Low-temperature-resistant large-size touch screen and processing method thereof

Abstract

The invention relates to the technical field of touch screens, in particular to a low-temperature-resistant large-size touch screen and a processing method thereof.The low-temperature-resistant large-size touch screen comprises a substrate, a heating electrode block and a panel, the substrate is provided with a touch electrode block, the edge of the substrate is provided with a first temperature sensor, the heating electrode block is arranged on the substrate and folded to surround a touch electrode, and the panel is provided with a second temperature sensor; the panel is adhered to the substrate through the optical adhesive layer, the heating electrode blocks are arranged to ensure that the equipment can normally operate in a low-temperature environment and directionally heat a touch sensitive area, the energy consumption is lower, the heating electrode blocks are compatible with an existing touch process, core materials do not need to be replaced, the technological process is relatively simple, and the cost is low. Through local heating and the uniform heat assembly arranged at the folding position of the heating electrode block, heat accumulation at the folding position is avoided, the temperature difference between the blank folding position close to the heating electrode block and the heating folding position far away from the heating electrode block is reduced, and the interlayer stripping risk caused by the thermal expansion difference of the whole material is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screens, and specifically relates to a large-size touch screen with low-temperature resistance and a processing method thereof. Background Art

[0002] Large-size touch screens are widely used, such as vending machines and outdoor billboards commonly seen outdoors. Since they are to be used outdoors, in cold northern regions, the winter temperature sometimes reaches below -40°C, which is lower than the normal operating temperature range of traditional touch display screens, i.e., -20°C to 75°C. Since the temperature is already lower than the limit operating temperature of traditional touch display screens, traditional touch display screens will have abnormal problems such as lag, touch failure, touch "ghost points", and display afterimages, resulting in poor user experience and even loss of basic control and display functions. Therefore, it is necessary to provide a large-size touch screen with low-temperature resistance and a processing method thereof to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-size touch screen with low-temperature resistance and a processing method thereof to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A large-size touch screen with low-temperature resistance, comprising:

[0006] A substrate, on which touch electrode blocks are arranged, and a first temperature sensor is arranged at the edge position of the substrate;

[0007] Heating electrode blocks, which are arranged on the substrate and folded around the touch electrode blocks;

[0008] A panel, which is adhered to the substrate through an optical adhesive layer. When the first temperature sensor detects that the temperature is lower than the first set temperature, the heating electrode blocks are activated to heat the touch electrode blocks. When the first temperature sensor detects that the temperature is higher than the second set temperature, the heating electrode blocks stop heating.

[0009] Preferably, a heat equalizing cavity is formed in the substrate, and a heat equalizing component is arranged in the heat equalizing cavity.

[0010] Preferably, the heat equalizing component includes a heat conducting mechanism arranged on the inner wall of the heat equalizing cavity and ventilation mechanisms arranged at both ends of the heat conducting mechanism.

[0011] Preferably, the heat conduction mechanism includes a heat - equalizing block disposed on the substrate and in the middle of the folded portion of the heating electrode block, a heat conduction column embedded in the substrate and attached to the heat - equalizing block, a heat - dissipating vertical plate disposed on the heat conduction column, heat - dissipating fins disposed on the heat - dissipating vertical plate, and a second temperature sensor disposed in the heat conduction column.

[0012] Preferably, the ventilation mechanism includes a flow - guiding plate disposed on the heat - equalizing plate, a fan disposed on the flow - guiding plate, a mounting block disposed on the inner wall of the heat - equalizing cavity, a ventilation door disposed on the mounting block, an arc - shaped sliding block disposed on the mounting block, a pull plate disposed on the ventilation door, a telescopic rod disposed on the inner wall of the heat - equalizing cavity, and a ventilation hole opened on the side wall of the substrate.

[0013] Preferably, when the second temperature sensor detects that the temperature is higher than the set temperature three, the telescopic rod drives the ventilation door to rotate along the arc - shaped sliding block, causing the arc - shaped sliding block to tilt, and the fan is turned on to draw air from one ventilation hole, pass it through the heat - dissipating fins, and discharge it from the other ventilation hole. When the second temperature sensor detects that the temperature is lower than the set temperature two, the fan stops and the telescopic rod drives the ventilation door to return to its original position, separating the heat - dissipating fins from the ventilation holes.

[0014] Preferably, a heat - insulating pad is laid on the inner wall of the heat - equalizing cavity.

