TW201724843A - Image sensor, terminal having same and imaging method using same - Google Patents

Abstract

The present disclosure describes an image sensor. The image sensor includes a photosensitive unit array, an amplitude conversion unit assembly having a number of amplitude conversion units, and a filter array. The photosensitive unit array includes a number of photosensitive units. The amplitude conversion units are configured for converting photogenerated charge of the photosensitive units to analog signals. The filter array is arranged on the photosensitive unit array and includes a number of filter units. Each filter unit having the same color corresponds to number of photosensitive units. In photosensitive units corresponding to a filter unit having the same color, photogenerated charge generated by portions of the photosensitive units is combined and then converted by one amplitude conversion unit to a first analog signal, photogenerated charge of the rest of the photosensitive units is combined and then converted by the other one amplitude conversion unit to a second analog signal. The first analog signal is different from the second analog signal. The present disclosure also describes a terminal and an imaging method.

Description

Image sensor and terminal and imaging method

The present invention belongs to the field of image processing technologies, and in particular, to an image sensor, and a terminal and imaging method having the image sensor.

With the popularity of mobile phones, taking pictures with mobile phones has become a favorite of more and more people. However, with the improvement of the requirements for photographing, the HDR (High-Dynamic Range) function of the image processing of the mobile phone has become a demand of the user. However, at present, the HDR function is generally implemented by software, and the effect is not obvious.

The present invention aims to solve at least one of the technical problems in the related art to some extent.

In order to solve the above problems, an aspect of the present invention provides an image sensor, the image sensor comprising: a pixel unit array including a plurality of pixel units; and an amplification conversion unit element including a plurality of amplification conversion units, each increasing The conversion unit is configured to convert the photo-generated charge generated by the pixel unit into an analog signal; the filter array disposed on the pixel unit array, the filter array includes a plurality of filter units, and the filter unit of the same color corresponds to the plurality of pictures a prime unit; wherein the photo-generated charges generated by a part of the pixel units of the plurality of pixel units corresponding to the filter unit of the same color are combined and output by an amplification conversion unit to output a first analog signal, and the filter unit of the same color The photo-generated charge generated by the remaining pixel units of the corresponding plurality of pixel units is accumulated and then shared by an increasing conversion unit to output a second analog signal, the first analog signal and the second analog signal being different.

In the image sensor of the present invention, the filter unit based on the same color corresponds to a plurality of pixel units, and the plurality of pixel units corresponding to the filter unit of the same color are converted by the amplitude conversion unit to output two different analog signals. The HDR function provides a hardware foundation. Compared with the software in the related art, the HDR function is implemented by the hardware sensor to improve the HDR effect.

In at least one embodiment, the image sensor comprises a CMOS image sensor.

In at least one embodiment, the filter array comprises a Bayer array.

In at least one embodiment, the image sensor further includes: an analog to digital conversion unit element including an analog-to-digital converter (ADC), and the analog-to-digital conversion unit element is used to compare the first analogy The signal and the second analog signal are converted into a first digital signal and a second digital signal, respectively.

In at least one embodiment, the plurality of pixel units corresponding to the filter elements of the same color are located in different rows of the pixel unit array.

In at least one embodiment, the filter unit of the same color corresponds to 2 rows and 2 columns totaling 4 pixel units, the photo-generated charge generated by the two-pixel unit in the first row and the pixel unit located in the second row. The generated photo-generated charge is converted into the first analog signal by the amplification conversion unit, and the photo-generated charge generated by the other pixel unit in the second row is converted into the second analog signal by the amplification conversion unit, the first analogy The signal is converted into the first digital signal by an analog to digital conversion unit, and the second analog signal is converted into the second digital signal by another analog to digital conversion unit.

In at least one embodiment, the image sensor further includes: a micromirror array disposed on the filter array, each micromirror in the micromirror array corresponding to a pixel unit.

In at least one embodiment, the image sensor further includes a control module and an image processing module, wherein the control module is configured to control the plurality of pixel units corresponding to the filter unit of the same color to be simultaneously exposed according to the line. The image processing module synthesizes the output of the analog to digital conversion unit to obtain a high dynamic range image.

