TW202219721A - Optical sensing module - Google Patents

Abstract

The present invention provides an optical sensing module including: a photosensitive element layer; a light-shielding lamination arranged on the photosensitive element layer; a lens layer arranged on the light-shielding lamination; and a plurality of light-transmitting channel. The light-shielding lamination is at least sequentially stacked with a first color filter film layer and a second color filter film layer from the photosensitive element layer. The first color filter film layer has a first transmission light waveband, and the second color filter film layer at least partially blocks the first transmission light waveband. The lens layer includes a plurality of lenses. The plurality of light-transmitting channels respectively arranges to pass through the light-shielding lamination with respect to each of the plurality of lenses, and is surrounded by the light-shielding lamination.

Description

Optical sensing module

The present invention relates to an optical sensing module. Specifically, the present invention relates to an optical sensing module having a plurality of stacked color filter layers.

Many optical sensors can use whether the light is incident or not and the distribution map of the light corresponding to each optical sensing unit to perform the expected sensing action. On the other hand, a common optical sensor can use a microlens condensing layer to focus light on the sensor element located at the focal length, so as to read the characteristic information of the incidence and distribution of the light. For example, optical sensors can be applied to biometric identification, such as fingerprints, palm prints, retina, iris, vein distribution, etc., so as to protect personal information or use switching of digital devices, and can be used to improve information confidentiality and security . Therefore, such optical sensors with thin and light advantages are widely used in portable electronic devices. However, when this type of optical sensor detects light, each optical sensing unit may be disturbed due to unexpected incident light from different angles, resulting in optical sensing defects such as cross talk. Wait.

In order to solve the above problems, in some newly developed optical sensors, a light shielding layer such as a black matrix layer may be arranged between the optical sensing units of the optical sensor to eliminate possible interference light incident. However, a single-layer black matrix layer may only have a light-shielding effect on light incident from a specific angle, and thus, multiple black matrix layers need to be provided to shield light from different angles. In addition, in the currently widely used process, if the black matrix layer needs to be provided, the process of transferring and the consumption of production capacity may be increased unnecessarily, which is not conducive to reducing the manufacturing cost and increasing the manufacturing efficiency.

technical means to solve problems

In order to solve the above problems, according to an embodiment of the present invention, an optical sensing module is provided, which includes: a photosensitive element layer; a color filter film layer and a second color filter film layer, wherein the first color filter film layer has a first transmitted light band, and the second color filter layer at least partially blocks the first transmitted light band; a lens The layer is disposed on the light-shielding stack and includes a plurality of lenses; and a plurality of light-transmitting channels respectively corresponding to each of the plurality of lenses and disposed through the light-shielding stack and surrounded by the light-shielding stack.

Efficacy compared to prior art

According to the optical sensing module provided by the various embodiments of the present invention, it is possible to reduce or avoid non-target light incident to be sensed, thereby reducing or avoiding possible false optical sensing results. Thereby, the resolution of the optical sensing module can be increased and the occurrence of phenomena such as crosstalk can be reduced. In addition, according to the optical sensing module of various embodiments of the present invention, the black matrix layer can be reduced, and the production capacity of the process of disposing the black matrix layer can be reduced or reduced accordingly. Further, the optical sensing module according to the embodiments of the present invention can further reduce the reflection interference after the non-target light is incident. Therefore, the optical sensing module according to the present invention can improve the accuracy, resolution and appearance of optical sensing, and can reduce the consumption of production capacity.

Various embodiments will be described below, and those skilled in the art should easily understand the spirit and principles of the present invention by referring to the description and the drawings. However, although some specific embodiments are described in detail herein, these embodiments are intended to be illustrative only, and are not to be considered in a limiting or exhaustive sense in all respects. Therefore, various changes and modifications to the present invention should be apparent to and can be easily accomplished by those skilled in the art without departing from the spirit and principles of the present invention.

Referring to FIG. 1A , according to an embodiment of the present invention, an optical sensing module 10 is disclosed, which includes a photosensitive element layer 100 for receiving light for sensing, a light-shielding stack 300 disposed on the photosensitive element layer 100 , and The lens layer 200 including a plurality of lenses 210 is disposed on the light-shielding stack 300 . The lens 210 may be a microlens, such as but not limited to a microlens with a height of 3.5µm to 4.2µm. However, the size of the micromirror is only an example, and the size of the lens in other embodiments of the present invention is not specifically limited.

