A method of displaying an image with a display device including a plurality of display pixels includes receiving image data for the image, the image data including individual pixels of the image; buffering the image data and creating a frame of the image, the frame of the image including a plurality of columns and a plurality of rows of the pixels of the image; defining a first sub-frame and at least a second sub-frame for the frame of the image, image data of the second sub-frame being offset from image data of the first sub-frame by an offset distance of at least one pixel; and displaying the first sub-frame with a first plurality of the display pixels and displaying the second sub-frame with a second plurality of the display pixels offset from the first plurality of the display pixels by the offset distance.

Image display system and method

A semiconductor light emitting device includes a planar light emitting layer with a wurtzite crystal structure having a axis roughly parallel to the plane of the layer, referred to as an in-plane light emitting layer. The in-plane light emitting layer may include, for example, a {11{overscore (2)}0} or {10{overscore (1)}0} InGaN light emitting layer. In some embodiments, the in-plane light emitting layer has a thickness greater than 50 Å.

Semiconductor light emitting devices including in-plane light emitting layers

A light emitting device includes a light emitting diode (LED), a concentrator element, such as a compound parabolic concentrator, and a wavelength converting material, such as a phosphor. The concentrator element receives light from the LED and emits the light from an exit surface, which is smaller than the entrance surface. The wavelength converting material is, e.g., disposed over the exit surface. The radiance of the light emitting diode is preserved or increased despite the isotropic re-emitted light by the wavelength converting material. In one embodiment, the polarized light from a polarized LED is provided to a polarized optical system, such as a microdisplay. In another embodiment, the orthogonally polarized light from two polarized LEDs is combined, e.g., via a polarizing beamsplitter, and is provided to non-polarized optical system, such as a microdisplay. If desired, a concentrator element may be disposed between the beamsplitter and the microdisplay.

Optical system for light-emitting diodes

The invention provides a compact, thin, and lightweight lighting system and projector A lighting system included in a projector according to the present invention is provided with an LED array having LEDs and a reflective plate at the rear side of the LEDs in the light emitting direction, retardation films, a taper rod lens array, a rod lens array, and a reflective polarizing plate

Lighting system and projector

A micro-projector comprises an LED layer, a light pipe coupled to the LED, a LCOS panel, a projection lens, a PBS, an aperture layer coupled to the output end of the light pipe which has a transmissive opening for transmitting a portion of the light output and a reflective surface for reflecting the remaining portion of the light output toward the input end of the light pipe. Thus, the remaining portion of the light output is recycled back to the LED to increase the brightness of the light output of the LED. The micro- projector also comprises a reflective polarizer disposed between the light pipe and the aperture layer for transmitting the light output of a predetermined polarization and reflecting other polarization of the light output, thereby recycling unused polarization of the light output back to the LED to increase the brightness of the light output of the LED.

Light multiplexer and recycler, and micro-projector incorporating the same

A projection display system includes a light source emitting a randomly polarized light and a polarization recapture system including a tunnel integrator and a transmitting/reflecting polarizer coupled to the output end of the tunnel integrator. The input end of the tunnel integrator includes an input aperture and a reflective inside surface coated with a quarter wave retarder. In operation, the randomly polarized light enters the tunnel integrator through the input aperture. The polarization recapture system transmits light having a first polarization as polarized light output and recycles light having a second polarization orthogonal to the first polarization. The light having the second polarization is reflected by the transmitting/reflecting polarizer back into the tunnel integrator. The polarization recapture system recycles the light having the second polarization by reflecting and reorienting the light having the second polarization to light of the first polarization.

Kurt R. Munson

Papers

Polarization recapture system for liquid crystal-based data projectors