CN113296637A - Touch substrate and display device - Google Patents
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- CN113296637A CN113296637A CN202110644837.XA CN202110644837A CN113296637A CN 113296637 A CN113296637 A CN 113296637A CN 202110644837 A CN202110644837 A CN 202110644837A CN 113296637 A CN113296637 A CN 113296637A
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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
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Position Input By Displaying (AREA)
Abstract
The application discloses a touch substrate and a display device, wherein the touch substrate comprises a display structure layer and a touch electrode layer, the display structure layer comprises a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels and a pixel defining layer, the pixel defining layer comprises a plurality of openings, and each first sub-pixel, each second sub-pixel and each third sub-pixel respectively correspond to one opening; the touch electrode layer comprises a first touch electrode and a second touch electrode which are insulated from each other, the touch electrodes respectively comprise a plurality of grid patterns, each grid pattern is a roughly rectangular structure or a square structure formed by grid lines, the grid lines are formed between adjacent openings of the pixel defining layer, and at least part of adjacent grid lines arranged in the same direction are arranged in a staggered mode. Adopt the scheme of this application, avoided the straight extension that the gridlines of a plurality of grids constitute in whole display area, and then can avoid the appearance of macroscopic texture, promoted display effect.
Description
Technical Field
The present disclosure generally relates to the field of display technologies, and more particularly, to an OLED (organic light emitting diode) display technology, and more particularly, to a touch substrate and a display device.
Background
The FMLOC technology forms a touch circuit structure on the packaging layer by using a mask process, the structure includes a peripheral trace region and a touch region connected with the trace, and the touch region is a metal network structure. Functionally, the touch area includes a signal transmitting electrode (Tx), a bridging portion, and a signal receiving electrode (Rx), and a Dummy electrode (Dummy) area without signal access, the signal transmitting electrode, the signal receiving electrode, and the Dummy electrode area are all usually formed by tmb (tsp Metal a) Metal, the bridging portion is formed by TMA Metal, and the bridging portion connects two portions of the signal transmitting electrode Tx formed by tmb (tsp Metal b) Metal through a conductive via (actually, the signal receiving electrode Rx can also be connected through the bridging portion). When the touch control chip works, the position of the finger is judged according to the capacitance value Cm and the variation quantity delta Cm of the capacitance value between the signal transmitting electrode Tx and the signal receiving electrode Rx before and after the finger is loaded, and then the touch control response is made.
In a conventional design, a metal grid line is positioned in the middle of two openings of a Pixel Definition Layer (PDL), the corresponding pixel structure of the invention is special, if the metal grid line is positioned in the middle of the two openings of the PDL, straight lines along the directions of 45 degrees and 135 degrees can appear, and under a macroscopic view, grains along the directions of 45 degrees and 135 degrees are easy to appear, so that the use experience of a client is influenced.
Disclosure of Invention
In view of the foregoing defects or shortcomings in the prior art, the present application provides a touch substrate, including a display structure layer and a touch electrode layer, where the display structure layer includes a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels, and a pixel defining layer, the pixel defining layer includes a plurality of openings, and each of the first sub-pixels, each of the second sub-pixels, and each of the third sub-pixels respectively corresponds to one opening; the touch electrode layer comprises a first touch electrode and a second touch electrode which are insulated from each other, the touch electrodes respectively comprise a plurality of grid patterns, each grid pattern is a roughly rectangular structure or a square structure formed by grid lines, the grid lines are formed between adjacent openings of the pixel defining layer, and at least part of adjacent grid lines arranged in the same direction are arranged in a staggered mode.
In one embodiment, the number of continuous non-staggered grid lines in the adjacent grid lines arranged in the same direction is less than 10.
In one embodiment, all adjacent gridlines disposed in the same direction are staggered.
In one embodiment, that the center point of the partial sub-pixel of the first sub-pixel row and the center point of the other sub-pixels of the same row are not on a straight line means that the center point of the third sub-pixel and the center point of the first sub-pixel are not on a straight line.
