CN109697396A - A kind of organic electroluminescent display panel, display module and electronic equipment - Google Patents
A kind of organic electroluminescent display panel, display module and electronic equipment Download PDFInfo
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- CN109697396A CN109697396A CN201711001196.6A CN201711001196A CN109697396A CN 109697396 A CN109697396 A CN 109697396A CN 201711001196 A CN201711001196 A CN 201711001196A CN 109697396 A CN109697396 A CN 109697396A
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- 238000002834 transmittance Methods 0.000 claims abstract description 63
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 238000005401 electroluminescence Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 70
- 238000010586 diagram Methods 0.000 description 11
- 230000005611 electricity Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 6
- 239000002322 conducting polymer Substances 0.000 description 6
- 229920001940 conductive polymer Polymers 0.000 description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 6
- 229920001621 AMOLED Polymers 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000144 PEDOT:PSS Polymers 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
- H10K59/80518—Reflective anodes, e.g. ITO combined with thick metallic layers
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Image Input (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
This application involves field of display technology more particularly to a kind of organic electroluminescent display panels, display module and electronic equipment.It include at least one fingerprint identification area in the effective display area domain of the organic electroluminescent display panel, for the fingerprint identification region for passing through the received light of optical fingerprint sensor institute, the light transmittance of at least one fingerprint identification area is greater than the light transmittance in other regions in the effective display area domain.Each fingerprint identification area can be correspondingly arranged in specific implementation with one or more optical fingerprint sensors, it is greater than other regions in effective display area domain due to the light transmittance of fingerprint identification area, therefore can reduce light pass through fingerprint identification area when caused by light loss, and then can reduce as caused by light loss improve optical fingerprint sensor image quality reduce the problem of.
Description
Technical field
This application involves field of display technology more particularly to a kind of organic electroluminescent display panels, display module and electricity
Sub- equipment.
Background technique
In current consumption electronic product market, the design of mobile phone products is towards high screen accounting direction hair
Exhibition, screen accounting is intended to indicate that the parameter of the relative ratio of screen and Mobile telephone front panel area, by increasing the screen accounting of mobile phone,
The aesthetic appearance of mobile phone and the operating experience of user can be promoted to a certain extent.
To make mobile phone obtain higher screen accounting, currently used solution is that shortening or cancellation Mobile telephone front panel are upper
In the region on screen top and bottom end, the area of front panel can be made to reduce in the case where screen area is constant, to can be improved
The area occupied ratio of screen on the front panel.For the mobile phone with fingerprint identification function, before shortening or cancellation
When being located at the region of screen bottom end on plate, then aperture can not be carried out on the front panel to install fingerprint sensor, common solution
Mode is fingerprint sensor to be set in the rear shell of mobile phone, and occur for fingerprint sensor being mounted on screen back side in recent years
Design, such fingerprint sensor can pass through screen carry out fingerprint recognition, user by touch screen on fingerprint sensor pair
Fingerprint identification function can be used in the region answered.
Optical fingerprint sensor is a kind of fingerprint sensor for being usually used in screen back side at present, and working principle is referring to figure
Shown in 1, Fig. 1 is the operation principle schematic diagram of existing optical fingerprint sensor, as shown in Figure 1, the back side of screen 10 is equipped with
Optical fingerprint sensor 20, when the finger 30 of user is placed on screen 10 and 20 top face of optical fingerprint sensor
When region, the light 01 that screen 10 issues encounters 30 back reflection of finger and returns screen 10, and passes through screen 10 and passed by optical fingerprint
20 recognition imaging of sensor, and different fingerprint imagings can be formed according to the difference of manpower fingerprint, to realize that optical fingerprint is known
Other function.Based on this working principle, optical fingerprint sensor need to arrange in pairs or groups can self luminous screen work, therefore screen
In display panel should be organic electroluminescent (Organic Light-Emitting Diodes；OLED) display panel.Separately
It outside, is the image quality for guaranteeing fingerprint, region corresponding with fingerprint sensor should light transmittance with higher in display panel.
