CN110263773A - The production method of display module, display device and grating membrane material layer - Google Patents
The production method of display module, display device and grating membrane material layer Download PDFInfo
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- CN110263773A CN110263773A CN201910700692.3A CN201910700692A CN110263773A CN 110263773 A CN110263773 A CN 110263773A CN 201910700692 A CN201910700692 A CN 201910700692A CN 110263773 A CN110263773 A CN 110263773A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
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Abstract
The present invention provides the production method of a kind of display module, display device and grating membrane material layer, which includes the display panel and backlight module being oppositely arranged, and display panel includes photo cell, and backlight module includes light guide plate and light source；Light guide plate includes incidence surface and light-emitting surface, and light-emitting surface is arranged towards display panel；Light source is located at incidence surface side, and the light direction of light source is towards incidence surface；Backlight module further includes grating membrane material layer, and grating membrane material layer is located at light guide plate close to the side of display panel；Grating membrane material layer includes transparent grating layer, and transparent grating layer includes spaced multiple transparent grating columns；Grating membrane material layer further includes light shield layer, and light shield layer is located at side of the transparent grating layer far from light guide plate, and light shield layer includes multiple light-shielding structures, and multiple light-shielding structures and multiple transparent grating columns are arranged in a one-to-one correspondence.The present invention reduces half intensity decaying visual angle, improves the discrimination of fingerprint by increasing grating membrane material layer in backlight unit.
Description
[technical field]
The present invention relates to technical field more particularly to a kind of display module, the display device comprising the display module and
A kind of production method of grating membrane material layer.
[background technique]
With universal, concern of the information security by people of mobile display product.Fingerprint is human body inherent only one
No two and the invariant features that can be distinguished with other people, it by the series of ridges and Gu Zucheng on finger tip skin surface, these ridges and
The composition details of paddy generally include the bifurcated of ridge, the end of ridge, arch, the arch of tent-type, left-handed, dextrorotation, spiral or bispin
Etc. details, these Details uniqueness of fingerprint pattern.Since fingerprint has uniqueness, is difficult to replicability, safety etc.
Advantage, fingerprint identification technology is widely used in mobile display product in recent years, as a kind of authentication and access control
Mode so that the safety of mobile display product and ease for operation are greatly improved.
Optical finger print identification is the refraction and principle of reflection using light, is placed a finger on light eyeglass, just by light
In the reflection differences of finger surface line paddy and wrinkle ridge, realizes that light sensitive device receives different finger print information differentiation, form fingerprint image
Picture, working principle is fairly simple, is suitble to comprehensive screenization design of mobile display product.
However, brightness decay is serious after the light that light source issues passes through multiple film layers since fingerprint lines is complex,
And fingerprint recognition rate requires high, the influence for needing to prevent the reflected light at other visual angles from generating to fingerprint recognition.
[summary of the invention]
In order to solve the above technical problem, the present invention provides a kind of display module, including the display device of the display module
And a kind of production method of grating membrane material layer.
In a first aspect, the embodiment of the present invention provides a kind of display module, the display panel including being oppositely arranged and backlight mould
Group, the display panel include photo cell, and the backlight module includes light guide plate and light source；The light guide plate includes incidence surface
And light-emitting surface, the light-emitting surface are arranged towards the display panel；The light source is located at the incidence surface side, and the light source
Light direction towards the incidence surface；The backlight module further includes grating membrane material layer, and the grating membrane material layer is located at described
Light guide plate is close to the side of the display panel；The grating membrane material layer includes transparent grating layer, and the transparent grating layer includes
Spaced multiple transparent grating columns；The grating membrane material layer further includes light shield layer, and the light shield layer is located at the transparent light
Side of the grid layer far from the light guide plate, the light shield layer include multiple light-shielding structures, the multiple light-shielding structure and described more
A transparent grating column is arranged in a one-to-one correspondence.
Second aspect, the embodiment of the present invention provide a kind of fingerprint recognition display device, including above-mentioned first aspect is provided
Display module.
The third aspect, the embodiment of the present invention provide a kind of production method of grating membrane material layer, comprising: provide the first substrate；
It is coated with one layer of light shield layer in the side of first substrate, the light shield layer is patterned, forms multiple spaced shading knots
Structure；It is coated with transparent grating material layer far from the side of first substrate in the light-shielding structure, patterns the transparent grating
Material layer is formed and the multiple light-shielding structure multiple transparent grating columns correspondingly；The second substrate is provided, described second
Second substrate is fitted in side of the transparent grating column far from first substrate by the side glue coating of substrate,
Form grating membrane material layer.
