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Proceedings Paper

Design of drivers for tiny LCD reticule image generator used for optical measurement
Author(s): Hao Liu; Jiaming Lin; Ruoduan Sun
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Paper Abstract

Replacing some optical vitreous reticules with digital reticule images generated by high-resolution tiny Liquid Crystal Device (LCD) can avoid repeating operations of installing, adjusting and focusing optical vitreous reticules during optical multi-parameter measurement. In this way, optical multi-parameter measurement's efficiency and precision can be enhanced obviously. For this brainchild, we designed an instrument with hardware by utilizing Field Programmable Gate Array (FPGA). The FPGA's main function is to fulfill a XGA signal driving circuit. This circuit generates 'horizontal synchronization signal', 'field synchronization signal' and 'video signal' which can drive the tiny LCD. At the same time, designing device driver programs such as external SRAM memory under embedded Linux operation system is another most important job in software aspect for the apparatus. This apparatus makes high-resolution and high-capacity digital reticule images displaying on tiny LCD accurately and rapidly. This paper mainly introduces the design method and process of 'standard XGA signals driver circuit' and 'device driver programs under embedded Linux'.

Paper Details

Date Published: 27 November 2007
PDF: 6 pages
Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67234F (27 November 2007); doi: 10.1117/12.783636
Show Author Affiliations
Hao Liu, Beijing Institute of Technology (China)
Jiaming Lin, Beijing Institute of Technology (China)
Ruoduan Sun, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 6723:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Junhua Pan; James C. Wyant; Hexin Wang, Editor(s)

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