Image panel with synthetic image by color change by backlighting

Abstract

Embodiments of an image panel are provided. The image panel includes a transparent substrate having a first major surface and a second major surface opposite the first major surface. A first image layer is disposed on the second major surface. A diffuser layer is disposed on the first image layer, and a second image layer is disposed on the diffuser layer. The second image layer includes a masked region and an image region. An optical density of the image panel is at least 3.0 in the masked region and less than 3.0 in the image region. The image region is not visible from the first major surface when light is not incident on the second major surface. The image region is visible from the first major surface and forms a composite image with the first image layer when light is incident on the second major surface.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to U.S. Provisional Application Serial No. 63 / 004,723, filed April 3, 2020, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to a decorative image panel, and more specifically, to a decorative image panel that displays a first image under ambient light and displays a composite image when the image panel is backlit. Background Technology

[0004] Glass has been incorporated into decorative, architectural, and electronic design. In many cases, glass is used specifically because of its transparency. However, in other cases, images can be incorporated onto or within glass to provide decorative effects. As glass continues to be used for more and more diverse purposes, designers and consumers have been exploring different ways to achieve decorative effects on glass surfaces. Summary of the Invention

[0005] In one aspect, embodiments of this disclosure relate to an image panel. The image panel includes a transparent substrate having a first main surface and a second main surface. The second main surface is opposite to the first main surface. The image panel also includes a first image layer disposed on the second main surface of the transparent substrate. A diffuse layer is disposed on the first image layer, and a second image layer is disposed on the diffuse layer. The second image layer includes at least one shielding region and at least one image region. The optical density of the image panel is at least 3.0 in the at least one shielding region and less than 3.0 in the at least one image region. When light is not incident on the second main surface of the transparent substrate, at least one image region is not visible from the first main surface of the transparent substrate. When light is incident on the second main surface of the transparent substrate, at least one image region is visible from the first main surface of the transparent substrate and forms a composite image with the first image layer.

[0006] In another aspect, embodiments of this disclosure relate to a method for fabricating an image panel. In this method, a first image layer is applied to a transparent substrate. The transparent substrate includes a first main surface and a second main surface opposite to the first main surface. The first image layer is disposed on the second main surface. A diffuse layer is applied to the first image layer, and a second image layer is applied to the diffuse layer. The second image layer includes at least one shading region and at least one image region. The optical density of the image panel is at least 3.0 in at least one shading region and less than 3.0 in at least one image region. When no light is incident on the second main surface, only the first image layer is visible from the first main surface, and when light is incident on the second main surface, a composite image of at least one image region of the first and second image layers is visible from the first main surface.

[0007] In another aspect, embodiments of this disclosure relate to a method for generating an image on an image panel. The image panel includes a transparent substrate, a first image layer disposed on the transparent substrate, a diffuse layer disposed on the first image layer, and a second image layer disposed on the diffuse layer. The second image layer has at least one shaded area and at least one image area, and the optical density of the image panel is at least 3.0 in the at least one shaded area and less than 3.0 in the at least one image area. In this method, the second image layer of the image panel is illuminated from the rear side of the image panel using backlighting, such that a composite image of the first image layer and the at least one image area is visible from the viewing side of the image panel opposite to the rear side.

[0008] In another aspect, embodiments of this disclosure relate to an image unit. The image unit includes an image panel and a backlight on the rear side of the image panel, the image panel having a viewing side and a rear side opposite to the viewing side. The image panel includes a transparent substrate having a first main surface on the viewing side and a second main surface on the rear side. A first image layer is disposed on the second main surface of the transparent substrate, and a diffuse layer is disposed on the first image layer. A second image layer having at least one shielding area and at least one image area is disposed on the diffuse layer. The light density of the image panel is at least 3.0 in at least one shielding area and less than 3.0 in at least one image area. When no light is incident on the rear side of the image panel, only a first image defined by the first image layer is visible from the viewing side. The backlight is configured to illuminate the second main surface of the transparent substrate such that a composite image of the first image layer and at least one image area is visible from the viewing side.

[0009] Additional features and advantages will be set forth in the following detailed description, and some of these features and advantages will be apparent to those skilled in the art from the description or will be recognized by practice of the embodiments described herein, including the following detailed description, the claims, and the accompanying drawings.

