CN108898955A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
- Publication number
- CN108898955A CN108898955A CN201810856106.XA CN201810856106A CN108898955A CN 108898955 A CN108898955 A CN 108898955A CN 201810856106 A CN201810856106 A CN 201810856106A CN 108898955 A CN108898955 A CN 108898955A
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- Prior art keywords
- signal line
- display panel
- area
- fingerprint identification
- pixel drive
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
Abstract
The embodiment of the invention provides a kind of display panel and display devices, inorganic insulation layer is removed by the transparent area to fingerprint identification area in display panel, only retain organic planarization layer, it is intended to increase the light transmittance of fingerprint identification area, the accuracy and sensitivity of light sensation fingerprint recognition is promoted, while the bending resistance of display panel can also be promoted.
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】
For the display panel with fingerprint identification function, in order to preferably realize screen design comprehensively, fingerprint is avoided
Identification region occupies the space of non-display area, and the lower fingerprint technique of screen can be used at present by viewing area and be multiplexed with fingerprint identification region.
When viewing area is multiplexed with fingerprint identification region, is corresponded in display panel and be additionally provided with multiple fingers at the position of fingerprint identification region
Line recognition unit, when carrying out fingerprint recognition, the light that light source issues is reflected via finger, injects the fingerprint recognition of specific region
In unit, fingerprint identification unit so that according to the received reflection light of institute to the identification of the paddy coning row of the corresponding fingerprint in the region.
But conventionally, as in the driving unit of display panel each film layer and other component setting compared with
To be uniform, so that the transmission region accounting on display panel is not high, to influence the outgoing of light and enter to meeting shadow
Ring the sensitivity of light sensation fingerprint recognition.
【Summary of the invention】
In view of this, the embodiment of the invention provides a kind of display panel and display device, by display panel middle finger
Inorganic insulation layer is removed by the transparent area of line cog region, only retains organic planarization layer, it is intended to increase fingerprint identification area
Light transmittance, promotes the accuracy and sensitivity of light sensation fingerprint recognition, while can also promote the bending resistance of display panel.
The embodiment of the invention provides a kind of display panel, which includes viewing area, and the viewing area includes referring to
Line cog region and non-fingerprint identification area,
The first organic planarization layer is correspondingly arranged in the non-fingerprint identification area；In the transparent area of the fingerprint identification area
Domain is correspondingly arranged on the second organic planarization layer；Wherein, the thickness of the second organic planarization layer is greater than first organic planarization
Change layer；
It is correspondingly arranged on light sensation fingerprint identification module in the fingerprint identification area, the light sensation fingerprint identification module deviates from institute
State the light emission side setting of viewing area.
Wherein, the first inorganic insulation layer is also correspondingly arranged in the non-fingerprint identification area；In the fingerprint identification area
Inorganic insulation layer is not provided in transmission region.
Preferably, the thickness difference of the second organic planarization layer and the first organic planarization layer is about described first
The thickness of inorganic insulation layer.
Preferably, multiple first pixel drive units are correspondingly arranged in the non-fingerprint identification area, each described first
Pixel drive unit has the first area；Multiple second pixel drive units are correspondingly arranged in the fingerprint identification area, each
Second pixel drive unit has second area；First area is greater than the second area.
Preferably, first pixel drive unit includes the first storage capacitance；Second pixel drive unit includes
Second storage capacitance；Wherein, the area of second storage capacitance is 0.5~0.8 times of the area of first storage capacitance.
Preferably, first pixel drive unit includes the first driving transistor；The second pixel drive unit packet
Include the second driving transistor；Wherein, the area of the second driving transistor is the 0.5 of the area of the first driving transistor
~0.8 times；And the breadth length ratio of the first driving transistor and the breadth length ratio of the second driving transistor are about the same.
It preferably, further include being provided with to first pixel drive unit to provide enabled letter in the non-fingerprint identification area
Number the first signal wire；It is still provided in the fingerprint identification area to second pixel drive unit and enable signal is provided
Second signal line；Wherein, the width of the second signal line is 0.5~0.8 times of the width of first signal wire.
Preferably, second pixel drive unit is not provided in the transmission region of the fingerprint identification area；Described
The second signal line is only set in the transmission region of fingerprint identification area；The transmission region drives with corresponding second pixel
Moving cell is disposed adjacent.
Preferably, the second signal line includes providing the scanning of scanning drive signal to second pixel drive unit
Signal wire；The second signal line further includes that the light emitting control letter of LED control signal is provided to second pixel drive unit
Number line；The second signal line further includes providing the reseting signal line of reset reference signal to second pixel drive unit；
The transmission region is defined by the reseting signal line and the LED control signal line；Wherein, the scan signal line and
The reseting signal line is arranged in parallel, and is formed by different metal pattern layers.
Preferably, the scan signal line and the LED control signal line are arranged in parallel, and by identical metal
Pattern layers are formed；The underlay substrate of the LED control signal line and/or the reseting signal line and the display panel it
Between be provided only with the second organic planarization layer.
Preferably, the second signal line includes providing the data of data voltage signal to second pixel drive unit
Signal wire；The second signal line further includes providing the first constant electricity of constant potential signal to second pixel drive unit
Press signal wire；The light transmission is defined by two adjacent data signal lines and/or the first constant voltage signal line
Region；
Wherein, the data signal line and the first constant voltage signal line are arranged in parallel, by same metal layer
Patterning is formed；
Between the data signal line and/or the first constant voltage signal line and the underlay substrate of the display panel
It is provided only with the second organic planarization layer.
Preferably, the display panel further includes light sensation fingerprint identification module, and the light sensation fingerprint identification module includes light
Line sensing unit, recognition unit and feedback unit；Wherein, the light sensing unit is for incuding the light received；It is described
Recognition unit is used for the light received according to the light sensing unit, identifies the valley and a ridge of fingerprint；The feedback unit is used
Driving chip is fed back in the fingerprint results for identifying the recognition unit.
Preferably, the light sensing unit and the transmission region of the fingerprint identification area are correspondingly arranged.
Preferably, the display panel further includes bent area, and the fingerprint identification area is set in the bent area.
On the other hand, the embodiment of the invention provides a kind of display device, the display device includes above-mentioned display panel.
A kind of light emitting display panel provided in an embodiment of the present invention and display device, by fingerprint recognition in display panel
Inorganic insulation layer is removed by the transparent area in area, only retains organic planarization layer, on the one hand can promote the light transmission of transparent area
Rate, increases entrance and the exit dose of light, to promote the sensitivity of entire light sensation fingerprint identification module.In addition, passing through removal
The biggish inorganic insulation layer of inherent strain fills organic planarization layer, the buckle resistance of transparent area is enabled to reach promotion, so as to
To realize the folder function of flexible display panels.In embodiments of the present invention by fingerprint identification area by pixel drive unit
Compact design is carried out, is to reduce the area accounting of driving unit specifically, to vacate transparent area, and by transparent area
The removal of inorganic insulation film layer, only retains high transparency and the higher organic planarization layer of toughness, while promoting light transmittance
Also buckle resistance is improved.So that the flexible display panels may be implemented for light sensation fingerprint mould group to be arranged in bent area.
【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 is the structural schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 2 is another schematic diagram of display panel in Fig. 1；
Fig. 3 is the another schematic diagram of display panel in Fig. 1；
Fig. 4 is the structural schematic diagram of pixel drive unit in Fig. 3；
Fig. 5 is the schematic cross-section for prolonging the direction AA ' and the direction BB ' along Fig. 4；
Fig. 6 A is the structural schematic diagram of another display panel provided by the embodiment of the present invention；
Fig. 6 B is the schematic cross-section for prolonging the direction CC ' along Fig. 6 A；
Fig. 7 is the structural schematic diagram of display panel provided by further embodiment of this invention；
Fig. 8 is the schematic diagram of 1 course of work of light sensation fingerprint identification unit provided in this embodiment；
Fig. 9 is the another schematic diagram of display panel in Fig. 1；
Figure 10 be in Fig. 9 display panel in a kind of schematic diagram of bending state；
Figure 11 be in Fig. 9 display panel in the schematic diagram of another bending state；
Figure 12 is the structural schematic diagram of display device provided by 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, exists 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 in embodiments of the present invention signal may be described using term first, second, third, etc.
Line, but these signal wires should not necessarily be limited by these terms.These terms are only used to for signal wire being distinguished from each other out.For example, not taking off
In the case where from range of embodiment of the invention, the first signal wire can also be referred to as second signal line, similarly, the first signal wire
The first signal wire can also be referred to as.
Inventor has light sensation fingerprint identification function for the problems of the prior art by careful further investigation
Display panel light transmittance it is lower the problems such as, specifically, inorganic insulation layer and have in the transmission region of fingerprint identification area
Machine planarization layer be all it is simultaneous, hence for being affected for light transmittance.In addition, for flexible foldable display panel
For, how to integrate light sensation fingerprint identification function and is increasingly becoming one important topic of display field.In order to integrate light sensation fingerprint
Identification function and bending function provide a kind of display panel in the embodiment of the present invention, by by fingerprint identification area and bending
The compound setting in area fingerprint recognition mould group is arranged in bent area, by the compact design of pixel drive unit, thus shape
At larger area transmission region, and only have metal routing in the transmission region, on the basis of guaranteeing has higher light transmittance,
So as to which the biggish inorganic insulation layer of stress to be removed, so as to promote the bending resistance of bent area
As shown in Fig. 1~Figure 11, wherein Fig. 1 is the structural schematic diagram of display panel provided by the embodiment of the present invention；Figure
2 be another schematic diagram of display panel in Fig. 1；Fig. 3 is the another schematic diagram of display panel in Fig. 1；Fig. 4 is that pixel is driven in Fig. 3
The structural schematic diagram of moving cell；Fig. 5 is the schematic cross-section for prolonging the direction AA ' and the direction BB ' along Fig. 4；Fig. 6 A is of the invention real
Apply the structural schematic diagram of another display panel provided by example；Fig. 6 B is the schematic cross-section for prolonging the direction CC ' along Fig. 6 A；Fig. 7
It is the structural schematic diagram of display panel provided by further embodiment of this invention；Fig. 8 is that light sensation fingerprint provided in this embodiment is known
The schematic diagram of other 1 course of work of unit；Fig. 9 is the another schematic diagram of display panel in Fig. 1；Figure 10 is that display panel exists in Fig. 9
A kind of schematic diagram of bending state；Figure 11 be in Fig. 9 display panel in the schematic diagram of another bending state.
Specifically as shown in Fig. 1~11, the embodiment of the invention provides a kind of display panel 100, display panel includes fingerprint
Cog region 101 (region as corresponding to light sensation fingerprint identification unit 1 in Fig. 7 is fingerprint identification region) and non-fingerprint identification area
102.Wherein, fingerprint identification area 101 includes transmission region Tr (dotted line frame in Fig. 3 and Fig. 6 A) and alternatively non-transparent district (such as pixel unit
PX1 and the region pixel unit PX2).Wherein, it should be noted that as shown in figure 4, light transmission in embodiments of the present invention
Region Tr refers to that on drive array substrate, light can be with the region of light transmission, as shown in dotted line frame in Fig. 3~6B, transparent area
(metal routing refers to the various metal function cablings on drive array substrate to metal routing, and such as the first constant voltage is believed in the Tr of domain
Number line VL, scan line S21/S22, data signal line DL, LED control signal line E21 etc.) setting is sparse, and metal routing is mutual
Between spacing it is larger, in conjunction with Fig. 7, so that light is reflected through transparent area via main body 3 (such as finger) light is touched
Domain Tr is injected in light sensation fingerprint identification unit 1.In addition, being primarily referred to as metal routing intensively for alternatively non-transparent district and being handed between film layer
The high region of folded degree, the metal routing due to being located at different film layers are overlapped between each other, can not be penetrated so as to cause light, such as
The impermeable optical device etc. of storage capacitance Cst1/Cst2 and driving transistor homalographic accounting greatly in Fig. 5 on drive array substrate.
Specifically, in conjunction with shown in FIG. 1 to FIG. 3, display panel 100 includes along the scan line of line direction setting and along column
The data signal line of direction setting, scan line and data signal line insulation, which intersect, defines multiple pixel drive units；In fingerprint
Cog region 101 includes multiple the first pixel drive units 111 in array setting；It include multiple in non-102nd area of fingerprint identification area
The second pixel drive unit 112 being arranged in array.Wherein, each first pixel drive unit 111 has the first area S1；Often
A second pixel drive unit 112 has second area S2, wherein the first area S1 is greater than second area S2.That is, being
It is vacated on drive array substrate and hands over big transmission region Tr, the embodiment of the present invention is by being compressed in fingerprint identification area 101
The area accounting of second pixel drive unit 112.Specifically how to realize, will be explained in detail in the examples below.
As shown in Figure 7 and Figure 8, in embodiments of the present invention, which further includes having light sensation fingerprint identification unit
1.The realization process of light sensation fingerprint identification function is substantially on the display panel：When carrying out fingerprint recognition, the light of light source sending
Line, which reaches, touches main body 3 (such as finger), and light is reflected through touching main body 3 (such as finger), and the light of reflection is irradiated to setting aobvious
Show that the light sensation fingerprint identification unit 1 in panel 100, light sensation fingerprint identification unit 1 judge fingerprint according to the light received
Valley and a ridge, to realize the fingerprint recognition of user.
As shown in figure 8, Fig. 8 is the schematic diagram of 1 course of work of light sensation fingerprint identification unit provided in this embodiment；Light sensation refers to
Line recognition unit 1 includes light sensing module 001, identification module 002 and feedback module 003.When carrying out fingerprint recognition, light
The light that source issues, which is irradiated to, touches main body 3, touches after main body 3 reflects light and forms reflection light, reflection light enters
It is mapped to light sensing module 001, light sensation induction module 001 is for incuding the light received, identification module 002 and light sensing
Module 001 is electrically connected, and the light for being received according to light sensing module 001 identifies the valley and a ridge of fingerprint；Feedback module
003 for feeding back to driving chip (not shown) for the fingerprint results that identification module 002 identifies, to execute corresponding operation.
With continued reference to Fig. 7, it should be noted that when carrying out fingerprint recognition, can be arranged on display panel 100 outer
Light source of the light source as fingerprint identification unit 1 is hung, alternatively, also can use each for normally showing in display panel 100
Light source of the luminescence unit as fingerprint identification unit.And in emitting red light unit, green emitting unit and blue-light-emitting unit,
Due to the brightness height for the green light that green emitting unit issues, and the life time decay of the luminescent layer of green emitting unit is slow, therefore,
Using each luminescence unit in display panel as when the light source of fingerprint identification unit 1, selection green of the embodiment of the present invention is sent out
Main light source of the light unit as fingerprint identification unit 1, while can be using blue-light-emitting unit as secondary light source.
In addition, in embodiments of the present invention, as shown in Fig. 9~Figure 11, for display provided in the embodiment of the present invention
Fingerprint identification area 101 specifically can be multiplexed with display surface for bent flexible display panels by panel 100
The bent area of plate is only retained organic by the way that the inorganic insulation layer in fingerprint identification area 101 in transmission region Tr to be removed
Planarization layer, to realize bending function.
Wherein, bent area 101 refers to that the display panel can carry out the bending of different angle along the bending direction axis X-X '.
Specifically as shown in figure 9, the display panel 100 carries out complete symmetrical fold along bending axis X-X ', the ruler of display panel is realized
The very little half size being reduced under unfolded state.Or as shown in Fig. 3, which can be along bending axis certain
In arc range or bending mechanism (being not shown in Fig. 9) is folded, and arc knot is presented in the bent area 101 under folded state
Structure.Certainly, in embodiments of the present invention, which can be folded towards the direction of on-screen displays, referred to as " interior
Folding "；Fold referred to as " being folded outward " towards the direction away from on-screen displays.In addition, the bent area of display panel
Being includes viewing area and non-display area, and being in the display area of bent area 101 includes multiple luminescence units.That is curved
Being in the display area of folding area 101 can carry out normal display picture as other regions of viewing area.
The state why can be realized folding or bending for the display panel in the embodiment of the present invention, be because
In the embodiment of the present invention, the flexible substrate substrate which uses, just can guarantee that the display panel can be realized can be soft
The bent state of property, the bending radius of curvature of the display panel is between 0.3mm~1.0mm in embodiments of the present invention, from can
It can both carry out " infolding " or carry out " being folded outward " to operate to realize, to guarantee that user is allow freely to realize bending
Operation.In addition, in present specification, " bending " be include bending operation on the different angles such as symmetrical fold direction.Fig. 2
Only there is provided two different bending states as example with Fig. 3.
The embodiment of the present invention forms transparent area by the way that the pixel drive unit in fingerprint identification area is being carried out compact Layout
Domain, and the inorganic insulation layer of transmission region is removed, can not only be promoted display panel light transmittance can also realize it is aobvious
Show the bent operation of panel, next will be illustrated in detail.
As shown in FIG. 1 to FIG. 7, a kind of display panel 100 provided by inventive embodiments, the display panel includes display
Area, the viewing area include fingerprint identification area 101 and non-fingerprint identification area 102.Wherein, which is correspondingly arranged on
(as shown in Figure 7) is arranged in light sensation fingerprint identification module 1, light emission side of the light sensation fingerprint identification module 1 away from viewing area.Certainly,
In embodiments of the present invention, fingerprint identification area 101 is multiplexed with bent area.That is, the display panel 100 this region into
Row bending operation.
