CN110598657B - Optical fingerprint identification electronic equipment under screen - Google Patents
Optical fingerprint identification electronic equipment under screen Download PDFInfo
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- CN110598657B CN110598657B CN201910881608.2A CN201910881608A CN110598657B CN 110598657 B CN110598657 B CN 110598657B CN 201910881608 A CN201910881608 A CN 201910881608A CN 110598657 B CN110598657 B CN 110598657B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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Abstract
The application provides an electronic device for optical fingerprint identification under a screen, which comprises a display panel, a light-emitting component and a sensor; the display panel comprises a display area and a non-display area; a fingerprint detection area is arranged on the display area of the display panel; the light-emitting component comprises a light source and a light guide device, wherein the light incident surface of the light guide device is arranged towards the light emergent surface of the light source, the light emergent surface of the light guide device is arranged towards the side surface of the display panel, and the light guide device is used for guiding an optical signal emitted by the light source to the side surface of the display panel; the sensor is arranged in a non-display area of the display panel and used for receiving the optical signal reflected by the finger above the fingerprint detection area and generating fingerprint information of the finger according to the received optical signal.
Description
Technical Field
The application relates to the technical field of electronics, concretely relates to optical fingerprint identification electronic equipment under screen.
Background
At present, the under-screen fingerprint recognition is mainly applied to an organic light-emitting diode (OLED) screen, and the principle is as follows: the fingerprint identification module under the OLED screen utilizes the light transmission characteristic that OLED screen itself possessed, receives the reverberation detection fingerprint that forms behind the finger reflection that OLED screen self sent. However, since the light emitting principle and the specific structure of a Liquid Crystal Display (LCD) panel are different from those of an OLED panel, the backlight module of the LCD panel has opacity. Therefore, the OLED under-screen fingerprint identification scheme is not suitable for LCD screens. Therefore, how to realize optical fingerprint identification under an LCD screen is a technical problem to be solved urgently in the field.
Content of application
The application provides an electronic equipment capable of achieving optical fingerprint identification under an LCD screen.
The application provides an electronic device for optical fingerprint identification under a screen, which comprises a display panel, a light-emitting component and a sensor; the display panel comprises a display area and a non-display area; a fingerprint detection area is arranged on the display area of the display panel; the light-emitting component comprises a light source and a light guide device, wherein the light incident surface of the light guide device is arranged towards the light emergent surface of the light source, the light emergent surface of the light guide device is arranged towards the side surface of the display panel, and the light guide device is used for guiding an optical signal emitted by the light source to the side surface of the display panel; the sensor is arranged in a non-display area of the display panel and used for receiving the optical signal reflected by the finger above the fingerprint detection area and generating fingerprint information of the finger according to the received optical signal.
The electronic equipment can realize optical fingerprint identification under the LCD screen; and the light signal emitted by the light source is guided to the side surface of the display panel through the light guide device, that is, the light signal output by the light guide device enters the display panel from the side surface of the display panel, but does not enter the display panel from the inner surface of the display panel, so that the inner surface of the display panel does not need to reserve an area of an incident light signal, the size of a non-display area of the display panel can be set to be smaller, and the ratio of the display area of the display panel can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic device for optical fingerprint identification under a screen according to a first embodiment of the present application.
FIG. 2 is a schematic cross-sectional view of the off-screen optical fingerprinting electronic equipment provided in FIG. 1 along line A-A.
Fig. 3 is a schematic partial cross-sectional view of an electronic device for optical fingerprint identification under a screen according to a second embodiment of the present application.
Fig. 4 is a schematic cross-sectional view of a width direction of a light guide device of an electronic apparatus according to a second embodiment of the present application.
Fig. 5 is a schematic cross-sectional view of a length direction of a light guide device of an electronic device according to a second embodiment of the present application.
Fig. 6 is a schematic partial cross-sectional view of an electronic device for optical fingerprint identification under a screen according to a third embodiment of the present application.
Fig. 7 is a schematic cross-sectional view of a light guide device of an electronic device according to a third embodiment of the present application.
Fig. 8 is a schematic partial cross-sectional view of an electronic device for optical fingerprint identification under a screen according to a fourth embodiment of the present application.
Fig. 9 is a schematic cross-sectional view of a light guide device of an electronic device according to a fourth embodiment of the present application.
Fig. 10 is a schematic partial cross-sectional view of an electronic device for optical fingerprint identification under a screen according to a fifth embodiment of the present application.
Fig. 11 is a schematic cross-sectional view of a light guide device of an electronic apparatus according to a fifth embodiment of the present application.
Fig. 12 is a schematic partial cross-sectional view of an electronic device for optical fingerprint identification under a screen according to a sixth embodiment of the present application.
Fig. 13 is a schematic cross-sectional view of a light guide device of an electronic apparatus according to a sixth embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The embodiments of the present application can be applied to fingerprint systems, including but not limited to optical, ultrasonic or other fingerprint identification systems and medical diagnostic products based on optical, ultrasonic or other fingerprint imaging, and the embodiments of the present application are only described by way of example, but should not be construed as limiting the embodiments of the present application, and the embodiments of the present application are also applicable to other systems using optical, ultrasonic or other imaging technologies, and the like.
The technical solution of the embodiment of the present application may perform other biometric identification, for example, living body identification, besides fingerprint identification, which is not limited in the embodiment of the present application.
The technical scheme of the embodiment of the application can be applied to various electronic devices, and more particularly, can be applied to electronic devices with display screens. For example, portable or mobile computing devices such as smart phones, notebook computers, tablet computers, and game devices, and other electronic devices such as electronic databases, automobiles, and Automatic Teller Machines (ATMs), but the present application is not limited thereto.
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.
It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the underscreen fingerprint module shown in the drawings are only exemplary and should not be construed as limiting the present application in any way.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an electronic device according to a first embodiment of the present disclosure, and fig. 2 is a schematic cross-sectional diagram of an electronic device according to the first embodiment of the present disclosure. The electronic device 100 includes a display panel 20, a light emitting element 40, and a sensor 50.
