CN107092897A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN107092897A CN107092897A CN201710392424.0A CN201710392424A CN107092897A CN 107092897 A CN107092897 A CN 107092897A CN 201710392424 A CN201710392424 A CN 201710392424A CN 107092897 A CN107092897 A CN 107092897A
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- China
- Prior art keywords
- display panel
- substrate
- fingerprint identification
- identification unit
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Abstract
The embodiment of the invention discloses a kind of display panel and display device.The display panel includes：Array base palte, including first substrate, multiple luminescence units and pixel confining layers；Package substrate, package substrate is provided with least one fingerprint identification unit close to the side of luminescence unit, and the upright projection of fingerprint identification unit on the first substrate is located in the upright projection of pixel confining layers on the first substrate；At least one support column is provided between package substrate and array base palte, the upright projection of support column on the first substrate is located in the upright projection of pixel confining layers on the first substrate；Fingerprint identification unit is h close to the vertical range of the exiting surface on the surface of package substrate to luminescence unit, and support column is H, h ＜ H close to the vertical range of the exiting surface on the surface of package substrate to luminescence unit.The display panel provided using the present embodiment, can improve the screen accounting of display panel, improve the Consumer's Experience of display panel.
Description
Technical field
The present embodiments relate to Display Technique, more particularly to a kind of display panel and display device.
Background technology
It is unique because fingerprint is all come with body for everyone.With the development of science and technology, market
On occur in that a variety of display devices with fingerprint identification function, such as mobile phone, tablet personal computer and intelligent wearable device.This
Sample, user is before display device of the operation with fingerprint identification function, it is only necessary to the fingerprint recognition of finger touch display unit
Unit, it is possible to carry out Authority Verification, simplifies Authority Verification process.
In the existing display device with fingerprint identification function, fingerprint identification unit is often arranged at the non-of display panel
In viewing area.For the display panel of this structure, when carrying out Authority Verification, user needs specially to go to touch the fingerprint recognition
Unit.Undoubtedly, this can influence Consumer's Experience.In addition, fingerprint identification unit is arranged in the non-display area of display panel, reduce
Screen accounting, is disagreed with the development trend on the narrow side of display panel.
The content of the invention
The present invention provides a kind of display panel and display device, to improve the screen accounting of display panel, improves display panel
Consumer's Experience.
In a first aspect, the embodiments of the invention provide a kind of display panel, the display panel includes：
Multiple luminescence units are provided with array base palte, including first substrate, the first substrate and positioned at the hair
Pixel confining layers between light unit；
Package substrate positioned at side of the multiple luminescence unit away from the first substrate, the package substrate is close
The side of the luminescence unit is provided with least one fingerprint identification unit, and the fingerprint identification unit is on the first substrate
Upright projection be located at pixel confining layers in the upright projection on the first substrate；
Wherein, at least one support column is provided between the package substrate and the array base palte, the support column exists
Upright projection on the first substrate is located at the pixel confining layers in the upright projection on the first substrate；It is described to refer to
Vertical range of the line recognition unit close to the surface of the package substrate to the exiting surface of the luminescence unit is h, the support
Vertical range of the post close to the surface of the package substrate to the exiting surface of the luminescence unit is H, h ＜ H.
Second aspect, the embodiment of the present invention additionally provides a kind of display device, and the display device includes the embodiment of the present invention
Any one display panel provided.
The embodiment of the present invention sets described by the way that fingerprint identification unit is arranged on the package substrate of display panel
Upright projection of the fingerprint identification unit on the first substrate is located at the pixel confining layers hanging down on the first substrate
Deliver directly in shadow so that fingerprint identification unit can be arranged in the viewing area of display panel, improve the screen accounting of display panel,
Meet the development trend on the narrow side of display panel.In addition, setting fingerprint identification unit close to the surface of the package substrate to institute
The vertical range h for stating the exiting surface of luminescence unit is less than the support column close to the surface of the package substrate to the luminous list
The vertical range H of the exiting surface of member, can increase the maximum rising angle ψ of display panel, increase the maximum visual of display panel
Angle, improves Consumer's Experience.
