LED LIGHT WITH TRIAC-BALLASTED

• US 20150208470A1
• Filed: 01/17/2014
• Published: 07/23/2015
• Est. Priority Date: 01/17/2014
• Status: Abandoned Application

• Current Assignee: Shang-Kuei Tsai
• Original Assignee: Shang-Kuei Tsai
• Inventors: LIN, SHIH-CHIANG
• Application Number:
  US14/157,661
• Publication Number:
  US 20150208470A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H05B 45/18 using temperature feedback
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A LED light with TRIAC ballasted contains a thermistor, Ceramic capacitors, resistors, DIAC, TRIAC, bridge rectifiers, and LED lights, such that after a power supply is conducted, a heat and an impedance of the thermistor change, and then a RC charging/discharging time changes to forward or to lag a phase of the DIAC for triggering the TRIAC, thus lowering the power to stabilize LED brightness or to ballast the LED lights. Since the TRIAC-ballasted LED light is simplified, i.e., electrolytic capacitors, transformers, inductors and chips are eliminated, so a failure rate is much lower than conventional switch-mode drive LED lights. Furthermore, high brightness, long service life, less operating current, lower cost, high reliability are achieved. Preferably, a number of the LED lights is increased or decreased based on required brightness and power voltage.

Claims

1. A LED light with TRIAC ballasted comprising:

a thermistor, Ceramic capacitors, resistors, DIAC, TRIAC, bridge rectifiers, and LED lights;

characterized in that the LED lights include a heat sensing module which is comprised of the thermistor and the resistors, and a power conditioning circuit is comprised of the Ceramic capacitors, the resistors, the DIAC, and the TRIAC which are electrically connected together, after the heat sensing module is serially coupled with the bridge rectifiers and the LED lights applied direct current or after the heat sensing module is serially coupled with the LED lights applied alternating current, the power conditioning circuit is connected with a mains supply;

after conducting power supply, electric current passes through the resistors to produce heat and decrease an impedance of the thermistor, wherein a first Ceramic capacitor connects with the thermistor, and a second Ceramic capacitor couples with the power conditioning circuit so as to enhance capacity in a parallel connecting manner, to prolog RC charging/discharging time, and to lag a phase of the DIAC for triggering the TRIAC, thus lowering the power;

when the power reduces and the electric current passing through the resistors decreases, a lower heat produces and the impedance of the thermistor NTC amplifies, the first Ceramic capacitor connects with the thermistor, and the second Ceramic capacitor parallelly couples with the power conditioning circuit so as to lower the capacity, to shorten the RC charging/discharging time, to forward the phase of the DIAC and to enhance the power, so the power is increased or decreased automatically to stabilize LED brightness or to ballast the LED lights.

2. The LED light as claimed in claim 1, wherein the thermistor is adhered on the resistors by ways of a thermal conductive adhesive or is welded on adjacent copper foils by means of a SMD thermistor and a SMD current limiting resistor, such that after the power supply is conducted, the heat and the impedance of the thermistor change, and then the RC charging/discharging time changes to forward or to lag the phase of the DIAC, thus lowering the power to stabilize LED brightness or to ballast the LED lights.