Anti-fog capacitive touch screen

Abstract

An anti-fog capacitive touch screen comprises a display assembly, a low-resistance ITO film, a glass functional piece and a glass cover plate which are sequentially arranged from bottom to top. Wherein the display assembly is attached to the low-resistance ITO film frame, the face, away from the display assembly, of the low-resistance ITO film is covered with the glass functional piece, the other face of the glass functional piece is covered with the glass substrate, and the low-resistance ITO film can be connected with a power source. An air layer is inevitably reserved between the ITO film of the frame paste and the display assembly, fog enters the air layer to influence the display effect of the capacitive screen, the surface of the low-resistance ITO film is heated by switching on a power supply, and the fog of the air layer is volatilized, so that the technical effect of defogging can be achieved, and the touch screen is prevented from being damaged when the humidity of the touch screen is relatively high or the temperature difference is rapidly changed. And a condensation phenomenon occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to an anti-fog capacitive touch screen. Background Art

[0002] The touch screen is an input device that significantly improves the human-computer operation interface and has been widely used in many electronic products. The application scope of the touch screen is still expanding day by day, and more requirements are put forward for the performance of the touch screen. At present, the existing technology for the bonding process of the touch screen and the display screen is mainly frame bonding. This method has low cost, but most of them simply bond the two with double-sided tape, resulting in the entry of fog between the display screen and the touch screen, and easy reflection, resulting in poor display effect of the screen under light.

[0003] Since outdoor products will inevitably be irradiated by sunlight, it is easy for fog to enter between the touch screen and the display screen. When incident light occurs, scattering will make the product screen blurred, and the user experience is relatively low. Moreover, when the temperature difference in the use environment is large, fog will also condense into water droplets inside the screen, which will not only cause the display screen to be blurred, but also affect the operation of the internal components of the touch screen, and even cause a short circuit. Summary of the Utility Model

[0004] Aiming at the deficiencies in the background art, the purpose of the utility model is to provide an anti-fog capacitive touch screen.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An anti-fog capacitive touch screen includes a display component, an ITO film, and a functional sheet arranged in sequence from bottom to top; wherein, one side of the ITO film is covered with the functional sheet, and the other side is covered with the display component. The edge position of the ITO film is bonded to the display component, so that an air layer is formed in the middle position between the ITO film and the display component; and the ITO film can be connected to a power source.

[0007] Further, a glass cover plate is adhered to the side of the functional sheet away from the ITO film.

[0008] Further, the ITO film is a low-resistance ITO film, and the ITO film is provided with connection terminals, and the connection terminals are electrically connected to an external power source.

[0009] Further, the edge position of the ITO film is bonded to the display component through a double-sided tape foam.

[0010] Further, the glass cover plate and the functional sheet are bonded through an optical adhesive.

[0011] Further, the functional sheet is adhered to the ITO film through optical glue.

[0012] Further, the functional sheet is a touch functional sheet.

[0013] Further, a touch screen flexible cable is connected to the functional sheet, and a connection port is provided at one end of the touch screen flexible cable away from the functional sheet.

[0014] Further, an integrated touch control chip and peripheral components are provided on the touch screen flexible cable.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. An anti-fog capacitive touch screen proposed by the present utility model includes a display component, a low-resistance ITO film, and a functional sheet; the display component is frame-attached to the low-resistance ITO film, with an air layer left in the middle; the other side of the low-resistance ITO film away from the display component is adhered to the functional sheet through optical glue, and connection terminals are provided on the ITO film and can be connected to a power source. When the capacitive touch screen encounters a sudden change in ambient temperature, or when there is fog between the capacitive touch screen and the display component under sunlight irradiation that affects the use of the product, by energizing the low-resistance ITO film, the ITO film is quickly heated, making the heating of the entire air layer uniform, so that the fog can be volatilized within a short time, preventing the fog from condensing on the surface of the glass functional sheet and making it difficult to produce scattering, and maintaining visual clarity and transparency.

[0017] 2. An anti-fog capacitive touch screen proposed by the present utility model has a glass cover plate adhered to the glass functional sheet to protect the glass functional sheet from being knocked and broken. The glass cover plate is made of tempered glass and has good thermal stability and impact resistance. It can protect the capacitive touch screen from being damaged under external impact, making the capacitive touch screen have a strong anti-drop function during use and improving its service life.

