US5157526A — Unabsorbing type polarizer, method for manufactur…

Claim 1

Independent Claim 208 words

An apparatus for display comprising: a polarized light source, a liquid crystalline display device, and a means for focusing an image, which is formed by the liquid crystalline display device, on a screen, characterized in that said polarized light source comprises a light source generating unpolarized light or weakly polarized light, and a polarizer for providing highly polarized light by receiving and transmitting light from said light source, and that said polarizer comprises a medium I which has birefringence so as to be able to generate tow or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indexes of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of said polarizer such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components polarized light is transmitted through said medium II.

Claim 2

Independent Claim 208 words

An apparatus for display comprising: a polarized light source, a liquid crystalline display device, and a means for focusing an image, which is formed by the liquid crystalline display device, on a screen, characterized in that said polarized light source comprises a light source generating unpolarized light or weakly polarized light, and a polarizer for providing highly polarized light by receiving and transmitting light from said light source, and that said polarizer comprises a medium I which has birefringence so as to be able to generate tow or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indexes of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of said polarizer such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components polarized light is transmitted through said medium II.

Claim 3

Independent Claim 195 words

An apparatus for liquid crystal display comprising: a conductive film, a pair of substrates, at least one of which is transparent, a liquid crystal panel which is composed of liquid crystal layer that is inserted between said pair of substrates, a means for operating the liquid crystal layer by adding electric charge to the conductive film, and a polarizer which comprises: a medium I having birefringence so as to be able to generate two or three polarized modes of different refractive indices and a medium II having the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II while another component or components of polarized light is transmitted through said medium II.

Claim 4

Independent Claim 195 words

An apparatus for liquid crystal display comprising: a conductive film, a pair of substrates, at least one of which is transparent, a liquid crystal panel which is composed of liquid crystal layer that is inserted between said pair of substrates, a means for operating the liquid crystal layer by adding electric charge to the conductive film, and a polarizer which comprises: a medium I having birefringence so as to be able to generate two or three polarized modes of different refractive indices and a medium II having the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II while another component or components of polarized light is transmitted through said medium II.

Claim 5

Dependent Claim 26 words

The apparatus for liquid crystal display as claimed in claim 2, wherein said polarizer and an optical reflector are arranged with the liquid crystal panel therebetween.

Claim 6

Dependent Claim 37 words

The apparatus for liquid crystal display as claimed in claim 2, wherein a dichromatic polarizing plate is laminated to said polarizer, and said polarizer is so arranged with the dichromatic polarizing plate adjacent the liquid crystal panel.

Claim 7

Dependent Claim 36 words

The apparatus for liquid crystal display as claimed in claim 2, wherein a dichromatic polarizing plate is laminated to said polarizer, and said polarizer and an optical reflector are arranged with the liquid crystal panel therebetween.

Claim 8

Dependent Claim 141 words

An unabsorbing type polarizer comprising: a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflect at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.

Claim 9

Dependent Claim 141 words

An unabsorbing type polarizer comprising: a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of polarized light transmitted through said medium I is reflect at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.

Claim 10

Dependent Claim 93 words

The unabsorbing type polarizer as claimed in claim 6, wherein an angle of inclination φ between a direction of the transmitting light through said medium I and a line normal to the boundaries between said laminated layers satisfies the relation expressed by the following equation (1): sin.sup.-1 (n.sub.II /n.sub.I1)<φ<sin.sup.-1 (n.sub.II /n.sub.I2)(1) wherein, n I1 and n I2 are the maximum and the minimum refractive index respectively of said medium I, and n I1 >n I2 , n II is the refractive index of said medium II near the boundaries between said laminated layers.

Claim 11

Dependent Claim 51 words

The unabsorbing type polarizer as claimed in any one of claims 6 and 7, wherein said medium II is composed of a layer which has a predetermined refractive index and the property of rotating polarized light passing through it, and an adhesive layer which has a predetermined refractive index and adhesiveness.

Claim 12

Dependent Claim 26 words

The unabsorbing type polarizer as claimed in claim 6, wherein the layer of said medium I is formed thicker than the layer of said medium II.

Claim 13

Dependent Claim 28 words

The unabsorbing type polarizer as claimed in claim 6 wherein said medium I and/or said medium II are organic high polymers which are oriented in a predetermined direction.

Claim 14

Dependent Claim 19 words

The unabsorbing type polarizer as claimed in claim 6 wherein said medium I is liquid crystalline high polymer film.

Claim 15

Dependent Claim 47 words

The unabsorbing type polarizer as claimed in claim 6 wherein said polarizer further comprises a dichromatic polarizing plate, and an optical transmitting axis of said dichromatic polarizing plate is so arranged as to be almost parallel to a plane of polarization of light emitted from said polarizer.

Claim 16

Dependent Claim 35 words

The unabsorbing type polarizer as claimed in claim 6, wherein a film thickness of the medium I is so selected as to allow said reflecting light a plurality of reflections before emitting from said polarizer.

Claim 17

Dependent Claim 173 words

A polarized light source comprising: a light source generating unpolarized light or weakly polarized light, and a polarizer for providing highly polarized light by receiving and transmitting light from said light source, characterized in that said polarizer comprises: a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indexes of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.

Claim 18

Dependent Claim 173 words

A polarized light source comprising: a light source generating unpolarized light or weakly polarized light, and a polarizer for providing highly polarized light by receiving and transmitting light from said light source, characterized in that said polarizer comprises: a medium I which has birefringence so as to be able to generate two or three polarized modes having different refractive indices, and a medium II which has the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indexes of said medium I, wherein said medium I and said medium II are laminated alternately to form a plurality of layers, and boundaries between said laminated layers are arranged at an angle with respect to a surface of the polarizer such that one component of light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II.

Claim 19

Independent Claim 171 words

A method for manufacturing a polarizer comprising the steps of: forming a laminated body by laminating alternately and adhering a medium I having birefringence so as to be able to generate two or three polarized modes of different refractive indices and a medium II of a predetermined thickness having the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, slicing said laminated body at a predetermined angle and to a predetermined thickness so that boundaries between said laminated layers are arranged at an angle with respect to a sliced surface such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II, and making a film on which said medium I and said medium II are arranged in a striped pattern.

Claim 20

Independent Claim 171 words

A method for manufacturing a polarizer comprising the steps of: forming a laminated body by laminating alternately and adhering a medium I having birefringence so as to be able to generate two or three polarized modes of different refractive indices and a medium II of a predetermined thickness having the property of rotating polarized light passing through it and a surface having a refractive index smaller than the largest refractive index among the two or three refractive indices of said medium I, slicing said laminated body at a predetermined angle and to a predetermined thickness so that boundaries between said laminated layers are arranged at an angle with respect to a sliced surface such that one component of polarized light transmitted through said medium I is reflected at the boundary between said medium I and said medium II, while another component or components of polarized light is transmitted through said medium II, and making a film on which said medium I and said medium II are arranged in a striped pattern.

Claim 21

Dependent Claim 43 words

A method of manufacturing of polarizer as claimed in claim 15, wherein said medium I and said medium II are composed of organic high polymers oriented in a predetermined direction, and both of said medium I and said medium II are joined together.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-10-20	1996-04-20	1996-10-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-10-20	2000-04-20	2000-10-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-10-20	2004-04-20	2004-10-20	$7700.00	Window Closed / Lapsed

Unabsorbing type polarizer, method for manufacturing the same, polarized light source using the same, and apparatus for liquid crystal display using the same

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