CIS sensor having linear logarithm output

A linear logarithmic and sensor technology, applied in color TV parts, TV system parts, TV and other directions, can solve the problem of difficult to detect changes in light intensity, improve additional memory storage function, improve leakage current performance, the effect of improving the sensitivity of light sensing

Active Publication Date: 2021-03-26
SHANGHAI HUALI MICROELECTRONICS CORP
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Problems solved by technology

However, considering the alternation of time and the number of working pixels, it is not easy to detect the change of light intensity

Method used

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  • CIS sensor having linear logarithm output
  • CIS sensor having linear logarithm output
  • CIS sensor having linear logarithm output

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Embodiment Construction

[0037] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0038] image 3 It is a structural schematic diagram of a CIS sensor with linear logarithmic output in the present invention. Such as image 3 As shown, the present invention has a CIS sensor with linear logarithmic output, and each active pixel structure includes a photoelectric sensing module 10, a charge transfer module 20, a linear logarithmic module 30, a source follower module 40 and...

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Abstract

The invention discloses a CIS sensor with linear logarithm output. The sensor comprises a photoelectric induction module which is used for converting an optical signal into a photoelectric signal; a charge transmission module used for transmitting the photoelectric signal generated by the photoelectric sensing module to a floating node FD under the control of a transmission control signal TX; a linear logarithm module used for outputting a linear signal level or a logarithm signal level under the control of a memory resistor, and maintaining the memory of illumination so as to maintain the linear or logarithm output of illumination intensity selection; a source follower module used for isolating and outputting charges of the floating node FD; and a selection module used for transmitting the photoelectric signal isolated and output by the source follower module to a subsequent circuit under the control of an output word line WL of a decoding circuit.

Description

technical field [0001] The invention relates to the technical field of CIS (CMOS Image Sensor, CIS) sensors, in particular to a novel CIS sensor with linear logarithmic output in which a CIS sensor is combined with a memristor. Background technique [0002] The main goal of image sensor design is to maintain small pixel size and high sensitivity in low light. Existing image sensors with a hybrid log-linear output characteristic produce a linear output in dark conditions, while high-brightness areas provide logarithmic responsiveness. However, considering the alternation of time and the number of working pixels, it is not easy to detect the change of light intensity. Also, when a pixel changes due to its previous history, the change should be recorded. [0003] Figure 1a and Figure 1b The typical 4T active pixel structure of the existing CMOS image sensor (CMOS Image Sensor, CIS) is revealed, in which Figure 1a is a linear sensor, Figure 1b As a logarithmic sensor, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/374H04N5/3745H04N5/378H04N5/14
CPCH04N5/14H04N25/76H04N25/77H04N25/75
Inventor 刘琦王明梅翠玉
Owner SHANGHAI HUALI MICROELECTRONICS CORP
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