CN110458131A - Sensing system and electronic equipment under a kind of screen - Google Patents
Sensing system and electronic equipment under a kind of screen Download PDFInfo
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- CN110458131A CN110458131A CN201910761114.0A CN201910761114A CN110458131A CN 110458131 A CN110458131 A CN 110458131A CN 201910761114 A CN201910761114 A CN 201910761114A CN 110458131 A CN110458131 A CN 110458131A
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Classifications
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- G—PHYSICS
- 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
Abstract
This application provides sensing systems under a kind of screen, for being sensed to target object projective structure light light and floodlight light.Sensing system includes display device and the transmitting unit below display device under the screen.The transmitting unit is used for emitting structural light light.The backlight module includes diffusion sheet.The diffusion sheet includes: first electrode, second electrode and diffusion layer.The diffusion layer is arranged between the first electrode and second electrode, the first electrode and the second electrode diffusion layer described in face are used to form the first electric field through the part of structure light light, and the diffusion layer, which is located at the part in the first electric field, to be converted at least between pellucidity and scattering state with the variation of electric field strength.The structure light light that the transmitting unit issues can be projected through the part diffusion layer of pellucidity, and it is that floodlight light is projected that the structure light light that the transmitting unit issues, which passes through the part diffusion layer scattering in scattering state,.
Description
Technical field
The application belongs to sensing system and electronic equipment under optical technical field more particularly to a kind of screen.
Background technique
Existing three-dimensional (Three Dimension, 3D) sensing mould group usually requires that floodlight transmitter and knot is respectively set
Structure optical transmitting set.The floodlight transmitter and structured light device pass through two different optical paths and project floodlight light and knot respectively
3D sensing is carried out on structure light light a to target object.Moreover, the floodlight transmitter and structured light device need to occupy electricity
The screen display area of sub- equipment, to affect the screen accounting of the electronic equipment using three-dimensional sensing mould group.
Summary of the invention
In order to solve the above technical problems, the application provides sensing system and electronic equipment under the new-type screen of one kind.
The application embodiment provides sensing system under a kind of screen, for target object projective structure light light and floodlight
Light is sensed.Sensing system includes: display device under the screen, and for showing picture, the display device is for showing
The region of picture is defined as display area, not showing that the region of picture is defined as non-display area in the display device.Institute
State the backlight module that display device includes display panel He is arranged in below display panel.Sensing system further wraps under the screen
It includes:
Transmitting unit, in the range of setting below the backlight module with the display area face, for issuing
Structure light light；
Wherein, the backlight module includes diffusion sheet, and the diffusion sheet includes first electrode, second electrode and diffusion layer,
The diffusion layer is arranged between the first electrode and second electrode, for penetrating the structure light light on the diffusion layer
Part be defined as the first detecting part, the first electrode is used for and second electrode in the position of first detecting part forms the
The electric field strength of one electric field, first electric field can be independently adjustable, and the first detecting part of the diffusion layer can be with described
The electric field strength variation of first electric field is converted at least between pellucidity and scattering state, and first detecting part is in transparent
When state, the structure light light that the transmitting unit issues can be projected through the first detecting part in pellucidity,
When first detecting part is in scattering state, the structure light light that the transmitting unit issues passes through first in scattering state
Detecting part scattering is that floodlight light is projected.
In some embodiments, the part that the diffusion layer is in pellucidity the mist degree of institute's transmitted light is less than or
Equal to 10%, the part that the diffusion sheet is in scattering state is greater than or equal to 70% to the mist degree of institute's transmitted light.
In some embodiments, the diffusion layer is selected from formal polymer dispersed liquid crystal layer, trans- polymer dispersion liquid
Any one in crystal layer, polymer network liquid crystal layer and cholesteric crystal layer.
In some embodiments, the diffusion layer is formal polymer dispersed liquid crystal layer, the formal polymer dispersion
Liquid crystal layer is when the voltage difference absolute value of locating electric field is zero or is less than or equal to preset first voltage threshold value in scattering
State, the formal polymer dispersed liquid crystal layer are greater than or equal to preset second voltage in the voltage difference absolute value of locating electric field
Pellucidity is in when threshold value.
In some embodiments, the value range of the first voltage threshold value is 0 volt to 1 volt, the second voltage threshold
The value range of value is 5 volts to 100 volts.
In some embodiments, the transmitting unit includes light source and diffraction optical element, and the light source is for issuing
Original ray, the diffraction optical element are used to the original ray being modulated to structure light light.
In some embodiments, the light source is selected from two pole of vertical cavity surface emitting laser, light emitting diode and laser
In pipe any one and combinations thereof.
In some embodiments, the original ray be infrared or near infrared light, wave-length coverage be 750 nanometers extremely
2000 nanometers.
In some embodiments, the structure light light is pattern light light.
In some embodiments, the diffusion layer is located in display area, and non-sensing portion is defined on the diffusion layer,
The non-sensing portion is not needed through the light for executing sensing.
In some embodiments, the light for executing sensing includes structure light light and returns via target object
The light returned.
In some embodiments, the position with the first detecting part face is arranged in the first electrode and second electrode
Place is set, opposite sides of the non-sensing portion along light transmission direction is not provided with electrode.
In some embodiments, the first electrode include the first conductive region and the second conductive region, described first
First detecting part described in conductive region face is configured, and non-sensing portion described in the second conductive region face is configured,
Insulation gap is arranged between first conductive region and the second conductive region, and the second electrode is used for and the first conductive region
First electric field is formed, the second electrode is used to form the second electric field with the second conductive region, and the non-sensing portion is located at
In second electric field, the voltage difference absolute value of second electric field is zero or is less than or equal to preset first voltage threshold
Value, so that the non-sensing portion being located in the second electric field is in scattering state.
In some embodiments, the second electrode includes third conductive region and the 4th conductive region, the third
Insulation gap is arranged between conductive region and the 4th conductive region, and the third conductive region is opposite with first conductive region
Setting, the 4th conductive region is oppositely arranged with second conductive region, and the third conductive region is for described the
One conductive region forms first electric field, and the 4th conductive region is used to form described second with second conductive region
Electric field.
In some embodiments, the second electrode is the full wafer electrode for not forming different conductive regions.
In some embodiments, the first conductive region in the first electrode is hollowed out and forms notch or through-hole,
The diffusion sheet further includes third electrode, and the third electrode is arranged in side of the first electrode backwards to second electrode, and with institute
It states notch or through-hole is oppositely arranged, the third electrode is used to form first electric field with second electrode.
It in some embodiments, further comprise receiving unit, the receiving unit is arranged below display device, institute
State receiving unit for through the reception of at least partly display device via the light that target object returns to execute to the target
The sensing of object.
