CN100492109C - 设定led光源色彩点的方法和装置 - Google Patents

设定led光源色彩点的方法和装置 Download PDF

Info

Publication number
CN100492109C
CN100492109C CNB2005100855903A CN200510085590A CN100492109C CN 100492109 C CN100492109 C CN 100492109C CN B2005100855903 A CNB2005100855903 A CN B2005100855903A CN 200510085590 A CN200510085590 A CN 200510085590A CN 100492109 C CN100492109 C CN 100492109C
Authority
CN
China
Prior art keywords
tristimulus values
color point
user
pulse
selected color
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CNB2005100855903A
Other languages
English (en)
Other versions
CN1737647A (zh
Inventor
李永作
林练力
李察嘉华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Avago Technologies International Sales Pte Ltd
Original Assignee
Avago Technologies ECBU IP Singapore Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avago Technologies ECBU IP Singapore Pte Ltd filed Critical Avago Technologies ECBU IP Singapore Pte Ltd
Publication of CN1737647A publication Critical patent/CN1737647A/zh
Application granted granted Critical
Publication of CN100492109C publication Critical patent/CN100492109C/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20Controlling the colour of the light
    • H05B45/22Controlling the colour of the light using optical feedback
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20Controlling the colour of the light

Abstract

在一实施例中,接收一用户所选色彩点。然后得出该色彩点的RGB三色值。同时判断该用户所选色彩点是否超出LED光源的色彩选择范围,如果超出则设定一错误标志。并且为LED光源的复数个LED驱动器产生脉宽调制信号。在另一实施例中,接收表示LED光源所产生光的色彩的三色值。然后比较所接收到的三色值和对应于用户所确定色彩点的三色值。响应于该比较,为LED光源的复数个LED驱动器产生脉宽调制信号。在这些动作重复一预定次数后,如果LED光源未实现用户所选色彩点,则设定一错误标志。

