EPSON announced the S1D15G22 , the latest addition to its line-up of color STN LCD driver ICs for mobile phones. The new driver supports sub-displays with 104 x RGB x 104 dots and 65,536 colors.
When the handset is in standby mode, the driver draws a level of power nearly as low as that of a monochrome driver. With folding phones now the mainstream design, the mobile phone market is seeking backside sub-displays that provide higher functionality and performance in a more compact size.
For example, sub-displays need to offer high color when used as a camera viewfinder. At the same time, however, their power requirements must be modest when displaying a clock, antenna or other icons when the handset is in standby mode. The S1D15G22 was developed to answer these demands.
The driver enables a 65,536-color simultaneous display. In standby mode it consumes just 100µA (typical, partial display and 8-color mode), a current draw nearly as low as that of a monochrome driver. Moreover, the length of the chip has been scaled down to less than 17 mm, thus enabling further sub-display panel downsizing. Using the new driver for sub-display panels on mobile phones also saves power and helps extend the time between handset battery recharges.
Epson Europe GmbH , 80992 Munich, Germany.