[0010] It should be understood that the foregoing description of the invention and the following detailed description are merely exemplary and are intended to provide an overview or framework for understanding the nature and features of the claims. Attached Figure Description

[0011] This document includes accompanying drawings to provide a further understanding; the drawings are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiments and, together with the textual description, serve to explain the principles and operation of the various embodiments. In the drawings:

[0012] Figure 1 A schematic partial cross-sectional view of a backlight image unit according to an exemplary embodiment is shown. The backlight image unit has an image panel configured to display a composite image.

[0013] Figure 2 A schematic cross-sectional view of an image panel according to an exemplary embodiment is shown;

[0014] Figure 3A and 3B The transformation of an image panel from a first image to a composite image with additional elements, according to an exemplary embodiment, is illustrated.

[0015] Figure 4A and 4B The transformation of an image panel from a first image of a first color to a composite image of a second color, according to an exemplary embodiment, is shown.

[0016] Figure 5A and 5B The transformation of the image panel from a first image to a newly synthesized image according to an exemplary embodiment is shown;

[0017] Figure 6 This is a schematic diagram of an electronic device having an image unit as a backplane according to an exemplary embodiment. Detailed Implementation

[0018] Referring generally to the accompanying drawings, various embodiments of an image panel are provided, the image panel being configured to display a composite image when illuminated by a backlight unit. In embodiments, the image panel may be a decorative or architectural panel, displaying a first image under ambient light and a composite image of the first image and a lower image when the panel is illuminated by a backlight. In embodiments, the image panel includes a first image layer disposed on a transparent substrate. A diffuse layer is disposed on the first image layer and configured to block the lower image layer under ambient light. The lower image is disposed on the diffuse layer and includes opaque areas and image areas. When the backlight unit illuminates the lower image layer, the first image is altered by changing colors, adding effects to the image, and / or generating a new image. These effects are collectively referred to as a "composite image" because the image visible to the user is a composite of two image layers.

[0019] In certain embodiments, the image panel is incorporated into the electronic device, for example, as a back panel or side panel, and is illuminated using the backlight of the display unit. Thus, taking a mobile phone as an example, when the phone is in sleep mode, the back panel can display a first image, but when the front display is activated, the back panel will display a composite image using the activated backlight unit. This concept is applicable to other electronic devices, especially those that include a display and already incorporate backlighting, such as laptops, tablets, monitors, etc. These and other aspects and advantages will be described below in conjunction with the accompanying drawings. The embodiments of the image panel discussed herein are provided by way of example and not as a limitation.

[0020] Figure 1 This is a schematic cross-sectional view of a decorative or architectural panel, which will be referred to as image unit 100. Image unit 100 includes an image panel 102 located within a housing 104. A backlight unit 106 is also disposed within the housing 104. The backlight unit 106 is located behind the image panel 102. As will be discussed below, image unit 100 may be incorporated into another structure (e.g., an architectural structure, such as a wall, floor, ceiling, door, etc.) or device (e.g., an electronic device, such as a mobile phone, laptop computer, monitor, tablet computer, etc.). In an embodiment, backlight unit 106 is at least one of an incandescent lamp, an LED array, an electroluminescent panel, a cold cathode fluorescent lamp, a hot cathode fluorescent lamp, an external electrode fluorescent lamp, or an active display unit (as discussed below). In an embodiment, backlight unit 106 is configured to provide illumination of 300 to 350 lumens on the image panel 102.

[0021] Figure 2 The structure of the image panel 102 is shown. (See diagram.) Figure 2 As can be seen, the image panel 102 includes a transparent substrate 120, a first image layer 121, a diffuse layer 122, and a second image layer 124. The second image layer 124 includes at least one opaque area 126 and at least one image area 128.

[0022] In this embodiment, the substrate 120 is transparent glass or plastic. For example, a suitable glass substrate 120 may include at least one of silicates, sodium-calcium silicates, borosilicates, aluminosilicates, aluminoborosilicates, alkali metal aluminosilicates, and alkaline earth metal aluminosilicates. This glass may be chemically or thermally strengthened. Commercially available glasses suitable for use as transparent substrates are... Glass (available from Corning, NY). Suitable transparent plastic substrate 120 includes polycarbonate or acrylic panels.

