A new primary side regulation constant voltage (PSR-CV) two-stage solution is proposed in this paper to avoid low frequency current ripple and to maintain high power factor, low cost compared with currently single stage and conventional three-stage solution in analog LED dimming or non-dimming application. PSR-CV is employed in primary side to achieve high power factor, simple circuit combined ...

A bilevel driving approach was proposed in the literature for mitigating the energy wastage associated with driving LEDs at high peak current. The main idea is to introduce two drive parameters, i.e., high/low PWM current levels and duty cycles, that give rise to a 2-D luminosity control capability. The same idea was later generalized to an n-level driving approach for maximizing the electrical...

In Real time development 32-bit CPU’s which are widely used satisfies high speed processing, but they need a platform which makes it to run systems steadily and speedily. Stability and security plays an important role in embedded field. Based on the price, architecture and security Linux is one platform which plays an important role in embedded applications .The new version kernel has more bene...

Description: The goal is to increase the efficiency and reduce the cost of solar power through the integration of PV, Li-battery, and LED lighting technologies. Since all components are in the form of thin films, the PV/battery/LED system can be integrated as a single module. Since half of the materials cost of each device is the substrate, integrated module will also reduce materials costs and...

SUMMARY This paper presents a design of the software and hardware modules of an embedded board with both a sensor and an interface circuit which not only control home light-emitting diode (LED) lighting appliances but also reduce their differences in brightness caused by luminous decay. This design consists of four parts: an automatically adjusted LED driver, environment illumination detection,...

LED lighting has the potential to offer many benefits to the user and to society as a whole. Very high efficiency together with extremely long life expectancy of the LEDs reduces the energy consumption and the use of resources, and can offer low lifecycle cost. In order to become widely accepted, LED lighting must provide dimming capability at least equivalent to that offered by traditional inc...

The rise of peer-to-peer marketplaces has led to many previously unrated commercial transactions being rated. Of course, online rating systems can lead, on occasion, to reviews that are unfair or unrepresentative of the true quality provided. On the one hand, receiving an unfairly low rating once, might induce participants to exert more effort and receive a better rating the next time. On the o...

The increasing technological inventions like cellular phones and GPS devices, we observe increasing number of distractions to divert the driver’s attention. This distraction has led to increasing number of accidents on road, which brings a need of a Drowsiness Detection System that calculates various eye parameters to help the driver stay alert. This type of system brings about alertness and ac...

UNLABELLED Motivation models in driving behaviour postulate that driver motives and emotional states dictate risk tolerance under various traffic conditions. The present study used time and driver performance-based payment systems to manipulate motivation and risk-taking behaviour. Ten participants drove to a predefined location in a simulated driving environment. Traffic patterns (density and ...

Driver fatigue in endurance motor racing, has been problematic for driver safety and optimal performance. Historically in this sport focus has been primary on improving mechanical performance; making the racecar light, faster and improving grip (aerodynamics and suspension geometry). Driver safety has come secondary. A series of fatal accidents that were attributed to fatigue have led to rule c...