Image sensor pixel array and image sensor

Abstract

The present invention provides an image sensor pixel array and an image sensor, wherein the pixel array comprises: a plurality of pixel units regularly arranged along the row direction and the column direction, the pixel units comprising image pixel units and phase pixel units; a microlens, arranged on the pixel unit, a plurality of image pixel units share a microlens, a plurality of phase pixel units share a microlens, and the number of pixel units sharing the microlens is the same; a plurality of phase pixel units sharing a microlens constitute a first phase pixel unit group or a second phase pixel unit group, the first phase pixel unit group and the second phase pixel unit group are located in different rows and the same column, and constitute a phase pixel unit pair to obtain a phase difference. In the present invention, the same microlens can be used, and there is no lost pixel value in the region where the phase pixel unit is located, so that the image quality of the image sensor is better, and no PDC is required. In addition, the phase pixel unit does not require additional readout time.

Description

Technical Field

[0001] The present invention relates to the technical field of image sensors, and in particular to an image sensor and an image sensor. Background Art

[0002] A complementary metal oxide semiconductor (CMOS) image sensor is a solid-state sensing device using a complementary metal oxide semiconductor. Compared with a charge coupled device (CCD) image sensor, a CMOS image sensor has lower manufacturing costs and lower power consumption. Therefore, CMOS image sensors are used in various electronic devices including portable devices such as smartphones and digital cameras.

[0003] In CMOS image sensors, in order to enable each pixel to receive more light emitted from the lens to avoid waste, improve light utilization and enhance image quality, a microlens is set on the top of each pixel to converge light. These microlenses are called OCL (On Chip Lens).

[0004] The technology of using the microlens array on the CMOS image sensor to collect light and achieve autofocus by analyzing the phase difference of light received at different pixel positions is called MLPD (Microlens Phase Detection). MLPD is a phase detection autofocus technology that can achieve focus faster and provide better performance in low light conditions.

[0005] For most CMOS image sensors with small pixel sizes, products currently on the market typically use a 2×2 MLPD and 1×1 OCL pixel array, such as Figure 1 Please refer to Figure 1 As shown, the pixel array includes a plurality of pixel units 10 regularly arranged in the row direction and the column direction, and a microlens 20 is arranged on the pixel unit 10, wherein the pixel unit 10 includes an image pixel unit 11 for collecting image information and a phase pixel unit 12 for collecting phase information for focusing, and a microlens 20 is arranged on each of the image pixel units 11, and four adjacent phase pixel units 12 (i.e., 2×2) share one microlens 20. Therefore, the pixel array is represented as 2×2 MLPD (here, MLPD represents a microlens for phase focusing) and 1×1 OCL (here OCL represents a normal microlens for image display).

[0006] Regarding 1×1 OCL, although the non-MLPD area (area where MLPD is not set, such as Figure 1The image of the area except area 30 in the full-size mode is better than that of 2×2 OCL in full-size mode, but for small pixels, it still needs QSC (Quad Sensitivity Correction) and linear compensation. In addition, there are also some disadvantages for 1×1 OCL, such as: 1) MLPD area ( Figure 1 1) The image at area 30 in the image is worse due to the lost 4 pixel values, and PDC (PDpixel correction) is needed to compensate for the lost pixels and the surrounding pixels; 2) In 4C binning mode, the sensitivity and quantum efficiency are both small, and the SNR10 (signal-to-noise ratio) is about 7% worse; 3) PDC and PDF (PD pixel fix) need to be used simultaneously, and the chip size will increase.

[0007] Figure 2 This is a schematic diagram of the pixel array of 2×2 MLPD and 2×2 OCL. Please refer to Figure 2 As shown, 2×2 image pixel units 11 share a microlens 20, and 2×2 phase pixel units 12 share a microlens 20. The pixel arrays of 2×2 MLPD and 2×2 OCL are in the MLPD area (i.e. Figure 2 The area 30 in the figure has similar performance to the 2×2 MLPD and 1×1 OCL pixel arrays, and also has similar disadvantages. Summary of the invention

[0008] The object of the present invention is to provide an image sensor pixel array and an image sensor, so that there is no lost pixel in the area where the phase pixel unit is located, so that the image quality of the image sensor is better and no PDC is required.

