| 摘要 |
A processor for a photo sensor signal in a projection display device, comprises a photosensor S1-S8 generating a sensor signal having a current component indicative of projected raster illumination. The sensor signal includes a scan related crosstalk voltage component. A differential amplifier U280 generates an output signal responsive to the sensor signal. The sensor current component is converted to an amplified sensor voltage component and the crosstalk voltage component is differentially amplified. The sensor voltage component has a greater magnitude than the crosstalk voltage component in the output signal.
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