In some embodiments, it is defined as penetrating via the part of target object return projector on the diffusion layer
Second detecting part, the first electrode is used for and the position of second electrode second detecting part described in face forms third electric field,
The electric field strength of the third electric field can be independently adjustable, and second detecting part can be with the electric-field strength of the third electric field
Degree variation is converted at least between pellucidity and scattering state, and the light returned via target object can be through in transparent
Second detecting part of state is received by the receiving unit.
It in some embodiments, further comprise receiving unit, the receiving unit is not through the display device and connects
Receive the light returned via target object.
The application embodiment provides a kind of electronic equipment comprising feels under the screen as described in above-mentioned any one embodiment
Examining system.The electronic equipment executes corresponding function to the sensing result of the target object according to sensing system under the screen
Energy.
Since sensing system under screen provided by the present application and electronic equipment can be sent out using the adjustable diffusion sheet collocation of transparency
The transmitting unit for penetrating structure light light, by being arranged in the diffusion sheet position opposite with the transmitting unit below display device
Can the electric field region of independent control realize the adjustment of transparency, the transmitting unit is multiplexed through diffusion sheet to send out
Structure light light and floodlight light are penetrated, element is not only saved, moreover it is possible to realize under the premise of not influencing display effect and feel under screen
It surveys, to further increase the screen accounting of electronic equipment, promotes the visual experience of electronic equipment.
The additional aspect and advantage of the application embodiment will be set forth in part in the description, partially will be from following
Become obvious in description, or is recognized by the practice of the application embodiment.
Detailed description of the invention
Fig. 1 is the front schematic view for the electronic equipment that the application embodiment provides.
Fig. 2 is the partial structure diagram of electronic equipment shown in Fig. 1.
Fig. 3 is the front schematic view that the application one changes the electronic equipment that embodiment provides.
Fig. 4 is the partial structure diagram of electronic equipment shown in Fig. 3.
Fig. 5 is the front schematic view that the application one changes the electronic equipment that embodiment provides.
Fig. 6 is the structural schematic diagram of backlight module described in Fig. 2.
Fig. 7 is the overlooking structure diagram of diffusion sheet shown in Fig. 6
Fig. 8 is schematic cross-sectional view of the diffusion sheet shown in Fig. 7 along VIII-VIII.
Fig. 9 is diffusion sheet shown in Fig. 6 for generating the square-wave signal schematic diagram that individually controllable electric field is applied.
Figure 10 is a kind of schematic top plan view for electrode structure that the application one changes the diffusion sheet that embodiment provides.
Figure 11 is schematic cross-sectional view of the diffusion sheet shown in Fig. 10 along XI-XI.
Figure 12 is a kind of electrode structure schematic diagram that the application one changes the diffusion sheet that embodiment provides.
Figure 13 is a kind of schematic top plan view for electrode structure that the application one changes the diffusion sheet that embodiment provides.
Figure 14 is schematic cross-sectional view of the diffusion sheet shown in Figure 13 along XIV-XIV.
Figure 15 is a kind of electrode structure schematic diagram that the application one changes the diffusion sheet that embodiment provides.
Figure 16 is the structural schematic diagram that the application one changes the backlight module that embodiment provides.
Specific embodiment
Presently filed embodiment is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the application, and should not be understood as the limitation to the application.In
In the description of the present application, it is to be understood that term " first ", " second " are only used for describing, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic or put in order.Define as a result, " first ",
The technical characteristic of " second " can explicitly or implicitly include one or more technical characteristic.In retouching for the application
In stating, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present application, it should be noted that unless otherwise specific regulation or limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration connection；It can
To be mechanical connection, it is also possible to be electrically connected or is in communication with each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship between two elements be can be.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
Following disclosure provides many different embodiments or example is used to realize the different structure of the application.In order to
Simplify disclosure herein, hereafter only to the component of specific examples and being set for describing.Certainly, they are merely examples, and
And purpose does not lie in limitation the application.
In addition, the application can reuse reference number and/or reference letter, this reuse in different examples
It is itself not indicated between the various embodiments discussed and/or setting to simplify and clearly state the application
Particular kind of relationship.In addition, provided various specific techniques and material are only to realize the application skill to the application in the following description
The example of art scheme, but those of ordinary skill in the art should be aware that the technical solution of the application can also be by hereafter not
Other techniques and/or other materials of description are realized.
Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner
In formula.In the following description, many details are provided so as to fully understand presently filed embodiment.However, this
Field technical staff will be appreciated that even if without one or more in the specific detail, or using other structures, group
Member etc. can also practice the technical solution of the application.In other cases, it is not shown in detail or describes known features or operation
To avoid the emphasis of fuzzy the application.
Also referring to Fig. 1 and Fig. 2, the application embodiment provides a kind of electronic equipment 1.The electronic equipment 1 is for example
But be not limited to mobile phone, laptop, tablet computer, e-book, personal digital assistant, touch-control interactive terminal etc..Institute
Stating electronic equipment 1 includes shielding lower sensing system 11, memory 12 and processor 14.Sensing system 11 is used for target under the screen
Object projective structure light light and floodlight light are sensed.The target object can be located at the outside of electronic equipment 1.The screen
Lower sensing system 11 includes display device 3 and the sensing mould group 10 for being at least partially disposed in 3 lower section of display device.
The application for convenience of description, when describing the positional relationship between 3 internal element of display device to hang down
The display light direction I of straight 3 display surface of display device is reference, and the position I relatively leans on the former to be located at I in the direction in the direction
Top of the position compared with latter.Conversely, in the direction the position I compared with latter be located in the direction the position I compared with leaning on the former lower section.
The display device 3 includes display panel 30 and the backlight module 4 positioned at 30 lower section of display panel.It is described aobvious
Show panel 30 for showing picture.The backlight module 4 is used to provide backlight light for the display panel 30.From the backlight
The backlight light that mould group 4 is emitted to the display panel 30 is visible light.The region for defining the display of display device 3 picture is
Display area 31 can not show that the region of picture is non-display area 32 in the display device 3.In the present embodiment, institute
State the periphery that non-display area 32 is located at display area 31.The display panel 30 is, for example, liquid crystal display panel.So, it changes
Ground, the display panel 30 can also be the display panel of other suitable types, such as electronic paper display panel.
It is described sensing mould group 10 be at least partially disposed on the display device 3 lower section and 31 face of display area
Position at.The sensing mould group 10 is at least partially disposed in the display area 31 in the projection in display device 3.The biography
Feel mould group 10 to be used to emit light sensing to the target object being located at outside display device 3 through at least partly display device 3.Example
Such as, the sensing mould group 10 emits light sensing to target object through display panel 30 and backlight module 4.
Optionally, the sensing mould group 10 is further used for receiving the light returned via target object, and according to being connect
The light received realizes corresponding sensing.It include but is not limited to sense mould group 10 to emit via the light that target object returns
Light sensing to target object is entered inside target object by light that target object reflects back or the light sensing
The light for transmitting and returning from target object surface again after diffusing reflection is propagated.The sensing mould group 10 can pass through described
Display panel 30 and/or backlight module 4 emit the light sensing, and receive the light returned via target object.The mesh
Mark object is such as, but not limited to user's finger, user's face or other suitable positions or is other suitable objects
And be not limited to human body etc..
