CN201336029Y - Capacitance touch screen - Google Patents
Capacitance touch screen Download PDFInfo
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- CN201336029Y CN201336029Y CNU2009200506342U CN200920050634U CN201336029Y CN 201336029 Y CN201336029 Y CN 201336029Y CN U2009200506342 U CNU2009200506342 U CN U2009200506342U CN 200920050634 U CN200920050634 U CN 200920050634U CN 201336029 Y CN201336029 Y CN 201336029Y
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Abstract
A capacitance touch screen comprises at least one transparent insulating layer and at least one transparent electrode conducting layer, wherein the transparent electrode conducting layer is arranged on the transparent insulating layer and comprises a plurality of electrodes. The touch screen is characterized in that in the visual region of the capacitance touch screen, the edge of each electrode on the transparent electrode conducting layer is jagged. In the utility model, the edge of each electrode on the transparent electrode conducting layer is jagged in the visual region of the capacitance touch screen; and the bending of the edges of the electrodes is utilized to ensure that the electrodes with smaller linewidth and edge orientations of the gaps among the electrodes are tilted at an angle with the pixel array arrangement direction of a dot-matrix display device. Therefore, for light interference, the directions of slits are changed equivalently; and the produced interference fringe is not clear or disappears, so that the light interference phenomenon in the visual region of the touch face is effectively decreased or avoided and the better display and visual effect of the display device are ensured.
Description
Technical field
The utility model relate to be used for man-machine between mutual input media, specifically, relate to a kind of capacitive touch screen.
Background technology
Capacitive touch screen has been widely applied in each electronic product, for example mobile phone, mp4, POS terminal etc.Capacitive touch screen transmitance height touches and exerts pressure and needn't exert oneself, and can resist abominable external environment, and long service life is manipulated humanized.
Existing capacitive touch screen normally is provided with one or more transparency electrode conductive layers and (is generally one or two transparency electrode conductive layer on a transparent insulating layer; When being provided with a transparency electrode conductive layer, on a plane of transparent insulating layer, a transparency electrode conductive layer is set; When being provided with two transparency electrode conductive layers, can on two planes of transparent insulating layer, a transparency electrode conductive layer be set respectively, also two transparency electrode conductive layers that are not conducted each other can be set on a plane of transparent insulating layer) as workplace, or one or more transparency electrode conductive layers (respectively being provided with a transparency electrode conductive layer on common two transparent insulating layers) are being set on two transparent insulating layers respectively as workplace.The transparency electrode conductive layer is made up of a plurality of electrodes, the graphics shape of electrode is designed to rectangle more, regular hexagon, polygonal shapes such as rhombus, when touch-screen applications is on the dot matrix display device, always there is the situation with the array direction (directions X or Y direction) parallel or approximate parallel (the array direction angle that is electrode edge and dot matrix display device pixel is very little) of dot matrix display device pixel in the edge of these electrodes, owing to have the certain clearance distance between dot matrix display device pixel and the capacitive touch screen, therefore come out (pixel is equivalent to light source at this moment) and when passing the less electrode of touch-screen live width or each interelectrode gap from dot matrix display device pixel when light, the electrode that live width is less or each interelectrode gap are the equal of a lot of slits, the condition that the partial wave face that shakes is interfered will be satisfied, light becomes coherent light, cause in touch face (being the beam projecting face) interference of light, produce interference fringe, especially when electrode edge is parallel with the array direction of dot matrix display device pixel, the interference of light phenomenon that produces will be more obvious, have a strong impact on the display effect of dot matrix display device.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of capacitive touch screen that can effectively weaken or avoid touching face interference of light phenomenon, and this capacitive touch screen is configurable to be used to have the outer boundary of dot matrix display device (as dot matrix lcd) of the pixel of a large amount of formation array arrangements.The technical scheme that adopts is as follows:
A kind of capacitive touch screen, comprise at least one transparent insulating layer and at least one transparency electrode conductive layer, the transparency electrode conductive layer is arranged on the transparent insulating layer, the transparency electrode conductive layer is made up of a plurality of electrodes, it is characterized in that: in the viewing area of described capacitive touch screen, the edge indentation of each electrode on the transparency electrode conductive layer.
