Touch pressure sensing coated cover plate and display device

Abstract

The utility model relates to the technical field of display screen discloses a kind of touch pressure sensing's coated cover plate and display device.It includes:glass cover plate, transparent, including visual area and non-visible area, the visual area corresponds display module and is used for the area of the display content, the non-visible area is set to the outer ring of visual area;Polyvinylidene fluoride layer, set to the lower surface of glass cover plate, and located at visual area, for obtaining touch pressure sensing, generating charge;Fluorine tin oxide layer, set to the lower surface of polyvinylidene fluoride layer, the fluorine tin oxide layer is connected with display screen, for obtaining charge formation pressure signal, and pass to display screen.In coated cover plate can form charge variation, to judge touch position, again pass to display screen, since finger directly touches coated cover plate, touch point identification on coated cover plate is more accurate, so improve the accuracy of touch identification.

Description

Technical Field

[0001] This utility model relates to the technical field of display screens, and in particular to a touch pressure sensing coated cover plate and display device. Background Technology

[0002] With the popularization of electronic products and the continuous advancement of technology, the performance requirements for display cover plates are increasing. Although traditional glass cover plates can meet basic needs, existing touch screens rely on touch pressure to act on the display screen through the glass cover during the touch process, generating electrical signals on the display screen to identify the touch state and touch position. However, due to the obstruction of the glass cover, there may be inaccuracies in touch position recognition. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides a touch pressure sensing coated cover plate and display device.

[0004] On one hand, the touch pressure sensing coated cover plate provided by this utility model adopts the following technical solution: a glass cover plate, which is transparent and includes a visible area and a non-visible area. The visible area corresponds to the area of ​​the display module used to display content, and the non-visible area is disposed on the outer ring of the visible area; a polyvinylidene fluoride layer is disposed on the lower surface of the glass cover plate and located in the visible area, which is used to acquire touch pressure sensing and generate charge; a fluorine tin oxide layer is disposed on the lower surface of the polyvinylidene fluoride layer, which is in contact with the display screen and is used to acquire charge to form a pressure signal and transmit it to the display screen.

[0005] Optionally, it further includes: a thermochromic ink layer disposed on the lower surface of the glass cover and located in the non-visible area, wherein the sum of the area of ​​the thermochromic ink layer and the area of ​​the polyvinylidene fluoride layer is equal to the area of ​​the glass cover; and the thickness of the thermochromic ink layer is 8 micrometers to 10 micrometers.

[0006] Optionally, it also includes: an aluminum silicate layer disposed on the lower surface of the thermochromic ink layer, which has wear resistance; the thickness of the aluminum silicate layer is 1 micrometer to 2 micrometers.

[0007] Optionally, it also includes: a chromium-nickel alloy layer disposed on the lower surface of the aluminum silicate layer, which has oxidation resistance; the thickness of the chromium-nickel alloy layer is 50 nanometers to 100 nanometers.

[0008] Optionally, the sum of the thickness of the thermochromic ink layer, the thickness of the aluminum silicate layer, and the thickness of the chromium-nickel alloy layer is the first thickness; the sum of the thickness of the polyvinylidene fluoride layer and the thickness of the fluorine-tin oxide layer is the second thickness; the first thickness is equal to the second thickness.

[0009] Optionally, it also includes: a vanadium nitride layer disposed on the upper surface of the glass cover plate, the area of ​​the vanadium nitride layer being the same as the area of ​​the glass cover plate, the vanadium nitride layer having wear resistance; the thickness of the vanadium nitride layer being 50 nanometers to 100 nanometers.

[0010] Optionally, it also includes: a niobium oxide layer disposed on the upper surface of the vanadium nitride layer, having wear resistance and thermal stability; the thickness of the niobium oxide layer is 50 nanometers to 100 nanometers.

[0011] Optionally, it also includes: a copper-chromium-zirconium alloy layer disposed on the upper surface of the niobium oxide layer, which has electrical conductivity and electromagnetic shielding properties; the thickness of the copper-chromium-zirconium alloy layer is 100 nanometers to 200 nanometers.

