Input/output device

Patent metadata

Field	Value
Publication number	US-8928053-B2
Application number	US-201113217553-A
Country	US
Kind code	B2
Filing date	Aug 25, 2011
Priority date	Aug 27, 2010
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

An input/output device includes a display circuit which changes its display state in accordance with a display data signal; a plurality of photodetector circuits which generate optical data in accordance with illuminance of light entering the photodetector circuits; wherein the photodetector circuits each include X (a natural number of 2 or more) photoelectric conversion elements; X charge accumulation control transistors in which one of a source and a drain is electrically connected to a second current terminal of one photoelectric conversion element of the X photoelectric conversion elements, and one charge accumulation control signal of X charge accumulation control signals from the photodetector circuit control section is input to the gate; and an amplifying transistor in which a gate is electrically connected to one of the source and the drain of each of the X charge accumulation control transistors.

First claim

What is claimed is:

1. A semiconductor device comprising:
a pixel portion configured to display an image, the pixel portion comprising:
a first photoelectric conversion element;
a second photoelectric conversion element;
a first transistor;
a second transistor; and
a third transistor; and
a fourth transistor,

wherein the first photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor,
wherein the second photo…

Assignees

• Kurokawa Yoshiyuki
• Semiconductor Energy Lab

Inventors

• Kurokawa Yoshiyuki

Classifications

• H04N25/778 Primary

  Electricity · mapped topic

• G09G3/36

  Physics · mapped topic

• G06F3/041 Primary

  Physics · mapped topic