Reflection liquid crystal display apparatus
First Claim
1. A liquid crystal display device comprising:
- a liquid crystal display panel having a display surface and producing a display by reflecting light incident through said display surface;
lighting means for irradiating light from a front side of said display surface;
light-detecting means for detecting illumination of said display surface, said light-detecting means being located proximate said display surface; and
lighting control means for controlling luminous intensity of said lighting means in accordance with the illumination of said display surface detected by said light-detecting means.
2 Assignments
0 Petitions
Accused Products
Abstract
A reflective liquid crystal display device is integrated with a liquid crystal display panel (1), detects display surface illuminance by a plurality of light sensors (10) provided in the vicinity of the display surface, and in accordance with the detection result, controls luminous intensity of a front light (lighting means) (19) using a lighting control circuit (22) so that the display surface illuminance becomes a predetermined magnitude. Even if the use environment of the reflective liquid crystal display device changes, or more specifically, intensity of external light shone from outside of the device into the display surface varies, the configuration allows controlling automatically the amount of emission from the front light to automatically maintain an appropriate display luminance and to reduce electric power consumption.
-
Citations
9 Claims
-
1. A liquid crystal display device comprising:
-
a liquid crystal display panel having a display surface and producing a display by reflecting light incident through said display surface;
lighting means for irradiating light from a front side of said display surface;
light-detecting means for detecting illumination of said display surface, said light-detecting means being located proximate said display surface; and
lighting control means for controlling luminous intensity of said lighting means in accordance with the illumination of said display surface detected by said light-detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification