Bistable paper white direct view display

G - Physics – 02 – B

Patent

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Details

G02B 26/00 (2006.01) G02B 26/02 (2006.01) G02B 26/08 (2006.01) G09F 9/37 (2006.01) G09G 3/34 (2006.01)

Patent

CA 2347127

A thin, lowpower, paperwhite, direct-view display includes an array of bistable micromirrors (12) that are deflected between two stable states, a dark state in which the mirror (12) covers a portion of the background (14) and a white state in which the mirror (12) uncovers the background (14). The drive electronics (22, 24, 26) are similar to those used in multiplexed LCDs but are modified in order to drive the micromirrors (12) to one of their two stable states. The micromirrors (12) in the enabled row are attracted up or down with sufficient force to exceed the micromirrors' bistable threshold and deflect the micromirrors to their dark and white states, respectively. The attractive forces on the micromirrors in the remaining non-enabled rows are insufficient to exceed the micromirrors' bistable threshold so that the micromirrors remain in their current stable state.

Dispositif d'affichage mince, pour vision directe, blanc papier, de faible puissance, comprenant un ensemble de micro-miroirs bistables (12) qui sont déviés entre deux états stables, à savoir, un état obscur, dans lequel le miroir (12) recouvre une portion du fond (14), et un état blanc, dans lequel le miroir (12) découvre le fond (22, 24, 26). L'électronique de commande (14) est similaire à celle utilisée dans les LCD multiplexés, mais est modifiée en vue de déplacer les micro-miroirs (12) vers l'un de leurs deux états stables. Les micro-miroirs (12) dans la rangée autorisée, sont attirés vers le haut ou vers le bas avec une force suffisante pour dépasser le seuil bistable des micro-miroirs et dévier les micro-miroirs vers leurs états, respectivement, obscur et blanc. Les forces d'attraction exercées sur les micro-miroirs dans les rangées restantes non autorisées sont insuffisantes pour dépasser le seuil bistable des micro-miroirs, de sorte que les micro-miroirs demeurent dans leur état de stabilité habituel.

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