Optical sensor module, electronic equipment and vehicle

Abstract

The embodiment of the invention provides an optical sensor module, electronic equipment and a vehicle, relates to the technical field of optical sensing, and aims to isolate visible light and infrared light in the optical sensor module so as to improve color cast and further support optical sensors corresponding to visible light wave bands and infrared light wave bands to work at the same time. The optical sensor module comprises an optical sensor array layer, a filter layer and a micro lens layer, and the filter layer is located between the optical sensor array layer and the lens layer; the filter layer comprises a color filter array and an infrared cut-off layer; at least part of the color filter array and the infrared cut-off layer are arranged in a stacked mode. The color filter array comprises a visible light part and an infrared part; the infrared cut-off layer comprises an effective area; the effective area of the infrared cut-off layer is overlapped with the visible light part of the color filter array, the effective area of the infrared cut-off layer is not overlapped with at least part of the infrared part of the color filter array, and the effective area of the infrared cut-off layer can cut off infrared light.

Description

Technical Field

[0001] The present application relates to the field of optical sensing technology, and in particular to an optical sensor module, an electronic device and a vehicle. Background Art

[0002] Traditional cameras have three visible light channels, RGB, to achieve visible light imaging. On this basis, after replacing some of the RGB channels with infrared (IR) channels, the perception of the visible light band and the near-infrared band is achieved. Among them, the IR channel can be used for imaging infrared light, or the IR channel can be used to measure distance by detecting infrared light. Currently, cameras with both RGB channels and IR channels are set as follows Figure 1 The dual-bandpass filters shown correspond to the visible light band and the infrared band. Both visible light and infrared light can pass through the filters and enter the sensor. However, infrared light will cause color shift in the sensor imaging corresponding to the RGB channels. Summary of the invention

[0003] In view of this, the present application provides an optical sensor module, an electronic device and a vehicle, which can isolate the visible light and infrared light in the optical sensor module, thereby improving color deviation.

[0004] In a first aspect, an embodiment of the present application provides an optical sensor module, comprising: an optical sensor array layer, a filter layer and a lens layer, the filter layer being located between the optical sensor array layer and the lens layer; the filter layer comprising a color filter array and an infrared cutoff layer; at least a portion of the color filter array and the infrared cutoff layer are stacked; the color filter array comprises a visible light portion and an infrared portion; the visible light portion allows visible light to pass, and the infrared portion can partially or completely cut off visible light and allow infrared light to pass; the infrared cutoff layer comprises an effective area; the effective area of ​​the infrared cutoff layer overlaps with the visible light portion of the color filter array, and the effective area of ​​the infrared cutoff layer does not overlap with at least a portion of the infrared portion of the color filter array, wherein the effective area of ​​the infrared cutoff layer can cut off infrared light.

[0005] Since the effective area of ​​the infrared cutoff layer overlaps with the visible light part of the color filter array, the infrared cutoff layer can filter out the light in the infrared band corresponding to the RGB channels. In this way, the optical sensor corresponding to the RGB channels receives the visible light after filtering out the infrared light, thereby achieving the isolation of visible light and infrared light, that is, avoiding the adverse effects of infrared light on the optical sensors of the RGB channels, avoiding the color deviation problem of the traditional RGBIR camera, and thus supporting the optical sensors corresponding to the visible light band and the infrared light band to work simultaneously. In addition, since the effective area of ​​the infrared cutoff layer does not overlap with at least part of the infrared part of the color filter array, the adverse effects of the infrared cutoff layer on the optical sensor corresponding to the IR channel acquiring infrared light are reduced.

[0006] In a possible implementation, the filter layer further includes an infrared bandpass layer, and the infrared bandpass layer, the infrared cutoff layer and the color filter array are stacked; the infrared bandpass layer includes an effective area, the effective area of ​​the infrared bandpass layer overlaps with the infrared part of the color filter array, the effective area of ​​the infrared bandpass layer does not overlap with at least part of the visible light part of the color filter array, the effective area of ​​the infrared bandpass layer can cut off the visible light and allow the infrared light to pass, and the passband bandwidth of the infrared light in the effective area of ​​the infrared bandpass layer is smaller than the passband bandwidth in the infrared part of the color filter array. The infrared bandpass effect of the IR channel is improved by the infrared bandpass layer, and the adverse effects of the infrared bandpass layer on the optical sensors corresponding to the RGB channels are reduced, further improving the isolation effect of light of different wavelength bands between the RGB channel and the IR channel.

