TWI749864B - 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 invention relates to an optical sensing module. Specifically, the present invention relates to an optical sensing module having a plurality of color filter film layers stacked.

Many optical sensors can use the incidence of light and the distribution map of the light corresponding to each optical sensing unit to perform the desired sensing action. In addition, a common optical sensor can use a microlens condensing layer to focus and project light onto a sensor element located at the focal length, so as to read the characteristic information of light incidence and distribution. For example, optical sensors can be used for biometric identification, such as fingerprints, palm prints, retina, iris, vein distribution, etc., as a digital device for personal information protection or use switching, and can be used to improve information confidentiality and security . Therefore, such optical sensors with light and thin 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 the unexpected incidence of light from different angles, resulting in optical sensing defects such as cross talk. Wait.

In order to solve the above-mentioned 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 incidence. However, a single-layer black matrix layer may only have a light-shielding effect on light incident at a specific angle, and therefore, it is necessary to provide multiple black matrix layers to shield light incident from different angles. In addition, in the currently widely used manufacturing process, if a black matrix layer needs to be provided, it may unnecessarily increase the conversion process and the consumption of production capacity, which is not conducive to reducing manufacturing costs and increasing manufacturing efficiency.

Technical means to solve the problem

In order to solve the above-mentioned problems, an optical sensing module is provided according to an embodiment of the present invention, 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 transmission light wavelength band, and the second color filter film layer at least partially blocks the first transmission light wavelength band; The layer is arranged on the light-shielding laminate and includes a plurality of lenses; and a plurality of light-transmitting channels, respectively corresponding to each of the plurality of lenses, are provided through the light-shielding laminate and surrounded by the light-shielding laminate.

Compare the effects of previous technologies

According to the optical sensing module provided by various embodiments of the present invention, it is possible to reduce or avoid non-target light incident and be sensed, thereby reducing or avoiding possible erroneous optical sensing results. In this way, the resolution of the optical sensing module can be increased and the occurrence of crosstalk and other phenomena can be reduced. In addition, the optical sensing module according to the various embodiments of the present invention can reduce the number of black matrix layers, and thus reduce or reduce the production capacity that may be consumed in the process of providing the black matrix layers. Furthermore, the optical sensing module according to each embodiment of the present invention can further reduce the reflection interference of non-target light 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 be able to easily understand the spirit and principle of the present invention by referring to the accompanying drawings. However, although some specific embodiments will be specifically described in the text, these embodiments are only illustrative, and are not regarded as restrictive or exhaustive in every respect. Therefore, for those with ordinary knowledge in the technical field, various changes and modifications to the present invention should be obvious and easily reachable without departing from the spirit and principle of the present invention.

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 laminate 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 laminated layer 300. The lens 210 may be a micro lens, such as but not limited to a micro lens with a height of 3.5 μm to 4.2 μm. 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.

Continuing, refer to FIG. 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-transmitting channels 400, each of the plurality of light-transmitting channels 400 is respectively corresponding to each of the plurality of lenses 210, is disposed through the light-shielding laminate 300, and is surrounded by the light-shielding laminate 300. Among them, 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 it is configured that the photosensitive element layer 100 does not receive infrared rays or is easily interfered by infrared rays, the infrared shield 500 can be at least partially or completely filled in the light-transmitting channel 400. In this way, infrared rays can be prevented from being incident on the photosensitive element layer 100 through the light-transmitting channel 400. Furthermore, according to an embodiment, the infrared shield 500 may be, for example, a green filter film that can block infrared. However, the aforementioned materials or substances that can be used as the infrared shield 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 material, or may be filled with material other than the infrared shield 500.

According to this embodiment, the light-shielding laminate 300 surrounding the light transmission channel 400 may be formed by stacking a plurality of different color filter film layers. For example, as shown in FIG. 1B, the light-shielding laminate 300 may have at least a first color filter film layer 310 and a second color filter film layer 320 sequentially stacked from the photosensitive element layer 100 toward the lens layer 200. Wherein, the first color filter film layer 310 has a first transmission light waveband, and the second color filter film layer 320 has a second transmission light waveband. The first penetrating light waveband and the second penetrating light waveband do not completely overlap each other, and the second color filter film layer 320 at least partially blocks the first penetrating light waveband.

