Anti-glare virtual perception touch screen and corresponding preparation method thereof

Abstract

An anti-glare virtual perception touch screen and its corresponding preparation method. The present invention provides an anti-glare virtual perception touch screen, which places an anti-glare film on the relative outer surface of the ITO film layer, that is, it takes into account the characteristics of the anti-glare film structure and has the dipole effect of the virtual perception touch screen. It produces a physical touch screen through virtual technology, which is suitable for the needs of the development of intelligent and virtual technologies. It includes: a transparent substrate; a first hardened layer; an ITO film component, and the pattern on the ITO film component is made according to the setting; an anti-glare film; an ITO film component is arranged on the second surface of the transparent substrate, the second surface of the ITO film component is covered with a first hardened layer, and the second surface of the first hardened layer is provided with an anti-glare film.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screens, in particular to an anti-glare virtual perception touch screen. The present invention also provides a method for preparing the anti-glare virtual perception touch screen. Background Art

[0002] With the emergence of intelligent and virtual technologies, new requirements have been put forward for the perception of traditional touch screens. Not only should the touch be sensitive and the control be precise, but also a strong sense of vision and a sensory entity perception of the virtual environment should be required. The touch screen is disturbed by glare in the ambient glare. When the ambient light is strong, glare will appear on the touch screen at a certain angle of illumination. Therefore, it is urgent to find a touch screen that can prevent glare, and the touch screen also needs to combine the needs of intelligent and virtual technologies. Summary of the invention

[0003] In view of the above problems, the present invention provides an anti-glare virtual perception touch screen, which places an anti-glare film on the relative outer surface of the ITO film layer, so as to take into account the characteristics of the anti-glare film structure and the dipole effect of the virtual perception touch screen. It generates a physical touch screen through virtual technology, which is suitable for the needs of the development of intelligent and virtual technologies.

[0004] An anti-glare virtual perception touch screen, characterized in that it comprises:

[0005] Transparent substrate;

[0006] First hardened layer;

[0007] ITO thin film component, the pattern on the ITO thin film component is made according to the setting;

[0008] Anti-glare film;

[0009] An ITO thin film component is arranged on the second surface of the transparent substrate, a first hardened layer is coated on the second surface of the ITO thin film component, and an anti-glare film is arranged on the second surface of the first hardened layer;

[0010] The first surface is specifically a relatively inwardly arranged surface of each film or component, and the second surface is specifically a relatively outwardly arranged surface of each film or component. The relatively inwardly arranged surface is specifically arranged toward the window side, and the relatively outwardly arranged surface is specifically arranged toward the human body side.

[0011] It is further characterized by:

[0012] The second surface of the anti-glare film is covered with a second hardened layer;

[0013] The transparent substrate is specifically optical flat glass, PET film or PMMA.

[0014] A method for preparing an anti-glare virtual perception touch screen, characterized in that:

[0015] a. Printing a virtual touch film on a transparent substrate to form an ITO film component and a first hardening layer on the second surface of the transparent substrate;

[0016] b. An anti-glare film is produced on the second surface of the first hardened layer by vacuum magnetron sputtering coating.

[0017] The method uses magnetron sputtering technology to roughen the surface of the substrate to form an anti-glare film. The method is simple to operate, the consistency is easy to control, it is suitable for large-scale production, and the cost is controllable.

[0018] Its further features are: c. the second surface of the anti-glare film is subjected to a surface hardening treatment.

[0019] It is further characterized by:

[0020] In step a, the specific operations are as follows:

[0021] a1. Use a transparent substrate as the base material, print a layer of ITO film on PET, and form a set pattern on the ITO film to form an ITO film component; the virtual touch film is different from the simple ITO film. Its positioning accuracy requirement only needs to be within the range of the touch point. The positioning accuracy is not as high as that of the ITO Sensor. Therefore, the printing method is used to complete the production of the ITO film at one time, which can greatly shorten the entire production process and time. The ITO film component produced by printing is sufficient to meet the experience of virtual reality. The printing method is used to produce the ITO film component, which has a short process, high efficiency, and low equipment investment. It is easy to ensure the yield of the film, and more importantly, it is easy to achieve the expected goal;

[0022] a2. Curing the ITO plasma of the ITO thin film component;

[0023] a3. Performing surface hardening treatment on the transparent substrate with the ITO thin film component cured thereon, and applying a layer of hardener on the second surface of the ITO thin film component to form a base film;

[0024] a4. The base film coated with the hardener is hardened by ultraviolet light to form a first hardened layer.

