CN108196736B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN108196736B CN108196736B CN201810004523.1A CN201810004523A CN108196736B CN 108196736 B CN108196736 B CN 108196736B CN 201810004523 A CN201810004523 A CN 201810004523A CN 108196736 B CN108196736 B CN 108196736B
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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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- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The embodiment of the invention provides a touch display panel and a touch display device, relates to the technical field of display, and aims to improve the detection sensitivity of a touch position during touch. The touch display panel comprises a plurality of first touch electrodes and a plurality of second touch electrodes, and the first touch electrodes and the second touch electrodes are arranged in a same-layer insulation manner; the first touch control electrodes are arranged along a first direction and extend along a second direction; the second touch control electrodes are arranged along the second direction and extend along the first direction; the first touch electrode comprises a plurality of first electrode blocks, and two adjacent first electrode blocks are connected; each second touch electrode comprises a plurality of second electrode blocks, two adjacent second electrode blocks are connected through a bridge-spanning structure, and the bridge-spanning structure and the second electrode blocks are arranged in different layers; the first electrode block and the second electrode block are in a comb-tooth-shaped structure, and a plurality of first tooth electrode strips included in the first electrode block and a plurality of second tooth electrode strips included in the second electrode block are mutually embedded. The touch display panel is used for realizing a touch function.
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 ]
With the development of display technology, touch display panels with touch function have been widely used. As shown in fig. 1, a plurality of touch sensing electrodes 1 'arranged along a column direction and a plurality of touch driving electrodes 2' arranged along a row direction are disposed in a display area of the touch display panel, and mutual capacitance is generated between the touch sensing electrodes 1 'and the touch driving electrodes 2'.
However, with this arrangement, the mutual capacitance generated between the touch sensing electrode 1 'and the touch driving electrode 2' is small, and when a finger touches the display screen, if the wrist and the finger approach the display screen together, a sensing error will be caused, and further a detection error of the touch position will be caused, and the detection sensitivity will be reduced.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a touch display panel and a touch display device, so as to improve the detection sensitivity of a touch position during touch.
In one aspect, an embodiment of the present invention provides a touch display panel, where the touch display panel includes a plurality of first touch electrodes and a plurality of second touch electrodes, and the first touch electrodes and the second touch electrodes are arranged in a same layer in an insulating manner;
the first touch control electrodes are arranged along a first direction and extend along a second direction; the second touch control electrodes are arranged along the second direction and extend along the first direction;
each first touch electrode comprises a plurality of first electrode blocks arranged along the second direction, and two adjacent first electrode blocks are connected;
each second touch electrode comprises a plurality of second electrode blocks arranged along the first direction, two adjacent second electrode blocks are connected through a bridge-spanning structure, and the bridge-spanning structure and the second electrode blocks are arranged in different layers;
the first electrode block and the second electrode block are both in a comb-tooth-shaped structure, the first electrode block comprises a plurality of first tooth electrode strips, the second electrode block comprises a plurality of second tooth electrode strips, and the first tooth electrode strips and the second tooth electrode strips are mutually embedded.
In another aspect, an embodiment of the present invention provides a touch display device, which includes the touch display panel.
One of the above technical solutions has the following beneficial effects:
compared with the prior art, the first electrode block and the second electrode block are designed to be in a comb-tooth-shaped structure in the embodiment, the plurality of first tooth electrode strips of the first electrode block and the plurality of second tooth electrode strips of the second electrode block are mutually embedded, the length of the slit between the first electrode block and the second electrode block can be increased to a certain extent by adopting the setting mode, and then the mutual capacitance generated between the first electrode block and the second electrode block corresponding to each touch point is increased. The larger the mutual capacitance is, the larger the capacitance variation of the mutual capacitance caused by touch is under the touch of the same degree, so that when a finger and a wrist touch a display screen simultaneously, the larger the touch degree of the finger is, the more obvious difference exists between the change of the mutual capacitance caused by the finger touch and the change of the mutual capacitance caused by the wrist touch, and then the touch position of the finger can be accurately judged, and the detection sensitivity of the touch position is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a touch display panel in the prior art;
fig. 2 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of area A of FIG. 2;
FIG. 4 is a schematic layout diagram of a sub-pixel provided in an embodiment of the present invention;
FIG. 5 is a schematic size diagram of a first rack and a second rack provided by an embodiment of the present invention;
fig. 6 is a first schematic structural diagram of a first electrode block and a second electrode block in a touch display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first electrode block and a second electrode block in the touch display panel according to the embodiment of the invention;
fig. 8 is a third schematic structural diagram of the first electrode block and the second electrode block in the touch display panel according to the embodiment of the invention;
fig. 9 is a fourth schematic structural diagram of the first electrode block and the second electrode block in the touch display panel according to the embodiment of the invention;
fig. 10 is a schematic structural diagram of a first electrode block and a second electrode block in the touch display panel according to the embodiment of the invention;
fig. 11 is a schematic structural diagram of a bridge structure in a touch display panel according to an embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view taken along line A-A' of FIG. 11;
fig. 13 is a schematic structural diagram of a touch display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided 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 and second may be used to describe the touch electrodes in the embodiments of the present invention, the touch electrodes should not be limited by these terms. These terms are only used to distinguish the touch electrodes from each other. For example, the first touch electrode may also be referred to as a second touch electrode, and similarly, the second touch electrode may also be referred to as a first touch electrode without departing from the scope of the embodiments of the present invention.
