Terminal equipment

Abstract

The present disclosure provides a terminal device. The terminal device includes: a touch display layer, a fingerprint detection layer and a shielding layer. The touch display layer includes a touch display surface. The fingerprint detection layer is arranged on the side of the touch display layer facing away from the touch display surface. The shielding layer is arranged on the side of the touch display layer facing away from the touch display surface, and the part of the shielding layer opposite to the fingerprint detection layer is located on the 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 part of the electromagnetic shielding layer is located on the side of the fingerprint detection layer facing away from the touch display layer. The electromagnetic shielding layer in the terminal device can effectively protect the part of the touch display layer opposite to the fingerprint detection layer, and avoid the part of the touch display layer opposite to the fingerprint detection layer from being subjected to electromagnetic radiation due to the provision of the fingerprint detection layer, thereby solving the problem that the electromagnetic shielding layer cannot effectively protect the touch display layer due to the large size of the fingerprint detection layer.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminal equipment, and in particular to a terminal equipment. Background Art

[0002] With the development of full-screen technology, under-screen fingerprint technology has become the main development trend of fingerprint detection. Among them, under-screen fingerprint technology refers to: the fingerprint detection layer of the terminal device is set below the touch display layer. The larger the area of ​​the fingerprint detection layer, the larger the fingerprint detection area of ​​the terminal device, which will increase the accuracy and security of fingerprint detection and improve the user experience. However, due to the poor light transmittance of the electromagnetic shielding layer of the touch display layer, if the area of ​​the fingerprint detection layer is increased, the area of ​​the electromagnetic shielding layer needs to be reduced to make way for the fingerprint detection layer, which is not conducive to the electromagnetic shielding layer protecting the touch display layer. Summary of the invention

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

[0004] One aspect of the present disclosure provides a terminal device, which includes: a touch display layer, including a touch display surface; a fingerprint detection layer, which is arranged on a side of the touch display layer facing away from the touch display surface; and a shielding layer, which is arranged on a side of the touch display layer facing away from the touch display surface, and a portion of the shielding layer opposite to 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 a ground terminal of the terminal device, and at least a portion 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 portion of the electromagnetic shielding layer is attached to a surface of the fingerprint detection layer that is opposite to the touch display layer.

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

[0007] Optionally, the electromagnetic shielding layer is connected to the ground end via a conductive member, and the conductive member is arranged 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 also includes a casing, the touch display layer is assembled in the casing, the fingerprint detection layer is assembled between the touch display layer and the casing, and a side of the fingerprint detection layer facing away from the touch display layer is adhered to the casing through at least a portion of the shielding layer.

[0010] Optionally, the housing is provided with a groove with an opening facing the touch display layer, and the fingerprint detection layer and at least a portion of the shielding layer are located in the groove.

[0011] Optionally, the shielding layer further includes a buffer layer, and the buffer layer is attached between the electromagnetic shielding layer and the housing.

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

[0013] Optionally, the terminal device also includes a signal reading module, which includes a first reading chip and a second reading chip integrated into one, the first reading chip is connected to the fingerprint detection layer, and is used to read the electrical signal output by the fingerprint detection layer; the second reading chip is connected to the touch display layer, and is used 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 through a second flexible circuit board.

[0015] Optionally, an orthographic projection area of ​​the fingerprint detection layer on the touch display layer is equal to an area of ​​the touch display layer.

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

[0017] At least a portion of the electromagnetic shielding layer is located on the side of the fingerprint detection layer facing away from the touch display layer to protect the portion of the touch display layer opposite to the fingerprint detection layer, thereby preventing the portion of the touch display layer opposite to the fingerprint detection layer from being exposed to electromagnetic radiation due to the provision of the fingerprint detection layer, thereby solving the problem that the electromagnetic shielding layer cannot effectively protect the touch display layer due to the enlarged size of the fingerprint detection layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0019] Figure 1Shown is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment.

[0020] Figure 2 Shown is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure.

[0021] Figure 3 Shown is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure.

[0022] Figure 4 Shown is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure.

[0023] Figure 5 Shown is a schematic diagram of a touch display surface of a terminal device according to an exemplary embodiment of the present disclosure.

[0024] Figure 6 Shown is a partial structural cross-sectional view of a touch display layer and a fingerprint detection layer according to an exemplary embodiment of the present disclosure.

[0025] Figure 7 Shown is a partial structural cross-sectional view of a touch display layer and a fingerprint detection layer according to an exemplary embodiment of the present disclosure.

[0026] Figure 8 FIG. 1 is a top view of a fingerprint detection layer according to an exemplary embodiment of the present disclosure.

[0027] Fig. 9 FIG. 1 is a top view of a fingerprint detection layer according to an exemplary embodiment of the present disclosure.

[0028] Fig.10 FIG. 4 is a schematic diagram showing the connection between the fingerprint detection layer and the touch display layer according to an exemplary embodiment of the present disclosure.

[0029] Fig.11 FIG. 4 is a schematic diagram showing the connection between the fingerprint detection layer and the touch display layer according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices or methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms of "a", "said" and "the" used in the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items. Unless otherwise indicated, similar words such as "front", "rear", "lower" and / or "upper" are only for ease of explanation and are not limited to one position or one spatial orientation. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. Similar words such as "multiple" or "several" mean two or more.

[0033] With the rapid development of under-screen fingerprint technology, the fingerprint detection area of ​​terminal devices is getting larger and larger, which improves the user's fingerprint detection experience. Figure 1 The partial structural cross-sectional view of the terminal device shown in the figure, the terminal device includes: a touch display layer 110, a fingerprint detection layer 120 and a shielding layer 130. Among them, the touch display layer 110 includes a touch display surface 111, the shielding layer 130 is arranged on the side of the touch display layer 110 facing away from the touch display surface 111, and the fingerprint detection layer 120 is arranged on the side of the shielding layer 130 facing away from the touch display layer 110, and the portion of the shielding layer 130 opposite to 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, so as to facilitate the fingerprint detection layer 120 to detect fingerprints. It can be understood that the area opposite to the touch display layer 110 and the fingerprint detection layer 120 is the fingerprint detection area. The shielding layer 130 includes a copper foil 131, which is connected to the ground terminal to play a role in preventing electromagnetic radiation to protect the touch display layer 110. However, if the fingerprint detection area is enlarged, the area of ​​the fingerprint detection layer 120 needs to be enlarged, and more shielding layers 130 need to be removed to make room for the fingerprint detection layer 120 . Correspondingly, the area of ​​the copper foil 131 is reduced, which is not conducive to the copper foil 131 effectively protecting the touch display layer 110 .

[0034] Based on the above defects, the 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. The following takes a mobile phone as an example and describes it in combination with the accompanying drawings:

[0035] Figure 2 FIG. 1 is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure. Figure 2 The terminal device includes a touch display layer 210 , a fingerprint detection layer 220 and a shielding layer 230 .

[0036] In an embodiment of the present disclosure, the touch display layer 210 includes a display layer and a touch layer, the display layer is used to display numbers or images, and the touch layer is used to capture the position of the touch point pressed by the finger. Exemplarily, the display layer and the touch layer are stacked. Exemplarily, the display layer and the touch layer are integrated into one layer, which is not specifically limited in the present disclosure. 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 can be an LCD (Liquid Crystal Display) layer or an OLED (Organic Light-Emitting Diode) layer.

[0037] The fingerprint detection layer 220 is disposed on the side of the touch display layer 210 facing away from the touch display surface 211. It should be noted that the fingerprint detection layer 220 is an optical fingerprint detection layer 220, which is used to receive light passing through the touch display layer 210 and convert the optical signal into an electrical signal, based on which a fingerprint image is formed for detecting fingerprints.

