CN114660615A - Electronic device - Google Patents

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Publication number
CN114660615A
CN114660615A CN202210298950.1A CN202210298950A CN114660615A CN 114660615 A CN114660615 A CN 114660615A CN 202210298950 A CN202210298950 A CN 202210298950A CN 114660615 A CN114660615 A CN 114660615A
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China
Prior art keywords
light
layer
hole
electronic device
metal
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CN202210298950.1A
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Chinese (zh)
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谭栋源
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN202210298950.1A priority Critical patent/CN114660615A/en
Publication of CN114660615A publication Critical patent/CN114660615A/en
Priority to PCT/CN2023/083658 priority patent/WO2023179762A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/40—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light specially adapted for use with infrared light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application discloses an electronic device, which belongs to the technical field of communication equipment and comprises a display screen, a bearing piece, an infrared sensor and a light absorption layer; the display screen sets up in the one side that holds carrier, and infrared sensor sets up in the opposite side that holds carrier, and the light-absorbing layer sets up between display screen and the carrier. By means of the electronic equipment, the problem that an infrared sensor of the electronic equipment is poor in detection accuracy can be solved.

Description

Electronic device
Technical Field
The application belongs to the technical field of communication equipment, and particularly relates to electronic equipment.
Background
Along with the enhancement of the demand of high screen occupation ratio of the display area of the display screen of the electronic equipment, the infrared sensor of the electronic equipment can be placed below the display screen, and the display function can still be reserved in the area of the display screen opposite to the infrared sensor, so that the screen occupation ratio of the display area is improved. The existing electronic equipment comprises a display screen, a bearing piece and an infrared sensor, wherein the display screen and the infrared sensor are respectively arranged on two sides of the bearing piece. In the infrared sensor working process, after a part of infrared emission light emitted by the infrared sensor meets the display screen, the part of infrared emission light is finally received by the infrared sensor through refraction and reflection of the display screen and the bearing piece, but the part of infrared emission light does not reach a measured object, does not come from reflected light of the measured object, belongs to bottom noise light, and can influence the detection accuracy of the infrared sensor.
In order to ensure the detection accuracy of the infrared sensor, the light energy received by the infrared sensor needs to be removed from the background noise calibration value, so as to obtain the real reflected light energy of the measured object.
In the related art, the bottom noise calibration value is determined in the design process of the electronic equipment, but the assembly stress is released after the electronic equipment is assembled, and a user has drop stress and a severe temperature environment in the process of using the electronic equipment, so that a spatial structure among the infrared sensor, the bearing part and the display screen generates micro-variation, the sensitivity of bottom noise light to the structure is high, the change of the structure micro-variation on the bottom noise light has a large influence, and the generated bottom noise light is unstable.
Disclosure of Invention
The embodiment of the application aims to provide electronic equipment, and the problem that detection accuracy of an infrared sensor in the electronic equipment is poor can be solved.
The embodiment of the application provides electronic equipment which comprises a display screen, a bearing piece, an infrared sensor and a light absorption layer;
the display screen set up in hold one side of carrier, infrared sensor set up in hold the opposite side of carrier, the light-absorbing layer set up in the display screen with hold between the carrier.
In this application embodiment, electronic equipment's display screen and hold and set up the light-absorbing layer between the piece, can absorb display screen and hold the produced infrared light of piece refraction and reflection for infrared light that infrared sensor received almost is infrared light that infrared sensor sent and arrives the measured object, reflects back through the measured object. The produced infrared light of display screen and carrier refraction and reflection if received by infrared sensor, can influence the accuracy that detects, and this part of infrared light can be absorbed to the light absorption layer in this application embodiment to can avoid the influence of this part of infrared light to infrared sensor's detection accuracy, with the detection accuracy that improves infrared sensor.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device in an embodiment of the present application;
fig. 2 is a schematic top view of a portion of an electronic device in an embodiment of the present application.
