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Claims  |
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What is claimed is:
1. A liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the input side polarization plate and the output side polarization
plate are arranged in such a way that said liquid crystal display
apparatus is of a NW mode;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate;
wherein the phase difference element has a retardation smaller than 50 nm
and larger than a phase difference of the liquid crystal cell when the
liquid crystal cell has a voltage of a given size applied thereto to
provide a black display; and
wherein the direction of the phase advancing axis of the phase difference
element relative to the polarization axis of the input side polarization
plate is defined by an angle .alpha. which satisfies the following
equation
Q=sin 2.alpha. sin .delta./(1+(1-sin.sup.2 .alpha. sin.sup.2
.delta.).sup.1/2),
where
Q=elliptical index of the liquid crystal cell; and .delta.=a phase
difference of the phase difference element.
2. A liquid crystal display apparatus according to claim 1, wherein the
liquid crystal molecule in contact with the input side pixel electrode has
its molecular axis aligned in a direction parallel to a display face or in
a direction perpendicular to the display face.
3. A liquid crystal display apparatus according to claim 1, wherein the
phase difference element is separated from the liquid crystal cell, the
input side polarization plate and the output side polarization plate; and
the phase advancing axis of the phase difference element is variable in
direction.
4. A liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein the phase difference element comprises a transparent resin film and
is optically connected, through said transparent body, to the one of said
input and output side polarization plates and the one of said input and
output side transparent substrates disposed on the same side of said
liquid crystal cell as said phase difference element.
5. A liquid crystal display apparatus according to claim 4, wherein the
transparent body comprises an elastic material, and the phase difference
element is rotatable within a given angular range relative to a device
connected to the transparent body.
6. A liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and retardation at a given wave length is different for each area.
7. A liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and a direction of a phase advancing axis is different for each area.
8. A liquid crystal display projection apparatus comprising a light source,
a liquid crystal display apparatus for forming an optical image in
response to a video signal upon receiving an output light from the light
source, and a projection lens for projecting the optical image on a screen
upon receiving an output light from the liquid crystal display apparatus,
said liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the input side polarization plate and the output side polarization
plate are arranged in such a way that said liquid crystal display
apparatus is of a NW mode;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate;
wherein the phase difference element has a retardation smaller than 50 nm
and larger than a phase difference of the liquid crystal cell when the
liquid crystal cell has a voltage of a given size applied thereto to
provide a black display; and
wherein the direction of the phase advancing axis of the phase difference
element relative to the polarization axis of the input side polarization
plate is defined by an angle .alpha. which satisfies the following
equation
Q=sin 2.alpha. sin .delta./(1+(1-sin.sup.2 .alpha. sin.sup.2
.delta.).sup.1/2),
where
Q=elliptical index of the liquid crystal cell; and .delta.=a phase
difference of the phase difference element.
9. A liquid crystal display projection apparatus according to claim 8,
wherein the projection lens receives rays of main light emitted from
various pixels of the liquid crystal display apparatus, said rays of main
light being nearly parallel to each other.
10. A liquid crystal display projection apparatus according to claim 8,
wherein the liquid crystal molecule in contact with the input side pixel
electrode has its molecular axis aligned in a direction parallel to a
display face or in a direction perpendicular to the display face.
11. A liquid crystal display projection apparatus according to claim 8,
wherein said liquid crystal display apparatus is perpendicular relative to
the light axis of the light source and the projection lens.
12. A liquid crystal display projection apparatus according to claim 8,
wherein the phase difference element is separated from the liquid crystal
cell, the input side polarization plate and the output side polarization
plate; and
the phase advancing axis of the phase difference element is variable in
direction.
13. A liquid crystal display projection apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal upon receiving an output light from the light
source, and a projection lens for projecting the optical image on a screen
upon receiving an output light from the liquid crystal display apparatus,
said liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein the phase difference element is optically connected, through the
transparent body, to the one of said input and output side polarization
plates and the one of said input and output side transparent substrates
disposed on the same side of said liquid crystal cell as said phase
difference element.
14. A liquid crystal display projection apparatus according to claim 13,
wherein the transparent body comprises an elastic material, and the phase
difference element is rotatable within a given angular range relative to a
device connected to the transparent body.
