CN112135014A - Signal acquisition device - Google Patents
Signal acquisition device Download PDFInfo
- Publication number
- CN112135014A CN112135014A CN201910555675.5A CN201910555675A CN112135014A CN 112135014 A CN112135014 A CN 112135014A CN 201910555675 A CN201910555675 A CN 201910555675A CN 112135014 A CN112135014 A CN 112135014A
- Authority
- CN
- China
- Prior art keywords
- signal
- electrical signal
- electrical
- acquisition device
- photosensitive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007613 environmental effect Effects 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 abstract description 14
- 230000003287 optical effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Facsimile Heads (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Endoscopes (AREA)
Abstract
A signal acquisition device comprising: a controller for receiving a first electrical signal generated by the image sensor, the first electrical signal being obtained by converting signal light and ambient light; an ambient sensor for generating a second electrical signal, the second electrical signal being obtained by conversion of the ambient light; wherein the controller is further coupled to the environmental sensor to receive the second electrical signal and calculate a third electrical signal from the first and second electrical signals, the third electrical signal being indicative of the electrical signal obtained by the signal light conversion. The scheme provided by the invention can effectively eliminate the influence of ambient light on the image acquisition result and improve the imaging quality.
Description
Technical Field
The invention relates to the technical field of image sensors, in particular to a signal acquisition device.
Background
An image sensor (image sensor) is a sensor device that converts an optical image on a photosensitive surface into an electrical signal in a proportional relationship with the optical image, using a photoelectric conversion function of an optoelectronic device.
Taking an optical fingerprint sensor as an example, the optical fingerprint sensor is generally composed of a pixel array, each pixel in the pixel array has a photosensitive element to realize conversion of an optical signal into an electrical signal.
Currently, image sensors are continuously developing towards large size, high resolution, high imaging quality and low cost. In addition, in recent years, the information acquired by the image is more important due to the vigorous development of artificial intelligence, which puts higher requirements on the resolution and the imaging quality of the image sensor.
The existing photoelectric device applied to the image sensor is usually a photodiode (Photo-Diode), and is inevitably affected by interference factors such as ambient light and the like during operation, so that the imaging quality is poor.
Disclosure of Invention
The invention solves the technical problem of how to eliminate the influence of ambient light on an image acquisition result and improve the imaging quality.
To solve the above technical problem, an embodiment of the present invention provides a signal acquisition device, including: a controller for receiving a first electrical signal generated by the image sensor, the first electrical signal being obtained by converting signal light and ambient light; an ambient sensor for generating a second electrical signal, the second electrical signal being obtained by conversion of the ambient light; wherein the controller is further coupled to the environmental sensor to receive the second electrical signal and calculate a third electrical signal from the first and second electrical signals, the third electrical signal being indicative of the electrical signal obtained by the signal light conversion.
Optionally, the controller and the environmental sensor are integrated on the same semiconductor chip.
Optionally, the calculating a third electrical signal according to the first electrical signal and the second electrical signal includes: receiving the first electrical signal; receiving the second electrical signal; correcting the second electric signal to obtain a fourth electric signal; determining a difference of the first electrical signal and the fourth electrical signal as the third electrical signal.
Optionally, the modifying the second electrical signal to obtain a fourth electrical signal includes: and determining the fourth electric signal according to the proportional relation between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element and the second electric signal, wherein the second photosensitive element is used for generating the second electric signal, and the first photosensitive element is used for generating the first electric signal.
Optionally, the second photosensitive elements are integrated in the environmental sensor, and the number of the second photosensitive elements is 1.
Optionally, the environment sensor includes a plurality of second light sensing elements, and the second light sensing elements are configured to generate the second electrical signal.
Optionally, the modifying the second electrical signal to obtain a fourth electrical signal includes: generating a preprocessed second electrical signal based on the second electrical signals generated by each of the plurality of second photosensitive elements; and determining the fourth electric signal according to the proportional relation between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element and the preprocessed second electric signal, wherein the first photosensitive element is used for generating the first electric signal.
