Optical structure comprising textured layer having plurality of microperforations

Abstract

The invention relates to an optical structure (6) configured to be placed in front of an image emitting device (4) configured to emit an initial image adjusted by the optical structure (6) to form an adjusted image visible to an observer (8). The optical structure (6) comprises:-a textured layer (10) placed on an observer side (8) of the optical structure (6),-a protective layer (18) placed between the textured layer (10) and the image-emitting device (4), the protective layer (18) preferably being a light-transmissive protective layer (18), wherein the optical structure (6) comprises a plurality of microperforations (12) in the textured layer (10) and the protective layer (18), the microperforations having a size of less than 100 [mu] m, and the microperforations (12) are arranged such that the observer (8) perceives an adjusted image through the microperforations (12).

Description

Technical Field

[0001] The present invention relates to an optical structure configured to be placed in front of an image emitting device, the image emitting device configured to emit an initial image modified by the optical structure to form a modified image visible to an observer. The present invention also relates to an image display system including such an optical structure. The present invention also relates to a method of manufacturing such an optical structure. Background Art

[0002] WO 2021 200 344 A1 discloses an example of a display device having a decorative sheet, the decorative sheet including a design layer having micropores, on which a design is printed with ink. The decorative sheet has a transparent sheet covering the design layer.

[0003] Vehicles are often equipped with display systems that convey various information to the driver, such as speed and temperature data. These display systems are integrated into the vehicle's instrument panel. For example, the instrument panel may include an area with a decorative layer that has a wood-like texture. Images may need to be displayed on this area. Summary of the Invention

[0004] The present invention is directed to meeting this need.

[0005] This object is achieved by an optical structure configured to be placed in front of an image emitting device, the image emitting device being configured to emit an initial image adjusted by the optical structure to form an adjusted image visible to an observer, and the optical structure comprising:

[0006] - a textured layer, which is placed on the observer side of the optical structure,

[0007] - a protective layer placed between the textured layer and the image emitting device, the protective layer preferably being a light-transmitting protective layer, wherein the optical structure comprises the textured layer and a plurality of microperforations in the protective layer, the microperforations having a size below 100 μm and arranged such that an observer perceives the adjusted image through the microperforations.

[0008] "Size" refers to the distance between two points of the outline of a microperforation.

[0009] Notably, the presence of microperforations in the textured layer improves the sharpness of the image by correcting the light scattering that occurs at the textured layer and the protective layer.

[0010] Thus, the adjusted image passing through the microperforations has improved clarity compared to an adjusted image passing through the textured layer and protective layer without any microperforations.

[0011] Furthermore, the present invention provides a textured layer that can be perceived by touch of a human body part, and an adjusted image with improved sharpness on the textured layer.

[0012] "Image" refers to any type of image, such as a moving image, a static image, or a continuous series of images. This definition applies to both "initial image" and "adjusted image." "Image" is used to display the following information, in a non-exhaustive manner: "GPS information," "speed counter," "temperature information," "speedometer," "decorative information," and so on.

[0013] The "protective layer" provides protection against scratches to increase the overall durability of the optical structure.

[0014] According to one aspect of the invention, the textured layer and the protective layer have substantially the same chemical composition.

[0015] According to one aspect of the invention, the textured layer and the protective layer are made of ink or of varnish.

[0016] According to one aspect of the present invention, the optical structure further includes, from the observer side to the image emitting device, the following sequence:

[0017] - a light-transmitting intermediate layer, in particular made of a material chosen from polymethyl methacrylate (PMMA) and other polymers having optical properties and hardness comparable to PMMA; and

[0018] -Decorative layer.

[0019] According to one aspect of the invention, the decorative layer comprises a decoration formed by:

[0020] - forming a decorative visible pattern visible from the observer's side.

[0021] Despite the presence of the decoration, the decorative layer allows the adjusted image to be correctly visible and readable by a viewer.

[0022] According to one aspect of the invention, the protective layer is configured to facilitate decoration, for example, by modifying the appearance of the visible pattern of the decorative layer, including aspects such as color, opacity, and glossy or matte finish.