[0038] The shielding layer 230 is arranged on the side of the touch display layer 210 facing away from the touch display surface 211, and the part of the shielding layer 230 opposite to the fingerprint detection layer 220 is located on the side of the fingerprint detection layer 220 facing away from the touch display layer 210. The shielding layer 230 includes an electromagnetic shielding layer 231 connected to the ground terminal of the terminal device, and at least part of the electromagnetic shielding layer 231 is located on the side of the fingerprint detection layer 220 facing away from the touch display layer 210. It can be understood that the light transmittance of the shielding layer 230 is poor, which affects the penetration of light. The shielding layer 230 is not arranged between the touch display layer 210 and the fingerprint detection layer 220 to ensure that light can pass through the touch display layer 210 to irradiate the fingerprint detection layer 220, thereby facilitating the fingerprint detection layer 220 to detect fingerprints. Exemplarily, the PCB (Printed Circuit Board) of the terminal device is provided with a ground terminal, and the electromagnetic shielding layer 231 is connected to the ground terminal so that the electromagnetic shielding layer 231 plays an effect of 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] Based on the above, at least part of the electromagnetic shielding layer 231 is located on the side of the fingerprint detection layer 220 facing away from the touch display layer 210 to protect the part of the touch display layer 210 opposite to the fingerprint detection layer 220, so as to avoid the part of the touch display layer 210 opposite to the fingerprint detection layer 220 being subjected to electromagnetic radiation due to the setting of the fingerprint detection layer 220. That is, the part of the electromagnetic shielding layer 231 opposite to the fingerprint detection layer 220 compensates for the part of the electromagnetic shielding layer 231 missing due to the setting of the fingerprint detection layer 220. In this way, the part of the electromagnetic shielding layer 231 opposite to the fingerprint detection layer 220 and / or the part of the electromagnetic shielding layer 231 not opposite to the fingerprint detection layer 220 cooperates to protect the touch display layer 210, thereby solving the problem that the electromagnetic shielding layer 231 cannot effectively protect the touch display layer 210 due to the enlargement of the size of the fingerprint detection layer 220.

[0040] In order to more clearly understand the terminal device provided by the embodiment of the present disclosure, the following is described in more detail with reference to the accompanying drawings:

[0041] In some embodiments, please refer to Figure 2 At least part of the electromagnetic shielding layer 231 is attached to the side of the fingerprint detection layer 220 facing away from the touch display layer 210. In this way, the distance between the electromagnetic shielding layer 231 and the touch display layer 210 is reduced, which is more conducive to the electromagnetic shielding layer 231 effectively shielding the electromagnetic radiation around the touch display layer 210, thereby effectively protecting the touch display layer 210.

[0042] Further, in some embodiments, the orthographic projection of the fingerprint detection layer 220 on the electromagnetic shielding layer 231 is entirely located on the electromagnetic shielding layer 231. Exemplarily, the areas of the two bonding surfaces of the fingerprint detection layer 220 and the electromagnetic shielding layer 231 are equal. Exemplarily, the area of ​​the bonding surface of the electromagnetic shielding layer 231 facing the fingerprint detection layer 220 is greater than the area of ​​the bonding surface of the fingerprint detection layer 220 facing the electromagnetic shielding layer 231. In this way, enlarging the size of the electromagnetic shielding layer 231 is conducive to the electromagnetic shielding layer 231 to more effectively compensate and shield the electromagnetic radiation around the touch display layer 210.

[0043] In some embodiments, please refer to Figure 2 The electromagnetic shielding layer 231 is connected to the ground terminal through the conductive member 240, and the conductive member 240 is arranged at the edge of the electromagnetic shielding layer 231. In this way, the length of the conductive member 240 is reduced, so as to reasonably and fully utilize the edge space inside the terminal device, which is conducive to improving the integration of the terminal device.

