IDT Demonstrates World's First Touch-Over-AUX DisplayPort™-Based Touch Screen Technology

Integrated Device Technology, Inc. (IDT®)

, the Analog and Digital Company™ delivering essential mixed-signal semiconductor solutions, today announced it has demonstrated the world's first usage of the DisplayPort auxiliary (AUX) channel to carry touch screen data. The demonstration implements a novel technique for transmitting the touch sensor data over the existing DisplayPort AUX channel to the operating system (OS), simplifying and lowering the cost to integrate touch technology into display devices such as tablets, notebooks, All-in-One (AiO) devices, monitors, kiosks, and point-of-sale (

) terminals. The demonstration took place during the 2011 International Consumer Electronics show in Las Vegas on January 6-9, 2011. The technology demonstration utilizes the IDT VPP1101 DisplayPort receiver connected to a field programmable gate array (FPGA) that is programmed to interface with the touch sensor's SPI output and the IDT VDAP1000, a monolithic timing controller, white LED driver, and power management device. The discrete prototype demonstration functions to transmit the touch sensor data over the DisplayPort AUX channel while driving the digital and analog needs of the LCD panel. This technology will enable notebook system manufacturers to eliminate USB interface communication from host to panel and reduce the number of wires that must pass through the display's hinge, simplifying the design and reducing costs. Likewise, integration of a touch sensor controller alongside a DisplayPort-based LCD timing controller (TCON) will benefit panel manufacturers by reducing IC component count and simplifying the overall system, resulting in lower system cost and smaller physical dimensions. “Most existing touch sensor controllers require extra USB cables, ports and components to integrate touch sensor functionality with the display. IDT's approach eliminates these cost adders by leveraging the benefits of DisplayPort,” said Ji Park, vice president and general manager of the Video and Display Operation at IDT. “By using the DisplayPort AUX channel to transmit the touch data back to the host, no new wiring or ports are required. IDT's technology simplifies the hardware requirements and lowers the overall solution cost.” “AMD

understands the growing trend of touch enabled devices and foresees the need to enable more efficient designs,” said David Cummings, director, Technology Management, AMD. “To achieve this, AMD provided tools to IDT to enable the tunneling of touch data over the GPU's embedded DisplayPort AUX channel. This implementation can reduce overall system cost, spacing requirements and potentially save power.” This latest technology migration extends the previous mixed signal innovations that IDT has pioneered through integration of power management and LED backlight technology into its timing controllers. The touch-over-AUX demonstration offers the possibility of further integration to solve system level problems with mixed-signal technology. IDT's analog and digital expertise coupled with a total-system-solution approach will continue to lead the technology in this market. To learn more about IDT's video and display solutions, visit www.idt.com/go/display.