Brief description of the drawings
Fig. 1 a are a kind of cross-sectional view of display panel provided in an embodiment of the present invention；
Light path schematic diagram when Fig. 1 b show for display panel in Fig. 1 a；
Fig. 2 is the cross-sectional view of another display panel provided in an embodiment of the present invention；
Fig. 3 is the cross-sectional view of another display panel provided in an embodiment of the present invention；
Fig. 4 is the cross-sectional view of another display panel provided in an embodiment of the present invention；
Fig. 5 is the cross-sectional view of another display panel provided in an embodiment of the present invention；
Fig. 6 is the area S1 and display surface for the open region that display panel E and display panel F are not blocked by fingerprint identification unit
The total open region area S of plate ratio and φ variation relation figure
Fig. 7 is the fundamental diagram that a kind of fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition；
Fig. 8 is the fundamental diagram that another fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition；
Fig. 9 is the fundamental diagram that another fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition；
Figure 10 a are a kind of electrical block diagrams of fingerprint identification unit provided in an embodiment of the present invention；
Figure 10 b are a kind of film layer structure schematic diagrames of fingerprint identification unit provided in an embodiment of the present invention；
Figure 11 is a kind of structural representation of display device provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Everyone including the skin lines including fingerprint on pattern, breakpoint and crosspoint it is different, present uniqueness
And it is constant throughout one's life.Accordingly, we can be mapped a people with his fingerprint, by by his fingerprint and pre-saving
Finger print data is compared, to verify his true identity, here it is fingerprint identification technology.Have benefited from electronics Integrated-manufacturing Techniques
With it is quick and optical finger print identification technology has begun to enter into our daily life in reliable algorithm research, fingerprint identification technology
It is living, it is most deep as being studied in current biological detection, it is most widely used, develop most ripe technology.Optical finger print recognizes skill
The operation principle of art is that the light that light source is sent in display panel is irradiated in touch main body (such as finger), handles digital reflex shape
Into reflected light, the reflected light formed (i.e. fingerprint signal light) is transmitted into fingerprint identification unit, and fingerprint identification unit is to incidence
It is acquired to optical signal thereon.Due to there is specific lines on fingerprint, intensity of reflected light is formed in finger position
Difference, finally make it that the optical signal that each fingerprint identification unit is collected is different, user real identification can be determined accordingly.
Fig. 1 a are a kind of cross-sectional view of display panel provided in an embodiment of the present invention.Referring to Fig. 1 a, the display
Panel includes：Array base palte 10, package substrate 20 and at least one being arranged between package substrate 20 and array base palte 10
Support column 30.Multiple luminescence units 11 are provided with array base palte 10, including first substrate 13, first substrate 13 and positioned at hair
Pixel confining layers 12 between light unit 11.Package substrate 20 is arranged at one of multiple luminescence units 11 away from first substrate 13
Side.Package substrate 20 is provided with least one fingerprint identification unit 31, fingerprint identification unit 31 close to the side of luminescence unit 11
Upright projection on first substrate 13 is located at pixel confining layers 12 in the upright projection on first substrate 13.Support column 30 exists
Upright projection on first substrate 13 is located at pixel confining layers 12 in the upright projection on first substrate 13.Fingerprint identification unit
31 vertical range close to the surface of package substrate 20 to the exiting surface of luminescence unit 11 is h, and support column 30 is close to package substrate
20 surface to the vertical range of the exiting surface of luminescence unit 11 is H, h ＜ H.
Above-mentioned technical proposal is by the way that fingerprint identification unit is arranged on the package substrate 20 of display panel, and setting refers to
Upright projection of the line recognition unit 31 on first substrate 13 is located at upright projection of the pixel confining layers 12 on first substrate 13
It is interior so that fingerprint identification unit can be arranged in the viewing area of display panel, the screen accounting of display panel is improved, complies with aobvious
Show the development trend on the narrow side of panel.
It should be noted that luminescence unit 11 can include (not showed that in Fig. 1 a) such as anode, luminescent layer and negative electrodes.Hair
Photosphere is arranged between anode and negative electrode, and anode, luminescent layer and negative electrode are collectively forming sandwich structure.The glow color of luminescent layer
Red, green and blueness etc. can be included.