[0015] Preferably, the substrate is provided with a sealing plate for sealing the heat - equalizing cavity.

[0016] A processing method for a large - size touch screen with low - temperature resistance based on any one of the above, includes:

[0017] S1: Printing the touch - control electrode block and the heating electrode block on the substrate;

[0018] S2: Printing the heat - equalizing block on the part of the substrate where the heat - conduction column is embedded, laying the optical adhesive layer on the substrate, and adhering the panel;

[0019] S3: Laying and pasting the heat - insulating pad in the heat - equalizing cavity;

[0020] S4: Placing the heat - dissipating vertical plate on the heat - insulating pad in the heat - equalizing cavity and connecting it to the heat - conduction column, and installing the heat - dissipating fins between the heat - conduction main boards;

[0021] S5: Installing the flow - guiding plate, the fan, and the ventilation door in sequence, and connecting the telescopic rod to the ventilation door;

[0022] S6: Filling the heat - insulating pad in the gaps of the heat - equalizing cavity, and installing the sealing plate on the substrate.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] Through the setting of the heating electrode block, the present invention ensures that the device can operate normally in a low-temperature environment and can heat the touch-sensitive area directionally, with lower energy consumption. The heating electrode block is compatible with the existing touch process, without the need to replace the core materials, and the process flow is relatively simple. Through local heating and the heat equalizing component arranged at the folding part of the heating electrode block, the accumulation of heat at the folding part is avoided, the temperature difference between the blank folding part with a relatively short distance and the heating folding part with a relatively long distance is reduced, and the risk of interlayer peeling caused by the overall material thermal expansion difference is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic structural diagram of the present invention after hiding the panel and the optical glue layer;

[0027] Figure 3 is a schematic cross-sectional structural diagram of the present invention;

[0028] Figure 4 is Figure 3 an enlarged schematic diagram of the structure of area A in

[0029] Figure 5 is a schematic structural diagram of the heat equalizing cavity of the present invention;

[0030] Figure 6 is a schematic structural diagram of the heat conduction mechanism and the ventilation mechanism of the present invention;

[0031] Figure 7 is a schematic cross-sectional structural diagram of the ventilation door of the present invention.

[0032] In the figures: 1, substrate; 2, touch electrode block; 3, heating electrode block; 4, panel; 5, optical glue layer; 6, heat equalizing cavity; 7, heat equalizing block; 8, heat conduction column; 9, heat dissipation vertical plate; 10, heat dissipation fin; 11, flow guiding plate; 12, fan; 13, mounting block; 14, ventilation door; 15, arc-shaped slider; 16, pulling plate; 17, telescopic rod; 18, ventilation hole; 19, heat insulation pad; 20, sealing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 7 , the present invention provides a technical solution:

[0035] A low-temperature resistant large-size touch screen, comprising:

[0036] A substrate 1, on which a touch electrode block 2 is provided. The touch electrode block 2 is formed on the surface of the substrate 1 by printing silver paste and laser engraving. The touch electrode block 2 realizes the touch function by connecting a touch channel. A first temperature sensor is arranged at the edge position of the substrate 1, and the first temperature sensor is fixedly connected to the substrate 1 by means of adhesion or the like.

[0037] A heating electrode block 3, which is arranged on the substrate 1 and folded around the touch electrode block 2. The heating electrode block 3 is on the surface of the substrate 1 by printing silver paste and laser engraving. The heating electrode block 3 is connected to a heating channel, and the heating channel is used to supply power to the heating electrode block 3. The heating electrode block 3 and the touch electrode block 2 are arranged in the same conductive layer to ensure that the two are isolated from each other to avoid signal interference.

[0038] A panel 4, which is adhered to the substrate 1 by setting an optical adhesive layer 5. The optical adhesive layer 5 wraps the touch electrode block 2 and the heating electrode block 3. A single-chip microcomputer and a temperature control IC are also arranged on the substrate 1. The temperature control IC communicates with the single-chip microcomputer through a data electrical signal, so that the temperature control IC is used to control the power on and off of the heating channel. When the first temperature sensor detects that the temperature is lower than the first set temperature, the heating electrode block 3 is started to heat the touch electrode block 2. When the first temperature sensor detects that the temperature is higher than the second set temperature, the heating electrode block 3 stops heating. The first set temperature and the second set temperature can be reasonably selected according to the actual use scenario.

