CN111045553B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN111045553B CN111045553B CN202010005141.8A CN202010005141A CN111045553B CN 111045553 B CN111045553 B CN 111045553B CN 202010005141 A CN202010005141 A CN 202010005141A CN 111045553 B CN111045553 B CN 111045553B
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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
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- Position Input By Displaying (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a touch display panel and a touch display device. The touch display panel comprises a display panel, a cover plate, a touch electrode layer, a conductive layer and a grounding electrode; the cover plate is positioned on the display panel; the touch electrode layer is positioned between the display panel and the cover plate; the conducting layer is positioned between the display panel and the touch electrode layer; the conductive layer includes a shield electrode; the shielding electrode is electrically connected with the grounding electrode; the touch electrode layer comprises a plurality of first touch electrodes arranged in a matrix; the orthographic projection of the shielding electrode on the cover plate is beyond the orthographic projection of the first touch electrode on the cover plate. The touch display device comprises a touch display panel. In the present invention, the potential of the shield electrode is equal to the ground potential. The shielding electrode prevents the electric signal of the display panel from interfering with the electric signal of the touch electrode layer. The light of the display panel passes through the shielding electrode. The shield electrode is only a part of the conductive layer. The parts of the conductive layer other than the shielding electrode may perform other functions. Such a conductive layer fulfils more functions.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a touch display panel and a touch display device.
[ background of the invention ]
In the Display technology, an Organic Light Emitting Display panel (OLED) is considered as a third generation Display technology following a Liquid Crystal Display (LCD) panel due to its advantages of lightness, thinness, active Light emission, fast response speed, wide viewing angle, rich colors, high brightness, low power consumption, and high and low temperature resistance.
The existing touch display panel includes not only an organic light emitting display panel but also a touch electrode layer. However, the electrical signal of the organic light emitting display panel interferes with the electrical signal of the touch electrode layer.
[ summary of the invention ]
In order to solve the above technical problems, the present invention provides a touch display panel and a touch display device.
A first aspect of the present invention provides a touch display panel, including a display panel, a cover plate, a touch electrode layer, a conductive layer, and a ground electrode;
the cover plate is positioned on the display panel;
the touch electrode layer is positioned between the display panel and the cover plate;
the conductive layer is positioned between the display panel and the touch electrode layer;
the conductive layer comprises a shield electrode;
the shielding electrode is electrically connected with the grounding electrode;
the touch electrode layer comprises a plurality of first touch electrodes arranged in a matrix manner;
the orthographic projection of the shielding electrode on the cover plate is out of the orthographic projection of the first touch electrode on the cover plate.
A second aspect of the invention provides a touch display device, which includes the touch display panel.
In the present invention, the display panel is used to display an image. The cover plate is positioned on the display panel. The cover plate protects the display panel. The light of the display panel penetrates through the cover plate. The touch electrode layer is used for self-capacitance touch or mutual capacitance touch. The touch electrode layer is located between the display panel and the cover plate. Such a touch display panel is thinner and lighter. The plurality of first touch electrodes are arranged in a matrix. The first touch electrode is used for detecting a touch position. The conductive layer is located between the display panel and the touch electrode layer. The shielding electrode is located between the display panel and the touch electrode layer. The shield electrode is electrically connected to the ground electrode. The potential of the shielding electrode is equal to ground potential. The shielding electrode shields an electric signal of the display panel or an electric signal of the touch electrode layer. The shielding electrode prevents the electric signal of the display panel and the electric signal of the touch electrode layer from interfering with each other. The light of the display panel passes through the shielding electrode. The touch electrode layer and the conductive layer are formed on the cover plate. The first touch electrode and the shield electrode are formed on the cover plate. The orthographic projection of the shielding electrode on the cover plate is beyond the orthographic projection of the first touch electrode on the cover plate. The shield electrode is only a part of the conductive layer. The parts of the conductive layer other than the shielding electrode may perform other functions. Such a conductive layer performs more functions.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 2 is a schematic top view of a conductive layer in a touch display panel according to an embodiment of the invention;
FIG. 3 is a schematic top view illustrating a touch electrode layer of a touch display panel according to an embodiment of the present invention;
FIG. 4 is a schematic top view of a touch electrode layer in another touch display panel according to an embodiment of the present invention;
fig. 5A is a schematic top view of a conductive layer in a touch display panel according to another embodiment of the invention;
FIG. 5B is a schematic top view of a conductive layer in a touch display panel according to another embodiment of the invention;
fig. 6 is a schematic cross-sectional view of another touch display panel in the embodiment of the invention on AA' of fig. 4 and 5B;
FIG. 7 is a schematic cross-sectional view of another touch display panel of the present invention on BB' of FIGS. 4 and 5B;
FIG. 8 is a schematic cross-sectional view of another touch display panel of the present invention on the AA' of FIGS. 4 and 5A;
FIG. 9 is a schematic cross-sectional view of another touch display panel of the present invention on BB' of FIGS. 4 and 5A;
FIG. 10 is a schematic top view of a conductive layer in a touch display panel according to another embodiment of the present invention;
FIG. 11 is a schematic top view of another touch display panel according to an embodiment of the invention;
FIG. 12 is a schematic cross-sectional view of a display panel of a touch display panel according to another embodiment of the present invention;
fig. 13 is a schematic top view of a touch display device according to an embodiment of the invention.
