Electrothermal color-varying device and toy utilizing the same

Details Electrothermal color-varying device and toy utilizing the same Electrothermal color-varying device and toy utilizing the same

H - Electricity

05

B

H05B 3/12 (2006.01) A63H 3/00 (2006.01) A63H 3/36 (2006.01) A63H 33/00 (2006.01) A63H 33/22 (2006.01) G02F 1/01 (2006.01)

Patent

CA 2050235

There is disclosed an electrothermal color-varying device inducing color change in a thermally color-varying layer by heat generation in an electro-thermal heat-generating member, in which the heat-generating member is composed of a non-metallic member hailing a positive temperature coefficient on the electric resistance at least in a temperature; range 25°C to 65°C and a paticular volume resistivity, is adapted to generate heat by the application of a low voltage and is capable of self-control of the saturated heating temperature at an arbitrary temperature within a range of 25°C to 65°C, whereby improved safety is achieved without the danger of overheating or current leakage. Also there are disclosed toys utilizing such color-varying device.

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