle control voltage of a predetermined level to the second electrode group to twist the liquid crystals of a second liquid crystal layer in the viewing angle control areas.
5. The method according to claim 3 , the viewing angle adjusting comprising maintaining the liquid crystals in the viewing angle control areas in an initial alignment state.
6. The method according to claim 1 , wherein the voltage applied to the image drive areas corresponds to one of a plurality of gray levels and the voltage applied to the viewing angle control areas corresponds to one of on and off states.