The sensing mould group 10 be such as, but not limited to for according to the light that receives execute biological information sensing,
Two dimension and/or 3-D image sensing, 3 D stereo modeling, distance sensing etc..Wherein, biological information sensing include but
It is not limited to finger print information sensing, facial three-dimensional information sensing, biological information sensing etc..
In the present embodiment, the sensing mould group 10 is through the display panel 30 and the transmitting sensing light of backlight module 4
Line receives the light returned via target object to target object, and through the display panel 30 and backlight module 4.It changes
Ground, the sensing mould group 10 can also be not through display device 3 or the subelement transmitting light sensing through the display device 3
To target object, and the sensing mould group 10 is returned through the display panel 30 and the reception of backlight module 4 via target object
Light.Alternatively, the sensing mould group 10 emits light sensing to target pair through the display panel 30 and backlight module 4
As, and the sensing mould group 10 can also be not through the display device 3 or receive warp through the subelement of the display device 3
The light sensing returned by target object.
It should be noted that the structure setting of the sensing mould group 10 is not limited to shown in illustrations, can also be
Various other suitable constructions.
The memory 12 is such as, but not limited to the biological information template for prestoring one or more samples.Again
For example, the memory 12 is also used to store the data, relevant to sensing that the sensing mould group 10 generates during the sensing process
Program implements data required for sensing correlation function.The processor 14 is used for the sensing obtained to the sensing mould group 10
Information performs corresponding processing, and is deposited in the biological information and memory 12 that the sensing mould group 10 obtains for example, comparing
The biological information template of storage realizes the identification to the target object according to comparison result.For another example the processing
Device 14 can be used for executing program relevant to sensing.For another example the processor 14 can be used for being felt according to the sensing mould group 10
The threedimensional model of the three-dimensional information construction target object of the target object measured or position and the shape for judging the target object
State.The electronic equipment 1 can be corresponding according to the sensing result of the sensing mould group 10 and/or the processing result of the processor 14
Execute relevant function, such as: extinguish screen, removing screen locking, payment, login account, into next stage menu, open power
Limit, identification identity, avoidance, building three-dimensional scenic etc..
In the present embodiment, the memory 12 and processor 14 are in the electronic equipment 1 independently of sensing mould group
The component of 10 settings.So, ground is changed, may alternatively be integrated within institute some or all of in the memory 12 and/or processor 14
It states in sensing mould group 10.
The sensing mould group 10 includes transmitting unit 100.The transmitting unit 100 is arranged below the backlight module 4
In the range of 31 face of display area.The transmitting unit 100 is used for the display area 31 through the display device 3
It is sensed on target object outside projection light sensing to display device 3.
In the present embodiment, the sensing mould group 10 is three-dimensional sensing mould group, can be used for sensing target object, such as:
Face surface, depth information.The sensing principle of the three-dimensional sensing mould group includes structure light sensing principle, flight time
(Time Of Fly, TOF) senses principle and binocular senses principle.
Below with the illustration of structure light sensing principle.Fig. 4 is referred to, the transmitting unit 100 includes sensing light source 101
With modulation element 103.The sensing light source 101 is for emitting original ray.The modulation element 103 is arranged in the sensing light
On the projecting light path in source 101.The modulation element 103 is used to sense the original ray that light source 101 issues and is modulated to structure light
Light.Sensing system 11 can be separately operable under floodlight irradiation mode and project structured light mode under the screen.It is irradiated in floodlight
Under mode, the structure light light that the transmitting unit 100 issues is scattered during through display device 3 as to four sides eight
The highly diffuse floodlight light in side, the floodlight light formed through display device 3 are projected on the target object.In
Under project structured light mode, the structure light light that the transmitting unit 100 issues is thrown after can penetrating display device 3 without distortion
It penetrates on the target object, and then projects preset sensing light pattern on the target object.In the present embodiment,
The sensing mould group 10 to the light sensing that the target object emits include structure light light and floodlight light.The modulation element
Part 103 is diffraction optical element (Diffractive Optical Element, DOE).The structure light light is pattern
Light light.
Optionally, in other change embodiments, the modulation element 103 can also be encoding mask (mask).Institute
Stating structure light light is coded structured light light.
According to sensing principle and application scenarios, the light sensing has specific wavelength.In the present embodiment, described
Sensing light source 101 can be but be not limited to vertical cavity surface emitting laser (Vertical Cavity Surface Emitting
Laser, VCSEL), light emitting diode (Light Emitting Diode, LED) or laser diode (Laser Diode,
LD).The original ray can be infrared or near infrared light, wave-length coverage be 750 nanometers (nanometer, nm) extremely
2000nm.Ground is changed, in other embodiments, the light sensing also can be replaced other suitable sensing signals, example
Such as ultraviolet light, ultrasonic wave, electromagnetic wave.
The sensing mould group 10 further comprises receiving unit 102.The receiving unit 102 can be set in the display
The lower section of device 3.The receiving unit 102 is used to receive the light returned via target object through at least partly display device 3
Line.In the present embodiment, as shown in Figure 1, the receiving unit 102 is arranged below backlight module 4 and the display area
In the range of 31 faces.That is, the receiving unit 102 is located in the display area 31 in the projection in display device 3.It is described
Receiving unit 102 receives the light returned via target object through display panel 30 and backlight module 4, and according to receiving
Light executes the sensing to the target object.It is understood that described show can also be arranged in the receiving unit 102
The inside of showing device 3.Such as, but not limited to: the receiving unit 102 can be to be arranged in the pixel region of display panel 30
Photosensitive element.It is connect after the display panel 30 of the light permeation parts returned via target object by the photosensitive element
It receives, to be sensed to the target object.
Optionally, as shown in figure 4, the receiving unit 102 includes camera lens 104 and the figure positioned at 104 lower section of camera lens
As sensor 106.It is received by the camera lens 104 by described image sensor 106 via the light that the target object returns.
Described image sensor 106 for example according to received light obtain the floodlight image of the target object, be incident upon target pair
As the image or other associated sensed data of upper structured light patterns, to realize corresponding sensing.So, in certain embodiments
In, the camera lens 104 also can be omitted or be replaced by other elements, such as be replaced by beam collimation element.
As shown in Figure 3 and Figure 4, in other modifiable embodiments, the receiving unit 102 is arranged in the display
In the range of 3 lower section of device and 32 face of non-display area.Such as: the display device 3 includes being arranged on display panel 30
Cover board 33.The cover board 33 includes with the first part of display panel face and the second part beyond display panel edge.
The second part of the cover board 33 is located in the non-display area 32 of display device 3.The receiving unit 102 can be set in institute
In the range of lower section and 32 face of non-display area of stating 33 second part of cover board.The receiving unit 102 penetrates cover board
33 receive via the light that target object returns to be sensed accordingly.