In one embodiment, the first touch electrode is a driving electrode, and the second touch electrode is a sensing electrode, wherein at least a portion of the grid lines of the driving electrode and/or at least a portion of the grid lines of the sensing electrode are arranged in the staggered arrangement.
In one embodiment, the first and third sub-pixels are alternately arranged in a first direction to form a plurality of first sub-pixel rows, the second sub-pixels form a plurality of second sub-pixel rows, the first and second sub-pixel rows are alternately arranged in a second direction, and the first and second directions intersect.
In one embodiment, the center points of some of the sub-pixels in the first sub-pixel row and/or the second sub-pixel row are not on a straight line formed by the center points of other sub-pixels in the same row.
In one embodiment, the fact that the center point of the partial sub-pixel of the first sub-pixel row is not on the straight line formed by the center points of the other sub-pixels of the same row means that the center point of the first sub-pixel forms a straight line and the center point of the third sub-pixel is not on the straight line formed by the center points of the first sub-pixel.
In one embodiment, a center point line of a third sub-pixel in the first sub-pixel row is offset in the second direction by a distance compared to the center point line of the first sub-pixel.
In one embodiment, the staggering is achieved by arranging the grid lines to be at a different distance from the third sub-pixel on one side than the second sub-pixel on the other side.
In one embodiment, the third sub-pixel is surrounded by four second sub-pixels, and the third sub-pixel is offset by a distance in the second direction at the center of the four second sub-pixel composition patterns; the grid pattern around the third sub-pixel comprises a first grid line, a second grid line, a third grid line and a fourth grid line which are sequentially connected, wherein the distance between the first grid line and the third sub-pixel on one side is a first distance, and the distance between the first grid line and the second sub-pixel on the other side is a second distance; the distance between the second grid line and the second sub-pixel on one side of the second grid line is a third distance, the distance between the second grid line and the third sub-pixel on the other side of the second grid line is a fourth distance, the second distance is greater than the first distance, and the third distance is greater than the fourth distance.
In one embodiment, the third grid line is a fifth distance from the third sub-pixel on one side and a sixth distance from the second sub-pixel on the other side; the distance between the fourth grid line and the second sub-pixel on one side of the fourth grid line is a seventh distance, the distance between the fourth grid line and the third sub-pixel on the other side of the fourth grid line is an eighth distance, the fifth distance is the same as or close to the sixth distance, and the seventh distance is the same as or close to the eighth distance.
In one embodiment, the first distance is greater than 4 to 8 microns from the second distance, and the third distance is greater than 4 to 8 microns from the fourth distance.
In one embodiment, the staggering is achieved by offsetting at least part of the grid lines around sub-pixels that are not collinear with the center points of other sub-pixels in the same row.
In one embodiment, the staggering is effected along at least part of the grid lines at 45 ° and/or 135 ° offset from the first direction.
In one embodiment, each of the grid patterns is disposed corresponding to at least one sub-pixel.
In one implementation, the first sub-pixel is a blue sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a red sub-pixel.
The application also provides a display device which comprises the touch substrate in any scheme.
