Development of a light-emitting diode tachistoscope

Thurgood, C; Patterson, J; Simpson, D; Whitfield, TWA

Development of a light-emitting diode tachistoscope

Thurgood, C

Patterson, J Simpson, D Whitfield, TWA

Permalink

Publication Type:: Journal Article
Citation:: Review of Scientific Instruments, 2010, 81 (3)
Issue Date:: 2010-04-14

Closed Access

	Filename	Description	Size
	2013003944OK.pdf		400.55 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Thurgood, C https://orcid.org/0000-0003-3812-4423	en_US
dc.contributor.author	Patterson, J	en_US
dc.contributor.author	Simpson, D	en_US
dc.contributor.author	Whitfield, TWA	en_US
dc.date.issued	2010-04-14	en_US
dc.identifier.citation	Review of Scientific Instruments, 2010, 81 (3)	en_US
dc.identifier.issn	0034-6748	en_US
dc.identifier.uri	http://hdl.handle.net/10453/28399
dc.description.abstract	This paper describes a new method for rapid visual stimulus delivery, the light-emitting diode (LED) tachistoscope. An array of white LEDs provided a luminous intensity greater than 1 000 000 mcd. This array was placed behind a liquid crystal display (LCD) to function as a backlight; switching it on and off determined the visibility of the display. Commands to illuminate for periods from 1 ms to continuously on were relayed from a computer to the LED array. Changes in luminous intensity at the surface of a LED and the LCD were recorded via oscilloscope. The required duration of light pulses consistently matched the durations displayed, with only microsecond discrepancies due to turn-on and turn-off delays. Images were illuminated on the LCD screen for as little as 1 ms, with the amplitude of the luminance consistent across trials. The LED tachistoscope can be used with any computer to display images extremely briefly, potentially at the submillisecond level, providing superior performance to traditional and computer monitor tachistoscopes. © 2010 American Institute of Physics.	en_US
dc.relation.ispartof	Review of Scientific Instruments	en_US
dc.relation.isbasedon	10.1063/1.3327837	en_US
dc.subject.classification	Applied Physics	en_US
dc.title	Development of a light-emitting diode tachistoscope	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	81	en_US
utslib.for	0299 Other Physical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Design, Architecture and Building
pubs.organisational-group	/University of Technology Sydney/Strength - DIRC - Design Innovation Research Centre
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	81	en_US

Abstract:

This paper describes a new method for rapid visual stimulus delivery, the light-emitting diode (LED) tachistoscope. An array of white LEDs provided a luminous intensity greater than 1 000 000 mcd. This array was placed behind a liquid crystal display (LCD) to function as a backlight; switching it on and off determined the visibility of the display. Commands to illuminate for periods from 1 ms to continuously on were relayed from a computer to the LED array. Changes in luminous intensity at the surface of a LED and the LCD were recorded via oscilloscope. The required duration of light pulses consistently matched the durations displayed, with only microsecond discrepancies due to turn-on and turn-off delays. Images were illuminated on the LCD screen for as little as 1 ms, with the amplitude of the luminance consistent across trials. The LED tachistoscope can be used with any computer to display images extremely briefly, potentially at the submillisecond level, providing superior performance to traditional and computer monitor tachistoscopes. © 2010 American Institute of Physics.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/28399