electronic devices

Abstract

The present disclosure relates to an electronic device, which belongs to the field of electronic device fingerprint recognition technology. The electronic device includes: a liquid crystal display panel and a fingerprint recognition component. The liquid crystal display panel includes a light-transmitting portion for transmitting infrared light; the fingerprint recognition component is arranged corresponding to the light-transmitting portion, and includes a transmitting portion and a receiving portion, the transmitting portion is used to transmit a first infrared light to the light-transmitting portion so that the first infrared light is emitted from the liquid crystal display panel; the receiving portion is used to receive a second infrared light incident from the light-transmitting portion, and obtain fingerprint information based on the second infrared light, where the second infrared light is the first infrared light reflected by an external target.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fingerprint recognition of electronic devices, and in particular to an electronic device. Background Art

[0002] Fingerprint recognition is a crucial component in electronic devices. For devices with LCD displays, the fingerprint recognition component is typically placed on the back or side of the device. However, this approach can result in a poor user experience, and a rear-mounted fingerprint recognition component can also compromise the integrity of the device's back cover. Summary of the Invention

[0003] The present disclosure provides an electronic device to solve the technical deficiencies in the related art.

[0004] According to an embodiment of the present disclosure, an electronic device is provided, comprising: a liquid crystal display panel and a fingerprint recognition component;

[0005] The liquid crystal display panel includes a light-transmitting portion for transmitting infrared light;

[0006] The fingerprint recognition component is arranged corresponding to the light-transmitting portion and includes:

[0007] an emitting portion, configured to emit a first infrared light toward the light-transmitting portion so that the first infrared light exits the liquid crystal display panel, and

[0008] The receiving unit is configured to receive the second infrared light incident from the light-transmitting unit and obtain fingerprint information based on the second infrared light, where the second infrared light is the first infrared light reflected by an external target.

[0009] In one embodiment, the liquid crystal display panel further includes a backlight assembly, and the light-transmitting portion forms a light-transmitting area on a lower surface of the backlight assembly;

[0010] The fingerprint recognition component is located below the liquid crystal display panel and is arranged corresponding to the light-transmitting area.

[0011] In one embodiment, the light-transmitting portion includes a light-transmitting hole disposed through the backlight assembly.

[0012] In one embodiment, the diameter of the light-transmitting hole is less than or equal to 1 mm.

[0013] In one embodiment, the backlight assembly comprises:

[0014] a light guide, comprising a reflective layer at the bottom; and

[0015] a supporting member connected to the reflective layer and carrying the light guide member;

[0016] The backlight assembly is further provided with a recess, which forms an opening on the support member and at least penetrates the reflective layer; the light-transmitting portion includes a filter element provided at the recess, which allows infrared light to pass through and blocks visible light.

[0017] In one embodiment, the liquid crystal display panel further includes a display component located on the backlight assembly, the display component includes a plurality of pixels; the light-transmitting portion further includes: a transparent portion located between adjacent pixels in the display component.

[0018] In one embodiment, the fingerprint recognition component is disposed below the liquid crystal display panel;

[0019] The light-transmitting portion includes a light-guiding unit, which is arranged on the side of the liquid crystal display panel and includes: a first light-passing surface facing above the liquid crystal display panel, and a second light-passing surface facing the fingerprint recognition component.

[0020] In one embodiment, the liquid crystal display screen further comprises a display assembly and a cover plate disposed on the display assembly, wherein the cover plate is disposed beyond the display assembly;

[0021] The light guide unit is arranged on a side of the display assembly, and the first light passing surface is arranged toward a portion of the cover plate that extends beyond the display assembly.

[0022] In one embodiment, the receiving unit includes: a photosensitive element and a signal processing element disposed on the same surface;

[0023] The photosensitive element senses the second infrared light and outputs a sensing signal;

[0024] The signal processing component is connected to the photosensitive component and is used to convert the sensing signal into a detection signal.

[0025] In one embodiment, the liquid crystal display panel further comprises a display component having a liquid crystal layer;

[0026] The light-transmitting portion is arranged above the liquid crystal layer, and the fingerprint recognition component is arranged between the light-transmitting portion and the liquid crystal layer.

