CN110441946A - A kind of display panel and its driving method and display device - Google Patents
A kind of display panel and its driving method and display device Download PDFInfo
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- CN110441946A CN110441946A CN201910757990.6A CN201910757990A CN110441946A CN 110441946 A CN110441946 A CN 110441946A CN 201910757990 A CN201910757990 A CN 201910757990A CN 110441946 A CN110441946 A CN 110441946A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- 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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Image Input (AREA)
Abstract
The present invention provides a kind of display panel and its driving method and display device.The display panel includes backlight module, display screen and touch objects recognition component, the light emission side of backlight module is arranged in display screen, the side that backlight module deviates from display screen is arranged in touch objects recognition component, backlight module can provide display light for display screen, the touch objects that touch objects recognition component for identification touches display screen, to unlock display screen, aid imaging structure is provided in backlight module, aid imaging structure setting is in touch objects recognition component in orthographic projection region on backlight module, for receiving the light and backlight light of touch objects reflection, and the interference light of the two is made to be incident to touch objects recognition component.Touch objects recognition component in the display panel even if thickness of displays is larger, will not influence the intensity for the probing light that touch objects recognition component receives, so as to identify touch objects recognition component clearly to touch objects in fingerprint recognition under realizing screen.
Description
Technical field
The invention belongs to field of display technology, and in particular to a kind of display panel and its driving method and display device.
Background technique
OLED (Organic Light-Emitting Diode, Organic Electricity laser display or organic luminous semiconductor) at present
It is more prevalent using unlocked by fingerprint function under optical profile type screen on mobile phone, but OLED screen can not be advised greatly due to production capacity and yield
Mould popularization and application.Liquid crystal display is excessive since there are thickness of liquid crystal by LCD (Liquid Crystal Display), so that light
The probing light intensity of fingerprint recognition is weaker under formula screen, and fingerprint clearly can not be imaged.
At present since the mobile phone of mainstream in the market is still based on LCD, so how to make fingerprint recognition skill under optical profile type screen
Art is preferably applied for LCD screen as current urgent problem to be solved.
Summary of the invention
The present invention is directed to the problems of the prior art, provides a kind of display panel and its driving method and display device.It should
Touch objects recognition component in display panel, even if thickness of displays is larger, will not be influenced in fingerprint recognition under realizing screen
The intensity for the probing light that touch objects recognition component receives, so as to know that touch objects recognition component clearly to touch objects
Not.
The present invention provides a kind of display panel, including backlight module, display screen and touch objects recognition component, the display screen
The light emission side of the backlight module is set, and the touch objects recognition component setting deviates from the display screen in the backlight module
Side, the backlight module can provide display light for the display screen, and the touch objects recognition component is for identification to institute
The touch objects that display screen is touched are stated, to unlock the display screen, aid imaging structure is provided in the backlight module,
The aid imaging structure setting in the touch objects recognition component in the orthographic projection region on the backlight module, for connecing
The light and backlight light of the touch objects reflection are received, and the interference light of the two is made to be incident to the touch objects recognition component.
Preferably, the backlight module includes reflector plate, light guide plate and light source, and the light guide plate and the reflector plate are mutual
It is stacked and is successively distributed far from the display screen, the light source is set on the outside of the edge of the light guide plate；
Hollowed out area is offered on the reflector plate, the aid imaging structure setting is in the hollowed out area.
It preferably, further include pressure sensing element, the pressure sensing element is set in the display screen, and is located at institute
It states in the orthographic projection region of aid imaging structure on the display screen, for sensing touching of the touch objects to the display screen
Touch pressure.
It preferably, further include control module, the driving electricity of the control module and the pressure sensing element, the light source
The driving circuit of road and the display screen is electrically connected, for sensing the touch objects to institute in the pressure sensing element
When stating the touch pressure of display screen, the light luminance highest that the light source exposes in the aid imaging structure is controlled, and control
The orthographic projection region for making the aid imaging structure on the display screen shows highest grayscale.
Preferably, lattice point structure, the site knot are formed on the one side of the close reflector plate of the light guide plate
The light luminance that structure is used to that the light guide plate light emission side to be made to project is uniform；
Distribution density of the lattice point structure in the aid imaging structure orthographic projection region is greater than it in the light guide plate
The distribution density in other regions.
Preferably, the aid imaging structure includes polaroid.
Preferably, the display screen includes liquid crystal cell, upper polaroid and down polaroid, and the upper polaroid is arranged described
The incident side of the liquid crystal cell is arranged in the light emission side of liquid crystal cell, the down polaroid；
The polaroid is identical as the polarization direction of the down polaroid.
The present invention also provides a kind of driving methods of above-mentioned display panel, comprising: when touch objects touch display screen
When unlock, aid imaging structure receives the light of touch objects reflection and is irradiated to backlight light thereon, both makes mutually
Interference generates interference light, and the interference light can be incident to touch objects recognition component, and the touch objects recognition component is according to institute
Interference light is stated to identify the touch objects.
Preferably, the display panel is display panel as claimed in claim 4, and the driving method includes:
When pressure sensing element senses touch pressure of the touch objects to the display screen, control module controls light
Source exposes to the light luminance highest in the aid imaging structure, and controls the aid imaging structure on the display screen
Orthographic projection region shows highest grayscale.
The present invention also provides a kind of display devices, including above-mentioned display panel.
Beneficial effects of the present invention: display panel provided by the present invention, by the way that aid imaging is arranged in backlight module
Structure can make touch objects be reflected into light thereon and be irradiated to backlight light rays encounter interference thereon, generate interference image, this
Interference image is the hologram for clearly having recorded finger print information, due to interference image record be light phase information,
Influenced very little by the intensity of light, thus the touch objects recognition component in the display panel realize screen under fingerprint recognition when,
Even if thickness of displays is larger, the intensity for the probing light that touch objects recognition component receives will not be influenced, so as to make to touch
It touches object recognition component and touch objects is clearly identified.
Display device provided by the present invention makes the display device in thickness of displays by using above-mentioned display panel
In biggish situation, probing light intensity not will receive when being able to achieve the lower optical finger print identification of screen yet, and shielding lower fingerprint recognition
It influences, improves the clarity and sensitivity that finger touch unlocks under display device screen.
Detailed description of the invention
Fig. 1 is the schematic structural cross-sectional view of display panel in the embodiment of the present invention 1；
Fig. 2 is the structure top view of reflector plate and the aid imaging structure being disposed therein in Fig. 1.
Wherein appended drawing reference are as follows:
1, backlight module；11, reflector plate；12, light guide plate；120, lattice point structure；13, light source；2, display screen；21, liquid crystal
Box；22, upper polaroid；23, down polaroid；3, touch objects recognition component；4, aid imaging structure；5, touch objects.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Formula is described in further detail a kind of display panel of the present invention and its driving method and display device.
Embodiment 1:
The present embodiment provides a kind of display panels, as shown in Figure 1, including backlight module 1, display screen 2 and touch objects identification
The light emission side of backlight module 1 is arranged in element 3, display screen 2, and the setting of touch objects recognition component 3 deviates from display screen in backlight module 1
2 side, backlight module 1 can provide display light for display screen 2, and touch objects recognition component 3 for identification carries out display screen 2
The touch objects 5 of touch are provided with aid imaging structure 4 to unlock display screen 2 in backlight module 1, and aid imaging structure 4 is set
Touch objects recognition component 3 is placed in the orthographic projection region on backlight module 1, for receiving the light and back of the reflection of touch objects 5
Light light, and the interference light of the two is made to be incident to touch objects recognition component 3.
Wherein, touch objects 5 are finger print.Display screen 2 is liquid crystal display.Touch objects recognition component 3 can make this aobvious
Show that panel is realized and shields lower fingerprint recognition.The display panel can make to touch by the way that aid imaging structure 4 is arranged in backlight module 1
Object 5 is reflected into light thereon and is irradiated to backlight light rays encounter interference thereon, generates interference image, this interference image is clear
The clear hologram for having recorded finger print information, fingerprint is different, and interference image is different, and what it is due to interference image record is light
Phase information is influenced very little by the intensity of light, so the touch objects recognition component 3 in the display panel refers in the case where realizing screen
When line identifies, even if 2 thickness of display screen is larger, the intensity for the probing light that touch objects recognition component 3 receives will not be influenced,
So as to identify touch objects recognition component 3 clearly to touch objects 5.
