Patent ID: 6266114
Filing Date: 2001-07-24
Classification: G02F

Abstract:
A display apparatus comprising:a first polarizer having a first polarizer absorption axis from 30.degree. to 60.degree. from a predetermined reference;a first O-plate, optically in series with said first polarizer, said first O-plate having a first O-plate retardation range from +70 nm to +140 nm, and having a first O-plate optical axis oriented between 30.degree. and 60.degree. from said predetermined reference, said first O-plate having said optical axis inclined with a low tilt at an angle of 2.degree. to 10.degree. and a high tilt angle of 30.degree. to 60.degree.;a second O-plate, optically in series with said first O-plate, and having a second O-plate retardation range from +70 nm to +140 nm and a second O-plate optical axis oriented between 120.degree. and 150.degree. from said predetermined reference, said second O-plate optical axis inclined with a low tilt at an angle of 2.degree. to 10.degree. and a high tilt angle of 30.degree. to 60.degree.;a first A-plate, optically in series with said second O-plate, said first A-plate having a first A-plate retardation range from +30 nm to +180 nm, a first A-plate optical axis oriented between 30.degree. and 60.degree. from said predetermined reference, and having said optical axis inclined from 0.degree. to 10.degree.;a liquid crystal material, optically in series with said first A-plate, said liquid crystal material having a liquid crystal retardation range from +300 nm to +500 nm, a front surface rub angle in a range from 30.degree. to 60.degree., a back surface rub angle in a range from 285.degree. to 345.degree.; anda second polarizer, optically in series with said second liquid crystal material, said second polarizer having an absorption axis of 120.degree. to 150.degree..