4.4: Invited Paper: Low Cost Dual-Select-Diode AMLCD Technology

Abstract

An alternative Active Matrix backplane technology for LCDs has been developed with performance comparable to TFT LCDs and compatible with TN, MVA and IPS modes. The Dual Select Diode AMLCD requires two or three active array mask steps, leading to 20 % reduction in panel cost and 60 % reduction in capital investment. 4 inch prototypes with 320×320 pixels are presented.

Amorphous‐Metal Thin Films Enable Ultra‐High‐Definition Display Backplanes

“…20 However, the dualselect backplane prototypes produced using SiN x -based MIM-TFDs were leaky in the off-state and only demonstrated 6-bit color resolution. 14 We believe that the availability of an AMNR is a game-changer for dual-select TFD backplane technology. Table 1 highlights how AMNR technology differs from that of previous technology based on a MIM TFD, as well as oxide-TFT backplane technology (using an etch-stop TFT architecture).…”

“…The uniformity issues can be solved by moving to a dual‐select drive circuit 20 . However, the dual‐select backplane prototypes produced using SiN x ‐based MIM‐TFDs were leaky in the off‐state and only demonstrated 6‐bit color resolution 14 …”

“…6 From the early 1990s to the mid-2000s, metal-insulatormetal thin-film-diode (MIM-TFD) and dualselect-diode (DSD) backplane technologies were developed as low-cost alternatives to TFT backplanes. [7][8][9][10][11][12][13][14] The Case for Amorphous Metals Our team at Amorphyx is developing a new generation of dual-select (DS) backplanes using amorphous-metal thin films. The device enabling these backplanes is the Amorphous-Metal Thin Films Enable Ultra-High-Definition Display Backplanes Amorphous-metal thin films can enable a new generation of TFT-free display backplanes for ultra-high-definition (UHD) LCD TVs.…”

“…The question as to whether there are alternatives to using TFTs in backplane technology has been asked for some time 6 . From the early 1990s to the mid‐2000s, metal‐insulator‐metal thin‐film‐diode (MIM‐TFD) and dual‐select‐diode (DSD) backplane technologies were developed as low‐cost alternatives to TFT backplanes 7–14 …”