Active matrix display devices having bidirectional non-linear de

Details Active matrix display devices having bidirectional non-linear de Active matrix display devices having bidirectional non-linear de

1994-07-26

1996-02-06

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 60, G02F 1136

Patent

active

054900026

ABSTRACT:
An active matrix display device comprises an array of display elements (12), e.g. liquid crystal display elements, connected between sets of row and column address conductors (22,24). A display element electrode (20) is connected to an associated address conductor (22) of one set via two, parallel, switch means each of which comprises at least two, two-terminal, bi-directional, non-linear devices (30), for example, MIM type thin film diode devices, connected in series. A bidirectional, non-linear device (e.g. 30b) of each switch means (e.g. 30a, 30b) is shared by, and comprises a part of, a switch means (e.g. 30b, 30e) associated with a respective adjacent display element, there being in each switch means at least one non-linear device (e.g. 30a) between the shared device (30b) and the display element electrode (20). In addition to providing fault tolerance in the event of a defective, open-circuit, device (30), the arrangement also allows any defective, short-circuit, device to be easily identified and removed.

REFERENCES:
patent: 4642620 (1987-02-01), Togashi et al.
patent: 5025250 (1991-06-01), Hains
patent: 5069534 (1991-03-01), Hirai
patent: 5101288 (1992-03-01), Ohta et al.
patent: 5161237 (1992-11-01), Hartman et al.
patent: 5234541 (1993-08-01), Shannon et al.
"Flicker-Free LCD With Bridge-Structure SiN.sub.x TFD," by Y. Hirai et al., SID 90 Digest, pp. 522-525.

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