CN106295527B - A kind of array substrate, display panel, display device and working method - Google Patents
A kind of array substrate, display panel, display device and working method Download PDFInfo
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- CN106295527B CN106295527B CN201610618889.9A CN201610618889A CN106295527B CN 106295527 B CN106295527 B CN 106295527B CN 201610618889 A CN201610618889 A CN 201610618889A CN 106295527 B CN106295527 B CN 106295527B
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- optical sensor
- sensor element
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- Nonlinear Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention provides a kind of array substrate, display panel, display device and working method.Wherein, array substrate includes: multiple subpixel regions on underlay substrate, each subpixel regions include the viewing area and non-display area to show picture, the non-display area is provided with optical sensor element, the optical signal received can be converted to electric signal by the optical sensor element, the non-display area is additionally provided with the opaque patterns between the optical sensor element and the underlay substrate, and orthographic projection of the optical sensor element on the underlay substrate is completely covered in the orthographic projection on the underlay substrate in the opaque patterns.The solution of the present invention realizes fingerprint identification function inside terminal screen, to improve user experience.
Description
Technical field
The present invention relates to display fields, more particularly to a kind of array substrate, display panel, display device and work side
Method.
Background technique
With the rapid development of mobile communication technology and intelligent terminal, fingerprint authentication technology uses crowd's range increasingly
Extensively, it has also become a part in our lives.Currently, people can pass through fingerprint authentication, Lai Shixian terminal unlocking, quick payment
Etc. very useful function.
However, current terminal device is all the hardware module that a fingerprint for identification is separately provided on mobile phone, show
So for convenience, which is normally at the outside of screen display area, does not only take up the sky of viewing area so
Between, also decline the entire mechanical strength of screen.
In view of this, will undoubtedly promote user experience, and change if fingerprint identification function can be realized on screen display area
Kind screen mechanical structure.
Summary of the invention
The object of the present invention is to provide a kind of on the inside of terminal screen realizes the technical solution of fingerprint recognition.
To achieve the above object, the present invention provides a kind of array substrate, including the multiple sub- pictures being formed on underlay substrate
Plain region, each subpixel regions include the viewing area and non-display area to show picture, and the non-display area is provided with light
Sensing element is learned, the optical signal received can be converted to electric signal by the optical sensor element, and the non-display area is also set
The opaque patterns being equipped between the optical sensor element and the underlay substrate, the opaque patterns are in the lining
Orthographic projection of the optical sensor element on the underlay substrate is completely covered in orthographic projection on substrate.
Optionally, the opaque patterns are the barrier metal layer figure and/or Source and drain metal level figure of the array substrate.
Optionally, the array substrate further include the public electrode being formed on underlay substrate and be located at each subpixel area
Thin film transistor (TFT) in domain, the optical sensor element be located at the thin film transistor (TFT) drain electrode and the public electrode it
Between, and the optical sensor element and the drain electrode and the common electrode contact are arranged.
Optionally, the optical sensor element is PN junction.
On the other hand, the present invention also provides a kind of display panels, including above-mentioned array substrate, and with the array substrate
To box setting to box substrate；
It is described to black matrix is provided on box substrate, the black matrix includes the optics sense exposed in the array substrate
Answer the opening of element.
Optionally, the display device further include:
Positioned at opaque patterns backwards to the anti-reflection structure of the underlay substrate side, the anti-reflection structure can be prevented
The non-display area emergent ray.
Optionally, the anti-reflection structure includes:
Positioned at the upper polarizer to box substrate light emission side；
Quarter-wave plate functional layer between the opaque patterns and the upper polarizer.
In addition, include above-mentioned display panel the present invention also provides a kind of display device, and by the first signal wire with
The touch chip of optical sensor element connection is reflected by user's finger through the black matrix in the emergent ray of the display device
Opening be irradiated on the optical sensor element after, the touch chip can carry out fingerprint knowledge based on the received electrical signal
Not.