In order to solve the above problems, another aspect of the present invention provides a terminal including the image sensor of the above aspect.

According to the terminal of the present invention, the HDR function can be realized based on the hardware structure of the image sensor by using the image sensor, and the HDR image effect is improved.

In at least one embodiment, the imaging terminal includes a cell phone.

In at least one embodiment, the imaging terminal further includes a central processing unit and a display device coupled to the image sensor, the central processor configured to control the display device to display a high dynamic range map of the image sensor output image.

In at least one embodiment, the terminal includes a central processing unit and an external memory connected to the image sensor, and the central processing unit is configured to control the external memory to store a high dynamic range map of the image sensor output. image.

Another aspect of the present invention provides an imaging method based on the image sensor described above, wherein the plurality of pixel units corresponding to the filter unit of the same color constitute a merged pixel, and the image processing method includes: reading the picture An output of the cell array; and adding the output of the pixel unit of the same merged pixel to obtain a pixel value of the merged pixel to generate a merged image.

Since the noise of the merged pixels is smaller than the sum of the pixel noises before the combination, the imaging method can obtain images with high signal-to-noise ratio, brightness and sharpness, and less noise under low illumination. Overcoming the shortcomings of some existing imaging methods.

In at least one embodiment, the imaging device includes a temporary memory, each of the filtering units covering 2*2 of the photographic pixels; the reading step further comprising: collecting the kth row and the k+1th row The output of the pixel unit is stored in the register, where k=2n-1, n is a natural number, k+1 is less than or equal to the total number of rows of the pixel unit; and the kth line is extracted from the register And the output of the pixel unit of the k+1th row, the output of the pixel unit of the same merged pixel is added to obtain the pixel value of the combined pixel.

In at least one embodiment, the step of reading further comprises converting the analog signal output of the photoreceptor to a digital signal output.

In order to solve the above problems, another embodiment of the present invention provides a mobile terminal, which includes a housing, a processor, a memory, a circuit board, and a power supply circuit, wherein the circuit board is disposed in the housing Inside the space, the processor and the memory are disposed on the circuit board; the power circuit is configured to supply power to each circuit or device of the mobile terminal; the memory is used to store executable code; the processor is configured by The executable code stored in the memory is read to run a program corresponding to the executable code for performing the imaging method of the above embodiment of the present invention.

In the mobile terminal of the embodiment of the present invention, by reading the output of the pixel unit array, the output of the pixel unit of the same merged pixel is added to obtain a pixel value of the combined pixel to generate a merged image, The noise of the combined pixels is smaller than the sum of the pixel noises before the combination, and the image with higher signal to noise ratio, brightness and sharpness, and less noise can be obtained under low illumination.

In order to solve the above problems, another embodiment of the present invention provides a computer readable storage medium having instructions stored therein, when the processor of the mobile terminal executes the instruction, the mobile terminal performs the embodiment as in the above aspect. Imaging method.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

First, an image sensor of an embodiment of the present invention will be described. 1 is a functional block diagram of an image sensor in accordance with an embodiment of the present invention.

As shown in FIG. 1, the image sensor 100 includes a pixel unit array 10, an amplification conversion unit element 20, and a filter array 30.

The pixel unit array 10 includes a complex pixel unit 11; the amplification conversion unit element 20 is configured to convert the photo-generated charge generated by the pixel unit 11 into an analog signal; and the filter array 30 is disposed on the pixel unit array 10, each filter The array 30 includes a plurality of filter units 31, and the filter unit 31 of the same color corresponds to the plurality of pixel units 11.

The photo-generated charge generated by a part of the pixel units 11 of the plurality of pixel units 11 corresponding to the filter unit 31 of the same color is shared by an amplification conversion unit SF to output the first analog signal A1, and the filter unit 31 of the same color. The photo-generated charge generated by the remaining pixel unit 11 in the corresponding pixel unit 11 is shared by an amplification conversion unit SF to output a second analog signal A2. The first analog signal A1 and the second analog signal A2 are different.