Specifically, in the viewing area of capacitive touch screen, the edge of electrode has a plurality of zigzag projectioies, between adjacent two zigzag projectioies a groove is arranged.The essential characteristic of above-mentioned zigzag projection is, its width reduces to its top gradually from its bottom, and wherein the bottom is meant the position that it is connected with electrode body; Accordingly, the width of groove increases to its top gradually from its bottom.
Preferred zigzag projection is triangular in shape; The drift angle of more preferably above-mentioned zigzag projection (being the angle of two sides of zigzag projection) size is 45 °-135 °; The drift angle of more preferably above-mentioned zigzag projection is 90 °.When preferred above-mentioned capacitive touch screen was configured on the dot matrix display device, the triangle that one of two array directions of being arranged by two sides of zigzag projection and dot matrix display device pixel constitute was an isosceles triangle.
Above-mentioned transparency electrode conductive layer is used for the capacitance variations of detecting touch point and corresponding electric signal is transferred to external circuit as the workplace of capacitive touch screen.
Outside the viewing area of capacitive touch screen, the edge of electrode can indentation, also can be other shape (is straight line or other arbitrary curve as the edge).
Capacitive touch screen can be provided with one or more transparency electrode conductive layers.
When capacitive touch screen is provided with a transparency electrode conductive layer, be provided with a transparent insulating layer, the transparency electrode conductive layer is arranged on the plane of this transparent insulating layer.
When capacitive touch screen is provided with two transparency electrode conductive layers, can be provided with a transparent insulating layer or two transparent insulating layers.Under the situation that is provided with a transparent insulating layer, can on two planes of transparent insulating layer, a transparency electrode conductive layer be set respectively; Also can two transparency electrode conductive layers that are not conducted each other be set on a plane of transparent insulating layer, separate by insulating material between the two transparency electrode conductive layers.Under the situation that is provided with two transparent insulating layers, a transparency electrode conductive layer can be set respectively on two transparent insulating layers.
When capacitive touch screen is provided with three above transparency electrode conductive layers, can be provided with and the identical transparent insulating layer of transparency electrode conductive layer quantity, a transparency electrode conductive layer is set on each transparent insulating layer; Also can be provided with the transparent insulating layer that quantity is less than transparency electrode conductive layer quantity, wherein certain transparent insulating layer is provided with two above transparency electrode conductive layers (set-up mode can with reference to the situation that two transparency electrode conductive layers are set on the above-mentioned transparent insulating layer).
Disturb in order to prevent that electric signal that display device when work produce from producing capacitive touch screen, improve the performance of capacitive touch screen, preferred above-mentioned capacitive touch screen also comprises a screen layer, and screen layer is positioned at the inboard of all transparency electrode conductive layers.In the utility model, the inboard is meant when capacitive touch screen is configured on the display device side near display device, and the outside is meant when capacitive touch screen is configured on the display device side away from display device.Usually screen layer can be located on the medial surface of the transparent insulating layer of close display device.
Above-mentioned transparent insulating layer is made by the optical clear insulating material, and the optical clear insulating material of employing can be glass, organic glass class rigidity transparent insulation material, for example polymethylmethacrylate (PMMA), polycarbonate (PC); Also can be polyesters transparent insulation material, as polyethylene terephthalate (PET) with soft bendability.
Above-mentioned transparency electrode conductive layer and screen layer are made by transparent conductive material, and the transparent conductive material of employing can be tin indium oxide (ITO), Zinc oxide doped aluminium (ZAO), cadmium oxide (CdO), indium zinc oxide (IZO) or other transparent conductive material.
The utility model is in the viewing area of capacitive touch screen, the edge indentation of each electrode on the transparency electrode conductive layer, utilize the bending of electrode edge, make the less electrode of capacitive touch screen live width (as filling electrode, the lead-in wire electrode) and the edge orientation and the angled inclination of dot matrix display device pixel array arragement direction in each interelectrode gap, therefore, with regard to interference of light, it is the equal of the direction that has changed slit, make the not obvious or disappearance of interference fringe of generation, effectively weaken or avoid touching face viewing area interference of light phenomenon, make display device have preferable demonstration visual effect.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the synoptic diagram of the electrode pattern design of the utility model embodiment 1 transparency electrode conductive layer;
Fig. 3 is the synoptic diagram that the pixel array of dot matrix display device is arranged;
Fig. 4 is the enlarged drawing of induction electrode and lead-in wire electrode thereof and peripheral filling electrode among Fig. 2, and and the pixel-matrix column direction of dot matrix display device between the synoptic diagram of relation;
Fig. 5 is the another kind of pattern curve of electrode edge in the utility model embodiment 1 transparency electrode conductive layer;
Fig. 6 is the structural representation of the utility model embodiment 2;
Fig. 7 is the synoptic diagram of the electrode pattern design of the utility model embodiment 2 transparency electrode conductive layers.
