Display device using electro-optic plate and a membrane switch

A display apparatus comprising:

• a light-transmitting ceramic plate having an electrooptic effect;
• a polarizing plate provided on an upper surface of said ceramic plate;
• a flexible sheet facing a lower surface of said ceramic plate with a predetermined gap therebetween and comprising:
• a transparent film having on an upper surface thereof a plurality of transparent striped electrodes;
• a polarizing film provided on a lower surface of said transparent film so that the axis of polarization of said polarizing film is aligned with that of said polarizing plate;
• and a reflection film provided on a lower surface of said polarizing film;
• and
• a pressure application head extending in a direction parallel to said flexible sheet and perpendicular to said striped electrodes and movable in a direction parallel to said striped electrodes, said pressure application head being either always or intermittently pressed onto a lower surface of said flexible sheet so as to allow said striped electrodes to be locally in contact with said lower surface of said ceramic plate.

A display apparatus comprising:

• a light-transmitting ceramic plate having an electrooptic effect;
• a first polarizing film provided on a lower surface of said ceramic plate;
• a reflection film provided on a lower surface of said first polarizing film;
• a flexible sheet facing an upper surface of said ceramic plate with a predetermined gap therebetween and comprising:
• a transparent film having on a lower surface thereof a plurality of transparent striped electrodes;
• and a second polarizing film provided on an upper surface of said transparent film so that the axis of polarization thereof is aligned with that of said first polarizing film;
• and
• a pressure application head extending in a direction parallel to said transparent film and perpendicular to said striped electrodes and movable in direction parallel to said striped electrodes, said pressure application head being either always or intermittently pressed onto an upper surface of said flexible sheet so as to allow said striped electrodes to be locally in contact with said upper surface of said ceramic plate.

A display apparatus comprising:

• a light-transmitting ceramic plate having an electrooptic effect;
• a first flexible sheet facing a lower surface of said ceramic plate with a predetermined gap therebetween and comprising:
• a first transparent film having on an upper surface thereof a plurality of first transparent striped electrodes;
• a first polarizing film provided on a lower surface of said first transparent film;
• and a reflection film provided on a lower surface of said first polarizing film;
• a second flexible sheet facing an upper surface of said ceramic plate with a predetermined gap therebetween and comprising:
• a second transparent film having on a lower surface thereof a plurality of second transparent striped electrodes extending in a same direction as said first transparent striped electrodes;
• and a second polarizing film provided on an upper surface of said second transparent film so that the axis of polarization thereof is aligned with that of said first polarizing film;
• and
• a pressure application head having:
• a first head element extending in a direction parallel to said first flexible film and perpendicular to said first transparent striped electrodes and being either always or intermittently pressed onto a lower surface of said first flexible sheet so as to allow said first transparent striped electrodes to be locally in contact with said lower surface of said ceramic plate;
• and a second head element disposed in parallel with said first head element right above said first head element and being either always or intermittently pressed onto an upper surface of said second flexible sheet so as to allow said second transparent striped electrodes to be locally in contact with said upper surface of said ceramic plate, said pressure application head being movable in a direction parallel to said transparent striped electrodes.