[0018] 3. An anti-fog capacitive touch screen proposed by the present utility model, the low-resistance ITO film is frame-attached to the display component through a double-sided adhesive foam, which can facilitate the alignment of the low-resistance ITO film and the display component during installation, making the fitting more accurate, and the excellent sealing performance of the foam can prevent dust from entering and product light leakage during use. The thickness of the double-sided adhesive flatness is relatively thin, and the generated air layer is relatively thin, which can reduce reflection.

[0019] 4. An anti-fog capacitive touch screen proposed by the present utility model, the glass cover plate and the glass functional sheet are adhered through OCA or SCA optical glue, with good sealing and avoiding the corrosion of water vapor; and this type of optical glue has good light transmittance, and has advantages such as good water resistance, high temperature resistance, and good ultraviolet resistance, which can improve the light transmittance and ensure the display and sealing effects of the capacitive touch screen.

[0020] 5. A fog-proof capacitive touch screen proposed by the present utility model. The low-resistance ITO film has good electrical conductivity and transparency. The low-resistance ITO film can achieve a light transmittance of 88% within the visible light range, ensuring high brightness and clarity of the display device, and can cut off harmful electronic radiation to the human body.

[0021] 6. A fog-proof capacitive touch screen proposed by the present utility model. The glass functional sheet is adhered to the low-resistance ITO film through optical glue. The good filling performance of the optical glue makes the bonding between the glass functional sheet and the low-resistance ITO film bubble-free and the edge does not overflow glue.

[0022] 7. A fog-proof capacitive touch screen proposed by the present utility model. A touch screen cable is provided on the glass functional sheet. One end of the cable is provided with an interface, enabling it to be connected to different peripheral components, with strong versatility; an integrated touch control chip is provided on the touch screen cable to achieve precise control of the touch screen, enabling the capacitive touch screen to be used in a variety of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a fog-proof capacitive touch screen according to an embodiment of the present utility model;

[0025] Figure 2 For Figure 1 The partial enlarged view of part A;

[0026] Figure 3 For Figure 1 The partial enlarged view of part B;

[0027] In the figure, 10. Glass cover plate; 20. SCA optical glue; 30. Glass functional sheet; 40. OCA optical glue; 50. Double-sided adhesive foam; 60. ITO film; 70. Air layer; 80. Display component; 90. Touch screen cable; 901. Cable interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will Figures 1-3 describe the present utility model in detail.

[0029] A fog-proof capacitive touch screen includes a display component 80, an ITO film 60 and a functional sheet which are sequentially pasted from bottom to top; specifically, the surface of the display component 80 is framed with the ITO film 60, and the ITO film 60 is pasted with the functional sheet on the other side away from the display component 80, and a connection terminal is provided on the ITO film 60, which can be connected to a power source. The frame pasting will inevitably leave an air layer 70 between the functional sheet and the display component 80. When the temperature of the environment in which the capacitive touch screen is used suddenly changes, or the sun's rays irradiate, fog will appear in the air layer 70. At this time, the ITO film 60 is connected to a 12V power supply, and the electrical energy is converted into heat energy through the ITO film 60. The entire layer of the ITO film 60 is quickly heated, so that the gas in the air layer 70 is heated evenly, thereby volatilizing the fog in a short time, preventing the fog from condensing and affecting the use of the capacitive touch screen, and achieving the effect of maintaining the clarity and transparency of the display component 80.

[0030] In this embodiment, a cover plate is attached to the side of the functional sheet away from the ITO film 60 to protect the functional sheet and the display assembly 80 from being scratched and scratched, thereby extending the service life of the capacitive touch screen. Specifically, the cover plate is a glass cover plate 10 made of tempered glass, which has excellent drop resistance and a high safety factor. Furthermore, the thickness of the glass cover plate 10 is in the range of 0.7-3 mm, the thickness of the glass functional sheet 30 is in the range of 0.4-1.1 mm, and the thickness of the ITO film 60 is 0.15 mm; the above thickness setting can not only ensure the realization of the anti-fog capacitive touch screen function, but also make the entire capacitive touch screen have a smaller thickness, which is more convenient to use.

