Approach for fabricating healthy OLED light sources with visual quality and energy-saving character

Jou, Jwo‐Huei; He, Zhe-Kai; Su, Yu-Ting; Tsai, Ya-Ting; Wu, Chunhua

doi:10.1016/j.orgel.2016.09.005

Cited by 14 publications

(10 citation statements)

References 24 publications

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“…Taking the OLED at 500 lx for example, the admissible times are 369, 153, 70, and 47 seconds at 2,000, 3,000 5,000 and 8,000 K, respectively, which show that the light at 2,000 K is 2, 5 and 7 times safer than those at 3,000, 5,000 and 8,000 K, respectively. [13] These results show that low color temperature or blue hazard free OLEDs are more healthy for human eye when compared with high color temperature OLEDs.…”

Section: Methods Of Quantificationmentioning

confidence: 77%

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P‐145: Blue Light Hazards and Methods of Quantification

Jou

Dubey

Swayamprabhaa

2019

Symp Digest of Tech Papers

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Section: Methods Of Quantificationmentioning

confidence: 77%

“…In contrary, the anti-pseudo-sunlight OLED is 40% more hazardous than the black body radiation style counterpart. [13] Figure 3. Effect of color temperature of natural light style OLED on the MLT suppression sensitivity.…”

Section: Melatonin Suppression Sensitivity Determinationmentioning

confidence: 99%

P‐145: Blue Light Hazards and Methods of Quantification

Jou

Dubey

Swayamprabhaa

2019

Symp Digest of Tech Papers

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“…The melatonin suppression sensitivity (MSS) was presented by Prof. Jou [69,70], which can be calculated by the following formula:…”

Section: Melatonin Suppression Sensitivitymentioning

confidence: 99%

Highly Efficient Candlelight Organic Light-Emitting Diode with a Very Low Color Temperature

et al. 2021

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Low color temperature candlelight organic light-emitting diodes (LEDs) are human and environmentally friendly because of the absence of blue emission that might suppress at night the secretion of melatonin and damage retina upon long exposure. Herein, we demonstrated a lighting device incorporating a phenoxazine-based host material, 3,3-bis(phenoxazin-10-ylmethyl)oxetane (BPMO), with the use of orange-red and yellow phosphorescent dyes to mimic candlelight. The resultant BPMO-based simple structured candlelight organic LED device permitted a maximum exposure limit of 57,700 s, much longer than did a candle (2750 s) or an incandescent bulb (1100 s) at 100 lx. The resulting device showed a color temperature of 1690 K, which is significantly much lower than that of oil lamps (1800 K), candles (1900 K), or incandescent bulbs (2500 K). The device showed a melatonin suppression sensitivity of 1.33%, upon exposure for 1.5 h at night, which is 66% and 88% less than the candle and incandescent bulb, respectively. Its maximum power efficacy is 23.1 lm/W, current efficacy 22.4 cd/A, and external quantum efficiency 10.2%, all much higher than the CBP-based devices. These results encourage a scalable synthesis of novel host materials to design and manufacture high-efficiency candlelight organic LEDs.

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“…Luminaires with lower CCT require increased light levels to meet the circadian metrics and induce alerting effects, which means higher energy use [3,61]. However, many efforts have been dedicated to developing energy-efficient-low-CCT lights to use at night or in spaces where a relaxing effect is required [98]. Saw et al (2020) stated that the problem with research aiming to provide circadian stimulation or healthy lighting is that it ignores the practical side of the optimized designs for commercialization needs.…”

Section: The Effect Of Hcl On Energy Consumptionmentioning

confidence: 99%

Role of Architectural Design in Creating Circadian-Effective Interior Settings

Alkhatatbeh

Asadi

2021

Energies

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Daylight variability throughout the day makes it an ideal light source for the stimulation of humans’ circadian systems. However, the key criteria, including proper quantity, quality, and hours of access to daylight, are not always present inside the built environment. Therefore, artificial light is necessary to complement the human’s visual and non-visual needs for light. Architectural design parameters, such as window area, orientation, glazing material, and surface reflectance alter the characteristics of both daylight and artificial light inside buildings. These parameters and their impact on lighting design should be considered from the early design stages to attain a circadian-effective design. In response to this need, a design approach called Human-Centric Lighting (HCL) was introduced. HCL places humans, and their visual and non-visual needs, in the center of the design process. It manipulates the light-related factors, such as spectrum and intensity, within the built environment for circadian benefits. The effect of HCL on lighting energy efficiency is still not clear. This paper reviews essential architectural design parameters and their impacts on circadian lighting design, considers the HCL design process and explores the most widely used circadian lighting metrics and standards.

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Approach for fabricating healthy OLED light sources with visual quality and energy-saving character

Cited by 14 publications

References 24 publications

P‐145: Blue Light Hazards and Methods of Quantification

P‐145: Blue Light Hazards and Methods of Quantification

Highly Efficient Candlelight Organic Light-Emitting Diode with a Very Low Color Temperature

Role of Architectural Design in Creating Circadian-Effective Interior Settings

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