Description

设定LED光源色彩点的方法和装置
技术领域
在一实施例中,接收一用户所选色彩点。然后得出该色彩点的RGB三色值。同时判断该用户所选色彩点是否超出LED光源的色彩选择范围,如果超出则设定一“错误”标志。另外为LED光源的复数个LED驱动器产生脉宽调制信号。在另一实施例中,接收表示LED光源所产生光的色彩的三色值。然后比较所接收到的三色值和对应于用户所确定色彩点的三色值。响应于该比较,为LED光源的复数个LED驱动器产生脉宽调制信号。当这些动作重复一预定次数后,如果LED光源未实现用户所选色彩点,则设定一“错误”标志。
背景技术
人们一直使用复数个不同色彩(例如:红色、绿色和蓝色)的发光二极管(LED)发出的光来产生一具有预定光谱平衡的光源(例如:“白”光源)。参见(例如)Nishimura的名称为“Method and Apparatus for Measuring SpectralContent of LED Light Source and Control Thereof”的美国专利第6,448,550号。有时,用户可能希望设定一LED光源的色彩点--特别是在诸如液晶显示器(LCD)背光照明和装饰照明等应用中。
发明内容
一第一种方法,其包括:接收用户所选色彩点。然后得出用户所选色彩点的红、绿及蓝(RGB)三色值,其中该等RGB三色值受LED光源的色彩传感系统影响。同时判断用户所选色彩点是否超出了LED光源的色彩选择范围,如果超出则设定一错误标志。并且为LED光源的复数个LED驱动器产生脉宽调制信号。
一第二种方法,其包括:接收表示LED光源所产生光的色彩的三色值。然后将该等所接收到的三色值与用户确定色彩点相比较。响应于该比较,为LED光源的复数个LED驱动器产生脉宽调制信号。当这些动作重复一预定次数后,如果LED光源未实现用户所选色彩点则设定一错误标志。
一用于控制LED光源的集成电路,其包括:一个接口,其用于接收在一不受装置影响的色彩空间中指定的用户所选色彩点;一个存储器,其用于存储所述用户所选色彩点的指示值;和一个控制器。该控制器配置用于:1)得出用户所选色彩点的RGB三色值;2)判断用户所选色彩点是否超出LED光源的色彩选择范围,如果超出则设定一错误标志;和3)响应于该等RGB三色值,为LED光源的复数个LED驱动器产生脉宽调制信号。
本文还揭示了本发明的其它实施例。
附图说明
附图展示了本发明的例示性及当前较佳实施例,其中:
图1、3、4展示了用于设定一LED光源色彩点的可选例示方法;
图2展示了1931 CIE色彩图;和
图5展示了一具有用于设定一LED光源色彩点的控制器的集成电路。
具体实施方式
图1展示了用于设定一LED光源色彩点的第一例示方法100。该方法100开始于接收用户所选色彩点(102)。用户可以各种方式指定色彩点,且通常可在一不受装置影响的色彩空间(例如,1931国际照明委员会(1931 CommissionInternationale de ,CIE)制定的XYZ色彩空间、Yxy色彩空间、RGB色彩空间或1976 Yu’v’色彩空间)内指定色彩点。不受装置影响的色彩空间通常可提供一个宽广的色彩范围,用户可以从中选择一色彩点。在有些情况下,用户可通过在表示一所需色彩点的色彩上点击(例如,用鼠标)来提供色彩点。在其他情况下,用户可以输入具体的亮度和色度值。
在接收到用户所选色彩点后,方法100接着得出用户选择色彩点的RGB三色值(例如:新RGB色度三色值)(104)。和可能不受装置影响的所接收色彩点不同,所得RGB三色值将受LED光源的色彩传感系统影响。
当获得RGB三色值时,判断用户所选色彩点是否超出了LED光源的色彩选择范围(106)。一LED光源的色彩选择范围是该光源可能产生的所有可能色彩点的集合。举例而言,图2提供了一1931 CIE色彩图(限定区域A表示1931CIE色彩空间)。如果光源由波长分别为R1、G1和B1的RGB发光二极管组成,则由三角形区域B表示该RGB光源的色彩选择范围。点U1表示一位于RGB光源色彩选择范围内的用户所选色彩点,点U2表示一位于RGB光源色彩选择范围之外的用户所选色彩点。如果判断一用户所选色彩点在LED光源的色彩选择范围之外,则可设定一错误标志(106)。随后,该错误标志可以被用户或用户的软件或控制装置(例如,一微控制器或计算机)检索到。或者,与LED光源相连的一控制系统会提醒用户已设定错误标志(例如,通过向用户的软件或计算机发送警示信号)。
例如,可通过首先将用户所选色彩点变换为XYZ三色值(110)(例如:CIE1931 XYZ三色值)从用户所选色彩点得出RGB三色值。然后可通过转换矩阵将这些XYZ三色值转换为RGB三色值(114)。例如,一种判定用户所选色彩点是否超出了LED光源色彩选择范围的方法是采用建立在LED光源的色彩坐标和用户所选色彩点基础上的数学方程式。
在用户所选色彩点的变换(110)中,可以判断用户所选色彩点是否无效。参见图2所示的1931 CIE色彩空间,点U3会是一个无效色彩点,因为它处于1931 CIE色彩空间之外。如果确定用户所选色彩点无效,则可设定一错误标志(112)。
方法100接着为LED光源的复数个LED驱动器产生脉宽调制信号(108)。
使用方法100,用户可以在其容易把握的不受装置影响的色彩空间内选择一LED光源的色彩点,并随后在该所选色彩点无效或无法实现时收到错误通知。
