CN118338147A - Image pickup method, image pickup module and electronic equipment - Google Patents

Image pickup method, image pickup module and electronic equipment Download PDF

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Publication number
CN118338147A
CN118338147A CN202310072693.4A CN202310072693A CN118338147A CN 118338147 A CN118338147 A CN 118338147A CN 202310072693 A CN202310072693 A CN 202310072693A CN 118338147 A CN118338147 A CN 118338147A
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China
Prior art keywords
color light
color
electrochromic filter
electrochromic
light
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CN202310072693.4A
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Chinese (zh)
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龙思琛
高屹东
张凯元
郭利德
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202310072693.4A priority Critical patent/CN118338147A/en
Publication of CN118338147A publication Critical patent/CN118338147A/en
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Abstract

Provided are an image pickup method, an image pickup module and electronic equipment. The image pickup module comprises an electrochromic filter group and a photosensitive element which are sequentially arranged from an object side to an image side along an optical axis, wherein the electrochromic filter group comprises at least two electrochromic filters, and each electrochromic filter can change a transmitted wave band according to the change of a driving electric signal so as to transmit one or two of first color light, second color light and third color light of three primary colors of light; the electrochromic filter group is capable of time-sharing transmitting the first color light, the second color light, and the third color light separately during an imaging period, so that the photosensitive element generates a first image from the first color light, generates a second image from the second color light, and generates a third image from the third color light, the first image, the second image, and the third image being used for a synthesis process to generate a target image. All pixels of the photosensitive element can directly obtain R/G/B three-color information by the electrochromic filter group of the camera module, so that the resolution is improved, and the color reduction degree is high.

Description

Image pickup method, image pickup module and electronic equipment
Technical Field
The present application relates to the field of imaging technologies, and in particular, to an imaging method, an imaging module, and an electronic device.
Background
With the continuous progress of mobile phone photography, users have higher requirements on photography, especially on color reduction and shooting scenes. Terminal devices that combine high performance with high color rendition are becoming increasingly popular in the marketplace.
The color rendition degree of current module of making a video recording is low, has pseudo-color scheduling problem, is unfavorable for promoting to shoot and experiences.
Disclosure of Invention
The embodiment of the application provides a photographing method, a photographing module and electronic equipment, wherein an electrochromic filter group of the photographing module enables all pixels of a photosensitive element to directly obtain R/G/B three-color information, the resolution is equivalent to the resolution of a full channel, and the resolution can be obviously improved; and the color is restored without interpolation estimation, so that the color restoration degree is higher, and the shooting experience is more real.
In a first aspect, an embodiment of the present application provides an image capturing module, where the image capturing module includes an electrochromic filter group and a photosensitive element sequentially arranged from an object side to an image side along an optical axis, the electrochromic filter group includes at least two electrochromic filters, each of which is capable of changing a transmitted wavelength band according to a change of a driving electrical signal, so as to transmit one or both of first color light, second color light, and third color light of three primary colors of light; in one imaging period, the electrochromic filter group can make the first color light, the second color light and the third color light independently penetrate in a time sharing mode, and then the photosensitive element generates a first image according to the first color light, generates a second image according to the second color light and generates a third image according to the third color light, and the first image, the second image and the third image are used for conducting synthesis processing to generate a target image.
According to the camera module provided by the embodiment of the application, each electrochromic filter can change the transmitted wave band according to the change of the driving electric signal so as to transmit one or two of the first color light, the second color light and the third color light of the three primary colors of light; the electrochromic filter group is capable of time-sharing transmission of the first color light, the second color light, and the third color light in one imaging period, so that the photosensitive element generates a first image from the first color light, generates a second image from the second color light, and generates a third image from the third color light, and the first image, the second image, and the third image are used for performing a synthesizing process to generate a target image. Therefore, all pixels of the photosensitive element can directly obtain R/G/B three-color information by the electrochromic filter group of the camera module, the resolution is equivalent to the resolution of a full channel, and the resolution can be obviously improved; the color restoration is not needed to be estimated through interpolation, the color restoration degree is higher, and the shooting experience is more real.
In one possible implementation, each of the electrochromic filters is capable of switching between transmitting two different wavelength bands and at least one wavelength band is capable of transmitting two of the first, second and third color light within one imaging period. That is, the electrochromic filters can transmit different light in different wavebands, so that after the different electrochromic filters are combined, the first color light, the second color light and the third color light can be independently transmitted through the electrochromic filter group in a time-sharing manner.
In one possible implementation, the electrochromic filter group includes: a first electrochromic filter for switching between a band through which the first color light is transmitted and a band through which the second color light and the third color light are transmitted; a second electrochromic filter for switching between a band in which the first color light and the second color light are transmitted and a band in which the third color light is transmitted; and, in a first state, the first electrochromic filter is transmissive to the first color light, the second electrochromic filter is transmissive to the first and second colors of light, and the set of electrochromic filters is transmissive to the first color of light; in a second state, the first electrochromic filter is transmissive to the second and third colors of light, the second electrochromic filter is transmissive to the first and second colors of light, and the set of electrochromic filters is transmissive to the second color of light; in a third state, the first electrochromic filter is transmissive to the second color light and the third color light, the second electrochromic filter is transmissive to the third color light, and the electrochromic filter set is transmissive to the third color light. That is, to achieve time-sharing such that the first, second, and third color lights are transmitted through the electrochromic filter group alone, the electrochromic filter group may include two electrochromic filters, each of which is capable of transmitting two wavelength bands, one of which is capable of transmitting one of the three primary colors of light, and the other of which is capable of transmitting the other two colors of light.
In one possible implementation, the electrochromic filter group includes: a third electrochromic filter for switching between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted; a fourth electrochromic filter for switching between a band in which the first color light and the third color light are transmitted and a band in which the second color light and the third color light are transmitted; and, in a first state, the third electrically-induced color filter is transmissive to the first color light and the second color light, the fourth electrically-induced color filter is transmissive to the first color light and the third color light, and the set of electrically-induced color filters is transmissive to the first color light; in a second state, the third electrochromic filter is transmissive to the first and second colors of light, the fourth electrochromic filter is transmissive to the second and third colors of light, and the set of electrochromic filters is transmissive to the second color of light; in a third state, the third electrochromic filter is transmissive to the second and third colors of light, the fourth electrochromic filter is transmissive to the first and third colors of light, and the set of electrochromic filters is transmissive to the third color of light. That is, in order to realize time division such that the first color light, the second color light, and the third color light are transmitted through the electrochromic filter group alone, the electrochromic filter group may include two electrochromic filters each capable of transmitting two wavelength bands each capable of transmitting two color lights among the three primary colors of light.
