CN114327163B - Touch display panel and touch display device - Google Patents
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- CN114327163B CN114327163B CN202111659887.1A CN202111659887A CN114327163B CN 114327163 B CN114327163 B CN 114327163B CN 202111659887 A CN202111659887 A CN 202111659887A CN 114327163 B CN114327163 B CN 114327163B
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Abstract
The invention discloses a touch display panel and a touch display device, wherein the touch display panel comprises: a display panel and a touch panel positioned on the light emitting side of the display panel; the display panel comprises a display area, wherein the display area comprises a plurality of pixel opening areas; the touch panel comprises a touch structure, the touch structure comprises a touch grid, the vertical projection of the touch grid on the plane of the display panel and in the pixel opening area is designed to be a continuous grid, the light leakage problem of gaps (or slits) between adjacent touch electrodes is eliminated in the light emergent direction of the display panel, and the light leakage of the pixel opening area of the display panel, which is caused by different shielding transmittance of the gaps (or slits), is eliminated to generate bright lines, so that the visual experience and the display effect of the touch display panel are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of touch display, in particular to a touch display panel and a touch display device.
Background
With the rapid progress of display technology, touch display panel technology as the core of display devices has also been greatly advanced.
For the display panel in the prior art, a problem of bright lines in gaps exists between two adjacent touch electrodes, and the display effect is affected.
Disclosure of Invention
The invention provides a touch display panel and a touch display device, wherein the vertical projection of a touch grid on a plane of the display panel and in a pixel opening area is designed to be a continuous grid, so that the problem of light leakage of gaps (or slits) between adjacent touch electrodes in the light emergent direction of the display panel is solved, and the problem of light leakage in the pixel opening area of the display panel, which is caused by different shielding transmittance of the gaps (or slits), is eliminated, so that the visual experience and the display effect of the touch display panel are improved.
In a first aspect, an embodiment of the present invention provides a touch display panel, including: a display panel and a touch panel positioned on the light emitting side of the display panel;
the display panel comprises a display area, wherein the display area comprises a plurality of pixel opening areas;
the touch panel comprises a touch structure, the touch structure comprises a touch grid, and the vertical projection of the touch grid on the plane where the display panel is located and in the pixel opening area is a continuous grid.
In a second aspect, an embodiment of the present invention further provides a touch display device, where the touch display device includes the touch display panel provided in the first aspect.
The touch display panel provided by the embodiment of the invention comprises: a display panel and a touch panel positioned on the light emitting side of the display panel; the display panel comprises a display area, wherein the display area comprises a plurality of pixel opening areas; the touch panel comprises a touch structure, the touch structure comprises a touch grid, the vertical projection of the touch grid on the plane of the display panel and in the pixel opening area is designed to be a continuous grid, the light leakage problem of gaps (or slits) between adjacent touch electrodes is eliminated in the light emergent direction of the display panel, and the light leakage of the pixel opening area of the display panel, which is caused by different shielding transmittance of the gaps (or slits), is eliminated to generate bright lines, so that the visual experience and the display effect of the touch display panel are improved.
Drawings
Fig. 1 is a schematic plan view of a touch display panel in the related art;
FIG. 2 is a schematic cross-sectional view taken along the direction AA' of FIG. 1;
fig. 3 is a schematic perspective view of a touch display panel according to an embodiment of the invention;
fig. 4 is a schematic plan view of a touch display panel according to an embodiment of the present invention;
fig. 5 is a schematic plan view of a touch display panel according to an embodiment of the present invention;
fig. 6 is a schematic plan view of another touch display panel according to an embodiment of the invention;
fig. 7 is a schematic plan view of another touch display panel according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view taken along the direction BB' in FIG. 4;
FIG. 9 is another cross-sectional view taken along the direction BB' in FIG. 4;
FIG. 10 is a schematic cross-sectional view taken along the direction CC' of FIG. 5;
FIG. 11 is another cross-sectional schematic view taken along DD' in FIG. 5;
FIG. 12 is another cross-sectional view taken along the direction EE' in FIG. 5;
FIG. 13 is another cross-sectional schematic view taken along the direction FF' of FIG. 5;
FIG. 14 is a schematic cross-sectional view taken along bb' in FIG. 6;
FIG. 15 is another cross-sectional schematic view taken along the bb' direction of FIG. 6;
fig. 16 is a schematic plan view of a touch display panel according to an embodiment of the present invention;
FIG. 17 is a schematic cross-sectional view taken along the bbbb' direction of FIG. 16;
FIG. 18 is another cross-sectional schematic view taken along the bbbb' direction of FIG. 16;
FIG. 19 is a schematic cross-sectional view taken along the direction MM' in FIG. 7;
FIG. 20 is another cross-sectional schematic view along the direction NN' in FIG. 7;
