Back to results
US 12,750,933 B2Granted
Driving system for a lighting apparatus
AssigneeRenesas Design (UK) Limited
InventorChang Yu Wu
Life of this patent
Estimating the term…
Abstract
A driving system for a lighting apparatus comprising a plurality of light sources, the driving system comprising a controller configured to provide a first digital control signal to the lighting apparatus, the first digital control signal having a first duty cycle and a first frequency, and control the first frequency of the first digital control signal.
Claims19
A driving system for a lighting apparatus comprising a plurality of light sources, the driving system comprising a controller configured to:
- provide a first digital control signal to the lighting apparatus, the first digital control signal having a first duty cycle and a first frequency;
- and
- control the first frequency of the first digital control signal to increase or decrease the first frequency, wherein the controller comprises:
- a frequency determination unit configured to determine a first frequency setting for the first frequency of the first digital control signal;
- a digital signal generation unit configured to:
- generate the first digital control signal;
- and
- set the first frequency of the first digital control signal based on the first frequency setting, thereby controlling the first frequency of the first digital control signal;
- and
- a detection unit configured to detect a property of the lighting apparatus, wherein the frequency determination unit is configured to determine the first frequency setting based on the detected property of the lighting apparatus, the detection unit comprises a brightness calculation unit configured to determine a brightness of at least one of the plurality of lights sources, and the property of the lighting apparatus is a brightness of at least one of the plurality of light sources.
7 more elements
An apparatus comprising:
- a lighting apparatus comprising a plurality of light sources;
- and
- a driving system comprising a controller configured to:
- provide a first digital control signal to the lighting apparatus, the first digital control signal having a first duty cycle and a first frequency;
- and
- control the first frequency of the first digital control signal to increase or decrease the first frequency, wherein the controller comprises:
- a frequency determination unit configured to determine a first frequency setting for the first frequency of the first digital control signal;
- a digital signal generation unit configured to:
- generate the first digital control signal;
- and
- set the first frequency of the first digital control signal based on the first frequency setting, thereby controlling the first frequency of the first digital control signal;
- and
- a detection unit configured to detect a property of the lighting apparatus, wherein the frequency determination unit is configured to determine the first frequency setting based on the detected property of the lighting apparatus, the detection unit comprises a brightness calculation unit configured to determine a brightness of at least one of the plurality of lights sources, and the property of the lighting apparatus is a brightness of at least one of the plurality of light sources.
10 more elements
A method of controlling a lighting apparatus comprising a plurality of light sources using a driving system comprising a controller, the method comprising:
- providing a first digital control signal to the lighting apparatus using the controller, the first digital control signal having a first duty cycle and a first frequency;
- and
- controlling the first frequency of the first digital control signal, using the controller to increase or decrease the first frequency,
- operating a frequency determination unit in the controller to determine a first frequency setting for the first frequency of the first digital control signal;
- operating a digital signal generation unit in the controller to generate the first digital control signal and set the first frequency of the first digital control signal based on the first frequency setting, thereby controlling the first frequency of the first digital control signal;
- operating a detection unit in the controller to detect a property of the lighting apparatus, wherein operating the frequency determination unit is configured to determine the first frequency setting is based on the detected property of the lighting apparatus;
- and
- operating a brightness calculation unit in the detection unit to determine a brightness of at least one of the plurality of lights sources, wherein the property of the lighting apparatus is a brightness of at least one of the plurality of light sources.
5 more elements
Dependencies are inferred from the claim text.