Also being made on first substrate 13 in display panel has for driving the luminous drive circuit of luminescence unit 11 (in Fig. 1 a
Do not show that) etc. structure, the one side of pixel confining layers 12 be used for cover the structures such as drive circuit play planarization first substrate 13
Effect, on the other hand for limiting the light-emitting zone and non-luminous region of array base palte 10, that is, limit each luminescence unit
11.The open region of pixel confining layers 50 is the light-emitting zone of array base palte 10, and non-open region is the non-light-emitting area of array base palte 10
Domain.
The effect of support column 30 mainly has two, and one is, when forming the film layer such as anode and luminescent layer, to support mask plate.
Two be to form display panel rear support package substrate 20, to protect display panel internal components.
Light path schematic diagram when Fig. 1 b show for display panel in Fig. 1 a.Referring to Fig. 1 b, because fingerprint identification unit 31 is carried on the back
Surface from package substrate 20 is light tight, and the light that luminescence unit 11 is sent is irradiated to fingerprint identification unit 31 away from package substrate
Behind 20 surface, it can be blocked by fingerprint identification unit 31 away from the surface of package substrate 20, it is impossible to received by eyes of user.This
When can cause the display panel to show, user is different with respect to the position of display panel, the display of the display panel observed by user
Effect is different.When user is located at G positions, user can be clearly observed all the elements shown on display panel, and it can
It was observed that open region scope be S.When user is located at location A, because fingerprint identification unit 31 can shield portions light, use
The scope of the observable open region in family is S1, and because S1 is less than S, user can only observe that the part that display panel is shown is drawn
Face.When user is located at B location, the light of the edge outgoing of the luminescence unit 11 of the fingerprint identification unit 31 of arest neighbors, just
Pass through from the edge of fingerprint identification unit 31, and be injected into user's eye so that user can be clearly observed display just
The all the elements shown on panel, the scope of its observable open region is S.
Accordingly, referring to Fig. 1 a, define arest neighbors fingerprint identification unit 31 luminescence unit 11 edge outgoing it is lucky
The light and the angle of the vertical line of the exiting surface of display panel passed through from the edge of fingerprint identification unit 31 is first angle θ.Hair
The edge of light unit 11 is final from package substrate after each film layer refraction in display panel with the light of first angle θ outgoing
20 outgoing, the angle from the emergent light of the outgoing of package substrate 20 and the vertical line of the exiting surface of display panel is maximum rising angle ψ.
The maximum rising angle ψ of obvious display panel size depends on first angle θ size.Research shows that display panel is most
Big rising angle ψ increases with first angle θ increase.
When defining user's observation display panel, the angle of the vertical line of the exiting surface of user's sight and display panel is visual angle.
When the visual angle of user is more than the maximum rising angle ψ of display panel, user can only observe that the part that display panel is shown is drawn
Face.When the visual angle of user is less than or equal to the maximum rising angle ψ of display panel, user can be clearly observed display surface
The all the elements shown on plate.The visual angle that size is equal to maximum rising angle ψ is maximum visual angle.
The fingerprint identification unit 31 is made to be close to the surface of package substrate 20 to the vertical range of the exiting surface of luminescence unit 11
H, the thickness of fingerprint identification unit 31 is h0, the water at the edge of the edge of fingerprint identification unit 31 and the luminescence unit 11 of arest neighbors
Flat distance is d.If the horizontal range d at the edge of the edge of fingerprint identification unit 31 and the luminescence unit 11 of arest neighbors is definite value,
The thickness h of fingerprint identification unit 310For definite value, then have
From above formula, fingerprint identification unit 31 is hung down close to the exiting surface on the surface of package substrate 20 to luminescence unit 11
Straight distance is smaller for h, and first angle θ is bigger, and the maximum rising angle ψ of display panel is bigger.H ＜ H are set, raising can be reached
The maximum rising angle of display panel, increases the maximum visual angle of display panel, improves the purpose of Consumer's Experience.