In the image sensor 100 of the present invention, the filter unit 31 based on the same color corresponds to the plurality of pixel units 11, and the plurality of pixel units 11 corresponding to the filter unit 31 of the same color are converted by the amplitude conversion unit element 20 and output two. Different analog signals provide a hardware foundation for implementing the HDR function. Compared with the software in the related art, the image sensor 100 implements the HDR function by hardware improvement and improves the HDR effect.

As shown in FIG. 2, the image sensor 100 further includes an analog-to-digital conversion unit component 40. The analog-to-digital conversion unit 4 component 0 converts the first analog signal A1 and the second analog signal A2 into a first digital signal D1 and The second digit signal D2 provides information for image processing. The analog to digital conversion unit element 40 includes a complex first analog to digital conversion unit 41 and a complex second analog to digital conversion unit 42.

In some embodiments of the invention, image sensor 100 includes a CMOS image sensor. Filter array 30 includes a Bayer array.

In some embodiments of the present invention, the plurality of pixel units 11 corresponding to the filter unit 31 of the same color are located in different rows of the pixel unit array 10.

For example, the filter unit 31 of the same color corresponds to a total of four pixel units 11 in two rows and two columns, the photo-generated charge generated by the two-pixel unit 11 in the first row, and the photo-generated from the pixel unit in the second row. After the charge is accumulated, the amplification signal SF is converted into the first analog signal A1, and the photo-generated charge generated by the other pixel unit 11 in the second row is converted into the second analog signal A2 by the amplification conversion unit SF, and the first analog signal A1. The first analog-to-digital signal D2 is converted into the first digital signal D1 by the first analog-to-digital conversion unit 41, and the second analog-to-digital signal A2 is converted into the second digital signal D2 by the second analog-to-digital conversion unit 42.

Referring to FIG. 3, which is a schematic diagram of the distribution of the filter array 30 according to an embodiment of the present invention, the filter array 30 adopts a Bayer array color mode in which the same characters represent the filter unit 31 of the same color ( For example, Gr, Gb, R, B), the number after the character indicates the row number of the pixel unit corresponding to the filtering unit 31 of the same color, and the filter unit 31 of different colors allows only the light of the corresponding wavelength to pass.

The Bayer array is a common filter cell array structure. In the Bayer array, the filter unit 31 can be a green (G), red (R), and blue (B) filter unit, wherein the two green filter units, a red filter unit, and a blue filter unit are formed. A filter structure 32. In the present embodiment, each of the filter units 31 corresponds to the four pixel unit 11.

4 is an equivalent circuit diagram of an image sensor according to an embodiment of the present invention. As shown in FIG. 4, the fourth pixel unit includes a first pixel unit PD1 and a first transfer switch TG1 and a second pixel unit PD2. And a second transfer switch TG2, a third pixel unit PD3 and a third transfer switch TG3, a fourth pixel unit PD4 and a fourth transfer switch TG4, a first amplification conversion unit SF1 and a first analog to digital conversion unit 41, and a second The amplification conversion unit SF2 and the second analog-to-digital conversion unit 42. Wherein, a pixel unit, such as a photodiode, receives light transmitted by the filter unit 31 to generate a charge, and when the transfer switch is turned on, the charge generated by the corresponding pixel unit 11 is output, and then coupled and converted to the amplification conversion unit element 20 The voltage signal is converted into a digital signal output by the analog-to-digital conversion unit component 40 to provide a data basis for image processing.

Specifically, the first pixel unit PD1 is connected to the first end of the first transfer switch TG1, the second pixel unit PD2 is connected to the first end of the second transfer switch TG2, and the third pixel unit PD3 and the third transfer switch are connected. The first end of the TG3 is connected, the fourth pixel unit PD4 is connected to the first end of the fourth transfer switch TG4, the control end of the first transfer switch TG1, the control end of the second transfer switch TG2, and the third transfer switch TG3 are controlled. The control ends of the terminal and the fourth transmission switch TG4 are both connected to the control module, and the control module controls the opening and closing of the four transmission switches. When the transmission switch is turned on, the corresponding pixel unit transmits a signal. The first pixel unit PD1, the second pixel unit PD2, the third pixel unit PD3, and the fourth pixel unit PD4 are pixel units respectively adjacent to the filter unit of the same color, for example, FIG. As shown in the figure, the four pixel unit 11 is a pixel unit 11 corresponding to the filter unit 31 in which the same character is identified, that is, four adjacent pixel units 11 receive light of the same color, simply, that is, The four pixel unit 11 constitutes a large pixel.

