CN109426790A - Display module - Google Patents
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- CN109426790A CN109426790A CN201710776536.6A CN201710776536A CN109426790A CN 109426790 A CN109426790 A CN 109426790A CN 201710776536 A CN201710776536 A CN 201710776536A CN 109426790 A CN109426790 A CN 109426790A
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- display panel
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
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- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A kind of display module, comprising: light source, for generating initial light；Ducting layer is located at the light source side, is used for transmission the initial light, and initial light described in scattered portion forms incident light；Sensing face, the incident light form the reflected light for carrying finger print information in the sensing face；Light-emitting display panel, the side positioned at the ducting layer far from the sensing face, light-emitting display panel described in the reflection light transmission；Optical sensor, the reflected light for light-emitting display panel described in acquisition of transmission is to obtain fingerprint image.It limits the spread scope of the initial light using ducting layer, improves and hide display effect, preferably realize the integrated of fingerprint recognition and image display function.
Description
Technical field
The present invention relates to fingerprint imaging field, in particular to a kind of display module.
Background technique
Fingerprint identification technology collects the fingerprint image of human body by fingerprint imaging sensor, then with fingerprint recognition system
In have fingerprint imaging information be compared, to realize identification.It is unique due to the convenience that uses and somatic fingerprint
Property, fingerprint identification technology have been widely used in the consumer electronics fields such as every field, especially PC and mobile phone, fingerprint
The use of identification technology can greatly improve the safety and convenience of electronic product.
Imaging mode used by fingerprint identification technology has the multiple technologies such as optical profile type, condenser type, ultrasonic type.It is consuming
In electronic product, when fingerprint imaging mould group is set to mobile phone front, with display location when ipsilateral, occupied by fingerprint imaging mould group
Area will affect the raising of electronic product screen accounting, therefore propose requirement to fingerprint imaging mould group and display screen are integrated.It is existing
There is the fingerprint imaging mould group integrated with display screen, generallys use capacitive technology.But in contrast, optical fingerprint is imaged
Technology has the advantages such as better imaging effect, lower equipment cost.
When optical fingerprint imaging modules and display screen, which integrate, constitutes display module, setting effect is hidden often not
Ideal, customer experience is not friendly enough, affects the integrated result of fingerprint recognition and image display function.
Summary of the invention
Problems solved by the invention is to provide a kind of display module, hides setting effect to improve, preferably realizes fingerprint
Identification is integrated with image display function.
To solve the above problems, the present invention provides a kind of display module, comprising:
Light source, for generating initial light；Ducting layer is located at the light source side, is used for transmission the initial light, and scatter
The part initial light forms incident light；Sensing face, the incident light form in the sensing face and carry finger print information
Reflected light；Light-emitting display panel, the side positioned at the ducting layer far from the sensing face, described in the reflection light transmission from
Light emitting display panel；Optical sensor, the reflected light for light-emitting display panel described in acquisition of transmission is to obtain fingerprint image.
Optionally, the light-emitting display panel includes multiple display pixels；The optical sensor includes multiple photosensitive
Pixel；In the sensing face, the projected area of the photosensitive pixel is greater than or equal to the projected area of the display pixel.
Optionally, in the sensing face, the ratio of the photosensitive pixel projected area and the display pixel projected area
Value is in 1:1 to 9:1 range.
Optionally, the display pixel includes transparent area and alternatively non-transparent district；The reflected light transmits institute through the transparent area
State light-emitting display panel.
Optionally, in the display pixel, the transparent area area accounting is no less than 0.5%.
Optionally, the light-emitting display panel includes the first substrate being oppositely arranged, the second substrate and is located at described
Self-luminous display circuit between first substrate and the second substrate；The ducting layer is located at the first substrate or second base
Side of the plate far from the self-luminescence circuit；The refractive index of the waveguide layer material is greater than the first substrate or second base
The refractive index of plate material.
Optionally, the refractive index of the waveguide layer material is in 1.4 to 1.7 ranges.