Optionally, the display device is liquid crystal display device, and when the display panel includes anti-reflection structure, and this is anti-
Catoptric arrangement includes: the upper polarizer positioned at the display panel light emission side, and is located at opaque patterns and the upper polarization
When quarter-wave plate functional layer between piece, the display device further include:
Positioned at the transparent electrode of the non-display area；
The second signal line being connect with the transparent electrode；
Driving chip；
The driving chip can apply voltage to the transparent electrode by the second signal line, so that described non-aobvious
Show that the liquid crystal molecule in area deflects under the electric field that the public electrode of the transparent electrode and the display device is formed, makes institute
The transmission axis direction of the liquid crystal molecule optical axis direction and the upper polarizer of stating non-display area is at 45 ° to form the quarter-wave
Piece functional layer.
Optionally, the optical sensor element respectively with the drain electrode of the thin film transistor (TFT) of the display device and the display
The common electrode contact of device；
First signal wire is multiplexed with the data line of the display device, and the touch chip is multiplexed with the display dress
The source driving chip set.
In addition, the present invention also provides a kind of working methods of above-mentioned display device, comprising:
In the first time period of each display frame, number is inputted to data line by the source driving chip of the display device
According to voltage；
In the second time period of each display frame, received by the data line of the display device to the optical sensor member
The electric signal that part returns, and fingerprint recognition is carried out to the electric signal received by the touch chip.
Above scheme of the invention has the following beneficial effects:
The present invention can realize fingerprint identification function inside terminal screen, set in terminal enclosure compared with the prior art
Set the hardware of fingerprint recognition, the solution of the present invention will not occupied terminal display screen area, the machine of terminal enclosure will not be influenced
Tool intensity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of array substrate of the invention；
Fig. 2 is the detailed construction schematic diagram of array substrate of the invention；
Fig. 3 is the structural schematic diagram of display panel of the invention；
Fig. 4 is the structural schematic diagram of display device of the invention；
Fig. 5 is the perspective view of display device shown in Fig. 4.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Aiming at the problem that terminal device of the prior art needs to be arranged on the outside the hardware module of fingerprint identification function, this hair
Bright offer a solution.
On the one hand, the embodiment of the present invention provides a kind of array substrate, including the multiple sub- pictures being formed on underlay substrate
Plain region, as shown in Figure 1, each subpixel regions include viewing area and the non-display area to show picture；
Wherein, it is provided with optical sensor element 2 on non-display area, and is located at the optical sensor element 2 and underlay substrate 1
Between opaque patterns 3.The optical signal received can be converted to electric signal by optical sensor element 2, and opaque patterns 3
Orthographic projection of the optical sensor element 2 on underlay substrate 1 is completely covered in the orthographic projection on underlay substrate 1, to avoid coming from
The backlight of lower section is irradiated to optical sensor element.
Design based on the present embodiment, when user's finger 4 is pressed on the viewing area of screen, the light of viewing area, which irradiates, to be used
After the finger of family in meeting diffusing reflection to optical sensor element 2, optical sensor element 2 is set to generate corresponding electric signal, according to the telecommunications
It number can determine the fingerprint of user.
As it can be seen that compared with the prior art, the fingerprinting scheme of the present embodiment is realized in terminal screen, therefore will not shadow
Ring the layout structure of exterior of terminal.That is, the screen area of terminal will not be occupied, the mechanical strength of terminal enclosure will not be influenced.
It describes in detail below with reference to an implementation to the present embodiment array substrate.
It is the structural schematic diagram of the non-display area of array substrate in this implementation with reference to Fig. 2, Fig. 2, comprising:
Underlay substrate 21；
The grid 22 and public electrode cabling 23 being formed on underlay substrate；
Cover the first insulating layer 24 of grid 22 and public electrode cabling 23；
It is formed in source electrode 25 on the first insulating layer 24, drain electrode 26；
Form 26 top of drain electrode, and the PN junction 27 contacted with the drain electrode 26, the optical sensor element of the PN junction, that is, of the invention；
Cover the second insulating layer 28 of source electrode 25, drain electrode 26；
The public electrode 29 being formed in second insulating layer 28, the via hole point which passes through second insulating layer 28
It is not connect with PN junction 27 and public electrode cabling 23.