The first end of the first amplification conversion unit SF1 is respectively connected to the second end of the first transmission switch TG1, the second end of the second transmission switch TG2, and the second end of the third transmission switch TG3, and the first amplification conversion unit SF1 The second end is connected to the preset power supply Vdd, and the third end of the first amplification conversion unit SF1 is connected to the input end of the first analog-to-digital conversion unit 41;

The first end of the second amplification conversion unit SF2 is connected to the second end of the fourth transmission switch TG4, the second end of the second amplification conversion unit SF2 is connected to the preset power supply Vdd, and the third end of the second amplification conversion unit SF2 is The input of the second analog-to-digital conversion unit 42 is connected, and the output of the second analog-to-digital conversion unit 42 is connected to the output of the first analog-to-digital conversion unit 41.

The control module of the image sensor 100 is configured to control the plurality of pixel units 11 corresponding to the filter unit 31 of the same color to be simultaneously exposed according to the line, and the image processing module synthesizes the output of the analog-to-digital conversion unit 40 to obtain a high Dynamic range image.

As an example, the 2i+1 (i=0, 1, 2, 3, 4...) rows in the pixel unit array 10 correspond to each of the filter units 31 in the 2i+2th row adjacent to the 2i+1th row. The three pixel units (such as the pixel units corresponding to the filter units Gr1, Gr2, and Gr4), that is, the first pixel unit PD1 and the second pixel unit PD2 and the third pixel unit PD3 share an amplification conversion unit That is, the first amplification conversion unit SF1, the charge generated by the first pixel unit PD1, the second pixel unit PD2, and the third pixel unit PD3 are collected, and the collected charge is converted into a voltage signal by the first amplification conversion unit SF1. And further converted into a digital signal output by the first analog-to-digital conversion unit 41, wherein the output value of the first analog-to-digital conversion unit 41 is set to ADC1; in addition, each of the 2i+2 rows in the pixel unit array 10 is filtered. One pixel unit of the unit 31 (such as a pixel unit corresponding to the filter unit Gr3), that is, the fourth pixel unit PD4 performs charge conversion by the second amplification conversion unit SF2, and finally by the second analog-to-digital conversion unit 42. Converted to digital signal output, it is assumed that the output value of the second analog-to-digital conversion unit 42 is ADC2.

Specifically, the filter unit 31 of the same color is used as an example for the four pixel units 11 adjacent to the two rows and two columns. Based on the above configuration, the control module can control the same two adjacent lines when performing HDR control. The color pixels are simultaneously exposed. For example, the 2i+1 and 2i+2 lines are simultaneously exposed, wherein i=0, 1, 2, 3...., and the exposure time is controlled to avoid sharing the first amplification conversion unit SF1. The output of the three pixel unit 11 is saturated. In the embodiment of the present invention, the amplification conversion unit component 20 can function as a summary coupling to the charge output from the pixel unit 11. It can be understood that if the output of the first amplification conversion unit SF1 is S1, the second amplification is set. When the output of the conversion unit SF2 is S2, then S1=3S2 is satisfied, so every four pixel units of the same color simultaneously output a high ADC value and a low ADC value, and further, at the ISP (Image Signal Processor, Image Sensor 100, That is, the image processor) performs synthesis processing to implement the HDR function.

As shown in FIG. 5, the image sensor 100 further includes a micromirror array 50 disposed on the filter array 30. Each of the micromirrors 51 in the micromirror array 50 corresponds to a pixel unit 11, including formation, Size and position correspond. The micromirror 51 can collect light to the photosensitive portion 111 of the pixel unit 11, and enhance the received light intensity of the pixel unit 11, thereby improving the image quality.

