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

Free-form lens with high light emitting efficiency and design method thereof

A technology of curved lens and design method, which is applied in the fields of lens, optics, computing, etc. It can solve the problems of not considering the light output efficiency of the lens, and achieve the effect of simple design method, small loss of light energy and great flexibility

Active Publication Date: 2016-05-25
TIANJIN ZHONGHUAN ELECTRONICS LIGHTING TECH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the free-form surface lens designed by these methods is not designed in conjunction with the minimization of Fresnel energy loss, that is, the light extraction efficiency of the lens is not considered. The design method is particularly important

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
  • Free-form lens with high light emitting efficiency and design method thereof
  • Free-form lens with high light emitting efficiency and design method thereof
  • Free-form lens with high light emitting efficiency and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] S1. In this embodiment, the XOZ plane is selected as the incident surface, the light source is located at the coordinate origin O, and the light distribution curve of the light source, that is, the spatial intensity distribution of light energy of the light source is Lambertian. Divide the light energy emitted by the light source into N=200 equal parts, then each equal part angle θ i Can be given by the formula:

[0054] 2 π ∫ 0 θ i c o s θ s i n θ d θ = i · 2 π N ∫ 0 π / 2 c o s θ s i n θ d θ ...

Embodiment 2

[0066] Repeat embodiment 1 with the same steps as described, the difference is that the difference is that the free-form surface material is PC (polycarbonate) in the present embodiment, the height of the center point of the inner surface 102 is 5mm, and the height of the center point of the outer surface 101 is 8mm; The inner surface 102 has an angular deflection coefficient k=1. The target surface is a circle with a radius of R=200mm, and the distance from the light source to the target surface 100 is L=100mm. Figure 9 It is the topography diagram of the free-form surface lens of the present embodiment, Figure 10 It is the illuminance distribution diagram of the free-form surface lens on the target surface 100 in this embodiment. After calculation, the uniformity of illumination is 0.94, the Fresnel optical loss is 9.8%, and the light extraction efficiency reaches 90.2%.

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 present invention relates to a free-form lens with high light emitting efficiency and a design method thereof. The free-form lens is semicircular. The bottom surface of the free-form lens is a conical recess. The semicircular surface of the free-form lens is an outer surface. The conical recess surface of the free-form lens is an inner surface. Two free-form surfaces are formed by the inner surface and the outer surface. The invention also discloses the design method of the free-form lens. The design method is simple, through the design of the inner and outer surface of the lens at the same time, the specific illumination type can be realized, since the inner and outer surface of the lens are free-form surfaces, the lens shape is optimized, the light energy loss of the lens can be minimized, thus the light emitted by an LED is projected to an illumination plane with high efficiency, since the material of the lens is an optically transparent material commonly used in the industry, the processing cost is low, and the lens is suitable for mass production.

Description

technical field [0001] The invention belongs to the LED packaging technology, and relates to a free-form surface lens with high light extraction efficiency in the LED packaging and a design method thereof, and is especially applied in the LED packaging to improve light efficiency, realize light beam control, and meet different lighting requirements. Background technique [0002] Light Emitting Diode (LED, Light Emitting Diode) is a semiconductor light emitting device based on the principle of electron-hole recombination light emission. It has the advantages of high electro-optic conversion efficiency, long service life, environmental protection and energy saving, and small size. Light sources have been widely used in many fields, and are considered by the industry to be the main development direction of future lighting technology, with huge market potential. [0003] Generally, in high-power white LED packaging, an indispensable part is the optical lens. The function of the...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/02G02B27/00G06F17/50H01L33/58
CPCG02B3/02G02B27/0012G06F30/17H01L33/58
Inventor 李春峰罗小兵谢斌边盾
Owner TIANJIN ZHONGHUAN ELECTRONICS LIGHTING 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