Embodiment
As depicted in figs. 1 and 2, this capacitive touch screen comprises a transparent insulating layer 11, a transparency electrode conductive layer 12 and a screen layer 13, transparency electrode conductive layer 12 is arranged on the lateral surface of transparent insulating layer 11, screen layer 13 is arranged on the medial surface of transparent insulating layer 11 (when capacitive touch screen is configured on the display device, screen layer 13 is in the side of capacitive touch screen near display device, be that screen layer 13 is between transparent insulating layer 11 and display device), transparency electrode conductive layer 12 is made up of a plurality of electrodes and (is comprised six induction electrodes 121, six go between electrodes 122 and filling electrodes 123).This capacitive touch screen can be used for the single-point touches operation.In addition, the quantity of induction electrode 121 and lead-in wire electrode 122 can be provided with according to actual needs, induction electrode 121 and correspondingly connection identical with lead-in wire electrode 122 quantity.
Produce the electrode of inductance capacitance when induction electrode 121 touches for touch-screen, each induction electrode 121 is conducting mutually not, has void area between them; Lead-in wire electrode 122 is for connecting the transparent lead of induction electrode 121 and external circuit, and each lead-in wire electrode 122 corresponding induction electrode 121 during touch-screen work, is finished the transmission of electric signal between induction electrode 121 and the external circuit by lead-in wire electrode 122; Filling electrode 123 is distributed between the induction electrode 121 and induction electrode 121 and the void area that goes between between the electrode 122, not with induction electrode 121, lead-in wire electrode 122 conductings, its effect be can eliminate induction electrode 121, lead-in wire electrode 122 produces the electrode shadow on transparent insulating layer 11.
In the viewing area 14 of capacitive touch screen, the edge indentation of each electrode on the transparency electrode conductive layer 12 (comprise induction electrode 121, lead-in wire electrode 122 and fill electrode 123), be that each induction electrode 121, lead-in wire electrode 122 and the edge of filling electrode 123 have a plurality of zigzag projectioies 124, between adjacent two zigzag projectioies 124 groove 125 arranged; At the adjoiner of two electrodes (as induction electrode 121 and the adjoiner of filling electrode 123, lead-in wire electrode 122 and the adjoiner of filling electrode 123), the zigzag projection 124 of an electrode edge is inserted in the groove 125 of another electrode edge, and leaves gap 126 between zigzag projection 124 and groove 125 inwalls.
In the present embodiment, zigzag projection 124 is triangular in shape, that is to say that the edge of each electrode is the curve that is in turn connected to form by a plurality of line segments, between adjacent two line segments angle is arranged; The drift angle of zigzag projection 124 (being the angle α of 124 two sides of zigzag projection) is 90 °.As shown in Figure 3, dot matrix display device (for example dot matrix lcd) has a large amount of pixel 16 and forms array arrangement, arrange two array directions of correspondence of two groups of straight line represent pixel points 16 of X, Y; As shown in Figure 4, the dual-side of electrode edge zigzag projection 124 is that drift angle is 90 ° a isosceles triangle with the triangle that corresponding dot matrix display device pixel-matrix column direction X or Y constitute.In addition, during actual design, the big I of the drift angle of zigzag projection 124 (being the angle of 124 two sides of zigzag projection) is selected between 45 °-135 °, and is not limited to 90 °; The dual-side of zigzag projection 124 also is not limited to isosceles triangle with the triangle that corresponding dot matrix display device pixel-matrix column direction X or Y constitute.
During actual design, the shape of zigzag projection 124 is not limited to triangle, it also can be other shape, do chamfering or rounding as the drift angle of zigzag projection 124 and handle, perhaps the edge of electrode is waveform curve shown in Figure 5 (forming the structure that zigzag projection 124 and groove 125 are alternately arranged at electrode edge thus).The basic demand of above-mentioned zigzag projection 124 is, its width reduces to its top gradually from its bottom, and wherein the bottom is meant the position that it is connected with electrode body; Accordingly, the width of groove 125 increases to its top gradually from its bottom.