[0007] In a possible implementation, the infrared cutoff layer further includes an invalid area, and the invalid area of ​​the infrared cutoff layer can pass infrared light; the infrared bandpass layer further includes an invalid area, and the invalid area of ​​the infrared bandpass layer can pass visible light; the invalid area of ​​the infrared cutoff layer overlaps with the infrared part of the color filter array; the invalid area of ​​the infrared bandpass layer overlaps with the visible light part of the color filter array; the invalid area of ​​the infrared cutoff layer and the invalid area of ​​the infrared bandpass layer are filled with transparent materials. The infrared cutoff layer and the infrared bandpass layer are made as two layers, which is relatively simple in terms of process.

[0008] In a possible implementation, the effective area of ​​the infrared cutoff layer covers the visible light portion of the color filter array in the projection area of ​​the plane where the color filter array is located; the effective area of ​​the infrared bandpass layer is located within the infrared portion of the color filter array in the projection area of ​​the plane where the color filter array is located. The edge portions of the infrared cutoff layer and the infrared bandpass layer are arranged to be located in the IR channel to reduce the adverse effects of the edge portions on the RGB channels, thereby ensuring the photosensitivity efficiency of the optical sensors of the RGB channels.

[0009] In a possible embodiment, in a possible embodiment, the infrared cutoff layer is located between the lens layer and the color filter array; a first filling layer is arranged between the optical sensor array layer and the color filter array; a second filling layer is arranged between the infrared cutoff layer and the color filter array; and a third filling layer is arranged between the infrared cutoff layer and the lens layer.

[0010] In a possible implementation, the filter layer further includes an infrared bandpass layer, and the infrared cutoff layer and the infrared bandpass layer are located in the same layer; the infrared bandpass layer overlaps with the infrared portion of the color filter array, and the infrared bandpass layer does not overlap with at least part of the visible light portion of the color filter array, and the infrared bandpass layer can cut off visible light and allow infrared light to pass, and the passband width of infrared light in the infrared bandpass layer is smaller than the passband width in the infrared portion of the color filter array. The infrared cutoff layer and the infrared bandpass layer are made in the same layer, which can reduce the overall thickness of the structure.

[0011] In a possible implementation, the thickness of the infrared portion is greater than the thickness of the visible light portion, so as to improve the optical properties of the infrared portion.

[0012] In one possible implementation, the central wavelength of the infrared portion is between 800nm ​​and 1000nm, and has a passband bandwidth of 10nm to 50nm, which reduces the half-width of the infrared portion, even if the infrared portion has a narrower bandwidth, so as to reduce ambient light interference and improve the signal-to-noise ratio.

[0013] In a possible implementation, the optical sensor array layer includes a first optical sensor overlapping with the visible light portion of the color filter array; the optical sensor array layer also includes a second optical sensor overlapping with the infrared portion of the color filter array; the projection of the infrared portion on the plane where the second optical sensor is located is located within the second optical sensor. The edge portion of the infrared portion is arranged to be located in the IR channel to reduce the adverse effect of the edge portion on the RGB channel, so as to ensure the photosensitivity efficiency of the optical sensor of the RGB channel.

[0014] In a possible implementation, the visible portion is made of an organic material, and the effective area of ​​the infrared cutoff layer is made of an inorganic material.

[0015] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the above-mentioned optical sensor module.

[0016] In a third aspect, an embodiment of the present application further provides a vehicle, comprising the above-mentioned electronic device.

[0017] In a fourth aspect, an embodiment of the present application also provides a method for preparing an optical sensor module, comprising: preparing a color filter array on the surface of a substrate including an optical sensor array layer, the color filter array including a visible light part and an infrared part; coating a filling layer on the surface of the color filter array; coating an infrared bandpass layer material on the surface of the filling layer, and opening the infrared bandpass layer above the visible light part; filling a transparent material in the opening area of ​​the infrared bandpass layer; coating an infrared cutoff layer material on the surface of the infrared bandpass layer, and opening the infrared cutoff layer above the infrared part; and filling a transparent material in the opening area of ​​the infrared cutoff layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 Schematic diagram of transmittance of a dual-bandpass filter in the related art;

[0020] Figure 2 It is a structural schematic diagram of a camera in the related art;

[0021] Figure 3 It is a schematic diagram of the transmittance curve of the filter in the related art at different incident angles in the infrared band;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of an optical sensor module in an embodiment of the present application;

[0023] Figure 5 A top view of an optical sensor array layer in an embodiment of the present application;

[0024] Figure 6 is a top view of a color filter array in an embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of an infrared cutoff layer in an embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of an infrared bandpass layer in an embodiment of the present application;