FIG. 21 is another cross-sectional view taken along KK' in FIG. 7;
fig. 22 is a schematic structural diagram of a touch display device according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic plan view of a touch display panel according to the related art, and fig. 2 is a schematic cross-sectional view along the AA' direction in fig. 1. As shown in fig. 1 and 2, the touch display panel 100 includes a display panel 10 and a touch panel 20 located on a light emitting side of the display panel 10, where the touch panel 20 includes a plurality of touch electrodes 201, and a width L is about several micrometers due to a gap (or a slit) between two adjacent touch electrodes 201, as shown by an arrow O in a virtual frame in fig. 1, fig. 1 may be a self-contained touch display panel or a mutual-contained touch display panel, which is not particularly limited herein, and the gaps (or slits) between adjacent touch electrodes 201 are regularly arranged, and when the display panel and the touch panel are combined, the gaps (or slits) are present to cover a light emitting opening area of the display panel and light leakage occurs. Generally, the touch electrode 201 is an opaque metal layer, and due to the different transmittance of the metal layer and the gap (or slit), a corresponding bright line appears at a position of a light-emitting opening region right above the gap (or slit) between the adjacent touch electrodes 201, and the touch electrodes 201 are densely and regularly arranged, so that the formed bright lines are more and serious, resulting in poor visual experience of the display panel and seriously affecting the display effect of the touch display panel.
Based on the technical problems, the inventor further researches the technical scheme of the embodiment of the invention. Specifically, an embodiment of the present invention provides a touch display panel, where the touch display panel includes a display panel and a touch panel located at a light emitting side of the display panel; the display panel comprises a display area, wherein the display area comprises a plurality of pixel opening areas; the touch panel comprises a touch structure, the touch structure comprises touch grids, and the vertical projection of the touch grids on the plane of the display panel and in the pixel opening area is continuous grids.
By adopting the technical scheme, in the touch panel, the touch structure comprises the touch grid, the vertical projection of the touch grid on the plane where the display panel is located and in the pixel opening area is designed to be a continuous grid, the light leakage problem of gaps (or slits) between adjacent touch electrodes is eliminated in the light emitting direction of the display panel, the light leakage of the pixel opening area of the display panel, which is caused by different shielding transmittance of the gaps (or slits), is eliminated, and the bright line is generated, so that the visual experience and the display effect of the touch display panel are improved.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 3 is a schematic perspective view of a touch display panel according to an embodiment of the invention; fig. 4 is a schematic plan view of a touch display panel according to an embodiment of the present invention; fig. 5 is a schematic plan view of a touch display panel according to an embodiment of the present invention; fig. 6 is a schematic plan view of another touch display panel according to an embodiment of the invention; fig. 7 is a schematic plan view of another touch display panel according to an embodiment of the invention. Referring to fig. 3 to fig. 7, a touch display panel 200 according to an embodiment of the present invention includes a display panel 1 and a touch panel 2 located on a light emitting side of the display panel 1; the display panel 1 includes a display area 11, and the display area 11 includes a plurality of pixel opening areas (not shown in the drawings); the touch panel 2 includes a touch structure 21, the touch structure 21 includes a touch grid 211, and a vertical projection of the touch grid 211 on a plane of the display panel 1 and in a pixel opening area is a continuous grid.
As shown in fig. 3 to 7, the touch display panel 200 according to the embodiment of the invention includes a display panel 1 and a touch panel 2 positioned on the light emitting side of the display panel. The display panel 1 includes a display area 11, where the display area 11 is used for displaying a picture to be displayed, the display area 11 includes a plurality of pixel opening areas (not shown in the figure), and the pixel opening areas are light-emitting areas of each sub-pixel in the display area 11, and may be set corresponding to the hollowed-out areas of the touch grid 211. The display panel includes an organic light emitting display panel as an example, and the pixel opening region may be a region defined by the pixel defining layer, such that the anode layer, the organic light emitting material, and the cathode layer defined by the pixel opening region form a light emitting element for light emitting display by filling the organic light emitting material in the pixel opening region. Each light-emitting element can emit light rays with different colors according to different organic light-emitting materials, so that each light-emitting element forms a sub-pixel, and a plurality of sub-pixels jointly display pictures. The organic light emitting display panel further includes a driving circuit between the substrate and the organic light emitting element, the driving circuit may include a plurality of thin film transistors and capacitors, for example, a 7T1C circuit, the driving circuit drives the organic light emitting element to emit light, and the embodiment of the present invention is not limited to the specific form of the driving circuit.
