Liquid crystal display device
View Patent ↗In a liquid crystal display device including a liquid crystal display panel and a backlight, the present invention provides a detection-use pixel having the same constitution as respective pixels constituting a liquid crystal display part in the liquid crystal display panel and being formed on a region other than the liquid crystal display part, a light detector detecting light from the backlight through the detection-use pixel, and a controller adjusting the intensity of the light from the backlight in response to a signal from the light detector to adjust the change of the characteristics and chromaticity in the liquid crystal display panel properly.
1. A liquid crystal display device including a liquid crystal display panel which a pair of substrate, a back light and a controller, wherein
the liquid crystal display panel includes;
a test pixel for detection which has the same constitution as respective pixels constituting a liquid crystal display part of the liquid crystal display panel is formed on a region other than the liquid crystal display part,
a black matrix which are formed on one of the substrate,
a light through hole which are formed on the black matrix, light from the backlight through the test pixel and the light through hole,
a light detector which detects light from the light through hole, and
the controller which adjusts the intensity of the light from the backlight in response to a signal from the light detector.
2. A liquid crystal display device according to claim 1 , wherein
a frame having a display window which exposes a liquid crystal display part of the liquid crystal display panel is arranged on an observation-side surface of the liquid crystal display panel, and the test pixel is covered with the frame.
3. A liquid crystal display device according to claim 1 , wherein
the light detector is arranged on the observation-side surface of the liquid crystal display panel,
the light through hole are arranged between the light detector and the test pixel.
4. A liquid crystal display device according to claim 1 , wherein
the light detector is arranged on a surface of the liquid crystal display panel opposite to the observation-side surface,
a mirror is arranged on the observation-side surface of the liquid crystal display panel, the test pixel are formed between the mirror and the light detector.
5. A liquid crystal display device according to claim 1 , wherein
the test pixels are dummy pixels which are formed on peripheries of the respective pixels which constitute the liquid crystal display part.
6. A liquid crystal display device according to claim 1 , wherein
a polarizing element are formed between the test pixels and the light detector.