Compared with prior art, display module and fingerprint recognition display device provided in an embodiment of the present invention, by carrying on the back
Grating membrane material layer is set in optical mode group, the half intensity decaying visual angle after the light of light source sending can be reduced through the light guide plate, from
And can be improved the light intensity of small angle light, and can also prevent other influences of visual angle reflected light to fingerprint recognition, thus greatly
The big detection accuracy for promoting fingerprint recognition；The production method of grating membrane material layer provided in an embodiment of the present invention, makes the light of formation
Grid membrane material layer can be used in backlight module, to improve the light intensity of small angle light, and prevent other visual angle reflected lights to fingerprint
The influence of identification, to promote the detection accuracy of fingerprint recognition.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram for display module that the relevant technologies provide；
Fig. 2 is a kind of schematic cross-sectional view of display module provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram that light is projected through grating membrane material layer；
Fig. 4 is the schematic diagram that light is projected from backlight module；
Fig. 5 is the schematic cross-sectional view of another display module provided in an embodiment of the present invention；
Fig. 6 is the schematic cross-sectional view of another display module provided in an embodiment of the present invention；
Fig. 7 is the schematic cross-sectional view of another display module provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of the part film layer of display module provided in an embodiment of the present invention；
Fig. 9 is schematic diagram of the light from the injection in the grating membrane material layer 210 of Fig. 6；
Figure 10 is the schematic cross-sectional view of another display module provided in an embodiment of the present invention；
Figure 11 is a kind of schematic diagram of the fingerprint recognition driving circuit of display panel provided in an embodiment of the present invention；
Figure 12 is the partial enlarged view of fingerprint recognition driving circuit shown in Figure 11；
Figure 13 is a kind of structural schematic diagram of fingerprint recognition display device provided in an embodiment of the present invention；
Figure 14 is a kind of production method flow chart of grating membrane material layer provided in an embodiment of the present invention；
Figure 15 is cuing open for the structure in the production method of grating membrane material layer shown in Figure 14 through being formed after step S1 and S2
Face schematic diagram；
Figure 16 is that the section of the structure in the production method of grating membrane material layer shown in Figure 14 through being formed after step S3 shows
It is intended to；
Figure 17 is cuing open for the structure in the production method of grating membrane material layer shown in Figure 14 through being formed after step S4 and S5
Face schematic diagram；
Figure 18 is the production method flow chart of another grating membrane material layer provided in an embodiment of the present invention；
Figure 19 is the diagrammatic cross-section for the grating membrane material layer that the production method of grating membrane material layer shown in Figure 18 is formed.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though device may be described in embodiments of the present invention using term first, second etc., but these
Device should not necessarily be limited by these terms.These terms are only used to for device being distinguished from each other out.For example, not departing from the embodiment of the present invention
In the case where range, first device can also be referred to as second device, and similarly, second device can also be referred to as the first dress
It sets.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram for display module that the relevant technologies provide.As shown in Figure 1, this is aobvious
Show that mould group includes the display panel and backlight assembly 400 ' being oppositely arranged, further includes the glass that display panel light-emitting surface side is set
Glass cover board 500 ', display panel include the color membrane substrates 200 ' that are oppositely arranged and array substrate 100 ' and are located at color membrane substrates
Liquid crystal layer 300 ' between 200 ' and array substrate 100 ', it is liquid crystal molecule that liquid crystal layer 300 ' is interior, is set in array substrate 100 '
It is equipped with fingerprint identification unit 110 '.When fingerprint identification unit 110 ' works, when finger F i contacts display module, light source irradiation is in one's hands
Refer to fingerprint valley line Fi1 and crestal line Fi2 on when reflect, due to valley line Fi1 and crestal line Fi2 reflection angle and reflect back
Intensity of illumination it is different, by light projection to fingerprint identification unit 110 ', fingerprint identification unit 110 ' believes the induction received
Number fingerprint recognition signal receiving unit (not shown) is transmitted to by fingerprint signal line so that fingerprint recognition signal receive it is single
Member goes out the valley line Fi1 and crestal line Fi2 of fingerprint according to the signal identification received.When finger touches glass cover-plate 500 ', hand
A series of fingerprint ridges and fingerprint valley on finger tip skin surface form fingerprint, and the light that light source issues is by liquid crystal layer 300 ', coloured silk
Finger F i is reached after the film layers such as ilm substrate 200 ' and glass cover-plate 500 ', by reflecting again successively by glass cover-plate 500 ', coloured silk
The film layers such as ilm substrate 200 ', liquid crystal layer 300 ' reach the fingerprint identification unit 110 ' in array substrate 100 '.