Optionally, the generating a preprocessed second electrical signal based on the second electrical signal generated by each of the plurality of second photosensitive elements includes: determining an average of a plurality of second electrical signals as the pre-processed second electrical signal; alternatively, determining a minimum value of the plurality of second electrical signals as the pre-processed second electrical signal; or, the second electrical signal with the highest probability of occurrence of the numerical value in the plurality of second electrical signals is determined as the preprocessed second electrical signal.
Optionally, the environment sensor is independent from the controller, and the plurality of second photosensitive elements are distributed at different positions of the plane where the image sensor is located.
Optionally, the distance between the environmental sensor and the image sensor is not greater than 5 cm.
Optionally, the image sensor includes a plurality of pixels arranged in an array, where each pixel includes a first photosensitive element and a pixel switch connected in series, and the first photosensitive element is configured to generate the first electrical signal.
Optionally, the pixel further comprises a buffer and an amplifier.
Optionally, the image sensor further includes: and a plurality of data lines, wherein in each row of pixels, each pixel is connected with the same data line, a first electric signal generated by the first photosensitive element in each pixel is transmitted to the data line through the pixel switch, and the output end of the data line is coupled to the controller.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
an embodiment of the present invention provides a signal acquisition apparatus, including: the controller is coupled with an image sensor to receive a first electric signal generated by the image sensor, and the first electric signal is obtained by converting signal light and ambient light; an environment sensor for acquiring a second electrical signal, the second electrical signal being obtained by the ambient light conversion; wherein the controller is further coupled to the environmental sensor to receive the second electrical signal and calculate a third electrical signal from the first and second electrical signals, the third electrical signal being indicative of the electrical signal obtained by the signal light conversion. Compared with the prior art, the image sensing system provided by the embodiment of the invention can effectively eliminate the influence of ambient light on the image acquisition result and improve the imaging quality. Specifically, the influence of ambient light on the imaging result of the image sensor is suppressed by adding an ambient sensor to collect ambient light alone without changing the device structure of the conventional image sensor and correcting the first electric signal output by the image sensor.
Further, the controller and the environmental sensor are integrated on the same semiconductor chip. Therefore, the influence of ambient light on an imaging result can be effectively corrected by finely adjusting the original signal acquisition device for reading and processing the output signal of the image sensor, and an image with higher quality is obtained. Furthermore, this embodiment the signal acquisition device can be compatible current image sensor, need not additionally to improve image sensor, and implementation cost is low.
Drawings
Fig. 1 is a schematic view of a signal acquisition device according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating the calculation of the third electrical signal in the embodiment of FIG. 1;
FIG. 3 is a schematic view of a signal acquisition device according to a second embodiment of the present invention;
FIG. 4 is a flowchart of one embodiment of step S103 of FIG. 2;
fig. 5 is a schematic diagram of a signal acquisition device according to a third embodiment of the present invention.
Detailed Description
As background art, the conventional photoelectric device applied to the image sensor is usually a photodiode (Photo-Diode), and is inevitably affected by interference factors such as ambient light during operation, resulting in poor imaging quality.
To solve the above technical problem, an embodiment of the present invention provides a signal acquisition device, including: the controller is coupled with an image sensor to receive a first electric signal generated by the image sensor, and the first electric signal is obtained by converting signal light and ambient light; an environment sensor for acquiring a second electrical signal, the second electrical signal being obtained by the ambient light conversion; wherein the controller is further coupled to the environmental sensor to receive the second electrical signal and calculate a third electrical signal from the first and second electrical signals, the third electrical signal being indicative of the electrical signal obtained by the signal light conversion.
The image sensing system can effectively eliminate the influence of ambient light on an image acquisition result and improve the imaging quality. Specifically, the influence of ambient light on the imaging result of the image sensor is suppressed by adding an ambient sensor to collect ambient light alone without changing the device structure of the conventional image sensor and correcting the first electric signal output by the image sensor.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a schematic diagram of a signal acquisition device according to a first embodiment of the present invention.