An embodiment of the invention provides a touch display panel, as shown in fig. 2, the touch display panel includes a plurality of first touch electrodes 1 and a plurality of second touch electrodes 2, and the first touch electrodes 1 and the second touch electrodes 2 are disposed in a same layer in an insulating manner. The first touch electrodes 1 are arranged along a first direction and extend along a second direction, and the second touch electrodes 2 are arranged along the second direction and extend along the first direction.
Each first touch electrode 1 includes a plurality of first electrode blocks 11 arranged along the second direction, and in each first touch electrode 1, any two adjacent first electrode blocks 11 are connected; each second touch electrode 2 includes a plurality of second electrode blocks 22 arranged along the first direction, in each second touch electrode 2, any two adjacent second electrode blocks 22 are connected by a bridge spanning structure 3, and the bridge spanning structure 3 and the second electrode blocks 22 are arranged in different layers.
Referring to fig. 2 and fig. 3, wherein fig. 3 is an enlarged schematic view of a region a in fig. 2, the first electrode block 11 and the second electrode block 22 are both in a comb-tooth structure, the first electrode block 11 includes a plurality of first tooth electrode bars 111, the second electrode block 22 includes a plurality of second tooth electrode bars 221, and the first tooth electrode bars 111 and the second tooth electrode bars 221 are embedded with each other.
The first direction and the second direction correspond to a row direction and a column direction, and when the first direction is the row direction, the second direction is the column direction, and when the first direction is the column direction, the second direction is the row direction. In the present embodiment, the first direction is schematically illustrated as a column direction and the second direction is schematically illustrated as a row direction in the drawings.
Compared with the prior art, in the present embodiment, the first electrode block 11 and the second electrode block 22 are designed to be comb-shaped structures, and the plurality of first rack electrode bars 111 of the first electrode block 11 and the plurality of second rack electrode bars 221 of the second electrode block 22 are embedded with each other, by adopting this arrangement, the length of the slit between the first electrode block 11 and the second electrode block 22 can be increased to a certain extent, and further, the mutual capacitance generated between the first electrode block 11 and the second electrode block 22 corresponding to each touch point is increased. The larger the mutual capacitance is, the larger the capacitance variation of the mutual capacitance caused by touch is under the touch of the same degree, so that when a finger and a wrist touch a display screen simultaneously, the larger the touch degree of the finger is, the more obvious difference exists between the change of the mutual capacitance caused by the finger touch and the change of the mutual capacitance caused by the wrist touch, and then the touch position of the finger can be accurately judged, and the detection sensitivity of the touch position is improved.
Referring to fig. 3 again, the plurality of first rack electrodes 111 and the plurality of second rack electrodes 221 are respectively arranged along the second direction. The width of the first rack electrode 111 in the second direction is x1, the distance between two adjacent second rack electrode 221 in the second direction is y1, the width of the second rack electrode 221 in the second direction is x2, and the distance between two adjacent first rack electrode 111 in the second direction is y2, so as to ensure signal stability and good touch performance, y1/x1 is more than or equal to 1.3 and y2/x2 is more than or equal to 1.3 in 1.12.
Taking the first tooth electrode bar 111 as an example, considering the factors of process errors, y1/x1 is made to be equal to or greater than 1.12, so that a minimum interval can be ensured between the first tooth electrode bar 111 and the second tooth electrode bar 221 adjacent to the first tooth electrode bar 111, on one hand, no overlapping region exists between the first tooth electrode bar 111 and the second tooth electrode bar 221, and then a vertical electric field generated by the overlapping region is avoided, and signal interference is generated between the first tooth electrode bar 111 and the second tooth electrode bar 221, on the other hand, a slit with a certain width can be ensured between the first tooth electrode bar 111 and the second tooth electrode bar 221, and further mutual capacitance can be generated between the first tooth electrode bar 111 and the second tooth electrode bar 221. Let y1/x1 be less than or equal to 1.3, so as to avoid the problem of the touch performance degradation caused by the too long distance between the first rack electrode 111 and the second rack electrode 221 adjacent to the first rack electrode.
