CN113128445A

CN113128445A - Optical sensing module

Info

Publication number: CN113128445A
Application number: CN202110470838.7A
Authority: CN
Inventors: 郭有斌
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2020-11-12
Filing date: 2021-04-29
Publication date: 2021-07-16
Anticipated expiration: 2041-04-29
Also published as: CN113128445B; TWI749864B; TW202219721A

Abstract

The invention provides an optical sensing module, which comprises: a photosensitive element layer; a light-shielding lamination layer arranged on the photosensitive element layer; a lens layer disposed on the light-shielding laminate; and a plurality of light-transmitting channels. The shading laminated layer 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 penetrating light band, and the second color filter film layer at least partially blocks the first penetrating light band. The lens layer includes a plurality of lenses. The light-transmitting channels are respectively arranged corresponding to each lens and penetrate through the light-shielding lamination layer and are surrounded by the light-shielding lamination layer.

Description

Optical sensing module

Technical Field

The invention relates to an optical sensing module. In particular, the invention relates to an optical sensing module having a plurality of color filter film layers stacked.

Background

Many optical sensors can perform the desired sensing operation by using the incidence of light and the distribution pattern of light corresponding to each optical sensing unit. In view of the above, the conventional optical sensor can focus and project light onto the sensor element at the focal length by using the microlens focusing layer, so as to read the characteristic information of the incident and distribution of light. For example, optical sensors can be used for biometric identification, such as fingerprints, palm prints, retina, iris, vein distribution, etc., as personal information protection or usage switches for digitizing devices, and can be used to improve information security and safety. Therefore, such optical sensors with the advantages of being light and thin are widely used in portable electronic devices. However, when such optical sensors detect light, each optical sensing unit may be interfered by receiving light from different angles and incident unexpectedly, thereby generating optical sensing defects such as crosstalk (crosstalk).

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 disposed between each optical sensing unit of the optical sensor to eliminate possible interference light incidence. However, a single black matrix layer may have a light blocking effect only for light incident at a specific angle, and thus a plurality of black matrix layers are required to block light incident from different angles. In addition, in the widely used process, if the black matrix layer is required, the process of factory change and the consumption of production capacity may be unnecessarily increased, which is not favorable for reducing the manufacturing cost and increasing the manufacturing efficiency.

Disclosure of Invention

Means for solving the problems

To solve the above problems, an embodiment of the present invention provides an optical sensing module, which includes: a photosensitive element layer; the light shading lamination is arranged on the photosensitive element layer, and at least a first color filter film layer and a second color filter film layer are sequentially stacked on the photosensitive element layer, wherein the first color filter film layer has a first penetrating light wave band, and the second color filter film layer at least partially blocks the first penetrating light wave band; a lens layer disposed on the light-shielding lamination layer and including a plurality of lenses; and a plurality of light-transmitting channels, each corresponding to each of the plurality of lenses, passing through the light-shielding lamination and surrounded by the light-shielding lamination.

Compared with the prior art

According to the optical sensing module provided by the embodiments of the invention, the incidence of non-target light rays to be sensed can be reduced or avoided, so that the possible wrong optical sensing result can be reduced or avoided. Therefore, the resolution of the optical sensing module can be increased and the occurrence of crosstalk and the like can be reduced. In addition, according to the optical sensing module of the embodiments of the invention, the black matrix layer can be reduced, and thus the production capacity which can be consumed by the process of disposing the black matrix layer can be reduced or reduced. Further, according to the optical sensing module of the embodiments of the invention, the reflection interference after the incidence of the non-target light can be further reduced. Therefore, the optical sensing module according to the invention can improve the accuracy, resolution and appearance of optical sensing, and can reduce the consumption of production energy.

Drawings

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

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

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

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

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

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

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

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

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

Fig. 6 is a schematic view illustrating an inter-lens distance of an optical sensing module according to a sixth embodiment of the present invention.

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

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

Fig. 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 10B are schematic views illustrating optical path simulation of the optical sensing module according to fig. 9 under various light incidence conditions.

