Abstract: The present disclosure discloses a Bluetooth communication system. A first access point apparatus of a Bluetooth access point apparatus performs periodic broadcast communication.

Abstract: An optical film includes a plurality of polymeric layers, such that a transmittance of the polymeric layers versus wavelength includes: a left band edge separating a wavelength range where the polymeric layers has a transmittance of greater than about 60% from a wavelength range where the polymeric layers has a reflectance of greater than about 80%; and a mid-wavelength corresponding to a transmittance of about 50% along the left band edge. A display system includes a light converting film having green and red emission spectra including respective green and red emission peaks with respective green and red full width at half maxima (FWHMs); and includes the optical film disposed on the light converting film. For each of the FWHMs, the mid-wavelength is less than or equal to a shortest wavelength of the FWHM or greater than the shortest wavelength by no more than about 30% of the FWHM.

Abstract: A display system includes a light source configured to emit light from a light exit surface, the emitted light having an emitted wavelength. An optical filter is disposed on the light exit surface of the light source. One or more light converting films are disposed between the optical filter and the light exit surface of the light source. The one or more light converting films are configured to receive the emitted light from the light source and convert at least portions of the received emitted light to blue, green, and red lights having respective blue, green and red wavelengths. For a substantially normally incident light and for at least an in-plane first polarization state, the optical filter reflects more than about 80% of the incident light having the emitted wavelength, and transmits greater than about 60% of the incident light for each of the blue, green and red wavelengths.

Abstract: An article (100) for a display device includes a diffraction grating film (102), a first optically clear adhesive layer (120), and a second optically clear adhesive layer (130). The diffraction grating film includes a base layer (104) and a plurality of microstructures (106) projecting from the base layer. The base layer defines a non-structured surface of the diffraction grating film and the plurality of microstructures define a structured surface of the diffraction grating film opposite to the non-structured surface. The first optically clear adhesive layer is disposed on the structured surface of the diffraction grating film. The second optically clear adhesive layer is disposed on the non-structured surface of the diffraction grating film.

Abstract: A backlight to a display panel including a plurality of discrete spaced apart light sources configured to emit light and arranged two-dimensionally on a first substrate substantially reflective at least in regions between the light sources, a reflective polarizer disposed on the plurality of discrete spaced apart light sources, a first optical diffuser disposed between the reflective polarizer and the plurality of light sources and having a plurality of positive microlenses arranged in a regular two-dimensional array, and a second optical diffuser disposed between the reflective polarizer and the plurality of light sources and having a plurality of retroreflective elements arranged in a regular two-dimensional array. The second optical diffuser is configured to receive the emitted light and retroreflect the received light for incident angles less than a predetermined threshold value and transmit at least 60% of the received light for incident angles greater than the predetermined threshold value.

Abstract: A display system includes a light source configured to emit light from a light exit surface, the emitted light having an emitted wavelength. An optical filter is disposed on the light exit surface of the light source. One or more light converting films are disposed between the optical filter and the light exit surface of the light source. The one or more light converting films are configured to receive the emitted light from the light source and convert at least portions of the received emitted light to blue, green, and red lights having respective blue, green and red wavelengths. For a substantially normally incident light and for at least an in-plane first polarization state, the optical filter reflects more than about 80% of the incident light having the emitted wavelength, and transmits greater than about 60% of the incident light for each of the blue, green and red wavelengths.

Abstract: The present disclosure provides a light-emitting diode package, including: a carrier; a light-emitting diode chip disposed over the carrier; and a fluorescent sheet covering the light-emitting diode chip, wherein the fluorescent sheet has a recess corresponding to the light-emitting diode chip, wherein the light-emitting diode chip is placed in the recess, and light-emitting surfaces of the light-emitting diode chip are covered by the fluorescent sheet. The present disclosure also provides a method for manufacturing a light-emitting diode package.

Abstract: A solid-state light-emitting module includes a transparent substrate, a light emitting diode chip, a first package sealant, a second package sealant, and a wavelength selection structure layer. The transparent substrate includes a first surface, a second surface which is opposite to the first surface, and a side face surrounding and connecting the first surface and the second surface. The light emitting diode chip is fixed on the first surface to emit light with a first wavelength. The first package sealant is disposed on the first surface to cover the light emitting diode chip. The second package sealant is disposed on the second surface and opposite to the first package sealant. The wavelength selection structure layer is disposed on the side face of the transparent substrate for selectively reflecting or transmitting the light therethrough.

Abstract: A light emitting diode package includes a lead frame, a light emitting diode chip, a wavelength conversion structure, and a filter. The light emitting diode chip is disposed on and electrically connected to the lead frame for providing a first light beam with a first wavelength. The light emitting diode chip is configured to provide a first light beam with a first wavelength. The wavelength conversion structure is disposed on the light emitting diode chip, and is configured to convert the first light beam into a second light beam with a second wavelength. The filter is disposed between the light emitting diode chip and the wavelength conversion structure. The filter allows the first light beam from the light emitting diode chip to pass therethrough to enter the wavelength conversion structure, and reflects the second light beam from the wavelength conversion structure back to the wavelength conversion structure.