In the display stage, public electrode cabling 23 is that public electrode 29 loads common signal, when PN junction 27 receives user
After the reflected light of finger, corresponding electric signal can be generated, since public electrode 29 and drain electrode 26 form pressure difference, so that PN
The electric signal of knot 27 is transmitted on chip through source electrode 25 from data line by drain electrode 26, which can be further according to electric signal
User fingerprints are determined again.
From figure 2 it can be seen that the drain electrode 26 of the present embodiment is made of metal material, therefore can be used as of the invention above
The opaque patterns mentioned block the light source of lower section for PN junction 27.Certainly other feasible programs, the grid 22 of the present embodiment are used as
And/or public electrode cabling 23 also can be set below the projection of PN junction 27, as a part of opaque patterns, due to original
Identical no longer illustrate herein is managed to repeat.
Accordingly, another embodiment of the present invention also provides a kind of display panel, as shown in figure 3, including that the present invention is above-mentioned
Array substrate, and with the array substrate to box be arranged to box substrate；
Wherein, to black matrix 31 is provided on box substrate, which includes the optics sense exposed in array substrate
Answer the opening of element 2.
Obviously, in the display panel of the prior art, non-display area is blocked completely to the black matrix of box substrate, and it is of the invention
The improvement in structure is made for fingerprinting scheme, optics sense can be exposed by forming the black matrix 31 above non-display area
Answer the opening of element 2.When user's finger 4 is put on the screen, the light of screen can be reflected in 4 side of user's finger, and
By the opening of the black matrix 31, the optical sensor element 2 in array substrate is reached, so that optical sensor element 2 is converted into pair
The electric signal answered.
But since there are openings for the black matrix 31 to box substrate, in normal display, its possible opening
Metallic pattern (source electrode 25 in such as Fig. 2, drain electrode 26) so that there is bright spot in the region of display picture, is influenced there are reflective
To user experience.
To solve this problem, an antireflection can be arranged on the underlay substrate side in opaque patterns in the present invention
Structure, the anti-reflection structure can prevent the emergent ray of non-display area.
Below with reference to a feasible program, describe in detail to the anti-reflection structure of the present embodiment.
The present invention is provided with upper polarizer like the prior art, to the light emission side of box substrate；Unlike, the present invention exists
Quarter-wave plate functional layer is set between opaque patterns and upper polarizer；When the ambient lighting of user's finger reflection injects
Become linearly polarized light after polarizing film, polarization state is parallel with upper polarizer, and it is inclined to become circle after quarter-wave plate functional layer
Shake light, and reflects by opaque patterns.The light of opaque patterns reflection is still circularly polarized light, and only left-right rotary state is sent out
Changing.Later, the circularly polarized light of opaque patterns reflection again passes by quarter-wave plate functional layer and is converted to linearly polarized light,
Compared with state of its polarization state when incidence, 90 ° of deflections have occurred, can not be emitted by upper polarizer, play antireflection mesh
's.
Certainly, Yu Shangshu principle, in practical applications, the display panel of the present embodiment can be liquid crystal display panel, i.e.,
Array substrate and to being provided with layer of liquid crystal molecule between box substrate.Part in the display stage, immediately below black matrix aperture position
Liquid crystal molecule in layer of liquid crystal molecule can reach quarter-wave plate functional layer by deflection.
In addition, another embodiment of the present invention provides a kind of display device including above-mentioned display panel, the display surface is removed
Outside plate, display device further include:
The touch chip being connect by the first signal wire with optical sensor element, display device emergent ray by user
Finger reflects after the opening of the black matrix is irradiated on optical sensor element, and touch chip can be according to the telecommunications received
Number carry out fingerprint recognition.
Further, with reference to Fig. 4, in order to avoid the reflective phenomenon of 31 opening of black matrix, the display device of the present embodiment
Further include:
Positioned at the transparent electrode 41 of the non-display area, the transparent electrode 41 is dedicated for the corresponding liquid of driving non-display area
Brilliant molecule, can in the prior art for driving the pixel electrode 42 of the corresponding liquid crystal molecule in viewing area by with a composition work
Skill is formed；
The second signal line 44 being connect with transparent electrode 41；
Driving chip 45 can apply voltage to transparent electrode 41 by second signal line 44, so that the liquid of non-display area
Brilliant molecule deflects under the electric field that the public electrode of transparent electrode 41 and display device is formed, and makes the liquid crystal point of non-display area
The sub-light axis direction and transmission axis direction of upper polarizer is at 45 ° forms quarter-wave plate functional layer described above.
