CN107346089B - Image sensor, camera module and electronic device - Google Patents
Image sensor, camera module and electronic device Download PDFInfo
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- CN107346089B CN107346089B CN201710524875.5A CN201710524875A CN107346089B CN 107346089 B CN107346089 B CN 107346089B CN 201710524875 A CN201710524875 A CN 201710524875A CN 107346089 B CN107346089 B CN 107346089B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- 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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
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- 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
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- 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
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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Abstract
The image sensor disclosed by the invention comprises a photosensitive pixel array, a light filtering unit array covering the photosensitive pixel array and a control circuit. The photosensitive pixel array includes a plurality of photosensitive pixels. The light filtering unit array comprises a plurality of light filtering units, each light filtering unit comprises an infrared light filtering area and a color light filtering area, photosensitive pixels covered by the infrared light filtering areas form iris identification pixels, and photosensitive pixels covered by the color light filtering areas form color image pixels. The control circuit is used for controlling the iris recognition pixels to acquire iris image signals and controlling the color image pixels to acquire color image signals; or the control circuit is used for controlling the iris identification pixels to acquire the iris image signals and controlling the color image pixels and the iris identification pixels to acquire the color image signals together. The image sensor can realize iris image acquisition and color image acquisition. The invention also discloses a camera module and an electronic device.
Description
Technical Field
The invention relates to the technical field of imaging, in particular to an image sensor, a camera module and an electronic device.
Background
Generally, iris recognition requires a special iris camera to obtain an iris image, and thus, the existing electronic device needs to be provided with the special iris camera in addition to the visible light camera for capturing color images, which not only increases the cost of the electronic device, but also occupies the space of the electronic device.
Disclosure of Invention
The embodiment of the invention provides an image sensor, a camera module and an electronic device.
An image sensor according to an embodiment of the present invention includes:
a photosensitive pixel array including a plurality of photosensitive pixels;
the light filtering unit array covers the light sensing pixel array, the light filtering unit array comprises a plurality of light filtering units, each light filtering unit comprises an infrared light filtering area and a color light filtering area, the light sensing pixels covered by the infrared light filtering areas form iris identification pixels, and the light sensing pixels covered by the color light filtering areas form color image pixels; and
a control circuit for controlling the operation of the electronic device,
the control circuit is used for controlling the iris identification pixels to acquire iris image signals and controlling the color image pixels to acquire color image signals; or
The control circuit is used for controlling the iris identification pixels to acquire iris image signals and controlling the color image pixels and the iris identification pixels to acquire color image signals together.
In some embodiments, the output of the photosensitive pixels covered by the color filter region corresponds to color pixel values; the output of the photosensitive pixel covered by the infrared filter area corresponds to an infrared pixel value;
when the control circuit controls the color image pixels and the iris identification pixels to jointly acquire color image signals, the control circuit is used for subtracting the adjacent infrared pixel values from the color pixel values to obtain actual pixel values of all the color image pixels of the color image.
In some embodiments, the infrared filter regions form an array arrangement.
In some embodiments, each of the filtering units includes two infrared filter regions and two color filter regions, and the infrared filter regions and the color filter regions in each of the filtering units are alternately arranged at intervals.
In some embodiments, each of the filtering units includes one of the infrared filter regions and two of the color filter regions, and the infrared filter region in each of the filtering units is disposed between or on one side of the two of the color filter regions.
In some embodiments, the array of filter cells is a bayer array.
The camera module of the embodiment of the invention comprises:
the image sensor according to any one of the above embodiments; and
and the image processor is connected with the control circuit and is used for processing the iris image signal to obtain an iris image and processing the color image signal to obtain a color image.
An electronic device according to an embodiment of the present invention includes:
a body; and
in the camera module of the above embodiment, the camera module is disposed on the body, and the camera module further includes a lens module, and the image sensor is opposite to the lens module.
In some embodiments, the electronic device includes a central processing unit connected to the camera module and a memory, and the central processing unit is configured to control the memory to store the color image or/and the iris image.
In some embodiments, the electronic device further includes a central processing unit connected to the camera module, and a display device, wherein the central processing unit is configured to control the display device to display the color image or/and the iris image.
