CN112732119A - Touch display panel - Google Patents
Touch display panel Download PDFInfo
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- CN112732119A CN112732119A CN202110010904.2A CN202110010904A CN112732119A CN 112732119 A CN112732119 A CN 112732119A CN 202110010904 A CN202110010904 A CN 202110010904A CN 112732119 A CN112732119 A CN 112732119A
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- fingerprint identification
- display panel
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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
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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
- G06F3/044—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 thin film packaging layer and an electrode layer which are arranged in a stacked mode, 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 is arranged corresponding to the pixel points in the display layer; and the shading layer is arranged on the electrode layer and is correspondingly positioned between the two adjacent pixel points. This application need not outer optical fingerprint module of pasting through direct preparation touch-control electrode and fingerprint identification electrode on the film packaging layer to can reduce touch-control display panel thickness, realize ultra-thin touch-control 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 in-screen fingerprint identification technology becomes a key technology concerned in the field of consumer electronics due to convenient identity authentication operation, the current in-screen fingerprint identification technology mainly identifies fingerprints under an optical screen, the technology utilizes light-emitting pixels of an OLED display as a light source, and a fingerprint module micro-lens is utilized to read reflected light of the fingerprints and convert the reflected light into an electric signal so as to read a fingerprint image. However, the externally-attached fingerprint identification module requires that the materials of the mechanisms, such as the buffer foam, the heat dissipation copper sheet and the like, below the screen are hollowed, so that the structural space of the whole machine is occupied, and the product cost is additionally increased. Meanwhile, the thickness of the whole structure is increased after the externally-attached fingerprint identification module is matched with the screen, and the development of light and thin touch display device is not facilitated.
Therefore, the prior art has defects which need 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 above problems, the technical solution provided by the present 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 thin film packaging layer and an electrode layer which are arranged in a stacked mode, 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 is arranged corresponding to the pixel points in the display layer;
and the shading layer is arranged on the electrode layer and is correspondingly positioned between the two adjacent pixel points.
In the touch display panel of the present application, the electrode layer includes a first electrode layer and a second electrode layer located above the first electrode layer, and an insulating layer is disposed between the first electrode layer and the second electrode layer.
In the touch-control display panel of this application, first electrode layer is including being located the fingerprint identification electrode in fingerprint identification district with be located the first electrode in touch-control district, the second electrode layer is including being located the touch-control electrode in touch-control district with be located the second electrode in fingerprint identification district.
In the touch display panel of the present application, the first electrode layer is a transparent electrode.
In the touch display panel, the fingerprint identification electrode is arranged corresponding to the pixel points, and the touch electrode is correspondingly arranged between two adjacent pixel points.
In the touch display panel, a plurality of fingerprint identification electrodes in a first direction are connected into a first fingerprint identification electrode line, and a plurality of fingerprint identification electrodes in a second direction are connected into a second fingerprint identification electrode line; the touch electrodes in the first direction are connected to form a first touch electrode line, and the touch electrodes in the second direction are connected to form a second touch electrode line, wherein the first direction and the second direction are intersected.
In the touch-control display panel of this application, be provided with first via hole and second via hole on the insulating layer, first electrode passes through first via hole is connected the ascending adjacent two of second touch-control electrode, the second electrode passes through second via hole is connected adjacent two on the first direction the fingerprint identification electrode.
In the touch display panel, two adjacent touch electrodes in the first direction are connected through the second electrode layer, and two adjacent fingerprint identification 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 light shielding layer, and the protective cover plate passes through the optical adhesive layer and the flat layer.
The beneficial effect of this application does: the application provides a touch-control display panel through directly making touch-control electrode and fingerprint identification electrode on the film packaging layer, with fingerprint identification and touch-control integration on display panel to need not outer optical fingerprint module alright realize the 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 a polarizer can be replaced. Compare in traditional fingerprint identification touch-control display device, the whole thickness of the touch-control display panel of this application reduces greatly, can realize ultra-thin touch-control display panel structure to reduce cost.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the 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 present disclosure;
fig. 3 is a partial schematic view of a touch area of a touch display panel according to an embodiment of the present disclosure;
fig. 4 is a partial schematic view of a fingerprint identification area of a touch display panel according to an embodiment of the present disclosure;
FIG. 5 is a schematic cross-sectional view of an electrode layer of a fingerprint identification area according to an embodiment of the present application;
fig. 6 is a schematic cross-sectional view illustrating 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 line 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 is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, "/" means "or".
The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate 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, where the touch area 1 and the fingerprint identification area 2 both have a display function, and the fingerprint identification area 2 has a display effect the same as/similar to that of the touch area 1.
