A 20-in. diagonal color gas-discharge panel with 640*448 cells and an average cell pitch of 0.65 mm has been experimentally developed using thick-film printing and photolithographic phosphor deposition techniques. Improvements in both the cell structure and fabrication technique have produced wide memory margins for the pulse memory operation. Full-size NTSC color TV pictures with excellent uniformity have been displayed with an area luminance of 17 fL and a luminous efficacy of 0.13 lm/W.
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