Light projection systems and methods may comprise combining light from two or more projectors. Each projector may be controlled so that the combined light output of the projectors matches a target for the projected light. In some embodiments optimization is performed to generate image data and control signals for each of the projectors. Embodiments may be applied in image projecting applications, lighting applications, and 3D stereoscopic imaging.

A light source apparatus includes a first light source configured to emit first color light, a second light source configured to emit second color light having a different wavelength from that of the first color light, a wavelength conversion element configured to convert the first color light into third color light having a wavelength different from that of the first color light and to emit the third color light, and to emit the second color light as it is, and an optical system including a light guide surface configured to guide the first color light from the first light source and the second color light from the second light source to the wavelength conversion element, and the optical system being configured to emit combined light of the second color light and the third color light from the wavelength conversion element.

A light source lighting device includes: a laser light source unit; a converging lens that converges a plurality of light beams emitted from the laser light source unit; a diffuser plate that diffuses a plurality of light beams converged by the converging lens; and a second collimating lens that collimates a light beam diffused by the diffuser plate. The converging lens has an aspherical surface, the second collimating lens has a spherical surface, the aspherical surface of the converging lens has an aspherical surface coefficient that is set to cancel a positive spherical aberration of the second collimating lens. A luminous flux density in a proximity of an optical axis is lower than a luminous flux density in a peripheral part away from the optical axis, the optical axis being an axis of a light beam emitted from the second collimating lens.

A laser projection apparatus includes a laser source assembly, an optical engine and a projection lens. The laser source assembly includes a laser device and a combining lens group. The laser device includes a first laser-exit region emitting laser beams of first color, a second laser-exit region emitting laser beams of second color, and a third laser-exit region emitting laser beams of third color. The combining lens group includes a plurality of combining lenses and a beam spot adjustment structure. The beam spot adjustment structure is disposed in beam paths of the laser beams of first color and the laser beams of second color before being combined with the laser beams of third color, and the beam spot adjustment structure is configured to increase a divergence angle of at least one of the laser beams of first color or the laser beams of second color.

A projection system includes a light source unit, a spatial light modulation unit, and a projection optical system. Light source unit includes an optical fiber, a first light source part, and a second light source part. Optical fiber includes a light incident portion, a light emerging portion and a wavelength-converting portion. Wavelength-converting portion is disposed between light incident portion and light emerging portion. Wavelength-converting portion includes wavelength-converting elements. Wavelength-converting elements are able to be excited by excitation light to produce spontaneous emission of light having a longer wavelength than excitation light, and also excited by amplified spontaneous emission of light. First light source part makes excitation light incident on light incident portion. Second light source part makes seed light incident on light incident portion. Seed light causes wavelength-converting elements excited by excitation light or amplified spontaneous emission of light to produce stimulated emission of light.

A light source device includes a light source module, a plurality of heat receiving plates coupled to the light source module, and a cooling plate coupled to the plurality of heat receiving plates, cooling liquid flowing on the inside of the cooling plate. The cooling plate includes an upstream-side flowing section, a downstream-side flowing section, and a plurality of heat transfer sections provided in at least one of the upstream-side flowing section and the downstream-side flowing section and aligned in a second direction. The plurality of heat transfer sections include a plurality of fins extending in the second direction and a plurality of channels provided among the plurality of fins. The plurality of heat receiving plates are disposed along the second direction. The plurality of heat transfer sections are separated from one another in positions among the plurality of heat receiving plates in the second direction.

A projection display system includes a light source assembly, a wavelength adjusting assembly, and a modulation assembly. The light source assembly is configured to emit projected light. The wavelength adjusting assembly is disposed on an optical path of the projected light for adjusting spectrum of the projected light, and a ratio of luminous efficacy of adjusted projected light to luminous efficacy of monochromatic light corresponding to a dominant wavelength of the projected light is greater than a preset ratio, and color gamut of the adjusted projected light satisfies a preset color gamut coverage. The modulation assembly is disposed on a light exiting path of the wavelength adjusting assembly and configured to modulate light emitted by the wavelength adjusting assembly and output corresponding image light to form projection image.

An illumination system including a light source, a wavelength conversion device and a first light-uniforming element is provided. The light source emits an excitation beam. A light wavelength conversion region and a transmission region of the wavelength conversion device sequentially insert on the transmission path of the excitation beam at different time periods. When the light wavelength conversion region inserts on the transmission path of the excitation beam, a conversion beam is provided. When the transmission region inserts on the transmission path of the excitation beam, a non-conversion excitation beam is provided. The non-conversion excitation beam and the conversion beam penetrate the first light-uniforming element to form an illumination beam. The conversion beam is reflected for X time(s) and the non-conversion excitation beam is reflected for Y time(s) on the transmission path between the wavelength conversion device and the first light-uniforming element. A projection apparatus is also provided.

A circuit apparatus is used in a laser projector that projects an image onto a projection surface by using laser beams having different wavelengths or a plurality of colors. The circuit apparatus includes a distortion correction circuit and an output circuit. The distortion correction circuit performs distortion correction on a color basis on display image data corresponding to the plurality of colors. The output circuit outputs the display image data as a result of the distortion correction. The distortion correction circuit performs the distortion correction on a color basis by using warp parameters different from one another among the plurality of colors.

Projection displays include a highlight projector and a main projector. Highlights projected by the highlight projector boost luminance in highlight areas of a base image projected by the main projector. Various highlight projectors including steerable beams, holographic projectors and spatial light modulators are described.