1B, which shows an enlarged cross-sectional view of the optical sensing module 10 taken along the AA' section line of FIG. 1A, the optical sensing module 10 is further provided with a plurality of light transmission channels 400 , each of the plurality of light-transmitting channels 400 is disposed through the light-shielding stack 300 corresponding to each of the plurality of lenses 210 , and is surrounded by the light-shielding stack 300 . Wherein, according to some embodiments, each of the light-transmitting channels 400 may be at least partially filled with an infrared shield 500 . For example, if the photosensitive element layer 100 does not receive infrared rays or is easily interfered by infrared rays, the infrared shielding material 500 can be filled at least partially or completely in the light transmission channel 400 . In this way, infrared rays can be blocked from entering the photosensitive element layer 100 through the light transmission channel 400 . Further, according to an embodiment, the infrared shielding object 500 can be, for example, a green filter layer that can block infrared rays. However, the above-mentioned materials or substances that can be used as the infrared shielding object 500 are only examples, and the present invention is not limited thereto. In addition, the light-transmitting channel 400 according to different embodiments of the present invention may not be filled with any substance, or may be filled with substances other than the infrared shielding object 500 .

According to this embodiment, the above-mentioned light-shielding stack 300 surrounding the light-transmitting channel 400 can be formed by stacking a plurality of different color filter layers. For example, as shown in FIG. 1B , the light-shielding stack 300 may be sequentially stacked with at least a first dichroic layer 310 and a second dichroic layer 320 from the photosensitive element layer 100 to the lens layer 200 . The first dichroic layer 310 has a first transmission wavelength band, and the second dichroic layer 320 has a second transmission wavelength band. The first transmission wavelength band and the second transmission wavelength band do not completely overlap each other, and the second color filter layer 320 at least partially blocks the first transmission wavelength band.

The above-mentioned first transmitted light band and second transmitted light band represent the wavelength ranges in which light can pass through the first dichroic layer 310 and the second dichroic layer 320 , respectively. For example, referring to FIG. 1C , which shows the wavelength range of light rays that can penetrate the red filter layer R, the green filter layer G, and the blue filter layer B, respectively. Continuing from the above, it can be seen from FIG. 1C that different wavelengths of light can pass through the red filter layer R, the green filter layer G, and the blue filter layer B with different transmittances. Specifically, according to FIG. 1C , the transmitted light band of the red filter film R can be about 570 nm or more, the transmitted light band of the green filter G can be about 470 nm to 610 nm, and the blue The transmitted light band of the color filter layer B may be between about 370 nm and 550 nm. On top of that, different color filter layers may have different wavelength bands of transmitted light, and only light falling within the wavelength band of transmitted light can pass through a specific color filter layer. Therefore, when there are transmission wavelength bands that do not completely overlap with each other, the light in the transmission wavelength band that passes through a specific color filter layer may be blocked by another specific color filter layer and cannot pass through. For example, the light-shielding stack 300 according to the present embodiment may be formed by stacking at least two different color filter layers of the red filter layer R, the green filter layer G, and the blue filter layer B. . For example, the first dichroic layer 310 and the second dichroic layer 320 may be the red filter layer R and the blue filter layer B, respectively.

According to other embodiments of the present invention, dichroic layers other than red, green and blue can also be used as the first dichroic layer 310 and the second dichroic layer 320 . For example, the light-shielding stack 300 may be formed by stacking at least two of a cyan filter layer, a yellow filter layer, and a magenta filter layer. That is, according to various embodiments of the present invention, the color of the color filter film layer that can be used is not limited to the type specifically shown in this specification, and those with ordinary knowledge in the art can refer to the above principles to take any available color filter layer. A combination of colors is used to stack the light-shielding stacks 300 .

