CN110298315A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110298315A CN110298315A CN201910579291.7A CN201910579291A CN110298315A CN 110298315 A CN110298315 A CN 110298315A CN 201910579291 A CN201910579291 A CN 201910579291A CN 110298315 A CN110298315 A CN 110298315A
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- light
- phase separation
- separation layer
- fingerprint recognition
- display panel
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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
- 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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
Abstract
The present invention provides display panel and display device.Display panel includes the fingerprint recognition mould group stacked gradually, pixel array, line polarisation piece, phase separation layer, transparent cover plate, further includes fingerprint recognition light source, and the light that fingerprint recognition light source issues successively passes through line polarisation piece and phase separation layer；The optical axis of phase separation layer is located at the absorption axis direction of line polarisation piece with the direction institute perpendicular to line polarisation piece planar, and the angle of the absorption axiss of the optical axis and line polarisation piece of phase separation layer is not equal to 0 ° and 90 °；The polarization state for the linearly polarized light that line polarisation piece is emitted towards phase separation layer and the optical axis included angle of phase separation layer are not equal to 0 ° and 90 °, linearly polarized light has the first ordinary light and the first extraordinary ray of different polarization states through phase separation layer, first ordinary light is the first numerical value in the light path of phase separation layer, extraordinary ray is second value in the light path of phase separation layer, and the absolute value of the difference of the first numerical value and second value is greater than 100 nanometers and less than 5000 nanometers.The signal enhancing of fingerprint recognition mould group.
Description
[technical field]
The present invention relates to field of display technology more particularly to a kind of display panel and display devices.
[background technique]
Fingerprint is inherent for everyone, with the development of science and technology, occurring a variety of have in the market
The display device of fingerprint identification function, such as mobile phone, tablet computer and intelligent wearable device.User has fingerprint in operation
Before the display device of identification function, it is only necessary to can be carried out Authority Verification with finger touch display unit, simplify permission and test
Card process.With increasing for fingerprint recognition application scenarios, the demand to fingerprint recognition sensitivity is gradually promoted.But existing
In technology, the signal of fingerprint recognition is very weak.
[summary of the invention]
In order to solve the above technical problem, the present invention provides a kind of display panel and display devices.
In a first aspect, the present invention provides a kind of display panel, the display panel includes the fingerprint recognition mould stacked gradually
Group, pixel array, line polarisation piece, phase separation layer, transparent cover plate；
The light that the fingerprint recognition mould group or the pixel array issue successively passes through the line polarisation piece and described
Phase separation layer；
The absorption axis direction of the line polarisation piece is first direction, and the direction perpendicular to the line polarisation piece is second party
To the optical axis of the phase separation layer is located at the first direction and second direction institute planar, the phase separation layer
The angle of the absorption axiss of the optical axis and the line polarisation piece is not equal to 0 ° and 90 °；
The polarization state for the linearly polarized light that the line polarisation piece is emitted towards the phase separation layer and the institute of the phase separation layer
Optical axis included angle is stated not equal to 0 ° and 90 °, the linearly polarized light has the first ordinary light of different polarization states through the phase separation layer
With the first extraordinary ray, first ordinary light is the first numerical value in the light path of the phase separation layer, and the extraordinary ray is in institute
The light path for stating phase separation layer is second value, and the absolute value of the difference of first numerical value and the second value is greater than 100 nanometers
And less than 5000 nanometers.
Second aspect, the present invention provide a kind of display device, and the display device includes the display panel.
In the present invention, the absorption axis direction of line polarisation piece is first direction, and the direction perpendicular to line polarisation piece is second
Direction, the optical axis of phase separation layer are located at first direction and second direction institute planar, the optical axis and line polarisation piece of phase separation layer
Absorption axiss angle be not equal to 0 ° and 90 °.The linearly polarized light of line polarisation piece becomes the first elliptically polarized light by phase separation layer
Rather than circularly polarized light.The optical axis included angle of the polarization state of the linearly polarized light that line polarisation piece is emitted towards phase separation layer and phase separation layer is not
Equal to 0 ° and 90 °.Linearly polarized light can be decomposed into the first ordinary light and the first extraordinary without for light beam in phase separation layer
Line.There are phase differences by phase separation layer for first ordinary light and the first extraordinary ray.First ordinary light and the first extraordinary ray warp
It crosses phase separation layer and synthesizes the first elliptically polarized light.Linearly polarized light through phase separation layer have different polarization states the first ordinary light and
First extraordinary ray, the first ordinary light are the first numerical value in the light path of phase separation layer, and extraordinary ray is in the light path of phase separation layer
The absolute value of the difference of second value, the first numerical value and second value is greater than 100 nanometers and less than 5000 nanometer.Fingerprint recognition mould
Group received optical signal enhancing on the direction of the absorption axiss perpendicular to line polarisation piece.Fingerprint recognition mould group received signal increases
By force, the performance of fingerprint recognition mould group improves.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 refers to the structural schematic diagram of display panel in the prior art；
Fig. 2 is a kind of structural schematic diagram of display panel of the embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of display panel middle line polaroid and phase separation layer of the embodiment of the present invention；
Fig. 4 is a kind of light path schematic diagram of display panel of the embodiment of the present invention；
Fig. 5 is a kind of signal schematic representation of the fingerprint recognition mould group of display panel of the embodiment of the present invention；
Fig. 6 is the signal schematic representation of the fingerprint recognition mould group of display panel in the prior art；
Fig. 7 is the structural schematic diagram of another kind display panel of the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another kind display panel of the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another kind display panel of the embodiment of the present invention；
Figure 10 is the structural schematic diagram of another kind display panel of the embodiment of the present invention；
Figure 11 is a kind of structural schematic diagram of display device of the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though device may be described in embodiments of the present invention using term first, second etc., but these
Device should not necessarily be limited by these terms.These terms are only used to for device being distinguished from each other out.For example, not departing from the embodiment of the present invention
In the case where range, first device can also be referred to as second device, and similarly, second device can also be referred to as the first dress
It sets.
