CN112732119B - Touch display panel - Google Patents
Touch display panel Download PDFInfo
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- CN112732119B CN112732119B CN202110010904.2A CN202110010904A CN112732119B CN 112732119 B CN112732119 B CN 112732119B CN 202110010904 A CN202110010904 A CN 202110010904A CN 112732119 B CN112732119 B CN 112732119B
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- electrode
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- display panel
- fingerprint identification
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The application provides a touch display panel, which comprises a touch area and a fingerprint identification area adjacent to the touch area; the touch display panel comprises a display layer, a film packaging layer and an electrode layer which are arranged in a stacked manner, wherein the electrode layer comprises a touch electrode corresponding to the touch area and a fingerprint identification electrode corresponding to the fingerprint identification area; the color filter layer is arranged on the electrode layer and corresponds to the pixel point in the display layer; the shading layer is arranged on the electrode layer and is correspondingly positioned between two adjacent pixel points. The application is through directly making touch electrode and fingerprint identification electrode on the film packaging layer, need not to paste optical fingerprint module outward to can reduce touch display panel's thickness, realize ultra-thin touch display panel structure, and reduce cost.
Description
Technical Field
The application relates to the technical field of display, in particular to a touch display panel.
Background
Under the condition that a full-screen mobile phone is widely popularized, an on-screen fingerprint identification technology has become an important technology focused on the consumer electronics field due to convenient identity authentication operation, and the current on-screen fingerprint identification technology mainly uses optical under-screen fingerprint identification. But the external fingerprint identification module requires mechanism materials such as buffer foam, radiating copper sheets and the like below the screen to be hollowed out, so that the whole machine structure space is occupied, and the product cost is additionally increased. Meanwhile, the thickness of the whole structure is increased after the fingerprint identification module is matched with the screen, which is not beneficial to the development of light and thin touch display device.
Therefore, the prior art has defects and needs to be solved urgently.
Disclosure of Invention
The application provides a touch display panel, can reduce touch display panel's thickness, realize ultra-thin touch display panel structure to reduce cost.
In order to solve the problems, the technical scheme provided by the application is as follows:
the application provides a touch display panel, which comprises a touch area and a fingerprint identification area adjacent to the touch area;
the touch display panel comprises a display layer, a film packaging layer and an electrode layer which are arranged in a stacked manner, wherein the electrode layer comprises a touch electrode corresponding to the touch area and a fingerprint identification electrode corresponding to the fingerprint identification area;
the color filter layer is arranged on the electrode layer and corresponds to the pixel point in the display layer;
the shading layer is arranged on the electrode layer and is correspondingly positioned between two adjacent pixel points.
In the touch display panel of the application, the electrode layer comprises a first electrode layer and a second electrode layer positioned on the first electrode layer, and an insulating layer is arranged between the first electrode layer and the second electrode layer.
In the touch display panel of the application, the first electrode layer comprises a fingerprint identification electrode located in the fingerprint identification area and a first electrode located in the touch area, and the second electrode layer comprises a touch electrode located in the touch area and a second electrode located in the fingerprint identification area.
In the touch display panel of the present application, the first electrode layer is a transparent electrode.
In the touch display panel of the application, the fingerprint recognition electrode is arranged corresponding to the pixel point, and the touch electrode is correspondingly positioned between two adjacent pixel points.
In the touch display panel, a plurality of fingerprint identification electrodes in a first direction are connected to form a first fingerprint identification electrode line, and a plurality of fingerprint identification electrodes in a second direction are connected to form a second fingerprint identification electrode line; the plurality of touch electrodes in the first direction are connected into a first touch electrode line, and the plurality of touch electrodes in the second direction are connected into a second touch electrode line, wherein the first direction is intersected with the second direction.
In the touch display panel of the application, a first via hole and a second via hole are formed in the insulating layer, the first electrode is connected with two adjacent touch electrodes in the second direction through the first via hole, and the second electrode is connected with two adjacent fingerprint identification electrodes in the first direction through the second via hole.
In the touch display panel of the present application, two adjacent touch electrodes in the first direction are connected through the second electrode layer, and two adjacent fingerprint recognition electrodes in the second direction are connected through the first electrode layer.