[0012] Optionally, the sum of the thicknesses of the vanadium nitride layer, the niobium oxide layer, and the copper-chromium-zirconium alloy layer is less than 400 nanometers.

[0013] On the other hand, the present invention provides a display device including the aforementioned touch pressure sensing coated cover plate.

[0014] Any of the above-described technical solutions of this utility model has at least some of the following beneficial effects: 1. Charge changes can be generated on the coating cover plate to determine the touch position and then transmit it to the display screen. Since the finger touches the coating cover plate directly, the touch point recognition on the coating cover plate is more accurate, thus improving the accuracy of touch recognition. 2. In order to ensure complete coverage and avoid the phenomenon that the circuit can still be seen after it is covered, the thickness of the thermochromic ink layer is set to a minimum of 8 micrometers to effectively ensure the coverage of the circuit. 3. The copper-chromium-zirconium alloy layer has excellent mechanical properties and corrosion resistance, which can further enhance the strength and durability of the glass cover. The alloy also provides good electrical and thermal conductivity, which helps with heat dissipation and electromagnetic shielding. 4. Make the first thickness and the second thickness equal to ensure that while the fluorine oxide layer can transmit signals to the display screen, the display screen is sealed around its perimeter to prevent dust from entering. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of a coated cover plate for touch pressure sensing according to this utility model. Figure 2 This is a diagram showing the glass cover area of ​​a touch pressure sensing coated cover according to this utility model.

[0016] Explanation of reference numerals in the attached diagram: 1. Glass cover plate; 2. Polyvinylidene fluoride layer; 3. Fluorine tin oxide layer; 4. Thermochromic ink layer; 5. Aluminum silicate layer; 6. Chromium-nickel alloy layer; 7. Vanadium nitride layer; 8. Niobium oxide layer; 9. Copper-chromium-zirconium alloy layer; 10. Visible area; 11. Non-visible area. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1 This utility model discloses a coated cover plate with touch pressure sensing. (See reference...) Figure 1 and Figure 2 The device includes: a transparent glass cover 1, comprising a visible area 10 and a non-visible area 11, wherein the visible area 10 corresponds to the area of ​​the display module used to display content, and the non-visible area 11 is disposed around the outer edge of the visible area 10; a polyvinylidene fluoride layer 2, disposed on the lower surface of the glass cover 1 and located in the visible area 10, for obtaining touch pressure sensing and generating charge; and a fluorine tin oxide layer 3, disposed on the lower surface of the polyvinylidene fluoride layer 2, which is in contact with the display screen and is used to obtain charge to form a pressure signal and transmit it to the display screen.

[0020] Based on the above structure, the glass cover 1 covers the top of the display screen, effectively protecting the display screen from scratches. The glass cover 1 includes a visible area 10 and a non-visible area 11. The visible area 10 is the area where the display screen is projected, and the content of the display screen can be seen through the visible area 10. The non-visible area 11 is arranged around the visible area 10. The non-visible area 11 is used to cover the lines connected to the display screen, ensuring that the viewer can only see the display screen and cannot see the messy lines, making the display device look beautiful.

[0021] Optional, refer to Figure 2To ensure the aesthetic appeal of the display device, the non-visible area can be set as a regular rectangle or an irregular shape. Different shapes can create differences in appearance and make the display device more distinctive.

[0022] Optionally, the combination of polyvinylidene fluoride layer 2 (PVF) and fluorinated tin oxide layer 3 (FTO) can provide piezoelectric sensing and transparent conductivity. The PVF layer, as a piezoelectric material, can convert mechanical pressure applied to its surface into a change in electrical charge, a property that enables it to be used for touch detection. The FTO layer, as a transparent conductive material, can form electrodes to detect the charge changes generated by the PVF layer. The transparency of FTO ensures that the visual effect of the touchscreen is not affected. When a user touches the display screen, the PVF layer generates a change in electrical charge, and the FTO layer, acting as electrodes, can detect these changes, thereby determining the location and pressure of the touch.

