According to the TCL Huaxing release, higher resolution and higher refresh rate have become the trend of display development. High-resolution and high-refresh display puts forward higher requirements for data transmission rate, and traditional Mini LVDS transmission technology cannot achieve high-speed data transmission. Therefore, various panel manufacturers are actively deploying P2P transmission technologies that support high-speed transmission.
TCL CSOT has released the high-speed point-to-point transmission technology CSOT Point-to-Point Interface (CSPI). Compared with the traditional P2P transmission technology, it can achieve higher transmission frequency and transmission rate. High-resolution and high-refresh display data transmission provides a better solution.
The CSPI protocol technology is an in-screen high-speed transmission technology independently innovated by TCL CSOT, which provides a solution for high-speed signal transmission from TCON to Source Driver in the in-display driver architecture. Taking 8K products as an example, if the traditional Mini LVDS technology requires 169Pairs of wiring, productization is not feasible, while the number of CSPI wiring can be reduced to 48Pairs, reducing the number of wiring by 70%.
In addition, the traditional P2P transmission technology will have inter-symbol distortion during high-speed transmission. The AEQ adaptive equalizer design independently developed by TCL CSOT can solve this problem and ensure excellent display quality under high-speed transmission.
The CSPI protocol can reduce the number of wires by 70%.
Unlike the traditional Multi-Drop architecture, the traditional P2P transmission technology uses the internal clock recovery circuit to recover the clock signal based on the received differential signal (including clock signal and data signal), and samples the corresponding data signal based on the clock signal, which has the characteristics of fast transmission rate.
TCL Huaxing CSPI technology, compared with traditional P2P transmission technology, adopts 8B / 9B codec and clock embedding technology to further improve transmission frequency and efficiency, in which transmission frequency is 7.5 times higher than traditional Mini LVDS technology and transmission efficiency is 11% higher than traditional P2P transmission technology.
CSPI protocol transmission frequency and efficiency have been improved
TCL Huaxing said that it is the first-panel manufacturer in China to achieve independent development of P2P transmission technology and has shipped more than 500 million SD ICs with CSPI technology by 2022. In terms of patents, TCL Huaxing CSPI technology has independent codec and other related patents and has applied for the national standard for point-to-point signal interface transmission protocol for LCDs, which can be used by domestic manufacturers free of charge.
TCL Huaxing CSPI protocol technology has covered the whole series of TV / MNT / NB products, and TCL Huaxing has achieved mass production by integrating CSPI transmission technology into UD and 8K products, of which 32″ UD 240Hz and 75″ 8K 265Hz have been equipped with CSPI protocol technology to achieve the first product technology launch.
