Patent Application
20100259940
1. Technical Field
The present disclosure relates to a cover for a display screen, especially to a cover for a display screen having a mirror-like appearance and an electronic device by having the cover for a display screen.
2. Description of Related Art
A cover for a display screen having a metallic appearance is often considered more attractive. The common method of manufacturing the cover for a display screen having the metallic appearance is by applying a metal coating on the cover for a display screen using vacuum deposition. The metal coating should not block electromagnetic waves, and at the same time, the metal coating should have high light transmission property. However, metal coatings sometimes block too much light.
Therefore, there is room for improvement within the art.
Many aspects of the cover for a display screen and an electronic device having such a cover can be better understood with reference to the following figures. The components in the figures are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the cover for a display and the electronic device. Moreover, in the drawings like reference numerals designate corresponding parts throughout the several views.
Referring to
The substrate 11 may be made of transparent plastic selected from a group consisting of polypropylene (PP), polyamide (PA), polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene terephthalate (PET). Alternatively, the substrate 11 may be made of glass.
The base coating 13 may be a transparent ultraviolet (UV) curable paint coating. The UV curable paint may be polyurethane acrylate paint. The base coating 13 may have a thickness of about 6-12 μm.
The light transmission enhancing coating 15 may be a silicon dioxide film or a titanium dioxide film applied, for example, by vacuum deposition. The light transmission enhancing coating 15 may have a thickness of about 50-100 nm.
The metallic coating 17 may be, for example, an indium coating, a tin coating, or an aluminum silicon coating formed by vacuum deposition. The metallic coating 17 may have a metallic appearance. The metallic coating 17 may have a thickness in a range of about 50-150 nm, which should provide the desired metallic appearance without blocking excessive radio signals. When the cover for a display screen 10 is fixed on an electronic device and the electronic device is not in use, no light is emitted from the electronic device. Therefore, the metallic coating 17 will be highly reflective and have a mirror-like appearance. When the electronic device is in use the coatings allow light to be transmitted therethrough.
The top coating 19 may be a transparent paint coating having a thickness of about 8-15 μm. The paint used for forming the top coating 19 may be UV curable paint, polyurethane paint, or unsaturated polyester paint. In this exemplary embodiment, UV curable paint is used for the top coating 19. The top coating 19 may have a high rigidity and can protect the metallic coating 17 from abrasion. The paint used for the top coating 19 can be tinted for aesthetic reasons as long as it remains transparent.
The base coating 13 is applied as the bonding agent between the light transmission coating 15 and the substrate 11 but may be omitted in applications that allows a bond to be formed by applying the light transmission enhancing coating 15 directly on the substrate 11.
The top coating 19 may be omitted in applications where abrasion of the cover for a display screen is not a concern.
The exemplary electronic device 20 may be a mobile phone, a PDA, a MP3 or a MP4.
It should be understood, however, that though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200910301517.3 | Apr 2009 | CN | national |