Alternatively, for example, the distance r1 between two adjacent first and second rack electrode bars 111 and 221 may be set to be 4.4 μm to 5.6 μm.
Similar to the above description, considering the factors of process errors, r1 is greater than or equal to 4.4 μm, so as to ensure a minimum interval between the first rack electrode 111 and the second rack electrode 221 adjacent to the first rack electrode 111, on one hand, the vertical electric field can be avoided, and on the other hand, the mutual capacitance between the first rack electrode 111 and the second rack electrode 221 can be ensured. Let r1 be less than or equal to 5.6 μm, so as to avoid the problem of the touch performance degradation caused by the too long distance between the first rack electrode 111 and the second rack electrode 221 adjacent thereto.
Optionally, the touch display panel further includes a plurality of pixels, and each pixel includes a plurality of sub-pixels. The following description will be given taking as an example that each pixel 5 shown in fig. 4 includes three sub-pixels 51:
first, each sub-pixel 51 includes an opening area and a non-opening area, and light emitted from the sub-pixel 51 is emitted through the opening area of the sub-pixel 51. Even if the first electrode block 11 and the second electrode block 22 are both made of a light-transmitting material, the first electrode block 11 and the second electrode block 22 may still shield the light to be emitted by a small amount. When the first toothed electrode strip 111 or the second toothed electrode strip 221 covers half of the sub-pixel, for the part of the sub-pixel, one part of the opening area of the sub-pixel is covered by the first toothed electrode strip 111 or the second toothed electrode strip 221, and the other part is exposed. Thus, when the light emitted from the sub-pixel 51 exits through the opening area, the light can be emitted in the whole area of the opening area not covered by the first tooth electrode strip 111 or the second tooth electrode strip 221, that is, the transmittance of the light reaches 100%. For the partial area covered by the first tooth electrode strip 111 or the second tooth electrode strip 221 in the opening area, the light can be shielded for a small part, and the transmittance of the part of the light is only 90% or 80% exemplarily. In this case, the light transmittance of the sub-pixels 51 is not uniform, and the color of the displayed screen is deviated.
Based on the above situation, as shown in fig. 4 and 5, assuming that the length of each pixel 5 in the second direction is x3, the width of the first rack electrode 111 in the second direction is x4, the length of the first rack electrode 111 in the first direction is x5, the width of the second rack electrode 221 in the second direction is x6, and the length of the second rack electrode in the first direction is x7, in order to ensure that the light emitted from the sub-pixel 51 is emitted from the opening region with uniform transmittance, 4 ≦ x4/x3 ≦ 5, 28 ≦ x5/x3 ≦ 32, 4 ≦ x6/x3 ≦ 5, and 28 ≦ x7/x3 ≦ 32 may be used.
Taking the first tooth electrode strip 111 as an example, by limiting the length and width of the first tooth electrode strip 111, on one hand, the tooth electrode strip 111 can have sufficient length and width to ensure that the tooth electrode strip 111 completely covers the opening areas of all the corresponding sub-pixels, and on the other hand, the tooth electrode strip 111 can be prevented from having too large length and width to cause the tooth electrode strip 111 to cover partial opening areas of the sub-pixels in other areas. With this arrangement, it is ensured that the light emitted from the sub-pixel 131 is emitted from the opening area with a uniform transmittance, and the color of the displayed picture is prevented from being deviated.
Optionally, in order to prevent the first and second tooth electrode strips 111 and 221 from covering only a part of the opening area of the sub-pixel, the first and second tooth electrode strips 111 and 221 may be arranged in a zigzag structure.
Specifically, as shown in fig. 6, the edge of the first toothed electrode strip 111 arranged along the second direction is zigzag, the orthographic projection of the first toothed electrode strip 111 on the touch display panel covers the orthographic projection of the plurality of sub-pixels 51 on the touch display panel, and the opening areas of the plurality of sub-pixels 51 are all located in the orthographic projection of the first toothed electrode strip 111 on the touch display panel, that is, the edge of the first toothed electrode strip 111 arranged along the second direction is matched with the opening areas of the plurality of sub-pixels 51. By adopting the arrangement mode, the opening area of the sub-pixel 51 can be completely covered by the first tooth electrode strip 111, so that the light emitted by the sub-pixel 51 is emitted from the opening area at uniform transmittance, and the color of a displayed picture is prevented from being deviated.
