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CN1668158A - 使用发光二极管产生白光的系统和方法 - Google Patents

使用发光二极管产生白光的系统和方法 Download PDF

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CN1668158A
CN1668158A CNA2005100072886A CN200510007288A CN1668158A CN 1668158 A CN1668158 A CN 1668158A CN A2005100072886 A CNA2005100072886 A CN A2005100072886A CN 200510007288 A CN200510007288 A CN 200510007288A CN 1668158 A CN1668158 A CN 1668158A
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CN1668158B (zh
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林练力
李永作
伍启元
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Avago Technologies International Sales Pte Ltd
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Agilent Technologies Inc
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/3406—Control of illumination source
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    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133624—Illuminating devices characterised by their spectral emissions
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    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
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Abstract

本发明公开了一种产生白光的系统和方法，该系统和方法包括使用白光、红光、绿光和蓝光LED的组合来产生白光以及响应反馈信号调节所发射的光。照明系统具有光源和光谱反馈控制系统，其中光源包括至少一个白光发光二极管和多个彩色发光二极管，光谱反馈控制系统被配置来检测从光源输出的光并响应光检测结果来调节从光源输出的光。光谱反馈控制系统可以包括被配置来提供特定色彩反馈信号的色彩传感器，被配置来响应特定色彩反馈信号产生特定色彩控制信号的控制器，以及被配置来响应特定色彩控制信号产生特定色彩驱动信号的驱动器。

Description

使用发光二极管产生白光的系统和方法
技术领域
本发明一般地涉及照明领域，更具体地涉及使用LED产生白光的系统和方法。
背景技术
发光二极管(LED)通常是单色的半导体光源，目前已经可以得到紫外-蓝光到绿光、黄光和红光的各种色彩。许多的照明应用，比如液晶显示器(LCD)面板的背光照明，需要白光光源。使用单色LED产生白光有两种常见的方法：(1)将单独的红光、绿光和蓝光LED封装在一起，并且组合发射自这些LED的光来产生白光；(2)向紫外光、蓝光或绿光LED中引入荧光材料，使得由LED的半导体管芯发射的一些初始光被转化为波长更长的光，并且将这些波长更长的光与初始的紫外光、蓝光或绿光组合来产生白光。使用第二种方法得到的LED常常使用基于磷光体的荧光材料，并且被称为磷光体转化型白光LED。
