Liquid crystal display having light deflecting element on a surface of a substrate, facing the liquid crystal cell

US6396552B1 · kind B1 · utility

Assignee

• Mannesmann VDO AG · DE

Inventors

• Peter Brandt · Berghausen, DE
• Dietmar Tippl · Kelkheim, DE

Key dates

• Filing date: Jun 8, 2000
• Grant date: May 28, 2002
• Expiry date: Jun 8, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133616
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a liquid crystal display (1), a laterally arranged light coupling surface (2) permits the active illumination of the liquid crystal display (1) by a light source (3). For this purpose, the liquid crystal display (1) has a light deflecting element (7) which deflects the incident optical radiation in the direction of a liquid crystal cell (5). The light polarized by means of a rear polarization filter (9) is reflected at a rear, reflective element (10) and deflected into the liquid crystal cell (1). The segmented display is therefore produced on a front side (14) of the liquid crystal display (1), provided with a front polarization filter (13). By contrast with known liquid crystal displays having a transflector, it is thereby possible substantially to reduce a possible color deviation and the limited readability associated therewith. At the same time, the cost of production and the overall space required are substantially reduced.