Waterproof touch screen

Abstract

The utility model discloses a waterproof touch screen. The waterproof touch screen comprises a glass protective layer, a conductive layer, a back plate and a waterproof layer, the waterproof layer is composed of four waterproof strips which are sequentially connected end to end, and the waterproof strips are provided with carbon particles and resistance heating wires; the waterproof circuit substrate is provided with a heating circuit, and the heating circuit is provided with a male probe and a female probe. The waterproof layer is arranged on the periphery of the conductive layer, and the carbon particles and the resistance heating wires are arranged in the waterproof strips, so that when water drops permeate along the edge of the capacitive screen, the carbon particles adsorb the water drops, and the water drops are prevented from flowing into the conductive layer to generate short circuit; and under the condition that water exists in the carbon particles, the female probe and the male probe are conducted by the conductivity of the water, so that the heating circuit is communicated to work, the resistance heating wire is electrified to heat and work, the heat is transferred to the carbon particles, and water drops are quickly evaporated, thereby achieving the purpose of effectively preventing water.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screens, and more specifically, to a waterproof touch screen. Background Art

[0002] With the advancement of technology, capacitive touchscreens have gradually replaced traditional resistive touchscreens. Compared to resistive touchscreens, capacitive touchscreens offer greater controllability and sensitivity. Capacitive touchscreens operate by utilizing the body's current sensing. When a finger touches a capacitive screen, the body's electric field creates a coupling capacitor between the user and the touchscreen surface. Capacitors are direct conductors of high-frequency current, so the finger draws a small current from the point of contact. This current flows from electrodes at the four corners of the touchscreen, and the current flowing through these electrodes is proportional to the distance from the finger to the four corners. The main processor accurately calculates the ratio of these four currents to determine the location of the touch point, enabling effective control.

[0003] However, existing capacitive touch screens generally lack a waterproof function. When water drops fall into the capacitive screen, it will quickly cause a short circuit in the internal components of the capacitive screen, resulting in control failure, which brings great trouble to manufacturers and users. Utility Model Content

[0004] The present invention provides a waterproof touch screen to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waterproof touch screen, comprising a glass protective layer, a conductive layer, and a back plate arranged in sequence from top to bottom; a waterproof layer is further provided between the glass protective layer and the back plate, the waterproof layer and the conductive layer are in the same layer, and the waterproof layer is installed around the conductive layer;

[0005] The waterproof layer is composed of four waterproof strips connected end to end in sequence; an upper electrode is provided at one end of the inner side of the waterproof strip, and a lower electrode is provided at the other end, the upper electrode is used to connect to the main processor, and the lower electrode is electrically connected to the waterproof circuit substrate; carbon particles and a resistance heating wire are wrapped inside the waterproof strip; a heating circuit connected to the resistance heating wire is provided on the waterproof circuit substrate, and a male probe and a female probe are provided on the heating circuit, the male probe and the female probe are respectively inserted into the carbon particles, and the male probe and the female probe are separated by a certain gap.

[0006] Preferably, a protrusion is provided at one end of the waterproof strip, and a groove is provided at the other end; the protrusions and grooves between adjacent waterproof strips are engaged with each other.

[0007] Preferably, the carbon particles have a flat structure.

[0008] Preferably, the resistance heating wires are irregularly arranged between the flat carbon particles.

[0009] Preferably, the heating circuit includes a transistor, the collector of the transistor is connected in series with a load R1, and the output end of the load R1 is connected to the input end of the positive power supply on the waterproof circuit substrate; the emitter of the transistor is connected in parallel with a load R2 and the resistance heating wire, and the output end of the load R2 is connected to the input end of the negative power supply on the waterproof circuit substrate; one end of the resistance heating wire is connected to the emitter of the transistor and the negative power supply of the waterproof circuit substrate, and the other end is connected in series with the female probe; the base of the transistor is connected in series with a load R3, and the output end of the load R3 is connected in series with the male probe.

[0010] Preferably, a hydrophobic protective film is provided on the surface of the glass protective layer.

[0011] Preferably, the waterproof circuit substrate is bonded inside the waterproof layer.

[0012] Preferably, adjacent waterproof strips are bonded together by glue.