组合红光、绿光和蓝光LED而产生的白光具有宽的色域，但却通常具有较差的显色指数(Color Rendering Index，CRI)。虽然该类型的白光光源具有宽的色域，但是该光源与磷光体转化型白光LED相比需要更为复杂的驱动电路，因为红光、绿光和蓝光LED包括有不同工作电压要求的半导体管芯。除具有不同工作电压要求外，红光、绿光和蓝光LED随它们的工作寿命而退化程度不一，这可能使得在很长的时间中进行色彩控制很困难。
磷光体转化型白光LED只需要单一类型的单色LED来产生白光，并且多LED光源的所有白光LED可以在同样的工作电压下被驱动。磷光体转化型白光LED一个缺点在于它们的光谱能量分布(Spectral PowerDistribution，SPD)并不均匀。该缺点导致相对较差的显色指数(CRI)。此外，由磷光体转化型白光LED产生的色彩易于在工作寿命期间会不同于其初始色彩，并且易于随着条件的改变而变化。
所需要的是这样的白光光源，该光源具有能够产生相对时间稳定的白光，并具有高的CRI以及宽的色域。
发明内容
产生白光的系统和方法包括使用白光、红光、绿光和蓝光LED的组合来产生白光以及响应反馈信号调节所发射的光。白光LED通常是磷光体转化型白光LED。使用磷光体转化型白光、红光、绿光和蓝光LED的组合来产生白光得到了具有改善的CRI和宽的SPD的白光。响应反馈信号来调节所发射的光允许随LED性能相对时间的变化来控制白光的亮度和色度特征。
根据本发明的照明系统包括光源和光谱反馈控制系统，其中光源包括至少一个白光发光二极管和多个彩色发光二极管，光谱反馈控制系统被配置来检测从光源输出的光并响应光检测结果来调节从光源输出的光。光谱反馈控制系统可以包括被配置来提供特定色彩反馈信号的色彩传感器，被配置来响应特定色彩反馈信号产生特定色彩控制信号的控制器，以及被配置来响应特定色彩控制信号产生特定色彩驱动信号的驱动器。
根据本发明的用于操作照明系统的方法包括向光源提供驱动信号，该光源包括至少一个磷光体转化型白光发光二极管和多个彩色发光二极管；检测响应驱动信号产生的光；响应检测的光产生反馈信号；以及调节被提供给光源的驱动信号。从检测的光产生特定色彩反馈信号。特定色彩反馈信号被用来基于每种色彩来调节用于彩色LED的驱动信号，以维持所检测光的亮度和色度特征。
通过对本发明的原理进行举例说明，并且结合附图和根据下面详细的说明，本发明其它的方面和优点将变得很清楚。
附图说明
图1描绘了根据本发明被用于背光照明液晶显示器(LCD)面板的照明系统。
图2描绘了磷光体转化型白光LED的光谱能量分布与红光、绿光和蓝光LED的光谱能量分布相对比的图。
图3描绘了图1的驱动器的扩展视图，示出了专用于白光、红光、绿光和蓝光LED的驱动器。
图4A描绘了图1的控制器的扩展视图。
图4B描绘了图1的控制器的另一个使用CIE 1931三刺激值的实施方案扩展视图。
图5描绘了根据本发明的照明系统的操作方法的流程图。
在整个说明书中，类似的标号可以被用来指示类似的元件。
具体实施方式
图1描绘了被用于背光照明液晶显示器(LCD)面板的照明系统100。该照明系统包括LCD面板102、光源104以及光谱反馈控制系统106。LCD面板在LCD显示器领域是已知的。虽然针对LCD面板进行说明，但是允许传输光的其它光学介质可以与该照明系统一起使用。
光源104被配置来响应所施加的驱动信号来产生白光。如LCD领域中已知的那样，该光源相对于LCD面板102定向，使得光入射在LCD面板的端面上。LCD面板的背光照明在本领域中是已知的，在此就不进一步说明了。图1中所描绘的光源由多个发光二极管(LED)构成，这包括LED 110和LED 112的混合，其中LED 110发射白光(本文称为“白光LED”)，LED 112发射特定色彩的单色光(本文称为“彩色LED”)。在图1的实施方案中，白光LED是磷光体转化型白光LED。磷光体转化型白光LED在LED领域中是公知的。在一个实施例中，磷光体转化型白光LED结合了这样的发射蓝光的LED，其使用比如铈激活的钇铝石榴石(Y3Al5O12：Ce3+)的磷光体。该蓝光LED发出峰值波长通常为460到480纳米(nm)的第一辐射。该磷光体部分吸收蓝光发射，并且重新发射峰值波长为560到580nm的第二宽带辐射。第一和第二辐射的组合放出白光。虽然磷光体转化型白光LED被用于白光LED，但是其它发射白光的LED也可以被用来结合彩色LED以产生白光。