Based on the image sensor 100 of the above-described embodiments, a terminal 1000 according to another embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 6 is a functional block diagram of a terminal 1000 in accordance with an embodiment of the present invention. As shown in Figure 6, the terminal 1000 includes the image sensor 100 of the above aspect. Specifically, the terminal 1000 may include a mobile phone.

In some embodiments, as shown in FIG. 7, the terminal 1000 further includes a central processing unit 200 and a display device 300 connected to the image sensor 100, and the central processing unit 200 is configured to control the display device 300 to display image sensing. The high dynamic range image output by the device 100. Thus, the image captured by the terminal 1000 can be displayed on the display device 300 for viewing by the user. The display device 300 includes an LED display or the like.

In some embodiments, as shown in FIG. 8, the terminal 1000 includes a central processing unit 200 and an external memory 400 connected to the image sensor 100. The central processing unit 200 is configured to control the external memory 400 to store an image sense. The high dynamic range image output by the detector 100.

In this way, the generated image can be stored for later viewing, use or transfer. The external memory 400 includes an SM (Smart Media) card, a CF (Compact Flash) card, and the like.

The terminal 1000 can realize the HDR function based on the hardware structure of the image sensor 100 by using the image sensor 100, thereby improving the HDR image effect.

Based on the image sensor of the embodiment of the above aspect, an imaging method according to an embodiment of the present invention is described below with reference to the accompanying drawings, wherein the plurality of pixel units corresponding to the filter unit of the same color constitute a merged pixel.

Figure 9 is a flow chart of an imaging method according to an embodiment of the present invention. As shown in Figure 9, the imaging method includes the following steps:

S1, reading the output of the pixel unit array.

S2, adding the output of the pixel elements of the same merged pixel to obtain the combined pixel values of the pixels to generate a merged image.

In the imaging method of the embodiment of the present invention, it is assumed that the output of each pixel unit is S, the noise is N, and the merged pixels include M pixel units, and the pixel value of the combined pixel is n*m*S. And the noise of the merged pixels is In the case of n=2 and m=2, the noise of the synthesized pixel is about n*m*N/2. Therefore, the brightness of the combined image is improved in a low-brightness environment, and the noise-to-noise ratio is improved.

Referring to FIG. 10, in some embodiments, each filter unit of the same color of the image sensor corresponds to 2*2 pixel units, the image sensor includes a register, and step S2 further includes :

S201, collecting the output of the pixel unit of the kth row and the k+1th row and storing the result in the register, wherein k=2n-1, n is a natural number, and k+1 is less than or equal to the total number of rows of the pixel unit;

S202. Extract the output of the pixel unit of the kth row and the k+1th row from the scratchpad, and add the output of the pixel unit of the same merged pixel to obtain the pixel value of the combined pixel.

In this way, the register can be fully utilized to implement the process of reading, buffering, and merging the pixel units.

Referring to FIG. 11, in some embodiments, step S2 further includes:

S301, converting the analog signal output generated by the pixel unit into a digital signal output; and

S302. The digital signal outputs of the pixel elements of the same merged pixel are added to obtain a pixel value of the combined pixel.

In this way, the image processing module of the digital signal processing chip can directly process the output of the image sensor, and the output of the analog signal format directly compared to the image sensor by the circuit. In the case of processing, the information of the image is better preserved. For example, for an image sensor of 16M pixels, the imaging method of the embodiment of the present invention can generate 4M pixels (2* will be generated). The merged image of 2 pixels combined can also generate the original image of 16M pixels (ie, not merged).

A further embodiment of the present invention further provides a mobile terminal, the mobile terminal comprising a housing, a processor, a memory, a circuit board and a power supply circuit, wherein the circuit board is disposed inside the space enclosed by the housing, the processing And the memory is disposed on the circuit board; the power circuit is configured to supply power to each circuit or device of the mobile terminal; the memory is used to store executable code; the processor reads the memory by reading The executable code stored therein runs a program corresponding to the executable code for performing the imaging method of the above aspect.

