Terminal device

Abstract

The present disclosure provides a terminal device. The terminal device includes a touch display layer, a fingerprint detection layer, and a shield layer. The touch display layer includes a touch display surface. The fingerprint detection layer is provided on a side of the touch display layer facing the touch display surface. The shield layer is provided on the side of the touch display layer facing the touch display surface, and a portion of the shield layer facing the fingerprint detection layer is located on the side of the fingerprint detection layer facing the touch display layer. The shield layer includes an electromagnetic shield layer connected to a ground end of the terminal device, and at least a portion of the electromagnetic shield layer is located on the side of the fingerprint detection layer facing the touch display layer. The electromagnetic shield layer in the terminal device can effectively protect the portion of the touch display layer facing the fingerprint detection layer, and the provision of the fingerprint detection layer prevents the portion of the touch display layer facing the fingerprint detection layer from being subjected to electromagnetic radiation, thereby solving the problem that the electromagnetic shield layer cannot effectively protect the touch display layer due to the increased size of the fingerprint detection layer.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminal devices, and particularly to terminal devices.

Background Art

[0002] With the development of full-screen technology, under-screen fingerprint technology has become the main trend in the development of fingerprint detection. Under-screen fingerprint technology means that the fingerprint detection layer of a terminal device is provided under the touch display layer. The larger the area of the fingerprint detection layer, the larger the fingerprint detection area of the terminal device, improving the accuracy and security of fingerprint detection and enhancing the user experience. However, since the electromagnetic shielding layer of the touch display layer has poor light transmittance, in order to expand the area of the fingerprint detection layer, it is necessary to reduce the area of the electromagnetic shielding layer and make room for the fingerprint detection layer, which is disadvantageous for protecting the touch display layer with the electromagnetic shielding layer.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The present disclosure provides an improved terminal device.

Means for Solving the Problems

[0004] One aspect of the present disclosure provides a terminal device, which includes a touch display layer having a touch display surface, a fingerprint detection layer provided on a side of the touch display layer facing away from the touch display surface, and a shielding layer provided on a side of the touch display layer facing away from the touch display surface. A part of the shielding layer facing the fingerprint detection layer is located on a side of the fingerprint detection layer facing away from the touch display layer. The shielding layer includes an electromagnetic shielding layer connected to the ground terminal of the terminal device, and at least a part of the electromagnetic shielding layer is located on a side of the fingerprint detection layer facing away from the touch display layer.

[0005] Optionally, at least a part of the electromagnetic shielding layer is bonded to a surface of the fingerprint detection layer facing away from the touch display layer.

[0006] Optionally, the orthographic projection of the fingerprint detection layer onto the electromagnetic shielding layer is entirely located within the electromagnetic shielding layer.

[0007] Optionally, the electromagnetic shielding layer is connected to the ground terminal via a conductive member, and the conductive member is provided at an edge of the electromagnetic shielding layer.

[0008] Optionally, the conductive member includes at least one of a first flexible circuit board, a conductive cloth, and a conductive adhesive.

[0009] Optionally, the terminal device further includes a case, the touch display layer is assembled to the case, the fingerprint detection layer is assembled between the touch display layer and the case, and a surface of the fingerprint detection layer facing away from the touch display layer is bonded to the case via at least a part of the shielding layer.

[0010] Optionally, the case is provided with a concave groove opening towards the touch display layer, and the fingerprint detection layer and at least a part of the shielding layer are located within the concave groove.

[0011] Optionally, the shielding layer further includes a buffer layer bonded between the electromagnetic shielding layer and the case.

[0012] Optionally, the fingerprint detection layer is bonded to a surface of the touch display layer facing away from the touch display surface, and at least a part of the electromagnetic shielding layer is bonded to a surface of the fingerprint detection layer facing away from the touch display layer.

[0013] Optionally, the terminal device further includes a signal reading module, and the signal reading module includes a first reading chip and a second reading chip integrated together. The first reading chip is connected to the fingerprint detection layer to read the electrical signal output by the fingerprint detection layer, and the second reading chip is connected to the touch display layer to read the electrical signal output by the touch display layer.

