What is an LED driver?
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Regardless of type, size, or power, all LEDs work best when driven with a constant current source since LED colour changes with small variations in driving current. LEDs often support varying system voltages and forward voltages, which can cause variations in LED brightness and colour. An LED driver is a self-contained power supply that has outputs matched to the electrical characteristics of your LED or array of LEDs. There are currently no industry standards (as of 2009), so understanding the electrical characteristics of your LED or array is critical in selecting or designing a driver circuit. Drivers should be current-regulated (deliver a consistent current over a range of load voltages). Drivers may also offer dimming by means of pulse width modulation (PWM) circuits. Drivers may have more than one channel for separate control of different LEDs or arrays. |
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| 2012-02-13 | LCD monitors face feeble market, inventory jitters WitsView predicted that shipments of LCD monitors will fall by 3-5 percent QoQ and three percent YoY in 1Q12 due to the Economic debt crisis and weak economy, among others. |
| 2012-02-10 | GaN-on-Si tech cuts HB-LED cost by 80 GaN-on-Si tech cuts HB-LED cost by 80 |
| 2012-02-10 | White LEDs offer up to 148lm/W at 85°C Cree's XLamp XT-E white LED comes in a 3.45 x 3.45mm footprint and claims push LED adoption and lower cost. |
| 2012-02-10 | LED driver reference design touts 90% efficiency LED driver reference design touts 90% efficiency |
| 2012-02-09 | Mask alignment system boasts throughput up to 220 wafers/h The EVG620HBL claims to deliver high yield that optimizes the manufacture of high-brightness LEDs. |
| 2012-02-09 | LED drivers with PWM dimming for LCD backlight LED drivers with PWM dimming for LCD backlight |
| 2012-02-06 | LEDs feature up to 450mcd luminous intensity The VLMx1300 series from Vishay touts 130° viewing angle and a maximum forward voltage of 3.8V. |
| 2012-02-02 | Shunt protectors tout up to 18V off-state voltage The Model LSPxxxxAJR Series is engineered for lighting applications such as LED streetlights, LCD backlighting and display lighting. |
| 2012-01-27 | LEDs target camera auxiliary flash The ASMT-Fx70 LEDs provide a 14 degree viewing angle and are available in small 3.6 x 3.2 x 3.4mm surface-mount package. |
| 2012-01-27 | LED bulb prices continue to slide LED bulb prices continue to slide |
| 2012-01-27 | Qualcomm mum on Pixtronix acquisition cost The telecoms company has bought a fabless startup that produces a display based on a MEMS-based digital micro shutter that modulates light from an RGB LED backlight. |
| 2012-01-26 | Soitec, Sumitomo demo 'smart-cut' GaN wafers The substrates are produced by transferring ultra-thin high quality GaN layers from a single GaN wafer to produce multiple engineered GaN substrates. |
| 2012-01-24 | Low backlight demand pulls GaN LED market Low backlight demand pulls GaN LED market |
| 2012-01-19 | CSA opens HK testing, certification lab The facility is equipped with advanced technology and will provide significant localised testing capabilities for manufacturing clients. |
| 2012-01-17 | LED end market to grow despite oversupply burden LED end market to grow despite oversupply burden |
| 2012-01-20 | Demo board for LM3448 based flyback LED driver Demo board for LM3448 based flyback LED driver |
| 2012-01-18 | Demo board for LM3410X LED driver switching converter Demo board for LM3410X LED driver switching converter |
| 2012-01-13 | Board mounted LED drivers feature 5, 7, 14, 20W Board mounted LED drivers feature 5, 7, 14, 20W |
| 2012-01-12 | Self-emitting display geared for large screens Sony has developed a 55in Full HD self-emitting display using LEDs as the light source that touts higher contrast ratio and wider color gamut. |
| 2012-01-11 | LED chipsets yield 100, 120 and 150lm/W LED chipsets yield 100, 120 and 150lm/W |
| 2012-01-09 | Drop in MOCVD spending drags LED equipment buy Drop in MOCVD spending drags LED equipment buy |
| 2012-01-09 | LED tower light operates from 12-30VDC LED tower light operates from 12-30VDC |
| 2012-01-06 | High-brightness LEDs for outdoor videos The C4SMD offers the brightest performance at zero degree intensity and the C4SMT offers the brightest peak intensity performance at a -20 degree angle. |
| 2012-01-06 | Power supply geared for LED moving signs Power supply geared for LED moving signs |
| 2011-12-28 | TFT-LCD market awaits fate in 1Q12 The sluggish market demand and downstream clients' conservative inventory stock-up resulted in the panel industry to suffer in 2H11. |
| 2011-12-26 | Boost converters tout 1MHz switching frequency The ZLED7015 can drive devices that require a constant voltage and the wide input voltage range of 6-30V supports applications. |
| 2011-12-21 | LED firms inch toward lighting market LED firms inch toward lighting market |
| 2011-12-20 | 1.9mm pitch LED display targets indoor apps 1.9mm pitch LED display targets indoor apps |
| 2011-12-15 | Low-cost LED seen to drive market in 2012 Low-cost LED seen to drive market in 2012 |
| 2011-12-14 | Philips push for LED lighting adoption Philips push for LED lighting adoption |
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