P-55: Tiny Codec for Decreasing Frame Memories in Display Driver ICs — Smart Pixel-Data Codec (SPC)

Abstract

We propose a tiny compression and decompression codec, Smart Pixel‐data Codec (SPC), for display pixel data. This codec can greatly reduce frame memories with a constant data compression rate and, therefore can reduce chip area of display driver ICs. Since random accessibility to the frame memory is kept for the SPC circuit, it is very suitable for the circuit implementation on display driver ICs. Comparable image quality with original images has practically been achieved even for the compression rate of 72%.

64.2: Invited Paper: Advanced LCD Driver Technologies

“…We have proposed a novel codec, Smart Pixel-data Codec (SPC) [5]. SPC is a very tiny, but lossy dither based codec, and consists of a compression circuit and a decompression circuit.…”

46.3: DRAM‐Frame‐Memory Embedded SOG‐LCD

“…For the solution, SOG-DRAM technology was developed, where 1-TFT 1-capacitor (1T-1C) DRAM and CODEC were created with poly-Si TFTs on a glass substrate [4,5] .…”