An optical recognition module and a display panel

Abstract

The present invention provides an optical recognition module and a display panel. The optical recognition module includes a substrate, a recognition structure, and a collimated optical path structure. The recognition structure is disposed on the substrate, and the collimated optical path structure is disposed on the light incident side of the recognition structure. The optical recognition module further includes a non-visible light filtering structure, which is disposed in the collimated optical path structure and is used to filter non-visible light rays incident on the recognition structure. By providing the non-visible light filtering structure in the collimated optical path structure, the optical recognition module can filter non-visible light rays incident on the collimated optical path structure, prevent non-visible light from passing through the object to be recognized and entering the recognition structure, thereby reducing or eliminating the influence of non-visible light with strong light intensity on the signal formed by the light reflected by the object to be recognized to the recognition structure, and further ensuring the accuracy of the recognition structure in recognizing the object to be recognized.

Description

Technical Field

[0001] The present invention belongs to the technical field of displays, and particularly relates to an optical recognition module and a display panel. Background Art

[0002] Due to the uniqueness of fingerprint features, fingerprint recognition, as a biometric recognition method, is widely used in scenarios such as under-screen unlocking of mobile phones, and the audience is very extensive. Among common fingerprint sensors currently, optical fingerprint sensors have obvious advantages over other sensors because they can be placed under the screen and have low costs.

[0003] In an optical fingerprint sensor, a collimation optical path is a key component for fingerprint imaging. It enables the optical fingerprint signal passing through the screen to be clearly imaged on the fingerprint sensor in a collimated manner, thereby realizing the recognition of fingerprints.

[0004] Existing under-screen optical fingerprint sensors need to solve the problem of imaging and unlocking in sunlight. Most of the non-visible light with strong light intensity (such as infrared light, ultraviolet light, etc.) after passing through the finger will be emitted and incident on the optical fingerprint sensor. The light with strong light intensity in this part easily submerges the fingerprint signal obtained from the light reflected by the fingerprint through the screen in this strong light signal, resulting in the inability to distinguish the fingerprint signal. Summary of the Invention

[0005] Aiming at the problem that non-visible light in sunlight is incident on the optical fingerprint sensor after passing through the finger, submerging the fingerprint signal and making it impossible to distinguish the fingerprint signal, the present invention provides an optical recognition module and a display panel. This optical recognition module can filter out non-visible light incident on the collimation optical path structure, avoid non-visible light passing through the object to be recognized and entering the recognition structure, thereby reducing or eliminating the influence of non-visible light with strong light intensity on the signal formed by the light reflected by the object to be recognized and incident on the recognition structure, and further ensuring the accuracy of the recognition structure in recognizing the object to be recognized.

[0006] The present invention provides an optical recognition module, including a substrate, a recognition structure, and a collimation optical path structure. The recognition structure is arranged on the substrate, the collimation optical path structure is arranged on the light incident side of the recognition structure, and further includes a non-visible light filtering structure. The non-visible light filtering structure is arranged in the collimation optical path structure and is used to filter out non-visible light rays incident on the recognition structure.

[0007] Optionally, it further includes a liquid and vapor filtering structure. The liquid and vapor filtering structure is arranged in the collimation optical path structure and is used to filter out liquid droplets and liquid vapor entering the collimation optical path structure.

[0008] Optionally, the collimation optical path structure includes a collimation layer and a microlens layer. The collimation layer and the microlens layer are stacked on top of each other, and the collimation layer is closer to the recognition structure than the microlens layer;

[0009] The non-visible light filtering structure is disposed between the collimating layer and the microlens layer.

[0010] Optionally, the collimating optical path structure further includes a support layer, and the support layer is disposed between the collimating layer and the microlens layer;

[0011] The non-visible light filtering structure is disposed on a side of the support layer close to the collimating layer, and / or the non-visible light filtering structure is disposed on a side of the support layer close to the microlens layer.

[0012] Optionally, the collimating optical path structure includes a collimating layer, a support layer, and a microlens layer, the collimating layer, the support layer, and the microlens layer are stacked in sequence, and the collimating layer is closer to the recognition structure than the microlens layer;

[0013] The non-visible light filtering structure is disposed on a side of the microlens layer facing away from the recognition structure.

[0014] Optionally, the microlens layer includes a microlens array and a protective layer, and the protective layer is disposed on an incident light side of the microlens array;

[0015] The non-visible light filtering structure is reused as the protective layer.