The lines of fingerprint is typically more complicated, and brightness decay is serious after the light that light source issues passes through multiple film layers, and
Fingerprint recognition rate requires high, the influence for needing to prevent the reflected light at other visual angles from generating to fingerprint recognition.
In view of this, the embodiment of the present invention provides a kind of display module, the display panel including being oppositely arranged and backlight mould
Group, display panel include photo cell, and backlight module includes light guide plate and light source；Light guide plate includes incidence surface and light-emitting surface, out
Smooth surface is arranged towards display panel；Light source is located at incidence surface side, and the light direction of light source is towards incidence surface；Backlight module is also
Including grating membrane material layer, grating membrane material layer is located at light guide plate close to the side of the display panel；Grating membrane material layer includes transparent
Grating layer, transparent grating layer include spaced multiple transparent grating columns；Grating membrane material layer further includes light shield layer, light shield layer position
In side of the transparent grating layer far from light guide plate, light shield layer includes multiple light-shielding structures, multiple light-shielding structures and multiple transparent light
Stake is arranged in a one-to-one correspondence.
Specifically, Fig. 2 and Fig. 3 be please refer to, Fig. 2 is a kind of section view signal of display module provided in an embodiment of the present invention
Figure, Fig. 3 is the schematic diagram that light is projected through grating membrane material layer, and for ease of understanding, Fig. 2 and Fig. 3 merely illustrate the portion of display panel
Separation structure.The display module includes the display panel 10 and backlight module 20 being oppositely arranged, and display panel 10 includes photo cell
110, backlight module 20 includes light guide plate 201 and light source 202；Light guide plate 201 includes incidence surface 201a and light-emitting surface 201b, out light
Face 201b is arranged towards display panel 10；Light source 202 is located at the side incidence surface 201a, and the light direction direction of light source 202 enters
Smooth surface 201a；Backlight module 20 further includes grating membrane material layer 210, and grating membrane material layer 210 is located at light guide plate 201 close to display panel
10 side；Grating membrane material layer 210 includes transparent grating layer 211, and transparent grating layer 211 includes spaced multiple transparent light
Stake 2110；Grating membrane material layer 210 further includes light shield layer 212, and light shield layer 212 is located at transparent grating layer 211 far from light guide plate 201
Side, light shield layer 212 include multiple light-shielding structures 2120, multiple light-shielding structures 2120 and multiple transparent grating columns 2110 are one by one
It is correspondingly arranged.
Referring to figs. 2 and 3, arrow A represents light in Fig. 3, compared with prior art, display provided in an embodiment of the present invention
Mould group, by the way that grating membrane material layer 210 is arranged, the transparent grating column 2110 in grating membrane material layer 210 is for maintaining light path, shading knot
For blocking a part of light, the light not being blocked projects structure 2120 from the gap between light-shielding structure 2120, can reduce
The light that light source 202 issues through the light guide plate decay visual angle by the half intensity after 201, so as to improve the light of small angle light
By force, and other influences of visual angle reflected light to fingerprint recognition can be prevented, to greatly promote the detection accuracy of fingerprint recognition.
It should be noted that as shown in figure 4, illustrating only back in Fig. 4 for the schematic diagram that light is projected from backlight module
Optical mode group 20 is whole, does not illustrate the specific structure in backlight module 20, when light A is vertically projected (i.e. from backlight module 20
Angle of emergence α=90 °) when, brightness is maximum, it is assumed that and it is L, and when light tilts injection from backlight module 20, brightness will
Decaying, half intensity decaying visual angle refers to angle of the light relative to vertical direction when emergent ray brightness is 0.5L, in Fig. 4,
Light A ' tilts injection from backlight module 20, and outgoing brightness is 0.5L, and half intensity decaying visual angle is light A ' and light A
Angle theta.