Optionally, the ducting layer fits in the first substrate or the second substrate by vacuum abutted mode
On；Alternatively, the ducting layer is by UV sticker together on the first substrate or the second substrate.
Optionally, the light-emitting display panel further include: cover sheet is located at the first substrate or the second substrate
On；The cover sheet is the ducting layer；The cover sheet is the sensing face backwards to the surface of the self-luminescence circuit.
Optionally, the light-emitting display panel further include: multiple spacer columns are located at the first substrate and described second
Between substrate；The reflected light transmits the light-emitting display panel through spacer column conduction.
Optionally, the light-emitting display panel includes: multiple display pixels, and the display pixel includes transparent area and non-
Transparent area；The spacer column is located at display pixel transparent area corresponding position.
Optionally, the first substrate and the second substrate are flexible base board.
Optionally, the first substrate and the material of the second substrate are polyimide plastic or poly terephthalic acid class
Plastics.
Optionally, the light-emitting display panel is OLED display panel.
Optionally, the light source is black light light source.
Optionally, the light source generates the wavelength of initial light in 700nm to 1000nm range.
Optionally, the ducting layer being projected as in the sensing face is rectangular；The light source includes two optical waveguide letters
Number source, described two optical waveguide signal sources are located at two adjacent corner positions of the ducting layer.
Optionally, the ducting layer being projected as in the sensing face is rectangular, has orthogonal first side and the
Two sides；The light source includes multiple first optical waveguide signal sources and multiple second optical waveguide signal sources；The multiple first light wave
It is arranged in parallel along first side to lead signal source；The multiple second optical waveguide signal source is arranged in parallel along second side.
Compared with prior art, technical solution of the present invention has the advantage that
The ducting layer constrains the initial light in the way of total reflection, controls the spread scope of the initial light, only
There is finger pressing when in the sensing face, initial light can just occur to reflect and be reflected in the sensing face；There is not finger
When pressing, initial light is totally reflected in the ducting layer；Therefore the initial light, Neng Gouyou are transmitted by the ducting layer
Intensity of the effect control from the sensing face emergent ray；The control of emergent ray intensity in the sensing face, can effectively improve
Setting effect is hidden, can be effectively reduced and effect is shown to the light-emitting display panel image for the light of fingerprint image acquisition
The influence of fruit is conducive to preferably realize the integrated of fingerprint recognition and image display function.
In optinal plan of the present invention, the light source is black light light source；Specifically, the light source generates the wave of initial light
It grows in 700nm to 1000nm range.Black light light source is set by the light source, makes the initial light black light, energy
The influence of light flashing is enough effectively reduced, improves and hides setting effect, but also can be effectively reduced the initial light to described
The influence of light-emitting display panel display effect, so as to realize the integrated of fingerprint recognition and image display function well.
In optinal plan of the present invention, the light-emitting display panel includes cover sheet；The cover sheet can be used as
The ducting layer, to constrain the spread scope of the initial light；Furthermore the cover sheet can be also used for protecting described spontaneous
The hardware device of the display modules such as light display panel, the optical sensor and the light source, it is described aobvious so as to simplification
The structure for showing mould group is conducive to the thinning of the display module, is conducive to preferably realize fingerprint recognition and image display function
It is integrated.
In optinal plan of the present invention, the light-emitting display panel further include: multiple spacer columns are located at the first substrate
Between the second substrate；The reflected light transmits the light-emitting display panel through spacer column conduction.The interval
Column can either realize the formation being spaced between the first substrate and the second substrate, guarantee the first substrate and described
The uniformity being spaced between two substrates；The reflected light can be conducted again, to improve self-luminous described in the reflection light transmission
The transmissivity of display panel can effectively improve the light intensity of the acquired reflected light of the optical sensor, be conducive to be referred to
The improvement of print image quality is conducive to preferably realize the integrated of fingerprint recognition and image display function.
