| 摘要 |
PROBLEM TO BE SOLVED: To input an image signal from a personal computer to a liquid crystal projector without connecting the personal computer and the liquid crystal projector with a cable. SOLUTION: Image data sent by an infrared ray are fed to an interface circuit 6 via an infrared ray receiving section 5. The interface circuit 6 converts an infrared ray pulse into a digital signal and the converted digital signal is expanded into an image by a digital processing section 7 and a dual port memory 3 and the result is fed to a D/A converter 4. The D/A converter 4 converts the digital image signal into an analog image signal and the analog image signal is fed to a liquid crystal drive circuit 1. The liquid crystal drive circuit 1 conducts polarity inversion or the like and the polarity-inverted signal is displayed on the liquid crystal display panel 2. |