The display panel 20 includes a display area 201 and a non-display area 202. A fingerprint detection area 203 is disposed on the display area 201 of the display panel 20. The light emitting assembly 40 includes a light source 41 and a light guide 42. The light incident surface 421 of the light guide device 42 faces the light source 41, the light emitting surface 422 faces the side surface 23 of the display panel 20, and the light guide device 42 is configured to guide the optical signal emitted by the light source 41 to the side surface 23 of the display panel 20. The sensor 50 is disposed in the non-display area 202 of the display panel 20, and the sensor 50 is configured to receive the light signal reflected by the finger above the fingerprint detection area 203 and generate fingerprint information of the finger according to the received light signal.
The optical signal emitted by the light source 41 is incident from the light incident surface 421 of the light guide device 42, then obliquely emitted from the light emitting surface 422 of the light guide device 42 to the side surface 23 of the display panel 20, then reaches the fingerprint detection region 203 via the display panel 20, is reflected by the finger above the fingerprint detection region 203, and then is received by the sensor 50 via the display panel 20, and the sensor 50 generates the fingerprint information of the finger.
It can be understood that if the light guide device 42 is not provided, the light signal of the light source 41 needs to be emitted to the fingerprint detection area 203 through the inner surface 22 of the display panel 20, so that the inner surface 22 of the display panel 20 needs to reserve an area for the incident light signal, which inevitably occupies the non-display area 202 of the display panel 20, i.e. the size of the non-display area 202 of the display panel 20 needs to be set larger for simultaneously entering and receiving the light signal, which inevitably makes the display area 201 of the display panel 20 relatively smaller and the occupation ratio of the display area 201 of the display panel 20 smaller; in the present application, the light guide device 42 guides the light signal emitted by the light source 41 to the side 23 of the display panel 20, that is, the light signal output by the light guide device 42 enters the display panel 20 from the side 23 of the display panel 20, but does not enter the display panel 20 from the inner surface 22 of the display panel 20, so that the inner surface 22 of the display panel 20 does not need to reserve an area for incident light signals, and thus the size of the non-display area 202 of the display panel 20 can be set smaller, and the ratio of the display area 201 of the display panel 20 can be improved.
The Display panel 20 may be a Liquid Crystal Display (LCD) panel or other passive light emitting Display. It is understood that the display panel 20 has a certain transmittance for the optical signal, so that the optical signal can penetrate the display panel 20 for signal transmission.
In an embodiment, the non-display area 202 may be disposed on one side of the display area 201, for example, the non-display area 202 is disposed below the display area 201. In another embodiment, the non-display area 202 may also be semi-enclosed in the display area 201, a gap is formed in the display area 201, and the non-display area 202 is semi-enclosed in the gap of the display area 201; among other things, this arrangement is advantageous for increasing the ratio of the display area 201 in the display panel 20. In this embodiment, as shown in fig. 1, the non-display area 202 is disposed around the display area 201. In other embodiments, the positional relationship between the display area 201 and the non-display area 202 may not be limited to the above embodiments.
The fingerprint detection area 203 may be a fixed position of the display area 201 on the display panel 20, or may extend to the entire display area 201 of the liquid crystal panel, which is not specifically limited in this embodiment of the application. Correspondingly, the number of the sensors 50 may be one, or may be multiple, and the multiple sensors may be used to receive light signals reflected by fingers in different fingerprint detection areas 203 on the display panel 20.
In an embodiment, the electronic device 100 further includes a backlight module 30. The backlight module 30 is stacked with the display panel 20; the backlight module 30 is disposed on the inner surface 22 of the display panel 20.
The orthographic projection of the light-emitting surface of the backlight module 30 on the inner surface 22 covers the display area 201; the light emitting surface of the backlight module 30 may be formed in the display area 201 and the non-display area 202, or may be formed only in the display area 201. The size of the orthographic projection of the light emitting surface of the backlight module 30 on the inner surface 22 may be the same as the size of the orthographic projection of the whole backlight module 30 on the inner surface 22, or may be smaller than the size of the orthographic projection of the whole backlight module 30 on the inner surface 22; for example, the backlight module 30 is a side-in type light source backlight module, and a light source is disposed on a side surface thereof, so that a size of an orthographic projection of the entire backlight module 30 on the inner surface 22 is larger than a size of an orthographic projection of a light-emitting surface of the backlight module 30 on the inner surface 22, and for example, the backlight module 30 is a straight-in type light source backlight module, and a light source is disposed on a back surface thereof, so that a size of the orthographic projection of the entire backlight module 30 on the inner surface 22 is equal to a size of the orthographic projection of the light-emitting surface of the backlight module 30 on the inner surface 22, which, of course, is not limited thereto.
In an embodiment, the electronic device 100 further comprises a housing 10. The housing 10 encloses a receiving space 101. The display panel 20, the backlight module 30, the light emitting assembly 40 and the sensor 50 are all accommodated in the housing 10.
The light source 41 is disposed on a side of the backlight module 30 away from the display panel 20. The orthographic projection of the light source 41 on the surface of the inner surface 22 may fall between the display panel 20 and the housing 10, the non-display region 202 of the display panel 20, the display region 201 of the display panel 20, or both the foregoing regions. That is, the settable position of the light source 41 in the present application is wide and is not necessarily limited to the position corresponding to the non-display region 202 of the display panel 20. The light signal emitted by the light source 41 may be a visible light signal, or may be an invisible light signal. The invisible light signal can be an infrared light signal or an ultraviolet light signal. The infrared light signal has strong penetrating power and is invisible, and the display image is not influenced, so that the infrared light signal can be used as an optimal light signal. The number of the light sources 41 may be one or more; for example, a plurality of infrared LED lamps may be provided.
In an embodiment, the electronic device 100 may further include a middle frame, and the light source 41 is disposed on the middle frame of the electronic device 100, for example, on a surface of the middle frame or embedded in a groove or a through hole on the middle frame.
In another embodiment, the electronic device 100 may further include a main board, and the light source 41 is disposed on the main board of the electronic device 100, for example, attached to a surface of the main board or embedded in a groove or a notch on the main board.