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

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

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, respectively, corresponding to the respective lenses 210 to form a set of optical sensing. unit. In addition, 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 photosensitive element layer 100 can receive and sense the light incident therethrough through a specific angle (for example, a forward angle) and passing through the respective light-transmitting channels 400. Specifically, since light that is not incident from a specific expected angle will be blocked due to the influence of different wavelength band limits of different color filter layers, it is difficult to enter the photosensitive element layer 100 through the light-shielding laminate 300. Therefore, according to this embodiment, in addition to the light that can pass through the light-transmitting channel 400, it is possible to reduce or avoid light incident at an unexpected angle to be sensed, thereby reducing or avoiding possible erroneous optical sensing results. In particular, when errors such as misalignment occur during module preparation, the defects of non-target small-angle light incidence may increase. In conclusion, the present embodiment can greatly improve this defect, and it is not necessary to provide a multi-layer black matrix layer for various possible incident angles. In this way, 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 is not required or reduced, and the production capacity that may be consumed in the process of disposing the black matrix layer can 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 color filter manufacturing processes or equipment. 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 layer, it can be seen that the black matrix layer BM (the BM 1 and BM 2 materials shown in FIG. 1D) has an average High reflectivity (for example, reflectivity> 10% on average), and at least two different color filter layers of red filter film layer R, green filter film layer G, and blue filter film layer B are stacked on each other The resulting material layer has an average low optical reflectivity (for example, the average reflectivity is ≤5%). Continuing from the above, the black matrix layer BM shown in the upper left corner of Fig. 1D (BM 1 material shown in Fig. 1D) and the red filter film layer R and the green filter film layer G shown in the lower right corner , The reflection effect of the photo of the three-layer stack of blue filter film B also shows this point. Among them, the photo of the black matrix layer BM in the upper left corner (the BM 1 material shown in Figure 1D) shows a clear reflection image, while the photo of the color filter layer stack in the lower right corner shows a darker and pure black appearance. . That is, according to various embodiments of the present invention, the light-shielding laminate 300 formed by stacking different color filter layers on each other can not only reduce the incidence of incident light at unexpected angles into the photosensitive element layer 100, but also further make the After the target light enters, it is more absorbed and no longer reflected, thereby reducing the interference of the reflected light reflected by the non-target light entering and the appearance change of the optical sensing module 10.

According to some embodiments, due to the thickness of the respective color filter film layers, the light-shielding laminate 300 formed by stacking a plurality of color filter film layers on top of each other can have an average thickness of 9 um or more, and can be used as each lens 210 The thickness of the interval required 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 um in order to particularly reduce the reflectivity, the black matrix layer BM with lower reflectivity (BM 3 as shown in FIG. 1D) The thickness of the material) will not be enough as the interval thickness required for the focusing of each lens 210, and it needs to be filled in as the interval thickness required for the focusing of each lens 210.

Next, please refer to FIG. 1E. According to a modified embodiment 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-sectional view parallel to the photosensitive element layer 100 The area can 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' according to the variation of the first embodiment shown in FIG. 1E, the light transmission channel 405 is different from the light transmission channel 400 shown in FIG. Shrink the caliber. Thereby, the incident light focused by each lens 210 of the lens layer 200 can be guided, and the light-shielding stack 300 surrounding the light transmission channel 405 can limit the incident angle of the light that can enter the photosensitive element layer 100, thereby greatly reducing or Avoid light incident from unexpected angles. In addition, based on this configuration, the crosstalk problem that may occur between the optical sensing units corresponding to the adjacent lenses 210 can be further improved, thereby improving the resolution and accuracy of the optical sensing module 10'.

