WO2023226395A1 - Capteur d'image, caméra et dispositif électronique - Google Patents

Capteur d'image, caméra et dispositif électronique Download PDF

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Publication number
WO2023226395A1
WO2023226395A1 PCT/CN2022/140320 CN2022140320W WO2023226395A1 WO 2023226395 A1 WO2023226395 A1 WO 2023226395A1 CN 2022140320 W CN2022140320 W CN 2022140320W WO 2023226395 A1 WO2023226395 A1 WO 2023226395A1
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WO
WIPO (PCT)
Prior art keywords
filter
camera
image sensor
array
infrared
Prior art date
Application number
PCT/CN2022/140320
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English (en)
Chinese (zh)
Inventor
王文涛
韦怡
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2023226395A1 publication Critical patent/WO2023226395A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of electronic devices, and in particular, to an image sensor, a camera and an electronic device.
  • mobile phone microscopy imaging technology is mainly based on Bayer color filter array (bayer CFA).
  • Bayer CFA Bayer color filter array
  • the filter array can only utilize signal light in the visible range, which will cause the incident light to The utilization rate is reduced, which in turn increases the system power consumption.
  • This application discloses an image sensor, a camera and an electronic device.
  • the image sensor provided by the embodiment of the present application includes a pixel array and a filter array.
  • the filter array includes a plurality of minimum repeating units, and the minimum repeating units include red filters, green filters, blue filters and near-infrared filters.
  • the camera provided by the embodiment of the present application includes a lens and the image sensor described in the above embodiment.
  • the lens is spaced apart from the image sensor and is used for imaging on the image sensor.
  • the electronic device provided by the embodiment of the present application includes the camera described in the above embodiment.
  • the amount of light entering the image sensor is increased by adding a near-infrared filter, thereby reducing the demand for the light source of the camera, thereby reducing the heat dissipation of the system power consumption.
  • near-infrared filters are added.
  • the acquisition of infrared light band data can also be used to guide and correct microscopic images, reducing artifacts and false colors in imaging and improving imaging quality.
  • Figure 1 is a schematic structural diagram of an image sensor according to an embodiment of the present application.
  • Figure 2 is a schematic diagram of the arrangement of the smallest repeating units of the filter array according to the embodiment of the present application;
  • Figure 3 is a microscopic observation picture and a color chart of the original RGB image of the image sensor in the related art
  • Figure 4 is a pattern of the image sensor 24 color card and a near-infrared microscopic collection pattern according to the embodiment of the present application;
  • Figure 5 is a schematic diagram of the simulation results of microscopic imaging results in the embodiment of the present application.
  • Figure 6 is another schematic diagram of the arrangement of the smallest repeating units of the filter array according to the embodiment of the present application.
  • Figure 7 is another structural schematic diagram of an image sensor according to an embodiment of the present application.
  • Figure 8 is an exploded schematic diagram of the camera according to the embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a fill light according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • Image sensor 10 pixel array 11, filter array 12, minimum repeating unit 121, red filter 1211, green filter 1212, blue filter 1213, near-infrared filter 1214, camera 100, lens 20, Fill light 30, lens 40, lens holder 50, flexible circuit board 60, board-to-board connector 70, electronic device 1000, casing 200.
  • the image sensor 10 provided by the embodiment of the present application includes a pixel array 11 and a filter array 12 .
  • the filter array 12 includes a plurality of minimum repeating units 121 , and the minimum repeating units 121 include a red filter 1211 , a green filter 1212 , a blue filter 1213 and a near-infrared filter 1214 .
  • the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 all transmit the same amount of light.
  • the areas of the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 are all equal.
  • each minimal repeating unit 121 is arranged in a 2*2 array, the green filter 1212 and the near-infrared filter 1214 are arranged diagonally, the red filter 1211 and the blue filter are arranged diagonally.
  • the pieces 1213 are arranged diagonally.
  • the number of red filters 1211, green filters 1212, blue filters 1213 and near-infrared filters 1214 each accounts for the number of filters in the filter array 12. 1/4 of the total number of pieces.
  • the red filter 1211, the green filter 1212, the blue filter 1213, and the near-infrared filter 1214 are each in a square shape.
  • the image sensor 10 may further include a microlens array 13 disposed on a side of the filter array 12 facing away from the pixel array 11 .