Shown in Figure 1, the display panel 11 of screen 10 is active matrix type organic electroluminescent (Active-Matrix Organic
Light Emitting Diode；AMOLED) display panel further includes for controlling OLED other than including oled layer 112
The drive array layer 111 of pixel switch in layer 112, drive array layer 111 have source electrode 1113, drain electrode 1112 and grid
1111, oled layer 12 has anode 1123, organic luminous layer 1121 and cathode 1122, wherein source electrode 1113, drain electrode 1112, grid
Pole 1111 and anode 1123 are made of metal material, and light transmittance is poor, will cause the light loss of reflection light, are surveyed through experiment
Examination learns that reflection light is about 44% through the amount of light loss of the anode 1123 of oled layer, and reflection light penetrates drive array layer
The amount of light loss of 111 source electrode 1113, drain electrode 1112 or grid 1111 is about 80%, is caused by organic electroluminescent display panel
Light loss will lead to optical fingerprint sensor image quality reduce, to influence the normal of the fingerprint identification function of mobile phone
It uses.
Summary of the invention
The application provides a kind of organic electroluminescent display panel, display module and electronic equipment, to solve existing skill
The light loss of organic electroluminescent display panel in art is higher, and then the image quality of optical fingerprint sensor is caused to reduce
The problem of.
In a first aspect, this application provides a kind of organic electroluminescent display panel, the ORGANIC ELECTROLUMINESCENCE DISPLAYS face
It include at least one fingerprint identification area in the effective display area domain of plate, the fingerprint identification region is for sensing optical fingerprint
The received light of device institute passes through, and the light transmittance of at least one fingerprint identification area is greater than other in the effective display area domain
The light transmittance in region.
It include at least one in effective display area domain in the organic electroluminescent display panel that the application first aspect provides
A fingerprint identification area, each fingerprint identification area corresponding with one or more optical fingerprint sensors can be set in specific implementation
It sets, since the light transmittance of fingerprint identification area is greater than other regions in effective display area domain, light can be reduced and passing through finger
Light loss caused by when line cog region, so can reduce as caused by light loss raising optical fingerprint sensor at image quality
The problem of amount reduces.
A kind of reflection in possible design, in the corresponding organic electro luminescent layer of described at least one fingerprint identification area
The light transmittance of electrode is greater than the reflecting electrode in the corresponding organic electro luminescent layer in other regions in the effective display area domain
Light transmittance.
By above-mentioned design, when the light transmittance of the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area is greater than
When the light transmittance of the reflecting electrode in the corresponding organic electro luminescent layer in other regions in effective display area domain, fingerprint can be improved
The light transmittance of cog region.
A kind of reflection in possible design, in the corresponding organic electro luminescent layer of described at least one fingerprint identification area
The light transmittance of electrode is greater than or equal to 90%.
By above-mentioned design, the light transmittance of the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area is greater than
Or when being equal to 90%, it is ensured that light causes lesser light loss after passing through organic electro luminescent layer, and then guarantees optical profile type
The image quality of fingerprint sensor.
A kind of reflection in possible design, in the corresponding organic electro luminescent layer of described at least one fingerprint identification area
The square resistance of electrode is less than 100 Ω/sq.
By above-mentioned design, the square resistance of the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area is small
When 100 Ω/sq, the operating voltage of organic electro luminescent layer can be reduced.
A kind of reflection in possible design, in the corresponding organic electro luminescent layer of described at least one fingerprint identification area
Electrode is made of indium tin oxide material or conducting polymer materials.
By above-mentioned design, it is ensured that the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area has required
Light transmittance and square resistance.
A kind of source and drain electricity in possible design, in the corresponding tft layer of described at least one fingerprint identification area
The light transmittance of pole and grid is greater than the source and drain electricity in the corresponding tft layer in other regions in the effective display area domain
The light transmittance of pole and grid.
By above-mentioned design, can source-drain electrode and grid in the corresponding tft layer of fingerprint identification area light transmittance
Greater than source-drain electrode and grid in the corresponding tft layer in other regions in effective display area domain light transmittance when, can
Improve the light transmittance of fingerprint identification area.