[0027] Fig. 9 for Figure 6 Color filter array, Figure 7 Mid-infrared cut-off layer and Figure 8 Schematic diagram of the mid-infrared bandpass layers after superposition;

[0028] Fig.10 for Figure 6 Schematic diagram of transmittance curves of different parts of the color filter array;

[0029] Fig.11 It is a schematic diagram of the transmittance curve after the infrared cut-off layer and the infrared bandpass layer are superimposed in the embodiment of the present application;

[0030] Fig.12 for Figure 6 Color filter array, Figure 7 Mid-infrared cut-off layer and Figure 8 Schematic diagram of the transmittance curve corresponding to the superposition of mid-infrared bandpass layers;

[0031] Fig.13 This is a schematic cross-sectional structure diagram of another optical sensor module in an embodiment of the present application;

[0032] Fig.14 FIG. 4 is a schematic diagram of the cross-sectional structure of another optical sensor module in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0034] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0036] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] Before describing the embodiments of the present application, the related technologies and technical problems will be described first. A camera using dual-bandpass filters for visible light and infrared light can be used in conjunction with an infrared light emitter, and can sense light in both the RGB channel and the IR channel at the same time. Among them, the light sensing in the RGB channel can be used for imaging of visible light; the light sensing in the IR channel can be used for imaging at night to achieve nighttime monitoring, and can also be used to achieve ranging. However, when the camera senses light in both the RGB channel and the IR channel at the same time, on the one hand, the infrared light will cause color deviation in the imaging of the sensor corresponding to the RGB channel, and on the other hand, the visible light will reduce the signal-to-noise ratio of the sensor corresponding to the IR channel, thereby adversely affecting the ranging results.

[0038] In addition, if Figure 2 and Figure 3 As shown, in the related art, the camera includes an optical sensor array layer 01, a color filter array 02 (Color Filter Array, CFA), a lens layer 03 and a dual-bandpass filter 04. Since the medium has different light refraction effects at different incident angles, the transmittance curve of the dual-bandpass filter 04 for light at different incident angles (angle of incident, AOI) will shift. Therefore, in order to ensure that light in the expected band can be transmitted, it is necessary to increase the bandwidth of the dual-bandpass filter 04 to ensure that the actively emitted infrared light and the required visible light can be received. However, the increase in the overall bandwidth of the dual-bandpass filter 04 will also bring light in unnecessary bands. Therefore, increasing the bandwidth of the dual-bandpass filter 04 will increase light interference and reduce the signal-to-noise ratio.

[0039] The technical solution of the embodiment of the present application is described below.

[0040] like Figure 4As shown, an embodiment of the present application provides an optical sensor module, including: an optical sensor array layer 1, a filter layer 2 and a lens layer 3, wherein the filter layer 2 is located between the optical sensor array layer 1 and the lens layer 3; the filter layer 2 includes a color filter array 21 and an infrared cutoff (IRC) layer 22, and the filter layer 2 may also include an infrared bandpass layer (IRP) 23 stacked with the color filter array 21, and at least a portion of the color filter array 21 is stacked with the infrared cutoff layer 22; the color filter array 21 includes a visible light portion and an infrared portion IR, wherein the visible light portion allows visible light to pass, and the infrared portion IR can partially or completely cut off visible light to allow infrared light to pass; the visible light portion includes a red light portion R, a green light portion G and a blue light portion B; the infrared cutoff layer 22 has an effective area 221, and the effective area 221 of the infrared cutoff layer 22 overlaps with the red light portion R, the green light portion G and the blue light portion B of the color filter array 21. The effective area 221 of the infrared cut-off layer 22 does not overlap at least part of the infrared portion IR of the color filter array 21 , wherein the effective area 221 of the infrared cut-off layer 22 can cut off infrared light.