The signal acquisition device 1 of the present embodiment may be applied to an image acquisition scene, such as an optical fingerprint acquisition scene. The signal acquisition device 1 may be coupled to an image sensor 2 to receive image information acquired by the image sensor 2, where the image information may be an optical fingerprint image, and the image sensor 2 may be an optical fingerprint sensor.
To show the device structure more clearly, the image sensor 2 in fig. 1 shows only the specific structure of a single pixel in the pixel array.
Specifically, the signal acquisition device 1 of the present embodiment may include: a controller 10 for receiving a first electrical signal generated by the image sensor 2, the first electrical signal being obtained by converting signal light and ambient light; an environment sensor 11 for generating a second electrical signal, the second electrical signal being obtained by conversion of the ambient light; wherein the controller 10 is further coupled to the environment sensor 11 to receive the second electrical signal, and calculate a third electrical signal from the first electrical signal and the second electrical signal, the third electrical signal being used to represent the electrical signal obtained by the signal light conversion.
In a specific implementation, the image sensor 2 may include a plurality of pixels 20 arranged in an array, wherein each pixel 20 includes a first photosensitive element 201 and a pixel switch 202 connected in series, and the first photosensitive element 201 is configured to generate the first electrical signal.
In a specific implementation, the image sensor 2 may further include: a plurality of data lines (labeled as c 1-cn in the figure), wherein, in each row of pixels 20, each pixel 20 is connected to the same data line ci, the first electrical signal generated by the first photosensitive element 201 in each pixel 20 is transmitted to the data line ci through the pixel switch 202, the output end of the data line ci is coupled to the controller 10, i is greater than or equal to 1 and less than or equal to n, and i is a positive integer.
The output terminals of the different data lines ci are respectively coupled to different ports of the controller 10. Thus, the controller 10 can receive and process the first electrical signals transmitted by the data lines ci respectively.
In a specific implementation, the environmental sensor 11 may include a second photosensitive element 110, and the second photosensitive element 110 is configured to generate the second electrical signal.
In a specific implementation, the pixel switch 202 is typically a Thin Film Transistor (TFT) device, and the photosensitive element is used to collect an externally input optical signal and convert the optical signal into an electrical signal, and then store the electrical signal in a corresponding pixel. In this embodiment, the light signals collected by the first photosensitive element 201 include an ambient light signal and a signal light signal, and the collected light signals are converted into first electrical signals and stored in the corresponding pixels 20; the light signal collected by the second photosensitive element 110 includes the ambient light signal, and the collected light signal is converted into a second electrical signal and output. In an optical fingerprint acquisition scene, the signal light signal carries fingerprint information.
In a specific implementation, the first photosensitive element 201 and the second photosensitive element 110 may be photodiodes. The photodiode may include a PIN junction amorphous silicon photodiode, a PN junction amorphous silicon photodiode, a PIN junction low-temperature polycrystalline silicon photodiode, a PN junction low-temperature polycrystalline silicon photodiode, a PIN junction organic matter photodiode, or a PN junction organic matter photodiode, or the like.
In a specific implementation, the controller 10 and the environmental sensor 11 may be integrated on the same semiconductor chip. Therefore, the influence of ambient light on an imaging result can be effectively corrected by finely adjusting the original signal acquisition device 1 for reading and processing the output signal of the image sensor 2, and an image with higher quality is obtained. Further, the signal acquisition device 1 of the present embodiment can be compatible with the existing image sensor 2, and does not need to additionally improve the image sensor 2, so that the implementation cost is low.
For example, the environmental sensor 11 may be integrated on an existing control chip for reading and processing the image signal acquired by the image sensor 2 to acquire the second electrical signal, and modify the first electrical signal based on the second electrical signal to obtain the third electrical signal.
In a specific implementation, referring to fig. 1, the number of the second photosensitive elements 201 may be 1, and the controller 10 may include a Control Unit (Control Unit)101, configured to perform data processing operations such as analog-to-Digital Conversion (ADC) on the second electrical signal generated by the second photosensitive element 201.
