公开(公告)号：US20170027037A1

公开(公告)日：2017-01-26

申请号：US15061310

申请日：2016-03-04

Applicant: NXP B.V.

Inventor： Aliaksei Sedzin ,  Marc Vlemmings

IPC: H05B33/08

CPC classification number: H05B33/0857 ,  H05B33/0845 ,  H05B33/086

Abstract: A method, controller and lighting circuit are disclosed: the variation of chromaticity and luminosity of LEDs as a function of temperature over an operating temperature range is characterised; virtual LEDs, including a virtual white are defined, such that the chromaticity of each virtual LED can be achieved by combining component light from the LEDs for all temperatures within the operating range; the requested settings R, G, B of each of three primary colours, defining a requested chromaticity and a requested luminance, are used to determine a virtual white control setting corresponding to a maximum fraction of a total luminance at the requested chromaticity which can be provided by the virtual white LED; control settings for each of the other LEDs are thereby determined, and the setting for each of the LEDs is determined from the sum of that LED's component of the virtual LEDs.

Abstract translation: 公开了一种方法，控制器和照明电路：在工作温度范围内，作为温度的函数的LED的色度和亮度的变化被表征; 定义包括虚拟白色的虚拟LED，使得可以通过将来自LED的组件光组合在操作范围内的所有温度来实现每个虚拟LED的色度; 使用定义请求的色度和请求的亮度的三原色中的每一个的请求的设置R，G，B来确定对应于可以提供的所请求的色度的总亮度的最大分数的虚拟白色控制设置 由虚拟白光LED; 由此确定每个其他LED的控制设置，并且根据该LED的虚拟LED的分量的总和来确定每个LED的设置。

公开(公告)号：US09723678B2

公开(公告)日：2017-08-01

申请号：US15061310

申请日：2016-03-04

Applicant: NXP B.V.

Inventor： Aliaksei Sedzin ,  Marc Vlemmings

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0857 ,  H05B33/0845 ,  H05B33/086

Abstract: A method, controller and lighting circuit are disclosed: the variation of chromaticity and luminosity of LEDs as a function of temperature over an operating temperature range is characterized; virtual LEDs, including a virtual white are defined, such that the chromaticity of each virtual LED can be achieved by combining component light from the LEDs for all temperatures within the operating range; the requested settings R, G, B of each of three primary colors, defining a requested chromaticity and a requested luminance, are used to determine a virtual white control setting corresponding to a maximum fraction of a total luminance at the requested chromaticity which can be provided by the virtual white LED; control settings for each of the other LEDs are thereby determined, and the setting for each of the LEDs is determined from the sum of that LED's component of the virtual LEDs.