LCD displays work by twisting liquid crystal molecules with electric fields; without power, some LCDs appear white while others appear black.
Notes on verification
Standard LCD physics documented in display technology textbooks and engineering references [2026-08-28 re-verified orphan: promoted with 7 independent source(s)] [2026-08-29 audit re-verified: 6 independent source(s)]
Sources
- https://arxiv.org/pdf/1801.09812 (reverify-primary)
- https://www.sciencedirect.com/topics/engineering/liquid-crystal-display (corroboration)
- https://orientdisplay.com/knowledge-base/lcd-basics/how-liquid-crystal-displays-work/ (corroboration)
- https://hardforum.com/threads/normally-white-and-normally-black-lcd-panels.1242137/ (corroboration)
- https://focuslcds.com/frequently-asked-questions/ (corroboration)
- https://www.doitvision.com/common-lcd-display-mode/ (corroboration)
- https://www.kimeery.com/normally-white-and-normally-black-tn-lcd-display.html (corroboration)
- https://www.bohrium.com/en/sciencepedia/feynman/keyword/lcd (audit-corroboration)
- https://xdaforums.com/t/lcd-screens-which-colour-uses-most-power.647668/ (audit-corroboration)
- https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5793458 (audit-corroboration)