[0023] Optionally, charge changes can be generated on the coating cover to determine the touch position and then transmit it to the display screen. Since the finger touches the coating cover directly, the touch point recognition on the coating cover is more accurate, thus improving the accuracy of touch recognition.

[0024] In this preferred embodiment, the coated cover plate further includes: a thermochromic ink layer 4, disposed on the lower surface of the glass cover plate 1 and located in the non-visible area 11, the sum of the area of ​​the thermochromic ink layer 4 and the area of ​​the polyvinylidene fluoride layer 2 is equal to the area of ​​the glass cover plate 1; the thickness of the thermochromic ink layer 4 is 8 micrometers to 10 micrometers.

[0025] Based on the above structure, referring to Figure 1 The thermochromic ink layer 4 changes color according to temperature, increasing the product's fun and interactivity. The thermochromic ink layer 4 has a certain color, which can cover the messy wiring connected to the display screen. By placing the thermochromic ink layer 4 in the non-visible area 11, it conceals the wiring under the coated cover, maintaining a neat appearance on the side facing the viewer. Simultaneously, the thermochromic ink layer 4 is applied to the glass cover 1 using a screen printing process. Screen printing is flexible and allows for the design of various patterns and colors, enhancing the product's aesthetics.

[0026] Optionally, in order to ensure complete coverage and avoid the phenomenon that the lines are still visible after being covered, the thickness of the thermochromic ink layer 4 is set to a minimum of 8 micrometers, which effectively ensures the coverage of the lines.

[0027] In this preferred embodiment, the coated cover plate further includes: an aluminum silicate layer 5, disposed on the lower surface of the thermochromic ink layer 4, which has wear resistance; the thickness of the aluminum silicate layer 5 is 1 micrometer to 2 micrometers.

[0028] Based on the above structure, referring to Figure 1Aluminum silicate is a material with high hardness and high wear resistance. Placing the aluminum silicate layer 5 on the lower surface of the thermochromic ink layer 4 can effectively prevent the thermochromic ink layer 4 from being scratched. It also has good chemical and thermal stability, which can protect the thermochromic ink layer 4 from environmental influences.

[0029] In this preferred embodiment, the coated cover plate further includes: a chromium-nickel alloy layer 6, disposed on the lower surface of the aluminum silicate layer 5, which has anti-oxidation properties; the thickness of the chromium-nickel alloy layer 6 is 50 nanometers to 100 nanometers.

[0030] Based on the above structure, referring to Figure 1 Chromium-nickel alloy has excellent corrosion resistance and oxidation resistance. Placing the chromium-nickel alloy layer 6 on the lower surface of the aluminum silicate layer 5 can further protect the glass cover plate 1 and the lower coating from corrosion. The chromium-nickel alloy layer 6 can also provide a certain mechanical support, enhancing the structural strength of the entire coating layer.

[0031] In this preferred embodiment, the sum of the thickness of the thermochromic ink layer 4, the thickness of the aluminum silicate layer 5, and the thickness of the chromium-nickel alloy layer 6 is the first thickness; the sum of the thickness of the polyvinylidene fluoride layer 2 and the thickness of the fluorine tin oxide layer 3 is the second thickness; the first thickness is equal to the second thickness.

[0032] Based on the above structure, referring to Figure 1 The polyvinylidene fluoride layer 2 and the fluorine oxide layer 3 are placed on the lower surface of the glass cover plate 1 and located in the visible area 10. The thermochromic ink layer 4, the aluminum silicate layer 5, and the chromium-nickel alloy layer 6 are also placed on the lower surface of the glass cover plate 1, but located in the non-visible area 11. When the first thickness in the non-visible area 11 is large, the fluorine oxide layer 3 cannot contact the display screen and cannot transmit the detected touch points and touch signals to the display screen. When the second thickness in the visible area 10 is large, a raised gap appears between the display screen and the coated cover plate. Dust may enter through this raised gap, causing damage to the display screen. Therefore, the first thickness and the second thickness need to be equal to ensure that while the fluorine oxide layer 3 can transmit signals to the display screen, the display screen is sealed around its perimeter and dust will not enter.