In optinal plan of the present invention, the light-emitting display panel includes multiple display pixels；The optical sensor packet
Include multiple photosensitive pixels；In the sensing face, the projected area of the photosensitive pixel is greater than or equal to the display pixel
Projected area, therefore a sensitive pixel elements reflected light collected is to transmit the reflected light institute shape of at least one display pixel
At, it can be ensured that the accuracy and accuracy of the obtained fingerprint image of the optical sensor, are conducive to better reality
Existing image shows integrated with fingerprint imaging function.
Detailed description of the invention
Fig. 1 is a kind of the schematic diagram of the section structure of optical fingerprint imaging modules；
Fig. 2 is that the invention shows the schematic diagram of the section structure of one embodiment of mould group；
Fig. 3 is in display module embodiment shown in Fig. 2 along the overlooking structure diagram in the direction A；
Fig. 4 is the enlarged structure signal of display pixel described in display module embodiment shown in Fig. 2 and the photosensitive pixel
Figure；
Fig. 5 is that the invention shows the overlooking structure diagrams of another embodiment of mould group.
Specific embodiment
It can be seen from background technology that the display module of prior art integrating fingerprint identification function often exists and hides setting effect
Fruit is bad, the disagreeableness problem of customer experience.
With reference to Fig. 1, a kind of the schematic diagram of the section structure of optical fingerprint imaging modules is shown.
The fingerprint imaging mould group specifically includes that cover sheet 13, optical sensor 12, integrated chip (are not shown in figure
Out), the light source (not shown) in circuit board (not shown) and circuit board, light guide plate 11, upper protection shell be (in figure not
Show) and the main components such as lower protection shell (not shown).Wherein optical sensor 12 is brilliant using amorphous silicon membrane
Body pipe (a-Si TFT), low-temperature polysilicon film transistor (LTPS TFT) or oxide semiconductor thin-film transistor (OS TFT)
Etc. semiconductor process techniques, make on the glass substrate；Encapsulation is realized by the processes such as cutting, dispensing, bonding later.
Optical fingerprint imaging modules are to realize fingerprint imaging by photoelectricity transformation principle.When the pressing of finger 10 is being protected
When on cover board 13, incident light caused by light source and light guide plate 11 is reflected in finger 10 and the contact interface of cover sheet 13
And refraction；On reflected light projects to optical sensor 12, photoelectric conversion and signal processing are carried out, to obtain fingerprint image.
Wherein, light source is usually LED light, and light source type is generally visible light or near infrared light, therefore existing described
It can be appreciated that light flashes above cover sheet 13, affect the hiding setting of fingerprint imaging mould group；Especially when with display screen collection
When at constituting display module, the flashing of light can also be impacted the display effect of display screen, to be unfavorable for display module
Preferable display effect is presented.
To solve the technical problem, the present invention provides a kind of display module, limits the initial light using ducting layer
Spread scope, the hiding display effect of improvement, better realization fingerprint recognition and image display function integrate.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
With reference to Fig. 2, show that the invention shows the schematic diagram of the section structure of one embodiment of mould group.
The display module includes:
Light source 110, for generating initial light 121；Ducting layer 120 is located at 110 side of light source, is used for transmission described
Initial light 121, and initial light 121 described in scattered portion forms incident light 122；Sensing face 130, the incident light 122 is described
The reflected light 123 for carrying finger print information is formed in sensing face 130；Light-emitting display panel 140 is located at the ducting layer 120
Side far from the sensing face 130, the reflected light 123 transmit the light-emitting display panel 140；Optical sensor 150,
Reflected light for light-emitting display panel 140 described in acquisition of transmission is to obtain fingerprint image.
The ducting layer 120 constrains the initial light 121 in the way of total reflection, controls the biography of the initial light 121
Range is broadcast, when in the sensing face 130, initial light 121 can just reflect in the sensing face 130 for only finger pressing
And reflection；When not there is finger pressing, initial light 121 is totally reflected in the ducting layer 120；Therefore pass through the waveguide
The 120 transmission initial light 121 of layer, can effectively control the intensity from 130 emergent ray of sensing face；The sensing face
The control of emergent ray intensity on 130 can effectively improve and hide setting effect, can be effectively reduced for fingerprint image acquisition
Influence of the light to 140 image display effect of light-emitting display panel, be conducive to preferably realize fingerprint recognition and figure
As integrating for display function.