Adopt the scheme of this application, at least partial two are adjoint gridlines 411 and 411' stagger at gridline extending direction and arrange, have avoided the straight extension that the gridline of a plurality of grids constitutes in whole display area promptly, and then can avoid the appearance of macroscopic line, have promoted display effect. And, the sub-pixel is 45 degrees or 135 degrees with the first direction and the third sub-pixel offset type arrangement scheme is matched, compared with the existing arrangement mode, the display effect can be improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a front view of the touch panel of the present application;
FIG. 2 is a schematic cross-sectional view of a touch substrate according to the present application;
FIG. 3 is an enlarged view of portion P of FIG. 1;
FIG. 4 is a schematic view of a sub-pixel distribution on a touch substrate according to the present application;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 7 is an enlarged schematic view of portion P of FIG. 1 according to another embodiment of the present application;
FIG. 8 is an enlarged schematic view of portion P of FIG. 1 according to another embodiment of the present application;
fig. 9 is a cross-sectional view of a touch electrode and a bridge portion according to the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 9, a touch substrate of the present embodiment includes a display structure layer 300 and a touch electrode layer 400, the display structure layer includes a plurality of first sub-pixels 301, a plurality of second sub-pixels 302, a plurality of third sub-pixels 303 and a pixel defining layer 310, as shown in fig. 3, the pixel defining layer 310 includes a plurality of openings, and each of the first sub-pixels 301, each of the second sub-pixels 302, and each of the third sub-pixels 303 respectively corresponds to one opening; the touch electrode layer 400 includes a first touch electrode 420 and a second touch electrode 430 insulated from each other, the touch electrodes each include a plurality of grid patterns 410, the grid patterns 410 are substantially rectangular structures or square structures formed by grid lines 411, the grid lines 411 are formed between adjacent openings of the pixel defining layer 310, and at least some adjacent grid lines 411/411' arranged in the same direction are staggered.
By adopting such a scheme, taking fig. 3 as an example, at least part of two adjacent grid lines 411 (the grid lines of the grid pattern 410 in the upper dotted line frame) and 411' (the grid lines of the grid pattern 410 in the lower dotted line frame) are arranged in a staggered manner in the grid line extending direction (45 degrees from the first direction), that is, straight extension formed by the grid lines of a plurality of grids in the whole display area is avoided, so that occurrence of macro texture can be avoided, and the display effect is improved.
The staggered arrangement means that the projections of two adjacent sections of grid lines 411 perpendicular to the extending direction do not overlap, so that no straight line of the lengths of the two grid lines is formed in the extending direction. For example, in fig. 3, the lower left grid line 411 in the upper dashed box and the upper right grid line 411' in the lower dashed box both extend in a direction 135 ° from the first direction, and their projections in a direction perpendicular to the direction 135 ° (i.e., a straight line in which the direction 45 ° is located) do not overlap.
The specific structure of the touch electrode layer 400 is shown in fig. 1, and includes a plurality of first touch electrode groups and a plurality of second touch electrode groups, each first touch electrode group includes a plurality of first touch electrodes 420 sequentially connected along one direction, each second touch electrode group includes a plurality of second touch electrodes 430 sequentially connected along a direction perpendicular to the one direction, and the plurality of first touch electrodes 420 and the plurality of second touch electrodes 430 are arranged in an interlaced manner. The connection of the plurality of first touch electrodes 420 in the first touch electrode group is realized by the connection portion disposed on the same layer, and the connection of the plurality of second touch electrodes 430 in the second touch electrode group is realized by the bridging portion 431. Of course, the connection of the plurality of second touch electrodes 430 may be implemented by the connection portion, and the connection of the first touch electrode 420 may be implemented by the bridge portion 431. In one aspect, the one direction is the same as the first direction.
Each of the first touch electrode groups and each of the second touch electrode groups are connected to the IC pin area 441 through the routing 440.
As shown in fig. 2, the touch substrate further includes a substrate 101, a circuit layer 102, and an encapsulation layer 200. The circuit layer 102 is disposed on the substrate 101, the display structure layer 300 is disposed on the circuit layer 102, the package layer 200 is disposed on the display structure layer 300, and the touch electrode layer 400 is disposed on the package layer 200. By substantially rectangular or substantially square is meant a standard rectangle/square, a rounded rectangle/square, a chamfered rectangle/square, a non-linear or non-uniform width structure present at the interface of adjacent sides, a rectangular/square structure otherwise rectilinear, and the like.
As shown in fig. 4, in some embodiments, the first sub-pixels 301 and the third sub-pixels 303 are alternately arranged in a first direction to form a plurality of first sub-pixel rows 10, the second sub-pixels 302 form a plurality of second sub-pixel rows 20, and the first sub-pixel rows 10 and the second sub-pixel rows 20 are alternately arranged in a second direction, and the first direction and the second direction intersect.
