Humans can undergo circadian disruption and misalignment when living in closed
environments without sufficient daylight. Therefore, it is of great significance to investigate …

A color-temperature tunable white light-emitting diode (LED) based on a newly developed
monolithic color-tunable LED structure was demonstrated. The color-tunable LED structure …

The spectral transmittance of ocular media on the short-wavelength light is higher for young
observers than elders. It is essential to concentrate on the photobiological safety of children …

While artificial lighting significantly impacts occupants' health and productivity in commercial
buildings, current fixed lighting conditions lack the adaptability to real-time occupant status …

Laser-based illuminant has been a topic of increasing interest in recent years and both of
color quality and blue light hazards are the key issues that need to be addressed. In this …

Referring to the standard of International Electrotechnical Commission (IEC), purple and
azure light emitting diodes (LEDs) are used to obtain the blue vision and avoid the blue light …

The blue light hazard (BLH) and luminous efficacy of a source (η V) are associated with the
photobiological safety and energy saving of light-emitting diodes (LEDs), respectively. In this …

Abstract BaBi 2 Nb 2 O 9: Li+/Tm 3+/Er 3+/Yb 3+ phosphors were successfully synthesized
by the high-temperature solid-state method and up-conversion white-light emission has …

The blue-light hazard (BLH) has raised concerns with the increasing applications of white
light-emitting diodes (LEDs). Many researchers believed that the shorter wavelength or more …

We report a new electrically tunable color filter to actively adjust the correlated color
temperature of white light-emitting diodes. With four passive cholesteric films and an active …