[0041] Specifically, Figure 4 and Figure 5 As shown, the optical sensor array layer 1 includes a plurality of optical sensors 10 arranged in an array. The embodiment of the present application does not limit the specific type of the optical sensor 10. For example, the optical sensor 10 may be a complementary metal oxide semiconductor image sensor (CIS). The optical sensors 10 corresponding to the red light portion R, the green light portion G and the blue light portion B are filled with white in the figure, and are used to obtain visible light and perform photoelectric conversion on the visible light. The optical sensors 10 corresponding to the infrared portion IR are filled with dots in the figure, and are used to obtain infrared light and perform photoelectric conversion on the infrared light. The red light portion R, the green light portion G and the blue light portion B correspond to the RGB channels of the visible light, and the infrared portion IR corresponds to the IR channel of the infrared light. The optical sensors 10 corresponding to the RGB channels and the IR channels may be the same optical sensors, or they may be optical sensors having different functions according to the different wavelength bands of the acquired light. For example, the optical sensors 10 corresponding to the RGB channels may only have the photoelectric conversion function of the visible light band, and the optical sensors 10 corresponding to the IR channels may only have the photoelectric conversion function of the infrared light band. As Figure 4 and Figure 6As shown, the red light portion R of the color filter array 21 is used to transmit red light, the green light portion G is used to transmit green light, the blue light portion B is used to transmit blue light, and the infrared portion IR is used to transmit light in the infrared band. The color filter array 21 can be made of organic materials, such as ink. Due to the limitations of the ink material, the RGB channels have a high transmittance in the IR band in addition to the visible light band. Therefore, in the embodiment of the present application, an infrared cutoff layer 22 corresponding to the RGB channels is provided. Figure 4 and Figure 7 As shown, the effective area 221 of the infrared cut-off layer 22 is used to cut off infrared light. The lens layer 3 may be a micro lens, and the function of the lens layer 3 is to converge light so that each optical sensor 10 in the array can obtain light more effectively.

[0042] It should be noted that the positions and arrangements of the RGB channels and IR channels shown in the above figures are only examples, and are not limited in the present application. Figure 6 The arrangement of the RGB channels in the color filter array 21 shown in FIG. 1 is a Bayer arrangement, and part of the RGB channels in the Bayer arrangement is replaced by the IR channel, that is, Figure 6 In other possible implementations, the number of IR channels may be more or less, and the positions of the arrangement may also be changed, for example, the IR channels may be arranged in a whole row or a whole column.

[0043] In the optical sensor module of the embodiment of the present application, since the effective area of ​​the infrared cutoff layer overlaps with the visible light part of the color filter array, the infrared cutoff layer can filter out the light in the infrared band corresponding to the RGB channels. In this way, what is received by the optical sensors corresponding to the RGB channels is the visible light after the infrared light is filtered out, thereby achieving the isolation of visible light and infrared light, that is, avoiding the adverse effects of infrared light on the optical sensors of the RGB channels, avoiding the color deviation problem of the traditional RGBIR camera, and thus supporting the optical sensors corresponding to the visible light band and the infrared light band to work simultaneously. In addition, since the effective area of ​​the infrared cutoff layer does not overlap with at least part of the infrared part of the color filter array, the adverse effects of the infrared cutoff layer on the optical sensor corresponding to the IR channel acquiring infrared light are reduced.

[0044] In some embodiments, Figure 4 , Figure 8 and Fig. 9As shown, the filter layer 2 also includes an infrared bandpass layer 23 stacked with the color filter array 21; the effective area 231 of the infrared bandpass layer 23 overlaps with the infrared part IR of the color filter array 21, and the effective area 231 of the infrared bandpass layer 23 does not overlap with at least part of the visible light part of the color filter array 21. The infrared part IR of the color filter array 21 and the effective area 231 of the infrared bandpass layer 23 can both cut off the visible light and allow the infrared light to pass through. The passband width of the infrared light in the effective area 231 of the infrared bandpass layer 23 is smaller than the passband width in the infrared part IR of the color filter array 21.

[0045] Specifically, the function of the infrared portion IR of the color filter array 21 is similar to that of the effective area 231 of the infrared bandpass layer 23, except that the effective area 231 of the infrared bandpass layer 23 has a narrower bandpass than the infrared portion IR. Since the effective area 231 of the infrared bandpass layer 23 overlaps with the infrared portion IR of the color filter array 21, the two work together to achieve narrowband transmission of the IR channel, thereby further reducing the adverse effects of RGB light on the IR channel, improving the signal-to-noise ratio of the IR channel, and improving the accuracy of distance measurement. Fig. 9 As shown, Fig. 9 This is a schematic diagram of the overlap of the color filter array 21, the infrared cutoff layer 22, and the infrared bandpass layer 23 in the embodiment of the present application. Due to the infrared cutoff effect of the infrared cutoff layer 22 on the RGB channel, and the visible light cutoff effect of the infrared bandpass layer 23 on the IR channel, the visible light is isolated from the IR channel, and the infrared light is isolated from the RGB channel. The interference of visible light on the optical sensor 10 of the IR channel is reduced, and the interference of infrared light on the optical sensor 10 of the RGB channel is reduced.

[0046] In addition, since the infrared bandpass layer 23 is located between the lens layer 3 and the optical sensor array layer 1, the focusing effect of the lens will reduce the incident angle of the infrared bandpass layer 23, so that the effective area 231 of the infrared bandpass layer 23 can be designed with a narrower bandwidth.