A kind of source and drain electricity in possible design, in the corresponding tft layer of described at least one fingerprint identification area
The light transmittance of pole and grid is greater than or equal to 90%.
By above-mentioned design, the light transmittance of the source-drain electrode in the corresponding tft layer of fingerprint identification area and grid
When more than or equal to 90%, it is ensured that light causes lesser light loss after passing through tft layer, and then guarantees optics
The image quality of formula fingerprint sensor.
A kind of source and drain electricity in possible design, in the corresponding tft layer of described at least one fingerprint identification area
The square resistance of pole and grid is less than 100 Ω/sq.
By above-mentioned design, the square of the source-drain electrode in the corresponding tft layer of fingerprint identification area and grid electricity
When resistance is less than 100 Ω/sq, the operating voltage of tft layer can be reduced.
A kind of source and drain electricity in possible design, in the corresponding tft layer of described at least one fingerprint identification area
Pole and grid are made of indium tin oxide material or conducting polymer materials.
By above-mentioned design, it is ensured that source-drain electrode and grid in the corresponding tft layer of fingerprint identification area have
Required light transmittance and square resistance.
In a kind of possible design, the area of the pixel at least one described fingerprint identification area is less than described effectively aobvious
Show the area of the pixel in other regions in region.
By above-mentioned design, pixel the blocking to the light for passing through fingerprint identification area in fingerprint identification area can be reduced, into
And improve the light transmittance of fingerprint identification area.
A kind of reflection in possible design, in the corresponding organic electro luminescent layer of described at least one fingerprint identification area
The area of electrode is less than the reflecting electrode in the corresponding organic electro luminescent layer in other regions in the effective display area domain
Area.
By above-mentioned design, the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area can be reduced to across finger
The light of line cog region blocks, and then improves the light transmittance of fingerprint identification area.
A kind of source and drain electricity in possible design, in the corresponding tft layer of described at least one fingerprint identification area
The area of pole and grid is less than the source-drain electrode in the corresponding tft layer in other regions in the effective display area domain
With the area of grid.
By above-mentioned design, source-drain electrode and grid in the corresponding tft layer of fingerprint identification area can be reduced to wearing
Blocking for the light of fingerprint identification area is crossed, and then improves the light transmittance of fingerprint identification area.
In a kind of possible design, the pixel density at least one described fingerprint identification area is less than effective display
The pixel density in other regions in region.
By above-mentioned design, pixel the blocking to the light for passing through fingerprint identification area in fingerprint identification area can be reduced, into
And improve the light transmittance of fingerprint identification area.
In a kind of possible design, the underlay substrate of the organic electroluminescent display panel is flexible base board or non-soft
Property substrate.
Second aspect, this application provides a kind of display modules, including such as above-mentioned first aspect and its all possible set
The organic electroluminescent display panel provided is provided.
It include at least one in the effective display area domain in display panel in the display module that the application second aspect provides
A fingerprint identification area, each fingerprint identification area corresponding with one or more optical fingerprint sensors can be set in specific implementation
It sets, since the light transmittance of fingerprint identification area is greater than other regions in effective display area domain, light can be reduced and passing through finger
Light loss caused by when line cog region, so can reduce as caused by light loss raising optical fingerprint sensor at image quality
The problem of amount reduces.
The third aspect, this application provides a kind of electronic equipment, including at least one optical fingerprint sensor and as above
The display module of second aspect offer is stated, the optical fingerprint sensor is set to opposite with the light emission side of the display module
From side, and at least one fingerprint fingerprint at least one described optical fingerprint sensor and the display module
Cog region corresponds.
In the electronic equipment that the application third aspect provides, packet in the effective display area domain of the display panel of display module
At least one fingerprint identification area is included, each fingerprint identification area in specific implementation can be with one or more optical fingerprint sensors
It is correspondingly arranged, since the light transmittance of fingerprint identification area is greater than other regions in effective display area domain, light can be reduced and existed
Light loss caused by when across fingerprint identification area, and then the raising optical fingerprint sensor as caused by light loss can be reduced
The problem of image quality reduces, to improve the normal function rate of the fingerprint identification function of electronic equipment.