[0027] In one embodiment, the liquid crystal layer is formed with a plurality of pixels, and the emitting portion and the receiving portion are provided corresponding to portions between adjacent pixels.

[0028] In one embodiment, the fingerprint recognition component is disposed in a set area of ​​the liquid crystal display panel;

[0029] The transmitting part includes a plurality of transmitting elements, and the receiving part includes a plurality of photosensitive elements;

[0030] The plurality of emitting elements are evenly distributed in the set area, and the plurality of photosensitive elements are evenly distributed in the set area.

[0031] The electronic device provided by the present disclosure has at least the following beneficial effects:

[0032] By providing a light-transmitting portion on the LCD panel, the first infrared light emitted by the fingerprint sensor located below the LCD panel can be emitted from the LCD panel, while the second infrared light from outside the electronic device can penetrate the LCD panel and be received by the fingerprint recognition sensor. This enables under-screen fingerprint recognition with an LCD panel, further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0034] Figure 1 is a schematic structural diagram of an electronic device according to an exemplary embodiment;

[0035] Figure 2 is a schematic structural diagram of a liquid crystal display panel according to an exemplary embodiment;

[0036] Figure 3 is a schematic structural diagram of a receiving unit according to an exemplary embodiment;

[0037] Figure 4 is a schematic structural diagram of an electronic device according to another exemplary embodiment;

[0038] Figure 5 is a schematic structural diagram of an electronic device according to another exemplary embodiment;

[0039] Figure 6 is a schematic structural diagram of an electronic device according to another exemplary embodiment;

[0040] Figure 7 is a schematic structural diagram of an electronic device according to another exemplary embodiment;

[0041] Figure 8 is a schematic structural diagram of an electronic device according to another exemplary embodiment. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0043] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meaning understood by a person of ordinary skill in the art to which this disclosure belongs. The use of "a" or "an," and similar terms in this disclosure and the claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. Unless otherwise indicated, the use of "include" or "comprises," and similar terms means that the elements or objects preceding "include" or "comprises" include the elements or objects listed after "include" or "comprises," and their equivalents, and does not exclude other elements or objects. The use of "connected" or "connected" and similar terms is not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this disclosure and the claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein is intended to encompass any and all possible combinations of one or more of the associated listed items.

[0044] The present disclosure provides an electronic device having a liquid crystal display panel and a method for installing a fingerprint recognition component. In the present disclosure, the side of the liquid crystal display panel facing the outside of the electronic device (i.e., the display surface) is referred to as "upper" or "top," and the side of the liquid crystal display panel located inside the electronic device is referred to as "lower" or "bottom."

[0045] Figure 1 FIG. 1 is a schematic diagram showing the structure of an electronic device according to an exemplary embodiment. Figure 1 As shown, the electronic device includes a liquid crystal display panel 100 and a fingerprint recognition component 200.

[0046] Figure 2 FIG is a schematic structural diagram of a liquid crystal display panel according to an exemplary embodiment. Figure 2 As shown, the liquid crystal display panel 100 includes a backlight assembly 110, a display assembly 120, and a cover plate 130 arranged in sequence from bottom to top.

[0047] The backlight assembly 110 includes a light source 111 , a light guide 112 and a support 113 .

[0048] Illustratively, the light guide 112 includes a reflective layer 112a, a light guiding layer 112b, and a light homogenizing layer 112c, arranged from bottom to top. Light from the light source 111 is guided toward the display assembly 120 by the light guiding layer 112b and the reflective layer 112a, and is uniformly emitted toward the display assembly 120 by the light homogenizing layer 112c. Illustratively, the light source 111 is disposed on a side of the light guide 112. The light guide 112 receives the light from the light source 111 and guides it toward the display assembly 120, thereby emitting the light toward the display assembly 120.

[0049] The support member 113 is used to support the light source 111 and the light guide 112. Optionally, the support member 113 is formed with a mounting cavity, and the light source 111 and the light guide 112 are disposed in the mounting cavity. The mounting cavity has an opening disposed toward the display assembly 120 for light to penetrate.

[0050] The display assembly 120 includes a first polarizer 121 , a driving layer 122 , a liquid crystal layer 123 , a coloring layer 124 , and a second polarizer 125 , which are arranged from bottom to top.

