Liquid crystal display device for camera

Claim 1

A liquid crystal display device for a camera comprising: (a) a crystal cell, said cell including a first and a transparent second basic plate, on each of which plate a plural number of transparent electrodes are provided so as to form in rows a plural number of electrode pairs to be lit on both sides of the liquid crystal matter; (b) pulse generating means, said means generating a first alternating voltage with amplitude V1, a first reversed alternating voltage in the reversed phase to that of the first alternating voltage, a second alternating voltage with amplitude V3 in the same phase as that of the first alternating voltage, and a second reversed alternating voltage in the reversed phase to that of the second alternating voltage, whereby, the first alternating voltage V1 is larger than the effective voltage value for lighting the crystal cell, while V3 as well as (V1-2V3) are smaller than the effective voltage value; (c) gate means, said means applying the first alternating voltage wave to the transparent electrodes out of those provided on the first transparent basic plate, the second reversed alternating voltage wave to other electrode on the first transparent basic plate, the first reversed alternating voltage wave to the selected transparent electrodes on the second transparent basic plate and the second alternating voltage to other transparent electrodes on the second transparent basic plate in accordance with the input signal; and (d) input change over means, said means changing over a plural number of input signal groups at every determined time so as to selectively delivering the input signal group to the gate means in a time dividing way in such a manner that a plural number of the electrode pairs out of those in rows in the liquid crystal cell can be lit visually at the same time.