The specific technical solution of the display module embodiment is described in detail with reference to the accompanying drawing.
The light source 110 is for generating initial light 121.
In the present embodiment, the light source 110 is black light light source, that is to say, that the initial light 121 is invisible
Light.It sets the light source 110 to the way of black light light source, can be effectively reduced the influence of light flashing, improve and hide
Effect is set, but also can be effectively reduced the initial light 121 to the shadow of 140 display effect of light-emitting display panel
It rings, so as to realize the integrated of fingerprint recognition and image display function well.
Specifically, the light source 110 is infrared light supply (for example including infrared light-emitting diode), the initial light 121 is
Infrared light.Initial light 121 produced by the light source 110 is near infrared light of the wavelength in 700nm to 1000nm range.Due to red
External signal has high stability, to the stronger advantage of adaptability of environmental change (temperature, humidity etc.), therefore by the light source
110 are set as the way of infrared light supply, the stability of 121 signal of initial light can be effectively improved, to be conducive to improve
The temperature of the display module fingerprint identification function.
In conjunction with reference Fig. 3, show in display module embodiment shown in Fig. 2 along the overlooking structure diagram in the direction A.
In the present embodiment, the light source 110 includes multiple first optical waveguide signal sources 111 and multiple second optical waveguide signals
Source 112；The multiple first optical waveguide signal source 111 is arranged along first direction X, the multiple second broadcast signal source, 112 edge
Second direction Y arrangement, the second direction Y are mutually perpendicular to the first direction X.
Specifically, the first optical waveguide signal source 111 and the second optical waveguide signal source 112 can be light-emitting diodes
Pipe, it can be infrared light-emitting diode, that is to say, that the light source 110 is dotted discrete light source.
With continued reference to Fig. 2, the ducting layer 120 is located at 110 side of light source, is used for transmission the initial light 121 simultaneously
Initial light 121 described in scattered portion forms incident light 122；For receiving touch, the incident light 122 exists the sensing face 130
The reflected light 123 for carrying finger print information is formed in the sensing face 130；The light-emitting display panel 140 can show dynamic
The image of state or static state, for realizing the display module electrical image display function；The optical sensor 150 acquires described
Reflected light 123 is to obtain the fingerprint image.
Since the ducting layer 120 can constrain the initial light 121, to control the propagation model of the initial light 121
It encloses, the initial light 121 is propagated with the direction of the parallel sensing face 130, and the especially described initial light 121 is in the ducting layer
It is totally reflected, therefore is transmitted by the ducting layer 120 described on 120 surfaces far from 150 side of optical sensor
Initial light 121 can effectively control the intensity from 130 emergent ray of sensing face, can effectively improve and hide setting effect,
It can be effectively reduced influence of the light for fingerprint image acquisition to 140 image display effect of light-emitting display panel,
Be conducive to preferably realize the integrated of fingerprint recognition and image display function.
The sensing face 131 is located at side of the ducting layer 120 far from the light-emitting display panel 140；Towards institute
The incident light 122 for stating the projection of sensing face 130 is that the part initial light 121 is formed by scattering, formed incident light 122
Light intensity is smaller；And the incident light 122 in the sensing face 130 it also occur that reflection and refraction, therefore from the sensing
122 light intensity of incident light that face 130 is emitted is smaller, so carrying out from the sensing face 130 far from 150 side of optical sensor
When fingerprint sensing, it can be seen that the light intensity of emergent ray is smaller, i.e., sees light flashing above the fingerprint imaging mould group
Possibility is lower, hides setting effect to be conducive to improve, additionally it is possible to reduce for fingerprint image acquisition to light to described
The influence of spontaneous display panel image display effect, so as to preferably realize the collection of fingerprint recognition and image display function
At.
