CN110287920A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
- Publication number
- CN110287920A CN110287920A CN201910579418.5A CN201910579418A CN110287920A CN 110287920 A CN110287920 A CN 110287920A CN 201910579418 A CN201910579418 A CN 201910579418A CN 110287920 A CN110287920 A CN 110287920A
- Authority
- CN
- China
- Prior art keywords
- dielectric layer
- transparent dielectric
- display panel
- light
- array substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a kind of display panel and display devices, it include: array substrate and opposite substrate that be opposite and setting, optical detector between array substrate and opposite substrate, and positioned at opposite substrate away from the transparent dielectric layer with setting figure of array substrate side；The refractive index of transparent dielectric layer is greater than the refractive index for the component being in contact with transparent dielectric layer.When light is when being incident on the interface of component of transparent dielectric layer and contact, the incidence angle that finger is reflected into the high angle scattered light of transparent dielectric layer is greater than or equal to the critical angle of total reflection, to be totally reflected；The low-angle light of transparent dielectric layer is reflected by finger, it can be directly incident to display panel inside by the unlapped region of transparent medium layer pattern, in this way light received by optical detector be corresponding position fingerprint reflection low-angle light, the incidence for avoiding the high angle scattered light of the fingerprint reflection of other positions, is conducive to the detection sensitivity for improving optical detector.
Description
Technical field
The present invention relates to field of display technology, espespecially a kind of display panel and display device.
Background technique
Fingerprint recognition provides huge effect in terms of protecting individual privacy, at present as a kind of bio-identification mode
Market electronic product nearly all can have fingerprint recognition equipped with fingerprint recognition system, such as automobile, mobile phone, punched-card machine etc.
Function.With the release shielded comprehensively, fingerprint Identification sensor tends to design in on-screen display (osd) area, improves user experience.
Conventional capacitance type fingerprint identifying schemes can not the biggish cover-plate glass of penetration thickness, no longer adapt to the hair shielded comprehensively
Exhibition trend, and there are the optical finger print identifying schemes of good penetration to become a kind of new developing direction.Existing optical finger print
Identification sensor need to pass through multiple film layers by the reflected light of finger, eventually arrive at optical detector and carry out signal knowledge
Not.Since optical detector receives the incidence from each angle light, and the light of large angle incidence is frequently not corresponding position
The light that the fingerprint set returns, therefore interference can be generated to the optical detector of the position, it is unfavorable for fingerprint detection.
Summary of the invention
The embodiment of the present invention provides a kind of display panel and display device, to eliminate the spurious rays of wide-angle, to mention
The sensitivity of high optics fingerprint recognition.
In a first aspect, the embodiment of the present invention provides a kind of display panel, comprising: the array substrate set relatively and opposite base
Plate, the optical detector between the array substrate and the opposite substrate, and be located at the opposite substrate and deviate from institute
State the transparent dielectric layer with setting figure of array substrate side；
Wherein, the refractive index of the transparent dielectric layer is greater than the refractive index for the component being in contact with the transparent dielectric layer.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
Matter layer includes multiple hollowed out areas being arranged in array.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, the vacancy section
Domain is at least partly overlapping in the orthographic projection of the array substrate in the orthographic projection of the array substrate and the optical detector.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, the light
It learns detector and covers the 100-200 hollowed out areas in the positive throwing of the array substrate in the orthographic projection of the array substrate
Shadow.
In one possible implementation, multiple described to engrave in above-mentioned display panel provided in an embodiment of the present invention
The shape of empty region is identical, and size is identical.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, the vacancy section
The shape in domain is rectangle or diamond shape.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
Matter layer includes block structure that is multiple mutually discrete and being arranged in array.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, the blocky knot
Void area between structure the array substrate orthographic projection and the optical detector the array substrate orthographic projection
It is at least partly overlapping.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
Matter layer is located at the surface that the opposite substrate deviates from the array substrate side；
The refractive index of the transparent dielectric layer is greater than the refractive index of the opposite substrate.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, further includes: be located at
The opposite substrate deviates from the polaroid of the array substrate side；
The transparent dielectric layer is located at the surface that the polaroid deviates from the opposite substrate side；
The refractive index of the transparent dielectric layer is greater than the refractive index of the polaroid.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
The refractive index of matter layer is 1.8-2.1.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
Matter layer is one of tin indium oxide, tin-antiomony oxide or aluminum zinc oxide.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, transparent Jie
The thickness of matter layer is uniform.
