LED mixed lighting system with adjustable color temperature and light modulation method thereof

A lighting system and color temperature technology, applied in lighting devices, electroluminescent light sources, light sources, etc., can solve the problems of limited fitting discrete points, inability to achieve color temperature compensation, inaccuracy, etc., achieve constant color temperature, small color difference, and avoid health problems Harmful effect

Inactive Publication Date: 2017-11-07
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The color temperature compensation method disclosed in the invention patent ZL201510031334.X directly establishes the relationship between the current and the relative color temperature, and the same relative color temperature corresponds to a series of chromaticity coordinate points on the chromaticity diagram, which is not unique. This series of the same color temperature The coordinate points are called "isothermal lines", and it is not accurate to quantify the chromaticity difference with the difference in color temperature
Moreover, the selection of fitting discrete points in the operation process described in this patent is extremely limited, and the calculation method of the mixed color temperature is also extremely rough and imprecise. This series of approximate theoretical basis and approximate operation process will inevitably cause a gap between theoretical expectations and actual conditions There is a large deviation, making it impossible to achieve accurate color temperature compensation
[0005] In addition, the adjustment of light intensity in the existing LED dimming process has not taken into account the human eye's perception of light intensity, that is, the relationship between "brightness" and the objective brightness measured by measuring equipment. Adjustment based on objective brightness

Method used

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  • LED mixed lighting system with adjustable color temperature and light modulation method thereof
  • LED mixed lighting system with adjustable color temperature and light modulation method thereof
  • LED mixed lighting system with adjustable color temperature and light modulation method thereof

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Experimental program
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Embodiment 1

[0053] Such as figure 1 As shown, this embodiment discloses an LED mixed light lighting system with adjustable color temperature, which includes: LED dimming controller 1, micro-processing system 2, DC driver group 3, multiple groups of LEDs 4, the LED dimming The controller 1 is used to input a dimming signal, and the dimming signal includes a color temperature setting signal and a brightness level setting signal; the micro-processing system 2 receives the dimming signal input by the LED dimming controller, and the micro-processing system 2 The processing system 2 processes the dimming signal to obtain the current control signal of each LED group; the DC driver group 3 receives the current control signal of each LED group from the micro-processing system 2, and generates the DC current signal of each LED group , the DC driver group directly drives each group of LED4; multiple groups of LED4 are driven by the DC driver group to emit light, and mix to produce a lighting effect ...

Embodiment 2

[0055] Such as figure 2 As shown, a dimming method is disclosed in Embodiment 2, comprising the following steps:

[0056] S1 sets the color temperature and brightness level of the lighting system, and enters the next step;

[0057] After receiving the setting signal, the S2 micro-processing system finds out the current value driven by each group of LEDs according to the look-up table, generates a current control signal, and enters the next step;

[0058] S3 After receiving the current control signal, each group of DC drivers generates a corresponding driving current, drives each group of LEDs to emit light, and enters the next step;

[0059] Each group of S4 LED emits light to form a mixed light effect to meet the corresponding lighting requirements.

[0060] In this embodiment, specifically,

[0061] Such as image 3 as shown, figure 2 The process of obtaining the lookup table involved in step S2 in the flowchart is as follows, and the steps include:

[0062] S201 res...

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Abstract

The invention discloses a color temperature adjustable LED mixed lighting light modulation method comprising the following steps: S1, setting the color temperature and lightness level of the lighting system, and entering the next step; S2, searching various LED driving current values according to a searching table when a micro-processing system receives a set signal, forming a current control signal, and entering the next step; S3, allowing all DC drivers to form corresponding driving currents after receiving the current control signal, driving all LEDs to illuminate, and entering the next step; S4, allowing all LEDs to light up so as to form the mixed lighting effect, and reaching corresponding illumination demands. The system uses more than two LEDs of different color temperatures to mix the lights, thus providing color temperature adjustable effect and the relative constant color temperatures in the LED light intensity adjusting scope, and dividing the light intensity adjusting grades according to the human eye perception (lightness) on the light intensity.

Description

technical field [0001] The invention relates to the field of LED intelligent dimming, in particular to an LED mixed light lighting system with adjustable color temperature and a dimming method thereof. Background technique [0002] Due to its high luminous efficiency, long service life, safety and reliability, LED lighting has gradually replaced traditional lighting in recent years and has been widely used and promoted in various applications. Various researches to improve its performance are also getting more and more in-depth. The dimming of LED lighting system is an important direction of research. At present, the main dimming methods of LED lighting include pulse width modulation (PWM) and linear regulation. PWM controls the brightness by controlling the duty cycle of the high-frequency on-off current. This method can achieve the purpose of precise adjustment, but there is a flicker problem that is not detectable by the human eye, and there are potential health risks. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 夏振平程成
Owner SUZHOU UNIV OF SCI & TECH
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