TWM602669U - Electronic device - Google Patents

Abstract

An electronic device including a fingerprint sensing module, a display panel, a connection layer, and a plurality of supporting elements is provided. The fingerprint sensing module receives a sensing light beam. The fingerprint sensing module includes a collimating layer. The display panel is disposed on the fingerprint sensing module, and provides an illumination light beam to a finger to reflect the sensing light beam. The connection layer is connected between the fingerprint sensing module and the display panel. The connection layer is ring-shaped. The plurality of supporting elements are disposed on the fingerprint sensing module. The support element is non-transparent. The collimating layer includes a plurality of through holes, and the plurality of supporting elements do not overlap the plurality of through holes in the vertical direction.

Description

Electronic device

The present invention relates to an electronic device, and especially to an electronic device with fingerprint recognition function.

In current devices, optical adhesives (such as solid transparent optical adhesives (Optically Clear Adhesive, OCA) or ultraviolet hardening resins (Optically Clear Resin, OCR)) are often used to combine the light-emitting display and the under-screen optics in a fully bonded manner. Fingerprint recognition module. However, the yield rate of the device adopting the full bonding method is low, which will cause consumption and scrapping of the light-emitting display screen in the bonding process, and will inevitably cause an increase in cost. Therefore, controlling the bonding yield is more important than the material cost.

In addition, under strong light or direct sunlight, light reflected between the light-emitting display and the under-screen optical fingerprint recognition module will affect the image quality of the fingerprint. In order to avoid the consumption and scrapping of the light-emitting display during the lamination process, an improved solution for the bonding of a large-area full-screen fingerprint recognition module and a light-emitting display is improved, and it can also solve the problem of lighting under strong light or direct sunlight. The problem of reflected light will occur between the display screen and the under-screen optical fingerprint recognition module, which needs to be devoted to this field.

The present invention provides an electronic device, which can avoid generating Newton rings when fingerprint sensing is pressed, and can make the structure not easily deformed.

The present invention provides an electronic device, which includes a fingerprint sensing module, a display panel, a connection layer and a plurality of supporting elements. The fingerprint sensing module receives the sensing beam. The fingerprint sensing module includes a photosensitive element and an optical collimation layer. The display panel is configured in the fingerprint sensing module, and provides an illumination beam to the finger to reflect the sensing beam. The connection layer is connected between the fingerprint sensing module and the display panel, and the connection layer is ring-shaped. The supporting element is arranged between the fingerprint sensing module and the display panel. The height of at least one part of the supporting element is different from the height of at least another part of the supporting element. Wherein, the optical collimation layer includes a plurality of light-shielding parts spaced apart from each other, and a plurality of supporting elements overlap the light-shielding parts in a vertical direction.

Based on the above, in the electronic device created by the present invention, the display panel and the fingerprint sensing module are connected in a frame-attached manner through the connecting layer, and the display panel and the fingerprint sensing module are configured with a plurality of supporting elements to support The display panel is separated from the fingerprint sensor module. Therefore, the distance between the display panel and the fingerprint sensing module can be maintained to avoid the occurrence of Newton's ring phenomenon when the finger presses on the display panel to deform and contact the fingerprint sensing module. It can also prevent the fingerprint sensor module from damaging the display panel due to close contact or violent impact, thereby improving the overall structural strength. In addition, the height of at least one part of the supporting element is different from the height of at least another part of the supporting element, and these supporting elements overlap the light shielding parts in the optical collimating layer in the vertical direction. In this way, it can be avoided that the support element cannot be restored from permanent deformation after being pressed by a finger, and may even cause damage to the support element, thereby maintaining good elastic deformation of the support element, so that the overall structure can be quickly restored to its original shape.

In order to make the above-mentioned features and advantages of the new creation more obvious and understandable, the following embodiments are specially cited, and the accompanying drawings are described in detail as follows.

Please refer to Figure 1. The present embodiment provides an electronic device 100 including a fingerprint sensing module 110, a display panel 120, a connection layer 130, and a plurality of supporting elements 140. The electronic device 100 has a fingerprint recognition function, which is suitable for the user to perform fingerprint sensing when pressing the display panel 120 with the finger 10. Specifically, the display panel 120 transmits the illumination light beam L1 to the user's finger 10 to reflect and generate the sensing light beam L2. The electronic device 100 receives the sensing light beam L2 for fingerprint sensing. For example, the electronic device 100 is, for example, a smart phone, a tablet computer, a notebook computer or a touch-sensitive display device, etc. The invention of the present invention is not limited thereto.

