Displays & LED

E-paper display provides information in smart cities

Fri, Aug 14, 2020

Suitable for public information display in connected cities, the EDP-3133 series e-paper display can be used for smart bus stop signs and real-time public transport information systems. When combined with wireless transmission it can be used in offices or venue to replace traditional single-use paper posters and labels.

Manufactured by Avalue Technology in Taiwan, the 31-inch display is available from Display Technology.

It provides 16-level greyscale black and white and a 180 degree viewing angle. The e-paper technology is responsible for the high quality of viewing even under strong light, says Display Technology.  This is also responsible for low power consumption and bistability, retaining a static image even when powered off, says the company.

The EPD-3133 is an open frame embedded design controlled with an Intel Celeron Apollo Lake CPU. This makes it easy to integrate into any public installation, claims the company.

The EPD-3133 is lightweight, slim and easy to install, and there are options to add touchscreen and a front lighting module to assist viewing in low light environments. The display supports LAN, WiFi or LTE allowing the provision for real-time information, delivering warnings, notifications and public announcements remotely.

Avalue provides the link between front end and back end application programming interfaces (APIs) and sample codes. Users may develop programs, organise content and publish processes in accordance with individual needs and makes changes as required.

Users may choose either Windows 10 or Android 8.1.

Established in 1996 as Display Solutions and acquired by Display Technology in September 2018, the UK subsidiary of Fortec Elektronik, delivers the latest technical innovations in displays, touch screens and embedded computing backed by a service ranging from initial consultation through to sample design, volume manufacturing and immediate-response after-sales support.

The company operates within the UK, across all embedded computing market sectors, including industrial instrumentation and control, transportation, retail/point-of-sale, outdoor signage, medical, marine, audio and lighting control and energy management.

http://www.displaytechnology.co.uk

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Efficient NFC programming method for LED drivers

Fri, Oct 04, 2019

For fast implementation of near field communication (NFC) programming for LED drivers, Infineon Technologies has developed the NFC-PWM series NLM0011 and NLM0010.

The devices are NFC wireless-configuration ICs with configurable PWM output, primarily designed for LED applications. They enable NFC programming implementation by using a PWM signal directly to control the analogue driver IC.

Both devices have two operation modes, passive and active. In the passive mode, the LED driver module is not powered, and the PWM-related parameters can be configured wirelessly via the NFC interface. In the active mode, as soon as the V CC voltage supply is powered, a PWM output is generated according to the stored parameters. With an external R/C filter, the PWM signal is converted to the desired DC voltage to control the current output of an LED driver.

An integrated constant lumen output (CLO) function compensates the luminous flux drop (ageing effect) of the LED module by automatically adjusting the LED current to the ageing characteristics of the LEDs. With an integrated operation-time counter and stored LED degradation curve in the CLO table, NLM0011 automatically adjusts the PWM duty cycle to compensate for the LED degradation.

Fitting seamlessly to the mainstream analogue driver ICs, there is no need for firmware development input and, says the company, it   adopted into existing designs to replace the “plug-in resistor” current configuration concept. Non-volatile memory including unique identification data and 20 bytes free memory for user data is also featured in the devices.

The NLM0011 and NLM0010 can be ordered now in a SOT23-5 package.

NFC programming is an emerging technology designed to replace the “plug-in resistor” current setting method via contactless NFC interface. Besides improving the operational efficiency by enabling automatic programming in the manufacturing line, it can create significant flexibility in the value chain. With this it reduces the LED driver variants, simplifies the selection of LED modules, and allows end-of-line configuration.

http://www.infineon.com/nfc-pwm

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Power Integrations introduces GaN to LYTSwitch drivers

Mon, Sep 09, 2019

The latest members of Power Integrations’ LED driver ICs, the LYTSwitch-6 family, use PowiGaN technology to enable designs that deliver up to 110W with 94% conversion efficiency using a simple, flexible flyback topology.

The high efficiency eliminates the need for heatsinks, reducing ballast size, weight and cooling airflow requirements, says Power Integrations. The 750V PowiGaN primary switches provide very low RDS (on) and reduced switching losses, increasing power conversion efficiency by up to three per cent compared to conventional solutions and reducing wasted heat by more than one-third.

LYTSwitch-6 ICs with PowiGaN technology employ lossless current sensing. They retain existing LYTSwitch-6 characteristics, such as fast transient response for cross regulation for parallel LED strings without the need for additional regulator hardware, and flicker-free system operation, says the company. This allows simple implementation of a pulse width modulation (PWM) dimming interface.

The LYTSwitch-6 ICs with PowiGaN technology enable designs up to 110W for smart residential and commercial fixtures and low-profile ceiling troffers. The high power density enables reduced height and weight, which is vital for space-constrained and sealed ballast applications.

The GaN-based LYTSwitch-6 LED-driver ICs are available now. A reference design (DER-801) is also available, describing a 100W three-way dimming LED ballast.

Power Integrations specialises in semiconductor technologies for high-voltage power conversion, with products that are key building blocks in the clean-power ecosystem, enabling the generation of renewable energy as well as the efficient transmission and consumption of power in applications ranging from mW to MWs.

http://www.power.com

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Osram Opto introduces lighting design library

Mon, Jul 15, 2019

Collaborating with SnapEDA, the electronics design library, Osram Opto Semiconductors has released its entire collection of photodiodes, phototransistors, laser diodes and infra red (IR) emitters on SnapEDA’s website to help PCB designers and electronic engineers integrate them into designs.

Rather than spend days creating digital models for each component in their designs, engineers can simply drag-and-drop Osram components into designs, saving time which can be spent on the design build.

The models can be downloaded without charge from SnapEDA’s electronics design library and from the websites of Osram’s franchised distributors which support SnapEDA models.

Highlights of the library selection include the Synios P 2720 series of high-power IR illumination LED technology with compact packaging, the IR Oslon Black family, for high power density with a small package and integrated lens and the IR Topled D5140 portfolio, a traditional DIL large-area Si PIN photodiode in a compact package.

Electronic design formats that are supported include Cadence OrCAD, Allegro, Altium, Eagle, KiCad, PCB123, Proteus, and Mentor Graphics PADS. The PCB footprints have been created based on Osram’s recommended land patterns or IPC-7351B standards when applicable.

Osram components include LEDs, IR LEDs (IREDs), laser diodes, photodiodes and phototransistors, which are used in automotive lighting, industrial electronics and mobile electronics as well as in general lighting.

SnapEDA is believed to be the internet’s first parts library for circuit board design. It provides ready-to-use building blocks for circuit board design via its website and plug-ins for PCB design tools. The accessibility can save days in product development in products ranging from medical devices, to electric airplanes.

http://www.snapeda.com

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