[0014] Optionally, the signal reading module is connected to the touch display layer and the fingerprint detection layer via a second flexible circuit board.

[0015] Optionally, the area of the orthographic projection of the fingerprint detection layer onto the touch display layer is the same as the area of the touch display layer.

[0016] Optionally, the fingerprint detection layer includes a fingerprint sensing layer and a light adjustment layer provided between the fingerprint sensing layer and the touch display layer. The light adjustment layer includes a microlens array and a second collimating layer provided between the microlens array and the fingerprint sensing layer. The second collimating layer is provided with a second collimating hole for communicating the microlens array and the fingerprint sensing layer.

[0017] By positioning at least a part of the electromagnetic shielding layer on the side facing away from the touch display layer of the fingerprint detection layer, a part of the touch display layer facing the fingerprint detection layer is protected, and by providing the fingerprint detection layer, it is avoided that a part of the touch display layer facing the fingerprint detection layer receives electromagnetic radiation, and the problem that the electromagnetic shielding layer cannot effectively protect the touch display layer due to increasing the size of the fingerprint detection layer is solved.

Brief Description of the Drawings

[0018] To more clearly explain the technical solution in the embodiments of the present invention, the drawings necessary for describing the embodiments are briefly described. The drawings described below are only a part of the embodiments of the present invention, and it is obvious that those skilled in the art can obtain other drawings based on these drawings without creative efforts.

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Embodiments for Carrying Out the Invention

[0030] Hereinafter, based on the drawings of the embodiments of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described. It is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope protected by the present disclosure.

[0031] Here, exemplary embodiments will be described in detail with reference to the drawings. When the following description is related to the drawings, unless otherwise specified, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments that are consistent with the present disclosure. Rather, they are merely examples of devices or methods that are consistent with some aspects of the present disclosure detailed in the appended claims.

[0032] The terms used in this disclosure are for the purpose of describing particular embodiments only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms “a,” “the,” and “said” used in this disclosure and the appended claims also intend the plural forms. Further, as used herein, “and / or” refers to and encompasses any and all possible combinations of one or more of the associated listed items. Unless otherwise explained, similar terms such as “front,” “rear,” “lower,” and / or “upper” are for ease of description only and are not limited to one position or one spatial orientation. Similar terms such as “connect” or “couple” are not limited to physical or mechanical connections and can include direct or indirect electrical connections. Similar terms such as “plurality” or “several” mean two or more.

[0033] With the rapid development of under-screen fingerprint technology, the area of the fingerprint detection region of the terminal device has become increasingly large, improving the user's fingerprint detection experience. In some embodiments, referring to a partial structural cross-sectional view of the terminal device shown in FIG. 1, the terminal device includes a touch display layer 110, a fingerprint detection layer 120, and a shield layer 130. The touch display layer 110 includes a touch display surface 111. The shield layer 130 is provided on the side facing away from the touch display surface 111 of the touch display layer 110. The fingerprint detection layer 120 is provided on the side facing away from the touch display layer 110 of the shield layer 130. And a portion of the shield layer 130 facing the fingerprint detection layer 120 is removed so that light can be irradiated from the touch display layer 110 to the fingerprint detection layer 120, which is useful for the fingerprint detection by the fingerprint detection layer 120. Note that the region of the touch display layer 110 facing the fingerprint detection layer 120 is the fingerprint detection region. The shield layer 130 includes a copper foil 131, and the copper foil 131 is connected to the ground terminal to play a role in preventing electromagnetic radiation and protecting the touch display layer 110. However, to increase the fingerprint detection region, it is necessary to expand the area of the fingerprint detection layer 120. Therefore, more of the shield layer 130 must be removed to make room for the fingerprint detection layer 120, and accordingly, the area of the copper foil 131 also becomes smaller, which is disadvantageous for effectively protecting the touch display layer 110 with the copper foil 131.

[0034] Based on the above drawbacks, embodiments of the present disclosure provide a terminal device, which includes, but is not limited to, a mobile phone, a personal computer, a wearable device, or a medical device, etc. Hereinafter, a mobile phone will be taken as an example for description with reference to the drawings.

[0035] FIG. 2 is a partial structural cross-sectional view of a terminal device shown by an exemplary embodiment of the present disclosure. Referring to FIG. 2, the terminal device includes a touch display layer 210, a fingerprint detection layer 220, and a shield layer 230.

[0036] In an embodiment of the present disclosure, the touch display layer 210 includes a display layer for displaying numbers or images and a touch layer for capturing the position of a touch point pressed by a finger. Exemplarily, the display layer and the touch layer are provided in a stacked manner. Exemplarily, the display layer and the touch layer are integrated into one layer, and the present disclosure is not specifically limited thereto. The touch display layer 210 includes a touch display surface 211 for display and touch. Exemplarily, the touch display layer 210 is a flexible touch display layer 210. Exemplarily, the touch display layer 210 is a rigid touch display layer 210. Exemplarily, the display layer may be an LCD (Liquid Crystal Display) layer or an OLED (Organic Light-Emitting Diode) layer.

[0037] The fingerprint detection layer 220 is provided on the side of the touch display surface 211 of the touch display layer 210 facing away. Note that the fingerprint detection layer 220 is an optical fingerprint detection layer 220 for forming a fingerprint image for fingerprint detection by receiving light transmitted through the touch display layer 210 and converting the optical signal into an electrical signal.

[0038] The shielding layer 230 is provided on the side facing away from the touch display surface 211 of the touch display layer 210. A part of the shielding layer 230 facing the fingerprint detection layer 220 is located on the side facing away from the touch display layer 210 of the fingerprint detection layer 220. The shielding layer 230 includes an electromagnetic shielding layer 231 connected to the ground terminal of the terminal device, and at least a part of the electromagnetic shielding layer 231 is located on the side facing away from the touch display layer 210 of the fingerprint detection layer 220. Note that the shielding layer 230 has poor light transmittance and affects the transmission of light. In order to ensure that light passes through the touch display layer 210 and irradiates the fingerprint detection layer 220, and further facilitate fingerprint detection by the fingerprint detection layer 220, the shielding layer 230 is not provided between the touch display layer 210 and the fingerprint detection layer 220. Exemplarily, a ground terminal is provided on the PCB (Printed Circuit Board) of the terminal device, and by connecting the electromagnetic shielding layer 231 to the ground terminal, the electromagnetic shielding layer 231 plays a role in preventing electromagnetic radiation. Exemplarily, the electromagnetic shielding layer 231 includes a metal layer, and the metal layer may include copper foil, aluminum foil, iron foil, or the like.

[0039] As described above, by positioning at least a part of the electromagnetic shielding layer 231 on the side facing away from the touch display layer 210 of the fingerprint detection layer 220, a part of the touch display layer 210 facing the fingerprint detection layer 220 is protected, and by providing the fingerprint detection layer 220, a part of the touch display layer 210 facing the fingerprint detection layer 220 is avoided from receiving electromagnetic radiation. That is, a part of the electromagnetic shielding layer 231 missing due to the provision of the fingerprint detection layer 220 is supplemented by a part of the electromagnetic shielding layer 231 facing the fingerprint detection layer 220. In this way, a part of the electromagnetic shielding layer 231 facing the fingerprint detection layer 220 and / or a part of the electromagnetic shielding layer 231 not facing the fingerprint detection layer 220 together protect the touch display layer 210, and by increasing the size of the fingerprint detection layer 220, the problem that the electromagnetic shielding layer 231 cannot effectively protect the touch display layer 210 is solved.

[0040] To more clearly understand the terminal device provided by the embodiments of the present disclosure, it will be described in more detail below with reference to the drawings.

[0041] In some embodiments, with continued reference to FIG. 2, at least a part of the electromagnetic shielding layer 231 is bonded to the surface of the touch display layer 210 of the fingerprint detection layer 220 that faces away. In this way, shortening the distance between the electromagnetic shielding layer 231 and the touch display layer 210 helps the electromagnetic shielding layer 231 effectively shield the electromagnetic radiation around the touch display layer 210 and better protect the touch display layer 210.