FIG. 3 is a schematic view of the structure of a light absorbing layer in an embodiment of the present application;
FIG. 4 is a schematic view of a light absorbing layer according to another embodiment of the present application;
FIG. 5 is a side view of a portion of FIG. 4;
FIG. 6 is a schematic view showing the arrangement position of a light absorbing layer in the embodiment of the present application;
description of reference numerals:
100-light absorption layer, 110-second light outlet hole, 120-second light inlet hole, 130-first metal layer, 140-first medium layer, 150-second metal layer, 160-second medium layer, 170-metal bottom plate, 180-first subunit, 190-second subunit,
200-a display screen,
300-bearing part, 310-first light outlet, 320-first light inlet,
400-infrared sensor, 410-infrared emitter, 420-infrared receiver,
500-main board,
600-measured object.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The electronic device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
As shown in fig. 1 to 6, an embodiment of the present application provides an electronic device including a display 200, a carrier 300, an infrared sensor 400, and a light absorbing layer 100.
The display screen 200 is a display component of the electronic device, and is used for outputting text, images, videos and the like to a user and receiving operation input of the user. The display screen 200 may include a light emitting layer, a glass cover plate, a circuit layer, and the like.
The carrier 300 is a main body member of the electronic device, and is used for supporting the display screen 200, the display screen 200 is disposed on one side of the carrier 300, and the infrared sensor 400 is disposed on the other side of the carrier 300. Alternatively, the carrier 300 may be a separately provided structural member, or the carrier 300 may also be a middle frame of the electronic device.
It is understood that the electronic apparatus has an installation space for installing other functional devices. The functional devices specifically include a main board 500 of the electronic device, a battery, the infrared sensor 400, and the like. The mounting space may be defined by the carrier 300, or may be defined by the carrier 300 and the housing of the electronic device.
The carrier 300 has a plate-shaped structure made of metal to carry the display panel 200, and specifically, the carrier may be made of aluminum alloy, magnesium alloy, or other materials. The carrier 300 may also be in the form of a combination of a metal plate and an injection molded part, and is not particularly limited herein.
The infrared sensor 400 is used to detect the object 600 to be measured outside the display screen 200, and for example, the distance from the object 600 to the display screen 200 may be determined to control the electronic device according to the distance. The infrared sensor 400 may include an infrared emitting piece 410 and an infrared receiving piece 420, the infrared emitting piece 410 for emitting infrared light, and the infrared receiving piece 420 for receiving infrared light. For example, the infrared emitting element 410 may be an infrared emitting diode, and the infrared receiving element 420 may be an infrared receiving diode. After the infrared light emitted from the infrared emitting element 410 reaches the object 600 to be measured, the infrared light is reflected by the object 600 to be measured and then received by the infrared receiving element 420. The infrared sensor 400 can determine the distance from the object 600 to the display screen 200 by comparing the received infrared light with the emitted infrared light.
The light absorbing layer 100 is disposed between the display panel 200 and the carrier 300 to absorb infrared light between the display panel 200 and the carrier 300.
In the embodiment of the present application, the light absorbing layer 100 is disposed between the display screen 200 and the carrier 300, and the light absorbing layer 100 can absorb the infrared light generated by reflection and refraction of the display screen 200 and the carrier 300, so as to eliminate the detection noise. The infrared light received by the infrared sensor 400 is almost completely reflected by the object 600 to be detected, so that the infrared light generated by reflection and refraction of the display screen 200 and the bearing member 300 is prevented from being received by the infrared sensor 400, and the detection accuracy of the infrared sensor 400 is improved.
In the embodiment of the present application, the orthographic projection of the light absorbing layer 100 on the plane of the carrier 300 is within the range of the orthographic projection of the infrared sensor 400 on the plane of the carrier 300. That is, the light absorbing layer 100 is disposed only in the region corresponding to the infrared sensor 400 between the display panel 200 and the carrier 300, and the light absorbing layer 100 is not disposed in the entire lower portion of the display panel 200, so that the installation area of the light absorbing layer 100 can be reduced as much as possible, and the material can be saved. Of course, the orthographic projection of the light absorbing layer 100 on the plane of the carrier 300 may coincide with the orthographic projection edge of the infrared sensor 400 on the plane of the carrier 300. It is understood that the orthographic projection of the light absorbing layer 100 on the plane of the supporting member 300 can exceed the orthographic projection of the infrared sensor 400 on the plane of the supporting member 300, which is considered by the light absorbing capability and the cost of the light absorbing layer 100.