In the prior art, line polarisation piece is added, reduces environment light to display panel using the polarization of line polarisation piece
Display influences, and improves display panel antireflection ability.But due to the addition of line polarisation piece so that light is reflected through external finger
The secondary transmitance by line polarisation piece reduces again, to affect the signal strength that fingerprint recognition mould group receives, reduces
The accuracy of fingerprint recognition
Fig. 1 refers to the structural schematic diagram of display panel in the prior art.
As shown in Figure 1, in the prior art, display panel 100 includes fingerprint recognition mould group 110.When finger F P contact or
When person is close to display panel 100, fingerprint recognition mould 110 received signals of group are very weak.Fig. 6 is the finger of display panel in the prior art
The signal schematic representation of line identification mould group.As shown in fig. 6, fingerprint recognition mould group is in the direction of the absorption axiss X perpendicular to line polarisation piece
Upper received optical signal is very weak.The present inventor has found in the prior art, do not have between line polarisation piece and transparent cover plate after study
Phase separation layer.Light passes through polaroid, and the polarization direction light vertical with plane of light incidence for defining polarised light is S polarized light, when
The polarization direction of the polarised light light parallel with plane of light incidence is P-polarized light.By the polarization state of transparent cover plate reflection S polarized light
It is constant, therefore S polarized light can be again passed through line polarisation piece after finger reflection, but the polarization state of P-polarized light is reflecting
When the change of polarization state occurs, so that polaroid, and P polarization light polarization direction cannot be penetrated when again passing by polaroid
Parallel with plane of light incidence, i.e. the plane of incidence of P-polarized light and the absorption axiss of polarizing film is vertical, so as to cause in vertical absorption axiss side
To the signal that receives of fingerprint recognition mould group it is very weak, influence the other precision of fingerprint.
In order to solve the above technical problem, the present invention provides a kind of display panel and display devices, can not influence edge
The signal strength that the fingerprint recognition mould group of axis direction receives is absorbed, while can be improved and know in the fingerprint for vertically absorbing axis direction
The signal strength that other mould group receives.
Fig. 2 is a kind of structural schematic diagram of display panel of the embodiment of the present invention；Fig. 3 is a kind of display surface of the embodiment of the present invention
The structural schematic diagram of plate middle line polaroid and phase separation layer；Fig. 4 is a kind of light path schematic diagram of display panel of the embodiment of the present invention.
As shown in Fig. 2, display panel 200 includes the fingerprint recognition mould group 210 stacked gradually, pixel array 220, line polarisation
Piece 230, phase separation layer 240, transparent cover plate 250；The light that fingerprint recognition mould group 210 or pixel array 220 issue successively passes through
Cross line polarisation piece 230 and phase separation layer 240；The absorption axis direction of line polarisation piece 230 is first direction X, perpendicular to line polarisation piece
230 direction is second direction Y, and the optical axis O of phase separation layer 240 is located at first direction X and second direction Y institute planar, phase
The angle of the absorption axiss of the optical axis O and line polarisation piece 230 of potential difference layer 240 is not equal to 0 ° and 90 °；Line polarisation piece 230 is towards phase
The polarization state for the linearly polarized light that poor layer 240 is emitted and the optical axis O angle of phase separation layer 240 are not equal to 0 ° and 90 °, linearly polarized light warp
Phase separation layer 240 has the first ordinary light and the first extraordinary ray of different polarization states, and the first ordinary light is in phase separation layer 240
Light path is the first numerical value, and extraordinary ray is second value in the light path of phase separation layer 240, the difference of the first numerical value and second value
Absolute value is greater than 100 nanometers and less than 5000 nanometer.It should be noted that linearly polarized light is indicated with different polarization states
Line polarisation piece has unused polarization direction, polarization state, that is, linearly polarized light polarization direction of linearly polarized light.
