Patent ID: 7499003
Filing Date: 2009-03-03
Classification: F24C,H05B

Abstract:
1. A cooking range comprising: a user interface having a plurality of touch pad buttons further comprising an informational display area; a microprocessor-based LED fader electronic control system that executes a time-stepping algorithm including reading data from a digitized exponential curve that corresponds to time, the microprocessor based LED fader electronic control system further comprising: wherein the LED fader electronic control system receives an input from the user interface and further processes the information to reduce or increase at least a portion of the light intensity of the LED array, wherein the control system provides a varying voltage to the LED array, wherein the control system includes a transistor that is operated to output a varying voltage, wherein the pulse width modulated output signal controls an operation of the transistor, wherein the frequency of the pulse width modulated output signal is variable and changes exponentially over time, and wherein the digital to analog circuit includes a capacitor connected to an output of the transistor such that a voltage at the transistor output is averaged to an analog voltage.