[0044] Further, 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. For example, please continue to refer to Figure 2 , the conductive member 240 includes a first flexible circuit board 241 and a conductive adhesive 242, the first flexible circuit board 241 is arranged at the edge of the fingerprint detection layer 220, the first flexible circuit board 241 is connected to the ground terminal of the terminal device, and the conductive adhesive 242 is connected to the edge of the electromagnetic shielding layer 231 and the first flexible circuit board 241. In some embodiments, the first flexible circuit board 241 and the conductive adhesive 242 can be applied to spaces of different structures, which is conducive to the reasonable planning of the internal space of the terminal device, and the electromagnetic shielding layer 231 is connected to the ground terminal. Exemplarily, the terminal device realizes signal transmission with the fingerprint detection layer 220 through the flexible circuit board, and uses the flexible circuit board as the first flexible circuit board 241 to connect with the electromagnetic shielding layer 231, avoiding the need to separately add the first flexible circuit board 241, which is more conducive to improving the integration of the terminal device.

[0045] Figure 3 Shown is a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure.

[0046] Figure 4 The figure shows a partial structural cross-sectional view of a terminal device according to an exemplary embodiment of the present disclosure. Figure 3 and Figure 4The terminal device also includes a housing 250, the touch display layer 210 is assembled in the housing 250, and the fingerprint detection layer 220 is assembled between the touch display layer 210 and the housing 250. Exemplarily, the housing 250 includes a front housing, a middle frame and a back cover, the touch display layer 210 and the fingerprint detection layer 220 can be assembled in the middle frame, and after the middle frame, the front housing, the back cover and each module are assembled, the terminal device is assembled. Exemplarily, the touch display surface 211 of the touch display layer 210 is also covered with a glass cover plate 260 to protect the touch display layer 210.

[0047] In some embodiments, please refer to Figure 3 The side of the fingerprint detection layer 220 facing away from the touch display layer 210 is attached to the housing 250 through at least a portion of the shielding layer 230 , that is, the fingerprint detection layer 220 is fixed to the housing 250 , so as to stably fix the fingerprint detection layer 220 .

[0048] Further, in some embodiments, continue to refer to Figure 3 , the housing 250 is provided with a groove 251 with an opening toward the touch display layer 210, and the fingerprint detection layer 220 and at least part of the shielding layer 230 are located in the groove 251. In this way, the groove 251 protects the fingerprint detection layer 220, and the internal space of the terminal device is increased by the groove 251, which is conducive to improving the integration of the terminal device. Exemplarily, the thickness of the middle frame is greater than 0.3 mm, the middle frame is provided with the groove 251, the thickness of the fingerprint detection layer 220 is less than 0.3 mm, and the fingerprint detection layer 220 is arranged in the groove 251.

[0049] Further, in some embodiments, continue to refer to Figure 3 , the shielding layer 230 further includes a buffer layer 232, and the buffer layer 232 is attached between the electromagnetic shielding layer 231 and the housing 250. In some embodiments, the inner wall structure of the housing 250 may be irregular, and the buffer layer 232 is used to play a buffering and sealing role, and ensure the flatness of each film layer. Exemplarily, the buffer layer 232 includes foam, which is light in weight and has a good deformability effect.

[0050] In other embodiments, please continue to refer to Figure 4 The fingerprint detection layer 220 is attached to the side of the touch display layer 210 that faces away from the touch display surface 211, and at least a portion of the electromagnetic shielding layer 231 is attached to the side of the fingerprint detection layer 220 that faces away from the touch display layer 210. Exemplarily, the buffer layer 232 is attached to the side of the electromagnetic shielding layer 231 that faces away from the fingerprint detection layer 220.

[0051] 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 opposite to the fingerprint detection layer 220 and a second portion 202 not opposite to the fingerprint detection layer 220. Figure 3 , the shielding layer 230 opposite to the second part 202 of the touch display layer 210 can be directly attached to the side of the touch display layer 210 that is opposite to the touch display surface 211, and the shielding layer 230 opposite to the first part 201 of the touch display layer 210 can be attached to the side of the fingerprint detection layer 220 that is opposite to the touch display layer 210. By cooperating with the electromagnetic shielding layer 231 in the shielding layer 230 that is respectively opposite to the first part 201 and the second part 202 of the touch display layer 210, it can effectively play a role in preventing electromagnetic radiation, so as to effectively protect the touch display layer 210. Exemplarily, the buffer layer 232 opposite to the second part 202 of the touch display layer 210 is located between the electromagnetic shielding layer 231 and the touch display layer 210, so as to effectively play a shielding effect. For example, the buffer layer 232 opposite to the second portion 202 of the touch display layer 210 may also be disposed on a side of the electromagnetic shielding layer 231 facing away from the touch display layer 210 , which is not specifically limited in the present disclosure.