[0023] According to one aspect of the invention, the textured layer is configured to facilitate decoration, for example, by modifying the appearance of the visible pattern of the decorative layer, including aspects such as color, opacity, and glossy or matte effects.

[0024] According to one aspect of the present invention, the textured layer has a plurality of tactile patterns, the sizes of which are selected so that the tactile patterns can be perceived by touch of a human body part.

[0025] According to one aspect of the present invention, the tactile pattern is selected from the following patterns:

[0026] - Wood texture, hairline, geometric tones, silk fabric, non-slip texture, rubber texture.

[0027] According to one aspect of the present invention, the height of each tactile pattern is greater than 5 μm.

[0028] According to one aspect of the invention, the width of each tactile pattern is between 200 μm and 5 mm.

[0029] According to one aspect of the invention, the visible pattern has the shape of the following pattern:

[0030] - Wood texture, hairline, geometric tones, silk fabric, non-slip texture, rubber texture.

[0031] According to one aspect of the invention, each tactile pattern has an area with a plurality of microperforations.

[0032] These microperforations, which are less than 100 μm in size, cannot be discerned by the sense of touch on any part of the human body. Therefore, the tactile sensation is provided solely by the presence of one or more tactile patterns. For example, when the tactile patterns mimic the cross-section of wood, each tactile pattern corresponding to the wood grain has an area with multiple microperforations. These microperforations are small enough that an observer can only perceive the overall image of the group, not the individual microperforations.

[0033] According to one aspect of the invention, the textured layer is fully microperforated.

[0034] According to one aspect of the invention, each tactile pattern is fully microperforated.

[0035] The size of the microperforations is less than 100 μm, preferably 20 μm to 80 μm, more preferably 30 μm to 70 μm.

[0036] According to one aspect of the invention, the tactile pattern of the textured layer overlaps the visible pattern of the decorative layer.

[0037] For example, each tactile pattern in the textured layer corresponds to a visible pattern in the decorative layer (ie, wood grain, leather grain), having the appearance of a cross-section of wood or the appearance of genuine leather.

[0038] According to one aspect of the present invention, the width of each visible pattern is in the range between 200 μm and 5 mm.

[0039] According to one aspect of the invention, the microperforations extend at least through the thickness of the textured layer and the protective layer.According to one aspect of the invention, the protective layer is fully microperforated.

[0040] According to one aspect of the invention, the microperforations extend only through the thickness of the textured layer and the protective layer.

[0041] In this case, the textured layer and other layers beneath the protective layer are not microperforated.

[0042] According to one aspect of the invention, the microperforations extend at least through the thickness of the textured layer, the protective layer and the light-transmitting intermediate layer.

[0043] According to one aspect of the invention, the microperforations extend through the thickness of the textured layer, the protective layer, the light-transmitting intermediate layer, and the decorative layer.

[0044] In this case, the textured layer, the protective layer, the light-transmitting intermediate layer and other layers below the decorative layer are not microperforated.

[0045] According to one aspect of the present invention, the optical structure further comprises a light transmission enhancing layer placed between the decorative layer and the image emitting device.

[0046] According to one aspect of the present invention, the light transmission enhancing layer is made of a material selected from polycarbonate (PC) and other polymers having mechanical properties and high temperature stability comparable to PC.

[0047] According to one aspect of the present invention, the decorative layer is semi-translucent or semi-transparent.

[0048] The semi-transmissive or translucent decorative layer allows the adjusted image to be correctly visible and readable by an observer despite the presence of the decoration.

[0049] "Transparent" refers to a material or layer that allows light or images to pass through, so that objects behind it can be clearly seen. In other words, objects behind a "transparent" material or layer are clearly visible through the material or layer.

[0050] "Opaque" refers to a material or layer that's not transparent enough to see through or allow light or images to pass through. In other words, the term "opaque" is the opposite of "transparent." "Translucent" refers to a material or layer that's nearly transparent, allowing some light or images to pass through. In other words, objects behind the material or layer are obscured and visible through it.

[0051] "Semi-transparent" refers to a material or layer that is more opaque than a "transparent" material or layer.

