Proceedings of the 2025 International Conference on Electronics, Electrical and Grid Technology (ICEEGT 2025)

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Analyze of Evolution and Cross-Era Difference of Autofocus Technology in Projectors

Authors
Aihui Wang1, *
1Shanghai Experimental Foreign Language School, Shanghai, 20030, China
*Corresponding author. Email: wangaihui_0215@126.com
Corresponding Author
Aihui Wang
Available Online 18 February 2026.
DOI
10.2991/978-94-6463-986-5_67How to use a DOI?
Keywords
AF; Projector; Performance; Precision; Commercialization
Abstract

The evolution of image projection technology began with shadow play and the camera obscura in the 12th century. It has now led to the development of modern auto-focus (AF) projection systems. This paper analyzes the development and performance of autofocus technologies in three main types of projectors: lamp-based, Light-Emitting Diode (LED), and laser systems. After the commercialization of LED projectors in 2006 and laser projectors in 2010, AF capabilities became necessary for maintaining image quality in varied conditions. Projectors play a crucial role in education, culture, medicine, and industry. They greatly enhance understanding and accessibility. The accuracy and dependability of autofocus systems affect their overall efficiency. This study looks at the operating principles, technical methods, and performance limits of each AF mechanism. It focuses on precision errors and adaptive behaviors. The results show a consistent trade-off between cost, efficiency, and accuracy across the different technologies. This research emphasizes the need for ongoing innovation in AF design. This will help create smart, connected, and user-friendly projection solutions in a wide range of situations.

Copyright
© 2026 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 International Conference on Electronics, Electrical and Grid Technology (ICEEGT 2025)
Series
Advances in Engineering Research
Publication Date
18 February 2026
ISBN
978-94-6463-986-5
ISSN
2352-5401
DOI
10.2991/978-94-6463-986-5_67How to use a DOI?
Copyright
© 2026 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Aihui Wang
PY  - 2026
DA  - 2026/02/18
TI  - Analyze of Evolution and Cross-Era Difference of Autofocus Technology in Projectors
BT  - Proceedings of the 2025 International Conference on Electronics, Electrical and Grid Technology (ICEEGT 2025)
PB  - Atlantis Press
SP  - 649
EP  - 659
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-986-5_67
DO  - 10.2991/978-94-6463-986-5_67
ID  - Wang2026
ER  -