[0042] Furthermore, in some embodiments, the orthographic projection of the fingerprint detection layer 220 onto the electromagnetic shielding layer 231 is entirely located within the electromagnetic shielding layer 231. Exemplarily, the areas of the two bonding surfaces where both the fingerprint detection layer 220 and the electromagnetic shielding layer 231 are bonded are equal. Exemplarily, the area of the bonding surface of the electromagnetic shielding layer 231 facing the fingerprint detection layer 220 is larger than the area of the bonding surface of the fingerprint detection layer 220 facing the electromagnetic shielding layer 231. In this way, increasing the size of the electromagnetic shielding layer 231 helps the electromagnetic shielding layer 231 more effectively compensate for and shield the electromagnetic radiation around the touch display layer 210.

[0043] In some embodiments, with continued reference to FIG. 2, the electromagnetic shielding layer 231 is connected to the ground terminal via a conductive member 240, and the conductive member 240 is provided at the edge of the electromagnetic shielding layer 231. In this way, shortening the length of the conductive member 240 helps to rationally and fully utilize the edge space inside the terminal device, and also helps to improve the integration degree of the terminal device.

[0044] Furthermore, in some embodiments, the conductive member 240 includes at least one of a first flexible printed circuit board (FPC) 241, a conductive portion, and a conductive adhesive 242. Exemplarily, continuing to refer to FIG. 2, the conductive member 240 includes the first flexible printed circuit board 241 and the conductive adhesive 242. The first flexible printed circuit board 241 is provided at an edge of the fingerprint detection layer 220. The first flexible printed circuit board 241 is connected to the ground terminal of the terminal device. The conductive adhesive 242 is connected to an edge of the electromagnetic shielding layer 231 and the first flexible printed circuit board 241. In some embodiments, the first flexible printed circuit board 241 and the conductive adhesive 242 can be applied to spaces with different structures, rationally planning the internal space of the terminal device, and further helping to connect the electromagnetic shielding layer 231 to the ground terminal. Exemplarily, the terminal device realizes signal transmission between the fingerprint detection layer 220 by means of a flexible printed circuit board, and uses the flexible printed circuit board as the first flexible printed circuit board 241 to be connected to the electromagnetic shielding layer 231, avoiding separately adding and providing the first flexible printed circuit board 241, and further helping to improve the integration degree of the terminal device. FIG. 3 is a partial structural cross-sectional view of a terminal device shown according to an exemplary embodiment of the present disclosure. FIG. 4 is a partial structural cross-sectional view of a terminal device shown according to an exemplary embodiment of the present disclosure. In some embodiments, referring to FIGS. 3 and 4 together, the terminal device further includes a case 250. The touch display layer 210 is assembled to the case 250, and the fingerprint detection layer 220 is assembled between the touch display layer 210 and the case 250. Exemplarily, the case 250 includes a front case, a middle frame, and a back cover. The touch display layer 210 and the fingerprint detection layer 220 can be assembled to the middle frame. After assembling the middle frame, the front case, the back cover, and each module, the assembly of the terminal device is completed. Exemplarily, the touch display surface 211 of the touch display layer 210 is further covered with a glass cover 260 to play a role in protecting the touch display layer 210.

[0045] In some embodiments, referring continuously to FIG. 3, the surface of the fingerprint detection layer 220 facing away from the touch display layer 210 is bonded to the case 250 via at least a part of the shielding layer 230. That is, the fingerprint detection layer 220 is fixed to the case 250 to stably fix the fingerprint detection layer 220.

[0046] Furthermore, in some embodiments, referring continuously to FIG. 3, the case 250 is provided with a concave groove 251 that opens toward the touch display layer 210, and the fingerprint detection layer 220 and at least a part of the shielding layer 230 are located in the concave groove 251. In this way, the concave groove 251 serves to protect the fingerprint detection layer 220, and the internal space of the terminal device is expanded by the concave groove 251, which is helpful for improving the integration degree of the terminal device. Exemplarily, the thickness of the middle frame is greater than 0.3 mm, the concave groove 251 is provided in the middle frame, the thickness of the fingerprint detection layer 220 is less than 0.3 mm, and the fingerprint detection layer 220 is provided in the concave groove 251.

