CN108614982A - Display module and its application method - Google Patents
Display module and its application method Download PDFInfo
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- CN108614982A CN108614982A CN201611131218.6A CN201611131218A CN108614982A CN 108614982 A CN108614982 A CN 108614982A CN 201611131218 A CN201611131218 A CN 201611131218A CN 108614982 A CN108614982 A CN 108614982A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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Abstract
A kind of display module and its application method.Wherein, the display module includes light-emitting display panel, and light-emitting display panel includes first substrate, second substrate and self-luminescence circuit layer, and for self-luminescence circuit layer between first substrate and second substrate, self-luminescence circuit layer includes multiple display pixel cells；Each display pixel cells include at least one alternatively non-transparent district and at least one transparent area；Further include：Light transmission medium layer；Optical fingerprint sensor, optical fingerprint sensor are located at below light transmission medium layer；Dotted backlight, dotted backlight is located at below second substrate, and dotted backlight is located at the side of light transmission medium layer, and the light that dotted backlight is sent out is with angle obliquely, enter light transmission medium layer from the side of light transmission medium layer, and enters second substrate obliquely from light transmission medium layer.The display module can be good at integrated optics fingerprint identification function.
Description
Technical field
The present invention relates to optical finger print identification field more particularly to a kind of display modules and its application method.
Background technology
Fingerprint imaging identification technology is the fingerprint image that human body is collected by fingerprint sensor, then in system
Have fingerprint imaging information to be compared, whether carrying out correct judgment, and then realizes the technology of identification.The side used due to it
Just property and the uniqueness of somatic fingerprint, fingerprint identification technology have been widely used in every field.Such as public security bureau, customs
Etc. field of safety check, consumer product areas such as the access control system and PC of building and mobile phone etc..
The realization method of fingerprint imaging identification technology has the multiple technologies such as optical imagery, capacitance imaging, ultrasonic imaging.Relatively
For, optical finger print imaging technique, imaging effect is relatively preferable, and equipment cost is relatively low.
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display module is FPD neck
One of the hot spot in domain.OLED display modules have many advantages, such as low energy consumption, wide colour gamut, self-luminous, wide viewing angle and quick response, at present
Apply in electronic products such as mobile phone, computer and digital cameras.
In the prior art, the display module for mostly using capacitance type fingerprint imaging technique and Organic Light Emitting Diode is collected
At.More contents in relation to integrating fingerprint identification function in display module can refer to the middle promulgated by the State Council of Publication No. CN106024833A
Bright patent application.
The display module structure of existing integrating fingerprint identification function has much room for improvement, and performance is to be improved.
Invention content
Problems solved by the invention is to provide a kind of display module, and optical finger print identification function is integrated in display to realize
In module, make display module that there is good fingerprint identification function.
To solve the above problems, the present invention provides a kind of display modules, including：Light-emitting display panel, it is described spontaneous
Light display panel includes first substrate, second substrate and self-luminescence circuit layer, and the self-luminescence circuit layer is located at first base
Between plate and the second substrate, the self-luminescence circuit layer includes multiple display pixel cells；Each display pixel list
Member includes at least one alternatively non-transparent district and at least one transparent area；Further include：Light transmission medium layer；Optical fingerprint sensor, it is described
Optical fingerprint sensor is located at below the light transmission medium layer；Dotted backlight, the dotted backlight are located under second substrate
Side, the dotted backlight be located at the side of the light transmission medium layer, and the light that the dotted backlight is sent out is with obliquely
Angle enters the light transmission medium layer from the side of the light transmission medium layer, and enters institute obliquely from the light transmission medium layer
State second substrate.
Optionally, the display module further includes protective layer, and the protective layer is located above the first substrate.
Optionally, the second substrate lower surface further includes light shield layer close to the region of the dotted backlight.
Optionally, there is light transmission glue, the dotted back of the body between the dotted backlight and the side of the light transmission medium layer
The light that light source is sent out from the light-emitting surface of the dotted backlight enter the light transmission glue, then from the light transmission glue enter it is described
The side of optical medium layer.
Optionally, the side and the light shield layer lower surface of light transmission medium layer described in the light transmission glue sticking.
Optionally, there is collector lens, the collector lens can make described before the light-emitting surface of the dotted backlight
The light of dotted backlight is converted to directional light or nearly directional light, and it is saturating that the light of the dotted backlight is introduced into the optically focused
Mirror enters back into the side of the light transmission medium layer.
Optionally, there is optical cement between the light-emitting display panel and the optical fingerprint sensor.
Optionally, there is optical cement between the light-emitting display panel and the protective layer.
Optionally, the dotted backlight is a LED light, and the light of the LED light is black light, purple light, blue
Light, green light, sodium yellow, red light, near infrared light or white light；Alternatively, the dotted backlight is more than two LED light,
Described two above LED light are evenly distributed on the lower section of the second substrate, the light of the LED light be black light, purple light,
Blue light, green light, sodium yellow, red light, near infrared light or white light.
To solve the above problems, the present invention also provides a kind of application method of display module, the display module includes：
Light-emitting display panel, the light-emitting display panel include first substrate, second substrate and self-luminescence circuit layer, described spontaneous
For optical circuit layer between the first substrate and the second substrate, the self-luminescence circuit layer includes multiple display pixel lists
Member, each display pixel cells include at least one alternatively non-transparent district and at least one transparent area；Light transmission medium layer；Optics refers to
Line sensor, the optical fingerprint sensor are located at below the light transmission medium layer；Dotted backlight, the dotted backlight position
Below second substrate, the dotted backlight is located at the side of the light transmission medium layer, the light that the dotted backlight is sent out
Line enters the light transmission medium layer with angle obliquely, from the side of the light transmission medium layer, and from the light transmission medium layer
Enter the second substrate obliquely；The application method includes：By in the light-emitting display panel with the optical finger print
The opposite display area of sensor is defined as the first display area, and the display area of other parts is defined as the second display area；
When the optical fingerprint sensor carries out fingerprint image acquisition work, controls first display area and stop carrying out display work
Make.