It should be noted that in the above-mentioned technical solutions, exemplarily setting, exiting surface and the pixel of luminescence unit 11 are limited
Given layer 12 is in the same plane away from the surface of first substrate 13, and this is only the specific example of the present invention, rather than to this
The limitation of invention, when specifically setting, the exiting surface and pixel confining layers 12 that can also set luminescence unit 11 deviate from first substrate
13 surface is located in Different Plane.
Fig. 2 is the structural representation of another display panel provided in an embodiment of the present invention.Referring to Fig. 2, the display panel
In, package substrate 20 is transparent rigid cover plate；Package substrate 20 is provided with connection routing layer 21 close to the side of array base palte 10,
Connecting routing layer 21 includes a plurality of connection cabling (not shown in Fig. 2), and connection cabling is electrically connected with fingerprint identification unit 31；Connection
Routing layer 21 is provided with planarization layer 22 close to the side of array base palte 10, and fingerprint identification unit 31 is arranged at planarization layer 22 and leaned on
The side of nearly array base palte 10.Here connection cabling is set to be electrically connected with fingerprint identification unit 31, for for fingerprint identification unit
31 provide control signal, and carry out fingerprint recognition according to the output signal of fingerprint identification unit 31.Planarization layer 22 is set
Purpose is, for covering connection routing layer 21, to play a part of planarized package substrate 20.The material of planarization layer 22 can be
Organic material.In specific set, air or nitrogen are filled with space that can be between package substrate 20 and array base palte 10
Gas.Space of the light of the exiting surface outgoing of luminescence unit 11 through package substrate 20 and array base palte 10, planarization layer 22,
It is injected into air, in light communication process, can be obtained according to the law of refraction after connection routing layer 21 and package substrate 20：
n1Sin θ=n2Sin α=n3Sin β=n4Sin γ=n1sinψ；
Wherein, n1For the refractive index of air, n2For the refractive index of planarization layer 22, n3To connect the refractive index of routing layer 21,
n4For the refractive index of transparent rigid cover plate；θ is first angle, and α is propagation angle of the light in planarization layer 22, and β is light
Propagation angle in connection routing layer 21, γ is propagation angle of the light in transparent rigid cover plate.Wherein, propagation angle is
The angle of the vertical line of each film layer of finger light Yu display panel.
It can be obtained by above-mentioned formula,
θ=ψ,
That is, when display panel is right up to maximum rising angle ψ,
Accordingly, it can set
Wherein, d for fingerprint identification unit 31 edge and arest neighbors luminescence unit 11 edge horizontal range, h0For
The thickness of fingerprint identification unit 31, ψ is the maximum rising angle of display panel, wherein ψ >=50 °.The benefit so set is, can
To weaken the influence of rising angle when fingerprint identification unit 31 is shown to display panel, and then cause display panel has larger
Visible angle, improves the display effect of display panel.
It is to meet user to the basic of display panel visual angle it should be noted that setting ψ >=50 ° in the present embodiment
Demand so that user is from can laterally be clearly observed all the elements for being shown on display panel., can be with specific set
According to demand of the user to display panel visual angle, ψ is set greater than or equal to 60 degree, 70 degree etc., specific limit is not done herein
It is fixed.
In specific set, in the case where meeting condition h ＜ H, the method to set up of fingerprint identification unit 31 has a variety of.Below with regard to allusion quotation
Type example is described in detail, but listed example is designed solely for the purpose of illustration the present invention, is not the limit to the present invention
It is fixed.
With continued reference to Fig. 2, alternatively, in the display panel, planarization layer 22 is set on the surface of array base palte 10
There is at least one projection 32, fingerprint identification unit 31 is arranged at projection 32 close to the surface of array base palte 10.Make h1For projection 32
In the height where display panel on the direction of plane, then there is h=H-h1＜ H.Display surface can be improved by so setting
The maximum rising angle of plate, increases the maximum visual angle of display panel, improves Consumer's Experience.Wherein, the height h of projection 321More
Greatly, h is smaller, and the maximum rising angle ψ of display panel is bigger, and the maximum visual angle of display panel is bigger, the display of display panel
Effect is better.
