CN105930827A - Array substrate, display device, and driving method for display device - Google Patents
Array substrate, display device, and driving method for display device Download PDFInfo
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- CN105930827A CN105930827A CN201610323594.9A CN201610323594A CN105930827A CN 105930827 A CN105930827 A CN 105930827A CN 201610323594 A CN201610323594 A CN 201610323594A CN 105930827 A CN105930827 A CN 105930827A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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Abstract
The embodiment of the invention provides an array substrate, a display device and a driving method for the display device, relates to the technical field of display, and can improve the fingerprint detection precision. The array substrate comprises a plurality of subpixels, and each subpixel comprises a display element. At least one subpixel forms one repetition unit, and one subpixel in the repetition unit also comprises a fingerprint recognition assembly, wherein the fingerprint recognition assembly comprises a fingerprint recognition element and a switching element. The switching element is controlled by a grid line to be started, so as to enable the fingerprint recognition unit to be connected with a reading signal line. The fingerprint recognition element is controlled by a first voltage end to collect fingerprint information, and is controlled by a transfer signal line to store the fingerprint information, so as to enable the fingerprint information to be transmitted to the reading signal line when the fingerprint recognition element is connected with the reading signal line. The display element is controlled by a grid line to be turned on or off, and a data signal is inputted to the display element through a data line when the display element is turned on. The array substrate is used for the display device with a function of fingerprint recognition.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of array base palte, display device and
Its driving method.
Background technology
Fingerprint is that human body is inherent, unique, immobilizes, can distinguish with other people
Identification feature, it the most important thing is paddy ridge patterned feature.Fingerprint identification technology have precision high,
Speed is fast, price is low, user's acceptance advantages of higher, has been widely used for personal identification and tests
Card field.
At present, how to realize fingerprint recognition in the viewing area of display device and be gradually concerned, as
Shown in Fig. 1, for having the display device of fingerprint identification function, wherein, fingerprint Identification sensor
It is integrated in the sub-pixel of display device.
Concrete, each fingerprint sensor is by a light sensitive diode L and a thin film transistor (TFT)
T forms, and the anode of light sensitive diode L connects Vcom voltage end, and negative electrode connects film crystal
First electrode of pipe T1, the grid of thin film transistor (TFT) T connects grid line GL, and the second electrode is even
Meet reading holding wire RL.Its operation principle is: when grid line GL opens, due to fingerprint valley
Difference between ridge, the meeting that the light that display device sends is irradiated on finger produces the anti-of varying strength
Penetrate so that arrive the light intensity at light sensitive diode L different, thus different photoelectric currents can be produced,
This photoelectric current is directly spread out of to reading holding wire RL by the thin film transistor (TFT) T of conducting.
Based on this, when grid line GL opens line by line, the fingerprint being connected with every a line grid line GL
The photoelectricity detected just can be streamed to read holding wire RL, by collecting every by sensor
Read the electric current that data wire RL reads, the identification to fingerprint valley ridge can be realized.
But, owing to prior art using exposure (process of light sensitive diode L generation electric current)
With the mode that carries out of reading simultaneously, i.e. grid line GL opens once, should complete to expose also complete
Become to read so that every time used by frame is longer, but during exposure is read for a long time
Probably there is trickle movement in finger, thus affects the accuracy of read fingerprint, and then
Affect accuracy of detection, cause detecting unsuccessfully.
Summary of the invention
Embodiments of the invention provide a kind of array base palte, display device and driving method thereof, can
Improve fingerprint detection precision.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, it is provided that a kind of array base palte, including multiple sub-pixels, at least one sub-picture
Element constitutes a repetitive, and one of them sub-pixel being positioned in repetitive also includes fingerprint
Recognizer component, described fingerprint recognition assembly includes fingerprint recognition element and switch element.
Concrete, described switch element connects grid line respectively, reads holding wire and the knowledge of described fingerprint
Other element, for opening under the control of described grid line, so that described fingerprint recognition element and institute
State reading holding wire conducting；Described fingerprint recognition element is also connected with the first voltage end and transfer signal
Line, for being acquired finger print information, and described under the control of described first voltage end
Store under the control of transfer signal line, with at described fingerprint recognition element and described reading holding wire
During conducting, described finger print information is spread out of to described reading holding wire.
Preferably, described fingerprint recognition element includes light sensitive diode, the first transistor and deposits
Storage electric capacity；The grid of described the first transistor connects described transfer signal line, and the first pole connects institute
Stating the negative electrode of light sensitive diode, the second pole connects described switch element；Described light sensitive diode
Anode connects described first voltage end；One end of described storage electric capacity connects described light sensitive diode
Anode, the other end connect described the first transistor the second pole.
It is further preferred that described switch element includes transistor seconds；Described transistor seconds
Grid connect described grid line, first pole connect described fingerprint recognition element, second pole connect institute
State reading holding wire.
It is further preferred that described transistor seconds and described the first transistor are low temperature polycrystalline silicon
Thin film transistor (TFT).