The carrier 300 of the electronic device is provided with a first light outlet 310 and a first light inlet 320. The infrared sensor 400 is disposed at the other side of the carrier 300. The infrared sensor 400 may include an infrared emitting element 410 and an infrared receiving element 420, the infrared emitting element 410 being opposite to the first light outlet hole 310, and the infrared receiving element 420 being opposite to the first light inlet hole 320. The infrared ray emitted from the infrared emitting element 410 can be irradiated to the object 600 to be measured through the first light emitting hole 310, and after being reflected by the object 600 to be measured, can be absorbed by the infrared receiving element 420 through the first light entering hole 320. The light absorbing layer 100 is disposed around the first light outlet hole 310 and the first light inlet hole 320. By this arrangement, the light absorbing layer 100 can absorb the infrared light generated by refraction and reflection of the display 200 and the carrier 300, and the infrared light emitted from the infrared emitting element 410 can be irradiated to the object 600 to be measured through the first light outlet 310 without affecting the infrared light, and can be absorbed by the infrared receiving element 420 through the first light inlet 320 after being reflected by the object 600 to be measured.
The light absorbing layer 100 is provided with a second light emitting hole 110 and a second light entering hole 120, the second light emitting hole 110 is disposed opposite to the first light emitting hole 310, and the second light entering hole 120 is disposed opposite to the first light entering hole 320. The light absorbing layer 100 does not affect the infrared ray emitted from the infrared emitting element 410 and can irradiate the object 600 to be measured through the first light emitting hole 310, and after being reflected by the object 600 to be measured, the infrared ray can be absorbed by the infrared receiving element 420 through the first light entering hole 320.
In the embodiment of the present application, optionally, the diameter of the first light exit hole 310 is D1, and the edge of the second light exit hole 110 is away from the center of the first light exit hole 310 by a first width W1 relative to the edge of the first light exit hole 310. W1/D1 is 1/5-1/3, for example, 1/5, 1/4, 1/3, etc.
Optionally, the diameter of the first light entering hole 320 is D2, the edge of the second light entering hole 120 is set back from the edge of the first light entering hole 320 by a second width W2 in a direction away from the center of the first light entering hole 320, and the range of W2/D2 is 1/5 to 1/3, for example, it may be 1/5, 1/4, 1/3, etc. Of course, D1 and W1, D2 and W2 may satisfy the above conditions at the same time.
The edge of the second light emitting hole 110 is away from the center of the first light emitting hole 310 by a certain distance relative to the edge of the first light emitting hole 310, and the edge of the second light entering hole 120 is away from the center of the first light entering hole 320 by a certain distance relative to the edge of the first light entering hole 320, so that the light absorbing layer 100 does not influence the infrared light to irradiate the object 600 through the first light emitting hole 310, and does not influence the infrared light reflected by the object 600 to be measured to be absorbed by the infrared receiving element 420 through the first light entering hole 320.
For example, the diameter of the first light exit hole 310 is 4mm, the edge of the second light exit hole 110 is set back from the edge of the first light exit hole 310 by a first width 1mm in a direction away from the center of the first light exit hole 310, and then W1/D1 is 1/4.
The diameter of the first light entrance hole 320 is 4mm, the edge of the second light entrance hole 120 is set to be 1mm away from the center of the first light entrance hole 320 by a second width relative to the edge of the first light entrance hole 320, and at this time, W2/D2 is 1/4.
The distance between the edge of the second light exit hole 110 and the edge of the second light entrance hole 120 is L3, and the range of L3 is 3mm to 5 mm. For example, L3 may be 4 mm.
