WO2014043829A1 - 双电流驱动的led灯具结构及其双电流驱动方法 - Google Patents

双电流驱动的led灯具结构及其双电流驱动方法 Download PDF

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Publication number
WO2014043829A1
WO2014043829A1 PCT/CN2012/001298 CN2012001298W WO2014043829A1 WO 2014043829 A1 WO2014043829 A1 WO 2014043829A1 CN 2012001298 W CN2012001298 W CN 2012001298W WO 2014043829 A1 WO2014043829 A1 WO 2014043829A1
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Prior art keywords
current
led lamp
lamp structure
temperature
chipset
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PCT/CN2012/001298
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English (en)
French (fr)
Inventor
陈明鸿
潘敬仁
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海立尔股份有限公司
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Priority to PCT/CN2012/001298 priority Critical patent/WO2014043829A1/zh
Publication of WO2014043829A1 publication Critical patent/WO2014043829A1/zh

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00Safety devices structurally associated with lighting devices
    • F21V25/10Safety devices structurally associated with lighting devices coming into action when lighting device is overloaded, e.g. thermal switch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Definitions

  • the invention relates to an LED lamp structure and a driving method thereof, in particular to a dual current driving LED lamp structure and a dual current driving method thereof. Background technique
  • LED Light Emitter Diode
  • the color temperature of LED lamps is about 5300K, which is cool white light, which can bring a bright feeling and is suitable for working environment.
  • the color temperature of LED lamps is less than 3300K for warm white light, which can bring warmth and relaxation, and is suitable for home environment. Therefore, changes in color temperature directly affect the user's feelings and comfort.
  • the invention relates to a dual current driven LED lamp structure and a dual current driving method thereof.
  • the dual current driven LED luminaire structure includes a COB package, a temperature sensor and a controller.
  • the invention can dynamically adjust the driving current of the red chipset by detecting the working temperature of the red chipset in the COB package, so as to stabilize the color temperature of the LED lamp structure after starting the startup, and avoid the influence of the color temperature variation. Comfort.
  • the present invention provides a dual current driven LED lamp structure, comprising: a COB package having at least one set of blue chip chips driven by a first current; and at least one set of red light chips set by a second a current sensor; a temperature sensor for detecting an operating temperature of the red chipset; and a controller electrically connected to the temperature sensor and dynamically adjusting the second current according to the operating temperature to cause the LED lamp structure
  • the color temperature remains stable.
  • the invention further provides a dual current driving method for an LED lamp structure, wherein the LED lamp structure comprises a COB package body, and at least one set of blue chip chips and at least one set of red light chip sets are disposed in the COB package body, and the dual current driving method comprises The following steps: providing a fixed current for driving the blue chipset; measuring the operating temperature, which is detected by the temperature sensor when the red chipset is working Temperature; and providing a dynamic current to drive the red chipset, the dynamic current is dynamically adjusted by the controller according to the change of the operating temperature, so that the color temperature of the LED lamp structure is stable.
  • 1 is a circuit block diagram showing a structure of a dual current driven LED lamp according to an embodiment of the present invention.
  • 2 is a flow chart of a dual current driving method for an LED lamp structure according to an embodiment of the present invention.
  • 3 is a graph showing the relationship between the operating temperature of an LED lamp structure with a dual current driving method and a correlated color temperature stability factor according to an embodiment of the present invention.
  • FIG. 4 is a diagram showing the relationship between the operating temperature and the normalized lumen attenuation of an LED lamp structure with/without a dual current driving method according to an embodiment of the present invention.
  • FIG. 1 is a circuit block diagram showing a structure of a dual current driven LED lamp according to an embodiment of the present invention.
  • 2 is a flow chart of a dual current driving method for an LED lamp structure according to an embodiment of the present invention.
  • FIG. 3 is a diagram showing the relationship between the operating temperature of an LED lamp structure with a dual current driving method and a correlated color temperature stability factor according to an embodiment of the present invention.
