CN211349380U - Fingerprint recognition device under screen and electronic equipment - Google Patents
Fingerprint recognition device under screen and electronic equipment Download PDFInfo
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- CN211349380U CN211349380U CN201922149886.7U CN201922149886U CN211349380U CN 211349380 U CN211349380 U CN 211349380U CN 201922149886 U CN201922149886 U CN 201922149886U CN 211349380 U CN211349380 U CN 211349380U
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Abstract
The utility model provides a fingerprint recognition device and electronic equipment under screen. The under-screen fingerprint identification device comprises a light source and a fingerprint sensor; the light source is arranged below the edge area of the protective cover plate of the liquid crystal display screen, is fixed in the first groove of the middle frame of the electronic equipment and is used for emitting detection light to the finger above the liquid crystal display screen, wherein the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger; fingerprint sensor sets up in liquid crystal display's backlight unit below for the fingerprint that the receipt passed liquid crystal display detects the light, in order to obtain the fingerprint information of finger. Because the light source is fixed in the first groove of the middle frame, the size of the light source protruding out of the inner surface of the middle frame can be reduced, the width of a chin area is reduced, and the screen occupation ratio of the display panel is improved.
Description
Technical Field
The utility model relates to a biological identification technical field especially relates to a fingerprint recognition device and electronic equipment under screen.
Background
With the pursuit of high screen occupation ratio of users to electronic devices such as mobile phones, the under-screen fingerprint identification device is gradually applied to various electronic devices.
Generally, a mobile phone supporting an underscreen fingerprint identification function includes an underscreen fingerprint identification device, a display panel and a backlight module located below the display panel, where the underscreen fingerprint identification device includes a sensor and a light source; the sensor is located backlight unit below, and the light source is located display panel's side, and the light source is fixed in the internal surface of cell-phone center.
However, in the mobile phone, the chin area where the light source is installed is too wide, which results in a low screen occupation ratio of the mobile phone.
SUMMERY OF THE UTILITY MODEL
The utility model provides a fingerprint recognition device and electronic equipment under screen to overcome present electronic equipment's the regional too wide problem of chin.
The embodiment of the utility model provides a fingerprint identification device under screen, be applicable to the electronic equipment who has liquid crystal display to realize optical fingerprint detection under the screen, the fingerprint detection zone of fingerprint identification device under screen is located liquid crystal display's display area, and fingerprint identification device under screen includes light source and fingerprint sensor; the light source is arranged below the edge area of the protective cover plate of the liquid crystal display screen, is fixed in the first groove of the middle frame of the electronic equipment and is used for emitting detection light to a finger above the liquid crystal display screen, wherein the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger; the fingerprint sensor is arranged below the backlight module of the liquid crystal display screen and used for receiving the fingerprint detection light passing through the liquid crystal display screen so as to obtain the fingerprint information of the finger.
The device for identifying fingerprints under screen as described above, wherein the light source and the display panel are arranged side by side below the protective cover plate, and an axis of the detection light emitted by the light source is inclined towards a direction approaching the fingerprint detection area.
The fingerprint identification device under screen, wherein the first groove is opened on the inner surface of the middle frame facing the display panel of the liquid crystal display screen and extends along a direction parallel to the protective cover plate.
The device for identifying fingerprints under screen is characterized in that a plane parallel to the display panel is taken as a cross section, the cross section area of the first groove is larger than that of the light source, and a first adhesive layer is arranged between the inner surface of the first groove and the light source.
The device for identifying fingerprints under the screen is characterized in that a plurality of first grooves are arranged at intervals in the middle frame along a direction parallel to the display panel, and one light source is arranged in each first groove.
The fingerprint identification device under screen, wherein the first circuit board is fixed on the middle frame, the light source is fixed on the first circuit board, and the light source is located on one side of the first circuit board, which is far away from the display panel.
The underscreen fingerprint identification device is characterized in that the first circuit board is bonded to the middle frame through a second bonding layer.