As shown in figure 5, the receiving unit 102 can also be not through described aobvious in other modifiable embodiments
Showing device 3 receives the light returned via target object.Such as, but not limited to, the display device 3 is special-shaped water droplet screen, In
The top of screen edge open up it is jagged, the receiving unit 102 can be set in the notch and need not be through display dress
Set 3 reception light.The setting of transmitting unit 100 of the sensing mould group 10 is shown in backlight module 4 (see Fig. 4) lower section with described
In the range of showing 31 face of region.
As shown in Figure 2 and Figure 6, the backlight module 4 can be used for providing for the display panel 30 backlight light and thoroughly
The light sensing is crossed, backlight is provided with satisfaction simultaneously for display panel 30 and the sensing mould is set below display device 3
The requirement of group 10.The backlight module 4 includes back light 40, light guide plate 42, reflector plate 44, diffusion sheet 46 and brightening piece 5.
The light guide plate 42 include light-emitting surface 420, the bottom surface 422 opposite with the light-emitting surface 420 and described in connect out
Incidence surface 424 between smooth surface 420 and bottom surface 422.The corresponding incidence surface 424 of the back light 40 is arranged, for providing
Backlight light is to light guide plate 42.The backlight light projects after mixing in light guide plate 42 from light-emitting surface 420.The reflector plate 44
It is arranged on the bottom surface 422 of light guide plate 42, the backlight light for will release from the bottom surface of light guide plate 42 422 is reflected back light guide plate
In 42, to improve the utilization rate of backlight light.The reflector plate 44 for example reflects visible light by can pass through the light sensing
Material be made, the backlight light so as to be located in visible wavelength range is reflected back light guide plate 42, while again can be with
Through infrared or near-infrared light sensing.
420 side of light-emitting surface of light guide plate 42 is arranged in the brightening piece 5, bright for increasing going out for the backlight light
Degree.Optionally, the brightening piece 5 can for reflecting type polarizing film (Dual Brightness Enhancement Film,
DBEF).50% or so backlight illumination can be improved in the reflecting type polarizing film, and will not significantly deflect institute's transmitted light
The direction of propagation.
420 side of light-emitting surface of light guide plate 42 is arranged in the diffusion sheet 46, that is, is located at the top of the light guide plate 42.Institute
Diffusion sheet 46 is stated for scattering the backlight light to realize atomizing effect.
As shown in Figure 7 and Figure 8, the diffusion sheet 46 includes first electrode 461, second electrode 462 and diffusion layer 463.Institute
It states first electrode 461 and second electrode 462 is oppositely arranged.The setting of diffusion layer 463 is in the first electrode 461 and the second electricity
Between pole 462.Specifically, the diffusion layer 463 includes the upper surface 4631 and lower surface 4632 being oppositely arranged.First electricity
Pole 461 is arranged in the upper surface 4631.The second electrode 462 is arranged in lower surface 4632.
The first electrode 461 and second electrode 462 can be used for applying the different piece of diffusion layer 463 respectively corresponding
Electric field.The mist degree of institute's transmitted light can be adjusted in the diffusion layer 463 with the intensity of locating electric field, so that being located at
Part diffusion layer 463 in the electric field can at least be converted between pellucidity and scattering state.The diffusion layer
463 parts in pellucidity are lower to the mist degree of institute's transmitted light, such as: mist degree is less than or equal to 10%, so that institute
The light of transmission can continue to propagate without distortion.The diffusion layer 463 is in the part of scattering state to the light penetrated
Mist degree with higher, such as: mist degree is greater than or equal to 70%, so that the light penetrated is in the mist to all the winds dissipated
Change effect.It is understood that can also at least allow diffusion layer 463 to be in transparent by adjusting electric field locating for diffusion layer 463
Intermediate state between state and scattering state, the range of mist degree is, for example, and is greater than when the diffusion layer 463 is in intermediate state
10% and less than 70%.
The diffusion layer 463 can be formal polymer dispersed liquid crystal layer Polymer Dispersion Liquid
Crystal, PDLC), trans- PDLC layer, polymer network liquid crystal layer (Polymer Network Liquid Crystal,
) or bistable state cholesteric crystal layer PNLC.
In the present embodiment, the diffusion layer 463 is formal PDLC layer, including polymeric matrix 464 and is distributed in institute
State the liquid crystal molecule 465 in 464 internal clearance of polymeric matrix.The liquid crystal molecule 465 is in the case where being not powered on field in institute
The state in polymeric matrix 464 in disordered orientation is stated, there is apparent dispersion effect to through light therein.At this point, institute
It states diffusion layer 463 and is in the scattering state, can be used as the use of diffusion sheet 46.Work of the liquid crystal molecule 465 in default electric field
Arranged with lower along direction of an electric field is unified, hardly the light penetrated interfered, allow penetrated light not
Distortion ground passes through the diffusion layer 463.At this point, the diffusion layer 463 is in pellucidity.Therefore, pass through control described first
Electrode 461 and second electrode 462 can make diffusion layer 463 be located at the portion of applied electric field in the electric field that diffusion layer 463 applies
Dividing can at least be converted between pellucidity and scattering state.
The first detecting part 82 is defined as the part through the structure light light on the diffusion layer 463.The expansion
It dissipates and also defines non-sensing portion 83 on layer 463.The non-sensing portion 83 of the diffusion layer 463 is not needed through for executing sensing
Light.The light for executing sensing includes structure light light, floodlight light and the light returned via target object.Institute
State first electrode 461 and second electrode 462 be arranged in at the position of 82 face of the first detecting part.The diffusion sheet 46 exists
Electrode is not provided in region where the non-sensing portion 83 of the diffusion layer 463.The first electrode 461 is used for and second electrode
The position of 462 the first detecting parts 82 described in face forms the first electric field.The electric field strength of first electric field can pass through first
Electrode 461 and second electrode 462 are separately adjustable.The diffusion layer 463 is located at the first detecting part 82 in the first electric field can be with
First electric field electric field strength variation converted at least between pellucidity and scattering state.
When sensing system 11 operates in floodlight irradiation mode under the screen, by changing the first electrode 461 and the
The electric signal that two electrodes 462 apply is dissipated with adjusting first electric field so that the first detecting part 82 of the diffusion layer 463 is in
Penetrate state.The mist degree of institute's transmitted light can be for example greater than or equal to when the diffusion layer 463 is in scattering state preset
First mist degree threshold value, such as: 70%.In the present embodiment, the diffusion layer 463 is formal PDLC layer.When passing through described the
When the voltage difference absolute value for the electric signal that one electrode 461 and second electrode 462 apply is zero, the first sense of the diffusion layer 463
Survey portion 82 is in scattering state.In view of the voltage signal applied is understood, there is a certain error, so passing through first electricity
The voltage difference absolute value for the electric signal that pole 461 and second electrode 462 apply is less than or equal to preset less times greater than no-voltage
First voltage threshold value, such as: 1 volt, it is also possible that first detecting part 82 is in scattering state.The first voltage threshold value
Value range be 0 volt to 1 volt.At this point, the structure light light that the transmitting unit 100 issues passes through first in scattering state
Detecting part 82 scatters to be incident upon target object after floodlight light.