The electronic device, the camera module and the filtering unit of the image sensor comprise the infrared filtering area and the color filtering area, so that light entering the iris identification pixels mainly comprises infrared light, and light entering the color image pixels mainly comprises visible light, the image sensor can obtain iris image signals from the iris identification pixels and color image signals from the color image pixels, or the image sensor can obtain color image signals from the color image pixels and the iris identification pixels together, and further the image sensor can realize iris image acquisition and color image acquisition, so that the requirement for the iris image sensor and the color image sensor at the same time is avoided, the cost of the electronic device is reduced, and a space is reserved for arranging other functional units.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic plan view of an image sensor according to some embodiments of the invention;
FIG. 2 is a schematic perspective view of an image sensor according to some embodiments of the present invention;
FIG. 3 is a schematic structural diagram of an electrical junction device in accordance with certain embodiments of the present invention;
FIG. 4 is a cross-sectional view of a camera module in accordance with certain embodiments of the present invention;
FIG. 5 is a schematic plan view of an array of filter elements according to some embodiments of the invention;
FIG. 6 is a schematic plan view of an array of filter elements according to some embodiments of the invention; and
fig. 7 is a schematic plan view of an array of filter cells according to some embodiments of the invention.
Description of the main element symbols:
the image sensor 100, the photosensitive pixel array 10, the photosensitive pixel 12, the iris recognition pixel 122, the color image pixel 124, the filter unit array 20, the filter unit 22, the filter block unit 221, the infrared filter area 222, the infrared filter subunit 2222, the color filter area 224, the color filter subunit 2241, the green filter subunit 2242, the blue filter subunit 2244, the red filter subunit 2246, the control circuit 30, the electronic device 300, the camera module 301, the image processor 302, the lens module 303, the central processing unit 304, the memory 305, the display device 306, the main body 307, and the substrate 308.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 and 2, an image sensor 100 according to an embodiment of the invention includes a photosensitive pixel array 10, a filter unit array 20, and a control circuit 30. The array of photosensitive pixels 10 includes a plurality of photosensitive pixels 12. The filter unit array 20 covers the photosensitive pixel array 10. The filter unit array 20 includes a plurality of filter units 22, each filter unit 22 includes an infrared filter region 222 and a color filter region 224, the photosensitive pixels 12 covered by the infrared filter region 222 constitute the iris recognition pixels 122, and the photosensitive pixels 12 covered by the color filter region 224 constitute the color image pixels 124. The control circuit 30 is used for controlling the iris identification pixels 122 to acquire iris image signals, and the control circuit 30 is also used for controlling the color image pixels 124 to acquire color image signals; or, the control circuit 30 is configured to control the iris identification pixels 122 to acquire iris image signals, and the control circuit 30 is further configured to control the color image pixels 124 to acquire color image signals together with the iris identification pixels 122.
The infrared filter 222 is capable of passing infrared light and filtering out other light (e.g., visible light) so that the other light cannot pass, and the iris recognition pixels 122 are capable of receiving the infrared light passing through the infrared filter 222 and generating an iris image signal. The color filter region 224 is capable of passing visible light and filtering out other light (e.g., infrared light) such that the other light cannot pass, and the color image pixel 124 is capable of receiving the visible light passing through the color filter region 224 and generating a color image signal.
The filtering unit 22 of the image sensor 100 according to the embodiment of the present invention includes the infrared filtering region 222 and the color filtering region 224, so that the light entering the iris identification pixels 122 mainly includes infrared light and the light entering the color image pixels 124 mainly includes visible light, so that the image sensor 100 can obtain iris image signals from the iris identification pixels 122 and color image signals from the color image pixels 124; or the image sensor 100 can obtain color image signals from the color image pixels 124 and the iris identification pixels 122, and then the image sensor 100 can achieve both iris image acquisition and color image acquisition, thereby avoiding the need for an iris image sensor and a color image sensor, not only reducing the cost of the electronic device 300 (shown in fig. 3), but also making room for setting other functional units.