According to the optical sensing module 10 of the first embodiment as shown in FIG. 1B , the photosensitive element layer 100 may be provided with a plurality of photoreceptors or photosensitive units, which correspond to the respective lenses 210 to form a set of optical sensors. unit. On the other hand, the light-transmitting channel 400 corresponding to the outlet of the photosensitive element layer 100 can be aligned with the photoreceptor or the photosensitive unit. Therefore, when the lens 210 focuses the incident light, the photosensitive element layer 100 can receive and sense the light incident through a specific angle (eg, a positive angle) and passing through the respective light transmission channels 400 . Specifically, since light not incident from a specific expected angle will be blocked due to the influence of different wavelength bands of transmitted light of different color filter layers, it is difficult to enter the photosensitive element layer 100 through the light-shielding stack 300 . Therefore, according to this embodiment, in addition to the light passing through the light-transmitting channel 400 , the incident light at an unexpected angle can be reduced or avoided to be sensed, thereby reducing or avoiding possible false optical sensing results. In particular, when errors such as misalignment occur during the fabrication of the module, the defects of light incident at small angles other than the target may increase. On the basis of the above, the defect can be greatly improved by this embodiment, and it is not necessary to provide multiple black matrix layers for various possible incident angles. Thereby, the resolution of the optical sensing module 10 can be further increased and the occurrence of phenomena such as cross talk between different optical sensing units can be reduced. In addition, according to the optical sensing module 10 of the present embodiment, the black matrix layer can be eliminated or reduced, thereby reducing or reducing the production capacity that may be consumed in the process of disposing the black matrix layer. In addition, according to the structure of the optical sensing module 10 of the present embodiment, the process or equipment of the color filter can also be easily implemented. Therefore, the optical sensing module 10 according to the present invention can improve the accuracy and resolution of optical sensing, and can reduce the consumption of production capacity.

Further, referring to FIG. 1D , in the experimental results of incident light on different material layers and testing whether there is light reflected from the material layers, it can be seen that the black matrix layer BM (the BM 1 and BM 2 materials shown in FIG. 1D ) has an average Higher reflectivity (for example, the reflectivity is >10% on average), and at least two different color filter layers of red filter layer R, green filter layer G, and blue filter layer B are stacked on each other The resulting material layer has an average low optical reflectance (for example, the reflectance reaches an average of ≤5%). Continuing from the above, the photo of the black matrix layer BM (the BM 1 material shown in FIG. 1D ) shown in the upper left corner of FIG. 1D and the red filter layer R and the green filter layer G shown in the lower right corner , The reflection effect of the photo of the three-layer stack of the blue filter layer B also shows this point. Among them, the photo of the black matrix layer BM (material BM 1 as shown in Figure 1D ) in the upper left corner shows an obvious reflection image, while the photo of the stack of color filter layers in the lower right corner shows a relatively deep and pure black appearance . That is, according to various embodiments of the present invention, the light-shielding stack 300 formed by stacking different color filter layers can not only reduce the incident light from unexpected angles entering the photosensitive element layer 100 , but also further prevent the After the target light is incident, it is absorbed more and is no longer reflected, so as to reduce the interference of the reflected light reflected by the non-target light and the appearance change of the optical sensing module 10 .

According to some embodiments, due to the thickness of the respective color filter layers, the light-shielding stack 300 formed by stacking a plurality of color filter layers can have an average thickness of more than 9 μm, and can be used as each lens 210 The required separation thickness for focusing. However, for the black matrix layer BM, if the film thickness of the black matrix layer BM is reduced to a thickness of < 2 μm in order to reduce the reflectivity in particular, the black matrix layer BM with lower reflectivity (BM 3 shown in FIG. 1D ) The thickness of the material) will not be sufficient as the spacer thickness required for the focusing of each lens 210 , and needs to be additionally filled as the spacer thickness required for the focusing of each lens 210 .

Next, referring to FIG. 1E , according to a variation of the first embodiment of the present invention, the difference from the first embodiment shown in FIG. 1B is that each of the plurality of light-transmitting channels 405 is cross-sectionally parallel to the photosensitive element layer 100 . The area may gradually increase along the direction from the photosensitive element layer 100 to the lens layer 200 . That is, according to the optical sensing module 10 ′ of the modified embodiment of the first embodiment shown in FIG. 1E , the light transmission channel 405 is different from the light transmission channel 400 shown in FIG. 1B , and may have a gradient toward the photosensitive element layer 100 . Reduced diameter. In this way, the incident light focused by each lens 210 of the lens layer 200 can be guided, and the incident angle of the light that can enter the photosensitive element layer 100 can be limited by the light shielding stack 300 surrounding the light transmission channel 405, thereby greatly reducing or Avoid light incident from unexpected angles. Continuing from the above, based on this arrangement, the problem of crosstalk that may occur between the optical sensing units corresponding to adjacent lenses 210 can be further improved, thereby improving the resolution and accuracy of the optical sensing module 10'.

