TWM572494U - Improved touch glass structure - Google Patents

Abstract

An improved touch glass structure includes sequentially forming a first sensing layer, a first insulating layer, a second sensing layer, a signal wire layer, and a second insulating layer on a glass substrate surface; A plurality of sensing strings are provided, and each sensing string is insulated from each other by a hollowed-out area; the first and second insulating layers have a refractive index of light matching that of the first and second sensing layers, and the first, The insulating material of the two insulating layers can be respectively filled into the hollowed-out areas on the first and second sensing layers; it also includes setting the sensing layer material of the aforementioned hollowed-out area as a dummy pattern; according to this, the light of the overall touch glass structure is improved Refractive index uniformity; further includes providing a light adjustment layer on the surface of the glass substrate to improve the optical characteristics of the touch glass structure.

Description

Improved touch glass structure

This creation relates to a transparent touch glass structure, and more particularly to a transparent capacitive touch glass structure that can improve optical characteristics.

Press, the transparent touchpad is usually configured on the display of the appliance, allowing users to perform interactive input operations to improve the friendliness of the communication interface between humans and machines and improve the efficiency of input operations. Purpose; today ’s widely used touch pads can be divided into resistive, capacitive, infrared, and ultrasonic based on their operating principles and structures. Most of the current mainstream consumer electronics products use multi-point signal sensing. High-performance capacitive sensors to improve touch operation and avoid the lack of previous single-point sensors that are susceptible to scratches and cracks; as is known, capacitive touch panels mainly include X-axis sensing lines X-Trace and Y-Trace can be roughly divided into two structures according to their setting types. The first type of capacitive touchpad structure is to separate the X- and Y-axis sensing lines respectively. The traces are insulated from each other on two different planes. The second type of capacitive touchpad structure is to set the X and Y axis sensing stitches on the same plane and use one of the axis sensing stitches with a bridge structure. Connect; further That is to say, the first type of capacitive touchpad structure has two layers of transparent conductive film, such as indium tin oxide (ITO) material, and the required capacitance sensing unit is provided on each layer of conductive film, that is, a plurality of capacitors. The X-axis induction stitches and Y-axis induction stitches formed by the connection of the sensing unit are usually etched to remove unnecessary parts of the conductive film to form the required X-axis and Y-axis induction stitches, and make each induction stitch Keep a gap of appropriate width between each other to achieve the purpose of insulation setting. However, the electrode areas where the induction stitches are provided on the conductive film and the hollow areas of the etch-removed material have different transmittances. The light that penetrates the conductive film is not uniformly refracted. This result will cause obvious graphics or lines when viewed by the human eye. Especially when it is used in front of the display screen, it will cause the screen image to be distorted and blurred. ; The second type of capacitive touchpad structure is a capacitive induction sheet with a plurality of X-axis traces and Z-axis traces arranged in a matrix staggered manner on a transparent conductive film. Element, and connect each capacitive sensing unit on one of the axial stitches (for example, X-axis trace) to each other, and each capacitive sensing unit on the other axial stitch (for example, Y-axis trace) They are arranged at intervals from each other, and then a block-shaped insulating film is overlaid on the intervals, and two adjacent capacitive sensing units are connected across an electrical wire, so that the capacitive sensing units on the same axial line trace are mutually It is electrically connected, and accordingly, the plurality of X-axis traces and the Z-axis traces are set on the conductive film on the same layer; however, the light transmittance of the portion where the insulating film is provided on the conductive film results in penetration of the conductive film Uneven refraction of light causes visible patterns or textures when viewed by the human eye, which interferes with the quality of the image displayed on the screen. In summary, it is known that the conventional capacitive touchpad structure is prone to produce interference patterns or uneven light refraction The problem of lines is urgent to be overcome.

The main purpose of this creation is to provide a touch glass structure that can improve the visibility. By using an insulating material that matches the refractive index (RI) with the sensing layer material as the insulating layer, the Insulating material is filled into the space of the material removal part on the sensing layer, and the non-capacitive sensing unit area of the sensing layer is set as a dummy pattern to improve the uniform light refractive index of the overall touch glass structure. And improve the problem of disturbing the screen display image.