It should be noted that the material of the projection 32 can be identical with the material of planarization layer 22, can also be with planarization
The material of layer 22 is differed.If the material of the projection 32 is identical with the material of planarization layer 22, the projection 32 can pass through bonding
Mode fit on planarization layer 22, can also be structure as a whole, be formed by patterning process with planarization layer 22.
Fig. 3 is the structural representation of another display panel provided in an embodiment of the present invention.Referring to Fig. 3, the display panel
In, planarization layer 22 is provided with least one groove 33 close to the side of array base palte 10, and support column 30 is embedded into groove 33.
Make h2It is groove 33 in the depth where display panel on the direction of plane, then has h=H-h2＜ H.So setting can be with
The maximum rising angle of display panel is improved, increases the maximum visual angle of display panel, improves Consumer's Experience.Wherein, groove 33
Depth h2Bigger, the maximum rising angle ψ of display panel is bigger, and the maximum visual angle of display panel is bigger, display panel
Display effect is better.
Fig. 4 is the structural representation of another display panel provided in an embodiment of the present invention.With the display surface provided in Fig. 3
Plate is compared, in the display panel provided in Fig. 4, and groove 33 runs through planarization layer 22.The benefit so set is can to cause h
Maximum is reached with H difference, the maximum rising angle of display panel is further improved, increases the maximum visual angle of display panel,
Improve Consumer's Experience.
Fig. 5 is a kind of plan structure exemplary plot of display panel provided in an embodiment of the present invention.Referring to Fig. 5, in the display
In panel, luminescence unit 11 is arranged in matrix structure；Projection of the fingerprint identification unit 31 on first substrate 13 is located at column direction
Region in (Y direction in Fig. 5) between adjacent light-emitting units 11 is in the upright projection on first substrate 13, and support column 30 exists
Region of the projection between adjacent light-emitting units 11 on line direction (X-direction in Fig. 5) on first substrate 13 is in the first base
In upright projection on plate 13.The benefit so set is, the setting of rational deployment fingerprint identification unit 31 and support column 30
Position so that fingerprint identification unit 31 and support column 30 will not mutually tie up installation space, reduces the manufacture difficulty of display panel.
Similarly, projection of the fingerprint identification unit 31 on first substrate 13 can also be set to be located at adjacent hair on line direction
Region between light unit 11 is in the upright projection on first substrate 13, and projection of the support column 30 on first substrate 13 is located at
Region on column direction between adjacent light-emitting units 11 is in the upright projection on first substrate 13.So setting can equally reach
To rational deployment fingerprint identification unit 31 and the set location of support column 30 so that fingerprint identification unit 31 and support column 30 are not
Installation space can be mutually tied up, the purpose of the manufacture difficulty of display panel is reduced.
It is φ to make user's observation visual angle, and Fig. 6 is display panel E and display panel F not by opening that fingerprint identification unit is blocked
The area S1 and the total open region area S of display panel of mouth region ratio and φ variation relation figure.Wherein, display panel E is cutd open
Face structure chart is consistent with Fig. 4, and overlooking structure figure is consistent with Fig. 5, and in the display panel, fingerprint identification unit 31 is in column direction
Width m in (Y direction in Fig. 5) is 20 μm, the edge of the edge of fingerprint identification unit 31 and the luminescence unit 11 of arest neighbors
Horizontal range d be 3 μm, length p of the luminescence unit 11 on column direction (Y direction in Fig. 5) be 40 μm, luminescence unit 11 exists
Length q on line direction (X-direction in Fig. 5) is 10 μm.Planarization layer 22 is provided through close to the side of array base palte 10
The groove 33 of planarization layer 22, the depth h of groove 332For 2 μm, support column 30 is close to the surface of package substrate 20 to luminescence unit
The vertical range H of 11 exiting surface is 4.5 μm, and fingerprint identification unit 31 is close to the surface of package substrate 20 to luminescence unit 11
The vertical range h of exiting surface is 2.5 μm.Compared with display panel E, groove 33 is not provided with display panel F on planarization layer 22,
Vertical range H of the support column 30 close to the surface of package substrate 20 to the exiting surface of luminescence unit 11 is leaned on fingerprint identification unit 31
The vertical range h of exiting surface of the surface of nearly package substrate 20 to luminescence unit 11 is equal, is 4.5 μm.Referring to Fig. 6, display
Panel E maximum visual angle is 50 °, and display panel F is about 33 °.The studies above result illustrates to set h ＜ H to carry again
The maximum rising angle of high display panel, increases the maximum visual angle of display panel, improves Consumer's Experience.