In one possible implementation, in above-mentioned display panel provided in an embodiment of the present invention, further includes: be located at
Liquid crystal layer between the array substrate and the opposite substrate；
The optical detector is between the array substrate and the liquid crystal layer.
Second aspect, the embodiment of the present invention provide a kind of display device, including any of the above-described display panel.
The present invention has the beneficial effect that:
Display panel provided in an embodiment of the present invention and display device, comprising: the array substrate set relatively and opposite base
Plate, the optical detector between array substrate and opposite substrate, and positioned at opposite substrate away from array substrate side
Transparent dielectric layer with setting figure；Wherein, the refractive index of transparent dielectric layer is greater than the component being in contact with transparent dielectric layer
Refractive index.The total reflection property of light is utilized in above-mentioned display panel provided in an embodiment of the present invention, when light is being incident on
When the interface of bright dielectric layer and the component of contact, by the way that reasonable refractive index difference is arranged, finger can be made to be reflected into transparent Jie
The critical angle high angle scattered light that is greater than or equal to of matter layer is reflected back toward finger side, and reflection light is that can not be incident on display panel
It is internal；And the low-angle light of transparent dielectric layer is reflected by finger, it can directly pass through transparent dielectric layer or transparent dielectric layer
The unlapped region of figure is incident to display panel inside, and light received by such optical detector is corresponding position
Fingerprint reflection low-angle light, avoid other positions fingerprint reflection high angle scattered light incidence, that is, reduce light
The noise for learning detector is conducive to the detection sensitivity for improving optical detector.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, attached drawing described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the light path principle figure of finger reflection light in the prior art；
Fig. 2 is one of the cross section structure schematic diagram of display panel provided in an embodiment of the present invention；
Fig. 3 is the light path principle figure of finger reflection light provided in an embodiment of the present invention；
Fig. 4 is the connection circuit diagram of optical detector provided in an embodiment of the present invention；
Fig. 5 is one of the overlooking structure diagram of transparent dielectric layer provided in an embodiment of the present invention；
Fig. 6 is one of hollowed out area provided in an embodiment of the present invention and the positional diagram of optical detector；
Fig. 7 is the two of transparent dielectric layer overlooking structure diagram provided in an embodiment of the present invention；
Fig. 8 is the three of transparent dielectric layer overlooking structure diagram provided in an embodiment of the present invention；
Fig. 9 is the four of transparent dielectric layer overlooking structure diagram provided in an embodiment of the present invention；
Figure 10 is one of block structure provided in an embodiment of the present invention and the positional diagram of optical detector；
Figure 11 is the two of the positional diagram of block structure provided in an embodiment of the present invention and optical detector；
Figure 12 is the two of the cross section structure schematic diagram of display panel provided in an embodiment of the present invention；
Figure 13 is the three of the cross section structure schematic diagram of display panel provided in an embodiment of the present invention；
Figure 14 is the overlooking structure diagram of display device provided in an embodiment of the present invention.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with attached drawing and implementation
The present invention will be further described for example.However, example embodiment can be implemented in a variety of forms, and it is not understood as limited to
Embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention more comprehensively and completely, and by example embodiment party
The design of formula is comprehensively communicated to those skilled in the art.Identical appended drawing reference indicates same or similar knot in figure
Structure, thus repetition thereof will be omitted.The word of expression position and direction described in the present invention, is to be with attached drawing
The explanation that example carries out, but can also make a change as needed, done change is all contained in the scope of the present invention.The present invention
Attached drawing be only used for signal relative positional relationship do not represent actual proportions.
It should be noted that elaborating detail in the following description to fully understand the present invention.But this hair
Bright to be different from other way described herein with a variety of and be implemented, those skilled in the art can be without prejudice in the present invention
Similar popularization is done in the case where culvert.Therefore the present invention is not limited by following public specific embodiment.Specification is subsequent to be retouched
It states to implement the better embodiment of the application, so the description is not being used for the purpose of the rule for illustrating the application
To limit scope of the present application.The protection scope of the application is as defined by the appended claims.
With reference to the accompanying drawing, display panel provided in an embodiment of the present invention and display device are specifically described.Wherein,
The thickness of each component and shape do not reflect the actual proportions of display device in attached drawing, and purpose is schematically illustrate the content of present invention.
