For an example method of reducing diffraction artifacts in a displayed image from a digital image projection system, a digital controller is coupled to a spatial light modulator. The spatial light modulator includes a two dimensional array of pixels. The method includes receiving signals containing pixel image data and processing the pixel image data to determine a desired gray scale for a pixel. The desired gray scale is compared to achievable gray scales of the digital image projection system. An upper bounding achievable gray scale is determined, and a lower bounding achievable gray scale is determined. Also, a dithering percentage for the desired gray scale is determined. The method chooses one of the upper bounding achievable gray scale and the lower bounding achievable gray scale. Also, a modified lower bounding gray scale is chosen to reduce the dithering percentage.

Phosphor elements comprising phosphors in a host material having a phosphorescence-emitting surface with surface nanostructures are disclosed. Phosphor wheels having such phosphor elements, methods of making such phosphor elements, and methods of using such phosphor elements are also disclosed.

An image projector includes: a light source to emit light; an image forming element irradiated with the light from the light source and to form an image for projection onto a projection surface; a first controller activated when the image projector is in a waiting state; and a second controller that is not activated when the image projector is in the waiting state. In response to detection of an execution request for executing the image projector in the waiting state at the first controller, the first controller sets a power supply circuit with an initial voltage to start supplying power to the light source, and when the light source is lighted at the initial voltage, activates the second controller.

A projection capture system includes a camera to capture images of objects in a capture space, and a projector to illuminate the objects in the capture space and to project images captured by the camera into a display space. The projector includes a flash mode for providing white light for illuminating the objects in the capture space. The system includes a controller to adjust drive settings to LEDs of the projector to achieve a predetermined white point during the flash mode.

The present disclosure provides a display device and a control method thereof. The control method of the display device comprises: obtaining, based on the first light output ratio and the second light output ratio, a first luminous flux set composed of values of luminous fluxes output by a combination path at a current bit depth, and a second luminous flux set composed of values of luminous fluxes output by the combination path at a target bit depth respectively; obtaining, based on the first luminous flux set and the second luminous flux set, a value of a luminous flux to be expanded to achieve the target bit depth at the current bit depth; and adjusting a mapping relationship between the value of each luminous flux to be expanded and a value of a maximum luminous flux in the first luminous flux set corresponding to the current bit depth based on a display bit depth of the display device.

An image input/output apparatus and method includes a light source in optical communication with a spatial radiation modulator for projecting an output image and an image sensor for capturing an input image along a shared input/output path. In a described embodiment, the display of an output image and the capture of an input image is effected using a common spatial radiation modulator (SRM) in the form of a deformable mirror device (DMD).

A light source device includes a solid light source, a transmissive fluorescent plate having a phosphor that is excited by excitation light for emitting fluorescent light in a traveling direction of the excitation light, and a color filter plate that cuts a part of a wavelength region of light supplied from the fluorescent plate for trimming the light into desirable color light. The light source device further includes a first reflective film disposed on a light path extending from the fluorescent plate to the color filter plate for reflecting at least a part of the excitation light.

A light source unit includes an excitation light source, a luminescent material plate which receives excitation light emitted from the excitation light source to emit luminescent light, a drive module which moves the luminescent material plate in an in-plane direction of a surface of the luminescent material plate, and a drive control module which controls the drive module to move the luminescent material plate on a predetermined cycle.

A stereoscopic image projection device and stereoscopic display glasses include a light source system for sequentially generating a first broad spectrum light and a second broad spectrum light; a light splitter for splitting the first broad spectrum light into a first wavelength light and a second wavelength light, each having different wavelengths, and splitting the second broad spectrum light into a third wavelength light and a fourth wavelength light, each having different wavelengths; and a controller for simultaneously controlling the first wavelength light to display a corresponding color in a left-eye image and the second wavelength light to display a corresponding color in a right-eye image, and simultaneously controlling the third wavelength light to display a corresponding color in the left-eye image and the fourth wavelength light to display a corresponding color in the right-eye image. At the same time, the left eye of a viewer can see the first wavelength light or the third wavelength light, and the right eye thereof can see the second wavelength light or the fourth wavelength light, such that the left and right eyes of the viewer simultaneously receive light rays, thus relieving fatigue to the eyes.

Provided include a beam modulation apparatus for modulating an input light field and a projection system containing the apparatus. The input light field has a first light field and a second light field, having a difference of 90° in their polarization states. The apparatus includes a PBS prism, a first LCOS panel and a second LCOS panel. The first and the second LCOS panel are respectively over a side surface of the PBS prism opposing to an optical incident surface and an optical exit surface. Each LCOS panel comprises a plurality of pixels over a reflective surface thereof, with each pixel controllably switched on or off such that a polarity state of a light beam reflected by a portion of the reflective surface corresponding thereto is changed or remains unchanged. This beam modulation apparatus can be applied in a projection system, such as a laser TV projection system.