Abstract: Exemplary subpixel structures include a directional light-emitting diode structure characterized by a full-width-half-maximum (FWHM) of emitted light having a divergence angle of less than or about 10°. The subpixel structure further includes a lens positioned a first distance from the light-emitting diode structure, where the lens is shaped to focus the emitted light from the light-emitting diode structure. The subpixel structure still further includes a patterned light absorption barrier positioned a second distance from the lens. The patterned light absorption barrier defines an opening in the barrier, and the focal point of the light focused by the lens is positioned within the opening. The subpixels structures may be incorporated into a pixel structure, and pixel structures may be incorporated into a display that is free of a polarizer layer.

Abstract: The present disclosure is generally related to 3D imaging capable OLED displays. A light field display comprises an array of 3D light field pixels, each of which comprises an array of corrugated OLED pixels, a metasurface layer disposed adjacent to the array of 3D light field pixels, and a plurality of median layers disposed between the metasurface layer and the corrugated OLED pixels. Each of the corrugated OLED pixels comprises primary or non-primary color subpixels, and produces a different view of an image through the median layers to the metasurface to form a 3D image. The corrugated OLED pixels combined with a cavity effect reduce a divergence of emitted light to enable effective beam direction manipulation by the metasurface. The metasurface having a higher refractive index and a smaller filling factor enables the deflection and direction of the emitted light from the corrugated OLED pixels to be well controlled.

Abstract: When opening a document, the character codes of all characters in the document are uploaded to a font server, then all possible glyphs corresponding to the uploaded character codes of characters tagged with a font are selected from a font file which stores a plurality of glyphs of the font to form a glyph subset. And the glyph subset is then downloaded.

Abstract: A special encoded string is generated according to character codes and attributes and/or colors of a plurality of characters in an original string. An alternate encoded string is generated according to the special encoded string. A layout string is generated by laying out a plurality of characters in the alternate encoded string. Then glyphs having attributes and/or colors of a plurality of characters in the layout string are rendered, and the glyphs having the attributes and/or the colors of the plurality characters of the layout string are shown on a display.