[ detailed description ] embodiments
In order to better understand the technical scheme of the invention, the following detailed description of the embodiments of the invention is made with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, 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 invention.
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. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
Fig. 1 is a schematic top view illustrating a touch electrode layer in a touch display panel according to an embodiment of the invention; fig. 2 is a schematic top view of a conductive layer in a touch display panel according to an embodiment of the invention; fig. 3 is a schematic cross-sectional view of a touch display panel according to an embodiment of the invention.
As shown in fig. 1 to 3, the touch display panel 1 includes a display panel 11, a cover plate 12, a touch electrode layer 13, a conductive layer 14, and a ground electrode 15; the cover plate 12 is positioned on the display panel 11; the touch electrode layer 13 is located between the display panel 11 and the cover plate 12; the conductive layer 14 is located between the display panel 11 and the touch electrode layer 13; the conductive layer 14 includes a shield electrode 141; the shield electrode 141 is electrically connected to the ground electrode 15; the touch electrode layer 13 includes a plurality of first touch electrodes 131 arranged in a matrix; the orthographic projection of the shielding electrode 141 on the cover 12 falls outside the orthographic projection of the first touch electrode 131 on the cover 12.
The display panel 11 is used to display an image. The cover plate 12 is positioned on the display panel 11. For example, the cover plate 12 is a glass cover plate. The cover plate 12 protects the display panel 11. The light of the display panel 11 passes through the cover plate 12. The touch electrode layer 13 is used for self-capacitance touch or mutual capacitance touch. The touch electrode layer 13 is located between the display panel 11 and the cover plate 12. Such a touch display panel 1 is thinner and lighter. The plurality of first touch electrodes 131 are arranged in a matrix. The first touch electrode 131 is used to detect a touch position. The conductive layer 14 is located between the display panel 11 and the touch electrode layer 13. The shielding electrode 141 is located between the display panel 11 and the touch electrode layer 13. The shield electrode 141 is electrically connected to the ground electrode 15. The potential of the shielding electrode 141 is equal to the ground potential. The shielding electrode 141 shields an electric signal of the display panel 11 or an electric signal of the touch electrode layer 13. The shielding electrode 141 prevents the electric signal of the display panel 11 and the electric signal of the touch electrode layer 13 from interfering with each other. The shielding electrode 141 uses a transparent conductive oxide or a mesh-shaped metal. Light of the display panel 11 passes through the shielding electrode 141. Alternatively, the touch electrode layer 13 and the conductive layer 14 are formed on the cover plate 12. Optionally, the first touch electrode 131 and the shielding electrode 141 are formed on the cover plate 12. The orthographic projection of the shielding electrode 141 on the cover 12 falls outside the orthographic projection of the first touch electrode 131 on the cover 12. The shielding electrode 141 may occupy a part of the conductive layer 14. The portion of the conductive layer 14 other than the shielding electrode 141 may perform other functions. Such a conductive layer 14 can perform more functions while performing a shielding function.
The grounding electrode 15 of the touch display panel 1 can be electrically connected to the grounding signal terminal of the external driving circuit. The ground electrode 15 of the touch display panel 1 is connected to the ground through a ground signal terminal of an external driving circuit. The external driving circuit is, for example, a flexible circuit board or an integrated circuit. A flexible circuit board or integrated circuit connects the ground electrode 15 to ground.
As shown in fig. 1 to 3, the conductive layer 14 further includes a plurality of second touch electrodes 142 arranged in a matrix, the second touch electrodes 142 are disposed corresponding to the first touch electrodes 131, and the second touch electrodes 142 are electrically connected to the first touch electrodes 131; the shielding electrodes 141 include first shielding electrodes 1411, and the first shielding electrodes 1411 are located between the adjacent second touch electrodes 142.
