US5508830A — Liquid crystal display unit having an enclosed sp…

Claim 1

Independent Claim 82 words

A liquid crystal display unit comprising: a frame member having opposing surfaces, at least one polarizer member, a frame member having opposing surfaces, a liquid crystal cell and one of said polarizer members mounted to the opposing surfaces, said frame member defining an enclosed space between said cell and said one of said polarizer members, the frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 2

Dependent Claim 82 words

A liquid crystal display unit comprising: a frame member having opposing surfaces, at least one polarizer member, a frame member having opposing surfaces, a liquid crystal cell and one of said polarizer members mounted to the opposing surfaces, said frame member defining an enclosed space between said cell and said one of said polarizer members, the frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 3

Dependent Claim 88 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, a second polarizer member, and a frame member disposed so as to define an enclosed space at least between said first polarizer member and said at least one liquid crystal cell or between said at least one liquid crystal cell and said second polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 4

Dependent Claim 88 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, a second polarizer member, and a frame member disposed so as to define an enclosed space at least between said first polarizer member and said at least one liquid crystal cell or between said at least one liquid crystal cell and said second polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 5

Dependent Claim 124 words

A liquid crystal projector comprising: a housing; an illumination device including a light source and an illumination optical system and a projection optical system mounted in the housing along an optical axis; a liquid crystal display unit mounted in the housing along the optical axis between the light source and the projection optical system; the liquid crystal display unit, including a frame member, at least one liquid crystal cell and at least one polarizer member mounted to the frame member, said frame member being spaced from the housing and defining an enclosed space between said at least one liquid crystal cell and said at least one polarizer member, said frame member having a vent hole formed therein, and a filter covering said vent hole.

Claim 6

Dependent Claim 124 words

A liquid crystal projector comprising: a housing; an illumination device including a light source and an illumination optical system and a projection optical system mounted in the housing along an optical axis; a liquid crystal display unit mounted in the housing along the optical axis between the light source and the projection optical system; the liquid crystal display unit, including a frame member, at least one liquid crystal cell and at least one polarizer member mounted to the frame member, said frame member being spaced from the housing and defining an enclosed space between said at least one liquid crystal cell and said at least one polarizer member, said frame member having a vent hole formed therein, and a filter covering said vent hole.

Claim 7

Dependent Claim 63 words

The liquid crystal projector of claim 3 wherein the projection optical system has a predetermined focal depth, the space between the at least one liquid crystal cell and said at least one polarizer member along the optical axis being greater than said focal depth, whereby any dust in the space defined by the frame is out of focus during operation of the projector.

Claim 8

Dependent Claim 128 words

A liquid crystal display unit comprising at least one liquid crystal cell, at least one polarizer member, at least one phase correction member, a frame member defining an enclosed space at least between said polarizing member and said liquid crystal cell or between said polarizer member and said phase correction member, said frame member having a vent hole formed in at least a part thereof, a filter disposed in at least a part of said vent hole, said phase correction member being disposed in proximity to said polarizer member or in proximity to said liquid crystal cell, or said phase correction member being bonded to said polarizer member or said liquid crystal cell, or disposed inside the defined space between said polarizer member and said liquid crystal cell.

Claim 9

Dependent Claim 128 words

A liquid crystal display unit comprising at least one liquid crystal cell, at least one polarizer member, at least one phase correction member, a frame member defining an enclosed space at least between said polarizing member and said liquid crystal cell or between said polarizer member and said phase correction member, said frame member having a vent hole formed in at least a part thereof, a filter disposed in at least a part of said vent hole, said phase correction member being disposed in proximity to said polarizer member or in proximity to said liquid crystal cell, or said phase correction member being bonded to said polarizer member or said liquid crystal cell, or disposed inside the defined space between said polarizer member and said liquid crystal cell.

Claim 10

Dependent Claim 105 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, at least one phase correction member and a second polarizer member all disposed in the order named along an optical axis, a frame member defining an enclosed space at least between said first polarizer member and said liquid crystal cell or between said liquid crystal cell and said phase correction member or between said phase correction member and said first polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 11

Dependent Claim 105 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, at least one phase correction member and a second polarizer member all disposed in the order named along an optical axis, a frame member defining an enclosed space at least between said first polarizer member and said liquid crystal cell or between said liquid crystal cell and said phase correction member or between said phase correction member and said first polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 12

Dependent Claim 146 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, a second polarizer member and at least two phase correction members, said first phase correction member being disposed between said first polarizer member and said liquid crystal cell with said second phase correction member being disposed between said liquid crystal cell and said second polarizer member, a frame member defining an enclosed space at least between said first polarizer member and said first phase correction member or between said first phase correction member and said liquid crystal cell or between said liquid crystal cell and said second phase correction member or between said second phase correction member and said second polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter is disposed in at least a part of said vent hole.

Claim 13

Dependent Claim 146 words

A liquid crystal display unit comprising a first polarizer member, at least one liquid crystal cell, a second polarizer member and at least two phase correction members, said first phase correction member being disposed between said first polarizer member and said liquid crystal cell with said second phase correction member being disposed between said liquid crystal cell and said second polarizer member, a frame member defining an enclosed space at least between said first polarizer member and said first phase correction member or between said first phase correction member and said liquid crystal cell or between said liquid crystal cell and said second phase correction member or between said second phase correction member and said second polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter is disposed in at least a part of said vent hole.

