The present invention relates to image projection and provides a method and system for performing color calibration of light sources and correction towards a color target, for example a whitepoint target. The calibration and correction considers the ambient temperature and that the projector output has an arbitrary dimming level. The correction can be made automatic and can be performed by an operator in the field by pressing a button.

A projection device is provided. An excitation light source of the projection device emits a first light beam incident to a light wavelength conversion wheel along a first direction. The light wavelength conversion wheel outputs the first light beam at a first timing, and converts the first light beam into a second light beam to be outputted at a second timing. The second light beam exits the light wavelength conversion wheel along a second direction. The first and second light beams sequentially penetrate a color filter wheel and a light homogenizing element, so that an illumination system outputs an illumination beam. The illumination beam is incident to a light valve along a third direction to be converted into an image beam. The image beam exits the light valve along a fourth direction. The first to fourth directions are different from each other and are located on a same plane.

A laser mixing module includes first, second, and third laser sets and a condensing lens. The first laser set includes first and second laser sources and a first polarization beam splitter reflecting a polarization light of the first laser source and allowing a polarization light of the second laser source to pass for forming a first laser beam. The second laser set includes third and fourth laser sources and a second polarization beam splitter reflecting a polarization light of the third laser source and allowing a polarization light of the fourth laser source to pass therethrough for forming a second laser beam. The third laser set includes a fifth laser source and first and second dichroic mirrors respectively reflecting the first and second laser beams and allowing a light of the fifth laser source to pass for forming a third laser beam. The condensing lens condenses the third laser beam.

The invention provides a full color projection system (1000) comprising a lighting system (100) configured to provide first light (111) including blue light, second light (121) including one or more of green and yellow light, third light (131) including red light, wherein the first light (111), the second light (121), and the third light (131) include light having a wavelength of 430 nm or larger; a further light source (140) configured to provide further light source light (141) including one or more of UV light and short wavelength blue light having a wavelength of 420 nm or smaller, wherein the first light (111), second light (121), third light (131) and the further light source light (141) have mutually differing spectral power distributions; a spatial light modulator system (200) configured to receive the first light (111), the second light (121), the third light (131), and the further light source light (141), wherein the spatial light modulator system (200) is configured to provide a plurality of pixels (210) for providing projection system light (1001) with one or more of the first light (111), the second light (121), and the third light (131), and in one or more control modes the further light source light (141); and a control system (300) configured to control the lighting system (100), the further light source (140), and the spatial light modulator system (200), wherein during operation one or more pixels (210) are temporarily configured to provide white projection system light (1001), and wherein the projection system (1000) is configured to provide also the further light source light (141) via one or more of those one or more pixels (210).

An illuminator of the present disclosure includes a light source unit that emits at least one colored light, and emits, for each of the pieces of colored light, light having a plurality of peak wavelengths different from each other, and a diffraction device that includes a plurality of divided areas, and displays, in each of the divided areas, a diffraction pattern that is optimized at a corresponding peak wavelength out of each of the peak wavelengths. The plurality of divided areas allows the light of the plurality of peak wavelengths to enter the plurality of divided areas individually for each of the pieces of colored light.

In described examples, a first TIR or RTIR element is arranged to introduce at least red light to a first spatial light modulator for modulation thereof, and a second TIR or RTIR element is arranged to introduce at least green light to a second spatial light modulator for modulation thereof. At least one of the first and second TIR or RTIR elements is arranged to introduce blue light to at least one of the first and second spatial light modulators, respectively, for modulation thereof: time-sequentially apart from the first spatial light modulator's modulation of the introduced red light, to an extent the blue light is so introduced to the first spatial light modulator; and time-sequentially apart from the second spatial light modulator's modulation of the introduced green light, to an extent the blue light is so introduced to the second spatial light modulator.

In described examples, a first TIR or RTIR element is arranged to introduce at least red light to a first spatial light modulator for modulation thereof, and a second TIR or RTIR element is arranged to introduce at least green light to a second spatial light modulator for modulation thereof. At least one of the first and second TIR or RTIR elements is arranged to introduce blue light to at least one of the first and second spatial light modulators, respectively, for modulation thereof: time-sequentially apart from the first spatial light modulator's modulation of the introduced red light, to an extent the blue light is so introduced to the first spatial light modulator; and time-sequentially apart from the second spatial light modulator's modulation of the introduced green light, to an extent the blue light is so introduced to the second spatial light modulator.

A display apparatus comprises a light source device, an image data processing module, a light modulating device and an image synthesizing device. The light source device is configured to emit first light and second light. The image data processing module is configured to receive original image data of an image to be displayed, wherein the original image data of the image to be displayed is based on image data within a second color gamut range and comprises original control signal values of m colors of each pixel; the second color gamut range covers a first color gamut range and has a portion that exceeds the first color gamut range. The image data processing module is further configured to map the original control signal values of the m colors into m corrected control signal values corresponding to the first light and n corrected control signal values corresponding to the second light.

In described examples, a projector includes a light source to produce first light of a first color. The projector also includes a phosphor to selectively receive the first light and produce second light of a second color in response to the first light. The projector also includes a dichroic mirror to pass a portion of the second light to produce a third light of a third color. The dichroic mirror reflects a portion of the second light as fourth light of a fourth color.

In described examples, a projector includes a light source to produce first light of a first color. The projector also includes a phosphor to selectively receive the first light and produce second light of a second color in response to the first light. The projector also includes a dichroic mirror to pass a portion of the second light to produce a third light of a third color. The dichroic mirror reflects a portion of the second light as fourth light of a fourth color.