Optionally, the application method further includes：When the optical fingerprint sensor carries out fingerprint image acquisition work,
It controls second display area and shows information associated with fingerprint image acquisition work.
Compared with prior art, technical scheme of the present invention has the following advantages：
In technical scheme of the present invention, the optical fingerprint sensor and dotted backlight be may be contained within into self-luminous and shown
Below the second substrate of panel, and it is set to the side of light transmission medium layer, optical fingerprint sensor is then set to light transmission
Below dielectric layer.Light-emitting display panel is provided with transparent area, therefore, the light that dotted backlight is sent out can be made from side
It, can be back and forth through light-emitting display panel, so as to be realized to finger using display module after face passes through light transmission medium layer
The acquisition of fingerprint image, also, collected fingerprint image is clear, and display module is made to be integrated with good fingerprint identification function.
In technical scheme of the present invention, when using display module, control corresponding with optical fingerprint sensor first is shown
Show that region when optical fingerprint sensor carries out fingerprint image acquisition work, is stopped, and it is aobvious to control the second display area
Show information associated with fingerprint image acquisition work, so that display function and fingerprint identification function cooperate,
Realize better user experience.
Description of the drawings
Fig. 1 is the display module cross-sectional view that the embodiment of the present invention is provided；
Fig. 2 is the display module cross-sectional view that another embodiment of the present invention is provided.
Specific implementation mode
As described in background, the prior art mostly uses the aobvious of capacitance type fingerprint imaging technique and Organic Light Emitting Diode
Show that module is integrated.
For this purpose, in a kind of display module of present invention offer, optical fingerprint sensor and light-emitting display panel are integrated in
Together, to while realizing display, realize fingerprint identification function, also, pass through corresponding structure design so that aobvious
Show that module can collect clearly fingerprint image, and display function and fingerprint identification function are cooperated, makes
Obtain user has better usage experience to display module.
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
The embodiment of the present invention provides a kind of display module, please refers to Fig.1.
The display module includes light-emitting display panel (not marking), light transmission medium layer 120, optical fingerprint sensor
130 and dotted backlight 140.
In the display module, light-emitting display panel includes first substrate 111, second substrate 112 and self-luminescence circuit
Layer 113.Self-luminescence circuit layer 113 is between first substrate 111 and second substrate 112.Light-emitting display panel further includes close
Seal structure 114.Sealing structure 114 also is located between first substrate 111 and second substrate 112.Sealing structure 114 and first substrate
111 and second substrate 112 together, self-luminescence circuit layer 113 is sealed between first substrate 111 and second substrate 112.
In the present embodiment, the material of first substrate 111 and second substrate 112 can be translucent material, wherein first substrate
111 can be transparent material.Specifically, their material all can be unorganic glass or organic glass, can also be organic
Other resin materials other than glass.
In the light-emitting display panel, self-luminescence circuit layer 113 (is used including multiple display pixel cells 1131 in Fig. 1
Dotted line frame illustrates 1131 neighbouring relations of display pixel cells 1131 and each display pixel cells.Although being noted that dotted line
Frame includes part first substrate 111 and second substrate 112, but this is only to facilitate display, display pixel cells 1131 are simultaneously
Do not include first substrate 111 and second substrate 112).Each display pixel cells 1131 are including at least one alternatively non-transparent district and extremely
Lack a transparent area 11311, illustrating a transparent area 11311 in Fig. 1, (i.e. one of 11311 location of transparent area is such as
Shown in the range that minimum dotted line frame is surrounded in Fig. 1).
In the present embodiment, the light-emitting display panel is OLED display panel, the display pixel of self-luminescence circuit layer 113
Unit 1131 may include anode layer, hole injection layer (HIL), luminescent layer (EML), electron injecting layer (EIL) and cathode layer etc.,
Can also have hole transmission layer (HTL) and electron transfer layer (ETL), can also include TFT, the driving metal wire of driving OLED
With storage capacitance etc..The principle of luminosity of OLED display panel is：Under certain voltage driving, electrons and holes are respectively from cathode layer
Luminescent layer is moved to anode layer, and is met in luminescent layer, exciton is formed and light emitting molecule is made to excite, light emitting molecule passes through spoke
It penetrates relaxation and sends out visible light (or other light).Wherein, the structures such as above-mentioned luminescent layer are located in corresponding alternatively non-transparent district.And
The display pixel cells 1131 on alternatively non-transparent district periphery, the present embodiment have corresponding transparent area 11311.
Self-luminescence circuit layer 113 is produced on second substrate 112 in the present embodiment, the self-luminescence circuit layer 113 and institute
Stating has void layer between first substrate 111.And the inert gases such as nitrogen or argon gas are filled in the void layer, to protect
The self-luminescence circuit layer 113 will not be damaged by pressure by first substrate 111.
Height of the height equal to self-luminescence circuit layer 113 of transparent area 11311 is arranged in the present embodiment, as shown in Figure 1, to
Ensure that light can pass through self-luminescence circuit layer 113 (it should be noted that each position of self-luminescence circuit layer 113 from transparent area
Height may slightly have difference, but at least partly height phase of the height of the self-luminescence circuit layer 113 of position and transparent area 11311
Deng).And light can pass through self-luminescence circuit layer 113 from transparent area, ensure that display module can carry out fingerprint image acquisition.