Fig. 11 is a schematic diagram illustrating the light receiving efficiency of the photosensitive element layer of the optical sensing module shown in fig. 8 for light rays incident at various angles.

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

Description of reference numerals:

10. 10', 20, 30, 40, 50, 60, 70, 80, 90: optical sensing module

15: finger(s)

100: photosensitive element layer

200: lens layer

210: lens and lens assembly

300: light-shielding laminate

310: the first color filter film layer

320: second color filter film layer

330: a third color filter film 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: light-gathering focus

L1, L2, L3: light ray

R: red light filtering film layer

G: green light filtering film layer

B: blue light filtering film layer

Detailed Description

Various embodiments will be described hereinafter, and the concepts and principles of the invention will be readily understood by those skilled in the art by reference to the following description taken in conjunction with the accompanying drawings. However, while certain specific embodiments are specifically illustrated herein, these embodiments are merely exemplary and are not to be considered in all respects as limiting or exhaustive. Therefore, it should be apparent and easily accomplished that various changes and modifications can be made to the present invention by those skilled in the art without departing from the concept and principle of the present invention.

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

Referring again to fig. 1B, which shows an enlarged cross-sectional view of the optical sensing module 10 taken along the section line a-a' of fig. 1A, the optical sensing module 10 is further provided with a plurality of light-transmitting channels 400, each of the plurality of light-transmitting channels 400 is respectively 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. According to some embodiments, each of the light-transmitting channels 400 may be at least partially filled with an infrared shielding material 500. For example, if the photosensitive element layer 100 is configured not to receive infrared rays or is easily interfered by infrared rays, the infrared shielding object 500 may be at least partially or completely filled in the light-transmitting channel 400. Therefore, the infrared rays can be blocked from being incident to the photosensitive element layer 100 through the light-transmitting channel 400. Further, according to an embodiment, the infrared shielding object 500 may be, for example, a green filter layer capable of blocking infrared rays. However, the above materials or substances that can be used as the infrared ray blocking object 500 are only examples, and the present invention is not limited thereto. In addition, the light-transmitting channel 400 according to various embodiments of the present invention may not be filled with any substance, or may be filled with a substance other than the infrared shielding material 500.

According to the present embodiment, the light-shielding stack 300 surrounding the light-transmitting channel 400 can be formed by stacking different color filter layers. For example, as shown in fig. 1B, the light shielding stack 300 may at least sequentially stack a first color filter layer 310 and a second color filter layer 320 from the photosensitive element layer 100 toward the lens layer 200. The first color filter film layer 310 has a first light-transmitting band, and the second color filter film layer 320 has a second light-transmitting band. The first and second light-transmitting wavelength bands are not completely overlapped with each other, and the second color filter film layer 320 at least partially blocks the first light-transmitting wavelength band.

The first and second transmission light bands represent ranges of light bands that can pass through the first and second color filter layers 310 and 320, respectively. For example, referring to fig. 1C, wavelength ranges of light that can pass through the red filter layer R, the green filter layer G, and the blue filter layer B are shown. As can be seen from fig. 1C, the transmittance of the light with different wavelengths passing through the red filter layer R, the green filter layer G and the blue filter layer B is different. Specifically, according to fig. 1C, the transmission light band of the red filter layer R may be about 570nm or more, the transmission light band of the green filter layer G may be about 470nm to 610nm, and the transmission light band of the blue filter layer B may be about 370nm to 550 nm. In this case, the color filter layers may have different transmission light bands, and only the light falling in the transmission light band may pass through a specific color filter layer. Therefore, when the light-transmitting bands are not completely overlapped with each other, the light of the light-transmitting band passing through one specific color filter layer may be blocked by another specific color filter layer and cannot pass through the other specific color filter layer. For example, the light-shielding stack 300 according to the present embodiment can be formed by stacking at least two different color filter layers of a red filter layer R, a green filter layer G, and a blue filter layer B. For example, the first color filter layer 310 and the second color filter layer 320 may be a red filter layer R and a blue filter layer B, respectively.

