先解釋基本原理


CHIP (VGA CHIP) 輸出 TTL ->經 383(或363) 轉 LVDS ->cable ->LCD內部 有384或364轉 TTL 到 LCD controller chip

因為 LVDS只要 4或5對 differential傳輸線又差動低電壓可傳較遠 .....

TTL 要 8bitx3+4 或6bitx3+4 較多線 但較省chip

其實你的問題去www.national.com就可以找到很多答案了~ LVDS是她們推的規格

Low Voltage Differential Signaling (LVDS) is a new technology addressing the needs of today's high performance data transmission applications. It is also designed to meet the needs of future applications since the power supply may be as low as 2V. This technology is based on the ANSI/TIA/EIA-644 LVDS Interface Standard.

LVDS technology features a low voltage differential signal of 330mV (250mV MIN abd 450mV MAX) and fast transition times. This allows the products to address high data rates ranging from 100's Mbps to greater than 1 Gbps. Additionally, the low voltage swing minimizes power dissipation while providing the benefits of differential transmission.

The LVDS technology is used in simple line driver and receiver physical layer devices as well as more complex interface communication chipsets. The Channel Link chipsets multiplex and demultiplex slow TTL signal lines to provide a narrow, high speed, low power LVDS Interface. These chipsets provide dramatic systems savings in cable and connector costs, as well as a reduction in the amount of physical space required for the connector footprint.

LVDS solutions provide designers with a new alternative to solving high speed I/O interface problems. LVDS delivers Megabits @ milliwatts for today's and tomorrow's bandwidth hungry data transmission applications.