In the embodiment of the present invention, display panel 10 is liquid crystal display panel, and display panel 10 includes the array being oppositely arranged
Substrate 100 and counter substrate 200 and the liquid crystal layer 300 between array substrate 100 and counter substrate 200, array substrate
100 generally include multi-strip scanning line and multiple data lines (not shown), and scan line and data line insulate arranged in a crossed manner and limit
Fixed multiple sub-pixel area (not shown)s, each sub-pixel area include thin film transistor (TFT) and pixel electrode (not shown),
Array substrate 100 can also include public electrode (not shown), be formed when display, between pixel electrode and public electrode flat
Row electric field driven liquid crystal is rotated to realize display function.The size of array substrate 100 can be big compared with color membrane substrates 200, so that
Array substrate 100 forms stepped region (not shown), provides the integrated of various driving signals for binding array substrate 100
The devices such as circuit chip.In Fig. 6, array substrate 100 merely illustrates underlay substrate 101 and photo cell 110, in actual product,
The elements such as scan line, data line, thin film transistor (TFT), pixel electrode and public electrode can be set close in underlay substrate 101
The side of color membrane substrates 200, no longer specifically repeats herein.
It should also be noted that, backlight module 20 is also used to provide backlight for display panel 10 in the embodiment of the present invention,
To realize display.Backlight can be provided separately with the light source 202 in the embodiment of the present invention, can also in the embodiment of the present invention
Light source 202 integrate, light source 202 both for for fingerprint recognition providing fingerprint recognition light, was also used for showing for display panel
Offer backlight is provided.Certainly, fingerprint recognition light and backlight light not necessarily of the same race, such as fingerprint recognition light can be infrared light,
And backlight can be white light, influence each other to prevent the two.
With continued reference to FIG. 2, optionally, in the present embodiment, table of the transparent grating column 2110 close to 10 side of display panel
Orthographic projection covering transparent grating column 2110 surface far from display panel 10 side of the face on display panel 10 is in display panel
Orthographic projection on 10, in this way setting can make two neighboring spacing distance of the transparent grating column 2110 far from 10 side of display panel
More than or equal to the spacing distance close to 10 side of display panel, so as to there is more light directly from two neighboring transparent grating column
Interval between 2110 is projected, therefore can increase the light intensity of emergent ray, promotes the detection accuracy of fingerprint recognition.
Further, the shape of transparent grating column 2110 can be terrace with edge or cuboid, so that two neighboring transparent
Grating column 2110 is more than or equal to the spacing distance close to 10 side of display panel, example far from the spacing distance of 10 side of display panel
In Fig. 2, the shape of transparent grating column 2110 is terrace with edge, in other optional embodiments of the invention, as shown in figure 5, being
The schematic cross-sectional view of another kind display module provided in an embodiment of the present invention, the shape of transparent grating column 2110 may be rectangular
Body.
It is the schematic cross-sectional view of another display module provided in an embodiment of the present invention referring next to Fig. 6, Fig. 6, this
In embodiment, with Fig. 2 shows the something in common of display panel repeat no more, the difference is that, grating membrane material layer 210 is also
Including the first substrate 210a and the second substrate 210b, transparent grating layer 211 and light shield layer 212 are located at the first substrate 210a and second
Between substrate 210b, the second substrate 210b is located at transparent grating layer 211 close to the side of light guide plate 201.By transparent grating layer 211
And light shield layer 212 is arranged between the first substrate 210a and the second substrate 210b, the first substrate 210a and the second substrate 210b are used
The light-shielding structure 2120 in transparent grating column 2110 and light shield layer 212 in fixed transparent grating layer 211.
It is the schematic cross-sectional view of another display module provided in an embodiment of the present invention referring next to Fig. 7, Fig. 7, this
In embodiment, repeated no more with the something in common of the display panel shown in Fig. 6, the difference is that, grating membrane material layer 210 is also
Including reflecting layer 213, reflecting layer 213 is between light shield layer 212 and transparent grating layer 211, and reflecting layer 213 is at least adjacent to transparent
The side of grating layer 211 is reflecting surface；Reflecting layer 213 includes multiple catoptric arrangements 2130, multiple catoptric arrangements 2130 and multiple
Transparent grating column 2110 is arranged in a one-to-one correspondence.Catoptric arrangement 2130 is irradiated to for reflecting from the light-emitting surface 201b of light guide plate 201
Light on catoptric arrangement 2130 enhances the light intensity of emergent ray to promote the utilization rate to light.
Technologic cost of manufacture please is reduced in order to reduce the quantity of film layer referring again to Fig. 6, it can be by shading knot
Structure 2120 is multiplexed with catoptric arrangement, and light-shielding structure 2120 is reflecting surface at least adjacent to the side of transparent grating layer 211, then shading knot
Structure 2120 can both play the role of shading, can also reflect from the light-emitting surface 201b of light guide plate 201 and be irradiated to light-shielding structure
Light on 2120 enhances the light intensity of emergent ray to promote the utilization rate to light.