2, the optical sensing module 20 according to the second embodiment of the present invention, compared with the optical sensing module 10' shown in FIG. 1E, the difference lies in the optical sensing module 20. The light-shielding stack 300 may further include a third dichroic layer 330 stacked on a side of the second dichroic layer 320 facing the lens layer 200 . Specifically, referring to the above description of the first dichroic layer 310 and the second dichroic layer 320, the third dichroic layer 330 can be selected from the red filter layer, the green filter layer, the Color filter layers such as blue filter layer, cyan filter layer, yellow filter layer, magenta filter layer, etc. For example, in this embodiment, the first dichroic layer 310 can be a red filter layer, the second dichroic layer 320 can be a green filter layer, and the third dichroic layer can be 330 can be a blue color filter film layer, so that the corresponding transmitted light bands of each color filter film layer 310-330 are at least partially non-overlapping with each other. In this way, light incident at an unintended angle can be blocked in sequence when passing through the light shielding stack 300 , thereby reducing or preventing untargeted light from entering the photosensitive element layer 100 . However, the color types and color combinations of the above-mentioned stacking of color filter layers are only examples, and the embodiments according to the present invention are not limited to the specific listed aspects.

In addition, according to different embodiments of the present invention, the number of color filter layers that can be stacked in the light-shielding stack 300 is not limited thereto. That is, in addition to the two-layer and three-layer color filter layers exemplarily drawn in this specification, other embodiments according to the present invention may also have four or more color filter layers. .

Next, referring to FIG. 3 , the optical sensing module 30 according to the third embodiment of the present invention differs from the optical sensing module 20 shown in FIG. 2 in that at least part of the plurality of light transmission channels 405 is The filled infrared shield 500 extends from the plurality of light-transmitting channels 405 to the light-shielding stack 300 to be connected with one of the different color filter layers 310 , 320 and 330 of the light-shielding stack 300 . For example, as shown in FIG. 3 , the infrared shielding material 500 filled in the light-transmitting channel 405 extends from the light-transmitting channel 405 to the light-shielding stack 300 to be connected with the second color filter layer 320 . According to some embodiments, the infrared shield 500 is a green filter layer, and the second color filter layer 320 connected thereto is also a green filter layer. As mentioned above, in some embodiments, a green filter layer can be directly formed across the light transmission channel 405 and the light shielding stack 300 to form the infrared shield 500 and a color filter layer. However, the above is only an example, and the present invention is not limited thereto, and in the case where the infrared shielding object 500 is connected with a color filter film layer, the infrared shielding object 500 and the color filter film layer can be integrally formed or Formed separately.

In some embodiments, as shown in FIG. 3 , the infrared shield 500 disposed in the light-transmitting channel 405 and connected to a layer of color filter film may be affected by differences or reasons such as gravity or manufacturing process. The dichroic layer such as the second dichroic layer 320 is slightly displaced or shifted. However, what is shown here is merely an example, and the misalignment or offset may not be present in other embodiments according to the present invention.

Next, referring to FIG. 4 , the optical sensing module 40 according to the fourth embodiment of the present invention is different from the optical sensing module 30 shown in FIG. 3 in that the light-transmitting channel 405 extends to the light-shielding stack. The infrared shield 500 of 300 is connected to the first color filter layer 310 . For example, the first color filter layer 310 is a green filter layer, and the infrared shielding object 500 is also a green filter layer. In this embodiment, the infrared shield 500 can be integrally formed with the first color filter layer 310 . In this way, the infrared shield 500 can be filled at the same time together with the process of forming the first color filter layer 310 , and the filling shape of the infrared shield 500 can be reduced or avoided along the light transmission channel 405 because it is located at the bottom layer of the light shielding stack 300 . deformation or displacement. Continuing from the above, except that the position and distribution of the infrared shielding object 500 and the color filter layer to which it is connected are different, the implementation principle of this embodiment is similar to that of the embodiment described in FIG. 3 , which will not be repeated here. .