Similarly, referring to fig. 6 again, the edges of the second rack electrodes 221 arranged along the second direction are zigzag, and the orthographic projection of the second rack electrodes 221 on the touch display panel covers the orthographic projection of the plurality of sub-pixels on the touch display panel. Moreover, in order to ensure that the light emitted from the sub-pixels 51 is emitted from the opening regions with uniform transmittance, the opening regions of the sub-pixels 51 are all located in the orthographic projection of the second rack electrode strips 221 on the touch display panel, that is, the edge of the second rack electrode strips 221 arranged along the first direction is matched with the opening regions of the sub-pixels 51.
Optionally, the number of the first rack electrode bars 111 in the first electrode block 11 is m, and the number of the second rack electrode bars 221 in the second electrode block 22 is n, and the number of the first rack electrode bars 111 in one first electrode block 11 may be one more than the number of the second rack electrode bars 221 in one second electrode block 22, that is, m is n +1, where m is a positive integer greater than 1, and n is a positive integer greater than 1.
By adopting the arrangement, when the second rack electrode bar 221 and the first rack electrode bar 111 are mutually embedded, one second rack electrode bar 221 can be arranged between every two adjacent first rack electrode bars 111, so that a slit can be ensured to exist between each first rack electrode bar 111 and the second rack electrode bar 221, and the length of the slit between the first electrode block 11 and the second electrode block 22 is further increased.
Optionally, as shown in fig. 7, the first electrode block 11 further includes a first main electrode bar 112 connected to the first toothed electrode bar 111, the plurality of first toothed electrode bars 111 of the first electrode block 11 are equally distributed on both sides of the first main electrode bar 112, and correspondingly, each second electrode block 22 includes two second main electrode bars 222, and each second main electrode bar 222 is connected to a plurality of second toothed electrode bars 221. The second rack electrode bar 221 connected to one second main electrode bar 222 is fitted to the first main electrode bar 112 on one side.
Alternatively, as shown in fig. 8, all the first tooth electrode bars 111 of each first electrode block 11 are disposed on the same side of the first main electrode bar 112, and correspondingly, each second electrode block 22 includes one second main electrode bar 222, the second main electrode bar 222 is connected with a plurality of second tooth electrode bars 221, and the plurality of second tooth electrode bars 221 and the plurality of first tooth electrode bars 111 are fitted with each other.
By adopting the two arrangement modes, the purpose of increasing the length of the slit between the first electrode block 11 and the second electrode block 22 can be achieved. However, compared to the arrangement shown in fig. 7, the arrangement shown in fig. 8 can increase the length of the slit between the first electrode block 11 and the second electrode block 22 to a certain extent, and can also avoid the problem that the length of the slit between the first electrode block 11 and the second electrode block 22 corresponding to each touch point is too large, and further, the mutual capacitance generated by the two electrode blocks of each touch point is too large, which causes the overall power consumption to be too large.
As shown in fig. 9, a dummy electrode 4 is provided between any adjacent first electrode block 11 and second electrode block 22. The dummy electrode 4 may separate the adjacent first electrode block 11 from the second electrode block 22 to reduce signal interference between the first electrode block 11 and the second electrode block 22.
In order to better reduce the signal interference between the first electrode block 11 and the second electrode block 22, optionally, the distance between the virtual electrode 4 and the edge adjacent to the virtual electrode in the first electrode block 11 is 4.4 μm to 5.6 μm, and the distance between the virtual electrode and the edge adjacent to the virtual electrode in the second electrode block 22 is 4.4 μm to 5.6 μm.
Referring again to fig. 9, the first electrode block 11 includes two outer first rack electrodes 111 and at least one inner first rack electrode 111. Along the second direction, one outer first rack electrode 111, at least one inner first rack electrode 111, and the other outer first rack electrode 111 are arranged in sequence. With reference to the direction shown in fig. 9, the outer first rack electrode 111 refers to two first rack electrode 111 on the leftmost side and the left and right sides, and the inner first rack electrode 111 refers to at least one first rack electrode 111 arranged in the middle.
Specifically, the dummy electrode may include any one or any number of first, second, third, and fourth dummy electrodes 41, 42, 43, and 44 as described below.