Another purpose of this creation is to provide a touch glass structure that can reduce glare and enhance optical characteristics. It has a light adjustment layer that can suppress reflected light caused by strong external light and prevent glare and glare, so that the performance of the screen display image is obtained. High contrast ratio and good visibility.

In order to achieve the above purpose, the present invention provides an improved touch glass structure, which mainly comprises sequentially forming a first sensing layer, a first insulating layer, a second sensing layer, a signal wire layer, and a second layer on a glass substrate surface. Insulating layer; wherein the glass substrate can be made of glass material with high light transmittance, such as soda lime silicate glass, soda borosilicate glass, lead crystal glass, aluminosilicate glass, low iron glass, etc. However, the scope of implementation is not limited to the aforementioned materials; a perimeter color frame is provided on the peripheral edge area of one surface of the glass substrate, and the color frame is used to define a frame on the glass substrate at the peripheral edge portion. Type of sheltered area and a viewable area in the center. The first and second sensing layers are both made of conductive materials with high light transmittance, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc aluminum oxide (AZO), or polyethylene dioxythiophene ( PEDOT) and other thin films; the first sensing layer has a plurality of first sensing strings arranged along the first axis, and each of the first sensing strings is separated from each other by a hollow area to form The second sensing layer has a plurality of second sensing strings arranged along the second axis, and each of the second sensing layers is hollowed out. The areas are insulated from each other by being separated from each other, and a second overlapping point is provided at one end thereof. The first and second insulating layers are transparent insulating materials having substantially the same refractive index (RI, Refractive Index) or similar to the first and second sensing layers, such as silicone or epoxy (Epoxy) series, acrylic resin (Acrylic) and other high molecular polymer materials, but the scope of implementation is not limited to the foregoing materials; wherein the first insulating layer is provided with a plurality of through holes, the through holes are exactly Each of which may correspond to a plurality of the first overlapping points, and the first insulating layer is disposed on a surface of the first sensing layer, and an insulating material is filled into the hollowed-out area on the first sensing layer; The second insulating layer is disposed on a surface of the second sensing layer, and an insulating material is filled into a hollowed-out area on the second sensing layer. The signal wire layer is disposed in a range of the shielding area, and includes a plurality of first signal transmission lines and a plurality of second signal transmission lines; wherein each of the first transmission signal lines connects with the first through the through hole. The contacts are electrically connected, and the ends of the first transmission signal lines are electrically connected to the first signal output contacts; individual second transmission signal lines are electrically connected to the second overlap points, and the The end of the second transmission signal line is electrically connected to the second signal output contact; the signal wire layer is a low-resistivity electrical wire material, such as gold, silver, copper, aluminum, molybdenum, nickel, or an alloy of the foregoing materials Or silver paste printing lines, but the types of materials used are not limited to the aforementioned implementation scope.

In particular, a conductive material that is not included in the area of the first sensing series and is also included on the first sensing layer is set as a dummy pattern, and the dummy patterns are composed of a plurality of each other. It is composed of non-connected small areas, and the equal small areas are insulated from each other by being separated by a space; preferably, the width of the space is 200 μm or less, and more preferably, the width of the space is 100 μm or less; It is hexagonal, triangular, rectangular, trapezoidal, elongated, polygonal, circular, and other geometric figures, and the imitation pattern may be composed of one or more geometric shapes.

In particular, it further comprises providing a light adjustment layer on one surface of the glass substrate. The light adjustment layer is composed of one or more optical films, which is selected from the group consisting of antireflection film, fogging film, and polarization. One or two or more kinds of optical films such as a film or a retardation film are laminated and combined, but the implementation range is not limited to the aforementioned film types.

This will further clarify the other functions and technical features of this creation below. Those skilled in the art will be able to realize this creation after reading the description in the article.

As shown in Figures 1 to 6 attached below, a touch glass structure according to a preferred embodiment of the present invention includes a glass substrate 10, a first sensing layer 20, a first insulating layer 30, a first The two sensing layers 40, the signal wiring layer 50, and the second insulating layer 60.