[0051] The liquid crystal layer 123 includes a spacer 123a, which forms a plurality of receiving spaces 123b. Each receiving space 123b is filled with liquid crystal. The drive layer 122 includes a drive circuit for independently controlling the flipping of the liquid crystal in each receiving space. The coloring layer 124 includes a red filter, a blue filter, and a green filter. One filter is provided for each receiving space 123b of the liquid crystal layer 123. In this case, the portion of the display component 120 corresponding to the red filter forms a red pixel, the portion corresponding to the green filter forms a green pixel, and the portion corresponding to the blue filter forms a blue pixel.

[0052] The first polarizer 121 and the second polarizer 125 are arranged with polarization directions orthogonal to each other. Consequently, light emitted by the backlight assembly 110 is polarized in the first direction after passing through the first polarizer 121. By driving the liquid crystal to flip, the polarization direction of the light passing through the liquid crystal can be changed. When light passing through the liquid crystal is polarized in the second direction, it is emitted from the second polarizer 125. When light passing through the liquid crystal is still polarized in the first direction, it cannot be emitted from the second polarizer 125.

[0053] Based on the above, the backlight assembly 110 provides light source for the display assembly 120 , and the driving circuit 122 controls the liquid crystal corresponding to each pixel to flip, so that the display assembly displays an image.

[0054] In addition, the cover plate 130 is disposed on the display assembly 120 to ensure the structural safety of the display assembly 120. Optionally, the cover plate 130 is disposed beyond the display assembly 120 to form a display surface in the electronic device.

[0055] And, continue to refer to Figure 1 The liquid crystal display panel 100 provided in the embodiment of the present disclosure is provided with a light-transmitting portion 140, which is used to penetrate infrared light and support the fingerprint recognition component 200 to realize the fingerprint recognition function.

[0056] The fingerprint recognition component 200 is an optical fingerprint recognition component, including a transmitting unit 210 and a receiving unit 220 .

[0057] The emitting unit 210 is configured to emit the first infrared light toward the light-transmitting unit 140, so that the first infrared light is emitted from the light-transmitting unit 140 out of the liquid crystal display panel 100. Optionally, the emitting unit 210 is a light-emitting diode or a light-emitting diode array.

[0058] The receiving unit 220 is configured to receive the second infrared light emitted by the light-transmitting unit 140 and obtain fingerprint information based on the second infrared light, wherein the second infrared light is the first infrared light reflected by an external object (eg, a user's finger).

[0059] Figure 3 FIG. 1 is a schematic diagram showing the structure of a receiving unit according to an exemplary embodiment. Figure 3 As shown, the receiving unit 220 includes a photosensitive element 221 and a signal processing element 222. The photosensitive element 221 (e.g., a photodiode or a photodiode array) senses the second infrared light and outputs a sensing signal. The signal processing element is connected to the photosensitive element and is used to convert the sensing signal into a detection signal.

[0060] Furthermore, the photosensitive element 221 and the signal processing element 222 are coplanar. For example, the photosensitive element 221 and the signal processing element 222 are arranged on the same side of a circuit board. This reduces the thickness of the receiving unit 220. This prevents the fingerprint recognition component from occupying excessive space, facilitating the rational design of the electronic device's internal architecture.

[0061] The electronic device provided by the present disclosure implements an under-screen fingerprint recognition function when equipped with a liquid crystal display panel. This solves the problem of poor user experience when the fingerprint recognition component is placed on the side or back cover of the electronic device.

[0062] In the embodiment of the present disclosure, the fingerprint recognition component 200 is disposed below the liquid crystal display panel 100 or integrated inside the liquid crystal display panel 100. Based on the different configurations of the fingerprint recognition component 200 and the liquid crystal display panel 100, the light-transmitting portion 140 also has multiple implementations. Figures 4 to 8 The following is a schematic diagram of the structure of an electronic device according to different exemplary embodiments. Figures 4 to 8 Detailed explanation.

[0063] In the first case, the fingerprint recognition component 200 is disposed below the liquid crystal display panel 100 .

[0064] In one embodiment, Figure 4 or Figure 5 As shown, the light-transmitting portion forms a light-transmitting area 141 on the lower surface of the backlight assembly 110. The fingerprint recognition component 200 is located below the liquid crystal display panel 100 and is disposed corresponding to the light-transmitting area 141.