With continued reference to shown in Fig. 3, multiple first pixel drive units 111 are correspondingly arranged in non-fingerprint identification area 102, often
A first pixel drive unit 111 has the first area S1；Multiple second pixels are correspondingly arranged in fingerprint identification area 101 to drive
Moving cell 112, each second pixel drive unit 112 have second area S2；Wherein, the first area S1 is greater than second area
S2.That is, area accounting of each first pixel drive unit 111 in array drive substrate is greater than the second pixel driver
Unit 112.
For in non-fingerprint identification area 102, including multiple transistors and accordingly in the first pixel drive unit 111
The pixel drive unit that storage capacitance is constituted, specifically as shown in figure 4, for being included at least in the first pixel drive unit 111
First driving transistor TM1 (rectangular dotted line outlines in Fig. 4) and other switching transistors and the first storage capacitance Cst1 are (in Fig. 4
Rectangular dotted line outlines).
In addition, non-fingerprint identification area 102 further includes a plurality of to the first of the first pixel drive unit 111 offer various types of signal
Signal wire.Specifically, including providing the reseting signal line V11 of reset reference signal to the first pixel drive unit 111；To
One pixel drive unit 111 provides the scan signal line of scanning drive signal, and scan signal line includes in the present invention is implemented
Third scan signal line S11 and the 4th scan signal line S12, wherein third scan signal line S11 and the 4th scan signal line S12
Different pulse signals are provided by different driving unit；It further include providing LED control signal to the first pixel drive unit 111
LED control signal line E11.Wherein, scan signal line (third scan signal line S11 and the 4th scan signal line S12) and reset
Signal wire V11 is arranged in parallel, i.e., extends along a first direction, successively arranges along second direction, and by different metal layer
Patterning is formed.In inventive embodiments, reseting signal line V11 is by being located at the intermetallic metal layer pattern above scan signal line
Change and formed, while the intermediate metal layer also patterns the electrode plate formed in the first storage capacitance Cst1 (shown in Fig. 5).
For LED control signal line E11, with the scan signal line (scanning of third scan signal line S11 and the 4th
Signal wire S12) it is arranged in parallel, i.e., extend along a first direction, successively arranges along second direction.And and scan signal line
It is to be formed by same metal layer pattern.To sum up, that is to say, that in embodiments of the present invention, third scan signal line S11, the 4th
Scan signal line S12 and LED control signal line E11 is formed by same metal layer, and arranged in parallel, it is specific come
It says, is formed by gate metal pattern layers.
It include multiple transistors and accordingly depositing in the second pixel drive unit 112 in fingerprint identification area 101
Storage holds constituted pixel drive unit, it is specific as described in Figure 4, for including at least the in the second pixel drive unit 112
Two drivings transistor TM2 (rectangular dotted line outlines in Fig. 4) and other switching transistors and the second storage capacitance Cst2 are (square in Fig. 4
Shape dotted line outlines).
In addition, fingerprint identification area 101 further includes a plurality of the second letter to the second pixel drive unit 112 offer various types of signal
Number line.Specifically, including providing the reseting signal line V21 of reset reference signal to the second pixel drive unit 112；To second
Pixel drive unit 112 provides the scan signal line of scanning drive signal, and scan signal line includes the in the present invention is implemented
Scan signal line S21 and the second scan signal line S22, wherein the first scan signal line S21 and the second scan signal line S22 by
Different driving unit provides different pulse signals；It further include providing the hair of LED control signal to the second pixel drive unit 112
Optical control signal line E21.Wherein, scan signal line (the first scan signal line S21 and the second scan signal line S22) and reset letter
Number line V21 is arranged in parallel, i.e., extends along a first direction, successively arrange along second direction, and schemed by different metal layer
Case is formed.In inventive embodiments, reseting signal line V21 is by being located at the intermetallic metal pattern layers above scan signal line
It is formed, while the intermediate metal layer also patterns the electrode plate formed in the second storage capacitance Cst2.
