A miniature projecting system for portable devices
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
7787
Date Issued
2010
Author(s)
Abstract
A miniature projecting system with dimension of 20 mm in length, 12 mm in width, and 10 mm in height suitable for mobile devices is presented in this paper. This novel projecting system consists of an optical system with two lenses, a liquid crystal display (LCD) device, a collimating tube, and a 1 W high power light-emitting diode (LED) with wavelength of 525 nm. It projects a clear and bright image of 4.5 cm × 1.3 cm which displays 24 digits onto the palm at a distance of 20 cm in a room with light on. The projector can be fabricated easily at low cost. Miniaturization is achieved in this system so that it can be equipped into thin mobile phones.
SDGs
Type
conference paper