CN110955077B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110955077B CN110955077B CN201911405236.2A CN201911405236A CN110955077B CN 110955077 B CN110955077 B CN 110955077B CN 201911405236 A CN201911405236 A CN 201911405236A CN 110955077 B CN110955077 B CN 110955077B
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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
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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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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- 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
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Sustainable Development (AREA)
- Image Input (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses a display panel and a display device. The display panel comprises a display area and a frame area; the display area is provided with a plurality of sub-pixels and a plurality of fingerprint identification units, the frame area is provided with a display cascade scanning circuit and a fingerprint identification cascade scanning circuit, and the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas; the display area is provided with a plurality of display scanning lines, a plurality of fingerprint scanning lines and a plurality of fingerprint scanning lead-in wires, the display scanning lines and the fingerprint scanning lines extend along a first direction, the fingerprint scanning lead-in wires extend along a second direction, and the first direction and the second direction are intersected; the display cascade scanning circuit outputs display scanning signals to the sub-pixels through the display scanning lines; the fingerprint identification cascade scanning circuit outputs a fingerprint scanning signal to the fingerprint identification unit through the fingerprint scanning lead wire and the fingerprint scanning line. The technical scheme of the embodiment of the invention realizes the narrow frame design of the display panel with embedded fingerprint identification.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel and a display device.
Background
With the development of display technologies, high-screen-ratio, narrow-bezel displays are becoming more popular due to good user experience. The screen area ratio refers to the ratio of the screen area to the whole area, and the higher the screen area ratio is, the better the visual effect and the user experience are.
Fingerprints are inherent and unique biological features, and electronic devices with fingerprint identification functions are increasing. Taking a mobile phone as an example, fingerprint identification can be applied to various scenes such as unlocking, payment and the like. In order to improve the screen occupation ratio and have a fingerprint identification function, an optical fingerprint identification scheme embedded in the screen is receiving more and more attention. The existing optical fingerprint identification scheme generally needs at least two transistors and a photodiode fingerprint identification circuit to realize fingerprint identification, the grid of the transistor in the fingerprint identification circuit needs a driving signal to walk and a corresponding grid driving circuit to provide a signal, and the grid driving circuit is arranged to increase the width of a frame of the display panel, so that the design of the narrow frame is not facilitated.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for realizing the narrow frame design of the display panel with embedded fingerprint identification.
In a first aspect, an embodiment of the present invention provides a display panel, including a display area and a frame area surrounding the display area;
the display area is provided with a plurality of sub-pixels and a plurality of fingerprint identification units, the frame area is provided with a display cascade scanning circuit and a fingerprint identification cascade scanning circuit, and the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas;
the display area is provided with a plurality of display scanning lines, a plurality of fingerprint scanning lines and a plurality of fingerprint scanning lead-in wires, the display scanning lines and the fingerprint scanning lines extend along a first direction, the fingerprint scanning lead-in wires extend along a second direction, and the first direction is intersected with the second direction;
the display cascade scanning circuit is electrically connected with the sub-pixels through the display scanning lines, and outputs display scanning signals to the sub-pixels through the display scanning lines;
fingerprint scanning line with fingerprint identification scanning lead wire one-to-one electricity is connected, fingerprint identification cascades scanning circuit and passes through fingerprint identification scanning lead wire with the fingerprint scanning line with the fingerprint identification unit electricity is connected, fingerprint identification cascades scanning circuit and passes through fingerprint scanning lead wire with the fingerprint scanning line is to fingerprint identification unit output fingerprint scanning signal.
In a second aspect, an embodiment of the present invention further provides a display device, including any one of the display panels described above.
The display panel provided by the embodiment of the invention comprises a display area and a frame area surrounding the display area; the display area is provided with a plurality of sub-pixels and a plurality of fingerprint identification units, the sub-pixels are used for realizing image display, and the fingerprint identification units are used for realizing fingerprint identification on the touch main body; the display cascade scanning circuit outputs display scanning signals to the sub-pixels through the display scanning lines, the fingerprint identification cascade scanning circuit outputs fingerprint scanning signals to the fingerprint identification unit through the fingerprint scanning lead and the fingerprint scanning line, and the driving of the sub-pixels and the fingerprint identification unit is realized; the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas, so that the increase of the width of the frame area caused by the fact that the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in the same frame area can be avoided, the narrow frame design of the display panel is facilitated, and the screen occupation ratio of the display panel is improved.