Fingerprint recognition mould group 210 or pixel array 220 emit beam towards transparent cover plate 250.Light-emitting line passes through picture
Pixel array 220, line polarisation piece 230, phase separation layer 240, transparent cover plate 250 are emitted.When finger contact or close to transparent cover plate
When 250, finger reflects light-emitting line towards fingerprint recognition mould group 210.The light of finger reflection passes through transparent cover plate 250, phase
The incident fingerprint recognition mould group 210 of poor layer 240, line polarisation piece 230, pixel array 220.It is anti-that fingerprint recognition mould group 210 detects finger
The light penetrated and realize fingerprint recognition.
The light that fingerprint recognition mould group 210 or pixel array 220 issue is non-polarized light L1.The polarization of non-polarized light L1
Direction is random relative to the direction of propagation.The non-polarized light L1 that fingerprint recognition mould group 210 or pixel array 220 issue is incident
Line polarisation piece 230.The online polaroid 230 in polarization direction penetrates line polarisation piece through the part in axis direction in non-polarized light L1
230.Light in non-polarized light L1 in the absorption axis direction of the online polaroid 230 in polarization direction is not through line polarisation piece 230.Line
The absorption axiss of polaroid 230 are in a first direction on X.The transmission axis of line polarisation piece 230 is on third direction Z.First direction X and
Three direction Z are mutually perpendicular to.The transmission axis of line polarisation piece 230 and the absorption axiss of line polarisation piece 230 are mutually perpendicular to.Non-polarized light L1 warp
Crossing line polarisation piece 230 becomes linearly polarized light L2.The light vibration vector of linearly polarized light L2 has in the vertical plane of the direction of propagation
Straight path.Linearly polarized light L2 incident phase difference layer 240.Phase separation layer 240 is birefringece crystal.Linearly polarized light L2 is in phase difference
The first ordinary light and the first extraordinary ray are decomposed into layer 240.The polarization of the polarization state of first ordinary light and the first extraordinary ray
State is different.Polarization state refers to polarization direction.There are phase differences by phase separation layer 240 for first ordinary light and the first extraordinary ray.
First ordinary light and the first extraordinary ray pass through phase separation layer 240 and synthesize the first elliptically polarized light L3.The light of elliptically polarized light
Vibration vector has elliptical orbit in the vertical plane of the direction of propagation.First elliptically polarized light L3 goes out by transparent cover plate 250
It penetrates.When finger contact or close transparent cover plate 250, the first elliptically polarized light L3 is reflected into the second elliptical polarization at finger
Light L4.The polarization state of second elliptically polarized light L4 is different from the polarization state of the first elliptically polarized light L3.Second elliptically polarized light L4
The incident phase difference layer 240 again after the reflection of transparent cover plate 250.Second elliptically polarized light L4 divides in phase separation layer 240
Solution is the second ordinary light and the second extraordinary ray.There are phases by phase separation layer 240 for second ordinary light and the second extraordinary ray
Difference.Second ordinary light and the second extraordinary ray pass through phase separation layer 240 and synthesize third elliptically polarized light L5.Third elliptical polarization
The polarization state of light L5 is different from the polarization state of the second elliptically polarized light L4.Third elliptically polarized light L5 incident ray polaroid 230.The
Light in three elliptically polarized light L5 in the absorption axiss of the online polaroid 230 in polarization direction is not through line polarisation piece 230.Third is ellipse
Part in circularly polarized light L5 in the transmission axis of the online polaroid 230 in polarization direction is through the incident fingerprint recognition of line polarisation piece 230
Mould group 210.
In embodiments of the present invention, the absorption axis direction of line polarisation piece 230 is first direction X, perpendicular to line polarisation piece 230
Direction be second direction Y, the optical axis O of phase separation layer 240 be located at first direction X and second direction Y planar, phase difference
The angle of the absorption axiss of the optical axis O and line polarisation piece 230 of layer 240 is not equal to 0 ° and 90 °.The linearly polarized light of line polarisation piece 230 passes through
Crossing phase separation layer 240 becomes the first elliptically polarized light rather than circularly polarized light.Line polarisation piece 230 is emitted towards phase separation layer 240
The polarization state of linearly polarized light and the optical axis O angle of phase separation layer 240 are not equal to 0 ° and 90 °.If the polarization state of linearly polarized light with
If the angle of phase separation layer is equal to 0 ° or 90 °, linearly polarized light is when by phase separation layer just without extraordinary
The generation of light, so that the addition of phase separation layer is just no can not to contribute in all senses to fingerprint recognition intensity is improved,
So the optical axis O angle of the polarization state for the linearly polarized light that line polarisation piece 230 is emitted towards phase separation layer 240 and phase separation layer 240
Not equal to 0 ° and 90 °.S polarized light in phase separation layer since the polarization direction of S polarized light is perpendicular to the optical axis of phase separation layer,
Therefore S polarized light can penetrate phase separation layer, and polarization state of the S polarized light after the radiation of external finger will not become
S polarized light can reach the other mould group of fingerprint when changing, therefore again passing by phase separation layer and line polarisation piece.