图3阐释用于设定LED光源的色彩点的第二例示方法300。方法300通过提供如何使用用户所选色彩点来控制LED光源的细节拓展了方法100。在方法300中,获到一组表示LED光源所产生光的色彩的三色值(302)。例如,此可以借助色彩传感器304、低通滤波器306和模数转换器(ADC)308来完成。色彩传感器304可包括三个用来接收来自光源的LED的入射光的滤波光电二极管。例如,对于由红、绿、蓝LED组成的光源,三个光电二极管可分别具有针对红、绿、蓝三色光的滤色器。用这种方法,不同的光电二极管可以检测不同的光波长。色彩传感器304还可包括放大电路以将光子光读数转换为输出电压。低通滤波器306可用来平均传感器的输出电压并提供对应于传感器输出电压的时间平均值的低脉动直流(DC)输出电压。然后,ADC 308可以将上述直流(DC)输出电压转换为其数字表示形式。
方法300接着比较从光源所得的三色值与用户选择色彩点的RGB三色值(310)。响应该三色值的比较310,产生用于LED驱动器的脉宽调制信号(108)。例如,作为该三色值比较的附带结果,可为LED设定驱动信号占空系数(312)(例如:通过对其进行查寻、计算或使其基于先前占空系数上的一固定增量/减量基础上)。然后,占空系数可用来产生用于LED驱动器的脉宽调制信号(108)。随后,根据LED光源的性质,可为作为一整体的光源产生一组驱动信号(314)(例如:一组红、绿、蓝色驱动信号),或为各组光源LED产生多组驱动信号。
在方法300的一实施例中,产生用于LED驱动器的脉宽调制信号以使从LED光源所得的三色值与对应于用户所确定色彩点的三色值相匹配。在方法300的另一实施例中,产生用于LED驱动器的脉宽调制信号以使从LED光源所得的三色值处于一可接受的三色值范围内(即,一接近对应于用户所确定色彩点的三色值的三色值范围)。
方法300还包含一可选错误报告例行程序316、318、320、322。通过错误报告例行程序316至322,方法300:1)接收来自LRD光源的三色值,2)比较该等三色值与对应于用户所选色彩点的三色值(310),并且3)为LED驱动器产生预定重复次数的脉宽调制信号(108)。经预定重复次数后(即,J=0),如果LED光源未实现用户所选色彩点,则方法300设定一错误标志(322)。
采用方法300,可以保持由复数个LED产生的合成光的色彩点,尽管个别LED会存在制造差异或因温度、老化及其他影响而发生光输出漂移。
图4阐释一用于设定LED光源色彩点的第三例示方法400。方法400通过提供色彩点预测例行程序402、404、406、408、410、412拓展了方法300。当预测例行程序激活时,用于光源LED的驱动信号是基于所预测(408)的脉宽调制信号而不是基于对所获得三色值与期望三色值的比较(310)产生。在一实施例中,驱动信号预测408包括对LED占空系数的预测410。例如,这些占空系数可以通过在一表中进行查寻或使用一转换矩阵进行计算来预测。随后,预测脉宽调制信号会保持一预定时间(例如,直到I=0)。作为一可选情况,如果用户确认了其色彩点选择(406),则可退出预测例行程序402至412。当退出该预测例行程序402至412时,将会根据所得三色值与期望三色值的比较310而产生LED光源的驱动信号。
图5显示了用于控制LED光源502的集成电路500。在一实施例中,LED光源502包含红、绿、蓝LED504至520。然而,LED光源还可以包括额外的及/或其它色彩的LED。另外,LED光源可以采用各种形式,例如显示器背光、重点照明或其它光源形式。
如图所示,集成电路500包括一个用于接收用户所选色彩点的接口522。例如,接口522可包括一个内置IC(I2C)或系统管理总线(SMBus)接口。通过此一接口可通过将接口与控制装置如用户的电脑、一微控制器、一或多个控制开关(如按扭或滑动部件)相连接来接收用户所选色彩点。
集成电路500还包含一个用于存储用户所选色彩点的指示值的存储器524。在一些实施例中,存储器524可以为一随机存取存储器(RAM)或一电可擦除可编程只读存储器(EEPROM)。用户所选色彩点的指示值可以各种方式包含用户所选色彩点(例如,以色度和亮度值的形式)或建立在其上的三色值或中间数据。
集成电路500进一步包括一个控制器526。在一实施例中,控制器526被配置用来:1)取得用户所选色彩点的RGB三色值;2)判断用户所选色彩点是否超出了LED光源502的色彩选择范围,如果超出则设定一错误标志;及3)响应于该等RGB三色值,为形成LED光源502的复数个LED 504至520产生驱动信号。在另一实施例中,控制器526被配置用来:1)接收表示LED光源502所产生光的色彩的三色值;2)比较所接收到的三色值与所期望的三色值;3)响应于该比较,为LED 504至520产生脉宽调制信号;和4)重复上述动作一预定次数,然后,当LED光源502未实现用户所选色彩点时设定一错误标志。控制器526还可以被配置用来执行上述任一种方法100、300、400。
如图所示,控制器526可以从色彩传感器528接收表示LED光源502所产生光的色彩的三色值。色彩传感器528可以是一个单独装置,或可以各种形式包含在集成电路500或显示器502中(或上)。
控制器526产生的脉宽调制信号可以提供至一或多个LED驱动器530(例如:分别驱动显示器502的红、绿、蓝LED的三个LED驱动器)。LED驱动器530可以是一个单独装置或多个装置,或可以各种方式包含于集成电路500或显示器502中(上)。

