CN206058222U - A kind of fingerprint recognition display device - Google Patents
A kind of fingerprint recognition display device Download PDFInfo
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- CN206058222U CN206058222U CN201620831904.3U CN201620831904U CN206058222U CN 206058222 U CN206058222 U CN 206058222U CN 201620831904 U CN201620831904 U CN 201620831904U CN 206058222 U CN206058222 U CN 206058222U
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Abstract
The utility model discloses a kind of fingerprint recognition display device, on the exiting surface of display floater, light guide plate is set, the luminous component of the modulation light using total reflection mode transmission, and the multiple light-inductive units being arranged in array being arranged on below light guide plate can be emitted between the display surface of light guide plate to display device.In the display surface of user's finger contacts display device, transmitted in total reflection herein as modulation light can be destroyed when display surface is contacted at the ridge position of fingerprint, modulation light is reflexed to into the light-inductive unit of lower section, and the total reflection transmission for not interfering with modulation light at the paddy position of fingerprint, is not contacted with display surface, light-inductive unit below will not receive modulation light, therefore, can realize detecting fingerprint based on light sensitive effect by light-inductive unit, interference is not likely to produce with display device internal part, and it is not easily susceptible to the impact of distance between light-inductive unit and the display surface of display device, high-quality fingerprint detection is realized easily.
Description
Technical field
This utility model is related to display technology field, more particularly to a kind of fingerprint recognition display device.
Background technology
With developing rapidly for Display Technique, the display floater with fingerprint identification function is gradually throughout the life of people
In work.At present, fingerprint recognition display floater usually realizes the function of identification fingerprint, such as embedded finger using capacitance type structure
Stricture of vagina identification display floater is that capacitance type fingerprint identification component is arranged on inside display floater, and which is conducive to display floater frivolous
Change, but capacitance type fingerprint identification component easily produces parasitic capacitance with the part inside display floater, make fingerprint recognition detect letter
Number and show signal between interfere, so as to affect the quality of fingerprint recognition.
Utility model content
In view of this, this utility model embodiment provides a kind of fingerprint recognition display device, to based on light sensitive effect
And light total reflection condition realizes efficiently detecting fingerprint function in media as well.
Therefore, this utility model embodiment provides a kind of fingerprint recognition display device, including：Display floater, is arranged at
Light guide plate on the exiting surface of the display floater, for the modulation light that makes to send in the light guide plate to the display device
Display surface between using total reflection mode transmission luminous component, and be arranged at being arranged in array below the light guide plate
Multiple light-inductive units.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the light-inductive unit is specifically included：For sensing the light sensitive diode of the modulation light of reflection at fingerprint median ridge, Yi Jiyong
Controlling switch transistor that current potential export is converted to by light is modulated in the light sensitive diode is controlled；
The fingerprint recognition display device, also includes：For sweeping to the corresponding controlling switch transistor load identification
The identification scan line of signal is retouched, and is used for negative to light sensitive diode loading by the corresponding controlling switch transistor
To the identification output lead for exporting the signal of telecommunication for biasing or reading the light sensitive diode；Wherein,
Each identification scan line is corresponded with light-inductive unit described in each row, each described to recognize output lead and each row
The light-inductive unit is corresponded；Or, each identification scan line is corresponded with each row light-inductive unit, respectively
The identification output lead is corresponded with light-inductive unit described in each row.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, each light-inductive unit, each identification scan line and each identification scan line are arranged in the display floater
Black matrix institute overlay area in.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, each light-inductive unit, each identification scan line and each identification scan line are arranged at leaning on for the light guide plate
On the surface of the nearly display floater；Or be arranged inside the display floater.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, also include：It is arranged at the surface of the close described display floater of the light guide plate and is located at the light guide plate and each light
Transparent reflection film layer between quick sensing unit；Refractive index of the refractive index of the transparent reflection film layer less than the light guide plate.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the material of the transparent reflection film layer is inorganic material.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the light guide plate is to be arranged at the cover sheet on the display floater；The cover sheet is towards the display surface
There is at the frame of plate side groove structure, the luminous component is positioned in the groove structure.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the light guide plate is arranged between the display floater and the cover sheet on the display floater；It is described luminous
Part is positioned at least two relative sides of the light guide plate.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the luminous component is the OLED or LED light source for sending modulated infrared light or modulation visible ray.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, also include：The light-blocking member being arranged on the luminous component, the light-blocking member just throwing on said display panel
Shadow at least covers the orthographic projection of the luminous component.