[0052] "Translucent" refers to a material or layer that is less transparent to light than a "translucent" material or layer.

[0053] According to one aspect of the present invention, the light-transmitting intermediate layer is transparent, translucent or semi-transmissive.

[0054] According to one aspect of the present invention, the textured layer is opaque, translucent or translucent.

[0055] According to one aspect of the present invention, the protective layer is opaque, translucent or translucent.

[0056] According to one aspect of the invention, the textured layer and / or the decorative layer comprises ink.

[0057] According to one aspect of the present invention, the textured layer comprises opaque ink, semi-transparent ink or semi-transparent ink.

[0058] The use of such inks can be combined with the presence of microperforations. In particular, due to the presence of the microperforations, the image from the image emitting device can pass through the textured layer despite the presence of the opaque ink. The translucent ink and the semi-transmissive ink partially filter the original image from the image emitting device, while the opaque ink completely filters the original image from the image emitting device.

[0059] For example, when the image emitting device displays the image defined above, a "semi-transparent" ink may be used for the decorative layer.

[0060] For example, when the image-emitting device is a light-emitting device (such as a backlit symbol illuminated by an LED), a "translucent" ink with slightly light-scattering properties can be used to provide visibility of the backlit symbol in dark ambient light conditions. The slightly scattering nature of the translucent ink allows for better light conditioning, making the light passing through the material or layer containing such ink more uniform. This prevents the light emitted by the backlit symbol from becoming too intense in certain areas, forming light "hot spots."

[0061] According to one aspect of the present invention, the optical structure has a light transmittance lower than 50%, preferably lower than 40%, and a light transmittance range between 15% and 35%.

[0062] Due to the enhanced light transmittance of the optical structure, the decorative layer is clearly visible on the observer side, for example, when the image emitting device is turned off.

[0063] When the image emitting device is turned on, the visible pattern of the decoration allows partial transmission of the image from the image emitting device, making the decorative layer visible dimly while the visible pattern of the decorative layer is clearly visible. When the transmittance is too low, for example, below 15%, the visible pattern is unclear from the observer's side. When the image emitting device is turned off, excessive transmittance of the optical structure can render the decorative pattern invisible, with only the black background behind it visible. Therefore, the indicated range represents a good balance between the visibility of the visible pattern from the observer's side and the transmittance of light through the optical structure.

[0064] According to one aspect of the present invention, the cross section of the micro-perforations has at least one shape selected from the following shapes: circular, oval, elliptical, and polygonal.

[0065] For example, when the microperforations have a circular shape, the largest dimension of the circular microperforations (ie, the diameter of the circular shape) is less than 100 μm.

[0066] For example, when the microperforations have an elliptical shape, the largest dimension of the elliptical microperforations is below 100 μm.

[0067] According to one aspect of the present invention, the surface of the textured layer is treated to have at least one of the following properties: antimicrobial, hard coating, anti-reflective, low-reflective, anti-glare coating, anti-fingerprint, and glitter reduction.

[0068] According to one aspect of the invention, the microperforation of the textured layer is achieved by at least one of the following techniques: laser and / or mechanical perforation.

[0069] These techniques allow the texture pattern to be partially or completely microperforated.For example, where the textured layer comprises peaks and valleys, both the peaks and valleys may be microperforated, preferably with a laser, so as to reach the same depth.

[0070] The present invention also relates to an image display system, comprising:

[0071] - forming a display panel of the image emitting device; and

[0072] - an optical structure according to the invention placed on the observer side of the image display system.

[0073] According to one aspect of the present invention, the image display system further includes:

[0074] -Touch panel;

[0075] - at least one extruded plastic layer, for example a thermoplastic layer;

[0076] - at least one transparent adhesive layer, such as an optically clear adhesive (OCA) layer or an optically clear resin (OCR) layer; and / or

[0077] - At least one supporting substrate made of a material such as polycarbonate (PC) or glass.

[0078] The "support substrate" is an intermediate protective plate that protects the optical structure and the display panel from any mechanical stress.

[0079] According to one aspect of the invention, the optical structure is on a supporting substrate.