[0013] Preferably, an alarm device connected to the waterproof circuit substrate is further included, and the alarm device is used to issue an external reminder.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has a reasonable design and a simple structure. By arranging a waterproof layer around the conductive layer and arranging carbon particles and a resistance heating wire inside the waterproof strip, when water droplets penetrate along the edge of the capacitive screen, the carbon particles adsorb the water droplets to prevent the water droplets from flowing into the conductive layer and causing a short circuit; when there is water in the carbon particles, the conductivity of the water will connect the female probe and the male probe, thereby making the heating circuit connected and working, and passing an electric current through the resistance heating wire to make it heat up and work, and the heat is transferred to the carbon particles and the water droplets are quickly evaporated, avoiding the long-term retention of water droplets causing a short circuit in the conductive layer, causing the capacitive screen touch failure, thereby achieving the purpose of effective waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an exploded view of the structure of the waterproof touch screen according to an embodiment of the present invention;

[0016] Figure 2 This is a front view of a waterproof touch screen according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the waterproof strip structure of a waterproof touch screen according to an embodiment of the present utility model;

[0018] Figure 4 This is a side view of a waterproof touch screen according to an embodiment of the present invention;

[0019] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 6 This is a schematic diagram of the heating circuit structure of a waterproof touch screen according to an embodiment of the present utility model;

[0021] exist Figures 1 to 6 , the corresponding relationship between the names of the components and the accompanying drawing numbers is as follows:

[0022] 1--Glass protective layer, 2--Conductive layer, 3--Back plate, 4--Waterproof layer, 41--Waterproof strip, 4101--Protrusion, 4102--Groove, 42--Upper electrode, 43--Lower electrode, 44--Waterproof circuit substrate, 45--Carbon particles, 46--Resistor heating wire, 47--Male probe, 48--Female probe, 49--Transistor, 410--Load R1, 411--Load R2, 412--Load R3, 5--Hydrophobic protective film. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are further described in detail with reference to the accompanying drawings and examples. The accompanying drawings are for reference only and are not intended to limit the scope of the present invention. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention.

[0024] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Please refer to Figures 1 to 6The present invention provides a waterproof touch screen, comprising a glass protective layer 1, a conductive layer 2, and a back plate 3 arranged in sequence from top to bottom; a waterproof layer 4 is further provided between the glass protective layer 1 and the back plate 3, the waterproof layer 4 and the conductive layer 2 are in the same layer, and the waterproof layer 4 is installed around the conductive layer 2;

[0027] The waterproof layer 4 is composed of four waterproof strips 41 connected end to end in sequence; an upper electrode 42 is provided at one end of the inner side of the waterproof strip 41, and a lower electrode 43 is provided at the other end, the upper electrode 42 is used to connect to the main processor, and the lower electrode 43 is electrically connected to a waterproof circuit substrate 44; the interior of the waterproof strip 41 is wrapped with carbon particles 45 and a resistance heating wire 46; a heating circuit connected to the resistance heating wire 46 is provided on the waterproof circuit substrate 44, and a male probe 47 and a female probe 48 are provided on the heating circuit, the male probe 47 and the female probe 48 are respectively inserted into the carbon particles 45, and the male probe 47 and the female probe 48 are separated by a certain gap.