Optionally, in the respective embodiments described above, transparent grating column 2110 is being shown close to the surface of 10 side of display panel
Orthographic projection on panel 10 is overlapped with orthographic projection of the catoptric arrangement on display panel 10, i.e., transparent grating column 2110 is close to display
The surface of 10 side of panel is consistent with the shapes and sizes of catoptric arrangement, to fully and rationally use the space on display panel 10.
Optionally, in the respective embodiments described above, multiple transparent grating columns 2110 are arranged in array.It is this in conjunction with Fig. 8, Fig. 8
A kind of structural schematic diagram of the part film layer for display module that inventive embodiments provide exemplarily only shows first in Fig. 8
Substrate 210a and transparent grating column 2110, multiple transparent grating columns 2110 are in the array arrangement of m × n, and m and n are whole greater than 1
Number.In Fig. 8, array line direction is the direction x, and array column direction is the direction y, is illustrated by taking 4 × 3 array as an example.It needs
Bright, when multiple transparent grating columns 2110 are in the array arrangement of m × n, and the shape of transparent grating column 2110 can be rib
When platform or cuboid, the mutually close edge of two neighboring transparent grating column 2110 is parallel to each other, so that adjacent two are transparent
The distance between grating column 2110 is a definite value, and the distance between two transparent grating columns 2110 of arbitrary neighborhood are homogeneous
Deng so as to play the role of grating, so that the change at the half intensity decaying visual angle of the light after grating membrane material layer 210
Change is consistent, and output intensity keeps uniform.
Optionally, in the various embodiments described above, half intensity decaying visual angle can be adjusted to be less than or equal to by grating membrane material layer 210
25°.Specifically, please by taking Fig. 9 as an example, Fig. 9 is schematic diagram of the light from the injection in the grating membrane material layer 210 of Fig. 6, light A from
It is vertically projected in grating membrane material layer 210, a=90 ° of the angle of emergence, the brightness of light A is L, light of the brightness more than or equal to 0.5L
Optical range is the equal of the range between two light A ' out, and the angle of emergence b of light A ' is half intensity decaying visual angle, b≤25 °.
It, specifically can be by adjusting the first substrate 210a and the second substrate according to formula h × tan (b)=d/2 in the embodiment of the present invention
The distance between the distance between 210b h and two neighboring light-shielding structure 2120 d come adjust half intensity decaying visual angle b.Into one
Step ground, visual angle that half intensity can be decayed are adjusted to be less than or equal to 25 ° and are more than or equal to 20 °, i.e. 20 °≤b≤25 °.This be by
If too small in half intensity decaying visual angle, very little is arranged to obtain in the distance between two neighboring light-shielding structure 2120 d needs, this is in work
It is difficult to realize in skill, therefore half intensity decaying visual angle is selected to be less than or equal to 25 ° and be more than or equal to 20 °.
On the basis of the respective embodiments described above, referring to FIG. 10, Figure 10 is provided in an embodiment of the present invention another aobvious
Show the schematic cross-sectional view of mould group, in present embodiment, is repeated no more with the something in common of the display panel shown in Fig. 7, difference
It is in backlight module 20 can also include diffusion sheet 205 and bright enhancement film 206, and grating membrane material layer 210 is located at 205 He of diffusion sheet
Side of the bright enhancement film 206 far from light guide plate 201.Diffusion sheet 205 is used to convert uniform area source, bright enhancement film 206 for light
Dispersed light is assembled to positive direction, to improve the brightness of emergent ray.Grating membrane material layer 210 is located at diffusion sheet 205 and is increased
Side of the light film 206 far from light guide plate 201, light after diffusion and aggregation using grating membrane material layer 210, can be more effectively
The half intensity decaying visual angle for reducing the light being emitted from backlight module, improves the light intensity of small angle light.In addition, the present invention is implemented
Example in, in grating membrane material layer 210 material used in transparent grating layer 211 can be with the identical transparent material of bright enhancement film 206,
For example acrylic resin, certain embodiment of the present invention are not limited thereto, and can also use other similar material.
Certainly, in the respective embodiments described above, backlight module 20 can also include being located at light guide plate 201 far from display panel 10
The reflector plate 204 of side, details are not described herein again.
