Appeal No. 1998-1993
Application 08/320,729
display device wherein data signals are supplied to the liquid
crystal cells through a plurality of field effect transistors
arranged in a plurality of picture elements. The invention is
primarily directed to details of the field effect transistors.
Representative claim 44 is reproduced as follows:
44. A liquid crystal device wherein data signals are
supplied to liquid crystal cells through a plurality of field
effect transistors arranged in a plurality of picture
elements, each of said field effect transistors comprising:
a channel region comprising a thin film of silicon;
a gate insulating film in contact with the channel
region; and
a gate electrode in contact with the gate insulating film
and opposing the channel region, wherein a leakage current of
the field effect transistor in the OFF state is dependent on
the thickness of the channel region, and the channel region
has a thickness less than 2500A so that when the field effect
transistor is in the OFF state, the leakage current flowing
through the field effect transistor is less than 1/10 of the
leakage current flowing through a corresponding liquid crystal
cell based on a resistance of the liquid crystal cells and an
area of the picture elements.
The examiner relies on the following references:
Asars et al. (Asars) 4,112,333 Sep. 05, 1978
Morozumi 4,582,395 Apr. 15, 1986
Mano et al. (Mano) 5,124,768 June 23, 1992
Holmberg et al. (Holmberg) 2,067,353 July 22, 1981
(UK Patent Application)
Togashi 2,070,857 Sep. 09, 1981
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007