In one possible implementation, the electrochromic filter group includes: a fifth electrochromic filter for switching between a band in which the first color light and the second color light are transmitted and a band in which the third color light is transmitted; a sixth electro-active color filter for switching between a wavelength band transmitting the first color light and the third color light and a wavelength band transmitting the second color light; a seventh electrochromic filter for switching between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted; and, in a first state, the fifth electrically-induced color filter is capable of transmitting the first color light and the second color light, the sixth electrically-induced color filter is capable of transmitting the first color light and the third color light, the seventh electrically-induced color filter is capable of transmitting the first color light and the second color light, and the group of electrically-induced color filters is capable of transmitting the first color light; in a second state, the fifth electrically-induced color filter is capable of transmitting the first color light and the second color light, the sixth electrically-induced color filter is capable of transmitting the second color light, the seventh electrically-induced color filter is capable of transmitting the second color light and the third color light, and the group of electrically-induced color filters is capable of transmitting the second color light; in a third state, the fifth electrically-induced color filter is capable of transmitting the third color light, the sixth electrically-induced color filter is capable of transmitting the first color light and the third color light, the seventh electrically-induced color filter is capable of transmitting the second color light and the third color light, and the group of electrically-induced color filters is capable of transmitting the third color light. That is, to achieve time-sharing such that the first color light, the second color light, and the third color light are transmitted through the electrochromic filter group alone, the electrochromic filter group may include three electrochromic filters each capable of transmitting two wavelength bands, wherein one of the two wavelength bands of the two electrochromic filters is capable of transmitting one color light of the three primary colors and the other of the two wavelength bands is capable of transmitting the other two colors of light of the three primary colors; both wavelength bands of the third electro-luminescent filter are capable of transmitting two colors of light among the three primary colors of light.
In one possible implementation manner, the image capturing module further includes a control circuit, where the control circuit is connected to the at least two electrochromic filters respectively, and changes a transmission band of the corresponding electrochromic filter by controlling the driving electric signal; wherein: the drive electrical signal comprises a voltage signal comprising at least one of a pulsed electrical signal and a continuous electrical signal; alternatively, the driving electrical signal comprises a current signal comprising at least one of a pulsed electrical signal and a continuous electrical signal. That is, the driving electric signal for controlling the electro-color filter by the control circuit may be a voltage signal or a current signal; the voltage signal can be a pulse electric signal or a continuous electric signal; the current signal may be a pulsed electrical signal or a continuous electrical signal.
In one possible implementation manner, the image capturing module further includes a lens group, and the lens group is disposed along the optical axis relatively to the photosensitive element near the object side, where: the lens group comprises a first lens group and a second lens group, the first lens group comprises at least one lens, the second lens group comprises at least one lens, and the electrochromic filter group is arranged between the first lens group and the second lens group; and/or the lens group comprises at least one lens, and the electrochromic filter group is positioned at one of one side of the lens group close to the photosensitive element and the other side far from the photosensitive element. That is, the electrochromic filter group may be located in front of the imaging lens group, or between the two imaging lens groups, or between the imaging lens group and the photosensitive element.
In one possible implementation, half of the diagonal dimension of the imaging surface of the photosensitive element is IMH, and the effective focal length of the lens group is f, which satisfies: f/IMH >0.83. This ensures that the lens assembly matches the electrochromic filter assembly.
In one possible implementation, a first one of the first, second, and third color light is red light, the wavelength of the red light ranging from 580nm to 700nm; the second of the first, second and third color light is green light, and the wavelength range of the green light is 500-580 nm; and a third one of the first color light, the second color light and the third color light is blue light, and the wavelength range of the blue light is 400-500 nm.
In a second aspect, an embodiment of the present application provides an electronic device, including the camera module provided in the first aspect.
In a third aspect, an embodiment of the present application provides an imaging method, including: allowing the first color light, the second color light and the third color light in the three primary colors of light to be transmitted independently through the electrochromic filter component in one imaging period; wherein the electrochromic filter group includes at least two electrochromic filters, each of which is capable of changing a transmitted wavelength band according to a change in a driving electric signal so as to transmit one or both of the first color light, the second color light, and the third color light; generating a first image by using a photosensitive element according to the first color light, generating a second image by using the second color light, and generating a third image by using the third color light, wherein the electrochromic filter group and the photosensitive element are sequentially arranged from an object side to an image side along an optical axis; and synthesizing the first image, the second image and the third image to generate a target image.
In the image pickup method of the embodiment of the application, the electrochromic filter group enables all pixels of the photosensitive element to directly obtain R/G/B three-color information, the resolution is equivalent to the full channel resolution, and the resolution of a target image can be obviously improved; and the color is restored without interpolation estimation, so that the color restoration degree is higher, and the shooting experience is more real.
In one possible implementation, each of the electrochromic filters is capable of switching between transmitting two different wavelength bands and at least one wavelength band is capable of transmitting two of the first, second and third color light within one imaging period.
In one possible implementation, the set of electrochromic filters includes a first electrochromic filter for switching between a band of wavelengths that is transparent to the first color light and a band of wavelengths that is transparent to the second color light and the third color light, and a second electrochromic filter for switching between a band of wavelengths that is transparent to the first color light and the second color light and a band of wavelengths that is transparent to the third color light; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps: in a first state, transmitting the first color light through the first electrochromic filter and transmitting the first color light and the second color light through the second electrochromic filter so as to transmit the first color light through the electrochromic filter group; in a second state, transmitting the first electrochromic filter through the second color light and the third color light, and transmitting the second electrochromic filter through the first color light and the second color light, so that the electrochromic filter group transmits the second color light; in a third state, the first electrochromic filter is made to transmit the second color light and the third color light, and the second electrochromic filter is made to transmit the third color light, so that the electrochromic filter group is made to transmit the third color light.
In one possible implementation, the set of electrochromic filters includes a third electrochromic filter for switching between a band of wavelengths that is transparent to the first and second colors of light and a band of wavelengths that is transparent to the second and third colors of light; the fourth electrochromic filter is configured to switch between a band in which the first color light and the third color light are transmitted and a band in which the second color light and the third color light are transmitted; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps: in a first state, transmitting the third electrochromic filter through the first color light and the second color light, and transmitting the fourth electrochromic filter through the first color light and the third color light, so that the electrochromic filter group transmits the first color light; in a second state, transmitting the third electrochromic filter through the first color light and the second color light, and transmitting the fourth electrochromic filter through the second color light and the third color light, so that the electrochromic filter group transmits the second color light; in a third state, the third electrochromic filter is made to transmit the second color light and the third color light, and the fourth electrochromic filter is made to transmit the first color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
In one possible implementation, the set of electrochromic filters includes a fifth electrochromic filter for switching between a band of wavelengths that is transparent to the first and second colors of light and a band of wavelengths that is transparent to the third color of light, a sixth electrochromic filter, and a seventh electrochromic filter; the sixth electrochromic filter is configured to switch between a band that transmits the first color light and the third color light and a band that transmits the second color light; the seventh electrochromic filter is configured to switch between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps: in a first state, transmitting the fifth electrochromic filter through the first color light and the second color light, transmitting the sixth electrochromic filter through the first color light and the third color light, and transmitting the seventh electrochromic filter through the first color light and the second color light, so that the electrochromic filter group transmits the first color light; in a second state, transmitting the fifth electrochromic filter through the first color light and the second color light, transmitting the sixth electrochromic filter through the second color light, and transmitting the seventh electrochromic filter through the second color light and the third color light, so that the electrochromic filter group transmits the second color light; in a third state, the fifth electrochromic filter is made to transmit the third color light, the sixth electrochromic filter is made to transmit the first color light and the third color light, and the seventh electrochromic filter is made to transmit the second color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
In one possible implementation manner, the image capturing method further includes: disposing a lens group along an optical axis in proximity to the object side with respect to the photosensitive element, wherein: the lens group comprises a first lens group and a second lens group, the first lens group comprises at least one lens, the second lens group comprises at least one lens, and the electrochromic filter group is arranged between the first lens group and the second lens group; and/or the lens group comprises at least one lens, and the electrochromic filter group is positioned at one of one side of the lens group close to the photosensitive element and the other side far from the photosensitive element.