Figure 11 and Figure 12 are please referred to, Figure 11 is a kind of fingerprint recognition driving electricity of display module provided in an embodiment of the present invention
The schematic diagram on road, Figure 12 are the partial enlarged views of fingerprint recognition driving circuit shown in Figure 11.Fingerprint recognition driving circuit includes
Multiple fingerprint identification units 12, each fingerprint identification unit 12 include at least one first film transistor 11 and at least one light
Feel unit 110.In each fingerprint identification unit 12, at least one first film transistor 11 is connected with photo cell 110, figure
It is that a first film transistor 11 drives a photo cell 110 in 11 and Figure 12, naturally it is also possible to a first film crystalline substance
Body pipe drives multiple photo cells or multiple first film transistors to drive a photo cell, herein to the first film crystalline substance
The quantity of the first film transistor of the quantity and driving photo cell of body pipe driving photo cell is not especially limited.Light sensation list
Member 110 can be photodiode.In present embodiment, the array substrate of display panel further includes a plurality of prolonging along first direction X
The first scan line 50 of setting is stretched, for providing scanning drive signal to photo cell 110), optionally, in present embodiment
First scan line 50 can be multiplexed with the scan line in array substrate, and fingerprint recognition driving circuit further includes the first data line 60,
First scan line 50 and 60 transposition insulator of the first data line limit multiple 12 regions of fingerprint identification unit, with a line fingerprint
At least two photo cells 110 in recognition unit 12 are electrically connected with the first scan line of same 50.
With reference to Figure 12, the first data line 60 is connected with source electrode 112 or drain electrode 113；First scan line 50 and 111 phase of grid
Connection.One end of photodiode is connected with source electrode 112 or drain electrode 113, and the other end is connected to common voltage Vbias.The
One thin film transistor (TFT) 11 includes grid 111, source electrode 112, drain electrode 113, and grid 111 is electrically connected with the first scan line 50, source electrode 112
It is electrically connected with the cathode 1101 of photodiode, drain electrode 113 is electrically connected with the first data line 60, the anode 1102 of photodiode
Common voltage Vbias is connected, the cathode 1101 of photodiode is connected to signal voltage Vref.
The working principle of fingerprint identification unit 12 is: 111 electricity of grid of the first scan line 50 and first film transistor 11
Connection can open first film transistor 11 by providing electric signal to the first scan line 50, make photodiode along first
Direction X is opened line by line or disposable opening, and when photodiode has illumination, the cathode 1101 of photodiode is corresponding
Signal voltage Vref can change, i.e., when finger contact screen, light source is irradiated on the valley line and crestal line of finger print
Shi Fasheng reflection, since the reflection angle of valley line and crestal line and the intensity of illumination that reflects back are different, by light projection to photoelectricity two
In pole pipe, the resistance value of photodiode is caused to change, generate leakage current signal, photodiode passes through in the conductive state
First film transistor 11 leakage current signal is spread out of to the first data line 60, the fingerprint recognition being connected with the first data line 60
Signal receiving unit 40 identifies the valley line and crestal line of fingerprint.It should be noted that photodiode is not sent out when gauge without light source irradiates
Send any electric signal to the first data line 60.
It should also be noted that, display module generally includes viewing area and the non-display area around viewing area, for realizing
The region of fingerprint recognition is fingerprint identification area, and the fingerprint identification unit in above embodiment is located at fingerprint identification area.Fingerprint
Cog region can partly overlap with viewing area, and the fingerprint recognition of the part of full screen display mould group can be realized by fingerprint identification area
Function.Fingerprint identification area can also be completely overlapped with viewing area, i.e., fingerprint identification unit is covered with viewing area, and finger is touched in screen
Upper any position can trigger fingerprint identification unit and carry out fingerprint recognition, realizes full frame fingerprint identification function, makes fingerprint recognition
The higher more convenient and quicker of precision.
Conceived based on foregoing invention, the embodiment of the present invention also provides a kind of fingerprint recognition display device, and Figure 13 is the present invention
A kind of structural schematic diagram for fingerprint recognition display device that embodiment provides, with reference to Figure 13, which includes
The display module 500 that any embodiment of that present invention provides.In present embodiment, which is mobile phone, at this
It invents in other optional embodiments, which can also be that tablet computer, notebook etc. arbitrarily have
The equipment of display and fingerprint identification function.