Fig. 1 is the light path principle figure of finger reflection light in the prior art, when the surface of finger touch display panel,
For emergent light in display panel to finger incidence, the light after being reflected by finger is as shown in Figure 1, wherein is recessed by finger print
Paddy position reflection light a1 with the opposite substrate 12 of large angle incidence to display panel, and the surface of opposite substrate generation
After anaclasis, refracted light a1 ' is incident to optical detector 13；And by the ridge position of finger print protrusion reflection light b1 with
Low-angle is incident on the opposite substrate 12 of display panel, and after anaclasis occurs for the surface of opposite substrate, is incident on same light
Learn detector 13.But the optical detector is the optical detector corresponding to ridge position, for detecting the fingerprint at the position
Reflection light, therefore, the high angle scattered light a1 of paddy position reflection belong to influence optical detector in the incident optical detector
The noise light of detection sensitivity.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of display panel, and Fig. 2 mentions for the embodiment of the present invention
The cross section structure schematic diagram of the display panel of confession, as shown in Fig. 2, display panel provided in an embodiment of the present invention, comprising: it is opposite and
The array substrate 11 and opposite substrate 12 set, the optical detector 13 between array substrate 11 and opposite substrate 12, and
Positioned at opposite substrate 12 away from the transparent dielectric layer 14 with setting figure of 11 side of array substrate；Wherein, transparent dielectric layer
14 refractive index is greater than the refractive index for the component being in contact with transparent dielectric layer.
In the specific implementation, when finger touch display panel, the emergent light of display panel is incident on finger, and by hand
Digital reflex echo shows panel itself, is acquired by the optical detector 13 inside display panel, due to the valley and a ridge position of finger print
The intensity difference for being reflected back optical detector 13 is set, therefore the fingerprint of finger can be detected.
As shown in Fig. 2, display panel provided in an embodiment of the present invention deviates from the side of array substrate 11 in opposite substrate 12
One layer of transparent dielectric layer 14 with setting figure is set, and the refractive index of transparent dielectric layer 14 is greater than and 14 phase of transparent dielectric layer
The refractive index of the component of contact.At the interface that two kinds of different light transmission mediums of refractive index are in contact, light is by optically denser medium (refraction
The biggish medium of rate) to when optically thinner medium (the lesser medium of refractive index) incidence, incidence angle is greater than or equal to the light of the angle of total reflection
Line can be totally reflected at the interface, will be unable to be incident on light and dredge to be situated between more than or equal to the high angle scattered light of the angle of total reflection in this way
Matter is all reflected；Incident it can only enter in optically thinner medium less than the low-angle light of the angle of total reflection.
Specifically, Fig. 3 is the light path principle figure of finger reflection light provided in an embodiment of the present invention, as shown in figure 3, this
The total reflection property of light is utilized in the above-mentioned display panel that inventive embodiments provide, when light be incident on transparent dielectric layer 14 with
When the interface of the component of contact, by the way that reasonable refractive index difference is arranged, finger can be made to be reflected into the big of transparent dielectric layer 14
It is reflected back toward finger side in or equal to the high angle scattered light a2 of the angle of total reflection, reflection light a2 ' can not be incident on display surface
Intralamellar part；And the low-angle light b2 of transparent dielectric layer 14 is reflected by finger, it can directly pass through transparent dielectric layer 14 or saturating
The unlapped region of bright 14 figure of dielectric layer is incident to display panel inside, and light received by such optical detector 13 is equal
For the low-angle light that the fingerprint of corresponding position reflects, entering for the high angle scattered light of the fingerprint reflection of other positions is avoided
It penetrates, that is, reduces the noise of optical detector, be conducive to the detection sensitivity for improving optical detector.
In the specific implementation, light sensitive component can be selected in optical detector 13, and light sensitive component generally has the function of light sensing
Can, electric signal can be converted optical signal into.Also, light sensitive component can detecte the power of light, when detecting the strong of light
Weak when changing, the electric signal that light sensitive component generates also changes accordingly.When the display surface of finger contact display panel
When, reflectivity when light being caused to be irradiated to corresponding with the other positions display panel of finger is different, and then multiple light sensitive components
The reflection light intensity received is also different, and the photoelectric current for causing multiple light sensitive components to be converted to is of different sizes.According to light
Size of current can carry out identifying the light sensitive component of finger covering, and the size of current of multiple photo cells is integrated, can be with
Identify the location information of finger.