The light guide device 42 includes a light incident surface 421 and a light emitting surface 422; the light incident surface 421 of the light guide device 42 faces the light source 41, and the light emitting surface 422 faces the side surface 23 of the display panel 20.
In one embodiment, as shown in fig. 2, a gap 11 is formed between the side 23 of the display panel 20 and the housing 10. The end portion where the light incident surface 421 of the light guide device 42 is defined as a bottom end 4202, the end portion where the light emitting surface 422 of the light guide device 42 is defined as a top end 4201, and the top end 4201 of the light guide device 42 is accommodated in the gap 11.
The light emitting surface 422 of the light guide device 42 is a surface close to or connected to the top surface 4201, and the light emitting surface 422 may be circular, oval, rectangular, or the like. The light emitting surface 422 of the light guide device 42 may be parallel to the side surface 23 or form an inclined angle with the side surface 23. In an embodiment, for example, an inclined angle is formed between the light emitting surface 422 of the light guide device 42 and the side surface 23, and the inclined angle may be greater than 0 degree to less than 90 degrees, or greater than 0 degree to less than 60 degrees, or greater than 30 degrees to less than 45 degrees; the specific inclination angle may be determined according to the position of the side sensing surface 501 of the sensor 50 and/or the fingerprint detection area 203 on the display panel 20; by arranging the light emitting surface 422 to be inclined, the light emitted from the light emitting surface 422 can be incident obliquely relative to the side surface 23, so that relatively fewer light sources 41 correspond to a relatively larger fingerprint detection area 203, and the fingerprint identification efficiency is improved. In another embodiment, for example, the light-emitting surface 422 of the light guide 42 is parallel to the side surface 23, and the end surface of the top end 4201 of the light guide 42 is disposed obliquely to the side surface 23 to reflect the light incident on the end surface of the top end 4201 to the light-emitting surface 422. It can be understood that the light emitting direction of the optical signal on the light emitting surface 422 of the light guide device 42 may be the same as the orientation of the light emitting surface 422, or may form an included angle with the orientation of the light emitting surface 422; the light emitting direction and the orientation of the light emitting surface 422 are set according to the position of the fingerprint detection area 203.
The light incident surface 421 and the light emitting surface 422 may be parallel, perpendicular or inclined.
For example, in an embodiment, the emitting direction of the light source 41 is perpendicular to the inner surface 22, the light incident surface of the light guide device 42 is disposed right above the light source 41, and the light incident surface 421 of the light guide device 42 is perpendicular to the incident direction, so that more and more light signals of the light source 41 are incident on the light incident surface 421 of the light guide device 42.
For another example, in another embodiment, the emitting direction of the light source 41 is parallel to the inner surface 22, the light incident surface of the light guide device 42 is disposed at one side of the light source 41, and the light incident surface 421 of the light guide device 42 is perpendicular to the incident direction; the arrangement of the light source 41 and the light guide device 42 in parallel with the exit direction of the light source 41 and the inner surface 22 may be more flexible, for example, when the distance between the light source 41 and the side surface 23 is short and the light guide device cannot be arranged for transmitting an optical signal, the light source 41 may be arranged at a position far away from the housing 10, and the light incident surface of the light guide device 42 is arranged at one side of the light source 41, that is, the space between the light source 41 and the side surface 23 is elongated, so that the arrangement of the light guide device 42 is facilitated.
For another example, in another embodiment, the emitting direction of the light source 41 is inclined to the inner surface 22, the light incident surface of the light guide device 42 is disposed obliquely above the light source 41, and the light incident surface 421 of the light guide device 42 is perpendicular to the incident direction, so that more and more light signals of the light source 41 are incident on the light incident surface 421 of the light guide device 42; in addition, the light emitting direction of the light source 41 and the inner surface 22 are inclined, so that the light source 41 and the light guide device 42 can be more flexibly arranged, for example, when the distance between the light source 41 and the side surface 23 is short and the light guide device cannot be arranged for transmitting an optical signal, the light source 41 can be arranged at a position far away from the housing 10, and the light incident surface of the light guide device 42 is arranged obliquely above the light source 41, that is, the space between the light source 41 and the side surface 23 is elongated, so that the light guide device 42 is convenient to arrange.
The light guide device 42 may be a light guide plate, a light guide pipe, a light guide film, or the like.
The shape of the light guide device 42 can be set as required; in one embodiment, referring to fig. 4 and 5, a width of an end surface of a top end 4201 of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 is defined as W1, a length of the end surface in the direction parallel to the extending direction of the display panel 20 is defined as L1, a width of an end surface of a bottom end 4202 of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 is defined as W2, and a length of the end surface in the direction parallel to the extending direction of the display panel 20 is defined as L2, wherein L1 is greater than W1.
Preferably, in one embodiment, W1 is less than W2 and L1 is greater than L2; since the width of the gap 11 is generally very small, the width of the end surface of the top end 4201 of the light guide device 42 is relatively small in order to accommodate the top end 4201 of the light guide device 42 in the gap 11, and in this case, in order to secure the light output amount, it is necessary to elongate the length of the end surface of the top end 4201 of the light guide device 42 in the direction parallel to the extending direction of the display panel 20, that is, the light output amount of the light guide device 42 may be made larger by setting W1 smaller than W2 and L1 larger than L2.
In one embodiment, the light guide device 42 has a gradually decreasing width and a gradually increasing length in a direction parallel to the extending direction of the display panel 20.
In another embodiment, W1 may also be equal to W2 and L1 may also be equal to L2.
The length of the light-emitting surface 422 of the light guide 42 in the direction parallel to the extending direction of the display panel 20 is less than or equal to the length of the end surface 4202 of the light guide 42 in the direction parallel to the extending direction of the display panel 20, and is preferably equal to the length of the light-emitting surface 422 as long as possible so as to emit more optical signals; the width of the light emitting surface 422 is equal to the thickness of the display panel 20, so that more optical signals can be incident on the display panel 20, and the utilization rate of the light source 41 is improved.