In a specific implementation, referring to fig. 2, the calculating the third electrical signal according to the first electrical signal and the second electrical signal may include the following steps:
step S101, receiving the first electric signal;
step S102, receiving the second electric signal;
step S103, correcting the second electric signal to obtain a fourth electric signal;
step S104, determining a difference between the first electrical signal and the fourth electrical signal as the third electrical signal.
In a specific implementation, the step S101 and the step S102 may be executed synchronously or asynchronously, and the execution sequence of the step S101 and the step S102 may be interchanged during asynchronous execution.
In a specific implementation, the step S103 may include the steps of: and determining the fourth electric signal according to the proportional relation between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element and the second electric signal.
For example, the third electrical signal may be calculated based on the following formula:
Iout＝I1-αI2；
wherein, IoutIs the third electrical signal; i is1Is the first electrical signal; α is a proportional relationship between the photosensitive area of the second photosensitive element 110 and the photosensitive area of the first photosensitive element 201; i is2Is the second electrical signal; alpha I2Is the fourth electrical signal.
In a specific implementation, the second photosensitive element 110 and the first photosensitive element 201 may employ photodiodes with different specifications, for example, the photosensitive area of the second photosensitive element 110 may be larger than that of the first photosensitive element 201, so as to ensure that the ambient light signal of the image sensor 2 is effectively collected. The difference in the sensing result of the ambient light caused by the difference in the photosensitive areas can be corrected by the proportional relationship between the photosensitive area of the second photosensitive element 110 and the photosensitive area of the first photosensitive element 201, so that the ambient light signal portion in the first electrical signal transmitted by the data line ci can be substantially eliminated by the fourth electrical signal.
In a specific implementation, the controller 10 may further include a current source 102 for receiving the fourth electrical signal. The current sources 102 may correspond to the data lines ci one to receive the first electrical signal transmitted by the corresponding data lines ci, and each current source 102 is coupled to the control unit 101 to receive the fourth electrical signal.
For each data line ci, the photocurrent (i.e., the third electrical signal) finally output by the data line ci is a superimposed signal of the corresponding first electrical signal and the fourth electrical signal received by the corresponding current source 102. I.e. the difference between the first electrical signal and the fourth electrical signal.
In a variation, the photosensitive area of the second photosensitive element 110 may be the same as the photosensitive area of the first photosensitive element 201, and accordingly, the proportional relationship α may be 1.
In a specific implementation, the distance between the environment sensor 11 and the image sensor 2 is not greater than 5 cm, so as to ensure that the second photosensitive element 110 can effectively acquire an environment light signal of the environment in which the image sensor 2 is located.
By adopting the scheme of the embodiment, the influence of the ambient light on the image acquisition result can be effectively eliminated, and the imaging quality is improved. Specifically, the influence of the ambient light on the imaging result of the image sensor 2 is suppressed by adding the ambient sensor 11 to collect the ambient light alone without changing the device configuration of the conventional image sensor 2 and correcting the first electric signal output by the image sensor 2.
Fig. 3 is a schematic diagram of a signal acquisition device according to a second embodiment of the present invention. In the following detailed explanation, descriptions about matters and features common to the first embodiment shown in fig. 1 are omitted, and only different points are explained. In particular, the same operational effects produced by the same structures are not mentioned one by one for each embodiment. Like parts are designated by like reference numerals throughout the several views.
Only the differences of the second embodiment from the first embodiment shown in fig. 1 described above will be explained in detail.
In the present embodiment, the main differences from the signal acquisition device 1 shown in fig. 1 are as follows: the environmental sensor 11 may be a separate device from the controller 10.
For example, in an application scenario of performing optical fingerprint recognition on an intelligent terminal such as a mobile phone, the environmental sensor 11 may multiplex an existing ambient light sensing unit on the mobile phone, and the controller 10 is coupled to the ambient light sensing unit to receive the second electrical signal, and corrects the first electrical signal acquired by the image sensor 2 based on the second electrical signal.