In the touch display panel of the present application, the touch electrode and the second electrode are both in a grid shape.
In the touch display panel of the application, the touch display panel further comprises a flat layer, an optical adhesive layer and a protective cover plate, wherein the flat layer, the optical adhesive layer and the protective cover plate are arranged on the color filter layer and the shading layer, and the protective cover plate is bonded with the flat layer through the optical adhesive layer.
The beneficial effects of this application are: the application provides a touch display panel, through directly making touch electrode and fingerprint identification electrode on the film packaging layer, with fingerprint identification and touch integration on display panel to need not to paste the optical fingerprint module outward and alright realize fingerprint identification function. And the color filter layer and the shading layer are manufactured on the touch electrode and the fingerprint identification electrode, so that the function of externally attaching the polaroid can be replaced. Compared with the traditional fingerprint identification touch display device, the overall thickness of the touch display panel is greatly reduced, an ultrathin touch display panel structure can be realized, and the cost is reduced.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view of a touch display panel according to an embodiment of the disclosure;
fig. 3 is a schematic partial view of a touch area of a touch display panel according to an embodiment of the disclosure;
fig. 4 is a schematic partial view of a fingerprint identification area of a touch display panel according to an embodiment of the disclosure;
FIG. 5 is a schematic cross-sectional view of an electrode layer of a fingerprint recognition area according to one embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of an electrode layer of a touch area according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a first fingerprint identification electrode wire according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the present application, "/" means "or" in the meaning.
The present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.
Referring to fig. 1, the touch display panel provided by the present application includes a touch area 1 and a fingerprint identification area 2 adjacent to the touch area 1, wherein the touch area 1 and the fingerprint identification area 2 have display functions, and the fingerprint identification area 2 has the same/similar display effect as the touch area 1.
Fig. 2 is a schematic cross-sectional view of a touch display panel provided by the present application. The touch display panel includes: a substrate 10, wherein the substrate 10 may be a glass substrate or a flexible substrate; an array driving layer 20 disposed on the substrate 10; a display layer 30 disposed on the array driving layer 20; a thin film encapsulation layer 40 disposed on the display layer 30; an electrode layer 50 disposed on the thin film encapsulation layer 40; a color filter layer 60 and a light shielding layer 70 disposed on the electrode layer 50; a planarization layer 80 disposed on the color filter layer 60 and the light shielding layer 70; the protective cover plate 100 is disposed on the flat layer 80, and the protective cover plate 100 and the flat layer 80 are adhered by the optical adhesive layer 90.
The array driving layer 20 includes pixel circuits, the display layer 30 includes pixel points distributed in an array, the pixel circuits are electrically connected with the pixel points, and the pixel circuits are used for driving the pixel points to emit light. The pixel includes a red sub-pixel 301, a green sub-pixel 302, and a blue sub-pixel 303.
The film encapsulation layer 40 includes an inorganic layer and an organic layer that are stacked together, and is used for encapsulating the touch display panel, so as to prevent the display layer 30 from being damaged by the penetration of external water vapor and the like.
The electrode layer 50 includes a first electrode layer 501 and a second electrode layer 502 disposed on the first electrode layer 501, and an insulating layer 503 is disposed between the first electrode layer 501 and the second electrode layer 502.
The color filter layer 60 includes a red filter layer 601, a green filter layer 602, and a blue filter layer 603. The red filter layer 601 is disposed opposite to the red sub-pixel 301, the green filter layer 602 is disposed opposite to the green sub-pixel 302, and the blue filter layer 603 is disposed opposite to the blue sub-pixel 303. The light shielding layer 70 is located between different color filter layers and exposes the pixel points, and the light shielding layer 70 is preferably a black matrix.
The planarization layer 80 is used to planarize the surfaces of the color filter layer 60 and the light shielding layer 70 so that the protective cover 100 is adhered to the planarized surface. In other embodiments, the protective cover 100 may also be directly adhered to the surface of the color filter layer 60 and the light shielding layer 70 by the optical adhesive layer 90, without disposing the planarization layer 80.
It should be noted that, for better display effect, the material of the optical adhesive layer 90 is a transparent material, and the light transmittance of the flat layer 80 is greater than 85%.