[0031] In this embodiment, the resistance of the ITO film 60 is below 100Ω, and it can be quickly heated when powered on. At the same time, it can reach a light transmittance of 88% within the visible light range, ensuring the clarity of the capacitive touch screen. The low-resistance ITO film 60 is framed with the display component 80 by sticking double-sided adhesive foam 50 around it; the double-sided adhesive foam 50 has good sealing performance and excellent resistance to compression deformation. It can also ensure good adhesion between the display component 80 and the low-resistance ITO film 60 even when it is hit, and will not pollute the equipment; sticking the double-sided adhesive foam 50 around the low-resistance ITO film 60 can make the low-resistance ITO film 60 and the display component 80 more accurate in installation and more tightly fitted, thereby avoiding light leakage from the product or dust entering the air layer 70 during use. Specifically, the thickness of the double-sided adhesive foam 50 ranges from 0.5 to 1 mm, which can control the volume of the air layer 70 within a smaller range, reducing the impact of the reflection of the air layer 70 on the use of the capacitive touch screen.

[0032] In this embodiment, the glass cover plate 10 and the glass functional sheet 30 can be adhered through an OCA optical adhesive 40 or an SCA optical adhesive 20 with a thickness range of 0.175 - 0.26 mm. The flatness of the adhesive layer of this type of optical adhesive is high, making the adhesion of the capacitive touch screen more accurate and uniform. Among them, the OCA optical adhesive 40 is mainly used for the adhesion of soft substrate to soft substrate, or soft substrate to hard substrate, while the SCA optical adhesive 20 can be applied to the adhesion of soft substrate to soft substrate, soft substrate to hard substrate, and also hard substrate to hard substrate. Specifically, in this embodiment, the SCA optical adhesive 20 with excellent earthquake resistance and explosion resistance is selected to bond the glass cover plate 10 and the glass functional sheet 30, which can effectively maintain the stability of the capacitive touch screen during use and is safer and more reliable. The OCA optical adhesive 40 with a thickness of 0.175 mm is selected to complete the bonding of the glass functional sheet 30 and the low-resistance ITO film 60. The OCA optical adhesive 40 is colorless and transparent with high light transmittance, which can increase the brightness of the display component 80 and provide a high transmittance, reducing energy consumption. At the same time, the OCA adhesive has high adhesion, making the bonding between the glass functional sheet 30 and the low-resistance ITO film 60 more firm.

[0033] In this embodiment, a capacitive touch screen cable 90 is provided on the glass functional sheet 30, and a cable interface 901 is provided at one end of the capacitive touch screen cable 90, which can be connected to other peripheral components. Specifically, the cable interface 901 can be a USB or IIC interface, with strong versatility. And an integrated touch control chip is provided on the capacitive touch screen cable 90 to achieve precise control of the touch screen.

[0034] In this embodiment, the described solution can be adapted to anti-fog capacitive touch screens with sizes ranging from 3.5 inches to 42 inches. Specifically, the display component 80 with the low-resistance ITO film 60 frame-mounted can be an LCD display screen. The LCD display screen has size advantages, has no radiation and no flicker during operation, has relatively low energy consumption, and has a good visual effect. Further, the low-resistance ITO film 60 can also be directly frame-mounted with the LCM liquid crystal display component 80.

[0035] The above embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An anti-fog capacitive touch screen, characterized in that: It includes a display component, an ITO film and a functional sheet arranged in sequence from bottom to top; wherein, one side of the ITO film is covered with the functional sheet, and the other side is covered with the display component, the edge position of the ITO film is bonded to the display component, so that an air layer is formed in the middle position between the ITO film and the display component; and the ITO film can be connected to a power source.

2. The anti-fog capacitive touch screen according to claim 1, characterized in that: A glass cover plate is adhered to the side of the functional sheet facing away from the ITO film.

3. The anti-fog capacitive touch screen according to claim 1, characterized in that: The ITO film is a low-resistance ITO film, and the ITO film is provided with a connection terminal, and the connection terminal is electrically connected to an external power source.

4. The anti-fog capacitive touch screen according to claim 1, characterized in that: The edge of the ITO film is bonded to the display component via double-sided adhesive foam.

5. The anti-fog capacitive touch screen according to claim 2, characterized in that: The glass cover plate and the functional sheet are bonded together by optical adhesive.

6. The anti-fog capacitive touch screen according to claim 1, characterized in that: The functional sheet is adhered to the ITO film by optical adhesive.

7. The anti-fog capacitive touch screen according to claim 1, characterized in that: The functional sheet is a touch functional sheet.

8. The anti-fog capacitive touch screen according to claim 1, characterized in that: A touch screen cable is connected to the functional sheet, and a connection port is provided at one end of the touch screen cable away from the functional sheet.

9. The anti-fog capacitive touch screen according to claim 8, characterized in that: The touch screen cable is provided with an integrated touch chip and peripheral components.

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