[0023] The substrate 120 has a first main surface 130 and a second main surface 132. The first main surface 130 is on the side of the substrate 120 opposite to the second main surface 132. In an embodiment, the first main surface 130 is a viewing surface, wherein the first main surface 130 faces the viewer. The second main surface 132 faces the backlight unit 106 (e.g., Figure 1 (As shown). As will be discussed more fully below, when the backlight unit 106 is not enabled, the first image layer 121 is illuminated by ambient light, making the first image layer 121 visible to the viewer. When the backlight unit 106 is enabled, the second main surface 132 is illuminated, making the viewer see a composite image of the image areas of the first image layer 121 and the second image layer 124. The transparent substrate 120 has a thickness of no more than 2 mm, no more than 0.7 mm, or no more than 0.55 mm, defined by the distance between the first main surface 130 and the second main surface 132. In embodiments, the transparent substrate 120 has a thickness of at least 0.1 mm, at least 0.2 mm, at least 0.3 mm, or at least 0.4 mm.

[0024] A first image layer 121 is disposed on a first main surface 130 or a second main surface 132 of the substrate 120. In an embodiment, the first image layer 121 is disposed on the second main surface 132, such that the substrate 120 is located between the viewer and the first image layer 121 to protect the first image layer 121 from damage. The first image layer 121 can be applied to the substrate 120 in various ways. In an embodiment, the first image layer 121 is printed on the substrate 120 using techniques such as inkjet printing, slot printing, screen printing, pad printing, or gravure printing. In another embodiment, the first image layer 121 is a decal pattern or transfer pattern adhered to the substrate 120. In an embodiment, the first image layer 121 is translucent and has an optical density of 0.5 or less.

[0025] A diffuse layer 122 is disposed on the first image layer 121 and is designed to scatter and reflect light. In this way, the diffuse layer 122 enhances the visibility of the first image layer 121 by reflecting ambient light passing through the translucent first image layer 121. Additionally, when the backlight unit 106 is not enabled, the diffuse layer 122 scatters light, including light passing through the first image layer 121 and the diffuse layer 122, to effectively conceal the image area 128 of the second image layer 124. In an embodiment, the diffuse layer 122 has an optical density of 1.0 to 2.0. In an embodiment, the diffuse layer 122 is a white material layer. In a particular embodiment, the diffuse layer 122 is a white ink layer. Furthermore, in an embodiment, the diffuse layer 122 may be composed of multiple layers or multiple coatings of white material (such as white ink) until a desired total optical density of the diffuse layer 122 is achieved. In an embodiment, the total optical density of the substrate 120, the first image layer 121, and the diffuse layer 122 is 1.5 to 2.5.

[0026] A second image layer 124 is disposed on the diffuse layer 122. As described above, the second image layer 124 includes one or more opaque areas 126 and one or more image areas 128. The opaque areas 126 are designed to block light from the backlight unit 106 from passing through the first image layer 121. Therefore, the opaque areas 126 are made of a material configured to increase the total light density of the image panel in the opaque areas 126 to at least 3.0. In an embodiment, the opaque areas 126 are a layer of black ink. Similar to the first image layer 121, the image areas 128 are translucent and have a light density of 0.5 or less. In this way, light is configured to pass through the image panel 102 from the backlight unit 106 in the image areas 128. Therefore, the light density of the image panel 102 in the image areas 128 is less than 3.0.

[0027] Similar to the first image layer 121, the second image layer 124 can be applied to the diffuse layer 122 using the printing or image transfer techniques described above. Furthermore, in embodiments, the second image layer 124 can be applied to the image panel 102 in one or two steps. In one embodiment, an opaque area 126 is applied in a first step to substantially produce a negative of the second image. Subsequently, the image area 128 is applied in a second step. Alternatively, the image area 128 can be applied first, followed by the opaque area 126. In another embodiment, the opaque area 126 and the image area 128 can be applied simultaneously, for example, by inkjet printing of successive second image layers 124.

[0028] Figure 3A and 3B The image panel 102 shows the first image 140 from the first image layer 121. Figure 3A ) is transformed into a composite image 142 of the first image layer 121 and image region 128. Figure 3B Example of a composite image 142. In this embodiment, the composite image 142 is an image with elements added to the first image 140. As schematically shown, the first image 140 is composed of the shape of the center of the image panel 102. When the image panel is illuminated by the backlight unit 106, the image area 128 adds elements to the corners of the image panel 102 to produce the composite image 142.

[0029] Figure 4A and 4B The image panel 102 shows the first image 140 ( Figure 4A ) transformed into a synthetic image 142 ( Figure 4BAnother example. This example demonstrates a color change in a first image 140. For example, the first image layer 140 is a first color (e.g., green), and the composite image 142 is a second color (e.g., orange). To achieve the desired second color 142, a color wheel printed on a separate substrate can be used to perform a simulation. For example, the first substrate may include a first image layer 121 with a first color wheel, and a diffuse layer 122 disposed on the first image layer 121. On a second substrate, a second color wheel is printed as a second image layer 124. Then, the desired first color is selected, and the desired second color is envisioned, the second color wheel on the second substrate is illuminated with backlight, and the second color wheel is rotated until the desired second color is illuminated at the location of the desired first color. In this way, the color of the image area 128 of the second image layer 124 can be determined so that when mixed with the first color of the first image 140, the desired second color of the composite image 142 is produced.

[0030] In this embodiment, the CMYK color model, as a subtractive color model, along with halftone processing, can be used to further facilitate color selection. Specifically, the backlight unit 106 can emit white light, and the first image 140 can subtract a combination of cyan, magenta, or yellow from the light to produce a first color. Therefore, a second color can be selected by subtracting additional amounts of cyan, magenta, or yellow from the light to produce a second color.

[0031] Once the two colors of the image areas 128 of the first image layer 121 and the second image layer 124 are selected, the densities of the image layers 121 and 124 can be determined to produce the desired precise color when the image panel 102 is illuminated. In an embodiment, the first color is printed horizontally or vertically on the first substrate at varying densities, for example, varying from a low density (10%) to a high density (100%) in predetermined increments, and a diffuse layer is printed on the first color. Then, the second color is printed on the second substrate in the opposite direction, for example, if the first color is printed horizontally, the second color is printed vertically. The substrates are then stacked on a backlight unit that illuminates the substrate, thereby providing a mixture of the first and second colors at varying color densities.

[0032] When determining the color of the image area 128 of the first image layer 121 and the second image layer 124, layers 121, 122, and 124 can be printed or applied to the substrate 120 of the image panel 102.

[0033] Figure 5A and 5B The image shown is from the first image 140 ( Figure 5A ) Generate a new image as a composite image 142 ( Figure 5B Examples of implementations. For example... Figure 5A As shown, the first image 140 is circular, and as... Figure 5BAs shown, when the image panel 102 is illuminated by the backlight unit 106, the composite image 142 is square.

[0034] Figures 3A-3B The examples shown in 4A-4B and 5A-5B are simple in nature and intended to illustrate different possibilities for generating the synthetic image 142. In practice, the synthetic image 142 may include a combination of two or more example transformations. For example, Figure 3A The first image shown may include a first color of a shape at the center of the image panel and a second color of the area surrounding that shape. Therefore, when image area 128 is illuminated, the shape in the corner will not only be shown, but will also be a combination of the lower color of image area 128 and the surrounding color of the first image layer 121. In this embodiment, the composite image 142 will present additional elements and color variations (e.g., such as...). Figure 4A and 4B (Illustrated schematically). Similarly, Figure 3A The center shape can also be transformed according to the specific configuration of the second image layer 124, such as... Figure 5B The new image shown.

[0035] Figure 6 An embodiment is shown in which the image unit 100 is incorporated into the electronic device 200 as a backplane of the electronic device 200. Figure 6 In this embodiment, the electronic device 200 includes a display unit 210 disposed behind a cover glass 220. The display unit 210 and the cover glass 220 may have various intervening layers, such as a touch-sensitive layer providing touch functionality for interaction with the display unit 210. In embodiments, the electronic device 200 is, for example, a mobile phone, tablet computer, laptop computer, or monitor. The display unit 210 may be any of a light-emitting diode (LED) display device, an organic LED (OLED) display device, a quantum dot (QLED) display device, a plasma display device, or a liquid crystal display (LCD) device. The display unit 210 may include a backlight unit 106, in which case the image panel 102 and the display unit 210 may be backlit by the same backlight unit 106. In other embodiments, a separate backlight unit 106 is incorporated and positioned rearward to provide backlighting to the image panel 102.

[0036] In this embodiment, the electronic device 200 has a sleep mode or off mode in which the display unit 210 and the backlight 106 are not enabled. In this mode, the first image 140 of the image panel 102 will be seen by the user. When the user enables the electronic device 200, the display unit 210 and the backlight unit 106 are enabled and illuminate the image panel 102 to provide a decorative or informational effect as a composite image 142 of the image panel 102.

[0037] Unless otherwise expressly stated, it is not intended to interpret any method described herein as requiring its steps to be performed in a particular order. Therefore, no particular order is intended to be inferred where a method claim does not actually describe the order in which its steps are followed, or where the claim or specification does not specifically state that these steps will be limited to a particular order. Furthermore, as used herein, the article “a” is intended to include one or more components or elements and is not intended to be construed as referring to only one.

[0038] It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the disclosed embodiments. Since modifications, combinations, sub-combinations, and variations of the disclosed embodiments in conjunction with the spirit and substance of the embodiments will be apparent to those skilled in the art, the disclosed embodiments should be interpreted as encompassing all contents within the scope of the appended claims and their equivalents.

Claims

1. An image panel, comprising: A transparent substrate includes a first main surface and a second main surface, wherein the second main surface is opposite to the first main surface; A first image layer is disposed on the second main surface of the transparent substrate; A diffuse layer is disposed on the first image layer, wherein the light density of the diffuse layer is 1.0 to 2.0, and wherein the diffuse layer reflects ambient light that initially passes through the first image layer to enhance the visibility of the first image layer through the transparent substrate from the ambient light; A second image layer is disposed on the diffuse layer, the second image layer including at least one occlusion area and at least one image area, wherein the diffuse layer is configured to block the visibility of the at least one image area from the ambient light; Wherein, the optical density of the image panel is at least 3.0 in the at least one shaded area, and less than 3.0 in the at least one image area; and When the second main surface of the transparent substrate is backlit, the at least one image area is visible from the first main surface of the transparent substrate and forms a composite image with the first image layer.

2. The image panel according to claim 1, wherein, The transparent substrate is at least one of glass or plastic.

3. The image panel according to claim 1, wherein, The first image layer has an optical density of 0.5 or less.

4. The image panel according to claim 1, wherein, The optical density of at least one image region in the second image layer is 0.5 or less.

5. The image panel according to any one of claims 1 to 4, wherein, In the at least one image region, the first image layer includes a first color with a first CMYK value, the second image layer includes a second color with a second CMYK value, and the composite image includes a third color with a third CMYK value, the third CMYK value being different from the first CMYK value and the second CMYK value.

6. The image panel according to any one of claims 1 to 4, wherein, The first image layer includes a decal pattern adhered to the second main surface of the transparent substrate.

7. The image panel according to any one of claims 1-4, wherein, The first image layer includes an ink layer printed onto the second main surface of the transparent substrate.

8. The image panel according to any one of claims 1-4, wherein, The diffuse layer includes one or more layers of white ink printed onto the first image layer.

9. The image panel according to any one of claims 1-4, wherein, The at least one shaded area includes black ink printed onto the diffuse layer.

10. The image panel according to any one of claims 1-4, wherein, The at least one image area includes an ink area disposed on the diffuse layer.

11. A method for preparing an image panel, comprising: A first image layer is applied to a transparent substrate, the transparent substrate including a first main surface and a second main surface opposite to the first main surface, the first image layer being disposed on the second main surface; A diffuse layer is applied to the first image layer, wherein the light density of the diffuse layer is 1.0 to 2.0, and wherein the diffuse layer reflects ambient light that initially passes through the first image layer to enhance the visibility of the first image layer through the transparent substrate from the ambient light; and A second image layer is applied on the diffuse layer, the second image layer including at least one occlusion area and at least one image area, wherein the diffuse layer is configured to block the visibility of the at least one image area from the ambient light, and wherein the light density of the image panel is at least 3.0 in each of the at least one occlusion area and less than 3.0 in each of the at least one image area; Specifically, when the second main surface is not backlit, only the first image layer is visible from the first main surface, and when the second main surface is backlit, the composite image of at least one image region of the first image layer and the second image layer is visible from the first main surface.

12. The method according to claim 11, wherein, The transparent substrate is at least one of glass or plastic.

13. The method according to claim 11, wherein, The first image layer has an optical density of 0.5 or less.

14. The method according to claim 11, wherein, The optical density of at least one image region in the second image layer is 0.5 or less.

15. The method according to any one of claims 11-14, wherein, Applying the first image layer includes adhering a decal pattern to the second main surface of the transparent substrate.

16. The method according to any one of claims 11-14, wherein, Applying the first image layer includes printing an ink layer onto the second main surface of the transparent substrate.

17. The method according to any one of claims 11-14, wherein, Applying the diffuse layer includes printing one or more layers of white ink onto the first image layer.

18. The method according to any one of claims 11-14, wherein, Applying the second image layer includes simultaneously applying the at least one masking region and the at least one image region.

19. The method according to any one of claims 11-14, wherein, Before applying either the at least one masking area or the at least one image area, apply the other of the at least one masking area.

20. The method according to any one of claims 11-14, wherein, Applying the second image layer includes printing the at least one masking area and the at least one image area onto the diffuse layer.

21. The method according to any one of claims 11-14, wherein, Each application step includes at least one of inkjet printing, screen printing, or dye sublimation.

22. A method for generating an image on an image panel, wherein, The image panel includes a transparent substrate, a first image layer disposed on the transparent substrate, a diffuse layer disposed on the first image layer, and a second image layer disposed on the diffuse layer. The diffuse layer has an optical density of 1.0 to 2.

0. The second image layer includes at least one shaded area and at least one image area. The optical density of the image panel is at least 3.0 in the at least one shaded area and less than 3.0 in the at least one image area. The method includes: The second image layer of the image panel is illuminated from the rear side of the image panel using backlighting, so that a composite image of the first image layer and the at least one image area is visible from the viewing side of the image panel opposite to the rear side.

23. The method according to claim 22, wherein, The illumination step includes emitting light with a brightness of 300 to 350 lumens.

24. The method of claim 22 or 23, further comprising disabling the backlight such that the second image layer of the image panel is not illuminated, and such that the first image of the first image layer is visible from the viewing side of the image panel.

25. An image unit, comprising: An image panel having a viewing side and a rear side opposite to the viewing side, the image panel comprising: A transparent substrate includes a first main surface on the viewing side and a second main surface on the rear side; A first image layer is disposed on the second main surface of the transparent substrate; A diffuse layer is disposed on the first image layer, wherein the light density of the diffuse layer is 1.0 to 2.0, and wherein the diffuse layer reflects ambient light that initially passes through the first image layer to enhance the visibility of the first image layer through the transparent substrate from the ambient light; and A second image layer comprising at least one occlusion area and at least one image area is disposed on the diffuse layer, wherein the diffuse layer is configured to block the visibility of the at least one image area from the ambient light; Wherein, the optical density of the image panel is at least 3.0 in each of the at least one shading area, and less than 3.0 in each of the at least one image area; and Wherein, when the rear side of the image panel is not illuminated by backlight, only the first image defined by the first image layer is visible from the viewing side; and A backlight, on the rear side of the image panel, is configured to illuminate the second main surface of the transparent substrate, such that a composite image of the first image layer and the at least one image area is visible from the viewing side.

26. The image unit according to claim 25, wherein, The backlight includes at least one of an incandescent lamp, an LED array, an electroluminescent panel, a cold cathode fluorescent lamp, a hot cathode fluorescent lamp, an external electrode fluorescent lamp, or an active display unit.

27. The image unit according to claim 25, wherein, The backlight is configured to emit light with a brightness of 300 to 350 lumens.

28. An electronic device comprising: Image unit according to any one of claims 25-27; as well as Display unit.

29. The electronic device according to claim 28, wherein, The display unit includes at least one of a light-emitting diode (LED) display device, an organic LED (OLED) display device, a quantum dot (QLED) display device, a plasma display device, or a liquid crystal display (LCD) device.

30. The electronic device according to claim 28, wherein, The display unit and the image unit use the same backlight unit.

31. The electronic device according to claim 28, wherein, The electronic device is a mobile phone, tablet computer, laptop computer, or monitor.

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