Method and Apparatus of Drive Currents Control Over a Solid State Light Source
AssigneeAppotronics Corporation Limited
InventorsFei Hu, Yi Li, Yi Yang, Liangliang Cao
Life of this patent
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Abstract
A solid state light source module includes two solid state light sources, a light combining device for combining the lights from the two sources, a color wheel receiving the combined light and alternatingly outputting at least two primary color lights, a sync signal generator coupled to the color wheel for generating a periodic sync signal, and a controller for supplying a drive signal to each solid state light sources based on the sync signal. During at least one sub-period of the period, one of the two solid state light sources is turned on by its drive signal and the other one is kept in an inactive state by its drive signal.
Claims17
A solid state light source module comprising:
- at least two solid state light sources for generating at least two corresponding lights of different colors, each light containing at least one primary color component;
- a light combining device for combining the at least two lights into a combined light containing at least two primary color components;
- an output device for alternatingly outputting the at least two primary color components of the combined light to generate an output light having a predefined color sequence which repeats every period;
- a sync signal generator coupled to the output device for generating a periodic sync signal;
- and
- a controller coupled to the sync signal generator and to each of the at least two solid state light sources, for supplying a drive signal to each of the at least two solid state light sources based on the sync signal,
- wherein during at least one sub-period of the period, one of the at least two solid state light sources is turned on by its drive signal and another one of the at least two solid state light sources is kept in an inactive state by its drive signal.
A solid state light source module comprising:
- a first solid state light sources for generating a first lights containing a first and a second primary color component;
- a first color wheel disposed to receive the first light, the first color wheel including a first segment and a second segment;
- a first drive mechanism for driving the first color wheel to rotate, wherein the first segment and the second segment are alternatingly disposed on a path of the first light, wherein the first and second segments of the first color wheel filter the converted light to generate filtered light containing a sequence of first primary color component and second primary color component;
- a second solid state light source for generating a second light containing a third primary color component;
- a light combining device for combining the filtered light from the first color wheel and the second light into a combined light;
- a sync signal generator coupled to the first color wheel for generating a periodic sync signal;
- and
- a controller coupled to the sync signal generator and to the first and second solid state light sources, for supplying a drive signal to each of the first and second solid state light sources based on the sync signal,
- wherein during at least one sub-period of each rotation of the first color wheel, one of the first and second solid state light sources is turned on by its drive signal and the other one of the first and second solid state light sources is kept in an inactive state by its drive signal.
A method for controlling a light source module for a projector device, comprising:
- (a) generating at least two primary color lights of different colors using at least two solid state light sources and combining them into one combined light containing at least two primary color components, and alternatingly outputting the at least two primary color components;
- (b) generating a periodic sync signal using a sync signal detector;
- and
- (c) using a controller to controls the drive power of the at least two solid state light sources based on the sync signal, so that during at least some sub-periods within each period of the periodic sync signal, at least one solid state light source is turned on and at least one slid state light source is inactive.
Dependencies are inferred from the claim text.