CN110427874A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN110427874A CN110427874A CN201910703786.6A CN201910703786A CN110427874A CN 110427874 A CN110427874 A CN 110427874A CN 201910703786 A CN201910703786 A CN 201910703786A CN 110427874 A CN110427874 A CN 110427874A
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
-
- 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
Abstract
The invention discloses a kind of display panel and display devices, by the wherein at least one sub-pixel in each pixel unit, fingerprint recognition structure is set, and the fingerprint recognition structure includes MSM type photodetector and the control switch transistor that is electrically connected with MSM type photodetector, since MSM type photodetector and control switch transistor are arranged with the component in sub-pixel with film layer, therefore fingerprint recognition structure can be integrated with display panel, it does not need to increase additional semiconductor technology and forms the fingerprint recognition structure, the needs of full frame Design of Fingerprint Recognition may be implemented, to quickly be verified, promote user experience.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of display panel and display device.
Background technique
Fingerprint recognition mainly has three kinds of condenser type, optical profile type, ultrasonic type recognition methods.Wherein, capacitance type fingerprint be by
It is only limitted to fixed position when applied to full frame fingerprint recognition, can not effectively realize full frame location fingerprint identification；Ultrasonic type refers to
Structure is complicated for line identification, and technology is immature, and practicability is not high at present in the application of full frame fingerprint recognition；Optical finger print identification knot
Structure is simple, and exploitativeness is higher.
At least there are the following problems in the prior art: for traditional LCD display, utilizing the principles such as backlight and polaroid
It has been shown that, in order to avoid backlight leakage, non-displaypart is blocked by black matrix", is not able to satisfy the requirement of display screen light transmission,
Therefore fingerprint recognition under full frame screen relatively difficult to achieve.
Summary of the invention
The embodiment of the present invention provides a kind of display panel and display device, to realize it is a kind of have shield lower fingerprint recognition function
The liquid crystal display panel of energy.
Therefore, the embodiment of the invention provides a kind of display panel, including multiple pixel units, each pixel units
Including the different multiple sub-pixels of color, the wherein at least one sub-pixel in each pixel unit includes fingerprint recognition knot
Structure, the fingerprint recognition structure include that MSM type photodetector and the control being electrically connected with the MSM type photodetector are opened
Close transistor；
The MSM type photodetector and the control switch transistor are set with the component in the sub-pixel with film layer
It sets.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, including what is be stacked
Pixel electrode layer, gate metal layer, active layer, Source and drain metal level and common electrode layer；
The MSM type photodetector includes the first electrode being stacked, semiconductor layer and second electrode, described partly to lead
Body layer and the active layer are arranged with film layer, and the second electrode and the common electrode layer are arranged with film layer.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, the first electrode with
The gate metal layer is arranged with film layer or the first electrode is arranged with the pixel electrode layer with film layer.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, including it is located at described the
The first insulating layer between one electrode and the semiconductor layer, and between the semiconductor layer and the second electrode
Second insulating layer；
First insulating layer and the same film layer of gate insulating layer between the gate metal layer and the active layer
Setting, the second insulating layer and the passivation layer between the Source and drain metal level and the common electrode layer are set with film layer
It sets.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, each sub-pixel
The pixel switching transistor for including pixel electrode and being electrically connected with the pixel electrode；
It include the first grid line and the second grid line between sub-pixel described in every adjacent rows；Wherein, positioned at described in same a line
The grid of control switch transistor is electrically connected with the first grid line described in same, positioned at the pixel switching transistor of same a line
Grid be electrically connected with the second grid line described in same.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, per described in adjacent two column
It include a data line between sub-pixel, positioned at the control switch transistor and the pixel switching transistor of same row
Source electrode is electrically connected with data line described in same.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, per described in adjacent two column
It include two data lines between sub-pixel, positioned at the control switch transistor and the pixel switching transistor of same row
Source electrode is electrically connected from the different data lines.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, further include and described
The fingerprint recognition pressure-wire of one electrode electrical connection, the fingerprint recognition pressure-wire are located between sub-pixel described in adjacent rows.
Optionally, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, it is provided with the fingerprint
The sub-pixel for identifying structure is white sub-pixels.