For example, the touch panel 2 may be a self-capacitance type touch panel or a mutual capacitance type touch panel, where the touch panel 2 includes a touch structure 21, the touch structure 21 is used for a touch operation of a corresponding user, specifically, the touch structure 21 includes a touch grid 211, and the touch grid 211 includes a metal material with better conductivity. By designing the touch grid 211, for example, on the basis of the existing film structure, a continuous grid structure is realized by increasing the area of the touch grid 211; or by adding a film structure of shielding gaps (or slits) above or below the touch grid 211, the vertical projection of the touch grid 211 on the plane of the display panel 1 and in the pixel opening area is a continuous grid. Wherein, the continuous grid refers to the continuous grid which is not provided with intervals or slits along the arrangement direction of the touch grid in a top view, such as the intervals or slits along the first direction (vertical Y direction) and the second direction (horizontal X direction), and the continuous grid does not refer to the continuous grid which is connected into a complete whole. In the light emitting direction of the display panel 1, since the gaps (or slits) between the adjacent touch electrode structures are blocked, the problem of bright lines generated in the pixel opening area of the display panel 1 caused by light leakage of the gaps (or slits) can be improved until the problem of bright lines is completely eliminated, so that the visual experience and the display effect of the touch display panel are improved.
It should be noted that, the touch display panel provided in this embodiment further includes other film layers, and the display function of the touch display panel is realized by the combined action, which is not described in one-to-one development.
In summary, by setting the touch electrode structure of the touch panel, the touch structure includes a touch grid, and the vertical projection of the touch grid on the plane of the display panel and in the pixel opening area is designed to be a continuous grid, so that the gap (or slit) between adjacent touch electrodes is shielded in the light emitting direction of the display panel, and the problem that bright lines are generated in the pixel opening area of the display panel due to light leakage of the gap (or slit) is solved, thereby improving the visual experience and display effect of the touch display panel.
FIG. 8 is a schematic cross-sectional view taken along the direction BB' in FIG. 4; fig. 9 is another schematic cross-sectional view along the direction BB' in fig. 4. Optionally, as shown in fig. 4, 8 and 9, the touch structure 21 includes a touch electrode 211, where the touch electrode 211 includes a first touch electrode 2111 and a second touch electrode 2112 adjacent and insulated along a first direction (Y direction in the drawing); the first direction is parallel to the plane of the display panel 1; the first touch electrode 2111 and the second touch electrode 2112 are arranged in different layers; the first touch electrode 2111 includes a first touch grid, and the second touch electrode 2112 includes a second touch grid, where a vertical projection of the first touch grid on a plane of the display panel 1 and in the pixel opening area is connected to a vertical projection of the second touch grid on the plane of the display panel 1 and in the pixel opening area.
As illustrated in fig. 4, 8 and 9, the touch panel 1 includes a touch display panel with different layers of touch electrodes, the touch structure 21 includes a touch electrode 211, the touch electrode 211 includes a first touch electrode 2111 and a second touch electrode 2112 adjacent and insulated along a first direction (Y direction in the drawing), the first touch electrode 2111 and the second touch electrode 2112 each include a touch electrode of a self-contained touch panel, and the first touch electrode 2111 and the second touch electrode 2112 are different layers to form a self-contained touch panel with different layers; the first touch electrode 2111 includes a touch driving electrode (T) of a capacitive touch panel X ) The second touch electrode 2112 includesTouch sensing electrode (R) of mutual capacitance type touch panel X ) And forming the mutual capacitance type touch panel with different layers. The touch electrode 211 is set to be in a metal grid structure, on the premise of ensuring touch performance and touch display function, shielding of the touch electrode 211 to light emitted by a pixel opening area in the display area 11 is reduced, the first touch electrode 2111 is further set to comprise a first touch grid, the second touch electrode 2112 comprises a second touch grid, the first touch grid and the second touch grid are adjacent and insulated along the Y direction in the figure, and a longitudinal shielding effect is achieved by increasing the area of the first touch grid close to one side of the second touch grid or increasing the area of the second touch grid close to one side of the first touch grid, so that vertical projection of the first touch grid on the plane of the display panel 1 and in the pixel opening area is connected with vertical projection of the second touch grid on the plane of the display panel 1 and in the pixel opening area, as shown in fig. 8 and 9. The connection includes the case that the projections overlap and the projections contact but do not overlap, that is, the space (or slit) between the adjacent first touch electrode 2111 and the second touch electrode 2112 is blocked, so that the problem that bright lines are generated in the pixel opening area of the display panel due to light leakage of the space (or slit) is solved.