[0016] Optionally, the collimating optical path structure includes a collimating layer, a support layer, and a microlens layer, the collimating layer, the support layer, and the microlens layer are stacked in sequence, and the collimating layer is closer to the recognition structure than the microlens layer;

[0017] The non-visible light filtering structure is disposed on a side of the collimating layer close to the recognition structure.

[0018] Optionally, the collimating layer includes a substrate and a plurality of through holes formed in the substrate, and the plurality of through holes are uniformly distributed;

[0019] The non-visible light filtering structure further extends into the through holes.

[0020] Optionally, the liquid-vapor filtering structure is disposed on a side of the recognition structure close to the collimating optical path structure.

[0021] Optionally, the collimating layer includes a substrate and a plurality of through holes formed in the substrate, and the plurality of through holes are uniformly distributed;

[0022] The liquid-vapor filtering structure is disposed on a side of the recognition structure close to the collimating optical path structure, and the liquid-vapor filtering structure further extends to cover side walls of the through holes and an opening at one end of the through holes away from the recognition structure.

[0023] Optionally, the liquid-vapor filtering structure also extends to fill each of the through holes.

[0024] Optionally, the non-visible light filtering structure is made of a light-transmitting resin material capable of absorbing non-visible light;

[0025] Alternatively, the non-visible light filtering structure includes at least one stacked structure formed by stacking silicon oxide and titanium oxide.

[0026] Optionally, the liquid-vapor filtering structure is made of any one or two of silicon nitride, silicon oxide, indium tin oxide, silicone, and waterproof glue.

[0027] The present invention also provides a display panel, including a display module and further including the above optical recognition module;

[0028] The optical recognition module is disposed on the back side facing away from the display side of the display module, and the optical recognition module is used to recognize a touch object on the display side of the display module.

[0029] Advantages of the present invention: The optical recognition module provided by the present invention can filter out non-visible light incident on the collimated optical path structure by providing a non-visible light filtering structure in the collimated optical path structure, avoiding non-visible light from penetrating the object to be recognized and entering the recognition structure, thereby reducing or eliminating the influence of non-visible light with strong light intensity on the signal formed by the light reflected from the object to be recognized to the recognition structure, and further ensuring the accuracy of the recognition structure in recognizing the object to be recognized.

[0030] The display panel provided by the present invention can improve the accuracy of under-screen recognition of the display panel by adopting the above optical recognition module. Description of the Drawings

[0031] Figure 1 It is a schematic cross-sectional view of the structure of an optical recognition module in an embodiment of the present invention;

[0032] Figure 2 It is a schematic cross-sectional view of the structure of another optical recognition module in an embodiment of the present invention;

[0033] Figure 3 It is a schematic cross-sectional view of the structure of yet another optical recognition module in an embodiment of the present invention;

[0034] Figure 4 It is a schematic cross-sectional view of the structure of yet another optical recognition module in an embodiment of the present invention;

[0035] Figure 5 It is a schematic cross-sectional view of the structure of yet another optical recognition module in an embodiment of the present invention;

[0036] Figure 6A schematic cross-sectional view of another optical recognition module in an embodiment of the present invention;

[0037] Figure 7 A schematic cross-sectional view of another optical recognition module in an embodiment of the present invention;

[0038] Figure 8 A schematic cross-sectional view of another optical recognition module in an embodiment of the present invention;

[0039] Figure 9 A schematic cross-sectional view of a display panel in an embodiment of the present invention.

[0040] Wherein the reference numerals are:

[0041] 1, substrate; 2, recognition structure; 21, sensor unit; 211, thin film transistor; 212, photodiode; 22, light-transmitting insulating layer; 23, shielding layer; 3, collimating optical path structure; 31, collimating layer; 311, substrate; 312, through hole; 32, microlens layer; 321, microlens array; 322, protective layer; 33, support layer; 4, non-visible light filtering structure; 5, liquid-vapor filtering structure; 6, display module; 7, optical recognition module; 8, optically transparent adhesive layer. Detailed implementation manners

[0042] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners for an optical recognition module and a display panel.

[0043] An embodiment of the present invention provides an optical recognition module, as Figure 1 and Figure 2 shown, including a substrate 1, a recognition structure 2, and a collimating optical path structure 3. The recognition structure 2 is disposed on the substrate 1, the collimating optical path structure 3 is disposed on the light incident side of the recognition structure 2, and further includes a non-visible light filtering structure 4. The non-visible light filtering structure 4 is disposed in the collimating optical path structure 3 for filtering non-visible light rays incident on the recognition structure 2.

[0044] Among them, the optical recognition module is arranged on the back side of the display screen away from its display side, and optically recognizes the touch object (such as a finger) on the display side of the display screen, that is, under-screen optical recognition. The principle of the optical recognition module for recognizing the finger touching the display side of the display screen is as follows: The display screen senses the finger contact and emits light with a relatively high brightness in the contact area to irradiate the finger. Under the reflection of the finger, the light acquires the fingerprint texture of the finger and carries the finger fingerprint information through the display screen and enters the recognition structure 2. The collimation optical path structure 3 converges and collimates the light passing through the display screen, filters out the light at large angles, and ensures that the light signal crosstalk passing through the collimation optical path structure 3 is very small or there is no crosstalk. The light passing through the collimation optical path structure 3 directly enters the recognition structure 2, and the recognition structure 2 can convert the optical signal into an electrical signal, thereby realizing the recognition of the finger fingerprint. During this process, non-visible light (such as infrared light, ultraviolet light, etc.) in the external sunlight will penetrate the finger and irradiate the recognition structure 2 through the collimation optical path structure 3. The light intensity of the non-visible light is stronger than that of the finger-reflected light, and it is easy to submerge the fingerprint reflected light signal.

[0045] By arranging the non-visible light filtering structure 4 in the collimation optical path structure 3, the non-visible light incident on the collimation optical path structure 3 can be filtered out, avoiding the non-visible light from penetrating the object to be recognized (such as a finger) and entering the recognition structure 2, thereby reducing or eliminating the influence of the non-visible light with a stronger light intensity on the signal formed by the light reflected by the object to be recognized and entering the recognition structure 2, and further ensuring the accuracy of the recognition structure 2 in recognizing the object to be recognized.

[0046] Optionally, in this embodiment, the optical recognition module further includes a liquid and vapor filtering structure 5. The liquid and vapor filtering structure 5 is arranged in the collimation optical path structure 3 and is used to filter out the droplets and liquid vapor entering the collimation optical path structure 3. Since droplets and liquid vapor (such as water droplets and water vapor) in the external environment are likely to enter the optical recognition module, causing damage and deformation to the optical path structure in the optical recognition module and resulting in abnormal use, by arranging the liquid and vapor filtering structure 5 in the collimation optical path structure 3, it is possible to avoid the droplets and liquid vapor invading the optical recognition module from damaging the optical path structure therein, thereby ensuring the recognition accuracy of the optical recognition module.

[0047] Optionally, as Figure 1 shown, the collimation optical path structure 3 includes a collimation layer 31 and a microlens layer 32. The collimation layer 31 and the microlens layer 32 are stacked on top of each other, and the collimation layer 31 is closer to the recognition structure 2 than the microlens layer 32; the non-visible light filtering structure 4 is arranged between the collimation layer 31 and the microlens layer 32.

[0048] Among them, since the collimating layer 31 and the microlens layer 32 are directly stacked together, it is easy to cause damage or impairment to any one of the layers. Therefore, the non-visible light filtering structure 4 can also play a role in supporting the collimating layer 31 and the microlens layer 32, avoiding damage or impairment to any one of the collimating layer 31 and the microlens layer 32.

[0049] In addition, in this embodiment, the substrate 1 can be a glass substrate or a flexible substrate (such as a polyimide substrate). The recognition structure 2 includes a sensor unit array formed by arranging a plurality of sensor units 21 and a light-transmitting insulating layer 22 disposed on the side of the sensor unit array away from the substrate 1 and protecting it. Each sensor unit includes a thin-film transistor 211 and a photodiode 212. The photodiode 212 can convert the received optical signal into an electrical signal. The source or drain of the thin-film transistor 211 is connected to the N pole of the photodiode 212, and the P pole of the photodiode 212 is connected to the bias voltage providing terminal. The thin-film transistor 211 can be turned on or off, so as to output or not output the electrical signal converted by the photodiode 212. The light-transmitting insulating layer 22 has a relatively thick thickness and can also planarize the surface of the recognition structure 2. In addition, a shielding layer 23 is also provided on the photodiode 212, and the shielding layer 23 can shield external electromagnetic signals to avoid signal interference to the thin-film transistor 211 and the photodiode 212.

[0050] In this embodiment, the collimating layer 31 can collimate the light passing through it and output. When the light passes through the collimating layer 31, the stray light at large angles will be filtered out, thereby eliminating the optical signal crosstalk caused by the stray light at large angles and improving the image quality. The microlens layer 32 is composed of a microlens array formed by arranging a plurality of microlenses. The microlens layer 32 can converge the incident light, so that the incident light in different directions converges within a smaller angle, thereby improving the utilization rate of light in the optical recognition process.

[0051] In this embodiment, the liquid and vapor filtering structure 5 is disposed on the side of the recognition structure 2 close to the collimating optical path structure 3. It can filter out the droplets and liquid vapor entering the collimating optical path structure 3 to prevent the intrusion of droplets and liquid vapor from affecting the recognition accuracy of the optical recognition module.

[0052] Optionally, the non-visible light filtering structure 4 is made of a light-transmitting resin material capable of absorbing non-visible light. For example, a photosensitive resin material with a high light transmittance in the blue-green band and a very low light transmittance in the infrared band can be used to filter infrared light, such as acrylic resin. Alternatively, the non-visible light filtering structure 4 includes at least one stacked structure formed by stacking silicon oxide and titanium oxide. This stacked structure can reflect and interfere with the incident non-visible light, and the reflected and interfered light cancels each other out, thereby weakening or eliminating non-visible light, such as infrared light. Preferably, the non-visible light filtering structure 4 is composed of multiple stacked structures, so that the incident non-visible light, such as infrared light, can be basically eliminated. The above two types of materials for forming the non-visible light filtering structure 4 both start filtering light with a wavelength of about 600 nm (i.e., the infrared band).

[0053] Optionally, the thickness range of the non-visible light filtering structure 4 is 20 - 40 μm. The preparation process of the non-visible light filtering structure 4 can be an evaporation coating process or a sputtering coating process, or it can also be prepared by a coating process. The non-visible light filtering structure 4 can be first prepared on the collimating layer 31 to form an integrated component of the collimating layer 31 and the non-visible light filtering structure 4, and then this integrated component is set in the optical recognition module. In this way, the overall thickness of the optical recognition module can also be reduced.

[0054] Optionally, the liquid-vapor filtering structure 5 is made of any one or two of silicon nitride, silicon oxide, indium tin oxide, silicone, and waterproof glue.

[0055] Optionally, when using silicon nitride, silicon oxide, or indium tin oxide materials, the liquid-vapor filtering structure 5 can be prepared on the recognition structure 2 by a film deposition method; when using silicone or waterproof glue materials, the liquid-vapor filtering structure 5 can be prepared on the recognition structure 2 by a coating method.

[0056] Optionally, as Figure 2 shown, in the optical recognition module of this embodiment, the collimating optical path structure 3 can further include a support layer 33, and the support layer 33 is arranged between the collimating layer 31 and the microlens layer 32; the non-visible light filtering structure 4 is arranged on the side of the support layer 33 close to the collimating layer 33, and the non-visible light filtering structure 4 is arranged on the side of the support layer 33 close to the microlens layer 32. Of course, the non-visible light filtering structure 4 can also be only arranged on one side of the support layer 33, such as on the side of the support layer 33 close to the collimating layer 31 or the side close to the microlens layer 32.

[0057] Among them, due to the insufficient adhesion or flexibility of the non-visible light filtering structure 4 prepared using non-visible light absorbing materials, a suitable material (such as PET) can be selected to prepare the support layer 33, and then the non-visible light filtering structure 4 is prepared on the upper and lower surfaces of the support layer 33. On the one hand, it can achieve good support of the support layer 33 for the collimating layer 31 and the microlens layer 32. On the other hand, the setting of the non-visible light filtering structure 4 can also play a role in absorbing non-visible light.

[0058] An embodiment of the present invention also provides an optical recognition module. Different from the above embodiment, as Figure 3 shown, the collimating optical path structure 3 includes a collimating layer 31, a support layer 33, and a microlens layer 32. The collimating layer 31, the support layer 33, and the microlens layer 32 are stacked in sequence, and the collimating layer 31 is closer to the recognition structure 2 than the microlens layer 32; the non-visible light filtering structure 4 is disposed on the side of the microlens layer 32 facing away from the recognition structure 2. In this way, it can also play a role in filtering non-visible light incident on the collimating optical path structure 3 and preventing non-visible light from penetrating the object to be recognized (such as a finger) and entering the recognition structure 2.

[0059] Optionally, as Figure 4 shown, the microlens layer 32 includes a microlens array 321 and a protective layer 322. The protective layer 322 is disposed on the light incident side of the microlens array 321; the non-visible light filtering structure 4 is reused as the protective layer 322. With this setting, the thickness of the optical recognition module integrated with the non-visible light filtering structure 4 can be further reduced.

