| 摘要 |
A method and an apparatus for converting a plurality of electrical signals (14(a-c)) into a color visual display on a device (10). The device (10) comprises three CRT's (16(a-c)). Each CRT (16(a-c)) receives an electrical signal (14(a-c)), generates a beam of electrons (24(a-c)), modulates the beam of electrons (26(a-c)) and converts them into a beam of light (18(a-c)). The beams of light (18(a-c)) are focused and are delivered to impinge an optical mask (32) and to pass therethrough to impinge a photocathode screen (40) in an evacuated envelope (30). Within the envelope (30), spaced apart from the photocathode screen (40), is a segmented phosphor screen (42) with the phosphor screen (42) being defined by three different types of phosphor compositions in three different locations. Photoelectrons released from the photocathode (40) are accelerated and directed to impinge the phosphor screen (42). |
