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US 2021/0263258 A1Published application
Pptc heater and material having stable power and self-limiting behavior
AssigneeLittelfuse, Inc.
InventorJianhua Chen
Life of this patent
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Abstract
A resistance heater may include a polymer positive temperature coefficient (PPTC) material, arranged in a ring shape that defines a heater body; and an electrode assembly, comprising two or more electrodes arranged in contact with the heater body at two or more locations, wherein PPTC material comprises: a polymer matrix, the polymer matrix defining a PPTC body; and a conductive filler component, disposed in the polymer matrix.
Claims16
A resistance heater, comprising:
- a polymer positive temperature coefficient (PPTC) material, arranged in a ring shape that defines a heater body;
- and
- an electrode assembly, comprising two or more electrodes arranged in contact with the heater body at two or more locations,
- wherein PPTC material comprises:
- a polymer matrix, the polymer matrix defining a PPTC body;
- and
- a conductive filler component, disposed in the polymer matrix.
4 more elements
A camera, comprising:
- a transparent lens portion;
- and
- a resistance heater, disposed on a periphery of the transparent lens portion, and comprising:
- a polymer positive temperature coefficient (PPTC) material, arranged in a ring shape within a plane, and defining a heater body, wherein the PPTC material comprises:
- a polymer matrix, the polymer matrix defining a PPTC body, and
- a conductive filler component, disposed in the polymer matrix;
- and
- an electrode assembly, comprising a bottom electrode on a first side of the heater body, and a top electrode, disposed on a second side of the heater body, opposite the first side.
5 more elements
Dependencies are inferred from the claim text.