[0060] It should be noted that when the non-visible light filtering structure 4 is disposed on the side of the microlens layer 32 facing away from the recognition structure 2, the refractive index requirements for the material of the non-visible light filtering structure 4 are relatively strict, and it should be able to cooperate with the microlens layer 32 to converge light, so that incident light from different directions converges within a smaller angle, thereby improving the utilization rate of light in the optical recognition process.

[0061] The other structures and material settings of the optical recognition module in this embodiment are the same as those in the above embodiment, and will not be elaborated here.

[0062] An embodiment of the present invention also provides an optical recognition module. Different from the above embodiment, as Figure 5As shown in the figure, the collimating optical path structure 3 includes a collimating layer 31, a support layer 33, and a microlens layer 32. The collimating layer 31, the support layer 33, and the microlens layer 32 are stacked in sequence, and the collimating layer 31 is closer to the recognition structure 2 than the microlens layer 32. The non-visible light filtering structure 4 is disposed on the side of the collimating layer 31 closer to the recognition structure 2. And the non-visible light filtering structure 4 is closer to the collimating layer 31 than the liquid and vapor filtering structure 5. In this way, it can also filter out the non-visible light incident into the collimating optical path structure 3 and prevent the non-visible light from penetrating the object to be recognized (such as a finger) and entering the recognition structure 2.

[0063] Optionally, as Figure 6 shown, the collimating layer 31 includes a substrate 311 and a plurality of through holes 312 formed in the substrate 311. The plurality of through holes 312 are evenly distributed; the non-visible light filtering structure 4 also extends into the through holes 312. Further optionally, the non-visible light filtering structure 4 fills the through holes 312. Since both visible light and non-visible light need to be collimated through the through holes 312, it is only necessary to filter out the non-visible light in the through holes 312. With such a setting, the thickness of the optical recognition module integrated with the non-visible light filtering structure 4 can be further reduced.

[0064] In this embodiment, the other structures and material settings of the optical recognition module are the same as those in the above embodiment, and will not be elaborated here.

[0065] The embodiment of the present invention also provides an optical recognition module. Different from the above embodiment, as Figure 7 shown, the collimating layer 31 includes a substrate 311 and a plurality of through holes 312 formed in the substrate 311. The plurality of through holes 312 are evenly distributed; the liquid and vapor filtering structure 5 is disposed on the side of the recognition structure 2 closer to the collimating optical path structure 3, and the liquid and vapor filtering structure 5 also extends to cover the side walls of the through holes 312 and the opening at the end of the through holes 312 away from the recognition structure 2. With such a setting, on the one hand, it can prevent the liquid droplets and liquid vapor invading the optical recognition module from damaging the optical path structure therein, thereby ensuring the recognition accuracy of the optical recognition module; on the other hand, it can further reduce the thickness of the optical recognition module integrated with the non-visible light filtering structure 4.

[0066] Among them, for the preparation of the liquid and vapor filtering structure 5, the non-visible light filtering structure 4 can be first prepared on the collimating layer 31, and then the liquid and vapor filtering structure 5 is prepared on the side of the collimating layer 31 facing away from the non-visible light filtering structure 4. In this way, the liquid and vapor filtering structure 5 can be formed on the side walls of the through holes 312 and the opening at the end of the through holes 312 away from the recognition structure 2 (this part of the liquid and vapor filtering structure 5 at the opening is actually formed on the non-visible light filtering structure 4). That is, the non-visible light filtering structure 4, the collimating layer 31, and the liquid and vapor filtering structure 5 are integrated into one, and then the integrated component is set in the optical recognition module.

[0067] Further optionally, if Figure 8 As shown, the liquid vapor filter structure 5 also extends to fill each through hole 312. In this case, the material of the liquid vapor filter structure 5 needs to be selected according to the influence of the material refractive index on the light path, so that when the liquid vapor filter structure 5 fills each through hole 312, it will not affect the collimation function of the collimation layer 31 on the light.

[0068] The other structures and material settings of the optical recognition module in this embodiment are the same as those in the above embodiment and will not be repeated here.

