Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for correcting light mixing deviation of multi-chip LED to achieve accurate light distribution of any color

An LED light source, multi-chip technology, used in special data processing applications, design optimization/simulation, etc., can solve problems such as poor accuracy, floating error, inability to copy and use, and achieve simple implementation, high light distribution accuracy, and improved color. Domain-wide effects

Pending Publication Date: 2021-08-06
NANJING UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The establishment of this relationship can refer to the principle of light color theory. Although this principle has a calculation formula for reference, the error fluctuates greatly and the accuracy is poor, so it cannot be copied and used in actual light distribution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for correcting light mixing deviation of multi-chip LED to achieve accurate light distribution of any color
  • Method for correcting light mixing deviation of multi-chip LED to achieve accurate light distribution of any color
  • Method for correcting light mixing deviation of multi-chip LED to achieve accurate light distribution of any color

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, RGB three-primary color chips are used as the basis for light distribution of any color LED light source, and the luminous flux φ is used as the light parameter index of light distribution, and the light source structure is specified as COB type. Connect in series or in parallel. When specifying the total luminous flux of any target color light source as Q and the color coordinates as (x, y), the RGB chip can be driven to obtain the required light source by the following method, such as figure 1 shown.

[0038] Suppose the color coordinates of the white light to be formulated are W(Xw, Yw), and the color coordinates of the three primary colors R, G, and B used are R(Xr, Yr), G(Xg, Yg), B(Xb, Yb), respectively. The tristimulus values ​​are (Xw, Yw, Zw), (Xr, Yr, Zr), (Xg, Yg, Zg), (Xb, Yb, Zb), and the luminous fluxes are lw, lr, lg, lb. According to Grassmann's color mixing law and the 1931 International Commission on Illumination and Illumination (...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for correcting light mixing deviation of a multi-chip LED to achieve accurate light distribution of any color. The method is characterized in that a color coordinate is used as a standard to represent the color of a light source, the color is obtained through multi-chip LED mixing, according to the Grassmann color mixing principle, the optical reference of each color under the target color coordinate is obtained, and the luminous flux is used as a correction parameter. The RGB-LED is taken as an example, light mixing is carried out on light fluxes of R-LED, G-LED and B-LED chips under different input currents, then color coordinates obtained through light mixing serve as target color coordinates, and the theoretical light fluxes (serving as light fluxes after light mixing) of the required RGB three-primary-color chips are calculated through a theoretical light distribution formula. The light mixing deviation of a single LED chip when the three-primary-color chips are mutually mixed is fit by using multiple linear regression analysis to obtain a light mixing deviation formula. The corrected mixed light color coordinates are consistent with the target light color coordinates, and the error range is controlled within (+ / -0.003, + / -0.003). The method is simple and convenient, and can be applied to the application fields of precise illumination, full-color illumination and dynamic illumination.

Description

technical field [0001] The invention relates to a method for correcting light mixing deviation of multi-chip LEDs to realize accurate light distribution of arbitrary colors, which belongs to the field of semiconductor lighting. Background technique [0002] Light Emitting Diode (Light Emitting Diode), as the fourth-generation lighting source, has been widely researched and applied due to its excellent energy saving, environmental protection, long life, low cost, and small size. The existing lighting sources on the market are mainly LED light sources, and the color of LED lighting sources is relatively monotonous, mainly white light color temperature range or single-color lighting light source, and its technology is relatively mature. Among them, the mainstream white light lighting technology route It is mainly realized by exciting yellow phosphor powder with LED blue light chips, and its application scenarios are mainly concentrated in functional lighting; while the applicat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 王海波尤宇财童嘉俊卓宁泽谢琳艳蒋腾
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com