摘要:
Hand-holdable toy light tube comprising a handle, a light source and a tube of color shifting film. The light source is preferably disposed within an end of the handle. The tube of color shifting film extends from the end of the handle. During use, light from the light source interacts with the tube of color shifting film, producing a brilliant colored effect. Movement of the handle and thus of the tube of color shifting film produces multiple colors.
摘要:
Highly efficient diffusely reflecting multilayer mirrors diffusely reflect light incident upon them. Highly efficient diffusely reflecting multilayer polarizers diffusely reflect light of one polarization while diffusely transmitting the other polarization. The diffusely reflecting mirror includes a light diffusing element and a multilayer mirror element. The diffusely reflecting polarizer includes a light diffusing element and a multilayer reflective polarizing element.
摘要:
Highly efficient diffusely reflecting multilayer mirrors diffusely reflect light incident upon them. Highly efficient diffusely reflecting multilayer polarizers diffusely reflect light of one polarization while diffusely transmitting the other polarization. The diffusely reflecting mirror includes a light diffusing element and a multilayer mirror element. The diffusely reflecting polarizer includes a light diffusing element and a multilayer reflective polarizing element.
摘要:
Provided is a flexible light emitting semiconductor device (26), such as an LED device, that includes a flexible dielectric layer (12) having first and second major surfaces and at least one via (10) extending through the dielectric layer from the first to the second major surface, with a conductive layer (19, 20, 18) on each of the first and second major surfaces and in the via. The conductive layer (18) in the via supports a light emitting semiconductor device (26) and is electrically isolated from the conductive layer (19) on the first major surface of the dielectric layer.
摘要:
Phosphor assemblies include a phosphor layer and a broadband reflector attached to the phosphor layer. The phosphor assembly can be combined with a short wavelength (e.g. blue) emitting LED and other optional components to provide a remote phosphor lighting system. At least some LED light passes through the phosphor layer before reaching the broadband reflector. The broadband reflector provides high reflectivity for both the LED light and the longer wavelength phosphor light. The degree of transparency or of transmission of the phosphor layer to LED light can be tailored to increase the broadband light output of the lighting system. Such increase can actually be achieved by decreasing the amount of phosphor used in the phosphor layer. The single pass transmission T of the phosphor layer to the LED light may be from 30 to 65%, and the reflectivity of the broadband reflector may be at least 90, 94, or 98%.
摘要:
A broadband light source includes a phosphor layer excited by light from multiple LEDs. A dichroic reflector reflects light from the LEDs onto the phosphor layer. First and second LEDs are responsible for first and second broadband portions respectively of a broadband output light of the source, each such broadband portion being broadband and nominally white. The device components are configured and arranged so that the first and second broadband light portions have different CIE color coordinates. These portions combine to yield a resultant color for the overall broadband light output of the source, which resultant color is a func tion of the relative amounts of the first and second broadband light portions. An open-loop or closed-loop controller can independently drive the LEDs to provide a desired mix of the broadband light portions so that the overall broadband light output has a color in a desired design space.
摘要:
A light diffusing optical construction is disclosed. The optical construction includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle AH and in a second direction orthogonal to the first direction with a second viewing angle AV. The ratio AH/AV is at least about 2. The optical construction also includes a substantially specular reflector that reflects light that is not scattered by the asymmetric optical diffuser. The substantially specular reflector has a first average reflectance Ro in the visible at a substantially zero incident angle and a second average reflectance R45 in the visible at a substantially 45 degree incident angle. The ratio Ro/R45 is at least about 1.5. The optical construction also includes a light absorbing layer that absorbs light that is not reflected by the specular reflector.
摘要:
Multilayer reflective polarizers are disclosed that utilize a thick film multilayer stack and that are suitable for use in liquid crystal display devices. The disclosed polarizers can be mechanically stiff and suitable for use as a plate or substrate for other light control films within the display. The polarizers can also include diffusing means to scatter transmitted light of the pass state, reflected light of the block state, or both.
摘要:
A light emitting article is disclosed and includes a light emitting diode having an n-layer or p-layer with a first refractive index value. A planarizing layer having a refractive index value equal to or greater than the first refractive index value is disposed on the n-layer or p-layer, and a patterned electrode is disposed on the n-layer or p-layer. An extractor having a light input surface is optically coupled to the planarizing layer.
摘要:
An illumination assembly includes a compliant substrate comprising a first and second electrically conductive foil separated by an electrically insulating layer. The insulating layer includes a polymer material loaded with particles that enhance thermal conductivity of the insulating layer. A plurality of LED dies are disposed on the first conductive foil.