[0047] In some embodiments, the infrared cut-off layer 22 further includes an invalid area 222, and the invalid area 222 of the infrared cut-off layer 22 can pass infrared light, that is, the invalid area 222 does not have the function of cutting off infrared light, and the invalid area 222 can be, for example, a hollow structure of the infrared cut-off layer 22; the infrared bandpass layer 23 further includes an invalid area 232, and the invalid area 232 of the infrared bandpass layer 23 can pass visible light, that is, the invalid area 232 of the infrared bandpass layer 23 does not have the function of cutting off visible light and passing infrared light, and the invalid area 232 can be, for example, a hollow structure of the infrared bandpass layer 23. The invalid area 222 of the infrared cut-off layer 22 overlaps with the infrared part IR of the color filter array 21; the invalid area 232 of the infrared bandpass layer 23 overlaps with the visible light part of the color filter array 21; the invalid area 222 of the infrared cut-off layer 22 and the invalid area 232 of the infrared bandpass layer 23 are hollow structures, and the hollow structures are filled with transparent materials. The ineffective area is a non-functional area, which is filled with transparent material to make the film layer as a whole relatively flat, facilitate process manufacturing, and not cause adverse effects on light.

[0048] In some embodiments, the transparent material is silicon dioxide, and the refractive index of silicon dioxide is similar to that of the adjacent film layer to avoid adverse effects on light.

[0049] The transmittance effect of the filter layer 2 in the embodiment of the present application is described below with reference to the transmittance curve. Fig.10 The four schematic curves in the figure are respectively the transmittance curve of the red light part R, the transmittance curve of the green light part G, the transmittance curve of the blue light part B and the transmittance curve of the infrared part IR in the color filter array 21. It can be seen that in the infrared part IR, there is actually a superimposed transmittance of visible light and infrared light. It can be seen that if the color filter array 21 is used alone, it will inevitably lead to the adverse effect of visible light on the optical sensor corresponding to the infrared part IR. Fig.11 IR-Cut is the transmittance curve of the effective area 221 of the infrared cut-off layer 22, and IR-Pass is the transmittance curve of the effective area 231 of the infrared passband layer 23. It can be seen that the effective area 221 of the infrared cut-off layer 22 can effectively cut off infrared light and transmit visible light, and the effective area 231 of the infrared passband layer 23 can effectively cut off visible light and transmit narrow-band infrared light. Fig.12: It is the transmittance curve corresponding to each channel after the color filter array 21, the infrared cutoff layer 22 and the infrared bandpass layer 23 are overlapped, R represents the transmittance curve corresponding to the red light part, G represents the transmittance curve corresponding to the gray-green light part, B represents the transmittance curve corresponding to the blue light part, IR represents the transmittance curve corresponding to the infrared part. It can be seen that after the color filter array 21, the infrared cutoff layer 22 and the infrared bandpass layer 23 are overlapped, the visible light part can only transmit visible light, and the infrared light is cut off, thereby avoiding the adverse effects of infrared light on the optical sensor corresponding to the visible light part; the infrared part IR can only transmit narrow-band infrared light, and the visible light is cut off, thereby avoiding the adverse effects of visible light on the optical sensor corresponding to the infrared part.

[0050] In some embodiments, Figure 4 and Fig. 9 As shown, Fig. 9 The dotted line range in the figure is the boundary position between the visible light part and the infrared part IR of the color filter array 21. The projection area of ​​the effective area 221 of the infrared cut-off layer 22 on the plane where the color filter array 21 is located covers the visible light part of the color filter array 21; the projection area of ​​the effective area 231 of the infrared bandpass layer 23 on the plane where the color filter array 21 is located is located within the infrared part IR of the color filter array 21. In order to ensure the light transmission efficiency of the RGB channels, in the embodiment of the present application, the boundary between the effective area and the invalid area in the infrared cut-off layer 22 is set within the IR channel range, and the boundary between the effective area and the invalid area of ​​the infrared bandpass layer 23 is set within the IR channel range. Since each pixel in the RGB channel corresponds to an optical sensor, the optical transmission efficiency of the RGB channel can be guaranteed as much as possible through this setting. The IR channel usually corresponds to multiple optical sensors, for example, the IR channel corresponds to 4 optical sensors. Therefore, although setting the film layer boundary within the IR channel range will sacrifice a little bit of the edge optical transmission effect of the IR channel, it will not cause too much impact on the photosensitivity of the optical sensor corresponding to the IR channel, thereby improving the photosensitivity efficiency of the optical sensor of the RGB channel.

