OLED display driver - Page 10

Leadis Technology today announced sample availability of the LDS519, a mono OLED driver IC with integrated controller supporting 4 gray 96x64 and 48-Icons. Integrating 13K bits of full frame memory, the LDS519 is a highly integrated SoC designed to provide vivid and accurate images for MP3 player and mobile phone sub-display applications.

The device inherits all the features of the LDS511, one of the most successful OLED drivers, but offers low cost to give customers the flexibility to prolong it useful lifetime on a wide variety of mobile applications. The interface of LDS519 supports the 80/68 series and Serial MPU interface. The 48 Icons with internal DC-DC helps low power consumption in waiting mode of mobile phone set. And LDS519 can adjust frame frequency for display quality and reference current for brightness of display. LDS519 has an input data order selection function to enhance the flexibility of the module design.

The achievement of a green PIN PHOLED(TM) phosphorescent OLED device in bottom-emission geometry with a CIE of (0.36, 0.61) of above 200,000 hours were attained by combining Universal Display's high-efficiency phosphorescent OLED materials with low-voltage Novaled PIN-OLED(TM) technology and doped transport materials.

"We expect that very low driving voltages below 2.6 V which we already achieved for Ir(ppy)3 can also be obtained for other phosphorescent green emitters" adds Jan Birnstock, VP Technology Transfer.

ON Semiconductor has introduced the NCP5810 - a 2 watt (W) dual output dc-dc converter that offers both positive and negative output. The device's output voltage accuracy, high switching frequency, and small package size makes it particularly suitable for powering a display driver in Active Matrix Organic Light Emitting Diodes (Active Matrix OLED or AMOLED) panel, an emerging display technology for portable applications.

Featuring high overall efficiency up to 85 percent at 1.75 megahertz (MHz) oscillator frequency, the NCP5810 dual output dc-dc converter delivers best-in-class performance. In order to complement the slim form factor of AMOLED display, the converter switches at the high 1.75 MHz frequency, allowing the use of small inductors and ceramic capacitors. Its ultra-thin package with 0.55 mm thickness allows the NCP5810 to fit into the thinnest portable design form factor. In addition, it preserves battery power in shut-down mode with true cut-off function that limits the leakage display current to typically 1 microamp (uA). Additionally, the NCP5810 features cycle-by-cycle peak current limit and thermal shut down protection.

Available in the ultra-thin 3.0 mm x 3.0 mm x 0.55 mm LLGA-12 package, the NCP5810 is budgetary priced at $1.20 USD per unit in 3,000 unit quantities.

MagnaChip launched a new AMOLED display solution supporting WQVGA, 240x432 resolution and 262K colors, is expected to be ready for mass production this month. This product was designed to meet the specific requirements of display panels for mobile TV phones and multimedia phones. Embedded with EEPROM, it controls RGB gamma, oscillator frequency and internal power. The MDDI interface of Qualcomm allows for high speed data transmission.

This solution also offers longer battery life time, due to a special feature that adjusts screen brightness automatically. Further, the solution offers an RGB-separated gamma adjustment, which provides superior, stable color display, and as a result, more natural still images and video images.

Intersil Corporation today announces the release of the ISL97701. By combining high current output, an integrated Schottky diode and fault protection, Intersil provides the industry's most complete boost regulation solution for passive matrix OLEDs. With efficiency up to 87%, the ISL97701 can deliver 50mA of output current at 18V. It can provide up to 28V output, enabling power efficient operations in MP3, portable media players, automotive clustering, and low-end cell phones PMOLED displays. ISL97701 is also suitable for standard boost regulation applications such as WiMax card and LCD bias generator power applications.

The integration of the Schottky diode reduces the BOM cost and saves board space, while an integrated input disconnect switch protects the device against overcurrent, overvoltage and over temperature. The ISL97701 is highly versatile with a variable output that can be set by external resistors to match the needs of the application. At just 3mm x 3mm x 0.9mm, its 10-lead DFN (Pb free) package is a very compact power management IC for portable applications.

Sipex Corporation today announced the latest addition to its family of white LED drivers for the portable market, the SP6415. The device features an inductive boost converter powering two independent drivers for driving the white LED main panel backlighting and powering the OLED sub-display or additional white LEDs. The device is offered in a space saving DFN-10 package.

Ideally suited for dual display architectures such as clamshell phones, the SP6415 can easily be configured to automatically turn off the sub-display when the phone is open. Each driver output current is programmed by a single external resistor. PWM dimming is possible via the enable pin which also is used to put the device into a 1uA showdown which greatly extends battery life.

With an output voltage up to 20V, as many as 5 LEDs in series can be powered at over 80% efficiency when the SP6415 is powered from a single cell lithium Li-Ion battery or internal 3.3V or 5V rails found in most hand-held equipment. When switching from powering the main display to the sub-display, voltage is adjusted to maximize efficiency and minimize power loss. Additionally, the device offers a full protection scheme against fault conditions such as: over voltage, over current, over temperature, and under voltage lock up.

The SP6415 is offered in a small lead-free DFN-10 RoHS compliant package meeting the extended temperature range: -40*deg*C to +85*deg*C. The device is priced at $1.40 each in quantities of a 1,000 units.

Solomon Systech unveiled the SSD1355 color OLED display driver with integrated controller. This device supports up to QQVGA resolution and 262k true color and has intelligent display features for applications such as mobile phones, MP3 players, portable multimedia players and digital cameras.

The SSD1355's compact die size and superfine pitch feature allow for the manufacturing of competitive COF packages to fit all popular resolutions in the color OLED market, such as 128RGB x 160, 128RGB x 128, 128RGB x 96, 128RGB x 64 and 96RGB x 96.

CDT has announced that it will acquire Next-Sierra, for 1.6M$ in stock.

Next Sierra is a Mountain View, California-based hardware developer that specializes in designing light-emitting diode display driver chips.

Leadis Technology today announced production volume shipments of the LDS522, a 65K color OLED driver IC with integrated controller supporting 128 (RGB) x 68, 128 (RGB) x 36, and 96 (RGB) x 68 display resolutions. Engineered for mobile phone sub-displays and MP3 players, the device has achieved an initial design-win in the secondary display of a handset for a top-tier supplier.

The LDS522 offers multiple methods for display optimization, including gamma correction, luminance control, temperature variation compensation, and an EEPROM-based adjustment to address panel-to-panel process variation. The product provides a 65K color upgrade to the area-color capable LDS518 and a resolution upgrade to the LDS514 and LDS516, two of Leadis' other 65K color OLED offerings. Integrating 139k bits of full frame memory, an on-chip oscillator, and a DC/DC converter, the LDS522 is a highly-integrated SoC designed to provide vivid and accurate color images across a variety of operating conditions.

In addition, the LDS522 includes programmable display features such as area scrolling, partial display, and color depth selection for enhanced screen performance.

TMA is a technology which potentially can be incorporated into driver chips to bring active matrix capabilities to passive matrix displays. TMA reduces power consumption and enhances panel lifetime for a given pixel count in passive matrix displays. Measurements on small passive matrix displays that incorporated the TMA solution, demonstrated at least a 50% reduction in power consumption or exhibited double the display luminescence at the same power consumption.

he TMA driving system applies both to polymer and small molecule OLED displays. CDT is currently considering how to bring the technology to market in the shortest possible time. A working demonstrator has been created using individual electronic components, that exploit the new driver and image processing technologies. This will be developed further in the coming months. CDT is in discussion with OLED display producers and IC driver companies with a view to commencing design work for commercialising TMA as soon as possible.