Resistive touch screen with three-layer structure
By employing a three-layer structure design and a gas-supported gap design, the poor impact resistance and Newton's rings problem of G+G structure four-wire resistive touch screens have been solved, thereby improving the product's impact resistance and service life.
Patent Information
- Application Number
- CN202520512006.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-21
AI Technical Summary
G+G structure four-wire resistive touch screens have poor impact resistance and are prone to developing Newton's rings, affecting their lifespan and touch performance.
The design employs a three-layer structure, including a cover plate layer, a first conductive circuit layer, a frame layer, and a second conductive circuit layer. The layers are connected by the frame layer, and gas is filled into the gaps to provide support, ensuring uniform spacing between the circuit layers and preventing the formation of Newton's rings.
It improves the touchscreen's impact resistance and product quality, prevents the formation of Newton's rings, and extends its service life.
Smart Images
Figure CN223911236U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of resistance touch screen, especially to a three-layer structure's resistance touch screen. BACKGROUND
[0002] G+G (glass+glass) structure four-wire resistance touch screen is composed of two layers of ITO (indium tin oxide) glass lines, and the upper layer line is processed by 0.2mm thick ITO glass. Compared with the traditional F+G (film+glass) structure four-wire resistance touch screen, it has incomparable service life. The G+G structure four-wire resistance touch screen, because the upper layer is a glass structure, so the ITO of the upper layer line arranged on the upper layer glass is very difficult to be worn in the use process, and therefore the service life of this product can reach 20 years, and the product is very popular in occasions with very high requirements on product service life.
[0003] However, the G+G (glass+glass) structure four-wire resistance touch screen also has serious weaknesses, one of which is poor impact resistance, that is, in order to ensure touch sensitivity, the ITO glass of the upper layer circuit cannot be thick, and can only develop in the direction of ultra-thin, and the ITO glass is too thin, so its mechanical impact resistance will be poor, and it is easy to be broken by external force impact; the second is that Newton's ring is easy to produce on the touch screen, due to the effect of its own gravity, molecular force or electrostatic attraction, the ITO glass at the middle position is easy to bend naturally, so that the spacing between the upper and lower ITO glasses in the touch assembly is not uniform, and Newton's ring is thus produced. SUMMARY
[0004] Therefore, it is necessary to provide a three-layer structure resistance touch screen aiming at at least one of the above problems.
[0005] The three-layer structure resistance touch screen provided by the utility model successively includes: a cover plate layer, a first conductive line layer, a rubber frame layer and a second conductive line layer; the cover plate layer and the first conductive line layer are bonded by optical glue;
[0006] The first conductive line layer and the second conductive line layer are connected through the rubber frame layer, the rubber frame layer is provided with a closable air port, and the space between the rubber frame layers is filled with gas through the air port.
[0007] In one of the embodiments, the surface of the cover plate layer is provided with a polyethylene terephthalate layer.
[0008] In one of the embodiments, the thickness of the polyethylene terephthalate layer is 0.2mm.
[0009] In one of the embodiments, the optical glue is ultraviolet curing optical glue.
[0010] In one of the embodiments, the thickness of the optical glue is 50 μm.
[0011] In one of the embodiments, the first conductive circuit layer and the second conductive circuit layer both comprise indium tin oxide glass and silver wire circuit.
[0012] In one of the embodiments, the thickness of the indium tin oxide glass of the first conductive circuit layer is 0.2 mm, and the thickness of the indium tin oxide glass of the second conductive circuit layer is 0.7 mm or 1.1 mm.
[0013] In one of the embodiments, the first conductive circuit layer and the second conductive circuit layer are both connected with a flexible circuit board.
[0014] The technical scheme provided in the embodiment of the utility model brings the following beneficial technical effects:
[0015] The three-layer structure resistive touch screen provided by the utility model has an internal structure filled with air, which is formed by the first conductive circuit layer and the second conductive circuit layer connected by the glue frame layer, and the gap between the first conductive circuit layer and the second conductive circuit layer is supported by the filled gas, so that the middle part cannot be easily close to each other, thereby avoiding the generation of Newton's ring in the touch screen and improving the product quality of the resistive touch screen.