The fingerprint sensing module 110 receives the sensing beam L2. In detail, the fingerprint sensing module 110 includes a photosensitive element 112 and an optical collimation layer 114. The photosensitive element 112 is, for example, an image sensor chip such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD). The optical collimating layer 114 includes a plurality of light-transmitting holes H for collimating the sensing beam L2 passing through the optical collimating layer 114.

In some embodiments, the fingerprint sensing module 110 may further include a filter layer (not shown) and/or an anti-reflection layer (not shown), which are disposed between the photosensitive element 112 and the optical collimation layer 114. The filter layer is, for example, an infrared light cutoff filter, which is used to absorb infrared light to improve the sensing optical effect. However, in other embodiments, the filter layer may also be a filter for filtering other visible light wavebands or invisible light wavebands. The anti-reflective layer is, for example, an anti-reflective coating to reduce reflection, thereby improving the photosensitive effect of the fingerprint sensor module 110. In addition, in the case of direct ambient light beams such as strong light or sunlight, the reflected light generated between the display panel 120 and the fingerprint sensing module 110 can be prevented from affecting the fingerprint image. Therefore, the sensing quality of the fingerprint sensing module 110 can be improved.

In detail, in the present embodiment, the optical collimation layer 114 includes a plurality of light shielding portions N with a distance from each other and a plurality of microlenses M with a distance from each other. The light-shielding portion N is formed of a light-absorbing material, and is used to absorb stray light in the visible light waveband or the invisible light waveband. The microlens M is used to focus the passing sensing beam L2 to the photosensitive element 112. In the horizontal direction D1 in this embodiment, the positions of the plurality of light shielding parts N and the positions of the plurality of microlenses M are arranged alternately. In other words, the light shielding portion N is located between two adjacent microlenses M in the horizontal direction D1, as shown in FIG. 1.

The display panel 120 is disposed in the fingerprint sensing module 110 and is suitable for providing the illumination beam L1 to the user's finger 10 to reflect the sensing beam L2. The display panel 120 is, for example, an organic light-emitting diode (OLED) display panel. However, in other embodiments, the display panel 120 can also be a liquid crystal display panel or other appropriate display panels, and the invention is not limited to this.

The connection layer 130 is connected between the fingerprint sensing module 110 and the display panel 120, wherein the connection layer 130 is ring-shaped. In other words, there is a light opening in the sensing area corresponding to the fingerprint sensing module 110 to allow the sensing light beam L2 to pass. In this embodiment, the connection layer 130 is made of a non-light-transmitting material, such as a UV curable glue. As a result, during the assembly process, the use of UV curable glue for bonding can increase the chance of reassembly by heating. Therefore, it can replace the full bonding process of optical glue, improve the assembly fault tolerance rate, and further improve the yield rate of manufacturing the electronic device 100. In addition, the use of UV-curable adhesives for close bonding can prevent the interior from being invaded by dust or moisture, so it can improve image clarity. In this embodiment, the connecting layer 130 is, for example, a double-sided tape, but the invention is not limited to this.

The plurality of supporting elements 140 are disposed between the fingerprint sensing module 110 and the display panel 120, and the supporting elements 140 overlap the plurality of shading parts N in the vertical direction D2. In this embodiment, these supporting elements 140 are arranged at intervals between the microlenses M. Specifically, the supporting element 140 is a non-light-transmissive spacer structure, for example, made of a polymer material. For example, the support element 140 can be made of photolithography and etching (Photolithography and Etching Process, PEP), roll to roll (Roll to Roll), precision embossing (Embossing), laminating, printing (Printing) or the above Any combination of manufacturing processes is formed on the fingerprint sensor module 110. These supporting elements 140 do not overlap the light-transmitting holes H of the optical collimating layer 114 in the vertical direction D2. In other words, there is air A between the supporting elements 140, and when the sensing light beam L2 is transmitted from the finger 10 to the fingerprint sensing module 110, it will not be blocked by the supporting elements 140.

In addition, in this embodiment, the supporting element 140 abuts the display panel 120 in a butting manner. In other words, the supporting element 140 is only connected to the fingerprint sensing module 110 by the bottom S2. In this embodiment, the bottom S2 of the supporting element 140 is connected to the spacing platform between two adjacent microlenses M, as shown in FIG. 1. The display panel 120 is connected to the fingerprint sensing module 110 through the connection layer 130, and the supporting element 140 is not directly connected to the display panel 120. Therefore, the distance between the display panel 120 and the fingerprint sensing module 110 can be maintained, so as to prevent the finger 10 from deforming and contacting the fingerprint sensing module 110 when pressing the display panel 120 and causing a Newton ring phenomenon. In addition, the difficulty of removing the electronic device 100 during maintenance can also be reduced.