In the present embodiment, backlight module 1 includes reflector plate 11, light guide plate 12 and light source 13, light guide plate 12 and reflector plate 11
Stacked on top of each other and be successively distributed far from display screen 2, light source 13 is set on the outside of the edge of light guide plate 12；It is offered on reflector plate 11
Hollowed out area, aid imaging structure 4 are set in hollowed out area (as shown in Figure 2).The light that light source 13 issues can be from light guide plate
12 edge end face is incident in light guide plate 12, the equalizing light rays that light guide plate 12 can issue light source 13, so that even back.
Reflector plate 11 can will be reflected back in light guide plate 12 from the light projected in light guide plate 12, so that most light can be from leading
The light-emitting surface towards display screen 2 of tabula rasa 12 projects, and improves the utilization rate of backlight light.Since touch objects recognition component 3 is arranged
In the side away from display screen 2 of backlight module 1, so being arranged aid imaging structure 4 in reflector plate 11, on the one hand can
On the other hand preferably receiving the light that touch objects 5 reflect and the light that light source 13 issues can make to inject touch objects 5 therein
The light rays encounter interference that the light and light source 13 of reflection issue, and make that light is interfered to inject touch objects recognition component 3, to make to touch
Touching object recognition component 3 preferably can identify touch objects 5 by received interference light.
Preferably, in the present embodiment, display panel further includes pressure sensing element (not shown), pressure sensing element
It is set in display screen 2, and is located in the orthographic projection region of aid imaging structure 4 on the display screen 2, for sensing touch objects 5
To the touch pressure of display screen 2.The pressure sensing element can use pressure sensor.
Display panel further includes control module (not shown), the drive of control module and pressure sensing element, light source 13
The driving circuit of dynamic circuit and display screen 2 is electrically connected, for sensing touch objects 5 to display screen 2 in pressure sensing element
Touch pressure when, control light source 13 exposes to the light luminance highest in aid imaging structure 4, and controls auxiliary on display screen 2
The orthographic projection region of imaging arrangement 4 is helped to show highest grayscale (such as L255, grayscale 255), i.e., light when display screen 2 is shown is saturating
Cross rate highest.So set, the light luminance highest that aid imaging structure 4 can be made to receive, to make touch objects recognition component 3
The brightness highest of the interference light received, and then improve the clarity and sensitivity of the identification of touch objects 5.
In the present embodiment, by setting pressure sensing element and control module, unlock display screen can be touched in touch objects 5
When 2, the region of the corresponding aid imaging structure 4 of display screen 2 is adjusted to highest grayscale immediately and is shown, and light is corresponded to and is irradiated
Light source 13 to 4 region of aid imaging structure is adjusted to maximum brightness, to improve the clarity and sensitive of the identification of touch objects 5
Degree.
In the present embodiment, lattice point structure 120, lattice point structure are formed on the one side of the close reflector plate 11 of light guide plate 12
120 light luminance for projecting 12 light emission side of light guide plate is uniform；Lattice point structure 120 is in 4 forward projection region of aid imaging structure
The distribution density in domain is greater than it in the distribution density in 12 other regions of light guide plate.Wherein, since aid imaging structure 4 is to light
Albedo is less than reflector plate 11 to the albedo of light, and in addition when fingerprint recognition unlocks, aid imaging structure 4 corresponds to area
The backlight illumination in domain is greater than the backlight illumination in other regions, so so set, on the one hand can be right to aid imaging structure 4
The reflection of light and reflector plate 11 compensate the reflection differences of light, aid imaging when on the other hand can also be to fingerprint recognition
The backlight light luminance difference in 12 other regions of 4 corresponding region of structure and light guide plate compensates, to make entire display panel
Backlight illumination tend to uniformly, and then while ensuring normally to show, moreover it is possible to carry out sensitive touch to display screen 2 and unlock.
Preferably, in the present embodiment, aid imaging structure 4 includes polaroid.In addition, display screen 2 include liquid crystal cell 21, on
The light emission side of liquid crystal cell 21 is arranged in polaroid 22 and down polaroid 23, upper polaroid 22, and down polaroid 23 is arranged in liquid crystal cell
21 incident side；Polaroid is identical as the polarization direction of down polaroid 23.In this way, under the light being reflected back in touch objects 5 passes through
Polaroid 23 can just be incident to polaroid, and could backlight light generation interference identical with the polarization direction of polaroid is passed through.
