US5767924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display unit which is immersed in a coolant
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 1996-06-07
•
Granted: 1998-06-16
•
Expires: 2016-06-07
Abstract
Abstract A display unit includes an optical modulation element for subjecting an incident light beam to optical modulation, and a coolant disposed in contact with an output side of the optical modulation element, wherein a focal distance of an output light beam of the optical modulation element is set to a predetermined distance in accordance with a length of the output light beam of the optical modulation element, which passes through the coolant.
Inventors
- 👤 Masaaki Hiroki
- 👤 Jun Koyama
- 👤 Toshimitsu Konuma
- 👤 Shunpei Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:00
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; H04N9/3141; H04N9/317; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133382; G02F1/133385; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; H04N2005/745
Claims Analysis
Total Claims: 79
Claim 1
Independent Claim
48 words
A display unit comprising: a plurality of liquid crystal panels for modulating incident light beams; a projection lens for projecting the light beams; and means for adjusting focal distances of the beams related to said projection lens; wherein said panels are integrated together with a pair of substrates.
Claim 2
Dependent Claim
48 words
A display unit comprising: a plurality of liquid crystal panels for modulating incident light beams; a projection lens for projecting the light beams; and means for adjusting focal distances of the beams related to said projection lens; wherein said panels are integrated together with a pair of substrates.
Claim 3
Dependent Claim
29 words
The display unit of claim 1 wherein said adjusting means comprises a material for shortening the focal distance in accordance with a distance at which the beam passes therein.
Claim 4
Dependent Claim
29 words
The display unit of claim 1 wherein said adjusting means comprises a material for prolonging the focal distance in accordance with a distance at which the beam passes therein.
Claim 5
Dependent Claim
19 words
The display unit of claim 1 wherein said adjusting means comprises a correction lens for correcting the focal distance.
Claim 6
Dependent Claim
107 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams into modulated color light beams, respectively; a projection lens for projecting the modulated color light beams, distances at which the modulated color light beams reach to said projection lens being different in accordance with paths through said liquid crystal panels; and a material for shortening focus distances of the beams related to said projection lens, wherein distances the modulated beams travel from their respective panels are different; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 7
Dependent Claim
107 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams into modulated color light beams, respectively; a projection lens for projecting the modulated color light beams, distances at which the modulated color light beams reach to said projection lens being different in accordance with paths through said liquid crystal panels; and a material for shortening focus distances of the beams related to said projection lens, wherein distances the modulated beams travel from their respective panels are different; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 8
Dependent Claim
13 words
The display unit of claim 5 wherein said panel comprises a color filter.
Claim 9
Dependent Claim
122 words
A display unit comprising: means for generating a plurality of color light beams; a plurality of liquid crystal panels for modulating the color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach said projection lens being different; a cooling material for cooling at least said panels, said panel being immersed in said cooling liquid; and a hollow portion formed at output sides of said panels inside said cooling material, said hollow portion prolonging focal distances of the beams related to said projection lens and distances at which the beams pass being different; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 10
Dependent Claim
122 words
A display unit comprising: means for generating a plurality of color light beams; a plurality of liquid crystal panels for modulating the color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach said projection lens being different; a cooling material for cooling at least said panels, said panel being immersed in said cooling liquid; and a hollow portion formed at output sides of said panels inside said cooling material, said hollow portion prolonging focal distances of the beams related to said projection lens and distances at which the beams pass being different; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 11
Dependent Claim
16 words
The display of claim 7 wherein said hollow porion is filled with air or inactive gas.
Claim 12
Dependent Claim
23 words
The display unit of claim 7 wherein a refractive index of inside said hollow portion is lower than that of said cooling material.
Claim 13
Dependent Claim
16 words
The display unit of claim 7 wherein said generating means is immersed in said cooling material.
