Light emitting diode linear light modulator with temperature compensation

A light emitting diode (LED) linear light modulator with temperature compensation includes a comparing module, a timing processing module, an LED module and a temperature compensating current control module. The comparing module compares an analog input signal with a triangular wave sampling signal...

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Bibliographic Details
Main Authors LEE, JIA-SI, LIN, CHUN-WEI
Format Patent
LanguageChinese
English
Published 01.02.2017
Subjects
CONTROLLING
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:A light emitting diode (LED) linear light modulator with temperature compensation includes a comparing module, a timing processing module, an LED module and a temperature compensating current control module. The comparing module compares an analog input signal with a triangular wave sampling signal to generate a pulse width modulation (PWM) signal. The PWM signal is inputted into the timing processing module and converted to a digital signal. The temperature compensating current control module, electrically connected to the LED module and the timing processing module, includes a plurality of low-temperature correlated linear current units and a switching switch, and controls a current amount passing through the LED module to generate a low-temperature correlated linear current. Thus, the color temperature of an LED is prevented from drifting with a change in the ambient temperature.
Bibliography:Application Number: TW20154124919