As exemplary introduction, in custom liquid crystals display device, when the liquid crystal molecule of non-display area is in 45 ° of deflection,
It is 45 ° that optical axis, which is formed by angle α with the axis of homology of upper polarizer,.
Based on above-mentioned design it is recognised that in the present embodiment display device, the liquid crystal molecule of viewing area and non-display area is only
It is vertical to be controlled.Ambient (being the light of user's finger reflection under normal circumstances) can enter to inject display from upper polaroid 32
In device, and reached on optical sensor element 2 by the opening of black matrix 31.But ambient is in optical sensor element 2 and not
After transparent figure 3 goes out reflection, it can not be but emitted from upper polaroid 32 by the opening of black matrix 31 again, so that interference be avoided to show
Area normally shows picture.
In addition, being directed to structure shown in Fig. 2, first signal wire of the present embodiment can be multiplexed with data line, the data line
It is connect with the source electrode 25 in Fig. 2, and touch chip is then multiplexed with the source driving chip of display device, existing display device,
Source driving chip is connect with data line, for loading data-signal.
The structure design of corresponding above-mentioned multiplexing scheme, the present invention also provides a kind of working method of above-mentioned display device, packets
It includes:
It is electric to data line input data by the source driving chip of display device in the first time period of each display frame
Pressure；
In the second time period of each display frame, received by the data line of display device to the return of optical sensor element
Electric signal, and fingerprint recognition is carried out to the electric signal received by touch chip.
It needs exist for just illustrating, within the first period, the grid load scanning letter of the thin film transistor (TFT) of display device
Number, therefore thin film transistor (TFT) is in the open state, the data-signal of data line is storage capacitance charging, thin in second time period
Film transistor is in close state, and pixel electrode is powered by storage capacitance, and the electric signal of optical sensor element can pass through at this time
The source electrode of thin film transistor (TFT) is passed to source driving chip, and source driving chip determines user fingerprints further according to electric signal.
Obviously, the design of the working method based on the present embodiment and display device of the invention, entire fingerprint recognition
Scheme be only be additionally provided on non-display area be located at drain electrode public electrode between contact PN junction, due to change compared with
It is small, therefore there is very high practical value.
In conclusion fingerprint identification function can be realized in inside screen in the display device of the present embodiment, therefore will not shadow
Ring the layout structure outside display device.That is, the screen area of display device will not be occupied, display device shell will not be influenced
Mechanical strength.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of array substrate, including the multiple subpixel regions being formed on underlay substrate, which is characterized in that each sub-pix
Region includes the viewing area and non-display area to show picture, and the non-display area is provided with optical sensor element, the light
The optical signal received can be converted to electric signal by learning sensing element, and the non-display area is additionally provided with positioned at the optics sense
The opaque patterns between element and the underlay substrate are answered, orthographic projection of the opaque patterns on the underlay substrate is complete
Orthographic projection of the optical sensor element on the underlay substrate described in all standing；
The array substrate further includes the public electrode being formed on underlay substrate and the film in each subpixel regions
Transistor, the optical sensor element is located between the drain electrode and the public electrode of the thin film transistor (TFT), and the light
It learns sensing element and the drain electrode and the common electrode contact is arranged.
2. array substrate according to claim 1, which is characterized in that the opaque patterns are the grid of the array substrate
Metal layer image and/or Source and drain metal level figure.
3. array substrate according to claim 1, which is characterized in that the optical sensor element is PN junction.
4. a kind of display panel, which is characterized in that including array substrate as claimed in any one of claims 1-3, further include
With the array substrate to box be arranged to box substrate；
It is described to black matrix is provided on box substrate, the black matrix includes the optical sensor member exposed in the array substrate
The opening of part.
5. display panel according to claim 4, which is characterized in that the display panel further include:
Positioned at opaque patterns backwards to the anti-reflection structure of the underlay substrate side, the anti-reflection structure can prevent described
Non-display area emergent ray.