Claim 14
Dependent Claim
132 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams and changing the beams into color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach said projection lens being different in accordance with said panels; a cooling material for cooling at least said panels, said panel being immersed therein; and a hollow portion formed at output sides of said panels inside said cooling material, said hollow portion prolonging focal distances of the beams related to said projection lens and distances at which the beams therein are being different in accordance with said panels; wherein focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 15
Dependent Claim
132 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams and changing the beams into color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach said projection lens being different in accordance with said panels; a cooling material for cooling at least said panels, said panel being immersed therein; and a hollow portion formed at output sides of said panels inside said cooling material, said hollow portion prolonging focal distances of the beams related to said projection lens and distances at which the beams therein are being different in accordance with said panels; wherein focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 16
Dependent Claim
13 words
The display unit of claim 11 wherein said panel comprises a color filter.
Claim 17
Dependent Claim
16 words
The display of claim 11 wherein said hollow porion is filled with air or inactive gas.
Claim 18
Dependent Claim
23 words
The display unit of claim 11 wherein a refractive index of inside said hollow portion is lower than that of said cooling material.
Claim 19
Dependent Claim
114 words
A display unit comprising: means for generating a plurality of color light beams; a plurality of liquid crystal panels for modulating the color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach to said projection lens are different in accordance with said panels; and a correction lens provided at an output side of at least one of said panels, said correction lens correcting focal distance of the beam related to said projection lens; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other; and a cooling material immersing said panels and cooling said panels.
Claim 20
Dependent Claim
114 words
A display unit comprising: means for generating a plurality of color light beams; a plurality of liquid crystal panels for modulating the color light beams, respectively; a projection lens for projecting the modulated light beams, distances at which the modulated beams reach to said projection lens are different in accordance with said panels; and a correction lens provided at an output side of at least one of said panels, said correction lens correcting focal distance of the beam related to said projection lens; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other; and a cooling material immersing said panels and cooling said panels.
Claim 21
Dependent Claim
12 words
The display unit of claim 15 wherein said cooling material is translucent.
Claim 22
Dependent Claim
107 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams into modulated color light beams, respectively; a projection lens for projecting the modulated color light beams; wherein distances at which the modulated color light beams travel from their respective panels to said projection lens are different; and a correction lens provided at an output side of at least one of said panels, said correction lens changing a focal distance of the beam related to said projection lens; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 23
Dependent Claim
107 words
A display unit comprising: means for generating white light beams; a plurality of liquid crystal panels for modulating the beams into modulated color light beams, respectively; a projection lens for projecting the modulated color light beams; wherein distances at which the modulated color light beams travel from their respective panels to said projection lens are different; and a correction lens provided at an output side of at least one of said panels, said correction lens changing a focal distance of the beam related to said projection lens; wherein said focal positions of the respective beams which pass through said projection lens are substantially identical to each other.
Claim 24
Dependent Claim
13 words
The display unit of claim 17 wherein said panel comprises a color filter.
Claim 25
Dependent Claim
18 words
The display unit of claim 17 wherein said panels are immersed in a cooling material for cooling thereof.
Claim 26
Dependent Claim
12 words
The display unit of claim 19 wherein said cooling material is translucent.
Claim 27
Dependent Claim
77 words
A projection type display unit which displays on a screen comprising: means for generating light; a plurality of dichroic mirrors for splitting said light into color light; a plurality of liquid crystal panels for modulating said color light; a plurality of reflection mirrors; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing said liquid crystal panels, for preventing temperature of said liquid crystal panels from increasing beyond a specified point.
Claim 28
Dependent Claim
77 words
A projection type display unit which displays on a screen comprising: means for generating light; a plurality of dichroic mirrors for splitting said light into color light; a plurality of liquid crystal panels for modulating said color light; a plurality of reflection mirrors; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing said liquid crystal panels, for preventing temperature of said liquid crystal panels from increasing beyond a specified point.
Claim 29
Dependent Claim
22 words
The display unit of claim 21 wherein said cooling liquid comprising a fluorine inactive liquid which is able to transmit said light.
Claim 30
Dependent Claim
21 words
The display unit of claim 21 wherein said cooling liquid comprises a cedar oil which is able to transmit said light.
Claim 31
Dependent Claim
19 words
The display unit of claim 21 further comprising peripheral circuits of said liquid crystal panels comprising thin film transistors.