According to the application first aspect, all possible design of first aspect, the application second aspect and the application third
Aspect, fingerprint identification area and non-fingerprint region PPI (Pixel Per Inch, the amount of pixels of inches) are identical, and non-fingerprint region is
Other regions in region other than fingerprint identification area, i.e. effective display area domain other than fingerprint identification area, fingerprint recognition
The light transmittance in area is greater than the light transmittance of non-fingerprint region.For example, the electrode of fingerprint identification area can select high low resistance electrode material thoroughly,
Such as select ITO (Indium Tin Oxide, tin indium oxide) and PEDOT:PSS (conducting polymer).Or,
Wherein, fingerprint identification area is identical with non-fingerprint region PPI, and the pixel electrode size of fingerprint identification area is less than non-fingerprint region
Pixel electrode size.Alternatively, fingerprint identification area is identical with non-fingerprint region PPI, the channel length of the TFT of fingerprint identification area is less than
The channel length of the TFT of non-fingerprint identification area.Or,
Wherein, the PPI of fingerprint identification area is less than the PPI of non-fingerprint region, the pixel of fingerprint identification area and non-fingerprint identification area
Size is identical.
The light transmittance of fingerprint identification area can be made greater than other areas in effective display area domain by above-mentioned three kinds of schemes
Domain, so can reduce light pass through fingerprint identification area when caused by light loss.
Detailed description of the invention
Fig. 1 is a kind of operation principle schematic diagram of optical fingerprint sensor in the prior art；
Fig. 2 is a kind of structural schematic diagram of organic electroluminescent display panel provided by the embodiments of the present application；
Fig. 3 is effective display area and the fingerprint recognition of a kind of organic electroluminescent display panel provided by the embodiments of the present application
The partial enlargement diagram in area；
Fig. 4 is that a kind of cross-section structure of a pixel of organic electroluminescent display panel provided by the embodiments of the present application shows
It is intended to；
Fig. 5 is that the effective display area of another organic electroluminescent display panel provided by the embodiments of the present application and fingerprint are known
The partial enlargement diagram in other area；
Fig. 6 a is the pixel in other regions in the effective display area domain of the organic electroluminescent display panel in Fig. 5
The schematic diagram of the section structure；
Fig. 6 b is the cross-section structure signal of the pixel in the fingerprint identification area of the organic electroluminescent display panel in Fig. 5
Figure；
Fig. 7 is that the effective display area of another organic electroluminescent display panel provided by the embodiments of the present application and fingerprint are known
The partial enlargement diagram in other area.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application make into
One step it is described in detail.
It is multiple involved in the application, refer to two or more.
In addition, it is necessary to understand, in the description of the present application, the vocabulary such as " first ", " second " are only used for distinguishing description
Purpose, be not understood to indicate or imply relative importance, can not be interpreted as indication or suggestion sequence.
The embodiment of the present application provides a kind of organic electroluminescent display panel, to solve Organic Electricity in the prior art
The light loss of photoluminescence display panel is higher, so cause optical fingerprint sensor image quality reduce the problem of.