Correspondingly, the embodiment of the invention also provides a kind of display devices, including above-mentioned provided in an embodiment of the present invention
Display panel described in one further includes the backlight module positioned at the display panel incident side.
Beneficial effects of the present invention:
Display panel provided in an embodiment of the present invention and display device pass through the wherein at least one in each pixel unit
Sub-pixel be arranged fingerprint recognition structure, and the fingerprint recognition structure include MSM type photodetector and with MSM type photodetection
The control switch transistor of device electrical connection, due to MSM type photodetector and control switch transistor with the portion in sub-pixel
Part is arranged with film layer, therefore fingerprint recognition structure can be integrated with display panel, does not need to increase additional semiconductor
Technique forms the fingerprint recognition structure, and the needs of full frame Design of Fingerprint Recognition may be implemented, to quickly be verified, is promoted
User experience.
Detailed description of the invention
Fig. 1 is the dot structure schematic diagram of display panel provided in an embodiment of the present invention；
Fig. 2 is one of the structural schematic diagram of the fingerprint recognition structure of display panel provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of each sub-pixel of display panel provided in an embodiment of the present invention；
Fig. 4 is the second structural representation of the fingerprint recognition structure of display panel provided in an embodiment of the present invention；
Fig. 5 is the overlooking structure diagram of display panel part provided in an embodiment of the present invention film layer；
Fig. 6 is the structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose of the present invention, the technical scheme and advantages are more clear, with reference to the accompanying drawing, to the embodiment of the present invention
The display panel of offer and the specific embodiment of display device are described in detail.
Each layer film thickness and shape do not reflect the actual proportions of display panel in attached drawing, and purpose is schematically illustrate hair
Bright content.
The embodiment of the invention provides a kind of display panels, and as shown in Figure 1, Figure 2 and shown in Fig. 5, Fig. 1 is the pixel of display panel
Structural plan schematic diagram, Fig. 2 are the schematic diagram of the section structure of fingerprint recognition structure, and Fig. 5 is bowing for the part film layer of display panel
Depending on structural schematic diagram, which includes multiple pixel units, and each pixel unit includes the different multiple sub-pixels of color
(such as red sub-pixel R, green sub-pixels G, blue subpixels B and white sub-pixels W), in each pixel unit wherein extremely
A few sub-pixel includes fingerprint recognition structure 100, and fingerprint recognition structure 100 includes MSM type photodetector 1 and and MSM
The control switch transistor T1 that type photodetector 1 is electrically connected；
MSM type photodetector 1 and control switch transistor T1 are arranged with the component in sub-pixel with film layer.
Display panel provided in an embodiment of the present invention and display device pass through the wherein at least one in each pixel unit
Sub-pixel be arranged fingerprint recognition structure, and the fingerprint recognition structure include MSM type photodetector and with MSM type photodetection
The control switch transistor of device electrical connection, due to MSM type photodetector and control switch transistor with the portion in sub-pixel
Part is arranged with film layer, therefore fingerprint recognition structure can be integrated with display panel, does not need to increase additional semiconductor
Technique forms the fingerprint recognition structure, and the needs of full frame Design of Fingerprint Recognition may be implemented, to quickly be verified, is promoted
User experience.
It should be noted that attached drawing provided in an embodiment of the present invention is merely to schematically illustrate the position of fingerprint recognition structure
It sets and film layer relationship.
Further, in the specific implementation, it in order to not influence the display brightness of display panel, is provided in the embodiment of the present invention
Above-mentioned display panel in, as shown in Figure 1, be provided with fingerprint recognition structure 100 sub-pixel be white sub-pixels W.Specifically,
The region of script setting white sub-pixels W is divided into two parts, region of a part as fingerprint recognition structure 100, a part
Region as white sub-pixels W.Fingerprint recognition structure 100 is set in white sub-pixels W, this is because display panel is every
One pixel unit will realize the light for emitting three kinds of colors of RGB of certain brightness, if wherein appointing in three sub-pixels of RGB
It anticipates one and fingerprint recognition structure is set, will affect the light emission luminance of three sub-pixels of RGB；And it is set in each pixel unit
Setting white sub-pixels W is the light emission luminance in order to improve three sub-pixels of RGB, therefore fingerprint is arranged in white sub-pixels W
It identifies structure, will not influence the light emission luminance of three sub-pixels of RGB；And the light transmittance of white sub-pixels W is higher, therefore
The precision of fingerprint recognition can be improved, improve user experience.Therefore the present invention is by being arranged fingerprint recognition in white sub-pixels W
Structure can realize fingerprinting scheme under a kind of higher screen of accuracy of identification on the basis of not influencing display panel brightness.