  • 4 is a diagram showing the relationship between the operating temperature and the normalized lumen attenuation of an LED lamp structure with or without a dual current driving method according to an embodiment of the present invention.
  • a dual current driven LED lamp structure 100 includes: a COB package 10, a temperature sensor 20, and a controller 30.
  • the COB package 10 is provided with at least one set of blue chip sets 11 and at least one set of red chip sets 12, and the number of the blue chip sets 11 and the red chip sets 12 may be different. For example, two sets of blue light may be configured.
  • the blue chip chip set 11 and the red light chip set 12 in the COB package 10 are disposed on a substrate or a circuit board, and are electrically connected to the substrate or the circuit board through a wire, and then the blue chip chip set is encapsulated by a phosphor.
  • 11 and the red chipset 12 are all packaged, and when the COB package 10 is driven, the blue light emitted by the blue chipset 11 excites the package with the phosphor, and then the red light emitted by the red chipset 12 is in the COB.
  • the package 10 is mixed with white light.
  • the blue chip chipset 11 is driven by a first current 1, wherein the blue chip chipset 11 can be composed of a plurality of blue light chips connected in series, in parallel or in series and parallel.
  • the first current L is generated by the first current source 13, which is a fixed current, and the magnitude of the fixed current is related to the chip characteristics of the blue chip chipset 11, the number of chips, and the way in which the chips are connected in series.
  • Red chipset 12 which, and the second current 12 is generated by the second current 12 driven by the second current source 14, wherein the red light chip set 12 composed of multiple pieces of red chips in series, parallel, or composition.
  • the temperature sensor 20 is configured to detect the operating temperature of the red chipset 12, and the operating temperature is the ambient temperature at which the red chipset 12 operates.
  • the temperature sensor 20 can be disposed inside the COB package 10 to directly measure the operating temperature of the red chipset 12, or can be disposed outside the COB package 10 and roughly measure the operating temperature of the red chipset 12. Since the direct measurement or the rough measurement of the operating temperature of the red chipset 12 does not have a significant effect on the operation of the present invention, it is not limited to measurement using any of the above methods.
  • the controller 30 is electrically connected to the temperature sensor 20 and the second current source 14. In addition, the controller 30 can also be combined with the temperature sensor 20 to form a combined component, which is then electrically coupled to the second current source 14. Since the color temperature variation of the conventional LED lamp structure is greatly affected by the operating temperature of the red chipset 12, when the red chipset 12 is activated, its operating temperature will fluctuate until a stable state is reached after a certain period of time. Therefore, the color temperature of the conventional LED lamp structure also changes with the operating temperature of the red chip chipset 12, which causes the conventional LED lamp structure to fail to reach a predetermined color temperature immediately, thereby affecting the user's feelings and Comfort.
  • the controller 30 of the embodiment of the present invention can read the operating temperature of the red chipset 12 measured by the temperature sensor 20, and the second according to the operating temperature.
  • the current source 14 is controlled to dynamically adjust the second current 1 2 generated by the second current source 14 to stabilize the operating temperature of the red chipset 12, thereby stabilizing the color temperature of the dual current driven LED lamp structure 100.
  • the second current source 14 is dynamically adjusted to generate the second current 1 2 by multiplying the reference current by a compensation factor to obtain a compensated second current 1 2 to drive the red chip set 12 .
  • the magnitude of the reference current is not affected by the first current I, but is related to the chip characteristics of the red chipset 12, the number of chips, and the chip-serial parallel connection, and the compensation factor is obtained by referring to the operating temperature-compensation factor comparison table.
  • Table 1 it is an operating temperature-compensation factor comparison table of the present embodiment, when the operating temperature is 20 ° C 30. C, 40 o C, 50 o C, 60. C, 70 o C, 80 ° C and 90. C, the corresponding compensation factors are 0.8, 0.85, 0.9, 0.95, 1, 1. 05, 1. 15 and 1. 25, respectively.
  • the controller 30 multiplies the reference current by a compensation factor of 0.85.