在图1的实施方案中，彩色LED 112包括分别发射位于红光、绿光和蓝光光谱中的有色光的红光(R)、绿光(G)和蓝光(B)LED的混合。彩色LED在LED领域中是公知的。虽然在图1的示例性实施方案中彩色LED是红光、绿光和蓝光的，但是也可以使用其它彩色LED的组合。例如，除红光、绿光和蓝光LED外还可以使用包括青色和琥珀色LED的色彩混合，或者可以使用包括青色和琥珀色LED的色彩混合来替代红光、绿光和蓝光LED。因为磷光体转化型白光LED 110是相对有效的白光光源，所以在该光源中使用它们。但是，磷光体转化型白光LED的SPD朝向较短波长偏移，这导致相对较差的CRI。红光、绿光和蓝光LED被添加到光源来：(1)改善发射自光源的白光的CRI以及(2)控制并且保持白光。图2描绘了磷光体转化型白光LED的光谱能量分布与红光、绿光和蓝光LED的光谱能量分布相对比的图。
白光LED 110和彩色LED 112通常被沿着LCD面板102的边缘放置。如图1所描绘的那样，白光LED和彩色LED以白光、红光、白光、绿光、白光、蓝光(W R W G W B，如图1所示)的重复模式分布。虽然在图1中描绘了特定LED分布模式，但是也可以使用其它的LED模式和/或分布。LED模式和/或分布的细节相对于应用是特定的。
虽然在图1所描绘的光源104中是白光LED 110和彩色LED 112的混合，但是该光源主要由白光LED组成。在图1的整个光源中，LED的分布是对于每一个红光、绿光或蓝光LED都有一个白光LED。在另一个实施例中，用于中等大小LCD面板(例如，对角线为几英寸)的背光照明系统可以包括这样的分布：10个磷光体转化型白光LED、2个红光LED、4个绿光LED以及2个蓝光LED。
返回到图1，光谱反馈控制系统106包括色彩传感器120、控制器122和驱动器124。色彩传感器相对于LCD面板102和光源104定向，以检测从光源发射后穿过LCD面板的光。在图1的实施方案中，色彩传感器是三色传感器，产生表示所检测光特定色彩的亮度和色度特征的特定色彩反馈信号。例如，色彩传感器提供可以被用于表示与所检测光相关的三色激励信息的一组电信号。
控制器122控制构成光源104的LED 110和112的驱动。控制器从色彩传感器120接收特定色彩反馈信号，并且响应该特定色彩反馈信号产生特定色彩控制信号。特定色彩控制信号被产生来从光源产生所期望的光。
驱动器124将从控制器接收的特定色彩控制信号转换为驱动光源104的特定色彩驱动信号。例如，驱动器产生基于每种色彩来控制彩色LED112的特定色彩驱动信号。即，驱动器可以单独控制每一个彩色LED(例如，红光、绿光和蓝光)。由驱动器产生的驱动信号可以包括正被施加到LED上的电压和/或电流改变。或者，时间调制可以被用来控制发射自LED的光的强度。图3描绘了图1的驱动器的扩展视图。在图3中描绘的驱动器324包括分别用于红光、绿光和蓝光LED的特定色彩驱动器324-1、324-2和324-3以及白光驱动器324-4。这些特定色彩驱动器使驱动器能够基于每种色彩来控制彩色LED。
在工作中，图1的光谱反馈控制系统106测量从光源104输出的光的亮度和色度特征，然后响应测量结果将输出光调节到所期望的色彩。参考图1详细地说明了系统的操作。为了进行说明，从驱动器124开始，该驱动器提供驱动信号来驱动LED 110和112。例如，驱动器产生特定于白光LED的驱动信号以及特定于红光、绿光和蓝光LED的特定色彩驱动信号。光源的LED响应这些驱动信号来产生光，并且光穿过LCD面板102。色彩传感器120检测穿过LCD面板的光，并且响应检测结果产生反馈信号。在图1的实施方案中，色彩传感器输出与红光、绿光和蓝光光谱相关的特定色彩反馈信号。来自色彩传感器的特定色彩反馈信号由控制器122接收，并且被用来调节光源驱动信号以产生具有所期望亮度和色度特征的白光。为了获得具有所期望亮度和色度特征的白光，控制器响应来自色彩传感器的特定色彩反馈信号产生特定色彩控制信号。在一个实施方案中，特定色彩控制信号是通过将来自色彩传感器的特定色彩反馈信号与参考色彩信息相比较而产生的。例如，特定色彩控制信号是依据来自色彩传感器的特定色彩反馈信号与参考色彩信息之间的差值的函数产生的。用于产生特定色彩控制信号的示例性技术将在下面被详细地说明。
