Method and apparatus for transmitting images to a viewing screen
Power efficient sustain drivers and address drivers for plasma panel
Display unit by cathodoluminescence excited by field emission
Matrix-addressed flat panel display
Matrix addressing arrangement for a flat panel display with field emission cathodes
Field emission cathode array coated with electron work function reducing material, and method
Brightness control for flat panel display
Luminance control for cathode-ray tube having field emission cathode Patent #: 5103145
ApplicationNo. 864702 filed on 04/07/1992
US Classes:315/349, Discharge control discharge device load315/169.1, Diverse-type energizing or bias supplies to different electrodes315/169.3, Electroluminescent device315/169.4Gas display panel device
ExaminersPrimary: LaRoche, Eugene R.
Assistant: Dinh, Son T.
Attorney, Agent or Firm
International ClassG09G 003/10
AbstractA flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage. Although the invention was created with field-emission displays in mind, the technique may be used in any matrix-addressable display (e.g. vacuum fluorescent, electro-luminescent, or plasma-type displays) where high pixel activation voltages must be switched. In a preferred embodiment field emission display, emitter-to-grid voltage differential is maintained near zero during non-emission periods, and is raised to a level sufficient to cause emission by grounding pixel emitters at each row and column intersection through a pair of series-connected field-effect transistors (FETs). The emitter base electrode of each emitter node is coupled to the grid via a current-limiting transistor. Display brightness control is accomplished by varying the gate voltages of either FET, such that emission current can be adjusted. In addition, a fusible link is placed in series with the grounding path through the series-connected FETs. Gray scale shading is accompanied by varying the duty cycle of pixel actuation time as a percentage of frame time.
Field of SearchDischarge control discharge device load
Diverse-type energizing or bias supplies to different electrodes
Gas display panel device
DISCHARGE DEVICES HAVING A MULTIPOINTED OR SERRATED EDGE ELECTRODE
Point source cathodes
Multipointed or serrated edge electrode