Fig. 7 is the fundamental diagram that a kind of fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition.It is optional
, as shown in fig. 7, luminescence unit 11 can provide light source for fingerprint identification unit 31；The light that luminescence unit 11 is sent via
Formation reflected light after main body 40 reflects is touched to incide fingerprint identification unit 31 to carry out fingerprint recognition.In this way, need not be
Fingerprint identification unit 31 sets extra light source, reduces the thickness of display panel and the processing step of display panel.
Fig. 8 is the fundamental diagram that another fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition.Can
Choosing, as shown in figure 8, fingerprint identification unit 31 also includes being integrated in the fingerprint recognition light source 34 inside fingerprint identification unit 31；
The light that fingerprint recognition light source 34 is sent incides fingerprint identification unit 31 via formation reflected light after main body 40 reflects is touched, with
Carry out fingerprint recognition.
Fig. 9 is the fundamental diagram that another fingerprint identification unit provided in an embodiment of the present invention carries out fingerprint recognition.Can
Choosing, as shown in figure 9, display panel also includes, fingerprint recognition light source 34, it is remote that fingerprint recognition light source 34 is located at luminescence unit 11
The side of fingerprint identification unit 31；The light that fingerprint recognition light source 34 is sent enters via formation reflected light after main body 40 reflects is touched
Fingerprint identification unit 31 is mapped to, to carry out fingerprint recognition.During specific setting, fingerprint recognition light source 34 can be area source or collimation
Light source (exemplarily sets fingerprint recognition light source 34 to be area source) in Fig. 9., can using collimated light source compared with using area source
To weaken crosstalk of the light reflected to form through user's finger fingerprint between different fingerprint identification units 31, fingerprint recognition is improved
Precision.But it is due to that collimated light source is often bigger than area source thickness, the thickness of display panel can be increased using collimated light source.
Figure 10 a are a kind of electrical block diagrams of fingerprint identification unit provided in an embodiment of the present invention, and Figure 10 b are this hairs
The film layer structure schematic diagram for a kind of fingerprint identification unit that bright embodiment is provided, with reference to Figure 10 a and Figure 10 b, fingerprint identification unit
Photodiode D, storage capacitance C and thin film transistor (TFT) T can be included.The of photodiode D positive pole D1 and storage capacitance C
One electrode is electrically connected, and negative pole D2 is electrically connected with storage capacitance C second electrode and thin film transistor (TFT) T source electrode Ts；Film is brilliant
Body pipe T grid Tg is electrically connected with thread switching control Gate, and thin film transistor (TFT) T drain electrode Td is electrically connected with signal wire Data.Light
Quick diode D is used to the light for touching main body reflection being converted into current signal.
Specifically, photodiode D also includes the PIN junction D3 being located between positive pole D1 and negative pole D2.Wherein, negative pole D2 by
Light tight metal is formed, and PIN junction D3 border of the border no more than negative pole D2.Photodiode D positive pole D1 is saved positioned at PIN
Sides of the D3 away from array base palte 10.PIN junction D3 has light sensitive characteristic, and with unilateral conduction.During no light, PIN junction
D3 has the saturation reverse leakage current of very little, i.e. dark current, and now photodiode D ends.When by illumination, PIN junction D3's
Saturation reverse leakage current is greatly increased, and forms photoelectric current, and photoelectric current changes with the change of incident intensity.
