公开(公告)号：US20150002034A1

公开(公告)日：2015-01-01

申请号：US14300293

申请日：2014-06-10

Applicant: Cree, Inc.

Inventor： Antony P. van de Ven ,  Jason E. Taylor ,  Paul K. Pickard ,  Gauss Ho Ching So ,  Heidi M. Dieringer ,  Andrew Dummer

IPC: H05B33/08

CPC classification number: H05B33/0824 ,  H05B33/0827 ,  H05B33/086 ,  H05B33/0863 ,  H05B33/0896

Abstract: Semiconductor light emitting devices are provided that include a first string of light emitting diodes (“LED”) that emit unsaturated light having a color point that is within at least eight MacAdam ellipses of one or more points within a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit unsaturated light having color point that is within at least eight MacAdam ellipses from one or more points within a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit is provided that is configured to supply a first drive current to the first string of LEDs, a second drive current to the second string of LEDs and a third drive current to the third string of LEDs, wherein at least two of the first, second and third drive currents are independently controllable.

Abstract translation: 提供半导体发光器件，其包括发射不饱和光的第一串发光二极管（“LED”），其具有位于第一蓝移黄色区域内的一个或多个点的至少八个MacAdam椭圆内的色点 在1931年CIE色度图上，发射不饱和光的第二串LED，其具有在1931 CIE色度图上的第二个蓝移绿色区域内的一个或多个点的至少八个MacAdam内的色点，并且 发射主波长在600和720nm之间的辐射的第三光源。 提供了一种驱动电路，其被配置为向第一串LED提供第一驱动电流，向第二串LED提供第二驱动电流，并向第三串LED提供第三驱动电流，其中，第一串中的至少两个 ，第二和第三驱动电流是独立可控的。

公开(公告)号：US09006986B2

公开(公告)日：2015-04-14

申请号：US14300293

申请日：2014-06-10

Applicant: Cree, Inc.

Inventor： Antony P. van de Ven ,  Jason E. Taylor ,  Paul K. Pickard ,  Gauss Ho Ching So ,  Heidi M. Dieringer ,  Andrew Dummer

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0824 ,  H05B33/0827 ,  H05B33/086 ,  H05B33/0863 ,  H05B33/0896

Abstract: Semiconductor light emitting devices are provided that include a first string of light emitting diodes (“LED”) that emit unsaturated light having a color point that is within at least eight MacAdam ellipses of one or more points within a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit unsaturated light having color point that is within at least eight MacAdam ellipses from one or more points within a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit is provided that is configured to supply a first drive current to the first string of LEDs, a second drive current to the second string of LEDs and a third drive current to the third string of LEDs, wherein at least two of the first, second and third drive currents are independently controllable.

Abstract translation: 提供半导体发光器件，其包括发射不饱和光的第一串发光二极管（“LED”），其具有位于第一蓝移黄色区域内的一个或多个点的至少八个MacAdam椭圆内的色点 在1931年CIE色度图上，发射不饱和光的第二串LED，其具有在1931 CIE色度图上的第二个蓝移绿色区域内的一个或多个点的至少八个MacAdam内的色点，并且 发射主波长在600和720nm之间的辐射的第三光源。 提供了一种驱动电路，其被配置为向第一串LED提供第一驱动电流，向第二串LED提供第二驱动电流，并向第三串LED提供第三驱动电流，其中，第一串中的至少两个 ，第二和第三驱动电流是独立可控的。