[0033] In this preferred embodiment, the coated cover plate further includes: a vanadium nitride layer 7, disposed on the upper surface of the glass cover plate 1, the area of ​​the vanadium nitride layer 7 being the same as the area of ​​the glass cover plate 1, the vanadium nitride layer 7 having wear resistance; the thickness of the vanadium nitride layer 7 being 50 nanometers to 100 nanometers.

[0034] In this preferred embodiment, the coated cover plate further includes: a niobium oxide layer 8, disposed on the upper surface of the vanadium nitride layer 7, which has wear resistance and thermal stability; the thickness of the niobium oxide layer 8 is 50 nanometers to 100 nanometers.

[0035] Based on the above structure, referring to Figure 1Vanadium nitride and niobium nitride are both high-hardness, high-wear-resistant materials that effectively protect the surface of the glass cover plate 1 from scratches and abrasions. These materials also possess good chemical and thermal stability, maintaining stable performance under various environments. The vanadium nitride layer 7 and the niobium nitride layer coating also impart certain anti-reflective properties to the surface of the glass cover plate 1, enhancing its visual appeal.

[0036] In this preferred embodiment, the coated cover plate further includes: a copper-chromium-zirconium alloy layer 9, disposed on the upper surface of the niobium oxide layer 8, which has conductivity and electromagnetic shielding properties; the thickness of the copper-chromium-zirconium alloy layer 9 is 100 nanometers to 200 nanometers.

[0037] Based on the above structure, referring to Figure 1 The copper-chromium-zirconium alloy layer 9 possesses excellent mechanical properties and corrosion resistance, further enhancing the strength and durability of the glass cover plate 1. This alloy also provides good electrical and thermal conductivity, aiding in heat dissipation and electromagnetic shielding.

[0038] In this preferred embodiment, the sum of the thicknesses of the vanadium nitride layer 7, the niobium oxide layer 8, and the copper-chromium-zirconium alloy layer 9 is less than 400 nanometers.

[0039] Based on the above structure, referring to Figure 1 To reduce the overall thickness of the coated cover plate, the thickness of each layer needs to be reduced. Meanwhile, the vanadium nitride layer 7, the niobium oxide layer 8, and the copper chromium zirconium alloy layer 9 are disposed on the upper surface of the glass cover plate 1, which is the side seen by the viewer. A thicker layer structure will cause refraction or reflection of the displayed content, resulting in a poor sensory effect for the viewer. Therefore, it is necessary to ensure that the layer structure on the upper surface of the glass cover plate 1 is as thin as possible. Thus, the sum of the thicknesses of the vanadium nitride layer 7, the niobium oxide layer 8, and the copper chromium zirconium alloy layer 9 is less than 400 nanometers.

[0040] Example 2 The present invention provides a display device, including a touch pressure sensing coated cover plate.

[0041] The implementation principle of the touch pressure sensing coated cover plate and display device of this utility model embodiment is as follows: First, a vanadium nitride layer 7 and a niobium nitride layer are deposited on the front (upper surface) of the glass cover plate 1. These two high-hardness, high-wear-resistant materials effectively resist scratches and wear, while giving the glass surface anti-reflective properties and improving the visual effect. Subsequently, a copper-chromium-zirconium alloy layer 9 is deposited on top of the niobium nitride layer. Utilizing its excellent mechanical properties and corrosion resistance, it further enhances the strength and durability of the cover plate and provides good electrical and thermal conductivity. On the back (lower surface) border area of ​​the glass cover plate 1, a thermochromic ink layer 4 is screen-printed, giving the product a unique sense of fun and interactivity. To prevent damage to the thermochromic ink layer 4, an aluminum silicate layer 5 is placed underneath. Its high hardness and high wear resistance effectively protect the thermochromic ink layer 4. Below the aluminum silicate layer 5, a chromium-nickel alloy layer 6 is deposited as a base protective layer, providing corrosion resistance and oxidation resistance, while also enhancing the structural strength of the entire coating layer. Finally, a polyvinylidene fluoride layer 2 and a fluorine oxide layer 3 are placed in the middle area of ​​the back (lower surface) of the glass cover plate 1. During the touch process, pressure is converted into an electric charge signal, thereby improving the accuracy of the touch position.

