Results 11 to 20 of about 10,031 (296)
Dimming Cellular Networks [PDF]
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010 We propose a novel technique called dimming to improve the energy efficiency of cellular networks by reducing the capacity, services, and energy consumption of cells without turning off the cells. We define three basic methods to dim the network: coverage, frequency, and service dimming.
David Tipper +3 more
openaire +4 more sources
A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs [PDF]
International Journal of Photoenergy, 2012 Light emitting diodes (LEDs) have many positive features, such as long life, low power consumption, and high luminous efficacy. Consequently, they are very attractive for use in many applications. Also, the use of LEDs ensures energy savings.
İsmail Kıyak
doaj +3 more sources
Impacts of Local Dimming Algorithms on the Halo Effect in LCD With Local Dimming Mini-LED Backlight
IEEE Photonics JournalThe local dimming mini-LED backlight has become one of the most important technologies for liquid crystal display (LCD), facilitating the improvement on high dynamic range (HDR) and power saving.
Shuai-Shuai Zhou +6 more
doaj +2 more sources
iDim : practical implementation of index modulation for LiFi dimming [PDF]
, 2021 This paper introduces a novel dimming method for Light Fidelity (LiFi) based on a time-domain sample index modulation (TIM), called indexed dimming (iDim). The aim is to provide a wide brightness range, while maintaining a high signal-to-noise ratio (SNR)
Islim, Mohamed Sufyan +3 more
core +3 more sources
A novel index modulation for dimming in LiFi systems [PDF]
, 2020 This paper introduces a novel dimming method for Light Fidelity (LiFi) based on index modulation (IM). A time-domain sample-index modulation (TIM) is proposed for indexed dimming (iDim). The aim is to maintain a high communication performance measured in
Islim, Mohamed Sufyan +2 more
core +3 more sources
PWM-based PPM format for dimming control in visible light communication system [PDF]
, 2012 We report simulation results of pulse width modulation (PWM)-based pulse position modulation (PPM) signal format for visible light communication systems. For simultaneous operation of data transmission and dimming control, PPM data format is added to PWM
Jang, Hyung-Joon +7 more
core +1 more source
Multifunctional Liquid Crystal Smart Glass with Light Field Shaping, Dimming, and Scattering Control
Advanced Photonics Research, 2022 Glass with multiple light control functions has received considerable attention in recent years. This study demonstrates a multifunctional smart glass composed of hybrid‐aligned ion‐doped nematic liquid crystals (LCs).
Li-Min Chang +7 more
doaj +1 more source
How dim is dim? Precision of the celestial compass in moonlight and sunlight [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2011 Prominent in the sky, but not visible to humans, is a pattern of polarized skylight formed around both the Sun and the Moon. Dung beetles are, at present, the only animal group known to use the much dimmer polarization pattern formed around the Moon as a compass cue for maintaining travel direction. However, the Moon is not visible
M, Dacke +4 more
openaire +2 more sources
A Novel Hybrid Dimming Control Scheme for Visible Light Communications
IEEE Photonics Journal, 2017 A dimming control scheme that combines analog dimming and spatial dimming is proposed. The basic idea of the combined scheme is that both the direct current bias level of each individual light-emitting diode (LED) and the number of glared LEDs are ...
Yang Yang +3 more
doaj +1 more source
Quaestiones Geographicae, 2023 The current study was based on sunshine duration data from 13 European stations during 1901–2018. It was found that the variability in the annual total sunshine duration (SD) over Europe is related to the variability in the component of the surface ...
Marsz Andrzej A. +2 more
doaj +1 more source