The second touch electrodes 142 are arranged in a matrix. The plurality of first touch electrodes 131 are arranged in a matrix. The arrangement of the second touch electrodes 142 is consistent with that of the first touch electrodes 131. The second touch electrode 142 is disposed corresponding to the first touch electrode 131. For example, the arrangement of the first touch electrodes 131 includes m rows and n columns of the first touch electrodes 131. The arrangement of the second touch electrodes 142 includes m rows and n columns of the second touch electrodes 142. Where m and n are both positive integers. The row 1, column 1, first touch electrode 131 and the row 1, column 1, second touch electrode 142 are disposed correspondingly. The row 1, column 2 first touch electrode 131 and the row 1, column 2 second touch electrode 142 are disposed correspondingly. The mth row and nth column first touch electrodes 131 are disposed corresponding to the mth row and nth column second touch electrodes 142. The rest rows and the rest columns of the first touch electrode 131 and the second touch electrode 142, and so on. The second touch electrode 142 is electrically connected to the first touch electrode 131. The second touch electrode 142 is disposed in parallel with the first touch electrode 131. The parallel resistance of the second touch electrode 142 and the first touch electrode 131 is smaller than the resistance of the first touch electrode 131. Such first and second touch electrodes 131 and 142 reduce touch resistance and thus improve touch signals. Meanwhile, the first shielding electrode 1411 is located between the adjacent second touch electrodes 142. The first shielding electrode 1411 is electrically insulated from the second touch electrode 142. The first shielding electrode 1411 prevents the electric signal of the display panel 11 and the electric signal of the touch electrode layer 13 from interfering with each other.
Each of the first touch electrodes 131 is electrically connected to at least one touch electrode line, and the first touch electrodes 131 transmit touch signals to the touch electrodes through the touch electrode lines.
As shown in fig. 3, in one embodiment, the first touch electrode 131 and the second touch electrode 142 have the same size. The distance between the adjacent first touch electrodes 131 and the adjacent second touch electrodes 142 is increased at the same time. Thus, the shielding electrode 141 is disposed between the adjacent second touch electrodes 142. In other embodiments, the size of the first touch electrode 131 is larger than that of the second touch electrode 142. Thus, the projection of the first touch electrode 131 covers the projection of the shielding electrode 141 between the adjacent second touch electrodes 142.
As shown in fig. 1 to 3, the touch display panel 1 further includes a first insulating layer 161 and a first via hole 171; the first insulating layer 161 is located between the conductive layer 14 and the touch electrode layer 13; the first via hole 171 penetrates the first insulating layer 161; when the first touch electrode 131 is a self-contained touch electrode; the projection of the first touch electrode 131 on the cover plate 12 covers the projection of the second touch electrode 142 on the cover plate 12, the first touch electrode 131 and the second touch electrode 142 are electrically connected one by one through the first via hole 171, where the one by one electrical connection through the first via hole 171 may be realized by depositing a conductive metal alone in the first via hole 171 of the first insulating layer 161 to electrically connect the first touch electrode and the second touch electrode, or may be realized by depositing a part of the second touch electrode 142 in the first via hole 171 when the second touch electrode 142 is deposited to electrically connect the first touch electrode and the second touch electrode.
The first insulating layer 161 is located between the conductive layer 14 and the touch electrode layer 13. The first insulating layer 161 electrically insulates the conductive layer 14 from the touch electrode layer 13. The first insulating layer 161 electrically insulates the shielding electrode 141 from the first touch electrode 131. The first touch electrode 131 is a self-contained touch electrode. The touch display panel 1 determines a touch position according to a capacitance between the self-capacitance touch electrode and the ground electrode. The first via hole 171 penetrates the first insulating layer 161. The first via hole 171 extends from the conductive layer 14 to the touch electrode layer 13 in the thickness direction of the first insulating layer 161. The projection of the first touch electrode 131 on the cover 12 covers the projection of the second touch electrode 142 on the cover 12. The first touch electrode 131 and the second touch electrode 142 overlap in the thickness direction of the first insulating layer 161. The first via hole 171 extends from the second touch electrode 142 to the first touch electrode 131 in the thickness direction of the first insulating layer 161. One end of the first via hole 171 is electrically connected to the second touch electrode 142 and the other end of the first via hole 171 is electrically connected to the first touch electrode 131. The first touch electrodes 131 and the second touch electrodes 142 are electrically connected one by one through the first via holes 171. The second touch electrode 142 is disposed in parallel with the first touch electrode 131. The parallel resistance of the second touch electrode 142 and the first touch electrode 131 is smaller than the resistance of the first touch electrode 131. Such first and second touch electrodes 131 and 142 reduce touch resistance and thus improve touch signals.