For LED control signal line E21, with the scan signal line (scanning of the first scan signal line S21 and second
Signal wire S22) it is arranged in parallel, i.e., extend along a first direction, successively arranges along second direction.And and scan signal line
It is to be formed by same metal layer pattern.To sum up, that is to say, that in embodiments of the present invention, the first scan signal line S21, second
Scan signal line S22 and LED control signal line E21 is formed by same metal layer, and arranged in parallel, it is specific come
It says, is formed by gate metal pattern layers.
In embodiments of the present invention, in fingerprint identification area 101 by by the second pixel drive unit 112 to first party
To compression design is carried out, by reducing the second storage capacitance Cst2, the second driving transistor TM2 and corresponding second signal line
Size, thus to form transmission region Tr.Specifically, it please refers to shown in Fig. 4, in order to both can guarantee to fingerprint identification area
The driving current of luminescence unit in 101, can be shown with the luminescence unit in non-fingerprint identification area 102 can guarantee it is uniform
Property, meanwhile, in order to form suitable transmission region Tr, guarantee the integral light-transmitting rate of display panel 5% or more, inventor passes through
Further investigation, in embodiments of the present invention, the area for the second storage capacitance Cst2 in fingerprint identification area 101 are non-fingerprint
0.5~0.8 times of the area of 102 first storage capacitance Cst1 of cog region.Since the area of storage capacitance in the driving unit accounts for
It is bigger than very, therefore preferentially reduce the storage capacitance area in fingerprint identification area 101 in the embodiment of the present invention.
Further, in order to further enhance the area accounting of transmission region Tr in fingerprint identification area 101, the present invention is implemented
Example is also by the size of the second driving of reduction transistor TM2, and specifically, the area of the second driving transistor TM2 is the first driving
0.5~0.8 times of the area of transistor TM1, but in order to guarantee the driving of the first driving transistor TM1 and second transistor TM2's
Driving capability is identical, thus guarantee that the ability for generating driving current is consistent, in embodiments of the present invention, the first driving transistor
The breadth length ratio W/L of TM1 and the breadth length ratio of the second driving transistor TM2 are about the same.Further, in order to further enhance fingerprint
The area accounting of transmission region Tr in cog region 101, the embodiment of the present invention also pass through the size of reduction second signal line, specifically
Ground, the width of second signal line are 0.5~0.8 times of the width of the first signal wire, for example, in fingerprint identification area 101
Reseting signal line V21 width be the reseting signal line V11 width in non-fingerprint identification area 102 half.
With continued reference to shown in Fig. 3 and Fig. 4, in inventive embodiments, by the transmission region Tr of fingerprint identification area 101
The second signal line is only set, transmission region Tr is defined by second signal line, specifically, transmission region Tr and corresponding phase
The second adjacent pixel drive unit 112 is disposed adjacent, and in other words, the is not provided in the transmission region Tr of fingerprint identification area 101
Two pixel drive units 112.It should also be noted that in embodiments of the present invention, transmission region Tr is answered by fingerprint identification area 101
The position signal wire V21 and LED control signal line E21 of fingerprint identification area 101 is defined.That is, the second pixel driver list
Member 112 is being compressed along a first direction, to form the multiple transmission region Tr being extended along second direction.
In embodiments of the present invention, in order to promote the light transmittance of transmission region Tr, while increasing entire fingerprint identification area
Bending resistance, the embodiment of the present invention fill corresponding high tenacity by the way that the inorganic insulation layer of transmission region Tr to be removed
Organic planarization layer.Specific as shown in Figure 4 and Figure 5, wherein Fig. 5 is in figure along the first driving in non-fingerprint identification area 102
The region transistor TM1 is along the cross section of AA ' dotted line；Along the transmission region Tr in fingerprint identification area 101 along BB ' dotted line
Cross section.Specifically, the first organic planarization layer PL1 and the first inorganic insulation layer are correspondingly arranged in non-fingerprint identification area
PV1, wherein it should be noted that the first inorganic insulation layer PV1 is generally one in silicon nitride, silicon oxynitride or silica
Kind or a variety of fine and close insulating film layers formed by depositing operation, have biggish stress；And the first organic planarization layer
PL1 is the planarization with excellent surface product formed by the macromolecule organic material with excellent toughness by coating process
Layer, thickness are greater than the first inorganic insulation layer PV1.In addition, in embodiments of the present invention, the first inorganic insulation layer PV1 can wrap
Multiple inorganic insulation layers are included, are normally between two overlapping or covering metal routings or metallic diaphragm.