[0047] Furthermore, in some embodiments, referring continuously to FIG. 3, the shielding layer 230 further includes a buffer layer 232, and the buffer layer 232 is bonded between the electromagnetic shielding layer 231 and the case 250. In some embodiments, the inner wall structure of the case 250 may be irregular. By using the buffer layer 232, it plays a role of buffering and sealing, and guarantees the flatness of each film layer. Exemplarily, the buffer layer 232 includes a foam that is lightweight and has excellent deformation effect.

[0048] In other embodiments, referring continuously to FIG. 4, the fingerprint detection layer 220 is bonded to the surface of the touch display layer 210 facing away from the touch display surface 211, and at least a part of the electromagnetic shielding layer 231 is bonded to the surface of the fingerprint detection layer 220 facing away from the touch display layer 210. Exemplarily, the buffer layer 232 is bonded to the side of the electromagnetic shielding layer 231 facing away from the fingerprint detection layer 220.

[0049] In some embodiments, the area of the fingerprint detection layer 220 is smaller than the area of the touch display layer 210, that is, the touch display layer 210 includes a first portion 201 facing the fingerprint detection layer 220 and a second portion 202 not facing the fingerprint detection layer 220. Therefore, referring to FIG. 3, the shield layer 230 facing the second portion 202 of the touch display layer 210 can be directly bonded to the surface of the touch display layer 210 facing away from the touch display surface 211, and the shield layer 230 facing the first portion 201 of the touch display layer 210 can be bonded to the side of the fingerprint detection layer 220 facing away from the touch display layer 210. By cooperating with the electromagnetic shield layer 231 in the shield layer 230 facing the first portion 201 and the second portion 202 of the touch display layer 210 respectively, the role of preventing electromagnetic radiation can be effectively played, and the touch display layer 210 can be effectively protected. Exemplarily, the buffer layer 232 facing the second portion 202 of the touch display layer 210 is located between the electromagnetic shield layer 231 and the touch display layer 210 so as to effectively play a shielding effect. Exemplarily, the buffer layer 232 facing the second portion 202 of the touch display layer 210 may be provided on the side of the electromagnetic shield layer 231 facing away from the touch display layer 210, and the present disclosure is not specifically limited thereto.

[0050] In other embodiments, the area of the orthographic projection of the fingerprint detection layer 220 onto the touch display layer 210 is equal to the area of the touch display layer 210, that is, the fingerprint detection layer 220 completely faces the touch display layer 210 so that the terminal device can detect fingerprints in full screen. Referring to the schematic diagram of the touch display surface 211 of the terminal device shown by an exemplary embodiment of the present disclosure in FIG. 5, the entire touch display surface 211 of the terminal device can be used as a fingerprint detection area, and multiple fingers can simultaneously press the touch display surface 211. The terminal device realizes accurate and secure fingerprint detection by detecting multiple fingerprints 310. For example, by expanding the fingerprint detection area, the terminal device can identify more feature points of the fingerprint and improve the accuracy of fingerprint detection. By expanding the fingerprint detection area, the user can comfortably perform fingerprint detection in any area. By expanding the fingerprint detection area, it helps to realize the multi-fingerprint detection function and improve the accuracy and security of fingerprint recognition for settlement, unlocking, etc.

[0051] FIG. 6 is a partial structural cross-sectional view of the touch display layer 210 and the fingerprint detection layer 220 shown according to an exemplary embodiment of the present disclosure, and FIG. 7 is a partial structural cross-sectional view of the touch display layer 210 and the fingerprint detection layer 220 shown according to an exemplary embodiment of the present disclosure. In some embodiments, referring to FIGS. 6 and 7 together, the fingerprint detection layer 220 includes a fingerprint sensing layer 221 and a light adjustment layer 222 provided between the fingerprint sensing layer 221 and the touch display layer 210, that is, the light adjustment layer 222 is provided on the light receiving side of the fingerprint sensing layer 221. Exemplarily, referring to FIG. 6, the light adjustment layer 222 includes a first collimating layer 223, and a plurality of first collimating holes 224 for communicating the touch display layer 210 and the fingerprint sensing layer 221 are provided in the first collimating layer 223, so that the collimated light is incident on the fingerprint sensing layer 221, and the mutual interference between the light reflected by the raised and valley portions of the fingerprint is avoided. However, in order to guarantee the amount of incident light, the first collimating holes 224 require a large aspect ratio (the ratio of the depth to the aperture diameter of the first collimating holes 224), and the aspect ratio of the first collimating holes 224 may be increased by increasing the thickness of the first collimating layer 223, but this will increase the thickness of the fingerprint detection layer 220, which is disadvantageous to the improvement of the integration degree of the terminal device.