By above-mentioned void layer content it is found that light across the light-emitting display panel, generally comprise across second substrate 112,
Transparent area 11311, void layer and first substrate 111.
Specifically, having the semiconductor layer structures such as corresponding luminescent layer in the alternatively non-transparent district of a display pixel cells 1131
(these semiconductor layer structures needs are protected from light, and therefore, are produced on alternatively non-transparent district), and other positions could be provided as light transmission
Area, i.e., on the basis of ensureing the realization of corresponding construction and function, the other structures of display pixel cells 1131 can be as possible
It is made of translucent construction.Also, the structure between adjacent display pixels unit 1131 can also use translucent construction system as possible
Make.Meanwhile other than the display area where these display pixel cells 1131, such as in driving circuit and binding pin etc.
The production location of structure can also be arranged to corresponding transparent area, so that more light can pass through OLED display surfaces
Plate (this passes through and is often referred to pass through from the height of display pixel cells 1131, and height is usually alternatively referred to as thickness).
As shown in Figure 1, the optical fingerprint sensor is located at 120 lower section of light transmission medium layer.That is, light transmission medium layer
120 are set between the light-emitting display panel and optical fingerprint sensor 130.
It should be noted that the optical fingerprint sensor includes fingerprint sensing circuit layer (not distinctly displaying) and substrate base
Plate (does not distinctly display).In the case of a kind of wherein, fingerprint sensing circuit layer be located at light transmission medium layer 120 and underlay substrate it
Between.In another case, underlay substrate is between light transmission medium layer 120 and fingerprint sensing circuit layer.
The fingerprint sensing circuit layer of optical fingerprint sensor 130 includes multiple sensitive pixel elements (not shown).Wherein
In the case of one kind, each sensitive pixel elements may include transmission region and non-transparent region (with display pixel cells
Transparent area in 1131 is mutually distinguished with alternatively non-transparent district).(photosensitive element can be the photosensitive element of the sensitive pixel elements
The structures such as light sensitive diode) it is located at the non-transparent region.In another case, it is situated between when fingerprint sensing circuit layer is located at light transmission
Between matter layer 120 and underlay substrate, sensitive pixel elements can also be completely without transmission region, and only non-transparent region,
But it needs to ensure that light can enter corresponding photosensitive element obliquely from light transmission medium layer 120.
In the present embodiment, the optical fingerprint sensor can be based on Silicon Wafer with CMOS (Complementary
Metal Oxide Semiconductor, complementary metal oxide semiconductor) technique make imaging sensor, can also be
The imaging sensor made with TFT (Thin Film Transistor, thin film transistor (TFT)) technique based on glass substrate.
In the present embodiment, dotted backlight 140 is located at 112 lower section of second substrate, meanwhile, dotted backlight 140 is also located at
The side of light transmission medium layer 120, the light that dotted backlight 140 is sent out is with angle obliquely, from the side of light transmission medium layer 120
Face enters light transmission medium layer 120, and enters second substrate 112 obliquely from light transmission medium layer 120.
Dotted backlight 140 is set to the side of the optical fingerprint sensor by the present embodiment, to make dotted backlight
Light that source 140 is sent out, for fingerprint image acquisition, must be the side for entering light transmission medium layer 120 with the angle of oblique incidence
Face.These light will continue to enter second substrate 112 with the angle of oblique incidence, and pass through self-luminescence circuit layer 113, to oblique
It injects into first substrate 111.Also, light can be formed by interface in finger print and 111 upper surface of first substrate
The optical phenomenas such as reflection and refraction, generate corresponding reflection light.By the principle of optical propagation it is found that these reflection lights are usual
To first substrate 111 equally be returned with the angle of oblique incidence obliquely.These reflection lights will continue to oblique with the angle of oblique incidence
It is passed down through self-luminescence circuit layer 113, to which oblique incidence enters second substrate 112.Then proceed to the angle of oblique incidence obliquely
Across light transmission medium layer 120, then to reach the optical fingerprint sensor (i.e. incident obliquely to enter the optical finger print and sense
Device), and received by the sensitive pixel elements in optical fingerprint sensor.It is this for the area source using light guide plate
The setting of dotted backlight 140 enables to light, and along the offset of the same direction, (and the light of light guide plate is all directions substantially
Mixed and disorderly, offset direction is differed), avoid (and the meeting between the light of light guide plate of interfering with each other and influencing each other between light
Interfere with each other and influence), also, the light offset similar in 140 position of dotted backlight is close, and it is clear so as to obtain
Clear fingerprint image improves the fingerprint recognition performance of module.
In the present embodiment, dotted backlight 140 can be a LED light.The light of the LED light can be black light,
Purple light, blue light, green light, sodium yellow, red light, near infrared light or white light.
In the present embodiment, 112 lower surface of second substrate further includes light shield layer 160 close to the region of dotted backlight 140.It hides
The light that photosphere 160 is used to prevent dotted backlight 140 from sending out directly enters second substrate 112 from 112 lower surface of second substrate,
To ensure that the light into second substrate 112 all is from light transmission medium layer 120.
Light shield layer 160 can be itself a non-transparent solid structure, for example, metal layer.Light shield layer 160 at this time
Thickness can be set as needed, and the usual bigger shaded effect of thickness is better.
