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：US09345091B2

公开(公告)日：2016-05-17

申请号：US13762923

申请日：2013-02-08

Applicant: CREE, Inc.

Inventor： Paul K. Pickard ,  Michael James Harris ,  Gary D. Trott

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0848 ,  H05B33/0893 ,  H05B37/0218 ,  H05B37/029 ,  H05B37/03 ,  Y02B20/46

Abstract: Light emitting device (LED) light fixture control systems and related methods are disclosed. A system and method in one aspect can include at least one LED configured to emit light at an illumination output level and at least one light sensor configured to measure the illumination output level of light emitted by the LED. A system and method can also include a control unit configured to detect the illumination output level emitted by the at least one LED falling below an original illumination output level and to increase the illumination output level by the at least one LED to produce a predetermined lighting level associated with the original illumination output level in an area.

Abstract translation: 公开了发光器件（LED）灯具控制系统及相关方法。 一个方面的系统和方法可以包括被配置为以照明输出电平发光的至少一个LED和被配置成测量由LED发射的光的照明输出电平的至少一个光传感器。 系统和方法还可以包括控制单元，其被配置为检测由低于原始照明输出电平的至少一个LED发射的照明输出电平，并且通过至少一个LED增加照明输出电平以产生预定的照明电平 与一个区域中的原始照明输出电平相关联。

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。

公开(公告)号：US20140225511A1

公开(公告)日：2014-08-14

申请号：US13762923

申请日：2013-02-08

Applicant: CREE, INC.

Inventor： Paul K. Pickard ,  Michael James Harris ,  Gary D. Trott

IPC: H05B33/08

CPC classification number: H05B33/0848 ,  H05B33/0893 ,  H05B37/0218 ,  H05B37/029 ,  H05B37/03 ,  Y02B20/46

Abstract: Light emitting device (LED) light fixture control systems and related methods are disclosed. A system and method in one aspect can include at least one LED configured to emit light at an illumination output level and at least one light sensor configured to measure the illumination output level of light emitted by the LED. A system and method can also include a control unit configured to detect the illumination output level emitted by the at least one LED falling below an original illumination output level and to increase the illumination output level by the at least one LED to produce a predetermined lighting level associated with the original illumination output level in an area.

Abstract translation: 公开了发光器件（LED）灯具控制系统及相关方法。 一个方面的系统和方法可以包括被配置为以照明输出电平发光的至少一个LED和被配置成测量由LED发射的光的照明输出电平的至少一个光传感器。 系统和方法还可以包括控制单元，其被配置为检测由低于原始照明输出电平的至少一个LED发射的照明输出电平，并且通过至少一个LED增加照明输出电平以产生预定的照明电平 与一个区域中的原始照明输出电平相关联。