On the basis of the above embodiment, as shown in fig. 4 and 8, alternatively, the vertical projection of the first touch grid on the plane of the display panel 1 and in the pixel opening area overlaps the vertical projection of the second touch grid on the plane of the display panel 1 and in the pixel opening area. As shown in fig. 8, along the Y direction in the figure, by increasing the area of the first touch grid near the second touch grid or increasing the area of the second touch grid near the first touch grid, the vertical projection overlapping area is increased, so that the problem that gaps are caused by manufacturing process errors or bright lines appear when the touch display panel is watched along different angles can be avoided, and the visual imaging effect of the touch display panel is ensured.
FIG. 10 is a schematic cross-sectional view taken along the direction CC' of FIG. 5; FIG. 11 is another cross-sectional schematic view taken along DD' in FIG. 5; FIG. 12 is another cross-sectional view taken along the direction EE' in FIG. 5; fig. 13 is another schematic cross-sectional view along FF' in fig. 5. Based on the above embodiments, referring to fig. 5 and fig. 10-13, optionally, the first touch electrode 2111 includes a touch driving electrode (Tx), and the second touch electrode 2112 includes a touch sensing electrode (Rx); the first touch electrode 2111 includes a first electrode portion 21111 and a first connection portion 21112 between two adjacent first electrode portions 21111, the first electrode portion 21111 including a first touch grid; the second touch electrode 2112 includes a second electrode portion 21121 and a second connection portion 21122 between two adjacent second electrode portions 21121, the second electrode portion 21122 including a second touch grid; the first electrode portion 21111 is provided in the same layer as the first connection portion 21112, as shown in fig. 5 and 10; the second electrode portion 21121 is provided in the same layer as the second connection portion 21122, as shown in fig. 5 and 11.
As illustrated in fig. 5 and fig. 10-13, the touch panel 1 includes a capacitive touch panel, the first touch electrode 2111 includes a touch driving electrode (Tx), the second touch electrode 2112 includes a touch sensing electrode (Rx), the touch driving electrode (Tx) is used for transmitting a touch driving signal, the touch sensing electrode (Rx) is used for transmitting a touch sensing signal, and touch display can be implemented based on a capacitive touch principle. The first touch electrode 2111 includes a first electrode portion 21111 and a first connection portion 21112 between two adjacent first electrode portions 21111, the second touch electrode 2112 includes a second electrode portion 21121 and a second connection portion 21122 between two adjacent second electrode portions 21121, the first electrode portion 21111 includes a first grid-shaped touch grid, the second electrode portion 21122 includes a second touch grid, a pixel opening area is disposed in a gap between the first touch grid and the second touch grid for displaying light, the first connection portion 21112 and the second connection portion 21122 are in a bridge connection structure, a material of the bridge connection structure includes a metal material with good conductivity, such as Ti/Al/Ti, and electrical conduction between two adjacent first connection portions 21112 and between two adjacent second electrode portions 21122 can be achieved through a bridging action of the first connection portion 21112 and the second connection portion 21122.
On the basis of not increasing the preparation process and the film layer structure, as shown in fig. 5 and 10, the first electrode portion 21111 of the touch driving electrode (Tx) and the first connection portion 21112 may be arranged in the same layer; as shown in fig. 5 and 11, the second electrode portion 21121 and the second connection portion 21122 are arranged in the same layer, so that a film structure in which the touch driving electrode (Tx) is located above the touch sensing electrode (Rx) is realized, and due to the layered arrangement, electrical insulation between the touch electrodes can be realized by increasing the area of the touch driving electrode (Tx), as shown in fig. 12 and 13, or increasing the area of the touch sensing electrode (Rx) (not shown in the drawings), or increasing the area of the touch driving electrode (Tx) and the area of the touch sensing electrode (Rx) (not shown in the drawings) at the same time, so that a vertical projection of the touch driving electrode (Tx) on the plane of the display panel 1 and in which the touch sensing electrode (Rx) is located is in contact with the pixel opening area, for example, the vertical projections overlap, and fig. 10 to 13 are examples of the vertical projection overlap, so that a problem of bright line generated in the pixel opening area of the display panel due to a gap (slit) between adjacent touch electrodes can be improved.
