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III. Circuit Implementations:
A.) THE MAIN BODY:
A-1.) Interface board block diagram:
(a) Circuit operations:
The scaling IC has OSD and auto detecting input timing functions. OSD offers adjustable functions to the end-
users. Auto detecting timing function can detect change modes. It outputs the digital R-G-B data, pixel clock
and control signal to TCON of the LCD module. A MCU, build in scaling IC (Realtek2545LH), is responsible for
the system processing. There are two external storing units, one is 24C16 to store the OSD function data and
user preset timings.
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