In embodiments of the present invention, photodiode can be used in above-mentioned optical detector, and Fig. 4 provides for the embodiment of the present invention
Photodiode connection circuit diagram, as shown in figure 4, array substrate 11 further include along first direction Y extend fingerprint
Signal wire 101, the finger scan line 102 that X extends in a second direction, 102 transposition insulator of fingerprint signal line 101 and finger scan line
Limit multiple photodiodes (13) region.In the area further include: switching transistor 103, switching transistor 103
Grid g be electrically connected with finger scan line 102, source electrode s is electrically connected with the cathode n of photodiode, drain electrode d and fingerprint signal line
101 electrical connections, the positive p connection bias voltage Vbias of photodiode, the cathode n connection reference voltage of photodiode
Vref.Reference voltage Vref is the fixed voltage that outside is supplied to photodiode (13) cathode n, alternatively, reference voltage
Vref is the fixed voltage that fingerprint signal line 101 is supplied to photodiode (13) cathode n.
Finger scan line 102 is electrically connected with the grid g of switching transistor 103, can be by providing to finger scan line 102
Electric signal starts switch transistor 103, and the cathode n of photodiode is charged to reference voltage by fingerprint signal line 101
The corresponding level of Vref.When photodiode has illumination, the corresponding reference voltage Vref meeting of the cathode n of photodiode
It changes, i.e., when the display surface of finger contact display panel, occurs when light source is irradiated in the valley and a ridge of finger print anti-
It penetrates, since the reflection angle of valley and a ridge and the intensity of illumination that reflects back are different, by light projection to photodiode, causes light
The resistance value of electric diode changes, so that electric current changes, which passes through switching transistor 103 in the conductive state
Outflow is to fingerprint signal line 101, so that the fingerprint recognition signal receiving unit being connected with fingerprint signal line 101 identifies fingerprint
Valley and a ridge.
Working principle of the embodiment of the present invention only using photodiode as detector is illustrated, in practical application
In, it can also be using other light-sensitive elements as above-mentioned optical detector, it is not limited here.
Fig. 5 is one of the overlooking structure diagram of transparent dielectric layer 14 provided in an embodiment of the present invention, as shown in figure 5, this
The transparent dielectric layer 14 that inventive embodiments provide includes multiple hollowed out areas 141 being arranged in array.It is carried on the back when in opposite substrate 12
After the side setting biggish transparent dielectric layer of refractive index from array substrate 11, so that it may be prevented using the total reflection property of light
The reflection light of wide-angle is incident on inside display panel, but is directed to for the reflection light of low-angle if thoroughly through one layer
Bright dielectric layer, which is again incident on display panel, can slacken originally just faint intensity of reflected light, therefore transparent dielectric layer 14 is arranged more
A hollowed out area allows the reflection light of low-angle to enter the inside of display panel directly through hollow out incidence, avoids to anti-
Light is penetrated to decay once again.
Fig. 6 is the two of the overlooking structure diagram of transparent dielectric layer 14 provided in an embodiment of the present invention, as shown in fig. 6, this
Inventive embodiments make hollowed out area 141 exist in the orthographic projection of array substrate 11 and optical detector 13 when hollowed out area is arranged
The orthographic projection of array substrate 11 is at least partly overlapping.Need to penetrate transparent dielectric layer 14 to display panel by the light that finger reflects
In optical detector 13 it is incident, in order to allow the reflection light of low-angle to be directed through the hollowed out area of bright dielectric layer 14
141, to incidence inside display panel, can be correspondingly arranged hollowed out area 141 in optical detector position, can use up in this way
The light that low-angle may be limited reaches optical detector 13 directly through hollowed out area 141.
In practical applications, the either size of the pixel unit of optical detector 13 or display panel all very littles are
The low-angle light of each position passes through the hollowed out area 141 of transparent dielectric layer 14 to optical detector inside display panel
13 is incident, needs for be arranged hollowed out area 141 more more intensive better.Therefore the embodiment of the present invention technique allow in the case where,
Increase the density of setting of hollowed out area 141, the setting size of hollowed out area 141 is reduced, so that an optical detector 13 is in battle array
The orthographic projection of column substrate 11 can be overlapped with multiple hollowed out areas 141 in the orthographic projection of array substrate 11.In the specific implementation, may be used
100-200 hollowed out area 141 is covered in array substrate so that an optical detector 13 is arranged in the orthographic projection of array substrate 11
11 orthographic projection.With the progress of manufacture craft, the size of hollowed out area 141 can also be further decreased, so that optical detection
Device 13 is corresponding with more hollowed out areas 141, the not specific size to hollowed out area 141 and and optics of the embodiment of the present invention
The corresponding relationship of detector is defined.