Further, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, as shown in figure 3, figure
3 be each film layer of each sub-pixel (such as R, G, B) interior pixel switching transistor and the schematic diagram of the section structure of pixel electrode 20, packet
Underlay substrate 10 is included, pixel electrode layer 20, gate metal layer 30, the active layer 40, source being stacked on underlay substrate 10
Leak metal layer 50 and common electrode layer 60；
As shown in Figure 2 and Figure 5, MSM type photodetector 1 includes the first electrode 11 being stacked, 12 and of semiconductor layer
Second electrode 13 (S in schematic diagram also represents the second electrode i.e. sense electrode of fingerprint recognition structure 100), semiconductor layer
12 are arranged with active layer 40 with film layer, in this way, it is only necessary to change original composition figure when forming active layer 40, can pass through
Patterning processes form the figure of semiconductor layer 12 and active layer 40, are increased without the technique that semiconductor layer 12 is prepared separately,
It can simplify preparation process flow, save production cost, improve production efficiency；Second electrode 13 and the same film layer of common electrode layer 60
Setting, in this way, it is only necessary to change original composition figure when forming common electrode layer 60, a patterning processes shape can be passed through
At the figure of second electrode 13 and common electrode layer 60, it is increased without the technique that second electrode 13 is prepared separately, can simplify system
Standby process flow, saves production cost, improves production efficiency.
Further, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, as shown in Fig. 2, the
One electrode 11 is arranged with gate metal layer 30 with film layer, or as shown in figure 4, first electrode 11 is set with pixel electrode layer 20 with film layer
It sets.Specifically, since the material of gate metal layer 30 is generally metal material, the material of pixel electrode layer 20 is generally ITO, gold
It is lower compared to the resistance of ITO material to belong to material, therefore present invention first electrode 11 preferably shown in Fig. 2 and gate metal layer 30 are same
Film layer setting.In this way, it is only necessary to change original composition figure when forming gate metal layer 30, a composition work can be passed through
Skill forms the figure of first electrode 11 and gate metal layer 30, is increased without the technique that first electrode 11 is prepared separately, Ke Yijian
Change preparation process flow, save production cost, improves production efficiency.In addition, due to the semiconductor layer of MSM type photodetector 1
12 for receiving the reflected light of finger, therefore first electrode 11 is arranged using the material of gate metal layer 30, can prevent
Interference of the light of 11 backside semiconductor layer of first electrode, 12 side to semiconductor layer 12, to further increase the essence of fingerprint recognition
Degree.Therefore display panel provided in an embodiment of the present invention is not only not required to by the way that fingerprint recognition structure is arranged in white sub-pixels
Increase semiconductor film layer process, do not influence the display brightness of display panel, and fingerprint recognition precision can be improved, improves
User experience.
Further, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, such as Fig. 2 and Fig. 4 institute
Show, including the first insulating layer 70 between first electrode 11 and semiconductor layer 12, and is located at semiconductor layer 12 and second
Second insulating layer 80 between electrode 13；
First insulating layer 70 and the gate insulating layer GI shown in Fig. 3 between gate metal layer 30 and active layer 40 are same
Film layer setting, second insulating layer 80 and the passivation layer 90 shown in Fig. 3 between Source and drain metal level 50 and common electrode layer 60
It is arranged with film layer.Specifically, due between first electrode 11 and semiconductor layer 12 have the first insulating layer 70, semiconductor layer 12 with
There is second insulating layer 80, in this way equivalent to increase the thickness between each film layer of MSM type photodetector 1 between second electrode 13
Degree, improves interface-potential, to improve potential barrier, on the one hand can reduce load, so that the power consumption of display panel is reduced, it is another
Aspect can reduce the dark-state leakage current of MSM type photodetector 1, further increase fingerprint recognition precision.