In the embodiment of the present application, the light absorbing layer 100 may be one or more of a super-structural material layer, a black coating film, a black light absorbing sheet, or a black adhesive tape. In the case where the light absorbing layer 100 is one of an ultra-structure material layer, a black coating film, a black light absorbing sheet, or a black adhesive tape, the one of the ultra-structure material layer, the black coating film, the black light absorbing sheet, or the black adhesive tape is interposed between the carrier 300 and the display panel 200. In the case where the light absorbing layer 100 is a plurality of the metamaterial layer, the black coating film, the black light absorbing sheet, or the black tape, the plurality of the metamaterial layer, the black coating film, the black light absorbing sheet, or the black tape may be stacked or spliced to be interposed between the carrier 300 and the display panel 200.
Of course, the light absorbing layer 100 may be another type of light absorbing layer 100, and the embodiment of the present application does not limit the type of the light absorbing layer 100. The light absorbing layer 100 may be formed on the carrier 300 by plating, and is integrally designed with the carrier 300.
In the embodiment of the present application, in the case that the light absorbing layer 100 is a super-structural material layer, the full absorption of the infrared light between the display screen and the bearing member can be realized.
Alternatively, the diameter of the first light outlet 310 is D1, the distance between the edge of the light absorbing layer 100 and the edge of the second light outlet 110 is L1, and L1/D1 ≧ 1/5, which can be 1/5, 1/4, or the like, for example. Further, L1/D1 < 1 makes it possible to reduce the area of the light absorbing layer 100 as much as possible.
Optionally, the diameter of the first light inlet hole 320 is D2, the distance between the edge of the light absorbing layer 100 and the edge of the second light inlet hole 120 is L2, and L2/D2 ≧ 1/5, for example, 1/5, 1/4, etc. Further, L2/D2 < 1 makes it possible to reduce the area of the light absorbing layer 100 as much as possible. Of course, the above conditions can be satisfied by L1, D1, L2 and D2.
The edge of the light absorbing layer 100 has a certain distance from the edge of the second light outlet hole 110. That is, the edge of the light absorbing layer 100 is expanded by a certain distance in a direction away from the center of the second light outlet 110 with respect to the edge of the second light outlet 110, and a certain distance is provided between the edge of the light absorbing layer 100 and the edge of the second light inlet 120. That is, the edge of the light absorbing layer 100 is extended by a certain distance relative to the edge of the second light inlet 120 in a direction away from the center of the second light inlet 120, so that the light absorbing layer 100 can absorb all the infrared light generated by refraction and reflection of the display screen 200 and the carrier 300 as much as possible.
For example, the diameter of the first light exit hole 310 is 4mm, the distance between the edge of the light absorbing layer 100 and the edge of the second light exit hole 110 is 0.8mm, and at this time, L1/D1 is 1/5.
The diameter of the first light incident hole 320 is 4mm, the distance between the edge of the light absorbing layer 100 and the edge of the second light incident hole 120 is 0.8mm, and at this time, L2/D2 is 1/5.
The above dimensions satisfy the light absorption requirement because the light absorption layer 100 is made of a super-structure material layer that almost completely absorbs the infrared light generated by refraction and reflection between the display panel 200 and the supporting member 300.
In the case where the light absorbing layer 100 is a metamaterial layer, the light absorbing layer 100 includes a first metal layer 130, a first dielectric layer 140, and a second metal layer 150. The first dielectric layer 140 is disposed between the first metal layer 130 and the second metal layer 150, the first metal layer 130 is close to the display panel 200, and the second metal layer 150 is close to the carrier 300. In the structure, the surface of the first metal layer 130 and the surface of the second metal layer 150 can be excited by photons to perform surface plasmon resonance, antisymmetric current distribution is formed on the surfaces of the metal layers at the resonance wavelength, magnetic dipole resonance is generated in the first medium layer 140, the dissipation of a light field in the structure can be obviously improved by remarkable electromagnetic coupling, and further remarkable light absorption enhancement is realized at the resonance wavelength, so that infrared light generated by refraction and reflection of the display screen 200 and the bearing member 300 can be completely absorbed as much as possible.
Further, the light absorbing layer 100 further includes a second dielectric layer 160 and a metal base plate 170, the second dielectric layer 160 is disposed between the second metal layer 150 and the metal base plate 170, and the metal base plate 170 is disposed on a side of the second dielectric layer 160 close to the carrier 300. The number of layers of the metal layer and the dielectric layer is increased by the second dielectric layer 160 and the metal base plate 170, so that the absorption rate of infrared rays is higher.