Next, referring to FIG. 5 , the optical sensing module 50 according to the fifth embodiment of the present invention is different from the optical sensing module 30 shown in FIG. 3 in that it further includes a transparent compensation layer 620 disposed on the between the light shielding stack 300 and the lens layer 200 . Wherein, each of the plurality of light transmission channels 405 corresponding to each of the plurality of lenses 210 may be disposed through the transparent compensation layer 620 and surrounded by the transparent compensation layer 620 . According to some embodiments, the transparent compensation layer 620 may be formed of a light-transmitting layer formed of an organic material. For example, the transparent compensation layer 620 may be composed of light-transmitting materials such as OC (Overcoat), POC (Photo Overcoat), or PS (Photo spacer). However, the above are only examples, and the present invention is not limited thereto. For example, in other embodiments, the transparent compensation layer 620 can also be made of the same lens material as the lens 210 of the lens layer 200 . Alternatively, the transparent compensation layer 620 may also be made of, for example, glass.

Furthermore, if the thickness of the light-shielding stack 300 is insufficient, the transparent compensation layer 620 can further increase the thickness of the gap between the lens layer 200 and the photosensitive element layer 100 without hindering the incident light. Thereby, the thickness of the interval between the lens 210 of the lens layer 200 and the photosensitive element 100 can be adjusted to be equal to or smaller than the focal length of the lens 210 . Therefore, when the light is refracted and focused through the lens 210 and incident on the optical sensing module 50 , the light can be focused and incident on the photosensitive element layer 100 through the light transmission channel 405 to be sensed by the photosensitive element layer 100 . In addition, according to some embodiments of the present invention, the stress of the overall structure can be adjusted by disposing the transparent compensation layer 620 . For example, according to the present embodiment, the stress applied to the optical sensing module 50 can be relieved by the transparent compensation layer 620 .

Further, referring to FIG. 6 together with FIG. 5 , according to the optical sensing module 60 according to the sixth embodiment of the present invention, the distance g between the lenses 210 can be adjusted by disposing the transparent compensation layer 620 . Specifically, during formation (eg, molding or laying), the lenses 210 may attract each other due to reasons such as but not limited to capillary phenomenon, and thus cannot be individually formed. Therefore, it is necessary to maintain a certain distance g between the lenses 210 so that the respective lenses 210 can be formed independently and without interference. That is, the minimum distance g that can be set between the lenses 210 may be determined by the difference in surface energy. On the other hand, when a light-transmitting material such as POC (Photo Overcoat) or PS (Photo spacer) is provided as the transparent compensation layer 620 , the distance g can be further reduced to 3.3 μm and 4.7 μm, respectively. Therefore, the filling rate (for example, the density) of the disposing lens 210 can be increased, so that the resolution of the overall photoreceptor can be increased.

Next, referring to FIG. 7 , the optical sensing module 70 according to the seventh embodiment of the present invention is different from the optical sensing module 50 shown in FIG. 5 in that in addition to the transparent compensation layer 620 , the optical sensing module 70 may further include Another transparent compensation layer 610 is disposed between the light-shielding stack 300 and the photosensitive element layer 100 . That is, the optical sensing module 70 may include two transparent compensation layers 610 and 620 respectively disposed between the light shielding stack 300 and the photosensitive element layer 100 ; and between the light shielding stack 300 and the lens layer 200 . As mentioned above, the function of the transparent compensation layer 610 may be at least partially the same as or similar to that of the transparent compensation layer 620 , and may be formed of the same, similar or different materials as the transparent compensation layer 620 . For example, the transparent compensation layer 610 can function to further increase the thickness of the interval between the lens layer 200 and the photosensitive element layer 100 without hindering the incident light. Alternatively, the transparent compensation layer 610 may be provided to adjust, eg, relieve stress of the overall structure. In addition, the state in which the transparent compensation layers 610 and 620 are provided at the same time shown here is only an example, and according to other embodiments of the present invention, only the transparent compensation layer 610 may be provided on the light-shielding stack 300 and the photosensitive element layer 100 . The transparent compensation layer 620 is not provided therebetween. On the other hand, according to various embodiments of the present invention, under the condition that the light transmission condition is satisfied, the quantity, position and material of the transparent compensation layers that can be disposed between the photosensitive element layer 100 and the lens layer 200 are not limited to those specifically shown here. and description.

Next, referring to FIG. 8 , the optical sensing module 80 according to the eighth embodiment of the present invention is different from the optical sensing module 50 shown in FIG. 5 in that, in addition to the transparent compensation layer 620 , the optical sensing module 80 may further include The black matrix layer 710 and the passivation protection layer 720 are disposed between the photosensitive element layer 100 and the light-shielding stack 300 . Specifically, in addition to disposing the light-shielding stack 300, according to some embodiments of the present invention, disposing a single-layer black matrix layer 710 is not excluded. In particular, a single-layer black matrix layer 710 can be disposed on the photosensitive element layer 100 . In this way, any light that may be incident to the photosensitive element layer 100 bypassing the light-shielding stack 300 can be blocked, or the light that may be generated by the optical sensing module 80 itself can be blocked from entering the photosensitive element layer 100 without being blocked by the light-shielding stack 300 . of light leakage. In addition, when the semi-finished product needs to be transferred to other factories for the remaining processes, a passivation protection layer 720 can be further disposed on the semi-finished product to protect the semi-finished product. For example, after the photosensitive element layer 100 and the black matrix layer 710 are formed, in order to transfer to other factories that can prepare and form the color filter layer, a passivation protection layer 720 can be further formed on the black matrix layer 710, so that during the transfer The semi-finished product including the photosensitive element layer 100 and the black matrix layer 710 is protected. However, the above are only examples, and the location and timing where the passivation protection layer 720 can be provided are not limited to the examples shown here. In addition, in some embodiments, only the black matrix layer 710 may be provided without the passivation protection layer 720 , or only the passivation protection layer 720 may be provided on the photosensitive element layer 100 without the black matrix layer 710 .

Continuing from the above, according to various embodiments of the present invention, each of the plurality of light transmission channels 405 is disposed through the black matrix layer 710, the passivation protection layer 720, or a combination thereof corresponding to each of the plurality of lenses 210, and Surrounded by black matrix layer 710, passivation protection layer 720, or a combination thereof. Thereby, the light focused by the lens 210 can be incident into the photosensitive element layer 100 through the light transmission channel 405 .

Hereinafter, the incident light of the optical sensing module 90 according to an embodiment of the present invention will be described in detail with reference to FIGS. 9 to 10B . In detail, referring to the ninth embodiment of FIG. 9 to FIG. 10B , the optical sensing module 90 may include all the elements shown in the above-mentioned embodiments, and is different from the optical sensing module 80 shown in the above-mentioned FIG. 8 . It consists of two transparent compensation layers 610 and 620 instead of one transparent compensation layer 620 .

10A , since the condensing focal point F of each of the plurality of lenses 210 falls in the photosensitive element layer 100 , when the light L1 from the expected direction and angle (eg, within 10 degrees of positive deviation) enters the lens 210 When the optical sensing unit is used, the lens 210 can refract and focus the light L1 through the light transmission channel 405 to reach the condensing focal point F located in the photosensitive element layer 100 . Thereby, the photosensitive element layer 100 can receive and sense the target light L1 from the desired direction and angle.

In contrast, referring to FIG. 10B , when light L2 from unexpected directions and angles is incident on the optical sensing module 90 according to the present embodiment, the light L2 is at least partially blocked when directly incident on the light shielding stack 300 . Blocked or at least partially blocked when refracted by the lens 210 and then directed to the light shielding stack 300 . Therefore, the non-target light L2 from unexpected directions and angles can be reduced or avoided, especially the misjudgment of the photosensitive element layer 100 caused by the incident of light corresponding to other optical sensing units. Therefore, the accuracy of the optical sensing module 90 can be further improved and interference between different optical sensing units can be reduced or avoided. In addition, based on this structure, the distance between the lenses 210 can be further reduced without causing interference between different optical sensing units, so that the resolution of the overall optical sensing module 90 can be improved accordingly.

In this embodiment, there may be a small amount of light L3 that can pass through the light-shielding stack 300 , or enter through the light-shielding stack 300 , or between the light-shielding stack 300 and the photosensitive element layer 100 by other elements or entered by the light source. Accordingly, such light rays L3 may be further at least partially blocked by the black matrix layer 710 disposed between the light shielding stack 300 and the photosensitive element layer 100 . On the other hand, if there is no such situation or the light caused by the above situation does not affect the sensing judgment of the photosensitive element layer 100 , the black matrix layer 710 does not need to be provided.

Next, according to the optical sensing module 80 of the eighth embodiment shown in FIG. 8 as an example, the experimental results of the light-receiving efficiency of the photosensitive element layer 100 are shown in FIG. 11 . Specifically, when receiving light by the optical sensing module 80 of the eighth embodiment shown in FIG. 8 , the direction substantially perpendicular to the layers of the optical sensing module 80 is taken as the positive 0 degree, It can be seen that the light incident within about 10 degrees of the forward deviation can be received and sensed by the photosensitive element layer 100 . However, light incident in an angular direction other than 10 degrees of the forward deviation cannot be received and sensed by the photosensitive element layer 100 or is difficult to receive. Continuing from the above, it can be seen from the experimental results that according to the present embodiment, the optical sensing module 80 can reduce or avoid the interference of non-target light, thereby improving the resolution and reliability of the optical sensing module 80 .

Hereinafter, the mode of using the optical sensing modules 10-90 in combination with other modules according to various embodiments of the present invention will be further described.

Continuing from the above, referring to FIG. 12 , according to an embodiment of the present invention, the optical sensing modules 10 - 90 of the embodiments described above with reference to FIGS. 1A to 11 can be further matched with the display module 800 to form an optical sensor module 800 . A display device 1000 for sensing capability. Specifically, as shown in FIG. 12 , the display device 1000 may include: the optical sensing module 10-90 described in any of the above embodiments; and a display module disposed on the optical sensing module 10-90 800. In addition, in order to protect the display module 800 , according to this embodiment, a cover glass 900 may be further provided to cover the display module 800 .

According to this embodiment, the display module 800 can be, for example, but not limited to, an organic light emitting display module, and can include an array of a plurality of OLEDs 805 . In addition, the photosensitive element layer in the optical sensing modules 10-90 can be, for example, a fingerprint sensor (FPS, Finger Print Sensor), and when the finger 15 is pressed, it can sense the incident information with the finger 15 The light transmittance spectrum of the light can be used to interpret biological characteristics such as fingerprints. As mentioned above, when an operator presses his finger 15 on the display device 1000, the presence or absence and distribution of light incident through the finger 15 can be sensed by the optical sensing modules 10-90 under the display module 800, In this way, the identification of fingerprints can be used to carry out related electronic operations.

According to some embodiments, the display module 800 may have color film layers of the same color as the first color filter film layer 310 , the second color filter film layer 320 or the third color filter film layer 330 , respectively. Therefore, when manufacturing the display device 1000, the display module 800 and the optical sensing modules 10-90 can be manufactured by using the similar and the same process or equipment, thereby improving the manufacturing efficiency and convenience, and reducing the loss of production capacity or increased costs.

The above-mentioned optical sensing modules 10 - 90 are combined with the display module 800 to form the display device 1000 with optical sensing capability, which is only an example. Continuing from the above, according to other embodiments of the present invention, the optical sensing modules 10-90 can also be combined with other modules, and the present invention is not limited to the specific description.

To sum up, the optical sensing module according to the various embodiments of the present invention can reduce or avoid the interference of non-target light, thereby improving the resolution and accuracy of the overall optical sensing. In addition, according to various embodiments of the present invention, the loss of production capacity caused by disposing the black matrix layer can be reduced or avoided.

The foregoing descriptions are only some preferred embodiments of the present invention. It should be noted that various changes and modifications can be made in the present invention without departing from the spirit and principles of the invention. Those with ordinary knowledge in the technical field should understand that the present invention is defined by the scope of the appended patent application, and under the meaning of the present invention, various possible changes such as substitution, combination, modification and diversion are within the scope of the present invention. The scope is defined by the attached scope of the patent application.

10, 10', 20, 30, 40, 50, 60, 70, 80, 90: Optical sensing module 15: Fingers 100: Photosensitive element layer 200: Lens Layer 210: Lens 300: Blackout Laminate 310: the first color filter layer 320: The second color filter layer 330: The third color filter layer 400, 405: light transmission channel 500: Infrared shield 610, 620: Transparent compensation layer 710, BM: black matrix layer 720: Passivation protective layer 800: Display module 805:OLED 900: Cover glass 1000: Display device F: Spotlight L1, L2, L3: light R: red filter layer G: Green filter layer B: blue filter layer

FIG. 1A is a schematic diagram of an optical sensing module according to an embodiment of the present invention.

1B is an enlarged cross-sectional view of a portion of the optical sensing module taken along the section line A-A' of FIG. 1A according to the first embodiment of the present invention.

FIG. 1C is a schematic diagram of the respective corresponding transmission wavelength bands of the red, green and blue filter layers according to an embodiment of the present invention.

FIG. 1D is a schematic diagram of the reflectivity of stacks of different color filter film layers according to an embodiment of the present invention.