Drawings
FIG. 1 is a schematic diagram of a display panel according to the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic view of a display panel according to another embodiment of the present invention;
FIG. 8 is a schematic diagram of a fingerprint identification unit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of another embodiment of a fingerprint identification unit;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a fingerprint identification unit according to another embodiment of the present invention;
FIG. 13 is a schematic diagram of a display panel according to another embodiment of the present invention;
fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 15 is a schematic view of a display panel according to another embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Currently, a fingerprint identification unit based on an optical principle is integrated inside a display panel, thereby being beneficial to realizing the full screen of the display panel. Fig. 1 is a schematic structural diagram of a display panel in the prior art. Referring to fig. 1, the display panel includes a display area 1 and a frame area 2, the display area 1 is provided with a plurality of pixel units (not shown in fig. 1), a part of the display area is a fingerprint identification area 11 including a plurality of fingerprint identification units (not shown in fig. 1), in order to drive the display unit to normally display, the left and right frame areas of the display panel are all provided with a display scanning circuit 21, in order to drive the fingerprint identification unit of the fingerprint identification area 11 to realize fingerprint identification, the left and right frame areas of the display panel are provided with a fingerprint identification scanning circuit 22 corresponding to the fingerprint identification area 11, the display panel frame area 2 is increased due to the arrangement of the fingerprint identification scanning circuit 22, and the trend of realizing a full-screen is not facilitated.
In view of this, an embodiment of the present invention provides a display panel, which includes a display area and a frame area surrounding the display area; the display area is provided with a plurality of sub-pixels and a plurality of fingerprint identification units, the frame area is provided with a display cascade scanning circuit and a fingerprint identification cascade scanning circuit, and the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas; the display area is provided with a plurality of display scanning lines, a plurality of fingerprint scanning lines and a plurality of fingerprint scanning lead-in wires, the display scanning lines and the fingerprint scanning lines extend along a first direction, the fingerprint scanning lead-in wires extend along a second direction, and the first direction and the second direction are intersected; the display cascade scanning circuit is electrically connected with the sub-pixels through display scanning lines, and outputs display scanning signals to the sub-pixels through the display scanning lines; fingerprint scanning line and fingerprint identification scanning lead wire one-to-one correspondence electricity are connected, and fingerprint identification cascades scanning circuit and passes through fingerprint identification scanning lead wire and fingerprint scanning line and be connected with the fingerprint identification unit electricity, and fingerprint identification cascades scanning circuit and passes through fingerprint scanning lead wire and fingerprint scanning line to fingerprint identification unit output fingerprint scanning signal.
According to the technical scheme of the embodiment of the invention, a plurality of sub-pixels and a plurality of fingerprint identification units are arranged in a display area, the sub-pixels are used for realizing image display, and the fingerprint identification units are used for realizing fingerprint identification on a touch main body; the display cascade scanning circuit outputs display scanning signals to the sub-pixels through the display scanning lines, the fingerprint identification cascade scanning circuit outputs fingerprint scanning signals to the fingerprint identification unit through the fingerprint scanning lead and the fingerprint scanning line, and the driving of the sub-pixels and the fingerprint identification unit is realized; the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas, so that the increase of the width of the frame area caused by the fact that the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in the same frame area can be avoided, the narrow frame design of the display panel is facilitated, and the screen occupation ratio of the display panel is improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. Based on the embodiments of the present invention, those skilled in the art can obtain all other embodiments without creative efforts, which belong to the protection scope of the embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 2, the display panel according to the embodiment of the present invention includes a display area 10 and a bezel area 20 surrounding the display area 10; the display area 20 is provided with a plurality of sub-pixels 210 and a plurality of fingerprint identification units 220, the frame area 20 is provided with a display cascade scanning circuit 230 and a fingerprint identification cascade scanning circuit 240, the display cascade scanning circuit 230 and the fingerprint identification cascade scanning circuit 240 are arranged in different frame areas (fig. 2 exemplarily shows that the display cascade scanning circuit 230 is arranged in a left frame area, and the fingerprint identification cascade scanning circuit 240 is arranged in an upper frame area); the display area 10 is provided with a plurality of display scan lines 110, a plurality of fingerprint scan lines 120 and a plurality of fingerprint scan lead lines 130, the display scan lines 110 and the fingerprint scan lines 120 extend along a first direction x, the fingerprint scan lead lines 130 extend along a second direction y, and the first direction x intersects with the second direction y; the display cascade scanning circuit 230 is electrically connected to the sub-pixels 210 through the display scanning lines 110, and the display cascade scanning circuit 230 outputs a display scanning signal to the sub-pixels 210 through the display scanning lines 110; fingerprint scanning line 120 is connected with fingerprint identification scanning lead wire 130 one-to-one correspondence electricity, and fingerprint identification cascades scanning circuit 240 and is connected with fingerprint identification unit 220 electricity through fingerprint identification scanning lead wire 130 and fingerprint scanning line 120, and fingerprint identification cascades scanning circuit 240 and passes through fingerprint scanning lead wire 130 and fingerprint scanning line 120 and export fingerprint scanning signal to fingerprint identification unit 220.