Exemplarily, fingerprint recognition principle is described in detail with reference to Fig. 9, Figure 10 a and Figure 10 b.In fingerprint recognition rank
Section, node H1 inputs low voltage signal (constant voltage signal that such as size is -5V), signal wire Data high input voltage signals
(constant voltage signal that such as size is 1.5V).The whole fingerprint recognition stage includes preparatory stage, fingerprint signal acquisition phase
With fingerprint signal detection-phase.Driving chip (Fig. 9, Figure 10 a and Figure 10 b electrically connected in preparatory stage, fingerprint identification unit 31
Not shown in) control the thin film transistor (TFT) T of fingerprint identification unit 31 to turn on by thread switching control Gate, storage capacitance C chargings,
Until storage capacitance C charging completes.In fingerprint signal acquisition phase, fingerprint identification unit 31 is controlled using thread switching control Gate
Thin film transistor (TFT) T close.When user by finger press on a display panel, the light irradiation that luminescence unit 11 is sent to finger
On, and reflect to form reflected light on the surface of finger print.The reflected light reflected to form through finger print incides fingerprint recognition
In unit 31, received by the photodiode D of fingerprint identification unit 31, and form photoelectric current, the direction of the photoelectric current is by saving
Point H2 points to node H1, and then H2 current potential is changed., can directly detection node H2 in fingerprint signal detection-phase
Potential change amount, and then determine photoelectric current size.
Alternatively, in fingerprint signal detection-phase, fingerprint identification unit 31 can also be controlled using thread switching control Gate
Thin film transistor (TFT) T open, now there is potential difference between the electrodes of storage capacitance C two, storage capacitance C is in charged state, lead to
The quantity of electric charge that detection storage capacitance C is filled with is crossed, and then determines the size of photoelectric current.
With continued reference to Fig. 9, because the ridge 41 being pressed against in the finger print of display panel is contacted with panel surface, paddy
42 do not contact with panel surface, cause light be irradiated to fingerprint paddy 42 it is different with the reflectivity on ridge 41, and then cause
The reflected light formed at the position of ridge 41 and the reflected light formed at the position of paddy 42 that fingerprint identification unit 31 is received
Intensity it is different so that the reflected light formed by the position in ridge 41 and the reflected light formed at the position of paddy 42 are converted into
Photoelectric current is of different sizes.Fingerprint recognition can be carried out according to photoelectric current size.
The embodiment of the present invention additionally provides a kind of display device.Figure 11 is a kind of display device provided in an embodiment of the present invention
Structural representation.Referring to Figure 11, display device 101 includes any one display panel 201 provided in an embodiment of the present invention.It is aobvious
Showing device 101 is specifically as follows mobile phone, tablet personal computer and intelligent wearable device etc..
Display device provided in an embodiment of the present invention, by the package substrate that fingerprint identification unit is arranged to display panel
On, and set upright projection of the fingerprint identification unit on the first substrate to be located at the pixel confining layers described
In upright projection on first substrate so that fingerprint identification unit can be arranged in the viewing area of display panel, improve aobvious
Show the screen accounting of panel, meet the development trend on the narrow side of display panel.In addition, setting fingerprint identification unit close to the encapsulation
The surface of substrate to the exiting surface of the luminescence unit vertical range h be less than the support column close to the package substrate table
Face to the exiting surface of the luminescence unit vertical range H so that improve display panel maximum rising angle, increase display surface
The maximum visual angle of plate, improves Consumer's Experience.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment here, can carry out for a person skilled in the art it is various it is obvious change, again
Adjust, be combined with each other and substitute without departing from protection scope of the present invention.Therefore, although by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, is not departing from the situation of present inventive concept
Under, other more equivalent embodiments can also be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (13)
1. a kind of display panel, it is characterised in that including：
Multiple luminescence units are provided with array base palte, including first substrate, the first substrate and positioned at the luminous list
Pixel confining layers between member；
Package substrate positioned at side of the multiple luminescence unit away from the first substrate, the package substrate is close to described
The side of luminescence unit is provided with least one fingerprint identification unit, the fingerprint identification unit hanging down on the first substrate
Deliver directly shadow and be located at the pixel confining layers in the upright projection on the first substrate；
Wherein, at least one support column is provided between the package substrate and the array base palte, the support column is described
Upright projection on first substrate is located at the pixel confining layers in the upright projection on the first substrate；The fingerprint is known
The vertical range of exiting surface of the other unit close to the surface of the package substrate to the luminescence unit is h, and the support column is leaned on
The vertical range of exiting surface of the surface of the nearly package substrate to the luminescence unit is H, h ＜ H.