  • the second current 1 2 for driving the red chipset 12 is obtained.
  • the same compensation factor can be used continuously, or when the temperature is 40 ° C Compensation factor:
  • the compensation factor of 0.9 is multiplied by the reference current to obtain the second current 1 2 for driving the red chipset 12, and the compensation method is used to adjust the first second current 12 LED lamp structure allows the color temperature remains stable.
  • a dual current driving method S100 for an LED lamp structure includes the following steps: providing a fixed current (step S10); measuring an operating temperature (step S20) and providing a dynamic current driving red chip Group (step S30).
  • the LED lamp structure includes a COB package 10, and at least one set of blue chip sets 11 and at least one set of red chip sets 12 are disposed in the COB package 10.
  • a fixed current is provided (step S10), and the fixed current L is used to drive the blue chipset 11, which is generated by the first current source 13, and the magnitude of the fixed current L is related to the chip characteristics of the blue chipset 11, the number of chips, and the serial-to-chip arrangement. .
  • the operating temperature is measured (step S20), and the temperature of the red chipset 12 is detected by the temperature sensor 20, wherein the operating temperature is the ambient temperature at which the red chipset 12 operates.
  • the temperature sensor 20 can be disposed inside the COB package 10 to directly measure the operating temperature of the red chipset 12, or can be disposed outside the COB package 10 and roughly measure the operation of the red chipset 12. Temperature. Since the direct measurement or the rough measurement of the operating temperature of the red chipset 12 does not have a significant effect on the operation of the present invention, it is not limited to measurement using any of the above methods.
  • a dynamic current driving red chipset is provided (step S30).
  • the red chipset 12 is driven by a reference current at the beginning of the startup, and the magnitude of the reference current is different from the chip characteristics of the red chipset 12, the number of chips, and the serial connection of the chips. related.
  • the controller 30 dynamically adjusts the second current source 14 according to the change of the operating temperature detected by the temperature sensor 20 to generate a dynamic current 1 2 . and dynamic current driving the red chip set 1212, so that the color temperature of the LED lamp structure remains stable.
  • 12 is a product of the dynamic current and the reference current compensation factor group 12 of red chip. As shown in Table 1, the compensation factor is obtained by referring to the operating temperature-compensation factor comparison table.
  • the operating temperature-compensation factor comparison table is at an operating temperature of 20 ° C, 30. C, 40 ° C, 50. C, 60 o C, 70 o C, 80 ° C and 90 ° C, the corresponding compensation factors are 0.8, 0.85, 0.9, 0.9, 0.9, 1, 1. 05, 1 15 and 1. 25.
  • the controller 30 controls the second current source 14 to perform dynamic adjustment, and the dynamic adjustment is
  • the reference current is multiplied by a compensation factor of 0.85 to obtain a dynamic current 1 2 for driving the red chipset 12.
  • the operating temperature is raised to 35 °C, the operating temperature does not change much, so you can continue to use the same compensation factor, or use the compensation factor at 40 °C.
  • the use of compensation shall be multiplied by the factor 0.9 to obtain a color temperature of the reference current for driving a dynamic current red chip group 12 of 12, in order to dynamically adjust the compensation current 12 of the LED lamp structure can be maintained stable.
  • the LED lamp structure using the dual current driving method S100 is compared with the LED lamp structure not using the dual current driving method S100, and the correlated color temperature stability factor of the LED lamp structure using the dual current driving method S100 is at the operating temperature.
  • the temperature is 90 °C
  • the correlation color temperature stability factor of 0.99 is still not changed due to the change of working temperature; but the correlated color temperature stability factor of the LED lamp structure without using the dual current driving method S100 is greatly reduced to 0.