[0065] As an example, Figure 4 As shown, the light-transmitting portion includes a light-transmitting hole 140a provided through the backlight assembly 110. The light-transmitting hole 140a extends through the thickness of the backlight assembly 110. Furthermore, the opening of the light-transmitting hole 140a on the lower surface of the backlight assembly 110 forms a light-transmitting area 141. The light-transmitting hole 140a enables the fingerprint recognition assembly 200 to be positioned below the liquid crystal display panel 100. In this case, the infrared light output by the transmitting unit 210 of the fingerprint recognition assembly 200 can pass through the light-transmitting hole 140a and penetrate the backlight assembly 110.

[0066] Optionally, the light-transmitting portion includes an array of light-transmitting holes 140a disposed within a set area of ​​the backlight assembly 110, and the fingerprint recognition assembly 200 is disposed below the backlight assembly 110 corresponding to the set area. The diameter of each light-transmitting hole 140a is less than or equal to 1 mm (e.g., 0.5 mm, 0.25 mm, 0.1 mm, etc.). In this manner, light-transmitting holes 140a are provided only within the set area of ​​the backlight assembly 110, and the diameter of the light-transmitting holes 140a is controlled, thereby reducing the impact of the light-transmitting holes 140a on the uniformity of light emission from the backlight assembly 110 and ensuring the structural stability of the backlight assembly 110.

[0067] Furthermore, the display component 120 in the liquid crystal display panel 100 includes a transparent portion located between adjacent pixels. For example, the spacer 123a in the liquid crystal layer 123 is formed of a light-transmitting material, and the spacer 123a forms a light-transmitting portion between adjacent pixels. A light-shielding member is provided on the sidewall of the spacer 123a to prevent interference between adjacent pixels. Accordingly, the first infrared light output by the transmitting unit 210 is able to be emitted from the backlight assembly 110 and the display component 120. Furthermore, the second infrared light reflected by the target object is able to penetrate the liquid crystal display panel 100 and be received by the fingerprint recognition component 200.

[0068] As an example, Figure 5As shown, backlight assembly 110 is provided with a recess 110a. This recess 110a forms an opening on the surface of support member 113 and is recessed at least to the reflective layer 112a in light guide member 112. The opening formed by recess 110a in support member 113 forms a light-transmitting region 141. The light-transmitting portion includes a filter 140b disposed in recess 110a. This filter 140b allows infrared light to pass through and blocks visible light. In this way, the reflection effect of reflective layer 112a in light guide member 112 on the first and second infrared lights is weakened, allowing the first and second infrared lights to pass through filter 140b and into backlight assembly 110.

[0069] Furthermore, the display assembly 120 in the liquid crystal display panel 100 includes a transparent portion located between adjacent pixels. Therefore, the first infrared light emitted from the backlight assembly 110 can pass through the transparent portion in the display assembly 120 and exit the liquid crystal display panel 100. The second infrared light reflected by an external object passes through the transparent portion and enters the display assembly 120, and then enters the backlight assembly 110.

[0070] In one embodiment, Figure 6 As shown, the fingerprint recognition component 200 is disposed below the liquid crystal display panel 100 .

[0071] The light-transmitting portion includes a light-guiding unit 140c. This light-guiding unit 140c is disposed on the side of the liquid crystal display panel 100. For example, the light-guiding unit 140c is disposed on the side of the backlight assembly 110 and the display assembly 120. Furthermore, the light-guiding unit 140c includes a first light-transmitting surface X1 facing upward from the liquid crystal display panel and a second light-transmitting surface X2 facing the fingerprint recognition component.

[0072] In this manner, the first infrared light emitted by the transmitting unit 210 in the fingerprint recognition component 200 enters the light guide unit 140c through the second light-transmitting surface X2, and then exits the light guide unit 140c through the first light-transmitting surface X1. The receiving unit 220 in the fingerprint recognition component 200 receives the second infrared light, which is captured by the first light-transmitting surface X1 and then exits the light guide unit 140c through the second light-transmitting surface X2. This also enables under-screen fingerprint recognition.