In one possible implementation, half of the diagonal dimension of the imaging surface of the photosensitive element is IMH, and the effective focal length of the lens group is f, which satisfies: f/IMH >0.83.
In one possible implementation, a first one of the first, second, and third color light is red light, the wavelength of the red light ranging from 580nm to 700nm; the second of the first, second and third color light is green light, and the wavelength range of the green light is 500-580 nm; and a third one of the first color light, the second color light and the third color light is blue light, and the wavelength range of the blue light is 400-500 nm.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The drawings that accompany the detailed description can be briefly described as follows.
Fig. 1 is a schematic structural diagram of a camera module provided in an embodiment of the application;
FIG. 2 is a schematic illustration of an exemplary embodiment of the camera module shown in FIG. 1;
FIG. 3 is an exemplary schematic diagram of a variation of the camera module shown in FIG. 2;
FIG. 4 is an exemplary schematic diagram of another variation of the camera module shown in FIG. 2;
fig. 5 is a flowchart of an image capturing method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
In the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or by an interference or integral connection; the specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
In order to realize color images, it is often necessary to directly obtain or indirectly obtain the R/G/B three primary color information of the object. The prior art generally requires the use of bayer filters, which are a mosaic color filter array formed by arranging RGB filters having periodicity over the photosensitive element pixels. For example, currently most bayer filters use an RGGB periodic arrangement, with 50% of the array being G channels, 25% being R channels, and 25% being B channels. The light is transmitted through the Bayer color filter and is incident to the photosensitive element, each pixel on the photosensitive element can only directly obtain one color information in the three-primary color light, the other two color information is needed to be obtained through interpolation of adjacent pixels, and then the directly obtained real one color information and the estimated two color information obtained through interpolation are used for color restoration.
Because partial color information is required to be obtained through adjacent pixel interpolation when the Bayer color filter is used for color restoration, full channel resolution cannot be obtained, namely, the resolution of each color channel is lower than that of each color channel when the Bayer color filter is not used, so that shooting resolution is reduced, shooting color restoration is inaccurate, and shooting experience is affected.
In view of this, the embodiment of the application provides a photographing method, a photographing module and an electronic device, wherein the electrochromic filter group of the photographing module enables all pixels of the photosensitive element to directly obtain R/G/B three-color information, the resolution is equivalent to the resolution of a full channel, and the resolution can be obviously improved; and the color is restored without interpolation estimation, so that the color restoration degree is higher, and the shooting experience is more real. In addition, the camera module of the embodiment of the application can be installed in electronic equipment such as an intelligent terminal and the like, and can be used for shooting and recording images, such as scenes of taking external videos and photos by adopting lenses of portable electronic products such as intelligent mobile phones, notebook computers, tablet computers, wearable equipment and the like.
Fig. 1 is a schematic structural diagram of a camera module provided in an embodiment of the application. As shown in fig. 1, the image pickup module includes an electrochromic filter group 1 and a photosensitive element 2 arranged in this order from an object side to an image side along an optical axis. The photosensitive element 2 is used for sensing light to form an image. The electrochromic filter group 1 includes at least two electrochromic filters 11, that is, the electrochromic filter group 1 includes two or more electrochromic filters 11, each of which 11 is capable of changing a transmitted wavelength band according to a change of a driving electric signal so as to transmit one or both of the first, second and third color lights of the trichromatic light.
In one imaging period, the electrochromic filter group 1 can transmit the first color light, the second color light and the third color light separately in a time sharing manner, so that the photosensitive element 2 generates a first image from the first color light, generates a second image from the second color light and generates a third image from the third color light, and the first image, the second image and the third image are used for performing a synthesizing process to generate a target image. That is, the transmission wavelength band of each of the electrochromic filters 11 can be changed by changing the driving electric signal, and thus the transmission wavelength band of the electrochromic filter group 1 can be changed. The photosensitive element 2 sequentially images different transmission bands of the electrochromic filter group 1, and the obtained imaging information of each transmission band is used for image processing and synthesis.
In addition, the first one of the first color light, the second color light and the third color light is red light, and the wavelength range of the red light is 580nm-700nm; the second of the first, second and third color light is green light, the wavelength of which ranges from 500nm to 580nm; the third one of the first, second and third color light is blue light with a wavelength range of 400nm-500nm.
For example, first, the driving electric signal is controlled to realize that the electrochromic filter group 1 transmits green light, and the photosensitive element 2 obtains imaging information of the green light; then switching the driving electric signals to realize that the electrochromic filter group 1 transmits blue light, and the photosensitive element 2 obtains imaging information of the blue light; then, switching the driving electric signals to realize that the electrocolor filter group 1 transmits red light, and the photosensitive element 2 obtains imaging information of the red light; finally, the imaging information of red light, blue light and green light obtained by the photosensitive element 2 realizes true color photographing through multi-frame fusion.
Also, each of the electrochromic filters 11 can be switched between transmitting two different wavelength bands within one imaging period, and at least one wavelength band can transmit two of the first color light, the second color light, and the third color light. The camera module may further include a control circuit (not shown) connected to at least two electrochromic filters 11, respectively, and changing the transmission band of the corresponding electrochromic filters 11 by controlling the driving electric signal. In some examples, the drive electrical signal comprises a voltage signal comprising at least one of a pulsed electrical signal and a continuous electrical signal. In other examples, the drive electrical signal includes a current signal; the current signal comprises at least one of a pulsed electrical signal and a continuous electrical signal.
With continued reference to fig. 1, the camera module may further include a lens group 3, where the lens group 3 is used for converging light beam imaging. The lens group 3 is disposed along the optical axis near the object side of the photosensitive element 2, and the electrochromic filter group 1 may be located in front of the imaging lens, i.e., the lens group 3, or may be located between the lens group 3 and the photosensitive element 2, or may be located between two lens groups, i.e., inside the lens group 3. In fig. 1, the electrochromic filter group 1 is located in front of the lens group 3, i.e., the electrochromic filter group 1, the lens group 3, and the photosensitive element 2 are arranged in order from the object side to the image side along the optical axis.
Further, in order to match the lens group 3 with the electrochromic filter group 1, half of the diagonal dimension of the imaging surface of the photosensitive element 2 is IMH, that is, IMH is the maximum half image height of the photosensitive element, and the effective focal length of the lens group 3 is f, which satisfies the following conditions: f/IMH >0.83. In some examples, the lens group 3 satisfies the following relationship: 21.63 Xf/IMH >18.
According to the camera module provided by the embodiment of the application, each electrochromic filter can change the transmitted wave band according to the change of the driving electric signal so as to transmit one or two of the first color light, the second color light and the third color light of the three primary colors of light; the electrochromic filter group is time-divisionally permeable to the first color light, the second color light, and the third color light in one imaging period, so that the photosensitive element generates a first image from the first color light, generates a second image from the second color light, and generates a third image from the third color light, the first image, the second image, and the third image being used for a synthesizing process to generate a target image. Therefore, all pixels of the photosensitive element can directly obtain R/G/B three-color information by the electrochromic filter group of the camera module, the resolution is equivalent to the resolution of a full channel, and the resolution can be obviously improved; and the color is restored without interpolation estimation, so that the color restoration degree is higher, and the shooting experience is more real.