In other embodiments, light shield layer may be used ink coating formed it is (such as directly corresponding in second substrate lower surface
Region coating ink coating is as light shield layer), other suitable materials and mode can also be used to be formed.
In the present embodiment, there is light transmission glue 150, the dotted back of the body between dotted backlight 140 and the side of light transmission medium layer 120
The light that light source 140 is sent out enters light transmission glue 150 from the light-emitting surface of dotted backlight 140, then enters light transmission from light transmission glue 150 and be situated between
The side of matter layer 120.The light that the setting of light transmission glue 150 can be such that dotted backlight 140 sends out more preferably is incident to
The side of optical medium layer 120, reduces interface reflection, and the refractive index of light transmission glue 150 is more than 1, reduces the light into second substrate 112
The refraction amplitude of line.And if being not provided with light transmission glue, the light that dotted backlight is sent out needs after vacuum or air, then
Into the side of light transmission medium layer 120, and light is easy that the rough sledding such as reflection and scattering (light appearance occurs in this process
Easily interface is formed by with 120 side of light transmission medium layer in vacuum or air and the rough sledding such as reflection occur, and air is also
It can make some light that the rough sledding such as scattering occur).
In the present embodiment, light transmission glue 150 is bonded 160 lower surface of side and light shield layer of light transmission medium layer 120.This set
Phenomena such as enabling to light transmission glue 150 itself to be preferably fixed in corresponding position, be not susceptible to fall off and remove.Light transmission glue
The material that 150 material can select light transmission good.And it is possible to the volume by controlling light transmission glue 150 so that the dotted back of the body
The light that light source 150 is sent out all enters back into the side of light transmission medium layer 120 by light transmission glue 140, avoids other biographies of light
Broadcast approach.
It in other embodiments, can also be spaced between dotted backlight 140 and the optical fingerprint sensor, i.e. point
Shape backlight 140 and the side of the optical fingerprint sensor are in direct contact.
In the present embodiment, though not shown in Fig. 1, in the display module, the light-emitting display panel is situated between with light transmission
There can be optical cement between matter layer 120.The material of the optical adhesive layer can be specifically temperature-sensitive optical adhesive layer, Photosensitive optical glue
Layer or optical double-sided adhesive tape band.The presence of the optical cement makes between the light-emitting display panel and light transmission medium layer 120 as possible
Avoid further improving the optical property of module there are air.
In the present embodiment, though not shown in Fig. 1, in the display module, light transmission medium layer 120 is sensed with optical finger print
There can be optical cement between device 130.The presence of the optical cement make light transmission medium layer 120 and optical fingerprint sensor 130 it
Between avoid further improving the optical property of module as possible there are air.
In other embodiments, the light-emitting display panel, the light transmission medium layer and the optical fingerprint sensor can
To be directly to be laminated between any two, the surface that " directly stacking " refers between two structures at least partly contacts, when three is total
Can be precisely that form is laminated as shown in fig. 1 when body is in flat structure.
It should be noted that on the sensitive pixel elements to first substrate 111 of the present embodiment setting optical fingerprint sensor
The distance on surface is smaller, to ensure so that the fingerprint image quality that fingerprint collecting obtains meets necessary requirement.
In the present embodiment, the area of the display pixel cells 1131 in OLED display panel is passed less than or equal to optical finger print
The area of sensitive pixel elements in sensor.
It, can be by a light-sensitive image in optical fingerprint sensor in the case of the first on the basis of above-mentioned area compares
The upper and lower position of a display pixel cells 1131 in plain unit and OLED display panel is mapped, to better ensure that
Subsequent fingerprint image acquisition.Specifically, can be by one display pixel cells 1131 of a sensitive pixel elements face, and enable
The areas of sensitive pixel elements and display pixel cells 1131 area equation (in fact, since light is always in oblique propagation,
Therefore, whether face does not have much affect to the present embodiment).The transparent area 11311 of display pixel cells 1131 is at least right
It should be in the photosensitive element of sensitive pixel elements.Due to the two area equation, so the two can not also use positive alignment one by one, mutually
Between can also have certain dislocation.From the point of view of macroscopically, pair of each sensitive pixel elements and display pixel cells 1131
Homogeneous relation is consistent, it is possible to ensure that transmitting (reflection) optical signal of each sensitive pixel elements received is uniform
's.
Can also be that multiple display pixel cells 1131 correspond to one under the second situation on the basis of above-mentioned area compares
A sensitive pixel elements.That is, can be the sensitive pixel elements can correspond to two or two with
Upper display pixel cells 1131 (i.e. area of the area of sensitive pixel elements less than display pixel cells 1131).From macroscopically
It sees, the alignment relation of each sensitive pixel elements and two or more display pixel cells 1131 is consistent, so
It can ensure that transmitting (reflection) optical signal of each sensitive pixel elements received is uniform.
Principle of the display module that the present embodiment is provided when carrying out fingerprint collecting be：What dotted backlight 140 was sent out
After light is by light transmission glue 150, enters from the side (side) of light transmission medium layer 120, then pass through light transmission medium layer 120, so
It retreads and is upwardly into second substrate 112, and enter the transparent area 11311 of self-luminescence circuit layer 113 from second substrate 112, then from
Transparent area 11311 enters first substrate 111 across self-luminescence circuit layer 113 obliquely；And in the present embodiment, first substrate
111 are directly used in the contact or pressing of finger print, therefore, the boundary that light can be formed in 111 upper surface of first substrate and fingerprint
The various optical phenomenas such as refraction, reflection and absorption occur at face, accordingly has part reflection light and generates；Reflection light returns to the
In one substrate 111, then enter from first substrate the transparent area 11311 of self-luminescence circuit layer 113 obliquely, and from transparent area
11311 pass through self-luminescence circuit layer 113 obliquely, hence into second substrate 112, then enter light transmission from second substrate 112 and are situated between
Matter layer 120 finally enters back into the fingerprint sensing circuit layer of optical fingerprint sensor 130, by fingerprint sensing from light transmission medium layer 120
Each sensitive pixel elements in circuit are received and (are specifically absorbed by the photosensitive element of sensitive pixel elements), at signal
Reason, realizes the acquisition of corresponding fingerprint image.
