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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No:
1131/MAS/1998A
(22) Date of filing of Application:27/05/1998 (43) Publication Date: 09/06/2006
(54) Title of the invention:
LIQUID CRYSTAL DISPLAY DEVICE
(51)International classification:GO2F
01/1335
(31) Priority Document No.09/754,750
(32) Priority Date:24/09/1998
(33) Name of priority country: USA
(87) WIPO No. :
(61) Patent of addition to
Application No. :
Filed on:
(62) Divisional to
Application No.:
Filed on:
(71) Name of Applicant
CENTER FOR LIQUID CRYSTAL
RESEARCH, AN INDIAN SOCIETY
REGISTERED UNDER THE
KARNATAKA SOCIETY
Address of Applicant:
P O BOX 1329, JALAHALLI,
BANGALORE-560 013,
KARNATAKA,
INDIA.
(72) Name of the Inventor(s):
SIVARAMAKRISHNA
CHANDRASEKHAR,
SUBBARAO KRISHNA PRASAD,
GEETHA GOPINATHAN NAIR,
DODDAMANE SREENIVASAMURTHY
SHANKAR RAO,
SANDEEP KUMAR,
MAYANDITHEVAR MANICKAM.
(57)Abstract
This relates to liquid crystal device which comprises (a) pair of transparent substrates held facing each other
with a gap normally employed in such devices, (b) each substrate having on one of its surfaces a coating of a
transparent electrically conducting material which serves as an electrode, (c) an additional layer of a coating of a
polymer on the resulting substrate, (d) a discotic nematic liquid crystal being filled in the gap between the coated
surfaces of the substrates thereby forming a cell, and (e) the cell mounted between a pair of crossed polarizers.
The above device has the following advantages over the conventional TN-liquid crystal display: (i) a wider and
symmetric viewing angle, and (ii) avoidance of the step involving the alignment of the liquid crystal by rubbing or
photo-alignment (iii) considerable reduction in the change in the pixel capacitance between ON and OFF states.
The Patent Office Journal 09/06/2006 10802