15. A liquid crystal display projection apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal upon receiving an output light from the light
source, and a projection lens for projecting the optical image on a screen
upon receiving an output light from the liquid crystal display apparatus,
said liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and retardation at a given wave length is different for each area.
16. A liquid crystal display projection apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal upon receiving an output light from the light
source, and a projection lens for projecting the optical image on a screen
upon receiving an output light from the liquid crystal display apparatus,
said liquid crystal display apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and a direction of a phase advancing axis is different for each area.
17. A liquid crystal display projection apparatus comprising
a light source for emitting light including color components of three
principal colors,
color decomposition means for decomposing the emitted light from the light
source into lights of the three principal colors,
three liquid crystal display apparatuses for respectively receiving the
lights of the three principal colors from the color decomposition means,
and for forming an optical image in response to a video signal,
light synthesizing means for synthesizing light emitted from the three
liquid crystal display apparatuses,
a projection lens for receiving light emitted from the light synthesizing
means and projecting the optical image on a screen, wherein each of said
three liquid crystal display apparatuses comprises:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the input side polarization plate and the output side polarization
plate are arranged in such a way that said liquid crystal display
apparatus is of a NW mode;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate;
wherein the phase difference element has a retardation smaller than 50 nm
and larger than a phase difference of the liquid crystal cell when the
liquid crystal cell has a voltage of a given size applied thereto to
provide a black display; and
wherein the direction of the phase advancing axis of the phase difference
element relative to the polarization axis of the input side polarization
plate is defined by an angle .alpha. which satisfies the following
equation
Q=sin 2.alpha. sin .delta./(1+(1-sin.sup.2 .alpha. sin.sup.2
.delta.).sup.1/2),
where
Q=elliptical index of the liquid crystal cell; and .delta.=a phase
difference of the phase difference element.
18. A liquid crystal display projection apparatus according to claim 17,
wherein the projection lens receives rays of main light emitted from
various pixels of the liquid crystal display apparatus, said rays of main
light being nearly parallel to each other.
19. A liquid crystal display projection apparatus according to claim 17,
wherein the liquid crystal molecule in contact with the input side pixel
electrode has its molecular axis aligned in a direction parallel to a
display face or in a direction perpendicular to the display face.
20. A liquid crystal display projection apparatus according to claim 17,
wherein said liquid crystal display apparatus is perpendicular relative to
the light axis of the light source and the projection lens.
21. A liquid crystal display projection apparatus according to claim 17,
wherein the phase difference element is separated from the liquid crystal
cell, the input side polarization plate and the output side polarization
plate; and
the phase advancing axis of the phase difference element is variable in
direction.
22. A liquid crystal display projection apparatus comprising
a light source for emitting light including color components of three
principal colors,
color decomposition means for decomposing the emitted light from the light
source into lights of the three principal colors,
three liquid crystal display apparatuses for respectively receiving the
lights of the three principal colors from the color decomposition means,
and for forming an optical image in response to a video signal,
light synthesizing means for synthesizing light emitted from the three
liquid crystal display apparatuses,
a projection lens for receiving light emitted from the light synthesizing
means and projecting the optical image on a screen, wherein each of said
three liquid crystal display apparatuses comprises:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein the phase difference element is optically connected, through the
transparent body, to the one of said input and output side polarization
plates and the one of said input and output side transparent substrates
disposed on the same side of said liquid crystal cell as said phase
difference element.
23. A liquid crystal display projection apparatus according to claim 22,
wherein the transparent body comprises an elastic material, and the phase
difference element is rotatable within a given angular range relative to a
device connected to the transparent body.
24. A liquid crystal display projection apparatus comprising
a light source for emitting light including color components of three
principal colors,
color decomposition means for decomposing the emitted light from the light
source into lights of the three principal colors,
three liquid crystal display apparatuses for respectively receiving the
lights of the three principal colors from the color decomposition means,
and for forming an optical image in response to a video signal,
light synthesizing means for synthesizing light emitted from the three
liquid crystal display apparatuses,
a projection lens for receiving light emitted from the light synthesizing
means and projecting the optical image on a screen, wherein each of said
three liquid crystal display apparatuses comprises:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and retardation at a given wave length is different for each area.
