Abstract: A projection display having an optical light guide for a see-though display system using holographic optical element or diffractive optical element as in-coupling optics and combined with Fresnel mirrors as out-coupling optics is disclosed. A display using this light guide enables a wide angle (e.g., over 90 degrees field of view), high resolution, and a large eye-box with a compact size.

Abstract: A compact light source for a projection display is disclosed enabling eye-glass display using a Fresnel mirror reflecting light without a distance as conventional prism type reflector.

Abstract: A Micro-Electro-Mechanical Systems (MEMS) device includes a substrate, an electronic circuit mounted on the substrate, a movable element mounted on the substrate whose movement is controlled by application of an operating voltage by the electronic circuit, a stopper mounted on the substrate that stops the movement of the movable element through mechanical contact of the stopper with the movable element, and an auto-inspection mechanism that applies a test voltage between the movable element and the stopper and determines whether or not a leak current is present. The auto-inspection mechanism is mounted, at least in part, on the substrate. The test voltage is lower than the operating voltage.

Abstract: A projection display having an optical waveguide for a see-though display system using Fresnel mirrors is disclosed. A display using this waveguide enables high resolution, free from chroma aberration, wide viewing angle, large eye-box and very compact size.

Abstract: An image display system includes an array of pixel elements, column drivers, row drivers, a look up table memory, and a controller. Input video data including gradation information of an input image is received. According to rules of a look up table, the input video data is assigned to multiple groups, binary signals for respective groups are generated using the respective input video data assigned to each group, and an order of the binary signals within at least some groups is rearranged to form respective binary control signals without conflicting state changes. The controller transmits the binary control signals to the column drivers and transmits a select signal that selects the row drivers. Alternatively, the controller transmits the binary control signals to the row drivers and transmits a select signal that selects the column drivers. The select and binary control signals are in synchronization with a clock signal.

Abstract: A compact integrator of light beams is disclosed using a diffractive optical element to integrate multiple beams into a single beam regardless of wavelength or polarization.

Abstract: A seamless large screen image display having multiple tiled projection screens is disclosed. The screens can have a decorative pattern as well as black surface. Images can be presented without noticing the decorative patterns.

Abstract: A see-through image display system having a DOE often has undesirable light or so called ghost images due to the quantization of saw tooth shape of DOE surface. This invention provides ways to eliminate ghost images.

Abstract: An image display system includes an array of pixel elements, column drivers, row drivers, a look up table memory, and a controller. Input video data including gradation information of an input image is received. According to rules of a look up table, the input video data is assigned to multiple groups, binary signals for respective groups are generated using the respective input video data assigned to each group, and an order of the binary signals within at least some groups is rearranged to form respective binary control signals without conflicting state changes. The controller transmits the binary control signals to the column drivers and transmits a select signal that selects the row drivers. Alternatively, the controller transmits the binary control signals to the row drivers and transmits a select signal that selects the column drivers. The select and binary control signals are in synchronization with a clock signal.

Abstract: A Micro-Electro-Mechanical Systems (MEMS) device includes a substrate, an electronic circuit on the substrate, an electrode electrically connected to the electronic circuit, a movable element that is controlled by applying a voltage between the electrode and the movable element, an insulating layer between the electrode and the electronic circuit, and an etch stop layer. The insulating layer has a via electrically connecting the electrode and the electronic circuit, and the etch stop layer is made of at least one of Aluminum nitride or Aluminum oxide. The etch stop layer may cover the electrode and the electronic circuit, or the electrode may be mounted on the etch stop layer, electrically connected to the electronic circuit through the etch stop layer by the via.

Abstract: A micro-electro-mechanical systems device includes a substrate, each of an electronic circuit, an etch stop layer, and a hinge base mounted on the substrate, and an electrode connected to the circuit. A hinge is mounted on the base and is made of a doped semiconductor. The hinge includes a vertical support that extends vertically from the base, and a horizontally-extending hinge tab contacts the vertical support. The device also includes a movable mirror and a mirror via that couples the mirror to the hinge tab. The mirror is electrostatically attracted to the electrode responsive to application of a voltage between the electrode and the mirror, and movement of the mirror changes a relative position between the hinge tab and the vertical support. A stopper is mounted on the substrate that mechanically stops the movement of the mirror before the mirror contacts the electrode or etch stop layer.

Abstract: A Micro-Electro-Mechanical Systems (MEMS) device includes a substrate, an electronic circuit mounted on the substrate, a movable element mounted on the substrate whose movement is controlled by application of an operating voltage by the electronic circuit, a stopper mounted on the substrate that stops the movement of the movable element through mechanical contact of the stopper with the movable element, and an auto-inspection mechanism that applies a test voltage between the movable element and the stopper and determines whether or not a leak current is present. The auto-inspection mechanism is mounted, at least in part, on the substrate. The test voltage is lower than the operating voltage.

Abstract: A package encapsulating electronic components of one or more Micro-Electro-Mechanical Systems (MEMS) devices has hermetic seal that enables the use of a frame with rough surface. That is, the frame surrounds the components and is affixed to a surface of the substrate with a frame adhering layer. A cover is affixed to the frame with a cover adhering layer. Each of the frame adhering layer and the cover adhering layer comprises a solder layer between metallic adhesion layers. The solder layer comprises reflowed solder balls. The package enables direct contact of a substrate with a heat sink.

Abstract: A see-through image display system having a laser-beam-scanner has a very small eyebox when a laser beam is directly projected into eye. This invention provides a solution to increase the size of eyebox using a free-form-mirror to create a real image with high NA without exit-pupil-expander.

Abstract: A see-through image display system having an Exit-Pupil-Expander (EPE) to enlarge the eyebox of display is disclosed. The EPE uses a hologram functioning as a micro-lens-array as well as collimation lens.

Abstract: A projection display having an optical light guide for a see-though display system using holographic optical element or diffractive optical element as in-coupling optics and combined with Fresnel mirrors as out-coupling optics is disclosed. A display using this light guide enables wide angle (e.g., over 90 degrees FOV), high resolution, and large eye-box with compact size.

Abstract: A see-through image display system having an Exit-Pupil-Expander (EPE) to enlarge the eyebox of display is disclosed. The EPE uses a hologram functioning as a micro-lens-array as well as collimation lens.

Abstract: A see-through image display system having a laser-beam-scanner has a very small eyebox when a laser beam is directly projected into eye. This invention provides a solution to increase the size of eyebox using a free-form-mirror to create a real image with high NA without exit-pupil-expander.

Abstract: A compact light source for a projection display is disclosed enabling eye-glass display using a Fresnel mirror reflecting light without a distance as conventional prism type reflector.

Abstract: A deflector using Fresnel prism for short throw projector is disclosed. For a compact display such as eye-glass type display requiring short throw projection lens can be made substantially shorter and simpler with a transparent Fresnel prism.