H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 31/06 (2006.01) G09G 3/22 (2006.01) H01J 31/10 (2006.01) H01J 31/12 (2006.01)
Patent
CA 2151551
A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage/current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V1 is applied to the selected row wire, and a voltage V2 (V2 ? V1) is applied to all other row wires, for controlling the leakage current.
Oguchi Takahiro
Sakai Kunihiro
Suzuki Hidetoshi
Suzuki Noritake
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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