Level Shift And Clamp Circuit For Vertical Logic Control Signals - Epson S1D13706 Technical Manual

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Epson Research and Development

Vancouver Design Center

2.5 Level Shift and Clamp Circuit for Vertical Logic Control Signals

Connecting to the Epson D-TFD Panels

Issue Date: 01/02/23

The vertical system power supplies are swung between positive and negative values.

However, the vertical control signals from the S1D13706 are between GND and VCC.

Signals going to the panel must be level shifted to the swinging power supply levels. The

transition from high to low, and low to high for these control signals must take place at the

same time that the swing power supply switches states. Figure 2-6: "Logic for Vertical

Control Signals" shows the circuitry required for the vertical control signals. The control

signals on the left are outputs from the S1D13706 and the derived control signals on the

right are connected to the LCD panel.

Figure 2-6: Logic for Vertical Control Signals

X31B-G-012-03

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