The glass substrate 10 is a thin glass plate with high light transmittance having excellent mechanical strength. For example, the glass substrate 10 is a soda lime silicate glass with a refractive index (RI) of about 1.5. An opaque color frame 11 is provided. The color frame 11 is a thin film layer formed of an insulating material. The foregoing insulating material can be selected from materials such as ink or photoresist, and is insulated by implementing technical means such as printing and coating. The material is disposed on the surface of the glass substrate 10, but the embodiment is not limited to this; the color frame 11 is used to define the glass substrate 10 on the glass substrate 10 to form a frame-shaped shielding area 11a at the peripheral portion and a predictable center portion District 11b. In addition, a light adjustment layer 12 is also provided on the surface of the glass substrate 10. The light adjustment layer 12 is composed of one or more optical films. The configuration of the light adjustment layer 12 is arbitrary and can be selected. Adjust and change freely according to the use conditions of the touchpad, thereby improving the image display effect through the touchpad. For example, when the light adjustment layer 12 is an anti-reflection coating, the light reflection can be reduced. The optical coating on the surface that increases the transmittance of visible light improves the contrast by reducing the scattered light, so as to reduce the loss of light flux and the interference of light scattering; the light adjustment layer 12 can also use a polarizing film for outdoor use A person can clearly see the image display content through the touch panel without feeling dazzling; when the light-adjusting layer 12 is an atomized film, it can reduce light reflection and interfere with the image display.

As shown in FIG. 5, the first sensing layer 20 is made of a conductive material with high light transmittance, for example, indium tin oxide (ITO) having a refractive index of RI ≒ 1.54. The first sensing layer 20 is an X-axis sensing layer. It is arranged in the viewable area 11b of the aforementioned glass substrate, and includes several rows of first induction series 21 (ie, X-axis induction series). Each first induction series 21 is composed of a plurality of rhombus-shaped first capacitors. The sensing units 21a are arranged in series along the first direction (ie, the X-axis direction). One end of each row of the first sensing series 21 is provided with a first overlap point 21b. In addition, at the first The conductive material in the area included in the non-first sensing series 21 on the sensing layer 20 is set as an imitation pattern (see FIG. 6). The imitation pattern is composed of a plurality of polygonal small areas 22 a which are not connected to each other. Composition, each polygonal small area is insulated from each other by being separated by a space 22b, the width of which is approximately 50 μm and its setting depth can just completely cut off the first sensing layer 20; using the setting of the imitation pattern to Improving the appearance flatness and uniformity of light transmittance of the first sensing layer, and by means of a small division area In order to reduce the noise capacitance value in this area, to obtain excellent electrical characteristics.

The first insulating layer 30 is an insulating material with good insulation efficiency and having substantially the same refractive index of light or similar to the aforementioned first sensing layer 20, for example, a siloxane positive transparent coating using a refractive index RI ≒ 1.53 Material; the first insulating layer 30 is provided on the surface of the first sensing layer 20, and the insulating material is filled into the space 22b on the first sensing layer 20 to improve the uniformity of the refractive index of the light of the sensing layer; An insulating layer is provided with a plurality of through-holes 31, and the through-holes 31 may correspond to the first overlapping points 21b respectively.

The second sensing layer 40 is the same as the aforementioned first sensing layer 20 and is made of a high-transmittance conductive material, such as indium tin oxide (ITO) with a refractive index of RI ≒ 1.54; the second sensing layer 40 is a Y-axis sensing Layer, which is disposed in the viewable area 11b of the aforementioned glass substrate, and includes several rows of the second induction series 41 (ie, the Y-axis induction series). Each of the first induction series 41 has a hollow area 42 between them. The second sensing series 41 are separated from each other to be insulated, and each of the second sensing series 41 is composed of a plurality of rhombus-shaped second capacitive sensing units 41a arranged in a row along the second direction (ie, the Y-axis direction). One end of each row of the second sensing series 41 is provided with a second overlapping point 41b.