Linearly polarized light can be decomposed into the first ordinary light and the first extraordinary without for light beam in phase separation layer 240
Line.There are phase differences by phase separation layer 240 for first ordinary light and the first extraordinary ray.First ordinary light and the first extraordinary ray
The first elliptically polarized light is synthesized by phase separation layer 240.First elliptically polarized light is emitted by transparent cover plate 250.Work as finger
When contact or close transparent cover plate 250, the first elliptically polarized light is reflected into the second elliptically polarized light at finger.Second is oval
Polarised light passes through 250 incident phase difference layer 240 of transparent cover plate.Second elliptically polarized light include the second elliptically polarized light S polarized light,
Second elliptically polarized light P-polarized light, other polarised lights.The polarization direction of second elliptically polarized light S polarized light and plane of light incidence
Vertically；The polarization direction of second elliptically polarized light P-polarized light is parallel with the plane of incidence of light；Other polarised lights can be decomposed into
Two elliptically polarized light S polarized lights and the second elliptically polarized light P-polarized light.Second elliptically polarized light S polarized light is in phase separation layer
Since the polarization direction of the second elliptically polarized light S polarized light is perpendicular to the optical axis of phase separation layer, therefore the second elliptically polarized light S is inclined
The light that shakes can penetrate phase separation layer, and then penetrate line polarisation piece.Second elliptically polarized light P-polarized light is divided in phase separation layer 240
Solution is the second second ordinary light and the second second extraordinary ray.Second second ordinary light and the second second extraordinary ray pass through phase separation layer 240
There are phase differences.Second second ordinary light and the second second extraordinary ray pass through phase separation layer 240 and synthesize third second elliptically polarized light.
Second elliptically polarized light S polarized light and third second elliptically polarized light synthesize third elliptically polarized light.Third elliptically polarized light enters
Ray polaroid 230.It is inclined that part in third elliptically polarized light in the absorption axiss of the online polaroid 230 in polarization direction is not through line
Mating plate 230.Part in third elliptically polarized light in the transmission axis of the online polaroid 230 in polarization direction penetrates line polarisation piece 230
Incident fingerprint recognition mould group 210.Wherein, linearly polarized light has the first ordinary light and the of different polarization states through phase separation layer 240
One extraordinary ray, the first ordinary light are the first numerical value, light of the extraordinary ray in phase separation layer 240 in the light path of phase separation layer 240
Journey is second value, and the absolute value of the difference of the first numerical value and second value is greater than 100 nanometers and less than 5000 nanometers.Line polarisation
When piece passes through phase separation layer, ordinary light and extraordinary ray are formed in phase separation layer, wherein extraordinary ray compares former incident ray
Have certain phase delay and there is also certain deflections for the direction of propagation, and will affect since the light direction of propagation deflects
The precision of fingerprint recognition, therefore the absolute value of the difference of the first numerical value of ordinary light and extraordinary ray in phase separation layer and second value
Greater than 100 nanometers and less than 5000 nanometers, limit in the range, can guarantee section linearly polarized light pass through phase separation layer
Light can have phase delay to guarantee that the direction of propagation for seeking extraordinary ray of linearly polarized light generates lesser offset as far as possible again.In
It is that the second elliptically polarized light S polarized light is not influenced by phase separation layer big through the transmitance of phase separation layer 240.Second is oval
The transmitance that polarised light P-polarized light becomes third second elliptically polarized light through phase separation layer 240 increases.Second elliptically polarized light is saturating
Crossing phase separation layer 240 becomes the transmitance increase of third elliptically polarized light.Third elliptically polarized light is incident through line polarisation piece 230
The amount of light of fingerprint recognition mould group 210 increases.In the absorption axiss direction of the online polaroid 230 of fingerprint recognition mould group 210
Received optical signal is still very strong.Fingerprint recognition mould group 210 is received on the direction of the absorption axiss perpendicular to line polarisation piece 230
Optical signal enhancing.The performance of the enhancing of 210 received signal of fingerprint recognition mould group, fingerprint recognition mould group 210 improves.
It should be noted that when linearly polarized light and elliptically polarized light are described in the application, with certain
Component is defined and describes, such as S polarized light, P-polarized light, but does not represent linearly polarized light and elliptically polarized light only exists this
A little components are only described in specification specific to a certain polarization direction.