[0052] In other embodiments, still referring to FIG. 7, the light adjustment layer 222 includes a microlens array 225 and a second collimating layer 226 provided between the microlens array 225 and the fingerprint sensing layer 221. The second collimating layer 226 is provided with a second collimating hole 227 that communicates the microlens array 225 and the fingerprint sensing layer 221. In some embodiments, by converging light through the microlens array 225 and making it incident on the second collimating hole 227, it facilitates the collimation of light by the second collimating hole 227 and avoids the mutual interference between the light reflected by the raised and valley portions of the fingerprint. By the microlens array 225 converging light, even when the aspect ratio of the second collimating hole 227 is small, the amount of light incident on the second collimating hole 227 can be guaranteed, which helps to reduce the thickness of the second collimating layer 226 and the thickness of the fingerprint detection layer 220, and can improve the integration degree of the terminal device.

[0053] Exemplarily, the thickness of the first collimating layer 223 is 0.2 mm, and by converging light using the microlens array 225, the thickness of the second collimating layer 226 can be set to 0.05 mm. Exemplarily, by using the light adjustment layer 222 including the microlens array 225, the thickness of the fingerprint detection layer 220 can be reduced to 0.3 mm or less, which helps to improve the integration degree of the terminal device.

[0054] In some embodiments, still referring to FIG. 7, the light adjustment layer 222 includes a microlens array 225, and an air layer 270 is formed between the microlens array 225 and the touch display layer 210. Exemplarily, the thickness of the air layer 270 is 0.2 mm. Based on the difference in the refractive index of light between the air layer 270 and the microlens array 225, it facilitates the convergence of light by the microlens array 225.

[0055] In some embodiments, with continued reference to FIG. 6, the light adjustment layer 222 includes a first collimating layer 223, and the first collimating layer 223 is bonded to the side of the touch display surface 211 of the touch display layer 210 facing away through an OCA (Optically Clear Adhesive) layer 280. In other embodiments, the light adjustment layer 222 includes a microlens array 225 and a second collimating layer 226, and the microlens array 225 is bonded to the side of the touch display surface 211 of the touch display layer 210 facing away through the OCA layer 280. At this time, the air layer 270 between the microlens array 225 and the touch display layer 210 in FIG. 7 is replaced by the OCA layer 280. For the microlens array 225 to converge light, the refractive indices of the OCA layer 280 and the microlens array 225 with respect to light need to be different. Exemplarily, the refractive index of the OCA layer 280 is about 1.2, and the refractive index of the microlens array 225 is about 1.6.

[0056] FIG. 8 is a top view of the fingerprint detection layer 220 shown according to an exemplary embodiment of the present disclosure. FIG. 9 is a top view of the fingerprint detection layer 220 shown according to an exemplary embodiment of the present disclosure. In some embodiments, referring to FIG. 8, the fingerprint detection layer 220 includes a glass substrate 228, the fingerprint sensing layer 221 is formed on the glass substrate 228, and the first reading chip 291 is adhered to the glass substrate 228 to read the electrical signal output by the fingerprint sensing layer 221. In this way, it is avoided that the first reading chip 291 occupies other spaces inside the terminal device. In other embodiments, referring to FIG. 9, the fingerprint detection layer 220 includes a glass substrate 228, the fingerprint sensing layer 221 is formed on the glass substrate 228, the first reading chip 291 is provided on the first flexible circuit board 241, the first flexible circuit board 241 is connected to the fingerprint sensing layer 221, and the first reading chip 291 is used to read the electrical signal output by the fingerprint sensing layer 221. By using the first flexible circuit board 241, it will occupy the edge inside the terminal device, which is helpful for improving the integration degree of the terminal device. Also, since the glass substrate 228 is less expensive than the silicon substrate, the cost can be reduced by using the fingerprint detection layer 220 including the glass substrate 228.

