A concealed touch film

Abstract

The utility model belongs to the technical field of hidden touch film, specifically relates to a hidden touch film, which comprises: first base material layer, at least one pattern layer, hidden layer and touch layer which are sequentially and laminatedly arranged from bottom to top, wherein the hidden layer is provided with a convex structure, and the recessed part formed between the convex structures is filled with light-shielding first ink; the hidden touch film is hidden by setting the hidden layer, and the recessed part filled with light-shielding ink is matched with the convex structure to realize hidden display; through the pattern layer, 3D embossing, dynamic light and shadow, wood grain and other effects can be realized; meanwhile, through the setting of the touch layer, the function of touch is realized, so that multiple functions are simultaneously integrated on one film.

Description

Technical Field

[0001] This utility model belongs to the field of hidden touch film technology, specifically relating to a hidden touch film. Background Technology

[0002] Existing technologies utilize hidden films with decorative textures to effectively integrate in-vehicle systems such as the trip computer, air conditioning, infotainment, door and window switches, and ambient lighting into a single display panel. This central control display panel, through the application of an image printing layer, creates a translucent textured image. When there is no backlight, the textured image is displayed, giving it an overall appearance similar to ordinary decorative parts, yet concealing the combined control and display components. It possesses both decorative and translucent qualities. When backlighting is required for operation and display, the panel's textured pattern is softened, revealing the hidden graphic.

[0003] The images displayed without backlight and the patterns hidden are both formed using CMYK four-color screen printing. Due to the limitations of screen printing precision, the pixel size is greater than 80um and there are burrs on the edges, which cannot meet the increasingly demanding visual requirements.

[0004] Therefore, overcoming the shortcomings of insufficient precision in existing screen printing of hidden films is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one hidden touch film.

[0007] In a first aspect, embodiments of this disclosure provide a hidden touch film, comprising: a first substrate layer, at least one pattern layer, a hidden layer, and a touch layer stacked sequentially from bottom to top; wherein the hidden layer is provided with raised structures, and the recesses formed between the raised structures are filled with a light-shielding first ink.

[0008] In one alternative embodiment, the pattern layer includes a printed pattern, and the thickness of the pattern layer is 0.5 μm to 2 μm.

[0009] In one optional embodiment, the patterned layer includes a plurality of micro-nano structures, the period of which ranges from 1 μm to 200 μm, and the cross-section of which includes any one or a combination of at least two of the following: ramp shape, rectangle, and arc shape.

[0010] In one optional embodiment, the gaps between the adjacent micro / nano structures are further filled with a light-transmitting second ink, which is a semi-transparent ink.

[0011] In one optional embodiment, a coating layer is further disposed between the micro / nano structure and the second ink; the coating layer is a dielectric layer or a non-conductive transparent metal layer with a thickness of 80 nm to 260 nm.

[0012] In one optional embodiment, the protrusion in the hidden layer is transparent, the protrusion is a cylinder or a polygonal prism, the height of the protrusion is 5μm to 80μm, and the height of the first ink is 90% to 100% of the height of the protrusion.

[0013] In one optional embodiment, the touch layer includes a first base layer, a first conductive layer, a second base layer, and a second conductive layer stacked sequentially; wherein the first conductive layer is attached to or embedded in the side of the first base layer away from the hidden layer, and the second conductive layer is attached to or embedded in the side of the second base layer away from the hidden layer.

[0014] In one optional embodiment, the thickness of the first conductive layer and the second conductive layer is 6μm to 20μm, and the material is a conductive material; the material of the first substrate layer and the second substrate layer is a UV adhesive.

[0015] In one optional embodiment, a hardened coating is provided on the side of the first substrate layer away from the pattern layer; an anti-glare layer is also provided on the side of the hardened coating away from the first substrate layer, and the anti-glare layer has pits.

[0016] In one alternative embodiment, a second substrate layer is further included, the touch layer being disposed on one side of the second substrate layer; the hidden layer is bonded to the other side of the second substrate layer via an adhesive layer.

[0017] The beneficial effects of this utility model are:

[0018] 1. In this utility model, by adding a touch layer, the hidden function and the touch function are integrated on a single film.

[0019] 2. The pattern layer of this utility model is formed by UV embossing to imprint micro-nano structures, which has higher precision than the traditional screen printing method. At the same time, it can achieve a variety of graphic effects, such as 3D relief effect or dynamic light and shadow effect, so that the effect seen from different viewing angles is different.