Claim 14

Dependent Claim 105 words

A liquid crystal display unit comprising a first polarizer member, at least one phase correction member, at least one liquid crystal cell, and a second polarizer member all disposed in the order named along an optical axis, a frame member defining an enclosed space at least between said second polarizer member and said liquid crystal cell or between said liquid crystal cell and said phase correction member or between said phase correction member and said first polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 15

Dependent Claim 105 words

A liquid crystal display unit comprising a first polarizer member, at least one phase correction member, at least one liquid crystal cell, and a second polarizer member all disposed in the order named along an optical axis, a frame member defining an enclosed space at least between said second polarizer member and said liquid crystal cell or between said liquid crystal cell and said phase correction member or between said phase correction member and said first polarizer member, said frame member having a vent hole formed in at least a part thereof, and a filter disposed in at least a part of said vent hole.

Claim 16

Dependent Claim 29 words

A liquid crystal display unit according to claims 1 or 2 or 5 or 8 further comprising a polarizer member support supporting at least one of said polarizer members.

Claim 17

Dependent Claim 19 words

A liquid crystal display unit according to claim 9 wherein said polarizer member support comprises a heat reflection filter.

Claim 18

Dependent Claim 18 words

A liquid crystal display unit according to claim 9 wherein said polarizer member support is made of plastic.

Claim 19

Dependent Claim 34 words

A liquid crystal display unit according to claim 9 wherein said polarizer member support comprises a liquid crystal, the liquid crystal having molecules with a twist angle equal to or less than 180 degrees.

Claim 20

Dependent Claim 24 words

A liquid crystal display unit according to claim 9, wherein at least one of said polarizer members is bonded to said polarizer member support.

Claim 21

Dependent Claim 18 words

A liquid crystal display unit according to claim 9 wherein said polarizer member support is made of glass.

Claim 22

Dependent Claim 20 words

A liquid crystal display unit according to claim 9 wherein said polarizer member support is supported by said frame member.

Claim 23

Dependent Claim 40 words

A liquid crystal display unit according to claims 1 or 2 or 5 or 8 wherein at least one of said polarizer members is disposed such that a surface thereof constitutes an outside surface of said liquid crystal display unit.

Claim 24

Dependent Claim 38 words

A liquid crystal display unit according to claims 1 or 2 or 5 or 8 wherein one of said polarizer members is disposed such that a surface thereof constitutes an inside surface of said liquid crystal display unit.

Claim 25

Dependent Claim 35 words

A liquid crystal projector comprising the liquid crystal display unit claimed in claims 1, 2, 13, or 8 further including at least a fan for generating an air stream inside said liquid crystal display unit.

Claim 26

Dependent Claim 35 words

A liquid crystal display unit according to claims 5 or 8 wherein said at least one phase correction member is made of a light transmitting material having opposite temperature characteristics to said liquid crystal cell.

Claim 27

Dependent Claim 71 words

A liquid crystal display unit according to claims 5 or 8 wherein said cell and said members are disposed in order named along an optical axis, said liquid crystal cell and said second polarizer member defining a space between them, said phase correction member and said first polarizer member defining a space between them, and said vent hole formed in at least a part of said frame member defining said space.

Claim 28

Dependent Claim 21 words

A liquid crystal display unit according to claims 5 or 8, wherein said phase correction member comprises a liquid crystal cell.

Claim 29

Dependent Claim 21 words

A liquid crystal display unit according to claims 5 or 8, wherein said phase correction member comprises a phase correction film.

Claim 30

Dependent Claim 40 words

A liquid crystal projector comprising said liquid crystal display unit claimed in claims 1, 2, 5, or 8, and further comprising an illumination device, including at least a light source and an illumination optical system, and a projection optical system.

Claim 31

Dependent Claim 48 words

A liquid crystal projector comprising said liquid crystal display unit claimed in claims 1, 2, 5, or 8, wherein said at least one polarizer member is a first polarizer member and said first polarizer member in said liquid crystal display unit is disposed on the light source side.

Claim 32

Dependent Claim 60 words

A liquid crystal projector comprising said liquid crystal display unit claimed in claims 1, 2, 5, or 8, wherein said at least one polarizer member is a first polarizer member, said first polarizer member or said first phase correction member in said liquid crystal display unit is disposed on the light source side with respect to said liquid crystal cell.

Claim 33

Dependent Claim 34 words

A liquid crystal projector comprising said liquid crystal display unit claimed in claims 1, 2, 5, or 8, and further including a fan for generating an air stream for said liquid crystal display unit.

Claim 34

Dependent Claim 45 words

A liquid crystal display device comprising said liquid crystal display unit claimed in claims 1, 2, 5 or 8 and further comprising a heat absorbing filter, an illumination device, said heat absorbing filter being disposed between said illumination device and said liquid crystal display unit,

Claim 35

Dependent Claim 48 words

A liquid crystal display device comprising said liquid crystal display unit claimed in claims 1, 2, 5, or 8 and further comprising a heat absorbing filter, and an illumination optical system, said heat absorbing filter being disposed between said illumination optical system and said liquid crystal display unit,

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1999-04-16	1999-10-16	2000-04-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2003-04-16	2003-10-16	2004-04-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2007-04-16	2007-10-16	2008-04-16	$7700.00	Window Closed / Lapsed

Liquid crystal display unit having an enclosed space between the liquid crystal cell and at least one polarizer

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