As shown in Fig. 2, the incident light 122 is that the part initial light 121 is scattered and formed by the ducting layer 120
's.The ducting layer 120 is random to the scattering of the initial light 121, it may be possible to which 120 material atom of ducting layer is to institute
State the scattering of initial light 121, it is also possible to scattering of the crystal boundary to the initial light 121 in the ducting layer 120.Due to scattering
Randomness, to make the light intensity for being projected to incident light 122 in the sensing face 130 be evenly distributed, and the incident light 122
The incident angle being projected in the sensing face 130 is also random distribution.
When not having finger in the sensing face 130,130 surface of sensing face is uniform air layer, the incidence
Reflection occurs for light 122 be formed by the light distribution of reflected light 123 in the sensing face 130 to be uniform；When finger presses
When in the sensing face 130, since finger surface is there are oil layer, the refractive index of oil layer is greater than the refractive index of air layer,
So while the light distribution for being projected to incident light 122 in the sensing face 130 is uniform, but formed reflected light 123
Light intensity can be modulated by the distribution of finger surface fingerprint, to form the reflected light for carrying finger print information.
Specifically, the light-emitting display panel includes the first substrate 141 being oppositely arranged, the second substrate 142 and position
Self-luminous display circuit 143 between the first substrate 141 and the second substrate 142；The ducting layer 120 is located at described the
The side of one substrate 141 or the second substrate 142 far from the self-luminescence circuit 143；The refraction of 120 material of ducting layer
Rate is greater than the refractive index of 142 material of the first substrate 141 or the second substrate.
In the present embodiment, the first substrate 141 is located at the self-luminescence circuit 143 far from the optical sensor 150
Side, the second substrate 142 is between the self-luminescence circuit 143 and the optical sensor 150；So the wave
Conducting shell 120 is located at side of the first substrate 141 far from the self-luminescence circuit 143.
It should be noted that the light-emitting display panel 140 can be OLED display panel, described in the present embodiment
The display pixel cells of self-luminescence circuit layer may include anode layer, hole injection layer (HIL), luminescent layer (EML), electron injection
The layer structure such as (EIL) and cathode layer, can also have hole transmission layer (HTL) and electron transfer layer (ETL), can also include driving
The TFT of dynamic OLED, the driving structures such as metal wire and storage capacitance.The specific technical solution of the light-emitting display panel 140 with
The prior art is identical, and details are not described herein by the present invention.
The first substrate 141 and the second substrate 142 are flexible base board.Due to the flexible base board material often
It is high molecular polymer, toughness with higher is also not susceptible to breakage in the lesser situation of thickness, can effectively reduce institute
The thickness of display module is stated, and guarantees yield；And the thickness of flexible base board is usually smaller, the optical path of light transrnissive flexible substrate
Length is shorter, therefore sets the first substrate 141 and the second substrate 142 to the way of flexible base board, can be effective
The scattering in 123 transmission process of reflected light is reduced, the noise for improving the obtained signal of the optical sensor 150 is conducive to
Than.
In the present embodiment, the material of the first substrate 141 and the second substrate 142 is polyimides
(Polyimide, PI) plastics or poly terephthalic acid class (Polyethylene Terephthalate, PET) plastics.
Polyimide plastic or it is poly- there is preferable mechanical performance to stupid diformazan acids plastics, stronger toughness, though
Under the lesser thickness of thickness, it is also able to maintain lesser breakage rate, mould group thickness can be effectively reduced, additionally it is possible to remain preferable
Manufacturing yield；In addition, polyimide plastic or it is poly- also there is preferable thermal stability to stupid diformazan acids plastics, can be resistant to height
Temperature, the various process conditions being able to bear during semiconductor fabrication process, advantageously ensures that device performance, is conducive to preferably
It realizes the integrated of fingerprint recognition and image display function, is conducive to the technical requirements for taking into account high yield and small thickness；Moreover, polyamides
Imines plastics or it is poly- to stupid diformazan acids plastics, there are also preferable isolation performances, steam can be effectively prevent to penetrate into described aobvious
Show module internal, is conducive to the raising of formed display module stability.