Outside the viewing area 14 of capacitive touch screen, the edge of filling electrode 123 and lead-in wire electrode 122 can indentation, also can be other shape (is straight line or other arbitrary curve as the edge).
In the present embodiment, filling electrode 123 is monoblocks, the edge indentation of its part in viewing area 14.In addition, fill electrode 123 and also can be put together, wherein the edge indentation of the part of each fritter in viewing area 14 by several fritters.The lead-in wire electrode 122 be not limited to as shown in Figure 2 only at the right and left cabling of capacitive touch screen, also can be in the intermediate traces of capacitive touch screen.
Above-mentioned transparent insulating layer 11 is made by the optical clear insulating material, and the optical clear insulating material of employing can be glass, organic glass class rigidity transparent insulation material, for example polymethylmethacrylate (PMMA), polycarbonate (PC); Also can be polyesters transparent insulation material, as polyethylene terephthalate (PET) with soft bendability.
Above-mentioned transparency electrode conductive layer 12 and screen layer 13 are made by transparent conductive material, and the transparent conductive material of employing can be tin indium oxide (ITO), Zinc oxide doped aluminium (ZAO), cadmium oxide (CdO) or indium zinc oxide (IZO).
Because the edge indentation of each electrode, the electrode (as filling electrode 123, lead-in wire electrode 122) that the capacitive touch screen live width is less and the edge orientation and the angled inclination of dot matrix display device pixel array arragement direction in each interelectrode gap 126, therefore, with regard to interference of light, it is the equal of the direction that has changed slit, make the interference fringe of generation not obvious or disappear, effectively weaken or avoid touching face viewing area 14 interference of light phenomenons.
Embodiment 2
As shown in Figure 6 and Figure 7, this capacitive touch screen is from outer extremely interior (when capacitive touch screen is configured on the display device, near a side of display device be the inboard, is the outside away from a side of display device) comprise first transparent insulating layer 21, the first transparency electrode conductive layer 22, isolating separator layer 23, the second transparency electrode conductive layer 24, second transparent insulating layer 25 and screen layer 26 successively.The first transparency electrode conductive layer 22 is located at the medial surface of first transparent insulating layer 21, and the second transparency electrode conductive layer 24 is located at the lateral surface of second transparent insulating layer 25; Isolating separator layer 23 is made by insulating material, makes not conducting between the first transparency electrode conductive layer 22 and the second transparency electrode conductive layer 23; Screen layer 26 is located at the medial surface of second transparent insulating layer 25.
The first transparency electrode conductive layer 22 is made up of three strip induction electrodes 221 and three lead-in wire electrodes 222, three lead-in wire electrodes 222 are electrically connected correspondingly with three strip induction electrodes 221, each strip induction electrode 221 comprises three induction electrode pieces 223, is connected by lead 224 between adjacent two induction electrode pieces 223; The second transparency electrode conductive layer 24 is made up of three strip induction electrodes 241 and three lead-in wire electrodes 242, three lead-in wire electrodes 242 are electrically connected correspondingly with three strip induction electrodes 241, each strip induction electrode 241 comprises four induction electrode pieces 243, is connected by lead 244 between adjacent two induction electrode pieces 243.All strip induction electrodes 221,241 all in the viewing area 27 of capacitive touch screen, lead-in wire electrode 222,242 in viewing area 27 and non-viewing area 28 (being the zone outside the viewing area 27) exist simultaneously.In addition, the quantity of strip induction electrode 221 and lead-in wire electrode 222 can be provided with according to actual needs, and strip induction electrode 221 is identical and corresponding one by one with lead-in wire electrode 222 quantity; The quantity of strip induction electrode 241 and lead-in wire electrode 242 can be provided with according to actual needs, and strip induction electrode 241 is identical and corresponding one by one with lead-in wire electrode 242 quantity; In each strip induction electrode 221 in the quantity of induction electrode piece 223 and each the strip induction electrode 241 quantity of induction electrode piece 243 can be provided with according to actual needs.