Referring to fig. 3, an electronic device 300 according to an embodiment of the invention includes a main body 307 and a camera module 301. The camera module 301 is mounted on the body 307. The electronic device 300 includes any one of a mobile phone, a tablet computer, a notebook computer, an intelligent watch, an intelligent bracelet, intelligent glasses, an intelligent helmet, and the like. In an embodiment of the present invention, the electronic device 300 is a mobile phone.
Referring to fig. 4, the camera module 301 includes the image sensor 100, a substrate 308, an image processor 302, and a lens module 303. The image sensor 100 and the lens module 303 are disposed on the substrate 308, and the image sensor 100 and the lens module 303 face each other and can be accommodated in the lens module 303. The image sensor 100 can generate both an iris image signal and a color image signal. The image processor 302 is configured to process the iris image signal to obtain an iris image, and to process the color image signal to obtain a color image.
Referring to fig. 1 and 2, an image sensor 100 according to an embodiment of the invention includes a photosensitive pixel array 10, a filter unit array 20, and a control circuit 30.
The array of photosensitive pixels 10 includes a plurality of photosensitive pixels 12.
Referring to fig. 2 and 5, the filter array 20 covers the photosensitive pixel array 10. The filter cell array 20 includes a plurality of filter cells 22. Each of the filter units 22 includes two infrared filter regions 222 and two color filter regions 224, and the infrared filter regions 222 and the color filter regions 224 in each of the filter units 22 are alternately disposed at intervals. Wherein the infrared filter area 222 only passes infrared light and filters out other light (e.g., visible light) so that the other light cannot pass, the infrared filter area 222 includes a plurality of infrared filter subunits 2222. The color filter region 224 passes only visible light and filters out other light (e.g., infrared light) so that the other light cannot pass. Specifically, the color filter area 224 includes a plurality of color filter subunits 2241, and the color filter subunit 2241 may be any one of a green filter subunit 2242, a blue filter subunit 2244, or a red filter subunit 2246. Among them, the green filter subunit 2242 passes only green light and filters other light so that other light cannot pass, the blue filter subunit 2244 passes only blue light and filters other light so that other light cannot pass, and the red filter subunit 2246 passes only red light and filters other light so that other light cannot pass. Each of the infrared light-filtering sub-units 2222 and the color light-filtering sub-units 2241 covers one of the photosensitive pixels 12, that is, each of the infrared light-filtering sub-units 2222, the green light-filtering sub-units 2242, the blue light-filtering sub-units 2244 and the red light-filtering sub-units 2246 covers one of the photosensitive pixels 12.
The photosensitive pixels 12 covered by the infrared filter region 222 constitute the iris recognition pixels 122, and the photosensitive pixels 12 covered by the color filter region 224 constitute the color image pixels 124. In other words, the photosensitive pixels 12 covered by the infrared filter region 222 are referred to as iris recognition pixels 122, and the photosensitive pixels 12 covered by the color filter region 224 are referred to as color image pixels 124. The iris recognition pixels 122 are capable of receiving infrared light and generating iris image signals including infrared pixel values, luminance values of the infrared light, and the like. Color image pixels 124 are capable of receiving visible light and producing color image signals that include color pixel values, luminance values of colored light, color values, and the like.
Each of the filter units 22 of the present embodiment covers 2 × 4 photosensitive pixels 12, specifically, each of the filter units 22 includes 2 infrared filter regions 222 and 2 color filter regions 224, and the infrared filter regions 222 and the color filter regions 224 are alternately disposed at intervals. Each of the infrared filter regions 222 includes 2 × 1 color filter subunits 2241, and each of the infrared filter regions 222 includes 2 × 1 infrared filter subunits 2222. That is, each of the filter units 22 includes 2 × 2 color filter subunits 2241 arranged in an array and 2 × 2 infrared filter subunits 2222 arranged in an array. The color filter subunits 2241 and the infrared filter subunits 2222 in the same row are alternately arranged at intervals. Specifically, the first row of the filtering unit 22 may be a red filtering subunit 2246, an infrared filtering subunit 2222, a green filtering subunit 2242 and an infrared filtering subunit 2222, respectively, and the second row of the filtering unit 22 may be a green filtering subunit 2242, an infrared filtering subunit 2222, a blue filtering subunit 2244 and an infrared filtering subunit 2222, respectively.
