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Detection device

A detection device and detection element technology, which are applied in radiation control devices, measurement circuits, and photometry using electrical radiation detectors, etc., can solve the problems of reduced detection accuracy and increased threshold voltage deviation.

Pending Publication Date: 2022-04-15
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When both the expansion of the sensor area and the high definition are desired, the variation in the threshold voltage increases due to the miniaturization of the source follower transistor, and there is a possibility that the detection accuracy will decrease

Method used

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Embodiment Construction

[0027] Modes (embodiments) for carrying out the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the contents described in the following embodiments. In addition, the constituent elements described below include elements that can be easily conceived by those skilled in the art and substantially the same elements. Furthermore, the constituent elements described below can be appropriately combined. In addition, the disclosure is merely an example, and appropriate modifications that can be easily conceived by those skilled in the art while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, in order to clarify the description, the drawings may schematically show the width, thickness, shape, etc. of each part compared with the actual situation, but this is just an example and does not limit the interpretation of the present inve...

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Abstract

The invention provides a detection device which can improve detection precision. The detection device includes: a plurality of detection elements arranged in a matrix; a plurality of scan lines connected to the plurality of detection elements arranged in the first direction and supplying a plurality of drive signals to the detection elements; a plurality of output signal lines connected to the plurality of detection elements arranged in the second direction and outputting detection signals; a drive circuit that supplies a plurality of drive signals to the detection element; and a detection circuit to which a detection signal is supplied via the output signal line. The detection element is provided with: a photoelectric conversion element; a source follower transistor that outputs a signal corresponding to the charge generated by the photoelectric conversion element; and a readout transistor that reads out an output signal of the source follower transistor and outputs a detection signal. In the reset period, an initial voltage in which a predetermined reference voltage and a threshold voltage of the source follower transistor are superimposed is applied to the photoelectric conversion element.

Description

technical field [0001] The present invention relates to detection devices. Background technique [0002] For example, a photoelectric conversion device using a PIN (Positive Intrinsic Negative Diode: Positive Intrinsic Negative Diode) type photodiode as a photoelectric conversion element for detection is known (for example, refer to Patent Document 1). Such a photoelectric conversion device has a field effect transistor that receives a signal charge generated in a photoelectric conversion portion through a gate, and a device for reading a signal voltage corresponding to the signal charge received through the field effect transistor to a signal line is provided for each pixel. The source follower transistor transfers charges based on input information photoelectrically converted by the photoelectric conversion unit to an external capacitor, and is converted into a signal voltage by the external capacitor. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2011-10054 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/146G06V40/12
CPCG01J1/44G06V40/1318
Inventor 小出元
Owner JAPAN DISPLAY INC