In a specific implementation, such as when the environmental sensor 11 is an existing module on a multiplexed smart terminal, the environmental sensor 11 may include a plurality of second light-sensing elements 110.
Further, the plurality of second photosensitive elements 110 may be distributed at different positions of the plane where the image sensor 2 is located. For example, the plurality of second photosensitive elements 110 may be disposed around the image sensor 2 to uniformly and comprehensively collect the ambient light signal of the environment in which the image sensor 2 is located.
In a specific implementation, referring to fig. 4, the step S103 may include the following steps:
a step S1031 of generating a preprocessed second electric signal based on the second electric signals generated by the respective plurality of second light-sensing elements;
step S1032 is performed, and the fourth electrical signal is determined according to the proportional relationship between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element, and the preprocessed second electrical signal.
For example, the control unit 101 may perform analog-to-digital conversion and data operation on the plurality of second electrical signals to integrate and process the plurality of second electrical signals into an electrical signal proportional to the ambient light in which the image sensor 2 is actually located, which is the preprocessed second electrical signal.
In a specific implementation, the step S1031 may include the steps of: a plurality of second electrical signals (as shown in diagram I)2To I5) Is determined as the pre-processed second electrical signal. Therefore, by integrating the ambient light signals respectively collected by the second photosensitive elements 110 arranged at different positions on the periphery of the image sensor 2, an average ambient light signal of the image sensor 2 can be obtained, it is ensured that the ambient light signal represented by the fourth electrical signal is as close as possible to the actual ambient light of the environment where the image sensor 2 is located, and it is ensured that the finally obtained third electrical signal by cancellation can actually retain the signal light signal sensed by the image sensor 2, i.e., the signal light signal is not subtracted much and the ambient light signal is not remained.
In a variation, the step S1031 may include the steps of: and determining the minimum value of the plurality of second electric signals as the preprocessed second electric signals so as to avoid over-correction from influencing the image quality.
In a variation, the step S1031 may include the steps of: and determining the second electric signal with the highest numerical occurrence probability in the plurality of second electric signals as the preprocessed second electric signal. This also has the effect of avoiding over-correction.
In a specific implementation, the step S1032 can be expressed based on the following formula:
Iout＝I1-αI3；
wherein, IoutIs the third electrical signal; i is1Is the first electrical signal; α is a proportional relationship between the photosensitive area of the second photosensitive element 110 and the photosensitive area of the first photosensitive element 201; i is3Pre-processing the second electrical signal; alpha I3Is the firstFour electrical signals.
In a variation, the photosensitive areas of the second photosensitive elements 110 may be different, and accordingly, the proportional relationship α may be determined according to an average value of the photosensitive areas of the second photosensitive elements 110.
Fig. 5 is a schematic diagram of a signal acquisition device according to a third embodiment of the present invention.
In the present embodiment, the main differences from the signal acquisition device 1 shown in fig. 1 and 3 are as follows: for the image sensor 3 to which the signal acquisition apparatus 1 shown in fig. 5 is coupled, each pixel 30 included in the image sensor 3 may further include a buffer 203 and an amplifier 204 in addition to the first photosensitive element 201 and the pixel switch 202.
The buffer 203 may be a capacitor to store the first electrical signal converted by the corresponding first photosensitive element 201; the amplifier 204 may be a TFT. Thus, the pixels 30 are active pixels and the image sensor 3 is an active image sensor.
In an implementation, each of the second photosensitive elements 110 may also be correspondingly coupled to an amplifier (not shown) and a buffer (not shown) to buffer and amplify the collected second electrical signal.
Accordingly, the controller 10 may comprehensively determine the proportional relationship α according to the photosensitive area, the voltage of the amplifier coupled to the second photosensitive element 110, the size, and the like.
Although the above-described embodiment is to connect the data lines ci in units of rows, in practical applications, the concepts of rows and columns are interchangeable for a pixel array composed of the plurality of pixels 20. That is, for each data line ci, the data line ci may be coupled to a plurality of pixels 20 of a corresponding column.