When sensing system 11 operates in project structured light mode under the screen, by changing 461 He of first electrode
The electric signal that second electrode 462 applies is to adjust first electric field, so that the first sensing area 82 of the diffusion layer 463 is in
Pellucidity.The mist degree to institute's transmitted light when the diffusion layer 463 is in pellucidity can for example be equal to or less than pre-
If the second mist degree threshold value, such as: 10%.In the present embodiment, the diffusion layer 463 is formal PDLC layer.By described
The voltage difference absolute value for the electric signal that first electrode 461 and second electrode 462 apply is greater than or equal to preset second voltage threshold
When value, the first detecting part 82 of the diffusion layer 463 is in scattering state.At this point, the knot that the transmitting unit 100 issues
Structure light light can be incident upon on target object through the first detecting part 82 in pellucidity.Because of first detecting part
82 are in lower to the mist degree of institute's transmitted light when pellucidity, and the structure light light is through first in pellucidity
It is undistorted after detecting part 82.It is understood that for different types of liquid crystal molecule 465, the second voltage threshold value can be with
Different value is taken, such as: 5 volts, 10 volts etc..In the present embodiment, the value range of the second voltage threshold voltage be 5 volts extremely
100 volts.
When sensing system 11 does not work under the screen, applied by changing the first electrode 461 and second electrode 462
Electric signal to adjust the first electric field so that the first detecting part 82 of the diffusion layer 463 is in scattering state.At this point, described
First detecting part 82 of diffusion layer 463 be in scattering state can the backlight light to transmission be diffused and homogenize, restore
Its normal display effect.
It is understood that if exhausted by the voltage difference of the first electrode 461 and the electric signal of the application of second electrode 462
To value between first voltage threshold value and second voltage threshold value, the first detecting part 82 of the diffusion layer 463 is in intermediate shape
State.The mist degree of the intermediate state is between the first mist degree threshold value and the second mist degree threshold value.It is understood that according to
Actual demand can also preset more mist degree threshold values and corresponding voltage threshold intermediate state and be sub-divided into more multimode.
In addition, the electric signal applied by the first electrode 461 and second electrode 462 is so that first detecting part
82 when being converted to pellucidity, the polarity of the voltage of applied electric signal positive and negative can turn, at this time the liquid crystal molecule 465
It deflects direction difference but not influences the transparency or mist degree of first detecting part 82.
It is understood that relationship between the light transmission features and applied electric field of the trans- PDLC and described formal
PDLC is opposite.Therefore, when using trans- PDLC as diffusion layer 463, the state of the diffusion layer 463 and corresponding mist degree threshold
On the contrary, details are not described herein when value and voltage threshold and formal PDLC are as diffusion layer 463.
It is understood that the application to the overlying relation between the first electrode 461 and second electrode 462 not
It limits, as long as being separately positioned on the opposite sides of the diffusion layer 463 and electricity can be formed on the diffusion layer 463 respectively
Field areas.
It is understood that the transmitting unit 100 can be set in the position with 82 face of the first detecting part.Institute
Stating transmitting unit 100 also can be set in the other positions not with 82 face of the first detecting part, then will by light guide structure
The structure light light conduction that the transmitting unit 100 issues is to the position with 82 face of the first detecting part through described the
One detecting part 82 is emitted.
In the present embodiment, the diffusion sheet 46 is not provided with electricity in opposite sides of the non-sensing portion 83 along light transmission direction
Pole.Therefore, it not will form electric field in the non-sensing portion 83 and be constantly in scattering state, the backlight light penetrated is played
Scattering and homogenization, realize normal display effect.
Therefore, the diffusion sheet 46 with above structure can answer the transmitting unit 100 of emitting structural light light originally
For emitting structural light light and floodlight light, element is saved, simplifies modular structure, thus also reduces product cost.
Moreover, when the transmitting unit 100 does not need emitting structural light light, the first detecting part 82 of the diffusion sheet 46 can also be with
Scattering state is converted to so as to restore normal display effect.
In the present embodiment, can be respectively by the electric signal that the first electrode 461 and second electrode 462 apply
The first constant voltage signal with preset the first voltage value and the second constant voltage letter with preset second voltage value
Number.
When the first detecting part 82 of the diffusion layer 463 needs to be converted to scattering state, the first voltage value and the
Voltage absolute value of the difference between two voltage values is zero, or is less than or equal to the first voltage threshold value.
When the first detecting part 82 of the diffusion layer 463 needs to be converted to pellucidity, the first voltage value and the
Voltage absolute value of the difference between two voltage values is greater than or equal to the second voltage threshold value.Alternatively, the first voltage value is
No-voltage, and the absolute value of second voltage value is greater than or equal to the second voltage threshold value.Because the liquid crystal molecule 465 exists for a long time
The voltage difference effect of identical polar is lower to be deflected past for a long time toward same direction and is easy to produce polarization phenomena, so adjacent
The second voltage value of second constant voltage applied when needing to be converted to pellucidity twice can take positive non-zero respectively
Voltage and negative non-zero voltage.The positive non-zero voltage and negative non-zero voltage can have identical absolute value, it is possible to have no
Same absolute value.
It is understood that changing in embodiment at other, when the first detecting part 82 of the diffusion layer 463 needs
When being converted to pellucidity, the electric signal that the first electrode 461 and second electrode 462 apply can be respectively with preset
The constant voltage signal of the first voltage value and alternating voltage signal with preset positive negative peak.Wherein, the first voltage
Value can be no-voltage or non-zero voltage.The first voltage value voltage difference between positive peak and negative peak respectively it is absolute
Value is greater than or equal to the second voltage threshold value.
As shown in figure 9, the alternating voltage signal can be square-wave signal.The square-wave signal has positive peak and negative peak
Value.The peak positive voltage of the square wave and the absolute value of negative peak voltage can be equal or unequal.The non-zero voltage
And/or the value range of square-wave signal crest voltage is 5 volts to 100 volts or -5 volts to -100 volts.The liquid crystal molecule 465
Pellucidity can be presented along the unified arrangement of direction of an electric field in the lasting period of peak positive voltage and negative peak voltage.Just,
Negative peak voltage carries out liquid crystal molecule 465 described in the transition period can carry out deflection along different directions of an electric field can prevent pole
Change.The sensing timing of the sensing mould group 10 and the timing synchronization of the alternating voltage signal, the sensing mould group 10 is in square wave
The middle section of the lasting period of one or more snippets any crest voltage of signal is sensed.The sensing of the sensing mould group 10
Frequency can be the multiple of the alternating voltage signal frequency.Such as: the sensing frequency of the sensing mould group 10 is the alternation
2 times of voltage signal frequency, i.e., the described sensing mould group 10 perform during a peak positive voltage or negative peak voltage continue
It senses twice.Alternatively, the sensing frequency of the sensing mould group 10 is 1/2 times of the alternating voltage frequency, i.e., the described sensing mould
The primary sensing of group 10 needs to undergo the lasting period an of peak positive voltage and a negative peak voltage.The alternating voltage letter
Number frequency and the display device 3 refreshing frequency between there is no a frequency multiplication relationship, such as the alternating voltage signal and described
The refresh signal of display device 3 is respectively from different signal source of clock.