It in the above process, since dotted backlight 140 is located at 120 side of light transmission medium layer, is apparent from, corresponding light is from saturating
The side of optical medium layer 120 enters, and is then acute angle in the incidence angle of 112 lower surface of second substrate, light finally reflects
Afterwards, incidence angle of the reflection light in 130 upper surface of optical fingerprint sensor is also acute angle.Therefore, at this point, dotted backlight 140
The light sent out can generate corresponding fingerprint image by corresponding offset, and entire optical fingerprint sensor module need not be led
The structures such as tabula rasa and collector lens, it will be able to realize the identification of fingerprint image, also, the fingerprint image ratio formed uses light guide plate
The light source of structure is more clear.
It should be noted that by above-mentioned principle it is found that the present embodiment can control the light that dotted backlight 140 is sent out
It all propagates obliquely, has prevented light from directly after entering light transmission medium layer 120, propagating to optical fingerprint sensor downwards
130.Because once this circulation way occurs for light, the interference to fingerprint image acquisition will result in.
Though it should be noted that not shown in figure, the fingerprint identification function of display module, is such as scheming in order to better improve
It, can be in the region that 120 lower surface of light transmission medium layer is not laminated with optical fingerprint sensor 130, all in structure shown in 1
Covering light shield layer (and 120 lower surface of light transmission medium layer and 130 lamination area of optical fingerprint sensor then need to keep good
Light action).
In the display module that the present embodiment is provided, the optical fingerprint sensor and dotted backlight 140 are respectively positioned on certainly
112 lower section of second substrate in light emitting display panel, dotted backlight 140 are located at 120 side of light transmission medium layer again, while certainly
There is light emitting display panel transparent area therefore the light that dotted backlight 140 is sent out can be made to be shown back and forth through self-luminous
Panel, so as to realize the acquisition to finger fingerprint image, also, collected fingerprint image is clear, makes display module collection
At there is good fingerprint identification function.
In the present embodiment, the refractive index of light transmission medium layer 120 is always greater than the refractive index of air, also, the present embodiment
In, the light that dotted backlight 140 is sent out enters light transmission medium layer 120 from the side surface of light transmission medium layer 120.It is rolled over by increasing
The light transmission medium layer 120 that rate is more than air is penetrated, there are more light that can apply to fingerprint image acquisition, image is clear at this time
Degree will be improved.
In the display module that the embodiment of the present invention is provided, light is placed under light-emitting display panel (OLED display panel)
Fingerprint sensor is learned, and by corresponding application method, can realize and acquire fingerprint image in the display area of display module,
So as to reduce the electronic product apparent size using this display panel, the screen accounting of electronic product is improved, electronics is improved
The exterior aesthetics (such as the screen accounting of mobile phone products can be improved, improve the exterior aesthetics of mobile phone products) of product.
The embodiment of the present invention also provides a kind of application method of display module, and the display module is carried by previous embodiment
For therefore it may be referred to Fig. 1.By previous embodiment it is found that the display module includes light-emitting display panel, light transmission medium
Layer 120, optical fingerprint sensor 130 and dotted backlight 140.The light-emitting display panel includes first substrate 111, second
Substrate 112 and self-luminescence circuit layer 113.Self-luminescence circuit layer 113 is spontaneous between first substrate 111 and second substrate 112
Optical circuit layer 113 includes multiple display pixel cells 1131, and each display pixel cells 1131 include at least one alternatively non-transparent district
With at least one transparent area, the height of the transparent area is equal to the height of the self-luminescence circuit layer.Optical fingerprint sensor 130
Positioned at 120 lower section of light transmission medium layer.Dotted backlight 140 is located at 112 lower section of second substrate, and dotted backlight 140 is located at
The side of light transmission medium layer 120.The light that dotted backlight 140 is sent out is with angle obliquely, from the side of light transmission medium layer 120
Face enters light transmission medium layer 120, and enters second substrate 112 obliquely from light transmission medium layer 120.More related display moulds
The structure and property of group can refer to previous embodiment corresponding contents.
The application method that the present embodiment is provided includes：It will be opposite with optical fingerprint sensor in light-emitting display panel
Display area is defined as the first display area, and the display area of other parts is defined as the second display area；When optical finger print passes
When sensor carries out fingerprint image acquisition work, the first display area of control stops showing work.
In the present embodiment, the first display area is set, is the light of light-emitting display panel and dotted backlight in order to prevent
The light that source 140 is sent out interferes with each other.Stop showing that work, the present embodiment can allow to carry out by controlling the first display area
When fingerprint image acquisition, do not influenced by light-emitting display panel.
The application method that the present embodiment is provided further includes：When optical fingerprint sensor carries out fingerprint image acquisition work
When, the second display area of control shows information associated with fingerprint image acquisition work.For example, being shown in the second display area
" please in non-display area typing fingerprint " shows the letters such as " typing is correct " or " please typing again " in fingerprint Input Process
Breath can show information such as " effective fingerprints " when collecting correct fingerprint, or show according to fingerprinting operation " operate at
The message such as work(".This application method enables to display function and fingerprint identification function to cooperate, and realizes and preferably uses
Family usage experience.
