LED lighting apparatus and dimming method thereof

A technology of light-emitting diodes and lighting devices, applied in the field of lighting circuits and lighting devices with them

Inactive Publication Date: 2013-08-14
LEXTAR ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mainstream light source has already indicated its specified color temperature and brightness when purchasing, so the switch function can only be used to control the light source to be fully bright or fully dark

Method used

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  • LED lighting apparatus and dimming method thereof
  • LED lighting apparatus and dimming method thereof
  • LED lighting apparatus and dimming method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] figure 2 It is a circuit block diagram of the LED lighting device according to the first embodiment of the present invention. Please refer to figure 2 , the LED lighting device includes a first light emitting unit 201 , a second light emitting unit 202 , a driving unit 203 and a detection unit 204 . In order to illustrate the spirit of the present invention, the above-mentioned circuit also shows a power switch 205, and this power switch 205 represents the light switch on the wall of the general user's home. Both the first light emitting unit 201 and the second light emitting unit 202 are implemented by light emitting diodes. The difference is that the light emitting diodes used in the first light emitting unit 201 and the second light emitting unit 202 are light emitting units with different color temperatures. The first light emitting unit 201 emits, for example, a color temperature of 6000K (cool color temperature), and the second light emitting unit 202 emits, ...

no. 2 example

[0064] Figure 4 It is a more detailed circuit block diagram of the LED lighting device according to the second embodiment of the present invention. Please refer to Figure 4 The part of this light-emitting diode lighting device that is the same as that of the above-mentioned first embodiment includes a first light-emitting unit 201, a second light-emitting unit 202, a drive unit 203, a detection unit 204, and a power switch 205. The difference is that The detailed circuit of the detection unit 204 includes a step-down circuit 401, a control unit 402 and a storage unit 403, wherein the control unit 402 also includes a pulse circuit 402-1, a clock counting unit 402-2 and A pulse width control unit 402-3. The step-down circuit 401 is coupled to the working power via the power switch 205 . The control unit 402 is coupled to the step-down circuit 401 and the driving unit 203 . The control unit 402 counts the time that the power switch 205 is turned on according to the output v...

no. 3 example

[0071] For the same reason, although the above-mentioned embodiments only illustrate the method and circuit for adjusting the color temperature, the circuit or method can still be applied in the field of adjusting brightness. Hereinafter, the third embodiment is used to describe how to adjust the brightness in the present invention.

[0072] Image 6 It is a circuit block diagram of the LED lighting device according to the third embodiment of the present invention. Please refer to Image 6 , the LED lighting device includes a light emitting unit 601 , a driving unit 602 and a detection unit 603 . In order to illustrate the spirit of the present invention, the above-mentioned circuit also shows a power switch 604, and this power switch 604 represents the lamp switch on the wall of a general user's home. The above light emitting unit 601 is implemented by light emitting diodes.

[0073]The detection unit 603 is used for detecting the state of the power switch 604 . When the...

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PUM

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Abstract

An LED lighting apparatus and a dimming method thereof are disclosed. The LED lighting apparatus is coupled to a power source through a power switch (205). The method includes providing a first lighting unit (201) and a second lighting unit (202); detecting whether or not the power switch (205) has been turned on; and gradually adjusting a light mixing ratio between the first lighting unit (201) and the second lighting unit (202) according to a turn-on duration of the power switch (205) and storing a color temperature value, accordingly.

Description

technical field [0001] The present invention relates to a lighting device, and in particular to a dimmable lighting circuit and a lighting device having the same. Background technique [0002] Due to the progress of human civilization, lighting devices have become an indispensable item in daily life. In the early days, lighting devices were generally incandescent bulbs (tungsten bulbs). Therefore, in the past, if you want to adjust the light of the lighting device, you only need to set a variable resistor knob between the plug and the lamp, and adjust the variable resistor. Dimming is performed. However, the incandescent light bulb has disadvantages of heat generation, short life, low luminous efficiency, and large power consumption. [0003] Because LED (Light Emitting Diode) has the advantages of high luminous efficiency, long service life, not easy to damage, low power consumption, environmental protection and small size, under the trend of environmental protection and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/0863H05B45/20H05B47/185
Inventor 陈俊光吴孟斋陈柏燊林凤玲陈慧瑛
Owner LEXTAR ELECTRONICS CORP
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