A reduced-voltage differential signaling (RVDS) interface for chip-on-glass TFT-LCD applications

Abstract

Reduced-voltage differential signaling (RVDS) is a novel interface for TFT-LCD panels with a chip-on-glass (COG) structure, which has a point-to-point topology and a voltage mode differential signaling scheme. The voltage-driving interface scheme has advantages in high-speed operation owing to its relatively small time constant for the resistive channel condition. And reduced-voltage signaling can reduce the power consumption of a transmitter. The display source driver IC with an RVDS interface, which is fabricated by using a 0.25-mu m CMOS process with a 2.5-V logic supply voltage, offers a high data rate up to 500 Mbps, low-current consumption of 2.2 mA, and good EMI characteristics. Also, an RVDS interface has programmable options that control the bandwidth, system power, and EMI performance. Therefore, the RVDS interface is a competitive solution for low-power, low-cost, and slim notebook applications