The photosensitive pixels 12 covered by the infrared filter area 222 constitute the iris recognition pixels 122, that is, 2 × 2 photosensitive pixels 12 covered by the 2 × 2 infrared filter subunits 2222 are the iris recognition pixels 122. The output of 2 × 2 photosensitive pixels 12 covered by the infrared filter region 222 corresponds to an iris image signal. The photosensitive pixels 12 covered by the color filter region 224 form the color image pixels 124, that is, the 2 × 2 photosensitive pixels 12 covered by the color filter region 224 are the color image pixels 124. The output of the photosensitive pixels 12 covered by the color filter regions 224 corresponds to color image signals.
The control circuit 30 is connected to the array of photosensitive pixels 10. The control circuit 30 may be used to control the iris recognition pixels 122 to acquire iris image signals and to control the color image pixels 124 to acquire color image signals. The iris recognition pixels 122 are capable of receiving infrared light and generating iris image signals including infrared pixel values, luminance values of the infrared light, and the like. The output of the photosensitive pixels 12 covered by the infrared filter region 222 corresponds to the infrared pixel value, that is, the output of the iris identification pixels 122 corresponds to the infrared pixel value. Color image pixels 124 are capable of receiving visible light and producing color image signals that include color pixel values, luminance values of colored light, color values, and the like. The output of the photosensitive pixels 12 covered by the color filter regions 224 corresponds to color pixel values, i.e., the output of the color image pixels 124 corresponds to color pixel values.
The control circuit 30 may also be used to control the iris recognition pixels 122 to acquire iris image signals, and to control the color image pixels 124 to acquire color image signals in conjunction with the iris recognition pixels 122. When the control circuit 30 controls the color image pixels 124 and the iris identification pixels 122 to collectively acquire a color image, the control circuit 30 is configured to subtract the adjacent infrared pixel values from the color pixel values to obtain actual pixel values of the color image pixels of the color image.
The electronic device 300, the camera module 301 and the filter unit array 20 of the image sensor 100 according to the embodiment of the present invention include the infrared filter area 222 and the color filter area 224, so that the light entering the iris identification pixels 122 mainly includes infrared light and the light entering the color image pixels 124 mainly includes visible light, so that the image sensor 100 can obtain iris image signals from the iris identification pixels 122 and color image signals from the color image pixels 124; or the image sensor 100 can obtain color image signals from the color image pixels 124 and the iris identification pixels 122 together, and then the image sensor 100 can realize both iris image acquisition and color image acquisition, thereby avoiding the need for the iris image sensor and the color image sensor at the same time, not only reducing the cost of the electronic device, but also freeing up space for setting other functional units.
The image sensor 100 of the embodiment of the invention also has the following beneficial effects: the infrared filter regions 222 and the color filter regions 224 in each filter unit 22 are alternately disposed at intervals, that is, the infrared filter regions 222 and the color filter regions 224 are close to each other, so that the control circuit 30 is used to subtract the color pixel values from the adjacent infrared pixel values to obtain the actual pixel values of the color image pixels of the more accurate color image.
In some embodiments, the filter unit 22 of the above embodiments may be such that the filter unit 22 covers 4 × 2 photosensitive pixels 12. Specifically, each of the filter units 22 includes 2 infrared filter regions 222 and 2 color filter regions 224, and the infrared filter regions 222 and the color filter regions 224 are alternately disposed. Each of the infrared filter regions 222 includes 1 × 2 infrared filter subunits 2222, and each of the color filter regions 224 includes 1 × 2 color filter subunits 2241. That is, each of the filter units 22 includes 2 × 2 color filter subunits 2241 arranged in an array and 2 × 2 infrared filter subunits 2222 arranged in an array. The color filter subunits 2241 and the infrared filter subunits 2222 in the same column are alternately arranged at intervals. Specifically, the first column of the filtering unit 22 may be a red filtering subunit 2246, an infrared filtering subunit 2222, a green filtering subunit 2242 and an infrared filtering subunit 2222, respectively, and the second column of the filtering unit 22 may be a green filtering subunit 2242, an infrared filtering subunit 2222, a blue filtering subunit 2244 and an infrared filtering subunit 2222, respectively.