[0051] In some embodiments, the ineffective area 222 of the infrared cut-off layer 22 and the ineffective area 232 of the infrared bandpass layer 23 can be made by a hole-opening process on the film layer. The hole-opening process requires etching or other processes on the film layer. At the edge of the hole, an inclined surface will be generated due to the process. In other words, the cross section of the boundary of the effective area 221 of the infrared cut-off layer 22 is an inclined surface, and the interface of the boundary of the effective area 231 of the infrared bandpass layer 23 is an inclined surface. The inclined surfaces of the infrared cut-off layer 22 and the infrared bandpass layer 23 overlap with the infrared part IR of the color filter array 21, that is, they are set within the IR channel range. Due to the change in the thickness of the inclined surface, the effect on the light is not ideal, so the inclined surface is set within the IR channel range to reduce the adverse effects of the inclined surface on the RGB channel and improve the photosensitivity efficiency of the optical sensor of the RGB channel.

[0052] In some embodiments, Figure 4 As shown, the infrared cut-off layer 22 is located between the lens layer 3 and the color filter array 21; a first fill-up layer 41 is provided between the optical sensor array layer 1 and the color filter array 21; a second fill-up layer 42 is provided between the infrared cut-off layer 22 and the color filter array 21. Figure 4 In the structure shown, an infrared bandpass layer 23 is further provided between the infrared cutoff layer 22 and the color filter array 21, so the second fill layer 42 is provided between the infrared bandpass layer 23 and the color filter array 21; and a third fill layer 43 is provided between the infrared cutoff layer 22 and the lens layer 3. Since the infrared bandpass layer 23 and the infrared cutoff layer 22 are added to the optical sensor module of the embodiment of the present application, more fill layers need to be added to ensure the process effect.

[0053] It should be noted that Figure 4 The positional relationship between the film layers between the optical sensor array layer 1 and the lens layer 3 shown in the figure is only an example, and the embodiments of the present application do not limit this. For the three film layers of the infrared cutoff layer 22, the infrared bandpass layer 23 and the color filter array 21, the function of each film layer is to filter light. Therefore, no matter what the order between the three layers is, the same filtering effect can be achieved after superposition. That is to say, in the embodiments of the present application, the positions of the three film layers of the infrared cutoff layer 22, the infrared bandpass layer 23 and the color filter array 21 can be arbitrarily exchanged. For example, the color filter array 21 can be located between the infrared cutoff layer 22 and the infrared bandpass layer 23, or the infrared cutoff layer 22 can be located between the color filter array 21 and the infrared bandpass layer 23, etc., as long as the infrared cutoff layer 22, the infrared bandpass layer 23 and the color filter array 21 are located between the optical sensor array layer 1 and the lens layer 3.

[0054] Below Figure 4The structure shown is taken as an example to illustrate the optical sensor module manufacturing process of the embodiment of the present application.

[0055] First, a color filter array 21 is prepared on the surface of a substrate including an optical sensor array layer 1. The color filter array 21 can be made of an organic material, such as ink. Before preparing the color filter array 21, a first fill layer 41 can be prepared on the surface of the optical sensor array layer 1, so that the color filter array 21 can be prepared on the flat surface of the first fill layer 41. After the color filter array 21 is prepared, a second fill layer 42 is plated on the surface of the color filter array 21 to ensure that the subsequent processes are prepared based on a flat surface in view of the difference in thickness of different types of film layers such as the red light part R, the green light part G, the blue light part B and the infrared part IR. Afterwards, the infrared bandpass layer 23 material is plated on the surface of the second filling layer 42, and the infrared bandpass layer 23 above the red light part R, the green light part G and the blue light part B is opened to remove the corresponding material. The opening area after the material is removed is the invalid area of ​​the infrared bandpass layer 23, and the area with the material is the effective area of ​​the infrared bandpass layer 23. Then, a transparent material is filled in the invalid area of ​​the infrared bandpass layer 23 for filling and leveling. The filled transparent material can be, for example, silicon dioxide. Afterwards, the infrared cutoff layer 22 material is plated on the surface of the infrared bandpass layer 23, and the infrared cutoff layer 22 above the infrared part IR is opened to remove the corresponding material. The opening area after the material is removed is the invalid area of ​​the infrared cutoff layer 22, and the area with the material is the effective area of ​​the infrared cutoff layer 22. Then, a transparent material is filled in the invalid area of ​​the infrared cutoff layer 22 for filling and leveling. The transparent materials filled in the invalid areas of the infrared cutoff layer 22 and the infrared bandpass layer 23 can be the same. Then, a third filling layer 43 is prepared on the surface of the infrared cutoff layer 22 , and a lens layer 3 is arranged on the surface of the third filling layer 43 .

