75.4: Evaluation of Human Reactions on Displays with LED Backlight and a Technical Concept of a Circadian Effective Display

Stefani, Oliver; Bues, Matthias; Pross, Achim; Spath, Dieter; Frey, Sylvia R.; Anders, Doreen; Mager, Ralph; Cajochen, Christian

doi:10.1889/1.3499852

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…More specifically, a significant rise in sleep quality was observed as a result of changing the color temperature of screen from color temperature of 6500 kelvins (before the intervention) to 3800 K. Many studies have recently shown that light emitted at night from electronic instruments, especially computer LED monitor, reduces the sleeping period and delays the onset of sleeping and awakening because such a light has short wavelengths. 36-38 Moreover, many studies have shown that filtering the short wavelength light of the computer monitor at night improves sleeping quality and tunes circadian rhythm. 19,20,39 A new study by Ostrin et al showed that the emitted short wavelength light from monitors can play a role in the high prevalence of sleeping disorders.…”

Section: Discussionmentioning

confidence: 99%

The effects of screen light filtering software on cognitive performance and sleep among night workers

Kazemi

Alighanbari

Zamanian

2019

Health Promot Perspect

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Background: Pervious studies have reported impaired performance, sleepiness and sleep deprivation among night workers. The purpose of this study was to investigate the effect of color Screen Light Filtering software on cognitive performance, alertness and sleep quality among night shift operators of a medical emergency operations center. Methods: This field trial interventional study was carried out among 30 nightshift operators of Shiraz emergency control center. The baseline assessments were carried out under the existing computer screen light conditions in the week preceding the installation of f.lux software. The same measurements were repeated again 4 weeks after installing the software. The cognitive performance of the participants was measured using continuous performance test (CPT) and n-back, while their sleep quality was assessed through Pietersburg Sleep Quality Index (PSQI). Further, to assess their subjective and objective alertness, Stanford sleepiness index and go/no go test were used, respectively. Results: The results of this study showed that Screen Light Filtering software significantly increased subjective (P < 0.001) and objective alertness (P < 0.05). Additionally, the performance of the working memory (P = 0.008) and sleep quality (P = 0.008) improved significantly after the intervention. Conclusion: The results revealed that using Screen Light Filtering software is an effective and low-cost method to improve sleep quality and cognitive performance since it filters the short wavelength part of the spectrum and helps body adaptation.

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Section: Discussionmentioning

confidence: 99%

The effects of screen light filtering software on cognitive performance and sleep among night workers

Kazemi

Alighanbari

Zamanian

2019

Health Promot Perspect

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“…This work was partly presented previously (with more technical details and less details about the biological effects) at SID 2010, May 23-28, at the Washington State Convention Center in Seattle, Washington, USA. 26 Less technical details but yet more details about the biological effects can be found in Ref 27.…”

Section: Acknowledgmentmentioning

confidence: 99%

LED‐backlit computer screens influence our biological clock and keep us more awake

et al. 2012

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In commodity LC flat-panel displays, the traditional CCFL backlight is being replaced more and more by LEDs. The typical spectrum of LED-lit displays shows a significantly higher amount of blue light in the range around 464 nm. Blue light in this wavelength area suppresses the melatonin level in humans and thus effects the biological clock. Our hypothesis was that the amount of blue light reaching the human eye from a LED-backlit display is sufficient to have a significant effect on the biological clock. The results of clinical user studies comparing the effects of LED- vs. CCFL-backlit displays on humans, resulting from the emitted amount of 464-nm light, will be presented. It was found that the LED-backlit display causes significant suppression of melatonin, which effects the biological clock of the test persons, indicating the necessity for displays with a controllable 464-nm emission. A technical concept for a display with such functionality will be presented

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11-1:Invited Paper: Convergence of Lighting and Display: Opportunities, Requirements, Challenges

Bues

Stefani

Pross

2016

SID Symposium Digest of Technical Papers

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With LED and OLED taking over the general lighting market, and OLED being the most promising successor technology to LCD with whatever backlight source, both areas have begun to converge. This leads to completely new ways of building and controlling general lighting systems, but also to the possibility (and necessity) to rethink the currently mostly disjunct roles of general lighting and information displays. In the article, we will discuss some of these new possibilities, as well as some of the implications coming with those.

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75.4: Evaluation of Human Reactions on Displays with LED Backlight and a Technical Concept of a Circadian Effective Display

Cited by 4 publications

References 12 publications

The effects of screen light filtering software on cognitive performance and sleep among night workers

The effects of screen light filtering software on cognitive performance and sleep among night workers

LED‐backlit computer screens influence our biological clock and keep us more awake

11-1:Invited Paper: Convergence of Lighting and Display: Opportunities, Requirements, Challenges

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