[0009] In order to solve the above technical problems, according to a first aspect of the present invention, an image sensor pixel array is provided, comprising:

[0010] A plurality of pixel units regularly arranged along the row direction and the column direction, wherein the pixel units include image pixel units and phase pixel units, wherein the image pixel units are used to collect image information, and the phase pixel units are used to collect phase information for focusing;

[0011] A microlens is arranged on the pixel unit, a plurality of the image pixel units share one microlens, a plurality of the phase pixel units share one microlens, and the number of pixel units sharing the microlens is the same; the plurality of phase pixel units sharing one microlens constitute a first phase pixel unit group or a second phase pixel unit group, the first phase pixel unit group and the second phase pixel unit group are located in different rows and the same column, and the first phase pixel unit group and the second phase pixel unit group constitute a phase pixel unit pair to obtain a phase difference.

[0012] Optionally, 2×2 image pixel units share one microlens, and 2×2 phase pixel units share one microlens.

[0013] Optionally, two phase pixel units in the first column or the second column of the first phase pixel unit group are used to obtain the phase, and two phase pixel units in the second column or the first column of the second phase pixel unit group are used to obtain the phase.

[0014] Optionally, a color filter is further arranged between the pixel unit and the microlens, and 2×2 pixel units share a color filter of one color and also share one microlens.

[0015] Optionally, when 2×2 pixel units sharing one microlens are combined and read out in a one-pixel mode, the TX control signals of the two phase pixel units in the first column of the first phase pixel unit group are different from the TX control signals of the remaining image pixel units in the same row, and the TX control signals of the two phase pixel units in the second column of the second phase pixel unit group are different from the TX control signals of the remaining image pixel units in the same row.

[0016] Optionally, when each of the pixel units is read out in a one-pixel mode, the TX control signals of the two phase pixel units in the first column of the first phase pixel unit group are the same as the TX control signals of the remaining image pixel units in the same row, and the TX control signals of the two phase pixel units in the second column of the second phase pixel unit group are the same as the TX control signals of the remaining image pixel units in the same row.

[0017] Optionally, in the column direction, a plurality of phase pixel unit pairs are arranged at intervals, and in the row direction, a plurality of phase pixel unit groups are arranged at intervals.

[0018] Optionally, the pixel array includes a plurality of repeating units repeatedly arranged along the row direction and the column direction, and within the repeating units, the phase pixel unit groups are arranged on adjacent columns, and the phase pixel unit groups are located in different rows.

[0019] Optionally, the pixel array includes a plurality of repeating units repeatedly arranged along the row direction and the column direction, and within the repeating units, the phase pixel unit pairs are arranged on adjacent rows, and the phase pixel unit pairs are located in different columns.

[0020] In order to solve the above technical problem, according to a second aspect of the present invention, an image sensor is further provided, comprising the image sensor pixel array as described above.

[0021] In summary, in the image sensor pixel array and image sensor provided by the present invention, a plurality of the image pixel units share one microlens, a plurality of the phase pixel units share one microlens, and the number of pixel units sharing the microlens is the same; the plurality of the phase pixel units sharing one microlens constitute a first phase pixel unit group or a second phase pixel unit group, the first phase pixel unit group and the second phase pixel unit group are located in different rows and the same column, and the first phase pixel unit group and the second phase pixel unit group constitute a phase pixel unit pair to obtain a phase difference. In the present invention, the number of phase pixel units sharing the same microlens is the same as the number of image pixel units sharing the same microlens, so that all pixel units can use the same microlens, and there is no lost pixel value in the area where the phase pixel unit is located, so that the image quality of the image sensor is better, and no PDC is required. In addition, the first phase pixel unit group and the second phase pixel unit group are arranged in different rows, and can be read out without additional readout timing, and no additional readout time is required.

[0022] In addition, in 4C Binning mode, only PDF is required, which makes the chip size smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the pixel array of 2×2 MLPD and 1×1 OCL.

[0024] Figure 2 It is a schematic diagram of the pixel array of 2×2 MLPD and 2×2 OCL.

[0025] Figure 3 Schematic diagram of an image sensor pixel array provided by an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the distribution of TX control signals of an image sensor pixel array provided by an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the distribution of phase pixel units in an image sensor pixel array provided by an embodiment of the present invention.

[0028] Figure 6Schematic diagram of the distribution of phase pixel units in an image sensor pixel array provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0030] As used in the present invention, the singular forms "one", "an" and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features, unless the content clearly indicates otherwise.

[0031] Figure 3 is a schematic diagram of an image sensor pixel array provided by an embodiment of the present invention. Figure 3 As shown, the image sensor pixel array provided by the embodiment of the present invention includes:

[0032] A plurality of pixel units 10 are regularly arranged along the row direction and the column direction, wherein the pixel unit 10 comprises an image pixel unit 11 and a phase pixel unit 12, wherein the image pixel unit 11 is used to collect image information, and the phase pixel unit 12 is used to collect phase information for focusing;

[0033] A microlens 20 is arranged on the pixel unit 10, a plurality of the image pixel units 11 share one microlens 20, a plurality of the phase pixel units 12 share one microlens 20, and the number of the pixel units 10 sharing the microlens 20 is the same; the plurality of the phase pixel units 12 sharing one microlens 20 constitute a first phase pixel unit group 121 or a second phase pixel unit group 122, the first phase pixel unit group 121 and the second phase pixel unit group 122 are located in different rows and the same column, and the first phase pixel unit group 121 and the second phase pixel unit group 122 constitute a phase pixel unit pair 120 to obtain a phase difference.

[0034] If the number of pixel units 10 sharing the microlens 20 is the same, the same microlens 20 can be used, and there is no lost pixel value in the area where the phase pixel unit 12 is located, thereby making the image quality of the image sensor better and not requiring PDC.

[0035] In one embodiment of the present invention, 2×2 image pixel units 11 share one microlens 20, and 2×2 phase pixel units 12 share one microlens 20. The pixel array of the image sensor is 2×2 MLPD and 2×2 OCL. Of course, it is not limited to this.

[0036] In one embodiment of the present invention, a color filter is further provided between the pixel unit 10 and the microlens 20, so that the pixel unit 10 has different colors. In this embodiment, 2×2 pixel units 10 share a color filter of one color and also share one microlens 20. Figure 3 As shown, each 2×2 pixel units 10 have the same color and share one microlens 20. In this embodiment, the pixel unit 10 includes four colors, namely R, Gr, Gb and B, wherein Gr and R are arranged alternately in the same row, and B and Gb are arranged alternately in the next row, and the two rows are arranged repeatedly in sequence. In this embodiment, the phase pixel unit 12 is disposed in the pixel unit 10 where Gb is located, but is not limited thereto.

[0037] In one embodiment of the present invention, the two phase pixel units 12 in the first column of the first phase pixel unit group 121 are used to obtain the phase, and the two phase pixel units 12 in the second column of the second phase pixel unit group 122 are used to obtain the phase. Autofocus is achieved by the phase difference between the first phase pixel unit group 121 and the second phase pixel unit group 122. In addition, the first phase pixel unit group 121 and the second phase pixel unit group 122 are located in different rows and the same column, and can be read out without additional readout timing, without additional readout time. It is understandable that in another embodiment of the present invention, the two phase pixel units 12 in the second column of the first phase pixel unit group 121 can also be used to obtain the phase, and the two phase pixel units 12 in the first column of the second phase pixel unit group 122 can be used to obtain the phase. In another embodiment of the present invention, the two phase pixel units 12 in the first row of the first phase pixel unit group 121 may be used to obtain the phase, and the two phase pixel units 12 in the second row of the second phase pixel unit group 122 may be used to obtain the phase, so as to achieve autofocus through the phase difference between the first phase pixel unit group 121 and the second phase pixel unit group 122. The present invention is not limited to this.

[0038] In one embodiment of the present invention, when the 2×2 pixel units 10 that share one microlens are combined and read out in a one-pixel mode, that is, in the 4C Binning mode, the TX control signals of the two phase pixel units 12 in the first column of the first phase pixel unit group 121 are different from the TX control signals of the remaining image pixel units 11 in the same row, and the TX control signals of the two phase pixel units 12 in the second column of the second phase pixel unit group 122 are different from the TX control signals of the remaining image pixel units 11 in the same row.