In some embodiments, the first direction is substantially perpendicular to the second direction. In some embodiments, the four grid lines of the grid pattern 410 extend in a direction that is not parallel to both the first direction and the second direction.
In some embodiments, the number of consecutive non-staggered grid lines in the adjacent grid lines arranged in the same direction is less than 10. By adopting the scheme, the whole display area is ensured not to have straight extension formed by more than 10 grid lines, macroscopic lines at any position on the whole area are not obvious, and the visual effect is improved. For example, as shown in fig. 7, three adjacent grid lines are not staggered near the position encircled by the dotted line of the ellipse, and the grid lines are staggered at other positions.
In some embodiments, all of the adjacent grid lines 411 disposed in the same direction are arranged staggered. By adopting the scheme, no two or more grid lines exist in the whole display area to form straight extension, no macroscopic texture exists, and the visual effect is better.
In some embodiments, the center points of some of the sub-pixels in the first sub-pixel row 10 and/or the second sub-pixel row 20 are not on a straight line formed by the center points of other sub-pixels in the same row.
In some embodiments, the fact that the center point of the partial sub-pixel of the first sub-pixel row 10 and the center point of the other sub-pixels of the same row are not on the same straight line means that the center point of the first sub-pixel forms a straight line, and the center point of the third sub-pixel is not on the straight line formed by the center points of the first sub-pixels. In a preferred embodiment, the straight line formed by the center points of the first sub-pixels is parallel to the first direction, and the center point of the third sub-pixel 303 and the center point of any one of the first sub-pixels 301 are continuously not parallel to the first direction. In a preferred embodiment, the center points of the third sub-pixels 303 in the first sub-pixel row 10 are on the same straight line. And more preferably, the direction of the line connecting the center points of the adjacent third sub-pixels 303 is parallel to the first direction. In a preferred embodiment, the center points of the second sub-pixels 302 in the second sub-pixel row 20 are on the same line. And more preferably, the direction of the line connecting the center points of the adjacent second sub-pixels 302 is parallel to the first direction.
As shown in fig. 3 to 6, in some embodiments, the center point line of the third subpixel 303 in the first subpixel row 10 is shifted from the center point line of the first subpixel 301 by a certain distance in the second direction. Experiments show that the display effect can be improved by adopting the offset arrangement scheme compared with the existing arrangement mode.
In some embodiments, all of the second subpixel 302 center points in the second subpixel row 20 are located on the same line.
In some embodiments, the projection of the center of the first sub-pixel 301 in the first sub-pixel row 10 in the first direction is located at the middle position of the projection of the centers of the two adjacent third sub-pixels 303 in the first direction. The projection of the center of the third sub-pixel 303 in the first sub-pixel row 10 in the first direction is located at the middle position of the projection of the centers of the two adjacent first sub-pixels 301 in the first direction.
In some embodiments, the center point of the first sub-pixel 301 and/or the third sub-pixel 303 in the first sub-pixel row 10 is projected in the first direction at a middle position of the projection of the centers of the two adjacent second sub-pixels 302 in the first direction.
In some implementations, four second subpixels 302 around the first subpixel 301 are symmetrically distributed with respect to the first direction and the second direction.
In some embodiments, the shape of the first sub-pixel 301, the second sub-pixel 302 and the third sub-pixel 303 is selected from any one of a polygon, an axisymmetric pattern, and a centrosymmetric pattern, and may be, for example, an irregular polygon, such as a rectangle with one or three corners cut off, a rectangle with two adjacent corners cut off, a rectangle with two opposite corners cut off, and the like. For example, it may be rectangular, square, diamond, oblong, oval, triangular, pentagonal, hexagonal, etc.
In some embodiments, the first subpixel 301 is square, the second subpixel 302 is rectangular, and the third subpixel 303 is square. In some embodiments, the edges of the first, second, and third subpixels 301, 302, and 303 are disposed at 45 ° or 135 ° to the first direction. In a preferred embodiment, the side length of the first sub-pixel 301 is greater than the length of the second sub-pixel 302, and the width of the second sub-pixel 302 is greater than the side length of the third sub-pixel 303.
