摘要:
Disclosed are phosphor compositions having the formulas Ca1−a−bCeaEubAl1+aSi1−aN3, where 0 0; and Ca1−g−h−iCeg(Li,Na)hEuiAl1+g−hSi1−g+hN3 where 0≦g≦0.2, 0 0. When combined with radiation from a blue or UV light source, these phosphors can provide light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above phosphors and additional phosphors.
摘要:
A white light hybrid illumination system including an amber LED, a red LED, and a phosphor converted LED such as a blue LED chip and a green phosphor, wherein a peak emission difference between the amber and red LED is at least 25 nm. This system provides higher color quality than prior devices due to its high luminous efficacy, high CRI over a wide CCT range, and better color control.
摘要:
A white light hybrid illumination system including an amber LED, a red LED, and a phosphor converted LED such as a blue LED chip and a green phosphor, wherein a peak emission difference between the amber and red LED is at least 25 nm. This system provides higher color quality than prior devices due to its high luminous efficacy, high CRI over a wide CCT range, and better color control.
摘要:
A method for the manufacturing of white LEDs is proposed, which can achieve a tunable CCT through the use of at least two phosphor materials, each composition including at least one individual phosphor compound. The method allows optimization of the devices for any desired CCT and approximation of the color coordinates of the black body (Planckian) locus.
摘要:
There is provided yellow and red illumination systems, including a semiconductor light emitter, and a luminescent material. The systems have an emission falling within the respective ITE red and yellow color bins having specified color coordinates on the CIE chromaticity diagram. The luminescent material may include one or more phosphors. The illumination systems may be used as the red and yellow lights of a traffic light or an automotive display.
摘要:
Disclosed are phosphor compositions doped with both Ce3+ and Eu2+ and light emitting devices including a semiconductor light source and the above phosphor. Also disclosed are phosphor blends of the above phosphors and one ore more additional phosphors and white light emitting devices incorporating the same. The preferred blends are used to make light sources with CRI values greater than 90 at any CCT from about 2500 to 8000 K.
摘要:
A light emitting device including a phosphor blend including four or more phosphors emitting within a specific spectral range to optimize the color rendering index (CRI) for a given color coordinated temperature (CCT). The blend will include at least four phosphors selected from the following: a blue phosphor having an emission peak at 400-500 nm, a green phosphor having an emission peak at 500-575 nm, an orange phosphor having an emission peak from 575-615 nm, and a deep red phosphor having an emission peak at 615-680 nm. The preferred blends are used to make light sources with general CRI values (Ra) greater than 95 at CCT's from about 2500 to 8000 K.
摘要翻译:一种发光器件,包括包含在特定光谱范围内发射的四种或更多种磷光体的荧光体掺合物,以优化给定颜色协调温度(CCT)的显色指数(CRI)。 共混物将包括选自以下的至少四种荧光体:在400-500nm具有发光峰的蓝色荧光体,在500-575nm具有发光峰的绿色荧光体,具有575-615的发射峰的橙色荧光体 nm,在615-680nm具有发光峰的深红色荧光体。 优选的共混物用于在CCT下从约2500至8000K制备具有大于95的通用CRI值(R a a)的光源。
摘要:
Light emitting apparatuses including warm white LED based lights including a semiconductor light source and a phosphor material including a yellow emitting phosphor, a red emitting phosphor, and, optionally, at least one of a green, blue or green-blue emitting phosphor.
摘要:
A light emitting package (8, 8′, 8″, 208, 408) includes a printed circuit board (10, 10′, 10″, 210, 410) supporting at least one light emitting die (12, 12″, 14, 16, 212, 412). A light transmissive cover (60, 60′, 60″, 260, 460) is disposed over the at least one light emitting die. The cover has an open end defining a cover perimeter (62, 62′, 62″, 262, 462) connected with the printed circuit board. An inside surface of the cover together with the printed circuit board defines an interior volume (70, 70″, 270, 470) containing the at least one light emitting die. An encapsulant (76, 76″, 276, 278, 476) is disposed in the interior volume and covers at least the light emitting die.