Three specific structures of the camera module according to the embodiment of the present application are described below with reference to fig. 2 to 4.
Fig. 2 is a schematic diagram showing an exemplary specific structure of the image capturing module shown in fig. 1, and as shown in fig. 2, the image capturing module includes an electrochromic filter group 1, a lens group 3, and a photosensitive element 2 sequentially arranged from an object side to an image side along an optical axis, that is, the electrochromic filter group 1 is located in front of the imaging lens group 3 along the optical axis, or the electrochromic filter group 1 is located at the other side of the lens group 3 away from the photosensitive element 2. The lens group 3 includes at least one lens T. The electrochromic filter group 1 includes a first electrochromic filter 11a and a second electrochromic filter 11b. The arrangement order of the first and second electrochromic filters 11a and 11b along the optical axis may be changed, for example, the first electrochromic filter 11a is located at the object side with respect to the second electrochromic filter 11 b; or the first electro-chromic 11a is closer to the image side than the second electro-chromic 11b.
Wherein the first electrochromic filter 11a is operable to switch between a band of wavelengths that is transparent to light of the first color and a band of wavelengths that is transparent to light of the second and third colors. The second electrochromic filter 11b is operable to switch between a band that transmits the first color light and the second color light and a band that transmits the third color light.
In the first state, the first color filter 11a transmits the first color light, the second color filter 11b transmits the first color light and the second color light, and the color filter group 1 transmits the first color light; in the second state, the first electrochromic filter 11a is capable of transmitting the second color light and the third color light, the second electrochromic filter 11b is capable of transmitting the first color light and the second color light, and the electrochromic filter group 1 is capable of transmitting the second color light; in the third state, the first electrochromic filter 11a is capable of transmitting the second color light and the third color light, the second electrochromic filter 11b is capable of transmitting the third color light, and the electrochromic filter group 1 is capable of transmitting the third color light.
That is, each electrochromic filter has two transmission bands, one transmission band being one of the three colors of RGB (e.g., R or G or B) and the other transmission band being the other two of the three colors of RGB. Taking the first color light as red light, the second color light as green light, the third color light as blue light as an example, and taking R as red light, G as green light, and B as blue light, the first state, the second state and the third state of the electrochromic filter group are shown in the following table 1. Table 1 is a table of the combination of transmission bands of each electrochromic filter when the electrochromic filter group of the camera module realizes RGB transmission.
First state Second state Third state
Electrochromic filter 11a R G+B G+B
Electrochromic filter 11b G+R G+R B
Electroluminescence filter group R G B
TABLE 1
As shown in table 1, the electrochromic filter group 1 includes two electrochromic filters 11, that is, an electrochromic filter 11a and an electrochromic filter 11b, each of the electrochromic filters 11 has two different transmission bands, and the different transmission bands of the electrochromic filters are switched by changing the driving electric signal. Wherein g+b represents green light and blue light; g+r represents green and red light.
Specifically, the two transmission bands of the electrochromic filter 11a may be R and g+b, respectively, i.e., one of the two transmission bands may transmit R through the electrochromic filter 11a and the other of the two transmission bands may transmit G and B through the electrochromic filter 11a. The two transmission bands of the electrochromic filter 11B may be B and g+r, respectively, i.e., one of the two transmission bands may transmit B through the electrochromic filter 11B and the other of the two transmission bands may transmit both G and R through the electrochromic filter 11B.
Thus, in the first state of the electrochromic filter group 1: changing the driving electric signal, controlling the permeation wave band of the electrochromic filter 11a to be an R channel, and controlling the permeation wave band of the electrochromic filter 11b to be a G+R channel, wherein the permeation wave band of the electrochromic filter group is the R channel; in a second state of the electrochromic filter group: changing the driving electric signal, controlling the permeation wave band of the electrochromic filter 11a to be a G+B channel, and controlling the permeation wave band of the electrochromic filter 11B to be a G+R channel, wherein the permeation wave band of the electrochromic filter group is a G channel; in a third state of the electrochromic filter group: the driving electric signal is changed to control the transmission wave band of the electrochromic filter 11a to be G+B channel, and the transmission wave band of the electrochromic filter 11B to be B channel, and at this time, the transmission wave band of the electrochromic filter group is B channel.
That is, in order to realize true color photographing, the photosensitive element needs to obtain information of the subject R channel, G channel, and B channel. Therefore, in one imaging period, the switching of the electrochromic filter group in the three states needs to be realized by adjusting the driving electric signal. In addition, in order to reduce the influence of the movement of the subject on the photographing during the switching time of the different transmission bands of the electrochromic filter, and in order to ensure the smoothness of the video photographing, it is required that the switching time t of each band of the electrochromic filter is sufficiently fast, for example, t <20ms.
In addition, in the imaging period, the switching sequence of the three states of the electrochromic filter group is not limited, for example, the electrochromic filter group can be sequentially controlled to be in a third state, a second state and a first state, and correspondingly, light rays of the B channel, the G channel and the R channel are sequentially allowed to pass through the electrochromic filter group and enter the photosensitive element. The photosensitive element images in turn for three transmission bands of the electrochromic filter group, and the obtained monochromatic imaging information of each band is used for image processing and synthesis. Therefore, all pixels of the photosensitive element can directly obtain imaging information of the R channel, the G channel and the B channel without interpolation of adjacent pixels, and the scheme improves the color reduction degree and the imaging resolution of shooting.
Fig. 3 is an exemplary structural diagram of a modification of the camera module shown in fig. 2. As shown in fig. 3, the image capturing module includes a lens group 3, an electrochromic filter group 1, and a photosensitive element 2 arranged in this order from the object side to the image side in the optical axis direction, that is, in the optical axis direction, the electrochromic filter group 1 is located between the imaging lens group 3 and the photosensitive element 2, or, the electrochromic filter group 1 is located on the side of the lens group 3 close to the photosensitive element 2. The lens group 3 includes at least one lens T. The electrochromic filter group 1 includes a third electrochromic filter 11c and a fourth electrochromic filter 11d, and the arrangement order of the third electrochromic filter 11c and the fourth electrochromic filter 11d along the optical axis may be changed, for example, the third electrochromic filter 11c is close to the object side with respect to the fourth electrochromic filter 11 d; or the third electro-chromic 11c is closer to the image side than the fourth electro-chromic 11 d.
Wherein the third electrochromic filter 11c is operable to switch between a band of wavelengths that is transparent to the first and second colors of light and a band of wavelengths that is transparent to the second and third colors of light. The fourth electrochromic filter 11d is operable to switch between a band in which the first color light and the third color light are transmitted and a band in which the second color light and the third color light are transmitted.