In some embodiments, the staggering is achieved by offsetting at least a portion of the grid lines 411 around subpixels that are not collinear with the center points of other subpixels in the same row. For example, in the case where the centers of the third sub-pixels 303 are not collinear with respect to the center of the first sub-pixel 301, at least a portion of the grid lines 411 around at least a portion of the third sub-pixels 303 are offset. For example, the center of the third sub-pixel 303 may be offset to the second direction by a certain distance with respect to a connection line of the center point of the first sub-pixel 301, and a grid line 411 far from the second direction among grid lines 411 around the third sub-pixel 303 may be offset to the second direction by a certain distance. In a case where the extending direction of the four grid lines of the grid pattern 410 is not parallel to both the first direction and the second direction, two grid lines 411 distant from the second direction among the grid lines 411 around the third sub-pixel 303 are offset by a certain distance toward the second direction. The grid lines between the first sub-pixel 301 and the second sub-pixel 302 are located in the middle of the adjacent openings of the pixel definition layer.
In some embodiments, the staggering is achieved by arranging the grid lines 411 to have a distance C, F from the third subpixel 303 on one side that is different from the distance D, E from the second subpixel 302 on the other side. In a preferred embodiment, as shown in fig. 3, for example, there are four second sub-pixels 302 around the third sub-pixel 303, and the third sub-pixel 303 is offset to the second direction by a certain distance at the center of the pattern formed by the four second sub-pixels 302. The distance between the grid line 411 on the left and the third sub-pixel 303 is a first distance C, the distance between the grid line 411 on the left and the second sub-pixel 302 on the upper left (one away from the offset direction) is a second distance D, the distance between the grid line 411 on the right and the second sub-pixel 302 on the upper right (another away from the offset direction) is a third distance E, and the distance between the grid line and the third sub-pixel 303 is a fourth distance F. Wherein the second distance D and the third distance E are preferably equal, the first distance C and the fourth distance F are preferably equal, and the second distance D is greater than the first distance C (the size relationship between the second distance D and the first distance D is exemplarily shown in a cross-sectional view in fig. 5, and it can be seen that the upper left grid line 411 and the upper right grid line 411 are not located at the middle position of the adjacent openings of the pixel defining layer); the third distance E is greater than the fourth distance F, preferably 4-8 microns greater. By adopting the scheme, the grid lines 411 are arranged at different distances from the sub-pixels, so that the positions of the grid lines 411 are not positioned in the middle of the pixel definition layer, and the grid lines 411 and the adjacent grid lines extending in the same direction do not form a straight line, thereby improving the display effect. And the scheme of difference of 4-8 microns is adopted to ensure the effect of fully staggering grid lines.
In some embodiments, the lower right grid line 411 is a fifth distance from the third subpixel 303, a sixth distance from the lower right (one closer to the offset direction) second subpixel 302, a seventh distance from the lower left (another closer to the offset direction) second subpixel 302, and an eighth distance from the third subpixel 303. Wherein the fifth distance and the eighth distance are preferably equal, the sixth distance and the seventh distance are preferably equal, and the fifth distance is equal to or close to the sixth distance, and the seventh distance is equal to or close to the eighth distance, wherein close means that the difference is within 2 micrometers.
In some embodiments, each of the grid patterns 410 corresponds to a sub-pixel arrangement. That is, one grid pattern 410 is disposed around each of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303.
In some embodiments, each of the grid patterns 410 corresponds to two or more sub-pixel arrangements. For example, a grid pattern 410 is disposed around the entirety of one first subpixel 301 and one third subpixel 303 that are adjacent to each other, and a grid pattern 410 is disposed around the entirety of each two adjacent second subpixels 302. Also for example, as shown in fig. 8, five groups of sub-pixels are mainly illustrated, and each of the grid patterns 410 corresponds to one group of sub-pixels, wherein each group of sub-pixels includes 4 sub-pixels, namely, a first sub-pixel 301, a third sub-pixel 303 and two second sub-pixels 302 which are adjacent to each other. Grid lines 410 around each group of sub-pixels are straight lines, the extending direction of the grid lines is 45 degrees or 135 degrees with the first direction, adjacent grid lines extending in the same direction are arranged in a staggered mode, so that the grid lines cannot form a long straight line, macroscopic grains are avoided, and the display effect is improved.
