CN206058227U - A kind of fingerprint recognition module and fingerprint recognition display device - Google Patents
A kind of fingerprint recognition module and fingerprint recognition display device Download PDFInfo
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- CN206058227U CN206058227U CN201620852836.9U CN201620852836U CN206058227U CN 206058227 U CN206058227 U CN 206058227U CN 201620852836 U CN201620852836 U CN 201620852836U CN 206058227 U CN206058227 U CN 206058227U
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Abstract
The utility model discloses a kind of fingerprint recognition module and fingerprint recognition display device, the light shield layer being arranged on light-inductive unit in fingerprint recognition module includes：The first light shielding part being arranged above the light sensitive diode of light-inductive unit, and fixed potential holding wire；Wherein, the first light shielding part is electrical connected with one electrode tip of light sensitive diode of lower section, and each first light shielding part is connected with fixed potential holding wire.Top as fixed potential holding wire to be moved to light sensitive diode, and fixed potential holding wire is formed using light shield layer directly, the connecting hole for taking up room can be avoided arranging, maximize the occupied area of light sensitive diode, be conducive to increasing the photoelectric current that light sensitive diode is produced when fingerprint is detected, so as to improve the accuracy of detection of fingerprint.
Description
Technical field
This utility model is related to technical field of touch control, more particularly to a kind of fingerprint recognition module and fingerprint recognition show dress
Put.
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, the light sensitive characteristic of such as PIN junction can be utilized in a display device to realize the function of fingerprint recognition, and in order to
The normal display effect of display floater 1 is not affected, i.e., does not affect the aperture opening ratio of display floater 1, as shown in figure 1, typically will be photosensitive
Sensing unit 2 is arranged at and the corresponding position of gap location, i.e. light-inductive list between each light-emitting zone R, B and G in display floater 1
Unit 2 is arranged at the corresponding position of non-display area.Light-inductive unit 2 can receive the light that finger print reflects and produce
Photoelectric current, as the light intensity of valley and a ridge reflection is different, the photoelectric current of generation also can be different, so as to realize recognizing the paddy of fingerprint
With the function of ridge.
Specifically, as shown in Fig. 2 light-inductive unit 2 includes：For sensing the light for bringing light intensity to change when fingerprint is pressed
Quick diode 21, and light intensity change is converted to the controlling transistor of different electrical signals output for controlling light sensitive diode 21
22.Wherein, the drain electrode of controlling transistor 22 can be connected with an electrode tip of light sensitive diode 21, source electrode and read signal line phase
Even, grid is connected with scan signal line；When scan signal line loads scanning drive signal, controlling transistor 22 is on shape
State, read signal line are electrically connected with light sensitive diode 21, and read signal line loads reverse biased or by light to light sensitive diode 21
The signal of telecommunication on quick diode 21 is derived.In order to keep light sensitive diode 21 in reverse-biased, need to light sensitive diode 21
Another electrode tip loads fixed potential, therefore as shown in Fig. 2 another electrode tip of light sensitive diode 21 can be connected by light shielding part 23
Be connected to the fixed potential holding wire 24 arranged with layer with the grid of controlling transistor, also, in order to by the light shielding part 23 on upper strata with
The fixed potential holding wire 24 of bottom connects, and needs to arrange the connecting hole 25 through film layer between the two.Can from Fig. 2
Go out, the connecting hole 25 of setting can take larger space, so as to have influence on the area of light sensitive diode 21, also, be subject to photosensitive
The position limitation that sensing unit 2 is arranged, about with 20-26 μm or so between each light-emitting zone R, B and G in display floater 1
Distance, therefore, connecting hole 25 takes the area that excessive space can reduce light sensitive diode 21, causes light sensitive diode 21 in detection
The photoelectric current produced during fingerprint is less, and has influence on the accuracy of detection of fingerprint.
Utility model content
In view of this, this utility model embodiment provides a kind of fingerprint recognition module and fingerprint recognition display device, uses
To solve the problems, such as that light sensitive diode occupied area is affected by connecting hole in existing fingerprint recognition display device.