[0025] In step b, the specific operation is as follows: vacuum magnetron sputtering coating technology is used to produce an anti-glare structure film. The transparent substrate with the ITO film component and the first hardened layer is sent into a vacuum environment, and the second surface of the first hardened layer is roughened by a vacuum bombardment method under a vacuum state to generate an anti-glare film. The anti-glare film is completed in a vacuum environment at one time;

[0026] The manufacturing equipment in step b adopts a magnetron vacuum continuous coating machine;

[0027] Step c, the specific operations are as follows:

[0028] c1 performing a surface hardening treatment on the transparent substrate on which the anti-glare film is made, and coating a layer of hardener on the second surface with the anti-glare film to form a base film;

[0029] c2. Harden the base film coated with hardener by ultraviolet light.

[0030] It is further characterized by:

[0031] In step a1, the printing of the ITO film component forms a gold finger area with a transparent substrate, and finally the electrode of the external FPC is adhered to the gold finger area;

[0032] Before performing steps a2, b, and c2, reserve an electrode connection area.

[0033] After adopting the present invention, the touch electrode part (ITO film component) and the anti-glare film are on a transparent substrate, which ensures that the structure of the entire touch screen is compact; and the structure of the entire virtual touch screen is simple, the process operation steps are few, and the process technology is easy to control, which is suitable for quantitative production; the anti-glare film is placed on the relative outer surface of the ITO film layer, which takes into account the characteristics of the anti-glare film structure and has the dipole effect of the virtual perception touch screen. It generates a physical touch screen through virtual technology, which is suitable for the needs of the development of intelligent and virtual technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic cross-sectional view of an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A local enlarged structural schematic diagram;

[0036] Figure 3 Illustration of the static electricity relationship between human touch and screen Figure 1 :

[0037] Figure 4 The schematic diagram of the electrostatic relationship between human touch and screen panel;

[0038] Figure 5 Illustration of the static electricity relationship between human touch and screen Figure 2 ;

[0039] The names corresponding to the serial numbers in the figure are as follows:

[0040] Transparent substrate 1, ITO thin film component 2, first hardened layer 3, anti-glare film 4, second hardened layer 5. DETAILED DESCRIPTION

[0041] An anti-glare virtual perception touch screen, see Figure 1 and Figure 2 : It includes a transparent substrate 1, a first hardened layer 3, an ITO film component 2, and an anti-glare film 4, and the pattern on the ITO film component 2 is made according to the setting;

[0042] An ITO film component 2 is arranged on the second surface of the transparent substrate 1, a first hardened layer 3 is coated on the second surface of the ITO film component 2, and an anti-glare film 4 is arranged on the second surface of the first hardened layer 3;

[0043] The first surface is specifically a relatively inwardly arranged surface of each film or component, and the second surface is specifically a relatively outwardly arranged surface of each film or component. The relatively inwardly arranged surface is specifically arranged toward the window side, and the relatively outwardly arranged surface is specifically arranged toward the human body side.

[0044] In a specific implementation, the second surface of the anti-glare film 4 is covered with a second hardened layer 5;

[0045] The transparent substrate 1 is specifically optical flat glass, PET film or PMMA.

[0046] In a specific embodiment, the transparent substrate 1 is a PET film.

