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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‐μm 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.