Low-power FPD-Link serializer offers industry’s highest resolution for tablets

May 16, 2012 // By Paul Buckley
Texas Instruments Incorporated has introduced a low-power, FPD-Link serializer that delivers the industry's highest screen resolution while extending battery life in tablet computers, ebooks, laptops and portable display monitors.

With the industry’s highest pixel clock rate of 185-MHz, the dual LVDS DS90C187 supports WQXGA LCD panels at 30 Hz and QXGA panels at 60 Hz. The nearest competitor only reaches 174 MHz for WUXGA screen resolution. The DS90C187 also extends battery life by consuming a mere 90-mW when supporting the 1080p WUXGA screen resolution.

FPD-Link is the original LVDS interface for LCD panels and is interoperable with TI’s FlatLink products. It uses three or more differential signals, plus a clock, to transmit video data to the panel. LVDS is the most widely deployed interface for mid-sized display panels and requires no software overhead, enabling faster time-to-market for production ramp. Until recently, display resolutions for tablets could get by with a single-lane LVDS interface. With increasing panel sizes and higher resolution displays, dual LVDS interfaces are proliferating.
The DS90C187 features a single 1.8-V supply rail enables ultra-low 90-mW typical power consumption when operating at WUXGA (1920 x 1200) high-definition resolution with 24-bit RGB color.

 A 185-MHz pixel clock allows support of 24-bit color video resolution up to WQXGA (2560 x 1600) at 30 Hz and QXGA (2048 x 1536) at 60 Hz, enhancing the consumer’s video experience.  A space-saving 7-mm x 7-mm dual row QFN package minimises board area and simplifies layout.

The device’s support for reduced-swing LVDS mitigates electromagnetic interference (EMI) while optional 18-bit color mode, 6 bits per pixel, further reduces power consumption and enables compatibility with lower cost panels.

The DS90C187 joins the DS90C185 single FPD-Link serializer, which consumes 50 mW of power, supports 24-bit LCD screen resolutions up to SXGA+ (1400 x 1050) at 60 Hz, and comes in a 6-mm x 6-mm package. The DS90C187 and DS90C185 provide mobile computing designers the widest array of options to choose from when selecting the graphics processor and display panel. The serializers serve as the bridge between the processor and LCD display, and can be combined with