Liquid crystal display apparatus with touch-panel, and touch-panel
AssigneeKaneka Corporation
InventorsSadao Fujii, Keizo Asaoka, Toshihiko Hikida
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Abstract
The touch-panel equipped liquid crystal display apparatus has a polarizing plate, a ¼ wave plate, a touch panel, a ¼ wave plate, and a liquid crystal cell, which are disposed in the above-mentioned order from the display surface side. The arrangement is made such that the polarization axis of the polarizing plate and the slow axis within the film surface of the ¼ wave plate make an angle of 45° substantially, and the slow axis within the film surface of the ¼ wave plate and the polarization axis of the emission light from the liquid crystal cell make an angle of 45° substantially. Further, the slow axes of the ¼ wave plates and are arranged not in parallel with each other, or not cross over at right angles.
Claims9
A touch-panel equipped liquid crystal display apparatus having a display surface comprising:
- a polarizing plate A;
- a ¼ wave plate a having a first film surface and a first slow axis within the first film surface;
- a touch panel;
- a ¼ wave plate B having a second film surface and a second slow axis within the second film surface;
- and a liquid crystal cell that emits a light having a polarization axis extending in a direction, all disposed in the aforementioned order from the display surface, wherein:
- the first slow axis within the first film surface of the ¼ wave plate A is in a horizontal direction of 0° or in a vertical direction of 90° as viewed from the display surface;
- the second slow axis within the second film surface of the ¼ wave plate B is substantially at a diagonal position to the direction in which the polarization axis of the light emitted from the liquid crystal cell extends;
- and
- the first slow axis of the ¼ wave plate A and the second slow axis of the ¼ wave plate B are nonparallel with each other without crossing at right angles.
Dependencies are inferred from the claim text.