According to other embodiments of the present invention, color filter layers other than red, green and blue may be used as the first color filter layer 310 and the second color filter layer 320. For example, the light-shielding laminate 300 may be formed by stacking at least two of cyan filter film layers, yellow filter film layers, and magenta filter film layers on top of each other. That is, according to embodiments of the present invention, the colors of the available color filter film layers are not limited to the types specifically shown in the present specification, and one skilled in the art may stack the light shielding stack 300 in any available combination of colors with reference to the above principles.

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, for example, and respectively correspond to the respective lenses 210 to form a set of optical sensing units. Accordingly, the light-transmitting channel 400 corresponding to the exit 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 light-sensing device layer 100 can receive and sense the light incident therein through a specific angle (e.g., a forward angle) and passing through the respective light-transmitting channels 400. Specifically, since light incident from a specific desired angle is blocked due to the influence of different transmission wavelength band limitations of different color filter layers, it is difficult to enter the photosensitive element layer 100 through the light-shielding stack 300. Therefore, according to the present embodiment, in addition to the light passing through the light-transmitting channel 400, the incidence of light at an unexpected angle can be reduced or prevented from being sensed, thereby reducing or preventing a possible erroneous optical sensing result. In particular, when errors such as misalignment occur during module fabrication, defects of light incidence at a non-target small angle may increase. Accordingly, the present embodiment can greatly improve the defect without providing a plurality of black matrix layers for various possible incident angles. Therefore, it is possible to further increase the resolution of the optical sensing module 10 and reduce the occurrence of crosstalk (cross talk) between different optical sensing units. In addition, according to the optical sensing module 10 of the present embodiment, the black matrix layer may not be required or reduced, and thus the production capacity of the process for disposing the black matrix layer may be reduced or reduced. In addition, the structure of the optical sensing module 10 according to the present embodiment can also be easily implemented by using a process or an apparatus of a color filter. Therefore, the optical sensing module 10 according to the present invention can improve the accuracy and resolution of optical sensing, and 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 (such as BM 1 and BM 2 shown in fig. 1D) has an average high reflectivity (e.g., reflectivity of more than 10% on average), and the material layer 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 has an average low optical reflectivity (e.g., reflectivity of less than or equal to 5% on average). In summary, the reflection effect of the photo of the black matrix layer BM (BM 1 material shown in fig. 1D) shown in the upper left corner of fig. 1D and the photo of the stack of the red filter layer R, the green filter layer G and the blue filter layer B shown in the lower right corner also shows this point. The photo of the black matrix layer BM (the BM 1 material shown in fig. 1D) at the top left corner shows a significant reflection image, and the photo of the color filter layer stack at the bottom right corner shows a darker and pure black appearance. That is, according to the embodiments of the present invention, the light-shielding stack 300 formed by stacking different color filter layers can reduce the incident light with an unexpected angle from entering the photosensitive element layer 100, and further make the non-target light be absorbed more after entering the photosensitive element layer and not reflected again, so as to reduce the reflected light interference after entering the non-target light and the appearance change of the optical sensing module 10.

According to some embodiments, the light-shielding stack 300 formed by stacking a plurality of color filter layers on top of each other may have a thickness of 9um or more on average due to the thickness of the respective color filter layers, which may be used as a spacer thickness required for focusing of each lens 210. However, if the film thickness of the black matrix layer BM is reduced to a thickness of <2um in order to reduce the reflectivity, the thickness of the black matrix layer BM with lower reflectivity (the BM 3 material shown in fig. 1D) is not enough to be used as the spacer thickness required for focusing of each lens 210, and needs to be filled with the spacer thickness required for focusing of each lens 210.