Claims (16)

1、一种用于控制一发光二极管光源的方法,其包括:
接收一用户所选色彩点;
取得所述用户所选色彩点的红、绿、蓝三色值,所述红、绿、蓝三色值由所述发光二极管光源的一色彩传感系统而定;
判断所述用户所选色彩点是否超出所述发光二极管光源的一色彩选择范围,如果超出,则设定一错误标志;及
响应于所述红、绿、蓝三色值,为所述发光二极管光源的复数个发光二极管驱动器产生脉宽调制信号。
2、如权利要求1所述的方法,其中:
取得所述用户所选色彩点的红、绿、蓝三色值包括:
将所述用户所选色彩点变换为XYZ三色值;及
将所述XYZ三色值转换成红、绿、蓝三色值;且
所述方法进一步包括:如果所述用户所选色彩点的变换表明所述用户所选色彩点无效,则设定一错误标志。
3、如权利要求2所述的方法,其进一步包括:
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较及产生动作重复一预定次数后,如果所述发光二极管光源未实现所述用户所选色彩点,则设定一错误标志。
4、如权利要求2所述的方法,其进一步包括:
如果一色彩点预测例行程序处于激活状态,则
预测所述发光二极管的脉宽调制信号;及
将所述所预测的脉宽调制信号保持一预定时间;且
如果所述色彩点预测例行程序处于非激活状态,则
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较及产生动作重复一预定次数后,如果所述发光二极管光源未实现所述用户所选色彩点,则设定一错误标志。
5、如权利要求1所述的方法,其进一步包括:
如果一色彩点预测例行程序处于激活状态,则
预测所述发光二极管的脉宽调制信号;及
将所述所预测的脉宽调制信号保持一预定时间;且
如果所述色彩点预测例行程序处于非激活状态,则
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;及
重复所述接收、比较及产生动作。
6、如权利要求1所述的方法,其进一步包括:
如果一色彩点预测例行程序处于激活状态,则
预测所述发光二极管的脉宽调制信号;及
将所述所预测的脉宽调制信号保持一预定时间;且如果所述色彩点预测例行程序处于非激活状态,则
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较及产生动作重复一预定次数后,如果所述发光二极管光源没有实现所述用户所选色彩点,则设定一错误标志。
7、如权利要求1所述的方法,其进一步包括:
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较及产生动作重复一预定次数后,如果所述发光二极管光源未实现所述用户所选色彩点,则设定一错误标志。
8、如权利要求1所述的方法,其中所述色彩点是在一不受装置影响的色彩空间内选择的。
9、如权利要求8所述的方法,其中所述不受装置影响的色彩空间为一1931国际照明委员会XYZ色彩空间。
10、一种用于控制一发光二极管光源的集成电路,其包括:
一用于接收一用户所选色彩点的接口;
一用于存储所述用户所选色彩点的一指示值的存储器;和
一控制器,其配置用于:
取得所述用户所选色彩点的红、绿、蓝三色值;
判断所述用户所选色彩点是否超出所述发光二极管光源的一色彩选择范围,如果超出,则设定一错误标志;及
响应于所述红、绿、蓝三色值,为所述发光二极管光源的复数个发光二极管驱动器产生脉宽调制信号。
11、如权利要求10所述的集成电路,其中:
所述控制器通过下述步骤取得所述用户所选色彩点的红、绿、蓝三色值:
将所述用户所选色彩点变换为XYZ三色值;及
将所述XYZ三色值转换为红、绿、蓝三色值;且
所述控制器进一步配置用于在所述用户所选色彩点的变换表明所述用户所选色彩点无效的情况下设定一错误标志。
12、如权利要求10所述的集成电路,其中所述控制器进一步配置用于:
接收表示由所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较和产生动作重复一预定次数后,如果所述发光二极管光源没有实现所述用户所选色彩点,则设定一错误标志。
13、如权利要求10所述的集成电路,其中所述控制器进一步配置用于执行一色彩点预测例行程序,其中:
如果所述色彩点预测例行程序处于激活状态,则所述控制器:
预测所述光源的发光二极管的脉宽调制信号;及
将所述所预测的脉宽调制信号保持一预定时间;且
如果所述色彩点预测例行程序处于非激活状态,则所述控制器:
接收表示所述发光二极管光源所产生光的一色彩的三色值;
比较所述所接收到的三色值与所述红、绿、蓝三色值;
响应于所述比较,产生所述脉宽调制信号;
重复所述接收、比较及产生动作;及
在所述接收、比较和产生动作重复一预定次数后,如果所述发光二极管光源未实现所述用户所选色彩点,则设定一错误标志。
14、如权利要求10所述的集成电路,其中所述脉宽调制信号包括三个脉宽调制信号,所述三个脉宽调制信号分别对应于所述发光二极管光源的红、绿、蓝发光二极管。
15、如权利要求10所述的集成电路,其中所述接口为一内置IC接口。
16、如权利要求10所述的集成电路,其中所述接口为一系统管理总线接口。
CNB2005100855903A 2004-07-28 2005-07-25 设定led光源色彩点的方法和装置 Active CN100492109C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/902,409 US7324076B2 (en) 2004-07-28 2004-07-28 Methods and apparatus for setting the color point of an LED light source
US10/902,409 2004-07-28

Publications (2)

Publication Number Publication Date
CN1737647A CN1737647A (zh) 2006-02-22
CN100492109C true CN100492109C (zh) 2009-05-27

Family

ID=35106969

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2005100855903A Active CN100492109C (zh) 2004-07-28 2005-07-25 设定led光源色彩点的方法和装置

Country Status (7)

Country Link
US (1) US7324076B2 (zh)
EP (1) EP1622427B1 (zh)
JP (2) JP4776294B2 (zh)
KR (1) KR101175806B1 (zh)
CN (1) CN100492109C (zh)
DE (1) DE602005017854D1 (zh)
TW (1) TW200614545A (zh)

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005024449A1 (de) * 2005-02-25 2006-09-07 Erco Leuchten Gmbh Leuchte
JP2009514159A (ja) * 2005-11-01 2009-04-02 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 可変色照明システムのためのコントローラ
CN101454613A (zh) 2006-05-31 2009-06-10 科锐Led照明科技公司 具有颜色控制的照明装置及其照明方法
CN101491160A (zh) * 2006-07-13 2009-07-22 Tir科技公司 光源和用于优化光源照明特性的方法
KR100968451B1 (ko) * 2006-10-16 2010-07-07 삼성전자주식회사 디스플레이장치 및 그 제어방법
KR101314324B1 (ko) * 2006-11-30 2013-10-02 엘지디스플레이 주식회사 에프에스씨 액정표시장치용 구동회로 및 그 구동방법
RU2470496C2 (ru) * 2006-12-11 2012-12-20 Конинклейке Филипс Электроникс Н.В. Система и способ управления осветительными приборами
EP2092797B1 (en) * 2006-12-11 2012-11-21 Koninklijke Philips Electronics N.V. Method and apparatus for digital control of a lighting device
KR101531378B1 (ko) * 2006-12-11 2015-06-25 코닌클리케 필립스 엔.브이. 조명기 제어 시스템 및 방법
KR101385453B1 (ko) * 2007-05-02 2014-04-21 삼성디스플레이 주식회사 광원의 구동방법 및 이를 수행하기 위한 백라이트 어셈블리
TWI403803B (zh) * 2007-05-14 2013-08-01 Au Optronics Corp 背光模組之校正方法
US7712917B2 (en) 2007-05-21 2010-05-11 Cree, Inc. Solid state lighting panels with limited color gamut and methods of limiting color gamut in solid state lighting panels
KR101388977B1 (ko) * 2007-08-07 2014-04-25 엘지디스플레이 주식회사 액정표시장치의 백라이트 구동방법 및 장치
US8866410B2 (en) 2007-11-28 2014-10-21 Cree, Inc. Solid state lighting devices and methods of manufacturing the same
KR101503309B1 (ko) * 2007-12-06 2015-03-17 엘지디스플레이 주식회사 백라이트 유닛의 색보정 장치
KR101511127B1 (ko) * 2008-01-22 2015-04-10 삼성디스플레이 주식회사 광원 구동 방법, 광원 구동 장치 및 이를 갖는 표시장치
US8368319B2 (en) 2008-02-07 2013-02-05 Nxp B.V. Multi-core light engine architecture
US9827439B2 (en) 2010-07-23 2017-11-28 Biological Illumination, Llc System for dynamically adjusting circadian rhythm responsive to scheduled events and associated methods
US9532423B2 (en) 2010-07-23 2016-12-27 Lighting Science Group Corporation System and methods for operating a lighting device
US9681522B2 (en) 2012-05-06 2017-06-13 Lighting Science Group Corporation Adaptive light system and associated methods
US9024536B2 (en) 2011-12-05 2015-05-05 Biological Illumination, Llc Tunable LED lamp for producing biologically-adjusted light and associated methods
US8841864B2 (en) 2011-12-05 2014-09-23 Biological Illumination, Llc Tunable LED lamp for producing biologically-adjusted light
US8686641B2 (en) 2011-12-05 2014-04-01 Biological Illumination, Llc Tunable LED lamp for producing biologically-adjusted light
US8743023B2 (en) 2010-07-23 2014-06-03 Biological Illumination, Llc System for generating non-homogenous biologically-adjusted light and associated methods
WO2012044183A1 (en) * 2010-09-29 2012-04-05 Suron Therapy Limited Preservation apparatus & method
US8754832B2 (en) 2011-05-15 2014-06-17 Lighting Science Group Corporation Lighting system for accenting regions of a layer and associated methods
US9173269B2 (en) 2011-05-15 2015-10-27 Lighting Science Group Corporation Lighting system for accentuating regions of a layer and associated methods
US8901850B2 (en) 2012-05-06 2014-12-02 Lighting Science Group Corporation Adaptive anti-glare light system and associated methods