[0057] FIG. 10 is a schematic diagram showing the connection between the fingerprint detection layer 220 and the touch display layer 210 shown by an exemplary embodiment of the present disclosure. In some embodiments, referring to FIG. 10, the terminal device further includes a signal reading module 290, and the signal reading module 290 includes an integrated first reading chip 291 and a second reading chip 292. The first reading chip 291 is connected to the fingerprint detection layer 220 for reading the electrical signal output by the fingerprint detection layer 220, and the second reading chip 292 is connected to the touch display layer 210 for reading the electrical signal output by the touch display layer 210. In this way, by integrating the first reading chip 291 and the second reading chip 292 as the signal reading module 290, it is beneficial to reduce the space occupied by the first reading chip 291 and the second reading chip 292 and improve the integration degree of the terminal device. Compared with purchasing the two reading chips of the first reading chip 291 and the second reading chip 292, it is also helpful for cost reduction.

[0058] In some embodiments, continuing to refer to FIG. 10, the signal reading module 290 is connected to the touch display layer 210 and the fingerprint detection layer 220 via a second flexible circuit board 293. In this way, by using the second flexible circuit board 293, it can be adapted to the irregular space in the terminal device, which is beneficial to improving the integration degree of the terminal device. Exemplarily, the second flexible circuit board 293 and the first flexible circuit board 241 are the same flexible circuit board. Exemplarily, the second flexible circuit board 293 and the first flexible circuit board 241 are different flexible circuit boards.

[0059] FIG. 11 is a schematic diagram showing the connection between the fingerprint detection layer 220 and the touch display layer 210 shown by an exemplary embodiment of the present disclosure. Exemplarily, referring to FIG. 11, the second flexible circuit board 293 includes a first sub-flexible circuit board 294 and a second sub-flexible circuit board 295. The first sub-flexible circuit board 294 is connected to the fingerprint detection layer 220, the second sub-flexible circuit board 295 is connected to the touch display layer 210, the signal reading module 290 is provided on the second sub-flexible circuit board 295, and the first sub-flexible circuit board 294 and the second sub-flexible circuit board 295 are connected via a connector 296. By using the connector 296 for connection, when a failure occurs in either the fingerprint detection layer 220 or the touch display layer 210, the fingerprint detection layer 220 and the touch display layer 210 can be easily separated by the connector 296. Exemplarily, the signal reading module 290 may further be provided on the first sub-flexible circuit board 294, and the present disclosure is not specifically limited thereto.

[0060] As described above, in the terminal device provided by the embodiment of the present disclosure, at least a part of the electromagnetic shielding layer 231 is provided on the side facing away from the touch display layer 210 of the fingerprint detection layer 220, thereby protecting a part of the touch display layer 210 facing the fingerprint detection layer 220, and avoiding the part of the touch display layer 210 from receiving electromagnetic radiation by providing the fingerprint detection layer 220, and solving the problem that the electromagnetic shielding layer 231 cannot effectively protect the touch display layer 210 by increasing the size of the fingerprint detection layer 220. Since the fingerprint detection layer 220 can be bonded to the case 250 or the touch display layer 210, it is advantageous for fixing the fingerprint detection layer 220 and also helps to improve the integration degree of the terminal device. By including the microlens array 225 and the second collimating layer 226 in the fingerprint detection layer 220, it helps to reduce the thickness of the fingerprint detection layer 220 and also helps to improve the integration degree of the terminal device. By integrating the first reading chip 291 and the second reading chip 292 as the signal reading module 290, it helps to reduce the occupied space and also helps to reduce the cost. The structure of the terminal device can be applied to a flexible screen or a rigid screen, has a high integration degree, a low cost, and high market competitiveness.

[0061] The above embodiments of the present disclosure can complement each other as long as they do not conflict with each other.

[0062] In the present disclosure, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of such an actual relationship or order between these entities or operations. Terms such as "comprising", "including" or any variation thereof are intended to cover non-exclusive inclusion, and a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed or further includes elements specific to such a process, method, article or apparatus. Unless further restricted, an element limited to the phrase "comprising one..." does not exclude the further presence of other same elements in the process, method, article or apparatus comprising the said element.