[0052] In other embodiments, the orthographic projection area of ​​the fingerprint detection layer 220 on the touch display layer 210 is equal to the area of ​​the touch display layer 210, that is, the fingerprint detection layer 220 is completely opposite to the touch display layer 210, so that the entire screen of the terminal device can detect fingerprints. Figure 5 The present disclosure shown is a schematic diagram of a touch display surface 211 of a terminal device according to an exemplary embodiment. The entire touch display surface 211 of the terminal device can be used as a fingerprint detection area. Multiple fingers can press the touch display surface 211 at the same time. The terminal device detects multiple fingerprints 310 to achieve accurate and secure fingerprint detection. For example, by increasing the fingerprint detection area, the terminal device can identify more feature points of the fingerprint, thereby improving the accuracy of fingerprint detection. By increasing the fingerprint detection area, the user can comfortably perform fingerprint detection in any area. By increasing the fingerprint detection area, it is beneficial to realize the multi-fingerprint detection function, and improve the accuracy and security of fingerprint recognition such as payment and unlocking.

[0053] Figure 6 FIG. 2 is a partial structural cross-sectional view of a touch display layer 210 and a fingerprint detection layer 220 according to an exemplary embodiment of the present disclosure. Figure 7 FIG. 2 is a partial structural cross-sectional view of a touch display layer 210 and a fingerprint detection layer 220 according to an exemplary embodiment of the present disclosure. Figure 6 and Figure 7The fingerprint detection layer 220 includes: a fingerprint sensing layer 221, and a light adjustment layer 222 disposed between the fingerprint sensing layer 221 and the touch display layer 210, that is, the light adjustment layer 222 is disposed on the light receiving side of the fingerprint sensing layer 221. Figure 6 The light adjustment layer 222 includes a first collimating layer 223, and the first collimating layer 223 is provided with a plurality of first collimating holes 224 connecting the touch display layer 210 and the fingerprint sensing layer 221, so that the collimated light is incident on the fingerprint sensing layer 221, and the light reflected by the ridges and valleys of the fingerprint of the finger is prevented from interfering with each other. However, the first collimating hole 224 needs to have a larger aspect ratio (the ratio of the depth of the first collimating hole 224 to the aperture) to ensure the amount of light entering. The first collimating layer 223 can be made thick to increase the aspect ratio of the first collimating hole 224, which increases the thickness of the fingerprint detection layer 220, which is not conducive to improving the integration of the terminal device.

[0054] In some other embodiments, continue to refer to Figure 7 The light adjustment layer 222 includes a microlens array 225 and a second collimating layer 226 disposed between the microlens array 225 and the fingerprint sensing layer 221. The second collimating layer 226 is provided with a second collimating hole 227 connecting the microlens array 225 and the fingerprint sensing layer 221. In some embodiments, the light is focused by the microlens array 225 and then incident into the second collimating hole 227, so that the second collimating hole 227 collimates the light and avoids mutual interference between the light reflected by the ridges and valleys of the fingerprint of the finger. Since the microlens array 225 focuses the light, the amount of light entering the second collimating hole 227 can also be guaranteed when the depth-width ratio of the second collimating hole 227 is relatively small. Therefore, the thickness of the second collimating layer 226 can be made thinner, which is conducive to reducing the thickness of the fingerprint detection layer 220 to improve the integration of the terminal device.

