Touch cover plate with excellent dielectric property and piezoelectric property and touch screen

Abstract

The utility model discloses a touch control cover plate with excellent dielectric property and piezoelectric property. The touch control cover plate comprises a glass cover plate; the barium titanate coating layer is arranged at the top of the glass cover plate; the scratch-proof coating film layer is arranged at the top of the barium titanate coating film layer; wherein the hardness of the scratch-proof coating layer is greater than that of the barium titanate coating layer. The touch cover plate has excellent dielectric property and piezoelectric property. The utility model further discloses a capacitive touch screen which comprises the touch cover plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to touch cover plate technology especially relates to a kind of touch cover plate and capacitive touch screen with excellent dielectric property and piezoelectric property. BACKGROUND

[0002] With the popularity of touch device and the increasing complexity of function, the performance requirements of touch cover plate have also been significantly improved.

[0003] Although traditional glass cover plate has basic transparency and structural support, it has limitations in electrical performance. Improving the dielectric property of touch cover plate can enhance the electric field sensing capability, making the touch signal change of capacitive touch screen more significant, thereby improving touch sensitivity and reducing electromagnetic wave loss, improving 5G signal transmission efficiency, and reducing energy loss during wireless charging. Improving the piezoelectric property of touch cover plate can generate electric charge signals more efficiently under stress, enhancing the real-time and accuracy of touch feedback.

[0004] Therefore, it is a technical problem to be solved in the industry to develop a touch cover plate with excellent dielectric property and piezoelectric property. SUMMARY

[0005] To solve the above problems of the prior art, the utility model provides a touch cover plate and capacitive touch screen with excellent dielectric property and piezoelectric property.

[0006] The technical problem to be solved by the utility model is solved by the following technical solutions:

[0007] A touch cover plate with excellent dielectric property and piezoelectric property comprises:

[0008] Glass cover plate

[0009] Barium titanate plating layer, disposed on the top of the glass cover plate

[0010] Scratch-resistant plating layer, disposed on the top of the barium titanate plating layer

[0011] Wherein, the hardness of the scratch-resistant plating layer is greater than the hardness of the barium titanate plating layer.

[0012] Further, the thickness of the barium titanate plating layer is 20-30 nm.

[0013] Further, the scratch-resistant plating layer is tungsten carbide plating layer, diamond-like carbon plating layer or boron carbide plating layer, and the thickness is 50-100 nm.

[0014] Further, the touch cover plate further comprises an organic resin coating layer, which is arranged between the barium titanate plating layer and the scratch-resistant plating layer.

[0015] Further, the organic resin coating layer is an epoxy resin coating layer, a phenolic resin coating layer or a polyimide resin coating layer, and has a thickness of 100-200 nm.

[0016] Further, the touch cover plate further comprises:

[0017] An appearance ink screen printing layer is arranged at the bottom of the glass cover plate.

[0018] A reflective insulating plating layer is arranged at the bottom of the appearance ink screen printing layer.

[0019] Further, the appearance ink screen printing layer is a thermochromic ink layer, and has a thickness of 8-12 μm.

[0020] Further, the reflective insulating plating layer is a europium titanate plating layer, and has a thickness of 50-100 nm.

[0021] Further, the glass cover plate has a visual area and a frame area, the frame area surrounds the visual area, the appearance ink screen printing layer and the reflective insulating plating layer only cover the frame area, and avoid the visual area, and the barium titanate plating layer and the scratch-resistant plating layer simultaneously cover the visual area and the frame area.

[0022] A capacitive touch screen comprises a capacitive touch panel and the above touch cover plate, and the capacitive touch panel is arranged at the bottom of the touch cover plate.

[0023] The utility model discloses the barium titanate plating layer is arranged at the top of the glass cover plate, and the barium titanate plating layer is typical piezoelectric film layer and has higher dielectric constant (the dielectric constant under room temperature is about 1400), can improve the dielectric property and piezoelectric property of touch cover plate, and excellent dielectric property can enhance electric field induction ability, makes capacitive touch screen touch signal change more remarkable, thereby promotes touch sensitivity, and reduces electromagnetic wave loss, promotes 5G signal transmission efficiency, reduces energy loss when wireless charging simultaneously, and excellent piezoelectric property can produce charge signal more efficiently when stressed, enhances the real -time nature and accuracy of touch feedback, in addition, the utility model discloses the scratch-resistant plating layer of higher hardness is arranged at the top of barium titanate plating layer, can protect barium titanate plating layer to avoid barium titanate plating layer being scratched by external hard object. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1The utility model provides a touch cover plate's stacking structure schematic drawing.