The beneficial effect of this utility model embodiment includes：
A kind of fingerprint recognition display device that this utility model embodiment is provided, is arranged on the exiting surface of display floater
Light guide plate, can be emitted between the display surface of light guide plate to display device the illuminating part of the modulation light using total reflection mode transmission
Part, and the multiple light-inductive units being arranged in array being arranged on below light guide plate.In user's finger contacts display device
Display surface when, at the rough ridge having on finger skin surface and paddy position for modulation light total reflection transmission
Affect different, transmitted in total reflection herein as modulation light can be destroyed when display surface is contacted at the ridge position of fingerprint, will modulation
Light reflexes to the light-inductive unit of lower section, and does not contact with display surface at the paddy position of fingerprint and do not interfere with being all-trans for modulation light
Transmission is penetrated, light-inductive unit below will not receive modulation light, therefore, light sensitive effect is based on by light-inductive unit
Can realize detecting fingerprint, interference, and light-inductive unit are not likely to produce for modulation with display device internal part
The reception of light is not easily susceptible to the impact of distance between light-inductive unit and the display surface of display device, easily realizes high-quality
The fingerprint detection of amount.
Description of the drawings
One of structural representation of fingerprint recognition display device that Fig. 1 is provided for this utility model embodiment；
The two of the structural representation of the fingerprint recognition display device that Fig. 2 is provided for this utility model embodiment；
The three of the structural representation of the fingerprint recognition display device that Fig. 3 is provided for this utility model embodiment；
The structural representation of light-inductive unit in the fingerprint recognition display device that Fig. 4 is provided for this utility model embodiment
Figure.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the fingerprint recognition display device for providing to this utility model embodiment is entered
Row is explained.
In accompanying drawing, the shapes and sizes of each part do not reflect the actual proportions of fingerprint recognition display device, and purpose is simply illustrated
Illustrate this utility model content.
This utility model embodiment provides a kind of fingerprint recognition display device, as shown in figure 1, including：Display floater
100, the light guide plate 200 being arranged on the exiting surface of display floater 100, for the modulation light that makes to send light guide plate 200 to
The luminous component 300 transmitted using total reflection mode between the display surface A of display device, and be arranged at below light guide plate 200
The multiple light-inductive units 400 being arranged in array.
It should be noted that the display surface A in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
Refer to user oriented outermost surface in display device, it is understood that for the surface that can be touched by user's finger.Also,
The type of display floater 100 is not limited in this utility model embodiment, can be display panels, or electroluminescent
The panel display boards such as light emitting display panel.
In the above-mentioned fingerprint recognition display device that this utility model embodiment is provided, due to the display surface in display device
There is refractive index difference with the interface of external environment condition in A, the refractive index of general external environment is 1 or so, the display surface A of display device
The glass medium that generally refractive index is more than 1.5, therefore, modulation light is when the display surface A of display device meets total reflection angle
Can occur to be totally reflected the transmission in light guide plate 200.As the display surface A of user's finger contacts display device, due to the ridge B of fingerprint
Display surface A can be reduced in refractive index difference herein when display surface A is contacted at position, general finger can consider and be equal to refraction
Rate is 1.5 or so quality of rubber materials, destroys modulation light and transmits in total reflection herein, makes modulation light reflex to the photosensitive of lower section
Sensing unit 400；And do not contact with display surface A at the paddy location of C of fingerprint, it is not result in display surface A in refractivity herein
Mutation, so as to not interfere with the total reflection transmission of modulation light, light-inductive unit 400 below would not also receive tune
Light processed.Therefore, can realize detecting fingerprint based on light sensitive effect by light-inductive unit 400, in display device
Portion's part is not likely to produce interference, and light-inductive unit 400 for the reception of modulation light be not easily susceptible to light-inductive unit 400 with
The impact of distance between the display surface A of display device, you can to arrange between farther finger and light-inductive unit 400
Distance, easily realize high-quality fingerprint detection.
In the specific implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided, specifically can be with
Realize that luminous component 300 is sent with the bright dark alternate modulation light of the fixed frequency by way of loading fixed frequency signal, should
Modulation light can be different from the display that ambient light and display floater 100 send and use up, to avoid ambient light, display from using up, temperature with
And the factor such as parasitic capacitance is sensed for detecting the interference of the light of fingerprint for light-inductive unit 400.