With continued reference to shown in Fig. 5, the second organic planarization layer is correspondingly arranged in the transmission region Tr of fingerprint identification area 101
PL2；Wherein, the thickness of the second organic planarization layer PL2 is greater than the first organic planarization layer PL1, and specifically, second is organic flat
The thickness that the thickness difference of smoothization layer PL2 and the first organic planarization layer PL1 are about the first inorganic insulation layer PV1.That is,
Without the setting of the first inorganic insulation layer PV1 in transmission region Tr, the first inorganic insulation layer PV1 is complete in transmission region Tr in other words
Portion is removed, and is stuffed entirely with the second organic planarization layer PL2, to guarantee the light transmittance of transmission region Tr, while being increased finger
The buckle resistance of line cog region 101.In addition, it is necessary to explanation, in transmission region Tr, phase between multiple first signal wires
It does not mutually cover or overlaps, illustrate as figure 5 illustrates, reseting signal line V21 and the first scan signal line in fingerprint identification area 101
S21 is not overlapped.That is, in present example, LED control signal line E21, scanning signal in fingerprint identification area 101
The second organic planarization layer PL2 is provided only between the underlay substrate BS of line, reseting signal line V21 and display panel.
On the basis of above embodiments, the invention also discloses another display panels 100, specifically such as Fig. 6 A~Fig. 6 B institute
Show, in embodiments of the present invention, by carrying out the second pixel drive unit 112 to second direction in fingerprint identification area 101
Compression design, by reducing the size of the second storage capacitance, the second driving transistor and corresponding second signal line, to carry out shape
At transmission region Tr (dotted-line ellipse outlines in Fig. 6 A).
It specifically, as shown in Figure 6A, further include being mentioned to the second pixel drive unit 112 in fingerprint identification area 101
For the data signal line DL of data voltage signal；First to the second pixel drive unit 112 offer constant potential signal is constant
Voltage signal line VL.Wherein, data signal line DL and the first constant voltage signal line VL are arranged in parallel, by same metal layer
Patterning is formed.For example, the metal layer patterning formation of the source-drain electrode of the display panel.
In addition, in embodiments of the present invention, being set by the way that the second pixel drive unit 112 is carried out compression to second direction
Meter, in a second direction, form transmission region Tr between two adjacent the second pixel drive units 112.Multiple light transmissions
Region Tr is disposed to extend along a first direction, specifically, by two adjacent data signal line DL and/or the first constant voltage
Signal wire VL defines multiple transmission region Tr.That is, only having the data signal line of same layer setting in transmission region Tr
DL and the first constant voltage signal line VL arrangement.As shown in Figure 6B, in embodiments of the present invention, in present example, fingerprint
In cog region 101 between data signal line DL and/or the first constant voltage signal line VL and the underlay substrate BS of display panel only
It is provided with the second organic planarization layer PL2.To guarantee the light transmittance of transmission region Tr, make the light transmittance of its entire display panel
5% or more, while increasing the buckle resistance of fingerprint identification area 101.
The embodiment of the invention also provides a kind of display devices, and as shown in figure 12, Figure 12 is provided by the embodiment of the present invention
Display device structural schematic diagram, which includes above-mentioned display panel 100, and be arranged on display panel 100
Light sensation fingerprint identification module 1.Wherein, the specific structure of display panel 100 has carried out specifically in the above-described embodiments
Bright, details are not described herein again.Certainly, display device shown in Figure 12 is only schematically illustrate, which can be such as hand
Machine, tablet computer, laptop, any electronic equipment having a display function of electric paper book or television set etc..
The display device as provided by the embodiment of the present invention includes above-mentioned display panel, using the display device,
Inorganic insulation layer is removed by the transparent area to fingerprint identification area in display panel, only retains organic planarization layer, purport
In the light transmittance for increasing fingerprint identification area, the accuracy and sensitivity of light sensation fingerprint recognition is promoted, while display surface can also be promoted
The bending resistance of plate.
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 (14)
1. a kind of display panel, which is characterized in that the display panel includes viewing area, and the viewing area includes fingerprint identification area
With non-fingerprint identification area,
It is correspondingly arranged on light sensation fingerprint identification module in the fingerprint identification area, the light sensation fingerprint identification module is away from described aobvious
Show the light emission side setting in area；
The first organic planarization layer is correspondingly arranged in the non-fingerprint identification area；
The second organic planarization layer is correspondingly arranged in the transmission region of the fingerprint identification area；Wherein, the second organic planarization
The thickness of layer is greater than the first organic planarization layer；
Wherein, the first inorganic insulation layer is also correspondingly arranged in the non-fingerprint identification area；In the light transmission of the fingerprint identification area
Inorganic insulation layer is not provided in region.