Fig. 3 is a schematic partial view of a touch area of a touch display panel according to an embodiment of the present disclosure, as shown in fig. 3 and fig. 4. Fig. 4 is a schematic partial view of a fingerprint identification area of a touch display panel according to an embodiment of the disclosure. The electrode layer 50 includes a touch electrode 5021 corresponding to the touch area 1 and a fingerprint recognition electrode 5011 corresponding to the fingerprint recognition area 2. The touch electrode 5021 can realize a touch function, and the fingerprint recognition electrode 5011 can realize a fingerprint recognition function. The application integrates the fingerprint identification and the touch function on the film packaging layer 40, and does not need to be externally attached with an optical fingerprint module independently, so that the thickness of the whole touch display panel is reduced, and the cost is reduced. In addition, the color filter layer and the shading layer are manufactured on the touch electrode and the fingerprint identification electrode, and the function of externally attaching the polaroid can be replaced, so that the thickness of the whole touch display panel can be further reduced, and the ultra-thin touch display panel is realized.
Specifically, the first electrode layer 501 includes a fingerprint recognition electrode 5011 located in the fingerprint recognition area 2 and a first electrode 5012 located in the touch area 1, where the fingerprint recognition electrodes 5011 are arranged in an array; the second electrode layer 502 includes a touch electrode 5021 located in the touch area 1 and a second electrode 5022 located in the fingerprint recognition area 2, where the touch electrodes 5021 are arranged in an array. The fingerprint recognition electrode 5011 is disposed corresponding to the pixel points, and the touch electrode 5021 is correspondingly disposed between two adjacent pixel points.
Preferably, the first electrode layer 501 is a transparent electrode, so that normal display of the touch display panel is not affected.
The second electrode layer 502 may be a latticed metal electrode layer, that is, the touch electrode 5021 and the second electrode 5022 are all latticed. When the second electrode layer 502 is a metal electrode layer, the orthographic projection of the light shielding layer 70 on the thin film encapsulation layer 40 covers the orthographic projection of the second electrode layer 502 on the thin film encapsulation layer 40, so that the opaque second electrode layer 502 can be well shielded. In other embodiments, the second electrode layer 502 may also be a transparent electrode layer.
In this embodiment, the first direction intersects the second direction, e.g., the first direction intersects the second direction at 90 degrees. A plurality of the fingerprint recognition electrodes 5011 in the first direction are connected to form a first fingerprint recognition electrode line, and a plurality of the fingerprint recognition electrodes 5011 in the second direction are connected to form a second fingerprint recognition electrode line. The first fingerprint recognition electrode line is intersected with the second fingerprint recognition electrode line, and a fingerprint recognition electrode 5011 on the first fingerprint recognition electrode line and an adjacent fingerprint recognition electrode 5011 on the second fingerprint recognition electrode line form a capacitor, so that fingerprint recognition is realized.
The plurality of touch electrodes 5021 in the first direction are connected to form a first touch electrode line, and the plurality of touch electrodes 5021 in the second direction are connected to form a second touch electrode line. The first touch electrode line intersects the second touch electrode line, and a touch electrode 5021 on the first touch electrode line and an adjacent touch electrode 5021 on the second touch electrode line form a capacitor, so as to realize a touch function.
Referring to fig. 5 and fig. 6, fig. 5 is a schematic cross-sectional view of an electrode layer of a fingerprint recognition area according to an embodiment of the present application; fig. 6 is a schematic cross-sectional view of an electrode layer of a touch area according to an embodiment of the disclosure. The insulating layer 503 is provided with a first via 5031 and a second via 5032, the first via 5031 and the second via 5032 penetrate through the insulating layer 503, the first via 5031 is located in the touch area 1, and the second via 5032 is located in the fingerprint identification area 2. The first electrode 5012 is connected to two adjacent touch electrodes 5021 in the second direction through the first via 5031 to form the second touch electrode line. The second electrode 5022 connects two adjacent fingerprint recognition electrodes 5011 in the first direction through the second via 5032 to form the second fingerprint recognition electrode line. Two adjacent touch electrodes 5021 in the first direction are connected through the second electrode layer 502, and two adjacent fingerprint recognition electrodes 5011 in the second direction are connected through the first electrode layer 501.