Next, referring to fig. 1E, according to a variation of the first embodiment of the present invention, the difference between the first embodiment shown in fig. 1B and the variation is that the cross-sectional area of each of the plurality of light-transmitting channels 405 parallel to the photosensitive device layer 100 is gradually increased along the direction from the photosensitive device layer 100 to the lens layer 200. That is, according to the optical sensing module 10' of the variation of the first embodiment shown in fig. 1E, the light-transmitting channel 405 may have a caliber that is tapered toward the photosensitive element layer 100, different from the light-transmitting channel 400 shown in fig. 1B. Therefore, the light focused by each lens 210 of the lens layer 200 can be guided, and the incident angle of the light entering the photosensitive element layer 100 can be defined by the light shielding stack 300 surrounding the light transmitting channel 405, so that the light incident from an unexpected angle can be greatly reduced or avoided. Accordingly, the crosstalk problem that may occur between the optical sensing units corresponding to the adjacent lenses 210 can be further improved based on the configuration, so as to improve the resolution and the accuracy of the optical sensing module 10'.

Next, referring to fig. 2, the optical sensing module 20 according to the second embodiment of the present invention is different from the optical sensing module 10' shown in fig. 1E, in that the light-shielding stack 300 of the optical sensing module 20 may further include a third color filter film layer 330 stacked on a side of the second color filter film layer 320 facing the lens layer 200. Specifically, referring to the above description of the first color filter layer 310 and the second color filter layer 320, the third color filter layer 330 may be selected from color filter layers such as a red filter layer, a green filter layer, a blue filter layer, a cyan filter layer, a yellow filter layer, and a magenta filter layer. For example, in the present embodiment, the first color filter layer 310 may be a red filter layer, the second color filter layer 320 may be a green filter layer, and the third color filter layer 330 may be a blue filter layer, such that the corresponding transmission light bands of the color filter layers 310-330 are not overlapped with each other at least partially. Therefore, light rays incident at an unexpected angle can be sequentially blocked while passing through the light-shielding stack 300, thereby reducing or preventing unintended light rays from entering the photosensitive element layer 100. However, the color types and color combinations of the above-mentioned stacks of color filter layers are only examples, and the embodiments according to the present invention are not limited to the specific embodiments.

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

Next, referring to fig. 3, an optical sensing module 30 according to a third embodiment of the present invention is different from the optical sensing module 20 shown in fig. 2 in that an infrared shielding material 500 at least partially filled in the plurality of light transmitting channels 405 extends from the plurality of light transmitting channels 405 to the light shielding stack 300 to connect with one of the different color filter film layers 310, 320, 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 connect with the second color filter layer 320. According to some embodiments, the infrared shielding material 500 is a green filter layer, and the second color filter layer 320 connected thereto is also a green filter layer. Accordingly, in some embodiments, a green filter layer may be directly formed across the light-transmitting channel 405 and the light-shielding stack 300 to form the infrared shield 500 and a color filter layer. However, the above is merely an example, and the present invention is not limited thereto, and in the case where the infrared ray shield 500 is connected with a color filter layer, the infrared ray shield 500 and the color filter layer may be integrally formed or separately formed.

In some embodiments, as shown in fig. 3, the infrared shielding object 500 disposed in the light-transmitting channel 405 and connected to a color filter layer may be slightly misaligned or offset from the color filter layer, such as the second color filter layer 320, due to gravity, process variation, or the like. However, the illustrations herein are merely examples, and the misalignment or offset may not be present according to other embodiments of the present invention.

Next, referring to fig. 4, an optical sensing module 40 according to a fourth embodiment of the invention is different from the optical sensing module 30 shown in fig. 3 in that an infrared shielding object 500 extending from the light-transmitting channel 405 to the light-shielding stack 300 is connected to the first color filter film layer 310. For example, the first color filter layer 310 is a green filter layer, and the infrared shielding material 500 is also a green filter layer. In this embodiment, the infrared shielding object 500 may be integrally formed with the first color filter film layer 310. Therefore, the infrared ray shielding object 500 can be filled simultaneously with the process of forming the first color filter film layer 310, and the filling shape of the infrared ray shielding object 500 can be reduced or prevented from being deformed or displaced along the light transmission channel 405 due to the bottom layer of the light shielding lamination layer 300. In summary, the implementation principle of the present embodiment is similar to that of the embodiment described in fig. 3, except that the position and distribution of the infrared shielding object 500 and the color filter layer connected thereto are different, and will not be described herein again.