The first dummy electrode 41 is disposed between the outer first rack electrode 111 and the adjacent second rack electrode 221, and the first dummy electrode 41 is used to separate the outer first rack electrode 111 from the adjacent second rack electrode 221, so as to reduce signal interference between the outer first rack electrode 111 and the second rack electrode 221. The distance between the first dummy electrode 41 and the outer first rack electrode 111 adjacent thereto and the distance between the first dummy electrode and the second rack electrode 221 adjacent thereto are both 4.4 μm to 5.6 μm.
The second dummy electrode 42 is a U-shaped structure, and an inner first rack electrode 111 is disposed in the notch of the second dummy electrode 42. The second dummy electrode 42 is used to separate the inner first rack electrode 111 from the adjacent second rack electrode 221, and reduce signal interference between the inner first rack electrode 111 and the second rack electrode 221. The distance between the second dummy electrode 42 and the inner first rack electrode 111 adjacent thereto and the distance between the second dummy electrode and the second rack electrode 221 adjacent thereto are respectively 4.4 μm to 5.6 μm.
The third dummy electrode 43 is disposed between the second rack electrode bar 221 and the first main electrode bar 112. The third dummy electrode 43 is used to separate the second rack electrode bar 221 from the first main electrode bar 112 to reduce signal interference between the first main electrode bar 112 and the second rack electrode bar 221. The distance between the third dummy electrode 43 and the first main electrode bar 112 adjacent thereto and the distance between the third dummy electrode 43 and the second rack electrode bar 221 adjacent thereto are respectively 4.4 to 5.6 μm.
It should be noted that, when the first dummy electrode 41 and the second dummy electrode 42 are disposed between the first electrode block 11 and the second electrode block 22, assuming that the width of the first rack electrode 111 in the second direction is x1', the distance between two adjacent second rack electrode bars 221 in the second direction is y1', the width of the second rack electrode bar 221 in the second direction is x2', and the distance between two adjacent first rack electrode bars 111 in the second direction is y2', x1 ': y1' ═ 1: 2.5-1: 4, x 2': y2' ═ 1: 2.5-1: 4. by adopting the proportional setting, on one hand, a sufficient space can be ensured between the first tooth electrode bar 111 and the second tooth electrode bar 221 to accommodate the first virtual electrode 41 and the second virtual electrode 42, and on the other hand, the problem of reduced touch performance caused by an excessively large distance between the first tooth electrode bar 111 and the second tooth electrode bar 221 can be avoided.
Referring to fig. 9 again, when the length L1 of the second electrode block 22 in the second direction is smaller than the length L2 of the first electrode block 11 in the second direction, the dummy electrodes include a fourth dummy electrode 44, and the fourth dummy electrode 44 is disposed between two second electrode blocks 22 adjacent to each other in the second direction. The fourth dummy electrode 44 is used to reduce signal interference between the second rack electrode bar 221 of the second electrode block 22 and the first electrode block 11. The distance between the fourth dummy electrode 44 and the edge adjacent thereto in the second rack electrode bar 221, and the distance between the fourth dummy electrode 44 and the edge adjacent thereto in the second rack electrode bar 221 are respectively 4.4 μm to 5.6 μm.
Note that, in order to avoid an influence on normal light emission of the sub-pixels, the dummy electrodes 4 are each formed of a light-transmitting material. Optionally, the dummy electrode 4 may be formed by using the same material as the first electrode block 11 and the second electrode block 22, so that in the manufacturing process, the dummy electrode, the first electrode block 11, and the second electrode block 22 may be formed by using the same composition process, thereby simplifying the process flow and reducing the manufacturing cost.
Alternatively, when the plurality of first rack electrode bars 111 and the plurality of second rack electrode bars 221 are respectively arranged along the second direction, in order to make the areas of the first electrode block 11 and the second electrode block 22 corresponding thereto as close as possible, the width of the first rack electrode bar 111 in the second direction may be equal to the width of the second rack electrode bar 221 in the second direction. The areas of the first electrode block 11 and the second electrode block 22 corresponding to the first electrode block are made to be close to each other, so that mutual capacitance generated between the first electrode block 11 and the second electrode block 22 corresponding to each touch point is made to be close to each other, and the touch sensing degree of each touch point is ensured to be approximate, so that the touch sensing degree in the whole touch area is uniform.
As shown in fig. 10, optionally, the width h1 of the inner first rack electrode 111 in the second direction is smaller than the width h2 of the outer first rack electrode 111 in the second direction. By setting the width of the inner first rack electrode 111 to be narrower, a larger number of inner first rack electrode 111 can be arranged in the first electrode block 11 in an area corresponding to one touch point, that is, a larger number of slits can be formed between the inner first rack electrode 111 and the second rack electrode 221, so that the capacitance of the mutual capacitance generated by the first electrode block 11 and the second electrode block 22 corresponding to each touch point is increased, and the detection sensitivity of the touch position is further improved.