For convenience of manufacture, as shown in figure 5, hollowed out area 141 can be set to identical shape and identical ruler
It is very little.In the specific implementation, it can be initially formed the transparent dielectric layer 14 of flood, then transparent dielectric layer 14 is performed etching, to be formed
Transparent dielectric layer with hollowed out area 141.
In practical applications, hollowed out area 141 can be set to rectangle as shown in Figure 5；Alternatively, as shown in Figure 7 is another
The overlooking structure diagram of one transparent dielectric layer can also set diamond structure for hollowed out area 141.In addition to this, may be used also
Hollowed out area to be provided in round, ellipse or Else Rules figure or the irregular figure such as polygon, transparent dielectric layer 14
It can also simultaneously include hollowed out area of different shapes, the embodiment of the present invention is herein without limitation.As long as in transparent dielectric layer
The hollowed out area of setting setting figure is so that the low-angle light of finger reflection can be directly incident on optical detector on 14
Embodiment all belongs to the scope of protection of the present invention.
Fig. 8 is the overlooking structure diagram of another transparent dielectric layer provided in an embodiment of the present invention, as shown in figure 8, this
The above-mentioned transparent dielectric layer 14 that inventive embodiments provide can also be arranged to include block that is multiple mutually discrete and being arranged in array
Shape structure 142.The block structure 142 can be set to rectangle as shown in Figure 8, equally can be set to water chestnut as shown in Figure 9
Shape, it is not limited here.Mutually discrete block structure 142 is set by transparent dielectric layer 14, it can be to block structure 142
If position and density flexible setting, more more dense blocky knots can be set for the intermediate position of display panel viewing area
Structure then can the opposite setting quantity for reducing block structure for the marginal position of viewing area for shielding light noise.Except this
Except, setting position and the size of block structure can be changed according to actual needs, it is not limited here.
Figure 10 is transparent dielectric layer provided in an embodiment of the present invention and optical detector positional diagram, such as Figure 10 institute
Show, the void area between block structure is arranged in optical detector 13 by the embodiment of the present invention, so that between block structure 142
Void area it is at least partly overlapping in the orthographic projection of array substrate 11 in the orthographic projection of array substrate 11 and optical detector 13.
Similarly, when block structure 142 is set as diamond structure as shown in figure 11, optical detector 13 still can correspond to block
Gap area between shape structure 142.Optical detector is as often as possible arranged in the gap area institute between block structure 142
Corresponding position, so that it may so that the low-angle light reflected by finger can be directly incident by gap between block structure 142
To optical detector 13, so that optical detector determines finger print according to the strength difference of the reflection light received.In reality
In the application of border, the spacing between block structure 142 can reduce as far as possible, and an optical detector 13 is allow to correspond to multiple blocky knots
Gap area between structure 142 and block structure, such block structure 142 can mask the reflecting background of wide-angle, and
The reflection light of low-angle can be directly incident on optical detector by the gap area of block structure.
In order to avoid the high angle scattered light reflected by finger is incident on inside display panel, above-mentioned transparent dielectric layer 14 can be with
The position for being more nearly finger is set.As shown in Fig. 2, when display panel includes array substrate 11 and opposite substrate 12, thoroughly
Bright dielectric layer 14, which can be set, deviates from the surface of 11 side of array substrate in opposite substrate 12；At this point, the folding of transparent dielectric layer 14
The rate of penetrating needs the refractive index greater than opposite substrate 12.Opposite substrate 12 generally uses glass substrate and surfacing, by transparent Jie
The surface of opposite substrate 12 is arranged in matter layer 14, then to the patterned technique relative maturity of transparent dielectric layer 14 on glass.