Next, with further reference to FIG. 2, the optical sensing module 20 according to the second embodiment of the present invention, compared with the above-mentioned optical sensing module 10' shown in FIG. 1E, is different in that the optical sensing module 20 is The light-shielding stack 300 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 film layer 310 and the second color filter film layer 320, the third color filter film layer 330 can be selected from a red filter film layer, a green filter film layer, Color filter film layers such as blue filter film layer, cyan filter film layer, yellow filter film layer, magenta filter film layer, etc. For example, in this embodiment, the first color filter film layer 310 may be a red filter film layer, the second color filter film layer 320 may be a green filter film layer, and the third color filter film layer 330 may be a blue filter film layer, so that the relatively corresponding transmitted light wavelength 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 unexpected angle can be sequentially blocked when passing through the light-shielding laminate 300, thereby reducing or preventing non-target light from entering the photosensitive element layer 100. However, the above-mentioned color types and color combinations of the color filter film layers are only examples, and different 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 to this. That is, in addition to the two-layer and three-layer color filter layers exemplarily drawn in this specification, other embodiments of 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-transmitting channels 405 The filled infrared shield 500 extends from the plurality of light-transmitting channels 405 to the light-shielding stack 300 to be connected to 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 shield 500 filled in the light-transmitting channel 405 extends from the light-transmitting channel 405 to the light-shielding stack 300 to be connected to the second color filter layer 320. According to some embodiments, the infrared shield 500 is a green filter film layer, and the second color filter film layer 320 connected to it is also a green filter film layer. In conclusion, in some embodiments, a green filter film 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 film layer. However, the foregoing is only an example, and the present invention is not limited thereto, and when the infrared shield 500 is connected to a color filter film layer, the infrared shield 500 and the color filter film layer may be integrally formed or Separate molding.

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 color filter film layer, such as the second color filter film layer 320, is slightly misaligned or shifted. However, what is shown here is only an example, and the misalignment or offset may not exist according to other embodiments of the present invention.

Next, referring to FIG. 4, the optical sensing module 40 according to the fourth embodiment of the present invention differs from the optical sensing module 30 shown in FIG. 3 in that it extends from the light transmission channel 405 to the light-shielding laminate The infrared shield 500 of 300 is connected to the first color filter layer 310. For example, the first color filter film layer 310 is a green filter film layer, and the infrared shield 500 is also a green filter film 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 together with the process of forming the first color filter layer 310, and because it is located at the bottom of the light shielding laminate 300, the filling shape of the infrared shield 500 along the light transmission channel 405 can be reduced or avoided. And deform or shift. In addition, except for the difference in the position and distribution of the infrared shield 500 and the color filter layer connected to it, the implementation principle of this embodiment is similar to the embodiment described in FIG. 3, and will not be repeated here. .

Next, referring to FIG. 5, the optical sensing module 50 according to the fifth embodiment of the present invention differs from the optical sensing module 30 shown in FIG. 3 in that it further includes a transparent compensation layer 620 disposed on Between the light shielding stack 300 and the lens layer 200. Wherein, each of the plurality of light-transmitting channels 405 may correspond to each of the plurality of lenses 210, pass through the transparent compensation layer 620, and be 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 light-transmitting materials such as OC (Overcoat), POC (Photo Overcoat), or PS (Photo spacer). However, the above is only an example, and the present invention is not limited thereto. For example, in other embodiments, the transparent compensation layer 620 may 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.

In conclusion, if the thickness of the light-shielding laminate 300 is insufficient, the transparent compensation layer 620 can further increase the thickness of the interval between the lens layer 200 and the photosensitive element layer 100 without hindering the incidence of light. In this way, 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 light is refracted and focused through the lens 210 and enters the optical sensing module 50, the light can be focused and incident to 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 providing the transparent compensation layer 620. For example, according to this embodiment, the transparent compensation layer 620 can be used to relieve the stress applied to the optical sensing module 50.

Furthermore, 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 distance g between the lenses 210 can be adjusted by providing a transparent compensation layer 620. Specifically, when the lenses 210 are formed (such as molding or laying), they may be attracted to each other due to, for example, but not limited to, capillary phenomena, and thus cannot be individually molded. Therefore, it is necessary to maintain a certain distance g between the lenses 210 to form the individual lenses 210 independently and without interference. 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 addition, when a light-transmitting material such as POC (Photo Overcoat) or PS (Photo spacer) is used as the transparent compensation layer 620, the spacing g can be further reduced to 3.3 µm and 4.7 µm, respectively. Therefore, the filling rate (for example, the density) of the lens 210 can be increased, and the resolution of the overall photosensitivity can be increased.