Alternatively, the metal material of the first metal layer 130, the second metal layer 150 and the metal bottom plate can be gold (Au), and the conductivity is 4.56x10^ 7S/m. The dielectric material of the first dielectric layer 140 and the second dielectric layer 160 may be germanium (Ge) and have a relative refractive index of 4.
In the embodiment of the present application, the first metal layer 130, the first dielectric layer 140, the second metal layer 150, and the second dielectric layer 160 are stacked, and a plurality of first sub-units 180 are formed on the metal base plate 170. The plurality of first sub-units 180 are all in a bar shape in the first extending direction of the metal base plate 170. The plurality of first sub-units 180 are arranged at intervals in a second extending direction of the metal base plate 170, and the first extending direction is perpendicular to the second extending direction.
When infrared light enters the first subunit 180, the first subunit 180 generates a space electric field, the space electric field forms vortex current, so that a strong space magnetic field is induced, the induced magnetic field and the incident photomagnetic field generate strong interaction, magnetic excitation element resonance is generated, electromagnetic absorption is realized, the overall absorption rate can be more than 90%, and infrared light generated by the emission and refraction of the display screen 200 of the electronic device can be almost completely absorbed.
In the embodiment of the present application, within a predetermined range of the metal base plate 170, along the second extending direction, the widths of the plurality of first sub-units 180 are sequentially decreased. Absorption of broad spectrum infrared light, for example, from 800nm to 1200nm, can be achieved.
In the embodiment of the present application, when an electromagnetic wave (infrared light) enters the light absorption layer 100 of the metamaterial layer, the absorptance + reflectance + transmittance thereof is 1, where a (ω), R (ω), and T (ω) are respectively absorptance, reflectance, and transmittance, and ω is an angular frequency of the electromagnetic wave, there is an absorption rate, reflectance, and transmittance thereof
A(ω)+R(ω)+T(ω)＝1
In electromagnetic simulation calculation, the reflection coefficient is S11Transmission coefficient of S21If the thickness of the light absorbing layer 100 of the metamaterial layer is d, S21Material dependent complex impedance z ═ z1+iz2And complex refractive index n ═ n1+in2When the vacuum wave vector k is set to ω/c and c is the vacuum light velocity, the following means
R(ω)＝|S11|2
T(ω)＝|S21|2
Figure BDA0003564442670000091
Figure BDA0003564442670000092
To realize complete light absorption, the light absorption layer 100 of the metamaterial layer and the spatial impedance are required to realize impedance matching (the two impedances are equal), that is, the structure of the light absorption layer 100 of the metamaterial layer is reasonably designed to approximately satisfy z1＝1,z20 and n1＝1,n2+ ∞sothat R (ω) and T (ω) are 0, i.e., a (ω) ═ 1.
Figure BDA0003564442670000093
Figure BDA0003564442670000094
Therefore, the size, number, material and other parameters of the light absorption layer 100 of the metamaterial layer can be obtained through simulation calculation according to the requirement and the formula: light absorption layer 100 includes a plurality of extinction units, every extinction unit includes 6 first subunits 180, in the extinction unit, along second extending direction, distance between the center of adjacent first subunits 180 is 1.5um, 6 first subunits 180's width is 0.241um in proper order, 0.233um, 0.225um, 0.218um, 0.206um, 0.201um, first metal layer 130, first dielectric layer 140, the thickness of second metal layer 150 and second dielectric layer 160 is 0.05um in proper order, 0.65um, 0.05um, 0.2 um. The light absorption layer 100 can realize the absorption of infrared rays with a wide spectrum of 800 nm-1200 nm, has an overall absorption rate of more than 90 percent, and can almost completely absorb infrared rays generated by the emission and refraction of the display screen 200 of the electronic equipment.
In the embodiment of the present application, when an electromagnetic wave (infrared ray) is incident on the surface of the resonance unit, a multiple reflection interference model is formed as shown in fig. 6.