Shown in Figure 2, Fig. 2 is a kind of structural representation of organic electroluminescent display panel provided by the embodiments of the present application
Figure, the organic electroluminescent display panel 100 have effective display area domain 110, and specifically, effective display area domain is display panel
In the region that can be shown, as shown in Fig. 2, including a fingerprint identification area 111, specific implementation in effective display area domain 110
In, fingerprint identification region 111 is used cooperatively with an optical fingerprint sensor, and for connecing optical fingerprint sensor
The light of receipts passes through, specifically, shown in Figure 3, and Fig. 3 is the partial enlargement signal of effective display area domain and fingerprint identification area
Figure, effective display area domain 110 include multiple pixels 200, equally include multiple pixels 200 in fingerprint identification area 111, specifically,
It include 3-4 sub-pixel in each pixel 200, pixel 200 can be made of three sub-pixels of three kinds of colors of display red, green, blue,
It can also be made of four sub-pixels of display red, green, blue, Huang Si kind color, it can also be by display red, green, blue, Bai Si kind color
Four sub-pixel compositions, the application are not specifically limited this；Referring back to shown in Fig. 4, Fig. 4 is that the cross-section structure of a pixel shows
It is intended to, it should be noted that organic electroluminescent display panel provided by the embodiments of the present application is active array type organic electroluminescence
Shine (Active-Matrix Organic Light Emitting Diode；AMOLED) display panel, i.e., in display panel
Further include tft layer other than including the oled layer for shining, includes multiple arrays point in tft layer
The thin film transistor (TFT) of cloth, each thin film transistor (TFT) are correspondingly arranged with a sub-pixel in a pixel, and for controlling correspondence
Sub-pixel switch, the structure of a sub-pixel, shown in Figure 4, display provided by the embodiments of the present application are only shown in Fig. 4
Each pixel 200 in panel includes organic electro luminescent layer 210 and tft layer 220, wherein organic electro luminescent layer
210 include cathode 211, organic layer 212 and anode 213, and a thin film transistor (TFT) in tft layer 220 includes source electrode
222, drain electrode 221 and grid 223.
Organic electroluminescent display panel provided by the embodiments of the present application in actual use, fingerprint identification area 111
It need to be used cooperatively with optical fingerprint sensor, a fingerprint identification area 111 can be correspondingly arranged one or more optical fingerprints
Sensor, each optical fingerprint identification sensor are set to the back side of the light emission side of organic electroluminescent display panel, are referring to
In line identification process, the light that the pixel in fingerprint identification area 111 issues is reflected back in display panel by the finger of user, and is worn
It crosses fingerprint identification area 111 to be irradiated on optical fingerprint sensor, caused by reducing light when passing through fingerprint identification area 111
Light loss needs to make the light transmittance of fingerprint identification area 111 to be greater than the light transmittance in other regions in effective display area domain.The application
Embodiment improves the light transmittance of fingerprint identification area 111 in the following way.
In one implementation, the light transmittance of the reflecting electrode in the corresponding organic electro luminescent layer of fingerprint identification area is big
The light transmittance of reflecting electrode in the corresponding organic electro luminescent layer in other regions in effective display area domain.Institute referring to fig. 4
Show, in organic electro luminescent layer 210, anode 213 is used as reflecting electrode, therefore the reflecting electrode in the fingerprint identification area is saturating
When light rate is greater than the light transmittance of the reflecting electrode in the organic electro luminescent layer in other regions in effective display area domain, it can subtract
Light loss caused by small light passes through after the reflecting electrode of fingerprint identification area, in a kind of specific embodiment, fingerprint identification area pair
The light transmittance for the reflecting electrode in organic electro luminescent layer answered should be greater than or be equal to 90%, to reduce light caused by reflecting electrode
Loss.The electric property of guarantee emission electrode itself is needed, also while guaranteeing the light transmittance of reflecting electrode to reduce Organic Electricity
The operating voltage of electroluminescent layer, improves the working life of organic layer, and in a kind of specific embodiment, fingerprint identification area is corresponding to be had
The square resistance of reflecting electrode in organic electroluminescent layer is less than 100 Ω/sq.In specific implementation, fingerprint identification area is corresponding
Reflecting electrode in organic electro luminescent layer can be made of indium tin oxide material or conducting polymer materials, so that reflecting electrode has
There are required light transmittance and square resistance.