[0080] According to one aspect of the present invention, the image display system includes, from the observer side to the image emitting device, the following steps:

[0081] - an optical structure according to the invention;

[0082] - said at least one supporting substrate between two transparent adhesive layers; and

[0083] - forming a display panel of an image emitting device.

[0084] According to one aspect of the present invention, the image display system includes, from the observer side to the image emitting device, the following steps:

[0085] - an optical structure according to the invention;

[0086] - said at least one supporting substrate between two transparent adhesive layers;

[0087] - a touch panel on a transparent adhesive layer; and

[0088] - forming a display panel of an image emitting device.

[0089] According to one aspect of the present invention, the image display system includes, from the observer side to the image emitting device, the following steps:

[0090] - an optical structure according to the invention;

[0091] - said extruded plastic layer;

[0092] - a transparent adhesive layer; and

[0093] - forming a display panel of an image emitting device.

[0094] According to one aspect of the present invention, the image display system includes, from the observer side to the image emitting device, the following steps:

[0095] - an optical structure according to the invention;

[0096] - said extruded plastic layer;

[0097] - a touch panel between two transparent adhesive layers; and

[0098] - forming a display panel of an image emitting device.

[0099] According to one aspect of the present invention, the thickness of the transparent adhesive layer is less than 500 μm.

[0100] According to an aspect of the present invention, the display panel is selected from a liquid crystal display panel, a light emitting diode panel, an organic light emitting diode panel and a quantum light emitting diode panel.

[0101] The invention also relates to a vehicle instrument panel comprising an optical structure according to the invention.

[0102] The present invention also relates to a method for producing an optical structure according to the present invention, comprising the following steps:

[0103] - microperforating at least the textured layer and the protective layer, in particular the light-transmitting protective layer, to form a plurality of microperforations having a size of less than 100 μm, and

[0104] - arranging the microperforations such that an observer perceives the adjusted image through the microperforations.

[0105] According to one aspect of the present invention, the method further comprises the following steps before the step of micro-perforating at least the textured layer and the protective layer:

[0106] - Combine the textured layer with:

[0107] said light-transmitting intermediate layer; and

[0108] The decorative layer

[0109] Assemble.

[0110] According to one aspect of the present invention, the method further comprises the following steps:

[0111] - microperforating the light-transmitting intermediate layer and the decorative layer simultaneously with microperforating the textured layer and the protective layer.

[0112] According to one aspect of the present invention, the method comprises the following steps:

[0113] - Laminating the optical structure onto the support substrate using a transparent adhesive layer between the optical structure and the support substrate.

[0114] According to one aspect of the present invention, the method further comprises the following steps:

[0115] - Overmolding (in particular using in-mold labeling) an optical structure according to the invention in said optical display device.

[0116] According to one aspect of the present invention, the method further comprises the following steps:

[0117] - placing the optical structure in a mold having the shape of the optical display device;

[0118] - and back-injecting the thermoplastic resin into the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0119] Further advantages, features and details of the invention will become apparent from the following description of preferred exemplary embodiments with the aid of the accompanying drawings, in which:

[0120] Figure 1 is a cross-sectional view of an image display system including an embodiment of an optical structure according to the present invention,

[0121] Figure 2 shows a cross-sectional view of an image display system comprising an alternative embodiment of an optical structure according to the present invention,

[0122] Figure 3 shows a top view of an initial image emitted by an image emitting device, the initial image being located directly above the image emitting device,

[0123] Figure 4 shows a top view of the adjusted image as seen from the observer side,

[0124] Figure 5 shows a schematic and enlarged view of microperforations in a tactile pattern in a textured layer,

[0125] Figure 6 Shown Figure 1 An image of an embodiment of a display system showing a cross-section and partial view of a tactile pattern in a textured layer and a visible pattern in a decorative layer,

[0126] Figure 7 shows a cross-sectional view of a first embodiment of an image display system assembled by lamination,

[0127] Figure 8 shows a cross-sectional view of a second embodiment of an image display system assembled by lamination,

[0128] Figure 9 shows a cross-sectional view of a first embodiment of an image display system assembled by overmolding,

[0129] Figure 10 A cross-sectional view of a second embodiment of an image display system assembled by overmolding is shown.

[0130] Identical components or components having the same function are provided with the same reference numerals in the figures. DETAILED DESCRIPTION

[0131] refer to Figures 1 to 2 and Figures 7 to 10 , the image display system 2 according to the present invention comprises:

[0132] - a display panel 4 forming the image emission means 4; and

[0133] An optical structure 6 placed on the observer side 8 of the image display system 2 .

[0134] The optical structure 6 comprises a textured layer 10 placed on the observer side 8 of the optical structure 6 and a light-transmitting protective layer 18 placed between the textured layer 10 and the image-emitting device 4 .

[0135] The optical structure 6 comprises a plurality of microperforations 12 having a dimension D of less than 100 μm in a textured layer 10 and a light-transmitting protective layer 18. Both the textured layer 10 and the light-transmitting protective layer 18 are completely microperforated.

[0136] refer to Figures 1 to 4 and Figures 7 to 10 , the optical structure 6 is placed in front of the display panel 4 forming an image emitting device 4 configured to emit the initial image 14 modified by the optical structure 10 to form a modified image 16 visible to the observer 8.

[0137] The microperforations 12 are arranged such that an observer s perceives the adjusted image 16 through the microperforations 12. Notably, the presence of the microperforations 12 in the textured layer 10 improves the sharpness of the image by correcting the light scattering that occurs at the textured layer 10.

[0138] Thus, the adjusted image 16 passing through the microperforations 12 has improved sharpness compared to the adjusted image 16 passing through the textured layer 10 and protective layer 18 without any microperforations 12 .

[0139] Furthermore, the present invention provides a textured layer 10 that can be perceived by touch of a human body part, and an adjusted image 16 having improved sharpness on the textured layer 10 .

[0140] From the observer side 8 to the display panel 4 forming the image emission device 4, the optical structure 6 further comprises, in order:

[0141] - a light-transmitting intermediate layer 20 made of polymethyl methacrylate (PMMA); and

[0142] -Decorative layer 22;

[0143] a light transmission enhancing layer 24 made of polycarbonate (PC) placed between the decorative layer 22 and the image emitting device 4 .

[0144] The light-transmitting protective layer 24 provides protection against scratches to increase the overall durability of the optical structure 6 .

[0145] The textured layer 10 and the light-transmitting protective layer 18 have substantially the same chemical composition.

[0146] The textured layer 10 and the light-transmitting protective layer 18 are made of a translucent ink 26 .

[0147] exist Figure 1 In the embodiment of FIG. 5 , the microperforations 12 extend only through the thickness of the textured layer 10 and the light-transmitting protective layer 18 .

[0148] In this case, the textured layer 10 and the other layers 20, 22, 24 below the light-transmitting protective layer 18 are not microperforated.

[0149] exist Figure 2 In the embodiment of FIG. 5 , the microperforations 12 extend through the thickness of the textured layer 10 , the light-transmitting protective layer 18 , the light-transmitting intermediate layer 20 , and the decorative layer 22 .

[0150] In this case, the layers 24 underlying the textured layer 10, ie, the light-transmitting protective layer 18, the light-transmitting intermediate layer 20, and the decorative layer 22, are not microperforated.

[0151] refer to Figure 4 , the optical structure 6 comprises a decorative layer 22 comprising a decoration 30 formed by a visible pattern 32 having a wood grain shape forming the decoration 30 visible from the observer side 8 .

[0152] The texturizing layer 10 and the light-transmitting protective layer 18 also contribute to the decoration 30 by modifying the color of the wood grain 32 of the decorative layer 22 .

[0153] like Figures 1 to 2 and Figures 7 to 10 As shown, the textured layer 10 has a plurality of tactile patterns 42. The dimensions 46 and 48 of the tactile patterns 42 are selected so that the tactile patterns 42 can be felt by touch by a part of the human body. In other words, the height 46 of each tactile pattern is greater than 5 μm. The width 48 of each tactile pattern is in the range between 200 μm and 5 mm.

[0154] These microperforations having a dimension D of less than 100 μm cannot be discerned by touch of a human body part. Therefore, the tactile sensation is provided only by the presence of one or more tactile patterns 42. Figure 5 , each tactile pattern 44 corresponding to the wood grain 32 is completely microperforated. These microperforations 12 are small enough that the observer 8 can only see the overall image of the group, but not the individual microperforations 12.

[0155] refer to Figure 5 The cross section of the micro-perforations 12 in the tactile pattern 42 has a circular shape. The diameter D of the circular micro-perforations 12 is less than 100 μm.

[0156] Figure 6 Shown Figure 1 The image display system 2 of the embodiment of FIG. 1 shows a cross-sectional and partial view of the system 2, showing the tactile pattern 42 in the textured layer 10 and the visible pattern 32 in the decorative layer 22. Figure 6 In the example of FIG. 4 , only one tactile pattern 42 is shown for illustration purposes, although the textured layer 10 has multiple tactile patterns 42 and the decorative layer 22 has multiple visible patterns 32, as shown in FIG. Figures 1 to 2 、 Figure 4 and Figures 7 to 10 shown.

[0157] refer to Figure 4 and Figure 6 , the width of each visible pattern 32 is also within the range between 200 μm and 5 mm. Figure 6 In the example shown in FIG, tactile patterns 42 of textured layer 10 overlap visible patterns 32 (or wood grain 32) of decorative layer 22. Each tactile pattern 42 in textured layer 10 corresponds to a wood grain 32 in the decorative layer that has the appearance of a cross-section of wood. Thus, both visible patterns 32 and tactile patterns 42 have the shape of wood grain 32.

[0158] Figure 7 and Figure 8 The embodiment shows an image display system 2 assembled by lamination.

[0159] according to Figure 7 In a specific embodiment, the image display system 2 includes, from the observer side 8 to the display panel 4, the following:

[0160] - optical structure 6;

[0161] a supporting substrate 50 made of glass between two layers of optically clear adhesive (OCA) 52 ; and

[0162] - a display panel 4 forming the image emission means 4 .

[0163] The "support substrate" 50 is an intermediate protective plate to protect the optical structure 6 and the display panel 4 from any mechanical stress.

[0164] according to Figure 8 In a specific embodiment, the image display system 2 includes, from the observer side 8 to the display panel 4, the following:

[0165] - optical structure 6;

[0166] - a support substrate 50 made of PC between two OCA layers 52;

[0167] - a touch panel 54 on the OCA layer 52; and

[0168] - a display panel 4 forming the image emission means 4 .

[0169] exist Figure 8 In this example, the support substrate 50 may also be made of glass.

[0170] Figure 9 and 10 The embodiment shows an image display system 2 assembled using in-mold labeling.

[0171] according to Figure 9 In a specific embodiment, the image display system includes, from the observer side to the image emitting device, the following steps:

[0172] - optical structure 6;

[0173] - a thermoplastic layer 56;

[0174] -OCA layer 52; and

[0175] - a display panel 4 forming the image emission means 4 .

[0176] according to Figure 10 In a specific embodiment, the image display system 2 includes, in order from the observer side 8 to the image emitting device 2:

[0177] - optical structure 6;

[0178] - a thermoplastic layer 56;

[0179] - a touch panel 54 between two OCA layers 52; and

[0180] - a display panel 4 forming the image emission means 4 .

[0181] The present invention also relates to a vehicle instrument panel (not shown) including an optical structure 6. Optical structure 6 can be integrated into the vehicle instrument panel so that a user can touch and interact with textured layer 10. Optical structure 6 can be used to display any type of adjusted image 16 generated from an initial image 14, such as a moving image, a static image, or a continuous series of images. "Images" can be used to display the following information, in a non-exhaustive manner: "GPS information," "speedometer," "temperature information," "tachymeter," "decorative information," and so on.

[0182] The display panel 4 may be selected from a liquid crystal display panel, a light emitting diode panel, an organic light emitting diode panel, and a quantum light emitting diode panel.

[0183] For all embodiments of the present invention, the light transmittance of the optical structure 6 is in the range between 15% and 35%, and the thickness of the OCA layer 52 is less than 500 μm.

[0184] for Figures 7 to 10 In the embodiment, the micro-perforations 12 may extend:

[0185] - only through the thickness of the textured layer 10 and the light-transmitting protective layer 18, or

[0186] - through the thickness of the textured layer 10 , the light-transmitting protective layer 18 , the light-transmitting intermediate layer 20 and the decorative layer 22 .

[0187] The above embodiments are illustrative and non-restrictive embodiments. Obviously, many modifications and variations of the present invention are possible according to the above teachings without departing from the inventive concept of the present invention. Therefore, it should be understood that the present invention can be implemented in the manner specifically described.

Claims

1. An optical structure (6) configured to be placed in front of an image emitting device (4), the image emitting device (4) being configured to emit an initial image (14) adjusted by the optical structure (6) to form an adjusted image (16) visible to an observer (8), and the optical structure (6) comprising: a textured layer (10) placed on the observer side (8) of the optical structure (6), a protective layer (18) placed between the textured layer (10) and the image emitting device (4), the protective layer (18) preferably being a light-transmitting protective layer (18), wherein the optical structure (6) comprises a plurality of microperforations (12) in the textured layer (10) and the protective layer (18), the microperforations (12) having a size (D) of less than 100 μm, and The microperforations (12) are arranged such that the observer (8) perceives the adjusted image (16) through the microperforations (12).

2. The optical structure (6) according to claim 1, further comprising, from the observer side (8) to the image emitting device (4): - a light-transmitting intermediate layer (20), in particular made of a material chosen from polymethyl methacrylate (PMMA) and other polymers having optical properties and hardness comparable to PMMA; and -Decorative layer (22).

3. The optical structure (6) according to claim 2, further comprising a light transmission enhancing layer (24) disposed between the decorative layer (22) and the image emitting device (4).

4. The optical structure (6) according to claim 2 or 3, wherein the decorative layer (22) comprises a decoration (30), and the decoration (30) is formed by: - a visible pattern (32) which forms a decoration (30) visible from the observer side (8).

5. The optical structure (6) according to claim 4, wherein the visible pattern (32) is selected from the following patterns: - Wood texture, hairline, geometric tones, silk fabric, grip texture, rubber texture.

6. The optical structure (6) according to any one of the preceding claims, wherein the textured layer (10) has a plurality of tactile patterns (42), the dimensions (46, 48) of the tactile patterns (42) being selected such that the tactile patterns (42) can be perceived by touch with a part of the human body.

7. The optical structure (6) according to claim 6, wherein each tactile pattern (42) has an area with a plurality of microperforations (12).

8. The optical structure (6) according to any one of claims 2 to 7, wherein The microperforations extend only through the thickness of the textured layer and the protective layer.

9. The optical structure (6) according to any one of claims 2 to 7, wherein the microperforations (12) extend through the thickness of the textured layer (10), the protective layer (18), the light-transmitting intermediate layer (20) and the decorative layer (10).

10. The optical structure (6) according to any one of the preceding claims, wherein the optical structure has a light transmittance lower than 50%, preferably lower than 40%, with the light transmittance ranging between 15% and 35%.

11. An image display system (2), comprising: - forming a display panel (4) of the image emitting device (4); and An optical structure (6) according to any one of claims 1 to 10 placed on the observer side (8) of the image display system (2).

12. The image display system (2) according to claim 11, further comprising: - touch panel (54); - at least one extruded plastic layer (56), for example a thermoplastic layer; - at least one transparent adhesive layer (52), such as an optically clear adhesive (OCA) layer or an optically clear resin (OCR) layer; and / or - At least one supporting substrate (50) made of a material such as polycarbonate (PC) or glass.

13. A vehicle instrument panel comprising the optical structure (6) according to any one of claims 1 to 10.

14. A method for manufacturing an optical structure (6) according to any one of claims 1 to 10, the method comprising the following steps: - microperforating at least the textured layer (10) and the protective layer (18), in particular the light-transmitting protective layer (18), to form a plurality of microperforations (12) having a size (D) of less than 100 μm, and - arranging the microperforations (12) such that the observer (8) perceives the adjusted image (16) through the microperforations (12).

Images