A 1.4‐Gbps intra‐panel interface with low‐power and low‐EMI schemes for Tablet PC applications

Abstract

-An intra-panel interface addressing all of the high-speed, low-power, and lowelectromagnetic interference (EMI) requirements for tablet personal computer applications is presented. This work proposes an adaptive clock window scheme to achieve 1.4-Gbps data-rate. For EMI suppression, data scrambling, horizontal blank period pattern scrambling, and novel clock and data recovery circuit are introduced. Lastly, for power-saving, the proposed interface dynamically biases source driver's output buffers and employs early charge sharing by controlling the configuration data. For verification, a WQXGA thin-film transistor liquid crystal display system is implemented with the timing controller and source driver ICs that are fabricated using 65-nm and 180-nm complementary metal-oxide semiconductor (CMOS) processes, respectively. The liquid crystal display system demonstrates maximum operation speed of 1.4 Gbps and suppression of EMI noise in LTE Band-20 and GSM 850 bands. The proposed power-saving schemes achieve 4.3% reduction in total power consumption by source driver IC, which reaches about 85% of power consumption by enhanced reduced-voltage differential signaling interface circuit.

A 13‐bit universal column driver for various displays of OLED and LCD

“…Therefore, the column driver for OLED needs to realize separated DACs to support separate gamma corrections. Moreover, the data protocol between timing controller(TCON) and column drivers is various according to applications . Because of this difference, column drivers have been developed for each application.…”

22.2: WITHDRAWN: 22.3: Invited Paper: Intra‐Panel Interface Technology for High‐Resolution Tablet PC Applications

“…On the other hand, eDP interface is also often adopted due to higher data rate and fewer number of high speed signal lines for a multichip solution of a timing controller and column drivers which offers advantages like large display panel size and narrow bezel width. To distribute image data from the timing controller to column drivers at high data rate, several dedicated intra-panel interfaces for Chip-On-Glass (COG) technology such as Low Current Differential Signaling (LCDS) [1], Reduced Voltage Differential Signaling (RVDS) [2], and enhanced Reduced Voltage Differential Signaling (eRVDS) [3][4][5][6] have been developed. These intra-panel interfaces also require low power and low electromagnetic interference (EMI) or RFI noise radiation performance for long battery lifetime and to guarantee RF connectivity, respectively.…”