[0039] Figure 4 FIG. 1 is a schematic diagram showing the distribution of TX control signals of an image sensor pixel array provided by an embodiment of the present invention. Figure 3 and Figure 4As shown, in the 4C Binning mode, the TX control signals of the four image pixel units 11 of Gb and B in the same row are 1, 2, 3, and 4 respectively, and the TX control signals of the four image pixel units 11 of R and Gr in the same row are 5, 6, 7, and 8 respectively, and in the area where the first phase pixel unit group 121 is located, the TX control signals of the two phase pixel units 12 on the left are 9 and 10 respectively, which are different from the TX control signals of the image pixel units 11 in the same row, while the TX control signals of the two phase pixel units 12 on the right are 1 and 3 respectively, which are the same as the TX control signals of the image pixel units 11 in the same row. In the area where the second phase pixel unit group 122 is located, the TX control signals of the two phase pixel units 12 on the left are 2 and 4 respectively, which are the same as the TX control signals of the image pixel units 11 in the same row, while the TX control signals of the two phase pixel units 12 on the right are 9 and 10 respectively, which are different from the TX control signals of the image pixel units 11 in the same row.

[0040] In one embodiment of the present invention, when each of the pixel units 10 is read out in a one-pixel mode, for example in a full-size mode, the TX control signal obtained by the two phase pixel units 12 in the first column of the first phase pixel unit group 121 is the same as the TX control signal of the remaining image pixel units 11 in the same row, and the TX control signal of the two phase pixel units 12 in the second column of the second phase pixel unit group 122 is the same as the TX control signal of the remaining image pixel units 11 in the same row.

[0041] Please refer to Figure 3 and Figure 4 As shown, in the full-size mode, the TX control signals of the four image pixel units 11 of Gb and B in the same row are 1, 2, 3, and 4, respectively, and the TX control signals of the four image pixel units 11 of R and Gr in the same row are 5, 6, 7, and 8, respectively. In the area where the first phase pixel unit group 121 is located, the TX control signals of the two phase pixel units 12 on the left are 2 and 4, respectively, which are the same as the TX control signals of the image pixel units 11 in the same row, while the TX control signals of the two phase pixel units 12 on the right are 1 and 3, respectively, which are the same as the TX control signals of the image pixel units 11 in the same row. In the area where the second phase pixel unit group 122 is located, the TX control signals of the two phase pixel units 12 on the left are 2 and 4, respectively, which are the same as the TX control signals of the image pixel units 11 in the same row, while the TX control signals of the two phase pixel units 12 on the right are 1 and 3, respectively, which are the same as the TX control signals of the image pixel units 11 in the same row.

[0042] The image sensor pixel array provided in this embodiment is compatible with the 4C Binning mode and the full-size mode without any additional readout timing. Moreover, in the 4C Binning mode, only PDF is required, thereby making the chip size smaller.

[0043] In one embodiment of the present invention, in the column direction, a plurality of phase pixel unit pairs 120 are arranged at intervals, and in the row direction, a plurality of phase pixel unit groups are arranged at intervals. For example: in the column direction, first, the first phase pixel unit group 121 and the second phase pixel unit group 122 are arranged at intervals to form a phase pixel unit pair 120, and then another group of the first phase pixel unit group 121 and the second phase pixel unit group 122 arranged at the same interval form another phase pixel unit pair 120, and so on, a plurality of the phase pixel unit pairs 120 are arranged at intervals. Alternatively, in the column direction, first, the first phase pixel unit group 121 and the second phase pixel unit group 122 are arranged at intervals to form a phase pixel unit pair 120, and then another group of the second phase pixel unit group 122 and the first phase pixel unit group 121 arranged at the same interval form another phase pixel unit pair 120, and then the third group of the first phase pixel unit group 121 and the second phase pixel unit group 122 are arranged at intervals to form a third phase pixel unit pair 120, and so on, a plurality of the phase pixel unit pairs 120 are arranged at intervals.

[0044] In the row direction, in the same row, a plurality of first-phase pixel unit groups 121 are arranged at intervals, or a plurality of second-phase pixel unit groups 122 are arranged at intervals.

[0045] Figure 5 Schematic diagram of the distribution of phase pixel units in an image sensor pixel array provided by an embodiment of the present invention. Figure 6 The present invention provides another embodiment of the present invention. The image sensor pixel array includes a plurality of repeating units repeatedly arranged along the row direction and the column direction, and the repeating unit includes a plurality of pixel units regularly arranged along the row direction and the column direction, thereby forming a pixel array. Figure 5 and Figure 6 Only one repeating unit in the image sensor pixel array is shown.

