Power switch event detection for led components

Abstract

The present invention relates to lighting systems and in particular to controllers for controlling the lighting state of light sources such as solid state lighting devices such as LED or OLED assemblies. The controller controls the light source according to a plurality of lighting states affected by determination of one of the plurality of events. The controller is also used to control a power converter that converts power derived from the input voltage waveform of the mains power supply into a drive signal for the light source. The controller is also operable to determine an event of a plurality of events encoded in the input voltage waveform of the utility power supply. The first state processor is configured to determine a next state of the plurality of lighting states based on the determined event and based on the current lighting state. When there is no electricity at the mains terminal, the power switch event detection is implemented.

Description

[0001] related application [0002] The present invention relates to lighting systems. In particular it relates to controllers for controlling the lighting state of solid state lighting devices such as LED or OLED assemblies. Background technique [0003] The lighting level of LED or OLED components such as lamps can be controlled by standard power on / off switching, for example, the user can turn on and off the power switch according to the given on / off pattern, so as to send dimming information signals to the lamp components. Control of the light level of the lamp assembly can be accomplished in different ways by applying gradual or continuous dimming to the light source in response to quickly opening and reclosing the power switch. [0004] The challenge of implementing power switch event detection in the lamp assembly is that the function must be performed in the controller of the light bulb assembly, but because the power switch is temporarily in the off position (for ex...

AI Technical Summary

Problems solved by technology

[0005] Using an electrolyte-based capacitor as a temporary power supply for the controller introduces disadvantages to the LED component design, such as long start-up time (large capacitance), additional cost (electrolyte-based capacitors are expensive to produce), additional component size (electrolytic Capacitors have a large form factor), and especially at elevated temperatures have a limited lifetime (electrolytic capacitors dry out)

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