Next, referring to fig. 5, an optical sensing module 50 according to a 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 between the light-shielding stack 300 and the lens layer 200. Each of the plurality of light-transmitting channels 405 may be disposed through the transparent compensation layer 620 corresponding to each of the plurality of lenses 210 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 made of a light transmissive material such as oc (overcoat), poc (photo overcoat) or ps (photo spacer). However, the above is merely an example, and the present invention is not limited thereto. For example, in other embodiments, the transparent compensation layer 620 may be made of the same lens material as the lens 210 of the lens layer 200. Alternatively, the transparent compensation layer 620 may be made of glass, for example.

In this way, if the thickness of the light-shielding stack 300 is not sufficient, 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 incidence of light. Accordingly, the thickness of the space between the lens 210 of the lens layer 200 and the photosensitive element 100 can be adjusted to be equal to or less than the focal length of the lens 210. Therefore, when light is refracted and focused by the lens 210 and enters the optical sensing module 50, the light can be focused by the light-transmitting channel 405 and enters the photosensitive element layer 100 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 may be adjusted by providing 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 in conjunction with fig. 5, according to the optical sensing module 60 of the sixth embodiment of the present invention, the spacing g between the lenses 210 can be adjusted by disposing the transparent compensation layer 620. Specifically, the lenses 210 may be attracted to each other due to, for example, but not limited to, capillary phenomenon during formation (e.g., molding or laying), and thus cannot be individually molded. Therefore, it is necessary to maintain a certain distance g between the lenses 210 to independently and non-disturbingly form the respective lenses 210. That is, the minimum distance g that can be set between the lenses 210 may be determined due to the difference in surface energy. In this regard, when a transparent compensation layer 620 is formed of a transparent material such as POC (photo Overcoat) or PS (photo spacer), the distance g can be further reduced to 3.3 μm and 4.7 μm, respectively. Thus, the fill factor (e.g., density) of the set lens 210 may be increased, resulting in an increase in resolution of the overall exposure.

Next, referring to fig. 7, an optical sensing module 70 according to a seventh embodiment of the present invention is different from the optical sensing module 50 shown in fig. 5, in that another transparent compensation layer 610 may be further included in addition to the transparent compensation layer 620, and 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 or similar to the transparent compensation layer 620 and may be formed of the same, similar or different material as the transparent compensation layer 620. For example, the transparent compensation layer 610 may act to further increase the thickness of the space between the lens layer 200 and the photosensitive element layer 100 without blocking light incidence. Alternatively, the transparent compensation layer 610 may be provided to adjust, for example, to relieve stress in the overall structure. In addition, the embodiment shown herein in which the

transparent compensation layers

610 and 620 are disposed at the same time is merely an example, and according to other embodiments of the present invention, it is also possible to dispose only the transparent compensation layer 610 between the light-shielding stack 300 and the photosensitive element layer 100 without disposing the transparent compensation layer 620. In light of the above, the number, position and material of the transparent compensation layer that can be disposed between the photosensitive element layer 100 and the lens layer 200 under the condition of satisfying the light transmission condition according to the embodiments of the present invention are not limited to the embodiments specifically illustrated and described herein.

Next, referring to fig. 8, the optical sensing module 80 according to the eighth embodiment of the invention is different from the optical sensing module 50 shown in fig. 5, in that a black matrix layer 710 and a passivation layer 720 may be further included in addition to the transparent compensation layer 620 between the photosensitive element layer 100 and the light-shielding stack 300. Specifically, the provision of a single black matrix layer 710 is also not excluded according to some embodiments of the present invention, in addition to the provision of the light-shielding stack 300. In particular, a single black matrix layer 710 may be disposed on the photosensitive element layer 100. Therefore, any light that may enter the photosensitive device layer 100 by bypassing the light-shielding stack 300 can be blocked, or light leakage that may be generated by the optical sensor module 80 itself and enter the photosensitive device layer 100 without being blocked by the light-shielding stack 300 can be blocked. In addition, when the semi-finished product needs to be transferred to other factories for the rest of the processes, a passivation protection layer 720 may be further provided on the semi-finished product to protect the semi-finished product. For example, after the formation of the photosensitive element layer 100 and the black matrix layer 710, in order to be transferred to other factories where color filter layers can be formed, a passivation protection layer 720 can be further formed on the black matrix layer 710 to protect the semi-finished products including the photosensitive element layer 100 and the black matrix layer 710 during the transfer. However, the above is merely an example, and the position and timing where the passivation protection layer 720 may be disposed are not limited to the example shown herein. In addition, in some embodiments, only the black matrix layer 710 may be disposed without the passivation layer 720, or only the passivation layer 720 may be disposed on the photosensitive device layer 100 without the black matrix layer 710.