[0042] By leveraging the unique properties of different materials, the performance of coated cover plates is comprehensively improved. This multi-layer coating structure design not only significantly enhances the physical properties of the coated cover plates but also enriches the functionality and aesthetics of the products, meeting the diverse needs of modern electronic products.

[0043] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A touch pressure-sensing coated cover plate, characterized in that, include: The glass cover (1) is transparent and includes a visible area (10) and a non-visible area (11). The visible area (10) corresponds to the area of ​​the display module used to display content, and the non-visible area (11) is located on the outer ring of the visible area (10). A polyvinylidene fluoride layer (2) is disposed on the lower surface of the glass cover (1) and located in the visible area (10) for obtaining touch pressure sensing and generating charge; A fluorine oxide layer (3) is disposed on the lower surface of the polyvinylidene fluoride layer (2). The fluorine oxide layer (3) is in contact with the display screen and is used to acquire the charge to form a pressure signal and transmit it to the display screen.

2. The coated cover plate for touch pressure sensing according to claim 1, characterized in that, Also includes: A thermochromic ink layer (4) is disposed on the lower surface of the glass cover plate (1) and located in the non-visible area (11). The sum of the area of ​​the thermochromic ink layer (4) and the area of ​​the polyvinylidene fluoride layer (2) is equal to the area of ​​the glass cover plate (1). The thickness of the thermochromic ink layer (4) is 8 to 10 micrometers.

3. The touch pressure sensing coated cover plate according to claim 2, characterized in that, Also includes: An aluminum silicate layer (5) is disposed on the lower surface of the thermochromic ink layer (4) and has wear resistance; The thickness of the aluminum silicate layer (5) is 1 micrometer to 2 micrometers.

4. A coated cover plate for touch pressure sensing according to claim 3, characterized in that, Also includes: A chromium-nickel alloy layer (6) is disposed on the lower surface of the aluminum silicate layer (5) and has oxidation resistance; The thickness of the chromium-nickel alloy layer (6) is 50 nanometers to 100 nanometers.

5. A coated cover plate for touch pressure sensing according to claim 4, characterized in that, The sum of the thickness of the thermochromic ink layer (4), the thickness of the aluminum silicate layer (5), and the thickness of the chromium-nickel alloy layer (6) is the first thickness. The sum of the thickness of the polyvinylidene fluoride layer (2) and the thickness of the fluorine tin oxide layer (3) is the second thickness; The first thickness is equal to the second thickness.

6. A coated cover plate for touch pressure sensing according to claim 1, characterized in that, Also includes: A vanadium nitride layer (7) is disposed on the upper surface of the glass cover plate (1). The area of ​​the vanadium nitride layer (7) is the same as the area of ​​the glass cover plate (1). The vanadium nitride layer (7) has wear resistance. The thickness of the vanadium nitride layer (7) is 50 nanometers to 100 nanometers.

7. A coated cover plate for touch pressure sensing according to claim 6, characterized in that, Also includes: A niobium oxide layer (8) is disposed on the upper surface of the vanadium nitride layer (7) and has wear resistance and thermal stability; The thickness of the niobium oxide layer (8) is 50 nanometers to 100 nanometers.

8. A coated cover plate for touch pressure sensing according to claim 7, characterized in that, Also includes: A copper-chromium-zirconium alloy layer (9) is disposed on the upper surface of the niobium oxide layer (8) and has electrical conductivity and electromagnetic shielding properties; The thickness of the copper-chromium-zirconium alloy layer (9) is 100 nanometers to 200 nanometers.

9. A coated cover plate for touch pressure sensing according to claim 8, characterized in that, The combined thickness of the vanadium nitride layer (7), the niobium oxide layer (8), and the copper-chromium-zirconium alloy layer (9) is less than 400 nanometers.

10. A display device, characterized in that, The coating cover plate with touch pressure sensing as described in any one of claims 1-9.

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