It can be understood that the display panel provided in the embodiment of the present invention may be a liquid crystal display panel, and may also be an organic light emitting display panel, the sub-pixel 210 may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and one red sub-pixel, one green sub-pixel, and one blue sub-pixel may form one pixel unit, so as to implement color image display. The fingerprint identification unit 220 may be disposed in a gap between pixel units, for example, between two sub-pixels 210, or may be integrated with the pixel units, which is not limited in the embodiment of the present invention. In a specific implementation, the display panel may be divided into a display stage and a fingerprint identification stage, in the display stage, the display cascade scanning circuit 230 outputs a display scanning signal to the sub-pixels 210 through the display scanning lines 110; in the fingerprint identification stage, the fingerprint identification cascade scanning circuit 240 outputs a fingerprint scanning signal to the fingerprint identification unit 220 through the fingerprint scanning lead 130 and the fingerprint scanning line 120, and the display stage and the fingerprint identification stage can be performed independently or simultaneously, and can be selected according to actual requirements during specific implementation.
It should be noted that fig. 2 shows that the fingerprint identification area provided with the fingerprint identification unit occupies 1/4 of the display area, which is only schematic, in other embodiments, the size of the fingerprint identification area may be designed according to actual requirements, for example, 1/2 of the display area, the entire display area, or only the area easily touched by a finger at the center position below the display area, and the position and size of the fingerprint identification area are not limited in the embodiments of the present invention.
On the basis of the above embodiment, optionally, the border area includes a first border and a third border that are arranged oppositely, and a second border and a fourth border that are arranged oppositely, the first border and the third border extend along the second direction, and the second border and the fourth border extend along the first direction; the display cascade scanning circuit is arranged on the first frame and/or the third frame; the fingerprint identification cascade scanning circuit is arranged on the second frame and/or the fourth frame.
Illustratively, with continued reference to fig. 2, the bezel area 20 includes a first bezel 20a, a second bezel 20b, a third bezel 20c, and a fourth bezel 20d, the first bezel 20a and the third bezel 20c extend along the second direction y, the second bezel 20b and the fourth bezel 20d extend along the first direction x, and the display cascade scan circuit 230 is disposed on the first bezel 20a; the fingerprint identification cascaded scanning circuit 240 is disposed on the second frame 20b.
It can be understood that fig. 2 schematically illustrates that the display panel has a rectangular structure, and the display cascade scanning circuit 230 and the fingerprint identification cascade scanning circuit 240 are respectively disposed on the left frame and the upper frame of the display panel, so as to avoid the increase of the width of the frame region caused by the display cascade scanning circuit 230 and the fingerprint identification cascade scanning circuit 240 being disposed on the same frame, which is beneficial to the design of the narrow frame of the display panel. In one embodiment, the display cascade scanning circuit 230 may be disposed on the right frame, and the fingerprint identification cascade scanning circuit 240 may be disposed on the lower frame, or the positions of the display cascade scanning circuit 230 and the fingerprint identification cascade scanning circuit 240 may be interchanged.
Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 3, alternatively, the display cascade scan circuit 230 includes a first display cascade scan circuit 231 and a second display cascade scan circuit 232; the first display cascade scanning circuit 231 is disposed in the first frame 20a, and the second display cascade scanning circuit 232 is disposed in the third frame 20c.
It can be understood that, in the embodiment in fig. 3, the first display cascade scanning circuit 231 is disposed on the left frame of the display panel, and the second display cascade scanning circuit 232 is disposed on the right frame of the display panel, so that the widths of the left frame and the right frame are symmetrical, which is beneficial to circuit design and routing arrangement.
Optionally, the first display cascade scanning circuit is electrically connected to the odd-numbered line display scanning lines; the second display cascade scanning circuit is electrically connected with the even-numbered display scanning lines; or the first display cascade scanning circuit and the second display cascade scanning circuit are electrically connected with all the display scanning lines.
Illustratively, with continued reference to fig. 3, the first display cascade scanning circuit 231 is electrically connected to the odd-numbered row display scanning lines; the second display cascade scanning circuit 232 is electrically connected to the even-numbered display scanning lines. The arrangement can realize the cross drive of the display panel and reduce the load of the display cascade scanning circuit.
Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 4, the first display cascade scanning circuit 231 and the second display cascade scanning circuit 232 are electrically connected to all the display scanning lines. The bilateral drive of the display panel can be realized by the arrangement, and the stability of the display picture of the display panel is improved.