[0025] Figure 2 The utility model provides another touch cover plate's stacking structure schematic drawing.

[0026] Figure 3 The utility model provides another touch cover plate's stacking structure schematic drawing.

[0027] Figure 4 For Figure 3 The utility model provides a touch cover plate's plane structure schematic drawing.

[0028] Figure 5 The utility model provides a capacitive touch screen's stacking structure schematic drawing. DETAILED DESCRIPTION

[0029] The utility model will be explained in detail below in combination with the drawings and examples, the example of the example is shown in the drawings, wherein the same or similar label shows the same or similar element or element with the same or similar function throughout the same or similar. The example described below by referring to the drawings is exemplary, and is intended to explain the utility model, and can not be understood as the limitation of the utility model.

[0030] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore can not be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation of the utility model.

[0031] In addition, the terms "first", "second", "third" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0032] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix", "arrange" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the indirect connection of intermediate medium, also can be the communication of two element interiors or the interaction of two elements.The specific meaning of the above terms in the utility model can be understood according to specific circumstances for ordinary skilled person in the art.

[0033] Embodiment one

[0034] As Figure 1 Indicated, a touch cover plate with excellent dielectric properties and piezoelectric properties includes:

[0035] Glass cover plate 31;

[0036] Barium titanate plating layer 32, the barium titanate plating layer 32 is set at the top of the glass cover plate 31;

[0037] Scratch-resistant plating layer 33, the scratch-resistant plating layer 33 is set at the top of the barium titanate plating layer 32;

[0038] Wherein, the hardness of the scratch-resistant plating layer 33 is greater than the hardness of the barium titanate plating layer 32.

[0039] The utility model discloses the barium titanate plating layer 32 is set at the top of the glass cover plate 31, and the barium titanate plating layer 32 is typical piezoelectric film layer and has higher dielectric constant (the dielectric constant at room temperature is about 1400), can improve the dielectric properties and piezoelectric properties of touch cover plate, and excellent dielectric properties can enhance electric field induction ability, makes the touch signal change of capacitive touch screen more remarkable, thereby promotes touch sensitivity, and reduces electromagnetic wave loss, improves 5G signal transmission efficiency, simultaneously reduces the energy loss when wireless charging, and excellent piezoelectric properties can produce charge signal more efficiently when stressed, enhances the real-time performance and accuracy of touch feedback, in addition, the utility model discloses the scratch-resistant plating layer 33 of higher hardness is set at the top of the barium titanate plating layer 32, can protect the barium titanate plating layer 32 to avoid the barium titanate plating layer 32 being scratched by external hard object.

[0040] The barium titanate plating layer 32 can be uniformly covered on the top of the glass cover plate 31 by using magnetron sputtering method, pulse laser deposition method or sol-gel method, and the thickness is 20-30nm.

[0041] The scratch-resistant coating layer 33 can be, but is not limited to, a tungsten carbide coating layer (Mohs hardness 8.5-9.5), a diamond-like coating layer (Mohs hardness 7-9), or a boron carbide coating layer (Mohs hardness 9.3), etc., and has a thickness of 50-100 nm. The tungsten carbide coating layer can be formed by uniformly covering tungsten carbide target material on the top of the barium titanate coating layer 32 using ultrasonic flame spraying, plasma spraying, or magnetron sputtering, etc. The diamond-like coating layer can be formed by uniformly covering graphite target material on the top of the barium titanate coating layer 32 using magnetron sputtering, plasma-enhanced chemical vapor deposition, or dual ion beam sputtering, etc. The boron carbide coating layer can be formed by uniformly covering boron carbide target material on the top of the barium titanate coating layer 32 using magnetron sputtering, electron beam evaporation, or chemical vapor deposition, etc.

[0042] Preferably, as shown in FIG. 1, the touch cover plate further comprises an organic resin coating layer 34, which is arranged between the barium titanate coating layer 32 and the scratch-resistant coating layer 33. Figure 2

[0043] The organic resin coating layer 34 has good flexibility and adhesion, and can enhance the adhesion and impact resistance between the barium titanate coating layer 32 and the scratch-resistant coating layer 33.

[0044] The organic resin coating layer 34 can be an epoxy resin coating layer, a phenolic resin coating layer, or a polyimide resin coating layer, and has a thickness of 100-200 nm.

[0045] Preferably, as shown in FIG. 1, the touch cover plate further comprises: Figure 3

[0046] An appearance ink screen printing layer 35, which is arranged at the bottom of the glass cover plate 31;

[0047] A reflective insulating coating layer 36, which is arranged at the bottom of the appearance ink screen printing layer 35.

[0048] The appearance ink screen printing layer 35 is used to provide appearance color, texture, or pattern, etc. for the touch cover plate, and is a functional layer forming the appearance body of the touch cover plate. The reflective insulating coating layer 36 is used to improve the reflectivity of the appearance ink screen printing layer 35, so as to reflect the light of the display panel back into the display panel, improve the light utilization rate of the display panel, and electrically isolate the touch cover plate from the display panel and the touch panel by using the insulating property, so as to prevent static electricity generated when the display panel and the touch panel are powered on from being transmitted to the touch cover plate.

[0049] ​​The appearance ink screen printing layer 35 may be, but is not limited to, a thermochromic ink layer, with a thickness of 8-12 μm.

[0050] The appearance ink screen printing layer 35 uses thermochromic ink, which allows the appearance color of the touch cover to change with the ambient temperature, thereby improving the personalization of the appearance of the touch cover.

[0051] The reflective insulating coating layer 36 may be, but is not limited to, a europium titanate coating layer with a thickness of 50-100 nm.

[0052] The europium titanate coating layer can be formed by uniformly covering the top of the barium titanate coating layer 32 with europium titanate target material using methods such as sol-gel method, magnetron sputtering method or chemical vapor deposition method.

[0053] Among them, such as Figure 4 As shown, the glass cover 31 has a visible area 311 and a frame area 312. The frame area 312 surrounds the visible area 311. The visible area 311 corresponds to the touch area of ​​the touch panel and the display area of ​​the display panel. The frame area 312 corresponds to the peripheral area of ​​the touch panel and the display panel. The appearance ink silkscreen layer 35 and the reflective insulating coating layer 36 only cover the frame area 312 and avoid the visible area 311. The barium titanate coating layer 32 and the scratch-resistant coating layer 33 cover both the visible area 311 and the frame area 312.

[0054] Example 2

[0055] like Figure 5 As shown, a capacitive touch screen includes a capacitive touch panel 1 and a touch cover plate 3 as described in Embodiment 1, wherein the capacitive touch panel 1 is disposed at the bottom of the touch cover plate 3.

[0056] In this embodiment, the capacitive touch panel 1 is bonded and fixed to the bottom of the touch cover plate 3 by an OCA optical adhesive layer 2.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present utility model, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the present utility model.

Claims

1. A touch cover plate with excellent dielectric and piezoelectric properties, characterized in that, include: Glass cover; A barium titanate coating layer is disposed on the top of the glass cover plate; A scratch-resistant coating layer is disposed on top of the barium titanate coating layer; The hardness of the scratch-resistant coating layer is greater than that of the barium titanate coating layer.

2. The touch cover plate according to claim 1, characterized in that, The thickness of the barium titanate coating is 20-30 nm.

3. The touch cover plate according to claim 1, characterized in that, The scratch-resistant coating is a tungsten carbide coating, a diamond-like carbon coating, or a boron carbide coating, with a thickness of 50-100 nm.

4. The touch cover plate according to claim 1, characterized in that, The touch cover also includes an organic resin coating, which is disposed between the barium titanate coating layer and the scratch-resistant coating layer.

5. The touch cover plate according to claim 4, characterized in that, The organic resin coating is an epoxy resin coating, a phenolic resin coating, or a polyimide resin coating, with a thickness of 100-200 nm.

6. The touch cover plate according to claim 1, characterized in that, The touch cover also includes: An exterior ink screen printing layer is disposed at the bottom of the glass cover plate; A reflective insulating coating layer is disposed at the bottom of the appearance ink screen printing layer.

7. The touch cover plate according to claim 6, characterized in that, The appearance ink screen printing layer is a thermochromic ink layer with a thickness of 8-12μm.

8. The touch cover plate according to claim 6, characterized in that, The reflective insulating coating layer is a europium titanate coating layer with a thickness of 50-100 nm.

9. The touch cover plate according to claim 6, characterized in that, The glass cover has a visible area and a border area, with the border area surrounding the visible area; the appearance ink screen printing layer and the reflective insulating coating layer only cover the border area and avoid the visible area; the barium titanate coating layer and the scratch-resistant coating layer cover both the visible area and the border area.

10. A capacitive touch screen, characterized in that, It includes a capacitive touch panel and the touch cover plate as described in claim 1, wherein the capacitive touch panel is disposed at the bottom of the touch cover plate.

Images