[0016] The additional aspects and advantages of the present application will be given in the subsequent part and will be understood in detail from the subsequent description or by understanding the specific implementation of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a layered structure schematic view of the three-layer structure resistive touch screen in an embodiment of the utility model;
[0018] Figure 2 It is a plane structure schematic view of the three-layer structure resistive touch screen in an embodiment of the utility model;
[0019] Figure 3 It is a plane structure schematic view of the three-layer structure resistive touch screen after removing the cover plate and the first conductive circuit layer in an embodiment of the utility model.
[0020] EXPLANATION OF REFERENCE NUMERALS:
[0021] 100-cover plate layer, 200-first conductive circuit layer, 300-glue frame layer, 400-second conductive circuit layer;
[0022] 110-optical glue, 310-air port. DETAILED DESCRIPTION
[0023] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The drawings show possible embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein by means of the drawings. The embodiments described by reference to the drawings are exemplary and serve to make the understanding of the disclosure of the present application more thorough and complete, but cannot be interpreted as a limitation of the present application. Furthermore, if a detailed description of the known art is not necessary for the features of the present application shown, these technical details can be omitted.
[0024] Those skilled in the relevant art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as that generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with that in the prior art, and unless specifically defined as such herein, should not be interpreted in an idealized or overly formal sense.
[0025] Those skilled in the art can understand that, unless otherwise stated, the singular forms "a", "an" and "the" used herein also include the plural forms. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features, integers, steps, operations, elements and / or components exist, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their combinations. It should be understood that the phrase "and / or" used herein includes all or any single unit and all combinations of the associated listed items.
[0026] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments.
[0027] The resistance touch screen with three-layer structure provided by the utility model has the internal structure of being filled with air, which is formed by the first conductive circuit layer 200 and the second conductive circuit layer 400 connected by the glue frame layer 300, and the first conductive circuit layer 200 and the second conductive circuit layer 400 are supported by the gap filled with air, so that the first conductive circuit layer 200 and the second conductive circuit layer 400 are kept in balanced spacing, and the generation of Newton's ring in the touch screen is avoided, and the product quality of the resistance touch screen is improved.
[0028] The first conductive circuit layer 200 and the second conductive circuit layer 400 are connected through the glue frame layer 300, the glue frame layer 300 is provided with a closable air port 310, through the air port 310, gas can be filled into the space between the glue frame layer 300, the first conductive circuit layer 200 and the second conductive circuit layer 400 are overlapped and stacked, and are connected and supported through the glue frame layer 300, and are provided with a certain gap between each other, the glue frame layer 300 is a sealed structure except that the air port 310 can be communicated with the outside, so that a spacing space is formed between the first conductive circuit layer 200 and the second conductive circuit layer 400, and the gas such as dry air is introduced into the spacing space through the air port 310, and the air pressure can be slightly greater than the outside, if the air port 310 is not closed, the gas in the spacing space will be sprayed out. Therefore, through the spacing space filled with air, the first conductive circuit layer 200 and the second conductive circuit layer 400 keep balanced spacing, and Newton's ring is avoided.
[0029] The resistance touch screen with three-layer structure provided by the utility model has the internal structure of being filled with air, which is formed by the first conductive circuit layer 200 and the second conductive circuit layer 400 connected by the glue frame layer 300, and the first conductive circuit layer 200 and the second conductive circuit layer 400 are supported by the gap filled with air, so that the first conductive circuit layer 200 and the second conductive circuit layer 400 are kept in balanced spacing, and the generation of Newton's ring in the touch screen is avoided, and the product quality of the resistance touch screen is improved.
[0030] Specifically, in one of the embodiments of the present application, the optical adhesive 110 is an ultraviolet optical adhesive 110. The ultraviolet optical adhesive 110, i.e. SCA, has a wide range of suitable fitting sizes compared to ordinary OCA, and has more advantages in medium and large sizes, strong rework performance, no stickiness on the surface of the SCA optical adhesive 110, easy operation during fitting, fast adjustment, high precision of accurate fitting, and low bubble generation rate under certain heat pressing conditions. The SCA optical adhesive 110 is a neutral product that is not affected by external humidity and water vapor, and can protect the appearance of the product and the stability of the ITO circuit. In one of the optional implementation manners, the thickness of the optical adhesive 110 is 50 μm, the light transmittance is greater than or equal to 98%, and SCA is used. Because of its strong adhesion, it can ensure that the light transmittance of the touch screen reaches more than 80%, and ensure the reliable connection of LEMS and the first conductive circuit layer 200.
[0031] Specifically, in another embodiment of the present application, the first conductive circuit layer 200 and the second conductive circuit layer 400 each include indium tin oxide glass and silver wire circuit. Further, in another embodiment of the present application, the thickness of the indium tin oxide glass of the first conductive circuit layer 200 is 0.2 mm, and the thickness of the indium tin oxide glass of the second conductive circuit layer 400 is 0.7 mm or 1.1 mm. In one embodiment, the first conductive circuit layer 200 and the second conductive circuit layer 400 are each connected to a flexible circuit board. The first conductive circuit layer 200 uses 0.2 mm thick tempered ITO glass, which is composed of ITO circuit and silver wire circuit, and has two lead-out wires connected to the external control circuit through conductive adhesive and FPC. Because this ultra-thin glass has a certain elasticity, the user's touch on the touch surface of the glass can make the upper layer of conductive circuit contact the lower layer of conductive circuit, realizing the touch function. The second conductive circuit layer 400 uses 0.7 mm or 1.1 mm thick ITO glass, which is composed of ITO circuit and silver wire circuit, and also has two lead-out wires connected to the external control circuit through FPC. The upper and lower layers of circuit together form a four-wire resistance touch screen, realizing the electrical function of the four-wire resistance touch screen.
[0032] In combination with the foregoing embodiments, in one specific implementation of the present application, the material of the glue frame layer 300 includes epoxy resin and glass powder. More specifically, the weight ratio of the epoxy resin and the glass powder is 5:1; the maximum particle size of the glass powder is 9 microns. The epoxy resin is printed around the product and used to bond the upper and lower layers of the circuit. The 9-micron glass powder is uniformly mixed in the epoxy resin, and the weight ratio of the glass powder to the epoxy resin is 1:5. After the upper and lower layers of the circuit are completed through the high-temperature pressure solidification process, the distance between the upper and lower layers of the circuit is about 9 microns. Such a distance can not only avoid the consistent spacing between the upper and lower layers of the circuit of the touch screen from generating Newton's rings, but also reduce the operating force of the touch screen (because the spacing between the upper and lower layers of the circuit is small enough, the operator can make the upper and lower layers of the circuit contact by exerting a small force on the touch screen, thereby realizing the touch function).
[0033] The three-layer structure resistance touch screen provided by the present application prevents the middle part of the touch screen from falling and generating Newton's rings under the action of gravity by inflating the cavity of the touch screen at the notch of the annular epoxy resin glue and sealing the notch with sealing glue after inflation. When inflating, the epoxy resin glue notch of the product is upward and placed in the middle of a clamp to avoid the upper and lower layers of the circuit from collapsing during inflation. After inflation, the gas port 310 is plugged with epoxy resin. The support of the gas can prevent the middle part of the touch screen from falling under the action of gravity.
[0034] Those skilled in the art can understand that the terms "first" and "second" discussed in the present application are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.
[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0036] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0037] The above merely describes some embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A three-layer resistive touchscreen, characterized in that, In order, they include: Cover plate layer, first conductive circuit layer, frame layer and second conductive circuit layer; The cover plate layer is bonded to the first conductive circuit layer with optical adhesive. The first conductive circuit layer and the second conductive circuit layer are connected by the frame layer. The frame layer is provided with a sealable vent, through which gas is filled in the space between the frame layers.
2. The resistive touchscreen with a three-layer structure according to claim 1, characterized in that, The surface of the cover plate layer is provided with a polyethylene terephthalate layer.
3. The resistive touchscreen with a three-layer structure according to claim 2, characterized in that, The thickness of the polyethylene terephthalate layer is 0.2 mm.
4. The resistive touchscreen with a three-layer structure according to claim 1, characterized in that, The optical adhesive is a UV-curable optical adhesive.
5. The resistive touchscreen with a three-layer structure according to claim 1, characterized in that, The thickness of the optical adhesive is 50 μm.
6. The resistive touchscreen with a three-layer structure according to claim 1, characterized in that, Both the first conductive circuit layer and the second conductive circuit layer include indium tin oxide glass and silver wire lines.
7. The resistive touchscreen with a three-layer structure according to claim 6, characterized in that, The thickness of the indium tin oxide glass in the first conductive circuit layer is 0.2 mm, and the thickness of the indium tin oxide glass in the second conductive circuit layer is 0.7 mm or 1.1 mm.
8. The resistive touchscreen with a three-layer structure according to claim 1, characterized in that, Both the first conductive circuit layer and the second conductive circuit layer are connected to a flexible circuit board.