[0047] Virtual touch screen virtual touch realization

[0048] The relationship between human touch and the static electricity of the virtual touch screen is shown in Figure 3-Figure 5 . The top layer of the screen and the finger are non-conductive media. A DC voltage is applied to the ITO film layer under the screen. When the finger is pressed, a capacitive coupling plate relationship is formed between the finger area and the finger imprint area of ​​the screen below (note that it is not the entire screen). In this way, a tiny electrostatic field is formed between the keratin of the human finger skin that touches the screen and the outer layer of the ITO layer of the screen. Since the voltage applied to the screen is adjustable, and the finger is connected to the ground through the human body. The human body is equivalent to an electrolyte, so the keratin of the finger in the screen pressing area is polarized by the electric field, and the tiny electric field generates an electrostatic force F on the finger. electrostatic When the finger slides on the screen, the cuticle of the finger will generate a friction force F with the screen surface. friction , the electrostatic force acts on the finger, making the finger feel the touch of the real environment. The magnitude of the electrostatic force can be calculated by the following formula:

[0049]

[0050] The meanings of the formula parameters are as follows

[0051] Tg: Air gap ~ 1μm

[0052] ε0: Vacuum dielectric constant

[0053] εs: Dielectric constant of finger (skin stratum corneum)

[0054] εp: Dielectric constant of hardened layer

[0055] Ts: finger skin keratin thickness

[0056] Tp: Hardened layer thickness

[0057] V:=V_s human body static voltage

[0058] V is the voltage supplied to the ITO thin film layer electrode of the touch screen. The size can be set through the implanted program, so the size of the electrostatic force can be set. Different sizes of electrostatic force can generate different sizes of friction, so that the finger can feel the touch experience of different objective entities. Combined with the visual perception of different objects and shapes on the display screen, a virtual perception touch screen is formed.

[0059] The relationship between friction and electrostatic force is shown below

[0060]

[0061] F friction =-μF electrostatic

[0062] The electrical model of the static relationship between human touch and the screen of the virtual touch screen is shown in Figure 3 , from the finger to the touch screen is equivalent to three capacitors in series, so the total capacitance C T The relationship between the capacitance of each part satisfies

[0063]

[0064] The capacitor

[0065] Electrostatic force F electrostatic yes

[0066]

[0067] That is, the magnitude of the electrostatic force is equal to the voltage drop of the electrostatic voltage between the finger and the touch screen along the direction of the screen. Combined with the capacitance relationship, the following formula can be obtained.

[0068]

[0069] Since the dielectric constant of air ε0≈1, the above equation becomes

[0070]

[0071] Once the size and material of the touch screen are determined, V in the above formula is the only variable, and the friction coefficient μ of the screen surface is also determined, so the electrostatic force F can be changed by adjusting the voltage V. electrostatic The size of the sliding friction F between the finger and the screen surface also changes friction According to the principles of mechanics, the friction force F on the surface of an object friction for

[0072]

[0073] v is the sliding velocity vector, |v| is the sliding velocity modulus. μ is the friction coefficient. In this way, the friction force F can be determined by adjusting the voltage V friction The size of the friction force is the intensity of the virtual tactile sensation. In the application, the size of the friction force can be adjusted according to the operator's experience level to achieve the operator's virtual experience of touching an objective object.

[0074] A method for preparing an anti-glare virtual perception touch screen:

[0075] a. Printing a virtual touch film on a transparent substrate to form an ITO film component and a first hardening layer on the second surface of the transparent substrate;

[0076] b. An anti-glare film is produced on the second surface of the first hardened layer by vacuum magnetron sputtering coating.

[0077] The method uses magnetron sputtering technology to roughen the surface of the substrate to form an anti-glare film. The method is simple to operate, the consistency is easy to control, it is suitable for large-scale production, and the cost is controllable.

[0078] c. Perform surface hardening treatment on the second surface of the anti-glare film.

[0079] The preparation method corresponding to the specific embodiment is as follows:

[0080] a1. Use a transparent PET film with an optical transmittance of not less than 92% as the substrate, clean and destaticize the side where the film needs to be formed, blow the surface of the substrate with an electrostatic air gun, and then place the prepared mask plate on the PET. The mask plate is a square frame with a hollow middle. The thickness of the mask plate determines the thickness of the ITO film layer. The mask plate of this embodiment is made with a thickness of 0.05mm. Use ITO slurry to coat the mask plate. The coating speed should not be too fast to prevent or eliminate bubbles generated by the gas on the bottom surface;

[0081] a2. After coating, perform curing treatment. Send to the baking oven and bake at 80℃ for 10 minutes to allow the ITO slurry diluent to fully evaporate;