[0063] As described above, the methods and apparatuses provided by the embodiments of the present invention have been described in detail. In this text, specific examples are given to explain the principles and embodiments of the present invention, and the description of the above embodiments only serves to facilitate the understanding of the method of the present invention and its gist. At the same time, it is obvious to those skilled in the art that there are changes in the specific embodiments and application scope based on the gist of the present invention. Therefore, the content of this specification should not be understood as a limitation to the present invention.

[0064] The content disclosed in this application document includes materials protected by copyright. The copyright is owned by the copyright owner. The copyright owner does not object to anyone copying the official records of the National Intellectual Property Administration and the Trademark Office, or the application documents or their disclosed content existing in the records.

Claims

1. A terminal device, comprising: a touch display layer including a touch display surface; a fingerprint detection layer provided on a side of the touch display layer facing away from the touch display surface; a shield layer provided on a side of the touch display layer facing away from the touch display surface, wherein a part of the shield layer facing the fingerprint detection layer is located on a side of the fingerprint detection layer facing away from the touch display layer, and the shield layer includes an electromagnetic shield layer connected to a ground terminal of the terminal device, and at least a part of the electromagnetic shield layer is located on a side of the fingerprint detection layer facing away from the touch display layer; the touch display layer includes a first portion facing the fingerprint detection layer and a second portion not facing the fingerprint detection layer, and the shield layer facing the second portion of the touch display layer is bonded to a surface of the touch display layer facing away from the touch display surface, and the shield layer facing the first portion of the touch display layer is bonded to a side of the fingerprint detection layer facing away from the touch display layer; the terminal device further includes a case, the touch display layer is assembled to the case, the fingerprint detection layer is assembled between the touch display layer and the case, and a surface of the fingerprint detection layer facing away from the touch display layer is bonded to the case through at least a part of the shield layer; the case is provided with a concave groove opening towards the touch display layer, and the fingerprint detection layer and at least a part of the shield layer are located in the concave groove; the shield layer further includes a buffer layer bonded between the electromagnetic shield layer and the case; no shield layer including an electromagnetic shield layer is provided between the touch display layer and the fingerprint detection layer; A terminal device characterized by the above.

2. A positive projection of the fingerprint detection layer onto the electromagnetic shield layer is entirely located within the electromagnetic shield layer. The terminal device according to claim 1, characterized by the above.

3. The electromagnetic shield layer is connected to the ground terminal through a conductive member, and the conductive member is provided at an edge of the electromagnetic shield layer. The terminal device according to claim 1, characterized by the above.

4. The conductive member includes at least one of a first flexible circuit board, a conductive cloth, and a conductive adhesive. The terminal device according to claim 3, characterized by the above.

5. The terminal device further includes a signal reading module, and the signal reading module includes a first reading chip and a second reading chip integrated together. The first reading chip is connected to the fingerprint detection layer so as to read the electrical signal output by the fingerprint detection layer, and the second reading chip is connected to the touch display layer so as to read the electrical signal output by the touch display layer. The terminal device according to claim 1, characterized in that.

6. The signal reading module is connected to the touch display layer and the fingerprint detection layer via a second flexible circuit board. The terminal device according to claim 5, characterized in that.

7. The fingerprint detection layer includes a fingerprint sensing layer and a light adjustment layer provided between the fingerprint sensing layer and the touch display layer. The light adjustment layer includes a microlens array and a second collimating layer provided between the microlens array and the fingerprint sensing layer. The second collimating layer is provided with a second collimating hole for communicating the microlens array and the fingerprint sensing layer. The terminal device according to claim 1, characterized in that.

8. The shielding layer further includes a buffer layer. The buffer layer of the shielding layer facing the second part of the touch display layer is provided on the side of the electromagnetic shielding layer of the shielding layer facing the touch display layer, and the buffer layer of the shielding layer facing the first part of the touch display layer is provided on the side of the electromagnetic shielding layer of the shielding layer facing away from the touch display layer. The terminal device according to claim 1, characterized in that.

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