In one implementation, the controller 10 may be an Integrated Circuit (IC) chip.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A signal acquisition device, comprising:
a controller for receiving a first electrical signal generated by the image sensor, the first electrical signal being obtained by converting signal light and ambient light;
an ambient sensor for generating a second electrical signal, the second electrical signal being obtained by conversion of the ambient light;
wherein the controller is further coupled to the environmental sensor to receive the second electrical signal and calculate a third electrical signal from the first and second electrical signals, the third electrical signal being indicative of the electrical signal obtained by the signal light conversion.
2. The signal acquisition device of claim 1 wherein the controller is integrated with the environmental sensor on the same semiconductor chip.
3. The signal acquisition device of claim 1, wherein calculating a third electrical signal from the first and second electrical signals comprises:
receiving the first electrical signal;
receiving the second electrical signal;
correcting the second electric signal to obtain a fourth electric signal;
determining a difference of the first electrical signal and the fourth electrical signal as the third electrical signal.
4. The signal acquisition device of claim 3, wherein the modifying the second electrical signal to obtain a fourth electrical signal comprises:
and determining the fourth electric signal according to the proportional relation between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element and the second electric signal, wherein the second photosensitive element is used for generating the second electric signal, and the first photosensitive element is used for generating the first electric signal.
5. The signal acquisition device of claim 4 wherein the second photosensitive elements are integrated with the environmental sensor and the number of the second photosensitive elements is 1.
6. The signal acquisition device of claim 3 wherein the environmental sensor comprises a plurality of second photosensitive elements for generating the second electrical signal.
7. The signal acquisition device of claim 6, wherein the modifying the second electrical signal to obtain a fourth electrical signal comprises:
generating a preprocessed second electrical signal based on the second electrical signals generated by each of the plurality of second photosensitive elements;
and determining the fourth electric signal according to the proportional relation between the photosensitive area of the second photosensitive element and the photosensitive area of the first photosensitive element and the preprocessed second electric signal, wherein the first photosensitive element is used for generating the first electric signal.
8. The signal acquisition device of claim 7 wherein the generating a pre-processed second electrical signal based on the second electrical signal generated by each of the plurality of second photosensitive elements comprises:
determining an average of a plurality of second electrical signals as the pre-processed second electrical signal; or,
determining a minimum value of a plurality of second electrical signals as the pre-processed second electrical signal; or,
and determining the second electric signal with the highest numerical occurrence probability in the plurality of second electric signals as the preprocessed second electric signal.
9. The signal acquisition device of claim 6, wherein the environmental sensor is independent of the controller, and the plurality of second photosensitive elements are distributed at different positions in a plane of the image sensor.
10. The signal acquisition device of claim 1 wherein the distance between the environmental sensor and the image sensor is no greater than 5 centimeters.
11. The signal acquisition device according to any one of claims 1 to 10, wherein the image sensor comprises a plurality of pixels arranged in an array, wherein each pixel comprises a first photosensitive element and a pixel switch connected in series, and the first photosensitive element is configured to generate the first electrical signal.