In the first state, the third electrochromic filter 11c is capable of transmitting the first color light and the second color light, the fourth electrochromic filter 11d is capable of transmitting the first color light and the third color light, and the electrochromic filter group 1 is capable of transmitting the first color light; in the second state, the third electro-chromic 11c is capable of transmitting the first color light and the second color light, the fourth electro-chromic 11d is capable of transmitting the second color light and the third color light, and the electro-chromic set 1 is capable of transmitting the second color light; in the third state, the third electrochromic filter 11c is capable of transmitting the second color light and the third color light, the fourth electrochromic filter 11d is capable of transmitting the first color light and the third color light, and the electrochromic filter group 1 is capable of transmitting the third color light.
That is, each electrochromic filter has two transmission bands, and each transmission band transmits two colors of light among the three primary colors of RGB. Taking the first color light as red light, the second color light as green light, the third color light as blue light as an example, and taking R as red light, G as green light, and B as blue light, the first state, the second state and the third state of the electrochromic filter group are shown in the following table 2. Table 2 is a table of the combination of transmission bands of each electrochromic filter when the group of electrochromic filters achieve RGB transmission.
First state Second state Third state
Electrochromic filter 11c R+G R+G G+B
Electrochromic filter 11d R+B G+B R+B
Electroluminescence filter group R G B
TABLE 2
As shown in table 2, the electrochromic filter group 1 includes an electrochromic filter 11c and an electrochromic filter 11d each having two different transmission bands, the different transmission bands of the electrochromic filter 11 being switched by changing the driving electric signal. Wherein r+g represents red light and green light; g+b represents green light and blue light; r+b represents red light and blue light.
Specifically, the two transmission bands of the electrochromic filter 11c are r+g and g+b, respectively, that is, one of the two transmission bands allows both the R channel and the G channel to transmit through the electrochromic filter 11c, and the other of the two transmission bands allows both the G channel and the B channel to transmit through the electrochromic filter 11c. The two transmission bands of the electrochromic filter 11d are g+b and r+b, respectively, i.e., one of the two transmission bands allows both the G channel and the B channel to transmit through the electrochromic filter 11d, and the other of the two transmission bands allows both the R channel and the B channel to transmit through the electrochromic filter 11d.
Thus, in the first state of the electrochromic filter group 1: changing the driving electric signal, controlling the permeation wave band of the electrochromic filter 11c to be an R+G channel, and controlling the permeation wave band of the electrochromic filter 11d to be an R+B channel, wherein the permeation wave band of the electrochromic filter group 1 is an R channel; in the second state of the electrochromic filter group 1: changing the driving electric signal, controlling the permeation wave band of the electrochromic filter 11c to be an R+G channel, and controlling the permeation wave band of the electrochromic filter 11d to be a G+B channel, wherein the permeation wave band of the electrochromic filter group 1 is a G channel; in the third state of the electrochromic filter group 1: the driving electric signal is changed to control the permeation wave band of the electrochromic filter 11c to be G+B channel, and the permeation wave band of the electrochromic filter 11d to be R+B channel, and at this time, the permeation wave band of the electrochromic filter group 1 is B channel.
That is, in order to realize true color photographing, the photosensitive element needs to obtain information of the subject R channel, G channel, and B channel. Therefore, in one imaging period, the switching of the electrochromic filter group in the three states needs to be realized by adjusting the driving electric signal. In addition, in order to reduce the influence of the movement of the subject on the photographing during the switching time of the different transmission bands of the electrochromic filter, and in order to ensure the smoothness of the video photographing, it is required that the switching time t of each band of the electrochromic filter is sufficiently fast, for example, t <20ms.
In addition, in the imaging period, the switching sequence of the three states of the electrochromic filter group is not limited, for example, the electrochromic filter group can be sequentially controlled to be in the second state, the third state and the first state, and correspondingly, the light rays of the G channel, the B channel and the R channel are sequentially allowed to pass through the electrochromic filter group and enter the photosensitive element. The photosensitive element images in turn for three transmission bands of the electrochromic filter group, and the obtained monochromatic imaging information of each band is used for image processing and synthesis. Therefore, all pixels of the photosensitive element can directly obtain imaging information of the R channel, the G channel and the B channel without interpolation of adjacent pixels, and the scheme improves the color reduction degree and the imaging resolution of shooting.
Fig. 4 is an exemplary structural diagram of another modification of the camera module shown in fig. 2. As shown in fig. 4, the lens group 3 includes a first lens group 31 and a second lens group 32, the first lens group 31 includes at least one lens T, the second lens group 32 includes at least one lens T, and the electrochromic filter group 1 is provided between the first lens group 31 and the second lens group 32. That is, the image capturing module includes a first lens group 31, an electrochromic filter group 1, a second lens group 32, and a photosensitive element 2, which are arranged in this order from the object side to the image side in the optical axis direction. The electrochromic filter group 1 includes a fifth electrochromic filter 11e, a sixth electrochromic filter 11f, and a seventh electrochromic filter 11g. The arrangement order of the fifth electro-chromic 11e, the sixth electro-chromic 11f, and the seventh electro-chromic 11g along the optical axis may be changed, for example, the fifth electro-chromic 11e, the sixth electro-chromic 11f, and the seventh electro-chromic 11g are arranged in order from the object side to the image side along the optical axis; or the sixth electro-chromic 11f, the fifth electro-chromic 11e, and the seventh electro-chromic 11g are arranged in order from the object side to the image side along the optical axis.
Wherein the fifth electrochromic filter 11e is operable to switch between a band of wavelengths that is transparent to the first and second colors of light and a band of wavelengths that is transparent to the third color of light. The sixth electro-chromic filter 11f may be used to switch between a band that transmits the first color light and the third color light and a band that transmits the second color light. The seventh electrochromic filter 11g is for switching between a band transmitting the first color light and the second color light and a band transmitting the second color light and the third color light.
In the first state, the fifth color filter 11e is capable of transmitting the first color light and the second color light, the sixth color filter 11f is capable of transmitting the first color light and the third color light, the seventh color filter 11g is capable of transmitting the first color light and the second color light, and the color filter group 1 is capable of transmitting the first color light; in the second state, the fifth electrochromic filter 11e is capable of transmitting the first color light and the second color light, the sixth electrochromic filter 11f is capable of transmitting the second color light, the seventh electrochromic filter 11g is capable of transmitting the second color light and the third color light, and the electrochromic filter group 1 is capable of transmitting the second color light; in the third state, the fifth color filter 11e is capable of transmitting the third color light, the sixth color filter 11f is capable of transmitting the first color light and the third color light, the seventh color filter 11g is capable of transmitting the second color light and the third color light, and the color filter group 1 is capable of transmitting the third color light.
Taking the first color light as red light, the second color light as green light, the third color light as blue light as an example, and taking R as red light, G as green light, and B as blue light, the first state, the second state and the third state of the electrochromic filter group are shown in the following table 3. Table 3 is a table of the combination of transmission bands of each electrochromic filter when the group of electrochromic filters achieve RGB transmission.
First state Second state Third state
Electrochromic filter 11e R+G R+G B
Electrochromic filter 11f R+B G R+B
Electrochromic filter 11g R+G G+B B+G
Electroluminescence filter group R G B
TABLE 3 Table 3
As shown in table 3, the electrochromic filter group 1 includes an electrochromic filter 11e, an electrochromic filter 11f, and an electrochromic filter 11g, each of the electrochromic filters 11 has two different transmission bands, and the different transmission bands of the electrochromic filters 11 are switched by changing the driving electric signal. Wherein r+g represents red light and green light; R+B represents red light and blue light, and G+B represents green light and blue light.