  • CCT Stabiity Factor the correlated color temperature stability factor
  • the LED lamp structure using the dual current driving method S100 is compared with the LED lamp structure not using the dual current driving method S100, and the normalized lumen of the LED lamp structure using the dual current driving method S100 is at the operating temperature. Only 14% attenuation is caused at 90 °C, but the normalized lumens of the LED luminaire structure without the dual current drive method S100 yields a 21% attenuation. It can be seen that the structure of the LED lamp using the dual current driving method S100 is relatively difficult because of the operating temperature. Increase and decay. Therefore, the LED lamp structure using the dual current driving method S100 of the embodiment of the present invention can make the LED lamp structure maintain a good luminous flux even under the condition of an increased operating temperature.
  • the dual current driving method S100 and the LED lamp structure of the LED lamp structure of the embodiment of the invention can reduce the color temperature shifting condition and the luminous flux falling state when the operating temperature is changed, so that the LED lamp structure can be started immediately after the structure is started. It achieves the effect of stable color temperature and stable luminous flux.

Abstract

一种双电流驱动的LED灯具结构及其双电流驱动方法,其中双电流驱动的LED灯具结构(100)包括COB封装体(10)、温度感测器(20)及控制器(30)。COB封装体(10)内设有以第一电流驱动的蓝光芯片组(11),以及以第二电流驱动的红光芯片组(12)。温度感测器(20)侦测红光芯片组(12)的工作温度,且控制器(30)根据工作温度对第二电流进行动态调整以使LED灯具结构(100)的色温保持稳定。本LED灯具结构(100)在开始启动后能随即稳定色温,避免色温的变动影响使用者的舒适度。

Description

双电流驱动的 LED灯具结构及其双电流驱动方法 技术领域
本发明涉及一种 LED灯具结构及其驱动方法, 特别是涉及一种双电流 驱动的 LED灯具结构及其双电流驱动方法。 背景技术
随着发光二极管(Light Emi tt ing Diode, LED)技术的发展, LED已逐 渐成为照明领域的主要元件。 LED灯具的色温高于约 5300K为冷白光, 能带 给人明亮感, 适合用于工作环境。 LED灯具的色温低于 3300K为暖白光, 能 带给人温暖放松感, 适合用于居家环境。 因此, 色温的改变会直接影响使 用者的感受及舒适度。