It should be noted that, fig. 5 and fig. 10 to fig. 13 only show an embodiment in which the touch driving electrode (Tx) is located below the touch sensing electrode (Rx) along the light emitting direction of the touch display panel, and the touch driving electrode (Tx) may also be disposed above the touch sensing electrode (Rx), and meanwhile, the area of the touch driving electrode (Tx) may be increased to make the vertical projection meet, which is not shown here.
FIG. 14 is a schematic cross-sectional view taken along bb' in FIG. 6; FIG. 15 is another cross-sectional schematic view taken along the bb' direction of FIG. 6; fig. 16 is a schematic plan view of a touch display panel according to an embodiment of the present invention; FIG. 17 is a schematic cross-sectional view taken along the bbbb' direction of FIG. 16; fig. 18 is another schematic cross-sectional view along the bbbb' direction in fig. 16. Based on the above embodiments, as shown in fig. 6 and fig. 14-18, the touch structure 21 may include a touch electrode 211 and a shielding structure 222; the touch electrode 21 includes a third touch electrode 2113 and a fourth touch electrode 2114 adjacent and insulated from each other in the first direction (shown in the Y direction in the drawing); the first direction is parallel to the plane of the display panel; the third touch electrode 2113 and the fourth touch electrode 2114 are arranged on the same layer; the third touch electrode 2113 includes a third touch grid, the fourth touch electrode 2114 includes a fourth touch grid, and the vertical projection of the third touch grid on the plane of the display panel 1 and in the pixel opening area and the vertical projection of the fourth touch grid on the plane of the display panel 1 and in the pixel opening area are connected with the vertical projection of the shielding structure 222 on the plane of the display panel 1 and in the pixel opening area.
As illustrated in fig. 6 and fig. 14-18, the touch panel 1 includes a mutual capacitive touch display panel and a self-capacitive touch display panel having touch electrodes arranged in the same layer, the touch structure 21 includes the touch electrodes 211 and the shielding structure 222, and optionally, the shielding structure 222 is located on a side of the touch panel 2 close to the display panel 1, and/or the shielding structure 222 is located on a side of the touch panel 2 far from the display panel 1. The third touch electrode 2113 and the fourth touch electrode 2114 are disposed in the same layer, for example, a layer of shielding structure 222 is added above, below or above and below the third touch electrode 2113 and the fourth touch electrode 2114 which are disposed adjacently and in an insulating manner, as shown in fig. 14, 15, 17 and 18, the material of the shielding structure 222 may be the same as the material of the touch electrode, or other shielding materials. In fig. 6, the shielding structure 222 is disposed above the touch electrode 211, and in fig. 16, the shielding structure 222 is disposed below the touch motor 211, which may be referred to as a "hat-shaped" principle for slit shielding.
Alternatively, the shielding structure 222 may be made of metal of an existing film layer in the multiplexed display panel 1, for example, a gate layer of a thin film transistor. The shielding structure 222 shields the gap (or slit) structure in front of the third touch electrode 2113 and the fourth touch electrode 2114, which are adjacently and insulatively arranged, so that the vertical projection of the third touch grid of the third touch electrode 2113 on the plane of the display panel 1 in the pixel opening area and the vertical projection of the fourth touch grid of the fourth touch electrode 2114 on the plane of the display panel 1 in the pixel opening area are connected with the vertical projection of the shielding structure 222 on the plane of the display panel 1 in the pixel opening area. Wherein interfacing includes projection overlap, as shown in fig. 14, 17 and 17; and the case where the projections are in contact but do not overlap, as shown in fig. 15 and 18. The third touch electrode 2113 and the fourth touch electrode 2114 include touch electrodes of a self-contained touch display panel, or touch sensing electrodes (Rx) of a mutual-contained touch display panel are located at touch driving electrodes (Tx), and when the touch structure arranged in the same layer is adopted, the problem that bright lines are generated in the pixel opening area of the display panel due to light leakage of gaps (or slits) between adjacent touch electrodes can be improved by adding a shielding structure.