A line connecting the center of the end surface of the top end 4201 of the light guide 42 and the center of the end surface of the bottom end 4202 of the light guide 42 may be perpendicular to the inner surface 22 or may be inclined to the inner surface 22; therefore, the light source 41 may be provided directly below the gap 11, or may be provided obliquely below the gap 11; the light guide 42 may be flexibly arranged according to the space within the electronic device 100.
The outer surface of the light guide device 42 may be a plane or a curved surface; the surface of the light guide device 42 is a reflection surface to guide the optical signal to the light emitting surface 422 in a predetermined direction; the reflecting surface is provided with a microstructure.
The sensor 50 is disposed on the inner surface 22 of the non-display area 202 of the display panel 20. The sensor 50 may be a CMOS optic or a CCD optic or the like. The sensor 50 may be in close contact with the inner surface 22 or may be formed with a gap. The sensor 50 includes a sensing side 501. The side sensing surface 501 of the sensor 50 may be parallel to, perpendicular to, or at an oblique angle with respect to the inner surface 22. In an embodiment, for example, an inclination angle may be formed between the sensing side surface 501 of the sensor 50 and the inner surface 22, the inclination angle may be greater than 0 degree to less than 90 degrees, or greater than 0 degree to less than 60 degrees, or greater than 30 degrees to less than 45 degrees, and a specific inclination angle may be determined according to the positions of the sensing side surface 501 of the sensor 50 and the emitting surface 221 of the light source 41 and/or the position of the fingerprint detection region 203 on the display panel 20, wherein the sensing side surface 501 of the sensor 50 is obliquely disposed, so that an area of the sensing side surface 501 receiving the light signal is relatively large, and the fingerprint identification efficiency can be improved by corresponding to the relatively large fingerprint detection region 203.
In one embodiment, the orthographic projection of the sensor 50 on the inner surface 22 is spaced from the orthographic projection of the backlight module 30 on the inner surface 22; in another embodiment, the orthographic projection of the sensor 50 on the inner surface 22 is seamlessly connected with the orthographic projection of the backlight module 30 on the inner surface 22, so that the occupied area of the backlight module 30 in the electronic device 100 is larger, and the display area of the electronic device 100 is increased.
The thickness of the sensor 50 may be greater than, equal to, or less than the thickness of the backlight module 30; preferably, the thickness of the sensor 50 is comparable to the thickness of the backlight module 30, so as to optimize the space utilization of the electronic device 100.
Because the sensor 50 is located below the display panel 20, not below the backlight module 30, the optical signal reflected by the finger and received by the sensor 50 does not need to pass through the backlight module 30 and is not shielded by the backlight module 30, and therefore, the sensor 50 can receive the optical signal reflected by the finger and perform fingerprint identification, that is, can realize optical fingerprint identification under the LCD screen; in addition, the sensor 50 is disposed below the non-display area 202 of the display panel 20, and does not affect the display effect of the screen.
Optionally, a light condensing element, a light converting element, and the like may be further disposed on the light path of the sensor 50 receiving the light signal.
In one embodiment, as shown in fig. 2, the electronic device 100 may further include a cover plate 60 laminated on the outer surface 21 of the display panel 20. The cover plate 60 includes a light-transmitting region corresponding to the display region 201 of the display panel 20. The material of the cover plate 60 includes, but is not limited to, a light-transmitting material such as glass, plastic, or sapphire. The cover 60 may further include a non-transmission region, which may correspond to the non-display region 202 of the display panel 20. The opaque region may be formed by applying or printing a black or white light-shielding ink layer on the inner surface (the surface facing the display panel 20) of the cover 60. Wherein the fingerprint recognition may be actually performed on the cover sheet 60 over the fingerprint recognition area 203 of the display panel 20 or on the surface of a protective layer covering the cover sheet 60.
The following describes a specific structure of the electronic device 100 in a specific embodiment.
In a second embodiment, as shown in fig. 3 to 5, the electronic device 100 includes a housing 10, a display panel 20, a backlight module 30, a light emitting element 40, a sensor 50, and a middle frame 70. The housing 10 encloses a receiving space 101. The display panel 20, the backlight module 30, the light emitting assembly 40, the sensor 50 and the middle frame 70 are all accommodated in the housing 10. The display panel 20 includes a display area 201 and a non-display area 202. A fingerprint detection area 203 is disposed on the display area 201 of the display panel 20. The display panel 20 includes a display surface 21, an inner surface 22 opposite to the display surface 21, and a side surface 23 connecting the display surface and the inner surface 22, and the backlight module 30 is disposed on the inner surface 22 of the display panel 20. The middle frame 70 is disposed farther from the display panel 20 than the backlight module 30, and the middle frame 70 and the backlight module 30 are disposed at intervals. The sensor 50 is disposed on the inner surface 22 of the non-display area 202 of the display panel 20. A gap 11 is formed between the side 23 of the display panel 20 and the housing 10. The light emitting assembly 40 includes a light source 41 and a light guide 42.
In this embodiment, the light source 41 is disposed on a surface of the middle frame 70 near the backlight module 30. The orthographic projection of the light source 41 on the surface of the inner surface 22 falls on the gap 11 and the non-display area 202, and the orthographic projection of the light source 41 on the surface of the inner surface 22 is overlapped with the orthographic projection of the sensor 50 on the surface of the inner surface 22, that is, the light source 41 is partially positioned right below the sensor 50. The light emitting direction of the light source 41 is perpendicular to the inner surface 22. In other embodiments, the orthographic projection of the light source 41 on the surface of the inner surface 22 may also fall only on the gap 11, so that the volume occupied by the light source 41 is smaller; the light emitting direction of the light source 41 may be inclined to the inner surface 22.
The top end 4201 where the light emitting surface 422 of the light guide device 42 is located is accommodated in the gap 11, and the light incident surface 421 of the light guide device 42 is disposed toward the light source 41 and is perpendicular to the light emitting direction of the light source 41.
A width of an end surface defining the top end 4201 of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 is W1, a length along the direction parallel to the extending direction of the display panel 20 is L1, a width of an end surface defining the bottom end 4202 of the light guide device 42 along the direction parallel to the extending direction of the display panel 20 is W2, and a length along the direction parallel to the extending direction of the display panel 20 is L2, where L1 is greater than W1.