[0082] a3. Make a layer of hardening protection on the solidified ITO surface to form the first hardening layer, specifically by coating a layer of HardCoatting hardener. The thickness is controlled by a mask plate and the thickness is 0.05mm;

[0083] a4 Then use ultraviolet light to cure, the target hardness is not less than 6H, sufficient hardness is to ensure the subsequent production of AG film (anti-glare film);

[0084] In step b, the specific operation is as follows: vacuum magnetron sputtering coating technology is used to make an anti-glare structure film, and a transparent substrate with an ITO film component and a first hardened layer is sent into a vacuum environment. Under a vacuum state, a vacuum bombardment method is used to roughen the second surface of the first hardened layer to generate an anti-glare film, and the anti-glare film is completed in one step under a vacuum environment; the specific operation is as follows: when the vacuum degree of the environment is higher than 5E-6 Torr, the power is turned on first, and then argon gas is provided to the anode cavity. A strong magnetic pole pair is arranged in the anode cavity, and the direction of the magnetic field and the direction of the electrode are perpendicular to each other in space. Under the action of the electric field force, the anode will emit electrons from the cathode plate to the anode plate. Since a strong magnetic field is arranged in the anode cavity, the electrons will move forward in a spiral under the action of the vertical electric field force after being ejected. In this way, the electrons will repeatedly collide with the argon atoms filled in the cavity at high speed, causing the non-polar argon atoms to be distorted into polar argon atom dipole plasma. At this time, the center of mass of the argon atom and the center of its electrode no longer coincide as in the neutral state. It becomes a polar plasma particle. Dipole plasma has a dipole moment, and it will automatically select the direction of the electrode moment under the action of the electric field force. Because there are multiple small holes on the anode plate, there is a pressure difference between the cavity and the outside of the cavity. At the same time, due to the combined action of the electric field force and the magnetic field force in the cavity, the argon atomic plasma gains energy and flies out of the cavity. In general, the substrate is constructed into a low-potential environment, that is, the substrate holder is connected to the zero potential. However, this system constructs a dual power supply environment. A negative bias electrode plate is configured on the back of the substrate. Under the action of the dipole moment, the argon atomic plasma automatically selects the positive electrode in the direction of the negative bias electrode plate. Due to the high-voltage electric field force, the plasma will obtain great kinetic energy and accelerate to bombard the substrate surface at high speed, bombarding the plasma particle-scale material on the substrate surface. The hardened layer of the substrate faces the bombarded direction. As a result, a stacking structure is generated in the bombarded area of ​​the PET substrate at the microscopic level. Because a mask plate with a slit window is constructed in front of the active substrate, and the substrate moves forward at a uniform speed under the control of the system during the bombardment. This ensures that the entire bombardment process is completed uniformly and continuously in one go. This also ensures the uniformity and integrity of the stacking structure distribution of the anti-glare roughened surface of the substrate. The bombardment depth can be determined offline by a film thickness meter, and the target is 1 / 4 of the λ wavelength. The 550nm wavelength light source is used as the benchmark. The target depth of the program is 137.5nm. Take 137nm±15nm;

[0085] The manufacturing equipment in step b adopts a magnetron vacuum continuous coating machine;

[0086] The structure of the vacuum bombardment system in step b is shown in Chinese patent ZL 201920939508.6, and the patent name is "Etching system for preparing anti-glare glass", which consists of a planar cationic etching electrode, a mask plate, a negative bias electrode protection plate, a negative bias electrode plate, two DC power supplies and an argon gas supply system. The purity of the introduced argon gas shall not be less than 99.999%. The argon gas flow rate must be adjustable by a mass flow controller MFC. The DC working voltage that the DC power supply can provide shall not be less than 400Vdc. Through experiments, 400-600Vdc is appropriate. The specific value depends on the size of the system, the length of the bombardment distance and the material of the substrate. The bombardment power can be determined according to the size of the bombardment area, but the power density must be not less than 150W / cm2. The mask plate opens a rectangular window directly in front of the bombardment electrode. The length should be slightly longer than the height of the substrate, and the width should be 0.9 times the width of the anode plate as a channel for providing bombardment.