The application method can also further open up the application scenarios of fingerprint identification function, for example, being passed in optical finger print
Before sensor is not worked, first display area is enabled to show that corresponding display icon, instruction user place a digit into figure
In mark.After user places a digit into display figure target area, using existing display panel itself or the touch-control work(of tyre
Can, perception user has placed a digit into the first display area, enters work shape so as to control optical fingerprint sensor
State completes fingerprint image at this point, the fingerprint image of pressing fingerprint can be acquired by the optical fingerprint sensor below the first display area
As acquisition function, and it is possible to further apply to be identified with the existing fingerprint image of internal reservoir, further use into
The functions such as row encryption/unlock.
Another embodiment of the present invention provides another display module, please refers to Fig.2.
The display module includes that protective layer 210, light-emitting display panel (not marking), light transmission medium layer 230, optics refer to
Line sensor 240 and dotted backlight 250.
In the display module, light-emitting display panel includes first substrate 221, second substrate 222 and self-luminescence circuit
Layer 223.Self-luminescence circuit layer 223 is between first substrate 221 and second substrate 222.Light-emitting display panel further includes close
Seal structure 224.Sealing structure 224 also is located between first substrate 221 and second substrate 222.Sealing structure 224 and first substrate
221 and second substrate 222 together, self-luminescence circuit layer 223 is sealed between first substrate 221 and second substrate 222.
In the display module, protective layer 210 is located at 221 top of the first substrate.With in Fig. 1 directly use the first base
Plate 111 is different as the structure that finger contacts, in the present embodiment, the structure contacted as finger using protective layer 210, and protect
Sheath 210 can play the structures such as protection light-emitting display panel, optical fingerprint sensor 240 and dotted backlight 250 simultaneously
Effect.
In the present embodiment, protective layer 210 is single layer structure, i.e., protective layer 210 can be a substrate, as shown in Figure 2.Its
In its embodiment, protective layer may be multilayered structure.
In the present embodiment, the material of first substrate 221 and second substrate 222 can be transparent material.
In the light-emitting display panel, self-luminescence circuit layer 223 (is used including multiple display pixel cells 2231 in Fig. 2
Dotted line frame illustrates the neighbouring relations of display pixel cells 2231).Each display pixel cells 2231 include at least one non-
Light area and at least one transparent area 22311 illustrate a transparent area 22311 (i.e. one of 22311 institute of transparent area in Fig. 2
Shown in the range that minimum dotted line frame is surrounded in range such as Fig. 2).
In the present embodiment, the light-emitting display panel is OLED display panel, and it is accordingly interior to can refer to Fig. 1 corresponding embodiments
Hold.
Height of the height equal to self-luminescence circuit layer 223 of transparent area 22311 is arranged in the present embodiment, as shown in Fig. 2, to
Ensure that light can pass through self-luminescence circuit layer 223 from transparent area.And light can pass through self-luminescence circuit layer from transparent area
223, it ensure that display module can carry out fingerprint image acquisition.
The concrete structure of display pixel cells 2231 can refer to Fig. 1 corresponding embodiment corresponding contents.
As shown in Fig. 2, optical fingerprint sensor 240 is located at the lower section of light transmission medium layer 230.That is, light transmission medium
Layer 230 is between the light-emitting display panel and optical fingerprint sensor 240.
(do not show as shown in Fig. 2, optical fingerprint sensor 240 includes fingerprint sensing circuit layer (not shown) and underlay substrate
Go out).
The fingerprint sensing circuit layer of optical fingerprint sensor 240 includes multiple sensitive pixel elements (not shown), more
More structures can refer to Fig. 1 corresponding embodiment corresponding contents.
In the present embodiment, dotted backlight 250 is located at 222 lower section of second substrate, also, dotted backlight 250 is located at thoroughly
The side of optical medium layer 230, the light that dotted backlight 250 is sent out is with angle obliquely, from the side of light transmission medium layer 230
Enter the second substrate 222 obliquely into light transmission medium layer 230, and from light transmission medium layer 230.
Dotted backlight 250 is set to 222 lower section of second substrate by the present embodiment, and is set to light transmission medium layer 230
Side, can ensure the reflection light for acquiring fingerprint image, must be with the angle of oblique incidence enter optical finger print pass
Sensor 240 (it is i.e. incident obliquely to enter optical fingerprint sensor 240, detailed process can refer to Fig. 1 corresponding embodiments accordingly in
Hold).For the area source using light guide plate, the setting of this dotted backlight 250 enables to light substantially along same
One direction offset (and the light of light guide plate is that all directions are mixed and disorderly, and offset direction is differed), avoids the phase between light
It mutually interferes and influences each other (and can interfere with each other and influence between the light of light guide plate), also, apart from dotted backlight 250
It is close to set similar light offset, so as to obtain clearly fingerprint image, improves the fingerprint recognition performance of module.
In the present embodiment, dotted backlight 250 can be a LED light.The light of the LED light can be black light,
Purple light, blue light, green light, sodium yellow, red light, near infrared light or white light.