In the present embodiment, W1 is smaller than W2, L1 is larger than L2, and the light guide device 42 has a gradually decreasing width and a gradually increasing length in a direction parallel to the extending direction of the display panel 20. For example, as shown in fig. 4, the cross-sectional shape of the light guide 42 along the length direction is an isosceles inverted trapezoid, the cross-sectional shape of the light guide 42 along the width direction is a right-angled trapezoid, and one right-angled side of the right-angled trapezoid is disposed adjacent to the housing 10; of course, in other embodiments, the shape of the light guide 42 may be other shapes.
The light emitting surface 422 of the light guide device 42 faces the side surface 23 of the display panel 20 and is inclined to the side surface 23; the light guide device 42 may be provided with an inclined plane corresponding to the light exit surface 422, so that the light signal can be reflected by the inclined plane and then exit from the light exit surface 422 of the light guide device 42 to the side surface 23, and more light signals can reach the fingerprint detection area 203.
In this embodiment, although the orthographic projection of the light source 41 on the surface of the inner surface 22 is overlapped with the orthographic projection of the sensor 50 on the surface of the inner surface 22, the light source 41 is disposed below the sensor 50 so as not to interfere with the sensor 50; in addition, although the light signal emitted by the light source 41 cannot directly reach the fingerprint detection area 203 of the display panel 20 due to the shielding of the sensor 50, because the light guide device 42 is provided, the light signal emitted by the light source 41 can be guided to the side surface of the display panel 20 through the light guide device 42 and then reach the fingerprint detection area 203, and meanwhile, the display panel 20 does not need to enlarge the non-display area 202 to allow the light signal of the light source 41 to pass through, so that the non-display area 202 of the display panel 20 can be made smaller, and the occupation ratio of the display area 201 is larger; further, the shape and size of the light guide 42 of the present embodiment enable the tip 4201 of the light guide 42 to be accommodated in the gap 11, while increasing the amount of light output from the light guide 42.
It can be understood that a groove or a through hole may be further formed on the middle frame 70, and the light source 41 may be further accommodated in the groove or the through hole of the middle frame 70, so as to save the space inside the electronic device 100, and further increase the height of the light guide device 42 as much as possible, so that the light guide device 42 has higher light emitting efficiency and more uniform light emission.
In a third embodiment, as shown in fig. 6 and 7, the electronic device 100 includes a housing 10, a display panel 20, a backlight module 30, a light emitting element 40, a sensor 50, and a main board 80. The housing 10 encloses a receiving space 101. The display panel 20, the backlight module 30, the light emitting assembly 40, the sensor 50 and the main board 80 are all accommodated in the housing 10. The display panel 20 includes a display area 201 and a non-display area 202. A fingerprint detection area 203 is disposed on the display area 201 of the display panel 20. The display panel 20 includes a display surface 21, an inner surface 22 opposite to the display surface 21, and a side surface 23 connecting the display surface and the inner surface 22, and the backlight module 30 is disposed on the inner surface 22 of the display panel 20. The sensor 50 is disposed on the inner surface 22 of the non-display area 202 of the display panel 20. A gap 11 is formed between the side 23 of the display panel 20 and the housing 10. The light emitting assembly 40 includes a light source 41 and a light guide 42.
In this embodiment, the main board 80 is located on a side of the backlight module 30 away from the display panel 20 and spaced from the backlight module 30, a groove 81 is formed on the main board 80, and a vertical projection of the groove 81 on the inner surface 22 is located in the display area 201. The light source 41 is accommodated in the groove 81 of the main board 80. The orthographic projection of the light source 41 on the face of the inner surface 22 falls within the display area 201. The light emitting direction of the light source 41 is perpendicular to the inner surface 22. In other embodiments, the light emitting direction of the light source 41 may be inclined to the inner surface 22; the orthographic projection of the light source 41 on the display panel 20 may also fall within the non-display area 202; the light source 41 may also be attached to the surface of the main board 80 or disposed in a notch formed in the side of the main board 80.
The end where the light emitting surface 422 of the light guide device 42 is located is accommodated in the gap 11, and the light incident surface 421 of the light guide device 42 faces the light source 41 and is perpendicular to the light emitting direction of the light source 41.
A width of an end surface defining the top end 4201 of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 is W1, a length along the direction parallel to the extending direction of the display panel 20 is L1, a width of an end surface defining the bottom end 4202 of the light guide device 42 along the direction parallel to the extending direction of the display panel 20 is W2, and a length along the direction parallel to the extending direction of the display panel 20 is L2, where L1 is greater than W1.
In the present embodiment, W1 is smaller than W2, L1 is larger than L2, and the width of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 gradually decreases and the length thereof in a direction parallel to the extending direction of the display panel 20 gradually increases. For example, as shown in fig. 5, the cross-sectional shape of the light guide device 42 along the length direction is an isosceles inverted trapezoid, and the cross-sectional shape of the light guide device 42 along the width direction is a regular general trapezoid; of course, in other embodiments, the shape of the light guide 42 may be other shapes.
The light emitting surface 422 of the light guide device 42 faces the side surface 23 of the display panel 20 and is inclined to the side surface 23; in this embodiment, the light guide device 42 is provided with an inclined plane corresponding to the light emitting surface 422, so that the light signal can be reflected by the inclined plane and then emitted from the light emitting surface 422 of the light guide device 42 to the side surface 23, and more light signals can reach the fingerprint detection area 203.
In this embodiment, the light source 41 is formed in a groove of the main board 80 so as not to interfere with the sensor 50; in addition, although the light source 41 is formed at a position corresponding to the display area 201, the emitted light signal cannot directly reach the fingerprint detection area 203 of the display panel 20 due to the shielding of the sensor 50, because the light guide device 42 is provided, the light signal emitted by the light source 41 can be guided to the side surface of the display panel 20 through the light guide device 42 and then reach the fingerprint detection area 203, and meanwhile, the display panel 20 does not need to enlarge the non-display area 202 to allow the light signal of the light source 41 to pass through, so that the non-display area 202 of the display panel 20 can be made smaller, and the occupation ratio of the display area 201 is larger; further, the shape and size of the light guide 42 of the present embodiment enable the tip 4201 of the light guide 42 to be accommodated in the gap 11, while increasing the amount of light output from the light guide 42.
