Abstract:
A wide color gamut display without color filters is obtained by supplying pump light, modulated according to the electronically prescribed brightness values, to an arrangement of red, green and blue emitting quantum dots that have non-zero Stokes' shift. The pump-light modulating matrix can be an (AM-) LCD without color filters. Any electronically brightness controlled blue or near-UV emitting matrix can be used instead of the pump-light modulating LC matrix as an excitation source for geometrically aligned quantum dots. Filter losses and design constraints for the liquid crystal cells and viewing angle limitations are eliminated.
Abstract:
A white light LED is described that uses an LED die that emits visible blue light in a wavelength range of about 450-470 nm. A red phosphor or quantum dot material converts some of the blue light to a visible red light having a peak wavelength between about 605-625 nm with a full-width-half-maximum (FWHM) less than 80nm. A green phosphor or quantum dot material converts some of the blue light to a green light having a FWHM greater than 40nm, wherein the combination of the blue light, red light, and green light produces a white light providing a color rendering of R a,8 >90 and a color temperature of between 2500K-5000K. Preferably, the red and green converting material do not saturate with an LED die output of 100 W/cm 2 and can reliably operate with an LED die junction temperature over 100 degrees C.
Abstract translation:描述了使用发射在约450-470nm的波长范围内的可见蓝光的LED管芯的白光LED。 红色荧光体或量子点材料将一些蓝色光转换成具有在约605-625nm之间的峰值波长和小于80nm的全宽半最大值(FWHM)的可见红光。 绿色荧光体或量子点材料将一些蓝色光转换成具有大于40nm的FWHM的绿色光,其中蓝色光,红色光和绿色光的组合产生白色光,提供Ra,8的显色性 > 90°,色温在2500K-5000K之间。 优选地,红色和绿色转换材料对于100W / cm 2的LED管芯输出不饱和,并且可以在LED管芯结温超过100摄氏度时可靠地工作。
Abstract:
A ceramic body is disposed in a path of light emitted by a light source. The light source may include a semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region. The ceramic body includes a plurality of first grains configured to absorb light emitted by the light source and emit light of a different wavelength, and a plurality of second grains. For example, the first grains may be grains of luminescent material and the second grains may be grains of a luminescent material host matrix without activating dopant.
Abstract:
Phosphor-converted light emitting diodes comprising a blue or near-UV emitting semiconductor device, a yellow-green phosphor, and a red phosphor exhibit incandescent-like dimming behavior in that the Correlated Color Temperature of a white light output decreases with reduced brightness. In one aspect, a light emitting device comprises an LEO emitting blue light, a first phosphor excited by the blue light emitted by the LED and in response emitting green or greenish-yellow light, and a second phosphor excited by the blue light emitted by the LED and in response emitting red light.
Abstract:
The invention relates to a tri-color lamp for generating white 1ight comprising a phosphor composition comprising a phosphor of general formula (Ba1-x-y-z-SrxCay)2SiO4:Euz, wherein 0
Abstract translation:本发明涉及一种用于产生白光的三色灯,其包括含有通式(Ba 1-xyz-Sr x Ca y)2 SiO 4:Eu z的磷光体的磷光体组合物,其中0≤x≤1,0≤y≤1 并且0