[0087] c1. Use an electrostatic gun to clean the surface of the anti-glare film to remove particles attached to the surface, and then apply a layer of hardener on the second surface of the anti-glare film to form a base film; the thickness is controlled by a mask plate and the thickness is 0.05mm;

[0088] c2. Harden the base film coated with hardener by ultraviolet light.

[0089] In step a1, the printing of the ITO film component forms a gold finger area with a transparent substrate, and finally the electrode of the external FPC is adhered to the gold finger area;

[0090] Before performing steps a2, b, and c2, reserve an electrode connection area.

[0091] The electrostatic perception of the virtual touch screen surface is based on the retrieval of the dielectric constant of PET material εp = theoretical value 3.44-3.68 (experimental value 2.9-3.2), and εp = 3. The dielectric constant of the human body εs = muscle / fat (56.0-66.2 / 11.2-12.7), and εs = 43. According to the embodiment, Ts = 0.01mm, Tp = 0.05, Tg = 0.001mm. The applied voltage of the plate is V = 5Vdc. The contact area of ​​the finger is 0.5cm 2 Substitute into the formula. Calculate the electrostatic force F electrostatic ,

[0092]

[0093] The friction coefficient μ = 0.01, and the friction force F of the finger sliding on the screen surface is calculated friction ,

[0094] F friction =-μF electrostatic =-0.01*0.375=-3.75*10-3 N

[0095] After adopting the present invention, the touch electrode part (ITO film component) and the anti-glare film are on a transparent substrate, which ensures that the structure of the entire touch screen is compact; and the structure of the entire virtual touch screen is simple, the process operation steps are few, and the process technology is easy to control, which is suitable for quantitative production; the anti-glare film is placed on the relative outer surface of the ITO film layer, which takes into account the characteristics of the anti-glare film structure and has the dipole effect of the virtual perception touch screen. It generates a physical touch screen through virtual technology, which is suitable for the needs of the development of intelligent and virtual technologies.

[0096] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0097] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing an anti-glare virtual perception touch screen, characterized in that: It includes the following steps: a. Printing a virtual touch film on a transparent substrate to form an ITO film component and a first hardening layer on the second surface of the transparent substrate; a1. Use a transparent substrate as the base material, print a layer of ITO film on PET, and form a set pattern on the ITO film to form an ITO film component; the virtual touch film is different from the simple ITO film. Its positioning accuracy requirement only needs to be within the range of the touch point. The positioning accuracy is not as high as that of the ITO Sensor. Therefore, the printing method is used to complete the production of the ITO film at one time, which can greatly shorten the entire production process and time. The ITO film component produced by printing is sufficient to meet the experience of virtual reality. The printing method is used to produce the ITO film component, which has a short process, high efficiency, and low equipment investment. It is easy to ensure the yield of the film, and more importantly, it is easy to achieve the expected goal; a2. Curing the ITO plasma of the ITO thin film component; a3. Performing surface hardening treatment on the transparent substrate with the ITO thin film component cured thereon, and applying a layer of hardener on the second surface of the ITO thin film component to form a base film; a4. UV-hardening the base film coated with the hardener to form a first hardened layer; b. Forming an anti-glare film on the second surface of the first hardened layer by vacuum magnetron sputtering coating; adopting vacuum magnetron sputtering coating technology to form an anti-glare structure film; sending the transparent substrate with the ITO film component and the first hardened layer into a vacuum environment, and in a vacuum state, using a vacuum bombardment method to roughen the second surface of the first hardened layer to generate an anti-glare film, and the anti-glare film is completed in a vacuum environment at one time; c. Performing surface hardening treatment on the second surface of the anti-glare film; c1 performing a surface hardening treatment on the transparent substrate on which the anti-glare film is made, and coating a layer of hardener on the second surface with the anti-glare film to form a base film; c2. The base film coated with the hardener is hardened by ultraviolet light to form a second hardened layer.

2. The method for preparing an anti-glare virtual perception touch screen according to claim 1, characterized in that: The manufacturing equipment of step b adopts a magnetron vacuum continuous coating machine.

3. The method for preparing an anti-glare virtual perception touch screen according to claim 1, characterized in that: In step a1, the printing of the ITO film component forms a gold finger area with a transparent substrate, and finally the electrode of the external FPC is adhered to the gold finger area.

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