[0046] In one embodiment of the present invention, in the repeating unit, the phase pixel unit pairs are arranged in adjacent rows, and the phase pixel unit pairs are located in different columns. Figure 5As shown, for the rows provided with phase pixel units, the first row is the first phase pixel unit group 121, the second row is the second phase pixel unit group 122, the first row of the first phase pixel unit group 121 and the second row of the second phase pixel unit group 122 together form a row of phase pixel unit pairs 120 (set as the first row), the third row is the second phase pixel unit group 122, the fourth row is the first phase pixel unit group 121, the third row of the second phase pixel unit group 122 and the fourth row of the first phase pixel unit group 121 together form a row of phase pixel unit pairs 120 (set as the second row), and the two adjacent rows of phase pixel unit pairs 120 are located in different columns. This is equivalent to translating the second row of the phase pixel unit pairs 120 to the left or right (right in the embodiment) by 2 pixel units (it should be noted that in this embodiment, four pixel units are taken as a whole pixel unit as an example for description).

[0047] Table 1

[0048] 2×2OCL PD density Lost Pixels Full size mode Less than or equal to 25% 0％ 4C Binning Model 8 / 256＝3％ 8 / 256＝3％

[0049] Table 1 is Figure 5 The comparison of PD density (PD here refers to phase pixel unit) and lost pixels in different modes in the pixel array shown. As can be seen from Table 1, there are no lost pixels in the full-size mode, and there are only 3% lost pixels in the 4CBinning mode, which can make the image in the area where the phase pixel unit is located better and does not require PDC.

[0050] In one embodiment of the present invention, in the repeating unit, the phase pixel unit groups are arranged in adjacent columns, and the phase pixel unit groups are located in different rows. Figure 6 As shown, there are four columns provided with phase pixel units, and two adjacent columns, such as the first column and the second column, the phase pixel unit group in the second column and the phase pixel unit group in the first column are located in different rows, which is equivalent to moving the entire phase pixel unit in the second column upward by two pixel units (it should be noted that in this embodiment, four pixel units are also used as a whole for explanation), so that the phase pixel units are arranged in an interlaced manner in the pixel array. Of course, the position of one pixel unit can also be moved, and the third column can be moved upward by one pixel unit as a whole. Of course, the position of the phase pixel unit is not limited to this.

[0051] Table 2

[0052] 2×2OCL PD density Lost Pixels Full size mode Less than or equal to 25% 0％ 4C Binning Model 16 / 256＝6％ 16 / 256＝6％

[0053] Table 2 is Figure 6The comparison of PD density and lost pixels in different modes in the pixel array shown. As can be seen from Table 2, there are no lost pixels in the full-size mode, and only 6% of the lost pixels in the 4C Binning mode, which can make the image in the area where the phase pixel unit is located better and does not require PDC.

[0054] Above Figure 5 and Figure 6 In the two embodiments shown, one is the translation of adjacent phase pixel unit pairs in the column direction in the row direction, and the other is the translation of adjacent phase pixel unit groups in the row direction in the column direction. In other embodiments, the phase pixel unit groups may also be arranged in other ways known to those skilled in the art, and the present invention is not limited thereto.

[0055] In the image sensor pixel array provided by the present invention, a plurality of the image pixel units 11 share one microlens 20, a plurality of the phase pixel units 12 share one microlens 20, and the number of the pixel units 10 sharing the microlens 20 is the same; the plurality of the phase pixel units 12 sharing one microlens 20 constitute a first phase pixel unit group 121 or a second phase pixel unit group 122, the first phase pixel unit group 121 and the second phase pixel unit group 122 are located in different rows and the same column, and the first phase pixel unit group 121 and the second phase pixel unit group 122 constitute a phase pixel unit pair 120 to obtain a phase difference. In the present invention, the number of the phase pixel units 12 sharing the same microlens 20 is the same as the number of the image pixel units 11 sharing the same microlens 20, so that all the pixel units 10 can use the same microlens 20, and there is no lost pixel value in the area where the phase pixel unit 12 is located, so that the image quality of the image sensor is better, and no PDC is required. In addition, the first phase pixel unit group 121 and the second phase pixel unit group 122 are arranged in different rows and can be read out without additional readout timing, without requiring additional readout time.