In some implementations, the first subpixel 301 is a blue subpixel, the second subpixel 302 is a green subpixel, and the third subpixel 303 is a red subpixel. In some implementations, the blue sub-pixel is square, the red sub-pixel is square, the green sub-pixel is rectangular, and their sides are at 45 ° or 135 ° angles to the first or second direction.
In some embodiments, as shown in fig. 9, the display structure layer includes an encapsulation layer 200, the touch substrate further includes a barrier layer 510, a metal layer 520, and an insulating layer 530 stacked above the encapsulation layer 200, the touch electrode layer 400 where the first touch electrode 420 and the second touch electrode 430 are located is disposed on the insulating layer 530, a protective layer 540 is disposed on the touch electrode layer 400, and the metal layer 520 includes the bridge portion 521 to electrically connect the second touch electrode 430 at the bridge position through a conductive via 450 disposed in the insulating layer 530.
The metal layer 520 includes a bridge portion 521 and a peripheral signal trace lower metal 522.
The insulating layer 530 is provided with a via hole, and a conductive path 450 is arranged in the via hole.
The touch electrode layer 400 further includes a dummy electrode region (not shown) and an upper metal layer 440 of a peripheral signal trace, and the lower metal layer 522 of the peripheral signal trace and the upper metal layer 440 of the peripheral signal trace are electrically connected through the conductive via 450.
The bridging portion 521 is electrically connected to the first touch electrode 420 or the second touch electrode 430 through the conductive via 450 of the insulating layer 530, and is configured to conductively bridge the first touch electrode 420 or the second touch electrode 430 at the intersection of the first touch electrode 420 and the second touch electrode 430.
In some embodiments, the first touch electrode may be a driving electrode Tx, the second touch electrode may be a sensing electrode Rx, or a definition replacement of the first touch electrode and the second touch electrode.
In some embodiments, a protective layer is disposed on the touch electrode layer for insulating and protecting the touch electrode and the upper metal of the peripheral signal trace.
In some embodiments, the barrier layer material may be silicon nitride SiNx, which is formed on the encapsulation layer by deposition. The metal layer is of a titanium-aluminum-titanium (Ti-Al-Ti) structure, and the bridging parts and the lower metal layer of the peripheral signal wiring are formed in a mask exposure etching mode. The insulating layer material can be silicon nitride SiNx, and a via hole pattern is formed in a mask exposure etching mode. The touch electrode layer is made of a metal titanium aluminum titanium Ti-Al-Ti structure, and the touch electrode, the virtual electrode area, the upper metal layer of the peripheral signal wiring and the like are formed in a mask exposure etching mode. The protective layer material can be polyimide PI and is formed through a mask exposure etching mode.
The application also provides a display device which comprises the touch substrate in any scheme.
The application also provides a preparation method of the touch substrate, the touch substrate comprises a display structure layer and a touch electrode layer, and the method comprises the following steps:
depositing a barrier layer on the encapsulation layer;
and forming a metal layer on the barrier layer, and forming a bridging part and peripheral signal wiring lower-layer metal on the metal layer through mask exposure and etching processes.
Forming an insulating layer on the metal layer, and forming a via hole pattern in a mask exposure etching mode;
and forming a touch electrode layer on the insulating layer, and forming the touch electrode, the virtual electrode area, the upper metal layer of the peripheral signal wiring and the like in a mask exposure etching mode.
And forming a protective layer on the touch electrode layer.
An embodiment of a touch substrate of the present application is described below with reference to the drawings, where the touch substrate includes a substrate 101, a circuit layer 102, a display structure layer 300, an encapsulation layer 200, a barrier layer 510, a metal layer 520, an insulating layer 530, a touch electrode layer 400, a protection layer 540, and the like, which are stacked.
