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Illumination device and light source control circuit thereof

A light source control and lighting device technology, which is applied in the field of light emitting diode lighting device and its light source control circuit, can solve the problems of increased cost, complex circuit, poor energy efficiency, etc., and achieve the effect of taking into account the overall performance and reducing complexity

Inactive Publication Date: 2014-06-18
OPTROMAX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wiring of the above control circuit would be too complex and increase the cost when applied to a large voltage range
In addition, the brightness of the light source of the light-emitting diode can also be controlled by means of series resistance, but the energy efficiency of this control method is too poor

Method used

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  • Illumination device and light source control circuit thereof
  • Illumination device and light source control circuit thereof
  • Illumination device and light source control circuit thereof

Examples

Experimental program
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Embodiment Construction

[0027] figure 1 It is a schematic circuit diagram of an illuminating device according to an embodiment of the present invention. Please refer to figure 1 , the lighting device 10 includes a plurality of light emitting diodes LD 11 ~LD 1N with LD 21 ~LD 23 , a resistor R D , and a light source control circuit 100. Among them, the light-emitting diode LD 11 ~LD 1N , light emitting diode LD 21 ~LD 23 with resistor R D connected in series with each other at the supply voltage V DD and ground terminal. The light source control circuit 100 is used to control the light emitting diode LD 11 ~LD 1N on-state and by adjusting the light-emitting diode LD 11 ~LD 1N with LD 21 ~LD 23 The number of concatenations between them. In this way, the lighting device 10 can adjust the intensity of the light source emitted by the lighting device 10 through the light source control circuit 100 .

[0028] It is worth mentioning that, in practical applications, light-emitting diodes ...

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PUM

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Abstract

The invention provides an illumination device and a light source control circuit thereof. The light source control circuit is used for controlling N light-emitting diodes which are connected in series, and comprises a current supply unit, a current acquisition unit and N switching units, wherein N is a positive integer; the current supply unit provides N reference currents; the current acquisition unit provides acquisition current, and regulates the magnitude of the acquisition current according to the level of control voltage; each of the N switching units is provided with a transmission path and a current path; the ith switching unit switches own current path or transmission path on according to the acquisition current to transmit the ith reference current to the current acquisition unit or disable the ith light-emitting diode to generate a light source; and i is an integer more than or equal to 1 and less than or equal to N.

Description

technical field [0001] The invention relates to an illuminating device and a light source control circuit thereof, in particular to a light emitting diode illuminating device and a light source control circuit thereof. Background technique [0002] Light Emitting Diodes (LEDs for short) have advantages such as long life, small size, high shock resistance, low heat generation, and low power consumption, so they have been widely used as indicators or light sources in households and various devices. In recent years, light-emitting diodes have developed towards multi-color and high brightness, so their application fields have been extended to large outdoor signage, traffic lights and related fields. In the future, light-emitting diodes may even become the main lighting source with both power saving and environmental protection functions. [0003] Generally speaking, most of the control circuits of LEDs convert the AC voltage into DC voltage or current first, and then use the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 陈国祚
Owner OPTROMAX CORP