Further, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, as shown in Figure 1, often
One sub-pixel includes pixel electrode (corresponding to indicate pixel electrode with R, G, B) and is electrically connected with pixel electrode (R, G, B)
Pixel switching transistor T2；
It include the first grid line Gate1 and the second grid line Gate2 between every adjacent rows sub-pixel；Wherein, it is located at same a line
The grid of control switch transistor T1 be electrically connected with the first grid line of same Gate1, positioned at the pixel switch crystal of same a line
The grid of pipe T2 is electrically connected with the second grid line of same Gate2.
Further, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, as shown in figure 5, also
Including the fingerprint recognition pressure-wire HV being electrically connected with first electrode 11, fingerprint recognition pressure-wire HV be located at adjacent rows sub-pixel it
Between.
Further, in the specific implementation, in order to improve the aperture opening ratio of display panel, on provided in an embodiment of the present invention
It states in display panel, as shown in Figure 1, only including a data line Source between per adjacent two column sub-pixel, is located at same row
Control switch transistor T1 and the source electrode of pixel switching transistor T2 be electrically connected with same data line Source.I.e. fingerprint is known
Other structure 100 and white sub-pixels W share a data line Source, are conducive to improve aperture opening ratio, such fingerprint recognition stage
It is carried out with display stage timesharing, specifically, is carrying out fingerprint recognition stage (the Blanking stage of display), the first grid line
Gate1 inputs pixel cut-in voltage, and the second grid line Gate2 inputs pixel blanking voltage, and control switch transistor T1, which is in, to be opened
State, pixel switching transistor T2 are in close state, and data line Source passes through control switch transistor T1 to second electrode
13 input data voltages (the initial bias signal of fingerprint recognition) are referred to by fingerprint recognition pressure-wire HV to the input of first electrode 11
Line identifies voltage, to make MSM type photodetector 1 receive the reflected light of finger, according to the difference of reflected light, MSM type
Photodetector 1 judges finger print information to carry out fingerprint recognition；In the display stage, the first grid line Gate1 inputs pixel and cuts
Only voltage, the second grid line Gate2 input pixel cut-in voltage, and control switch transistor T1 is in close state, and pixel switch is brilliant
Body pipe T2 is in the open state, identical as the displaying principle of the relevant technologies, realizes the progressive scan of display panel to be shown.
Certainly, in the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, per adjacent two column sub-pixel
Between also may include two data lines, positioned at same row control switch transistor and pixel switching transistor source electrode with not
Same data line electrical connection.Fingerprint recognition stage and display stage can carry out simultaneously in this way, be independent of each other.
Specifically, above-mentioned display panel provided in an embodiment of the present invention is liquid crystal display (Liquid Crystal
Display, LCD) panel.It in the specific implementation, is this for other essential component parts of liquid crystal display panel
The those of ordinary skill in field should be understood that have, and this will not be repeated here, also should not be taken as limiting the invention.
Specifically, above-mentioned liquid crystal display panel provided in an embodiment of the present invention is with advanced super dimension field switch (Andvanced
Super Dimension Switch, ADS) be illustrated for type, naturally it is also possible to it is other modes.Specifically, ADS mould
The picture quality of liquid crystal display panel can be improved in formula, has high-resolution, high transmittance, low-power consumption, wide viewing angle, high opening
The advantages that rate, low aberration and ripple without water of compaction (push Mura), it has also become the mainstream skill of current high sharp display field
Art.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, as shown in fig. 6, including this hair
The above-mentioned display panel that bright embodiment provides further includes the backlight module 200 positioned at display panel incident side.The display device solution
Certainly the principle of problem is similar to aforementioned display panel, therefore the implementation of the display device may refer to the reality of aforementioned display panel
It applies, repeating place, details are not described herein.The display device can be with are as follows: display panel, mobile phone, tablet computer, television set, display
Any products or components having a display function such as device, laptop, Digital Frame, navigator.