In addition, the embodiment of the invention also provides a kind of production method of grating membrane material layer, for making above-mentioned each implementation
Grating membrane material layer in the display panel that mode provides, please refers to Figure 14, and Figure 14 is a kind of grating provided in an embodiment of the present invention
The production method flow chart of membrane material layer, comprising:
Step S1: the first substrate is provided；
Step S2: it is coated with one layer of light shield layer in the side of the first substrate, light shield layer is patterned, is formed multiple spaced
Light-shielding structure；
Step S3: transparent grating material layer, patterned transparent grating are coated with far from the side of the first substrate in light-shielding structure
Material layer is formed and multiple light-shielding structures multiple transparent grating columns correspondingly；
Step S4: the second substrate is provided, in the side glue coating of the second substrate；
Step S5: the second substrate is fitted in side of the transparent grating column far from the first substrate, forms grating membrane material layer.
Specifically, Figure 15-Figure 17 is please referred to, Figure 15-Figure 17 is each in the production method of grating membrane material layer shown in Figure 14
The diagrammatic cross-section for the structure that step is formed.Figure 15 is in the production method of grating membrane material layer shown in Figure 14 through step S1 and S2
The diagrammatic cross-section of the structure formed later in step S1, provides the first substrate 210a；In step S2, in the first substrate 210a
Side be coated with one layer of light shield layer 212, pattern light shield layer 212, form multiple spaced light-shielding structures 2120.
Figure 16 is that the section of the structure in the production method of grating membrane material layer shown in Figure 14 through being formed after step S3 shows
It is intended to, in step S3, is coated with transparent grating material layer 211, pattern far from the side of the first substrate 210a in light-shielding structure 2120
Change transparent grating material layer 211, is formed and the one-to-one multiple transparent grating columns 2110 of multiple light-shielding structures 2120.
Figure 17 is cuing open for the structure in the production method of grating membrane material layer shown in Figure 14 through being formed after step S4 and S5
Face schematic diagram in step S4, provides the second substrate 210b, in the side glue coating of the second substrate 210b；By the second substrate
210b is fitted in side of the transparent grating column 2110 far from the first substrate 210a, forms grating membrane material layer.
The production method of grating membrane material layer provided in an embodiment of the present invention, make formation grating membrane material layer can be used on
In the backlight module for stating the display module of embodiment offer, to improve the light intensity of small angle light, and prevent other visual angles from reflecting
Influence of the light to fingerprint recognition, to promote the detection accuracy of fingerprint recognition.
In step S2, optionally, light-shielding structure 2120 is multiplexed with catoptric arrangement, i.e. light-shielding structure 2120 uses reflecting material
Preparation, the side that light-shielding structure 2120 is at least distally from the first substrate 210a is reflecting surface.
In step S3, optionally, transparent grating column 2110 close to the first side substrate 210a surface in the first substrate
Orthographic projection covering surface of the transparent grating column 2110 far from the first side substrate 210a on 210a is on the first substrate 210a
Orthographic projection.Optionally, the shape of transparent grating column 2110 is terrace with edge or cuboid.Further, transparent grating column 2110 can
To be arranged in array.
Figure 18 is please referred to, Figure 18 is the production method flow chart of another grating membrane material layer provided in an embodiment of the present invention,
In present embodiment, repeated no more with the something in common of the production method of the grating membrane material layer shown in Figure 14, the difference is that,
Further include upon step s 2 step S21 before step S3: being coated with one layer far from the side of the first substrate 210a in light-shielding structure
Reflecting layer 213, reflecting layer 213 be at least distally from the first substrate 210a side be reflecting surface, pattern reflecting layer 213, formed with
The one-to-one multiple catoptric arrangements 2130 of multiple light-shielding structures 2120.Using the production method of the grating membrane material layer shown in Figure 18
Obtained grating membrane material layer is as shown in figure 19, and Figure 19 is the grating membrane material that the production method of grating membrane material layer shown in Figure 18 is formed
The diagrammatic cross-section of layer, details are not described herein again.
In the production method of above two grating membrane material layer, optionally, transparent grating column 2110 is close to the first substrate 210a
The surface of side is overlapped in the orthographic projection on the first substrate 210a with orthographic projection of the catoptric arrangement on the first substrate 210a.