In the present embodiment, the frequency of the alternating voltage signal is 20 hertz, a peak positive voltage or negative peak
The duration of voltage is 25 milliseconds.The duration ranges of sensing 10 sensor operations of mould group are 2 milliseconds to 20 millis
Second.The sensor operation of the sensing mould group 10 is, for example, the floodlight image and/or sensing light that receiving unit 102 obtains target object
The exposure actions when image of pattern, i.e., the duration of the described sensor operation are the time for exposure for sensing a frame image.
It is understood that changing in embodiment at other, the alternating voltage signal can also be for positive and negative
The sine wave signal or triangular signal of crest voltage.
It is understood that changing in embodiment at other, the first electrode 461 and second electrode 462 apply
Electric signal can also be respectively the first alternating voltage signal with preset positive negative peak and with preset positive negative peak
The second alternating voltage signal.
As shown in Figure 10 and Figure 11, in other change embodiments, the first electrode 461 includes the first conductive region
471 and second conductive region 472.Insulation gap is arranged between first conductive region 471 and the second conductive region.Described
First detecting part 82 described in one conductive region, 471 face is configured.Non-sensing portion described in second conductive region, 472 face
83 are configured.The second electrode 462 is used to form the first electric field with first conductive region 471.The second electrode
For forming the second electric field with second conductive region 472.Second electric field can be independently adjustable.The diffusion layer 463
Non-sensing portion 83 be located in second electric field.Therefore, make its voltage absolute value of the difference by adjusting second electric field
Zero or be less than or equal to preset first voltage threshold value, can make be located at the second electric field in the non-sensing portion be in dissipate
Penetrate state.
Specifically, in the present embodiment, the second electrode 462 includes third conductive region 473 and the 4th conduction region
Domain 474.Insulation gap is arranged between the third conductive region 473 and the 4th conductive region 474.The third conductive region
473 are oppositely arranged with the first conductive region 471 of first electrode 461.4th conductive region 474 and first electrode 461
Second conductive region 472 is oppositely arranged.The third conductive region 473 is used to be formed with first conductive region 471 described
First electric field.4th conductive region 474 is used to form second electric field with the second conductive region 472.Pass through described
Three conductive regions 473 and the first conductive region 471 adjust first electric field, so that being located at the first detecting part in the first electric field
82 can convert at least between pellucidity and scattering state according to the need of work of transmitting unit 100.Pass through the described 4th
Conductive region 474 and the second conductive region 472 adjust second electric field, so that being located at the non-sensing portion in the second electric field
83 maintain scattering state.
As shown in figure 12, in other change embodiments, the second electrode 462 may be not form difference to lead
The full wafer electrode in electric region.The second electrode 462 part opposite with first conductive region 471 is used for and described first
Conductive region 471 forms first electric field.It uses the second electrode 462 part opposite with second conductive region 472
In forming second electric field with second conductive region 472.
As shown in Figure 13 and Figure 14, the first conductive region in other change embodiments, in the first electrode 461
471 can also be hollowed out and form notch 469 or through-hole 469.The diffusion sheet 46 further includes third electrode 466.The third
Electrode 466 is arranged in first electrode 461 backwards to 462 side of second electrode, and opposite with the notch 469 or through-hole 469.It is described
Third electrode 466 is used to form first electric field through the notch 469 or through-hole 469 and the second electrode 462.Because institute
It states the first detecting part 82 described in original first conductive region, 471 face in first electrode 461 to be configured, first sensing
Portion 82 is located at first electricity that the third electrode 466 is formed through the notch 469 or through-hole 469 and second electrode 462
In, the electric-field strength of first electric field can be changed by the electric signal that the third electrode 466 applies with second electrode 462
Degree, so that first detecting part 82 can be according to the need of work of transmitting unit 100 at least in pellucidity and dispersion shape
It is converted between state.The second conductive region 472 in the first electrode 461 or for forming described the with second electrode 462
Two electric fields.The non-sensing portion 83 of the diffusion layer 463 is located in second electric field.It is no longer repeated herein.
It is understood that can according to be arranged in below the display device 3 in 31 face region of display area
The element number of mould group 10 is sensed to adjust the number of the detecting part in the diffusion layer 463 and for converting the detecting part
The electric field number of light transmission state.For example, the receiving unit 102 is arranged below display device 3 with the display area 31 just
Pair position.As shown in figure 15, for being defined as the through the part via target object return projector on the diffusion layer 463
Two detecting parts 84.The first electrode 461 and second electrode 462 can form the in the position of the second detecting part 84 described in face
Three electric fields.Specifically, the first electrode 461 can also include the 5th conductive region 475.5th conductive region 475 divides
Mutually insulated interval is arranged not between first conductive region 471 and the second conductive region 472.5th conductive region
Second detecting part 84 described in 475 faces is configured.It can be between 5th conductive region 475 and the second electrode 462
Form the third electric field.The electric field strength of the third electric field can be independently adjustable.Second detecting part 84 can be with
The electric field strength variation of the third electric field is converted at least between pellucidity and scattering state.It is returned via target object
Light can be received through the second detecting part 84 in pellucidity by the receiving unit 102.5th conductive region
475 and second electrode 462 by adjust third electric field when the receiving unit 102 does not work by 84 turns of second detecting part
It is changed to scattering state, to play scattering and homogenization to the backlight light penetrated, restores the part and normally shows effect
Fruit.
The receiving unit 102 can be set in the position with 84 face of the second detecting part.The receiving unit 102
Also it can be set in the other positions not with 84 face of the second detecting part, then will be returned via target object by light guide structure
The light conduction returned is to receiving unit 102.
As shown in figure 8, the diffusion sheet 46 can also include the upper substrate 467 and lower substrate 468 being oppositely arranged.On described
Substrate 467 and lower substrate 468 are made of translucent material.The material of the upper substrate 467 and/or lower substrate 468 can be but not
It is limited to glass, polycarbonate (PC), polymethyl methacrylate (PMMA) and poly terephthalic acid class plastics (Polyethylene
Terephthalate, PET) in the combination of any one or more.It is understood that the upper substrate 467 and lower substrate
468 can be manufactured from the same material, and can also be made from a variety of materials respectively, the application does not limit this.