In addition to this, also adjustable when display panel is when the outside of opposite substrate 12 also has other film layer structures
The position of transparent dielectric layer.Figure 12 is another cross section structure schematic diagram of display panel provided in an embodiment of the present invention, such as Figure 12
It is shown, display panel provided in an embodiment of the present invention further include: deviate from the polarisation of 11 side of array substrate positioned at opposite substrate 12
Piece 15；The surface that polaroid 15 deviates from 12 side of opposite substrate can also be arranged in transparent dielectric layer 14；At this point, transparent dielectric layer
14 refractive index needs the refractive index greater than polaroid 15.Under normal conditions, a polaroid can be arranged in the light emission side of display panel,
Such as two orthogonal polaroids in polarization direction, organic light-emitting diode display face can be arranged in the two sides of liquid crystal display panel
Rotatory polarization piece can be arranged in the light emission side of display panel in plate.The refractive index of polaroid 15, will be transparent close to the refractive index of glass
When surface of the polaroid 15 away from 12 side of opposite substrate is arranged in dielectric layer 14, need to guarantee the refractive index of transparent dielectric layer 14
Greater than the refractive index of polaroid, it is just able to achieve the total reflection to wide-angle reflection light.
As described above, the refractive index of opposite substrate 12 and polaroid 15 is close with glass, the refractive index of glass is 1.5, because
This can select the material that refractive index is 1.8-2.1 to make transparent dielectric layer 14.According to total reflection condition α >=arcsin (n12/
n14), α is incident angle, n12Indicate the refractive index of opposite substrate 12, n14The refractive index for indicating transparent dielectric layer 14, works as n14More
Greatly, then arcsin (n12/n14) value is smaller, illustrate less by the large angle incidence light of transparent dielectric layer.Work as n14When=2.1,
Light of the incident angle more than or equal to 45.6 ° is calculated and will be realized in transparent dielectric layer 14 according to above-mentioned formula and is all-trans
It penetrates, and is unable to reach optical detector 13 and interferes.Work as n14When=2.0, it is big that incident angle is calculated according to above-mentioned formula
Total reflection will be realized in transparent dielectric layer 14 in or equal to 48.6 ° of light.Work as n14When=1.8, calculated according to above-mentioned formula
The interference light that incident angle is greater than or equal to 56.4 ° is obtained, optical fingerprint sensor sensitivity is thus improved.
In the specific implementation, transparent dielectric layer 14 can be used one of tin indium oxide, tin-antiomony oxide or aluminum zinc oxide into
Row production.Tin indium oxide, tin-antiomony oxide or aluminum zinc oxide are transparent conductive material, and layer of transparent is arranged in the outside of display panel
Conductive material, then by the electrostatic screen device of transparent conductive material connection display panel, can be used for guiding electrostatic.In addition,
When making transparent dielectric layer 14, the thickness of 14 each position of transparent dielectric layer can be kept uniform, it is saturating to easily facilitate calculating in this way
The total reflection angle of bright dielectric layer 14, to be conducive to the selection to material.
Above-mentioned display panel provided in an embodiment of the present invention can be liquid crystal display panel, as shown in fig. 13 that LCD display
The cross section structure schematic diagram of plate, liquid crystal display panel further include: the liquid crystal layer between array substrate 11 and opposite substrate 12
16；Optical detector 13 is between array substrate 11 and liquid crystal layer 16.As described above, photoelectricity two can be used in optical detector 13
Pole pipe, the active array of shared array substrate realize the scanning to optical signal of each photodiode.In order to improve optical detection
Device 13 receives the intensity of finger reflection light, optical detector 13 can be arranged in array substrate towards opposite substrate side
In closer film layer, so that optical detector 13 is closer at a distance from finger, is conducive to the reflection light for receiving finger, reduces light
Signal is decayed by the signal after other film layers.And in practical applications, in order to make optical detector 13 closer to array base
The thin film transistor (TFT) array of board bottom layer, optical detector can also be arranged between thin film transistor (TFT) array and pixel electrode layer
Between any two insulating layer, it is not limited here.
Based on the same inventive concept, the embodiment of the present invention also provides a kind of display device, which includes above-mentioned
One display panel.The display device can show equipment for liquid crystal display panel, liquid crystal display, LCD TV etc., or have
Machine light emitting diode (Organic Light Emitting Diode, OLED) panel, OLED display, OLED TV or electronics
The display devices such as paper.Figure 14 is the overlooking structure diagram of display device provided in an embodiment of the present invention, as shown in figure 14, above-mentioned
Display device may be the mobile terminal devices such as mobile phone, tablet computer, electron album, it is not limited here.Due to the display
The principle that device solves the problems, such as is similar to above-mentioned display panel, therefore the implementation of the display device may refer to above-mentioned display panel
Implementation, overlaps will not be repeated.
