Abstract: An organic light-emitting diode (OLED) device includes a substrate, a well structure on the substrate with the well structure having a recess with side walls and a floor, a lower metal layer covering the floor and side-walls of the well, an upper conductive layer on the lower metal layer covering the floor of the well and contacting the lower metal layer, the upper conductive layer having outer edges at about an intersection of the side walls and the floor, a dielectric layer formed of an oxide of the lower metal layer covering the side walls of the well without covering the upper conductive layer, a stack of OLED layers covering at least the floor of the well, the upper conductive layer providing an electrode for the stack of OLED layers, and a light extraction layer (LEL) in the well over the stack of OLED layers and the dielectric layer.

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: A light-emitting diode display including a substrate having a driving circuitry and a plurality of light emitting diode structures disposed on the substrate. Each light-emitting diode structure has a light emitting diode with a light emission zone having a planar portion, and a pigmentless light extraction layer of a UV-cured ink disposed over the light-emitting diode. The light extraction layer has a gradient in index of refraction along an axis normal to the planar portion, and the index of refraction of the light extraction layer decreases with distance from the planar portion.

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: A rotary positioning apparatus includes a fixing base, a rotation mechanism, two driving modules and a carrier. The rotation mechanism is disposed on the fixing base, the first driving module is disposed on the fixing base and coupled to the rotation mechanism to drive the rotation mechanism rotating around a first rotation axis relatively to the fixing base. The carrier has plural accommodating slots on a circular-arc surface thereof and is pivoted to the rotation mechanism through a second rotation axis passing through the curvature center of the circular-arc surface and perpendicular to the first rotation axis, on which the curvature center is located. The second driving module is disposed on the rotation mechanism and coupled to the carrier to drive the carrier rotating around the second rotation axis relatively to the rotation mechanism. An automatic pick-and-place system and an operation method using the rotary positioning apparatus are also provided.

Abstract: A rotary positioning apparatus includes a fixing base, a rotation mechanism, two driving modules and a carrier. The rotation mechanism is disposed on the fixing base, the first driving module is disposed on the fixing base and coupled to the rotation mechanism to drive the rotation mechanism rotating around a first rotation axis relatively to the fixing base. The carrier has plural accommodating slots on a circular-arc surface thereof and is pivoted to the rotation mechanism through a second rotation axis passing through the curvature center of the circular-arc surface and perpendicular to the first rotation axis, on which the curvature center is located. The second driving module is disposed on the rotation mechanism and coupled to the carrier to drive the carrier rotating around the second rotation axis relatively to the rotation mechanism. An automatic pick-and-place system and an operation method using the rotary positioning apparatus are also provided.