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Signal reading circuit

A technology for reading circuits and signals, which is applied in television, electrical components, image communication, etc., can solve problems such as reducing the area and occupying the area of ​​circuit components, and achieve the effect of reducing the number of components, increasing the area, and realizing circuit correction

Active Publication Date: 2019-07-05
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an approach requires additional circuit elements in the sensing circuit, which makes the circuit elements occupy more area, but reduces the area used for photoelectric conversion.

Method used

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Embodiment Construction

[0063] The detailed features and advantages of the present invention are described in detail below in the embodiments, the content of which is sufficient to enable any person familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of the patent application and the drawings , anyone skilled in the relevant art can easily understand the related objects and advantages of the present invention. The following examples are to further describe the viewpoints of the present invention in detail, but not to limit the scope of the present invention in any way.

[0064] Please refer to figure 1 and figure 2 , figure 1 It is a schematic functional block diagram of a signal reading circuit according to an embodiment of the present invention, figure 2 It is a schematic circuit diagram of one of the signal reading sub-circuits according to an embodimen...

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Abstract

The invention discloses a signal reading circuit comprising a plurality of signal reading sub-circuits. Each signal reading sub-circuit includes a coupling switch and a reading module. The first terminal of the follower switch is used for receiving the first reference voltage. The control terminal of the follower switch is used for receiving an input signal. The follower switch generates current to the second terminal of the follower switch according to the received input signal. Each reading module receives one of the input signals. Each reading module is coupled to the control terminal of the follower switch. Each reading module selectively provides the received input signal to the control end of the follower switch according to the reading control signal.

Description

technical field [0001] The present invention relates to a signal reading circuit, in particular to a signal reading circuit of an active pixel sensor. Background technique [0002] The active pixel sensor (active pixel sensor, APS) uses the sensing circuit built in each pixel to generate photoelectric signals in response to light irradiation, and selectively reads out each pixel according to the X-Y address of each pixel optical signal. Generally speaking, when the area used for photoelectric conversion in the sensing circuit is larger, the active pixel sensor can have better sensitivity. [0003] However, in practice, due to force majeure factors in the manufacturing process, the parameters of the elements in the sensing circuit may not be as expected. For example, in today's glass manufacturing process, thin film transistors (thin film transistors, TFTs) at different locations are likely to have different threshold voltages. In addition, as the use time is prolonged, ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/378
CPCH04N25/75
Inventor 李雅华林承德刘育荣黄明益卢文哲李东霖
Owner AU OPTRONICS CORP