In addition, for two adjacent first electrode blocks 11 along the second direction, in order to connect the two first electrode blocks, a connecting portion may be connected between the two first electrode blocks, or, referring to fig. 9 again, the two first electrode blocks 11 may be connected by contacting the outer sub-electrode strips of the two adjacent first electrode blocks. Compared with a mode of connecting through the connecting part, the direct contact connecting mode is adopted, so that the space occupied by the connecting part can be saved, more first electrode blocks 11 can be distributed in the second direction, and the touch precision is further improved.
It should be noted that, in the present embodiment, each first touch electrode 1 is divided into a plurality of first electrode blocks 11 arranged along the second direction, so as to describe the technical solution of the present embodiment more clearly. In an actual process, the first touch electrodes 1 are all formed through the same patterning process, that is, all the first electrode blocks 11 in each first touch electrode 1 are integrally formed, and there is no actual joint between two adjacent first electrode blocks 11.
As shown in fig. 11, when each second electrode block 22 includes k second electrode bars 221 and a second main electrode bar 222 connected to the k second electrode bars 221, k bridge-spanning structures 3 may be connected between two adjacent second electrode blocks 22, and the k second electrode bars 221 are in one-to-one correspondence with the k bridge-spanning structures 3, that is, each second electrode bar 221 is connected to one bridge-spanning structure 3, k is greater than or equal to 1.
Specifically, as shown in fig. 12, fig. 12 is a schematic cross-sectional view along a-a' direction in fig. 11, an insulating layer 6 is disposed between the bridge spanning structure 3 and the first electrode block 11, a via hole is disposed on the insulating layer 6, and the bridge spanning structure 3 may be connected to the second electrode block 22 through the via hole. Of course, the bridge structure 3 may be connected to the second electrode block 22 by other methods, which is not limited in this embodiment.
When the second electrode block 22 includes a plurality of second rack electrodes 221, if only one bridge structure 3 is connected between two adjacent second electrode blocks 22, when the bridge structure is disconnected due to factors such as electrostatic breakdown, the connection relationship between the two second electrode blocks 22 is disconnected, and the touch accuracy is further affected. In the embodiment, one bridge structure 3 is arranged corresponding to each second rack electrode 221, so that even if one or more bridge structures 3 are disconnected, the second electrode blocks 22 can still be connected through the rest bridge structures 3, and the connection stability between the second electrode blocks 22 can be improved.
In addition, because the orthographic projection of the bridge-spanning structure 3 on the plane of the touch display panel coincides with the orthographic projection of the first electrode block 11 on the plane of the touch display panel, if the bridge-spanning structure 3 is made of the same material as the first electrode block 11 and the second electrode block 22, the bridge-spanning structure 3 will interfere with the signals of the first electrode block 11 and the second electrode block 22, and the touch precision is affected. Therefore, in order to avoid the bridge structure 3 from adversely affecting the first electrode block 11 and the second electrode block 22, the bridge structure 3 needs to be formed of a different material from the second electrode block 22.
Optionally, since the surface resistance of the metal material is low, in order to reduce the surface resistance of the touch electrode and further reduce power consumption, the bridge spanning structure 3 may be a metal bridge formed by the metal material.
When the bridging structure 3 is a metal bridging structure, one end of the bridging structure 3 may be connected to the corresponding second electrode bar 221 of one second electrode block 22, and the other end of the bridging structure may be connected to the second main electrode bar 222 of another second electrode block 22. By adopting the connection mode, the length of the bridge-spanning structure 3 in the first direction can be reduced, on one hand, the shielding of the metal material on the light emitted by the sub-pixels is avoided as much as possible, the visibility of the metal material is reduced, and on the other hand, the surface resistance value can be further reduced.
In addition, in order to further reduce the shielding of the light emitted by the sub-pixels by the metal material, please refer to fig. 11 again, the bridge structure 3 may be set as a grid structure. When the bridge spanning structure 3 is a mesh-like structure, the bridge spanning structure 3 includes a plurality of meshes, each mesh corresponding to an open area of at least one pixel.
Optionally, when the touch display panel includes a touch sensing electrode and a touch driving electrode, the first touch electrode 1 is a touch sensing electrode, and the second touch electrode 2 is a touch driving electrode. Or, the first touch electrode 1 is a touch driving electrode, and the second touch electrode 2 is a touch sensing electrode.
