Patent ID: 7817009

Claim:
A light emitting diode (LED) apparatus with temperature control function, comprising: at least one LED chip; at least one heat dissipation plate carrying the LED chip and dissipating heat of the LED chip when the LED chip is connected to an electric power source; at least one temperature control device exhibiting positive temperature coefficient (PTC) behavior and being electrically connected in series between the LED chip and the electric power source, and having a distance from the LED chip less than 3 centimeters; and at least one heat conductive layer comprising polymeric dielectric material being laminated between the heat dissipation plate and the LED chip, and the heat conductive layer having a heat conductive coefficient larger than 1.0 W/mK at 25° C.; wherein the at least one temperature control device directly self-regulates a current flowing through the LED chip without associating with a control IC.