Also, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided, luminous component 300 specifically may be used
Using the OLED or LED light source that send modulated infrared light or modulation visible ray, it is of course also possible to use LASER Light Source.Usually,
Luminous component 300 can be arranged at the marginal position of light guide plate 200, to ensure to reduce for the shadow of normal viewing area as far as possible
Ring.Also, in order that the modulation light in 200 internal transmission of light guide plate covers the whole surface of light guide plate 200 as far as possible, can lead
Two relative side edges of tabula rasa 200 are respectively provided with luminous component 300, it is also possible to be respectively provided with luminous component 300 in four side edges,
Here is not limited.
Specifically, when using OLED or LED light source as luminous component 300, OLED or LED light source can be to all directions
It is luminous, wherein, the light for being unsatisfactory for total reflection condition will not produce impact, the light for for example sending up or down to detecting fingerprint
Line and the parallel light penetrated in light guide plate 200 can project light guide plate 200, and the transmitting that is inclined upwardly is without reaching total reflection condition
Light, can a part of outgoing part reflection, can also be consumed or outgoing after reflecting for several times；Only more than total reflection
The light of angle meets the light of total reflection condition can be transmitted in 200 inner total reflection of light guide plate.
In the specific implementation, it is uneven due to there is emergent light and light intensity near the region of luminous component 300 in light guide plate 200
It is even, therefore can not be used for detecting fingerprint.Based on this, in order to avoid in light guide plate near luminous component 300 cannot be used for detecting
Fingerprint portion can produce impact to fingerprint detection, meanwhile, in order to avoid the light that luminous component 300 sends shows to display device
Show and use up generation interference, affect display picture quality, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, as shown in figure 1, can also include：The light-blocking member 500 being arranged on luminous component 300, i.e. light-blocking member 500 are arranged
In luminous component 300 near the display surface A sides of display device, and the orthographic projection of the light-blocking member 500 on display floater 100
The orthographic projection of luminous component 300 is covered at least, as shown in Figures 2 and 3,500 occupied area of general light-blocking member can be more than luminous
300 occupied area of part, so that the light of the non-total reflection transmission sent for luminous component 300 is blocked.Specifically, hide
Light part 500 can realize its function using black matrix material (BM).
In the specific implementation, this utility model embodiment is provided in above-mentioned fingerprint recognition display device, as shown in figure 1, leading
Tabula rasa 200 can specially be arranged at the cover sheet on display floater 100, i.e. 200 face of light guide plate away from display floater 100
Surface be display device display surface A.Now, as cover sheet has the work of the exiting surface of protection display floater 100
With, accordingly, it would be desirable to cover sheet covers whole display floater 100, in order that the modulation light that luminous component 300 sends can be in leaded light
Transmitted with total reflection mode in plate 200 i.e. cover sheet, needed in cover sheet at the frame towards 100 side of display floater
Groove structure is set, so that luminous component 300 is positioned in groove structure.This kind of structure design is due to needing to cover sheet
Grooving process is carried out, and needs light-blocking member 500 is made in groove, the complexity of processing technology can be increased.
Or, in the specific implementation, provide in above-mentioned fingerprint recognition display device in this utility model embodiment, such as Fig. 2
With shown in Fig. 3, light guide plate 200 can be separately set in display floater 100 with the cover sheet being located on display floater 100
Between 600.Now, luminous component 300 can be positioned at least two relative sides of light guide plate 200, also, in protection cap
Plate 600 makes light-blocking member 500 with 300 corresponding position of luminous component, and its processing technology is relatively easy.But, it is this kind of
In structure design, as the cover sheet 600 on the light guide plate 200 is the aobvious of display device away from the surface of light guide plate 200
Show face A, modulation light is at least needed to be transmitted with total reflection mode in 600 two film layers of light guide plate 200 and cover sheet, can be increased
Finger is unfavorable for the precision for guaranteeing to detect fingerprint the distance between to light-inductive unit 400.
In the specific implementation, provide in above-mentioned fingerprint recognition display device in this utility model embodiment, as shown in figure 4,
Light-inductive unit 400 can specifically include：For sensing the light sensitive diode 401 of the modulation light of reflection at fingerprint median ridge B, with
And controlling switch transistor 402 that current potential export is converted to by light is modulated for controlling light sensitive diode 401.Fingerprint recognition shows
Device, can also include：For the identification scan line 403 to 402 load identification scanning signal of corresponding controlling switch transistor,
And be used to load negative bias to light sensitive diode 401 by corresponding controlling switch transistor 402 or read photosensitive two pole
The identification output lead 404 of the output signal of telecommunication of pipe 401；Wherein, each identification scan line 403 and each row light-inductive unit 400 1
One correspondence, each identification output lead 404 are corresponded with each row light-inductive unit 400；Or, respectively recognizing scan line 403 and each row
Light-inductive unit 400 is corresponded, and each identification output lead 403 is corresponded with each row light-inductive unit 400.
In the specific implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided, for the ease of
By recognizing that scan line 403 is controlled to the conducting state of controlling switch transistor 402, will pass through controlling switch transistor
402 control light sensitive diodes 401 output the signals of telecommunication, as shown in figure 4, the grid of each controlling switch transistor 402 generally require with
Corresponding identification scan line 403 is connected, and source electrode is connected with one end of light sensitive diode 401, is drained and corresponding identification output lead
404 are connected；Also, in order to ensure that each light sensitive diode 401 can carry out opto-electronic conversion effect, each light sensitive diode 401 it is another
One end is typically connected with fixed potential.So, when the loading scanning signal of scan line 403 is recognized, at controlling switch transistor 402
In conducting state, identification output lead 404 is connected with 401 one end of light sensitive diode, by recognizing that output lead 404 can be to photosensitive two
401 one end of pole pipe loads negative bias or reads the signal of telecommunication of 401 one end of light sensitive diode output.
Further, in order that fingerprint recognition does not affect normal display, in the above-mentioned of this utility model embodiment offer
In fingerprint recognition display device, each light-inductive unit 400, each identification scan line and each identification scan line can typically be arranged at aobvious
Show in the black matrix institute overlay area in panel 100, that is, correspond to and each light-inductive list is set at the interstitial site between each pixel
First 400, it is each to recognize scan line and respectively recognize scan line.
Further, in the specific implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided,
Concrete set location of the light-inductive unit 400 below light guide plate 200, for example as depicted in figs. 1 and 2, each light are not limited
Quick sensing unit 400, each identification scan line and each identification scan line can be arranged at the close display floater 100 of light guide plate 200
Surface on, i.e., the lower surface in light guide plate 200 makes light-inductive unit 400；Or, as shown in figure 3, each light-inductive list
Unit 400, each identification scan line and each identification scan line can be arranged inside display floater 100, for example, be arranged on opposite substrate
Inner surface.It should be noted that the display surface A of 400 distance display device of light-inductive unit is more remote, light-inductive unit
400 is also more remote with the distance of finger, and this is unfavorable for the accuracy for ensureing detecting fingerprint.And light-inductive unit 400 is arranged
On the surface directly not contacted with light guide plate 200, can avoid in light-inductive unit 400 and 200 contact interface of light guide plate
Refractive index difference of the refractive index difference less than non-contact interface, and the possibility brought destroys total reflection transmission at contact interface,
Cause to detect the erroneous judgement of fingerprint.
Based on this, this utility model embodiment provide above-mentioned fingerprint recognition display device in, as shown in Figure 1 to Figure 3,
Can also include：It is arranged at the surface of the close display floater 100 of light guide plate 200 and is located at light guide plate 200 and each light-inductive
Transparent reflection film layer 700 between unit 400；Refractive index of the refractive index of the transparent reflection film layer 700 less than light guide plate 200,
General refractive index is less than 1.5.In this manner it is ensured that modulation light light guide plate 200 towards 400 side of light-inductive unit interface
Place carries out total reflection transmission.
Preferably, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided, transparent reflection film layer 700
Material be inorganic material, so can ensure that to bear in transparent reflection film layer 700 and make thereon light-inductive unit 400
During high-temperature technology.
This utility model embodiment provide above-mentioned fingerprint recognition display device can be：Mobile phone, panel computer, TV
Any product with display function such as machine, display, notebook computer, DPF, navigator or part.
The above-mentioned fingerprint recognition display device that this utility model embodiment is provided, is arranged on the exiting surface of display floater
Light guide plate, can be emitted between the display surface of light guide plate to display device the illuminating part of the modulation light using total reflection mode transmission
Part, and the multiple light-inductive units being arranged in array being arranged on below light guide plate.In user's finger contacts display device
Display surface when, at the rough ridge having on finger skin surface and paddy position for modulation light total reflection transmission
Affect different, transmitted in total reflection herein as modulation light can be destroyed when display surface is contacted at the ridge position of fingerprint, will modulation
Light reflexes to the light-inductive unit of lower section, and does not contact with display surface at the paddy position of fingerprint and do not interfere with being all-trans for modulation light
Transmission is penetrated, light-inductive unit below will not receive modulation light, therefore, light sensitive effect is based on by light-inductive unit
Can realize detecting fingerprint, interference, and light-inductive unit are not likely to produce for modulation with display device internal part
The reception of light is not easily susceptible to the impact of distance between light-inductive unit and the display surface of display device, easily realizes high-quality
The fingerprint detection of amount.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this practicality to this utility model
New spirit and scope.So, if it is of the present utility model these modification and modification belong to this utility model claim and
Within the scope of its equivalent technologies, then this utility model is also intended to comprising these changes and modification.
Claims (10)
1. a kind of fingerprint recognition display device, it is characterised in that include：Display floater, be arranged at the display floater go out light
Light guide plate on face, the modulation light for making to send adopt complete between the display surface of the light guide plate to the display device
The luminous component of reflection mode transmission, and the multiple light-inductive lists being arranged in array being arranged at below the light guide plate
Unit.
2. fingerprint recognition display device as claimed in claim 1, it is characterised in that the light-inductive unit is specifically included：
For sensing the light sensitive diode of the modulation light of reflection at fingerprint median ridge, and light will be modulated for controlling the light sensitive diode
Be converted to the controlling switch transistor of current potential output；
The fingerprint recognition display device, also includes：For to the corresponding controlling switch transistor load identification scanning letter
Number identification scan line, and for by the corresponding controlling switch transistor to the light sensitive diode loading negative sense it is inclined
Press or read the identification output lead of the output signal of telecommunication of the light sensitive diode；Wherein,
It is each it is described identification scan line corresponds with light-inductive unit described in each row, it is each it is described recognize output lead with described in each row
Light-inductive unit is corresponded；Or, each identification scan line is corresponded with each row light-inductive unit, it is each described
Identification output lead is corresponded with light-inductive unit described in each row.
3. fingerprint recognition display device as claimed in claim 2, it is characterised in that each light-inductive unit, each described
Identification scan line and each identification scan line are arranged in the institute of the black matrix in display floater overlay area.
4. fingerprint recognition display device as claimed in claim 2, it is characterised in that each light-inductive unit, each described
Identification scan line and each identification scan line are arranged on the surface of close described display floater of the light guide plate；Or arrange
Inside the display floater.
5. fingerprint recognition display device as claimed in claim 4, it is characterised in that also include：It is arranged at the light guide plate
The surface of the close display floater and the transparent reflection film layer between the light guide plate and each light-inductive unit；
Refractive index of the refractive index of the transparent reflection film layer less than the light guide plate.
6. fingerprint recognition display device as claimed in claim 5, it is characterised in that the material of the transparent reflection film layer is nothing
Machine material.
7. the fingerprint recognition display device as described in any one of claim 1-6, it is characterised in that the light guide plate is to be arranged at
Cover sheet on the display floater；The cover sheet has groove at the frame towards the display floater side
Structure, the luminous component are positioned in the groove structure.
8. the fingerprint recognition display device as described in any one of claim 1-6, it is characterised in that the light guide plate is arranged at institute
State between display floater and the cover sheet on the display floater；The luminous component is positioned over the light guide plate
At least two relative sides.
9. the fingerprint recognition display device as described in any one of claim 1-6, it is characterised in that the luminous component is to send
The OLED or LED light source of modulated infrared light or modulation visible ray.
10. fingerprint recognition display device as claimed in claim 9, it is characterised in that also include：It is arranged at the luminous component
On light-blocking member, light-blocking member orthographic projection on said display panel at least covers the just throwing of the luminous component
Shadow.
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| CN201620831904.3U CN206058222U (en) | 2016-08-02 | 2016-08-02 | A kind of fingerprint recognition display device |
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| CN201620831904.3U CN206058222U (en) | 2016-08-02 | 2016-08-02 | A kind of fingerprint recognition display device |
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| CN108399392B (en) * | 2018-03-07 | 2021-01-26 | 京东方科技集团股份有限公司 | Fingerprint identification structure and display device |
| CN109409269A (en) * | 2018-10-16 | 2019-03-01 | 维沃移动通信有限公司 | The control method of screen assembly, electronic equipment and screen assembly |
| CN113377242A (en) * | 2021-06-22 | 2021-09-10 | 武汉华星光电技术有限公司 | Display module |
| CN113377242B (en) * | 2021-06-22 | 2023-12-15 | 武汉华星光电技术有限公司 | Display module |
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