For the light transmittance for further increasing fingerprint identification area, the corresponding tft layer of fingerprint identification area also can be improved
Light transmittance, shown in Figure 4, the light transmittance of source-drain electrode and grid in the corresponding tft layer 220 of fingerprint identification area
Greater than the light transmittance of source-drain electrode and grid in the corresponding tft layer in other regions in effective display area domain, to subtract
Small light pass through the corresponding tft layer of fingerprint identification area in source-drain electrode and grid after caused by light loss.A kind of tool
In body embodiment, the light transmittance of source-drain electrode and grid in the corresponding tft layer of fingerprint identification area is greater than or equal to
90%, to reduce light loss caused by source-drain electrode and grid.Meanwhile to reduce the operating voltage of source-drain electrode and grid, drop
The power consumption of low thin film transistor (TFT), in a kind of specific embodiment, the source and drain electricity in the corresponding tft layer of fingerprint identification area
The square resistance of pole and grid is less than 100 Ω/sq.In specific implementation, in the corresponding tft layer of fingerprint identification area
Source-drain electrode and grid can be made of indium tin oxide material or conducting polymer materials, so that needed for source-drain electrode and grid have
Light transmittance and square resistance.
In another implementation, shown in Figure 5, Fig. 5 is another organic electroluminescence provided by the embodiments of the present application
The effective display area domain of light emitting display panel and the partial enlargement diagram of fingerprint identification area 111, the picture in fingerprint identification area 111
The area of element 200 is less than the area of the pixel 200 in other regions in effective display area domain.Then light is passing through fingerprint recognition
When area 111, a part of light can be by passing through, since this some light does not pass through pixel in the gap between adjacent pixel 200
200, therefore not will receive the organic electro luminescent layer 210 of pixel 200 and the blocking of tft layer 220, light loss compared with
It is small, the light loss of whole light across fingerprint identification area 111 can be reduced, and then improve the light transmittance of fingerprint identification area 111.
It specifically, is the area for reducing the pixel 200 in fingerprint identification area 111, it can be by reducing the corresponding organic hair of each pixel 200
The area of electrode in photosphere 210 and the area for reducing the electrode in the corresponding tft layer 220 of each pixel 200
To realize.Referring specifically to fig. 6 shown in a and Fig. 6 b, Fig. 6 a is the section of the pixel 200 in other regions in effective display area domain
Structural schematic diagram, Fig. 6 b are the schematic diagram of the section structure of the pixel 200 in fingerprint identification area 111, in a kind of specific embodiment,
The area of reflecting electrode in the corresponding organic electro luminescent layer 210 of fingerprint identification area 111 is less than its in effective display area domain
The area of reflecting electrode in the corresponding organic electro luminescent layer 210 in his region, so that the pixel 200 in fingerprint identification area 111
Area reduces, and reduces blocking of the reflecting electrode to light, similarly, with continued reference to shown in Fig. 6 a and Fig. 6 b, in the thin of pixel 200
In film transistor layer 220, the area of source-drain electrode and grid in the corresponding tft layer 220 of fingerprint identification area 111 is small
The area of source-drain electrode and grid in the corresponding tft layer 220 in other regions in effective display area domain, equally
It can play the role of reducing 200 area of pixel, and reduce the blocking of source-drain electrode and grid to light.
In another implementation, shown in Figure 7, Fig. 7 is another organic electroluminescence provided by the embodiments of the present application
The effective display area domain of light emitting display panel and the partial enlargement diagram of fingerprint identification area, the pixel in fingerprint identification area 111
Density is less than the pixel density in other regions in effective display area domain.Pixel density in fingerprint identification area 111 is less than
When pixel density in other regions in effective display area domain, between increasing in fingerprint identification area 111 between adjacent pixel
Gap size, then light pass through fingerprint identification area 111 when, a part of light can by being passed through in the gap between adjacent pixel,
Since this some light does not pass through pixel, the organic electro luminescent layer of pixel and the resistance of tft layer not will receive
Gear, light loss is smaller, can reduce the light loss of whole light across fingerprint identification area 111, and then make fingerprint identification area 111
Light transmittance improve.In specific implementation, it can be referred to by way of reducing the ranks number of the pixel in fingerprint identification area 111 to reduce
The pixel density of line cog region 111.