2. display panel according to claim 1, it is characterised in that：
The package substrate is transparent rigid cover plate；
The package substrate is provided with connection routing layer close to the side of the array base palte, and the connection routing layer includes a plurality of
Cabling is connected, the connection cabling is electrically connected with the fingerprint identification unit；
The connection routing layer is provided with planarization layer close to the side of the array base palte, and the fingerprint identification unit is arranged at
The planarization layer is close to the side of the array base palte.
3. display panel according to claim 2, it is characterised in that
<mrow>
<mi>h</mi>
<mo>&le;</mo>
<mfrac>
<mi>d</mi>
<mrow>
<mi>t</mi>
<mi>a</mi>
<mi>n</mi>
<mi>&psi;</mi>
</mrow>
</mfrac>
<mo>+</mo>
<msub>
<mi>h</mi>
<mn>0</mn>
</msub>
<mo>,</mo>
</mrow>
Wherein, d for the fingerprint identification unit edge and arest neighbors the luminescence unit edge horizontal range, h0For
The thickness of the fingerprint identification unit, ψ is the maximum rising angle of the display panel, wherein ψ >=50 °.
4. display panel according to claim 2, it is characterised in that：
The planarization layer is provided with least one projection on the surface of the array base palte, and the fingerprint identification unit is set
It is placed in the raised surface close to the array base palte.
5. display panel according to claim 2, it is characterised in that：
The planarization layer is provided with least one groove close to the side of the array base palte, and the support column is embedded into described
In groove.
6. display panel according to claim 5, it is characterised in that：
The groove runs through the planarization layer.
7. the display panel according to claim any one of 1-6, it is characterised in that：
The luminescence unit is arranged in matrix structure；
Projection of the fingerprint identification unit on the first substrate is located on column direction between the adjacent luminescence unit
Region is in the upright projection on the first substrate, and projection of the support column on the first substrate is located on line direction
Region between the adjacent luminescence unit is in the upright projection on the first substrate；Or,
Projection of the fingerprint identification unit on the first substrate is located on line direction between the adjacent luminescence unit
Region is in the upright projection on the first substrate, and projection of the support column on the first substrate is located on column direction
Region between the adjacent luminescence unit is in the upright projection on the first substrate.
8. the display panel according to claim any one of 1-6, it is characterised in that
The luminescence unit provides light source for the fingerprint identification unit；
The light that the luminescence unit is sent incides the fingerprint identification unit via formation reflected light after main body reflection is touched,
To carry out fingerprint recognition.
9. the display panel according to claim any one of 1-6, it is characterised in that the fingerprint identification unit also includes collection
Fingerprint recognition light source described in Cheng Yu inside fingerprint identification unit；
The light that the fingerprint recognition light source is sent incides the fingerprint recognition via formation reflected light after main body reflection is touched
Unit, to carry out fingerprint recognition.
10. the display panel according to claim any one of 1-6, it is characterised in that also include：
Fingerprint recognition light source, the fingerprint recognition light source is located at side of the luminescence unit away from the fingerprint identification unit；
The light that the fingerprint recognition light source is sent incides the fingerprint recognition via formation reflected light after main body reflection is touched
Unit, to carry out fingerprint recognition.
11. display panel according to claim 10, it is characterised in that
The fingerprint recognition light source is area source or collimated light source.
12. the display panel according to claim any one of 1-6, it is characterised in that the fingerprint identification unit includes light
Quick diode, storage capacitance and thin film transistor (TFT)；
The positive pole of the photodiode is electrically connected with the first electrode of the storage capacitance, the negative pole of the photodiode with
The source electrode electrical connection of the second electrode of the storage capacitance and the thin film transistor (TFT)；The grid of the thin film transistor (TFT) is with opening
Control line electrical connection is closed, the grid drain electrode of the thin film transistor (TFT) is electrically connected with signal wire；
The photodiode is used to the optical signal for touching main body reflection being converted into current signal.
13. a kind of display device, it is characterised in that including the display panel described in claim any one of 1-12.
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| CN201710392424.0A CN107092897B (en) | 2017-05-27 | 2017-05-27 | Display panel and display device |
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