  • the camera 100 provided in the embodiment of the present application includes a lens 20 and the image sensor 10 described in the above embodiment.
  • the lens 20 is spaced apart from the image sensor 10 , and the lens 20 is used for imaging on the image sensor 10 .
  • the camera 100 may include a fill light 30, and the light emitted by the fill light 30 has a wavelength of 400 nm-1100 nm.
  • the camera 100 may also include a macro camera.
  • the electronic device 1000 provided in the embodiment of the present application includes the camera 100 described in the above embodiment.
  • the electronic device 1000 includes a casing 200 through which the camera 100 is exposed.
  • camera 100 is a rear camera.
  • electronic device 1000 includes a smartphone.
  • the image sensor 10 provided by the embodiment of the present application includes a pixel array 11 and a filter array 12 .
  • the filter array 12 includes a plurality of minimum repeating units 121 , and the minimum repeating units 121 include a red filter 1211 , a green filter 1212 , a blue filter 1213 and a near-infrared filter 1214 .
  • the camera includes an infrared filter.
  • the light guide pillar of the camera emits a uniform light source as fill light.
  • the light source reflected by the object enters the lens after passing through the cover glass.
  • the infrared filter filters the infrared light in the light source and transmits it to On the image sensor, the transmission spectrum is the visible light spectrum. This will reduce the utilization rate of incident light, thereby increasing system power consumption.
  • the image sensor 10 camera 100 and electronic device 1000 implemented in this application, by adding the near-infrared filter 1214 of the image sensor 10, the amount of light entering the image sensor 10 is increased, thereby reducing the demand for the light source 31 of the camera 100. To reduce the heat dissipation of system power consumption.
  • the acquisition of near-infrared light band data can also be used to guide and correct microscopic images, reducing artifacts and false colors in imaging and improving imaging quality.
  • the filter array 12 is mainly used to filter the incident light in separate channels, that is, to modulate the incident signal.
  • the incident light is modulated by the filter array 12 and then enters the pixel array 11 for photoelectric conversion and analog-to-digital conversion.
  • FIG. 3(a) is the microscopic observation picture of the original RGB image
  • Figure 3(b) is Color chart. It can be seen that there are different color channels depending on the composition of the filter array, an example is shown for an image sensor with a Bayer pattern.
  • the image sensor 10 since the near-infrared light band has no color information, the image sensor 10 according to the embodiment of the present application does not need interpolation when generating images.
  • a pattern of 24 color cards captured in the same state is shown in Figure 4(a).
  • the acquired pattern has no color information, and
  • Figure 4(a) is only an object intensity reflection map in the near-infrared band.
  • Figure 4(b) shows the near-infrared microscopic collection pattern in the same area. Each area represents the gray value of the object. Since the modulations are consistent, there will be no Bayer pattern as mentioned above, so there is no need for it. Interpolation processing.
  • the pattern in the near-infrared light band can accurately reflect the reflectivity of the object and the edge information of the shape, and can be revised and verified for subsequent demosaicing.
  • an image sensor with a filter array including only red filters, green filters, and blue filters and an image sensor including the near-infrared filter 1214 provided by the embodiment of the present application are respectively used.
  • Figure 5(a) is a real target object image
  • Figure 5(b) is an imaging pattern of the traditional image sensor 10 that only contains red filters, green filters, and blue filters
  • Figure 5(c) is the application The imaging pattern of the image sensor 10 provided by the embodiment. It can be seen in Figure 5(b) that due to the interpolation error of the edge texture caused by demosaic, obvious artifacts and false colors appear in the transition area.
  • the near-infrared filter 1214 of the image sensor 10 by adding the near-infrared filter 1214 of the image sensor 10 and then combining it with specific data processing algorithms and processes, the granularity of the flat areas in the image can be reduced, the signal-to-noise ratio can be improved, and the quality of imaging can be improved. At the same time, it can also reduce the heat dissipation of fill light power consumption and improve the shooting experience.
  • the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 all transmit the same amount of light. In this way, the color distribution of the imaged image can be uniform, ensuring the imaging effect of the image sensor 10 .
  • each minimum repeating unit 121 the areas of the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 are all equal. . In this way, the area of each filter is the same, which facilitates installation in the image sensor 10 and facilitates mass production to reduce production costs.
  • each minimum repeating unit 121 is arranged in a 2*2 array, the green filter 1212 and the near-infrared filter 1214 are arranged diagonally, and the red filter is arranged diagonally.
