Matrix type liquid crystal display panel
Electro-optical analog digital display
Matrix electrode structure in a multi-layer matrix type liquid crystal display
Fail transparent LCD display with backup
Heating device with separate display means for the types of data entered Patent #: 4399352
ApplicationNo. 06/458084 filed on 01/14/1983
US Classes:345/4, SINGLE DISPLAY SYSTEM HAVING STACKED SUPERIMPOSED DISPLAY DEVICES (E.G., TANDEM)345/50, Liquid crystal elements349/83With each cell displaying a different pattern
ExaminersPrimary: Curtis, Marshall M.
Attorney, Agent or Firm
International ClassesG09G 3/36 (20060101)
G02F 1/13 (20060101)
G02F 1/1347 (20060101)
G02F 1/1345 (20060101)
AbstractTwo levels of liquid crystal material and upper, center and lower transparent members are sandwiched to form a stacked display. Segment electrodes, which are disposed on opposite sides of the center transparent member, are controllable to selectively display information in one of the two levels while the other level is caused to remain transparent. By applying different waveforms to the levels, one level can be energized while the other is held inactive.