It should be noted that in other embodiments, dotted backlight can be more than two LED light, more than two LED light
It is evenly distributed on the lower section of second substrate, the light of LED light is black light, purple light, blue light, green light, sodium yellow, red
Light, near infrared light or white light.For example, the dotted backlight can be four LED light, four LED light are evenly distributed on the
The lower section of two substrates, and be evenly distributed on simultaneously positioned at each different side of light transmission medium layer 230 or four lamps
Four angles of optical medium layer 230.At this point, although the light that four LED light are sent out may be each non-parallel light, simultaneously
Using this four LED light, may be implemented to it is non-parallel smooth when pattern distortion correction.Specifically, four LED light can be taken
Adopt in turn figure (adopt in turn figure refer to four lamps chronologically successively carry out adopting figure respectively) mode done abnormal then by image procossing
Become correction, improve fingerprint image quality, improves fingerprint recognition accuracy.Certainly, when dotted backlight be multiple LED light the case where
Under, when carrying out fingerprint image acquisition, the light of any one LED light can be selected as the imaging light of fingerprint image, this
When the present embodiment it is similar with the imaging effect of Fig. 1 corresponding embodiments.
As shown in Fig. 2, in the display module, in dotted backlight 250 and 222 lower surface of second substrate and light transmission medium
There is light transmission glue 260, the light that dotted backlight 250 is sent out to enter from the light-emitting surface of dotted backlight 250 saturating for the side of layer 230
Optical cement 260, then from light transmission glue 260 into the side of light transmission medium layer 230.The setting of light transmission glue 260 can make dotted backlight
250 light sent out are more preferably incident to the side of light transmission medium layer 230, reduce interface reflection, the refraction of light transmission glue 260
Rate is more than 1, reduces the refraction amplitude into the light of light transmission medium layer 230.And if being not provided with light transmission glue, dotted backlight hair
The light gone out needs after vacuum or air, enters back into light transmission medium layer, and light is in vacuum or air and light transmission medium
The interface that layer side is formed is easier to there is a situation where reflecting, and air can also make some light that the unfavorable shadows such as scattering occur
It rings.
In the display module, there is interval (not marking) between dotted backlight 250 and optical fingerprint sensor 240,
It can be with 1 corresponding embodiment corresponding contents of reference chart.
In the present embodiment, though not shown in Fig. 2, in the display module, the light-emitting display panel is situated between with light transmission
There can be optical cement between matter layer 230, it can be with 1 corresponding embodiment corresponding contents of reference chart.
In the present embodiment, though it is not shown in Fig. 2, in the display module, the light-emitting display panel and protective layer
Can have optical cement, the presence of the optical cement to avoid between the light-emitting display panel and protective layer 210 between 210
There are the possibility of air, so that the optical property of display module is more preferable.
It should be noted that OLED display panel and optical fingerprint sensor 240 be directly laminated or with optics gluing
In the case of conjunction, the present embodiment be arranged optical fingerprint sensor 240 sensitive pixel elements to 221 upper surface of first substrate away from
From smaller, to ensure so that the fingerprint image quality that fingerprint collecting obtains meets necessary requirement.
In the present embodiment, though do not shown in figure, can by optical fingerprint sensor 240 sensitive pixel elements and
The upper and lower position of display pixel cells 2231 in OLED display panel is mapped, to better ensure that subsequent fingerprint image
As acquisition.One sensitive pixel elements can be corresponded to four display pixel cells 2231, and enable the area of sensitive pixel elements
Equal to the area of four display pixel cells 2231.
The display module that the present embodiment is provided is when carrying out fingerprint collecting, principle major part and Fig. 1 corresponding embodiments
Principle it is identical, the difference is that, light will continue to before not reaching finger print from first substrate in the present embodiment
Refraction and instead occurs for the 221 oblique interfaces for travelling over to protective layer 210, and being formed in 210 upper surface of protective layer and finger print
It the optical phenomenas such as penetrates, then generates the reflection light for returning to protective layer 210 obliquely again.
In the present embodiment, between 222 lower surface of light transmission glue 260 and second substrate have light shield layer 270, light shield layer 270,
It can refer to Fig. 1 corresponding embodiment corresponding contents.
It should be noted that in other embodiments, can have collector lens, optically focused before the light-emitting surface of dotted backlight
Lens can make the light of dotted backlight be converted to directional light or nearly directional light, and (the nearly directional light refers to the angle between light
Difference is less than 10 degree), the light of dotted backlight is introduced into collector lens, enters back into light transmission medium layer.The setting of collector lens
It can further avoid the problem of fingerprint image is distorted.
The structure and advantage for the display module that more the present embodiment are provided can be accordingly interior with 1 corresponding embodiment of reference chart
Hold.
Another embodiment of the present invention also provides the application method of another display module, and the display module is previous implementation
Example is provided, therefore it may be referred to Fig. 2.By previous embodiment it is found that the display module includes protective layer 210, self-luminous shows
Show panel, light transmission medium layer 230, optical fingerprint sensor 240 and dotted backlight 250.The light-emitting display panel includes
First substrate 221, second substrate 222 and self-luminescence circuit layer 223.Self-luminescence circuit layer 223 is located at first substrate 221 and second
Between substrate 222, self-luminescence circuit layer 223 includes multiple display pixel cells 2231, and each display pixel cells 2231 include
At least one alternatively non-transparent district and at least one transparent area, the height of the transparent area are equal to the height of the self-luminescence circuit layer.
Optical fingerprint sensor 240 is located at 230 lower section of light transmission medium layer.Dotted backlight 250 is located at 222 lower section of second substrate, and
Dotted backlight 140 is located at the side of light transmission medium layer 120.The light that dotted backlight 250 is sent out with angle obliquely, from
The side of light transmission medium layer 230 enters light transmission medium layer 230, and enters second substrate 222 obliquely from light transmission medium layer 230.