It is effectively aobvious that above-mentioned three kinds of implementations provided by the embodiments of the present application can be such that the light transmittance of fingerprint identification area is greater than
Show the light transmittance in other regions in region, and then light loss caused by light can be reduced when passing through fingerprint identification area, and changes
The problem of kind image quality that optical fingerprint sensor is improved as caused by light loss is reduced.In specific implementation, organic
Any light transmittance to improve its fingerprint identification area in above-mentioned three kinds of implementations can be used in electroluminescence display panel,
It can be used simultaneously any two kinds in above-mentioned three kinds of implementations, such as the same of the elemental area in fingerprint identification area can reduced
When reduce pixel density, or subtract while improving the light transmittance of the reflecting electrode in fingerprint identification area, source-drain electrode and grid
Elemental area in small fingerprint identification area, or in the light transmission for improving reflecting electrode, source-drain electrode and grid in fingerprint identification area
Pixel density is reduced while rate, in addition above-mentioned three kinds of implementations also can be used simultaneously.It should be noted that the application is implemented
The organic electroluminescent display panel that example provides can be flexible display panels or non-flexible display panel, therefore organic electroluminescent
The underlay substrate of display panel is flexible base board or non-flexible substrate.In addition, being sent out in organic electroluminescence provided by the embodiments of the present application
In the effective display area domain of light display panel, fingerprint identification area is at least one, and in other embodiments, fingerprint identification area is also
It can be two or more.
Based on the same inventive concept, the embodiment of the present application also provides a kind of display modules, including as above-described embodiment mentions
The organic electroluminescent display panel of confession.In specific implementation, which further includes the structures such as protection glass, driving circuit.
Light loss caused by the display module can equally reduce light when passing through the fingerprint identification area of its display panel, and then can improve
The problem of image quality of optical fingerprint sensor is improved as caused by light loss to be reduced.Its principle and specific implementation
Referring to above-described embodiment, repeat no more.
Based on the same inventive concept, the embodiment of the present application also provides a kind of electronic equipment, including an optical fingerprint
Sensor and such as display module provided by the above embodiment, optical fingerprint sensor is set to the light emission side phase with display module
The side deviated from, and optical fingerprint sensor is correspondingly arranged with the fingerprint fingerprint identification area in display module.
When display panel in display module has two or more fingerprint identification areas, then optical fingerprint sensor
Quantity also needs corresponding increase, and the quantity of the quantity of optical fingerprint sensor and fingerprint identification area corresponds.Specific implementation
In, electronic equipment provided by the embodiments of the present application can be mobile phone, tablet computer, laptop, apparatus such as computer.
Light loss caused by electronic equipment provided by the embodiments of the present application can equally reduce light when passing through fingerprint identification area
The problem of losing, and then the image quality reduction for improving optical fingerprint sensor as caused by light loss can be reduced, to mention
The normal function rate of the fingerprint identification function of high electronic equipment.Its principle and specific implementation are referring to above-described embodiment, no longer
It repeats.
Based on the above-mentioned technical proposal, fingerprint identification area and non-fingerprint region PPI (Pixel Per Inch, the picture of inches
Element amount) it is identical, non-fingerprint region is the region other than fingerprint identification area, i.e., in effective display area domain other than fingerprint identification area
Other regions, the light transmittance of fingerprint identification area is greater than the light transmittance of non-fingerprint region.For example, the electrode of fingerprint identification area can select
With high low resistance electrode material thoroughly, ITO (Indium Tin Oxide, tin indium oxide) and PEDOT:PSS (conducting polymer are such as selected
Object).Or,
Wherein, fingerprint identification area is identical with non-fingerprint region PPI, and the pixel electrode size of fingerprint identification area is less than non-fingerprint region
Pixel electrode size.Alternatively, fingerprint identification area is identical with non-fingerprint region PPI, the channel length of the TFT of fingerprint identification area is less than
The channel length of the TFT of non-fingerprint identification area.Or,
Wherein, the PPI of fingerprint identification area is less than the PPI of non-fingerprint region, the pixel of fingerprint identification area and non-fingerprint identification area
Size is identical.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (14)
1. a kind of organic electroluminescent display panel, which is characterized in that effective display of the organic electroluminescent display panel
It include at least one fingerprint identification area in region, the fingerprint identification region is for making the received light of optical fingerprint sensor institute
Line passes through, and the light transmittance of at least one fingerprint identification area is greater than the light transmission in other regions in the effective display area domain
Rate.