In addition, touch objects recognition component 3 can use semiconductor imaging device, such as charge-coupled device in the present embodiment
(CCD) or complementary metal oxide semiconductor (CMOS sensor).According to principle of holography, gone back by holographic built in display panel
Former algorithm can carry out holographic reduction (such as Fourier transformation method) to the interference ingredient for receiving image on semiconductor imaging device,
Other iconic elements can not be reduced on semiconductor imaging device, thus obtain the three-dimensional holographic image of touch objects 5.Entirely
Cease image it is more common flat image precision it is higher, and due to interference picture record be light phase information, by light
Intensity size influence it is smaller.
In the present embodiment, the detailed process of the touch objects unlock display screen of display panel are as follows:
(1) light source unlocked using display panel backlight as touch objects (such as fingerprint).Utilize the subregion control of back light
System, when carrying out unlocked by fingerprint function (using pressure sensor integrated in the pressure sensor or screen built in display panel
Perceive finger pressure), the corresponding high brightness backlights in unlocked by fingerprint region are opened, and the corresponding display screen area in unlocked by fingerprint region
Domain shows L255 grayscale, at this time the light penetration highest of display screen.
(2) due to the corresponding display screen light penetration highest in unlocked by fingerprint region at this time, and backlight has been opened, therefore is carried on the back
The light that light source issues is emitted in the form of linearly polarized light after down polaroid, liquid crystal cell and upper polaroid.
(3) finger is square on a display screen at this time, therefore finger can reflect the linearly polarized light of outgoing, and pass sequentially through polarisation
Piece, liquid crystal cell and down polaroid are projected in the form of linearly polarized light to the direction of backlight, enter to inject backlight film group, this light is denoted as
L1。
(4) reflector plate of backlight module does hollow processing in the corresponding part in unlocked by fingerprint region, and in the portion of hollow out
Divide and places polaroid identical with the polarization direction L1.In order to keep the backlight homogeneity after reflector plate hollow processing, corresponding
Light guide plate region carries out difference design to the distribution density of lattice point structure, and the brightness of adjustable different back lights is protected
Hold the homogeneity of backlight.
(5) simultaneously, the light that back light issues is transmitted out of light guide plate, is understood some light and is escaped below light guide plate,
It is irradiated on the polaroid of reflector plate hollow part, and can be emitted along corresponding polarization direction, this light is denoted as L2.
(6) simultaneously, L1 light can pass through each film layer of backlight module and polaroid, and be emitted along corresponding polarization direction.
The polarization direction of L1 light and L2 light is identical.
(7) since the polarization direction of L1 with L2 two-beam is identical, therefore interference effect can be generated.It is arranged in below polaroid
The interference image that touch objects recognition component (being equivalent to picture receiver part) such as CCD or CMOS, L1 and L2 are generated can be in image
It is imaged on receiving device.
(8) interference image that L1 and L2 is generated under different fingerprints is different, therefore can be by detection interference image not
Together to be identified to fingerprint, and image can be received according to principle of holography by retrieving algorithm holographic built in display panel
The interference ingredient that image is received on device carries out holographic reduction (such as Fourier transformation method), other figures on picture receiver part
As ingredient can not be reduced, the three-dimensional holographic image of fingerprint has thus been obtained.The more common flat image precision of hologram image
It is higher, and due to interference picture record be light phase information, influenced by the intensity size of light smaller.
Above structure based on display panel, the present embodiment also provide a kind of driving method of display panel, comprising: when
When touch objects carry out touching unlock to display screen, aid imaging structure receives the light of touch objects reflection and is irradiated to back thereon
Light light makes the two interfere generation interference light, and interference light can be incident to touch objects recognition component, and touch objects identification is first
Part identifies touch objects according to interference light.
In the present embodiment, driving method further includes the touch pressure when pressure sensing element senses touch objects to display screen
When, control module control light source exposes to the light luminance highest in aid imaging structure, and controls aid imaging on display screen
The orthographic projection region of structure shows highest grayscale.