[0056] In addition, in 4C Binning mode, only PDF is required, which makes the chip size smaller.

[0057] Correspondingly, the present invention also provides an image sensor, comprising the image sensor pixel array as described above.

[0058] In summary, in the image sensor pixel array and image sensor provided by the present invention, a plurality of the image pixel units share one microlens, a plurality of the phase pixel units share one microlens, and the number of pixel units sharing the microlens is the same; the plurality of the phase pixel units sharing one microlens constitute a first phase pixel unit group or a second phase pixel unit group, the first phase pixel unit group and the second phase pixel unit group are located in different rows and the same column, and the first phase pixel unit group and the second phase pixel unit group constitute a phase pixel unit pair to obtain a phase difference. In the present invention, the number of phase pixel units sharing the same microlens is the same as the number of image pixel units sharing the same microlens, so that all pixel units can use the same microlens, and there is no lost pixel value in the area where the phase pixel unit is located, so that the image quality of the image sensor is better, and no PDC is required. In addition, the first phase pixel unit group and the second phase pixel unit group are arranged in different rows, and can be read out without additional readout timing, and no additional readout time is required.

[0059] In addition, in 4C Binning mode, only PDF is required, which makes the chip size smaller.

[0060] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An image sensor pixel array, characterized in that: include: A plurality of pixel units regularly arranged along the row direction and the column direction, wherein the pixel units include image pixel units and phase pixel units, wherein the image pixel units are used to collect image information, and the phase pixel units are used to collect phase information for focusing; A microlens is arranged on the pixel unit, 2×2 image pixel units share one microlens, 2×2 phase pixel units share one microlens, and the number of pixel units sharing the microlens is the same; the multiple phase pixel units sharing one microlens constitute a first phase pixel unit group or a second phase pixel unit group, the first phase pixel unit group and the second phase pixel unit group are located in different rows and the same column, and the first phase pixel unit group and the second phase pixel unit group constitute a phase pixel unit pair to obtain a phase difference; wherein two phase pixel units in the first column or the second column of the first phase pixel unit group are used to obtain the phase, and two phase pixel units in the second column or the first column of the second phase pixel unit group are used to obtain the phase.

2. The image sensor pixel array according to claim 1, characterized in that: A color filter is also arranged between the pixel unit and the microlens, and 2×2 pixel units share a color filter of one color and also share one microlens.

3. The image sensor pixel array according to claim 2, characterized in that: When the 2×2 pixel units that share one microlens are combined and read out in a one-pixel mode, the TX control signals of the two phase pixel units in the first column of the first phase pixel unit group are different from the TX control signals of the remaining image pixel units in the same row, and the TX control signals of the two phase pixel units in the second column of the second phase pixel unit group are different from the TX control signals of the remaining image pixel units in the same row.

4. The image sensor pixel array according to claim 2, characterized in that: When each of the pixel units is read out in a one-pixel mode, the TX control signals of the two phase pixel units in the first column of the first phase pixel unit group are the same as the TX control signals of the remaining image pixel units in the same row, and the TX control signals of the two phase pixel units in the second column of the second phase pixel unit group are the same as the TX control signals of the remaining image pixel units in the same row.

5. The image sensor pixel array according to claim 1, characterized in that: In the column direction, a plurality of phase pixel unit pairs are arranged at intervals, and in the row direction, a plurality of phase pixel unit groups are arranged at intervals.

6. The image sensor pixel array according to claim 5, characterized in that: The pixel array includes a plurality of repeating units repeatedly arranged along the row direction and the column direction. In the repeating units, the phase pixel unit groups are arranged on adjacent columns, and the phase pixel unit groups are located in different rows.

7. The image sensor pixel array according to claim 5, characterized in that: The pixel array includes a plurality of repeating units repeatedly arranged along the row direction and the column direction. In the repeating units, the phase pixel unit pairs are arranged on adjacent rows, and the phase pixel unit pairs are located in different columns.

8. An image sensor, characterized in that: The invention comprises the image sensor pixel array as claimed in any one of claims 1 to 7.

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