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Method for reducing light attenuation of LED (light-emitting diode) illuminating light sources in matrix combination

A technology of LED lighting and LED lamps, applied in light sources, electric light sources, lighting devices, etc., can solve problems such as unbalanced working current, reduce overall light decay, solve the problem of working current balance, and maximize light efficiency.

Inactive Publication Date: 2013-05-29
西安明泰半导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for reducing the light attenuation of matrix combined LED lighting sources, which solves the problem of unbalanced working current of each string in the existing LED light source matrix

Method used

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  • Method for reducing light attenuation of LED (light-emitting diode) illuminating light sources in matrix combination
  • Method for reducing light attenuation of LED (light-emitting diode) illuminating light sources in matrix combination
  • Method for reducing light attenuation of LED (light-emitting diode) illuminating light sources in matrix combination

Examples

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Effect test

Embodiment 1

[0042] The total power of the street light source is W=100W, and the light source matrix is ​​composed of P=1W-3W general-purpose LEDs. Wait for the installation and production process, take N=42, Q can be less than or equal to 100, take Q=84 (equivalent to each working at 1.2W), M=2, then the 100W matrix is ​​a 42 series×2 parallel structure, see Image 6 .

Embodiment 2

[0044] The total power of the street light source W=16W-18W T-tube, the light source matrix is ​​composed of 20mA (P=0.06W) LEDs packaged in 3528 (or 3410), and the VF classification accuracy is considered to be 0.25V, then the series connection Number N≥25, Q=18÷0.06=about 300, combined with the installation and manufacturing process, Q=288, N=32 / 36 / 48, then M=9 / 8 / 6 And, then, the T tube can be combined with 288 3528 (or 3410) surface-mount LEDs in three ways: 32 strings and 9 parallels, or 36 strings×8 parallels, or 48 strings×6 parallels. Figure 7 It is the 36 series×8 parallel matrix mode.

Embodiment 3

[0046] The total power of the street light source is W=50W, using 20mA (P=0.06W) 5mm in-line high-brightness LED combination, considering the margin of VF binning accuracy, ΔVF is 0.3V, and the number of series N≥30, combined with installation and production Process, take N=48 pieces, Q=50÷0.06=830 pieces, M=18, Q=864 pieces, if the light effect is not enough, M=19, Q=912 pieces, the 50W light source can use 864 / 912 pieces of 5mm in-line high-brightness LEDs are arranged in a matrix of 48 strings × 18 / 19. Figure 8 It is the 48 series×19 parallel matrix mode.

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Abstract

The invention discloses a method for reducing light attenuation of LED (light-emitting diode) illuminating light sources in matrix combination, which is used for determining in-series number N, in-parallel number M and total number Q in an in-series and in-parallel combination structure of the LED illuminating light source matrix. The method comprises the steps of: step 1, calculating the total number Q of LED lamps by the total power W of the needed light source and the power P of single used LED, wherein Q is equal to W / P; step 2, determining the lowest in-series number N in the light source matrix, wherein N is more than or equal to deltaVF / 0.01, and if N is more than Q, the whole matrix is formed by one string, and N is equal to Q; step 3, calculating the in-parallel number M of the matrixes, wherein M is equal to Q / N; and step 4, implementing the matrix combination of LED light sources according to the determined values of in-series number N, in-parallel number M and the total number Q. In the method disclosed by the invention, the problem of equalization of all strings of working current in an LED light source matrix is solved obviously and effectively, the maximization of whole light effect is realized, the whole light attenuation is greatly reduced, and the effective service life of more than 50,000 hours of the LED is really realized.

Description

technical field [0001] The invention belongs to the technical field of LED semiconductor solid-state lighting, and relates to a method for reducing light attenuation of matrix-combined LED lighting sources. Background technique [0002] The light source of high-power LED lamps cannot be provided by a single LED lamp. It is necessary to combine several LEDs in a matrix according to the requirements of luminous power to achieve unequal light source power and meet the lighting needs of various occasions. The basic unit LED lights can use 1W high-power LEDs, or 20mA low-power LEDs; the matrix form can be assembled by discrete LEDs, or an integrated combination of chip-level LEDs. After basically solving the problem of LED heat dissipation, people found that the light decay of LED lamps has not been completely solved. What other factors affect the light decay of LEDs? For LED, even if it is the same batch and the same chip (wafer), its forward voltage drop VF under the rated cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/42
Inventor 邢先锋刘义芳王清平李志强
Owner 西安明泰半导体科技有限公司