Abstract: A visible light communication (VLC) transceiver and a VLC system are provided. The VLC transceiver includes a substrate, a lens module and a plurality of channel units. The channel units are disposed on the substrate in an array to provide different bidirectional communication channels. Wherein, each of the channel units respectively includes at least a visible light emitter and at least a visible light receiver. The channel units can enhance communication bandwidth by using modulation technology such as spatial multiplexing or time multiplexing. The lens module is disposed on an optical path of the channel units. The lens module actively tracks the receiving situation of the visible light receiver to improve the signal quality of high-speed multiplexing communication.

Abstract: A photography and projection apparatus including a light emitting and sensing module and a projection lens is provided. The light emitting and sensing module has a light emitting and sensing area, and includes a light emitting unit array and a light sensing unit array. The light emitting unit array includes a plurality of light emitting units arranged in an array. The light emitting units are distributed in the light emitting and sensing area. The light emitting unit array is adapted to provide an image beam. The light sensing unit array includes a plurality of light sensing units arranged in an array. The light sensing units are distributed in the light emitting and sensing area. The projection lens is disposed on a transmission path of the image beam. A light emitting and sensing module is also provided.

Abstract: A new light emitting device is disclosed, including a polarizing surface layer, a light emitting layer which emits light at a wavelength, and a light transformation layer disposed between the light emitting layer and the reflective layer, wherein the light emitting layer is disposed between the reflective layer and the polarizing surface layer, and an optical thickness between the light emitting layer and the reflective layer is less than a value of five times of a quarter of the wavelength.

Abstract: A light-emitting device comprises a substrate, at least one light-emitting structure configured to emit light beams and positioned on the substrate, and a ring-shaped photonic crystal structure positioned in the light-emitting structure. The ring-shaped photonic crystal structure includes a plurality of pillars positioned in the light-emitting structure and a plurality of ring-shaped openings surrounding the pillars. The distance between the ring-shaped openings is preferably between 0.2? and 10?, and ? represents the wavelength of the light beam.

Abstract: A transfer-bonding method for light emitting devices including following steps is provided. A plurality of light emitting devices is formed over a first substrate and is arranged in array, wherein each of the light emitting devices includes a device layer and a sacrificial pattern sandwiched between the device layer and the first substrate. A protective layer is formed over the first substrate to selectively cover parts of the light emitting devices, and other parts of the light emitting devices are uncovered by the protective layer. The device layers uncovered by the protective layer are bonded with a second substrate. The sacrificial patterns uncovered by the protective layer are removed, so that parts of the device layers uncovered by the protective layer are separated from the first substrate and are transfer-bonded to the second substrate.

Abstract: A light emitting unit array including a plurality of micro-light emitting diodes (?-LEDs) is provided. The micro-light emitting diodes are arranged in an array on a substrate, and each of the micro-light emitting diodes includes a reflection layer, a light emitting structure, and a light collimation structure. The light emitting structure is disposed on the reflection layer, and includes a first type doped semiconductor layer, an active layer, and a second type doped semiconductor layer that are stacked sequentially. At least a portion of the first type doped semiconductor layer, the active layer, and the second type doped semiconductor layer are sandwiched between the reflection layer and the light collimation structure.

Abstract: A projection apparatus is provided. The projection apparatus includes a light-emitting unit array, an optical sensor, and a control unit. The light-emitting unit array is for emitting an image beam. The optical sensor is for detecting electromagnetic waves so as to generate a signal. The control unit is electrically coupled to the light-emitting unit array and the optical sensor for controlling emission of the light-emitting unit array according to the signal from the optical sensor.

Abstract: A light-emitting unit array includes a plurality of light-emitting units arranged and integrated monolithically in an array, and each of the light-emitting units includes a first doped type layer, a second doped type layer, a light-emission layer, and a photonic crystal structure. The light emission layer is disposed between the first doped type layer and the second doped type layer, wherein the second doped type layer has a surface facing away from the light emission layer. The photonic crystal structure is disposed on the surface of the second doped type layer.

Abstract: A new light emitting device is disclosed, including a polarizing surface layer, a light emitting layer which emits light at a wavelength, and a light transformation layer disposed between the light emitting layer and the reflective layer, wherein the light emitting layer is disposed between the reflective layer and the polarizing surface layer, and an optical thickness between the light emitting layer and the reflective layer is less than a value of five times of a quarter of the wavelength.

Abstract: A projection display chip comprises a micro light emitting array comprising a plurality of micro LEDs, a micro collimation array comprising a plurality of micro collimation devices, and a projection micro lens array comprising a plurality of micro lenses. Each micro LED has a corresponding driving circuit device. The plurality of micro lenses has different optical axes to enlarge projected images.

Abstract: A new light emitting device is disclosed. The device includes a reflector, a surface layer, and a light emitting layer located there-between. The light emitting layer emits light at a wavelength ?. An optical thickness from the light emitting layer to the reflector is approximately m*?/4, where m is a positive integer. Furthermore, the said device may, in addition, include an optical transform layer adjoining to the light emitting layer. Thus, the light emitted by the device can be not only collimated but also polarized.

Abstract: A light-emitting device comprises a substrate, at least one light-emitting structure configured to emit light beams and positioned on the substrate, and a ring-shaped photonic crystal structure positioned in the light-emitting structure. The ring-shaped photonic crystal structure includes a plurality of pillars positioned in the light-emitting structure and a plurality of ring-shaped openings surrounding the pillars. The distance between the ring-shaped openings is preferably between 0.2? and 10?, and ? represents the wavelength of the light beam.

Abstract: The invention relates to a micro-structured fiber comprising a core region and a cladding region. The cladding region has a plurality of air holes regularly arranged on a plurality of rings, wherein the innermost ring of the fiber defines the core region. The cladding region comprises an inner circumference portion and an outer circumference portion; the inner circumference portion comprises at least one ring, the outer circumference portion comprises at least one ring, wherein the diameter of the air hole on the outer circumference portion is larger than that of the air hole on the inner circumference portion. As a result, the micro-structured fiber of the present invention has the advantages of broader band of nearly zero dispersion, less confinement loss, being easier to design due to less geometrical parameters needed to be optimized, and being easier to fabricate.

Abstract: The invention relates to a micro-structured fiber comprising a core region and a cladding region. The cladding region has a plurality of air holes regularly arranged on a plurality of rings, wherein the innermost ring of the fiber defines the core region. The cladding region comprises an inner circumference portion and an outer circumference portion; the inner circumference portion comprises at least one ring, the outer circumference portion comprises at least one ring, wherein the diameter of the air hole on the outer circumference portion is larger than that of the air hole on the inner circumference portion. As a result, the micro-structured fiber of the present invention has the advantages of broader band of nearly zero dispersion, less confinement loss, being easier to design due to less geometrical parameters needed to be optimized, and being easier to fabricate.