[0056] exist Figure 4 In the structure shown, the infrared cut-off layer 22 and the infrared bandpass layer 23 are stacked structures, but in fact, the effective area of ​​the infrared cut-off layer 22 corresponds to the RGB channel, and the effective area of ​​the infrared bandpass layer 23 corresponds to the IR channel, and the two can also be non-stacked structures. Fig.13As shown, the filter layer 2 further includes an infrared bandpass layer 23, and the infrared cutoff layer 22 and the infrared bandpass layer 23 are located in the same layer. The infrared bandpass layer 23 overlaps with the infrared part IR of the color filter array 21, and the infrared bandpass layer 23 does not overlap with at least part of the visible light part of the color filter array 21. The infrared bandpass layer 23 can cut off the visible light and allow the infrared light to pass. The passband width of the infrared light in the infrared bandpass layer 23 is smaller than the passband width of the infrared part IR of the color filter array 21. Under this structure, the infrared cutoff layer 22 can still be used to cut off the infrared light of the RGB channels, and the infrared bandpass layer 23 can be used to cut off the visible light of the IR channel, and the overall film thickness is reduced.

[0057] In one embodiment, if Fig.14 As shown, the central wavelength of the infrared part IR is between 800nm ​​and 1000nm, and has a passband width of 10nm to 50nm. In other words, the half-width of the infrared part IR is reduced, so that the infrared part IR of the color filter array 21 itself has the characteristics of narrow bandpass. Under this structure, the infrared part IR itself can realize the function of infrared bandpass, and no additional infrared bandpass layer is required. It is only necessary to set the corresponding infrared cut-off layer 22 at the position of the RGB channel to cut off the light in the infrared band of the RGB channel. The infrared part IR under this structure can be made of inorganic materials.

[0058] In one embodiment, if Fig.14 As shown, the thickness of the infrared portion IR is greater than the thickness of any one of the red portion R, the green portion G, and the blue portion B. Relative to the RGB channels, the infrared portion IR can be made of organic materials to achieve a narrower bandpass characteristic, and organic materials may require a thicker film thickness relative to inorganic materials. Since the infrared portion IR is thicker and is parallel to the infrared cut-off layer 22, the second fill layer 42 in the structure is only located between the RGB portion of the color filter array 21 and the infrared cut-off layer 22.

[0059] In one embodiment, if Fig.14As shown, the optical sensor array layer 1 includes a first optical sensor overlapping with the red light part R, the green light part G and the blue light part B of the color filter array 21, that is, the first optical sensor overlaps with the visible light part, and the first optical sensor is an optical sensor 10 filled with white; the optical sensor array layer 1 also includes a second optical sensor overlapping with the infrared part IR of the color filter array 21, and the second optical sensor is an optical sensor 10 filled with dots; the projection of the infrared part IR on the plane where the corresponding second optical sensor is located is within the second optical sensor. Avoid the influence of the boundary of the infrared part IR on the RGB channel, so as to improve the photosensitivity efficiency of the optical sensor of the RGB channel. It should be noted that the photosensitivity range of the first optical sensor can only cover visible light, not infrared light, or can cover visible light and infrared light. The first optical sensor here is only used to illustrate that its purpose is to realize the sensing of visible light, rather than to limit its photosensitivity; similarly, the photosensitivity range of the second optical sensor can only cover infrared light, not visible light, or can cover visible light and infrared light. In other words, the first optical sensor and the second optical sensor can be the same sensor.

[0060] In one embodiment, the red light portion R, the green light portion G, and the blue light portion B are made of ink materials, and the effective area of ​​the infrared cutoff layer 22 is made of an inorganic material.

[0061] The embodiment of the present application also provides an electronic device, including an optical sensor module and an infrared light emitter of any of the above embodiments, the infrared light emitter is used to emit infrared light, so that the infrared light is received by an optical sensor corresponding to the infrared part IR in the optical sensor module after being reflected by the outside world, so as to perform functions such as distance detection. Among them, the infrared light emitter can be independent of the optical sensor module, or it can be integrated inside the optical sensor module. The specific structure and principle of the optical sensor module are the same as those of the above embodiments, and will not be repeated here. The electronic device can specifically be a monitoring device, or a portable device such as a mobile phone, or a vehicle-mounted device used in a vehicle, etc.

