Patent ID: 6184850
Filing Date: 2001-02-06
Classification: G02F,G09G,H01J,H04N

Abstract:
An image display apparatus, comprising:a light source including a vacuum container containing (i) a plurality of cold-cathode devices arranged two-dimensionally on a substrate, said cold-cathode devices emitting electron beams, and (ii) a phosphor member within said container, said cold-cathode devices irradiating said phosphor member with the emitted electron beams, and said phosphor member emitting visible light when irradiated by the emitted electron beams;a transmission type optical modulation panel comprising a light valve arranged outside of said container, said light valve being illuminated with and modulating the visible light emitted by said light source; anda plurality of variable voltage sources connected to said plurality of cold cathode devices, whereinsaid light source comprises red, green and blue phosphor members for color display and further comprising electric feeding means for operating said cold-cathode devices for irradiating said red, green and blue phosphor members with electron beams, and whereinsaid cold-cathode devices for irradiating said red phosphor members with electron beams, said cold-cathode devices for irradiating said green phosphor members with electron beams and said cold-cathode devices for irradiating said blue phosphor members with electron beams are connected to said respective variable voltage sources capable of changing the amplitude of the applying voltage and/or the time period of the applying voltage.