EP0917813A1 - Boitier changeant de couleur con u pour un dispositif - Google Patents

Boitier changeant de couleur con u pour un dispositif

Info

Publication number
EP0917813A1
EP0917813A1 EP98924355A EP98924355A EP0917813A1 EP 0917813 A1 EP0917813 A1 EP 0917813A1 EP 98924355 A EP98924355 A EP 98924355A EP 98924355 A EP98924355 A EP 98924355A EP 0917813 A1 EP0917813 A1 EP 0917813A1
Authority
EP
European Patent Office
Prior art keywords
casing
compound
photopia
colour
mixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98924355A
Other languages
German (de)
English (en)
Inventor
Rainer Eugen NÄSSLING
Jaime Cataldo Monsaldes
Kari Jukka Hokkanen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
R-Design Ltd
Original Assignee
R-Design Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI970284U external-priority patent/FI3081U1/fi
Priority claimed from FI970306U external-priority patent/FI3101U1/fi
Priority claimed from FI970359U external-priority patent/FI3154U1/fi
Application filed by R-Design Ltd filed Critical R-Design Ltd
Publication of EP0917813A1 publication Critical patent/EP0917813A1/fr
Withdrawn legal-status Critical Current

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 blending of a pigment which changes colour under ultraviolet radiation with a moulding resin, paint or lacquer has to be performed following a specific course of actions.
  • the Photopia compound mentioned above cannot be mixed with ABS plastic, because, during the moulding of the plastic product in question, the ABS plastic has to be heated to such a high temperature that the Photopia compound decomposes.
  • the Photopia compound can be used mixed into the moulding resin for instance in the production of products from polypropylene, because polypropylene does not require heating to such a high temperature that does ABS plastic.
  • 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

L'invention concerne un boîtier changeant de couleur (6) conçu pour un dispositif, lequel boîtier contient un composé (2, 5) qui change de couleur sous l'effet d'une lumière ultraviolette. Afin de changer la couleur du boîtier complètement ou sur des parties souhaitées (7) sous l'effet d'un rayonnement ultraviolet, on mélange le composé dans le matériau de base (1) du boîtier ou à son revêtement (4).
EP98924355A 1997-06-06 1998-06-08 Boitier changeant de couleur con u pour un dispositif Withdrawn EP0917813A1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
FI970284U 1997-06-06
FI970284U FI3081U1 (fi) 1997-06-06 1997-06-06 Laitteen väriä vaihtava kuori
FI970306U FI3101U1 (fi) 1997-06-06 1997-06-25 Laitteen väriä vaihtava kuori
FI970306U 1997-06-25
FI970359U 1997-08-18
FI970359U FI3154U1 (fi) 1997-08-18 1997-08-18 Laitteen väriä vaihtava kuori
PCT/FI1998/000487 WO1998056221A1 (fr) 1997-06-06 1998-06-08 Boitier changeant de couleur conçu pour un dispositif

Publications (1)

Publication Number Publication Date
EP0917813A1 true EP0917813A1 (fr) 1999-05-26

Family

ID=27241699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98924355A Withdrawn EP0917813A1 (fr) 1997-06-06 1998-06-08 Boitier changeant de couleur con u pour un dispositif

Country Status (3)

Country Link
EP (1) EP0917813A1 (fr)
AU (1) AU7658198A (fr)
WO (1) WO1998056221A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI982837A (fi) 1998-12-30 2000-07-01 Nokia Mobile Phones Ltd Elektroninen laite, elektronisen laitteen kuori ja elektronisen laitte en kuoren valmistusmenetelmä
DE60018895T2 (de) * 2000-01-20 2006-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Schalenteil eines elektronischen Geräts mit einer dreidimensionalen Erscheinung
GB2369521A (en) * 2000-11-23 2002-05-29 Nokia Mobile Phones Ltd Thermochromic housing for portable electronic device
JP2005537675A (ja) * 2002-09-05 2005-12-08 シーメンス　アクチエンゲゼルシヤフト マルチファンクショナルケーシング
GB2426829B (en) * 2003-06-10 2007-09-12 Samsung Electronics Co Ltd Improvements in casings for electronic devices
KR100594090B1 (ko) * 2003-12-26 2006-06-30 삼성전자주식회사 칼라 액정을 이용한 휴대 단말기의 케이스
US20070123178A1 (en) * 2005-11-15 2007-05-31 Eral Foxenland Cover
CN107645610B (zh) * 2017-10-19 2020-07-03 维沃移动通信有限公司 一种移动终端的控制方法及移动终端
CN110809071A (zh) * 2018-08-06 2020-02-18 Oppo广东移动通信有限公司 壳体、电子装置和壳体的制造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU612143B2 (en) * 1987-03-19 1991-07-04 Xytronyx, Inc. Systems for the visualization of exposure to ultraviolet radiation and for the utilization of ultraviolet radiation to effect color changes
DE4212831A1 (de) * 1992-04-16 1993-10-21 Prolan Oberflaechentechnik Gmb Vorzugsweise transparentes Formteil mit kratzfesten und Anti-Beschlag-Eigenschaften und Verfahren zu dessen Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9856221A1 *

Also Published As

Publication number Publication date
WO1998056221A1 (fr) 1998-12-10
AU7658198A (en) 1998-12-21

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