[0055] Exemplarily, the thickness of the first collimating layer 223 is 0.2 mm, and the thickness of the second collimating layer 226 can be reduced to 0.05 mm by focusing light using the microlens array 225. 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 less than 0.3 mm, which is beneficial to improving the integration of the terminal device.

[0056] In some embodiments, continue to refer to Figure 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 different refractive indices of the air layer 270 and the microlens array 225 for light, it is beneficial for the microlens array 225 to focus the light.

[0057] In some embodiments, continue to refer to Figure 6 , the light adjustment layer 222 includes a first collimating layer 223, and the first collimating layer 223 is attached to the side of the touch display layer 210 facing away from the touch display surface 211 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 attached to the side of the touch display layer 210 facing away from the touch display surface 211 through an OCA layer 280. Figure 7 The air layer 270 between the microlens array 225 and the touch display layer 210 is replaced by an OCA layer 280. In order to make the microlens array 225 focus light, it is necessary to make the refractive index of the OCA layer 280 and the microlens array 225 different for light. 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.

[0058] Figure 8 FIG. 2 is a top view of a fingerprint detection layer 220 according to an exemplary embodiment of the present disclosure. Fig. 9 FIG. 2 is a top view of a fingerprint detection layer 220 according to an exemplary embodiment of the present disclosure. Figure 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 bonded to the glass substrate 228 for reading the electrical signal output by the fingerprint sensing layer 221. In this way, the first reading chip 291 can be prevented from occupying other space in the terminal device. In other embodiments, refer to Fig. 9 The fingerprint detection layer 220 includes a glass substrate 228, a fingerprint sensing layer 221 is formed on the glass substrate 228, a first reading chip 291 is disposed 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, the space at the inner edge of the terminal device can be occupied, which is conducive to improving the integration of the terminal device. In addition, since the glass substrate 228 is cheaper than the silicon substrate, the use of the fingerprint detection layer 220 including the glass substrate 228 can reduce costs.

[0059] Fig.10 FIG. 2 is a schematic diagram showing the connection between the fingerprint detection layer 220 and the touch display layer 210 according to an exemplary embodiment of the present disclosure. Fig.10The terminal device also includes a signal reading module 290, which includes a first reading chip 291 and a second reading chip 292 integrated into one body. The first reading chip 291 is connected to the fingerprint detection layer 220 and is used to read the electrical signal output by the fingerprint detection layer 220; the second reading chip 292 is connected to the touch display layer 210 and is used to read the electrical signal output by the touch display layer 210. In this way, the first reading chip 291 and the second reading chip 292 are integrated into the signal reading module 290, which is conducive to reducing the occupied space of the first reading chip 291 and the second reading chip 292, and improving the integration of the terminal device. Compared with purchasing two reading chips, the first reading chip 291 and the second reading chip 292, it is also conducive to reducing costs.

[0060] In some embodiments, continue to refer to Fig.10 , the signal reading module 290 is connected to the touch display layer 210 and the fingerprint detection layer 220 through the second flexible circuit board 293. In this way, the use of the second flexible circuit board 293 can be applied to the irregular space in the terminal device, which is conducive to improving the integration 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.

[0061] Fig.11 FIG. 2 is a schematic diagram showing the connection between the fingerprint detection layer 220 and the touch display layer 210 according to an exemplary embodiment of the present disclosure. 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 through a connector 296. By connecting using the connector 296, when either the fingerprint detection layer 220 or the touch display layer 210 fails, the fingerprint detection layer 220 and the touch display layer 210 can be easily separated through the connector 296. Exemplarily, the signal reading module 290 can also be provided on the first sub-flexible circuit board 294, which is not specifically limited in the present disclosure.