25. A liquid crystal display projection apparatus comprising
a light source for emitting light including color components of three
principal colors,
color decomposition means for decomposing the emitted light from the light
source into lights of the three principal colors,
three liquid crystal display apparatuses for respectively receiving the
lights of the three principal colors from the color decomposition means,
and for forming an optical image in response to a video signal,
light synthesizing means for synthesizing light emitted from the three
liquid crystal display apparatuses,
a projection lens for receiving light emitted from the light synthesizing
means and projecting the optical image on a screen, wherein each of said
three liquid crystal display apparatuses comprises:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and a direction of a phase advancing axis is different for each area.
26. A liquid crystal display projection apparatus comprising a cabinet, a
transmission screen arranged at a front of the cabinet, a light source, a
liquid crystal display apparatus for forming an optical image in response
to a video signal upon receiving an output light from the light source,
and a projection lens for projecting the optical image on the screen upon
receiving an output light from the liquid crystal display apparatus, said
light source, said liquid crystal display apparatus, and said projection
lens being accommodated in said cabinet, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the input side polarization plate and the output side polarization
plate are arranged in such a way that said liquid crystal display
apparatus is of a NW mode;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate;
wherein the phase difference element has a retardation smaller than 50 nm
and larger than a phase difference of the liquid crystal cell when the
liquid crystal cell has a voltage of a given size applied thereto to
provide a black display; and
wherein the direction of the phase advancing axis of the phase difference
element relative to the polarization axis of the input side polarization
plate is defined by an angle .alpha. which satisfies the following
equation
Q=sin 2.alpha. sin .delta./(1+(1-sin.sup.2 .alpha. sin.sup.2
.delta.).sup.1/2),
where
Q=elliptical index of the liquid crystal cell; and .delta.=a phase
difference of the phase difference element.
27. A liquid crystal display projection apparatus according to claim 26,
wherein the projection lens receives rays of main light emitted from
various pixels of the liquid crystal display apparatus, said rays of main
light being nearly parallel to each other.
28. A liquid crystal display projection apparatus according to claim 26,
wherein the liquid crystal molecule in contact with the input side pixel
electrode has its molecular axis aligned in a direction parallel to a
display face or in a direction perpendicular to the display face.
29. A liquid crystal display projection apparatus according to claim 26,
wherein said liquid crystal display apparatus is perpendicular relative to
the light axis of the light source and the projection lens.
30. A liquid crystal display projection apparatus according to claim 26,
wherein the phase difference element is separated from the liquid crystal
cell, the input side polarization plate and the output side polarization
plate; and
the phase advancing axis of the phase difference element is variable in
direction.
31. A liquid crystal display projection apparatus comprising a cabinet, a
transmission screen arranged at a front of the cabinet, a light source, a
liquid crystal display apparatus for forming an optical image in response
to a video signal upon receiving an output light from the light source,
and a projection lens for projecting the optical image on the screen upon
receiving an output light from the liquid crystal display apparatus, said
light source, said liquid crystal display apparatus, and said projection
lens being accommodated in said cabinet, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein the phase difference element is optically connected, through the
transparent body, to the one of said input and output side polarization
plates and the one of said input and output side transparent substrates
disposed on the same side of said liquid crystal cell as said phase
difference element.
32. A liquid crystal display projection apparatus according to claim 31,
wherein the transparent body comprises an elastic material, and the phase
difference element is rotatable within a given angular range relative to a
device connected to the transparent body.
33. A liquid crystal display projection apparatus comprising a cabinet, a
transmission screen arranged at a front of the cabinet, a light source, a
liquid crystal display apparatus for forming an optical image in response
to a video signal upon receiving an output light from the light source,
and a projection lens for projecting the optical image on the screen upon
receiving an output light from the liquid crystal display apparatus, said
light source, said liquid crystal display apparatus, and said projection
lens being accommodated in said cabinet, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and retardation at a given wave length is different for each area.