The embodiment of the present invention further provides a computer readable storage medium having instructions stored therein. When the processor of the mobile terminal executes the instruction, the mobile terminal performs imaging according to the embodiment of the present invention as shown in FIG. method.

In this document, relational terms such as first and second are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order. Furthermore, the term "comprises" or "comprises" or "comprising" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a singular" is not to be construed as a limitation of the invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer readable medium, For use in an instruction execution system, apparatus, or device (eg, a computer-based system, a system including a processor, or other system that can fetch instructions and execute instructions from an instruction execution system, apparatus, or device), or in conjunction with such instructions, execute systems, devices Or use with equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with such an instruction execution system, apparatus, or device. More specific examples of computer readable media (non-exhaustive list) include the following: electrical connections (electronic devices) with one or more wires, portable computer case (magnetic device), random access memory (RAM) ), read-only memory (ROM), which erases programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable CD-ROM (CDROM). In addition, the computer readable medium may even be a paper on which the program or other suitable medium may be printed, as it may be optically scanned, for example by paper or other media, followed by editing, interpretation or, if necessary, other The program is processed in an appropriate manner to obtain the program electronically and then stored in computer memory.

It should be understood that portions of the invention may be implemented in hardware, software, firmware, or combinations thereof. In the above embodiments, the plurality of steps or methods may be implemented with software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following techniques known in the art or a combination thereof: having a logic gate circuit for implementing logic functions on data signals Discrete logic circuit, dedicated integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

In the description of the present specification, the descriptions of the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" and the like are meant to be combined with the embodiments or The specific features, structures, materials, or characteristics described in the examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any or a plurality of embodiments or examples. In addition, various embodiments or examples described in the specification and features of the various embodiments or examples may be combined and combined.

In the description of the present specification, the descriptions of the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" and the like are intended to refer to the specific features described in connection with the embodiments or examples. The structure, material or features are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any or a plurality of embodiments or examples. In addition, various embodiments or examples described in the specification and features of the various embodiments or examples may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the foregoing embodiments are illustrative, and are not to be construed as limiting the scope of the invention. The embodiments are subject to changes, modifications, substitutions and variations.

100‧‧‧Image sensor
10‧‧‧ pixel element array
11‧‧‧Photosensitive unit
111‧‧‧Photosensitive part
20‧‧‧Amplification conversion unit components
30‧‧‧Filter array
31‧‧‧ Filter unit
32‧‧‧ Filter structure
40‧‧•Analog-to-digital conversion unit components
41‧‧‧ first analog to digital conversion unit
42‧‧‧Second analog to digital conversion unit
50‧‧‧Micromirror array
51‧‧‧Micromirror
1000‧‧‧ Terminal
200‧‧‧ central processor
300‧‧‧ display device

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in which 2 is a schematic diagram of an image sensor according to another embodiment of the present invention; FIG. 3 is a schematic diagram showing a distribution of a filter array according to an embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a block diagram of an image sensor according to still another embodiment of the present invention; FIG. 6 is a diagram of a terminal according to an embodiment of the present invention; FIG. 7 is a functional module diagram of a terminal according to another embodiment of the present invention; FIG. 8 is a functional module diagram of a terminal according to still another embodiment of the present invention; A flowchart of an imaging method according to an embodiment of the present invention, FIG. 10 is a flowchart of an imaging method according to an embodiment of the present invention; and FIG. 11 is a flowchart of an imaging method according to another embodiment of the present invention.

100‧‧‧Image sensor

10‧‧‧ pixel element array

11‧‧‧Photosensitive unit

20‧‧‧Amplification conversion unit components

30‧‧‧Filter array

31‧‧‧ Filter unit

Claims (18)