Specifically, the refractive index of 120 material of ducting layer is in 1.4 to 1.7 ranges.By the material of the ducting layer 120
When material is set as material of the refractive index in 1.4 to 1.7 ranges, the refractive index of 120 material of ducting layer is greater than baseplate material
Refractive index, so as to guarantee the initial light 121 the interface of the ducting layer 120 and the first substrate 141 send out
Raw total reflection, to guarantee that the ducting layer 120 to the restriction ability of the initial light 121, guarantees the effect for hiding setting, drop
It is integrated with fingerprint identification function preferably to realize that image is shown for the low influence to image display function.
The ducting layer 120 can fit in the first substrate 141 or described second by vacuum abutted mode
On substrate 142.In the present embodiment, the ducting layer 120 is mounted directly on the first substrate 141 and shows backwards to the self-luminous
On the surface of circuit 143.In other embodiments of the invention, the ducting layer is by UV sticker together in the first substrate or described
In the second substrate, i.e., the described ducting layer, which passes through, also has UV between UV glue and the first substrate or the surface of the second substrate
Glue.
As shown in Fig. 2, in the present embodiment, the light-emitting display panel further include: cover sheet is located at first base
On plate 141 or the second substrate 142；The cover sheet is the ducting layer 120；The cover sheet is backwards to the spontaneous photoelectricity
The surface on road 140 is the sensing face 130.Therefore, the cover sheet can not only play the protection self-luminous display surface
The effect of the hardware devices such as plate 140 and the optical sensor 150, additionally it is possible to play conduction initial light, form incident light and mention
For the effect of sensing face.
As shown in figure 3, in the present embodiment, the ducting layer 120 being projected as in the sensing face 130 is rectangular, has
Orthogonal first (does not indicate) in (not indicating in figure) and second in figure；First side and the first direction X are flat
Row；The second direction is parallel with the second direction Y.So the multiple first optical waveguide signal source 111 is along described first
Side is arranged in parallel；The multiple second optical waveguide signal source 112 is arranged in parallel along second side.
With continued reference to Fig. 2, carry finger print information reflected light 123 formed in the sensing face 130 after, successively thoroughly
The ducting layer 120 and the light-emitting display panel 140 are penetrated, is acquired by the optical sensor 150 to obtain fingerprint image.
It should be noted that the light-emitting display panel 140 includes multiple display pixels in the present embodiment；The light
Learning sensor 150 includes multiple photosensitive pixels.
With reference to Fig. 4, the amplification of display pixel described in display module embodiment shown in Fig. 2 and the photosensitive pixel is shown
Structural schematic diagram.
As shown in figure 4, the display pixel 143p includes that transparent area (not indicating in figure) and alternatively non-transparent district (are not marked in figure
Show)；The reflected light 143 transmits the light-emitting display panel through the transparent area, to keep the reflected light 123 suitable
Benefit transmits the light-emitting display panel 140.
Specifically, being formed with the film layer of metal material, the display pixel in the alternatively non-transparent district of the display pixel 143p
The transparent area of 143p can be realized the transmission of light.
It should be noted that in the display pixel, the transparent area area accounting is no less than in the present embodiment
0.5%.The transparent area area accounting is unsuitable too small.If the transparent area area accounting is too small, can make by described
The reflected light light intensity of light area transmission is too small, may will affect the quality of obtained fingerprint image, in some instances it may even be possible to can not obtain
Obtain clearly fingerprint image.
In the present embodiment, the light-emitting display panel 140 (as shown in Figure 2) further includes multiple spacer column (Photo
Spacer, PS) 143ps, between the first substrate 141 and the second substrate 142；Described in the warp of reflected light 123
Spacer column 143ps conduction transmits the light-emitting display panel 140.Specifically, the spacer column 143ps is located at the display picture
Plain transparent area corresponding position, so that the spacer column 142ps can smoothly realize the conduction to the reflected light 123.