Therefore, this utility model embodiment provides a kind of fingerprint recognition module, including：Underlay substrate, is arranged on substrate
The multiple light-inductive units being arranged in array on substrate, the light shield layer being arranged on the light-inductive unit；Wherein,
The light-inductive unit includes：For sensing the light sensitive diode for bringing light intensity to change when fingerprint is pressed, and
Light intensity change is converted to the controlling transistor of different electrical signals output for controlling the light sensitive diode；
The light shield layer includes：The first light shielding part being arranged above the light sensitive diode, and fixed potential signal
Line；Wherein, first light shielding part is electrical connected with one electrode tip of the light sensitive diode of lower section, each first light shielding part
It is connected with the fixed potential holding wire, first light shielding part and the fixed potential holding wire are arranged with layer.
In a kind of possible implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided,
In the light-inductive unit, orthographic projection of the light sensitive diode on the underlay substrate is with the controlling transistor in institute
State the orthographic projection non-overlapping copies on underlay substrate.
In a kind of possible implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, institute
Controlling transistor is stated for bottom gate thin film transistor；The light shield layer also includes：Be arranged above the controlling transistor
Two light shielding parts.
In a kind of possible implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided,
First light shielding part and the second light shielding part above the same light-inductive unit is electrical connected.
In a kind of possible implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, institute
State controlling transistor to be arranged between the light sensitive diode and the underlay substrate, the drain electrode of the controlling transistor with it is described
Another electrode tip of light sensitive diode is connected.
In a kind of possible implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, also
Including：The multiple touch control detection units being arranged between the light-inductive unit and the underlay substrate.
On the other hand, this utility model embodiment additionally provides a kind of fingerprint recognition display device, including：Display floater,
And it is arranged at the above-mentioned fingerprint recognition module of the display floater exiting surface；Wherein, it is photosensitive in the fingerprint recognition module
Sensing unit is arranged at underlay substrate towards the surface of 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, the pattern of each light-inductive unit and light shield layer in fingerprint recognition module orthographic projection position on said display panel
Gap location between each sub-pix in 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：Multiple touch control detection units；The touch control detection unit is arranged at the substrate in the fingerprint recognition module
Between substrate and light-inductive unit, or, the touch control detection unit is arranged on 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, the underlay substrate in the fingerprint recognition module is cover sheet.
In a kind of possible implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
In, the display floater is electroluminescence display panel, and the underlay substrate in the fingerprint recognition module is encapsulation cover plate.
On the other hand, the manufacture method that this utility model embodiment additionally provides above-mentioned fingerprint recognition module, including：
The multiple light-inductive units being arranged in array are formed on underlay substrate；The light-inductive unit includes：With
When fingerprint pressing is sensed, bring light intensity to change light sensitive diode, and light intensity is changed for controlling the light sensitive diode
Be converted to the controlling transistor of different electrical signals output；
The figure of light shield layer is formed on the light-inductive unit；Wherein, the figure of the light shield layer includes：Arrange
The figure of the first light shielding part above the light sensitive diode, and the figure of fixed potential holding wire；Wherein, described first
Light shielding part is electrical connected with one electrode tip of the light sensitive diode of lower section, and each first light shielding part is believed with the fixed potential
Number line is connected, and the figure of first light shielding part and the fixed potential holding wire is made with layer.
In a kind of possible implementation, in the above-mentioned manufacture method that this utility model embodiment is provided, in same layer
When making the figure of first light shielding part and the fixed potential holding wire, also include：Make with layer and be arranged at the control
The figure of the second light shielding part above transistor.