Optionally, the material of the first touch electrode 1 and the second touch electrode 2 includes any one of indium tin oxide, indium zinc oxide, or indium gallium zinc oxide. The first touch electrode 1 and the second touch electrode 2 are formed by indium tin oxide, indium zinc oxide or indium gallium zinc oxide materials, and based on mature manufacturing technology, electrode layers with good uniformity can be formed, and the first touch electrode 1 and the second touch electrode 2 can have high light transmittance.
An embodiment of the present invention further provides a touch display device, as shown in fig. 13, including the touch display panel 100. The specific structure of the touch display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the touch display device shown in fig. 13 is only a schematic illustration, and the touch display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic paper book, or a television.
Because the touch display device provided in this embodiment includes the touch display panel, compared with the prior art, the length of the slit between the first electrode block and the second electrode block in the touch display panel can be increased to a certain extent by using the touch display device in this embodiment, and then mutual capacitance generated between the first electrode block and the second electrode block corresponding to each touch point is increased. Therefore, when a finger touches the display screen, the larger the variation of mutual capacitance generated between the first electrode block and the second electrode block corresponding to the touch point is, the more accurately the touch position corresponding to the finger touch can be identified, and the detection sensitivity of the touch display device is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. A touch display panel is characterized by comprising a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the first touch electrodes and the second touch electrodes are arranged in a same layer in an insulating manner;
the first touch control electrodes are arranged along a first direction and extend along a second direction; the second touch control electrodes are arranged along the second direction and extend along the first direction;
each first touch electrode comprises a plurality of first electrode blocks arranged along the second direction, and two adjacent first electrode blocks are connected;
each second touch electrode comprises a plurality of second electrode blocks arranged along the first direction, two adjacent second electrode blocks are connected through a bridge-spanning structure, and the bridge-spanning structure and the second electrode blocks are arranged in different layers;
the first electrode block and the second electrode block are both in a comb-tooth-shaped structure, the first electrode block comprises a plurality of first tooth electrode strips, the second electrode block comprises a plurality of second tooth electrode strips, and the first tooth electrode strips and the second tooth electrode strips are mutually embedded;
the plurality of first rack electrode bars and the plurality of second rack electrode bars are respectively arranged along the second direction;
the width of the first rack electrode bar in the second direction is x1, the distance between two adjacent second rack electrode bars in the second direction is y1, wherein y1/x1 is more than or equal to 1.12 and less than or equal to 1.3;
the width of the second rack electrode bar in the second direction is x2, the distance between two adjacent first rack electrode bars in the second direction is y2, wherein y2/x2 is more than or equal to 1.12 and less than or equal to 1.3;
alternatively, the first and second electrodes may be,
the distance between the two adjacent first tooth electrode bars and the second tooth electrode bar is 4.4-5.6 μm;
the touch display panel further comprises a plurality of pixels, and the length of each pixel in the second direction is x 3;
the width of the first tooth electrode strip in the second direction is x4, x4/x3 is more than or equal to 4 and less than or equal to 5, the length of the first tooth electrode strip in the first direction is x5, and x5/x3 is more than or equal to 28 and less than or equal to 32;
the width of the second rack electrode bar in the second direction is x6, x6/x3 is more than or equal to 4 and less than or equal to 5, and the length of the second rack electrode bar in the first direction is x7, and x7/x3 is more than or equal to 28 and less than or equal to 32.
2. The touch display panel of claim 1, wherein each of the pixels comprises a plurality of sub-pixels;
the edge of the first toothed electrode strip arranged along the second direction is in a sawtooth shape, the orthographic projection of the first toothed electrode strip on the touch display panel covers the orthographic projection of the plurality of sub-pixels on the touch display panel, and the opening areas of the plurality of sub-pixels are all positioned in the orthographic projection of the first toothed electrode strip on the touch display panel;
the edge of the second toothed electrode strip arranged along the second direction is in a sawtooth shape, the orthographic projection of the second toothed electrode strip on the touch display panel covers the orthographic projection of the sub-pixels on the touch display panel, and the opening areas of the sub-pixels are all located in the orthographic projection of the second toothed electrode strip on the touch display panel.
3. The touch display panel according to claim 1, wherein the first electrode block further includes a first main electrode bar connected to the first tooth electrode bar, and all the first tooth electrode bars of the first electrode block are disposed on the same side of the first main electrode bar.
4. The touch display panel according to claim 1, wherein the number of the first rack electrode bars in the first electrode block is m, and the number of the second rack electrode bars in the second electrode block is n, where m is n +1, m is a positive integer greater than 1, and n is a positive integer greater than 1.