由控制器122产生的特定色彩控制信号被提供给驱动器124。该驱动器将特定色彩控制信号转换为特定色彩驱动信号。然后，特定色彩驱动信号被提供给光源104的彩色LED 112。在一个实施方案中，驱动器基于每种色彩来调节驱动信号以产生具有所期望亮度和色度特征的白光。
提供驱动信号、检测所产生的光、产生反馈信号、响应反馈信号调节驱动信号的过程是一个连续的过程。由于该过程的反馈本质，所以尽管发射自光源104的光可能漂移，但是驱动信号的调节可以基于每种色彩被连续进行以维持白光的所期望亮度和色度特征。例如，红光、绿光和蓝光LED 112可以基于每种色彩被调节来提供具有所期望亮度和色度特征的白光。在一个实施方案中，提供所期望的白光包括：当由光源的单独的彩色LED所发射的光漂移时维持所期望的白光。
举例说明，图1中的系统100是基于三色(三原色)RGB的系统。基于将三种色彩进行匹配使得这些色彩通常不能被单独感知，三色系统的有色光可以根据三刺激值来描述。三刺激值表示给定三色系统中用于匹配期望色度所需的三种匹配光的强度。三刺激值可以使用如下的等式来计算：
X = k Σ λ W x λ ‾ R λ
Y = k Σ λ W y λ ‾ R λ
Z = k Σ λ W z λ ‾ R λ
其中
W x λ ‾ = P λ x λ
W y λ ‾ = P λ y λ
W z λ ‾ = P λ z λ
k＝100/∑Wyλ
相对光谱能量分布Pλ是整个光谱上每一恒定间隔波长相对于固定参考值的光谱能量。CIE色彩匹配函数xλ、yλ和zλ是CIE 1931标准色度系统中的函数x(λ)、y(λ)和z(λ)，或CIE 1964补充标准色度系统中的函数x10(λ)、y10(λ)和z10(λ)。CIE 1931标准色度观测器是这样的理想观测器，其色彩匹配性质对应于在1°和4°视野之间的CIE色彩匹配函数，CIE 1964标准色度观测器是这样的理想观测器，其色彩匹配性质对应于大于4°的视野大小的CIE色彩匹配函数。反射比Rλ是在给定圆锥中(其顶点位于所考虑的表面上)被反射的辐射通量与由被照射的完全反射漫射面在相同方向上所反射的通量的比值。辐射通量是以辐射形式发射、传输或接收的能量。辐射通量的单位是瓦特(W)。完全反射漫射面是反射比(或者透射比)单一的理想各向同性漫射面。加权函数Wxλ、Wyλ和Wzλ是相对光谱能量分布Pλ与具体的一组CIE色彩匹配函数的xλ、yλ和zλ的乘积。
图1中所描绘的控制器122可以用许多不同的方法来实现以获得特定色彩控制。图4A和4B描绘了控制器422的实施例，该控制器422可以被用来在图1所描绘的光源中基于每种色彩调节红光、绿光和蓝光LED。参考图4A，控制器422包括参考值发生器430和控制模块432。控制器从色彩传感器120(图1)接收特定色彩反馈信号，该反馈信号是在RGB空间(R、G和B)中所测量的三刺激值的形式。控制器也接收输入参考三刺激值。输入参考三刺激值可以是目标白色点(X ref和Y ref)以及流明值(L ref)形式的。用户可以通过用户接口(未示出)将输入参考三刺激值输入，或者输入参考三刺激值可以以某种其它方式被接收。参考值发生器将输入参考三刺激值转换为RGB空间(R ref、G ref和B ref)中的参考三刺激值。控制模块然后确定所测量的三刺激值与参考三刺激值之间的差值，并且产生这样的特定色彩控制信号，即其反映出为获得期望色彩而需要对驱动信号基于每种色彩进行的调节量。特定色彩控制信号使彩色LED在需要时被调节来发射期望色彩的光。通过这种方法，光源的亮度和色度特征接近所期望的(即，参考的)亮度和色度特征。
图4B的另一种系统400B除了使用CIE 1931三刺激值之外类似于图4A中的系统400A。系统400B包括反馈信号转换器434，该转换器434将在RGB空间中所测量的三刺激值转换为所测量的CIE 1931三刺激值。此外，参考值发生器430将输入参考三刺激值转换为参考CIE 1931三刺激值。然后，控制模块432确定所测量的CIE 1931三刺激值与参考CIE 1931三刺激值之间的差值，并据此调节特定色彩控制信号。
图5描绘了用于操作根据本发明的照明系统的方法的流程图。在框560，驱动信号被提供给包括至少一个磷光体转化型白光LED和多个彩色LED的光源。在框562，响应驱动信号而产生的光被检测。在框564，反馈信号响应所检测的光而被产生。在框566，被提供给光源的驱动信号被调节。