FIG. 4 is a schematic top view of a touch electrode layer of another touch display panel according to an embodiment of the invention;
fig. 5A is a schematic top view of a conductive layer in a touch display panel according to another embodiment of the invention; fig. 5B is a schematic top view of a conductive layer in another touch display panel according to an embodiment of the disclosure; FIG. 6 is a schematic cross-sectional view of another touch display panel of the present invention on the AA' of FIGS. 4 and 5B; FIG. 7 is a schematic cross-sectional view of another touch display panel of the present invention on BB' of FIGS. 4 and 5B; FIG. 8 is a schematic cross-sectional view of another touch display panel of the present invention on the AA' of FIGS. 4 and 5A; fig. 9 is a schematic cross-sectional view of another touch display panel of the present invention on BB' of fig. 4 and 5A.
As shown in fig. 4 to 9, the touch display panel 1 further includes a second insulating layer 162 and a second via hole 172; the second insulating layer 162 is located between the conductive layer 14 and the touch electrode layer 13; the second via 172 penetrates the second insulating layer 162; the first touch electrode 131 includes a first touch driving electrode 1311 and a first touch sensing electrode 1312; the second touch electrode 142 includes a second touch driving electrode 1421 and a second touch sensing electrode 1422; the first touch driving electrode 1311 and the second touch driving electrode 1421 are electrically connected through the second via hole 172; the first touch sensing electrode 1312 and the second touch sensing electrode 1422 are electrically connected through the second via hole 172.
The second insulating layer 162 is located between the conductive layer 14 and the touch electrode layer 13. The second insulating layer 162 electrically insulates the conductive layer 14 from the touch electrode layer 13. The second insulating layer 162 electrically insulates the shielding electrode 141 from the first touch electrode 131. The second via hole 172 penetrates the second insulating layer 162. The second via hole 172 extends from the conductive layer 14 to the touch electrode layer 13 in the thickness direction of the second insulating layer 162. In the touch electrode layer 13, the first touch driving electrode 1311 and the first touch sensing electrode 1312 are used for mutual capacitance touch. The touch display panel 1 determines a touch position according to the capacitance between the first touch driving electrode 1311 and the first touch sensing electrode 1312. The first touch driving electrode 1311 and the second touch driving electrode 1421 are electrically connected through the second via hole 172. The first touch sensing electrode 1312 and the second touch sensing electrode 1422 are electrically connected through the second via hole 172. The first touch driving electrode 1311 and the second touch driving electrode 1421 are disposed in parallel. The parallel resistance of the first touch driving electrode 1311 and the second touch driving electrode 1421 is smaller than the resistance of the first touch driving electrode 1311. Such first touch driving electrode 1311 and second touch driving electrode 1421 reduce touch resistance and thus improve touch signals. The first touch sensing electrode 1312 and the second touch sensing electrode 1422 are disposed in parallel. The parallel resistance of the first touch sensing electrode 1312 and the second touch sensing electrode 1422 is smaller than the resistance of the first touch sensing electrode 1312. Such first touch sensing electrode 1312 and second touch sensing electrode 1422 reduce touch resistance and thus improve touch signals.
As shown in fig. 4 to 7, the first touch driving electrodes 1311 and the second touch driving electrodes 1421 are electrically connected to each other through the second via holes 172. For example, the row 1, column 1 first touch driving electrode 1311 is electrically connected to the row 1, column 1 second touch driving electrode 1421. The row 1, column 2, first touch driving electrodes 1311 are electrically connected to the row 1, column 2, second touch driving electrodes 1421. The mth row and nth column first touch driving electrodes 1311 are electrically connected to the mth row and nth column second touch driving electrodes 1421. The first touch driving electrodes 1311 and the second touch driving electrodes 1421 in the remaining rows and the remaining columns, and so on. The first touch sensing electrodes 1312 and the second touch sensing electrodes 1422 are electrically connected one by one through the second via holes 172. The first touch sensing electrode 1312 on the 1 st row and the 1 st column is electrically connected to the second touch sensing electrode 1422 on the 1 st row and the 1 st column. The first touch sensing electrode 1312 in the row 1, the column 2 and the second touch sensing electrode 1422 in the row 1, the column 2 are electrically connected. The mth row and nth column first touch sensing electrodes 1312 and the mth row and nth column second touch sensing electrodes 1422 are electrically connected. The first touch sensing electrode 1312 and the second touch sensing electrode 1422 in the remaining rows and the remaining columns, and so on.