[0039] A uniform heat chamber 6 is provided in the substrate 1, and an insulation pad 19 is laid on the inner wall of the uniform heat chamber 6. The insulation pad 19 is fixedly connected to the inner wall of the uniform heat chamber 6 by gluing or the like. A uniform heat assembly is provided in the uniform heat chamber 6, and the uniform heat assembly includes a heat conducting mechanism provided on the inner wall of the uniform heat chamber 6 and a ventilation mechanism provided at both ends of the heat conducting mechanism. The heat conducting mechanism includes a uniform heat block 7, a heat conducting column 8, a heat dissipation riser 9, a heat dissipation fin 10, and a temperature sensor 2. The heat conducting block is embedded in the substrate 1 and fits with the uniform heat block 7. The heat conducting column 8 is fixedly connected to the substrate 1 by gluing or the like. The uniform heat block 7 is provided on the substrate 1 and is located at the heating electrode At the gap of the folded part of the pole piece 3, the uniform heat block 7 is formed on the surface of the substrate 1 and the heat-conducting column 8 by printing silver paste and laser engraving. The heat-conducting column 8 is provided with several rows with the same number as the uniform heat block 7. The heat dissipation vertical plate 9 is provided on the heat-conducting column 8. The heat dissipation vertical plate 9 is fixedly connected to the heat-conducting column 8 by welding or the like. The heat dissipation fins 10 are provided on the heat dissipation vertical plate 9. The heat dissipation fins 10 are fixedly connected to the heat dissipation vertical plate 9 by welding or the like. The second temperature sensor is provided in the heat-conducting column 8. The second temperature sensor is embedded and fixed in the heat-conducting column 8. The second temperature sensor is connected to the single-chip microcomputer through the temperature control IC.

[0040] The ventilation mechanism includes a diversion plate 11, a fan 12, a mounting block 13, a ventilation door 14, an arc-shaped slider 15, a pull plate 16, a telescopic rod 17, and a ventilation hole 18. The diversion plate 11 is arranged on the heat equalizing plate and is fixedly connected to the heat equalizing plate by welding or other means. The fan 12 is arranged on the diversion plate 11 and is fixedly connected to the diversion plate 11 by setting screws or other means. One of the fans 12 at both ends is an intake fan, and the other is an exhaust fan. The mounting block 13 is arranged on the inner wall of the heat equalizing cavity 6 and is fixedly connected to the inner wall of the heat equalizing cavity 6 by setting bolts and is closely attached to the heat insulation pad 19. The ventilation door 14 is arranged on the mounting block 13 and is rotatably connected to the mounting block 13 by setting a rotating shaft or other means. The arc-shaped slider 15 is arranged on the mounting block 13 and is fixedly connected to the mounting block 13 by welding or other means and is closely attached to the heat insulation pad 19. The ventilation door 14 is made of elastic rubber material. When the ventilation door 14 is vertical, it is closely attached to the arc-shaped slider 15, the mounting block 13, and the heat insulation pad 19. The pull plate 16 is arranged on the rotating shaft of the ventilation door 14 and is fixedly connected to the rotating shaft of the ventilation door 14 by welding or other means. The telescopic rod 17 is fixedly connected to the inner wall of the heat equalizing cavity 6 by setting screws and is movably connected to a pull groove formed on the pull plate 16 by setting a rotating shaft or other means. The ventilation hole 18 is opened on the side wall of the substrate 1. The substrate 1 is provided with a sealing plate 20. The sealing plate 20 is used to seal the heat equalizing cavity 6 and is fixedly connected to the substrate 1 by setting screws and a sealing ring or other means. When the second temperature sensor detects that the temperature is higher than the set temperature three, the telescopic rod 17 drives the ventilation door 14 to rotate along the arc-shaped slider 15, making the arc-shaped slider 15 tilt, and the fan 12 is turned on. Air is drawn in from one ventilation hole 18, passes through the heat dissipation fins 10, and is discharged from the other ventilation hole 18. When the second temperature sensor detects that the temperature is lower than the set temperature two, the fan 12 stops and the telescopic rod 17 drives the ventilation door 14 to return to its original position, separating the heat dissipation fins 10 from the ventilation holes. The set temperature three is reasonably selected according to the actual usage scenario.