The diffusion layer 463 is arranged between the upper substrate 467 and lower substrate 468, forms similar sandwich sandwich
Structure.It, can because the upper substrate 467 and lower substrate 468 have certain protective effect to the diffusion layer 463 between being disposed therein
The loss in use process to the diffusion layer 463 is effectively reduced, so that the diffusion sheet 46 has better durability.
The upper substrate 467 includes the first surface 4671 and second surface 4672 being oppositely arranged.The first surface
4671 towards the outside of diffusion sheet 46, and the second surface 4672 is towards the inside of diffusion sheet 46.The lower substrate 468 includes phase
To setting third surface 4681 and the 4th surface 4682.The third surface 4681 is towards the outside of diffusion sheet 46.Described 4th
Surface 4682 is towards the inside of the diffusion sheet 46.
The first electrode 461 and second electrode 462 can be separately positioned on the Different Plane of 463 opposite sides of diffusion layer
On.Such as: it is described if the first electrode 461 is arranged on the first surface 4671 or second surface 4672 of upper substrate 467
Second electrode 462 can be correspondingly arranged on the third surface 4681 or the 4th surface 4682 of lower substrate 468.If first electricity
When pole 461 is arranged on the third surface 4681 or the 4th surface 4682 of lower substrate 468, the second electrode 462 can be corresponded to
It is arranged on the first surface 4671 or second surface 4672 of the upper substrate 467.
The third electrode 466 and first electrode 461 are separately positioned on the Different Plane positioned at 463 the same side of diffusion layer
On.For example, as shown in figure 14, the third electrode 466 and first electrode 461 are separately positioned on opposite first of upper substrate 467
Surface 4671 and second surface 4672.Alternatively, the third electrode 466 and first electrode 461 are separately positioned on 468 phase of lower substrate
Pair third surface 4681 and the 4th surface 4682.
As shown in fig. 6, the backlight module 4 further includes the optical element that 46 top of diffusion sheet is arranged in.Described
One electrode 461 or second electrode 462 also can be set on the wherein one layer of optical element being located above the diffusion sheet 46.Example
Such as: in the present embodiment, the backlight module 4 includes the brightening piece 5 that 46 top of diffusion sheet is arranged in.The first electrode
461 or second electrode 462 can be set on the brightening piece 5.
The backlight module 4 further includes the optical element being arranged in below the diffusion sheet 46.The first electrode 461 or
Second electrode 462 also can be set on the wherein one layer of optical element being located at below the diffusion sheet 46.Such as: in this implementation
In mode, the backlight module 4 includes the light guide plate 42 and reflector plate 44 being arranged in below diffusion sheet 46.The first electrode
461 or second electrode 462 can be set on the light guide plate 42 or reflector plate 44.The reflector plate 44 is by that can penetrate sensing
Light and the material for reflecting visible light is made.
In other change embodiments, the reflector plate 44 is made of conductive metal, and the reflector plate 44 can be multiplexed
For the first electrode 461 or second electrode 462.The thinner thickness of the reflector plate 44, such as: 100nm, so that the wavelength
Longer light sensing can be through reflector plate 44 and the shorter visible light of wavelength can be reflected back light guide plate by the reflector plate 44
42。
As shown in figure 16, in other change embodiments, the electronic equipment 1 further includes being arranged in the backlight module
The frame 6 of 4 lower sections.The frame 6 is made of conductive metal, can be used for supporting the backlight module 4.The frame 6 is corresponding to be passed
The element of sense mould group 10 offers through-hole 62.The frame 6 can be multiplexed with the first electrode 461 (referring to Figure 14).
Compared with prior art, the electronic equipment 12 can emitting structural light using the adjustable collocation of diffusion sheet 46 of transparency
The transmitting unit 100 of light, by being set in the diffusion sheet 46 position opposite with the transmitting unit 100 below display device 3
Set can the electric field region of independent control realize the adjustment of transparency, enable the transmitting unit 100 to penetrate diffusion sheet 46
Multiplexing comes emitting structural light light and floodlight light, not only saves element, moreover it is possible to real under the premise of not influencing display effect
Now the lower sensing of screen promotes the visual experience of electronic equipment 12 to further increase the screen accounting of electronic equipment 12.
It should be noted that it will be understood by those skilled in the art that without creative efforts, the application
Some or all of embodiment, and the deformation for some or all of embodiment, replacement, change, fractionation, combination, extension
Cover Deng being considered as creating thought by present invention, belongs to the protection scope of the application.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the application.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The foregoing is merely the better embodiments of the application, all the application's not to limit the application
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within spirit and principle.
Claims (15)
1. sensing system under a kind of screen, for being sensed to target object projective structure light light and floodlight light, the screen
Lower sensing system includes: display device, and for showing picture, the display device is for showing that the region of picture is defined as showing
Region can not show that the region of picture is defined as non-display area in the display device, and the display device includes display surface
Plate and the backlight module being arranged in below display panel, which is characterized in that sensing system further comprises under the screen:
Transmitting unit, in the range of setting below the backlight module with the display area face, for issuing structure
Light light；
Wherein, the backlight module includes diffusion sheet, and the diffusion sheet includes first electrode, second electrode and diffusion layer, described
Diffusion layer is arranged between the first electrode and second electrode, for the portion through the structure light light on the diffusion layer
Divide and be defined as the first detecting part, the first electrode is used for and second electrode is in the first electricity of the position of first detecting part formation
, the electric field strength of first electric field can be independently adjustable, and the first detecting part of the diffusion layer can be with described first
The electric field strength variation of electric field is converted at least between pellucidity and scattering state, and first detecting part is in pellucidity
When, the structure light light that the transmitting unit issues can be projected through the first detecting part in pellucidity, described
When first detecting part is in scattering state, the structure light light that the transmitting unit issues passes through the first sensing in scattering state
Portion's scattering is that floodlight light is projected.
2. as described in claim 1 shield lower sensing system, which is characterized in that the part that the diffusion layer is in pellucidity is right
The mist degree of institute's transmitted light is less than or equal to 10%, and the diffusion sheet is in mist degree of the part to institute's transmitted light of scattering state
More than or equal to 70%.
3. as described in claim 1 shield lower sensing system, which is characterized in that the diffusion layer is selected from formal polymer dispersion liquid
Any one in crystal layer, trans- polymer dispersed liquid crystal layer, polymer network liquid crystal layer and cholesteric crystal layer.
4. as claimed in claim 3 shield lower sensing system, which is characterized in that the diffusion layer is formal polymer dispersed liquid crystals
Layer, the formal polymer dispersed liquid crystal layer are zero in the voltage difference absolute value of locating electric field or are less than or equal to preset the
Scattering state is in when one voltage threshold, the formal polymer dispersed liquid crystal layer is greater than in the voltage difference absolute value of locating electric field
Or pellucidity is in when being equal to preset second voltage threshold value.