  • the light sheet 1211 and the blue filter 1213 are arranged diagonally.
  • the number of red filters 1211, green filters 1212, blue filters 1213 and near-infrared filters 1214 each account for the total number of filters in the filter array 12. 1/4 of the quantity.
  • each minimal repeating unit 121 is arranged in a 2*2 array, and the green filter 1212, the red filter 1211, the near-infrared filter 1214 and the blue filter in each minimal repeating unit 121
  • the optical filters 1213 can be arranged in a clockwise order to form a grid shape to form a minimum repeating unit 121 (as shown in FIG. 2 ).
  • Four minimum repeating units 121 are arrayed to form the filter array 12 .
  • each minimum repeating unit 121 may also be arranged in a 4*4 array, as shown in FIG. 6 . It should be noted that there can be multiple minimum repeating units 121 in the filter array 12 , and the multiple minimum repeating units 121 can also be arranged in other ways according to actual imaging requirements, which is not limited here.
  • the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 are all square. In this way, the structural arrangement of each minimum repeating unit 121 can be made more compact.
  • the red filter 1211, the green filter 1212, the blue filter 1213 and the near-infrared filter 1214 can also be in the shape of a circle, a regular hexagon or a regular octagon, etc., which are not used here. Make restrictions.
  • the image sensor 10 may further include a microlens array 13 , and the microlens array 13 is disposed on a side of the filter array 12 away from the pixel array 11 .
  • the microlens array 13 can converge the incident light, thereby improving the filling factor and quantum efficiency of the pixel.
  • the microlens array 13 includes a plurality of microlenses arranged in an array. Each microlens has positive refractive power to focus light on the pixel array 11 .
  • the surface of the microlens away from the filter array 12 may be convex, and the surface close to the filter array 12 may be flat, so that the microlens has positive refractive power.
  • the camera 100 provided by the embodiment of the present application includes a lens 20 and the image sensor 10 described in the above embodiment.
  • the lens 20 is spaced apart from the image sensor 10 , and the lens 20 is used for imaging on the image sensor 10 .
  • the camera 100 may include a fill light 30 , and the light emitted by the fill light 30 has a wavelength of 400 nm to 1100 nm.
  • the fill light 30 can emit light as fill light, and the spectrum has real photon signals from 400nm to 1100nm.
  • the light source 31 reflected by the object enters the macro camera 100 after passing through the lens 40, and then is transmitted to the image sensor 10.
  • the light source 31 may be a light emitting diode light source 31 (Light Emitting Diode, LED).
  • the light emitting diode light source 31 has the advantages of small size, long life, and high efficiency.
  • the light source 31 may also be a xenon lamp, which has relatively high energy density and illumination intensity.
  • the fill light 30 may be in an annular shape, and the light source 31 of the fill light 30 may be an annular surface light source 31 , and the light source 31 is configured to emit light in a direction away from the image sensor 10 .
  • the annular surface light source 31 can provide uniform illumination and improve imaging quality.
  • the fill light 30 is annular, and multiple sets of light sources 31 are spaced on the fill light 30 (as shown in FIG. 9 ), thereby reducing the manufacturing cost of the fill light 30 , wherein at least one set of light sources is 31 is configured to emit light in a direction away from the image sensor 10 .
  • the camera 100 may also include a macro camera.
  • the camera 100 provided by the embodiment of the present application includes the above image sensor 10, by adding the near-infrared filter 1214 of the image sensor 10, the acquisition of near-infrared light band data can also be used to guide and correct microscopic images. , reducing artifacts and false colors in imaging, improving imaging quality, and improving the experience when taking photos with the macro camera 100.
  • the camera 100 may also include a lens 40 , a lens holder 50 , a flexible circuit board 60 and a board-to-board connector 70 .
  • the lens 40 has the function of protecting the lens 20, effectively preventing external objects from intruding into the interior of the camera 100, and preventing external objects from damaging the lens 20 due to friction.
  • the lens 40 may be a glass cover plate, and the glass cover plate has better light transmission effect.
  • the flexible circuit board 60 Flexible Printed Circuit, FPC
  • the board to board connector 70 Board to board, BTB
  • the flexible circuit board 60 may be a flexible printed circuit board made of polyimide or polyester film as a base material.
  • the flexible printed circuit board has the advantages of light weight, thin thickness, and good bendability.