Fig. 2 is a schematic cross-sectional view of a touch display panel according to the present application. The touch display panel includes: the substrate 10 may be a glass substrate, or may be 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; and the protective cover plate 100 is arranged on the flat layer 80, and the protective cover plate 100 is bonded with the flat layer 80 through the optical adhesive layer 90.
The array driving layer 20 includes pixel circuits, the display layer 30 includes pixels distributed in an array, the pixel circuits are electrically connected to the pixels, and the pixel circuits are used for driving the pixels to emit light. The pixel includes a red subpixel 301, a green subpixel 302, and a blue subpixel 303.
The film encapsulation layer 40 includes an inorganic layer and an organic layer stacked on each other, and is used for encapsulating the touch display panel, so as to prevent the display layer 30 from being damaged by external moisture or the like.
The electrode layer 50 includes a first electrode layer 501 and a second electrode layer 502 located above 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 over the red sub-pixel 301, the green filter layer 602 is disposed over the green sub-pixel 302, and the blue filter layer 603 is disposed over the blue sub-pixel 303. The light shielding layer 70 is located between the different color filter layers and exposes the pixel points, and the light shielding layer 70 preferably selects a black matrix.
The planarization layer 80 is used to planarize the surfaces of the color filter layer 60 and the light shield layer 70, so that the protective cover sheet 100 is bonded to the planarized surface. In other embodiments, the protective cover plate 100 may also be directly adhered to the surfaces of the color filter layer 60 and the light shielding layer 70 through the optical adhesive layer 90 without providing 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 planarization layer 80 is greater than 85%.
Referring to fig. 3 and 4, fig. 3 is a partial schematic view of a touch area of a touch display panel according to an embodiment of the present disclosure. Fig. 4 is a partial schematic view of a fingerprint identification area of a touch display panel according to an embodiment of the present application. 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 identification electrode 5011 can realize a fingerprint identification function. This application with fingerprint identification and touch-control function integrated in on the film packaging layer 40, need not separately outer optical fingerprint module of pasting to reduce touch-control display panel's complete machine thickness, reduce cost. 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 sticking the polaroid outside can be replaced, so that the thickness of the whole touch display panel can be further reduced, and the ultra-thinness of the touch display panel is realized.
Specifically, the first electrode layer 501 includes a fingerprint identification electrode 5011 located in the fingerprint identification area 2 and a first electrode 5012 located in the touch area 1, and the fingerprint identification 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 identification area 2, and the touch electrodes 5021 are arranged in an array. The fingerprint identification electrode 5011 is arranged corresponding to the pixel points, and the touch electrode 5021 is correspondingly located between two adjacent pixel points.
Preferably, the first electrode layer 501 is a transparent electrode, so that the normal display of the touch display panel is not affected.
The second electrode layer 502 may be a metal electrode layer in a grid shape, that is, the touch electrode 5021 and the second electrode 5022 are both in a grid shape. 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, for example, the first direction intersects the second direction at 90 degrees. The plurality of fingerprint recognition electrodes 5011 in the first direction are connected to form a first fingerprint recognition electrode line, and the plurality of fingerprint recognition electrodes 5011 in the second direction are connected to form a second fingerprint recognition electrode line. The first fingerprint identification electrode line is intersected with the second fingerprint identification electrode line, and a fingerprint identification electrode 5011 on the first fingerprint identification electrode line and an adjacent fingerprint identification electrode 5011 on the second fingerprint identification electrode line form a capacitor, so that fingerprint identification is realized.
The touch electrodes 5021 in the first direction are connected to form a first touch electrode line, and the touch electrodes 5021 in the second direction are connected to form a second touch electrode line. The first touch electrode line intersects with 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 that a touch function is realized.
Referring to fig. 5 and 6, fig. 5 is a schematic cross-sectional view of an electrode layer of a fingerprint identification area according to an embodiment of the present application; fig. 6 is a schematic cross-sectional view of an electrode layer of a touch region according to an embodiment of the present disclosure. A first via 5031 and a second via 5032 are disposed on the insulating layer 503, 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 is connected to two adjacent fingerprint identification electrodes 5011 in the first direction through the second via 5032 to form the second fingerprint identification electrode line. Two adjacent touch electrodes 5021 in the first direction are connected through the second electrode layer 502, and two adjacent fingerprint identification 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 vacant electrode located in the touch area 1, and the first vacant 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 identification area 2. The shape and size of the first vacant electrode are the same as those of the fingerprint identification electrode 5011, and the first vacant electrode is arranged corresponding to the pixel points.
The second electrode layer 502 further includes a second vacant electrode located in the fingerprint identification area 2, and the second vacant electrode is not electrically connected, has no actual electrical characteristic, and is used for keeping the optical consistency/etching uniformity of the fingerprint identification area 2 and the touch area 1. The shape and size of the second vacant electrode are the same as those of the touch electrode 5021, and the second vacant electrode is arranged corresponding to a gap between two adjacent pixels.
Fig. 7 is a schematic structural diagram of a first fingerprint identification electrode line according to an embodiment of the present application. The plurality of fingerprint identification electrodes 5011 are distributed in an array manner in a first direction, the second electrodes 5022 are arranged in a strip shape and correspond to the first fingerprint identification electrode lines, the edges of the fingerprint identification electrodes 5011 are overlapped with the second electrodes 5022, and the second through holes 5032 are located at the overlapping positions of the fingerprint identification electrodes 5011 and the second electrodes 5022. The second electrode 5022 is connected to two adjacent fingerprint identification electrodes 5011 in the first direction through the second via 5032 to form the second fingerprint identification electrode line.
In another embodiment, the second electrode 5022 is used as a connection structure of the second fingerprint identification electrode line and can be directly manufactured on the fingerprint identification electrode 5011, and the second electrode 5022 is only arranged at the intersection of the first fingerprint identification electrode line and the second fingerprint identification electrode line in an insulating manner. Similarly, the second dummy electrode may also be directly formed on the corresponding fingerprint identification electrode 5011. Thus, in the fingerprint identification area, the second electrode layer corresponding to the fingerprint identification electrode 5011 can be directly connected with the fingerprint identification electrode 5011 as a supplementary electrode, so that the impedance of the electrode is reduced, and the transmission effect of fingerprint induction signals can be improved.
Similarly, in the touch area, the touch electrode 5021 may also be directly fabricated on the peripheral edge of the first vacant electrode, and the first touch electrode line and the second touch electrode line are insulated at the intersection. 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 impedance of the electrode, thereby improving the transmission effect of the touch signal.
In other embodiments, the second electrode 5022 may be only located between two adjacent fingerprint identification electrodes 5011, and one second electrode 5022 is correspondingly connected to two adjacent fingerprint identification electrodes 5011.
It is to be understood that the above embodiments of the present application illustrate mutually-compatible touch and mutually-compatible fingerprint identification, and other embodiments of the present application also can be self-contained touch or self-contained fingerprint identification, which is not limited herein.
The application provides through directly making touch-control electrode and fingerprint identification electrode on the film packaging layer, with fingerprint identification and touch-control integration on display panel to need not outer optics fingerprint module alright realize the fingerprint identification function. Compare in traditional fingerprint identification touch-control display device, the whole thickness of the touch-control display panel of this application reduces greatly, can realize ultra-thin touch-control display panel structure to reduce cost.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. A 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 thin film packaging layer and an electrode layer which are arranged in a stacked mode, 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 is arranged corresponding to the pixel points in the display layer;
and the shading layer is arranged on the electrode layer and is correspondingly positioned between the two adjacent pixel points.
2. The touch display panel according to claim 1, wherein the electrode layer comprises a first electrode layer and a second electrode layer located above the first electrode layer, and an insulating layer is disposed between the first electrode layer and the second electrode layer.
3. The touch display panel according to claim 2, wherein the first electrode layer includes a fingerprint recognition electrode located in the fingerprint recognition area and a first electrode located in the touch area, and the second electrode layer includes a touch electrode located in the touch area and a second electrode located in the fingerprint recognition area.
4. The touch display panel according to claim 3, wherein the first electrode layer is a transparent electrode.
5. The touch display panel according to claim 3, wherein the fingerprint identification electrode is disposed corresponding to the pixel points, and the touch electrode is correspondingly disposed between two adjacent pixel points.
6. The touch display panel according to claim 5, wherein the plurality of fingerprint identification electrodes in the first direction are connected to form a first fingerprint identification electrode line, and the plurality of fingerprint identification electrodes in the second direction are connected to form a second fingerprint identification electrode line; the touch electrodes in the first direction are connected to form a first touch electrode line, and the touch electrodes in the second direction are connected to form a second touch electrode line, wherein the first direction and the second direction are intersected.
7. The touch display panel according to claim 6, wherein the insulating layer is provided with a first via hole and a second via hole, 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 identification electrodes in the first direction through the second via hole.
8. The touch display panel according to claim 7, wherein two adjacent touch electrodes in the first direction are connected by the second electrode layer, and two adjacent fingerprint identification electrodes in the second direction are connected by the first electrode layer.
9. The touch display panel according to claim 7, wherein the touch electrode and the second electrode are both in a grid shape.
10. The touch display panel according to claim 1, further comprising a planarization layer, an optical adhesive layer, and a protective cover sheet disposed on the color filter layer and the light-shielding layer, wherein the protective cover sheet is bonded to the planarization layer through 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 |
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| 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 true CN112732119A (en) | 2021-04-30 |
| CN112732119B 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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| CN112732119B (en) | 2023-07-25 |
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