Display panel provided in an embodiment of the present invention and display device, comprising: the array substrate set relatively and opposite base
Plate, the optical detector between array substrate and opposite substrate, and positioned at opposite substrate away from array substrate side
Transparent dielectric layer with setting figure；Wherein, the refractive index of transparent dielectric layer is greater than the component being in contact with transparent dielectric layer
Refractive index.The total reflection property of light is utilized in above-mentioned display panel provided in an embodiment of the present invention, when light is being incident on
When the interface of bright dielectric layer and the component of contact, by the way that reasonable refractive index difference is arranged, finger can be made to be reflected into transparent Jie
The critical angle high angle scattered light that is greater than or equal to of matter layer is reflected back toward finger side, and reflection light is that can not be incident on display panel
It is internal；And the low-angle light of transparent dielectric layer is reflected by finger, it can directly pass through transparent dielectric layer or transparent dielectric layer
The unlapped region of figure is incident to display panel inside, and light received by such optical detector is corresponding position
Fingerprint reflection low-angle light, avoid other positions fingerprint reflection high angle scattered light incidence, that is, reduce light
The noise for learning detector is conducive to the detection sensitivity for improving optical detector.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of display panel characterized by comprising the array substrate and opposite substrate set relatively are located at the array
Optical detector between substrate and the opposite substrate, and positioned at the opposite substrate away from the array substrate side
Transparent dielectric layer with setting figure；
Wherein, the refractive index of the transparent dielectric layer is greater than the refractive index for the component being in contact with the transparent dielectric layer.
2. display panel as described in claim 1, which is characterized in that the transparent dielectric layer includes multiple is arranged in array
Hollowed out area.
3. display panel as claimed in claim 2, which is characterized in that orthographic projection of the hollowed out area in the array substrate
It is at least partly overlapping in the orthographic projection of the array substrate with the optical detector.
4. display panel as claimed in claim 3, which is characterized in that an optical detector is in the array substrate
Orthographic projection covers the 100-200 hollowed out areas in the orthographic projection of the array substrate.
5. display panel as claimed in claim 2, which is characterized in that the shape of multiple hollowed out areas is identical, size phase
Together.
6. display panel as claimed in claim 5, which is characterized in that the shape of the hollowed out area is rectangle or diamond shape.
7. display panel as described in claim 1, which is characterized in that the transparent dielectric layer includes multiple mutually discrete and is in
The block structure of array arrangement.
8. display panel as claimed in claim 7, which is characterized in that the void area between the block structure is in the battle array
The orthographic projection of column substrate and the optical detector are at least partly overlapping in the orthographic projection of the array substrate.
9. such as the described in any item display panels of claim 1-8, which is characterized in that the transparent dielectric layer is located at the opposite direction
Substrate deviates from the surface of the array substrate side；
The refractive index of the transparent dielectric layer is greater than the refractive index of the opposite substrate.
10. such as the described in any item display panels of claim 1-8, which is characterized in that further include: it is located at the opposite substrate and carries on the back
Polaroid from the array substrate side；
The transparent dielectric layer is located at the surface that the polaroid deviates from the opposite substrate side；
The refractive index of the transparent dielectric layer is greater than the refractive index of the polaroid.
11. display panel as claimed in claim 10, which is characterized in that the refractive index of the transparent dielectric layer is 1.8-2.1.
12. display panel as claimed in claim 11, which is characterized in that the transparent dielectric layer is tin indium oxide, tin oxide
One of antimony or aluminum zinc oxide.
13. such as the described in any item display panels of claim 1-8, which is characterized in that the thickness of the transparent dielectric layer is uniform.
14. such as the described in any item display panels of claim 1-8, which is characterized in that further include: be located at the array substrate with
Liquid crystal layer between the opposite substrate；
The optical detector is between the array substrate and the liquid crystal layer.