In a fourth embodiment, as shown in fig. 8 and 9, the electronic device 100 includes a housing 10, a display panel 20, a backlight module 30, a light emitting element 40, a sensor 50, and a main board 80. The housing 10 encloses a receiving space 101. The display panel 20, the backlight module 30, the light emitting assembly 40, the sensor 50 and the main board 80 are all accommodated in the housing 10. The display panel 20 includes a display area 201 and a non-display area 202. A fingerprint detection area 203 is disposed on the display area 201 of the display panel 20. The display panel 20 includes a display surface 21, an inner surface 22 opposite to the display surface 21, and a side surface 23 connecting the display surface and the inner surface 22, and the backlight module 30 is disposed on the inner surface 22 of the display panel 20. The main board 80 is located on a side of the backlight module 30 away from the display panel 20 and spaced from the backlight module 30, a groove 81 is formed on the main board 80, and a vertical projection of the groove 81 on the inner surface 22 is located in the display area 201. The sensor 50 is disposed on the inner surface 22 of the non-display area 202 of the display panel 20. A gap 11 is formed between the side 23 of the display panel 20 and the housing 10. The light emitting assembly 40 includes a light source 41 and a light guide 42.
The light source 41 is accommodated in the groove 81 of the main board 80. The orthographic projection of the light source 41 on the face of the inner surface 22 falls within the display area 201. The light emitting direction of the light source 41 is perpendicular to the inner surface 22. In other embodiments, the light emitting direction of the light source 41 may be inclined to the inner surface 22; the orthographic projection of the light source 41 on the display panel 20 may also fall within the non-display area 202; the light source 41 may also be attached to the surface of the main board 80 or disposed in a notch formed in the side of the main board 80.
The end where the light emitting surface 422 of the light guide device 42 is located is accommodated in the gap 11, and the light incident surface 421 of the light guide device 42 faces the light source 41 and is perpendicular to the light emitting direction of the light source 41.
A width of an end surface defining the top end 4201 of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 is W1, a length along the direction parallel to the extending direction of the display panel 20 is L1, a width of an end surface defining the bottom end 4202 of the light guide device 42 along the direction parallel to the extending direction of the display panel 20 is W2, and a length along the direction parallel to the extending direction of the display panel 20 is L2, where L1 is greater than W1.
In this embodiment, W1 is smaller than W2, L1 is larger than L2, and the width of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 is reduced in a stepwise manner, and the length in the direction parallel to the extending direction of the display panel 20 is increased in a stepwise manner. For example, as shown in fig. 5, the cross-sectional shape of the light guide device 42 along the longitudinal direction is a three-step inverted-convex shape, and the cross-sectional shape of the light guide device 42 along the width direction is a three-fold bent shape, so that the light guide device 42 includes a first bending portion 427, a second bending portion 428, and a third bending portion 429, the extending directions of the first bending portion 427 and the third bending portion 429 are the same, and the second bending portion 428 is connected between the first bending portion 427 and the third bending portion 429; in this embodiment, the extending direction of the first bending portion 427 and the third bending portion 429 is perpendicular to the extending direction of the display panel 20, and the second bending portion 428 is connected between the first bending portion 427 and the third bending portion 429 in an inclined manner; in a direction parallel to the extending direction of the display panel 20, the width of the first bending part 427 is greater than the width of the second bending part 428, the width of the second bending part 428 is greater than the width of the third bending part 429, the length of the first bending part 427 is less than the width of the second bending part 428, and the width of the second bending part 428 is less than the width of the third bending part 429; of course, in other embodiments, the arrangement of the three bending portions may not be limited to the above embodiments, for example, the extending direction of the first bending portion 427 and the third bending portion 429 may be inclined to the extending direction of the display panel 20, the second bending portion 428 may be parallel to the extending direction of the display panel 20, and the like; in addition, the light guide device 42 may further include more bending portions; in other embodiments, the light guide 42 may have other shapes.
In one embodiment, the outer side of the adjacent bending part is provided with a slope, and the slope can deflect the incident optical signal to transmit in the light guide device 42.
The light emitting surface 422 of the light guide device 42 faces the side surface 23 of the display panel 20 and is parallel to the side surface 23; the light guide device 42 may be provided with an inclined plane corresponding to the light exit surface 422, so that the light signal can be reflected by the inclined plane and then exit from the light exit surface 422 of the light guide device 42 to the side surface 23, and more light signals can reach the fingerprint detection area 203.
In this embodiment, the light source 41 is formed in a groove of the main board 80 so as not to interfere with the sensor 50; in addition, although the light source 41 is formed at a position corresponding to the display area 201, the emitted light signal cannot directly reach the fingerprint detection area 203 of the display panel 20 due to the shielding of the sensor 50, because the light guide device 42 is provided, the light signal emitted by the light source 41 can be guided to the side surface of the display panel 20 through the light guide device 42 and then reach the fingerprint detection area 203, and meanwhile, the display panel 20 does not need to enlarge the non-display area 202 to allow the light signal of the light source 41 to pass through, so that the non-display area 202 of the display panel 20 can be made smaller, and the occupation ratio of the display area 201 is larger; further, the shape and size of the light guide device 42 of the present embodiment enable the tip 4201 of the light guide device 42 to be accommodated in the gap 11, while increasing the light output of the light guide device 42; in addition, the light guide device 42 having a plurality of bending portions can adjust the bending angle and position of the bending portion according to the internal condition of the electronic device 100, thereby making better use of the internal space of the electronic device 100.