The beneficial effect of this utility model embodiment includes：
A kind of fingerprint recognition module and fingerprint recognition display device that this utility model embodiment is provided, in fingerprint recognition mould
The light shield layer on light-inductive unit is arranged in group to be included：Be arranged above the light sensitive diode of light-inductive unit
One light shielding part, and fixed potential holding wire；Wherein, the electrical phase of one electrode tip of light sensitive diode of the first light shielding part and lower section
Even, each first light shielding part is connected with fixed potential holding wire.Top as fixed potential holding wire to be moved to light sensitive diode,
And fixed potential holding wire is formed using light shield layer directly, can avoid arranging the connecting hole for taking up room, make light sensitive diode
Occupied area maximize, be conducive to increasing light sensitive diode photoelectric current for producing when fingerprint is detected, so as to improve fingerprint
Accuracy of detection.
Description of the drawings
Fig. 1 is the structural representation of fingerprint identification display device in prior art；
Structural representations of the Fig. 2 for the light-inductive unit in fingerprint identification display device in prior art；
One of structural representation of fingerprint recognition module that Fig. 3 is provided for this utility model embodiment；
The structural representation of the light shield layer in the fingerprint recognition module that Fig. 4 is provided for this utility model embodiment；
The two of the structural representation of the fingerprint recognition module that Fig. 5 is provided for this utility model embodiment；
The structural representation of the touch control detection unit in the fingerprint recognition module that Fig. 6 is provided for this utility model embodiment；
Fig. 7 a and Fig. 7 b is respectively the structural representation of the fingerprint recognition display device that this utility model embodiment is provided.
Specific embodiment
Below in conjunction with the accompanying drawings, the fingerprint recognition module for this utility model embodiment being provided and fingerprint recognition display device
Specific embodiment is described in detail.
In accompanying drawing, the shapes and sizes of each part do not reflect the actual proportions of fingerprint recognition display floater, and purpose is simply illustrated
Illustrate this utility model content.
A kind of fingerprint recognition module that this utility model embodiment is provided, as shown in figure 3, including：Underlay substrate 100, if
The multiple light-inductive units 200 being arranged in array on underlay substrate 100 are put, is arranged on light-inductive unit 200
Light shield layer 300；Wherein, underlay substrate 100 is fingerprint contact surface A, i.e. finger away from the surface of 200 side of light-inductive unit
The surface of pressing；
Light-inductive unit 200 includes：For sensing the light sensitive diode 201 for bringing light intensity to change when fingerprint is pressed, with
And light intensity change is converted to the controlling transistor 202 of different electrical signals output for controlling light sensitive diode 200；
As shown in figure 4, light shield layer 300 includes：The first light shielding part 301, Yi Jigu being arranged above light sensitive diode 201
Determine electric potential signal line 302；Wherein, the first light shielding part 301 is electrical connected with 201 1 electrode tip of light sensitive diode of lower section, and each
One light shielding part 301 is connected with fixed potential holding wire 302, and the first light shielding part 301 and fixed potential holding wire 302 are arranged with layer.
In the above-mentioned fingerprint recognition module that this utility model embodiment is provided, as fixed potential holding wire 302 being moved
To the top of light sensitive diode 201, and fixed potential holding wire 302 is formed using light shield layer 300 directly, setting can be avoided to account for
With the connecting hole in space, maximize the occupied area of light sensitive diode 201, be conducive to increasing light sensitive diode 201 in detection
The photoelectric current produced during fingerprint, so as to improve the accuracy of detection of fingerprint.
It should be noted that in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, each first light shielding part
301 can have various with the connected mode of fixed potential holding wire 302, illustrated the first light shielding part of each column in Fig. 4
301 situations about being connected with a fixed potential holding wire 302, in the specific implementation, can also include other connections, here
Do not repeat.
In the specific implementation, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, as shown in figure 3, control
Transistor processed 202 is generally positioned between light sensitive diode 201 and underlay substrate 100, the drain electrode of controlling transistor 202 2021 with
Another electrode tip of light sensitive diode 201 is connected, and the source electrode 2022 of controlling transistor 202 typically can be with read signal line phase
When even, so as to the loading scanning drive signal of grid 2023 in controlling transistor 202, controlling transistor 202 is in the conduction state,
Another electrode tip conducting of read signal line and light sensitive diode 201 is made, reverse biased is loaded to light sensitive diode 201 or by light
The signal of telecommunication on quick diode 201 is derived.
In the specific implementation, controlling transistor will not be reflected onto in order to ensure the light for being irradiated to light sensitive diode 201
202 active layer, and the switch performance of controlling transistor 202 is affected, as shown in figure 3, provide in this utility model embodiment
In the light-inductive unit 200 of above-mentioned fingerprint recognition module, orthographic projection of the light sensitive diode 201 on underlay substrate 100 is general
Need and orthographic projection non-overlapping copies of the controlling transistor 202 on underlay substrate 100.
In the specific implementation, the controlling transistor 202 in the above-mentioned fingerprint recognition module that this utility model embodiment is provided
The grid of top gate type thin film transistor, i.e. thin film transistor (TFT) can be specifically adopted to be arranged at active layer, it would however also be possible to employ bottom
Gate type thin film transistor, as shown in figure 3, the active layer 2024 of i.e. thin film transistor (TFT) is arranged on grid 2023, here is not done
Limit.
When from top gate type thin film transistor, in order to ensure that extraneous light will not be irradiated to having for controlling transistor 202
Active layer, and the switch performance of controlling transistor 202 is affected, need to arrange in the bottom of top gate type thin film transistor and can block
The light shielding part of active layer.
When from bottom gate thin film transistor, will not be irradiated to ensure that from display panel side the display for sending is used up
The active layer 2024 of controlling transistor 202, and the switch performance of controlling transistor 202 is affected, need in bottom gate thin film crystal
The top of pipe arranges the light shielding part that can block active layer, now, is arranged on light-inductive unit 200 due to having existed
Light shield layer 300, therefore, as shown in figure 3, in the figure of the light shield layer 300, can also include：It is arranged at controlling transistor 202
Second light shielding part 302 of top, second light shielding part 302 at least covers the active layer 2024 of controlling transistor 202, with guarantee from
The switch performance for not interfering with controlling transistor 202 is used up in the display that display panel side sends.
Further, in the above-mentioned fingerprint recognition module that this utility model embodiment is provided, as shown in figure 3, can be with
The first light shielding part 301 and the second light shielding part 303 above the same light-inductive unit 200 is electrical connected so as to form one
Body structure, can so shield the complicated signal of telecommunication interference of display floater, provide a stable electrical environment for fingerprint detection, with
Improve the precision of fingerprint detection.
Further, in order that fingerprint recognition module can realize touch control detection function simultaneously, implement in this utility model
The above-mentioned fingerprint recognition module that example is provided, as shown in figure 5, can also include：It is arranged at light-inductive unit 200 and underlay substrate
Multiple touch control detection units 400 between 100.The touch control detection unit 400 is arranged at relative to light-inductive unit 200 and more connects
The side of nearly user, and the touch control detection unit 400 implements structure and can have various ways, for example, can select all
Such as (SLOC, the Single Layer on of the single layer pattern on glass with 401 pattern of touch detection electrodes as shown in Figure 6
Cell), it is also possible to which, from the mode of two-layer touch detection electrodes, here is not limited.
Conceived based on same utility model, this utility model embodiment additionally provides a kind of making side of fingerprint recognition module
Method, comprises the following steps：
The multiple light-inductive units being arranged in array are formed on underlay substrate；The light-inductive unit includes：For
Sensing fingerprint brings the light sensitive diode that light intensity changes when pressing, and is converted to light intensity change for controlling light sensitive diode
The controlling transistor of different electrical signals output；
The figure of light shield layer is formed on light-inductive unit；Wherein, the figure of light shield layer includes：It is arranged at photosensitive two
The figure of the first light shielding part above pole pipe, and the figure of fixed potential holding wire；Wherein, the light of the first light shielding part and lower section
One electrode tip of quick diode is electrical connected, and each first light shielding part is connected with fixed potential holding wire, and the first light shielding part is electric with fixed
The figure of position holding wire is made with layer.
Further, in the above-mentioned manufacture method that this utility model embodiment is provided, the first light shielding part is made in same layer
During with the figure of fixed potential holding wire, can also include：The second light shielding part being arranged above controlling transistor is made with layer
Figure.
Conceived based on same utility model, this utility model embodiment additionally provides a kind of fingerprint recognition display device, such as
Shown in Fig. 7 a and Fig. 7 b, including：Display floater 001, and it is arranged at this utility model embodiment of 001 exiting surface of display floater
There is provided above-mentioned fingerprint recognition module 002, the light-inductive unit in the fingerprint recognition module 002 be arranged at underlay substrate towards
The surface of the display floater, i.e. fingerprint contact surface A deviate from display floater 001.
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.
This utility model embodiment provide above-mentioned fingerprint recognition display device in, fingerprint recognition module 002 it is concrete
Structure may refer to it is described above, repeat part repeat no more.Moreover, it is noted that in fingerprint recognition display device
Can be by the multiple touch control detection units 400 for including as shown in Figure 7a, the underlay substrate being arranged in fingerprint recognition module 002
Between 100 and light-inductive unit 200；Touch control detection unit 400 can also be arranged at into display floater 001 as shown in Figure 7b
On, i.e., touch control detection unit 400 is produced in display floater 001.Also, the concrete structure of touch control detection unit 400 does not do
Limit, there can be various implementations.
Further, in order to not affect the aperture opening ratio of display floater 001, in the above-mentioned finger that this utility model embodiment is provided
In stricture of vagina identification display device, typically by the pattern of each light-inductive unit 200 and light shield layer 300 in fingerprint recognition module 002
Orthographic projection on display floater 001 is arranged at the gap location between each sub-pix in display floater 001, i.e., each light-inductive
The pattern of unit 200 and light shield layer 300 is arranged on non-luminous region.
Further, in the specific implementation, in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided
Display floater 001 can be specifically display panels, or electroluminescence display panel, can also be that other flat boards show
Show panel, here is not limited.
Also, the fingerprint in the above-mentioned fingerprint recognition display device that in the specific implementation, this utility model embodiment is provided
Identification module 002 in underlay substrate 100 be specifically as follows cover sheet, will fingerprint recognition module 002 be produced on protection cap
Inner surface of the plate towards display floater 001；It is of course also possible to be separately provided cover sheet, will fingerprint recognition module 002 it is direct
It is arranged between display floater 001 and cover sheet, here is not limited.
Additionally, when the display floater 001 in the above-mentioned fingerprint recognition display device that this utility model embodiment is provided is adopted
During electroluminescence display panel, the underlay substrate 100 in fingerprint recognition module 002 can also be multiplexed as encapsulation cover plate, will
Fingerprint recognition module 002 is produced on encapsulation cover plate towards the inner surface of display floater 001.
Above-mentioned fingerprint recognition module and fingerprint recognition display device that this utility model embodiment is provided, in fingerprint recognition mould
The light shield layer on light-inductive unit is arranged in group to be included：Be arranged above the light sensitive diode of light-inductive unit
One light shielding part, and fixed potential holding wire；Wherein, the electrical phase of one electrode tip of light sensitive diode of the first light shielding part and lower section
Even, each first light shielding part is connected with fixed potential holding wire.Top as fixed potential holding wire to be moved to light sensitive diode,
And fixed potential holding wire is formed using light shield layer directly, can avoid arranging the connecting hole for taking up room, make light sensitive diode
Occupied area maximize, be conducive to increasing light sensitive diode photoelectric current for producing when fingerprint is detected, so as to improve fingerprint
Accuracy of detection.
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 (11)
1. a kind of fingerprint recognition module, it is characterised in that include：Underlay substrate, be arranged on the underlay substrate in array
Multiple light-inductive units of arrangement, the light shield layer being arranged on the light-inductive unit；Wherein,
The light-inductive unit includes：For sensing the light sensitive diode for bringing light intensity to change when fingerprint is pressed, and it is used for
Control the controlling transistor that light intensity change is converted to the light sensitive diode different electrical signals output；
The light shield layer includes：The first light shielding part being arranged above the light sensitive diode, and fixed potential holding wire；Its
In, first light shielding part is electrical connected with one electrode tip of the light sensitive diode of lower section, each first light shielding part and institute
State fixed potential holding wire to be connected, first light shielding part and the fixed potential holding wire are arranged with layer.
2. fingerprint recognition module as claimed in claim 1, it is characterised in that in the light-inductive unit, described photosensitive
Orthographic projection of orthographic projection of the diode on the underlay substrate with the controlling transistor on the underlay substrate is not mutually weighed
It is folded.
3. fingerprint recognition module as claimed in claim 2, it is characterised in that the controlling transistor is bottom gate thin film crystal
Pipe；The light shield layer also includes：The second light shielding part being arranged above the controlling transistor.
4. fingerprint recognition module as claimed in claim 3, it is characterised in that the institute above the same light-inductive unit
State the first light shielding part and the second light shielding part is electrical connected.
5. fingerprint recognition module as claimed in claim 3, it is characterised in that the controlling transistor is arranged at described photosensitive two
Between pole pipe and the underlay substrate, the drain electrode of the controlling transistor is connected with another electrode tip of the light sensitive diode.
6. the fingerprint recognition module as described in any one of claim 1-5, it is characterised in that also include：It is arranged at described photosensitive
Multiple touch control detection units between sensing unit and the underlay substrate.
7. a kind of fingerprint recognition display device, it is characterised in that include：Display floater, and be arranged at the display floater and go out
The fingerprint recognition module as described in any one of claim 1-5 of bright finish；Wherein, the light-inductive in the fingerprint recognition module
Unit is arranged at underlay substrate towards the surface of the display floater.
8. fingerprint recognition display device as claimed in claim 7, it is characterised in that each photosensitive in the fingerprint recognition module
The orthographic projection on said display panel of the pattern of sensing unit and light shield layer be located at the display floater in each sub-pix it
Between gap location.
9. fingerprint recognition display device as claimed in claim 7, it is characterised in that also include：Multiple touch control detection units；Institute
State between the underlay substrate and light-inductive unit that touch control detection unit is arranged in the fingerprint recognition module, or, institute
State touch control detection unit to be arranged on the display floater.
10. the fingerprint recognition display device as described in any one of claim 7-9, it is characterised in that the fingerprint recognition module
In underlay substrate be cover sheet.
The 11. fingerprint recognition display devices as described in any one of claim 7-9, it is characterised in that the display floater is electricity
Photoluminescence display floater, the underlay substrate in the fingerprint recognition module are encapsulation cover plate.
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| CN201620852836.9U CN206058227U (en) | 2016-08-08 | 2016-08-08 | A kind of fingerprint recognition module and fingerprint recognition display device |
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| CN106326845A (en) * | 2016-08-15 | 2017-01-11 | 京东方科技集团股份有限公司 | Fingerprint recognition unit, manufacturing method, array substrate, display device, and fingerprint recognition method |
| CN107132947A (en) * | 2017-04-27 | 2017-09-05 | 北京小米移动软件有限公司 | A kind of terminal with fingerprint identification function |
| CN107480639A (en) * | 2017-08-16 | 2017-12-15 | 上海天马微电子有限公司 | A kind of touch-control display panel and display device |
| WO2018028303A1 (en) * | 2016-08-08 | 2018-02-15 | 京东方科技集团股份有限公司 | Fingerprint recognition module and manufacturing method therefor and display device |
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| CN111626195A (en) * | 2020-05-26 | 2020-09-04 | 京东方科技集团股份有限公司 | Display device, signal identification method thereof and lock body |
| US11804065B2 (en) | 2020-05-26 | 2023-10-31 | Beijing Boe Technology Development Co., Ltd. | Display apparatus and signal recognition method thereof, and visible light communication device |
| CN111626195B (en) * | 2020-05-26 | 2024-04-12 | 京东方科技集团股份有限公司 | Display device, signal identification method thereof and lock body |
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