[0028] This embodiment provides a waterproof touch screen, which comprises a glass protective layer 1, a conductive layer 2, and a backplane 3. The glass protective layer 1 and the conductive layer 2 are sequentially superimposed on the upper surface of the backplane 3. A waterproof layer 4 is installed between the glass protective layer 1 and the backplane 3, and around the conductive layer 2. The waterproof layer 4 comprises four waterproof strips 41, which are connected end to end to form a rectangular frame. The waterproof strips 41 are encased in flat carbon particles 45 and resistive heating wires 46. The resistive heating wires 46 are arranged between the carbon particles 45. When in operation, the resistive heating wires 46 heat the surrounding carbon particles 45. An upper electrode 42 is provided at one end of the inner side of the waterproof strips 41, and a lower electrode 43 is provided at the other end. The upper electrode 42 is electrically connected to the main processor, and the lower electrode 43 is electrically connected to a waterproof circuit substrate 44. A heating circuit is fixedly mounted on the waterproof circuit substrate 44, and is connected to the resistive heating wire 46 through the heating circuit to control the operation of the resistive heater. A female probe 48 and a male probe 47 are provided on the heating circuit, and the female probe 48 and the male probe 47 are separated by a certain gap. When water droplets penetrate along the edge of the capacitive screen, the carbon particles 45 in the waterproof strip 41 adsorb the water droplets to prevent the water droplets from flowing into the conductive layer 2 and causing a short circuit; when there is water inside the carbon particles 45, the conductivity of the water will connect the female probe 48 and the male probe 47, thereby making the circuit on the circuit substrate of the waterproof layer 4 connected and working, and passing current to the resistance heating wire 46 to make it heat up. Since the resistance heating wire 46 is arranged in the carbon particles 45, the heat will be transferred to the carbon particles 45, causing it to quickly evaporate the water droplets, avoiding the long-term retention of water droplets causing a short circuit in the conductive layer 2, causing the capacitive screen touch failure, thereby achieving the purpose of effective waterproofing.

[0029] Preferably, the waterproof strip 41 has a raised portion 4101 at one end and a groove 4102 at the other end; the raised portions 4101 and grooves 4102 of adjacent waterproof strips 41 engage with each other. In this embodiment, the raised portion 4101 is provided at one end of the waterproof strip 41, and the raised portion 4101 connects to the grooves 4102 of adjacent waterproof strips 41 through the raised portion 4101. The raised portion 4101 and the adjacent grooves 4102 engage with each other, allowing four waterproof strips 41 to quickly form a structure connected end to end.

[0030] Preferably, the carbon particles 45 are flat in structure. The flat carbon particles 45 can better contact with the resistance heating wire 46 to enhance the heating effect.

[0031] Preferably, the resistance heating wires 46 are irregularly arranged between the flat carbon particles 45. By setting the resistance heating wires 46 in an irregular arrangement structure, they can better contact with the flat carbon particles 45, thereby improving the heating effect.

[0032] Preferably, the heating circuit includes a transistor 49, the collector of the transistor 49 is connected in series with a load R1410, and the output end of the load R1410 is connected to the input end of the positive power supply on the waterproof circuit substrate 44; the emitter of the transistor 49 is connected in parallel with a load R2411 and the resistance heating wire 46, and the output end of the load R2411 is connected to the input end of the negative power supply on the waterproof circuit substrate 44; one end of the resistance heating wire 46 is connected to the emitter of the transistor 49 and the negative power supply of the waterproof circuit substrate 44, and the other end is connected in series with the female probe 48; the base of the transistor 49 is connected in series with a load R3412, and the output end of the load R3412 is connected in series with the male probe 47.

[0033] Through the above structural design, the collector of the transistor 49 is connected in series with the load R1410, and the output end of the load R1410 is connected to the positive power supply input terminal on the waterproof circuit substrate 44; the emitter of the transistor 49 is connected in parallel with the load R2411 and the resistance heating wire 46, and the output end of the load R2411 is connected to the negative power supply input terminal on the circuit substrate of the waterproof strip 41; one end of the resistance heating wire 46 is connected to the emitter of the transistor 49 and the negative power supply terminal of the waterproof circuit substrate 44, and the other end of the resistance heating wire 46 is connected in series with the female probe 48; the base of the transistor 49 is also connected in series with the load R3412, and the output end of the load R3412 is connected in series with the male probe 47. The female probe 48 and the male probe 47 are separated by a certain gap. When water droplets penetrate along the edge of the capacitive screen, the carbon particles 45 in the waterproof strip 41 absorb the water droplets to prevent the water droplets from flowing into the conductive layer 2 and causing a short circuit. When there is water inside the carbon particle layer, the conductivity of the water will connect the female probe 48 and the male probe 47, thereby connecting the circuit on the circuit substrate of the waterproof layer 4 and passing current to the resistance heating wire 46 to make it heat up.

[0034] Preferably, the surface of the glass protective layer 1 is provided with a hydrophobic protective film 5. In this embodiment, the surface of the glass protective layer 1 of the capacitive screen is covered with a hydrophobic protective film 5, which is made of a light-transmitting material to ensure that water droplets cannot contact the glass protective layer 1.

[0035] Preferably, the waterproof circuit substrate 44 is bonded inside the waterproof layer 4 .

[0036] Preferably, adjacent waterproof strips 41 are bonded together by glue. Gluing can further strengthen the connection strength between the waterproof strips 41 and prevent moisture from penetrating into the screen from the connection between the waterproof strips 41.

[0037] Preferably, an alarm device connected to the waterproof circuit substrate 44 is also included to issue an external reminder. By providing the alarm device and connecting it to the waterproof circuit substrate 44, if it detects that the heating component on the waterproof circuit substrate 44 is in an operating state for a long time, indicating that the waterproof strip 41 is wet for a long time, the alarm device will issue an external reminder to remind staff to promptly check the screen and equipment.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has a reasonable design and a simple structure. By arranging a waterproof layer around the conductive layer and arranging carbon particles and a resistance heating wire inside the waterproof strip, when water droplets penetrate along the edge of the capacitive screen, the carbon particles adsorb the water droplets to prevent the water droplets from flowing into the conductive layer and causing a short circuit; when there is water in the carbon particles, the conductivity of the water will connect the female probe and the male probe, thereby making the heating circuit connected and working, and passing an electric current through the resistance heating wire to make it heat up and work, and the heat is transferred to the carbon particles and the water droplets are quickly evaporated, avoiding the long-term retention of water droplets causing a short circuit in the conductive layer, causing the capacitive screen touch failure, thereby achieving the purpose of effective waterproofing.

[0039] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A waterproof touch screen, characterized in that: It comprises a glass protective layer (1), a conductive layer (2) and a back plate (3) arranged in sequence from top to bottom; a waterproof layer (4) is further arranged between the glass protective layer and the back plate, the waterproof layer and the conductive layer are in the same layer, and the waterproof layer is installed around the conductive layer; The waterproof layer is composed of four waterproof strips (41) connected end to end in sequence; an upper electrode (42) is provided at one end of the inner side of the waterproof strip, and a lower electrode (43) is provided at the other end, the upper electrode is used to connect to the main processor, and the lower electrode is electrically connected to the waterproof circuit substrate (44); carbon particles (45) and a resistance heating wire (46) are wrapped inside the waterproof strip; a heating circuit connected to the resistance heating wire is provided on the waterproof circuit substrate, and a male probe (47) and a female probe (48) are provided on the heating circuit, the male probe and the female probe are respectively inserted into the carbon particles, and the male probe and the female probe are separated by a certain gap.

2. The waterproof touch screen according to claim 1, characterized in that: One end of the waterproof strip is provided with a raised portion (4101), and the other end is provided with a groove (4102); the raised portions and grooves between adjacent waterproof strips are engaged with each other.

3. The waterproof touch screen according to claim 1, wherein: The carbon particles have a flat structure.

4. The waterproof touch screen according to claim 3, characterized in that: The resistance heating wires are irregularly arranged between the flat carbon particles.

5. The waterproof touch screen according to claim 1, wherein: The heating circuit includes a transistor (49), the collector of the transistor is connected in series with a load R1 (410), and the output end of the load R1 is connected to the input end of the positive power supply on the waterproof circuit substrate; the emitter of the transistor is connected in parallel with a load R2 (411) and the resistance heating wire, and the output end of the load R2 is connected to the input end of the negative power supply on the waterproof circuit substrate; one end of the resistance heating wire is connected to the emitter of the transistor and the negative power supply of the waterproof circuit substrate, and the other end is connected in series with the female probe; the base of the transistor is connected in series with a load R3 (412), and the output end of the load R3 is connected in series with the male probe.

6. The waterproof touch screen according to claim 1, characterized in that: A hydrophobic protective film (5) is provided on the surface of the glass protective layer.

7. The waterproof touch screen according to claim 1, wherein: The waterproof circuit substrate is bonded to the inside of the waterproof layer.

8. The waterproof touch screen according to claim 1, wherein: Adjacent waterproof strips are bonded together by glue.

9. The waterproof touch screen according to claim 1, wherein: It also includes an alarm device connected to the waterproof circuit substrate, and the alarm device is used to issue an external reminder.

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