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LED (Light Emitting Diode) lamp capable of adjusting color temperature

A technology of LED lamps and LED lamp beads, which is applied in the layout of electric lamp circuits, lighting devices, light sources, etc., can solve problems such as poor consistency, and achieve the effect of ensuring brightness

Inactive Publication Date: 2013-06-12
深圳市华高芯源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the wavelength will change slightly with the change of the driving current, and the consistency is not very good, resulting in the adjustment of the color temperature and the brightness also changes.

Method used

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  • LED (Light Emitting Diode) lamp capable of adjusting color temperature

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0018] An LED lamp with adjustable color temperature, comprising: an LED bead array 6, a PWM drive module 5, and an MCU3, the PWM drive module 5 is electrically connected to the MCU3, and the MCU3 calculates an LED lamp that maintains constant brightness when adjusting the color temperature The lighting time and current intensity of the bead array 6 are converted into PWM signals and output to the PWM driving module 5 .

[0019] In this embodiment, the lighting time and current intensity of the LED lamp bead array 6 required to maintain a constant brightness when adjusting the color temperature are calculated by the MCU3, and the lighting time and current intensity are converted into PWM signals and sent to the multi-channel PWM drive module 5. The PWM driving module 5 controls the LED lamp to adjus...

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Abstract

The invention discloses an LED (Light Emitting Diode) lamp capable of adjusting color temperature. The LED lamp comprises an LED lamp bead array. The LED lamp is characterized by further comprising a PWM (Pulse Width Modulation) drive module and an MCU (Microprogrammed Controller Unit). The PWM drive module is electrically connected to the MCU. PWM signal parameters which are corresponding to multiple paths of the LED lamp bead arrays are calculated by the MCU under the premise of maintaining a constant brightness when color temperature is adjusted, and the PWM signals are output to the PWM drive module by the MCU. According to the LED lamp provided by the invention, multiple paths of PWM signal parameters which are required for maintaining the constant brightness when the color temperature is adjusted are calculated through an MCU built-in algorithm for color temperature adjustment with the constant brightness. The outputs of the LED lamp bead arrays are adjusted by the PWM drive module by setting the PWM signals. The constant brightness is ensured while the color temperature adjustment is operated for the LED lamp.

Description

technical field [0001] The invention relates to an LED lamp, in particular to an LED lamp with adjustable color temperature. Background technique [0002] The invention of artificial lighting, especially the incandescent lamp, has promoted the rapid development of human society. The development of modern lighting has mainly gone through three stages of development: incandescent lamps, gas discharge lamps, and LED lamps. According to the sequence of product appearance, we call incandescent lamps and gas discharge lamps traditional lighting fixtures. Most of the light parameters of traditional lighting fixtures are fixed, such as brightness and color temperature. Due to the advantages of energy saving, environmental protection and longevity, LED lighting fixtures have been widely used as a new generation of low-carbon lighting products. The LED lighting fixtures that are common in the existing market are basically used as substitutes. LED lighting products basically adopt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 付晓辉付建国
Owner 深圳市华高芯源科技有限公司
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