COORDINATE SENSOR, ELECTRONIC DEVICE, DISPLAY DEVICE AND LIGHT-RECEIVING UNIT Russian patent published in 2013 - IPC G06F3/41 G09F9/00 

FIELD: physics.

SUBSTANCE: coordinate sensor (10) includes line sensors (1) that are arranged in X-axis and Y-axis directions, and right-angle prisms (2) each of which changes the light path of light that has passed through an image display region of a liquid crystal panel (20). Each of the line sensors (1) is placed outside the image display region and has a light-receiving surface (1a) parallel to the image display surface of the liquid crystal panel (20). The right angle prisms (2) direct light which travels in the X-axis and Y-axis directions and which has passed through the image display region onto to the light-receiving surfaces (1a) of the line sensors (1). The sensor (10) receives light which has passed through the image display region of the liquid crystal panel (20) so as to detect coordinates, on the image display region, that are indicated by an object, for example a finger, whose coordinates are to be detected. A thin coordinate sensor that enables easy alignment of input and determination of coordinates with no reduction in image format and restriction on operation speed is realised.

EFFECT: high accuracy of sensor.

60 cl, 44 dwg