In embodiments of the present invention, received in the absorption axiss direction of the online polaroid 230 of fingerprint recognition mould group 210
Optical signal is still very strong.The received optical signal on the direction of the absorption axiss perpendicular to line polarisation piece 230 of fingerprint recognition mould group 210
Enhancing.The enhancing of 210 received signal of fingerprint recognition mould group.In the prior art, there is no phase between line polarisation piece and transparent cover plate
Poor layer.Light passes through polaroid, and the polarization direction light vertical with plane of light incidence for defining polarised light is S polarized light, works as polarization
The polarization direction of the light light parallel with plane of light incidence is P-polarized light.Polarization state by transparent cover plate reflection S polarized light is not
Become, therefore S polarized light can be again passed through line polarisation piece after finger reflection, but the polarization state of P-polarized light is in reflection
The change that polarization state occurs is waited, so that polaroid cannot be penetrated when again passing by polaroid, so that the arrival fingerprint for being is known
Other module signal is not strong, influences the other precision of fingerprint.Compared with prior art, fingerprint recognition mould group 210 connects the embodiment of the present invention
The performance of the signal enhancing of receipts, fingerprint recognition mould group 210 improves.
Fig. 5 is a kind of signal schematic representation of the fingerprint recognition mould group of display panel of the embodiment of the present invention；Fig. 6 is the prior art
The signal schematic representation of the fingerprint recognition mould group of middle display panel.
As shown in figure 5, in embodiments of the present invention, the absorption axiss place side of the online polaroid 230 of fingerprint recognition mould group 210
Received optical signal is very strong on X.Fingerprint recognition mould group 210 receives on the direction perpendicular to the absorption axiss X of line polarisation piece 230
Optical signal enhancing.As shown in fig. 6, in the prior art, the absorption axiss direction of the online polaroid of fingerprint recognition mould group 110
The upper received optical signal of X is very strong.The received light on the direction perpendicular to the absorption axiss X of line polarisation piece of fingerprint recognition mould group 110
Signal is very weak.The embodiment of the present invention compared with prior art, know by the fingerprint for not influencing to absorb axis direction in the present invention along polaroid
Level signal intensity (S polarized light), and enable to be remarkably reinforced in the signal for absorbing axis direction perpendicular to polaroid, fingerprint recognition
The performance of the enhancing of 210 received signal of mould group, fingerprint recognition mould group 210 improves.
As shown in Figures 2 to 4, the thickness of phase separation layer 240 is greater than 20 microns and less than 60 micron.
In embodiments of the present invention, the thickness of phase separation layer 240 is greater than 20 microns and less than 60 micron, so that linear polarization
First ordinary light of the light through phase separation layer 240 phase separation layer 240 light path and extraordinary ray phase separation layer 240 light path it
Absolute value of the difference is greater than 100 nanometers and less than 5000 nanometer.Then, the absorption of the online polaroid 230 of fingerprint recognition mould group 210
Received optical signal is still very strong in axis direction.Fingerprint recognition mould group 210 is in the absorption axiss perpendicular to line polarisation piece 230
Received optical signal enhancing on direction.The enhancing of 210 received signal of fingerprint recognition mould group, the performance of fingerprint recognition mould group 210 mention
It is high；In the range by the thickness limit of phase separation layer, can guarantee section linearly polarized light by phase separation layer light can
There is phase delay to guarantee that the direction of propagation of the extraordinary ray of linearly polarized light generates lesser offset as far as possible again, does not influence fingerprint knowledge
Other precision.
As shown in Figures 2 to 4, ordinary light phase separation layer 240 refractive index and extraordinary ray phase separation layer 240 refraction
The absolute value of the difference of rate is greater than 0.0017 and less than 0.25.
In embodiments of the present invention, ordinary light is in the refractive index and extraordinary ray of phase separation layer 240 in phase separation layer 240
The absolute value of specific refractivity is greater than 0.0017 and less than 0.25, so that linearly polarized light first through phase separation layer 240 is ordinary
Light phase separation layer 240 light path and extraordinary ray the light path of phase separation layer 240 absolute value of the difference be greater than 100 nanometers and
Less than 5000 nanometers.Then, received optical signal in the absorption axiss direction of the online polaroid 230 of fingerprint recognition mould group 210
Still very strong.The received optical signal enhancing on the direction of the absorption axiss perpendicular to line polarisation piece 230 of fingerprint recognition mould group 210.
The performance of the enhancing of 210 received signal of fingerprint recognition mould group, fingerprint recognition mould group 210 improves, meanwhile, it is capable to which guarantee section line is inclined
Vibration light can have phase delay to guarantee that the direction of propagation for seeking extraordinary ray of linearly polarized light is most again by phase separation layer light
Amount generates lesser offset, does not influence the precision of fingerprint recognition.
Fig. 7 is the structural schematic diagram of another kind display panel of the embodiment of the present invention.
As shown in fig. 7, display panel 200 further includes a quarter between pixel array 220 and line polarisation piece 230
Wave plate 260.