5. The touch display panel according to claim 1, wherein a dummy electrode is disposed between any adjacent first electrode block and the second electrode block.
6. The touch display panel according to claim 5, wherein the distance between the dummy electrode and the edge adjacent to the dummy electrode in the first electrode block is 4.4 μm to 5.6 μm, and the distance between the dummy electrode and the edge adjacent to the dummy electrode in the second electrode block is 4.4 μm to 5.6 μm.
7. The touch display panel according to claim 5, wherein the first electrode block includes two outer first rack electrode bars and at least one inner first rack electrode bar, and along the second direction, one of the outer first rack electrode bars, at least one of the inner first rack electrode bars, and the other of the outer first rack electrode bars are arranged in sequence; the first electrode block further comprises a first main electrode bar connected with the outer side first tooth electrode bar and the inner side first tooth electrode bar;
the virtual electrode includes:
the first virtual electrode is arranged between the outer first toothed electrode bar and the second toothed electrode bar adjacent to the outer first toothed electrode bar;
and/or the second virtual electrode is of a U-shaped structure, and the notch of the second virtual electrode is internally provided with one first tooth electrode strip at the inner side;
and/or a third virtual electrode which is arranged between the second rack electrode bar and the first main electrode bar.
8. The touch display panel according to claim 5, wherein the length of the second electrode block in the second direction is smaller than the length of the first electrode block in the second direction;
the virtual electrode comprises a fourth virtual electrode, and the fourth virtual electrode is arranged between two adjacent second electrode blocks in the second direction.
9. The touch display panel according to claim 1, wherein a plurality of the first rack electrode bars and a plurality of the second rack electrode bars are arranged in the second direction, respectively, and a width of the first rack electrode bars in the second direction is equal to a width of the second rack electrode bars in the second direction.
10. The touch display panel according to claim 1, wherein the first electrode block comprises two outer first rack electrode bars and at least one inner first rack electrode bar; along the second direction, one outer first tooth electrode strip, at least one inner first tooth electrode strip and the other outer first tooth electrode strip are sequentially arranged;
the width of the inner first rack electrode bar in the second direction is smaller than the width of the outer first rack electrode bar in the second direction.
11. The touch display panel according to claim 1, wherein the first electrode block comprises two outer first rack electrode bars and at least one inner first rack electrode bar; along the second direction, one outer first tooth electrode strip, at least one inner first tooth electrode strip and the other outer first tooth electrode strip are sequentially arranged;
and along the second direction, the outer sub-electrode strips of two adjacent first electrode blocks are contacted.
12. The touch display panel according to claim 1, wherein each of the second electrode blocks includes k second electrode bars and a second main electrode bar connected to the k second electrode bars, k bridge-spanning structures are connected between two adjacent second electrode blocks along the first direction, the k second electrode bars are in one-to-one correspondence with the k bridge-spanning structures, and k is greater than or equal to 1;
one end of the bridge-spanning structure is connected with a corresponding second rack electrode bar in one of the second electrode blocks, and the other end of the bridge-spanning structure is connected with a second main electrode bar of the other second electrode block.
13. The touch display panel according to claim 1, wherein the bridge-spanning structure is a metal bridge-spanning structure, and the bridge-spanning structure is a grid-like structure.
14. The touch display panel of claim 13, wherein the bridge structure comprises a plurality of mesh openings, each mesh opening corresponding to an open area of at least one pixel.
15. The touch display panel of claim 1,
the first touch control electrode is a touch control induction electrode, and the second touch control electrode is a touch control driving electrode;
or, the first touch electrode is a touch driving electrode, and the second touch electrode is a touch sensing electrode.
16. The touch display panel according to claim 1, wherein a material of the first touch electrode and the second touch electrode comprises any one of indium tin oxide, indium zinc oxide, and indium gallium zinc oxide.
17. A touch display device, comprising the touch display panel according to any one of claims 1 to 16.
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| CN110968221B (en) * | 2019-12-19 | 2023-07-25 | 京东方科技集团股份有限公司 | Touch panel and display device |
| CN111625139A (en) | 2020-05-22 | 2020-09-04 | 京东方科技集团股份有限公司 | Touch panel and touch display device |
| US11500500B2 (en) | 2020-06-28 | 2022-11-15 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Touch component and touch display device |
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| CN111966249B (en) * | 2020-09-22 | 2024-03-15 | 京东方科技集团股份有限公司 | Touch display panel and electronic device |
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Effective date of registration: 20211026 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |