Abstract: This disclosure provides systems, methods and apparatus for light-guiding layers including light-turning features with multiple reflective surfaces oriented at different angles to the light-guiding layer. In one aspect, the multiple reflective surfaces may be located on each individual light-turning feature, while in another aspect, the multiple reflective surfaces may be located on separate light-turning features. The use of multiple reflective surfaces oriented at different angles can improve the efficiency and appearance of a frontlight system using such a light-guiding layer.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes an array of light modulators. Each light modulator is switchable between an open position that permits transmittance of light from the lighting system through a respective aperture and a shut position that blocks light transmission through the respective aperture. The processor switches the light modulators in accordance with a first modulation scheme to render an image and in accordance with a second modulation scheme to selectively pass object illuminating light through at least one of the respective apertures. A light sensor receives light resulting from interaction of the object illuminating with an object and outputs a signal to the processor. The processor recognizes, from the output of the light sensor, a characteristic of the object.

Abstract: This disclosure provides systems, methods and apparatus for illumination, such as for illuminating displays, including reflective displays. An illumination device may include a light-extracting, diffusive holographic medium. The holographic medium may be a holographic film and may be disposed on the surface of a light guide, and includes a hologram that both extracts light out of the light guide and diffuses this extracted light for propagation towards the display elements of the display. The hologram can extract light by redirecting light, which is propagating within the light guide, so that the light propagates out of the light. The diffusion occurs upon the light being redirected, as the hologram redirects the light towards the light guide in a controlled range of angles.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes an array of light modulators. Each light modulator is switchable between an open position that permits transmittance of light from the lighting system through a respective aperture and a shut position that blocks light transmission through the respective aperture. The processor switches the light modulators in accordance with a first modulation scheme to render an image and in accordance with a second modulation scheme to selectively pass object illuminating light through at least one of the respective apertures. A light sensor receives light resulting from interaction of the object illuminating with an object and outputs a signal to the processor. The processor recognizes, from the output of the light sensor, a characteristic of the object.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes an array of light modulators. Each light modulator is switchable between an open position that permits transmittance of light from the lighting system through a respective aperture and a shut position that blocks light transmission through the respective aperture. The processor switches the light modulators in accordance with a first modulation scheme to render an image and in accordance with a second modulation scheme to selectively pass object illuminating light through at least one of the respective apertures. A light sensor receives light resulting from interaction of the object illuminating with an object and outputs a signal to the processor. The processor recognizes, from the output of the light sensor, a characteristic of the object.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes a number of apertures, and devices for opening and shutting the apertures. A light directing arrangement includes at least one light turning feature. The display lighting system is configured to emit visible light and infrared (IR) light through at least a first opened one of the plurality of apertures. The light turning feature is configured to redirect IR light emitted through the opened aperture into at least one lobe, and to pass visible light emitted by the display lighting system through the opened aperture with substantially no redirection.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes an array of light modulators. Each light modulator is switchable between an open position that permits transmittance of light from the lighting system through a respective aperture and a shut position that blocks light transmission through the respective aperture. The processor switches the light modulators in accordance with a first modulation scheme to render an image and in accordance with a second modulation scheme to selectively pass object illuminating light through at least one of the respective apertures. A light sensor receives light resulting from interaction of the object illuminating with an object and outputs a signal to the processor. The processor recognizes, from the output of the light sensor, a characteristic of the object.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for providing a display device. In one aspect, the display device may include a light source system, a programmable hologram system, a light-turning layer and a control system. A control system may control the programmable hologram system to generate a sequence of holographic images of point light sources. The control system may control the programmable hologram system according to software stored in a non-transitory medium. By scanning a sequence of holographic images of point light sources across the light-turning layer, a frame of image data can be reproduced on the display device.

Abstract: Lasers configured for intracavity harmonic generation of second and higher order harmonic laser beam energy include mode-matching optics, such as a curved mirror, for recycling an unused portion of an intermediate harmonic laser beam energy (e.g., second harmonic laser beam energy) to improve higher order harmonic laser beam energy generation efficiency (e.g., third or higher order harmonic laser beam energy generation efficiency) without sacrificing beam quality of the higher order harmonic laser beam energy. The curved mirror may be positioned out of a resonant laser cavity of the laser. A radius of curvature and a position of the curved mirror are selected so that a beam radius and a beam divergence of the recycled second harmonic laser beam energy are essentially the same as a beam radius and a beam divergence of incoming second harmonic laser beam energy everywhere along a beam path of the incoming second harmonic laser beam.

Abstract: Lasers configured for intracavity harmonic generation of second and higher order harmonic laser beam energy include mode-matching optics, such as a curved mirror, for recycling an unused portion of an intermediate harmonic laser beam energy (e.g., second harmonic laser beam energy) to improve higher order harmonic laser beam energy generation efficiency (e.g., third or higher order harmonic laser beam energy generation efficiency) without sacrificing beam quality of the higher order harmonic laser beam energy. The curved mirror may be positioned out of a resonant laser cavity of the laser. A radius of curvature and a position of the curved mirror are selected so that a beam radius and a beam divergence of the recycled second harmonic laser beam energy are essentially the same as a beam radius and a beam divergence of incoming second harmonic laser beam energy everywhere along a beam path of the incoming second harmonic laser beam.

Abstract: This invention relates to improving the low frequency laser light conversion efficiency by implementing a focusing device to increase the power density inside a non-linear medium and a sub-resonator that resonates both a second harmonic light and a third or higher harmonic light. A wave front compensation device is designed for this invention. The wave front compensation device compensates part of the wave front distortion, which is caused by the sub-cavity when the focused fundamental laser beam passes through.

Abstract: A system is provided that simultaneously gathers three-dimensional and two-dimensional data for use in inspecting objects such as chip carriers for defects. Specifically, a source laser beam is directed to an object and forms a spot at the point of impingement at a known X-Y position on the object. The laser beam is reflected at the spot and light reflected off-axially with respect to the source laser beam is detected by two position sensing detectors (PSDs). Simultaneous to detecting off-axially reflected light, retro-reflected light (i.e., the light reflected approximately co-axial with the source laser) is detected by a photo diode array.