一般来说, 当 LED开始被启动后, LED灯具的工作温度会开始上升, 过 一阵子后才会趋于稳定。 然而, 已知使用蓝光及红色芯片混光的 LED灯具 容易因为工作温度的改变而导致相关色温偏移(Correlated Color Temperature Deviat ion, CCT Deviat ion)。 经研究, 90%的相关色温不稳、 定性来自于红光芯片。 因此, 有必要探求一种能使具有红光芯片的 LED灯 具在启动后能随即稳定色温的方法及结构, 以提供使用者舒适稳定的 LED 灯具。 发明内容
本发明为一种双电流驱动的 LED灯具结构及其双电流驱动方法。 双电 流驱动的 LED灯具结构包括 COB封装体、 温度感测器及控制器。 本发明可 以借由侦测 COB封装体中红光芯片组的工作温度, 即时动态调整红光芯片 组的驱动电流, 以达到 LED灯具结构在开始启动后能随即稳定色温, 避免 色温的变动影响使用者的舒适度。
本发明提供一种双电流驱动的 LED灯具结构, 其包括: COB封装体, 内 设有至少一组蓝光芯片组,其由第一电流驱动; 及至少一组红光芯片组, 其 由第二电流驱动; 温度感测器, 用以侦测红光芯片组的工作温度; 以及控 制器, 其与温度感测器电性连接, 并依照工作温度对第二电流进行动态调 整以使 LED灯具结构的色温保持稳定。
本发明另提供一种 LED灯具结构的双电流驱动方法, 其中 LED灯具结 构包括 COB封装体, 且 COB封装体内设有至少一组蓝光芯片组及至少一组 红光芯片组, 双电流驱动方法包括下列步骤: 提供固定电流, 其用以驱动 蓝光芯片组; 量测工作温度, 其借由温度感测器侦测红光芯片组工作时的 温度; 以及提供动态电流驱动红光芯片组, 动态电流根据工作温度的变化 由控制器进行动态调整, 以使 LED灯具结构的色温保持稳定。
借由本发明的实施, 至少可达到下列进步功效:
1、 使启动初期的色温维持稳定。
2、 使启动初期的光通量维持稳定。
上述说明仅是本发明技术方案的概述, 为了能够更清楚了解本发明的 技术手段, 而可依照说明书的内容予以实施, 并且为了让本发明的上述和 其他目的、 特征以及优点能够更明显易懂, 以下特举较佳实施例,并配合附 图,详细说明如下。 附图的简要说明
图 1为本发明实施例的一种双电流驱动的 LED灯具结构的电路方块图。 图 2为本发明实施例的一种 LED灯具结构的双电流驱动方法流程图。 图 3为本发明实施例的一种使用 /不使用双电流驱动方法的 LED灯具结 构的工作温度与相关色温稳定因子的关系图。
图 4为本发明实施例的一种使用 /不使用双电流驱动方法的 LED灯具结 构的工作温度与正规化流明衰减的关系图。
【主要元件符号说明】
100 双电流驱动的 LED灯具结构
10 COB封装体
11 蓝光芯片组
12 红光芯片组
13 第一电流源
14 第二电流源
20 温度感测器
30 控制器
L 第一电流 /固定电流
12 第二电流 /动态电流 实现发明的最佳方式
图 1为本发明实施例的一种双电流驱动的 LED灯具结构的电路方块图。 图 2为本发明实施例的一种 LED灯具结构的双电流驱动方法流程图。 图 3 为本发明实施例的一种使用 /不使用双电流驱动方法的 LED灯具结构的工作 温度与相关色温稳定因子的关系图。 图 4为本发明实施例的一种使用 /不使 用双电流驱动方法的 LED灯具结构的工作温度与正规化流明衰减的关系图。 双电流驱动的 LED灯具结构实施例
如图 1所示, 本发明实施例的一种双电流驱动的 LED灯具结构 100包 括: COB封装体 10、 温度感测器 20及控制器 30。
COB封装体 10, 其内设有至少一组蓝光芯片组 11及至少一组红光芯片 组 12, 且蓝光芯片组 11与红光芯片组 12的数量可以不相同, 例如可以配 置有两组蓝光芯片组 11及一组红光芯片组 12 , 但蓝光芯片组 11及红光芯 片组 12的配置方式并不以此为限。
在 COB封装体 10中的蓝光芯片组 11及红光芯片组 12是设置在基板或 电路板上, 并通过导线与基板或电路板电性连接, 接着以具有荧光粉的封 装胶体将蓝光芯片组 11及红光芯片组 12全部封装在内, 而当驱动 COB封 装体 10时, 蓝光芯片组 11发出的蓝光激发具有荧光粉的封装体后, 又与 红光芯片组 12发出的红光在 COB封装体 10中混光成白光。
蓝光芯片组 11由第一电流 1,驱动, 其中蓝光芯片组 11可以由多颗蓝 光芯片串联、 并联或串并联组成。 第一电流 L由第一电流源 13产生, 其为 固定电流, 而固定电流的大小与蓝光芯片组 11的芯片特性、 芯片数量及芯 片串并联方式有关。
红光芯片组 12,其由第二电流 12驱动,且第二电流 12由第二电流源 14 产生, 其中红光芯片组 12可以由多颗红光芯片串联、 并联或串并联组成。
温度感测器 20,用以侦测红光芯片组 12的工作温度, 工作温度即为红 光芯片组 12工作时的环境温度。 温度感测器 20可以设置于 COB封装体 10 内部以直接量测红光芯片组 12的工作温度, 亦可以设置于 COB封装体 10 外部并粗略量测红光芯片组 12的工作温度。 由于直接量测或是粗略量测红 光芯片组 12的工作温度对本发明的操作不会有显著的影响, 故不限于使用 上述的任何一种方式进行量测。
控制器 30, 其与温度感测器 20及第二电流源 14电性连接。 另外, 控 制器 30亦可以与温度感测器 20合并成为组合元件, 组合元件再与第二电 流源 14电性连接。由于现有习知 LED灯具结构的色温变化受红光芯片组 12 的工作温度影响甚巨, 当红光芯片组 12被启动后,其工作温度会产生变动, 直到一段时间后才会达到稳定状态。 因此, 现有习知 LED灯具结构的色温 亦会随着红光芯片组 12的工作温度的变动而改变, 导致现有习知 LED灯具 结构无法马上达到预定的色温, 而影响使用者的感受及舒适度。
为了让红光芯片组 12的工作温度迅速达到稳定, 本发明实施例的控制 器 30可以读取温度感测器 20量测到的红光芯片组 12的工作温度, 并依照 工作温度对第二电流源 14进行控制, 以动态调整第二电流源 14所产生的 第二电流 12, 使红光芯片组 12的工作温度保持稳定, 进而稳定双电流驱动 的 LED灯具结构 100的色温。 上述以动态调整第二电流源 14来产生第二电流 12是将基准电流乘以补 偿因子而得到经补偿调整后的第二电流 12, 以驱动红光芯片组 12。 基准电 流的大小不受第一电流 I,影响, 而是与红光芯片组 12的芯片特性、 芯片数 量及芯片串并联方式有关, 而补偿因子是参照工作温度 -补偿因子对照表而 得。 如表 1所示, 其为本实施例的一种工作温度 -补偿因子对照表, 当工作 温度为 20°C 30。C、 40oC、 50oC、 60。C、 70oC、 80°C及 90。C时, 其相对应的 补偿因子分别为 0. 8、 0. 85、 0. 9、 0. 95、 1、 1. 05、 1. 15及 1. 25。 表 1
Figure imgf000005_0001
举例来说, 假设红光芯片组 12刚被导通时, 温度感测器 20量测到的 工作温度为 30° (:, 则控制器 30便将基准电流乘以 0. 85的补偿因子以得到 用以驱动红光芯片组 12的第二电流 12。 当工作温度提升至 35°C时, 由于工 作温度变动不大, 故可以继续使用相同的补偿因子, 或是采用 40°C时的补 偿因子。 当工作温度提升至 40°C时, 则须采用 0. 9的补偿因子乘以基准电 流以得到用以驱动红光芯片组 12的第二电流 12, 以此补偿方式来调整第二 电流 12可以使 LED灯具结构的色温保持稳定。
LED灯具结构的双电流驱动方法实施例
如图 2所示,本发明实施例的一种 LED灯具结构的双电流驱动方法 S100 包括下列步骤: 提供固定电流(步驟 S10) ; 量测工作温度(步骤 S20)以及提 供动态电流驱动红光芯片组(步骤 S30)。 LED灯具结构包括 COB封装体 10,且 COB封装体 10内设有至少一组蓝光芯片组 11及至少一组红光芯片组 12。
提供固定电流(步骤 S10) , 固定电流 L用以驱动蓝光芯片组 11, 其由 第一电流源 13产生, 且固定电流 L大小与蓝光芯片组 11的芯片特性、 芯 片数量及芯片串并联方式有关。
量测工作温度(步骤 S20) , 其借由温度感测器 20侦测红光芯片组 12 工作时的温度, 其中工作温度即为红光芯片组 12工作时的环境温度。 温度 感测器 20可以设置于 COB封装体 10内部以直接量测红光芯片组 12的工作 温度, 亦可以设置于 COB封装体 10外部并粗略量测红光芯片组 12的工作 温度。 由于直接量测或是粗略量测红光芯片组 12的工作温度对本发明的操 作不会有显著的影响, 故不限于使用上述的任何一种方式进行量测。
