Leadis Technology Samples LDS291 Si-TFT LCD Driver IC for Virtual VGA

Leadis Technology, Inc. (Nasdaq: LDIS), a provider of best-in-class semiconductor solutions for display, power management, touch and audio applications, announced sample availability of the LDS291 supporting VP Dynamics’ advanced VPW[tm] RGBW display technology. This breakthrough is significant as the patented VPW[tm] RGBW pixel structure provides: 1) significant advantages in backlight power saving, 2) higher brightness for improved outdoor readability, and 3) superior image quality compared to conventional RGB pixel structures. The innovative RGBW architecture allows the LDS291 to provide two modes of operation – a physical QVGA resolution mode and a virtual VGA resolution mode using a pixel density equivalent to conventional QVGA resolution. This unique combination overcomes limitations associated with other RGBW pixel schemes, allowing for excellent Asian character text rendering and enhanced image/video resolution.

The LDS291 delivers backlight power savings of over 40% in physical mode and 70% in virtual mode. It also offers Super Power Saving (SPS) mode and Dynamic Backlight Control (DBC) mode to further maximize savings in power consumption. The SPS mode and DBC functions each provide an additional 10~20% reduction in backlight power consumption.

The 262K color LDS291 is targeted at small to mid-sized TFT displays supporting QVGA to virtual VGA applications. The state-of-the-art features of the LDS291 make it an ideal solution for devices requiring vivid color display with very low power consumption, such as mobile phone, portable navigation device, personal media player, electronic dictionary and other handheld applications. In order to broaden its appeal, the device is compliant with MPU, RGB, and MIPI DSI interfaces.

“With the LDS291 RGBW LCD driver we are demonstrating a leadership position in extending the performance of TFT LCD displays for portable electronics products,” said Keeho Kim, General Manager of the Display Driver Business Unit at Leadis. “While we are currently working with two major display module manufacturers on small screen applications, our intent is to extend the RGBW technology demonstrated by the LDS291 to larger screen sizes.”

About VP Dynamics’ VPW[tm] RGBW Technology
Compared to other RGBW technologies in the market, the patented sub-pixel structure of VP Dynamics’ RGBW offers superior power savings and better image quality with minimal added cost. Its QVGA/VGA dual resolution screen requires only 33% more sub-pixels than a regular QVGA RGB screen, while a conventional VGA RGB screen needs 300% more sub-pixel count than a QVGA RGB screen. Also, its square 2×2 sub-pixel structure allows the display driver to have only 8% higher number of outputs to drive the portrait RGBW screen. VP Dynamics’ color mapping algorithm preserves well the original colors with reduced backlight power.

About Leadis Technology, Inc.
Leadis Technology, Inc., headquartered in Sunnyvale, California, designs, develops and markets analog and mixed-signal semiconductors that enable and enhance the features and capabilities of portable and consumer electronics devices. Leadis’ product offerings include color display drivers, which are critical components of displays used in mobile consumer electronic devices; LED drivers, which provide controlled levels of current required to drive light emitting diodes in diverse applications including mobile backlight units; power management ICs including LDOs, LDO controllers, shunt references, thermal switches, current regulators, and battery charger controllers; audio CODEC and FM transmitter ICs, which are integral components in portable media players and their associated aftermarket accessories; and touch controller ICs, which enable highly reliable touch-based input controls and attractive industrial design options for both mobile and non-mobile applications.

About VP Dynamics
VP Dynamics, based in Hong Kong, is a leading R&D house in Disruptive Technologies and New Business Models around Visual Perception[tm] Technology, enabling displays with lower power, higher resolution, excellent brightness and better contrast. Based upon the human visual perception process, the VPW[tm] display, driven by the proprietary VPW[tm] engine, creates four times higher perceived Virtual Resolution[tm] with Virtual Pixels[tm] without adding more physical pixels in a high-density-pixels packed mobile display.