[0062] In summary, the terminal device provided by the embodiment of the present disclosure protects the part of the touch display layer 210 opposite to the fingerprint detection layer 220 by making at least part of the electromagnetic shielding layer 231 disposed on the side of the fingerprint detection layer 220 facing away from the touch display layer 210, thereby preventing the part of the touch display layer 210 from being subjected to electromagnetic radiation due to the provision of the fingerprint detection layer 220, thereby solving the problem that the electromagnetic shielding layer 231 cannot effectively protect the touch display layer 210 due to the enlarged size of the fingerprint detection layer 220. The fingerprint detection layer 220 can be attached to the housing 250 or the touch display layer 210, which is not only conducive to stabilizing the fingerprint detection layer 220, but also conducive to improving the integration of the terminal device. By making the fingerprint detection layer 220 include a microlens array 225 and a second collimating layer 226, it is conducive to reducing the thickness of the fingerprint detection layer 220, thereby improving the integration of the terminal device. By integrating the first reading chip 291 and the second reading chip 292 into a signal reading module 290, it is not only conducive to reducing the occupied space, but also conducive to reducing costs. The structure of the terminal device is applicable to flexible screens and rigid screens, and has high integration, low cost and good market competitiveness.

[0063] The above-mentioned various embodiments of the present disclosure may complement each other if no conflict occurs.

[0064] It should be noted that, in this article, 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 any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] The method and device provided in the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

[0066] The disclosure of this patent document contains material that is subject to copyright protection. The copyright is reserved by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it exists in the official records and files of the Patent and Trademark Office.

Claims

1. A terminal device, characterized in that: The terminal device comprises: A touch display layer, including a touch display surface; A fingerprint detection layer is provided on a side of the touch display layer facing away from the touch display surface; the area of ​​the fingerprint detection layer facing the touch display surface is a fingerprint detection area; and A shielding layer is arranged on a side of the touch display layer facing away from the touch display surface, and a portion of the shielding layer opposite to 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 a ground terminal of the terminal device, and at least a portion of the electromagnetic shielding layer is located on a side of the fingerprint detection layer facing away from the touch display layer.

2. The terminal device according to claim 1, characterized in that: At least a portion of the electromagnetic shielding layer is attached to a surface of the fingerprint detection layer facing away from the touch display layer.

3. The terminal device according to claim 2, characterized in that: The orthographic projection of the fingerprint detection layer on the electromagnetic shielding layer is entirely located on the electromagnetic shielding layer.

4. The terminal device according to claim 1, characterized in that: The electromagnetic shielding layer is connected to the grounding end through a conductive member, and the conductive member is arranged at the edge of the electromagnetic shielding layer.

5. The terminal device according to claim 4, characterized in that: The conductive member includes at least one of a first flexible circuit board, a conductive cloth and a conductive adhesive.

6. The terminal device according to claim 1, characterized in that: The terminal device also includes a casing, the touch display layer is assembled in the casing, the fingerprint detection layer is assembled between the touch display layer and the casing, and a side of the fingerprint detection layer facing away from the touch display layer is adhered to the casing through at least a portion of the shielding layer.

7. The terminal device according to claim 6, characterized in that: The housing is provided with a groove with an opening facing the touch display layer, and the fingerprint detection layer and at least a part of the shielding layer are located in the groove.

8. The terminal device according to claim 6, characterized in that: The shielding layer further includes a buffer layer, and the buffer layer is attached between the electromagnetic shielding layer and the housing.

9. The terminal device according to claim 1, characterized in that: The fingerprint detection layer is attached to a side of the touch display layer that is opposite to the touch display surface, and at least a portion of the electromagnetic shielding layer is attached to a side of the fingerprint detection layer that is opposite to the touch display layer.

10. The terminal device according to claim 1, characterized in that: The terminal device further includes a signal reading module, the signal reading module includes a first reading chip and a second reading chip integrated into one body, the first reading chip is connected to the fingerprint detection layer, and is used to read the electrical signal output by the fingerprint detection layer; The second reading chip is connected to the touch display layer and is used for reading the electrical signal output by the touch display layer.

11. The terminal device according to claim 10, characterized in that: The signal reading module is connected to the touch display layer and the fingerprint detection layer through a second flexible circuit board.

12. The terminal device according to claim 1, characterized in that: The orthographic projection area of ​​the fingerprint detection layer on the touch display layer is equal to the area of ​​the touch display layer.

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

Images