2. display panel according to claim 1, which is characterized in that the second organic planarization layer has with described first
The thickness difference of machine planarization layer is about the thickness of first inorganic insulation layer.
3. display panel according to claim 1, which is characterized in that be correspondingly arranged in the non-fingerprint identification area multiple
First pixel drive unit, each first pixel drive unit have the first area；
Multiple second pixel drive units, each second pixel drive unit tool are correspondingly arranged in the fingerprint identification area
There is second area；
First area is greater than the second area.
4. display panel according to claim 3, which is characterized in that first pixel drive unit includes the first storage
Capacitor；Second pixel drive unit includes the second storage capacitance；
Wherein, the area of second storage capacitance is 0.5~0.8 times of the area of first storage capacitance.
5. display panel according to claim 3, which is characterized in that first pixel drive unit includes the first driving
Transistor；Second pixel drive unit includes the second driving transistor；
Wherein, the area of the second driving transistor is 0.5~0.8 times of the area of the first driving transistor；
And the breadth length ratio of the first driving transistor and the breadth length ratio of the second driving transistor are about the same.
6. display panel according to claim 3, which is characterized in that the non-fingerprint identification area further include be provided with to
First pixel drive unit provides the first signal wire of enable signal；
It is still provided in the fingerprint identification area to second pixel drive unit and the second signal line of enable signal is provided；
Wherein, the width of the second signal line is 0.5~0.8 times of the width of first signal wire.
7. display panel according to claim 6, which is characterized in that do not set in the transmission region of the fingerprint identification area
Set second pixel drive unit；
The second signal line is only set in the transmission region of the fingerprint identification area；
The transmission region is disposed adjacent with corresponding second pixel drive unit.
8. display panel according to claim 7, which is characterized in that the second signal line includes to second pixel
The scan signal line of driving unit offer scanning drive signal；
The second signal line further includes providing the LED control signal of LED control signal to second pixel drive unit
Line；
The second signal line further includes providing the reseting signal line of reset reference signal to second pixel drive unit；
The transmission region is defined by the reseting signal line and the LED control signal line；
Wherein, the scan signal line and the reseting signal line are arranged in parallel, and are formed by different metal pattern layers；
The scan signal line and the LED control signal line are arranged in parallel, and by identical metal layer patterning formation
It is provided only between the LED control signal line and/or the reseting signal line and the underlay substrate of the display panel
The second organic planarization layer.
9. display panel according to claim 7, which is characterized in that the second signal line includes to second pixel
The data signal line of driving unit offer data voltage signal；
The second signal line further includes providing the first constant voltage of constant potential signal to second pixel drive unit
Signal wire；
The transmission region is defined by two adjacent data signal lines and/or the first constant voltage signal line；
Wherein, the data signal line and the first constant voltage signal line are arranged in parallel, by same metal layer pattern
Change and is formed；
It is only set between the data signal line and/or the first constant voltage signal line and the underlay substrate of the display panel
It is equipped with the second organic planarization layer.
10. display panel according to claim 1, which is characterized in that the display panel further includes light sensation fingerprint recognition
Module, the light sensation fingerprint identification module include light sensing unit, recognition unit and feedback unit；
Wherein, the light sensing unit is for incuding the light received；
The recognition unit is used for the light received according to the light sensing unit, identifies the valley and a ridge of fingerprint；
The feedback unit is used to the fingerprint results that the recognition unit identifies feeding back to driving chip.
11. display panel according to claim 1, which is characterized in that the light sensing unit and the fingerprint recognition
The transmission region in area is correspondingly arranged.
12. described in any item display panels according to claim 1~11, which is characterized in that the display panel further includes curved
Folding area, the fingerprint identification area are set in the bent area.
13. display panel according to claim 12, which is characterized in that the display panel includes the transparent base of flexible substrate
Plate, the display panel are flexible bendable display panel, and the bending radius of curvature of the display panel is 0.3mm~1.0mm.
14. a kind of display device, which is characterized in that the display device includes the described in any item displays of claim 1~13
Panel.
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| CN201810856106.XA CN108898955A (en) | 2018-07-31 | 2018-07-31 | A kind of display panel and display device |
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Application publication date: 20181127 |