Patent ID: 8643594

Claim:
A display device comprising: a display part on which a plurality of pixels are arranged in a matrix array; and a plurality of photo detection circuits which are arranged in a matrix array in the inside of the display part, wherein the display part includes: a plurality of X output lines and a plurality of Y output lines which intersect the plurality of X output lines, and each photo detection circuit of the plurality of photo detection circuits includes: a photo sensor which converts an incident light into an optical current corresponding to intensity of the incident light; an integral capacitance which is connected in series to one end of the photo sensor and integrates the optical current which is converted by the photo sensor, and a comparator to which a voltage of the integral capacitance is inputted, said comparator comprising first and second transistors, each having a control electrode thereof connected to a node between the photo sensor and the integral capacitor, wherein each of the first and second transistors has a grounded source, wherein the first transistor has a drain coupled to one of the plurality of X output lines, and wherein the second transistor has a drain coupled to one of the plurality of Y output lines.