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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.
Ilọsíwájú
5 hours
Ìlànà
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 ẹyọ
Neon Indicator Lamp1 ẹyọ
Power Resistor Kit - 10W (25 pack)1 ohun èlòTools needed:
Digital Multimeter (Lab Grade)
Lab Safety Goggles (Chemical Splash)Àwọn ohun-èlò
3- Placeholder
- 1 ẹyọPlaceholder
- 1 ohun èlò$6.00
Àwọn irinṣẹ́ tó nílò
4- Placeholder
- Placeholder
- Placeholder
- Placeholder
Estimated Total
$6.00Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.