As shown in fig. 4, 5A, and 8 to 9, the first touch driving electrode 1311 and the second touch driving electrode 1421 are electrically connected to each other through the second via hole 172. The first touch driving electrodes 1311 in a row are electrically connected two by two in sequence. The second touch driving electrodes 1421 in a row are electrically connected two by two in sequence. For example, the row 1, column 1 first touch driving electrode 1311 and the row 1, column 1 second touch driving electrode 1421 are directly electrically connected. The row 2, column 1, first touch driving electrode 1311 and the row 2, column 1, second touch driving electrode 1421 are not directly electrically connected. However, the row 1, column 1 and first touch driving electrodes 1311 are directly electrically connected to the row 2, column 1 and first touch driving electrodes 1311. The row 1, column 1, second touch driving electrode 1421 is directly electrically connected to the row 2, column 1, second touch driving electrode 1421. Thus, the row 2, column 1, first touch driving electrode 1311 is electrically connected to the row 2, column 1, second touch driving electrode 1421 through the row 1, column 1, first touch driving electrode 1311 and the row 1, column 1, second touch driving electrode 1421.
As shown in fig. 4, 5A, and 8 to 9, the first touch sensing electrode 1312 and the second touch sensing electrode 1422 are electrically connected to each other through the second via hole 172. The first touch sensing electrodes 1312 in each row are electrically connected two by two. The second touch sensing electrodes 1422 in a row are electrically connected two by two in sequence. For example, the first touch sensing electrode 1312 in the row 1, the column 1 and the second touch sensing electrode 1422 in the row 1, the column 1 are directly and electrically connected. The first touch sensing electrode 1312 on the row 1, the column 2 and the second touch sensing electrode 1422 on the row 1, the column 2 are not directly electrically connected. However, the first touch sensing electrode 1312 in the row 1, the column 1 and the first touch sensing electrode 1312 in the row 1, the column 2 are directly and electrically connected. The row 1, column 1, second touch sensing electrode 1422 is directly electrically connected to the row 1, column 2, second touch sensing electrode 1422. Thus, the row 1, column 2 first touch sensing electrode 1312 is electrically connected to the row 1, column 2 second touch sensing electrode 1422 through the row 1, column 1 first touch sensing electrode 1312 and the row 1, column 1 second touch sensing electrode 1422.
As shown in fig. 5A, the adjacent second touch driving electrodes 1421 are electrically connected to each other by a touch electrode line. The adjacent second touch sensing electrodes 1422 are electrically connected to each other by a touch electrode line. A row of second touch driving electrodes 1421 is electrically connected to the first touch driving electrodes 1311 through a second via hole 172. The row of second touch sensing electrodes 1422 is electrically connected to the first touch sensing electrode 1312 through a second via hole 172. This reduces the second via holes 172 between the second touch driving electrode 1421 and the first touch driving electrode 1311 and between the second touch sensing electrode 1422 and the first touch sensing electrode 1312. The manufacturing process of the touch display panel 1 reduces the punching process. The manufacturing process of the touch display panel 1 is simplified.
As shown in fig. 5B, the adjacent second touch driving electrodes 1421 are not electrically connected to each other. The adjacent second touch sensing electrodes 1422 are not electrically connected to each other. The first touch driving electrode 1311 and the second touch driving electrode 1421 are electrically connected through the second via hole 172. The first touch sensing electrode 1312 and the second touch sensing electrode 1422 are electrically connected through the second via hole 172. This omits connection lines between adjacent second touch driving electrodes 1421 and between adjacent second touch sensing electrodes 1422. Accordingly, the film layers of the second touch driving electrode 1421 and the second touch sensing electrode 1422 become thinner.
As shown in fig. 4 to 9, the first touch electrode 131 includes a plurality of touch driving electrodes 1311 arranged in a matrix and a plurality of touch sensing electrodes 1312 arranged in a matrix, and adjacent touch driving electrodes 1311 in the same matrix row are electrically connected; the adjacent touch sensing electrodes 1312 in the same matrix column are electrically connected; the vertical projection of the first shielding electrode 1411 on the cover plate 12 is located between the adjacent vertical projections of the first touch electrode 131 and the second touch electrode 142 on the cover plate 12.