The device for identifying fingerprints under the screen is characterized in that a second groove is further formed in the inner surface, facing the display panel of the liquid crystal display screen, of the middle frame, and the second adhesive layer is accommodated in the second groove.
The underscreen fingerprint identification device as described above, wherein a depth of the second groove in a direction perpendicular to the inner surface of the middle frame is equal to a thickness of the second adhesive layer.
The fingerprint identification device under screen, wherein the second adhesive layer is disposed on both sides of the first groove along a direction parallel to the display panel.
The fingerprint identification device under screen, wherein the first circuit board is attached and fixed to the inner surface of the middle frame facing the display panel of the liquid crystal display screen.
The fingerprint identification device under screen, wherein the inner surface of the middle frame is further provided with a third groove, and the first circuit board is arranged in the third groove.
The underscreen fingerprint identification device as described above, wherein a depth of the third groove in a direction perpendicular to the inner surface of the middle frame is equal to a thickness of the first circuit board.
The device for identifying fingerprints under the screen is characterized in that a part of the first circuit board facing the light source is provided with a transmission part, the transmission part is used for allowing the detection light to emit to the fingerprint detection area, and the routing of the first circuit board is located at the periphery of the transmission part.
An embodiment of the utility model provides an electronic equipment, include: the device comprises a middle frame, a liquid crystal display screen and the fingerprint identification device under the screen; the fingerprint identification device reaches liquid crystal display with center fixed connection.
The utility model provides an underscreen fingerprint identification device and electronic equipment is applicable to the electronic equipment with liquid crystal display screen to realize the underscreen optical fingerprint detection, the fingerprint detection area of the underscreen fingerprint identification device is positioned in the display area of the liquid crystal display screen, and the underscreen fingerprint identification device comprises a light source and a fingerprint sensor; the light source is arranged below the edge area of the protective cover plate of the liquid crystal display screen, is fixed in the first groove of the middle frame of the electronic equipment and is used for emitting detection light to the finger above the liquid crystal display screen, wherein the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger; fingerprint sensor sets up in liquid crystal display's backlight unit below for the fingerprint that the receipt passed liquid crystal display detects the light, in order to obtain the fingerprint information of finger. Because the light source is fixed in the first groove of the middle frame, the size of the light source protruding out of the inner surface of the middle frame can be reduced, the width of a chin area is reduced, and the screen occupation ratio of the display panel is improved.
Drawings
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and the present invention is not limited to the embodiments described below.
Fig. 1 is a schematic view of an overall structure of an electronic device according to an embodiment of the present invention;
FIG. 2 is a first top view of the light source of FIG. 1;
FIG. 3 is another top view of the light source of FIG. 1;
fig. 4 is a schematic structural view of the inner surface of the middle frame shown in fig. 1.
Description of reference numerals:
100: a display panel;
200: a backlight module;
310: a light source;
311: soldering tin;
320: a first circuit board;
321: a transmission section;
330: a second circuit board;
340: a fingerprint sensor;
350: a macro lens;
360: a first adhesive layer;
370: a second adhesive layer;
400: a middle frame;
410: an inner surface;
420: a top surface;
430: a first groove;
440: a second groove;
450: a third groove;
500: a main board;
600: and a protective cover plate.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and the present invention is not limited to the embodiments described below.
Fig. 1 is a schematic view of an overall structure of an electronic device according to an embodiment of the present invention. FIG. 2 is a first top view of the light source of FIG. 1; fig. 4 is a schematic structural view of the inner surface of the middle frame shown in fig. 1.
Referring to fig. 1, 2 and 4, the present embodiment provides an underscreen fingerprint identification apparatus, where an electronic device may be a mobile phone, a tablet computer, or other intelligent terminal with a liquid crystal display, or other electronic devices, the electronic device includes a liquid crystal display and an underscreen fingerprint identification apparatus, the liquid crystal display may include a display panel 100 and a backlight module 200, and the underscreen fingerprint identification apparatus includes: a fingerprint sensor 340 and a light source 310. The fingerprint sensor 340 can be arranged below the backlight module 200, the light source 310 is used for emitting detection light to the finger, the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger; the fingerprint sensor 340 is used for receiving fingerprint detection light to obtain fingerprint information of a finger.