In a fifth embodiment, as shown in fig. 10 and 11, the electronic device 100 includes a housing 10, a display panel 20, a backlight module 30, a light emitting element 40, a sensor 50, and a main board 80. The housing 10 encloses a receiving space 101. The display panel 20, the backlight module 30, the light emitting assembly 40, the sensor 50 and the main board 80 are all accommodated in the housing 10. The display panel 20 includes a display area 201 and a non-display area 202. A fingerprint detection area 203 is disposed on the display area 201 of the display panel 20. The display panel 20 includes a display surface 21, an inner surface 22 opposite to the display surface 21, and a side surface 23 connecting the display surface and the inner surface 22, and the backlight module 30 is disposed on the inner surface 22 of the display panel 20. The main board 80 is located on a side of the backlight module 30 away from the display panel 20 and spaced apart from the backlight module 30. The sensor 50 is disposed on the inner surface 22 of the non-display area 202 of the display panel 20. A gap 11 is formed between the side 23 of the display panel 20 and the housing 10. The light emitting assembly 40 includes a light source 41 and a light guide 42.
A notch 82 is formed in a side of the main board 80 close to the housing 10, and the notch 82 is recessed inward from the surface of the main board 80 facing the inner surface 22 and from the side of the main board 80. The light source 41 is accommodated in the notch 82 of the main board 80. The orthographic projection of the light source 41 on the face of the inner surface 22 falls within the display area 201. The light emitting direction of the light source 41 is parallel to the inner surface 22. In other embodiments, the light emitting direction of the light source 41 may be perpendicular to or inclined from the inner surface 22; the orthographic projection of the light source 41 on the display panel 20 may also fall within the non-display area 202; the light source 41 may also be attached to the surface of the main board 80 or disposed in a groove on the surface of the main board 80.
The end where the light emitting surface 422 of the light guide device 42 is located is accommodated in the gap 11, and the light incident surface 421 of the light guide device 42 faces the light source 41 and is perpendicular to the light emitting direction of the light source 41.
A width of an end surface defining the top end 4201 of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 is W1, a length along the direction parallel to the extending direction of the display panel 20 is L1, a width of an end surface defining the bottom end 4202 of the light guide device 42 along the direction parallel to the extending direction of the display panel 20 is W2, and a length along the direction parallel to the extending direction of the display panel 20 is L2, where L1 is greater than W1.
In this embodiment, W1 is smaller than W2, L1 is larger than L2, and the width of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 is reduced in a stepwise manner, and the length in the direction parallel to the extending direction of the display panel 20 is increased in a stepwise manner. For example, as shown in fig. 6, the cross-sectional shape of the light guide device 42 along the length direction is a funnel shape, and the cross-sectional shape of the light guide device 42 along the width direction is an L shape, so that the light guide device 42 includes a first bending portion 427 and a second bending portion 428, the extending direction of the first bending portion 427 is parallel to the extending direction of the display panel 20, the extending direction of the second bending portion 428 is perpendicular to the extending direction of the display panel 20, and the second bending portion 428 is disposed adjacent to the housing 10; in a direction parallel to the extending direction of the display panel 20, the width of the second bending part 428 is smaller than the width of the first bending part 427, and the length of the second bending part 428 is smaller than the length of the first bending part 427; of course, in other embodiments, the arrangement of the two bending portions may not be limited to the above-described embodiments; the shape of the light guide 42 may also be other shapes.
In this embodiment, the outer side of the adjacent bending part is provided with an inclined surface, and the inclined surface can deflect the incident optical signal to transmit in the light guide device 42.
The light emitting surface 422 of the light guide device 42 faces the side surface 23 of the display panel 20 and is parallel to the side surface 23; the light guide device 42 may be provided with an inclined plane corresponding to the light exit surface 422, so that the light signal can be reflected by the inclined plane and then exit from the light exit surface 422 of the light guide device 42 to the side surface 23, and more light signals can reach the fingerprint detection area 203.
In this embodiment, the light source 41 is formed in the notch 82 of the main board 80, so as not to interfere with the sensor 50; in addition, although the light source 41 is formed at a position corresponding to the display area 201, the emitted light signal cannot directly reach the fingerprint detection area 203 of the display panel 20 due to the shielding of the sensor 50, because the light guide device 42 is provided, the light signal emitted by the light source 41 can be guided to the side surface of the display panel 20 through the light guide device 42 and then reach the fingerprint detection area 203, and meanwhile, the display panel 20 does not need to enlarge the non-display area 202 to allow the light signal of the light source 41 to pass through, so that the non-display area 202 of the display panel 20 can be made smaller, and the occupation ratio of the display area 201 is larger; further, the shape and size of the light guide device 42 of the present embodiment enable the tip 4201 of the light guide device 42 to be accommodated in the gap 11, while increasing the light output of the light guide device 42; in addition, the L-shaped horizontal segment of the light guide device 42 is accommodated in the notch of the motherboard 80, and the vertical segment is arranged close to the housing 10, so that the occupied space is very small, and the light and thin configuration of the electronic device 100 is facilitated.
The present application further provides a sixth embodiment, which is similar to the second embodiment, except that, as shown in fig. 12 and 13, a top end 4201 of the light guide device 42 has a rectangular parallelepiped shape, that is, after a width of the light guide device 42 in a direction parallel to the extending direction of the display panel 20 extends to a surface where the inner surface of the display panel 20 is located, the width and the length of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 are both kept unchanged and are not reduced or increased; because the size of the gap 11 is not large, compared to the second embodiment in which the width of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 is gradually reduced, the light guide device 42 with a larger volume is accommodated in the gap 11, which is favorable for more optical signals to be transmitted to the top end 4201 of the light guide device 42 and enter the display panel 20.
That is, in the present embodiment, W1 is smaller than W2, L1 is larger than L2, and when the width of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 is gradually reduced to the vicinity of the inner surface of the display panel 20, the width is maintained constant, and the length of the light guide device 42 in the direction parallel to the extending direction of the display panel 20 may be gradually increased. The cross section of the light guide device 42 along the length direction is an isosceles inverted trapezoid, and the cross section of the light guide device 42 along the width direction is a trapezoid shape with an elongated square shape overlapped. The light emitting surface 422 of the light guide 42 faces the side surface 23 of the display panel 20 and is parallel to the side surface 23.
It is to be understood that the design of the light guide 42 in the sixth embodiment described above may also be applied to the third embodiment.