Concrete, the active layer of described transistor seconds includes the first heavily doped region and second heavily doped
Miscellaneous district；Described first heavily doped region electrically connects with described reading holding wire；Described the first transistor
Active layer include the 3rd heavily doped region and the 4th heavily doped region；Described 3rd heavily doped region and institute
State the second heavily doped region to share；Described light sensitive diode includes that p type semiconductor layer, intrinsic are partly led
Body layer and n type semiconductor layer；P type semiconductor layer or the N-type of described light sensitive diode are partly led
Body layer shares with described 4th heavily doped region.
Preferably, described each sub-pixel all includes that display element, described display element include
Three transistors, the 4th transistor and pixel electrode；The grid of described third transistor connects described
Grid line, the first pole connects described data wire, and the second pole connects the first pole of described 4th transistor；
The grid of described 4th transistor connects described grid line, and the second pole connects described pixel electrode.
It is further preferred that described third transistor and described 4th transistor are low temperature polycrystalline silicon
Thin film transistor (TFT)；The active layer of described third transistor includes that the 5th heavily doped region and sixfold are mixed
Miscellaneous district, described 5th heavily doped region electrically connects with described data wire；Having of described 4th transistor
Active layer includes septuple doped region and eightfold doped region, described eightfold doped region and described picture
Element electrode electrical connection；Wherein, described septuple doped region and described sixfold doped region share.
Based on above-mentioned, it is preferred that a repetitive is a pixel.
It is further preferred that a sub-pixel in described pixel cell is blue subpixels, institute
State fingerprint recognition assembly to be arranged in described blue subpixels.
Second aspect, it is provided that a kind of display device, including the array base palte of first aspect, also wraps
Include and read the signal receiving device that holding wire is connected；Described signal receiving device is used for receiving
The finger print information of described reading holding wire output.
The third aspect, it is provided that the driving method of a kind of display device, including the one of first aspect
Array base palte, each sub-pixel in array base palte all includes display element, display element and grid
Line and data wire connect, and driving method includes:
It is simultaneously entered signal at the reset phase of the first frame, all grid lines and transfer signal line, opens
Pass element is opened, and reads signal alignment fingerprint recognition element input reset voltage, and first
Under the control of voltage end, described fingerprint recognition element is reset；Meanwhile, data wire input
Black frame insertion signals.
In the display stage of the first frame, described grid line inputs scanning signal, described data wire line by line
Input data signal；Meanwhile, finger print information is acquired by described fingerprint recognition element.
In the transition phase of the second frame, described transfer signal line is simultaneously entered signal, to described finger
Stricture of vagina information stores.
In the display stage of the second frame, described grid line inputs scanning signal, described data wire line by line
Input data signal；Meanwhile, described finger print information is spread out of to described by described fingerprint recognition element
Read holding wire.
Circulate described first frame and described second frame.
Preferably, described fingerprint recognition element include light sensitive diode, the first transistor and
Storage electric capacity, in the case of described switch element includes transistor seconds；At described first frame
Reset phase, all grid lines and transfer signal line are simultaneously entered signal, and described switch element is opened,
Read signal alignment fingerprint recognition element input reset voltage, and in the control of the first voltage end
Under, described fingerprint recognition element is reset, including:
All grid lines and described transfer signal line are simultaneously entered signal, described the first transistor and institute
Stating transistor seconds to be both turned on, described reading holding wire inputs described reset voltage, wherein said
Reset voltage is more than the voltage of described first voltage end, so that described storage electric capacity resets,
And make the PN junction of described light sensitive diode reverse-biased.
On this basis, in the display stage of described first frame, described fingerprint recognition element is to finger
Stricture of vagina information, including: when there being finger contact screen, the moon of described light sensitive diode
Electrode potential reduces；In the transition phase of the second frame, described transfer signal line is simultaneously entered signal,
Described finger print information is stored, including: described transfer signal line is simultaneously entered signal, institute
Stating the first transistor conducting, the cathode potential of described light sensitive diode reduces the electric charge caused and reduces
Transfer on described storage electric capacity.
It is further preferred that described display element include third transistor, the 4th transistor and
In the case of pixel electrode, in the display stage of described second frame, described grid line inputs line by line and sweeps
Retouching signal, data wire input data signal, described fingerprint is believed by the most described fingerprint recognition element
Breath spreads out of to described reading holding wire, including:
Described grid line inputs scanning signal line by line so that be connected with current grid line is described trimorphism
Body pipe and described 4th transistor turns, and by described data alignment and the described 4th of conducting
The pixel electrode input data signal that transistor connects；Meanwhile, described in being connected with current grid line
Transistor seconds turns on, and the current potential of described storage electric capacity spreads out of to described reading holding wire.
The embodiment of the present invention provides a kind of array base palte, display device and driving method thereof, at grid
When line is opened, by data alignment display element input data signal, it is ensured that scheme normally
As display function.Meanwhile, under the control of the first voltage end, fingerprint recognition element can profit
The light sent with display element, is acquired finger print information；On this basis, at transfer letter
Under the control of number line, finger print information can be stored；Afterwards, again open when next frame grid line
Qi Shi, described finger print information just can spread out of to reading holding wire, thus realize the mesh of fingerprint recognition
's.In the process, exposure stage and the separation in the stage of reading can be realized.Wherein, by inciting somebody to action
Exposure stage separated with the stage of reading so that the exposure stage time gathering finger print information shortens,
Thus avoiding because time of exposure is oversize, finger is likely to occur trickle movement, and affects and read
The accuracy of finger print information, thus accuracy of detection can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that,
Accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain the attached of other according to these accompanying drawings
Figure.
A kind of equivalent electric of fingerprint recognition structure in the array base palte that Fig. 1 provides for prior art
Lu Tu；
The structural representation one of a kind of array base palte that Fig. 2 (a) provides for the embodiment of the present invention；
The structural representation two of a kind of array base palte that Fig. 2 (b) provides for the embodiment of the present invention；
The one etc. of fingerprint recognizer component in the array base palte that Fig. 3 provides for the embodiment of the present invention
Effect circuit diagram；
The schematic top plan view of a kind of array base palte that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 (a) be in Fig. 4 A-A to cross-sectional schematic；
Fig. 5 (b) be in Fig. 4 B-B to cross-sectional schematic；
Fig. 5 (c) be in Fig. 4 C-C to cross-sectional schematic；
Fig. 5 (d) be in Fig. 4 D-D to cross-sectional schematic；
Fig. 6 is a kind of equivalent circuit diagram of each element in Fig. 2 (b)；
The structural representation of a kind of display device that Fig. 7 provides for the embodiment of the present invention；
The driving method flow chart of a kind of display device that Fig. 8 provides for the embodiment of the present invention；
Fig. 9 is the sequential chart of signal during each element manipulation in Fig. 2 (b).
Reference
GL-grid line；TL-holding wire；RL-reads holding wire；DL-data wire；V1-the first electricity
Pressure side；Cst-stores electric capacity；T1-the first transistor；T2-transistor seconds；T3-the 3rd crystal
Pipe；T4-the 4th transistor；10-fingerprint recognition assembly；101-switch element；102-fingerprint is known
Other element；L-light sensitive diode；20-display element；01-the first heavily doped region；02-the second weight
Doped region；03-the 3rd heavily doped region；04-the 4th heavily doped region；05-the 5th heavily doped region；06-
Sixfold doped region；07-septuple doped region；08-eightfold doped region；110-channel region；
120-via；130-pixel electrode；F1-the first frame；F2-the second frame；T1-the first frame resets rank
Section；T2-the first frame display stage；T3-the second frame transfer stage；T4-the second frame display stage；
30-P type semiconductor layer；40-intrinsic semiconductor layer；50-N type semiconductor layer；200-signal connects
Receiving apparatus.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is entered
Row clearly and completely describes, it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into present invention protection
Scope.
The embodiment of the present invention provides a kind of array base palte, as shown in Fig. 2 (a) and 2 (b), including many
Individual sub-pixel, at least one sub-pixel constitutes a repetitive (dotted line frame in Fig. 2), position
One of them sub-pixel in repetitive includes fingerprint recognition assembly 10.Wherein, fingerprint
Recognizer component 10 includes fingerprint recognition element 102 and switch element 101.
Concrete, switch element 101 connects grid line GL respectively, reads holding wire RL and refer to
Stricture of vagina recognition component 102, for opening under the control of grid line GL, so that fingerprint recognition element
102 and reading holding wire RL turn on.
Herein, the switch element 101 the most often gone is connected with a grid line GL, opening of each column
Close element 101 to be connected with a reading holding wire RL.
Fingerprint recognition element 102 is also connected with the first voltage end V1 and transfer signal line TL, uses
Under the control at the first voltage end V1, finger print information is acquired, and at transfer signal line
Store under the control of TL, with at fingerprint recognition element 102 with when reading holding wire RL conducting,
Described finger print information is spread out of to reading holding wire RL.
Herein, the fingerprint recognition element 102 the most often gone is connected with a transfer signal line TL.
For the fingerprint recognition element 102 in often row, it is connected with the fingerprint recognition element 102 in this row
The first voltage end V1 preferably linked together by a control signal wire, this control signal
Line is for providing voltage signal for the first voltage end V1.So, cabling quantity can be reduced, carry
High aperture.
Certainly each sub-pixel in array base palte also includes display element 20, display element 20
Grid line GL and data wire DL can be connected respectively, under the control of grid line GL open or
Close this display element 20, and when opening by data wire DL input data signal.
Herein, the display element 20 the most often gone is connected with a grid line GL, and is positioned at same
The display element 20 of a line and switch element 101 connect same grid line GL.The display of each column
Element 20 is connected with data lines DL.
It should be noted that first, in embodiment of the present invention accompanying drawing, 2 (a) is with a sub-pixel structure
Illustrating as a example by becoming a repetitive, in accompanying drawing, 2 (b) is constituted a weight with three sub-pixels
Illustrate as a example by multiple unit, but the present invention is not limited to this, can arrive according to the crestal line of fingerprint
Distance between adjacent crestal line, the distance between the valley line of fingerprint to adjacent valley line and sub-pixel
Size, select the number of the sub-pixel that repetitive includes.
Wherein, finger print information is relevant with the valley line of fingerprint and crestal line.
Second, the array base palte of the embodiment of the present invention can be the array base palte of liquid crystal indicator,
The array base palte of organic electroluminescent diode display device can also be made.
The embodiment of the present invention provides a kind of array base palte, when grid line GL opens, passes through data
Line DL is to display element 20 input data signal, it is ensured that normal image display function.
Meanwhile, under the control of the first voltage end V1, fingerprint recognition element 102 is available aobvious
Show the light that element 20 sends, finger print information is acquired；On this basis, at transfer letter
Under the control of number line TL, finger print information can be stored；Afterwards, when next frame grid line
When GL is again turned on, described finger print information just can spread out of to reading holding wire RL, thus realizes
The purpose of fingerprint recognition.In the process, exposure stage and the separation in the stage of reading can be realized.
Wherein, by exposure stage was separated with the stage of reading so that gather the exposure rank of finger print information
The section time shortens, thus avoids because time of exposure is oversize, and finger is likely to occur trickle movement,
And affect the accuracy of read finger print information, thus accuracy of detection can be improved.
It is further preferred that as it is shown on figure 3, fingerprint recognition element 102 includes light sensitive diode
L, the first transistor T1 and storage electric capacity Cst.
Concrete, the grid of the first transistor T1 connects transfer signal line TL, and the first pole connects
The negative electrode of light sensitive diode L, the second pole connecting valve element 101；The sun of light sensitive diode L
Pole connects the first voltage end V1；One end of storage electric capacity Cst connects the sun of light sensitive diode L
Pole, the other end connects second pole of the first transistor T1.
Herein, the first voltage end V1 can be common electric voltage end Vom, it is also possible to be earth terminal.
It should be noted that this fingerprint recognition element 102 can also include multiple and first crystal
The transistor that pipe T1 is in parallel.Above-mentioned is only the illustration to fingerprint recognition element 102,
This is no longer going to repeat them for other structure identical with this fingerprint recognition element 102 function, but all
Protection scope of the present invention should be belonged to.
Additionally, the first pole, second pole of transistor are not limited by the present invention, first is the most permissible
Being drain electrode, second can be extremely source electrode；Or first can be extremely source electrode, and second can be extremely
Drain electrode.
It is further preferred that as it is shown on figure 3, switch element 101 includes transistor seconds T2.
Concrete, the grid of transistor seconds T2 connects grid line GL, and the first pole connects fingerprint
Second pole of the first transistor T1 in recognition component 102, the second pole connects reads holding wire RL.
It should be noted that this switch element 101 can also include multiple and transistor seconds
The transistor that T2 is in parallel.Above-mentioned is only illustration to switch element 101, other with
This is no longer going to repeat them for the identical structure of this switch element 101 function, but all should belong to this
The protection domain of invention.
In the embodiment of the present invention, with reference to shown in Fig. 3, fingerprint recognition element 102 carries out fingerprint knowledge
Other principle is: by being opened by grid line GL and transfer signal line TL simultaneously, and by reading
Take holding wire RL and apply the voltage higher than the first voltage end V1 to the negative electrode of light sensitive diode L,
The PN junction in light sensitive diode L is made to occur reverse-biased.On this basis, when grid line GL line by line
When opening, display element 20 is the most luminous, utilizes refraction and the principle of reflection of light, works as finger
During contact screen surface, the light that display element 20 sends is irradiated to valley line and the ridge of finger print
On line, owing to valley line and the angle that crestal line reflects and the light intensity that reflects back are different, by it
It is incident upon on light sensitive diode L the electric current produced the most different so that light sensitive diode L-cathode
Potential drop low degree different, and reflection light is the strongest, and the electric current of generation is the biggest, photosensitive two poles
The current potential of pipe L-cathode reduces the most.Further, when transfer signal line TL opens, light
The cathode potential of quick diode L reduces the electric charge minimizing caused and transfers to store on electric capacity Cst,
On this basis, when next frame grid line GL opens line by line, by reading holding wire RL just
Can read the voltage on storage electric capacity Cst, thus realize fingerprint valley and the purpose of crestal line identification.
Wherein, when finger contact screen, the crestal line of fingerprint is easier to and screen contact, irradiates
Light on finger fingerprint ridge line arrives the light on light sensitive diode L after being totally reflected
Intensity is relatively strong, and the light intensity on the valley line arrival light sensitive diode L of fingerprint is more weak.
The embodiment of the present invention, by opening line by line at former frame grid line GL, display element 20
During display, utilize refraction and the principle of reflection of light, make the valley line through finger print and crestal line reflection
The intensity of the light on light sensitive diode L is different, and makes the cathode potential of light sensitive diode L
Reduce difference.On this basis, transfer signal line TL opens, by the moon of light sensitive diode L
Electrode potential reduces the electric charge minimizing caused and transfers to store on electric capacity Cst, afterwards, works as next frame
When grid line GL opens line by line, just can read on storage electric capacity CST by reading holding wire RL
Voltage, thus realize exposure and read separation.
Preferably, as shown in Fig. 4, Fig. 5 (c), Fig. 5 (d), transistor seconds T2 and first is brilliant
Body pipe T1 is low-temperature polysilicon film transistor；The active layer of transistor seconds T2 includes
One heavily doped region 01 and the second heavily doped region 02；First heavily doped region 01 and reading holding wire
RL is electrically connected by via 120；The active layer of the first transistor T1 includes the 3rd heavily doped region
03 and the 4th heavily doped region 04；3rd heavily doped region 03 and the second heavily doped region 02 share；
Light sensitive diode L includes p type semiconductor layer 30, intrinsic semiconductor layer 40 and N-type semiconductor
Layer 50；The p type semiconductor layer 30 of light sensitive diode or n type semiconductor layer 50 and quadruple
Doped region 04 shares.
Wherein, the active layer of transistor seconds T2 also includes being positioned at the first heavily doped region 01 and
Channel region 110 between two heavily doped regions 02；Grid line GL may extend across transistor seconds T2's
Channel region 110, so that the grid of described grid line GL and transistor seconds T2 shares.
It is heavily doped that the active layer of the first transistor T1 also includes being positioned at the 3rd heavily doped region 03 and the 4th
Channel region 110 between miscellaneous district 04, transfer signal line TL may extend across the first transistor T1's
Channel region 110, so that the grid of described transfer signal line TL and the first transistor T1 shares.
Second heavily doped region 02 or the 3rd heavily doped region 03 can be with other electrodes such as public electrode shapes
Become storage electric capacity Cst (not identifying in Fig. 4 and Fig. 5).
It should be noted that transistor seconds T2 and the first transistor T1 can be N-type crystalline substance
Body pipe, it is also possible to be P-type transistor.If transistor seconds T2 and the first transistor T1 is N
Transistor npn npn, the then n type semiconductor layer 50 of light sensitive diode L and the 4th heavily doped region 04
Share, be sequentially overlapped intrinsic semiconductor layer 40 and p type semiconductor layer 30 above；If second is brilliant
Body pipe T2 and the first transistor T1 is P-type transistor, then the p-type of light sensitive diode is partly led
Body layer 30 and the 4th heavily doped region 04 share, and are sequentially overlapped intrinsic semiconductor layer 40 He above
N type semiconductor layer 50.Wherein, Fig. 5 (c) is with transistor seconds T2 and the first transistor T1
As a example by P-type transistor.
The embodiment of the present invention uses low temperature polycrystalline silicon manufacturing process, manufactures the first transistor simultaneously
PIN junction in the L of T1, transistor seconds T2 and light sensitive diode, can simplify manufacture work
Skill.
Preferably, with reference to shown in Fig. 4, display element 20 include third transistor T3, the 4th
Transistor T4 and pixel electrode 130.
Concrete, the grid of third transistor T3 connects grid line GL, and the first pole connects data
Line DL, the second pole connects first pole of described 4th transistor T4；The grid of the 4th transistor T4
Pole connects grid line GL, and the second pole connects pixel electrode 130.
It is further preferred that be low-temperature polysilicon at transistor seconds T2 and the first transistor T1
In the case of silicon thin film transistor, preferably third transistor T3 and the 4th transistor T4 is also
Low-temperature polysilicon film transistor.
Thus it is possible, on the one hand, the transistor in display element 20 can be with transistor seconds T2 and
One transistor T1 synchronizes to be formed, on the other hand, owing to low-temperature polysilicon film transistor has
Resolution is high, response speed is fast, brightness is high, aperture opening ratio is high, hence in so that this array base palte
Performance is more preferable.
It is on this basis, as shown in Fig. 4, Fig. 5 (a), Fig. 5 (b) and Fig. 6, concrete,
The active layer of third transistor T3 includes the 5th heavily doped region 05 and sixfold doped region 06,
5th heavily doped region 05 is electrically connected by via 120 with data wire DL；4th transistor T4
Active layer include septuple doped region 07 and eightfold doped region 08, eightfold doped region 08
Electrically connected by via 120 with pixel electrode 130；Septuple doped region 07 and sixfold are mixed
Miscellaneous district 06 shares.
Wherein, the active layer of third transistor T3 also includes being positioned at the 5th heavily doped region 05 and
Channel region 110 between sixfold doped region 06.The active layer of the 4th transistor T4 also includes position
Channel region 110 between septuple doped region 07 and eightfold doped region 08.Grid line GL
May extend across third transistor T3 and the channel region 110 of the 4th transistor T4, so that described grid line
GL shares with the grid of third transistor T3 and the 4th transistor T4.
It should be noted that for display element 20, common electrical further can also be included
Pole, public electrode and pixel electrode 130 form liquid crystal capacitance.Wherein, public electrode can set
Put and may also be arranged on array base palte on box substrate, do not limit at this.Public electrode with
Common electrical pressure side Vcom is connected.
Additionally, the display element 20 of the embodiment of the present invention, it is also possible to only include a transistor,
As long as the structure identical with this display element 20 function all should belong to protection scope of the present invention.
The embodiment of the present invention, on the one hand, by septuple doped region 07 and sixfold doped region 06
Share can Simplified flowsheet, on the other hand, by arrange in display element 20 two series connection
Transistor, can make leakage current less.
Based on above-mentioned, it is contemplated that in palmmprint, the spacing between crestal line and crestal line is more than 100 μm, paddy
Spacing between line and valley line is more than the spacing between crestal line and crestal line, and every in array base palte
The length of side general control of individual pixel is between 50-90 μm, it can be seen that the size of pixel is bright
Aobvious less than the spacing between palmmprint two-story valley and ridge.Based on this, the embodiment of the present invention is preferred, and one
Individual repetitive is a pixel, and the most as shown in Figure 6, three are arranged in order and different colours
Sub-pixel constitutes a pixel, is provided with a fingerprint recognition in a sub-pixel of each pixel
Assembly 10.
On this basis, it is contemplated that in red, green and blue light, blue light is by external environment
Impact minimum, therefore, in the embodiment of the present invention, it is preferred that as shown in Figure 6, fingerprint recognition
Assembly 10 is arranged in blue subpixels.
It should be noted that in the embodiment of the present invention, red sub-pixel, green sub-pixels and indigo plant
Sub-pixels is not necessarily to have red filter layer, green in the corresponding sub-pixel of array base palte
Filter layer, blue color filter layer, as long as this red sub-pixel bag in the display device ultimately formed
Including or corresponding red filter layer, green sub-pixels includes or corresponding green color filter, blue sub-picture
Element includes or corresponding blue color filter layer.That is: red filter layer may be located at array base palte
In sub-pixel, it is also possible to be positioned at color membrane substrates with this sub-pixel corresponding position.
As it is shown in fig. 7, the embodiment of the present invention also provides for a kind of display device, including above-mentioned battle array
Row substrate and the signal receiving device 200 being connected with reading holding wire RL, signal receives
Device 200 reads the finger print information of holding wire RL output for receiving.
Concrete, this signal receiving device 200 can be by reading holding wire, such as Fig. 7
In first reading holding wire RL1, second read holding wire RL2, with fingerprint recognition assembly
10 connect.When finger and screen contact, the light that display element 20 sends is irradiated to Fingers
The valley line of stricture of vagina and crestal line back reflection, on light sensitive diode L, make to produce on light sensitive diode L
Electric current, so that the cathode potential of light sensitive diode L reduces, owing to valley line and crestal line reflect
Angle and the light intensity that reflects back different, light sensitive diode L receives intensity of illumination and becomes
Changing, the electric current that light sensitive diode L produces is the most different so that light sensitive diode L-cathode
Potential drop low degree is different, by reading what light sensitive diode L current potential was reduced by holding wire RL
When information spreads out of to described signal receiving device 200, by related operation, signal receiving device
200 may determine that corresponding finger print information.
The embodiment of the present invention provide display device by by exposure stage and reading the stage separate,
The exposure stage time gathering finger print information is shortened, thus avoids because time of exposure is oversize,
Finger is likely to occur trickle movement, and affects the accuracy of read finger print information, thus can
Improve accuracy of detection.
The embodiment of the present invention additionally provides the driving method of a kind of display device, with reference to Fig. 2 (a),
Shown in Fig. 2 (b), the array base palte in described display device includes above-mentioned fingerprint recognition assembly
10, and each sub-pixel all includes display element 20, display element 20 and grid line GL and
Data wire DL connects.As shown in Figure 8, this driving method includes:
S10, at the reset phase of the first frame, all grid line GL and transfer signal line TL simultaneously
Input signal, switch element 101 is opened, and reads holding wire RL to fingerprint recognition element 102
Input reset voltage, and under the control of the first voltage end V1, to fingerprint recognition element 102
Reset；Meanwhile, data wire DL inputs black frame insertion signals.
Herein, when data wire DL inputs black frame insertion signals, display element 20 shows black picture.
S20, in the display stage of the first frame, grid line GL inputs scanning signal, data line by line
Line DL input data signal；Meanwhile, finger print information is acquired by fingerprint recognition element 102.
S30, in the transition phase of the second frame, transfer signal line TL is simultaneously entered signal, right
Finger print information stores.
S40, in the display stage of the second frame, grid line GL inputs scanning signal, data line by line
Line DL input data signal；Meanwhile, finger print information is spread out of to reading by fingerprint recognition element 102
Take holding wire RL.
S50, circulate the first frame and the second frame.
The embodiment of the present invention provides a kind of driving method, and the reset phase of the first frame is by whole display
Fingerprint recognition assembly 10 in panel is reset to initial conditions；The display stage of the first frame,
Under the control of the first voltage end V1, fingerprint recognition element 102 may utilize display element 20
The light gone out, is acquired finger print information；The transition phase of the second frame, at transfer signal line
Under the control of TL, finger print information can be stored；In the display stage of the second frame, work as grid line
When GL is again turned on, described finger print information just can spread out of to reading holding wire RL, thus realizes
The purpose of fingerprint recognition.In the process, exposure stage and the separation in the stage of reading can be realized.
Wherein, by exposure stage was separated with the stage of reading so that gather the exposure rank of finger print information
The section time shortens, thus avoids because time of exposure is oversize, and finger is likely to occur trickle movement,
And affect the accuracy of read finger print information, thus accuracy of detection can be improved.
Preferably, light sensitive diode L, the first transistor are included at fingerprint recognition element 102
T1 and storage electric capacity Cst；Switch element 101 includes transistor seconds T2；Display element
In the case of third transistor T3, the 4th transistor T4 and pixel electrode 130, reference
Sequential chart shown in Fig. 9, above-mentioned driving method specifically includes:
S100, at the reset phase t1 of the first frame F1, all grid line GL and transfer signal line
TL is simultaneously entered signal, the first transistor T1 and transistor seconds T2 and is both turned on, and reads letter
Number line RL inputs reset voltage, the wherein reset voltage voltage more than the first voltage end V1,
So that storage electric capacity Cst resets, and make the PN junction of light sensitive diode L reverse-biased；Meanwhile,
Data wire DL inputs black frame insertion signals.
Wherein, data wire DL input black frame insertion signals is equivalent to no-voltage, so that display element 20
Show black picture, owing to the persistent period of black picture is shorter, because of without being identified by the human eye,
Do not affect display.
S200, input scanning signal line by line at the display stage t2, grid line GL of the first frame F1,
Make third transistor T3 and the 4th transistor T4 conducting being connected with current grid line GL, and
By data wire DL input data signal；When there being finger contact screen, display element 20
The light sent is irradiated at the valley line of finger print and crestal line back reflection to light sensitive diode L,
Make to produce electric current on light sensitive diode L, so that the cathode drop of light sensitive diode L
Low.
Herein, owing to valley line and the angle that crestal line reflects and the light intensity that reflects back are different,
It is incident upon on light sensitive diode L the electric current produced the most different so that light sensitive diode L
The potential drop low degree of negative electrode is different, and reflection light is the strongest, and the electric current of generation is the biggest, photosensitive
The current potential of diode L-cathode reduces the most.
S300, in transition phase t3 of the second frame F2, transfer signal line TL is simultaneously entered letter
Number, the first transistor T1 conducting in fingerprint recognition element 102, by light sensitive diode L's
Cathode potential reduces the electric charge minimizing caused and transfers to store on electric capacity Cst.
S400, input scanning signal line by line at the display stage t4, grid line GL of the second frame F2,
Make third transistor T3 and the 4th transistor T4 conducting being connected with current grid line GL, and
By data wire DL input data signal；Meanwhile, second be connected with current grid line GL is brilliant
Body pipe T2 turns on, and the voltage on storage electric capacity Cst spreads out of to letter by reading holding wire RL
Number receive device 200, by related operation, signal receiving device 200 may determine that accordingly
Finger print information.
Based on above-mentioned, complete exposure stage in the first frame, complete the reading stage in the second frame,
By constantly circulation the first frame and the second frame, just fingerprint recognition can be reached while display
Purpose.The embodiment of the present invention provide driving method by by exposure stage and reading the stage separate,
The exposure stage time gathering finger print information is shortened, thus avoids because time of exposure is oversize,
Finger is likely to occur trickle movement, and affects the accuracy of read finger print information, thus can
Improve accuracy of detection.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
Being not limited to this, any those familiar with the art is at the technology model that the invention discloses
In enclosing, change can be readily occurred in or replace, all should contain within protection scope of the present invention.
Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (12)
1. an array base palte, including multiple sub-pixels, it is characterised in that at least one sub-picture
Element constitutes a repetitive, and one of them sub-pixel being positioned in repetitive also includes fingerprint
Recognizer component, described fingerprint recognition assembly includes fingerprint recognition element and switch element；
Described switch element connects grid line respectively, reads holding wire and described fingerprint recognition element,
Open under the control at described grid line, so that described fingerprint recognition element and described reading letter
The conducting of number line；
Described fingerprint recognition element is also connected with the first voltage end and transfer signal line, for described
Under the control of the first voltage end, finger print information is acquired, and in the control of described transfer signal line
The lower storage of system, with when described fingerprint recognition element and described reading holding wire turn on, by described
Finger print information spreads out of to described reading holding wire.
Array base palte the most according to claim 1, it is characterised in that described fingerprint recognition
Element includes light sensitive diode, the first transistor and storage electric capacity；
The grid of described the first transistor connects described transfer signal line, and the first pole connects described light
The negative electrode of quick diode, the second pole connects described switch element；
The anode of described light sensitive diode connects described first voltage end；
One end of described storage electric capacity connects the anode of described light sensitive diode, and the other end connects institute
State the second pole of the first transistor.
Array base palte the most according to claim 2, it is characterised in that described switch element
Including transistor seconds；
The grid of described transistor seconds connects described grid line, and the first pole connects described fingerprint recognition
Element, the second pole connects described reading holding wire.
Array base palte the most according to claim 3, it is characterised in that described second crystal
Pipe and described the first transistor are low-temperature polysilicon film transistor；
The active layer of described transistor seconds includes the first heavily doped region and the second heavily doped region；Institute
State the first heavily doped region to electrically connect with described reading holding wire；
The active layer of described the first transistor includes the 3rd heavily doped region and the 4th heavily doped region；Institute
State the 3rd heavily doped region and described second heavily doped region shares；
Described light sensitive diode includes p type semiconductor layer, intrinsic semiconductor layer and N-type semiconductor
Layer；The p type semiconductor layer of described light sensitive diode or n type semiconductor layer are 4th heavily doped with described
Miscellaneous district shares.
5. according to the array base palte described in claim 3 or 4, it is characterised in that described each
Sub-pixel all includes that display element, described display element include third transistor, the 4th transistor
And pixel electrode；
The grid of described third transistor connects described grid line, and the first pole connects described data wire,
Second pole connects the first pole of described 4th transistor；
The grid of described 4th transistor connects described grid line, and the second pole connects described pixel electrode.
Array base palte the most according to claim 5, it is characterised in that described 3rd crystal
Pipe and described 4th transistor are low-temperature polysilicon film transistor；
The active layer of described third transistor includes the 5th heavily doped region and sixfold doped region, institute
State the 5th heavily doped region to electrically connect with described data wire；
The active layer of described 4th transistor includes septuple doped region and eightfold doped region, institute
State eightfold doped region to electrically connect with described pixel electrode；Wherein, described septuple doped region and
Described sixfold doped region shares.
Array base palte the most according to claim 1 a, it is characterised in that repetitive
It it is a pixel.
Array base palte the most according to claim 7, it is characterised in that described pixel cell
In a sub-pixel be blue subpixels, described fingerprint recognition assembly is arranged at described blue son
In pixel.
9. a display device, it is characterised in that include described in any one of claim 1-8
Array base palte, also includes and reads the signal receiving device that holding wire is connected；
Described signal receiving device is for receiving the finger print information of described reading holding wire output.
10. the driving method of a display device, it is characterised in that include claim 1 institute
The array base palte stated, each sub-pixel in described array base palte all includes display element, described
Display element is connected with grid line and data wire；
Described driving method includes:
It is simultaneously entered signal at the reset phase of the first frame, all grid lines and transfer signal line, opens
Pass element is opened, and reads signal alignment fingerprint recognition element input reset voltage, and first
Under the control of voltage end, described fingerprint recognition element is reset；Meanwhile, data wire input
Black frame insertion signals；
In the display stage of the first frame, described grid line inputs scanning signal, described data wire line by line
Input data signal；Meanwhile, finger print information is acquired by described fingerprint recognition element；
In the transition phase of the second frame, described transfer signal line is simultaneously entered signal, to described finger
Stricture of vagina information stores；
In the display stage of the second frame, described grid line inputs scanning signal, described data wire line by line
Input data signal；Meanwhile, described finger print information is spread out of to described by described fingerprint recognition element
Read holding wire；
Circulate described first frame and described second frame.
11. driving methods according to claim 10, it is characterised in that described fingerprint is known
Other element includes light sensitive diode, the first transistor and storage electric capacity；Described switch element bag
Include transistor seconds；
It is simultaneously entered signal at the reset phase of described first frame, all grid lines and transfer signal line,
Described switch element is opened, and reads signal alignment fingerprint recognition element input reset voltage, and
Under the control of the first voltage end, described fingerprint recognition element is reset, including:
All grid lines and described transfer signal line are simultaneously entered signal, described the first transistor and institute
Stating transistor seconds to be both turned on, described reading holding wire inputs described reset voltage, wherein said
Reset voltage is more than the voltage of described first voltage end, so that described storage electric capacity resets,
And make the PN junction of described light sensitive diode reverse-biased；
In the display stage of described first frame, finger print information is adopted by described fingerprint recognition element
Collection, including:
When there being finger contact screen, the cathode potential of described light sensitive diode reduces；
In the transition phase of the second frame, described transfer signal line is simultaneously entered signal, to described finger
Stricture of vagina information stores, including:
Described transfer signal line is simultaneously entered signal, and described the first transistor turns on, described photosensitive
The cathode potential of diode reduces the electric charge minimizing caused and transfers on described storage electric capacity.
12. driving methods according to claim 11, it is characterised in that described display unit
Part includes third transistor, the 4th transistor and pixel electrode；
In the display stage of described second frame, described grid line inputs scanning signal, data wire line by line
Input data signal, described finger print information is spread out of to described reading by the most described fingerprint recognition element
Take holding wire, including:
Described grid line inputs scanning signal line by line so that be connected with current grid line is described trimorphism
Body pipe and described 4th transistor turns, and by described data alignment and the described 4th of conducting
The pixel electrode input data signal that transistor connects；Meanwhile, described in being connected with current grid line
Transistor seconds turns on, and the current potential of described storage electric capacity spreads out of to described reading holding wire.
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