Display Technology I Product News
TI introduces LED drivers for high- performance lighting
Texas Instruments has introduced three new DC/DC LED drivers that will help to simplify white colour tuning for high-colour rendering and ultra-low dimming in professional-grade indoor and outdoor LED lighting applications. The TPS92660 two-string LED driver and TPS92640/1 synchronous buck controllers address the challenges associated with precise colour and brightness control lighting that designers face in creating high quality light engines for commercial area lighting, including architectural and retail displays, as well as LED-based projection systems and automotive running lights.
The TPS92660 is an 80-V input voltage, two- string LED driver consisting of one DC/DC buck regulator and one linear channel for two-colour, typically white plus red, LED mixing. Using the I2C interface and one-time programmable ROM, a lighting manufacturer can precisely tune the white correlated colour temperature (CCT) and brightness of the luminaire during production to deliver the enhanced lumen quality required in area, retail and architectural lighting. This method of colour tuning eliminates the need for expensive binned LEDs, reducing system costs. Analogue or pulse width modulation (PWM) input signals can be used for brightness and colour adjustment after ROM programming. The TPS92640 and TPS92641 are 85-V input
LED Engin launches intelligent CRI 90 white LED
LED Engin has announced the immediate availability of the LuxiTune, an intelligent, compact, single emitter light engine that delivers directional light with halogen-style dimming, hugging the black body curve from 3000K down to1800K. Luminous flux is 1100 lumens, equivalent to a 60W halogen lamp. Luminous efficacy is 63 lumens per Watt hot. At full intensity, the colour rendering index (CRI) is 90 and LuxiTune maintains a CRI average of 85 and R9 red content of 70 as it dims. With a diameter of 50mm, LuxiTune makes it easier to create a compact lighting fixture that works with standard 0-10V dimmers or via a DMX interface. The LuxiTune light engine is comprised of a 12-die, compact single emitter with intelligent control circuit and complementary TIR optic. The die are matched to within 3 MacAdam ellipses (SDCM) and dimming tracks the black body curve to within three SDCM, producing consistent, natural light across the full dimming and CCT range. The multi-layer ceramic substrate minimises the package thermal resistance and provides an almost stress-free environment for the chips providing effective heat dissipation and
voltage, adjustable frequency, synchronous buck DC/DC LED controllers with industry-leading contrast ratios that deliver smooth, deep dimming profiles required in indoor/outdoor area lighting and LED projectors. The controllers accept analogue and PWM inputs resulting in dimming ratios of 500:1 and 2500:1, respectively. Continuous-conduction mode operation preserves dimming linearity, which enables the TPS92640/1 to provide true analogue “dim to zero” capability. The TPS92641 adds one input and one output pin for 20,000:1 ratio parallel shunt FET dimming.
Texas Instruments |
www.ti.com
New LED lighting power and dimming controls from Phihong
Phihong USA has expanded its series of remote access tools for OEM LED lighting applications to include both touch controls and remote controls. The new services enable OEM customers to offer value-added, convenient control options for a broad range of both residential and commercial LED lighting products, which can boost sales by providing an enhanced end-user experience. Commenting Keith Hopwood, vice president of Phihong USA said “These services will help lighting designers avoid potential roadblocks during the development process, such as trouble linking a remote control to an LED driver, and decrease a product’s overall time to market.” Phihong’s LED lighting remote control enables users to switch lights on and off and use dimming features with the simple click of a
button, making them perfect solutions for home or office lighting applications. The slim remote is powered by a 3V button-cell battery and has a range of up to 7 meters (23 feet) when pointed directly at the IR receiver. Phihong also offers wall-mounted touch-key
controls with the same functionality as the remote controls. Touch control pads may be wall-mounted up to 10 meters (33 feet) away from the receiver and are suited for wide range of lighting applications, including medical facilities and clean rooms. The touch and remote lighting controls are a part of Phihong’s custom LED Lighting solutions, which are available only to OEM customers.
Phihong |
www.phihong.com
OMC launches new range of SPECTRALUX LED arrays
OMC has launched its 550 series SPECTRALUX Light Engines targeting applications that require high levels of light output, such as rail signalling, runway lights or architectural spotlighting. SPECTRALUX Light Engines are arrays of highly efficient, tightly-matched LEDs which are the preferred light source in a wide variety of luminaire applications because they enable lighting designers to quickly, reliably and easily take advantage of LED technology. OMC’s 550 series range in light output
from 2205 to 6635 lumens. Luminous efficiency ranges from 85.75 to110.5 lumens/watt. Other SPECTRALUX Light Engines perform up to 130 lumens/watt and higher. In common with all OMC’s light engines, the 550 series products have an extremely long lifetime. They are also very simple to use, requiring only a constant-current supply to drive them. Commenting OMC’s commercial director, William Heath said, “Our light engines are
maximum light emission. These features ensure that colour point stability is maintained throughout the product’s long service life. Optics are available in 24°, 32° and 45° beam angles. The lenses facilitate uniformity over angle, maximise lumens in the beam while minimising glare and produce a gentle roll-off profile at the beam edges. LuxiTune light engines are available for immediate shipment.
LED Engin |
www.ledengin.com
Samsung introduces new, high efficacy chip on board LED packages
Samsung Electronics has introduced a new 129lm/W high efficiency, chip-on-board (COB) family of LED packages, LC013/26/40B, which features a compact light emitting surface (LES), designed for use in high performance indoor and outdoor lighting, and ideally suited for spotlight applications.
'The new 13,26, and 40W, 129 lm/W high performance COB package family is based on our leading class chip and phosphor technology,' said Jaap Schlejen, senior vice president, LEDlighting sales and marketing, Samsung Electronics. 'The new COB family has been designed to meet Zhaga specifications, and has a low thermal resistance and superior heat dissipation for high reliability.'
30 May 2013
The series - LC013/26/40B,features a 129lm/W light efficacy at 80 CRI (Color Rendering Index) and 5000K CCT (Correlated Color Temperature)and is available in 2700K, 3000K and 4000K versions. By adopting chip-on- board technology that uses metal core PCBs, the new COB family is able to offer improved colour uniformity and light quality, while achieving a high luminous flux of up to 6000lm in a single LED package.
The Samsung COB family will be available in May with further additions to Samsung's COB package lineup to be made later this year.
Samsung |
www.samsung.com Components in Electronics
designed to simplify the process of developing effective and efficient LED lighting systems. We have optimised optical efficacy, addressed the thermal issues and performed hundreds of thousands of tests to ensure that we are delivering a high quality and reliable product.”
OMC|
www.omc-uk.com
Molex targets medical, industrial and consumer applications with latest touch screen technology
Molex Incorporated’s Projected Capacitive Touch Screens, which leverage existing Molex capacitive switch technology, have been designed to allow original equipment manufacturers (OEMs) to meet specific customer needs by providing customised embedded software; multiple screen and glass styles; a variety of treatment finishes and various output interface choices. “There is a growing demand for touch
screen technology in mid-to-low volume market applications such as hand-held devices, monitors, displays and other interactive applications, especially in the medical field,” said Jeff Nagy, product manager, Molex. “The Molex Projected Capacitive Touch Screen gives OEMs looking to incorporate touch screen technology into their products a highly customisable, low-cost option that enables them to meet a host of customer requirements.” The Molex Projected Capacitive Touch
Screens feature an etched conductive layer that enables touches to be sensed through the protective layers, providing a long use life of up to 200 million actuations. The 10 point multi- touch capability allows advanced gesturing
functionality such as pan, rotate, expand and flick. The product is also available in a wide array of customisable options to meet many specific design criteria and budgets. The product is intended for a variety of applications including medical IV pumps, defibrillators, glucose meters and pulse oximeters; industrial equipment controls and consumer equipment such as tablets, hand- helds and GPS devices.
Molex Incorporated |
www.molex.com www.cieonline.co.uk
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