Patent ID: 8736584
Filing Date: 2014-05-27
Classification: G02F,G06F

Abstract:
1. A coordinate sensor, comprising: at least one light emitting element; and at least two line sensors each including a plurality of light receiving elements, said at least two line sensors being positioned along an x-axis direction and a y-axis direction, respectively, light emitted from said at least one light emitting element passing through an image display region of an image display body and being received by at least one of the plurality of light receiving elements, so that indicated coordinates of a detection target are detected based on a change in an amount of light received by said at least one of the plurality of light receiving elements, the coordinate sensor further comprising, between said at least one light emitting element and the plurality of light receiving elements, at least one wavelength selecting section for allowing the light emitted from said at least one light emitting element to be selectively incident to said at least one of the plurality of light receiving elements, said at least one wavelength selecting section having at least one function of selectively reflecting, selectively transmitting, and selectively reflecting and transmitting the light emitted from said at least one light emitting element, wherein said at least one wavelength selecting section is a wavelength selective reflection mirror, the wavelength selective reflection mirror is provided on each of a plurality of light path changing sections for changing a light path of light having passed through the image display region, each of said at least two line sensors is provided outside the image display region, and has a light receiving surface parallel to an image display surface of the image display body, each of the plurality of light path changing sections guides the light having passed through the image display region to a corresponding one of said at least two line sensors, and the wavelength selective reflection mirror is covered with a canopy extended in a direction parallel to the image display surface.