Invention Grant
US09177702B2 PTC composition and resistive device and LED illumination apparatus using the same
有权
PTC组成和电阻器件和使用其的LED照明设备
- Patent Title: PTC composition and resistive device and LED illumination apparatus using the same
- Patent Title (中): PTC组成和电阻器件和使用其的LED照明设备
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Application No.: US14017806Application Date: 2013-09-04
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Publication No.: US09177702B2Publication Date: 2015-11-03
- Inventor: Kuo Chang Lo , Wei Tsang Dai , Yi An Sha , Chun Teng Tseng
- Applicant: Kuo Chang Lo , Wei Tsang Dai , Yi An Sha , Chun Teng Tseng
- Applicant Address: TW Hsinchu
- Assignee: POLYTRONICS TECHNOLOGY CORP.
- Current Assignee: POLYTRONICS TECHNOLOGY CORP.
- Current Assignee Address: TW Hsinchu
- Agency: Egbert Law Offices, PLLC
- Priority: TW102112955A 20130412
- Main IPC: H05B33/00
- IPC: H05B33/00 ; H01C7/02 ; H05B33/08 ; H01C17/065
Abstract:
A PTC composition comprises crystalline polymer and conductive ceramic filler dispersed therein. The crystalline polymer has a melting point less than 90° C. and comprises 5%-30% by weight of the PTC composition. The crystalline polymer comprises ethylene, vinyl copolymer or the mixture thereof. The vinyl copolymer comprises at least one of the functional group selected from the group consisting of ester, ether, organic acid, anhydride, imide or amide. The conductive ceramic filler comprises a resistivity less than 500 μΩ-cm and comprises 70%-95% by weight of the PTC composition. The PTC composition has a resistivity about 0.01-5 Ω-cm and its resistance at 85° C. is about 103 to 108 times that at 25° C.
Public/Granted literature
- US20140306605A1 PTC COMPOSITION AND RESISTIVE DEVICE AND LED ILLUMINATION APPARATUS USING THE SAME Public/Granted day:2014-10-16
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