Referring to fig. 6, in some embodiments, the structure of the filter unit 22 of the above embodiments may be replaced with: the filter unit 22 includes an infrared filter area 222 and two color filter areas 224, and the infrared filter area 222 in each filter unit 22 is disposed between the two color filter areas 224 or on one side. Each filter unit 22 covers 2 × 3 photosensitive pixels 12, and specifically, each filter unit 22 includes 1 infrared filter region 222 and 2 color filter regions 224. Each infrared filter region 222 includes 2 × 1 color filter subunits 2241, and each infrared filter region 222 includes 2 × 1 infrared filter subunits 2222.
In the image sensor 100 provided in this embodiment, a red color filter subunit 2222 is disposed near each color filter subunit 2241, so that the pixel value (color pixel value) of each photosensitive pixel 12 covered by the color filter subunit 2241 can be compensated by the pixel value (infrared pixel value) of the photosensitive pixel 12 covered by the infrared filter subunit 2222, so as to obtain a final accurate actual pixel value, thereby improving the imaging quality.
Specifically, when the infrared filter area 222 of each filter unit 22 is disposed between the two color filter areas 224, the first row of the filter units 22 can be a red filter subunit 2246, an infrared filter subunit 2222 and a green filter subunit 2242, respectively, and the second row of the filter units 22 can be a green filter subunit 2242, an infrared filter subunit 2222 and a blue filter subunit 2244, respectively.
When the infrared filter area 222 of each filter unit 22 is disposed at one side of the two color filter areas 224, the first row of the filter unit 22 can be respectively a red filter subunit 2246, a green filter subunit 2242 and an infrared filter subunit 2222, and the second row of the filter unit 22 can be respectively a green filter subunit 2242, a blue filter subunit 2244 and an infrared filter subunit 2222; or, the first row of the filtering unit 22 may be the infrared filtering subunit 2222, the red filtering subunit 2246, and the green filtering subunit 2242, respectively, and the second row of the filtering unit 22 may be the infrared filtering subunit 2222, the green filtering subunit 2242, and the blue filtering subunit 2244, respectively.
In the image sensor 100 provided in this embodiment, each two color filter subunits 2241 share one red filter subunit 2222, so that the color pixel values of the photosensitive pixels 12 are compensated by the infrared pixel values to obtain final accurate actual pixel values, and the imaging quality is improved while the spaces of the pixel unit array 10 and the filter unit array 20 are saved.
Referring to fig. 7, in some embodiments, the filter unit array 20 is a bayer array. The filter unit 22 may include 2 × 2 filter block units 221. Each filter block unit 221 includes 2 ir filter regions 222 and 2 color filter regions 224, and the ir filter regions 222 and the color filter regions 224 are alternately arranged, each color filter region 224 includes 2 × 1 color filter subunits 2241, and each ir filter region 222 includes 2 × 1 ir filter subunits 2222.
The 2 × 2 filter block units 221 are bayer array. Specifically, the filtering unit 22 covers 4 × 8 photosensitive pixels 12, the first row of the filtering unit 22 may be a red filtering subunit 2246, an infrared filtering subunit 2222, a green filtering subunit 2242, and an infrared filtering subunit 2222, respectively, the second row of the filtering unit 22 may be a red filtering subunit 2246, an infrared filtering subunit 2222, a green filtering subunit 2242, and an infrared filtering subunit 2222, respectively, the third row of the filtering unit 22 may be a green filtering subunit 2242, an infrared filtering subunit 2222, a blue filtering subunit 2244, an infrared filtering subunit 2222, a green filtering subunit 2222222222, respectively, The blue filter subunit 2244, the infrared filter subunit 2222, and the fourth row of the filter unit 22 may be a green filter subunit 2242, an infrared filter subunit 2222, a blue filter subunit 2244, and an infrared filter subunit 2222, respectively.
Referring to fig. 3, in some embodiments, the electronic device 300 of the above embodiments further includes a central processing unit 304 and a memory 305 connected to the camera module 301. The central processor 304 is used for controlling the external memory 305 to store the color image or/and the iris image. In this way, the image signal collected by the image sensor 100 can be saved in the memory 305 of the electronic device 300. The memory 305 may be an internal memory or an external memory.
