Method of manufacturing a liquid-crystal display device
OwnerPeter Van De Witte, Johannes Van Haaren +2inventors
InventorsPeter Van De Witte, Johannes Van Haaren, Rifat Hikmet, Dirk Broer
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Abstract
A method of forming a liquid-crystal display device having a display cell comprises forming retardation foils on substrattes using polymerized or vitrified liquid-crystal material wherein the liquid-crystal molecules of the polymerized or vitrified liquid-crystal material have a tilt angle with respect to a plane parallel to the substrates and so that the retardation foils have substantially complementary indicatrices and so that each one of the retardation foils brings about the compensation of approximately half the display cell in the driven state.
Claims29
A method of manufacturing a retardation foil, characterized in that a liquid-crystalline mixture in the smectic C-phase between two homeotropically aligning substrates is cured by means of polymerization.
A method of manufacturing a liquid-crystal display device having a display cell comprising:
- forming a layer of a nematic, liquid-crystal material so as to have a twist angle which lies in a range of 60-120 degrees, between two substantially parallel substrates;
- forming first and second polarizers so as to have first and second polarizing directions and arranging the first and second polarizers on at least one of the substrates;
- and
- forming first and second retardation foils in a predetermined relationship with the first and second polarizers, and so that the first and second retardation foils respectively comprise polymerized or vitrified liquid-crystalline material comprising liquid-crystal molecules which are respectively arranged to:
- a) have average orientations which respectively extend in first and second directions which directions are respectively parallel to first and second planes that are normal to the substrates, the first and second planes being oriented with respect to one another at an angle in a range of 60 to 120 degrees;
- and
- b) exhibit first and second average tilt angles relative to the substrates.
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A method of forming a liquid-crystal display device having a display cell comprising:
- forming retardation foils on substrates using polymerized or vitrified liquid-crystal material wherein the liquid-crystal molecules of the polymerized or vitrified liquid-crystal material have a tilt angle with respect to a plane parallel to the substrates and so that the retardation foils have substantially complementary indicatrices and so that each one of the retardation foils brings about the compensation of approximately half the display cell in the driven state.
Dependencies are inferred from the claim text.