Display panel provided in an embodiment of the present invention and display device pass through the wherein at least one in each pixel unit
Sub-pixel be arranged fingerprint recognition structure, and the fingerprint recognition structure include MSM type photodetector and with MSM type photodetection
The control switch transistor of device electrical connection, due to MSM type photodetector and control switch transistor with the portion in sub-pixel
Part is arranged with film layer, therefore fingerprint recognition structure can be integrated with display panel, does not need to increase additional semiconductor
Technique forms the fingerprint recognition structure, and the needs of full frame Design of Fingerprint Recognition may be implemented, to quickly be verified, is promoted
User experience.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of display panel, which is characterized in that including multiple pixel units, each pixel unit includes that color is different
Multiple sub-pixels, the wherein at least one sub-pixel in each pixel unit includes fingerprint recognition structure, and the fingerprint is known
Other structure includes MSM type photodetector and the control switch transistor that is electrically connected with the MSM type photodetector；
The MSM type photodetector and the control switch transistor are arranged with the component in the sub-pixel with film layer.
2. display panel as described in claim 1, which is characterized in that including pixel electrode layer, the gate metal being stacked
Layer, active layer, Source and drain metal level and common electrode layer；
The MSM type photodetector includes the first electrode being stacked, semiconductor layer and second electrode, the semiconductor layer
It is arranged with the active layer with film layer, the second electrode and the common electrode layer are arranged with film layer.
3. display panel as claimed in claim 2, which is characterized in that the first electrode and the same film layer of the gate metal layer
Setting or the first electrode and the pixel electrode layer are arranged with film layer.
4. display panel as claimed in claim 3, which is characterized in that including being located at the first electrode and the semiconductor layer
Between the first insulating layer, and the second insulating layer between the semiconductor layer and the second electrode；
First insulating layer and the gate insulating layer between the gate metal layer and the active layer are arranged with film layer,
The second insulating layer and the passivation layer between the Source and drain metal level and the common electrode layer are arranged with film layer.
5. display panel as described in claim 1, which is characterized in that each sub-pixel include pixel electrode and with
The pixel switching transistor of the pixel electrode electrical connection；
It include the first grid line and the second grid line between sub-pixel described in every adjacent rows；Wherein, positioned at the control of same a line
The grid of switching transistor is electrically connected with the first grid line described in same, positioned at the grid of the pixel switching transistor of same a line
Pole is electrically connected with the second grid line described in same.
6. display panel as claimed in claim 5, which is characterized in that arranging per adjacent two includes a number between the sub-pixel
According to line, positioned at data described in the control switch transistor of same row and the source electrode and same of the pixel switching transistor
Line electrical connection.
7. display panel as claimed in claim 5, which is characterized in that arranging per adjacent two includes two numbers between the sub-pixel
According to line, positioned at the control switch transistor of same row and source electrode and the different data of the pixel switching transistor
Line electrical connection.
8. display panel as claimed in claim 5, which is characterized in that further include that the fingerprint being electrically connected with the first electrode is known
Other pressure-wire, the fingerprint recognition pressure-wire are located between sub-pixel described in adjacent rows.
9. such as the described in any item display panels of claim 1-8, which is characterized in that be provided with the son of the fingerprint recognition structure
Pixel is white sub-pixels.
10. a kind of display device, which is characterized in that further include being located at including the described in any item display panels of claim 1-9
The backlight module of the display panel incident side.
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| CN201910703786.6A CN110427874B (en) | 2019-07-31 | 2019-07-31 | Display panel and display device |
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| CN201910703786.6A CN110427874B (en) | 2019-07-31 | 2019-07-31 | Display panel and display device |
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| CN110824328A (en) * | 2019-11-21 | 2020-02-21 | 京东方科技集团股份有限公司 | Photoelectric conversion circuit, driving method thereof and detection substrate |
| CN110824328B (en) * | 2019-11-21 | 2022-02-01 | 京东方科技集团股份有限公司 | Photoelectric conversion circuit, driving method thereof and detection substrate |
| CN111430441A (en) * | 2020-04-27 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | O L ED panel and fingerprint identification method thereof |
| CN111752030A (en) * | 2020-07-29 | 2020-10-09 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel and liquid crystal display device |
| WO2022022070A1 (en) * | 2020-07-29 | 2022-02-03 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel, and liquid crystal display device |
| CN111752030B (en) * | 2020-07-29 | 2023-09-19 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel and liquid crystal display device |
| US11953774B2 (en) | 2020-07-29 | 2024-04-09 | Beijing Boe Display Technology Co., Ltd. | Display substrate, liquid crystal display panel, and liquid crystal display device |
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