The signal wire layer 50 is a low-resistivity electrical wire material, such as a wire material made of aluminum or molybdenum. The signal wire layer 50 is disposed within the shielding area 11 a of the glass substrate 10 and includes a plurality of first signal transmission lines. 51 (that is, the X-axis inductive signal transmission line) and a plurality of second signal transmission lines 52 (that is, the Y-axis inductive signal transmission line); wherein individual first transmission signal lines 51 can pass through the through holes 31 in the first insulating film The first connection point 21b of the first induction series is electrically connected, and the end of the first transmission signal line 51 is electrically connected to the first signal output contact 51a. Individual second transmission signal lines 52 are respectively connected to the second induction line. The second lap joint 41b in series is electrically connected, and the end of the second transmission signal line 52 is electrically connected to the second signal output joint 52a; the first and second signal output joints 51a and 52a can be connected to a signal The cable (not shown) is electrically connected, and the touch signal is transmitted to a signal processing circuit (not shown) for calculation.

The second insulating layer 60 is the same as the aforementioned first insulating layer 30. The second insulating layer 60 is made of an insulating material with good insulation efficiency and substantially the same refractive index of light or similar to the aforementioned first and second sensing layers 20 and 40. ≒ 1.53 siloxane positive transparent coating material; the second insulating layer 60 is provided on the surface of the second sensing layer 40, and the insulating material is filled in the non-second sensing series 41 on the second sensing layer 40 The hollowed-out area 42 is included to improve the uniformity of the refractive index of the light of the sensing layer. In addition, a transparent film with strong characteristics can also be optionally provided on the second insulating layer 60. The strong transparent film is used to protect the touch sensing circuit and form a glass explosion-proof structure. The material of the tough transparent film can be selected from polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polypropylene (PP), polyetheretherketone (PEEK ), Polyfluorene (PSF), polyether fluorene (PES), polycarbonate (PC), cycloolefin copolymer (COC / COP), polyamide, polyimide, acrylic resin, vinyl series resin, and Trivinyl cellulose (TAC), etc., but the scope of implementation is not limited to the aforementioned materials.

According to this creation, by selecting the first induction layer 20, the first insulation layer 30, the second induction layer 40, and the second insulation layer 60 having a matching refractive index, and filling the first insulating layer 30 with an insulating material The space 22b on the sensing layer 20 and the insulating material of the second insulating layer 60 are filled into the hollowed-out area 42 on the second sensing layer 40, thereby improving the uniformity of the refractive indices of the first and second sensing layers 20 and 40 to reach For the purpose of improving the optical characteristics of the overall touch glass structure, in addition, the aforementioned insulating material is filled into the space 22b to form the first insulating layer 30 as a flat surface, and the second sensing layer 40 is superposed on the flat surface to avoid causing a conductive film. The layer breaks, leading to the lack of open signal transmission (OPEN) phenomenon. In addition, the creation uses the setting of the light adjustment layer 12 to reduce the loss of light flux and light scattering interference, and can suppress reflected light caused by strong external light and prevent glare The glare phenomenon improves the visibility of the touch glass structure.

Although the present invention has been fully explained with reference to the accompanying drawings and specific embodiments, it should be understood that the foregoing embodiments are merely implementation examples for further explanation, and the implementation manner of this creation is not limited to the description. Those skilled in the art will understand that Various changes and modifications; and such changes and modifications should be understood to be included in the scope of this creation as defined by the scope of the accompanying patent application.