Three induction electrode pieces 223 in each strip induction electrode 221 of the first transparency electrode conductive layer 22 are longitudinally arranged, be used for determining lateral coordinates, (edge that is each strip induction electrode 221 has a plurality of zigzag projectioies 225 to the edge indentation of strip induction electrode 221 (comprising induction electrode piece 223 and lead 224), between adjacent two zigzag projectioies 223 groove 226 is arranged), between strip induction electrode 221, form void area; Four induction electrode pieces 243 in each strip induction electrode 241 of the second transparency electrode conductive layer 24 are along transversely arranged, its trend is mutual vertical with strip induction electrode 221 on the first transparency electrode conductive layer 22, be used for determining along slope coordinate, (edge that is each induction electrode 241 has a plurality of zigzag projectioies 245 to the edge indentation of strip induction electrode 241 (comprising induction electrode piece 243 and lead 244), between adjacent two zigzag projectioies 245 groove 246 is arranged), between strip induction electrode 241, form void area; The void area of the strip induction electrode 241 corresponding first transparency electrode conductive layers 22 on the second transparency electrode conductive layer 24, the void area of the strip induction electrode 221 corresponding second transparency electrode conductive layers 24 on the first transparency electrode conductive layer 22, the first transparency electrode conductive layer 22 and the second transparency electrode conductive layer 24 form complementary form, and observation side from capacitive touch screen, form gap 29 between the induction electrode 231 on the induction electrode 221 on the first transparency electrode conductive layer 22 and the second transparency electrode conductive layer 23, lead 224 and lead 244 parts overlap.This capacitive touch screen can be used for single-point touches or multiple point touching operation.
In viewing area 27, (edge of the electrode 222 that promptly respectively goes between has a plurality of zigzag projectioies 227 to the edge indentation of lead-in wire electrode 222,242, between adjacent two zigzag projectioies 227 groove 228 is arranged; The edge of each electrode 242 that goes between has a plurality of zigzag projectioies 247, between adjacent two zigzag projectioies 247 groove 248 is arranged); In non-viewing area 28, the edge of lead-in wire electrode 222,242 can be jagged, also can be shape arbitrarily such as straight-line segment.
In the present embodiment, zigzag projection 225,245,227,247 is all triangular in shape, that is to say, the edge of each electrode is the curve that is in turn connected to form by a plurality of line segments, between adjacent two line segments angle is arranged; The big I of the drift angle of zigzag projection 225,245,227,247 (be the angle of two sides of zigzag projection, be respectively α 1, α 2, α 3, α 4) is selected between 45 °-135 °.
During actual design, the shape of zigzag projection 225,245,227,247 is not limited to triangle, it also can be other shape, do chamfering or rounding processing as the drift angle of zigzag projection 225,245,227,247, perhaps the edge of electrode is a waveform curve (forming the structure that zigzag is protruding and groove is alternately arranged at electrode edge thus) shown in Figure 5.The basic demand of above-mentioned zigzag projection 225,245,227,247 is, its width reduces to its top gradually from its bottom, and wherein the bottom is meant the position that it is connected with electrode body; Accordingly, the width of groove 226,246,228,248 increases to its top gradually from its bottom.
Above-mentioned first transparent insulating layer 21, isolating separator layer 23 and second transparent insulating layer 25 are made by the optical clear insulating material, the optical clear insulating material that adopts can be glass, organic glass class rigidity transparent insulation material, for example polymethylmethacrylate (PMMA), polycarbonate (PC); Also can be polyesters transparent insulation material, as polyethylene terephthalate (PET) with soft bendability.
The above-mentioned first transparency electrode conductive layer 22, the second transparency electrode conductive layer 24 and screen layer 26 are made by transparent conductive material, and the transparent conductive material of employing can be tin indium oxide (ITO), Zinc oxide doped aluminium (ZAO), cadmium oxide (CdO) or indium zinc oxide (IZO).
Because the edge indentation of each electrode, the electrode (as lead-in wire electrode 222, lead 224, lead-in wire electrode 242, lead 244) that the capacitive touch screen live width is less and the edge orientation and the angled inclination of dot matrix display device pixel array arragement direction in each interelectrode gap 29, therefore, with regard to interference of light, it is the equal of the direction that has changed slit, make the interference fringe of generation not obvious or disappear, effectively weaken or avoid touching face viewing area 27 interference of light phenomenons.