6. display panel according to claim 5, which is characterized in that the anti-reflection structure includes:
Positioned at the upper polarizer to box substrate light emission side；
Quarter-wave plate functional layer between the opaque patterns and the upper polarizer.
7. a kind of display device, which is characterized in that including the described in any item display panels of claim 4-6, the display dress
It sets further include:
The touch chip being connect by the first signal wire with optical sensor element, the display device emergent ray by user
Finger reflects after the opening of the black matrix is irradiated on the optical sensor element, and the touch chip can be according to reception
The electric signal arrived carries out fingerprint recognition.
8. display device according to claim 7, which is characterized in that the display device is liquid crystal display device, works as institute
Stating display panel includes anti-reflection structure, and the anti-reflection structure include: positioned at the upper polarizer to box substrate light emission side,
And when quarter-wave plate functional layer between opaque patterns and the upper polarizer, the display device is also wrapped
It includes:
Positioned at the transparent electrode of the non-display area；
The second signal line being connect with the transparent electrode；
Driving chip；
The driving chip can apply voltage to the transparent electrode by the second signal line, so that the non-display area
Liquid crystal molecule deflect under the electric field that the public electrode of the transparent electrode and the display device is formed, make described non-
The liquid crystal molecule optical axis direction of viewing area and the transmission axis direction of the upper polarizer formation quarter-wave plate function at 45 °
Ergosphere.
9. display device according to claim 7, which is characterized in that the optical sensor element is filled with the display respectively
The drain electrode for the thin film transistor (TFT) set and the common electrode contact of the display device；
First signal wire is multiplexed with the data line of the display device, and the touch chip is multiplexed with the display device
Source driving chip.
10. a kind of working method of display device as claimed in claim 9, which is characterized in that the described method includes:
It is electric to data line input data by the source driving chip of the display device in the first time period of each display frame
Pressure；
In the second time period of each display frame, is received by the data line of the display device to the optical sensor element and returned
The electric signal returned, and fingerprint recognition is carried out to the electric signal received by the touch chip.
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| CN201610618889.9A CN106295527B (en) | 2016-07-29 | 2016-07-29 | A kind of array substrate, display panel, display device and working method |
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| CN201610618889.9A CN106295527B (en) | 2016-07-29 | 2016-07-29 | A kind of array substrate, display panel, display device and working method |
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| CN106815573B (en) * | 2017-01-06 | 2019-11-19 | 武汉华星光电技术有限公司 | Display screen and electronic device |
| CN106773219B (en) | 2017-02-07 | 2019-11-05 | 京东方科技集团股份有限公司 | A kind of display device |
| CN107247922B (en) * | 2017-05-12 | 2020-04-03 | Oppo广东移动通信有限公司 | Display device and mobile terminal |
| CN107368822B (en) * | 2017-08-18 | 2020-09-08 | 上海天马微电子有限公司 | Display device, manufacturing method thereof and electronic equipment |
| CN109426022A (en) * | 2017-08-31 | 2019-03-05 | 上海箩箕技术有限公司 | Display module |
| CN109696682A (en) * | 2017-10-23 | 2019-04-30 | 华为技术有限公司 | Optical sensing module and terminal device |
| CN108732834B (en) * | 2018-05-25 | 2021-06-18 | 上海中航光电子有限公司 | Display panel and display device |
| CN110557473B (en) * | 2018-05-31 | 2024-06-18 | 北京小米移动软件有限公司 | Display module and electronic equipment |
| TWI675245B (en) * | 2018-09-07 | 2019-10-21 | 友達光電股份有限公司 | Display panel |
| CN109359459B (en) * | 2018-10-26 | 2021-01-26 | 京东方科技集团股份有限公司 | Fingerprint identification method, fingerprint identification device and display module |
| CN109447046B (en) * | 2018-12-27 | 2021-07-23 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110045557B (en) * | 2019-03-22 | 2021-06-01 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN110412794B (en) * | 2019-08-01 | 2022-05-27 | 京东方科技集团股份有限公司 | Display substrate and display panel |
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| CN111095275B (en) * | 2019-08-29 | 2023-09-05 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, fingerprint identification method and electronic equipment |
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