The metal layer 520 includes a bridge portion 521 and a peripheral signal trace lower metal 522.
The insulating layer 530 is provided with a via hole, and a conductive path 450 is arranged in the via hole.
The display structure layer 300 includes a plurality of blue sub-pixels 301, a plurality of green sub-pixels 302, and a plurality of red sub-pixels 303, in a first direction, the blue sub-pixels 301 and the red sub-pixels 303 are alternately arranged to form a plurality of first sub-pixel rows 10, the green sub-pixels 302 form a plurality of second sub-pixel rows 20, the first sub-pixel rows 10 and the second sub-pixel rows 20 are alternately arranged in a second direction, the pixel defining layer 310 includes a plurality of openings, and each of the blue sub-pixels 301, each of the green sub-pixels 302, and each of the red sub-pixels 303 respectively corresponds to one opening;
the center points of the blue sub-pixels 301 in the first sub-pixel row 10 are on a straight line, and the center points of the red sub-pixels 303 in the first sub-pixel row 10 are on a straight line, and are shifted to the second direction compared with the center point line of the blue sub-pixels 301 in the same row.
The projection of the centers of the blue sub-pixels 301 in the first sub-pixel row 10 in the first direction is located at the middle position of the projection of the centers of the two adjacent red sub-pixels 303 in the first direction. The projection of the centers of the red sub-pixels 303 in the first sub-pixel row 10 in the first direction is located at the middle position of the projection of the centers of the two adjacent blue sub-pixels 301 in the first direction. The projection of the center points of the blue sub-pixel 301 and the red sub-pixel 303 in the first sub-pixel row 10 in the first direction is located at the middle position of the projection of the centers of the two adjacent green sub-pixels 302 in the first direction.
Four green sub-pixels 302 around the blue sub-pixel 301 are in a state of being symmetrically distributed with respect to the first direction and the second direction.
The blue sub-pixel 301 is square, the green sub-pixel 302 is rectangular, the red sub-pixel 303 is square, and the edge of the sub-pixel is arranged at 45 degrees or 135 degrees with respect to the first direction.
The touch electrode layer 400 includes a first touch electrode 420, a second touch electrode 430, which are insulated from each other, and a dummy electrode region (not shown in the figure) and an upper metal 440 of a peripheral signal trace, where the lower metal 522 of the peripheral signal trace and the upper metal 440 of the peripheral signal trace are electrically connected through the conductive via 450;
the bridging portion 521 is electrically connected to the first touch electrode 420 or the second touch electrode 430 through the conductive via 450 of the insulating layer 530, and is configured to conductively bridge the first touch electrode 420 or the second touch electrode 430 at the intersection of the first touch electrode 420 and the second touch electrode 430.
The touch electrodes each include a plurality of grid patterns 410, the grid patterns 410 are rectangular structures or square structures formed by grid lines 411, and the grid lines 411 are formed between adjacent openings of the pixel defining layer 310; each of the grid patterns 410 is disposed corresponding to one of the sub-pixels, that is, one grid pattern 410 is disposed around each of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303.
Wherein the offset is realized by offsetting two grid lines 411 which are relatively far away from the second direction in the grid lines 411 around the red sub-pixel 303 to the second direction by a certain distance.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (17)
1. A touch substrate comprises a display structure layer and a touch electrode layer, and is characterized in that: the display structure layer comprises a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels and a pixel defining layer, wherein the pixel defining layer comprises a plurality of openings, and each first sub-pixel, each second sub-pixel and each third sub-pixel respectively correspond to one opening; the touch electrode layer comprises a first touch electrode and a second touch electrode which are insulated from each other, the touch electrodes respectively comprise a plurality of grid patterns, each grid pattern is a roughly rectangular structure or a square structure formed by grid lines, the grid lines are formed between adjacent openings of the pixel defining layer, and at least part of adjacent grid lines arranged in the same direction are arranged in a staggered mode.
