Unbalance vector display device and process Patent #: 3938134
ApplicationNo. 05/737794 filed on 11/01/1976
US Classes:345/87, Liquid crystal display elements (LCD)340/825.68, Shift register345/440.1Real-time waveform display
ExaminersPrimary: Curtis, Marshall M.
Attorney, Agent or Firm
International ClassesG01R 13/34 (20060101)
G01R 13/22 (20060101)
G01R 13/40 (20060101)
G02F 1/13 (20060101)
G02F 1/1343 (20060101)
G01R 13/00 (20060101)
Foreign Application Priority Data1975-11-05 GB
AbstractAn electronic analogue waveform display comprises a liquid crystal cell having x, y electrodes whereby the cell is addressed in a matrix manner by applying electric potentials of about zero at required x, y intersections and above a threshold voltage at all other intersections. A waveform to be displayed is divided into a series of amplitude samples and electrical potentials representative of these samples are applied to the x, y electrodes while a series of electric potentials are applied to x electrodes. Rectangular or sinusoidal waveforms may be applied to the x, y electrodes. Various circuits for producing a display are disclosed.