[0069] The optical recognition module provided by the above-mentioned embodiment of the present invention can filter out the non-visible light incident into the collimated light path structure by setting a non-visible light filtering structure in the collimated light path structure, thereby preventing the non-visible light from penetrating the object to be identified and entering the recognition structure, thereby reducing or eliminating the influence of non-visible light with stronger light intensity on the signal formed by the light reflected from the object to be identified to the recognition structure, thereby ensuring the accuracy of the recognition structure in identifying the object to be identified.

[0070] The embodiment of the present invention further provides a display panel, such as Figure 9 As shown, the display module 6 is included, and the optical recognition module 7 in any of the above embodiments is also included; the optical recognition module 7 is arranged on the back side away from the display side of the display module 6, and the optical recognition module 7 is used to recognize the touch object on the display side of the display module 6. That is, the setting of the optical recognition module 7 enables the display panel to realize under-screen recognition.

[0071] Optionally, the optical recognition module 7 and the display module 6 are bonded together by an optically transparent adhesive layer 8, so as to achieve a tight combination between the optical recognition module 7 and the display module 6. The thickness of the optically transparent adhesive layer 8 may be 10-20 μm.

[0072] Optionally, an air barrier may be provided between the optical recognition module 7 and the display module 6, and the air barrier can realize non-tight combination between the optical recognition module 7 and the display module 6. The positions of the optical recognition module 7 and the display module 6 are fixed by supporting and fixing the middle frame of the display panel, and a gap is provided between the optical recognition module 7 and the display module 6, and air is in the gap to form an air barrier.

[0073] Optionally, the display module 6 is a light-transmitting display module, such as an OLED display module.

[0074] The display panel provided in this embodiment can improve the accuracy of under-screen recognition of the display panel by adopting the optical recognition module in any of the above embodiments.

[0075] In the embodiments of the present invention, the display panel provided may be any product or component with a display function, such as an OLED panel, an OLED TV, a monitor, a mobile phone, a navigator, etc.

[0076] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. An optical recognition module, comprising a substrate, a recognition structure, and a collimated optical path structure. The recognition structure is disposed on the substrate, and the collimated optical path structure is disposed on the light incident side of the recognition structure. Characterized in that, It further comprises a non-visible light filtering structure, which is disposed in the collimated optical path structure for filtering non-visible light rays incident on the recognition structure; The collimated optical path structure includes a collimation layer, a support layer, and a microlens layer. The collimation layer, the support layer, and the microlens layer are stacked in sequence, and the collimation layer is closer to the recognition structure than the microlens layer; The non-visible light filtering structure is disposed on the side of the microlens layer facing away from the recognition structure; The microlens layer includes a microlens array and a protective layer, and the protective layer is disposed on the light incident side of the microlens array; The non-visible light filtering structure is reused as the protective layer; Alternatively, the non-visible light filtering structure is disposed on the side of the collimation layer close to the recognition structure; The collimation layer includes a substrate and a plurality of through holes formed in the substrate, and the plurality of through holes are evenly distributed; The non-visible light filtering structure also extends into the through holes.

2. The optical recognition module according to claim 1, Characterized in that, It further comprises a liquid and vapor filtering structure, which is disposed in the collimated optical path structure for filtering liquid droplets and liquid vapor entering the collimated optical path structure.

3. The optical recognition module according to claim 2, Characterized in that, The liquid and vapor filtering structure is disposed on the side of the recognition structure close to the collimated optical path structure.

4. The optical recognition module according to claim 2, Characterized in that, The collimation layer includes a substrate and a plurality of through holes formed in the substrate, and the plurality of through holes are evenly distributed; The liquid and vapor filtering structure is disposed on the side of the recognition structure close to the collimated optical path structure, and the liquid and vapor filtering structure also extends to cover the side walls of the through holes and the openings at the ends of the through holes away from the recognition structure.

5. The optical recognition module according to claim 4, Characterized in that, The liquid and vapor filtering structure also extends to fill each of the through holes.

6. The optical recognition module according to claim 1, Characterized in that, The non-visible light filtering structure is made of a light-transmitting resin material capable of absorbing non-visible light; Alternatively, the non-visible light filtering structure includes at least one stacked structure formed by stacking silicon oxide and titanium oxide.

7. The optical recognition module according to claim 2, Characterized in that, The liquid and vapor filtering structure is made of any one or two of silicon nitride, silicon oxide, indium tin oxide, silicone, and waterproof glue.

8. A display panel, comprising a display module, and further comprising the optical recognition module according to any one of claims 1-7; The optical recognition module is disposed on the back side facing away from the display side of the display module, and the optical recognition module is used to recognize a touch object on the display side of the display module.

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