2. The touch substrate of claim 1, wherein: the number of continuous grid lines which are not staggered in the adjacent grid lines arranged in the same direction is less than 10.
3. The touch substrate of claim 1, wherein: all the adjacent grid lines arranged in the same direction are arranged in a staggered mode.
4. The touch substrate of claim 1, wherein: the first touch electrode is a driving electrode, the second touch electrode is an induction electrode, and at least part of grid lines of the driving electrode and/or at least part of grid lines of the induction electrode are arranged in a staggered manner.
5. The touch substrate of claim 1, wherein: the first and third sub-pixels are alternately arranged in a first direction to form a plurality of first sub-pixel rows, the second sub-pixels form a plurality of second sub-pixel rows, the first and second sub-pixel rows are alternately arranged in a second direction, and the first and second directions intersect.
6. The touch substrate of claim 5, wherein: the center points of a part of the sub-pixels in the first sub-pixel row and/or the second sub-pixel row are not on a straight line formed by the center points of other sub-pixels in the same row.
7. The touch substrate of claim 6, wherein: the fact that the central point of the partial sub-pixel of the first sub-pixel row is not on the straight line formed by the central points of other sub-pixels in the same row means that the central point of the first sub-pixel forms a straight line, and the central point of the third sub-pixel is not on the straight line formed by the central points of the first sub-pixel.
8. The touch substrate of claim 7, wherein: the center point connecting line of the third sub-pixel in the first sub-pixel row is offset to the second direction by a certain distance compared with the center point connecting line of the first sub-pixel.
9. The touch substrate of claim 1, wherein: the staggering is realized by setting the distance between the grid lines and the third sub-pixel on one side to be different from the distance between the grid lines and the second sub-pixel on the other side.
10. The touch substrate of claim 9, wherein: four second sub-pixels are arranged around the third sub-pixel, and the third sub-pixel shifts a certain distance towards the second direction at the center of the pattern formed by the four second sub-pixels; the grid pattern around the third sub-pixel comprises a first grid line, a second grid line, a third grid line and a fourth grid line which are sequentially connected, wherein the distance between the first grid line and the third sub-pixel on one side is a first distance, and the distance between the first grid line and the second sub-pixel on the other side is a second distance; the distance between the second grid line and the second sub-pixel on one side of the second grid line is a third distance, the distance between the second grid line and the third sub-pixel on the other side of the second grid line is a fourth distance, the second distance is greater than the first distance, and the third distance is greater than the fourth distance.
11. The touch substrate of claim 10, wherein: the distance between the third grid line and the third sub-pixel on one side of the third grid line is a fifth distance, and the distance between the third grid line and the second sub-pixel on the other side of the third grid line is a sixth distance; the distance between the fourth grid line and the second sub-pixel on one side of the fourth grid line is a seventh distance, the distance between the fourth grid line and the third sub-pixel on the other side of the fourth grid line is an eighth distance, the fifth distance is the same as or close to the sixth distance, and the seventh distance is the same as or close to the eighth distance.
12. The touch substrate of claim 10, wherein: the first distance is greater than 4-8 microns from the second distance, and the third distance is greater than 4-8 microns from the fourth distance.
13. The touch substrate of claim 6, wherein: the staggering is realized by offsetting at least part of grid lines around the sub-pixels which are not in the same straight line with the center points of other sub-pixels in the same row.
14. The touch substrate of any one of claims 1-13, wherein: the staggering is effected along at least part of the grid lines at 45 ° and/or 135 ° offset from the first direction.
15. The touch substrate of any one of claims 1-13, wherein: each grid pattern is arranged corresponding to at least one sub-pixel.
16. The touch substrate of any one of claims 1-13, wherein: the first sub-pixel is a blue sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a red sub-pixel.
17. A display device comprising the touch substrate according to any one of claims 1 to 16.
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| WO2023184595A1 (en) * | 2022-04-01 | 2023-10-05 | 武汉华星光电半导体显示技术有限公司 | Touch display panel and display device |
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