提供动态电流驱动红光芯片组(步骤 S30), 红光芯片组 12在启动初期 是先由基准电流驱动, 而基准电流的大小与红光芯片组 12的芯片特性、 芯 片数量及芯片串并联方式有关。当控制器 30读取到的工作温度发生变化时, 控制器 30便 4艮据温度感测器 20侦测到的工作温度的变化对第二电流源 14 进行动态调整以产生动态电流 12, 并以动态电流 12驱动红光芯片组 12, 使 得 LED灯具结构的色温保持稳定。动态电流 12为红光芯片组 12的基准电流 与补偿因子的乘积。 如表 1所示, 补偿因子是参照工作温度-补偿因子对照 表而得。工作温度 -补偿因子对照表为在工作温度为 20°C、 30。C、 40°C, 50。C、 60oC、 70oC、 80°C及 90°C时, 其相对应的补偿因子分别为 0. 8、 0. 85、 0. 9、 0. 95、 1、 1. 05、 1. 15及 1. 25。
举例来说, 假设红光芯片组 12刚被启动时, 温度感测器 20量测到的 工作温度为 30°C, 则控制器 30即控制第二电流源 14进行动态调整, 动态 调整是将基准电流乘以 0. 85的补偿因子以得到用以驱动红光芯片组 12的 动态电流 12。 当工作温度提升至 35°C时, 由于工作温度变动不大, 故可以 继续使用相同的补偿因子, 或是采用 40°C时的补偿因子。 当工作温度提升 至 40。C时, 则须采用 0. 9的补偿因子乘以基准电流以得到用以驱动红光芯 片组 12的动态电流 12,以此补偿方式来调整动态电流 12可以使 LED灯具结 构的色温保持稳定。
如图 3所示, 将使用双电流驱动方法 S100的 LED灯具结构与不使用双 电流驱动方法 S100的 LED灯具结构相比较, 使用双电流驱动方法 S100的 LED灯具结构的相关色温稳定因子在工作温度为 90°C时, 仍维持在 0. 99的 相关色温稳定因子, 较不会因为工作温度的改变而变动; 但不使用双电流 驱动方法 S100的 LED灯具结构的相关色温稳定因子却大幅下降至 0. 83,前 述相关色温稳定因子(CCT Stabi l ity Factor)是将原相关色温(Original CCT)与相关色温偏移(CCT Deviat ion)的差值除以原相关色温而得(CCT Stabi l i ty Factor= (Original CCT-CCT Deviat ion) /Original CCT)。 由于 相关色温稳定因子越大代表 LED灯具结构的色温越能保持稳定, 由此可知 使用本发明实施例的双电流驱动方法 S100的 LED灯具结构确实能大幅减少 LED灯具结构随着工作温度改变色温的状况。
如图 4所示, 将使用双电流驱动方法 S100的 LED灯具结构与不使用双 电流驱动方法 S100的 LED灯具结构相比较, 使用双电流驱动方法 S100的 LED灯具结构的正规化流明在工作温度为 90°C时仅造成 14%的衰减,但不使 用双电流驱动方法 S100的 LED灯具结构的正规化流明却产生了 21%的衰减。 由此可知使用双电流驱动方法 S100的 LED灯具结构较不易因为工作温度的 升高而衰减。 因此使用本发明实施例的双电流驱动方法 S100的 LED灯具结 构, 可使得 LED灯具结构即使在工作温度升高的状况下能仍维持良好的光 通量。
由上述可知, 本发明实施例的 LED灯具结构的双电流驱动方法 S100及 其 LED灯具结构皆能减少工作温度改变时的色温偏移状况及光通量下降状 况, 故可以使 LED灯具结构启动后, 随即达到色温稳定及光通量稳定的功 效。
以上所述, 仅是本发明的较佳实施例而已, 并非对本发明作任何形式 上的限制, 虽然本发明已以较佳实施例揭示如上, 然而并非用以限定本发 明,任何熟悉本专业的技术人员, 在不脱离本发明技术方案范围内,当可利 用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但 凡是未脱离本发明技术方案的内容, 依据本发明的技术实质对以上实施例 所作的任何简单修改、 等同变化与修饰, 均仍属于本发明技术方案的范围 内。

