1980-12-12
1983-05-10
Punter, William H.
350332, B02F 1137
Patent
active
043826598
ABSTRACT:
First and second color liquid crystal display elements of the negative guest-host type are disposed in adjacent and opposing relation to each other and the color liquid crystal display elements provide display in different colors, at least one of electrodes of each color liquid crystal display element having formed therein a display pattern. By the control of a changeover switch, an alternating drive voltage is applied from a drive circuit to one of the first and second color liquid crystal display elements to change the color of a background of the display in accordance with the control of the changeover switch.
REFERENCES:
patent: 3828548 (1974-08-01), Martin
patent: 4097130 (1978-06-01), Cole, Jr.
patent: 4137524 (1979-01-01), Chen et al.
patent: 4240709 (1980-12-01), Hornell
patent: 4241339 (1980-12-01), Ushiyama
Ernstoff et al., "Liquid Crystal Pictorial Display" Conf: 1973 Intern. Electron Devices Meeting, Technical Digest, Wash. D.C. USA, 3-5 Dec. 1973, pp. 548-551.
Aoki Shigeo
Hosoda Motomi
Isogami Shuzo
Nagayoshi Tatsuo
Ukai Yasuhiro
Hosiden Electronics Co. Ltd.
Punter William H.
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