Claims (9)
1, a kind of capacitive touch screen, comprise at least one transparent insulating layer and at least one transparency electrode conductive layer, the transparency electrode conductive layer is arranged on the transparent insulating layer, the transparency electrode conductive layer is made up of a plurality of electrodes, it is characterized in that: in the viewing area of described capacitive touch screen, the edge indentation of each electrode on the transparency electrode conductive layer.
2, capacitive touch screen according to claim 1 is characterized in that: in the viewing area of capacitive touch screen, the edge of electrode has a plurality of zigzag projectioies, between adjacent two zigzag projectioies a groove is arranged; The zigzag projection is triangular in shape.
3, capacitive touch screen according to claim 2 is characterized in that: the drift angle size of described zigzag projection is 45 °-135 °.
4, capacitive touch screen according to claim 3 is characterized in that: the drift angle of described zigzag projection is 90 °.
5, according to each described capacitive touch screen of claim 1-4, it is characterized in that: described capacitive touch screen also comprises a screen layer, and screen layer is positioned at the inboard of all transparency electrode conductive layers.
6, capacitive touch screen according to claim 1 is characterized in that: described capacitive touch screen comprises a transparent insulating layer and a transparency electrode conductive layer, and the transparency electrode conductive layer is arranged on the lateral surface of transparent insulating layer; The transparency electrode conductive layer is made up of a plurality of induction electrodes, a plurality of lead-in wire electrode and filling electrode, induction electrode is identical with the lead-in wire number of electrodes and connect correspondingly, fills distribution of electrodes between the induction electrode and the void area between induction electrode and the lead-in wire electrode; In the viewing area of capacitive touch screen, the edge indentation of each induction electrode, lead-in wire electrode and filling electrode.
7, capacitive touch screen according to claim 6 is characterized in that: described capacitive touch screen also comprises a screen layer, and screen layer is arranged on the medial surface of transparent insulating layer.
8, capacitive touch screen according to claim 1 is characterized in that: described capacitive touch screen is from outer extremely interior first transparent insulating layer, the first transparency electrode conductive layer, isolating separator layer, the second transparency electrode conductive layer and second transparent insulating layer of comprising successively; The first transparency electrode conductive layer is located at the medial surface of first transparent insulating layer, and the second transparency electrode conductive layer is located at the lateral surface of second transparent insulating layer; The first transparency electrode conductive layer and the second transparency electrode conductive layer are formed by a plurality of strip induction electrodes and a plurality of lead-in wire electrode, the lead-in wire electrode is electrically connected correspondingly with the strip induction electrode, each strip induction electrode comprises a plurality of induction electrode pieces, is connected by lead between adjacent two induction electrode pieces; A plurality of induction electrode pieces in each strip induction electrode of the first transparency electrode conductive layer longitudinally arrange and each strip induction electrode between form void area, a plurality of induction electrode pieces in each strip induction electrode of the second transparency electrode conductive layer form void area between transversely arranged and each strip induction electrode, the void area of the corresponding first transparency electrode conductive layer of the strip induction electrode on the second transparency electrode conductive layer, the void area of the corresponding second transparency electrode conductive layer of the strip induction electrode on the first transparency electrode conductive layer; In the viewing area, the edge indentation of each strip induction electrode and lead-in wire electrode.
9, capacitive touch screen according to claim 8 is characterized in that: described capacitive touch screen also comprises a screen layer, and screen layer is located at the medial surface of second transparent insulating layer.
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| CNU2009200506342U CN201336029Y (en) | 2009-01-16 | 2009-01-16 | Capacitance touch screen |
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| CNU2009200506342U CN201336029Y (en) | 2009-01-16 | 2009-01-16 | Capacitance touch screen |
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| CN109212799A (en) * | 2018-10-26 | 2019-01-15 | 深圳市华星光电技术有限公司 | The peripheral circuit structure and motherboard of liquid crystal display of liquid crystal display panel |
| CN109212799B (en) * | 2018-10-26 | 2021-10-29 | Tcl华星光电技术有限公司 | Peripheral circuit structure of liquid crystal panel and liquid crystal display mother board |
| CN111399690A (en) * | 2020-04-26 | 2020-07-10 | 无锡变格新材料科技有限公司 | Touch control film layer structure and touch screen |
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