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Control circuit and method for regulating color temperature or luminance of LED

A control circuit and control method technology, applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of low integration, high cost, complex structure of brightness adjustment circuit, etc., and achieve flexible operation, simple operation, and control method simple and efficient effect

Active Publication Date: 2017-01-04
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a control circuit and method for adjusting LED color temperature or brightness, which is used to solve the problem of complex structure, low integration and low cost of LED color temperature and brightness adjustment circuits in the prior art. advanced questions

Method used

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  • Control circuit and method for regulating color temperature or luminance of LED
  • Control circuit and method for regulating color temperature or luminance of LED
  • Control circuit and method for regulating color temperature or luminance of LED

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Embodiment 1

[0060] Such as Figure 2 ~ Figure 3 As shown, the present invention provides a control circuit 2 for adjusting LED color temperature or brightness, and the control circuit 2 for adjusting LED color temperature or brightness at least includes:

[0061] A power supply module 21, a sampling module 22, a main LED branch and at least one slave LED branch.

[0062] The power module 21 is used to provide the input voltage V IN ;

[0063] The sampling module 22 is connected to both ends of the power supply module 21 for measuring the input voltage V IN to sample;

[0064] The main LED branch and the slave LED branch are connected in parallel to the output end of the power module 21 as a load;

[0065] The main LED branch circuit includes a series connected main LED module LED1 and a main driving module 23, the main driving module 23 is connected to the output end of the sampling module 22, and is used to adjust the The color temperature or brightness of the main LED module;

[0...

Embodiment 2

[0092] Such as Figure 5 As shown, the present invention provides a segmented linear LED color temperature or brightness control circuit, the segmented linear LED color temperature or brightness control circuit is consistent with the control circuit structure of Embodiment 1, the difference lies in the The LED module is a linear segmented LED, and the drive module includes multiple constant current control terminals, which respectively control the constant current, color temperature and brightness of each segment of the LED. In this embodiment, two driving modules are used to realize the function of color temperature or brightness, and the system structure is simple. The working principle of the control circuit for adjusting the color temperature or brightness of the segmented linear LED in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

[0093] The control circuit and method for adjusting LED color temperature or brightness of the present...

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Abstract

The invention provides a control circuit and method for regulating a color temperature or luminance of an LED. The control circuit at least comprises a power supply module for providing an input voltage, a sampling module for sampling the input voltage, a primary driving module for regulating the color temperature or the luminance of a primary LED module according to a sampling value output by the sampling module, and multiple secondary driving modules for regulating the color temperatures or the luminance of multiple secondary LED modules according to a state control signal output by the primary driving module. According to the control circuit, the input voltage is directly sampled; when the sampling voltage is less than a set value for a certain time, the color temperature or the luminance state is changed, and each temperature or the luminance state is changed circularly; and after the switched-off driving module is re-started, it defaults that the state is changed circularly. The power supply switch is reliable in the detection function; an extra control and auxiliary power supply unit is not required; the control method is simple and efficient; the state control signal uses a middle state of high and low electric levels, so that a complex digital logic circuit can be avoided; and in addition, a low-power-consumption mode is designed for each driving module.

Description

technical field [0001] The invention relates to the field of LED control, in particular to a control circuit and method for adjusting LED color temperature or brightness. Background technique [0002] LED (Light Emitting Diode, light-emitting diode) has been widely used in indicator lights, displays and lighting fields due to its advantages such as high efficiency, long life, unbreakable, high switching speed, and high reliability that traditional light sources cannot match. LED is a semiconductor device that works under low-voltage DC conditions, and needs to be controlled by a driver module to meet lighting applications. [0003] Commonly used LED modules are mostly monochrome modules, which are used as LED light sources and mostly emit monochrome light. When lighting with different color temperatures such as cool white, warm white, and sunlight, it is necessary to configure LED lamps made of LED modules with different color temperatures. trouble. Color temperature is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 吴泉清刘军尤勇李国成盛欢俞秀峰罗丙寅王雷一许林海任会远王玲祝超王玉洁
Owner CRM ICBG (WUXI) CO LTD
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