CN102291552A (zh) * 2011-08-22 2011-12-21 天津三星电子有限公司 可依背景颜色变色的电视机边框
CN103906463A (zh) * 2011-10-28 2014-07-02 皇家飞利浦有限公司 具有监测功能的照明系统
US9220202B2 (en) 2011-12-05 2015-12-29 Biological Illumination, Llc Lighting system to control the circadian rhythm of agricultural products and associated methods
US9289574B2 (en) 2011-12-05 2016-03-22 Biological Illumination, Llc Three-channel tuned LED lamp for producing biologically-adjusted light
US9913341B2 (en) 2011-12-05 2018-03-06 Biological Illumination, Llc LED lamp for producing biologically-adjusted light including a cyan LED
US9402294B2 (en) 2012-05-08 2016-07-26 Lighting Science Group Corporation Self-calibrating multi-directional security luminaire and associated methods
US9174067B2 (en) 2012-10-15 2015-11-03 Biological Illumination, Llc System for treating light treatable conditions and associated methods
US20140268731A1 (en) 2013-03-15 2014-09-18 Lighting Science Group Corpporation Low bay lighting system and associated methods
US9572231B2 (en) 2013-11-01 2017-02-14 Telelumen, LLC Synthesizing lighting to control apparent colors
US10403607B2 (en) * 2015-03-16 2019-09-03 Bridgelux Inc. Chip-on-board design with color mixing
US9943042B2 (en) 2015-05-18 2018-04-17 Biological Innovation & Optimization Systems, LLC Grow light embodying power delivery and data communications features
US10523690B2 (en) 2015-06-30 2019-12-31 K4Connect Inc. Home automation system including device controller for terminating communication with abnormally operating addressable devices and related methods
WO2017004184A1 (en) 2015-06-30 2017-01-05 K4Connect Inc. Home automation system including device signature pairing and related methods
US10630649B2 (en) 2015-06-30 2020-04-21 K4Connect Inc. Home automation system including encrypted device connection based upon publicly accessible connection file and related methods
US10200208B2 (en) 2015-06-30 2019-02-05 K4Connect Inc. Home automation system including cloud and home message queue synchronization and related methods
WO2017004204A1 (en) 2015-06-30 2017-01-05 K4Connect Inc. Home automation (ha) system including desired scene implementation based upon user-selectable list of addressable ha devices and related methods
US10893467B2 (en) 2015-06-30 2021-01-12 K4Connect Inc. Home automation system including selective operation of paired device based upon voice commands and related methods
US11227674B2 (en) 2015-06-30 2022-01-18 K4Connect Inc. Home automation system generating user health score and related methods
US9844116B2 (en) 2015-09-15 2017-12-12 Biological Innovation & Optimization Systems, LLC Systems and methods for controlling the spectral content of LED lighting devices
US9788387B2 (en) 2015-09-15 2017-10-10 Biological Innovation & Optimization Systems, LLC Systems and methods for controlling the spectral content of LED lighting devices
US10595376B2 (en) 2016-09-13 2020-03-17 Biological Innovation & Optimization Systems, LLC Systems and methods for controlling the spectral content of LED lighting devices
US10637680B2 (en) 2017-12-06 2020-04-28 K4Connect Inc. Home automation system including shareable capacity determining hub devices and related methods
US10708079B2 (en) 2017-12-07 2020-07-07 K4Connect Inc. Home automation system including designated hub device to push downloaded media content and related methods
US10686620B2 (en) 2017-12-07 2020-06-16 K4Connect Inc. Home automation system including designated user interface device to push downloaded media content and related methods
US11109468B1 (en) * 2020-10-22 2021-08-31 Lumileds Llc Lighting apparatus with reduced abrupt brightness changes

