Abstract:
Wearable augmented reality display systems are provided. One or a plurality of emissive display elements are embedded in the bridge area of an eyeglass frame. The lenses are provided with a set of transmissive diffractive optical elements and partially reflective diffractive optical elements. The display outputs are directed toward the lens elements whereby the diffractive elements in turn direct the outputs toward the eye-boxes of the viewer.
Abstract:
Split exit pupil (or split eye-box) heads-up display (HUD) systems and methods are described. The described HUD system methods make use of a split exit pupil design method that enables a modular HUD system and allows the HUD system viewing eye-box size to be tailored while reducing the overall HUD volumetric aspects. A HUD module utilizes a high brightness small size micro-pixel imager to generate a HUD virtual image with a given viewing eye-box segment size. When integrated together into a HUD system, a multiplicity of such HUD modules displaying the same image would enable such an integrated HUD system to have an eye-box size that is substantially larger than the eye-box size of a HUD module. The resultant integrated HUD system volume is substantially volumetrically smaller than a HUD system that uses a single larger imager. Furthermore, the integrated HUD system can be comprised of a multiplicity of HUD modules to scale the eye-box size to match the intended application while maintaining a given desired overall HUD system brightness.
Abstract:
Disclosed herein are multi-layered optically active regions for semiconductor light-emitting devices (LEDs) that incorporate intermediate carrier blocking layers, the intermediate carrier blocking layers having design parameters for compositions and doping levels selected to provide efficient control over the carrier injection distribution across the active regions to achieve desired device injection characteristics. Examples of embodiments discussed herein include, among others: a multiple-quantum-well variable-color LED operating in visible optical range with full coverage of RGB gamut, a multiple-quantum-well variable-color LED operating in visible optical range with an extended color gamut beyond standard RGB gamut, a multiple-quantum-well light-white emitting LED with variable color temperature, and a multiple-quantum-well LED with uniformly populated active layers.
Abstract:
Methods for bonding semiconductor wafers requiring the transfer of electrical and optical signals between the bonded wafers and across the bonding interface by interfusing optical interconnects on one wafer with optical interconnects on a second wafer, interfusing electrical interconnects on one wafer with electrical interconnects on the second wafer, and interfusing a dielectric intermediary bonding layer on one wafer with the dielectric intermediary bonding layer on the second wafer to bond the wafers together with electrical interconnections and optical interconnections between the wafers. The methods are also applicable to the bonding of semiconductor wafers to provide a high density of electrical interconnects between wafers.
Abstract:
A spatio-temporal directional light modulator is introduced. This directional light modulator can be used to create 3D displays, ultra-high resolution 2D displays or 2D/3D switchable displays with extended viewing angle. The spatio-temporal aspects of this novel light modulator allow it to modulate the intensity, color and direction of the light it emits within an wide viewing angle. The inherently fast modulation and wide angular coverage capabilities of this directional light modulator increase the achievable viewing angle, and directional resolution making the 3D images created by the display be more realistic or alternatively the 2D images created by the display having ultra high resolution.
Abstract:
Methods for bonding semiconductor wafers requiring the transfer of electrical and optical signals between the bonded wafers and across the bonding interface. The methods for bonding of semiconductor wafers incorporate the formation of both electrical and optical interconnect vias within the wafer bonding interface to transfer electrical and optical signals between the bonded wafers. The electrical vias are formed across the bonding surface using multiplicity of metal posts each comprised of multiple layers of metal that are interfused across the bonding surface. The optical vias are formed across the bonding surface using multiplicity of optical waveguides each comprised of a dielectric material that interfuses across the bonding interface and having an index of refraction that is higher than the index of refraction of the dielectric intermediary bonding layer between the bonded wafers. The electrical and optical vias are interspersed across the bonding surface between the bonded wafers to enable uniform transfer of both electrical and optical signals between the bonded wafers.
Abstract:
Methods are described to utilize relatively low cost substrates and processing methods to achieve enhanced emissive imager pixel performance via selective epitaxial growth. An emissive imaging array is coupled with one or more patterned compound semiconductor light emitting structures grown on a second patterned and selectively grown compound semiconductor template article. The proper design and execution of the patterning and epitaxial growth steps, coupled with alignment of the epitaxial structures with the imaging array, results in enhanced performance of the emissive imager. The increased luminous flux achieved enables use of such images for high brightness display and illumination applications.
Abstract:
3D light field display methods and apparatus with improved viewing angle, depth and resolution are introduced. The methods can be used to create a high quality 3D light field display of any size from smaller than a postage stamp to larger than a three story building.
Abstract:
Disclosed herein are multi-layered optically active regions for semiconductor light-emitting devices (LEDs) that incorporate intermediate carrier blocking layers, the intermediate carrier blocking layers having design parameters for compositions and doping levels selected to provide at least one strain compensation layer and efficient control over the carrier injection distribution across the active regions to achieve desired device injection characteristics. Examples of embodiments discussed herein include, among others: a multiple-quantum-well variable-color LED operating in visible optical range with full coverage of RGB gamut, a multiple-quantum-well variable-color LED operating in visible optical range with an extended color gamut beyond standard RGB gamut, a multiple-quantum-well light-white emitting LED with variable color temperature, and a multiple-quantum-well LED with uniformly populated active layers.
Abstract:
A method and apparatus for achieving selective polarization states of emitted visible or other light in a stacked multicolor emissive display device by utilizing nonpolar, semipolar or strained c-plane crystallographic planes of semiconductor materials for light emitting structures within an electronic emissive display device.