As described above, according to various embodiments of the present invention, each of the plurality of light-transmitting channels 405 is disposed through the black matrix layer 710, the passivation layer 720, or a combination thereof corresponding to each of the plurality of lenses 210, and is surrounded by the black matrix layer 710, the passivation layer 720, or a combination thereof. Therefore, the light focused by the lens 210 can be incident into the photosensitive element layer 100 through the light-transmitting channel 405.

Hereinafter, the incident light of the optical sensing module 90 according to an embodiment of the invention will be described in detail with further reference to fig. 9 to 10B. In detail, referring to the ninth embodiment of fig. 9 to 10B, the optical sensing module 90 may include all the components shown in the above embodiments, and the difference from the optical sensing module 80 shown in fig. 8 is that two

transparent compensation layers

610 and 620 are included instead of one transparent compensation layer 620.

In summary, referring to fig. 10A, since the light-converging focal point F of each of the plurality of lenses 210 is located in the photosensitive element layer 100, when the light L1 from the desired direction and angle (e.g. within 10 degrees of forward deviation) enters the optical sensing unit of the lens 210, the lens 210 can refract and focus the light L1 to pass through the light-transmitting channel 405 and reach the light-converging focal point F located in the photosensitive element layer 100. Therefore, the photosensitive element layer 100 can receive and sense the target light L1 from a desired direction and angle.

In contrast, referring to fig. 10B, when the light L2 from an unexpected direction and angle 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 or when refracted by the lens 210 and then incident on the light-shielding stack 300. Therefore, the unintended light L2 from unintended directions and angles, particularly the erroneous determination of the photosensitive element layer 100 caused by the incidence of light corresponding to other optical sensing units, can be reduced or avoided. Therefore, the accuracy of the optical sensing module 90 can be further improved and the 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 entire optical sensing module 90 can be improved accordingly.

In this embodiment, there may be a small portion of the light L3 that can pass through the light shielding stack 300, or enter by bypassing the light shielding stack 300, or enter between the light shielding stack 300 and the photosensitive device layer 100 by being generated by other devices or light sources. Accordingly, the light L3 can 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. In this way, if the above condition does not exist or the light caused by the above condition does not affect the sensing and determination of the photosensitive element layer 100, the black matrix layer 710 may not be required to be disposed.

Next, the result of an experiment conducted on the light receiving efficiency of the photosensitive element layer 100 according to the optical sensing module 80 of the eighth embodiment shown in fig. 8 as an example is shown in fig. 11. Specifically, when the optical sensor module 80 of the eighth embodiment shown in fig. 8 receives light, the direction substantially perpendicular to the layers of the optical sensor module 80 is taken as the forward direction 0 degrees, and 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 at an angle other than a deviation of 10 degrees in the forward direction will not or hardly be received and sensed by the photosensitive element layer 100. In summary, 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 the non-target light, so as to improve the resolution and the reliability of the optical sensing module 80.

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

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 fig. 1A to 11 may be further combined with the display module 800 to form the display device 1000 with optical sensing capability. Specifically, as shown in fig. 12, the display device 1000 may include: the optical sensing module 10-90 of any of the above embodiments; and a display module 800 disposed on the optical sensing module 10-90. In addition, in order to protect the display module 800, a Cover glass (Cover glass)900 may be further disposed on the display module 800 according to the embodiment.

