Light sensing circuit, and remote optical touch panel and image acquisition apparatus including the light sensing circuit

摘要

Example embodiments are directed to light sensing circuits having a relatively simpler structure by using light-sensitive oxide semiconductor transistors as light sensing devices, and remote optical touch panels and image acquisition apparatuses, each including the light sensing circuits. The light sensing circuit includes a light-sensitive oxide semiconductor transistor in each pixel, wherein the light-sensitive oxide semiconductor transistor is configured as a light sensing device, and a driving circuit that outputs data. The light sensing circuit may have a relatively simple circuit structure including a plurality of transistors in one pixel. As a result, the structure and operation of the light sensing circuit may be simplified.

主权项

1. A light sensing circuit, comprising:
a light-sensitive oxide semiconductor transistor including a channel layer of a light-sensitive oxide semiconductor, a row selection line supplying a row selection signal to a gate of the light-sensitive oxide semiconductor transistor; a driving voltage line supplying a driving voltage to a drain of the light-sensitive oxide semiconductor transistor; and a data line connected to a source of the light-sensitive oxide semiconductor transistor and outputting data, the light-sensitive oxide semiconductor transistor being configured to operate as a light sensing device that senses light incident on the transistor and as a switching circuit that outputs data in response to the sensed incident light without storing charges associated with the incident light, in a storage element, wherein, when the gate voltage is a first voltage, the channel layer is in a non-conducting state irrespective of an intensity or amount of the incident light and no data is outputted, and when the gate voltage is a second voltage, the channel layer is in a conducting state when light is incident on the transistor and data is outputted as current corresponding to an intensity or an amount of the incident light.