In embodiments of the present invention, display panel 200 further includes between pixel array 220 and line polarisation piece 230
Quarter-wave plate 260.When display panel 200 is in strong light environment, towards pixel array at Qiang Guangcong transparent cover plate 250
220 irradiations, environment light become the first linearly polarized light through line polarisation piece 230, and the first linearly polarized light penetrates quarter-wave plate 260
Become the first circularly polarized light, the first circularly polarized light reflects at 220 side of pixel array becomes the second circularly polarized light, and the second circle is inclined
Vibration light becomes the second linearly polarized light, polarization direction and the line polarisation piece 230 of the second linearly polarized light through quarter-wave plate 260
Through axis direction difference, the second linearly polarized light is not through the outgoing of line polarisation piece 230, in case strong light reflects at display panel 200
Dazzling, enhancing antireflection is avoided that the normal display of influence.
Fig. 8 is the structural schematic diagram of another kind display panel of the embodiment of the present invention.
As shown in figure 8, fingerprint recognition mould group 210 includes optical fingerprint sensor 211, optical fingerprint sensor 211 includes
Photosensitive layer, photosensitive layer include multiple photosensitive elements 212；Fingerprint recognition light source 213, fingerprint recognition light source 213 are located at pixel array
220 far from 250 side of transparent cover plate；The light that fingerprint recognition mould group 210 is used to be issued according to fingerprint recognition light source 213 is via hand
The photosensitive element 212 of digital reflex to fingerprint recognition mould group 210 carries out fingerprint recognition.
In embodiments of the present invention, fingerprint recognition light source 213 emits beam towards transparent cover plate 250.Fingerprint recognition light source
213 light is emitted by pixel array 220, line polarisation piece 230, phase separation layer 240, transparent cover plate 250.When finger contact or
When person is close to transparent cover plate 250, finger reflects light-emitting line towards fingerprint recognition mould group 210.The light of finger reflection is by saturating
The incident photosensitive element 212 of bright cover board 250, phase separation layer 240, line polarisation piece 230, pixel array 220.Photosensitive element 212 detects
The light of finger reflection.Fingerprint recognition mould group 210 realizes fingerprint recognition.
As shown in figure 8, fingerprint recognition light source 213 includes infrared light supply.
In embodiments of the present invention, fingerprint recognition light source 213 issues infrared light using infrared light supply and carries out bio-identification,
And this does not influence normally to show.
As shown in Fig. 2, pixel array 220 includes thin film transistor array layer 221 and light emitting functional layer 222；Light-emitting function
Layer 222 includes first electrode 222A, luminescent layer 222B and second electrode 222C, and the light that luminescent layer 222B is issued is handled digital reflex and arrived
Fingerprint recognition mould group 210 carries out fingerprint recognition.
In embodiments of the present invention, in light emitting functional layer 222, first electrode 222A is anode, and second electrode 222C is
Cathode, luminescent layer 222B include hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer etc..Film
Transistor array layer 221 drives light emitting functional layer 222 to shine.Light emitting functional layer 222 emits beam towards transparent cover plate 250.Hair
The light of light functional layer 222 is emitted by pixel array 220, line polarisation piece 230, phase separation layer 240, transparent cover plate 250.Work as hand
When abutment or close transparent cover plate 250, finger reflects light-emitting line towards fingerprint recognition mould group 210.The light of finger reflection
Line is by transparent cover plate 250, phase separation layer 240, line polarisation piece 230, the incident fingerprint recognition mould group 210 of pixel array 220.Fingerprint
Identification mould group 210 detects the light of finger reflection and realizes fingerprint recognition.
Fig. 9 is the structural schematic diagram of another kind display panel of the embodiment of the present invention.
As shown in figure 9, display panel 200 includes multiple luminescence units 270, luminescence unit 270 includes the first colour light emitting
Unit 271, the second colour light emitting unit 272 and third colour light emitting unit 273；The light that first colour light emitting unit 271 issues
For the first color of light, the light that the second colour light emitting unit 272 issues is the second color of light, and third colour light emitting unit 273 issues
Light be third color of light；The wavelength of first color of light, the second color of light and third color of light is respectively λ1、λ2、λ3, wherein λ1
< λ2< λ3；Phase separation layer 240 includes first part 241, second part 242 and Part III 243, and first part 241 is shining
Layer 222B where plane orthographic projection cover the first luminescence unit 271, second part 242 plane where luminescent layer 222B just
Projection the second luminescence unit 272 of covering, Part III 243 shine single in the orthographic projection covering third of plane where luminescent layer 222B
Member 273；The thickness of first part 241, second part 242 and Part III 243 is respectively d1、d2、d3, wherein d1< d2< d3。