Further, the refractive index of glue is more than or equal to 1.52, to reduce reflection of the glue to light, increases the saturating of light
Rate is crossed, the light intensity of fingerprint recognition light is further promoted.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (18)
1. a kind of display module, including the display panel and backlight module being oppositely arranged, which is characterized in that the display panel packet
Photo cell is included, the backlight module includes light guide plate and light source；
The light guide plate includes incidence surface and light-emitting surface, and the light-emitting surface is arranged towards the display panel；
The light source is located at the incidence surface side, and the light direction of the light source is towards the incidence surface；
The backlight module further includes grating membrane material layer, and the grating membrane material layer is located at the light guide plate close to the display panel
Side；
The grating membrane material layer includes transparent grating layer, and the transparent grating layer includes spaced multiple transparent grating columns；
The grating membrane material layer further includes light shield layer, and the light shield layer is located at one of the transparent grating layer far from the light guide plate
Side, the light shield layer include multiple light-shielding structures, and the multiple light-shielding structure and the multiple transparent grating column one-to-one correspondence are set
It sets.
2. display module according to claim 1, which is characterized in that the transparent grating column is close to the display panel one
The orthographic projection of the surface of side on said display panel covers surface of the transparent grating column far from the display panel side
Orthographic projection on said display panel.
3. display module according to claim 2, which is characterized in that the shape of the transparent grating column is terrace with edge or length
Cube.
4. display module according to claim 1, which is characterized in that the multiple transparent grating column is arranged in array.
5. display module according to claim 1, which is characterized in that the grating membrane material layer further includes the first substrate and
Two substrates, between first substrate and second substrate, second substrate is located at described the transparent grating layer
Transparent grating layer is close to the side of the light guide plate.
6. display module according to claim 5, which is characterized in that the grating membrane material layer further includes reflecting layer, described
Reflecting layer between the light shield layer and the transparent grating layer, the reflecting layer at least adjacent to the transparent grating layer one
Side is reflecting surface；
The reflecting layer includes multiple catoptric arrangements, and the multiple catoptric arrangement and the multiple transparent grating column one-to-one correspondence are set
It sets.
7. display module according to claim 5, which is characterized in that the light shield layer is located at second substrate and described
Between transparent grating layer, the light-shielding structure is multiplexed with catoptric arrangement, and the light-shielding structure is at least adjacent to the transparent grating layer
Side be reflecting surface.
8. display module according to claim 6 or 7, which is characterized in that the transparent grating column is close to the display surface
The orthographic projection of the surface of plate side on said display panel and the orthographic projection weight of the catoptric arrangement on said display panel
It closes.
9. display module according to claim 1, which is characterized in that the backlight module further includes diffusion sheet and adds lustre to
Film, the grating membrane material layer are located at the side of the diffusion sheet and the bright enhancement film far from the light guide plate.
10. a kind of fingerprint recognition display device, which is characterized in that including such as described in any item display panels of claim 1-9.
11. a kind of production method of grating membrane material layer characterized by comprising
Step S1: the first substrate is provided；
Step S2: being coated with one layer of light shield layer in the side of first substrate, pattern the light shield layer, forms multiple intervals and sets
The light-shielding structure set；
Step S3: it is coated with transparent grating material layer far from the side of first substrate in the light-shielding structure, described in patterning
Transparent grating material layer is formed and the multiple light-shielding structure multiple transparent grating columns correspondingly；
Step S4: providing the second substrate, in the side glue coating of second substrate,
Step S5: second substrate is fitted in side of the transparent grating column far from first substrate, forms grating
Membrane material layer.
12. production method according to claim 11, which is characterized in that the transparent grating column is close to first substrate
Orthographic projection of the surface of side in first substrate covers the table of the transparent grating column far from first substrate side
Orthographic projection of the face in first substrate.
13. production method according to claim 12, which is characterized in that the shape of the transparent grating column be terrace with edge or
Cuboid.
14. production method according to claim 11, which is characterized in that the multiple transparent grating column is arranged in array.
15. production method according to claim 11, which is characterized in that upon step s 2 further include step before step S3
Rapid S21: it is coated with one layer of reflecting layer far from the side of first substrate in the light-shielding structure, the reflecting layer is at least distally from institute
The side for stating the first substrate is reflecting surface, patterns the reflecting layer, is formed more correspondingly with the multiple light-shielding structure
A catoptric arrangement.
16. production method according to claim 11, which is characterized in that the light-shielding structure is multiplexed with catoptric arrangement, institute
Stating light-shielding structure and being at least distally from the side of first substrate is reflecting surface.
17. production method according to claim 15 or 16, which is characterized in that the transparent grating column is close to described first
The surface of substrate side is in the orthographic projection and orthographic projection of the catoptric arrangement in first substrate in first substrate
It is overlapped.
18. production method according to claim 11, which is characterized in that the refractive index of the glue is more than or equal to 1.52.
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