Dimming device for light-emitting diode lamps with graded dimming

A technology of light-emitting diodes and dimming devices, which is applied in the direction of electroluminescent light sources, lighting devices, electric lamp circuit layout, etc., can solve the problem that fluorescent lamp ballasts cannot directly use LED lamps, and achieve the effect of convenient promotion

Inactive Publication Date: 2011-11-30
MASS TECH (HK) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this fluorescent lamp ballast cannot be directly used for LED lamps
[0006] In addition, in the existing technology, there is no scheme for dimming LEDs by using ordinary power switches.

Method used

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  • Dimming device for light-emitting diode lamps with graded dimming
  • Dimming device for light-emitting diode lamps with graded dimming
  • Dimming device for light-emitting diode lamps with graded dimming

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Embodiment Construction

[0022] There are usually two ways to control the brightness of a single LED: one method is to use the visual inertia of the human eye to achieve grayscale control with pulse width modulation, that is, to periodically change the LED light-emitting pulse width (that is, the duty cycle), as long as The period of this repeated lighting is short enough (that is, the refresh rate is high enough), and human eyes cannot perceive the flickering of the light-emitting element. Since pulse width modulation is more suitable for digital control, microcomputers are generally used to provide driving signals for LED displays. For example, almost all LED displays use pulse width modulation to control gray levels; The current, that is, by controlling the output current of the LED lamp power supply, adjust the brightness of the LED lamp. Except for the saturation phenomenon of red LEDs, the brightness of other color LEDs is basically proportional to the current flowing.

[0023] In order to real...

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PUM

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Abstract

The invention relates to a novel dimming device for LED lamps, which can adjust the dimming of LED lamps in stages through a power switch, and the LED lamps can be cyclically changed according to a predetermined program and work in multiple working states. The LED lamp dimming device of the present invention solves the technical problem of dimming with common switches, and can use common switches to dim LEDs in stages. In addition, the present invention can also use an external DC signal source to perform step-by-step dimming of LEDs. According to the present invention, people can adjust the brightness of the LED lamp according to needs, which not only facilitates people's life but also effectively saves energy.

Description

technical field [0001] The invention relates to the field of light-emitting diode (LED) lighting, in particular to a dimming device for a graded dimming LED lamp. Background technique [0002] With the development of science and technology, semiconductor lighting has been widely used in various fields, especially high-power LED lights, due to its characteristics of energy saving, environmental protection, and long life. During the use of LED lights, sometimes the light will be too strong or too dark to affect the lighting effect, and it needs to be dimmed. The lighting brightness of current LED lamps is mostly fixed. Although there are some dimming systems, the existing dimming systems are usually complicated and expensive, so they cannot meet the needs of various application environments. [0003] Japanese patent application JP 2007207734A discloses a dimmable LED lamp, wherein a plurality of LEDs are connected to the output of an A / D converter and / or the output of a circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/0848H05B33/0815Y02B20/40H05B37/0209Y02B20/346H05B45/14H05B47/185Y02B20/30H05B45/385H05B45/30
Inventor 胡安华
Owner MASS TECH (HK) LTD
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