In embodiments of the present invention, the first colour light emitting unit 271 is blue-light-emitting unit, the second colour light emitting unit
272 be green emitting unit, and third colour light emitting unit 273 is emitting red light unit.First part 241 in phase separation layer 240
The first luminescence unit 271 is covered in the orthographic projection of plane where luminescent layer 222B, second part 242 is being sent out in phase separation layer 240
The orthographic projection of plane covers the second luminescence unit 272 where photosphere 222B, and Part III 243 is in luminescent layer in phase separation layer 240
The orthographic projection of plane covers third luminescence unit 273 where 222B.First face of shorter wavelength on first colour light emitting unit 271
First part 241 of the coloured light through relatively small thickness in phase separation layer 240.The of medium wavelength on second colour light emitting unit 272
Second part 242 of the second colors light through medium thickness in phase separation layer 240.Longer wavelength on third colour light emitting unit 273
Third color of light through larger thickness in phase separation layer 240 Part III 243.What the first colour light emitting unit 271 issued
First color of light is decomposed into the first color ordinary light and the first color extraordinary ray by phase separation layer 240, and the first color is ordinary
Light and the first color extraordinary ray reflect at finger and during incident fingerprint recognition mould group 210 at a distance of relatively close.Second
The second color of light that colour light emitting unit 272 issues is decomposed into the second color ordinary light and the second color by phase separation layer 240
Extraordinary ray, the second color ordinary light and the second color extraordinary ray reflect at finger and incident fingerprint recognition mould group 210
During at a distance of relatively close.The third color of light that third colour light emitting unit 273 issues is decomposed into third by phase separation layer 240
Color ordinary light and third color extraordinary ray, third color ordinary light and third color extraordinary ray reflected at finger and
At a distance of relatively close during incident fingerprint recognition mould group 210.Since the wavelength of the first color of light is smaller, first in phase separation layer
The refractive index of color of light is bigger compared to the refractive index of the second color extraordinary ray, third color extraordinary ray, leads to the first face
Coloured light is larger by the direction of propagation deflection that phase separation layer generates the first color extraordinary ray, to influence fingerprint recognition precision；
By the way that the thickness of the phase separation layer of the big light corresponding region of refractive index is smaller to compensate the biography of the light due to caused by different colours light
The deflection for broadcasting direction is different, and then, the fingerprint recognition precision of fingerprint recognition mould group 210 improves.
Figure 10 is the structural schematic diagram of another kind display panel of the embodiment of the present invention.
As shown in Figure 10, phase separation layer 240 includes the first face 240A and the second face 240B being oppositely arranged, the first face 240A
Be phase separation layer 240 close to 250 side of transparent cover plate, the second face 240B be uneven whole face or the first face 240A be uneven whole face or
First face 240A and the second face 240B is uneven whole face.
In embodiments of the present invention, in phase separation layer 240, the second face 240B is uneven whole face or the first face 240A is not
Burnishing surface or the first face 240A and the second face 240B are uneven whole face.The of first face 240A of out-of-flatness and/or out-of-flatness
Adhesive layer has can be set in two face 240B, so that phase separation layer 240 and line polarisation piece 230, phase separation layer 240 and transparent cover plate
250 bondings.
As shown in Figure 10, between phase separation layer 240 and line polarisation piece 230 between phase separation layer 240 and transparent cover plate 250
It further include adhesive layer 280, adhesive layer 280 fills the first face 240A and the second face 240B out-of-flatness part.
In embodiments of the present invention, adhesive layer 280 fills the first face 240A and the second face 240B out-of-flatness part, so that phase
Potential difference layer 240 and line polarisation piece 230, phase separation layer 240 and transparent cover plate 250 bond, can by this inserted type adhesive layer
The degree of adhesion between each film layer is improved, the stability of display panel is more advantageous to.
As shown in Fig. 2, 240 material of phase separation layer includes in quartz, calcite, lithium niobate, lithium tantalate or barium metaborate
It is at least one.
In embodiments of the present invention, 240 material of phase separation layer includes quartz, calcite, lithium niobate, lithium tantalate or metaboric acid
At least one of barium.Quartz, calcite, lithium niobate, lithium tantalate or barium metaborate are birefringece crystals, so that light therein
It is decomposed into ordinary light and extraordinary ray and the polarization state of ordinary light and the polarization state of extraordinary ray is different.
Figure 11 is a kind of structural schematic diagram of display device of the embodiment of the present invention.
As shown in figure 11, display device 300 includes display panel 200.
In embodiments of the present invention, display device 300 using display panel 200 realize display, such as smart phone or
Similar device.Display panel 200 is as described above, repeat no more.