For a single supporting element 140, the supporting element 140 has a flat top S1, and the area of the top S1 of the supporting element 140 is smaller than the area of the bottom S2. For example, the supporting element 140 is a flat-topped cone-shaped geometric cylinder. Therefore, the ambient light or stray light transmitted from the side can be effectively blocked, thereby improving the clarity of the image. In this way, the display panel 120 can be prevented from contacting or hitting the fingerprint sensing module 110 due to the pressing of the finger 10, thereby causing damage to the display panel 120, thereby increasing the structural strength of the electronic device 100. In different embodiments, the appearance of the supporting element 140 can be any geometric shape, and the area of the top S1 of the supporting element 140 can also be greater than or equal to the area of the bottom S2, and the sensing beam L2 can be directly transmitted to the fingerprint sensor without being blocked.测module 110.

It is worth mentioning that, in this embodiment, in the vertical direction D2, the height of at least one part of the supporting element 140 is different from the height of at least another part of the supporting element 140. For example, in this embodiment, the supporting element 140 includes a plurality of supporting sub-elements 142 and 144 of two or more different heights. In other words, the supporting sub-element 142 with a larger height will preferentially abut the display panel 120, as shown in FIG. 1. Since the height of the support element 140 is different, when the finger presses the display panel 120, the support sub-element 144 with a smaller height can serve as a buffer support for the support sub-element 142 with a larger height when it is pressed. In this way, the permanent deformation of the supporting element 140 after being pressed by the finger 10 can be avoided, and the supporting element 140 can even be damaged, and the supporting element 140 can be kept elastically deformed, so that the overall structure can be quickly restored to its original shape. In this embodiment, the rigidity of the supporting sub-element 142 with a larger height is less than the rigidity of the supporting sub-element 142 with a smaller height.

FIG. 2 is a schematic diagram of the supporting element of FIG. 1 after pressing the display panel. Fig. 3 is a schematic view of the strain curve of the supporting element in Fig. 1. Please refer to Figure 1 to Figure 3. In more detail, each material undergoes a certain degree of deformation after being pressed, as shown in FIG. 2 shows the changes of the supporting element 140_1 before pressing and the supporting element 140_2 after pressing. The greater the pressing force, the greater the degree of deformation of the material, as shown in the line segment 201 shown in FIG. 3. When the pressing force reaches a certain level and the deformation of the material tends to decrease, it means that the material has reached the elastic limit, as shown in the line 202 shown in FIG. 3. Therefore, if the supporting sub-element 142 with a large height is pressed vigorously for a long time or frequently, the supporting sub-element 142 will be gradually damaged and permanently deformed. Therefore, in this embodiment, the height of the supporting sub-element 144 with a smaller height can be further designed to be greater than the minimum height of the supporting sub-element 142 with a larger height before reaching the elastic limit. In this way, the supporting sub-element 142 with a relatively large height can be protected from damage and permanent deformation caused by long-term or frequent strong pressing. In other words, in this embodiment, the height of the supporting sub-element 144 with a smaller height can be designed according to the elastic limit of the supporting sub-element 142 with a larger height, thereby increasing the structural strength and use time of the electronic device 100.

Fig. 4 is a schematic diagram of an electronic device according to another embodiment of the novel creation. Please refer to Figure 4. The electronic device 100A of this embodiment is similar to the electronic device 100 of the embodiment in FIG. 2. The difference between the two lies in that, in the fingerprint sensing module 110A of this embodiment, there is no space between the surfaces of the adjacent microlenses of the optical collimation layer 114A with refractive power. In other words, the microlenses M of the optical collimation layer 114A are continuously arranged, and the bottom S2 of the supporting element 140A is designed to fit between two adjacent microlenses M. It can be seen that the bottom S2 of the supporting element 140A can be adjusted according to the structure of the microlens M.

FIG. 5 is a schematic diagram of an electronic device according to another embodiment of the novel creation. Please refer to Figure 5. The electronic device 100B of this embodiment is similar to the electronic device 100 of the embodiment in FIG. 1. The difference between the two is that, in this embodiment, the supporting element 140B has three different heights of supporting sub-elements 142, 144, 146 and the different heights of supporting sub-elements 142, 144, 146 in the horizontal direction D1. Same as each other. In other words, in the horizontal direction D1, the distribution density of the supporting sub-elements 142 and the distribution density of the supporting sub-elements 144 are the same as the distribution density of the supporting sub-elements 146. In addition, in this embodiment, the height of the supporting sub-element 146 is greater than the minimum height of the supporting sub-element 144 before the elastic limit, and the height of the supporting sub-element 144 is greater than the minimum height of the supporting sub-element 142 before the elastic limit. In this way, the supporting sub-element 142 with a relatively large height can be protected from damage and permanent deformation caused by long-term or frequent strong pressing, thereby effectively maintaining the structural strength and use time of the electronic device 100B.