In one embodiment, the first electrode layer 501 further includes a first free electrode located in the touch area 1, where the first free electrode is not electrically connected, and has no actual electrical characteristics, so as to maintain the optical uniformity/etching uniformity of the touch area 1 and the fingerprint recognition area 2. The first dummy electrode and the fingerprint recognition electrode 5011 have the same shape and size, and the first dummy electrode is disposed corresponding to the pixel point.
The second electrode layer 502 further includes a second empty electrode located in the fingerprint recognition area 2, where the second empty electrode is not electrically connected, and has no actual electrical characteristics, so that the fingerprint recognition area 2 maintains optical uniformity/etching uniformity with the touch area 1. The second empty electrode has the same shape and size as the touch electrode 5021, and is disposed at a gap between two adjacent pixel points.
Fig. 7 is a schematic structural diagram of a first fingerprint recognition electrode wire according to an embodiment of the present application. The plurality of fingerprint recognition electrodes 5011 are distributed in an array manner in the first direction, the second electrodes 5022 are arranged in a strip shape corresponding to the first fingerprint recognition electrode lines, the edges of the fingerprint recognition electrodes 5011 are overlapped with the second electrodes 5022, and the second through holes 5032 are located at the overlapped positions of the fingerprint recognition electrodes 5011 and the second electrodes 5022. The second electrode 5022 connects two adjacent fingerprint recognition electrodes 5011 in the first direction through the second via 5032 to form the second fingerprint recognition electrode line.
In another embodiment, the second electrode 5022 may be directly fabricated on the fingerprint recognition electrode 5011 as a connection structure of the second fingerprint recognition electrode line, and the second electrode 5022 is only arranged in an insulating manner with the first fingerprint recognition electrode line at a junction of the first fingerprint recognition electrode line and the second fingerprint recognition electrode line. Similarly, the second dummy electrode may be directly fabricated on the corresponding fingerprint recognition electrode 5011. Therefore, in the fingerprint recognition area, the second electrode layer corresponding to the fingerprint recognition electrode 5011 can be used as a complementary electrode to be directly connected with the fingerprint recognition electrode 5011, so that the effect of reducing electrode impedance is achieved, and the fingerprint sensing signal transmission effect can be improved.
Similarly, in the touch area, the touch electrode 5021 may also be directly fabricated on the peripheral edge of the first empty electrode, and the first touch electrode line and the second touch electrode line are disposed in an insulating manner at the junction. In this way, in the touch area, the first electrode layer corresponding to the touch electrode 5021 can be used as a supplementary electrode to be directly connected with the touch electrode 5021, so as to reduce the electrode impedance, thereby improving the effect of transmitting the touch signal.
In other embodiments, the second electrode 5022 may be only located between two adjacent fingerprint recognition electrodes 5011, and one second electrode 5022 is correspondingly connected to two adjacent fingerprint recognition electrodes 5011.
It can be understood that the foregoing embodiments of the present application exemplify mutual capacitive touch and mutual capacitive fingerprint recognition, and may be self-capacitive touch or self-capacitive fingerprint recognition in other embodiments of the present application, which is not limited herein.
The application provides through direct preparation touch electrode and fingerprint identification electrode on the film packaging layer, with fingerprint identification and touch-control integration on display panel to need not to paste optical fingerprint module outward alright realize fingerprint identification function. Compared with the traditional fingerprint identification touch display device, the overall thickness of the touch display panel is greatly reduced, an ultrathin touch display panel structure can be realized, and the cost is reduced.
In summary, although the present application has been described with reference to the preferred embodiments, the preferred embodiments are not intended to limit the application, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the application, and the scope of the application is therefore defined by the claims.
Claims (8)
1. The touch display panel is characterized by comprising a touch area and a fingerprint identification area adjacent to the touch area;
the touch display panel comprises a display layer, a film packaging layer and an electrode layer which are arranged in a stacked manner, wherein the electrode layer comprises a touch electrode corresponding to the touch area and a fingerprint identification electrode corresponding to the fingerprint identification area;
the color filter layer is arranged on the electrode layer and corresponds to the pixel point in the display layer;
the shading layer is arranged on the electrode layer and is correspondingly positioned between two adjacent pixel points;
the electrode layer comprises a first electrode layer and a second electrode layer positioned on the first electrode layer, and an insulating layer is arranged between the first electrode layer and the second electrode layer;
the first electrode layer comprises a fingerprint identification electrode located in the fingerprint identification area, a first electrode located in the touch area and a first empty electrode, the second electrode layer comprises a touch electrode located in the touch area, a second electrode located in the fingerprint identification area and a second empty electrode located in the fingerprint identification area, the first electrode is electrically connected with the touch electrode, the second electrode is electrically connected with the fingerprint identification electrode, the first empty electrode corresponds to the touch electrode, and the second empty electrode corresponds to the fingerprint identification electrode.
2. The touch display panel of claim 1, wherein the first electrode layer is a transparent electrode.
3. The touch display panel according to claim 1, wherein the fingerprint recognition electrodes are disposed corresponding to the pixel points, and the touch electrodes are disposed between two adjacent pixel points.
4. A touch display panel according to claim 3, wherein a plurality of the fingerprint recognition electrodes in a first direction are connected as a first fingerprint recognition electrode line, and a plurality of the fingerprint recognition electrodes in a second direction are connected as a second fingerprint recognition electrode line; the plurality of touch electrodes in the first direction are connected into a first touch electrode line, and the plurality of touch electrodes in the second direction are connected into a second touch electrode line, wherein the first direction is intersected with the second direction.
5. The touch display panel according to claim 4, wherein a first via hole and a second via hole are disposed on the insulating layer, the first electrode is connected to two adjacent touch electrodes in the second direction through the first via hole, and the second electrode is connected to two adjacent fingerprint recognition electrodes in the first direction through the second via hole.
6. The touch display panel according to claim 5, wherein two adjacent touch electrodes in the first direction are connected through the second electrode layer, and two adjacent fingerprint recognition electrodes in the second direction are connected through the first electrode layer.
7. The touch display panel according to claim 5, wherein the touch electrode and the second electrode are both in a grid shape.
8. The touch display panel of claim 1, further comprising a planarization layer disposed over the color filter layer and the light shielding layer, an optical adhesive layer, and a protective cover plate bonded to the planarization layer via the optical adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110010904.2A CN112732119B (en) | 2021-01-06 | 2021-01-06 | Touch display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110010904.2A CN112732119B (en) | 2021-01-06 | 2021-01-06 | Touch display panel |
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| CN112732119A CN112732119A (en) | 2021-04-30 |
| CN112732119B true CN112732119B (en) | 2023-07-25 |
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| CN202110010904.2A Active CN112732119B (en) | 2021-01-06 | 2021-01-06 | Touch display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217706B (en) * | 2021-11-24 | 2024-06-21 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN114327145B (en) * | 2021-12-30 | 2024-04-26 | 昆山工研院新型平板显示技术中心有限公司 | Touch display panel |
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| KR102698759B1 (en) * | 2016-09-02 | 2024-08-26 | 삼성디스플레이 주식회사 | Touch panel and display device including the same |
| CN106897660A (en) * | 2016-09-27 | 2017-06-27 | 关键禾芯科技股份有限公司 | Liquid-crystal apparatus with identification of fingerprint |
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| CN111261690A (en) * | 2020-02-10 | 2020-06-09 | 武汉华星光电半导体显示技术有限公司 | OLED device |
| CN111665992B (en) * | 2020-06-16 | 2022-04-01 | 武汉华星光电半导体显示技术有限公司 | Display module |
| CN111668277B (en) * | 2020-06-24 | 2022-08-23 | 湖北长江新型显示产业创新中心有限公司 | Display device |
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| CN208938076U (en) * | 2018-08-24 | 2019-06-04 | 北京集创北方科技股份有限公司 | Touch control display apparatus |
| WO2020125766A1 (en) * | 2018-12-21 | 2020-06-25 | 中兴通讯股份有限公司 | Fingerprint recognition apparatus and method, terminal, and storage medium |
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