On the basis of the above embodiment, as shown in fig. 14 and 17, optionally, the vertical projection of the third touch grid on the plane of the display panel 1 and in the pixel opening area and the vertical projection of the fourth touch grid on the plane of the display panel 1 and in the pixel opening area overlap the vertical projection of the shielding structure 222 on the plane of the display panel 1 and in the pixel opening area. Along the Y direction in the figure, by increasing the area of the vertical projection of the shielding structure 222 on the plane where the display panel 1 is located and in the pixel opening area, and further increasing the vertical projection overlapping area, the problem that gaps are caused by manufacturing process errors or bright lines appear when the touch display panel is watched along different angles can be avoided, and the visual imaging effect of the touch display panel is ensured.
FIG. 19 is a schematic cross-sectional view taken along the direction MM' in FIG. 7; FIG. 20 is another cross-sectional schematic view along the direction NN' in FIG. 7; fig. 21 is another schematic cross-sectional view along KK' in fig. 7. Based on the above embodiments, as shown in fig. 7 and fig. 19-22, optionally, the third touch electrode 2113 includes a touch driving electrode (Tx), and the fourth touch electrode 2114 includes a touch sensing electrode (Rx); the third touch electrode 2113 includes a third electrode portion 21131 and a third connection portion 21132 between two adjacent third electrode portions 21131, the third electrode portion 21131 including a third touch grid; the fourth touch electrode 2114 includes a fourth electrode portion 21141 and a fourth connection portion 21142 between two adjacent fourth electrode portions 21141, the fourth electrode portion 21141 including a fourth touch grid; the third electrode portion 21131, the third connection portion 21132, and the fourth electrode portion 21141 are provided in the same layer, and the fourth electrode portion 21141 and the fourth connection portion 21142 are provided in different layers; the shielding structure 222 is provided in the same layer as the fourth connecting portion 21142.
As an example, referring to fig. 7 and fig. 19-22, for example, the touch panel 1 is a mutual capacitive touch panel with touch electrodes arranged on the same layer, the third touch electrode 2113 includes a touch driving electrode (Tx), the fourth touch electrode 2114 includes a touch sensing electrode (Rx), the touch driving electrode (Tx) is used for transmitting a touch driving signal, the touch sensing electrode (Rx) is used for transmitting a touch sensing signal, and adjacent touch driving electrodes (Tx) and touch sensing electrodes (Rx) are electrically insulated from each other, so that touch display can be realized based on the mutual capacitive touch principle. The three touch electrodes 2113 are provided and include a third electrode portion 21131 and a third connection portion 21132 between two adjacent third electrode portions 21131, the fourth touch electrode 2114 includes a fourth electrode portion 21141 and a fourth connection portion 21142 between two adjacent fourth electrode portions 21141, the third electrode portion 21131 includes a third touch grid, the third touch grid is a touch driving signal receiving area, the fourth electrode portion 21141 includes a fourth touch grid, the fourth touch grid is a touch sensing signal receiving area, and a gap between the third touch grid and the fourth touch grid is a pixel opening area for displaying light. The third connection portion 21132 and the fourth connection portion 21142 are bridge connection structures, and materials of the bridge connection structures include metal materials with good conductivity. In the preparation of the touch electrode film layer, the third electrode portion 21131, the third connection portion 21132 of the touch driving electrode (Tx), and the fourth electrode portion 21141 of the touch sensing electrode (Rx) are prepared in the same layer, as shown in fig. 19 and 20, so that the fourth electrode portion 21141 of the touch sensing electrode (Rx) and the fourth connection portion 21142 are arranged in different layers, as shown in fig. 21. On the basis of not increasing the number of film preparation layers, the shielding structure 222 and the fourth connection portion 21142 are prepared in the same layer by utilizing the cross-bridge layer of the fourth connection portion 21142, the shielding structure 222 is added below (as shown in fig. 19) or above a gap between two adjacent third touch electrodes 2113 and fourth touch electrodes 2114, and the vertical projection of the third touch grid of the third touch electrode 2113, the fourth touch grid of the fourth touch electrode 2114 and the shielding structure 222 on the plane of the display panel 1 and in the pixel opening area is continuous grids by utilizing the principle of wearing a hat, so that the problem that bright lines are generated in the pixel opening area of the display panel due to light leakage of gaps (or slits) between the adjacent touch electrodes can be effectively eliminated, and the visual experience and the display effect of the touch display panel are improved.