Next, referring to FIG. 7, the optical sensing module 70 according to the seventh embodiment of the present invention differs from the optical sensing module 50 shown in FIG. 5 in that it can further include a transparent compensation layer 620 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 laminate 300 and the photosensitive element layer 100; and between the light-shielding laminate 300 and the lens layer 200. In view of the foregoing, the function of the transparent compensation layer 610 can be at least partially the same or similar to that of the transparent compensation layer 620, and can 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 incidence of light. Alternatively, the transparent compensation layer 610 can be provided to adjust, for example, to relieve the 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, it is also possible to only provide the transparent compensation layer 610 on the light-shielding laminate 300 and the photosensitive element layer 100 There is no transparent compensation layer 620 in between. In conclusion, according to the various embodiments of the present invention, 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 are not limited to those specifically illustrated here under the condition of satisfying light transmission. And the state of the description.

Next, referring to FIG. 8, the optical sensing module 80 according to the eighth embodiment of the present invention differs from the optical sensing module 50 shown in FIG. 5 in that it may further include a transparent compensation layer 620 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 providing the light-shielding stack 300, according to some embodiments of the present invention, the provision of a single-layer black matrix layer 710 is not excluded. In particular, a single black matrix layer 710 can be provided on the photosensitive element layer 100. In this way, it can block any light that may enter the photosensitive element layer 100 by bypassing the light-shielding laminate 300, or it may block the light that may be generated by the optical sensing module 80 itself and enter the photosensitive element layer 100 without being blocked by the light-shielding laminate 300. The light leakage. In addition, when it is necessary to transfer the semi-finished product to another factory for other manufacturing processes, a passivation protective layer 720 can be further provided on the semi-finished product to protect the semi-finished product. For example, after forming the photosensitive element layer 100 and the black matrix layer 710, in order to transfer to another factory where the color filter film layer can be prepared, a passivation protection layer 720 can be further formed on the black matrix layer 710 for the purpose of transferring Protect the semi-finished products including the photosensitive element layer 100 and the black matrix layer 710. However, the above are only examples, and the positions and timings 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.

In summary, according to various embodiments of the present invention, each of the plurality of light-transmitting channels 405 corresponds to each of the plurality of lenses 210 and is provided through the black matrix layer 710, the passivation protection layer 720, or a combination thereof, and It is surrounded by the black matrix layer 710, the 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 light incident situation 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 components shown in the above embodiments, and is different from the optical sensing module 80 shown in FIG. 8 It includes two transparent compensation layers 610 and 620 instead of one transparent compensation layer 620.

10A, since the focal point F of each of the plurality of lenses 210 falls on the photosensitive element layer 100, when the light L1 from the expected direction and angle (for example, within 10 degrees of the forward deviation) enters the lens 210 In the optical sensing unit, the lens 210 can refract and focus the light L1 through the light-transmitting channel 405 to reach the focusing focus F located in the photosensitive element layer 100. Thereby, the photosensitive element layer 100 can receive and sense the target light L1 from the expected direction and angle.

In contrast, referring to FIG. 10B, when light L2 from an unexpected direction and angle is incident on the optical sensing module 90 according to this embodiment, the light L2 will be at least partially incident upon the light-shielding laminate 300 directly. It is blocked or at least partially blocked when it is refracted by the lens 210 and hits 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 light from other optical sensing units. 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 spacing 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 part of the light L3 that can pass through the light-shielding laminate 300, or bypass the light-shielding laminate 300, or enter between the light-shielding laminate 300 and the photosensitive element layer 100. The light source generates and enters. In addition, such 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 conclusion, 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 may not be provided.

Next, according to the optical sensing module 80 of the eighth embodiment shown in FIG. 8 as an example, the result of the experiment of the light collection efficiency of the photosensitive element layer 100 is shown in FIG. 11. Specifically, when light is collected by the optical sensing module 80 of the eighth embodiment shown in FIG. 8, the direction substantially perpendicular to each layer of the optical sensing module 80 is taken as the positive direction 0 degree, It can be seen that the light incident within about 10 degrees of forward deviation can be received and sensed by the photosensitive element layer 100. However, the light incident in an angular direction other than the forward deviation of 10 degrees is not or difficult to be received and sensed by the photosensitive element layer 100. In conclusion, it can be seen from the experimental results that according to this 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 module 10-90 in combination with other modules according to various embodiments of the present invention will be further described.

