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The Plasma Display Panel
Bitzer and Slottow, 1964. A quarter-million tiny neon cells behind one glass sheet, each a pixel. The trick is memory: charge stored on an internal dielectric keeps a struck cell lit on a sustain voltage too low to have started it, so the panel holds its image with no refresh. It is the Nixie's glow discharge, engineered into a flat grid.
Hejuru
5 hours
Amabwiriza
1
1
A pixel that is a neon lamp
A pixel that is a neon lamp
A plasma cell is a Nixie shrunk to 0.3 mm: same strike and sustain voltages, same Penning gas. Three changes make it a display: a grid of tiny cells; electrodes hidden behind a dielectric that STORES charge; and UV from the discharge lighting red/green/blue phosphors instead of using the neon light directly. Read the embedded Nixie blueprint for the discharge itself.
Tools needed:
Notebook and Pencil2
2
The memory margin: two voltages, and the gap that stores a bit
The memory margin: two voltages, and the gap that stores a bit
Loading Jupyter Notebook...
Tools needed:
Desktop Computer3
3
Strike one cell on a bench, and find the Paschen minimum
Strike one cell on a bench, and find the Paschen minimum
Build one cell and find the Paschen minimum. Two electrodes a few mm apart in a jar on a vacuum pump; HV supply through a series resistor; meter on the strike voltage. Admit gas slowly and the strike voltage falls, hits a MINIMUM, then rises again — the sweet spot where an electron gains enough energy and still finds atoms to hit. Plasma cells sit there, which is why they strike at ~200 V not thousands.
HV safety: one hand behind your back, bleeder resistor across the rail, eye protection. Evacuated glass can implode.
Materials for this step:
High Voltage Boost Module (170V)1 igice
Neon Indicator Lamp1 igice
Power Resistor Kit - 10W (25 pack)1 ibikoreshoTools needed:
Digital Multimeter (Lab Grade)
Lab Safety Goggles (Chemical Splash)Ibikoresho
3- Umwanya
- 1 igiceUmwanya
- 1 ibikoresho$6.00
Ibikoresho bikenewe
4- Umwanya
- Umwanya
Estimated Total
$6.00Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.