2. organic electroluminescent display panel according to claim 1, which is characterized in that at least one described fingerprint recognition
The light transmittance of reflecting electrode in the corresponding organic electro luminescent layer in area is greater than other regions pair in the effective display area domain
The light transmittance for the reflecting electrode in organic electro luminescent layer answered.
3. organic electroluminescent display panel according to claim 2, which is characterized in that at least one described fingerprint recognition
The light transmittance of reflecting electrode in the corresponding organic electro luminescent layer in area is greater than or equal to 90%.
4. organic electroluminescent display panel according to claim 3, which is characterized in that at least one described fingerprint recognition
The square resistance of reflecting electrode in the corresponding organic electro luminescent layer in area is less than 100 Ω/sq.
5. organic electroluminescent display panel according to claim 1-4, which is characterized in that it is described at least one
The light transmittance of source-drain electrode and grid in the corresponding tft layer of fingerprint identification area is greater than in the effective display area domain
The corresponding tft layer in other regions in source-drain electrode and grid light transmittance.
6. organic electroluminescent display panel according to claim 5, which is characterized in that at least one described fingerprint recognition
The light transmittance of source-drain electrode and grid in the corresponding tft layer in area is greater than or equal to 90%.
7. organic electroluminescent display panel according to claim 6, which is characterized in that at least one described fingerprint recognition
The square resistance of source-drain electrode and grid in the corresponding tft layer in area is less than 100 Ω/sq.
8. organic electroluminescent display panel according to claim 1-7, which is characterized in that it is described at least one
The area of pixel in fingerprint identification area is less than the area of the pixel in other regions in the effective display area domain.
9. organic electroluminescent display panel according to claim 8, which is characterized in that at least one described fingerprint recognition
It is corresponding that the area of reflecting electrode in the corresponding organic electro luminescent layer in area is less than other regions in the effective display area domain
Organic electro luminescent layer in reflecting electrode area.
10. organic electroluminescent display panel according to claim 8 or claim 9, which is characterized in that at least one described fingerprint
The area of source-drain electrode and grid in the corresponding tft layer of cog region is less than other in the effective display area domain
The area of source-drain electrode and grid in the corresponding tft layer in region.
11. -10 described in any item organic electroluminescent display panels according to claim 1, which is characterized in that described at least one
Pixel density in a fingerprint identification area is less than the pixel density in other regions in the effective display area domain.
12. organic electroluminescent display panel according to claim 1, which is characterized in that the organic electroluminescent is aobvious
The underlay substrate for showing panel is flexible base board or non-flexible substrate.
13. a kind of display module, which is characterized in that including such as described in any item ORGANIC ELECTROLUMINESCENCE DISPLAYSs of claim 1-12
Panel.
14. a kind of electronic equipment, which is characterized in that including at least one optical fingerprint sensor and as claimed in claim 13
Display module, the optical fingerprint sensor is set to the side being away from each other with the light emission side of the display module, and institute
At least one the fingerprint fingerprint identification area one stated at least one optical fingerprint sensor and the display module is a pair of
It answers.
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| CN201711001196.6A CN109697396A (en) | 2017-10-24 | 2017-10-24 | A kind of organic electroluminescent display panel, display module and electronic equipment |
| PCT/CN2018/099377 WO2019080591A1 (en) | 2017-10-24 | 2018-08-08 | Organic electroluminescent display panel, display module and electronic device |
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|---|---|---|---|
| CN201711001196.6A CN109697396A (en) | 2017-10-24 | 2017-10-24 | A kind of organic electroluminescent display panel, display module and electronic equipment |
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