← Back to Patent Explorer
EP0047198A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Display method using a thermo-optical effect with memory in a film of disc-like liquid crystals, and disc-like liquid crystals showing such an effect

Assignee: Thales SA
•
Filing: 1981-08-11
•
Granted: —
•
Expires: 2001-08-11
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from French On a recherché si certains cristaux liquides disquotiques, soumis localement à un échauffement, puis à un refroidissement rapide, de part et d'autre de la température de transition entre deux mésophases, permettent au cristal liquide de devenir diffusant avec un contraste suffisant pour être utilisé en visualisation. We have investigated whether certain disquotic liquid crystals, locally subjected to heating and then rapid cooling, on either side of the transition temperature between two mesophases, allow the liquid crystal to become diffusing with sufficient contrast to be used. in visualization. Un effet thermo-optique suffisant, avec mémoire, est constaté avec les dérivés suivants du triphénylène de formules: avec et A sufficient thermo-optical effect, with memory, is observed with the following triphenylene derivatives of formulas: with and Application aux dispositifs de visualisation à cristaux liquides. Application to liquid crystal display devices.

Inventors

  • 👤 Jean Billard
  • 👤 Jean-Claude Dubois
  • 👤 Michel Hareng
  • 👤 Serge Le Berre
  • 👤 Jean-Noel Perbet

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 16:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/132; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C09K2019/328

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag