A projection apparatus comprising: at least two solid state light sources for generating at least two light beams directly or indirectly, with the at least two light beams having different colors and being output alternately, the at least two solid state light sources comprising a first solid state light source for generating an excitation light which is converted to a converted light; a second solid state light source for generating a third primary color light which is combined with the converted light into a combined light; a wavelength conversion device for converting the excitation light to the converted light; a first color wheel disposed to receive the incident converted light, the first color wheel comprising 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 in a path of the converted light, so that the converted light is filtered by the first segment to generate a first primary color light and is filtered by the second segment to generate a second primary color light; a light combining device combining the converted light and the third primary color light into the combined light to illuminate the first color wheel, wherein the first color wheel further includes a third segment, the first, second and third segments are alternatingly disposed in a path of the combined light, and wherein the third primary color light pass through the third segment; a sync signal generator for generating a sync signal; and a controller for supplying a drive power in pulse manner to each of the at least two solid state light sources based on the sync signal, wherein during at least one sub-period, one of the at least two solid state light sources is in working status and another one of the at least two solid state light sources is kept in a standby status. at least two solid state light sources for generating at least two light beams directly or indirectly, with the at least two light beams having different colors and being output alternately, the at least two solid state light sources comprising a first solid state light source for generating an excitation light which is converted to a converted light; a second solid state light source for generating a third primary color light which is combined with the converted light into a combined light; a wavelength conversion device for converting the excitation light to the converted light; a first color wheel disposed to receive the incident converted light, the first color wheel comprising 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 in a path of the converted light, so that the converted light is filtered by the first segment to generate a first primary color light and is filtered by the second segment to generate a second primary color light; a light combining device combining the converted light and the third primary color light into the combined light to illuminate the first color wheel, wherein the first color wheel further includes a third segment, the first, second and third segments are alternatingly disposed in a path of the combined light, and wherein the third primary color light pass through the third segment; a sync signal generator for generating a sync signal; and a controller for supplying a drive power in pulse manner to each of the at least two solid state light sources based on the sync signal, wherein during at least one sub-period, one of the at least two solid state light sources is in working status and another one of the at least two solid state light sources is kept in a standby status.