[0020] 3. The pattern layer in this invention can be multi-layered, for example, each layer can be imprinted with different micro-nano structures, or one pattern layer can be a printed graphic and another pattern layer can be an imprinted micro-nano structure, which can achieve the superposition of multiple different display effects.

[0021] 4. In this utility model, a coating layer is used. The coating layer is a dielectric layer or a non-conductive transparent metal layer, which plays a role in brightening and increasing transparency. At the same time, the dielectric layer is non-conductive, and the non-conductive transparent metal layer is also made of non-conductive metal, so it does not affect the touch performance of the touch film.

[0022] 5. In this utility model, a hardened coating is provided on the side of the first substrate layer away from the pattern layer, which protects the stability of the underlying structure and improves the scratch resistance, abrasion resistance and chemical resistance of the outer surface.

[0023] 6. This utility model sets an anti-glare layer on the hardened coating. Since the hardened layer is usually a high-gloss mirror coating, anti-glare layers with different haze values ​​can be used on the hardened coating, and pits are formed on its surface to achieve the effect of anti-glare.

[0024] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the hidden touch film in Example 1;

[0028] Figure 2 This is a schematic diagram of the structure of the hidden touch film provided in Example 2;

[0029] Figure 3 This is a schematic diagram of the structure of the hidden touch film provided in Example 3;

[0030] Figures 4a-4d This is a schematic diagram of the structure of the hidden touch film provided in Example 4;

[0031] Figure 5 This is a schematic diagram of the structure of the hidden touch film provided in Example 5;

[0032] Figure 6This is a schematic diagram of the structure of the hidden touch film provided in Example 6; Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0035] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0036] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Example 1

[0040] Please see Figure 1 ,like Figure 1 As shown, this embodiment provides a hidden touch film, including a first substrate layer 1, a pattern layer 2, a hidden layer 3 and a touch layer 4 stacked sequentially from bottom to top; wherein, the pattern layer 2 is a printed pattern, which is printed on the first substrate layer 1 by offset printing; the hidden layer 3 is provided with a raised structure 31, and the recesses formed between the raised structures are filled with a light-shielding first ink 32.

[0041] Specifically, the first substrate layer 1 includes a transparent film composed of any one or more of PET, PMMA, PC, and ABS.

[0042] Specifically, pattern layer 2 can be a wood grain pattern, but is not limited thereto. The thickness of pattern layer 2 is 0.5μm to 2μm, for example, 0.5μm, 1μm, 1.5μm, or 2μm.

[0043] Specifically, the touch layer 4 includes a first base layer 41, a first conductive layer 42, a second base layer 43, and a second conductive layer 44, which are sequentially stacked. The first conductive layer 42 is attached to or embedded in the side of the first base layer 41 away from the hidden layer 3, and the second conductive layer 44 is attached to or embedded in the side of the second base layer 43 away from the hidden layer 3. The thickness of the first conductive layer 42 and the second conductive layer 44 is 6–20 μm, and they are made of conductive materials. The material of the first base layer 41 and the second base layer 43 is UV adhesive. Specifically, the conductive material includes any one of silver, copper, a conductive polymer, or a composite conductive material. The thickness of the first conductive layer is 6 μm–20 μm, exemplarily 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, and 20 μm. The thickness of the second conductive layer is 6μm to 20μm, with examples being 6μm, 8μm, 10μm, 12μm, 14μm, 16μm, 18μm, and 20μm.

[0044] Specifically, the raised structure 31 in the hidden layer 3 is transparent. The raised structure 31 is a cylinder or a polygonal prism. The height of the raised structure 31 is 5μm to 80μm. For example, the height of the raised structure 31 is 5μm, 10μm, 15μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, or 80μm. The height of the first ink is 90% to 100% of the height of the raised structure. For example, it is 90%, 92%, 94%, 96%, 98%, or 100%.

[0045] Example 2

[0046] Please see Figure 2 ,like Figure 2 As shown, the difference between this embodiment and Example 1 lies in the pattern layer. In this embodiment, the pattern layer 2 includes a plurality of micro-nano structures 21, and the period of the micro-nano structures 21 ranges from 1μm to 200μm. For example, the period of the micro-nano structures 21 is 1μm, 5μm, 10μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, and 200μm. The cross-section of the micro-nano structures includes any one or a combination of at least two of the following: ramp shape, rectangle, and arc shape, to produce light and shadow, relief, or dynamic effects.

