Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Chimei Innolux Corporation

Peter Van De Witte

Dirk Jan Broer

Sjoerd Stallinga

Rifat Ata Mustafa Hikmet

Johan Lub

Hugo Johan Cornelissen

Johannes A M M Van Haaren

Michael Geoffrey Pitt

Johannes A Van Haaren

Frans Leenhouts

Joost Peter Andr&eacute; Vogels

The invention relates to a transflective LCD incorporating a partial mirror () as the transflector. In the transmissive display mode, light from a backlight system () passes apertures () in the transflector (). According to the invention, recycling of light to the backlight system () is improved by substantially only polarizing light that passes an aperture. This is achieved by means of a patterned polarizer () extending over the apertures in the partial mirror.

Transflective LCD display device comprising a patterned polarizer, display having the same, and method having the same

A method of manufacturing a compensator layer features forming first and second retardation foils by polymerizing or vitrifying liquid-crystalline material comprising liquid-crystal molecules in manner wherein the liquid-crystal molecules in the polymerized or vitrified liquid-crystalline material of the first and second retardation foils respectively exhibit first and second tilt angles which are respectively parallel to first and second planes that are normal to major surfaces of the foils and that are angled with respect to one another by an angle of 60&#x2013;120 degrees.

Method of manufacturing a compensator layer with retardation foils exhibiting tilt angles parallel to planes normal to the foils and angled with respect to one another

An article has transferred onto its surface a region-wise optically modified cholesteric liquid crystalline layer. The layer includes at least one single-film layer including a number of regions having cholesterically ordered material which differ from one another in pitch. The layer can include a holographic image.

Article with optically modified cholesteric liquid crystal layer

In a method of manufacturing a liquid crystal device including a layer having a fixed cholesteric order, the patterned layer is manufactured by providing a layer comprising polymerizable cholesterically ordered material and a compound convertible by means of radiation from a non-converted to converted state. The pitch of the cholesterically ordered material is influenced by the compound in its converted state to a different extent than in its converted state. The polymerizable layer is then irradiated pattern-wise thus creating regions of different pitch. The irradiated layer is then polymerized and/or cross-linked to fix the cholesteric order thus obtained.

Liquid crystal display device with reflective material that hides switching material

In a normally black double cell, grey scale enhancement is obtained by dividing pixels in the driving cell into sub-pixels which are rotated preferably through 180&#xb0; with respect to each other.

Liquid crystal display device

This invention relates to a liquid crystal display device, comprising at least one retardation film ( ), a nematic liquid crystal layer ( ), and a light reflecting RGB patterned cholesteric color filter ( ), for reflecting either essentially left-circular or right-circular polarized light, being characterized in that said liquid crystal layer ( ) is a super twisted nematic liquid crystal layer having a twist angle in the interval 180-270 degrees, and in that the summed retardation R of the retardation film or retardation films and the liquid crystal layer is equal to approximately R&equals;(3&plus;2n)&lgr;/4, where n&equals;0,1,2,3 . . . .

Liquid crystal reflective display

The invention relates to a liquid-crystal display device comprising a display cell and a plurality of retardation foils of polymerized or vitrified liquid-crystal material, whose liquid-crystal molecules have a tilt angle with respect to a plane parallel to the substrates, which retardation foils have substantially complementary indicatrices so that each one of the retardation foils brings about the compensation of approximately half the display cell in the driven state.

Liquid crystal display device, compensator layer and method of manufacturing a retardation foil

Transflective display device has an optical waveguide commonly known as a light guide. The guide includes areas having a chiral nematic structure which splits light coming in from aside into two light beams having a mutually opposite circular polarization. Polarization splitting is achieved at the interface of the areas having the chiral nematic structure.

Display device with light guide having polarizing material with regions converted into isotropic material

The invention relates to a method of providing a decorative coating or text or the like on articles, like shavers, GSM's, cards, etc. The coating comprises a region-wise optically modified (patterned) cholesteric liquid crystalline layer, which is transferred onto a surface of the article by means of a transfer operation. The so-called in-mold decoration technique has been found to be very advantageous for the transfer of decorative (patterned) cholesteric liquid crystalline layers. In this technique the layer is (releasably) deposited on a plastic carrier foil and provided with a layer of adhesive. The assembly is inserted in an injection mold before the injection molding of polymer material starts. In this way decorative coatings (e.g. multi color images) and texts or the like can be even applied onto, non-even and slightly curved substrates.

Method for providing a surface of an article with a decoration or text

In a normally black double cell, grey scale enhancement is obtained by dividing pixels in the driving cell into sub-pixels which are rotated preferably through 180&deg; with respect to each other.

LCD having a compensator directly on the substrate of adjacent LC cell having particular subpixels

A light-modulating cell and a display device based on a chiral nematic liquid crystal material in which the difference of optical rotation power between the planar nematic state and the focal conic state is used for discriminating between optical states, in particular for chiral nematic liquid crystal material having a pitch length associated with infrared light.

Light-modulating cell

Liquid crystal display device with patterned layer having fixed cholesteric order and method of manufacturing the same

In normally black double cells, the viewing angle (especially for DSTN) is increased by adding a retardation foil, having its optical axis parallel to an optical axis of the analyzer.

Display device

Patterned layer of a polymer material having a cholesteric order

Transflective display device provided with an optical waveguide which splits light coming in from aside into two light beams having a mutually opposite circular polarization. Polarization splitting is achieved at the interface of areas in the optical waveguide having a chiral nematic structure.

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Heerlen, Netherlands

Peter Van De Witte