Back to results
US 4,147,960 AGranted
Plasma display panel including shift channels and method of operating same
AssigneeFujitsu Limited
InventorsShizuo Andoh, Kazuo Yoshikawa
Life of this patent
Estimating the term…
Abstract
A gas discharge panel in which a pair of substrates each has provided thereon a plurality of buses and a plurality of electrodes regularly connected to the buses, and in which the substrates are disposed opposite to each other with a discharge gas sealing space defined therebetween. By applying switching voltages to the buses, discharge spots between pair of opposed electrodes are sequentially shifted. No cross-over parts for electrode connections are present on the substrates.
Claims31
A plasma display panel comprising:
- a plurality of parallel shift channels, each said shift channel comprising a series of shift discharge cells, each said shift cell being defined between opposing portions of a pair of electrodes respectively disposed on a pair of substrates and separated by a gas discharge space,
- a plurality of display discharge cells located in close association with respective ones of said shift cells, said close association allowing for the fire priming effect of said display cells from discharging ones of said respective shift cells to decrease the firing voltage in said associated display cells, said display cells being similarly defined between opposing portions of display electrodes on said substrates,
- means for electrically connecting said electrodes of said shift and display cells to respective buses without cross-over for supplying panel operating voltage pulses to shift information in the form of discharge spots selectively along said shift channels and to selectively discharge said display cells by means of said fire priming effect to display said information being shifted.
A plasma display panel for shifting information in the form of discharge spots along a plurality of shift channels and for selectively displaying said shifting information in the form of discharge spots in display cells, said panel comprising
- respective X and Y substrates separated by a gas discharge space,
- a pair of X buses and a pair of Y buses respectively on said X and Y substrates,
- Y shift electrodes and Y shift electrode connectors located on said Y substrate, each said shift channel comprising a colinear arrangement of said Y shift electrodes, said Y shift electrodes of each said shift channels being alternately connected by said Y shift electrode connectors to respective ones of said pair of Y buses, said pair of Y buses being separated by said Y shift electrodes,
- Y linear display electrodes located on said Y substrate, each said Y linear display electrode oriented parallel to and in close proximity to one of said colinear arrangements of said Y shift electrodes,
- a plurality of X meander electrodes located on said X substrate, each said X meander electrodes having a periodic rectangular configuration oriented transversely to said colinear arrangements of said Y shift electrodes, each said X meander electrodes crossing over all of said transverse colinear arrangements of said Y shift electrodes, alternative ones of said X meander electrodes being connected in common to a respective one of said X buses, said pair of X buses being separated by said meander electrodes,
- X shift electrodes periodically projecting from said X meander electrodes, each said X shift electrode having respective portions opposing respective portions of two adjacent ones of said Y shift electrodes across said discharge space, to define a shift cell between said opposing portions, the plurality of said shift cells corresponding to each said colinear arrangement of said shift cells comprising one of said shift channels,
- X display electrodes periodically projecting from said X meander electrodes at locations of said X meander electrodes opposite to a respective portion of said Y linear display electrodes to define display cells between said respective opposing portions of said display electrodes,
- said alternate connection of said Y shift electrodes connectors and said X meander electrodes to said respective X and Y buses comprising connections without cross over of said Y shift electrodes and said X meander electrodes,
- said close proximity of said Y linear display electrodes to respective ones of said colinear arrangements allowing for the priming fire effect between each said shift cell and the respective one of said display cells having the same X meander electrode in common.
6 more elements
The panel of cliam 22, said insulating layer comprising a thin layer with thickness of the order of several microns.
A method for transferring information in the form of a discharge spot in a shift cell of a gas discharge panel into an adjacent display cell with the aid of the fire priming effect, said method comprising:
- applying a display sustain pulse across said display cell a sustain said display cell in whatever initial state of discharge prevails in said display cell, said display sustain pulse comprising a sharply rising leading edge and a peak portion followed by a falling edge;
- applying a shift cell pulse across siad shift cell to cause said shift cell to discharge within a discharge delay time after the application of said shift cell pulse, said shift cell pulse having a leading edge during said peak portion of said display sustain voltage;
- and
- applying a display write pulse across said display cell during said peak portion of said display sustain pulse to cause a discharge in said display cell as a result of said fire priming effect from said discharge in said adjacent shift cell resulting from said shift cell pulse, said display write pulse causing said discharge in said display cell only when said initial discharge state of said display cell is not in the discharge condition, said display write pulse having a relatively narror width compared to said display sustain pulse,
- whereby said information in the form of said discharge spot in said shift cell is reflected in the final discharge state of said display cell.
2 more elements
Dependencies are inferred from the claim text.