[0047] Specifically, the gaps between adjacent micro / nano structures 21 are also filled with a translucent second ink 22, which is a semi-translucent ink.

[0048] Example 3

[0049] Please see Figure 3 ,like Figure 3 As shown, the difference between this and Example 2 is that a coating layer 23 is also provided between the micro / nano structure and the second ink 22; the coating layer 23 is a dielectric layer or a non-conductive transparent metal layer with a thickness of 80nm to 260nm, such as 80nm, 100nm, 120nm, 140nm, 160nm, 180nm, 200nm, 220nm, 240nm, and 260nm. The coating layer 23 is obtained by vapor deposition or vacuum sputtering process and plays the role of brightening and enhancing transparency. The preferred materials are SiO2 and indium.

[0050] Example 4

[0051] Please see Figures 4a-4c ,like Figures 4a-4c As shown, the difference between this embodiment and Embodiment 2 is that the pattern layer is multi-layered, such as... Figure 4aThe diagram shows two pattern layers, 2 and 2'. Each pattern layer contains a plurality of micro / nano structures with a period ranging from 1 μm to 200 μm. The cross-sections of the micro / nano structures include any one or a combination of at least two of the following: ramp-shaped, rectangular, and arc-shaped, to produce light and shadow, relief, or dynamic effects. In this embodiment, the cross-section of the micro / nano structures in pattern layer 2 is triangular, and the gaps between adjacent micro / nano structures are filled with a translucent second ink, which is a semi-translucent ink, such as red semi-translucent ink. The cross-section of the micro / nano structures in pattern layer 2' is rectangular, and the gaps between adjacent micro / nano structures are also filled with a translucent second ink, which is a semi-translucent ink, such as yellow semi-translucent ink.

[0052] like Figure 4b As shown, a coating layer 23 is also disposed between the micro-nano structure in pattern layer 2 and the second ink; a coating layer 23' is also disposed between the micro-nano structure in pattern layer 2' and the second ink. The coating layers 23 and 23' are dielectric layers or non-conductive transparent metal layers with a thickness of 80nm to 260nm. The coating layer 24 is obtained by vapor deposition or vacuum sputtering process and plays a role in brightening and enhancing transparency. The preferred materials are SiO2 and indium.

[0053] like Figure 4c As shown, pattern layer 2 contains a plurality of micro-nano structures, the cross-section of which is triangular; pattern layer 2' is a printed pattern, formed by offset printing and other methods, with a thickness of 0.5μm to 2μm.

[0054] like Figure 4d As shown, pattern layer 2 contains a plurality of micro-nano structures, each with a triangular cross-section. A coating layer 23 is disposed between the micro-nano structures and the second ink in pattern layer 2. Coating layer 23 is a dielectric layer or a non-conductive, transparent metal layer with a thickness of 80 nm to 260 nm. Coating layer 24 is obtained using vapor deposition or vacuum sputtering processes, serving to enhance brightness and transparency; the preferred materials are SiO2 and indium. Pattern layer 2' is a printed pattern, formed by offset printing or other methods, with a thickness of 0.5 μm to 2 μm.

[0055] In other embodiments, the pattern layer may have 3, 5, or more layers, and is not limited thereto.

[0056] Example 5

[0057] Please see Figure 5 ,like Figure 5As shown, the difference from Embodiment 1 is that a hardened coating 5 is provided on the side of the first substrate layer 1 away from the pattern layer 2, which serves to protect and hide the touch film and improve its scratch resistance and chemical resistance. The hardened coating 5 is usually a high-gloss mirror coating. An anti-glare layer 6 is also provided on the side of the hardened coating 5 away from the first substrate layer 1. The anti-glare layer 6 can be formed using matte coatings with different haze values. The anti-glare layer 6 has pits to achieve the effect of preventing dizziness.

[0058] Example 6

[0059] Please see Figure 6 ,like Figure 6 As shown, the difference between this and Embodiment 1 is that the hidden touch film further includes a second substrate layer 7, a touch layer 4 is disposed on one side of the second substrate layer 7, and a hidden layer 3 is bonded to the other side of the second substrate layer 7 via an adhesive layer 8. This hidden touch film improves the yield by providing a touch layer on the second substrate layer, a pattern layer and a hidden layer sequentially on the first substrate layer, and then bonding the two together with an adhesive layer.

[0060] In summary,

[0061] 1. In this utility model, by adding a touch layer, the hidden function and the touch function are integrated on a single film.

[0062] 2. The pattern layer of this utility model is formed by UV embossing to imprint micro-nano structures, which has higher precision than the traditional screen printing method. At the same time, it can achieve a variety of graphic effects, such as 3D relief effect or dynamic light and shadow effect, so that the effect seen from different viewing angles is different.

[0063] 3. The pattern layer in this invention can be multi-layered, for example, each layer can be imprinted with different micro-nano structures, or one pattern layer can be a printed graphic and another pattern layer can be an imprinted micro-nano structure, which can achieve the superposition of multiple different display effects.

[0064] 4. In this utility model, a coating layer is used. The coating layer is a dielectric layer or a non-conductive transparent metal layer, which plays a role in brightening and increasing transparency. At the same time, the dielectric layer is non-conductive, and the non-conductive transparent metal layer is also made of non-conductive metal, so it does not affect the touch performance of the touch film.

[0065] 5. In this utility model, a hardened coating is provided on the side of the first substrate layer away from the pattern layer, which protects the stability of the underlying structure and improves the scratch resistance, abrasion resistance and chemical resistance of the outer surface.

[0066] 6. This utility model sets an anti-glare layer on the hardened coating. Since the hardened layer is usually a high-gloss mirror coating, anti-glare layers with different haze values ​​can be used on the hardened coating, and pits are formed on its surface to achieve the effect of anti-glare.

[0067] The hidden touch film provided by this utility model can be applied to display panels of automobiles and home appliances, smart home surfaces and other technical fields.

[0068] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hidden touch film, characterized in that, include: The layers are arranged sequentially from bottom to top: a first substrate layer, at least one pattern layer, a hidden layer, and a touch layer; wherein... The hidden layer has raised structures, and the recesses formed between the raised structures are filled with a light-shielding first ink, the height of which is 90%-100% of the height of the raised structures; the first substrate layer has a hardened coating on the side away from the pattern layer.

2. The hidden touch film as described in claim 1, characterized in that, The pattern layer includes a printed graphic, and the thickness of the pattern layer is 0.5μm to 2μm.

3. The hidden touch film as described in claim 1, characterized in that, The patterned layer comprises a plurality of micro-nano structures, the period of which ranges from 1 μm to 200 μm, and the cross-section of which comprises any one or a combination of at least two of the following: ramp shape, rectangle, and arc shape.

4. The hidden touch film as described in claim 3, characterized in that, The gaps between adjacent micro-nano structures are also filled with a light-transmitting second ink, which is a semi-transmitting ink.

5. The hidden touch film as described in claim 4, characterized in that, A coating layer is also provided between the micro / nano structure and the second ink; The coating layer is a dielectric layer or a non-conductive transparent metal layer with a thickness of 80nm to 260nm.

6. The hidden touch film as described in claim 1, characterized in that, The protruding structure in the hidden layer is transparent, and the protruding structure is a cylinder or a polygonal prism with a height of 5μm to 80μm.

7. The concealed touch film as described in claim 1, characterized in that, The touch layer includes a first base layer, a first conductive layer, a second base layer, and a second conductive layer stacked sequentially. The first conductive layer is attached to or embedded in the first base layer on the side away from the hidden layer, and the second conductive layer is attached to or embedded in the second base layer on the side away from the hidden layer.

8. The concealed touch film as described in claim 7, characterized in that, The thickness of the first conductive layer and the second conductive layer is 6μm to 20μm, and the material is a conductive material; The first and second base layers are made of UV adhesive.

9. The concealed touch film as described in claim 1, characterized in that, An anti-glare layer is also provided on the side of the hardened coating away from the first substrate layer, and the anti-glare layer has pits.

10. The concealed touch film as described in any one of claims 1-9, characterized in that, It also includes a second substrate layer, wherein the touch layer is disposed on one side of the second substrate layer; The hidden layer is bonded to the other side of the second substrate layer via an adhesive layer.

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