Claims

权 利 要 求
1、 一种双电流驱动的 LED灯具结构, 其特征在于包括:
COB封装体, 内设有至少一组蓝光芯片组, 其由第一电流驱动; 及至 少一组红光芯片组, 其由第二电流驱动;
温度感测器, 用以侦测该红光芯片组的工作温度; 以及
控制器, 其与该温度感测器电性连接, 并依照该工作温度对该第二电 流进行动态调整以使该 LED灯具结构的色温保持稳定。
2、 如权利要求 1所述的 LED灯具结构, 其特征在于其中该蓝光芯片组 由多颗蓝光芯片串联、 并联或串并联组成。
3、 如权利要求 1所述的 LED灯具结构, 其特征在于其中该红光芯片组 由多颗红光芯片串联、 并联或串并联组成。
4、 如权利要求 1所述的 LED灯具结构, 其特征在于其中该第一电流为 固定电流。
5、如权利要求 1所述的 LED灯具结构, 其特征在于其中该第二电流进 行的该动态调整是将基准电流乘以补偿因子而得, 又该补偿因子是参照工 作温度-补偿因子对照表而得。
6、 如权利要求 5所述的 LED灯具结构, 其特征在于其中该工作温度- 补偿因子对照表为在工作温度为 20。 (、 30°C、 40。C、 50°C 60。C、 70。C、 80°C 及 90°C时,其相对应的该补偿因子分别为 0. 8、 0. 85、 0. 9、 0. 95、 1、 1. 05、 1. 15及 1. 25。
7、 一种 LED灯具结构的双电流驱动方法, 其特征在于其中该 LED灯具 结构包括 COB封装体, 且该 COB封装体内设有至少一组蓝光芯片组及至少 一组红光芯片组, 该双电流驱动方法包括下列步骤:
提供固定电流, 其用以驱动该蓝光芯片组;
量测工作温度, 其借由温度感测器侦测该红光芯片组工作时的温度; 以及
提供动态电流驱动该红光芯片组 , 该动态电流根据该工作温度的变化 由控制器进行动态调整, 以使该 LED灯具结构的色温保持稳定。
8、 如权利要求 7所述的汉电流驱动方法, 其特征在于其中该动态电流 为基准电流与补偿因子的乘积, 又该补偿因子是参照工作温度-补偿因子对 照表而得。
9、 如权利要求 8所述的双电流驱动方法, 其特征在于其中该工作温度 -补偿因子对照表为在工作温度为 20°C、 30°C、 40°C、 50。C、 60°C、 70°C、 80°C 及 90°C时,其相对应的该补偿因子分别为 0. 8、 0. 85、 0. 9、 0. 95、 1、 1. 05、 1. 15及 1. 25。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1892365A (zh) * 2005-06-28 2007-01-10 精工电子有限公司 照明装置以及包含该照明装置的显示器
CN1937010A (zh) * 2005-09-21 2007-03-28 Nec液晶技术株式会社 发光装置中使用的光源单元
CN101009080A (zh) * 2006-01-24 2007-08-01 三星电机株式会社 彩色led驱动器
CN101639164A (zh) * 2009-08-21 2010-02-03 中山大学 一种高稳定的增强显色性led光源模块
CN102192424A (zh) * 2010-03-12 2011-09-21 东芝照明技术株式会社 发光装置以及照明装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1892365A (zh) * 2005-06-28 2007-01-10 精工电子有限公司 照明装置以及包含该照明装置的显示器
CN1937010A (zh) * 2005-09-21 2007-03-28 Nec液晶技术株式会社 发光装置中使用的光源单元
CN101009080A (zh) * 2006-01-24 2007-08-01 三星电机株式会社 彩色led驱动器
CN101639164A (zh) * 2009-08-21 2010-02-03 中山大学 一种高稳定的增强显色性led光源模块
CN102192424A (zh) * 2010-03-12 2011-09-21 东芝照明技术株式会社 发光装置以及照明装置

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