5. as described in claim 1 shield lower sensing system, which is characterized in that the transmitting unit includes light source and diffraction optics
Element, the light source are used to the original ray being modulated to structure light for issuing original ray, the diffraction optical element
Light.
6. as claimed in claim 5 shield lower sensing system, which is characterized in that the structure light light is pattern light light
Line.
7. sensing system under screen as described in claim 1 or 4, which is characterized in that the diffusion layer is located in display area, institute
It states and defines non-sensing portion on diffusion layer, the non-sensing portion is not needed through the light for executing sensing.
8. as claimed in claim 7 shield lower sensing system, which is characterized in that the light for executing sensing includes structure
Light light, floodlight light and the light returned via target object.
9. as claimed in claim 7 shield lower sensing system, which is characterized in that the first electrode and second electrode setting with
At the position of the first detecting part face, opposite sides of the non-sensing portion along light transmission direction is not provided with electrode.
10. as claimed in claim 7 shield lower sensing system, which is characterized in that the first electrode includes the first conductive region
And second conductive region, the first detecting part described in the first conductive region face are configured, second conductive region is just
The non-sensing portion is configured, insulation gap is arranged between first conductive region and the second conductive region, and described the
Two electrodes are used to form first electric field with the first conductive region, and the second electrode is used to be formed the with the second conductive region
Two electric fields, the non-sensing portion are located in second electric field, and the voltage difference absolute value of second electric field is zero or is less than
Or it is equal to preset first voltage threshold value, so that the non-sensing portion is in scattering state.
11. as claimed in claim 10 shield lower sensing system, which is characterized in that the second electrode includes third conductive region
And the 4th conductive region, insulation gap is arranged between the third conductive region and the 4th conductive region, the third conduction region
Domain is oppositely arranged with first conductive region, and the 4th conductive region is oppositely arranged with second conductive region, described
Third conductive region is used to form first electric field with first conductive region, the 4th conductive region be used for it is described
Second conductive region forms second electric field；Or
The second electrode is the full wafer electrode for not forming different conductive regions.
12. as claimed in claim 11 shield lower sensing system, which is characterized in that the first conductive region in the first electrode
It is hollowed out and forms notch or through-hole, the diffusion sheet further includes third electrode, and the third electrode setting is carried on the back in first electrode
It is oppositely arranged to the side of second electrode, and with the notch or through-hole, the third electrode is used to form institute with second electrode
State the first electric field.
13. as described in claim 1 shield lower sensing system, which is characterized in that further comprise receiving unit, the reception is single
Member is arranged below display device, and the receiving unit is used to return through the reception of at least partly display device via target object
Light to execute the sensing to the target object.
14. as claimed in claim 13 shield lower sensing system, which is characterized in that for through via target on the diffusion layer
The part of object return projector is defined as the second detecting part, and the first electrode is used for and second electrode second sense described in face
The position in survey portion forms third electric field, and the electric field strength of the third electric field can be independently adjustable, and second detecting part can
It converts at least between pellucidity and scattering state as the electric field strength of the third electric field changes, is returned via target object
The light returned can be received through the second detecting part in pellucidity by the receiving unit.
15. a kind of electronic equipment, which is characterized in that including sensing system under the screen as described in any one of claim 1-14
System, the electronic equipment execute corresponding function to the sensing result of the target object according to sensing system under the screen.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110908189A (en) * | 2019-11-29 | 2020-03-24 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN111983837A (en) * | 2020-08-19 | 2020-11-24 | 武汉华星光电技术有限公司 | Liquid crystal display device and electronic apparatus |
| CN112198716A (en) * | 2020-10-26 | 2021-01-08 | 武汉华星光电技术有限公司 | Liquid crystal display screen and liquid crystal display device |
| CN113296306A (en) * | 2021-06-03 | 2021-08-24 | 武汉天马微电子有限公司 | Liquid crystal display device |
| CN114185199A (en) * | 2021-12-13 | 2022-03-15 | 翰博高新材料(合肥)股份有限公司 | High-brightness thinned backlight structure |
| CN114779491A (en) * | 2022-06-20 | 2022-07-22 | 安思疆科技(南京)有限公司 | Terminal display module and mobile terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012004922A1 (en) * | 2010-07-08 | 2012-01-12 | シャープ株式会社 | Liquid-crystal display system and method for controlling a liquid-crystal display system |
| US20180224678A1 (en) * | 2015-06-12 | 2018-08-09 | Samsuung Electronics Co., Ltd. | Display apparatus |
| CN109739046A (en) * | 2019-01-16 | 2019-05-10 | 柳州阜民科技有限公司 | Electronic equipment and backlight module |
| CN109782482A (en) * | 2019-01-16 | 2019-05-21 | 柳州阜民科技有限公司 | Electronic equipment |
| CN209168110U (en) * | 2018-04-18 | 2019-07-26 | 深圳阜时科技有限公司 | Identification authentication device and electronic equipment |
-
2019
- 2019-08-17 CN CN201910761114.0A patent/CN110458131A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012004922A1 (en) * | 2010-07-08 | 2012-01-12 | シャープ株式会社 | Liquid-crystal display system and method for controlling a liquid-crystal display system |
| US20180224678A1 (en) * | 2015-06-12 | 2018-08-09 | Samsuung Electronics Co., Ltd. | Display apparatus |
| CN209168110U (en) * | 2018-04-18 | 2019-07-26 | 深圳阜时科技有限公司 | Identification authentication device and electronic equipment |
| CN109739046A (en) * | 2019-01-16 | 2019-05-10 | 柳州阜民科技有限公司 | Electronic equipment and backlight module |
| CN109782482A (en) * | 2019-01-16 | 2019-05-21 | 柳州阜民科技有限公司 | Electronic equipment |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110908189A (en) * | 2019-11-29 | 2020-03-24 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN111983837A (en) * | 2020-08-19 | 2020-11-24 | 武汉华星光电技术有限公司 | Liquid crystal display device and electronic apparatus |
| WO2022036740A1 (en) * | 2020-08-19 | 2022-02-24 | 武汉华星光电技术有限公司 | Liquid crystal display apparatus and electronic device |
| US20230111777A1 (en) * | 2020-08-19 | 2023-04-13 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display device and electronic equipment |
| US11868006B2 (en) * | 2020-08-19 | 2024-01-09 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display device and electronic equipment |
| CN112198716A (en) * | 2020-10-26 | 2021-01-08 | 武汉华星光电技术有限公司 | Liquid crystal display screen and liquid crystal display device |
| CN113296306A (en) * | 2021-06-03 | 2021-08-24 | 武汉天马微电子有限公司 | Liquid crystal display device |
| CN114185199A (en) * | 2021-12-13 | 2022-03-15 | 翰博高新材料(合肥)股份有限公司 | High-brightness thinned backlight structure |
| CN114779491A (en) * | 2022-06-20 | 2022-07-22 | 安思疆科技(南京)有限公司 | Terminal display module and mobile terminal |
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