10‧‧‧ glass substrate

11‧‧‧color border

11a‧‧‧ sheltered area

11b‧‧‧viewable area

12‧‧‧light adjustment layer

20‧‧‧ the first induction layer

21‧‧‧The first induction series

21a‧‧‧The first capacitive sensing unit

21b‧‧‧First Lap Point

22a‧‧‧Small area

22b‧‧‧ interval

30‧‧‧first insulating layer

31‧‧‧through hole

40‧‧‧Second sensing layer

41‧‧‧Second induction series

41a‧‧‧Second capacitive sensing unit

41b‧‧‧Second Lap Point

42‧‧‧ hollowed out area

50‧‧‧Signal conductor layer

51‧‧‧first signal transmission line

51a‧‧‧First signal output contact

52‧‧‧Second signal transmission line

52a‧‧‧Second signal output contact

60‧‧‧Second insulation layer

Figure 1 is a component separation diagram of the layered architecture of this creation. Figure 2 is a plan view of the component assembly of the creation. Fig. 3 is a side sectional view of the A-A portion of Fig. 2. Fig. 4 is a side sectional view of a portion B-B in Fig. 2. FIG. 5 is a plan view of a first sensing layer of the creation. FIG. 6 is an enlarged view of part C of FIG. 5, describing the setting of the imitation pattern.

Claims (10)

An improved touch glass structure is characterized by comprising: a glass substrate, which is a glass plate with high light transmittance, and an opaque color frame is provided on a peripheral edge region of one surface of the glass substrate. The color frame defines a frame-shaped shielding area formed on a peripheral portion of the glass substrate and a viewable area on a central portion; a first sensing layer, which is a conductive film with high light transmittance, The sensing layer has a plurality of first sensing strings arranged along the first axis. Each of the first sensing strings is insulated from each other by a hollowed-out area, and a first A lap joint; a first insulating layer having a refractive index substantially the same as that of the first sensing layer; a plurality of through holes are provided on the first insulating layer, and the through holes correspond to the plurality of A first overlap point, and the first insulating layer is disposed on a surface of the first sensing layer, and an insulating material is filled into the hollowed-out area on the first sensing layer; the second sensing layer is A high light transmittance conductive thin A film having a plurality of second induction strings arranged along the second axis on the second induction layer, each of the second induction strings is insulated from each other by a hollowed-out area, and A second overlapping point is provided at one end portion thereof; a signal conducting wire layer is provided in the range of the shielding area, and the signal conducting wire layer includes a plurality of first signal transmission lines and a plurality of second signal transmission lines, wherein each of the first A transmission signal line is electrically connected to the first overlapping point through the through hole, and an end of the first transmission signal line is electrically connected to a first signal output contact, and the second transmission signal line is individually Are electrically connected to the second lap joint, and the ends of the second transmission signal line are electrically connected to the second signal output joint; and a second insulation layer having substantially the same as the second induction layer Refractive index of the light, the second insulating layer is disposed on a surface of the second sensing layer, and an insulating material is filled into the hollow region on the second sensing layer. The improved touch glass structure according to claim 1, wherein the material of the first sensing layer and the second sensing layer is selected from indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, or Polyethylenedioxythiophene. The improved touch glass structure according to claim 1, wherein the material of the first insulating layer and the second insulating layer is selected from polymers of siloxane, epoxy resin, and acrylic resin. Polymer material. The improved touch glass structure according to claim 1, wherein the material of the signal wire layer is selected from gold, silver, copper, aluminum, molybdenum, nickel, or an alloy of the foregoing materials or a silver paste printed wire. The improved touch glass structure according to claim 1, wherein the color frame is a thin film layer formed of an insulating material, and the insulating material is selected from ink or photoresist. The improved touch glass structure according to claim 1, further comprising a conductive material on the first sensing layer that is not included in the area of the first sensing series and is configured as a pattern. The imitation pattern is composed of a plurality of small areas that are not connected to each other, and the plurality of small areas are insulated from each other by being spaced apart from each other. The improved touch glass structure according to claim 6, wherein the width of the space is 200 μm or less. The improved touch glass structure according to claim 6, wherein the small area is a hexagon, a triangle, a rectangle, a trapezoid, a bar, a polygon, a circle, or one or more of the aforementioned geometric areas Co-founder. The improved touch glass structure according to claim 1, further comprising: providing a light adjustment layer on a surface of the glass substrate. The improved touch glass structure according to claim 9, wherein the light adjustment layer is composed of one or more optical films, and the optical film is selected from the group consisting of an antireflection film and a haze. Optical film, polarizing film, retardation film and other optical films, or a combination of two or more films.