The Display panel 100 may be a Liquid Crystal Display (LCD) panel. Above the display panel 100, a protective cover 600 may be disposed, the protective cover 600 may be a glass cover or a sapphire cover, at least a portion of the surface of the protective cover 600 may form a fingerprint detection area, and more specifically, the fingerprint detection area may be a sensing area of the protective cover 600 for the fingerprint sensor 340, and is at least partially located within a display area of the liquid crystal display panel.
The backlight module 200 may be disposed at the bottom of the display panel 100, that is, below the display panel 100 departing from the protective cover 600, and the backlight module 200 may be configured to provide a uniform surface light source for the display panel 100, so that the display panel emits light to display a picture on the liquid crystal display.
The backlight module 200 is generally an opaque structure. More specifically, the backlight assembly 200 generally includes a backlight source and an optical film assembly, such as a light guide plate, a brightness enhancement film, a light homogenizing film, a reflective sheet, a steel plate, etc., wherein a portion of the optical film is a non-light-transmissive film or a non-completely light-transmissive film.
Alternatively, the optical film of the backlight module 200 may be a film material having different optical characteristics for different wavelength bands of light sources, such as high transmittance for the detection light (e.g. infrared light) emitted by the light source 310, and may have the optical characteristics of the conventional film material itself for visible light, such as optical brightening, optical fogging, reflection, etc.
In this embodiment, the middle frame 400 may be disposed in the electronic device, the middle frame 400 is mainly used for supporting and mounting the liquid crystal display, and may also be used for mounting other functional components of the electronic device, such as the camera assembly and the motherboard 500, and the middle frame 400 may be made of various materials, for example, the middle frame 400 may be made of materials with higher strength, such as metal and plastic, so as to achieve the supporting and fixing effects.
It is understood that, in order to realize the driving of the display panel 100, a flexible circuit board may be connected to one side edge of the display panel 100; the middle frame 400 may have an inner surface facing the side of the display panel 100. The inner surface may be recessed into a first groove 430 in a direction away from the display panel 100.
The under-screen fingerprint identification device may include the light source 310, the light source 310 may be disposed in the first groove 430, the light source 310 may be specifically located under the edge region of the protective cover 600 and disposed side by side with the display panel 100 of the liquid crystal display, and, in a specific embodiment, an axis of the probe light emitted from the light source 310 is obliquely disposed toward a direction close to the fingerprint detection area to irradiate a finger located above the fingerprint detection area of the liquid crystal display.
The light source 310 may be an infrared light source capable of emitting infrared rays of a specific wavelength. The specific wavelength may be 850nm or 940 nm. The infrared ray that this light source sent can regard as fingerprint detection's detecting light, and penetrating finger and scattering in the finger after the finger that the detecting light shines fingerprint detection area 700 top, and the light that comes out after the scattering transmits out and forms the fingerprint detection light that carries finger fingerprint information from the finger surface, and the fingerprint detection light can further pass display panel 100 and backlight unit 200 to gather by fingerprint sensor 340.
The fingerprint sensor 340 may be an optical imaging chip or an optical image sensor chip, which may also be referred to as an optical fingerprint sensor chip, and may be carried on the second circuit board 330 and electrically connected to the second circuit board 330 through metal leads. The fingerprint sensor 340 may specifically include an optical sensing array having a plurality of optical sensing units and a light path guiding structure formed over the optical sensing array. The light path guiding structure is used for guiding the fingerprint detection light formed by the detection light emitted by the light source 310 irradiating the finger and passing through the liquid crystal display screen to the optical sensing array.
As a specific example, the optical path guiding structure may include a macro lens 350 having at least one spherical or aspheric lens, and a lens barrel or a lens holder for carrying the macro lens, the lens barrel or the lens holder is disposed above the second circuit board 330 and forms a closed space with the second circuit board 330, and the optical sensing array and the optical filter above the optical sensing array may be disposed in the closed space and located in the converging optical path of the macro lens 350; the macro lens 350 is used for guiding or converging the fingerprint detection light passing through the backlight module 200 to the optical sensing array to realize optical fingerprint imaging of the finger in the optical sensing array.
As another specific embodiment, the optical path guiding structure may also be an optical path guiding layer formed above the optical sensing array by a semiconductor process, the optical path guiding layer may include a microlens array and a plurality of light blocking layers located between the microlens array and the optical sensing array, the plurality of light blocking layers respectively define a plurality of transmission optical paths between the microlens array and the optical sensing array through openings, and each microlens of the microlens array may respectively focus the fingerprint detection light to its corresponding transmission optical path and transmit the fingerprint detection light to the corresponding optical sensing unit through the transmission optical path.
In addition, the fingerprint sensor 340 may further include a filter for filtering out ambient light or other interference light entering the optical sensing array, for example, the filter may allow a wavelength band in which an infrared light signal corresponding to fingerprint detection light is located to pass through, and filter out light signals in other wavelength bands. The filter can be formed above the optical sensing array or the optical path guide structure directly in a film coating mode.
The second circuit board 330 may be a flexible circuit board or a printed circuit board. The macro lens 350 may be a structure capable of converging light, such as a lens, which may enable the fingerprint detection light to be emitted to the fingerprint sensor 340 more, thereby improving the reliability and accuracy of fingerprint identification.
In this embodiment, the light source 310 is fixed in the first groove 430 of the middle frame 400, and the shape of the first groove 430 may be various, for example, the plane parallel to the display panel 100 is taken as the cross section, and the cross section of the first groove 430 may be rectangular or circular arc, and the like, and may be specifically set according to the shape of the light source 310. Alternatively, the first recess 430 may have an opening facing the side of the display panel 100, and the light source 310 may be obliquely disposed in the first recess 430 so that the probe light emitted from the light source 310 may be directed to the fingers above the protective cover 600.
It is understood that, in order to avoid the exposure of the structures such as the flexible circuit board or the light source 310 of the display panel 100, the electronic device covers the area with a material opaque to visible light to shield the circuit and the light source 310 structure, and the area is collectively referred to as the chin area of the electronic device, and the larger the width of the chin area is, the smaller the screen occupation ratio of the electronic device is.
The under-screen fingerprint identification device of the embodiment can fix the light source 310 in the first groove 430, and compared with the prior art in which the light source is arranged on the inner surface of the middle frame 400, the space of the chin area occupied by the light source 310 can be reduced, so that the width of the chin area is shortened, and the screen occupation ratio of the electronic device is improved.
When the fingerprint is detected by the off-screen fingerprint identification device of the embodiment, the light source 310 emits detection light to the finger above the liquid crystal display screen, and the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger; the fingerprint sensor receives fingerprint detection light passing through the liquid crystal display screen to obtain fingerprint information of a finger.
In an alternative embodiment, the first groove 430 is disposed on an inner surface of the middle frame 400 facing the display panel 100 of the liquid crystal display panel, and extends in a direction parallel to the protective cover 600. That is, the inner surface 410 of the first recess 430 has a side opening, the light source 310 can be installed into the first recess 430 from the side opening, and at least a part of the probe light emitted from the light source 310 can penetrate the protective cover 600 through the upper opening to be emitted to the finger, so that the light source 310 can be vertically disposed (up and down direction in fig. 1), thereby reducing the size of the light source 310 in the horizontal direction and further reducing the width of the chin area.
It is understood that in other embodiments, the first groove 430 may also extend upward in a direction perpendicular to the protective cover 600, such that the top surface 420 of the middle frame 400 has an upper opening. That is, the first recess 430 may have two side openings and an upper opening connected to each other, the side openings may be disposed on the inner surface 410 of the middle frame 400, the upper opening may be located on the top surface 420 of the middle frame 400, the light source 310 may be installed into the first recess 430 from the side openings, and at least a portion of the probe light emitted from the light source 310 may penetrate the protective cover 600 through the upper opening to be emitted to the finger.
In addition, the fixing manner of the light source 310 and the first groove 430 may be various, for example, the shape of the first groove 430 may match with the shape of the light source 310, so that the light source 310 may be clamped in the first groove 430.
Alternatively, referring to fig. 2 and 4, the light source 310 may be adhered in the first groove 430 with a cross-section taken in a plane parallel to the display panel, the cross-sectional area of the first groove 430 being larger than that of the light source, and a first adhesive layer 360 disposed between the inner surface of the first groove 430 and the light source 310. The first adhesive layer 360 may cover at least one surface of the light source 310, for example, as shown in fig. 2, the first adhesive layer 360 may cover 3 sides of the light source 310 except for a side facing the display panel 100, so that the fixing firmness of the light source 310 may be improved.
Optionally, a plurality of light sources 310 may be disposed in each electronic device, and the middle frame 400 is disposed with a plurality of first grooves 430 at intervals along a direction parallel to the display panel 100, in this embodiment, the plurality of first grooves 430 are arranged in a comb shape. Each first groove 430 is provided with one light source 310, the number of the detection light emitted to the fingerprint detection area can be increased by the plurality of light sources 310, the accuracy of fingerprint identification is improved, in addition, each light source 310 is arranged in one first groove 430, the area of the groove formed in the middle frame 400 can be reduced while the accuracy of fingerprint identification is improved, and the strength of the middle frame 400 is improved.
With continued reference to fig. 2 and 4, in the present embodiment, the first circuit board 320 is fixed on the middle frame 400, the light source 310 is fixed on the first circuit board 320, and the light source 310 is located on a side of the first circuit board 320 facing away from the display panel 100.
Specifically, the first circuit board 320 may be a structure capable of realizing electrical signal transmission, and optionally, the first circuit board 320 may be a flexible circuit board, so that the thickness of the first circuit board 320 may be reduced.
The light source 310 may be connected to the first circuit board 320 by soldering 311, etc., so that the light source 310 may be driven to emit a probe light through the first circuit board 320. When a plurality of light sources 310 are provided, they can be connected to the first circuit board 320, so as to form a light bar.
The first circuit board 320 may be fixed to the middle frame 400 in various ways, such as by screwing, clipping, or adhering. After the first circuit board 320 is fixed to the inner surface of the middle frame 400, the light source 310 may be embedded in the first groove 430 of the middle frame 400.
Of course, in an alternative embodiment, the first circuit board 320 may also be connected to the second circuit board 330. The second circuit board 330 may be connected to the main board 500 located in the chin area, so as to implement control, power supply, and the like of the underscreen fingerprint recognition apparatus.
Alternatively, the first circuit board 320 may be adhered to the middle frame 400 by the second adhesive layer 370. The second adhesive layer 370 may be formed by curing an adhesive, or may be a double-sided tape, etc., which is not limited herein, and the first circuit board 320 is mounted through the second adhesive layer 370, which is simple to operate and easy to implement, and may reduce the width of the chin region after the first circuit board 320 is mounted to the middle frame 400.
Further alternatively, the inner surface of the middle frame 400 facing the display panel 100 of the liquid crystal display screen is further provided with a second groove 440, and the second adhesive layer 370 is received in the second groove 440. The shape and area of the second groove 440 may be various, for example, the second groove 440 may be disposed opposite to the edge of the first circuit board 320, so as to fix the edge of the second circuit board 330 to the middle frame 400 through the second adhesive layer 370.
Alternatively, the first groove 430 is provided with the second adhesive layer 370 along both sides in a direction parallel to the display panel. Referring to fig. 2, in the manufacturing process, a first groove 440 may be formed first, and then a second groove 440 may be formed on the inner surface of the middle frame 400, the second groove 440 may extend to protrude from the left and right sides of the first groove 430, the light source 310 may be installed in the first groove 430, and the first circuit boards 320 on both sides of the light source 310 may be provided with the second adhesive layer 370 so as to be adhered to the middle frame 400. When a plurality of light sources 310 are provided, the second adhesive layer 370 may be provided on both left and right sides of each light source 310, which may increase the adhesive area of the first circuit board 320 and the middle frame 400, and improve the fixing strength.
Optionally, the second adhesive layer 370 may be connected to the first adhesive layer 360, further improving the firmness of the first circuit board 320 and the light source 310.
The second adhesive layer 370 is disposed in the second groove 440, and at least a portion of the second adhesive layer 370 may be embedded in the second groove 440, so as to reduce the width of the chin area, further, the depth of the second groove 440 in the direction perpendicular to the inner surface of the middle frame 400 is equal to the thickness of the second adhesive layer 370, so that the entire second adhesive layer 370 is just embedded in the middle frame 400, so that the surface of the fixed first circuit board 320 is smoother, and the width of the chin area is reduced.
Referring to fig. 2, in the embodiment, the first circuit board 320 is attached and fixed to the inner surface of the middle frame 400 facing the display panel 100 of the liquid crystal display, that is, after the light bar is fixed to the middle frame 400, only the thickness of the first circuit board 320 is increased, and since the thickness of the first circuit board 320 is thinner, the width of the whole chin area is smaller, and the screen occupation ratio of the electronic device is improved.
FIG. 3 is another top view of the light source of FIG. 1; referring to fig. 3, in another embodiment, the inner surface of the middle frame 400 is further provided with a third groove 450, and the first circuit board 320 is disposed in the third groove 450. The size of the third groove 450 may be set according to the area of the first circuit board 320, and at least a portion of the first circuit board 320 may be embedded in the middle frame 400 through the third groove 450, so as to further reduce the width of the chin region.
Optionally, the depth of the third groove 450 in the direction perpendicular to the inner surface of the middle frame 400 is equal to the thickness of the first circuit board 320, so that the first circuit board 320 is completely embedded in the middle frame 400, the depth of the third groove 450 can be reduced as much as possible, and the strength of the middle frame 400 can be improved.
The second groove 440 may be located on a side of the third groove 450 facing away from the display panel 100, and when the light bar is installed, the second adhesive layer 370 may be firstly bonded on the first circuit board 320, then the light source 310 is aligned with the first groove 430, and the first circuit board 320 is bonded in the third groove 450, or the second adhesive layer 370 may be firstly bonded in the second groove 440 of the middle frame 400, then the light source 310 is aligned with the first groove 430, and the first circuit board 320 is bonded in the third groove 450, so that the first middle circuit board 320 and the middle frame 400 are bonded. In addition, the area of the second groove 440 may be smaller than or equal to the thickness of the third groove 450, which is not limited herein.
On the basis of the above embodiment, the portion of the first circuit board 320 facing the light source 310 has the transmission portion 321, the transmission portion 321 is used for allowing the detection light to emit to the fingerprint detection area, and the trace of the first circuit board 320 is located at the periphery of the transmission portion 321.
The transmission portion 321 may be an opening, a transparent material layer, or may be a material layer allowing infrared light to pass through, the metal wiring of the first circuit board 320 may bypass the transmission portion 321, it may be understood that, in order to enable more infrared light to irradiate the finger, the infrared light emitted by the light source 310 has a certain inclination angle with the vertical direction, the infrared light emitted by the light source 310 may obliquely pass through the transmission portion 321 to irradiate the fingerprint detection region by setting the transmission portion 321, the amount of the infrared light irradiated to the finger is increased, and the accuracy of fingerprint identification is increased.
The present embodiment further provides an underscreen fingerprint identification apparatus, and the structure and function of the underscreen fingerprint identification apparatus are the same as those of the above embodiments, which may be referred to specifically.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (15)
1. An under-screen fingerprint identification device is characterized in that the device is suitable for electronic equipment with a liquid crystal display screen to realize under-screen optical fingerprint detection, a fingerprint detection area of the under-screen fingerprint identification device is positioned in a display area of the liquid crystal display screen, and the under-screen fingerprint identification device comprises a light source and a fingerprint sensor;
the light source is arranged below the edge area of the protective cover plate of the liquid crystal display screen, is fixed in the first groove of the middle frame of the electronic equipment and is used for emitting detection light to a finger above the liquid crystal display screen, wherein the detection light irradiates the finger above the liquid crystal display screen and forms fingerprint detection light carrying fingerprint information of the finger;
the fingerprint sensor is arranged below the backlight module of the liquid crystal display screen and used for receiving the fingerprint detection light passing through the liquid crystal display screen so as to obtain the fingerprint information of the finger.
2. The device according to claim 1, wherein the light source is disposed below the protective cover in parallel with the display panel, and an axis of the detection light emitted from the light source is inclined toward a direction approaching the fingerprint detection area.
3. The device according to claim 1, wherein the first groove is formed on an inner surface of the middle frame facing the display panel of the liquid crystal display screen and extends in a direction parallel to the protective cover.
4. The device according to claim 3, wherein a cross-section of the first groove is taken in a plane parallel to the display panel, the cross-sectional area of the first groove is larger than that of the light source, and a first adhesive layer is provided between an inner surface of the first groove and the light source.
5. The device according to claim 1, wherein the middle frame is provided with a plurality of first grooves at intervals along a direction parallel to the display panel, and each first groove is provided with one light source.
6. The device according to any one of claims 1 to 5, wherein a first circuit board is fixed to the middle frame, the light source is fixed to the first circuit board, and the light source is located on a side of the first circuit board facing away from the display panel.
7. The underscreen fingerprint identification device of claim 6 wherein said first circuit board is bonded to said middle frame by a second adhesive layer.
8. The device of claim 7, wherein the inner surface of the middle frame facing the display panel of the liquid crystal display screen is further provided with a second groove, and the second adhesive layer is accommodated in the second groove.
9. The underscreen fingerprint identification device of claim 8 wherein a depth of the second groove in a direction perpendicular to the inner surface of the middle frame is equal to a thickness of the second adhesive layer.
10. The device according to claim 9, wherein the second adhesive layer is disposed on both sides of the first groove in a direction parallel to the display panel.
11. The device of any one of claims 7-10, wherein the first circuit board is attached to an inner surface of the middle frame facing the display panel of the liquid crystal display.
12. The device of any one of claims 7 to 10, wherein the inner surface of the middle frame is further provided with a third groove, and the first circuit board is disposed in the third groove.
13. The device of claim 12, wherein a depth of the third groove in a direction perpendicular to the inner surface of the middle frame is equal to a thickness of the first circuit board.
14. The device according to claim 6, wherein a portion of the first circuit board facing the light source has a transmissive portion for allowing the probe light to be emitted to the fingerprint detection area, and the traces of the first circuit board are located at a periphery of the transmissive portion.
15. An electronic device, comprising: a middle frame, a liquid crystal display screen and the underscreen fingerprint identification device of any one of claims 1-14;
the fingerprint identification device reaches liquid crystal display with center fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922149886.7U CN211349380U (en) | 2019-12-04 | 2019-12-04 | Fingerprint recognition device under screen and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922149886.7U CN211349380U (en) | 2019-12-04 | 2019-12-04 | Fingerprint recognition device under screen and electronic equipment |
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| WO2022141607A1 (en) * | 2020-12-31 | 2022-07-07 | 深圳市汇顶科技股份有限公司 | Optical fingerprint detection apparatus and electronic device |
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