Method of driving a display device

• US 4,622,590 A
• Filed: 02/24/1984
• Issued: 11/11/1986
• Est. Priority Date: 02/28/1983
• Status: Expired due to Term

• Current Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Original Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Inventors: Togashi, Seigo
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Toth, E. Anne
• Application Number:
  US06/583,307
• Time in Patent Office: 991 Days
• Field of Search: 358/241, 358/236, 340/784, 340/811, 340/825.89, 340/825.81
• US Class Current: 348/792
• CPC Class Codes: G09G 3/367 with a nonlinear element in series with the liquid crystal cell, e.g. a diode, or M.I.M. element
• CPC Class Codes: H04N 3/12 by switched stationary formation of lamps, photocells or light relays

Abstract

A method of driving an active matrix display device which includes row electrodes, column electrodes, and active elements and display members provided at crossing points of the row and column electrodes and having a storing function is disclosed. According to the method, a serial video signal is stored into the individual column electrodes, and then at a next timing, a group of the active elements corresponding to particular ones of the row electrodes are rendered operative to cause signals to be stored into corresponding ones of the display members. This method thus attains uniform writing, uniform display and simplification of circuitry.

Claims

1. A method of driving a display device which includes row electrodes, column electrodes, and a active elements and display members provided at crossing points of said row and column electrodes and having a storing function, comprising the steps of:

storing at first a serial video signal into individual ones of said column electrodes, and then at a next timing, rendering operative a group of said active elements corresponding to particular ones of said row electrodes, causing signals to be stored into corresponding ones of said display members, further wherein the serial video signal is a signal which has a horizontal retrace period, and rendering operative the group of said active elements during at least part of the horizontal retrace period.

2. A method of driving a display device according to claim 1, wherein the group of said active elements are each constituted from a non-linear resistor element.

3. A method of driving a display device according to claim 1, further applying to each of said column electrodes a capacitance as a dielectric of a liquid crystal so as to reduce influences of noises when video signals are stored at said column electrodes and transmitted to said display device.

4. A method of driving a display device which includes row electrodes, column electrodes, and active elements and display elements provided at crossing points of said row and column electrodes, comprising the steps of:

dividing a video signal into two periods consisting of a first period and a second period during one scanning period, providing in said first period, non-selected scanning signals to said row electrodes and storing said video signal into individual ones of said column electrodes sequentially, providing in said second period, selected scanning signals to particular ones of said row electrodes which render operative a group of said active elements corresponding to the row electrodes thereby causing signals stored in column electrodes to be stored into the corresponding display elements, respectively, further wherein at least a portion of said video signal is a signal having a horizontal retrace period, and rendering operative said group of said active elements during at least part of said horizontal retrace period.