[0041] Working principle: When in use, when the first temperature sensor detects that the temperature is lower than the set temperature one, the heating electrode block 3 is started to heat the touch electrode block 2. When the first temperature sensor detects that the temperature is higher than the set temperature two, the heating electrode block 3 stops. When the second temperature sensor detects that the temperature is higher than the set temperature three, the telescopic rod 17 drives the ventilation door 14 to rotate along the arc-shaped slider 15, making the arc-shaped slider 15 tilt, and the fan 12 is turned on. Air is drawn in from one ventilation hole 18, passes through the heat dissipation fins 10, and is discharged from the other ventilation hole 18. When the second temperature sensor detects that the temperature is lower than the set temperature two, the fan 12 stops and the telescopic rod 17 drives the ventilation door 14 to return to its original position, separating the heat dissipation fins 10 from the ventilation holes.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature resistant large-size touch screen, characterized in that, Comprising: A substrate, on which a touch electrode block is provided, and a first temperature sensor is provided at an edge position of the substrate; A heating electrode block, which is provided on the substrate and folded around the touch electrode block; A panel, which is adhered to the substrate by an optical adhesive layer. When the first temperature sensor detects that the temperature is lower than a first set temperature, the heating electrode block is activated to heat the touch electrode block. When the first temperature sensor detects that the temperature is higher than a second set temperature, the heating electrode block stops heating.

2. The large-size touch screen resistant to low temperature according to claim 1, wherein: A heat - uniforming cavity is formed in the substrate, and a heat - uniforming component is provided in the heat - uniforming cavity.

3. The large-size touch screen resistant to low temperature according to claim 2, wherein: The heat - uniforming component includes a heat - conducting mechanism provided on the inner wall of the heat - uniforming cavity and a ventilation mechanism provided at both ends of the heat - conducting mechanism.

4. The large-size touch screen resistant to low temperature according to claim 3, characterized in that: The heat - conducting mechanism includes a heat - uniforming block provided on the substrate and in the middle of the folded part of the heating electrode block, a heat - conducting column embedded in the substrate and attached to the heat - uniforming block, a heat - dissipating vertical plate provided on the heat - conducting column, heat - dissipating fins provided on the heat - dissipating vertical plate, and a second temperature sensor provided in the heat - conducting column.

5. The large-size touch screen resistant to low temperature according to claim 4, wherein: The ventilation mechanism includes a diversion plate provided on the heat - uniforming plate, a fan provided on the diversion plate, a mounting block provided on the inner wall of the heat - uniforming cavity, a ventilation door provided on the mounting block, an arc - shaped slider provided on the mounting block, a pull plate provided on the ventilation door, a telescopic rod provided on the inner wall of the heat - uniforming cavity, and a ventilation hole provided on the side wall of the substrate.

6. The large-size touch screen resistant to low temperature according to claim 5, wherein: When the second temperature sensor detects that the temperature is higher than a third set temperature, the telescopic rod drives the ventilation door to rotate along the arc - shaped slider, making the arc - shaped slider inclined, and the fan is turned on to extract air from one ventilation hole, pass it through the heat - dissipating fins, and discharge it from the other ventilation hole. When the second temperature sensor detects that the temperature is lower than the second set temperature, the fan stops and the telescopic rod drives the ventilation door to return to its original position, separating the heat - dissipating fins from the ventilation holes.

7. The large-size touch screen resistant to low temperature according to claim 3, characterized in that: A heat - insulating pad is laid on the inner wall of the heat - uniforming cavity.

8. The large-size touch screen resistant to low temperature according to claim 3, wherein: The substrate is provided with a sealing plate for sealing the heat - uniforming cavity.

9. A processing method for a low-temperature resistant large-size touch screen according to any one of the above claims 1-8, characterized in that, Comprising: S1: Printing the touch electrode block and the heating electrode block on the substrate; S2: Printing the heat - uniforming block at the position on the substrate where the heat - conducting column is embedded; S3: Laying and pasting the heat - insulating pad in the heat - uniforming cavity; S4: Placing the heat - dissipating vertical plate on the heat - insulating pad in the heat - uniforming cavity and connecting it to the heat - conducting column, and installing the heat - dissipating fins between the heat - conducting main boards; S5: Installing the diversion plate, the fan, and the ventilation door in sequence, and connecting the telescopic rod to the ventilation door; S6: Filling the gaps in the heat - uniforming cavity with the heat - insulating pad, and installing the sealing plate on the substrate.

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