1E is an enlarged cross-sectional view of a portion of the optical sensing module taken along the section line A-A' of FIG. 1A according to a variation of the first embodiment of the present invention.

2 is an enlarged cross-sectional view of a portion of an optical sensing module according to a second embodiment of the present invention.

3 is an enlarged cross-sectional view of a portion of an optical sensing module according to a third embodiment of the present invention.

4 is an enlarged cross-sectional view of a portion of an optical sensing module according to a fourth embodiment of the present invention.

5 is an enlarged cross-sectional view of a portion of an optical sensing module according to a fifth embodiment of the present invention.

6 is a schematic diagram of the distance between lenses of an optical sensing module according to a sixth embodiment of the present invention.

7 is an enlarged cross-sectional view of a portion of an optical sensing module according to a seventh embodiment of the present invention.

8 is an enlarged cross-sectional view of a portion of an optical sensing module according to an eighth embodiment of the present invention.

9 is an enlarged cross-sectional view of a portion of an optical sensing module according to a ninth embodiment of the present invention.

FIG. 10A and FIG. 10B are schematic diagrams illustrating the simulation of light paths of the optical sensing module according to FIG. 9 under various light incidents.

FIG. 11 is a schematic diagram showing the light-receiving efficiency of the photosensitive element layer of the optical sensing module shown in FIG. 8 for incident light at various angles.

FIG. 12 is a schematic diagram of a display device including an optical sensing module.

none

10: Optical sensing module

100: Photosensitive element layer

200: Lens Layer

210: Lens

310: the first color filter layer

320: The second color filter layer

300: Blackout Laminate

400: light transmission channel

500: Infrared shield

Claims (13)

An optical sensing module, comprising: a photosensitive element layer; A light-shielding stack is disposed on the photosensitive element layer, and at least a first color filter film layer and a second color filter film layer are stacked from the photosensitive element layer in sequence, wherein the first color filter film The layer has a first transmission wavelength band, and the second color filter layer at least partially blocks the first transmission wavelength band; a lens layer disposed on the light-shielding stack and comprising a plurality of lenses; and A plurality of light-transmitting channels, corresponding to each of the plurality of lenses, are respectively disposed through the light-shielding stack and surrounded by the light-shielding stack. The optical sensing module of claim 1, wherein the light-shielding stack further comprises a third color filter layer stacked on a side of the second color filter layer facing the lens layer. The optical sensing module of claim 1 or 2, wherein each of the plurality of light-transmitting channels is at least partially filled with an infrared shield. The optical sensing module of claim 3, wherein the infrared shielding object is a green filter layer. The optical sensing module of claim 4, wherein the infrared shielding object extends from the plurality of light-transmitting channels to the light-shielding stack so as to be in phase with one of the different color filter layers of the light-shielding stack connect. The optical sensing module of claim 5, wherein the first color filter layer is a green filter layer, and the infrared shield is connected to the first color filter layer. The optical sensing module of claim 1 or 2, further comprising at least one transparent compensation layer disposed between the light-shielding stack and the photosensitive element layer; between the light-shielding stack and the lens layer; or combination, and, Wherein, each of the plurality of light transmission channels is disposed through the at least one transparent compensation layer corresponding to each of the plurality of lenses, and is surrounded by the at least one transparent compensation layer. The optical sensing module of claim 7, wherein the at least one transparent compensation layer is formed of an organic material. The optical sensing module according to claim 8, wherein the at least one transparent compensation layer is made of OC (Overcoat), POC (Photo Overcoat) or PS (Photo spacer) light-transmitting material. The optical sensing module according to claim 1 or 2, wherein an area of each of the plurality of light transmission channels parallel to the cross-section of the photosensitive element layer is along a direction from the photosensitive element layer to the lens layer incrementally. The optical sensing module according to claim 1 or 2, further comprising a black matrix layer, a passivation protection layer, or a combination thereof disposed between the photosensitive element layer and the light-shielding stack, and the plurality of transparent Each of the light channels corresponding to each of the plurality of lenses is disposed through the black matrix layer, the passivation protection layer, or a combination thereof, and is surrounded by the black matrix layer, the passivation protection layer, or a combination thereof. The optical sensing module of claim 1 or 2, wherein the optical reflectivity of the light-shielding stack is equal to or lower than 5%. The optical sensing module according to claim 1 or 2, wherein the condensing focus of each of the plurality of lenses falls in the photosensitive element layer.

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