[0073] The light guide unit 140 may be a special-shaped light guide prism, which can be used to guide infrared light by etching light guide textures on the light guide prism and providing an infrared light reflective film on the outer surface of the light guide prism.

[0074] Optionally, the first light passing surface X1 of the light guide unit 140c is aligned with the portion of the cover plate 130 extending beyond the display assembly 120. Thus, the light guide unit 140c is not easily visible from the outside of the electronic device, giving priority to the appearance of the electronic device.

[0075] In the second case, the fingerprint recognition component 200 is integrated into the liquid crystal display panel 100 .

[0076] like Figure 7 As shown, the light-transmitting portion 140 is disposed above the liquid crystal layer 123. Figure 2 The light-transmitting portion 140 includes a coloring layer 124, a second polarizer 125, and a cover plate 130 disposed above the liquid crystal layer 123. At this time, the fingerprint recognition component 200 is disposed between the light-transmitting portion 140 and the liquid crystal layer 123.

[0077] Alternatively, as Figure 8 As shown, the transmitter 210 and the receiver 220 are disposed between adjacent pixels. In other words, the transmitter 210 and the receiver 220 are disposed between adjacent receiving spaces 123b in the liquid crystal layer 123. This prevents the transmitter 210 and the receiver 220 from blocking pixels and affecting the display quality of the liquid crystal display.

[0078] Further optionally, the photosensitive element 222 of the receiving part 220 is arranged corresponding to the portion between adjacent pixels, and the signal processing element 222 in the receiving part 220 is arranged outside the liquid crystal display screen and connected to the photosensitive element 222 through a lead wire.

[0079] The fingerprint recognition assembly 200 is disposed within a designated area X3 of the liquid crystal display panel 100. Optionally, the transmitting unit 210 includes multiple transmitting elements 211, and the receiving unit 220 includes multiple photosensitive elements 222. The multiple transmitting elements 211 are evenly distributed within the designated area X3; similarly, the multiple photosensitive elements 222 are also evenly distributed within the designated area X3. Optionally, the transmitting elements 211 and photosensitive elements 222 are alternately disposed. For example, one transmitting element 211 is surrounded by at least four photosensitive elements 222.

[0080] In this way, the area where the emitting element 211 is located and the area where the photosensitive element 222 is located are overlapped as much as possible, so as to increase the intensity of the second infrared light received by the photosensitive element 222, thereby improving the recognition accuracy.

[0081] The electronic device provided by the embodiments of the present disclosure provides an implementation solution for under-screen fingerprint recognition for liquid crystal display panels. This electronic device can enhance the user experience and avoid the poor user experience shortcomings of related electronic devices with side or rear-mounted fingerprint recognition.

[0082] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

Claims

1. An electronic device, characterized in that: The electronic device comprises: a liquid crystal display panel and a fingerprint recognition component; The liquid crystal display panel includes a light-transmitting portion for transmitting infrared light; the light-transmitting portion includes: a transparent portion located between adjacent pixels in the display assembly; the liquid crystal layer includes a spacer, and the spacer forms the transparent portion between adjacent pixels; The fingerprint recognition component is arranged corresponding to the light-transmitting portion and includes: an emitting portion, configured to emit a first infrared light toward the light-transmitting portion so that the first infrared light exits the liquid crystal display panel, and a receiving unit, configured to receive a second infrared light incident from the light-transmitting unit and acquire fingerprint information based on the second infrared light, wherein the second infrared light is the first infrared light reflected by an external target; the receiving unit includes a photosensitive element and a signal processing element; The liquid crystal display panel further includes a display component having a liquid crystal layer; The light-transmitting portion is arranged above the liquid crystal layer, and the fingerprint recognition component is arranged between the light-transmitting portion and the liquid crystal layer; The liquid crystal layer is formed with a plurality of pixels, and the transmitting portion and the receiving portion are arranged corresponding to the portions between adjacent pixels; The fingerprint recognition component is arranged in a set area of ​​the liquid crystal display panel; The transmitting part includes a plurality of transmitting elements, and the receiving part includes a plurality of photosensitive elements; The plurality of emitting elements are evenly distributed in the set area, the plurality of photosensitive elements are evenly distributed in the set area, and the emitting elements and the photosensitive elements are arranged alternately.

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