Abstract: A color display having a monochromatic light source, an optical switch and an array of pixels formed of anisotropically emitting photoluminescent material may be combined such that large losses often associated with color filter and polarizers are avoided such that a high efficient display results. The optical switch may be a liquid crystal device that is tuned to the wavelength of the monochromatic light source. The monochromatic light source may be made from OLED material that emits in the violet, near UV or blue spectrum and may be polarized. The array of pixels may include a transmissive pixel when the backlight spectrum is the same as the color of one of the pixels.

Abstract: Lighting devices using feedback-enhanced luminescent devices are disclosed. A light emitting diode disposed between feedback elements (FE-LED) may be used as a light emitting element in the lighting devices. The light emitting element may be coupled to a light distribution element. In one aspect, the light emitting diode may be an organic light emitting diode (FE-OLED).

Abstract: A micromechanical mirror combined with a photoluminescent screen is able to efficiently use light from the light source. In such a device, the light source produces light that is directed onto the micromechanical mirror. The micromechanical mirror then selectively reflects the light onto a photoluminescent screen. The light excites the photoluminescent screen to produce the desired picture. The photoluminescent screen may include sets of pixels that convert light from the light source to provide the desired picture. Typically, each pixel set includes a red, green and blue portion although any suitable combination of colors and number of pixels may be used. Each pixel set portion converts the light received from the light source into its respective color by photoluminescence. Alternatively, the photoluminescent screen may include transparent and/or scattering portions instead of photoluminescent portions of a certain color when the light source has a spectrum which is limited to one color.

Abstract: A light emitting device may include a light emitting layer such as an organic semiconductor material, one or more feedback structures, and a coupling structure. The one or more feedback structures may cause light emitted by the light emitting layer to be fed back through it along an axis in the plane of the device, thereby promoting the stimulated emission of light in the light emitting layer. The coupling structure couples some fraction of the feedback light out of the device. The coupled light may be emitted along an axis substantially normal to the plane of the device or at predetermined angles. The coupling and feedback structures may have a corrugated structure, a continuous variation of refractive index along an axis in the device plane, a period refractive index, or any combination thereof. The coupling and feedback structures may be separate, share common portion or combined together.

Abstract: An illuminant that also functions as decorative wallpaper or as an architectural decoration is disclosed. The illuminant may include a light generation part such as an organic light emitting material, a light guide such as a tapered light guide, and a surface pattern. The light source generates the light that is guided to small opening in the surface pattern to provide illumination. The surface pattern may be formed as a decoration or subsequently processed to form the decoration.

Abstract: A method of making a solution of a polyimide from a diamine monomer and a dianhydride monomer is disclosed. A solution or slurry of one of the monomers in a solvent that boils at a temperature between about 80° C. and about 160° C. is prepared. The solution or slurry is heated to a temperature between about 80° C. and about 160° C. and the other monomer is slowly added to the solution or slurry. Polyamic acid that is formed quickly imidizes to form the polyimide.

Abstract: Apparatus and methods for manufacturing electrochromic cells. Layers of various inks are printed on substrates by high speed printing means. The electrochromic cells comprise layers of electrode, electrolyte, and counter electrode ink materials which are printed on at least one substrate. When an electrical voltage differential is introduced between the electrode and counter electrode layers, an electrochemical reaction occurs in the electrochemical cell.

Abstract: An enclosure assembly for a dry cell and a dry cell battery including such enclosure assembly wherein the enclosure assembly includes first and second layers of plastic material. The first layer of plastic material closely surrounds the dry cell and has physical characteristics sufficient to resist deterioration when contacted by exudate from the dry cell. Preferably, the first layer possesses chemical and physical barrier properties sufficient to retain cell exudate produced during discharge of the dry cell. The second layer closely surrounds the first layer and is fabricated from shrinkable plastic which encapsulates the first layer and produces a tight and chemically leak resistant seal around the dry cell.