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

A technology of a light source drive circuit and a dimming controller, which is applied in the field of light sources, can solve problems such as the inability of users to adjust the brightness, and achieve the effects of improving energy utilization efficiency and improving dimming stability

Inactive Publication Date: 2014-02-12
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the disadvantages of this traditional solution is that the desired brightness is preset, and the user cannot adjust the brightness during use.

Method used

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

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Embodiment Construction

[0039] 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.

[0040] 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.

[0041] image 3Shown is a schematic diagram of a light source driving circuit 300 according to an embodiment of the...

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Abstract

The invention discloses a dimming controller, a light source driving circuit and a method for controlling dimming of a light source. The dimming controller can include a voltage control terminal and a high voltage terminal. The voltage control terminal provides a driving signal which controls a control switch connected with a first lighting element. When the dimming controller operates in a first mode, the driving signal controls the control switch to operate in either a first state or a second state, such that a first current flowing through the first lighting element is adjusted to a target current value. When the dimming controller operates in a second mode, the driving signal controls the control switch to operate in the second state to cut off the first current. The high voltage terminal is coupled to the voltage control terminal, and connected with the second lighting element by a control circuit. When the dimming controller operated in the second mode, the high voltage terminal conducts a current flowing through the control circuit and the second lighting element to turn on the second lighting element. The invention achieves a relatively wide range of dimming for the LED light source, thereby increasing the energy utilization efficiency and improving the dimming stability of the LED light source.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a dimming controller, a light source driving circuit and a method for controlling dimming of a light source. Background technique [0002] In recent years, new light sources such as light-emitting diodes (LEDs) have made progress in both 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 is used to convert the DC input voltage Vin into a desired DC output voltage Vout for powering the LED chain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCY02B20/347H05B33/0851Y02B20/345H05B45/10
Inventor 林风雷会友郭清泉
Owner AOTU ELECTRONICS WUHAN
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