It will be appreciated that for simplicity, the sub-pixels and fingerprint identification unit have been omitted from fig. 3 and 4, and the following embodiments are similar. It should be noted that the fingerprint identification cascaded scanning circuit 240 in fig. 3 and 4 is only schematically disposed on the upper frame 20b, and in other embodiments, the fingerprint identification cascaded scanning circuit 240 may be disposed on the lower frame 20d, or at least a part of the fingerprint identification cascaded scanning circuit 240 may be disposed on both the upper frame 20b and the lower frame 20 d. For example, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 5, the fingerprinting cascading scan circuit 240 includes fingerprinting cascading scan circuits 240a and 240b disposed on the upper rim 20b and the lower rim 20d, respectively.
It should be noted that the frame region 20 of the display panel shown in fig. 2 to 5 includes four frames, which is only schematic, and the following embodiment also exemplifies that the display panel includes four frames. In other embodiments, the display panel may further include more frames, for example, six frames, eight frames, or other manners, which is not limited in the embodiment of the present invention.
Optionally, the second frame or the fourth frame includes a step area, and the step area is provided with a plurality of bonding terminals; the fingerprint identification cascade scanning circuit and the step area are positioned in the frame area at two sides of the display area.
For example, fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 6, the fourth frame 20d includes a step area 30, the step area 30 is provided with a plurality of bonding terminals 31, and accordingly, the fingerprint identification cascade scanning circuit 240 is disposed on the second frame 20b. The step area 30 includes a fan-out area (not shown in fig. 6) for gathering a plurality of traces, a bonding terminal 31 is disposed at one end of the fan-out area, and the bonding terminal 31 is used for bonding an integrated circuit chip (IC) in the step area or connecting a Flexible Printed Circuit (FPC) bonded with the IC. In other embodiments, a step area may be disposed on the second border, and a fingerprint identification cascaded scanning circuit may be disposed on the fourth border, which may be selected according to actual situations in specific implementation, and this is not limited in the embodiments of the present invention. The narrow frame design of the display panel is facilitated by arranging the fingerprint identification cascade scanning circuit and the frame areas, which are positioned on two sides of the display area, in the step areas.
Optionally, the fingerprint identification cascade scanning circuit includes a first fingerprint identification cascade scanning circuit, and the first fingerprint identification cascade scanning circuit is disposed on the second frame or the fourth frame; the fingerprint identification unit comprises a fingerprint identification element and a fingerprint identification circuit electrically connected with the fingerprint identification element, and the fingerprint identification circuit comprises a selection output end; the fingerprint identification scanning lead comprises a plurality of fingerprint scanning lines, a plurality of fingerprint identification scanning leads and a plurality of output control scanning leads, wherein the output control scanning leads are electrically connected with the output control scanning lines in a one-to-one correspondence manner; the first fingerprint identification cascade scanning circuit is electrically connected with the output control scanning lead wires, the output control scanning lines are electrically connected with the selection output end of the fingerprint identification circuit, and the first fingerprint identification cascade scanning circuit is used for outputting fingerprint identification output control signals to the selection output end of the fingerprint identification circuit.
For example, fig. 7 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 7, the fingerprint identification cascaded scan circuit 240 includes a first fingerprint identification cascaded scan circuit 241, the first fingerprint identification cascaded scan circuit 241 is disposed on the second frame 20b; the fingerprint identification unit 220 comprises a fingerprint identification element 221 and a fingerprint identification circuit 222 electrically connected with the fingerprint identification element 221, wherein the fingerprint identification circuit 222 comprises a selection output end Sel; the fingerprint scanning line 120 comprises an output control scanning line 121, the fingerprint identification scanning lead 130 comprises an output control scanning lead 131, and the output control scanning lead 131 is electrically connected with the output control scanning line 121 correspondingly; the first fingerprint identification cascade scanning circuit 241 is electrically connected to the output control scanning lead 131, the output control scanning line 121 is electrically connected to the selection output Sel of the fingerprint identification circuit 222, and the first fingerprint identification cascade scanning circuit 222 is configured to output a fingerprint identification output control signal to the selection output Sel of the fingerprint identification circuit 222.
It is understood that only one fingerprint identification unit 220 and the corresponding output control scan line 121 and output control scan lead 131 are schematically shown in fig. 7 to clearly show the connection relationship thereof. The fingerprint identification unit 220 provided in this embodiment may be applied to a fingerprint identification circuit including two transistors and a capacitor (2T 1D), and fig. 8 is a schematic diagram of a fingerprint identification unit provided in an embodiment of the present invention. Referring to fig. 8, the fingerprint recognition unit includes a fingerprint recognition element 221 and a fingerprint recognition circuit 222 electrically connected to the fingerprint recognition element 221, the fingerprint recognition element 221 may be a photodiode D, the fingerprint recognition circuit 222 includes a first transistor T1, a second transistor T2 and a first capacitor C1, a positive electrode of the photodiode D and a first end of the first capacitor C1 are both connected to a bias voltage terminal Vbias, a negative electrode of the photodiode D and a second end of the first capacitor C1 are electrically connected to a control terminal of the first transistor T1, the first end of the first transistor T1 is electrically connected to a power voltage terminal VDD, the second end is electrically connected to a first terminal of the second transistor T2, the second terminal of the second transistor T2 is a fingerprint recognition output terminal OUT, and the control terminal of the second transistor T2 is a selection output terminal Sel, when fingerprint recognition is performed, sensing generated by the photodiode D changes a voltage of the control terminal of the first transistor T1, and the second transistor T2 is controlled to be turned on by the selection output photocurrent to output a fingerprint recognition signal. The fingerprint identification unit formed by the 2T1D has a simple structure and few circuit devices, is beneficial to simplifying the process and reducing the manufacturing cost of the display panel.
