Area sensor and display device including area sensor
First Claim
1. A liquid crystal display device having an area sensor function for detecting an external input position by detecting an image on a panel surface, the liquid crystal display device comprising:
- a liquid crystal panel including;
an active matrix substrate;
a counter substrate; and
a liquid crystal layer provided between the active matrix substrate and the counter substrate;
a backlight illuminating the liquid crystal panel;
a position detecting section (i) including a plurality of optical sensor elements each detecting an intensity of received light and (ii) detecting the external input position according to detection of the image on the panel surface by use of the plurality of optical sensor elements; and
a reflectance changing section reducing a reflectance of light from the backlight in response to application of pressure on the panel surface,the reflectance changing section including at least two elastic films, the reflectance changing section being configured so that in a state where no pressure is applied on the panel surface, an air layer is formed between the two elastic films whereas in a case where pressure is applied on the panel surface, the two elastic films contact each other.
1 Assignment
0 Petitions
Accused Products
Abstract
A liquid crystal display device (100) of the present invention includes: a liquid crystal panel (20) including: an active matrix substrate (21); a counter substrate (22); and a liquid crystal layer (23) provided between the active matrix substrate (21) and the counter substrate (22); and a backlight (10) illuminating the liquid crystal panel. The liquid crystal display device (100) has an area sensor function for detecting an external input position, and further includes a reflectance changing section (50) that reduces a reflectance of light from the backlight (10) in response to application of pressure on a panel surface (100a). The reflectance changing section (50) is configured so that in a state where no pressure is applied on the panel surface (100a), an air layer (50c) is formed between two elastic films (50a and 50b) whereas in a state where pressure is applied on the panel surface (100a), the two elastic films (50a and 50b) contact each other.
14 Citations
11 Claims
-
1. A liquid crystal display device having an area sensor function for detecting an external input position by detecting an image on a panel surface, the liquid crystal display device comprising:
-
a liquid crystal panel including; an active matrix substrate; a counter substrate; and a liquid crystal layer provided between the active matrix substrate and the counter substrate; a backlight illuminating the liquid crystal panel; a position detecting section (i) including a plurality of optical sensor elements each detecting an intensity of received light and (ii) detecting the external input position according to detection of the image on the panel surface by use of the plurality of optical sensor elements; and a reflectance changing section reducing a reflectance of light from the backlight in response to application of pressure on the panel surface, the reflectance changing section including at least two elastic films, the reflectance changing section being configured so that in a state where no pressure is applied on the panel surface, an air layer is formed between the two elastic films whereas in a case where pressure is applied on the panel surface, the two elastic films contact each other. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An area sensor detecting an external input position by detecting an image on a detection target surface,
the area sensor comprising: -
a position detecting section (i) including a plurality of optical sensor elements each detecting an intensity of received light and (ii) detecting the external input position according to detection of the image on the detection target surface by use of the plurality of optical sensor elements; a light emitting section illuminating the position detecting section from a backside of the position detecting section; and a reflectance changing section reducing a reflectance of the light from the light emitting section in response to application of pressure on the detection target surface, the reflectance changing section including at least two elastic films, and the reflectance changing section being configured so that in a state where no pressure is applied on the detection target surface, an air layer is formed between the two elastic films whereas in a case where pressure is applied on the detection target surface, the two elastic films contact each other. - View Dependent Claims (9, 10, 11)
-
Specification