To sum up, in the electronic device created by the present invention, the display panel and the fingerprint sensing module are connected in a frame-attached manner through the connecting layer, and the display panel and the fingerprint sensing module are equipped with a plurality of supporting elements. To support the display panel to be spaced from the fingerprint sensing module. Therefore, the distance between the display panel and the fingerprint sensing module can be maintained to avoid the occurrence of Newton's ring phenomenon when the finger presses on the display panel to deform and contact the fingerprint sensing module. It can also prevent the fingerprint sensor module from damaging the display panel due to close contact or violent impact, thereby improving the overall structural strength. In addition, the height of at least one part of the supporting element is different from the height of at least another part of the supporting element, and these supporting elements overlap the light shielding parts in the optical collimating layer in the vertical direction. In this way, it can be avoided that the support element cannot be restored from permanent deformation after being pressed by a finger, and may even cause damage to the support element, thereby maintaining good elastic deformation of the support element, so that the overall structure can be quickly restored to its original shape.

Although the creation of this new type has been disclosed in the above embodiments, it is not intended to limit the creation of this new type. Anyone with ordinary knowledge in the technical field can make some changes and changes without departing from the spirit and scope of the new creation. Retouching, therefore, the scope of protection of the creation of the new model shall be subject to the scope of the attached patent application.

10: fingers 100, 100A, 100B: electronic device 110,110A: fingerprint sensor module 112: photosensitive element 114, 114A: Optical collimation layer 120: display panel 130: connection layer 140, 140_1, 140_2, 140A, 140B: support element 142,144: Support sub-elements 201,202: line segment S1: top S2: bottom A: Air D1: Horizontal direction D2: vertical direction H: light hole L1: Illumination beam L2: Sensing beam M: Micro lens N: Shading part

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the new creation. FIG. 2 is a schematic diagram of the supporting element of FIG. 1 after pressing the display panel. Fig. 3 is a schematic view of the strain curve of the supporting element in Fig. 1. Fig. 4 is a schematic diagram of an electronic device according to another embodiment of the novel creation. FIG. 5 is a schematic diagram of an electronic device according to another embodiment of the novel creation.

10: fingers

100: electronic device

110: Fingerprint sensor module

112: photosensitive element

114: Optical collimation layer

120: display panel

130: connection layer

140: support element

142,144: Support sub-elements

S1: top

S2: bottom

A: Air

D1: Horizontal direction

D2: vertical direction

H: light hole

L1: Illumination beam

L2: Sensing beam

M: Micro lens

N: Shading part

Claims (10)

An electronic device including: A fingerprint sensing module to receive a sensing beam, the fingerprint sensing module including a photosensitive element and an optical collimation layer; The display panel is configured on the fingerprint sensing module and provides an illumination beam to the finger to reflect the sensing beam; A connection layer connected between the fingerprint sensing module and the display panel, the connection layer is ring-shaped; and A plurality of supporting elements are arranged between the fingerprint sensing module and the display panel, the height of at least a part of the plurality of supporting elements is different from the height of at least another part of the plurality of supporting elements, Wherein, the optical collimation layer includes a plurality of light-shielding parts spaced apart from each other, and the plurality of support elements overlap the light-shielding parts in a vertical direction. The electronic device according to claim 1, wherein the optical collimation layer includes a plurality of microlenses having intervals with each other, and the plurality of supporting elements are arranged at the intervals of the plurality of microlenses. The electronic device according to claim 1, wherein the plurality of supporting elements includes a plurality of supporting sub-elements of two or more different heights. The electronic device according to claim 3, wherein the rigidity of the part with the larger height of the plurality of supporting subelements is less than the rigidity of the part with the smaller height of the plurality of supporting subelements. The electronic device according to claim 3, wherein the largest height of the plurality of supporting sub-elements abuts the display panel. The electronic device according to claim 1, wherein the plurality of supporting elements are flat-topped cones. The electronic device according to claim 3, wherein the horizontal distribution density of the plurality of supporting subelements of different heights is the same as each other. The electronic device according to claim 1, wherein there is air between the optical collimation layer and the plurality of supporting elements. The electronic device according to claim 1, wherein the material of the plurality of supporting elements is a polymer material. The electronic device according to claim 1, wherein the connection layer is opaque.

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