  • the board-to-board connector 70 has the advantage of strong transmission capability.
  • an electronic device 1000 provided by an embodiment of the present application includes a casing 200 and the camera 100 described in the above embodiment.
  • the camera 100 is exposed through the casing 200 .
  • the electronic device 1000 may be a terminal device with a camera function.
  • the electronic device 1000 may include a smartphone, a tablet computer, or other terminal equipment with a camera function.
  • the electronic device 1000 in the embodiment of the present application takes a smartphone as an example, which should not be understood as a limitation of the present application.
  • the casing 200 is an external component of the electronic device 1000 and plays a role in protecting the internal components of the electronic device 1000 .
  • the casing 200 may be a back cover of the electronic device 1000 , and the back cover covers components such as batteries of the electronic device 1000 .
  • the casing 200 can be made of metal material or plastic material, which is not limited here.
  • the casing 200 made of metal material has the advantage of being strong and durable, and the casing 200 made of plastic material can reduce the mass of the electronic device 1000 .
  • the camera 100 and the casing 200 may be detachably connected, or may be fixedly connected by welding, gluing, or other methods.
  • the camera 100 is rear-facing, or in other words, the camera 100 is disposed on the back of the electronic device 1000 so that the electronic device 1000 can perform rear-facing photography.
  • the camera 100 is disposed at the upper middle position of the casing 200 .
  • the camera 100 can be disposed at other positions such as the upper left position or the upper right position of the casing 200.
  • the position of the camera 100 disposed on the casing 200 is not limited to the example of this application.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)

Abstract

L'invention concerne un capteur d'image (10), une caméra (100) et un dispositif électronique (1000). Le capteur d'image (10) comprend un réseau de pixels (11) et un réseau de filtres (12). Le réseau de filtres (12) comprend une pluralité d'unités de répétition minimales (121), et chaque unité de répétition minimale (121) comprend un filtre rouge (1211), un filtre vert (1212), un filtre bleu (1213) et un filtre proche infrarouge (1214).
PCT/CN2022/140320 2022-05-25 2022-12-20 Capteur d'image, caméra et dispositif électronique WO2023226395A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210579762.6A CN115022562A (zh) 2022-05-25 2022-05-25 图像传感器、摄像头和电子装置
CN202210579762.6 2022-05-25

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WO2023226395A1 true WO2023226395A1 (fr) 2023-11-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115022562A (zh) * 2022-05-25 2022-09-06 Oppo广东移动通信有限公司 图像传感器、摄像头和电子装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212252A1 (de) * 2012-07-12 2014-01-16 Leica Microsystems (Schweiz) Ag Bildsensor und Kamera für ein Mikroskop
CN106878690A (zh) * 2015-12-14 2017-06-20 比亚迪股份有限公司 图像传感器的成像方法、成像装置和电子设备
CN106911919A (zh) * 2017-03-24 2017-06-30 陈兵 彩色图像传感器及彩色图像成像方法
CN112363180A (zh) * 2020-10-28 2021-02-12 Oppo广东移动通信有限公司 一种成像测距传感器、方法、系统及存储介质
CN213279832U (zh) * 2020-10-09 2021-05-25 Oppo广东移动通信有限公司 图像传感器、相机和终端
CN115022562A (zh) * 2022-05-25 2022-09-06 Oppo广东移动通信有限公司 图像传感器、摄像头和电子装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111756972A (zh) * 2020-05-15 2020-10-09 深圳市汇顶科技股份有限公司 图像传感器和电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212252A1 (de) * 2012-07-12 2014-01-16 Leica Microsystems (Schweiz) Ag Bildsensor und Kamera für ein Mikroskop
CN106878690A (zh) * 2015-12-14 2017-06-20 比亚迪股份有限公司 图像传感器的成像方法、成像装置和电子设备
CN106911919A (zh) * 2017-03-24 2017-06-30 陈兵 彩色图像传感器及彩色图像成像方法
CN213279832U (zh) * 2020-10-09 2021-05-25 Oppo广东移动通信有限公司 图像传感器、相机和终端
CN112363180A (zh) * 2020-10-28 2021-02-12 Oppo广东移动通信有限公司 一种成像测距传感器、方法、系统及存储介质
CN115022562A (zh) * 2022-05-25 2022-09-06 Oppo广东移动通信有限公司 图像传感器、摄像头和电子装置

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