More the structure in relation to the display module and property can refer to previous embodiment corresponding contents.
The application method that the present embodiment is provided includes：By in light-emitting display panel with 240 phase of optical fingerprint sensor
To display area be defined as the first display area, the display area of other parts is defined as the second display area；When optics refers to
When line sensor 240 carries out fingerprint image acquisition work, the first display area of control stops showing work.
Stop showing work by controlling the first display area, when the present embodiment can allow to carry out fingerprint image acquisition,
It is not influenced by light-emitting display panel.
The application method that the present embodiment is provided further includes：When optical fingerprint sensor 240 carries out fingerprint image acquisition work
When making, the second display area of control shows information associated with fingerprint image acquisition work.For example, aobvious in the second display area
Show " please in non-display area typing fingerprint ", in fingerprint Input Process, shows " typing is correct " or " please typing again " etc.
Information can show information such as " effective fingerprints ", or show " operation according to fingerprinting operation when collecting correct fingerprint
The message such as success ".This application method enables to display function and fingerprint identification function to cooperate, and realizes better
User experience.
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of display module, including：
Light-emitting display panel, the light-emitting display panel include first substrate, second substrate and self-luminescence circuit layer, described
For self-luminescence circuit layer between the first substrate and the second substrate, the self-luminescence circuit layer includes multiple display pictures
Plain unit；
It is characterized in that,
Each display pixel cells include at least one alternatively non-transparent district and at least one transparent area；
Further include：
Light transmission medium layer；
Optical fingerprint sensor, the optical fingerprint sensor are located at below the light transmission medium layer；
Dotted backlight, the dotted backlight are located at below second substrate, and the dotted backlight is located at the light transmission medium
The side of layer, the light that the dotted backlight is sent out enter institute with angle obliquely, from the side of the light transmission medium layer
Light transmission medium layer is stated, and enters the second substrate obliquely from the light transmission medium layer.
2. display module as described in claim 1, which is characterized in that further include protective layer, the protective layer is located at described the
Above one substrate.
3. display module as claimed in claim 1 or 2, which is characterized in that the second substrate lower surface is close to described dotted
The region of backlight further includes light shield layer.
4. display module as claimed in claim 3, which is characterized in that the side of the dotted backlight and the light transmission medium layer
There is light transmission glue, the light that the dotted backlight is sent out to enter the light transmission from the light-emitting surface of the dotted backlight between face
Glue, then from the light transmission glue into the side of the light transmission medium layer.
5. display module as claimed in claim 4, which is characterized in that the side of light transmission medium layer described in the light transmission glue sticking
With the light shield layer lower surface.
6. display module as claimed in claim 1 or 2, which is characterized in that have before the light-emitting surface of the dotted backlight
Collector lens, the collector lens can make the light of the dotted backlight be converted to directional light or nearly directional light, the point
The light of shape backlight is introduced into the collector lens, enters back into the side of the light transmission medium layer.
7. display module as claimed in claim 2, which is characterized in that the light-emitting display panel is passed with the optical finger print
There is optical cement between sensor；There is optical cement between the light-emitting display panel and the protective layer.
8. display module as claimed in claim 1 or 2, which is characterized in that the dotted backlight is a LED light, described
The light of LED light is black light, purple light, blue light, green light, sodium yellow, red light, near infrared light or white light；Alternatively,
The dotted backlight is more than two LED light, and described two above LED light are evenly distributed on the lower section of the second substrate,
The light of the LED light is black light, purple light, blue light, green light, sodium yellow, red light, near infrared light or white light.
9. a kind of application method of display module, which is characterized in that
The display module includes：
Light-emitting display panel, the light-emitting display panel include first substrate, second substrate and self-luminescence circuit layer, described
For self-luminescence circuit layer between the first substrate and the second substrate, the self-luminescence circuit layer includes multiple display pictures
Plain unit, each display pixel cells include at least one alternatively non-transparent district and at least one transparent area；Light transmission medium layer；Light
Fingerprint sensor is learned, the optical fingerprint sensor is located at below the light transmission medium layer；Dotted backlight, the dotted backlight
Source is located at below second substrate, and the dotted backlight is located at the side of the light transmission medium layer, and the dotted backlight is sent out
Light with angle obliquely, enter the light transmission medium layer from the side of the light transmission medium layer, and be situated between from the light transmission
Matter layer enters the second substrate obliquely；
The application method includes：
Display area opposite with the optical fingerprint sensor in the light-emitting display panel is defined as the first viewing area
The display area in domain, other parts is defined as the second display area；
When the optical fingerprint sensor carries out fingerprint image acquisition work, controls first display area and stop being shown
Show work.
10. application method as claimed in claim 9, which is characterized in that further include：When the optical fingerprint sensor is referred to
When print image collecting work, controls second display area and show information associated with fingerprint image acquisition work.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611131218.6A CN108614982A (en) | 2016-12-09 | 2016-12-09 | Display module and its application method |
| PCT/CN2017/073609 WO2018103193A1 (en) | 2016-12-09 | 2017-02-15 | Display module and usage method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611131218.6A CN108614982A (en) | 2016-12-09 | 2016-12-09 | Display module and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108614982A true CN108614982A (en) | 2018-10-02 |
Family
ID=62491765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611131218.6A Pending CN108614982A (en) | 2016-12-09 | 2016-12-09 | Display module and its application method |
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| Country | Link |
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| CN (1) | CN108614982A (en) |
| WO (1) | WO2018103193A1 (en) |
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| WO2018103193A1 (en) | 2018-06-14 |
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