Specifically, the two transmission bands of the electrochromic filter 11e are r+g and B, respectively, i.e., one of the two transmission bands allows both the R channel and the G channel to transmit through the electrochromic filter 11e, and the other of the two transmission bands allows the B channel to transmit through the electrochromic filter 11e. The two transmission bands of the electrochromic filter 11f are r+b and G, respectively, i.e., one of the two transmission bands allows both the R channel and the B channel to transmit through the electrochromic filter 11f, and the other of the two transmission bands allows the G channel to transmit through the electrochromic filter 11f. The two transmission bands of the electrochromic filter 11G are g+b and r+g, respectively, i.e., one of the two transmission bands allows both the G channel and the B channel to transmit through the electrochromic filter 11G, and the other of the two transmission bands allows both the R channel and the G channel to transmit through the electrochromic filter 11G.
Thus, in the first state of the electrochromic filter group 1: changing the driving electric signal, controlling the permeation wave band of the electrochromic filter 11e to be an R+G channel, controlling the permeation wave band of the electrochromic filter 11f to be an R+B channel, and controlling the permeation wave band of the electrochromic filter 11G to be an R+G channel, wherein the permeation wave band of the electrochromic filter group 1 is an R channel; in the second state of the electrochromic filter group 1: changing the driving electric signal, controlling the transmission wave band of the electro-color filter 11e to be an R+G channel, controlling the transmission wave band of the electro-color filter 11f to be a G channel, and controlling the transmission wave band of the electro-color filter 11G to be a G+B channel, wherein the transmission wave band of the electro-color filter group 1 is a G channel; in the third state of the electrochromic filter group 1: the driving electric signal is changed to control the transmission wave band of the electro-color filter 11e to be B channel, the transmission wave band of the electro-color filter 11f to be R+B channel, and the transmission wave band of the electro-color filter 11G to be B+G channel, and at this time, the transmission wave band of the electro-color filter group 1 is B channel.
That is, in order to realize true color photographing, the photosensitive element needs to obtain information of the subject R channel, G channel, and B channel. Therefore, in one imaging period, the switching of the electrochromic filter group in the three states needs to be realized by adjusting the driving electric signal. In addition, in order to reduce the influence of the movement of the subject on the photographing during the switching time of the different transmission bands of the electrochromic filter, and in order to ensure the smoothness of the video photographing, it is required that the switching time t of each band of the electrochromic filter is sufficiently fast, for example, t <20ms.
In addition, in the imaging period, the switching sequence of the three states of the electrochromic filter group is not limited, for example, the electrochromic filter group can be sequentially controlled to be in a first state, a second state and a third state, and correspondingly, light rays of the R channel, the G channel and the B channel are sequentially allowed to pass through the electrochromic filter group and enter the photosensitive element. The photosensitive element images in turn for three transmission bands of the electrochromic filter group, and the obtained monochromatic imaging information of each band is used for image processing and synthesis.
According to the image pickup module provided by the embodiment of the application, all pixels of the photosensitive element can obtain R/G/B three-color information, all pixels of the photosensitive element can directly obtain imaging information of an R channel, a G channel and a B channel, the monochromatic resolution is equivalent to the full-channel resolution, compared with the existing scheme, the image pickup module is obviously improved, the color is not required to be restored through interpolation of adjacent pixels, the color restoration degree is higher, the color restoration degree and the imaging resolution of shooting are improved, and the shooting experience is more real.
The description above is given by taking only an example in which the electro-color filter group includes two electro-color filters (as shown in fig. 2 and 3) and includes three electro-color filters (as shown in fig. 4) with reference to fig. 2 to 4. It will be appreciated that other implementations of the camera module are possible, for example, the electrochromic filter set shown in fig. 4 may be disposed on one side of the lens set near the photosensitive element, or may be disposed on the other side of the lens set far from the photosensitive element; as another example, the electrochromic filter set shown in fig. 4 may be replaced with the electrochromic filter set shown in fig. 2 or 3.
In addition, the embodiment of the application also provides electronic equipment, which comprises the camera module.
Fig. 5 is a flowchart of an image capturing method according to an embodiment of the present application. The image capturing method can be applied to the above electronic device, as shown in fig. 5, and includes the following steps:
S501, independently transmitting first color light, second color light and third color light in three primary color light in one imaging period through an electrochromic filter component; wherein the electrochromic filter group includes at least two electrochromic filters, each of which is capable of changing a transmitted wavelength band according to a change of a driving electric signal so as to transmit one or both of the first color light, the second color light, and the third color light.
Illustratively, each electrochromic filter is capable of switching between transmitting two different wavelength bands and at least one wavelength band is capable of transmitting two of the first, second and third colors of light within one imaging period. Wherein, the first one of the first color light, the second color light and the third color light can be red light, and the wavelength range of the red light is 580nm-700nm; the second of the first, second and third color light may be green light, the wavelength of green light ranging from 500nm to 580nm; the third one of the first, second and third color light may be blue light having a wavelength in the range of 400nm-500nm.
In addition, the first, second and third colors of light in the three primary colors of light may be transmitted by the electrochromic filter component in three ways, but are not limited to:
mode 1-the electrochromic filter group includes a first electrochromic filter for switching between a band transmitting the first color light and a band transmitting the second color light and the third color light, and a second electrochromic filter for switching between a band transmitting the first color light and the second color light and a band transmitting the third color light.
Specifically: in the first state, the first electrochromic filter transmits the first color light, and the second electrochromic filter transmits the first color light and the second color light, so that the electrochromic filter group transmits the first color light; in the second state, the first electrochromic filter transmits the second color light and the third color light, and the second electrochromic filter transmits the first color light and the second color light, so that the electrochromic filter group transmits the second color light; in the third state, the first electrochromic filter is made to transmit the second color light and the third color light, and the second electrochromic filter is made to transmit the third color light, so that the electrochromic filter group is made to transmit the third color light.
Mode 2-the electrochromic filter group includes a third electrochromic filter for switching between a band through which the first color light and the second color light are transmitted and a band through which the second color light and the third color light are transmitted; the fourth electrochromic filter is for switching between a band that transmits the first color light and the third color light and a band that transmits the second color light and the third color light.
Specifically: in the first state, the third electrochromic filter transmits the first color light and the second color light, and the fourth electrochromic filter transmits the first color light and the third color light, so that the electrochromic filter group transmits the first color light; in the second state, the third electrochromic filter transmits the first color light and the second color light, and the fourth electrochromic filter transmits the second color light and the third color light, so that the electrochromic filter group transmits the second color light; in the third state, the third electrochromic filter is made to transmit the second color light and the third color light, and the fourth electrochromic filter is made to transmit the first color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
Mode 3-the electrochromic filter group includes a fifth electrochromic filter for switching between a band transmitting the first color light and the second color light and a band transmitting the third color light, a sixth electrochromic filter, and a seventh electrochromic filter; a sixth electro-chromic filter for switching between a band through which the first color light and the third color light are transmitted and a band through which the second color light is transmitted; the seventh electrochromic filter is for switching between a band that transmits the first color light and the second color light and a band that transmits the second color light and the third color light.