15. a kind of display device, which is characterized in that including display panel according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579418.5A CN110287920B (en) | 2019-06-29 | 2019-06-29 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579418.5A CN110287920B (en) | 2019-06-29 | 2019-06-29 | Display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110287920A true CN110287920A (en) | 2019-09-27 |
| CN110287920B CN110287920B (en) | 2021-11-19 |
Family
ID=68020087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910579418.5A Active CN110287920B (en) | 2019-06-29 | 2019-06-29 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110287920B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110647861A (en) * | 2019-09-29 | 2020-01-03 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| CN110674776A (en) * | 2019-09-30 | 2020-01-10 | 厦门天马微电子有限公司 | Display panel and display device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619586A (en) * | 1990-12-20 | 1997-04-08 | Thorn Emi Plc | Method and apparatus for producing a directly viewable image of a fingerprint |
| CN105678255A (en) * | 2016-01-04 | 2016-06-15 | 京东方科技集团股份有限公司 | Optical fingerprint identification display screen and display device |
| CN106873284A (en) * | 2017-04-10 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of display device and its control method |
| CN107092892A (en) * | 2017-04-27 | 2017-08-25 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN107423728A (en) * | 2017-09-07 | 2017-12-01 | 京东方科技集团股份有限公司 | Optical texture and preparation method thereof, display base plate and display device |
| CN108399392A (en) * | 2018-03-07 | 2018-08-14 | 京东方科技集团股份有限公司 | Fingerprint recognition structure and display device |
| CN108734134A (en) * | 2018-05-22 | 2018-11-02 | 京东方科技集团股份有限公司 | Fingerprint identification device |
| CN108764098A (en) * | 2018-05-21 | 2018-11-06 | 武汉天马微电子有限公司 | A kind of display panel and display device |
| CN109343257A (en) * | 2018-11-20 | 2019-02-15 | 厦门天马微电子有限公司 | Display panel and display device |
-
2019
- 2019-06-29 CN CN201910579418.5A patent/CN110287920B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619586A (en) * | 1990-12-20 | 1997-04-08 | Thorn Emi Plc | Method and apparatus for producing a directly viewable image of a fingerprint |
| CN105678255A (en) * | 2016-01-04 | 2016-06-15 | 京东方科技集团股份有限公司 | Optical fingerprint identification display screen and display device |
| CN106873284A (en) * | 2017-04-10 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of display device and its control method |
| CN107092892A (en) * | 2017-04-27 | 2017-08-25 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN107423728A (en) * | 2017-09-07 | 2017-12-01 | 京东方科技集团股份有限公司 | Optical texture and preparation method thereof, display base plate and display device |
| CN108399392A (en) * | 2018-03-07 | 2018-08-14 | 京东方科技集团股份有限公司 | Fingerprint recognition structure and display device |
| CN108764098A (en) * | 2018-05-21 | 2018-11-06 | 武汉天马微电子有限公司 | A kind of display panel and display device |
| CN108734134A (en) * | 2018-05-22 | 2018-11-02 | 京东方科技集团股份有限公司 | Fingerprint identification device |
| CN109343257A (en) * | 2018-11-20 | 2019-02-15 | 厦门天马微电子有限公司 | Display panel and display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110647861A (en) * | 2019-09-29 | 2020-01-03 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| CN110647861B (en) * | 2019-09-29 | 2022-06-03 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| CN110674776A (en) * | 2019-09-30 | 2020-01-10 | 厦门天马微电子有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110287920B (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10665631B1 (en) | Display panel and display device | |
| US10361255B2 (en) | Display panel and display device | |
| US10747978B2 (en) | Organic light-emitting display panel manufacturing method thereof as well as electronic device | |
| CN107195675B (en) | Display screen, display device and mobile terminal | |
| CN107092892B (en) | Display panel and display device | |
| US10296777B2 (en) | Display panel and display apparatus | |
| US11093092B2 (en) | Display panel and display device | |
| US20230123066A1 (en) | Display panel and display device | |
| CN110427931B (en) | Array substrate and display device | |
| CN108229394A (en) | Display panel and display device | |
| CN108983468A (en) | A kind of display device | |
| US11538871B2 (en) | Array substrate and fabricating method thereof, and display apparatus | |
| CN106605169A (en) | Liquid crystal display device and display device substrate | |
| WO2019148798A1 (en) | Pattern identification device and display apparatus | |
| CN113994253B (en) | Display device and method for manufacturing the same | |
| WO2021136342A1 (en) | Fingerprint recognition device, fingerprint recognition display substrate, and fabrication method therefor | |
| CN112596294A (en) | Display device, display panel and manufacturing method thereof | |
| CN109145859A (en) | A kind of display panel, its detection method and display device | |
| CN111160323A (en) | Display panel and electronic device | |
| US11887401B2 (en) | Display backplane, manufacturing method thereof, and full-screen fingerprint identification display device | |
| CN110287920A (en) | A kind of display panel and display device | |
| CN110245631A (en) | Display panel and fingerprint recognition display device | |
| KR20220055524A (en) | Fingerprint sensor and display device including the same | |
| CN111092109B (en) | Display panel and display device | |
| CN113777819A (en) | Display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |