WO1998056221A1 - A colour changing casing for a device - Google Patents
A colour changing casing for a device Download PDFInfo
- Publication number
- WO1998056221A1 WO1998056221A1 PCT/FI1998/000487 FI9800487W WO9856221A1 WO 1998056221 A1 WO1998056221 A1 WO 1998056221A1 FI 9800487 W FI9800487 W FI 9800487W WO 9856221 A1 WO9856221 A1 WO 9856221A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casing
- compound
- photopia
- colour
- mixed
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
Definitions
- the invention relates to the creation of a desired visual effect in the outer casing of a portable device, for instance an electronic device.
- plastic and/or metal outer casing serving not only as protection and a mechanical component, but also to give the product the desired appearance.
- Plastic or metal has a specific basic colour, and if one wishes to give the casing some other colour, it has to be treated with a coloured paint or lacquer. Due to the current fierce competition manufacturers have to strive to appeal to consumers by means of various visual effects.
- a coloured casing of a new type has now been found for the devices of the kind mentioned above.
- the casing of the device in accordance with the invention changes colour completely or partly as a function of the intensity of the ultraviolet radiation it is exposed to. This phenomenon is produced by using a colourant which changes colour when exposed to ultraviolet radiation as a constituent in the casing material itself or in the paint, lacquer or other coating applied to its surface.
- a colourant which changes colour when exposed to ultraviolet radiation as a constituent in the casing material itself or in the paint, lacquer or other coating applied to its surface.
- the chemical compound known per se and sold under the trade name Photopia which has been developed by Matsui Shikiso Chemical Co. Ltd., is considered the most advantageous colourant in this respect.
- the device casing of the invention may have for instance two colours: a basic colour which is visible when the casing is not exposed to ultraviolet radiation, and in the most preferred embodiment, the colour called Photopia, which becomes visible when the casing is exposed to ultraviolet radiation from the sun for instance.
- the basic colour becomes visible when the device is transferred to a place where it is not exposed to ultraviolet radiation.
- the compound i.e. pigment which changes colour under ultraviolet light can be compounded during the production into the moulding compound from which the casing is made. Suitable plastics are e.g.
- ABS/PC polycarbonate
- PP polypropylene
- PE polyethylene
- PVC polyvinyl chloride
- a second option is mixing a compound which changes colour under ultraviolet light into a paint or a lacquer suitable for painting the plastics mentioned above.
- the application of the second option makes it easy to form numbers, letters and other patterns on the device casing, which will appear only when the device casing is exposed to ultraviolet radiation.
- the Photopia compound mentioned above has proved more advantageous than other known compounds especially in connection with painting, when the final result is compared to the price of the treatment. Sections with different colours may be formed in the same casing with the use of Photopia or similar compounds of different colours in the coating of these sections.
- figure 1 shows a partial cross-section of a casing made by mixing Photopia compound into its moulding resin
- figure 2 shows a partial cross-section of a casing with Photopia compound mixed into the paint applied to its surface
- figure 3 shows how a pattern on a mobile phone casing becomes visible under the effect of ultraviolet radiation.
- the mobile phone casing consists of a plastic blend 1, into which Photopia compound 2 has been mixed during the production.
- the figure shows the Photopia compound as grains poorly admixed with the resin; in reality, a resin blended with Photopia compound is very homogeneous.
- figure 2 is a distorted view of plastic casing 3 in cross-section, coated with paint 4, which has been admixed with Photopia compound 5.
- a specific pattern 7 has been painted with a paint containing Photopia compound on casing 6 of the mobile phone. The more intense the ultraviolet radiation to which the mobile phone casing is exposed, the more distinctly the difference of colour produced by the Photopia compound distinguishes pattern 7 from the basic colour of casing 6.
- the Photopia compound When mixing Photopia compound into the polypropylene mass one has to consider the effect of the raw polypropylene supplied by different manufacturers on the colour of the final product.
- the Photopia compound is supplied by manufacturers as transparent pellets usually containing SHOAROMER MG-471 made by Showa Denko as the base material.
- the base material accounts for 95 ⁇ %, while 5+% consists of the actual colourant reacting to ultraviolet light, a universal colourant and a stabilising agent.
- the pellets are mixed with the desired raw polypropylene (which is also in the form of grains or pellets) in a ratio of 5-10 percent by weight before the injection moulding is started.
- the raw polypropylene may consist of the SHOAROMER MG-471 mentioned above, POLYPRO BJ 340A supplied by Tonen Petroleum & Chemical Company, PP M-1604 supplied by Asahi Kasei or any polypropylene which has proved suitable.
- the two last ones have proved to have a tendency to alter the final colour of the product towards a reddish shade, compared with SHOAROMER MG-471.
- the Photopia compound To allow the Photopia compound to be mixed into the paint, it has first to be mixed as such into an organic solvent and to be simultaneously heated to approx. 80-90°C, preferably above 85°C.
- Suitable solvents are found for instance among alcohols (methanol, isopropyl alcohol and isobutyl alcohol), hydrocarbons (n-hexane, cyclohexane, methyl-cyclohexane, xylene and toluene), halogenated hydrocarbons (carbon tetrachloride and trichlorobenzene), ketones (methyl-ethyl-ketone, cyclohexanone, ethyl acetate, butyl acetate, D.O.P.) and other solvents as well (nitroethane, D.M.F., ethyl-cello solve).
- alcohols methanol, isopropyl alcohol and isobutyl alcohol
- hydrocarbons n-
- the Photopia compound is cautiously mixed with xylene having a flash point of 27.4°C, and is heated to a temperature above 85°C in a water bath, carefully avoiding static sparking.
- xylene is one of the most advantageous organic solvents available. It is also advantageous to use a xylene or a solvent having as high a flash point as possible.
- the mixing ratio is approx. 1 percent by weight of Photopia compound to 99% of solvent. To compensate for evaporation the proportion of solvent may be higher before the heating.
- the mixture of solvent and Photopia is mixed into the desired paint or lacquer in a ratio of approx. 1 volume part of mixture to 20 volume parts of paint or lacquer.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98924355A EP0917813A1 (en) | 1997-06-06 | 1998-06-08 | A colour changing casing for a device |
AU76581/98A AU7658198A (en) | 1997-06-06 | 1998-06-08 | A colour changing casing for a device |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FIU970284 | 1997-06-06 | ||
FI970284U FI3081U1 (en) | 1997-06-06 | 1997-06-06 | Device color changing shell |
FI970306U FI3101U1 (en) | 1997-06-06 | 1997-06-25 | Device color changing shell |
FIU970306 | 1997-06-25 | ||
FI970359U FI3154U1 (en) | 1997-08-18 | 1997-08-18 | Device color changing shell |
FIU970359 | 1997-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998056221A1 true WO1998056221A1 (en) | 1998-12-10 |
Family
ID=27241699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1998/000487 WO1998056221A1 (en) | 1997-06-06 | 1998-06-08 | A colour changing casing for a device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0917813A1 (en) |
AU (1) | AU7658198A (en) |
WO (1) | WO1998056221A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1119155A1 (en) * | 2000-01-20 | 2001-07-25 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Electronic equipment provided with a shell element having a three dimensional appearance |
GB2369521A (en) * | 2000-11-23 | 2002-05-29 | Nokia Mobile Phones Ltd | Thermochromic housing for portable electronic device |
US6466299B1 (en) | 1998-12-30 | 2002-10-15 | Nokia Mobile Phones Ltd. | Mobile station and cover for mobile station having thermochromic liquid crystals |
WO2004026012A1 (en) * | 2002-09-05 | 2004-03-25 | Siemens Aktiengesellschaft | Multifunctional housing |
GB2402750A (en) * | 2003-06-10 | 2004-12-15 | Samsung Electronics Co Ltd | Casing for an electronic device |
KR100594090B1 (en) * | 2003-12-26 | 2006-06-30 | 삼성전자주식회사 | Case for mobile phone using color liuuid crystal |
WO2007057124A1 (en) * | 2005-11-15 | 2007-05-24 | Sony Ericsson Mobile Communications Ab | Cover |
CN107645610A (en) * | 2017-10-19 | 2018-01-30 | 维沃移动通信有限公司 | The control method and mobile terminal of a kind of mobile terminal |
CN110809071A (en) * | 2018-08-06 | 2020-02-18 | Oppo广东移动通信有限公司 | Housing, electronic device, and method for manufacturing housing |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007222A1 (en) * | 1987-03-19 | 1988-09-22 | Xytronyx, Inc. | Systems for the visualization of exposure to ultraviolet radiation and for the utilization of ultraviolet radiation to effect color changes |
DE4212831A1 (en) * | 1992-04-16 | 1993-10-21 | Prolan Oberflaechentechnik Gmb | Transparent form part with scratch-proof and anti-mist properties - comprises plate-shaped substrate and anti-mist layer with one lower edge left free |
-
1998
- 1998-06-08 EP EP98924355A patent/EP0917813A1/en not_active Withdrawn
- 1998-06-08 WO PCT/FI1998/000487 patent/WO1998056221A1/en not_active Application Discontinuation
- 1998-06-08 AU AU76581/98A patent/AU7658198A/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007222A1 (en) * | 1987-03-19 | 1988-09-22 | Xytronyx, Inc. | Systems for the visualization of exposure to ultraviolet radiation and for the utilization of ultraviolet radiation to effect color changes |
DE4212831A1 (en) * | 1992-04-16 | 1993-10-21 | Prolan Oberflaechentechnik Gmb | Transparent form part with scratch-proof and anti-mist properties - comprises plate-shaped substrate and anti-mist layer with one lower edge left free |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6466299B1 (en) | 1998-12-30 | 2002-10-15 | Nokia Mobile Phones Ltd. | Mobile station and cover for mobile station having thermochromic liquid crystals |
EP1119155A1 (en) * | 2000-01-20 | 2001-07-25 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Electronic equipment provided with a shell element having a three dimensional appearance |
WO2001054383A1 (en) * | 2000-01-20 | 2001-07-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Shell element for an electronic equipment with a three dimensional appearance |
GB2369521A (en) * | 2000-11-23 | 2002-05-29 | Nokia Mobile Phones Ltd | Thermochromic housing for portable electronic device |
WO2004026012A1 (en) * | 2002-09-05 | 2004-03-25 | Siemens Aktiengesellschaft | Multifunctional housing |
GB2402750A (en) * | 2003-06-10 | 2004-12-15 | Samsung Electronics Co Ltd | Casing for an electronic device |
GB2402750B (en) * | 2003-06-10 | 2006-11-08 | Samsung Electronics Co Ltd | Improvements in casings for electronic devices |
KR100594090B1 (en) * | 2003-12-26 | 2006-06-30 | 삼성전자주식회사 | Case for mobile phone using color liuuid crystal |
WO2007057124A1 (en) * | 2005-11-15 | 2007-05-24 | Sony Ericsson Mobile Communications Ab | Cover |
CN107645610A (en) * | 2017-10-19 | 2018-01-30 | 维沃移动通信有限公司 | The control method and mobile terminal of a kind of mobile terminal |
CN107645610B (en) * | 2017-10-19 | 2020-07-03 | 维沃移动通信有限公司 | Control method of mobile terminal and mobile terminal |
CN110809071A (en) * | 2018-08-06 | 2020-02-18 | Oppo广东移动通信有限公司 | Housing, electronic device, and method for manufacturing housing |
Also Published As
Publication number | Publication date |
---|---|
AU7658198A (en) | 1998-12-21 |
EP0917813A1 (en) | 1999-05-26 |
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