Specifically: in the first state, allowing the fifth electrochromic filter to transmit the first color light and the second color light, allowing the sixth electrochromic filter to transmit the first color light and the third color light, and allowing the seventh electrochromic filter to transmit the first color light and the second color light, so that the electrochromic filter group transmits the first color light; in the second state, the fifth electrochromic filter transmits the first color light and the second color light, the sixth electrochromic filter transmits the second color light, and the seventh electrochromic filter transmits the second color light and the third color light, so that the electrochromic filter group transmits the second color light; in the third state, the fifth electrochromic filter is made to transmit the third color light, the sixth electrochromic filter is made to transmit the first color light and the third color light, and the seventh electrochromic filter is made to transmit the second color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
S502, enabling the photosensitive element to generate a first image according to the first color light, generating a second image according to the second color light and generating a third image according to the third color light, and arranging the electrochromic filter group and the photosensitive element in sequence from the object side to the image side along the optical axis.
S503, performing a synthesis process on the first image, the second image, and the third image to generate a target image.
In addition, the lens group may be disposed along the optical axis near the object side with respect to the photosensitive element. Half of the diagonal dimension of the imaging surface of the photosensitive element is IMH, namely IMH is the maximum half image height of the photosensitive element, and the effective focal length of the lens group is f, so that the following conditions are satisfied: f/IMH >0.83. In some examples, the lens group 3 satisfies the following relationship: 21.63 Xf/IMH >18.
Illustratively, the electrochromic filter group and the lens group may have, but are not limited to, the following three ways:
Mode 1-the lens group includes a first lens group including at least one lens and a second lens group including at least one lens, and the electrochromic filter group is disposed between the first lens group and the second lens group.
Mode 2-the lens group includes at least one lens, and the electrochromic filter group is located on a side of the lens group near the photosensitive element.
Mode 3-the lens group includes at least one lens, and the electrochromic filter group is located on the other side of the lens group away from the photosensitive element.
In the image pickup method of the embodiment of the application, the electrochromic filter group enables all pixels of the photosensitive element to directly obtain R/G/B three-color information, the resolution is equivalent to the full channel resolution, and the resolution of a target image can be obviously improved; and the color is restored without interpolation estimation, so that the color restoration degree is higher, and the shooting experience is more real.
In summary, in order to solve the problems of false color and the like caused by the existing color restoration technology, the embodiment of the application provides an image pickup module with an electro-optical filter, which uses a time division color filtering and multi-frame fusion technology, color information obtained by a photosensitive element does not need interpolation estimation, and the color restoration degree is improved, so that the system competitiveness is greatly improved, and the application can be practically applied to electronic equipment with a shooting function.
Specifically, the image capturing module with the electro-optical filter provided by the embodiment of the application can include an electro-optical filter set, an imaging lens set and a photosensitive element. The electrochromic filter group consists of two or more electrochromic filters, each electrochromic filter has two different transmission wave bands, and the different transmission wave bands of the electrochromic filter are rapidly switched by electric signals, namely, the switching of the different transmission wave bands of the electrochromic filter group can be realized by changing driving electric signals, and the transmission wave bands of the electrochromic filter group are intersection of the transmission wave bands of the electrochromic filters. In one imaging period, the transmission wave band of each electrochromic filter can be changed by changing the driving electric signals, and then the transmission wave band of the electrochromic filter group is changed. The photosensitive element images in turn for different transmission wave bands of the electrochromic filter group, and the obtained imaging information of each transmission wave band is used for image processing and synthesis.
That is, the transmission wave bands of the electrochromic filter group are controlled in sequence, the photosensitive element does not need a Bayer filter, all pixels can directly obtain R/G/B three-color information, the resolution is equivalent to the resolution of a full channel, and the resolution is obviously improved compared with the resolution of the prior scheme; in addition, the camera module provided by the embodiment of the application does not need to estimate the restored color through interpolation, so that the color restoration degree is higher, and the shooting experience is more real.
The last explanation is: the above embodiments are only for illustrating the technical solution of the present application, but are not limited thereto; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (16)

1. An image pickup module, characterized in that the image pickup module comprises an electrochromic filter group (1) and a photosensitive element (2) which are sequentially arranged from an object side to an image side along an optical axis, the electrochromic filter group (1) comprises at least two electrochromic filters (11), each electrochromic filter (11) can change a transmitted wave band according to the change of a driving electric signal so as to transmit one or two of first color light, second color light and third color light of three-primary color light;
In one imaging period, the electrochromic filter group (1) can make the first color light, the second color light and the third color light independently penetrate in a time sharing mode, and then the photosensitive element (2) generates a first image according to the first color light, generates a second image according to the second color light and generates a third image according to the third color light, and the first image, the second image and the third image are used for carrying out synthesis processing to generate a target image.
2. An imaging module according to claim 1, characterized in that each of the electrochromic filters (11) is switchable between transmitting two different wavelength bands and at least one wavelength band is transparent for both the first, second and third color light.
3. The camera module according to claim 2, wherein the electro-active color filter group (1) comprises:
A first electrochromic filter (11 a) for switching between a wavelength band transmitting the first color light and a wavelength band transmitting the second color light and the third color light;
a second electrochromic filter (11 b) for switching between a band in which the first color light and the second color light are transmitted and a band in which the third color light is transmitted;
In the first state, the first color filter (11 a) is capable of transmitting the first color light, the second color filter (11 b) is capable of transmitting the first color light and the second color light, and the color filter group (1) is capable of transmitting the first color light;
In a second state, the first electrochromic filter (11 a) is transmissive to the second and third color light, the second electrochromic filter (11 b) is transmissive to the first and second color light, and the electrochromic filter set (1) is transmissive to the second color light;
In a third state, the first electrochromic filter (11 a) is transmissive to the second color light and the third color light, the second electrochromic filter (11 b) is transmissive to the third color light, and the electrochromic filter group (1) is transmissive to the third color light.
4. The camera module according to claim 2, wherein the electro-active color filter group (1) comprises:
A third electrochromic filter (11 c) for switching between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted;
A fourth electrochromic filter (11 d) for switching between a band in which the first color light and the third color light are transmitted and a band in which the second color light and the third color light are transmitted;
In the first state, the third color filter (11 c) is capable of transmitting the first color light and the second color light, the fourth color filter (11 d) is capable of transmitting the first color light and the third color light, and the color filter group (1) is capable of transmitting the first color light;
In a second state, the third electrochromic filter (11 c) is transmissive to the first and second colors of light, the fourth electrochromic filter (11 d) is transmissive to the second and third colors of light, and the electrochromic filter set (1) is transmissive to the second color of light;
In a third state, the third electrochromic filter (11 c) is transmissive to the second color light and the third color light, the fourth electrochromic filter (11 d) is transmissive to the first color light and the third color light, and the electrochromic filter group (1) is transmissive to the third color light.