When an electromagnetic wave is incident to the interface between the display panel 200 and the first metal layer 130 at an arbitrary angle α, the incident electromagnetic wave forms a transmitted wave and a reflected wave, the reflection coefficient and the transmission coefficient of which are respectively
Figure BDA0003564442670000101
And
Figure BDA0003564442670000102
when the transmitted wave reaches the second metal layer 150 through the first dielectric layer 140, the transmitted wave has a propagation phase β and then undergoes total reflection;
the electromagnetic wave continues to penetrate the dielectric layer to reach the first metal layer 130, at which stage the propagation phase β also exists. Then the electromagnetic wave is circularly transmitted and transmitted at two interfaces, and finally the total reflected wave is equivalent to the superposition of a plurality of reflected waves on the interfaces, i.e. the electromagnetic wave is transmitted and transmitted
Figure BDA0003564442670000103
S12、S21Represents the transmission parameter, S, of the first metal layer 13011、S22Representing the reflection of the first metal layer 130Parameter, S23Beta is the propagation phase in the first dielectric layer 140, which is the reflection parameter of the second metal layer 150. When the absorption rate is neglected, the total reflectance S is required to realize the complete absorption of the infrared ray by the light absorption layer 100 of the metamaterial layer when the reflectance + the absorption rate + the transmittance is 111total＝0。
Parameters such as the size, the number, the material and the like of the light absorption layer 100 of the metamaterial layer can be obtained through simulation calculation according to the requirement and the formula: the first metal layer 130 includes a plurality of cross structures or a mesh structure. Of course, the first metal layer 130 may also include a plurality of other shaped structures. The plurality of cross-shaped structures or grid structures are of the same size and a plurality of resonant cells of the same size may be integrated to absorb infrared light of a narrow spectrum, for example, to absorb infrared light of 950 nm. If the absorption of the wide-spectrum infrared light is required, a plurality of resonance units with different sizes can be integrated.
In the embodiment of the present application, the electronic device includes a display 200, a carrier 300, an infrared sensor 400, and a light absorbing layer 100; the display screen 200 is disposed at one side of the carrier 300, the infrared sensor 400 is disposed at the other side of the carrier 300, and the light absorbing layer 100 is disposed between the display screen 200 and the carrier 300.
The orthographic projection of the light absorbing layer 100 on the plane of the carrier 300 is within the range of the orthographic projection of the infrared sensor 400 on the plane of the carrier 300. The carrier 300 is provided with a first light outlet 310 and a first light inlet 320, and the light absorbing layer 100 is disposed around the first light outlet 310 and the first light inlet 320; the light absorbing layer 100 is provided with a second light emitting hole 110 and a second light entering hole 120, the second light emitting hole 110 is disposed opposite to the first light emitting hole 310, and the second light entering hole 120 is disposed opposite to the first light entering hole 320.
The infrared sensor 400 may include an infrared emitting element 410 and an infrared receiving element 420, the infrared emitting element 410 being opposite to the first light outlet hole 310, and the infrared receiving element 420 being opposite to the first light inlet hole 320.
The light absorption layer 100 is arranged between the display screen 200 and the bearing member 300, and can absorb infrared light generated by refraction and reflection of the display screen 200 and the bearing member 300, so that the infrared light received by the infrared sensor 400 almost completely reaches the object 600 to be measured through the infrared light emitted by the infrared sensor 400, and is reflected back through the object 600 to be measured, thereby avoiding the influence of the infrared light generated by refraction and reflection of the display screen 200 and the bearing member 300 on the detection accuracy of the infrared sensor 400, and improving the detection accuracy of the infrared sensor 400.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. An electronic device, comprising a display (200), a carrier (300), an infrared sensor (400), and a light absorbing layer (100);
the display screen (200) set up in one side of carrying thing (300), infrared sensor (400) set up in the opposite side of carrying thing (300), light-absorbing layer (100) set up in display screen (200) with carry between the thing (300).
2. The electronic device according to claim 1, characterized in that an orthographic projection of the light-absorbing layer (100) on a plane of the carrier (300) is located within a range of an orthographic projection of the infrared sensor (400) on a plane of the carrier (300).
