Abstract: A LED illumination device for stage lighting includes LED arrays (110) packaged on a heat dissipating substrate and including a plurality of LED chips (111), a light combining device (200) for combining the light emitted by respective LED arrays (110), and a focusing lens (400) for focusing the combined light to a light output port. The illumination device further includes a fly-eye lens pair (300) disposed between the light combining device (200) and the focusing lens (400). The fly-eye lens pair (300) comprises two fly-eye lenses, each being formed of a plurality of lens units (310) tightly connected together and having the same lens surface curvature. A method for improving color uniformity of the device is also provided.

Abstract: A light source device includes a light emitting element and a wavelength conversion device. The wavelength conversion device includes a stationary member, a moveable carrier made of a transparent material carrying one or more wavelength conversion materials and moveable relative to the stationary member, and a stationary first filter. The first filter is fixed on the stationary member and disposed adjacent the moveable carrier. The excitation light from the light emitting element passes through the first filter and illuminates the wavelength conversion materials on the moveable carrier. The wavelength conversion materials convert the excitation light into converted light as the output of the light source device. The size of the first filter is smaller than the size of the moveable carrier and smaller than a carrying area of the moveable carrier that carries the wavelength conversion material. A wavelength conversion method using the wavelength conversion device is also described.

Abstract: A backlight source and a thinning method for the same are provided. The backlight source includes: a solid state light source array having a plurality of solid state light sources distributed on the base, a light transmitting unit arranged above the solid state light source array, and a plurality of light adjusting units arranged between the solid state light source array and the light transmitting unit. The plurality of the light adjusting units is arranged above the plurality of solid state light sources to reflect the shallow angle incident light from the solid state light source, thus changes the light intensity distribution of the output light through the light transmitting unit from the solid state light sources from Lambertian distribution to main sides emission.

Abstract: An illumination system includes LED arrays (1, 2, 3) which are packaged on a heat dissipation plate and consist of several LED chips, an optical combining device (4) which can combine the light emitted by respective LED chips to one beam, a focusing lens (5) which can focus the light emitted by the optical combination device to a light-emitting window (11), a transmission type wavelength converter (7) and a control processing device. When white light is provided, the control processing device controls the LED chips with predetermined wavelengths to emit light and the transmission type wavelength converter is positioned into the light path to generate excited light.

Abstract: A LED illumination device for stage lighting includes LED arrays (110) packaged on a heat dissipating substrate and including a plurality of LED chips (111), a light combining device (200) for combining the light emitted by respective LED arrays (110), and a focusing lens (400) for focusing the combined light to a light output port. The illumination device further includes a fly-eye lens pair (300) disposed between the light combining device (200) and the focusing lens (400). The fly-eye lens pair (300) comprises two fly-eye lenses, each being formed of a plurality of lens units (310) tightly connected together and having the same lens surface curvature. A method for improving color uniformity of the device is also provided.

Abstract: An illumination system for stage lighting and a method for providing high-brightness white light are provided. The illumination system for stage lighting includes LED arrays (1, 2, 3) which are packaged on a heat dissipation plate and consist of several LED chips, an optical combining device (4) which can combine the light emitted by respective LED chips to one beam, a focusing lens (5) which can focus the light emitted by the optical combination device to a light-emitting window (11), a transmission type wavelength converter (7) and a control processing device. When white light is provided, the control processing device controls the LED chips with predetermined wavelengths to emit light and the transmission type wavelength converter is cut into the light path to generate excited light.

Abstract: An illumination device for stage lighting with high light-combining efficiency includes at least two LED arrays (1); lens arrays (2) corresponding to the LED arrays (1); a color combining device (3) for splitting light; and a focusing lens (4). Each LED chip in the same LED array (1) has the same color.