12, according to an embodiment of the present invention, the optical sensing modules 10-90 of the various embodiments described above with reference to FIGS. 1A to 11 can be further combined with the display module 800 to form an optical sensor module. Display device 1000 with 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 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 sensor module 10-90 can be, for example, a fingerprint sensor (FPS, Finger Print Sensor), and when the finger 15 is pressed, it can sense the information incident through the finger 15 The light transmittance spectrum of the light can be used to identify fingerprints and other biological characteristics. As mentioned above, when an operator presses his finger 15 on the display device 1000, the presence and distribution of light incident through the finger 15 can be sensed by the optical sensing module 10-90 under the display module 800. Through this, fingerprint recognition can be used to perform related electronic tasks.

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. Thereby, when the display device 1000 is prepared, the display module 800 and the optical sensing module 10-90 can be prepared by using similar and the same manufacturing process or equipment, thereby improving the efficiency and convenience of preparation, and reducing the loss of production capacity. Or increase in cost.

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

In summary, 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 the various embodiments of the present invention, the loss of productivity due to the provision of the black matrix layer can be reduced or avoided.

The above are only some preferred embodiments of the present invention. It should be noted that various changes and modifications can be made to the present invention without departing from the spirit and principle of the present invention. Those with ordinary knowledge in the technical field should understand that the present invention is defined by the scope of the attached patent application, and all possible substitutions, combinations, modifications, and conversions are not beyond the scope of the present invention under the intent of the present invention. The scope defined by the scope of the attached 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: shading stack 310: The first color filter film 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 protection layer 800: display module 805: OLED 900: Cover glass 1000: display device F: Spotlight L1, L2, L3: light R: Red filter film G: Green filter film B: Blue filter film

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 part of the optical sensor module taken along the line A-A' of Fig. 1A according to the first embodiment of the present invention.

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

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

Fig. 1E is an enlarged cross-sectional view of a part of the optical sensor module taken along the line A-A' of Fig. 1A according to a modified embodiment of the first embodiment of the present invention.

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

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

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

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

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

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

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

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

10A and 10B are schematic diagrams of the optical path simulation of the optical sensing module in FIG. 9 under various light incidents.

FIG. 11 is a schematic diagram of the light collection efficiency of the photosensitive element layer of the optical sensor module shown in FIG. 8 to light incident 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 film layer

320: The second color filter layer

300: shading stack

400: light transmission channel

500: Infrared shield

Claims (12)

An optical sensing module, comprising: a photosensitive element layer; a light-shielding laminated layer arranged on the photosensitive element layer, and at least a first color filter film layer and a second color filter film layer and a second layer are sequentially stacked from the photosensitive element layer The color filter film layer, wherein 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; a lens layer is provided On the light-shielding laminate, and comprising a plurality of lenses; a plurality of light-transmitting channels, respectively corresponding to each of the plurality of lenses, pass through the light-shielding laminate and be surrounded by the light-shielding laminate; and at least A transparent compensation layer disposed between the light-shielding laminate and the photosensitive element layer, between the light-shielding laminate and the lens layer, or a combination thereof, and wherein each of the plurality of light-transmitting channels corresponds to the Each of the plurality of lenses is disposed through the at least one transparent compensation layer and is surrounded by the at least one transparent compensation layer. The optical sensing module according to claim 1, wherein the light-shielding laminated layer further comprises a third color filter film layer stacked on a side of the second color filter film layer facing the lens layer. The optical sensing module according to 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 according to claim 3, wherein the infrared shield is a green filter film layer. The optical sensing module according to claim 4, wherein the infrared shield extends from the plurality of light-transmitting channels to the light-shielding stack to correspond to one of the different color filter layers of the light-shielding stack connect. The optical sensing module according to claim 5, wherein the first color filter film layer is a green filter film layer, and the infrared shield is connected to the first color filter film layer. The optical sensing module according to claim 1, wherein the at least one transparent compensation layer is formed of an organic material. The optical sensing module according to claim 7, wherein the at least one transparent compensation layer is composed of light-transmitting materials of OC (Overcoat), POC (Photo Overcoat), or PS (Photo spacer). The optical sensing module according to claim 1 or 2, wherein the light-shielding laminate layer on which the first color filter film layer and the second color filter film layer are at least sequentially stacked is surrounded and defined by The cross-sectional area of each of the plurality of light-transmitting channels parallel to the photosensitive element layer gradually increases along the direction from the photosensitive element layer toward the lens layer. 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 laminate, and the plurality of transparent Each of the light channels corresponds to each of the plurality of lenses, passes 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 according to claim 1 or 2, wherein the optical reflectivity of the light-shielding laminate 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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