Abstract:
A wavelength-conversion plate is described herein. The wavelength conversion plate may include a converter of a first ceramic material and a reflector of a second ceramic material. The first ceramic material converts the primary light emitted by a light source such as a light emitting diode (LED) into a secondary light and the second ceramic material reflects the secondary light emitted by said converter. Preferably, the converter is inlaid into the reflector so that the reflector surrounds an outer edge of the converter. Such a configuration has an advantage of reducing unwanted side emissions from the converter.
Abstract:
There is herein described a glass composite wavelength converter and a light source containing same. The glass composite wavelength converter comprises phosphor particulates dispersed in a solid glass matrix. The glass matrix is comprised of a glass selected from a soda-lime glass, a Sb 2 O 3 -Bi 2 O 3 -B 2 O 3 glass, a phosphate glass, a Bi 2 O 3 -ZnO-B 2 O 3 glass, and a PbO-ZnO-B 2 O 3 glass, wherein the phosphor particulates convert at least a portion of a primary light into a secondary light and the glass is substantially transparent to the primary light and the secondary light. In a preferred embodiment, the light source emits a warm white light having a CCT of about 3000K.
Abstract:
Wavelength converters including coarse particles/grains of a red nitride phosphor are disclosed. In some embodiments the red nitride phosphor is a (Ca,Sr,Ba) 2 Si 5 N 8 : Eu phosphor with a D50 grain size or a D50 particle size that is ≥ 5 microns. The red nitride phosphor may be encapsulated within an organic matrix or present in an inorganic matrix. In the latter case, the inorganic matrix may include fine grains with a D50 grain size
Abstract translation:公开了包括红色氮化物荧光体的粗颗粒/颗粒的波长转换器。 在一些实施方案中,红色氮化物荧光体是具有D50晶粒尺寸或≥50微米的D50粒度的(Ca,Sr,Ba)2 Si 5 N 8:Eu荧光体。 红色氮化物荧光体可以封装在有机基质中或存在于无机基质中。 在后一种情况下,无机基质可以包括具有D50晶粒尺寸<5微米的细晶粒。 还描述了制造这种波长转换器和包括这种波长转换器的装置的方法。
Abstract:
There is herein described a phosphor composition for converting the light emitted from LED dies. The phosphor composition has an emission dominant wavelength responsive to an excitation dominant wavelength. The phosphor composition includes a first phosphor, a second phosphor and a third phosphor. The phosphor composition has a first weight ratio of the first phosphor and the second phosphor, and a second weight ratio of the second phosphor and the third phosphor. The first and second weight ratios are arranged so that the emission dominant wavelength increases as the excitation dominant wavelength increases.
Abstract:
There is described a sealing composition for sealing aluminum nitride and aluminum oxynitride ceramics comprising: a mixture of SiO 2 , at least one other metal oxide, and a silicon additive comprising at least one of silicon metal or a silicide. The silicon additive acts to suppress the formation of nitrogen bubbles during the sealing of articles comprised of aluminum nitride or aluminum oxynitride ceramics, e.g., as in the case of a ceramic discharge vessel for a high intensity discharge lamp.
Abstract:
There is herein described a ceramic phosphor target which may be used in a laser- activated remote phosphor application. The target comprises a substantially flat ceramic phosphor converter comprised of a photoluminescent polycrystalline ceramic which is attached to a reflective metal substrate by a high thermal conductivity adhesive.
Abstract:
A wavelength-converting structure for a wavelength-converted light emitting diode (LED) assembly. The wavelength-converting structure includes a thin film structure having a non-uniform top surface. The non-uniform top surface is configured to increase extraction of light from the top surface of a wavelength-converting structure.
Abstract:
A wavelength-converting plate for a wavelength-converted light emitting diode (LED) assembly. The wavelength-converting plate includes multiple layers of microlenses deposited thereon. The microlenses may have an index of refraction different from an index of refraction of the wavelength-converting plate.
Abstract:
There is herein described a phosphor for use in LED applications and particularly in phosphor-conversion LEDs (pc-LEDs). The phosphor has a composition represented by (Y 1-x Ce x ) 3 (Al 1-y Sc y ) 5 O 12 wherein 0
Abstract:
White-light efficiency from a light emitting diode is enhanced by recycling outwardly inwardly-penetrating light by application of a multi-layer, thin film filter between the LED die and the phosphor layer. This procedure increases the package extraction efficiency.