Embodiment 1 the utility model has the advantages that display panel provided in embodiment 1, pass through and auxiliary be set in backlight module
Imaging arrangement can make touch objects be reflected into light thereon and be irradiated to backlight light rays encounter interference thereon, generate interference pattern
Picture, this interference image are the hologram for clearly having recorded finger print information, due to interference image record be light phase
Information is influenced very little by the intensity of light, so the fingerprint in the case where realizing screen of the touch objects recognition component in the display panel is known
When other, even if thickness of displays is larger, the intensity for the probing light that touch objects recognition component receives will not be influenced, so as to
Identify touch objects recognition component clearly to touch objects.
Embodiment 2:
The present embodiment provides a kind of display devices, including the display panel in embodiment 1.
By using display panel provided in embodiment 1, make the situation that the display device is larger in thickness of displays
Under, it not will receive the influence of probing light intensity when being able to achieve the lower optical finger print identification of screen yet, and shielding lower fingerprint recognition, improve
The clarity and sensitivity that finger touch unlocks under display device screen.
Display device provided by the present invention can be any for LCD panel, LCD TV, display, mobile phone, navigator etc.
Products or components having a display function.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of display panel, including backlight module, display screen and touch objects recognition component, the display screen is arranged in the back
The light emission side of optical mode group, the side that the backlight module deviates from the display screen is arranged in the touch objects recognition component, described
Backlight module can provide display light for the display screen, and the touch objects recognition component for identification carries out the display screen
The touch objects of touch, to unlock the display screen, which is characterized in that aid imaging structure is provided in the backlight module,
The aid imaging structure setting in the touch objects recognition component in the orthographic projection region on the backlight module, for connecing
The light and backlight light of the touch objects reflection are received, and the interference light of the two is made to be incident to the touch objects recognition component.
2. display panel according to claim 1, which is characterized in that the backlight module include reflector plate, light guide plate and
Light source, the light guide plate and the reflector plate are stacked on top of each other and be successively distributed far from the display screen, and the light source is set to institute
On the outside of the edge for stating light guide plate；
Hollowed out area is offered on the reflector plate, the aid imaging structure setting is in the hollowed out area.
3. display panel according to claim 2, which is characterized in that it further include pressure sensing element, the pressure-sensing
Element is set in the display screen, and is located in the orthographic projection region of the aid imaging structure on the display screen, is used
In the sensing touch objects to the touch pressure of the display screen.
4. display panel according to claim 3, which is characterized in that it further include control module, the control module and institute
The driving circuit for stating pressure sensing element, the driving circuit of the light source and the display screen is electrically connected, for described
When pressure sensing element senses touch pressure of the touch objects to the display screen, control the light source expose to it is described auxiliary
The light luminance highest on imaging arrangement is helped, and the orthographic projection region for controlling the aid imaging structure on the display screen is shown
Highest grayscale.
5. display panel according to claim 4, which is characterized in that the side close to the reflector plate of the light guide plate
Lattice point structure is formed on face, the light luminance that the lattice point structure is used to that the light guide plate light emission side to be made to project is uniform；
The lattice point structure the aid imaging structure orthographic projection region distribution density be greater than its light guide plate other
The distribution density in region.
6. display panel described in -5 any one according to claim 1, which is characterized in that the aid imaging structure includes inclined
Mating plate.
7. display panel according to claim 6, which is characterized in that the display screen include liquid crystal cell, upper polaroid and
The light emission side of the liquid crystal cell is arranged in down polaroid, the upper polaroid, and the liquid crystal cell is arranged in the down polaroid
Incident side；
The polaroid is identical as the polarization direction of the down polaroid.
8. a kind of driving method of the display panel as described in claim 1-7 any one characterized by comprising work as touching
When touching object and carrying out touching unlock to display screen, aid imaging structure receives the light of touch objects reflection and is irradiated to thereon
Backlight light, makes the two interfere generation interference light, and the interference light can be incident to touch objects recognition component, the touching
Object recognition component is touched to identify the touch objects according to the interference light.
9. the driving method of display panel according to claim 8, which is characterized in that the display panel is claim
Display panel described in 4, the driving method include:
When pressure sensing element senses touch pressure of the touch objects to the display screen, control module controls light source and shines
The light luminance highest being incident upon in the aid imaging structure, and control the positive throwing of the aid imaging structure on the display screen
Shadow zone domain shows highest grayscale.
10. a kind of display device, which is characterized in that including display panel described in claim 1-7 any one.
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| CN201910757990.6A CN110441946B (en) | 2019-08-16 | 2019-08-16 | Display panel, driving method thereof and display device |
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