In display unit,devices which produce an electrical signal corresponding to the intensity of incident light.An optical image is focused on a matrix of sensors that are then scanned to produce a display picture signal.; 在顯示設備中,一種能產(chǎn)生和入射光強度相對應的電信號的器件。將一幅光學圖象聚焦 在傳感器的基體上,然后經(jīng)掃描產(chǎn)生出顯示圖象信號。