The spacer column 143ps is protected for forming gap between the first substrate 141 and the second substrate 142
Demonstrate,prove the uniformity of spacing distance between the first substrate 141 and the second substrate 142.
In addition, the spacer column 143ps is between the first substrate 141 and the second substrate 142, and with it is described
The surface of first substrate 141 and the second substrate 142 is in contact, i.e., the described spacer column 143ps has opposite along extending direction
Two end faces being arranged；The end face surface opposite with the first substrate 141 and the second substrate 142 is in contact.Institute
It states after reflected light 123 formed in the sensing face 130, the ducting layer 120 and the first substrate 141 is transmitted, through court
It projects to the end face of the first substrate 141 into the spacer column 143ps；It is propagated in the spacer column 143ps towards institute
The end face for stating the second substrate 142 is projected to the second substrate 142 and the optical sensor 150 through the end face.
So the spacer column 143ps is applied not only to maintain the first substrate 141 and second base in the present embodiment
Interval between plate 142 improves the uniformity at the interval；It is also used to transmit the reflected light 123, to improve the reflection
The transmissivity of light 123, and then can achieve the purpose that improve obtained fingerprint image quality.
It should be noted that in the present embodiment, in the sensing face 130, the projected area of the photosensitive pixel 151p
More than or equal to the projected area of the display pixel 143p, to and make by transmiting the light-emitting display panel 140
Reflected light 123 can obtain fingerprint image,
Specifically, the photosensitive pixel 151p projected area and the display pixel 143p are thrown in the sensing face 130
The ratio of shadow area is in 1:1 to 9:1 range.
The ratio of the photosensitive pixel 151p projected area and the display pixel 143p projected area should not too it is big not yet
It is preferably too small, if the ratio of the photosensitive pixel 151p projected area and the display pixel 143p projected area is too big, institute
It is excessive to state photosensitive pixel 151p area, the display pixel 143p is too small, will affect the reflected light 123 and transmits the self-luminous
The light intensity of display panel 140, so as to will affect the quality of obtained fingerprint image；The photosensitive pixel 151p projected area
If too small with the ratio of the display pixel 143p projected area, the photosensitive pixel 151p area is too small, the display
Pixel 143p is excessive, will affect the quality of obtained fingerprint image.
With reference to Fig. 5, show that the invention shows the overlooking structure diagrams of another embodiment of mould group.
The present embodiment and previous embodiment something in common, details are not described herein by the present invention.The present embodiment and previous embodiment
The difference is that the light source 210 includes two optical waveguide signal sources, described two optical waveguide signal sources in the present embodiment
It is located at two adjacent corner positions of the ducting layer 220.
Specifically, the ducting layer 220 being projected as in the sensing face 2230 is rectangular；The light source 210 includes the
One optical waveguide signal source 211 and the second optical waveguide signal source 212.The first optical waveguide signal source 211 and second light wave
Signal source 212 is led to be located at two corner positions of the 220 long side two sides of rectangular wave conducting shell.
Although present disclosure is as above, present invention is not limited to this.Anyone 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 (18)
1. a kind of display module characterized by comprising
Light source, for generating initial light；
Ducting layer is located at the light source side, is used for transmission the initial light, and initial light described in scattered portion forms incidence
Light；
Sensing face, the incident light form the reflected light for carrying finger print information in the sensing face；
Light-emitting display panel, the side positioned at the ducting layer far from the sensing face are spontaneous described in the reflection light transmission
Light display panel；
Optical sensor, the reflected light for light-emitting display panel described in acquisition of transmission is to obtain fingerprint image.
2. display module as described in claim 1, which is characterized in that the light-emitting display panel includes multiple display pictures
Element；
The optical sensor includes multiple photosensitive pixels；
In the sensing face, the projected area of the photosensitive pixel is greater than or equal to the projected area of the display pixel.
3. display module as claimed in claim 2, which is characterized in that in the sensing face, the photosensitive pixel perspective plane
Long-pending and the display pixel projected area ratio is in 1:1 to 9:1 range.