According to the present embodiment, the display module 800 may be, for example, but not limited to, an organic light emitting display module, and may include an array of a plurality of OLEDs 805. In addition, the photosensitive element layer in the optical sensing modules 10-90 may be, for example, a fingerprint Sensor (FPS), and when the Finger 15 presses, the light-transmitting pattern of the light with information incident through the Finger 15 can be sensed to determine the biological characteristics of the fingerprint. As described above, when an operator presses the finger 15 on the display device 1000, the presence or absence and the distribution of the light incident through the finger 15 can be sensed by the optical sensing modules 10-90 under the display module 800, so that the fingerprint can be identified and read to perform the related electronic operation.

According to some embodiments, the display module 800 may have color filter layers with the same color as the first color filter layer 310, the second color filter layer 320, or the third color filter layer 330, respectively. Therefore, when the display device 1000 is manufactured, the display module 800 and the optical sensing modules 10 to 90 may be manufactured using similar and identical processes or apparatuses, thereby improving manufacturing efficiency and convenience and reducing loss of production or increase of cost.

The above-described optical sensing modules 10-90 combined with the display module 800 to form the display device 1000 having optical sensing capability are merely examples. In other embodiments, the optical sensing modules 10-90 can be combined with other modules, and the invention is not limited to the specific embodiments.

In summary, the optical sensing module according to the embodiments of the invention can reduce or avoid the interference of the non-target light, thereby improving the resolution and accuracy of the overall optical sensing. In addition, according to the embodiments of the present invention, the loss of productivity due to the provision of the black matrix layer can be reduced or avoided.

What has been described above are merely some of the 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 concept and principle of the invention. It will be apparent to those skilled in the art that the present invention is defined by the appended claims and that various changes, substitutions, combinations, modifications and alterations are possible without departing from the scope of the invention as defined by the appended claims.

Claims

1. An optical sensing module, comprising:

a photosensitive element layer;

a light-shielding lamination layer arranged on the photosensitive element layer, and at least a first color filter film layer and a second color filter film layer are stacked in sequence from the photosensitive element layer, wherein the first color filter film layer has a first penetrating light wave band, and the second color filter film layer at least partially blocks the first penetrating light wave band;

a lens layer disposed on the light-shielding lamination layer and including a plurality of lenses; and

a plurality of light-transmitting channels, each corresponding to each of the plurality of lenses, disposed through the light-shielding stack and surrounded by the light-shielding stack.

2. The optical sensing module of claim 1, wherein the light-shielding stack further comprises a third color filter film layer stacked on a side of the second color filter film layer facing the lens layer.

3. 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.

4. The optical sensing module of claim 3, wherein the infrared shield is a green filter film.

5. The optical sensing module of claim 4, wherein the infrared shielding member extends from the plurality of light transmitting channels to the light shielding laminate to connect with one of the different color filter layers of the light shielding laminate.

6. The optical sensing module of claim 5, wherein the first color filter layer is a green filter layer, and the infrared shielding member is connected to the first color filter layer.

7. 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 lamination layer and the lens layer; or a combination thereof, and,

wherein each of the plurality of light-transmitting channels is disposed through the at least one transparent compensation layer corresponding to each of the plurality of lenses and surrounded by the at least one transparent compensation layer.

8. The optical sensing module of claim 7, wherein the at least one transparent compensation layer is formed of an organic material.

9. The optical sensing module of claim 8, wherein the at least one transparent compensation layer is made of a light transmissive material of OC, POC or PS.

10. The optical sensing module of claim 1 or 2, wherein an area of each of the plurality of light-transmitting channels, taken parallel to the photosensitive element layer, increases along a direction from the photosensitive element layer toward the lens layer.

11. The optical sensing module of claim 1 or 2, further comprising a black matrix layer, a passivation layer, or a combination thereof disposed between the photosensitive element layer and the light-shielding stack, and each of the plurality of light-transmitting channels is disposed through and surrounded by the black matrix layer, the passivation layer, or a combination thereof corresponding to each of the plurality of lenses.

12. 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%.

13. The optical sensing module of claim 1 or 2, wherein a light-gathering focus of each of the plurality of lenses falls within the photosensitive element layer.