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Communication boards are large enough to contain several displays and allow teams of people to view at once. This supports team decision making and promotes a "shared vision". [3] A visual control group is intended to actually control or guide the action of the group members.
The use of artificial light as the sole source of light or mixing artificial and daylight might cause ill-health effects, both physical and mental, such as eye strain, headaches, or fatigue. The standards address the types of light that negatively affect vision, angles of light in different environments, illumination standards per square meter ...
Localized lighting consists of a luminaire that provides ambient light as well as task light. Often it is an uplighter with a light source that is directed downward. It is intended to be mounted immediately over the workplace, and it can be either hung from the ceiling, mounted on the desk or a dividing wall, or it can be a free-standing floor ...
Optical wireless communications (OWC) is a form of optical communication in which unguided visible, infrared (IR), or ultraviolet (UV) light is used to carry a signal. It is generally used in short-range communication. OWC systems operating in the visible band (390–750 nm) are commonly referred to as visible light communication (VLC).
Visible light is only a small portion of the electromagnetic spectrum. In telecommunications, visible light communication (VLC) is the use of visible light (light with a frequency of 400–800 THz/wavelength of 780–375 nm) as a transmission medium. VLC is a subset of optical wireless communications technologies.
Li-Fi (also written as LiFi) is a wireless communication technology which utilizes light to transmit data and position between devices. The term was first introduced by Harald Haas during a 2011 TEDGlobal talk in Edinburgh.
I.e., a (non-zero) control byte x denotes a power level of 10 3(x−254)/253. (A value of 255 is reserved for freezing the current lighting level without changing it.) This is designed to match human eye sensitivity so that perceived brightness steps are uniform, and to ensure corresponding brightness levels in units from different manufacturers.
Temporal light artefacts (TLAs) are undesired effects in the visual perception of a human observer induced by temporal light modulations. Two well-known examples of such unwanted effects are flicker and stroboscopic effect. Flicker is a directly visible light modulation at relatively low frequencies (< 80 Hz) and small intensity modulation levels.
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