34. A liquid crystal display projection apparatus comprising a cabinet, a
transmission screen arranged at a front of the cabinet, a light source, a
liquid crystal display apparatus for forming an optical image in response
to a video signal upon receiving an output light from the light source,
and a projection lens for projecting the optical image on the screen upon
receiving an output light from the liquid crystal display apparatus, said
light source, said liquid crystal display apparatus, and said projection
lens being accommodated in said cabinet, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate; and
wherein said phase difference element is divided into a plurality of areas,
and a direction of a phase advancing axis is different for each area.
35. A liquid crystal display view finder apparatus comprising a light
source, a condenser lens for leading emitted light from the light source,
a liquid crystal display apparatus for forming an optical image in
response to a video signal, and an eyepiece for receiving light emitted
from the liquid crystal display apparatus and for converting the optical
image into an enlarged virtual image, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate; and
wherein a direction of a phase advancing axis of the phase difference
element relative to the polarizing axis of the input side polarization
plate is such that the phase difference element minimizes the
transmissivity of an optical system defined from the input side
polarization plate to the output side polarization plate when the liquid
crystal cell has a given voltage applied thereto and receives the light
from a given direction.
36. A view finder according to claim 35, wherein an aperture is disposed
between the light source and the condenser lens.
37. A liquid crystal display view finder apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal, and an eyepiece for receiving light emitted
from the liquid crystal display apparatus and for converting the optical
image into an enlarged virtual image, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element disposed between the input side polarization
plate and the output side polarization plate;
wherein the input side polarization plate and the output side polarization
plate are arranged in such a way that said liquid crystal display
apparatus is of a NW mode;
wherein the polarizing axis of the input side polarization plate is
parallel or perpendicular to the molecular long axis of a liquid crystal
molecule in contact with the input side transparent substrate;
wherein the phase difference element has a retardation smaller than 50 nm
and larger than a phase difference of the liquid crystal cell when the
liquid crystal cell has a voltage of a given size applied thereto to
provide a black display; and
wherein the direction of the phase advancing axis of the phase difference
element relative to the polarization axis of the input side polarization
plate is defined by an angle .alpha. which satisfies the following
equation
Q=sin 2.alpha. sin .delta./(1+(1-sin.sup.2 .alpha. sin.sup.2
.delta.).sup.1/2),
where
Q=elliptical index of the liquid crystal cell; and .delta.=a phase
difference of the phase difference element.
38. A liquid crystal display view finder apparatus according to claim 37,
wherein the liquid crystal molecule in contact with the input side pixel
electrode has its molecular axis aligned in a direction parallel to a
display face or in a direction perpendicular to the display face.
39. A liquid crystal display view finder apparatus according to claim 37,
said liquid crystal display apparatus is perpendicular relative to the
light axis of the light source and the projection lens.
40. A liquid crystal display view finder apparatus according to claim 37,
wherein the phase difference element is separated from the liquid crystal
cell, the input side polarization plate and the output side polarization
plate; and
the phase advancing axis of the phase difference element is variable in
direction.
41. A liquid crystal display view finder apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal, and an eyepiece for receiving light emitted
from the liquid crystal display apparatus and for converting the optical
image into an enlarged virtual image, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
transparent substrates and having twist nematic liquid crystal of a twist
angle of 90.degree. inserted therein;
an input side polarization plate attached to an input side of the liquid
crystal cell;
an output side polarization plate attached to an output side of the liquid
crystal cell; and
a phase difference element and a transparent body disposed between the
input side polarization plate and the output side polarization plate; and
wherein the phase difference element is optically connected, through the
transparent body, to the one of said input and output side polarization
plates and the one of said input and output side transparent substrates
disposed on the same side of said liquid crystal cell as said phase
difference element.
42. A liquid crystal display view finder apparatus according to claim 41,
wherein the transparent body comprises an elastic material and the phase
difference element is rotatable within a given angular range relative to a
device connected to the transparent body.
43. A liquid crystal display view finder apparatus comprising a light
source, a liquid crystal display apparatus for forming an optical image in
response to a video signal, and an eyepiece for receiving light emitted
from the liquid crystal display apparatus and for converting the optical
image into an enlarged virtual image, said liquid crystal display
apparatus comprising:
an input side transparent substrate having an input side pixel electrode
formed thereon;
an output side transparent substrate having an output side pixel electrode
formed thereon;
a liquid crystal cell disposed between the input side and output side
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