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3032619B2 (ja) * 1991-09-13 2000-04-17 松下電工株式会社 色温度可変照明装置
JP4495814B2 (ja) 1999-12-28 2010-07-07 アビックス株式会社 調光式led照明器具
US6498440B2 (en) * 2000-03-27 2002-12-24 Gentex Corporation Lamp assembly incorporating optical feedback
US6448550B1 (en) * 2000-04-27 2002-09-10 Agilent Technologies, Inc. Method and apparatus for measuring spectral content of LED light source and control thereof
US6411046B1 (en) * 2000-12-27 2002-06-25 Koninklijke Philips Electronics, N. V. Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control
US6510995B2 (en) 2001-03-16 2003-01-28 Koninklijke Philips Electronics N.V. RGB LED based light driver using microprocessor controlled AC distributed power system
US6507159B2 (en) * 2001-03-29 2003-01-14 Koninklijke Philips Electronics N.V. Controlling method and system for RGB based LED luminary
US6576881B2 (en) 2001-04-06 2003-06-10 Koninklijke Philips Electronics N.V. Method and system for controlling a light source
US6596977B2 (en) * 2001-10-05 2003-07-22 Koninklijke Philips Electronics N.V. Average light sensing for PWM control of RGB LED based white light luminaries
US6630801B2 (en) * 2001-10-22 2003-10-07 Lümileds USA Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes
JP3815604B2 (ja) * 2001-11-02 2006-08-30 株式会社リコー 画像読取り装置
US20030111533A1 (en) * 2001-12-19 2003-06-19 Koninklijke Philips Electronics N.V. RGB led based white light control system with quasi-uniform color metric
US6552495B1 (en) 2001-12-19 2003-04-22 Koninklijke Philips Electronics N.V. Adaptive control system and method with spatial uniform color metric for RGB LED based white light illumination
JP2004111357A (ja) * 2002-07-09 2004-04-08 Topcon Corp 光源装置

Also Published As

Publication number Publication date
JP2011187453A (ja) 2011-09-22
CN1737647A (zh) 2006-02-22
US7324076B2 (en) 2008-01-29
JP2006040895A (ja) 2006-02-09
TW200614545A (en) 2006-05-01
KR101175806B1 (ko) 2012-08-24
DE602005017854D1 (de) 2010-01-07
KR20060048787A (ko) 2006-05-18
EP1622427A2 (en) 2006-02-01
EP1622427B1 (en) 2009-11-25
US20060022999A1 (en) 2006-02-02
JP4776294B2 (ja) 2011-09-21
EP1622427A3 (en) 2007-04-18

Similar Documents

Publication Publication Date Title
CN100492109C (zh) 设定led光源色彩点的方法和装置
CN1538377B (zh) 彩色有机发光二极管显示系统
US7972028B2 (en) System, method and tool for optimizing generation of high CRI white light, and an optimized combination of light emitting diodes
US20110241552A1 (en) Method for maximizing the performance of a luminaire
CN100490594C (zh) 基于红绿兰的发光二极管发光体系统
US8203284B2 (en) Driving light emitting diodes
US10652962B1 (en) Dim-to-warm LED circuit
CN101536607A (zh) 用于确定驱动值以驱动照明装置的方法和驱动器
EP2151819A1 (en) Apparatus and method for displaying screen according to intensity of brightness of ambient light
US20090078852A1 (en) Chrominance compensation method and panel lightening method in a display apparatus
CN101257752A (zh) 用于场序照明系统中的恒定颜色点的颜色管理控制器
CN109729617B (zh) 用于校准led照明的方法和设备
US20060000963A1 (en) Light source calibration
JP2013505552A (ja) 照明システムの色制御
CN101635131B (zh) 背光驱动电路及光源驱动单元
EP1659830A1 (en) Combined exponential/linear RGB LED I-sink digital-to-analog converter
CN101569237B (zh) 调整固态照明装置的驱动信号
JP6334158B2 (ja) 表示装置及び表示装置の制御方法
Kumar et al. Color selection algorithm design for smart lighting application
KR100972634B1 (ko) 태양광과 일치하는 색 온도 제어 방법 및 제어장치
CN109152163B (zh) 一种非实时系统中呼吸灯的控制方法及装置
CN220440951U (zh) 一种智能led指示灯
CN113056059B (zh) 一种led驱动方法及装置
CN101123053A (zh) 发光二极管显示模组
Abd Rahim et al. The development of computer controlled multicolor illumination network using RGB based light emitting diodes

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20070105

Address after: Singapore Singapore

Applicant after: Annwa high tech ECBU IP (Singapore) Pte Ltd

Address before: Singapore Singapore

Applicant before: Avago Technologies General IP (Singapore) Pte. Ltd.

C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) CORPORAT

Effective date: 20130507

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20130507

Address after: Singapore Singapore

Patentee after: Avago Technologies Fiber IP Singapore Pte. Ltd.

Address before: Singapore Singapore

Patentee before: Avago Technologies ECBU IP (Singapore) Sdn Bhd

TR01 Transfer of patent right

Effective date of registration: 20181016

Address after: Singapore Singapore

Patentee after: Annwa high tech Limited by Share Ltd

Address before: Singapore Singapore

Patentee before: Avago Technologies Fiber IP Singapore Pte. Ltd.

TR01 Transfer of patent right