Liquid crystal display device and driving method thereof
AssigneeNEC LCD Technologies, Ltd.
InventorHiroshi Takeda
Life of this patent
Estimating the term…
Abstract
It is a liquid crystal display device which can display simultaneously information which is different in the front and rear sides. It has a single liquid crystal panel, a lighting unit which is arranged at both-sides and comprised with the light source, and a control circuit which carries out drive controlling of these. This control circuit controls lighting on and off the light source of the lighting unit and controls a screen display of the liquid crystal panel, and realize the display which is different to both sides of the liquid crystal panel. Thereby, when the screen of the liquid crystal panel is simultaneously seen from both sides, an independent different image can be recognized visually.
Claims19
A liquid crystal display device comprising:
- a liquid crystal panel performing picture display according to input visual data;
- a first lighting unit having a first light guide plate and a first light source supplying a light with the first light guide plate, and located in front side of the liquid crystal panel;
- a second lighting unit having a second light guide plate and a second light source supplying a light with the second light guide plate, and located in the rear side of the liquid crystal panel;
- and
- a control unit for turning on the second light source of the second lighting unit and radiating the liquid crystal panel, and supplying a first picture data to the liquid crystal panel, during a first display period, and turning on the first light source of the first lighting unit and radiating the liquid crystal panel, and supplying a second picture data to the liquid crystal panel, during a second display period different from the first display period.
Driving method of a liquid crystal display device,
- the liquid crystal display device comprising a liquid crystal panel performing a picture display according to input visual data;
- a first lighting unit having a first light guide plate and a first light source supplying a light with the first light guide plate, and located in front side of the liquid crystal panel;
- and a second lighting unit having a second light guide plate and a second light source supplying a light with the second light guide plate, and located in the rear side of the liquid crystal panel;
- the driving method comprising the steps of:
- turning on the second light source of the second lighting unit and radiating the liquid crystal panel, and supplying a first picture data to the liquid crystal panel, during a first display period, and
- turning on the first light source of the first lighting unit and radiating the liquid crystal panel, and supplying a second picture data to the liquid crystal panel, during a second display period different from the first display period.
Dependencies are inferred from the claim text.