12. The signal acquisition device of claim 11 wherein the pixel further comprises a buffer and an amplifier.
13. The signal acquisition device of claim 11, wherein the image sensor further comprises:
and a plurality of data lines, wherein in each row of pixels, each pixel is connected with the same data line, a first electric signal generated by the first photosensitive element in each pixel is transmitted to the data line through the pixel switch, and the output end of the data line is coupled to the controller.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555675.5A CN112135014B (en) | 2019-06-25 | 2019-06-25 | Signal acquisition device |
| US16/909,732 US11317040B2 (en) | 2019-06-25 | 2020-06-23 | Image sensing apparatus |
| TW109121643A TWI759781B (en) | 2019-06-25 | 2020-06-24 | Image sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555675.5A CN112135014B (en) | 2019-06-25 | 2019-06-25 | Signal acquisition device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112135014A true CN112135014A (en) | 2020-12-25 |
| CN112135014B CN112135014B (en) | 2022-09-06 |
Family
ID=73849185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910555675.5A Active CN112135014B (en) | 2019-06-25 | 2019-06-25 | Signal acquisition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112135014B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040252867A1 (en) * | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
| US20080246856A1 (en) * | 2007-04-03 | 2008-10-09 | Kazuaki Shibuya | Imaging apparatus and imaging method |
| US20130119237A1 (en) * | 2011-11-12 | 2013-05-16 | Daniel H. Raguin | Ambient light illumination for non-imaging contact sensors |
| US20140055635A1 (en) * | 2012-08-21 | 2014-02-27 | Samsung Electronics Co., Ltd. | Image sensor and electronic device including the same |
| CN107005685A (en) * | 2014-09-24 | 2017-08-01 | （株）奈克斯其布斯 | Utilize camera video correction/control device and method of color/illuminance transducer |
| CN107580185A (en) * | 2017-09-30 | 2018-01-12 | 德淮半导体有限公司 | Imaging sensor and operating method and imaging device |
-
2019
- 2019-06-25 CN CN201910555675.5A patent/CN112135014B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040252867A1 (en) * | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
| US20080246856A1 (en) * | 2007-04-03 | 2008-10-09 | Kazuaki Shibuya | Imaging apparatus and imaging method |
| US20130119237A1 (en) * | 2011-11-12 | 2013-05-16 | Daniel H. Raguin | Ambient light illumination for non-imaging contact sensors |
| US20140055635A1 (en) * | 2012-08-21 | 2014-02-27 | Samsung Electronics Co., Ltd. | Image sensor and electronic device including the same |
| CN107005685A (en) * | 2014-09-24 | 2017-08-01 | （株）奈克斯其布斯 | Utilize camera video correction/control device and method of color/illuminance transducer |
| CN107580185A (en) * | 2017-09-30 | 2018-01-12 | 德淮半导体有限公司 | Imaging sensor and operating method and imaging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112135014B (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10868990B2 (en) | Active pixel sensor and driving method thereof, imager and electronic device | |
| US9631974B2 (en) | Photoarray, particularly for combining sampled brightness sensing with asynchronous detection of time-dependent image data | |
| CN100426849C (en) | Solid-state image pickup apparatus | |
| US20190058058A1 (en) | Detection circuit for photo sensor with stacked substrates | |
| CN100515050C (en) | Solid-state image pickup device, method of driving same and imaging apparatus | |
| TW201911857A (en) | Photo sensor, electronic device including the photo sensor and a method for varying exposure time of pixels in photo sensor using motion prediction | |
| CN111033745A (en) | Stacked photosensor assembly with pixel level interconnects | |
| CN111955002A (en) | Global shutter image sensor | |
| CN108168695B (en) | Light detection unit and method, light detection circuit and method, and display device | |
| US20230232132A1 (en) | Pixel and method for operating a pixel | |
| US5917960A (en) | Image correlator, an image processing apparatus using the same, and a signal adder used in the image correlator | |
| KR20130106636A (en) | Image capture device and signal compensating method of image capture device | |
| JP2019532522A (en) | Pixel detection circuit and driving method thereof, image sensor, and electronic device | |
| US11089191B2 (en) | Image sensor, recording apparatus, and reset method | |
| US10051216B2 (en) | Imaging apparatus and imaging method thereof using correlated double sampling | |
| CN112135071B (en) | Image sensing system | |
| CN112135014B (en) | Signal acquisition device | |
| CN109671384B (en) | Terminal and photosensitive detection method for terminal | |
| JP2022505571A (en) | Ultra high dynamic range CMOS sensor | |
| TWI766411B (en) | Imaging sensor and electronic device | |
| TWI759781B (en) | Image sensing device | |
| CN213637981U (en) | Image sensing device | |
| CN112218011B (en) | Image sensor | |
| CN112532899B (en) | Photoelectric conversion circuit, driving method, photoelectric detection substrate, and photoelectric detection device | |
| KR100975444B1 (en) | Image sensor with compensating block for reset voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |