Abstract: A display device includes: a first substrate including a first region, a second region adjacent to the first region, and a third region adjacent to the second region; a plurality of emission layers on the first substrate; a first anti-reflection layer on the plurality of emission layers, and to transmit a first colored light; a second anti-reflection layer on the plurality of emission layers, and to transmit a second colored light and a third colored light that are different from the first colored light; and a second substrate on the first anti-reflection layer and the second anti-reflection layer.

Abstract: An organic light emitting display device includes a substrate having a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel arranged in a quad type of a 2×2 matrix form, a first color filter disposed in the first sub-pixel, a second color filter disposed in the second sub-pixel, a third color filter disposed in the third sub-pixel, and a planarization layer covering the first to third color filters, wherein the planarization layer has a concave portion of a lens shape in the fourth sub-pixel, wherein the concave portion has a width greater than that of the fourth sub-pixel. Accordingly, the organic light emitting display device with improved light extraction efficiency of the fourth sub-pixel may be implemented.

Abstract: The invention relates to a phosphor for a UV emitting device, having the formula Na1+xCa1?2xPO4:PR3+x wherein 0<x<0.5.

Abstract: Provided are an optical member in which emission of stray light to the outside can be suppressed and an image display apparatus. The optical member includes: a light guide element including a light guide plate and an incidence diffraction element and an emission diffraction element that are disposed on a main surface of the light guide plate; and a polarization element that blocks transmission of light leaking to a side of the emission diffraction element opposite to an emission side, wherein the emission diffraction element is a polarization diffraction element, the polarization element is disposed on the side of the emission diffraction element opposite to the emission side, and the polarization element is disposed at a position overlapping the emission diffraction element in a plane direction of the main surface of the light guide plate.

Abstract: Systems and methods for modifying a municipal fixture to affix endpoint devices, provide a power to such devices, and managing network traffic between and among such devices, including managing upstream transmission and efficiently propagating desired state changes through the network. The systems and methods described herein generally use a plurality of mesh radio transmitters which are configured for peer-to-peer data exchange to propagate system state changes to one or more uplink gateways. The gateways may then aggregate this data and transmit it over a wide area network to a server or server farm for processing, analysis, and other use. That data may also be viewed in real time by user devices, and instructions and commands may also be relayed to the individual IoT devices in the mesh network via such user devices.

Abstract: A cadmium free quantum dot including a semiconductor nanocrystal core and a semiconductor nanocrystal shell disposed on the core, wherein the quantum dot does not include cadmium and includes indium and zinc, the quantum dot has a maximum photoluminescence peak in a red light wavelength region, a full width at half maximum (FWHM) of the maximum photoluminescence peak is less than or equal to about 40 nanometers (nm), an ultraviolet-visible (UV-Vis) absorption spectrum of the quantum dot includes a valley between about 450 nm to a center wavelength of a first absorption peak, and a valley depth (VD) defined by the following equation is greater than or equal to about 0.2, a quantum dot polymer composite including the same, and a display device including the quantum dot-polymer composite: (Absfirst?Absvalley)/Absfirst=VD.

Abstract: A display apparatus includes a substrate including a transmission area, a display area, and a first non-display area between the transmission area and the display area, a display layer including display elements and bypass lines, an encapsulation member that covers the display elements and the bypass lines, a metal layer on the encapsulation member, and including a first hole corresponding to the transmission area, and an optical functional section including a second hole corresponding to the transmission area, wherein a first perpendicular distance from a center line, which passes through a center of the transmission area and is perpendicular to an upper surface of the substrate, to an edge of the first hole may be less than a second perpendicular distance from the center line to an edge of the second hole.

Abstract: A display device includes: a display panel including a substrate having first and second opposing surfaces and a light emitting element disposed on the first surface of the substrate, the display panel having a transmission area through which light is transmitted from outside the display device; a sensor facing the surface of the substrate and configured to sense light received through the transmission area; and an anti-reflective member disposed between the sensor and the substrate and to transmit light such that reflection of applied light is reduced. The anti-reflective member overlaps the transmission area when viewed in a direction normal to the first and second surfaces of the substrate.

Abstract: Provided is an organic electroluminescent display device, including a substrate, an organic light-emitting device on the substrate, and an encapsulation layer formed on the organic light-emitting device and the substrate. The encapsulation layer includes an inorganic layer and a polymer organic layer alternatingly stacked with an intermediate layer formed of a first organic monomer between the inorganic layer and the polymer organic layer, and one surface of the intermediate layer is bonded to the inorganic layer through bonding sites on a surface of the inorganic layer and another surface of the intermediate layer is bonded to the organic layer by polymerization.

Abstract: A light guiding structure, a light source module and a display module are disclosed. The light guiding structure includes a light guiding body and at least one light guiding cavity disposed in the light guiding body. The light guiding body includes a light incident surface and a light exit surface which are disposed opposite to each other. Each light guiding cavity includes a first end close to the light incident surface of the light guiding body and a second end away from the light incident surface of the light guiding body, and the light guiding cavity extends from the first end to the second end.

Abstract: A light-emitting device includes: a base portion; a plurality of light-emitting elements disposed on an upper surface of the base portion, the plurality of light-emitting elements including: a first light-emitting element configured to emit first light from a first emitting surface, and a second light-emitting element configured to emit second light from a second emitting surface; and one or more reflective members disposed on the upper surface of the base portion and configured to reflect upward the first light and the second light. The one or more reflective members include: a first reflective surface configured to reflect the first light, a second reflective surface configured to reflect upward the first light that has been reflected at the first reflective surface, and a third reflective surface configured to reflect the second light.

Abstract: Improved ultraviolet field-emission lamps can be safely deployed close to people because they eliminate the use of toxic materials, mitigate heating issues, and emit light in a wavelength range that is safe for human exposure.

Abstract: Disclosed is a light emitting display device in which an optical compensation layer for compensating for an optical distance in each of subpixels configured to emit light with different colors is provided together with formation of a thin film transistor array so as to decrease a driving voltage value required to drive an organic stack and to improve processibility.

Abstract: A color filter unit having improved optical efficiency and color reproduction and a display apparatus including the color filter unit are provided. The display apparatus includes a first pixel, a second pixel, and a third pixel on a first substrate, the first pixel, the second pixel, and the third pixel are configured to emit light of different colors from one another, wherein each of the first pixel and the second pixel includes a display element, a light scattering layer corresponding to the display element, the light scattering layer comprising first scattering particles and first quantum dots, and a color conversion layer on the light scattering layer, the color conversion layer including second scattering particles and second quantum dots configured to convert incident light into light of a set color.

Abstract: Provided is a light absorption anisotropic layer including a dichroic substance, in which a transmittance as viewed from a front direction is high and a transmittance as viewed from an oblique direction can be lowered, a laminate, an optical film, an image display device, and a backlight module. The light absorption anisotropic layer includes a liquid crystalline compound and at least one dichroic substance, in which the dichroic substance is aligned perpendicular to the film surface, and an alignment degree of the light absorption anisotropic layer at a wavelength of 550 nm is 0.95 or more.

Abstract: Systems and methods are provided for a mechanical actuator based on a fiber optic platform. A material that is configured to be activated by light may be incorporated into an optical fiber that serves as both an actuator and a power delivery network. This platform is adaptable to different materials, types of motions, and length scales and allows for precise delivery of photons to the material.

Abstract: The present disclosure relates to a pixel arrangement structure, a display panel and a display device. The pixel arrangement structure includes: a first pixel area including a plurality of first-category pixel groups; and a second pixel area including a plurality of second-category pixel groups; wherein the first pixel area is adjacent to the second pixel area, and the first pixel area has a pixel density lower than a pixel density of the second pixel area; each of the first-category pixel groups includes a first sub-pixel of a first color, a second sub-pixel of a second color, and a third sub-pixel of a third color, the plurality of first-category pixel groups are arranged in an array, and in the first pixel area, centers of first sub-pixels of each column of the first-category pixel groups are in a same straight line.

Abstract: A light emitting electronic card includes a card body, an electronic control module, a light emitting module and a light guide module. The card body includes a panel, a base plate, a light transmissive portion, a first light shielding portion and a second light shielding portion. The electronic control module is disposed at the card body, and includes a circuit control carrier board and a non-contact type radio-frequency (RF) antenna or a contact type communication chip. The light emitting module is disposed in the card body and is electrically connected to the circuit control carrier board. The light guide module is disposed in the card body and corresponds to the light emitting module, includes a light source focusing portion corresponding to the light transmissive portion, and guides a light source of the light emitting module to the light transmissive portion by the light source focusing portion.

Abstract: A quantum dot-polymer composite including a polymer matrix; and core-shell quantum dots dispersed in the polymer matrix, wherein the core-shell quantum dots include a semiconductor nanocrystal core including indium, zinc, and phosphorus and a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, the shell including zinc, selenium, and sulfur. The core-shell quantum dots do not include cadmium, the core-shell quantum dots are configured to emit green light, the core-shell quantum dots have a mole ratio of phosphorus to indium of greater than or equal to about 0.75, and the core-shell quantum dots have a mole ratio of zinc to indium of greater than or equal to about 35, and a method of producing the core-shell quantum dots, and a display device including a light emitting element that includes the quantum dot-polymer composite.

Abstract: There is provided a projection display (200), and a method for illuminating a projection display (200). The projection display (200) comprising a waveguide (2) comprising an input grating (4) having a plurality of linear diffractive features (6), the input grating (4) configured to couple in light into the waveguide (2), and an array of LEDs configured to form an illumination pupil which is optically relayed as an input pupil (8) onto the input grating (4), such that at the input grating (4) the input pupil (8) has a shape that is larger in a direction parallel to the linear diffractive features (6) than in a direction perpendicular to the linear diffractive features (6).