The plurality of first touch driving electrodes 1311 are arranged in a matrix. The rows of first touch driving electrodes 1311 sequentially receive the touch driving signals. The first touch sensing electrodes 1312 are arranged in a matrix. The rows of first touch sensing electrodes 1312 sequentially feed back touch sensing signals. The adjacent first touch driving electrodes 1311 in the same matrix row are electrically connected. The first touch driving electrodes 1311 in the same matrix row receive touch driving signals through the same line. The adjacent first touch sensing electrodes 1312 in the same matrix column are electrically connected. The first touch sensing electrodes 1312 in the same matrix column feed back touch sensing signals through the same line. The projection of the first shielding electrode 1411 on the cover plate 12 is located between the adjacent projections of the first touch driving electrode 1311 and the first touch sensing electrode 1312 on the cover plate 12. The projections of the first touch driving electrode 1311 and the second touch driving electrode 1421 on the cover 12 coincide. The projections of the first touch sensing electrode 1312 and the second touch sensing electrode 1422 on the cover 12 are overlapped. The first shielding electrode 1411 is located between the adjacent second touch driving electrode 1421 and the second touch sensing electrode 1422. The first shielding electrode 1411 fully utilizes a space between the second touch driving electrode 1421 and the second touch sensing electrode 1422 to achieve a shielding function.
As shown in fig. 5A to 9, both the shielding electrode 141 and the second touch electrode 142 employ a transparent conductive oxide or a mesh-shaped metal, where the mesh-shaped metal means that the second touch electrode 142 is composed of a mesh-shaped metal, which reduces the influence on transmittance.
The shielding electrode 141 and the second touch electrode 142 are both made of transparent conductive oxide or mesh-shaped metal. The light of the display panel 11 may pass through the spaces in the transparent conductive oxide or the mesh-shaped metal. Accordingly, light of the display panel 11 can transmit through the shielding electrode 141 and the second touch electrode 142. Such a shielding electrode 141 and the second touch electrode 142 ensure normal display of the display panel 11.
As shown in fig. 5A to 9, the touch display panel 1 further includes a second touch electrode 142; the second touch electrode 142 and the shielding electrode 141 are made of different materials; the second touch electrode 142 is disposed corresponding to the first touch electrode 131; the second touch electrode 142 is electrically connected to the first touch electrode 131.
The second touch electrode 142 and the shielding electrode 141 are made of different materials. For example, the second touch electrode 142 is made of a transparent conductive oxide, and the shielding electrode 141 is made of a metal material, and the shielding electrode is formed in a mesh shape as a whole, so that transmittance is not affected. The light transmission performance of the transparent conductive oxide is superior to that of metal. The conductive properties of the metal are superior to those of the transparent conductive oxide. The light of the display panel 11 is easy to exit through the second touch electrode 142 of the transparent conductive oxide. The metallic shield electrode 141 has a uniform shield potential and realizes excellent shielding performance. The second touch electrode 142 is disposed corresponding to the first touch electrode 131; the second touch electrode 142 is electrically connected to the first touch electrode 131. The second touch electrode 142 is disposed in parallel with the first touch electrode 131. The parallel resistance of the second touch electrode 142 and the first touch electrode 131 is smaller than the resistance of the first touch electrode 131. Such first touch electrode 131 and second touch electrode 142 reduce touch resistance and thus improve touch signals.
As shown in fig. 2, 5A, and 5B, shield electrode 141 further includes a second shield electrode 1412; the second shielding electrode 1412 is disposed along the edge of the display area of the touch display panel 1.
As shown in fig. 2, 5A, 5B, the width of second shield electrode 1412 is greater than the width of first shield electrode 1411.
The width of second shield electrode 1412 is greater than the width of first shield electrode 1411. The width of second shield electrode 1412 becomes larger. The area of the second shield electrode 1412 becomes larger. The area of shield electrode 141 is equal to the sum of the areas of second shield electrode 1412 and first shield electrode 1411. The area of the shielding electrode 141 becomes large. The shielding effect of the shielding electrode 141 is better.
As shown in fig. 2, 5A and 5B, a distance between the shielding electrode 141 and the second touch electrode 142 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers.
In one aspect, the distance between the shielding electrode 141 and the second touch electrode 142 is greater than or equal to 1 μm. The shielding electrode 141 is electrically insulated from the second touch electrode 142. On the other hand, the distance between the shielding electrode 141 and the second touch electrode 142 is less than or equal to 10 μm. The shielding electrode 141 and the second touch electrode 142 respectively implement a shielding function and a touch function by making full use of the space of the conductive layer 14.
Fig. 10 is a schematic top view of a conductive layer in a touch display panel according to another embodiment of the disclosure.
As shown in fig. 3 and 10, the pattern of the second touch electrode 142 has a wavy edge.