In conclusion the present invention provides display panel and display device.Display panel includes the fingerprint recognition stacked gradually
Mould group, pixel array, line polarisation piece, phase separation layer, transparent cover plate, further include fingerprint recognition light source, and fingerprint recognition light source issues
Light successively pass through line polarisation piece and phase separation layer；The optical axis O of phase separation layer is located at the absorption axis direction of line polarisation piece and hangs down
Directly planar in the direction of line polarisation piece institute, the angle of the absorption axiss of the optical axis O and line polarisation piece of phase separation layer is not equal to 0 °
With 90 °；The polarization state for the linearly polarized light that line polarisation piece is emitted towards phase separation layer and the optical axis O angle of phase separation layer are not equal to 0 °
With 90 °, linearly polarized light has the first ordinary light and the first extraordinary ray of different polarization states through phase separation layer, and the first ordinary light exists
The light path of phase separation layer is the first numerical value, and extraordinary ray is second value, the first numerical value and the second number in the light path of phase separation layer
The absolute value of the difference of value is greater than 100 nanometers and less than 5000 nanometer.The signal enhancing of fingerprint recognition mould group, not shadow in the present invention
The fingerprint recognition signal strength (S polarized light) for absorbing axis direction along polaroid is rung, and enables to absorb perpendicular to polaroid
The signal of axis direction is remarkably reinforced, and the performance of the enhancing of 210 received signal of fingerprint recognition mould group, fingerprint recognition mould group 210 improves.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (12)
1. a kind of display panel, which is characterized in that the display panel includes fingerprint recognition mould group, the pixel battle array stacked gradually
Column, line polarisation piece, phase separation layer, transparent cover plate；
The light that the fingerprint recognition mould group or the pixel array issue successively passes through the line polarisation piece and the phase
Poor layer；
The absorption axis direction of the line polarisation piece is first direction, and the direction perpendicular to the line polarisation piece is second direction, institute
The optical axis for stating phase separation layer is located at the first direction and second direction institute planar, the light of the phase separation layer
The angle of the absorption axiss of axis and the line polarisation piece is not equal to 0 ° and 90 °；
The polarization state for the linearly polarized light that the line polarisation piece is emitted towards the phase separation layer and the light of the phase separation layer
Axle clamp angle is not equal to 0 ° and 90 °, first ordinary light and the of the linearly polarized light through the phase separation layer with different polarization states
One extraordinary ray, first ordinary light are the first numerical value in the light path of the phase separation layer, and the extraordinary ray is in the phase
The light path of potential difference layer is second value, the absolute value of the difference of first numerical value and the second value be greater than 100 nanometers and
Less than 5000 nanometers.
2. display panel according to claim 1, which is characterized in that the thickness of the phase separation layer be greater than 20 microns and
Less than 60 microns.
3. display panel according to claim 2, which is characterized in that refractive index of the ordinary light in the phase separation layer
Absolute value with the extraordinary ray in the specific refractivity of the phase separation layer is greater than 0.0017 and less than 0.25.
4. display panel according to claim 1, which is characterized in that the display panel further includes being located at the pixel battle array
Quarter-wave plate between column and the line polarisation piece.
5. display panel according to claim 1, which is characterized in that the fingerprint recognition mould group includes,
Optical fingerprint sensor, the optical fingerprint sensor include photosensitive layer, and the photosensitive layer includes multiple photosensitive elements；
Fingerprint recognition light source, the fingerprint recognition light source are located at the pixel array far from the transparent cover plate side；The finger
Line identification mould group is used to be reflected into the fingerprint recognition mould via the finger according to the light that the fingerprint recognition light source issues
The photosensitive element of group carries out fingerprint recognition.
6. display panel according to claim 5, which is characterized in that
The fingerprint recognition light source includes infrared light supply.
7. display panel according to claim 1, which is characterized in that
The pixel array includes thin film transistor array layer and light emitting functional layer；
The light emitting functional layer includes first electrode, luminescent layer and second electrode, and the light that the luminescent layer issues is through the finger
It is reflected into the fingerprint recognition mould group and carries out fingerprint recognition.
8. display panel according to claim 7, which is characterized in that
It further include multiple luminescence units, the luminescence unit includes the first colour light emitting unit, the second colour light emitting unit and the
Three colour light emitting units；The light that the first colour light emitting unit issues is the first color of light, the second colour light emitting unit
The light of sending is the second color of light, and the light that the third colour light emitting unit issues is third color of light；First color of light,
The wavelength of second color of light and the third color of light is respectively λ1、λ2、λ3, wherein λ1< λ2< λ3；
The phase separation layer includes first part, second part and Part III, and the first part is where the luminescent layer
The orthographic projection of plane covers first luminescence unit, and the second part is covered in the orthographic projection of plane where the luminescent layer
Second luminescence unit, the Part III cover the luminous list of the third in the orthographic projection of plane where the luminescent layer
Member；The thickness of the first part, the second part and the Part III is respectively d1、d2、d3, wherein d1< d2< d3。
9. display panel according to claim 8, which is characterized in that
The phase separation layer includes the first face and the second face being oppositely arranged, and first face is the phase separation layer close to described
Transparent cover plate side, second face is uneven whole face or first face is uneven whole face or first face and described second
Face is uneven whole face.
10. display panel according to claim 9, which is characterized in that
It further include bonding between the phase separation layer and the transparent cover plate between the phase separation layer and the line polarisation piece
Layer, the adhesive layer fill first face and the second face out-of-flatness part.
11. display panel according to claim 1, which is characterized in that
The phase separation layer material includes at least one of quartz, calcite, lithium niobate, lithium tantalate or barium metaborate.
12. a kind of display device, which is characterized in that the display device includes described in any one in claim 1 to 11
Display panel.
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