Optionally, the touch display panel further includes an interlayer insulating layer, where the interlayer insulating layer may be formed by insulating an inorganic layer such as silicon oxide or silicon nitride, for example, for electrical insulation between two adjacent touch electrodes, and further film structures and preparation materials are not listed here.
Alternatively, the display panel 1 includes a liquid crystal display panel, an organic light emitting display panel, or a micro diode display panel. Such as the display panel 1 includes a liquid crystal display panel (Liquid Crystal Display, LCD), an organic light emitting display panel (Organic Light Emitting Diode Display, OLED), a Micro diode display panel (Micro Light Emitting Diode Display, micro LED), a quantum dot light emitting display panel (Quantum Dot Light Emitting Diodes, QLED), and the like.
It should be noted that, on the basis of the above embodiment, in order to reduce the formation of grid lines by the non-display area touch control grid, and affect the overall visual effect, a shielding structure may be added in the touch control structure design of the non-display area by adopting the structure design of the longitudinal shielding effect and the principle of wearing a hat, so as to avoid the problem of grid lines.
In summary, the touch display panel provided by the embodiment of the invention can adopt the structural design of the longitudinal shielding effect and the principle of wearing a hat to achieve the effect of eliminating the problem of bright lines in the pixel opening area of the display panel caused by the light leakage of the gap (or slit) between adjacent touch electrodes, so as to play a role in improving the visual experience and display effect of the touch display panel, as long as the gap (or clearance) exists between two adjacent touch electrode metals to cause different transmittance and light leakage to cause the problem of bright lines in the pixel opening area of the display panel.
Based on the same inventive concept, the embodiment of the invention also provides a touch display device. Fig. 22 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, and as shown in fig. 22, the touch display device includes any one of the touch display panels provided in the foregoing embodiments. As shown in fig. 22, the touch display device 300 includes a touch display panel 200. Therefore, the touch display device also has the advantages of the touch display panel in the above embodiment, and the same points can be understood by referring to the explanation of the touch display panel, and the description thereof will not be repeated.
The touch display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 22, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., which is not particularly limited by the embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (4)
1. The touch display panel is characterized by comprising a display panel and a touch panel positioned on the light emitting side of the display panel;
the display panel comprises a display area, wherein the display area comprises a plurality of pixel opening areas;
the touch panel comprises a touch structure, the touch structure comprises a touch grid, and the vertical projection of the touch grid on the plane of the display panel and in the pixel opening area is a continuous grid;
the touch structure comprises touch electrodes, wherein the touch electrodes comprise first touch electrodes and second touch electrodes which are adjacent and insulated along a first direction; the first direction is parallel to the plane where the display panel is located;
the first touch electrode and the second touch electrode are arranged in different layers;
the first touch electrode comprises a first touch grid, the second touch electrode comprises a second touch grid, and the vertical projection of the first touch grid on the plane of the display panel and in the pixel opening area is connected with the vertical projection of the second touch grid on the plane of the display panel and in the pixel opening area;
the first touch electrode comprises a touch driving electrode, and the second touch electrode comprises a touch sensing electrode;
the first touch electrode comprises a first electrode part and a first connecting part between two adjacent first electrode parts, and the first electrode part comprises the first touch grid;
the second touch electrode comprises a second electrode part and a second connecting part between two adjacent second electrode parts, and the second electrode part comprises the second touch grid;
the first electrode part and the first connecting part are arranged in the same layer, and the second electrode part and the second connecting part are arranged in the same layer.
2. The touch display panel of claim 1, wherein a vertical projection of the first touch grid on the plane of the display panel and at the pixel opening area overlaps a vertical projection of the second touch grid on the plane of the display panel and at the pixel opening area.
3. The touch display panel according to claim 1, wherein the display panel comprises a liquid crystal display panel, an organic light emitting display panel, or a micro diode display panel.
4. A touch display device comprising the touch display panel of any one of claims 1-3.
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| CN202111659887.1A CN114327163B (en) | 2021-12-30 | 2021-12-30 | Touch display panel and touch display device |
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| CN202111659887.1A CN114327163B (en) | 2021-12-30 | 2021-12-30 | Touch display panel and touch display device |
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| CN114327163B true CN114327163B (en) | 2024-02-02 |
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