5. The camera module according to claim 2, wherein the electro-active color filter group (1) comprises:
A fifth electrochromic filter (11 e) for switching between a band in which the first color light and the second color light are transmitted and a band in which the third color light is transmitted;
a sixth electro-luminescent filter (11 f) for switching between a wavelength band that transmits the first color light and the third color light and a wavelength band that transmits the second color light;
A seventh electrochromic filter (11 g) for switching between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted;
And, in a first state, the fifth electrically-induced color filter (11 e) is permeable to the first color light and the second color light, the sixth electrically-induced color filter (11 f) is permeable to the first color light and the third color light, the seventh electrically-induced color filter (11 g) is permeable to the first color light and the second color light, and the electrically-induced color filter group (1) is permeable to the first color light;
In a second state, the fifth electrically conductive color filter (11 e) is transmissive to the first color light and the second color light, the sixth electrically conductive color filter (11 f) is transmissive to the second color light, the seventh electrically conductive color filter (11 g) is transmissive to the second color light and the third color light, and the electrically conductive color filter group (1) is transmissive to the second color light;
in a third state, the fifth electrochromic filter (11 e) is transmissive to the third color light, the sixth electrochromic filter (11 f) is transmissive to the first color light and the third color light, the seventh electrochromic filter (11 g) is transmissive to the second color light and the third color light, and the electrochromic filter group (1) is transmissive to the third color light.
6. The camera module according to any one of claims 1 to 5, further comprising a control circuit connected to the at least two electrochromic filters (11) respectively and changing the transmission band of the corresponding electrochromic filter (11) by controlling the driving electric signal; wherein:
The drive electrical signal comprises a voltage signal comprising at least one of a pulsed electrical signal and a continuous electrical signal; or alternatively, the first and second heat exchangers may be,
The drive electrical signal includes a current signal including at least one of a pulsed electrical signal and a continuous electrical signal.
7. The camera module according to any one of claims 1-6, further comprising a lens group (3), the lens group (3) being arranged along an optical axis near the object side relative to the photosensitive element (2), wherein:
The lens group (3) comprises a first lens group (31) and a second lens group (32), the first lens group (31) comprises at least one lens (T), the second lens group (32) comprises at least one lens (T), and the electrochromic filter group (1) is arranged between the first lens group (31) and the second lens group (32); and/or the number of the groups of groups,
The lens group (3) comprises at least one lens (T), the electrochromic filter group (1) being located at one of a side of the lens group (3) close to the photosensitive element (2) and the other side remote from the photosensitive element (2).
8. The imaging module according to claim 7, wherein half of the diagonal dimension of the imaging surface of the photosensitive element (2) is IMH, and the effective focal length of the lens group (3) is f, satisfying: f/IMH >0.83.
9. The camera module of any one of claims 1-8, wherein a first one of the first, second, and third color lights is red light, the red light having a wavelength in a range of 580nm-700nm; the second of the first, second and third color light is green light, and the wavelength range of the green light is 500-580 nm; and a third one of the first color light, the second color light and the third color light is blue light, and the wavelength range of the blue light is 400-500 nm.
10. An electronic device comprising the camera module of any one of claims 1-9.
11. An image pickup method, characterized by comprising:
allowing the first color light, the second color light and the third color light in the three primary colors of light to be transmitted independently through the electrochromic filter component in one imaging period; wherein the electrochromic filter group includes at least two electrochromic filters, each of which is capable of changing a transmitted wavelength band according to a change in a driving electric signal so as to transmit one or both of the first color light, the second color light, and the third color light;
Generating a first image by using a photosensitive element according to the first color light, generating a second image by using the second color light, and generating a third image by using the third color light, wherein the electrochromic filter group and the photosensitive element are sequentially arranged from an object side to an image side along an optical axis;
and synthesizing the first image, the second image and the third image to generate a target image.
12. The image capturing method according to claim 11, wherein each of the electrochromic filters is switchable between transmitting two different wavelength bands in one imaging period, and at least one wavelength band is permeable to two of the first color light, the second color light, and the third color light.
13. The image capturing method according to claim 12, wherein the electrochromic filter group includes a first electrochromic filter for switching between a wavelength band through which the first color light is transmitted and a wavelength band through which the second color light and the third color light are transmitted, and a second electrochromic filter for switching between a wavelength band through which the first color light and the second color light are transmitted and a wavelength band through which the third color light is transmitted; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps:
in a first state, transmitting the first color light through the first electrochromic filter and transmitting the first color light and the second color light through the second electrochromic filter so as to transmit the first color light through the electrochromic filter group;
In a second state, transmitting the first electrochromic filter through the second color light and the third color light, and transmitting the second electrochromic filter through the first color light and the second color light, so that the electrochromic filter group transmits the second color light;
In a third state, the first electrochromic filter is made to transmit the second color light and the third color light, and the second electrochromic filter is made to transmit the third color light, so that the electrochromic filter group is made to transmit the third color light.
14. The image capturing method according to claim 12, wherein the electrochromic filter group includes a third electrochromic filter for switching between a wavelength band through which the first color light and the second color light are transmitted and a wavelength band through which the second color light and the third color light are transmitted; the fourth electrochromic filter is configured to switch between a band in which the first color light and the third color light are transmitted and a band in which the second color light and the third color light are transmitted; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps:
In a first state, transmitting the third electrochromic filter through the first color light and the second color light, and transmitting the fourth electrochromic filter through the first color light and the third color light, so that the electrochromic filter group transmits the first color light;
In a second state, transmitting the third electrochromic filter through the first color light and the second color light, and transmitting the fourth electrochromic filter through the second color light and the third color light, so that the electrochromic filter group transmits the second color light;
In a third state, the third electrochromic filter is made to transmit the second color light and the third color light, and the fourth electrochromic filter is made to transmit the first color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
15. The image capturing method according to claim 12, wherein the group of electrochromic filters includes a fifth electrochromic filter for switching between a wavelength band through which the first color light and the second color light pass and a wavelength band through which the third color light passes, a sixth electrochromic filter, and a seventh electrochromic filter; the sixth electrochromic filter is configured to switch between a band that transmits the first color light and the third color light and a band that transmits the second color light; the seventh electrochromic filter is configured to switch between a band in which the first color light and the second color light are transmitted and a band in which the second color light and the third color light are transmitted; the method for transmitting the first color light, the second color light and the third color light in the trichromatic light when the electrochromic filter component comprises the following steps:
In a first state, transmitting the fifth electrochromic filter through the first color light and the second color light, transmitting the sixth electrochromic filter through the first color light and the third color light, and transmitting the seventh electrochromic filter through the first color light and the second color light, so that the electrochromic filter group transmits the first color light;
In a second state, transmitting the fifth electrochromic filter through the first color light and the second color light, transmitting the sixth electrochromic filter through the second color light, and transmitting the seventh electrochromic filter through the second color light and the third color light, so that the electrochromic filter group transmits the second color light;
In a third state, the fifth electrochromic filter is made to transmit the third color light, the sixth electrochromic filter is made to transmit the first color light and the third color light, and the seventh electrochromic filter is made to transmit the second color light and the third color light, so that the electrochromic filter group is made to transmit the third color light.
16. The image pickup method according to any one of claims 11 to 15, wherein a first one of the first color light, the second color light, and the third color light is red light, and a wavelength of the red light ranges from 580nm to 700nm; the second of the first, second and third color light is green light, and the wavelength range of the green light is 500-580 nm; and a third one of the first color light, the second color light and the third color light is blue light, and the wavelength range of the blue light is 400-500 nm.
CN202310072693.4A 2023-01-12 2023-01-12 Image pickup method, image pickup module and electronic equipment Pending CN118338147A (en)

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