The pattern of the second touch electrode 142 has a wavy edge. The light of the display panel 11 is imaged through the wavy edge of the second touch electrode 142. The image of the display panel 11 does not show the wavy edge of the second touch electrode 142. The wavy edge of the second touch electrode 142 does not affect the image of the display panel 11. The wavy edge of the second touch electrode 142 is easily formed through a patterning process. The wavy edge of the second touch electrode 142 replaces the straight edge without increasing the cost.
As shown in fig. 6 to 9, the touch display panel 1 further includes a third insulating layer 163; the third insulating layer 163 is located between the display panel 11 and the conductive layer 14; the third insulating layer 163 covers the display panel 11.
As shown in fig. 6 to 9, optionally, the first touch driving electrode 1311 and the first touch sensing electrode 1312 and the touch electrode line connected between the first touch sensing electrodes 1312 are disposed in the same layer, and the touch driving line connected to the first touch driving electrode 1311 is disposed in a different layer, so that the thickness of the touch electrode can be reduced and the manufacturing process of the touch electrode can be reduced.
The third insulating layer 163 is located between the display panel 11 and the conductive layer 14. The third insulating layer 163 electrically insulates the display panel 11 from the conductive layer 14. The third insulating layer 163 covers the display panel 11. The touch electrode layer 13 is located on a side of the second insulating layer 162 away from the display panel 11. The second insulating layer 162 prevents the electric signal of the display panel 11 from interfering with the electric signal of the touch electrode layer 13.
FIG. 11 is a schematic top view of another touch display panel according to an embodiment of the invention; fig. 12 is a schematic cross-sectional view of a display panel in another touch display panel according to another embodiment of the invention.
As shown in fig. 3, 11 and 12, the touch display panel 1 further includes an integrated circuit 18; the display panel 11 includes an organic light emitting layer 19; an integrated circuit 18 is used to drive the organic light emitting layer 19 and the touch electrode layer 13.
In the touch display panel 1, the shielding electrode 141 prevents the electric signal of the display panel 11 and the electric signal of the touch electrode layer 13 from interfering with each other. Here, the processing of the electric signal of the touch electrode layer 13 without using the plurality of integrated circuits 18 eliminates the interference of the electric signal of the display panel 11. One integrated circuit 18 may drive the organic light emitting layer 19 and the touch electrode layer 13. Such a touch display panel 1 saves space on the integrated circuit 18.
Fig. 13 is a schematic top view of a touch display device according to an embodiment of the invention.
As shown in fig. 13, the touch display device 2 includes a touch display panel 1.
The touch display device 2 utilizes the touch display panel 1 to display and touch, for example, a wearable device such as a smart watch. As described above, the touch display panel 1 is not described in detail.
In summary, the present invention provides a touch display panel and a touch display device. The touch display panel comprises a display panel, a cover plate, a touch electrode layer, a conductive layer and a grounding electrode; the cover plate is positioned on the display panel; the touch electrode layer is positioned between the display panel and the cover plate; the conductive layer is positioned between the display panel and the touch electrode layer; the conductive layer includes a shield electrode; the shielding electrode is electrically connected with the grounding electrode; the touch electrode layer comprises a plurality of first touch electrodes arranged in a matrix manner; the orthographic projection of the shielding electrode on the cover plate is beyond the orthographic projection of the first touch electrode on the cover plate. The touch display device comprises a touch display panel. In the present invention, the potential of the shield electrode is equal to the ground potential. The shielding electrode prevents the electric signal of the display panel and the electric signal of the touch electrode layer from interfering with each other. The light of the display panel passes through the shielding electrode. The shield electrode is only a part of the conductive layer. The parts of the conductive layer other than the shielding electrode may perform other functions. Such a conductive layer fulfils more functions.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A touch display panel is characterized by comprising a display panel, a cover plate, a touch electrode layer, a conductive layer and a grounding electrode;
the cover plate is positioned on the display panel;
the touch electrode layer is positioned between the display panel and the cover plate;
the conductive layer is positioned between the display panel and the touch electrode layer;
the conductive layer comprises a shield electrode;
the shielding electrode is electrically connected with the grounding electrode;
the touch electrode layer comprises a plurality of first touch electrodes arranged in a matrix;
the orthographic projection of the shielding electrode on the cover plate is out of the orthographic projection of the first touch electrode on the cover plate.
2. The touch display panel according to claim 1, wherein the conductive layer further comprises a plurality of second touch electrodes arranged in a matrix, the second touch electrodes are disposed corresponding to the first touch electrodes, and the second touch electrodes are electrically connected to the first touch electrodes;
the shielding electrodes comprise first shielding electrodes, and the first shielding electrodes are located between the adjacent second touch electrodes.
3. The touch display panel according to claim 2, further comprising a first insulating layer and a first via hole;
the first insulating layer is positioned between the conducting layer and the touch electrode layer;
the first via hole penetrates through the first insulating layer;
when the first touch electrode is a self-contained touch electrode;
the projection of the first touch electrode on the cover plate covers the projection of the second touch electrode on the cover plate, and the first touch electrode and the second touch electrode are electrically connected one by one through the first via hole.
4. The touch display panel according to claim 2, further comprising a second insulating layer and a second via hole;
the second insulating layer is positioned between the conductive layer and the touch electrode layer;
the second via hole penetrates through the second insulating layer;
the first touch control electrode comprises a first touch control driving electrode and a first touch control induction electrode;
the second touch control electrode comprises a second touch control driving electrode and a second touch control induction electrode;
the first touch drive electrode is electrically connected with the second touch electrode through the second via hole;
the first touch sensing electrode is electrically connected with the second touch electrode through the second via hole.
5. The touch display panel according to claim 4, wherein the first touch electrode comprises a plurality of touch driving electrodes arranged in a matrix and a plurality of touch sensing electrodes arranged in a matrix, and adjacent touch driving electrodes in a same matrix row are electrically connected; adjacent touch induction electrodes in the same matrix array are electrically connected;
the vertical projection of the first shielding electrode on the cover plate is positioned between the vertical projections of the first touch electrode and the second touch electrode which are adjacent to each other on the cover plate.
6. The touch display panel according to any one of claims 2 to 5, wherein the shielding electrode and the second touch electrode are both made of a transparent conductive oxide or a metal in a mesh shape.
7. The touch display panel according to claim 1, further comprising a second touch electrode;
the second touch electrode and the shielding electrode are made of different materials;
the second touch electrode is arranged corresponding to the first touch electrode;
the second touch electrode is electrically connected with the first touch electrode.
8. The touch display panel of claim 2, wherein the shielding electrode further comprises a second shielding electrode;
the second shielding electrode is arranged along the edge of the display area of the touch display panel.
9. The touch display panel of claim 8, wherein the width of the second shielding electrode is greater than the width of the first shielding electrode.
10. The touch display panel according to claim 2, wherein a distance between the shielding electrode and the second touch electrode is greater than or equal to 1 micron and less than or equal to 10 microns.
11. The touch display panel according to claim 2, wherein the pattern of the second touch electrode has a wavy edge.
12. The touch display panel according to claim 1, further comprising a third insulating layer;
the third insulating layer is positioned between the display panel and the conducting layer;
the third insulating layer covers the display panel.
13. The touch display panel of claim 1, further comprising an integrated circuit;
the display panel includes an organic light emitting layer;
and the integrated circuit is used for driving the organic light-emitting layer and the touch electrode layer.
14. A touch display device characterized by comprising the touch display panel according to any one of claims 1 to 13.
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| CN202010005141.8A CN111045553B (en) | 2020-01-03 | 2020-01-03 | Touch display panel and touch display device |
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| CN202010005141.8A CN111045553B (en) | 2020-01-03 | 2020-01-03 | Touch display panel and touch display device |
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| CN112506373A (en) * | 2020-11-30 | 2021-03-16 | 合肥鑫晟光电科技有限公司 | Touch substrate, preparation method thereof and display device |
| CN117751442A (en) * | 2022-07-12 | 2024-03-22 | 京东方科技集团股份有限公司 | Touch display panel and electronic product |
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| CN104699311A (en) * | 2015-04-01 | 2015-06-10 | 上海天马微电子有限公司 | Display panel and display device |
| CN105353921A (en) * | 2015-12-08 | 2016-02-24 | 上海天马微电子有限公司 | Integrated touch display panel and touch display device |
| CN106843591A (en) * | 2017-02-16 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of contact panel, its preparation method and touch control display apparatus |
| CN107015691A (en) * | 2016-11-11 | 2017-08-04 | 友达光电股份有限公司 | Touch display panel with pressure sensor |
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| US9298327B2 (en) * | 2013-12-09 | 2016-03-29 | Atmel Corporation | Integrated shielding in touch sensors |
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| CN104699311A (en) * | 2015-04-01 | 2015-06-10 | 上海天马微电子有限公司 | Display panel and display device |
| CN105353921A (en) * | 2015-12-08 | 2016-02-24 | 上海天马微电子有限公司 | Integrated touch display panel and touch display device |
| CN107015691A (en) * | 2016-11-11 | 2017-08-04 | 友达光电股份有限公司 | Touch display panel with pressure sensor |
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