Referring to fig. 3, in some embodiments, the electronic device 300 of the above embodiments further includes a central processing unit 304 and a display device 306 connected to the camera module 301. The central processor 304 is used for controlling the display device 306 to display the color image or/and the iris image. The display device 306 includes an OLED display screen and an LED display screen. In this way, the image signal acquired by the image sensor 100 can be displayed on the display device 306.
Specifically, the embodiments of the present invention may satisfy only one of the above embodiments or a plurality of the above embodiments at the same time, that is, embodiments in which one or more of the above embodiments are combined also belong to the scope of the embodiments of the present invention.
In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.
Claims (8)
1. An image sensor is used for realizing iris image acquisition and color image acquisition; it is characterized by comprising:
a photosensitive pixel array including a plurality of photosensitive pixels;
the light filtering unit array covers the light sensing pixel array, the light filtering unit array comprises a plurality of light filtering units, each light filtering unit comprises an infrared light filtering area and a color light filtering area, the light sensing pixels covered by the infrared light filtering areas form iris identification pixels, the iris identification pixels can receive infrared light and generate iris image signals, and the light sensing pixels covered by the color light filtering areas form color image pixels; and
a control circuit for controlling the operation of the electronic device,
the control circuit is used for controlling the iris identification pixels to acquire iris image signals and controlling the color image pixels to acquire color image signals; or
The control circuit is used for controlling the iris identification pixels to acquire iris image signals and controlling the color image pixels and the iris identification pixels to acquire color image signals together;
each filtering unit comprises two infrared filtering regions and two color filtering regions, and the infrared filtering regions and the color filtering regions in each filtering unit are alternately arranged at intervals; or
Each filtering unit comprises one infrared filtering area and two color filtering areas, and the infrared filtering area in each filtering unit is arranged between the two color filtering areas or on one side.
2. The image sensor of claim 1, wherein the outputs of the photosensitive pixels covered by the color filter regions correspond to color pixel values; the output of the photosensitive pixel covered by the infrared filter area corresponds to an infrared pixel value;
when the control circuit controls the color image pixels and the iris identification pixels to jointly acquire color image signals, the control circuit is used for subtracting the adjacent infrared pixel values from the color pixel values to obtain actual pixel values of all the color image pixels of the color image.
3. The image sensor of claim 1, wherein the infrared filter regions form an array arrangement.
4. The image sensor of claim 1, wherein the array of filter cells is a bayer array.
5. A camera module, comprising:
the image sensor of any one of claims 1 to 4; and
and the image processor is connected with the control circuit and is used for processing the iris image signal to obtain an iris image and processing the color image signal to obtain a color image.
6. An electronic device, comprising:
a body; and
the camera module of claim 5, the camera module being disposed on the body, the camera module further comprising a lens module, the image sensor being opposite the lens module.
7. The electronic device according to claim 6, wherein the electronic device comprises a central processing unit and a memory connected to the camera module, the central processing unit is configured to control the memory to store the color image or/and the iris image.
8. The electronic device according to claim 7, further comprising a central processing unit connected to the camera module and a display device, wherein the central processing unit is configured to control the display device to display the color image or/and the iris image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710524875.5A CN107346089B (en) | 2017-06-30 | 2017-06-30 | Image sensor, camera module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710524875.5A CN107346089B (en) | 2017-06-30 | 2017-06-30 | Image sensor, camera module and electronic device |
Publications (2)
| Publication Number | Publication Date |
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| CN107346089A CN107346089A (en) | 2017-11-14 |
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| CN107809601A (en) * | 2017-11-24 | 2018-03-16 | 深圳先牛信息技术有限公司 | Imaging sensor |
| CN108171126B (en) * | 2017-12-13 | 2022-11-15 | 深圳市欢太科技有限公司 | Electronic device with a detachable cover |
| CN109920341A (en) * | 2019-01-31 | 2019-06-21 | 山东晶泰星光电科技有限公司 | A kind of the LED display module and interactive mode LED display of interactive mode |
| CN110245627B (en) | 2019-06-19 | 2022-04-29 | 京东方科技集团股份有限公司 | Display panel and display device |
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