Study of LED Electronic Writing Screen based on Single Chip

DOI

10.2991/nceece-15.2016.34How to use a DOI?

Keywords

STC89C52; LED Color Dot Matrix; Infrared Phototransistor Light Pen

Abstract

LED display design hardware consists of STC89C52 smallest single-chip system, 32 × 32 dot matrix color display arrays, light pen, buttons, LCD display and other components. Color dot matrix red LED is always working in dimly lit scan status, lit STC89C52 microcontroller use homemade light pen infrared phototransistor to detect light strokes and position the red LED lights, calculate from the ranks of coordinate light pen position, and according to key settings different operating mode to control LED display, enable lit, scratch, reverse display, the screen is cleared, strokes drag, rotate display. Display according to ambient light intensity automatically adjusts the display brightness of the display, within a set time when the light pen is not touching the display or button is not pressed close all display and the system enters hibernation, reduce power consumption, when a key press the system resumes.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - DengJin Wu
PY  - 2015/12
DA  - 2015/12
TI  - Study of LED Electronic Writing Screen based on Single Chip
BT  - Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering
PB  - Atlantis Press
SP  - 171
EP  - 175
SN  - 2352-5401
UR  - https://doi.org/10.2991/nceece-15.2016.34
DO  - 10.2991/nceece-15.2016.34
ID  - Wu2015/12
ER  -