It can be understood that, because the structures of the electronic devices are different, some electronic devices may not have a middle frame, and therefore, the light source 41 of the second embodiment may also be disposed on the main board; of course, in some electronic devices, the light source 41 of the third, fourth and fifth embodiments may also be disposed on the middle frame; the above embodiments are not intended to be limiting.
It is understood that the number of the light sources 41 in the above embodiments may be one or more.
It is to be understood that the parts of the second and fifth embodiments that are not described above can be referred to the description of the first embodiment.
While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.
Claims (16)
1. An electronic device for optical fingerprint identification under a screen is characterized by comprising a display panel, a light-emitting component and a sensor; the display panel comprises a display area and a non-display area; a fingerprint detection area is arranged on the display area of the display panel; the display panel comprises a display surface, an inner surface opposite to the display surface and a side surface connecting the display surface and the inner surface; the light-emitting component comprises a light source and a light guide device, wherein the light incident surface of the light guide device is arranged towards the light emergent surface of the light source, the light emergent surface of the light guide device is arranged towards the side surface of the display panel, and the light guide device is used for guiding an optical signal emitted by the light source to the side surface of the display panel; the sensor is arranged in a non-display area of the display panel and used for receiving the optical signal reflected by the finger above the fingerprint detection area and generating fingerprint information of the finger according to the received optical signal.
2. The off-screen optical fingerprint recognition electronic device according to claim 1, wherein an end face defining a top end where a light exit surface of the light guide device is located has a width W1 and a length L1; defining the width of the end face of the bottom end of the light incident surface of the light guide device to be W2 and the length to be L2; wherein L1 is greater than W1, W1 is less than W2 and L1 is greater than L2.
3. The off-screen optical fingerprint recognition electronic device according to claim 2, wherein the light guide device has a width gradually decreasing and a length gradually increasing in a direction parallel to an extending direction of the display panel from a bottom end of the light guide device to a top end of the light guide device.
4. The off-screen optical fingerprint recognition electronic device according to claim 3, wherein a cross-sectional shape of the light guide device along a length direction is an isosceles inverted trapezoid; the cross section of the light guide device along the width direction is in a shape of a right trapezoid; the orthographic projection of the light source on the display panel at least partially falls outside the display panel.
5. The off-screen optical fingerprint recognition electronic device according to claim 3, wherein a cross-sectional shape of the light guide device along a length direction is an isosceles inverted trapezoid; the cross section of the light guide device along the width direction is in a common regular trapezoid shape.
6. The off-screen optical fingerprint recognition electronic device according to claim 2, wherein a cross-sectional shape of the light guide device along a length direction is a multi-step inverted-convex shape; the cross-sectional shape of the light guide device along the width direction is a bent shape.
7. The off-screen optical fingerprint recognition electronic device according to claim 6, wherein a cross-sectional shape of the light guide device along a length direction is an inverted-convex shape of three steps; the cross section of the light guide device along the width direction is in a three-fold bent shape; the light guide device comprises a first bending part, a second bending part and a third bending part, the extending directions of the first bending part and the third bending part are the same, and the second bending part is connected between the first bending part and the third bending part; the end part of the first bending part, which is far away from the second bending part, faces the light emitting direction of the light source.
8. The off-screen optical fingerprint identification electronic device of claim 7, wherein the extending direction of the first bending portion and the third bending portion is perpendicular to the extending direction of the display panel, and the second bending portion is obliquely connected between the first bending portion and the third bending portion.
9. The off-screen optical fingerprint recognition electronic device according to claim 6, wherein a cross-sectional shape of the light guide device in a length direction is an inverted convex shape; the cross-sectional shape of the light guide device along the width direction is L-shaped.
10. The electronic device for optical fingerprint identification under screen of claim 9, wherein the light guiding device comprises a first bending portion and a second bending portion, an extending direction of the first bending portion is parallel to an extending direction of the display panel, an extending direction of the second bending portion is perpendicular to the extending direction of the display panel, and the second bending portion is disposed closer to the display panel than the first bending portion; the end part of the first bending part, which is far away from the second bending part, faces the light emitting direction of the light source.
11. The off-screen optical fingerprint identification electronic device of claim 10, further comprising a motherboard, wherein the motherboard defines a notch recessed from a side of the motherboard, and the light source is received in the notch on the motherboard; the light emitting direction of the light source is perpendicular to the extending direction of the display panel.
12. The off-screen optical fingerprint recognition electronic device according to claim 2, wherein the light guide device gradually decreases in width in a direction parallel to the extending direction of the display panel from a bottom end of the light guide device to a top end of the light guide device, and remains unchanged after reaching a surface where an inner surface of the display panel is located; from the bottom end of the light guide device to the top end of the light guide device, the length of the light guide device in the direction parallel to the extending direction of the display panel is gradually increased.
13. The off-screen optical fingerprint identification electronic device according to any one of claims 1 to 12, wherein an orthographic projection of the light source on the display panel falls outside the display panel, and/or falls within the non-display area of the display panel, and/or falls within the display area of the display panel.
14. The electronic device for optical fingerprint identification under screen of any one of claims 1 to 12, further comprising a middle frame, wherein the light source is disposed on a surface of the middle frame, or embedded in a groove or a through hole on the middle frame.
15. The off-screen optical fingerprint identification electronic device according to any one of claims 1 to 12, wherein the electronic device further comprises a main board, and the light source is disposed on a surface of the main board or embedded in a groove or a notch on the main board.
16. The underscreen optical fingerprint recognition electronic device of any one of claims 1-12, further comprising a housing, wherein the display panel is housed within the housing, and wherein a gap is formed between a side surface of the display panel and the housing; the top end of the light-emitting surface of the light guide device is accommodated in the gap between the display panel and the shell.
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| CN111881761B (en) * | 2020-06-30 | 2022-09-23 | 厦门天马微电子有限公司 | Display module and display device |
| CN111929765A (en) * | 2020-08-18 | 2020-11-13 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and light guide structure thereof |
| CN112269499B (en) * | 2020-11-17 | 2022-08-05 | 武汉华星光电技术有限公司 | Display panel, display screen and electronic equipment for identifying fingerprints under display screen |
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