3. The electronic device of claim 1, wherein the carrier (300) is provided with a first light exit hole (310) and a first light entrance hole (320), the light absorbing layer (100) being arranged around the first light exit hole (310) and the first light entrance hole (320);
the light absorbing layer (100) is provided with a second light outlet hole (110) and a second light inlet hole (120), the second light outlet hole (110) is opposite to the first light outlet hole (310), and the second light inlet hole (120) is opposite to the first light inlet hole (320).
4. The electronic device of claim 3, wherein the diameter of the first light exit hole (310) is D1, the edge of the second light exit hole (110) is set back from the edge of the first light exit hole (310) by a first width W1 in a direction away from the center of the first light exit hole (310), and the range of W1/D1 is 1/5-1/3; and/or
The diameter of the first light entering hole (320) is D2, the edge of the second light entering hole (120) is opposite to the edge of the first light entering hole (320) and is away from the center of the first light entering hole (320) by a second width W2, and the range of W2/D2 is 1/5-1/3.
5. The electronic device of claim 1, wherein the light absorbing layer (100) is one or more of a layer of a metamaterial, a black plated film, a black light absorbing sheet, or a black tape.
6. The electronic device of claim 3, wherein the light absorbing layer (100) is a super-structure material layer, the diameter of the first light outlet hole (310) is D1, the distance between the edge of the light absorbing layer (100) and the second light outlet hole (110) is L1, and L1/D1 is not less than 1/5; and/or
The diameter of the first light inlet hole (320) is D2, the distance between the edge of the light absorbing layer (100) and the edge of the second light inlet hole (120) is L2, and L2/D2 is not less than 1/5.
7. The electronic device of claim 5, wherein the light absorbing layer (100) is a metamaterial layer, the light absorbing layer (100) comprising a first metal layer (130), a first dielectric layer (140), and a second metal layer (150), the first dielectric layer (140) disposed between the first metal layer (130) and the second metal layer (150), the first metal layer (130) proximate to the display (200), the second metal layer (150) proximate to the carrier (300).
8. The electronic device of claim 7, wherein the light absorbing layer (100) further comprises a second dielectric layer (160) and a metal backplane (170), the second dielectric layer (160) being disposed between the second metal layer (150) and the metal backplane (170), the metal backplane (170) being disposed on a side of the second dielectric layer (160) proximate to the carrier (300).
9. The electronic device according to claim 8, wherein the first metal layer (130), the first dielectric layer (140), the second metal layer (150) and the second dielectric layer (160) are stacked, and a plurality of first sub-units (180) are formed on the metal base plate (170), wherein the plurality of first sub-units (180) are all in a strip shape in a first extending direction of the metal base plate (170), the plurality of first sub-units (180) are arranged at intervals in a second extending direction of the metal base plate (170), and the first extending direction is perpendicular to the second extending direction.
10. The electronic device according to claim 9, wherein the widths of the plurality of first subunits (180) decrease sequentially along the second extending direction within a preset range of the metal base plate (170).
11. The electronic device of claim 10, wherein said light absorbing layer (100) comprises a plurality of light absorbing units, each of said light absorbing units comprising 6 of said first subunits (180);
in the light absorption unit, along the second extension direction, the distance between the centers of the adjacent first subunits (180) is 1.5 um;
6 the width of first subunit (180) is 0.241um, 0.233um, 0.225um, 0.218um, 0.206um, 0.201um in proper order, first metal level (130) first dielectric layer (140), second metal level (150) and the thickness of second dielectric layer (160) is 0.05um, 0.65um, 0.05um, 0.2um in proper order.
12. The electronic device of claim 7, wherein the first metal layer (130) comprises a cross-shaped structure or a grid structure.
CN202210298950.1A 2022-03-25 2022-03-25 Electronic device Pending CN114660615A (en)

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CN107945660A (en) * 2017-11-22 2018-04-20 广东欧珀移动通信有限公司 Display screen component and electronic equipment
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CN108932024A (en) * 2018-06-26 2018-12-04 维沃移动通信有限公司 A kind of mobile terminal
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CN114660615A (en) * 2022-03-25 2022-06-24 维沃移动通信有限公司 Electronic device

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