An image sensor, comprising: - an array of pixel units, comprising a plurality of pixel units; - an amplification conversion unit element comprising a complex amplification unit, each of the amplification units for generating light from the pixel unit The charge is converted into an analog signal; and a filter array disposed on the pixel unit array, the filter array includes a plurality of filter units, the filter unit of the same color corresponding to the plurality of pixel units; wherein the same color The photo-generated charge generated by a part of the pixel units in the plurality of pixel units corresponding to the filter unit is shared by an amplification conversion unit to output a first analog signal, and the remaining pixel units corresponding to the filter unit of the same color remain The photo-generated charge generated by the part of the pixel unit is shared by an amplification conversion unit to output a second analog signal, and the first analog signal and the second analog signal are different. The image sensor of claim 1, wherein the image sensor comprises a CMOS image sensor. The image sensor of claim 1, wherein the filter array comprises a Bayer array. The image sensor of claim 1, further comprising: - an analog to digital conversion unit component comprising a complex analog to digital conversion unit, the analog to digital conversion unit component for using the first analog signal and The second analog signal is converted into a first digital signal and a second digital signal, respectively. The image sensor according to any one of claims 1 to 4, wherein the plurality of pixel units corresponding to the filter unit of the same color are located in different rows of the pixel unit array. The image sensor according to any one of claims 1 to 4, wherein the filter unit of the same color corresponds to 2 rows and 2 columns totaling 4 pixel units, and is located in the first row. The photogenerated charge generated by the pixel unit and the photogenerated charge generated by the pixel unit in the second row are converted into the first analog signal by the amplification conversion unit, and the photogenerated charge generated by the other pixel unit in the second row Converted to the second analog signal by the amplification conversion unit, the first analog signal is converted into the first digital signal by an analog to digital conversion unit, and the second analog signal is converted into the second by another analog to digital conversion unit Digital signal. The image sensor according to any one of claims 1 to 4, further comprising: a micromirror array disposed on the filter array, each micromirror in the micromirror array Corresponding to a pixel unit. The image sensor of claim 4, further comprising: a control module and an image processing module, wherein the control module is configured to control a plurality of filter elements corresponding to the filter unit of the same color The pixel unit is simultaneously exposed in a row, and the image processing module synthesizes the output of the analog to digital conversion unit to obtain a high dynamic range image. A terminal characterized by comprising the image sensor according to any one of claims 1 to 8. The terminal of claim 9, wherein the terminal comprises a mobile phone. The terminal according to claim 9 or 10, wherein the terminal further comprises a central processing unit and a display device connected to the image sensor, wherein the central processor is configured to control the display of the display device The image sensor outputs one of the high dynamic range images. The terminal of claim 9 or 10, wherein the terminal comprises a central processing unit and an external memory connected to the image sensor, wherein the central processing unit is configured to control the external memory storage. The image sensor outputs one of the high dynamic range images. An imaging method for an image sensor according to claim 1, wherein the plurality of pixel units corresponding to the filter unit of the same color constitute a merged pixel, and the image processing method comprises : reading an output of the pixel unit array; and adding the output of the pixel unit of the same merged pixel to obtain a pixel value of the combined pixel to generate a merged image. The imaging method of claim 13, wherein each of the filter units of the same color corresponds to 2*2 of the pixel units. The imaging method of claim 13 or claim 14, wherein the image sensor comprises a register, the reading step further comprising: collecting the kth row and the k+1th row The output of the pixel unit is stored in the register, where k=2n-1, n is a natural number, k+1 is less than or equal to the total number of rows of the pixel unit; and the kth line is extracted from the register And the output of the pixel unit of the k+1th row, the output of the pixel unit of the same merged pixel is added to obtain the pixel value of the combined pixel. The imaging method of claim 13, wherein the reading step further comprises: converting the analog signal output generated by the pixel unit into a digital signal output. A mobile terminal includes a casing, a processor, a memory, a circuit board, and a power supply circuit, wherein the circuit board is disposed inside a space enclosed by the casing, and the processor and the memory are disposed at The power circuit is configured to supply power to each circuit or device of the mobile terminal; the memory is configured to store executable code; and the processor reads the executable code stored in the memory A program corresponding to the executable code is executed for performing the imaging method according to any one of claims 13 to 16. A computer readable storage medium having instructions stored therein, wherein when the processor of the mobile terminal executes the instruction, the mobile terminal performs the imaging method according to any one of claims 13 to 16.