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Dimming controller for controlling power of a light source, light driving circuit and method

A dimming controller and driving circuit technology, which is applied in the field of light source driving circuit and power control of light source, can solve problems such as cost increase, and achieve the effect of avoiding sudden changes in brightness and comfortable user experience

Inactive Publication Date: 2013-02-13
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional LED drive circuit 200 needs to use some special device, such as a specially designed switch with an adjustment button or a switch that can receive remote control signals, to adjust the brightness of the LED chain 106, thus causing an increase in cost.

Method used

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  • Dimming controller for controlling power of a light source, light driving circuit and method
  • Dimming controller for controlling power of a light source, light driving circuit and method
  • Dimming controller for controlling power of a light source, light driving circuit and method

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Embodiment Construction

[0027] Detailed reference will be given below to examples of the present invention. Although the present invention has been illustrated and illustrated by these embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, the invention covers all alternatives, modifications and equivalents which are within the spirit and scope of the invention as defined by the appended claims.

[0028] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the gist of the present invention.

[0029] image 3 Shown is a schematic diagram of a light source driving circuit 300 according to an embodiment of th...

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Abstract

A dimming controller for controlling power of a light source has a monitoring terminal, a dimming terminal, and a control terminal. The monitoring terminal is operable for receiving a current monitoring signal indicating a current flowing through the light source. The dimming terminal is operable for receiving a ramp signal. The voltage of the ramp signal increases if a power switch coupled between a power source and the light source is turned on. The control terminal is operable for providing a control signal to control a control switch coupled in series with the light source based on the current monitoring signal and the ramp signal. An average current of the light source increases as the ramp signal increases until the average current reaches a predetermined level.

Description

technical field [0001] The invention relates to a dimming controller, a light source driving circuit comprising the dimming controller and a method for controlling electric energy of a light source. Background technique [0002] In recent years, new light sources such as light-emitting diodes (LEDs) have advanced both in materials and manufacturing. LED has the characteristics of high efficiency, long life, bright colors, etc., and can be used in the fields of automobiles, computers, communications, military and daily necessities. For example, LED lamps can replace traditional incandescent lamps as lighting sources. [0003] figure 1 Shown is a schematic diagram of a conventional LED driving circuit 100 . LED driver circuit 100 utilizes LED chain 106 as a light source. LED chain 106 includes a plurality of LEDs connected in series. The power converter 102 converts the DC input voltage Vin to a desired DC output voltage Vout for powering the LED chain 106 . A switch 104...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/0818H05B33/0848H05B33/0851H05B45/14H05B45/325H05B45/10H05B45/375
Inventor 郭清泉林永霖
Owner AOTU ELECTRONICS WUHAN
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