虽然照明系统100被说明为用于LCD面板的背光照明，但是该照明系统可以被用在任何其它照明应用中，并且决不限于用于LCD面板的背光照明。
光谱反馈控制系统106其它这样的实施方案也是可以的，即提供反馈信号并且响应反馈信号基于每种色彩调节彩色LED的光谱反馈控制系统。
虽然已经对本发明特定的实施方案进行了说明和图示，但是本发明并不限于所说明和图示的部件的特定形式或布置。本发明的范围是由本发明所附的权利要求书及其等同物所确定的。

Claims (20)

1.一种照明系统，包括：
光源，所述光源包括至少一个白光发光二极管和多个彩色发光二极管；以及
光谱反馈控制系统，所述光谱反馈控制系统被配置来检测从所述光源输出的光并响应光检测结果来调节从所述光源输出的光。
2.根据权利要求1的照明系统，其中，所述光谱反馈控制系统被配置来基于每种色彩控制所述彩色发光二极管。
3.根据权利要求2的照明系统，其中，所述至少一个白光发光二极管包括至少一个磷光体转化型白光发光二极管，并且其中，所述彩色发光二极管包括红光、绿光和蓝光发光二极管。
4.根据权利要求2的照明系统，其中，所述光谱反馈控制系统还包括色彩传感器，所述色彩传感器被配置来提供特定色彩反馈信号以在基于每种色彩控制彩色发光二极管时使用。
5.根据权利要求4的照明系统，其中，所述至少一个白光发光二极管是磷光体转化型白光发光二极管。
6.根据权利要求1的照明系统，其中，所述光谱反馈控制系统包括控制器，所述控制器被配置来基于每种色彩控制彩色发光二极管以维持从所述光源输出的光的亮度和色度特征。
7.根据权利要求1的照明系统，其中，所述光谱反馈控制系统包括色彩传感器，所述色彩传感器被配置来提供特定色彩反馈信号。
8.根据权利要求7的照明系统，其中，所述光谱反馈控制系统包括控制器，所述控制器被配置来响应所述特定色彩反馈信号产生特定色彩控制信号。
9.根据权利要求8的照明系统，其中，所述光谱反馈控制系统包括驱动器，所述驱动器被配置来响应所述特定色彩控制信号产生特定色彩驱动信号。
10.根据权利要求1的照明系统，其中，所述光谱反馈控制系统包括：
被配置来提供特定色彩反馈信号的色彩传感器；
被配置来响应所述特定色彩反馈信号产生特定色彩控制信号的控制器；以及
被配置来响应所述特定色彩控制信号产生特定色彩驱动信号的驱动器。
11.一种用于操作照明系统的方法，包括：
向光源提供驱动信号，所述光源包括至少一个磷光体转化型白光发光二极管和多个彩色发光二极管；
检测响应所述驱动信号而产生的光；
响应所述被检测的光产生反馈信号；以及
调节被提供给所述光源的所述驱动信号。
12.根据权利要求11的方法，其中，检测所述光包括产生特定色彩反馈信号。
13.根据权利要求12的方法，其中，调节所述驱动信号包括响应所述特定色彩信息基于每种色彩调节用于彩色发光二极管的驱动信号。
14.根据权利要求13的方法，其中，所述用于彩色发光二极管的驱动信号被调节来维持所检测光的亮度和色度特征。
15.一种照明系统，包括：
液晶显示器面板；
与所述液晶显示器面板进行光传递的光源，所述光源包括至少一个磷光体转化型白光发光二极管和多个彩色发光二极管；以及
光谱反馈控制系统，所述光谱反馈控制系统被配置来检测从所述光源输出的光并响应光检测结果来调节从所述光源输出的光。
16.根据权利要求15的照明系统，其中，所述光谱反馈控制系统被配置来基于每种色彩控制所述彩色发光二极管。
17.根据权利要求16的照明系统，其中，所述彩色发光二极管包括红光、绿光和蓝光发光二极管。
18.根据权利要求16的照明系统，其中，所述光谱反馈控制系统还包括色彩传感器，所述色彩传感器被配置来提供特定色彩反馈信号以在基于每种色彩控制彩色发光二极管时使用。
19.根据权利要求15的照明系统，其中，所述光谱反馈控制系统包括控制器，所述控制器被配置来基于每种色彩控制彩色发光二极管以维持从所述光源输出的光的亮度和色度特征。
20.根据权利要求15的照明系统，其中，所述光谱反馈控制系统包括：
被配置来提供特定色彩反馈信号的色彩传感器；
被配置来响应所述特定色彩反馈信号产生特定色彩控制信号的控制器；以及
被配置来响应所述特定色彩控制信号产生特定色彩驱动信号的驱动器。
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