[0062] The embodiment of the present application also provides a vehicle, including the above-mentioned electronic device. The vehicle can capture visible light through the optical sensor of the RGB channel in the optical sensor module of the electronic device, and can monitor during the day or determine the distance of obstacles based on the capture of visible light; and can capture infrared light through the optical sensor of the IR channel in the optical sensor module, and can monitor at night or determine the distance of obstacles based on the capture of infrared light.

[0063] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in this application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integration. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk), etc.

[0064] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical sensor module, characterized in that: include: An optical sensor array layer, a filter layer and a lens layer, wherein the filter layer is located between the optical sensor array layer and the lens layer; The filter layer comprises a color filter array and an infrared cut-off layer; at least a portion of the color filter array and the infrared cut-off layer are stacked; The color filter array includes a visible light part and an infrared part; the visible light part allows visible light to pass through, and the infrared part can partially or completely cut off visible light and allow infrared light to pass through; The infrared cutoff layer includes an effective area; the effective area of ​​the infrared cutoff layer overlaps with the visible light portion of the color filter array, and the effective area of ​​the infrared cutoff layer does not overlap with at least part of the infrared portion of the color filter array, wherein the effective area of ​​the infrared cutoff layer can cut off infrared light.

2. The optical sensor module according to claim 1, characterized in that: The filter layer further comprises an infrared bandpass layer, and the infrared bandpass layer, the infrared cut-off layer and the color filter array are stacked; The infrared bandpass layer includes an effective area, the effective area of ​​the infrared bandpass layer overlaps with the infrared part of the color filter array, the effective area of ​​the infrared bandpass layer does not overlap with at least part of the visible light part of the color filter array, the effective area of ​​the infrared bandpass layer can cut off visible light and allow infrared light to pass, and the passband bandwidth of the infrared light in the effective area of ​​the infrared bandpass layer is smaller than the passband bandwidth in the infrared part of the color filter array.

3. The optical sensor module according to claim 2, characterized in that: The infrared cut-off layer further comprises an ineffective region, and the ineffective region of the infrared cut-off layer can pass infrared light; The infrared bandpass layer further comprises an invalid region, and the invalid region of the infrared bandpass layer can pass visible light; The ineffective area of ​​the infrared cut-off layer overlaps with the infrared portion of the color filter array; The inactive region of the infrared bandpass layer overlaps the visible light portion of the color filter array; The ineffective area of ​​the infrared cut-off layer and the ineffective area of ​​the infrared band-pass layer are filled with a transparent material.

4. The optical sensor module according to claim 3, characterized in that: The effective area of ​​the infrared cut-off layer covers the visible light part of the color filter array in the projection area of ​​the plane where the color filter array is located; The effective area of ​​the infrared bandpass layer is located within the infrared part of the color filter array in the projected area of ​​the plane where the color filter array is located.

5. The optical sensor module according to any one of claims 1 to 4, characterized in that: The infrared cut-off layer is located between the lens layer and the color filter array; A first filling layer is provided between the optical sensor array layer and the color filter array; A second filling layer is provided between the infrared cut-off layer and the color filter array; A third filling layer is arranged between the infrared cut-off layer and the lens layer.

6. The optical sensor module according to claim 1, characterized in that: The filter layer further comprises an infrared bandpass layer, and the infrared cut-off layer and the infrared bandpass layer are located in the same layer; The infrared bandpass layer overlaps with the infrared part of the color filter array, and at least partially does not overlap with the visible light part of the color filter array. The infrared bandpass layer can cut off visible light and allow infrared light to pass through. The passband bandwidth of infrared light in the infrared bandpass layer is smaller than the passband bandwidth in the infrared part of the color filter array.

7. The optical sensor module according to claim 1, characterized in that: The thickness of the infrared portion is greater than the thickness of the visible light portion.

8. The optical sensor module according to claim 1 or 7, characterized in that: The central wavelength of the infrared part is between 800nm ​​and 1000nm, and has a passband width of 10nm to 50nm.

9. The optical sensor module according to any one of claims 1, 7 and 8, characterized in that: The optical sensor array layer includes a first optical sensor that overlaps the visible light portion of the color filter array; The optical sensor array layer also includes a second optical sensor overlapping the infrared portion of the color filter array; The projection of the infrared part on the plane where the second optical sensor is located is located within the second optical sensor.

10. The optical sensor module according to any one of claims 7, 8 and 9, characterized in that: The visible portion is made of an organic material, and the effective area of ​​the infrared cutoff layer is made of an inorganic material.

11. An electronic device, characterized in that: Comprising the optical sensor module as claimed in any one of claims 1 to 10.

12. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 11.

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