Liquid crystal display with a light blocking film of hard carbon

Details Liquid crystal display with a light blocking film of hard carbon Liquid crystal display with a light blocking film of hard carbon

1991-09-30

1992-05-26

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 67, 359 79, 423446, 156DIG68, 428408, 340784, G02F 1133, B32B 900, B01J 306, G09G 336

Patent

active

051172992

ABSTRACT:
Disclosed herein is a liquid crystal display comprising liquid crystal material sandwiched between two substrates, a plurality of picture element electrodes disposed on at least one of the substrates, a lead electrode connected with the picture element electrodes by means of at least one conductor-insulator-conductor device, and a light-shielding layer disposed in a region other than the display region on at least one of the substrates, the insulator being a hard carbon film. The insulator may simultaneously serve as a light-shielding layer, wherein a hard carbon film having a thickness of 1100 to 8000 .ANG., a specific resistivity (.rho.) of 10.sup.6 to 10.sup.13 ohm cm, an optical band gap (Egopt) of 1.0 to 3.0 eV, a hydrogen amount in the film (C.sub.H) of 10 to 50 atom %, an SP.sup.3 /SP.sup.2 ratio of 2-4, a Vickers hardness of 2500 to 9500 kg.multidot.mm.sup.-2, a refractive index (n) of 1.9 to 2.4, a defect density of 10.sup.17 to 10.sup.19 cm.sup.-3, a specific dielectric constant of 2 to 6, and an average optical density in the visible ray region of not less than 0.5 is used.

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