Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Patent
1997-07-08
1999-07-27
Wong, Don
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Discharge device load
315363, H05B 3700
Patent
active
059295686
ABSTRACT:
An incandescent bulb luminance matching LED circuit for causing the luminance of an LED to match the luminance of an incandescent bulb is disclosed. The incandescent bulb luminance matching LED circuit includes an input port (26, 56 or 82), an output port (28, 58 or 98), one or more light emitting diodes (22, 24, . . . or 88, 90 . . .), and a voltage (20 or 89) and/or current (50 or 86) compensation block. The compensation block(s) is connected in circuit with the light emitting diode(s) between the input port and the output port and compensates for voltage and/or current changes in the power applied to the input port such that the luminance of the LED is approximately the same as that of an incandescent bulb. In one embodiment, the compensation block comprises a zener diode (30) connected in series with the light emitting diode(s) (22, 24, . . .) between the input port (26) and the output port (28). In an alternate embodiment, the compensation block comprises one or more current diode(s) (60, 62, . . .) connected in parallel with the light emitting diode(s) (52, 54, . . .) between the input port (56) and the output port (58). In yet another embodiment, the compensation block comprises both a zener diode (92) connected in series with the light emitting diode(s) (88, 90, . . .) and a one or more current diode(s) (100, 102, . . .) connected in parallel with the light emitting diode(s) (88, 90, . . .).
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Korry Electronics Co.
O'Connor Christensen
Vu David H.
Wong Don
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