Title |
LCDs are better: Psychophysical and photometric estimates of the temporal characteristics of CRT and LCD monitors
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Published in |
Attention, Perception, & Psychophysics, February 2012
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DOI | 10.3758/s13414-012-0281-4 |
Pubmed ID | |
Authors |
Hayley E. P. Lagroix, Matthew R. Yanko, Thomas M. Spalek |
Abstract |
Many cognitive and perceptual phenomena, such as iconic memory and temporal integration, require brief displays. A critical requirement is that the image not remain visible after its offset. It is commonly believed that liquid crystal displays (LCD) are unsuitable because of their poor temporal response characteristics relative to cathode-ray-tube (CRT) screens. Remarkably, no psychophysical estimates of visible persistence are available to verify this belief. A series of experiments in which white stimuli on a black background produced discernible persistence on CRT but not on LCD screens, during both dark- and light-adapted viewing, falsified this belief. Similar estimates using black stimuli on a white background produced no visible persistence on either screen. That said, photometric measurements are available that seem to confirm the poor temporal characteristics of LCD screens, but they were obtained before recent advances in LCD technology. Using current LCD screens, we obtained photometric estimates of rise time far shorter (1-6 ms) than earlier estimates (20-150 ms), and approaching those of CRTs (<1 ms). We conclude that LCDs are preferable to CRTs when visible persistence is a concern, except when black-on-white displays are used. |
X Demographics
Geographical breakdown
Country | Count | As % |
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United Kingdom | 4 | 44% |
United States | 2 | 22% |
Japan | 1 | 11% |
Unknown | 2 | 22% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 6 | 67% |
Practitioners (doctors, other healthcare professionals) | 2 | 22% |
Scientists | 1 | 11% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Netherlands | 2 | 1% |
United States | 2 | 1% |
Brazil | 2 | 1% |
United Kingdom | 2 | 1% |
Canada | 2 | 1% |
Italy | 1 | <1% |
Belgium | 1 | <1% |
Singapore | 1 | <1% |
Japan | 1 | <1% |
Other | 1 | <1% |
Unknown | 129 | 90% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 34 | 24% |
Researcher | 32 | 22% |
Student > Master | 16 | 11% |
Professor | 11 | 8% |
Student > Postgraduate | 10 | 7% |
Other | 32 | 22% |
Unknown | 9 | 6% |
Readers by discipline | Count | As % |
---|---|---|
Psychology | 80 | 56% |
Neuroscience | 10 | 7% |
Engineering | 9 | 6% |
Agricultural and Biological Sciences | 8 | 6% |
Medicine and Dentistry | 8 | 6% |
Other | 12 | 8% |
Unknown | 17 | 12% |