Optionally, the fingerprint identification cascaded scanning circuit further includes a second fingerprint identification cascaded scanning circuit, and the second fingerprint identification cascaded scanning circuit is disposed on the second frame or the fourth frame; the fingerprint identification circuit also comprises a reset control end; the fingerprint identification scanning lead wires are electrically connected with the fingerprint scanning lines in a one-to-one correspondence manner; the second fingerprint identification cascade scanning circuit is electrically connected with the plurality of reset control scanning leads, the reset control scanning lines are electrically connected with the reset control end of the fingerprint identification circuit, and the second fingerprint identification cascade scanning circuit is used for outputting a fingerprint identification reset control signal to the reset control end of the fingerprint identification circuit.
For example, fig. 9 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 9, the fingerprint identification cascade scanning circuit 240 further includes a second fingerprint identification cascade scanning circuit 242, and the second fingerprint identification cascade scanning circuit 242 is disposed on the second frame 20b; the fingerprint identification unit 220 comprises a fingerprint identification element 221 and a fingerprint identification circuit 222 electrically connected with the fingerprint identification element 221, wherein the fingerprint identification circuit 222 further comprises a reset control terminal Rst; the fingerprint scanning line 120 further includes a reset control scanning line 122, the fingerprint identification scanning lead 130 includes a reset control scanning lead 132, and the reset control scanning lead 132 is correspondingly electrically connected with the reset control scanning line 122; the second fingerprint identification cascade scanning circuit 242 is electrically connected to the reset control scanning lead 132, the reset control scanning line 122 is electrically connected to the reset control terminal Rst of the fingerprint identification circuit 222, and the second fingerprint identification cascade scanning circuit 242 is configured to output a fingerprint identification reset control signal to the reset control terminal Rst of the fingerprint identification circuit 222.
It is understood that only one fingerprint identification unit 220 and the corresponding reset control scan line 122 and reset control scan lead 132 are schematically shown in fig. 9 to clearly illustrate the connection relationship thereof. The fingerprint identification unit 220 provided in this embodiment may be applied to a fingerprint identification circuit including three transistors and a capacitor (3T 1D), and fig. 10 is a schematic diagram of another fingerprint identification unit provided in this embodiment of the present invention. Referring to fig. 10, the fingerprint recognition unit includes a fingerprint recognition element 221 and a fingerprint recognition circuit 222 electrically connected to the fingerprint recognition element 221, the fingerprint recognition element 221 may be a photodiode D, the fingerprint recognition circuit 222 includes a third transistor T3, a fourth transistor T4, a fifth transistor T5 and a second capacitor C2, a positive electrode of the photodiode D and a first end of the second capacitor C2 are both connected to a bias voltage terminal Vbias, a negative electrode of the photodiode D and a second end of the second capacitor C2 are electrically connected to a control terminal of the third transistor T3, a first end of the third transistor T3 is electrically connected to a power voltage terminal VDD, a second end is electrically connected to a first end of the fifth transistor T5, a second end of the fifth transistor T5 is a fingerprint recognition output terminal OUT, a control terminal of the fourth transistor T4 is a reset control terminal Rst, the first end is electrically connected to a power voltage terminal VDD, the second end is electrically connected to a negative electrode of the photodiode D, before fingerprint recognition is performed, a photocurrent of the node Q is reset control terminal of the photodiode D is changed by a sensing a change of the fingerprint recognition output terminal Sel, and the selection transistor T5 is turned on to select a photocurrent of the third transistor T3. The 3T1D fingerprint identification unit is beneficial to improving the fingerprint identification precision.
Optionally, the fingerprint identification cascaded scanning circuit further includes a third fingerprint identification cascaded scanning circuit, and the third fingerprint identification cascaded scanning circuit is disposed on the second frame or the fourth frame; the fingerprint identification circuit also comprises a gating control end; the fingerprint identification scanning system comprises a plurality of fingerprint scanning lines, a plurality of fingerprint identification scanning leads and a plurality of gating control scanning leads, wherein the fingerprint identification scanning leads comprise a plurality of gating control scanning leads; the third fingerprint identification cascade scanning circuit is electrically connected with the multiple gating control scanning lead wires, the gating control scanning lines are electrically connected with the gating control end of the fingerprint identification circuit, and the third fingerprint identification cascade scanning circuit is used for outputting gating control signals for fingerprint identification to the gating control end of the fingerprint identification circuit.
For example, fig. 11 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 11, the fingerprint identification cascaded scan circuit 240 further includes a third fingerprint identification cascaded scan circuit 243, and the third fingerprint identification cascaded scan circuit 243 is disposed on the second frame 20b; the fingerprint identification unit 220 comprises a fingerprint identification element 221 and a fingerprint identification circuit 222 electrically connected with the fingerprint identification element 221, wherein the fingerprint identification circuit 222 further comprises a gating control terminal Tx; the fingerprint scanning line 120 further comprises a gating control scanning line 123, the fingerprint identification scanning lead 130 comprises a gating control scanning lead 133, and the gating control scanning lead 133 is correspondingly and electrically connected with the gating control scanning line 123; the third fingerprint identification cascaded scanning circuit 243 is electrically connected to the gate control scanning lead 133, the gate control scanning line 123 is electrically connected to the gate control terminal Tx of the fingerprint identification circuit 222, and the third fingerprint identification cascaded scanning circuit 243 is configured to output a gate control signal for fingerprint identification to the gate control terminal Tx of the fingerprint identification circuit 222.
It is understood that only one fingerprint identification unit 220 and the corresponding gate control scan line 123 and gate control scan lead line 133 are schematically illustrated in fig. 11 to clearly show the connection relationship thereof. The fingerprint identification unit 220 provided in this embodiment may be applied to a fingerprint identification circuit including four transistors and a capacitor (4T 1D), and fig. 12 is a schematic diagram of a fingerprint identification unit according to another embodiment of the present invention. Referring to fig. 12, the fingerprint recognition unit includes a fingerprint recognition element 221 and a fingerprint recognition circuit 222 electrically connected to the fingerprint recognition element 221, the fingerprint recognition element 221 may be a photodiode D, the fingerprint recognition circuit 222 includes a sixth transistor T6, a seventh transistor T7, an eighth transistor T8, a ninth transistor T9 and a third capacitor C3, as can be seen from fig. 10 and 12, the 4T1D circuit adds the sixth transistor T6 between the cathode of the photodiode D and the third capacitor C3 compared to the 3T1D circuit, and the control terminal of the sixth transistor T6 is used as a gate control terminal Tx for selective conduction during the reset and read phases. The fingerprint identification unit of 4T1D is beneficial to improving the fingerprint identification precision.
It should be noted that, in the foregoing embodiment, it is only illustrative that the first fingerprint identification cascaded scanning circuit, the second fingerprint identification cascaded scanning circuit, and the third fingerprint identification cascaded scanning circuit are all disposed in the second frame, and in other embodiments, the first fingerprint identification cascaded scanning circuit, the second fingerprint identification cascaded scanning circuit, and the third fingerprint identification cascaded scanning circuit may also be disposed in the fourth frame, or may be partially disposed in the second frame, and partially disposed in the fourth frame, and may be set according to actual conditions in specific implementation.
Optionally, the display cascade scanning circuit includes a plurality of display driving shift registers, and the fingerprint identification cascade scanning circuit includes a plurality of fingerprint identification driving shift registers.
In this embodiment, the display driving shift register and the fingerprint identification shift register may adopt shift registers with the same structure, and output is controlled by different control signals, so as to implement display scanning and fingerprint identification scanning. By adopting the cascaded shift registers, the output end of the shift register of the previous stage is used as the input end of the shift register of the next stage, thereby effectively reducing the number of initial signal input ends and simplifying the circuit structure.
Fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 13, optionally, the display panel provided in this embodiment further includes a plurality of touch units 40 arranged in an array, each touch unit 40 is electrically connected to at least one touch signal line 41, and the touch signal line 41 extends along the second direction y; the fingerprint scanning lead 130 and the touch signal line 41 are disposed on the same layer.
By arranging the fingerprint scanning lead 130 and the touch signal line 41 on the same layer, the film structure of the display panel can be reduced, and the manufacturing process is simplified. In other embodiments, the fingerprint scanning lead layer may be separately disposed, and it is understood that the display scan lines and the fingerprint scan lines extend in the same direction, and are disposed in the same layer, and the fingerprint scanning lead layer is not disposed in the same layer as the fingerprint scan lines in general.
Optionally, with continuing reference to fig. 13, the display panel provided in this embodiment further includes a plurality of virtual touch signal lines 42, and at least a portion of the virtual touch signal lines 42 are multiplexed into the fingerprint scanning lead 130.
It can be understood that, since one touch unit 40 includes at least one touch electrode, and one touch electrode covers an area where a plurality of pixels are located, and the touch electrode is electrically connected to the touch signal line 41 through a via hole, in order to improve the display uniformity of the display panel, a plurality of virtual touch signal lines 42 that are not electrically connected to any touch electrode are also provided.
Fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 14, optionally, the present embodiment further includes a display driver chip 50 and a fingerprint identification driver chip 60; the display driving chip 50 is electrically connected to the input terminal of the display cascade scanning circuit 230; the fingerprint identification driving chip 60 is electrically connected to an input terminal of the fingerprint identification cascade scanning circuit 240.
It is understood that the display driver chip 50 and the fingerprint identification driver chip 60 are respectively used for providing an initial signal and a control signal to the display cascade scanning circuit 230 and the fingerprint identification cascade scanning circuit 240, and the fingerprint identification driver chip 60 is further connected to an output terminal of a fingerprint identification unit (not shown in fig. 14) for receiving a fingerprint identification signal.
It should be noted that the display driving chip 50 shown in fig. 14 is disposed at the lower end of the display panel, and the fingerprint identification chip is disposed at the upper end of the display panel, which is only illustrative, in other embodiments, the display driving chip 50 and the fingerprint identification driving chip 60 may be disposed at the same position of the display panel, and further, fig. 15 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. Referring to fig. 15, optionally, the display driver chip 50 and the fingerprint identification chip 60 are integrated in the same chip 70, which is beneficial to reducing the manufacturing cost of the display panel. The specific implementation can be designed according to the actual process conditions.
Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 16, the display device 100 includes any one of the display panels 200 according to the embodiments of the present invention. The display device 100 may be a mobile phone, a tablet computer, a smart wearable device, and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A display panel is characterized by comprising a display area and a frame area surrounding the display area;
the display area is provided with a plurality of sub-pixels and a plurality of fingerprint identification units, the frame area is provided with a display cascade scanning circuit and a fingerprint identification cascade scanning circuit, and the display cascade scanning circuit and the fingerprint identification cascade scanning circuit are arranged in different frame areas;
the display area is provided with a plurality of display scanning lines, a plurality of fingerprint scanning lines and a plurality of fingerprint scanning lead-in wires, the display scanning lines and the fingerprint scanning lines extend along a first direction, the fingerprint scanning lead-in wires extend along a second direction, and the first direction is intersected with the second direction;
the display cascade scanning circuit is electrically connected with the sub-pixels through the display scanning lines, and outputs display scanning signals to the sub-pixels through the display scanning lines;
the fingerprint scanning lines are electrically connected with the fingerprint identification scanning lead wires in a one-to-one corresponding manner, the fingerprint identification cascade scanning circuit is electrically connected with the fingerprint identification unit through the fingerprint identification scanning lead wires and the fingerprint scanning lines, and the fingerprint identification cascade scanning circuit outputs a fingerprint scanning signal to the fingerprint identification unit through the fingerprint scanning lead wires and the fingerprint scanning lines;
the display panel further comprises a plurality of touch units arranged in an array, each touch unit is electrically connected with at least one touch signal line, and the touch signal lines extend along the second direction;
the fingerprint scanning lead and the touch signal line are arranged on the same layer;
the display panel further comprises a plurality of virtual touch signal lines, and at least part of the virtual touch signal lines are multiplexed into the fingerprint scanning lead lines.
2. The display panel according to claim 1, wherein the bezel region comprises a first bezel and a third bezel that are disposed opposite to each other, and a second bezel and a fourth bezel that are disposed opposite to each other, the first bezel and the third bezel extending in the second direction, and the second bezel and the fourth bezel extending in the first direction;
the display cascade scanning circuit is arranged on the first frame and/or the third frame;
the fingerprint identification cascade scanning circuit is arranged on the second frame and/or the fourth frame.
3. The display panel according to claim 2, wherein the second bezel or the fourth bezel includes a stepped region provided with a plurality of bonding terminals;
the fingerprint identification cascade scanning circuit and the step area are located in the frame area on two sides of the display area.
4. The display panel according to claim 2, wherein the fingerprint identification cascade scan circuit comprises a first fingerprint identification cascade scan circuit, and the first fingerprint identification cascade scan circuit is disposed on the second bezel or the fourth bezel;
the fingerprint identification unit comprises a fingerprint identification element and a fingerprint identification circuit electrically connected with the fingerprint identification element, and the fingerprint identification circuit comprises a selection output end;
the fingerprint identification scanning lead wires are electrically connected with the output control scanning lines in a one-to-one correspondence manner;
first fingerprint identification cascades scanning circuit with many output control scanning lead wire electricity is connected, the output control scanning line with fingerprint identification circuit's selection output is connected, first fingerprint identification cascades scanning circuit is used for to fingerprint identification circuit's selection output control signal of output fingerprint identification.