4. display module as claimed in claim 2, which is characterized in that the display pixel includes transparent area and alternatively non-transparent district；
The reflected light transmits the light-emitting display panel through the transparent area.
5. display module as claimed in claim 4, which is characterized in that in the display pixel, the transparent area area is accounted for
Than being no less than 0.5%.
6. display module as described in claim 1, which is characterized in that the light-emitting display panel includes be oppositely arranged
One substrate, the second substrate and the self-luminous display circuit between the first substrate and the second substrate；
The ducting layer is located at the side of the first substrate or the second substrate far from the self-luminescence circuit；
The refractive index of the waveguide layer material is greater than the refractive index of the first substrate or the second substrate material.
7. display module as claimed in claim 6, which is characterized in that the refractive index of the waveguide layer material is in 1.4 to 1.7 models
In enclosing.
8. display module as claimed in claim 6, which is characterized in that the ducting layer is fitted in by vacuum abutted mode
On the first substrate or the second substrate；
Alternatively, the ducting layer is by UV sticker together on the first substrate or the second substrate.
9. display module as claimed in claim 6, which is characterized in that the light-emitting display panel further include:
Cover sheet is located in the first substrate or the second substrate；
The cover sheet is the ducting layer；
The cover sheet is the sensing face backwards to the surface of the self-luminescence circuit.
10. display module as claimed in claim 6, which is characterized in that the light-emitting display panel further include:
Multiple spacer columns, between the first substrate and the second substrate；
The reflected light transmits the light-emitting display panel through spacer column conduction.
11. display module as claimed in claim 10, which is characterized in that the light-emitting display panel includes:
Multiple display pixels, the display pixel include transparent area and alternatively non-transparent district；
The spacer column is located at display pixel transparent area corresponding position.
12. display module as claimed in claim 6, which is characterized in that the first substrate and the second substrate are flexibility
Substrate.
13. display module as claimed in claim 12, which is characterized in that the material of the first substrate and the second substrate
For polyimide plastic or poly terephthalic acid class plastics.
14. the display module as described in claim 1 to 13 any one claim, which is characterized in that the self-luminous is aobvious
Show that panel is OLED display panel.
15. display module as described in claim 1, which is characterized in that the light source is black light light source.
16. display module as claimed in claim 15, which is characterized in that the light source generates the wavelength of initial light in 700nm
Into 1000nm.
17. display module as described in claim 1, which is characterized in that the ducting layer is projected as in the sensing face
It is rectangular；
The light source includes two optical waveguide signal sources, and it is adjacent that described two optical waveguide signal sources are located at the ducting layer
At two corner positions.
18. display module as described in claim 1, which is characterized in that the ducting layer is projected as in the sensing face
It is rectangular, have orthogonal first while and when second；
The light source includes multiple first optical waveguide signal sources and multiple second optical waveguide signal sources；
The multiple first optical waveguide signal source is arranged in parallel along first side；
The multiple second optical waveguide signal source is arranged in parallel along second side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710776536.6A CN109426790A (en) | 2017-08-31 | 2017-08-31 | Display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710776536.6A CN109426790A (en) | 2017-08-31 | 2017-08-31 | Display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109426790A true CN109426790A (en) | 2019-03-05 |
Family
ID=65504866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710776536.6A Pending CN109426790A (en) | 2017-08-31 | 2017-08-31 | Display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109426790A (en) |
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| CN110751010A (en) * | 2019-03-07 | 2020-02-04 | 合肥京东方光电科技有限公司 | Display module, preparation method, control method and control device thereof, and display device |
| WO2021073013A1 (en) * | 2019-10-17 | 2021-04-22 | Shenzhen GOODIX Technology Co., Ltd. | Anti-spoofing of two-dimensional fake objects with bright-dark reversal imaging in optical sensing modules |
| CN113449575A (en) * | 2020-08-06 | 2021-09-28 | 重庆康佳光电技术研究院有限公司 | Display back plate, display panel, manufacturing method of display back plate and terminal |
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Application publication date: 20190305 |