Atmel Corporation announces the introduction of a new family of high-performance 16-string LED drivers that integrate timing algorithms that improve the quality of LCD TV images by eliminating 3D ghosting and flicker effects. With these capabilities, the Atmel MSL2164 and MSL2166 devices offer an attractive viewing and video gaming experience in new 3D and 2D scrolling backlit TVs.
These LED drivers integrate seamlessly with AVR microcontrollers (MCUs) such as Atmel's tinyAVR, megaAVR and AVR XMEGA. The microcontroller processes the timing and dimming instructions to send data to the MSL2164 and MSL2166 devices. AVR devices and firmware provide a total solution that optimizes the overall backlight design, delivering superior performance over competing solutions.
The MSL2164 and MSL2166 devices offer the most efficient power management, backlight control, and multiple dimming modes for 3D, scanning, and regional dimming side-lit LCD TVs that can drive up to 16 parallel LED strings for a comprehensive system and fault Managed to support high performance backlight designs. With this new family of drivers, high-end TV OEMs can use internal illumination timing algorithms that improve backlight timing accuracy to provide higher resolution than other solutions on the market today to achieve high screen resolution and dramatically improve image quality. At the same time, OEMs can choose MCUs with smaller form factors, such as tinyAVR devices, to reduce system overhead.
In the past, TV OEMs had to calculate the appropriate parameters to effectively illuminate the desired backlight area of ​​the display. The LED driver will generate an algorithm to set the appropriate LED string phase to optimize the synchronization of the backlight with the LCD panel. OEMs must often implement additional algorithms to adjust the LED string phase to ensure that the backlight is fully synchronized during frame refresh. The MSL2164 and MSL2166 feature a variety of pulse width modulation (PWM) modes, including forward, reverse, smear, and center. Due to the integration of timing algorithms in the new device, design complexity is reduced, ensuring that the backlight is stable across all LCD elements. The best moment to illuminate.
Girish Ramesh, Atmel's Smart Power Products Marketing Manager, said: "Next-generation TVs, especially those with 3D screens, require a different local dimming method. Our latest LED drivers, the MSL2164 and MSL2166, have intelligent timing algorithms and Programming the PWM mode provides significant performance, design time and cost advantages for OEMs developing LED side-light TVs."
Minimize power consumption and improve backlight performance
The MSL2164 and MSL2166 devices drive external MOSFETs with high current accuracy and LED string matching. These devices feature the widest dimming resolution in the Atmel LED driver family, which improves contrast and consumes power compared to other solutions. Reduce by at least 20%.
12-bit PWM string dimming, up to 4,096 gray scales for better images.
8-bit global brightness adjustment
12-bit PWM string adjustment (string phrasing)
10-bit digital-to-analog converter (DAC) current control for enhanced dimming control in low light conditions
8-bit adaptive power correction that maximizes the efficiency of up to three LED string power supplies.
On-chip EEPROM allows OEMs to pre-program critical system parameters, allowing multiple sub-frames to be used, reducing overall system complexity and cost. The LED driver features an efficiency optimizer that adaptively controls up to three DC-DC converters that power the LED string, minimizing power consumption while maintaining LED current accuracy.
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