5. The display panel according to claim 4, wherein the fingerprint identification cascade scan circuit further comprises a second fingerprint identification cascade scan circuit, and the second fingerprint identification cascade scan circuit is disposed on the second bezel or the fourth bezel;
the fingerprint identification circuit also comprises a reset control end;
the fingerprint identification scanning lead wires comprise a plurality of fingerprint identification scanning lead wires, and the fingerprint identification scanning lead wires are electrically connected with the fingerprint identification scanning lead wires in a one-to-one correspondence manner;
the second fingerprint identification cascade scanning circuit is electrically connected with the reset control scanning leads, the reset control scanning line is electrically connected with the reset control end of the fingerprint identification circuit, and the second fingerprint identification cascade scanning circuit is used for outputting fingerprint identification reset control signals to the reset control end of the fingerprint identification circuit.
6. The display panel according to claim 5, wherein the fingerprint identification cascade scan circuit further comprises a third fingerprint identification cascade scan circuit, and the third fingerprint identification cascade scan circuit is disposed on the second bezel or the fourth bezel;
the fingerprint identification circuit further comprises a gating control end;
the fingerprint identification scanning system comprises a plurality of fingerprint scanning lines, a plurality of fingerprint identification scanning leads and a plurality of gating control scanning leads, wherein the fingerprint scanning lines further comprise a plurality of gating control scanning lines, and the gating control scanning leads are electrically connected with the gating control scanning lines in a one-to-one correspondence manner;
the third fingerprint identification cascade scanning circuit is electrically connected with the gating control scanning leads, the gating control scanning lines are electrically connected with the gating control end of the fingerprint identification circuit, and the third fingerprint identification cascade scanning circuit is used for outputting gating control signals of fingerprint identification to the gating control end of the fingerprint identification circuit.
7. The display panel according to claim 2, wherein the display cascade scan circuit comprises a first display cascade scan circuit and a second display cascade scan circuit;
the first display cascade scanning circuit is arranged on the first frame, and the second display cascade scanning circuit is arranged on the third frame.
8. The display panel according to claim 7, wherein the first display cascade scanning circuit is electrically connected to an odd-row display scanning line; the second display cascade scanning circuit is electrically connected with the even-numbered display scanning lines; or alternatively
The first display cascade scanning circuit and the second display cascade scanning circuit are electrically connected with all the display scanning lines.
9. The display panel of claim 1, wherein the display cascade scan circuit comprises a plurality of display drive shift registers and the fingerprinting cascade scan circuit comprises a plurality of fingerprinting drive shift registers.
10. The display panel according to claim 1, further comprising a display driver chip and a fingerprint recognition driver chip;
the display driving chip is electrically connected with the input end of the display cascade scanning circuit;
the fingerprint identification driving chip is electrically connected with the input end of the fingerprint identification cascade scanning circuit.
11. The display panel of claim 10, wherein the display driver chip and the fingerprint identification chip are integrated in the same chip.
12. A display device comprising the display panel according to any one of claims 1 to 11.
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| KR101993220B1 (en) * | 2012-10-29 | 2019-06-26 | 엘지디스플레이 주식회사 | Display device with integrated touch screen |
| TWI540514B (en) * | 2015-05-05 | 2016-07-01 | 晨星半導體股份有限公司 | Sensing apparatus for detecting user touch |
| CN106326859B (en) * | 2016-08-23 | 2019-11-01 | 京东方科技集团股份有限公司 | Fingerprint recognition driving circuit, array substrate, display device and fingerprint identification method |
| KR102652746B1 (en) * | 2016-10-24 | 2024-04-02 | 엘지디스플레이 주식회사 | Finger sensor integrated type touch screen panel |
| KR102483347B1 (en) * | 2016-12-12 | 2023-01-02 | 엘지디스플레이 주식회사 | Touch display device, touch sensing system, and touch sensing method |
| KR20180087523A (en) * | 2017-01-24 | 2018-08-02 | 삼성디스플레이 주식회사 | Touch sensor and display device including the same |
| KR102603691B1 (en) * | 2017-12-29 | 2023-11-17 | 엘지디스플레이 주식회사 | Fingerprint sensing subpixel, driving circuit and display device |
| TWI711953B (en) * | 2018-06-11 | 2020-12-01 | 鴻海精密工業股份有限公司 | Array substrate, display panel and display device using same |
| WO2020154894A1 (en) * | 2019-01-29 | 2020-08-06 | 京东方科技集团股份有限公司 | Display substrate, display panel, preparation method of display substrate and drive method |
| CN110008883B (en) * | 2019-03-28 | 2021-06-18 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110097038A (en) * | 2019-05-28 | 2019-08-06 | 武汉华星光电技术有限公司 | Optical finger print identification circuit and array |
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