Claim 32
Dependent Claim
27 words
The display unit of claim 21 wherein said display unit is a front projection type, wherein the screen is separated from other parts of said display unit.
Claim 33
Dependent Claim
31 words
The display unit of claim 21 wherein said display unit is a rear projection type, wherein the screen is physically in a same cabinet with other parts of said display unit.
Claim 34
Dependent Claim
91 words
A projection type display unit having a screen on which light is projected comprising: means for generating light; a plurality of dichroic mirrors for splitting said light into color light; a plurality of liquid crystal panels for modulating said color light; a plurality of reflection mirrors; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing at least said dichroic mirrors, said liquid crystal panels and said reflection mirrors, for preventing temperature of a whole of said display unit from increasing beyond a certain point.
Claim 35
Dependent Claim
91 words
A projection type display unit having a screen on which light is projected comprising: means for generating light; a plurality of dichroic mirrors for splitting said light into color light; a plurality of liquid crystal panels for modulating said color light; a plurality of reflection mirrors; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing at least said dichroic mirrors, said liquid crystal panels and said reflection mirrors, for preventing temperature of a whole of said display unit from increasing beyond a certain point.
Claim 36
Dependent Claim
22 words
The display unit of claim 27 wherein said cooling liquid comprises a fluorine inactive liquid which is able to transmit said light.
Claim 37
Dependent Claim
21 words
The display unit of claim 27 wherein said cooling liquid comprises a cedar oil which is able to transmit said light.
Claim 38
Dependent Claim
19 words
The display unit of claim 27 further comprising peripheral circuits of said liquid crystal panels comprises thin film transistors.
Claim 39
Dependent Claim
27 words
The display unit of claim 27 wherein said display is a front projection type, wherein the screen is separated from the other parts of said display unit.
Claim 40
Dependent Claim
31 words
The display unit of claim 27 wherein said display is a rear projection type, wherein the screen is put into a same cabinet with the other parts of said display unit.
Claim 41
Dependent Claim
59 words
The display unit of claim 27, further comprising: a hollow portion formed at output sides of said liquid crystal panels inside said cooling liquid, said hollow portion located to change a focal distance of light; wherein a length at which said modulated light pass into said hollow portion being different in accordance with paths to said liquid crystal panels.
Claim 42
Dependent Claim
71 words
A projection type display unit projecting information on a screen comprising: means for generating a plurality of colored light parts; a plurality of liquid crystal panels for modulating said colored light parts; a plurality of reflection mirrors; and a projection lens for projecting said modulated light on a screen; a cooling liquid, immersing said liquid crystal panels, and preventing temperature of said liquid crystal panels from increasing beyond a certain point.
Claim 43
Dependent Claim
71 words
A projection type display unit projecting information on a screen comprising: means for generating a plurality of colored light parts; a plurality of liquid crystal panels for modulating said colored light parts; a plurality of reflection mirrors; and a projection lens for projecting said modulated light on a screen; a cooling liquid, immersing said liquid crystal panels, and preventing temperature of said liquid crystal panels from increasing beyond a certain point.
Claim 44
Dependent Claim
22 words
The display unit of claim 34 wherein said cooling liquid comprises a fluorine inactive liquid which is able to transmit said light.
Claim 45
Dependent Claim
21 words
The display unit of claim 34 wherein said cooling liquid comprises a cedar oil which is able to transmit said light.
Claim 46
Dependent Claim
19 words
The display unit of claim 34 further comprising peripheral circuits of said liquid crystal panels comprises thin film transistors.
Claim 47
Dependent Claim
27 words
The display unit of claim 34 wherein said display is a front projection type, wherein the screen is separated from the other parts of said display unit.
Claim 48
Dependent Claim
31 words
The display unit of claim 34 wherein said display is a rear projection type, wherein the screen is put into a same cabinet with the other parts of said display unit.
Claim 49
Dependent Claim
77 words
A projection type display unit projecting information on a screen comprising: means for generating a plurality of colored light parts; a plurality of liquid crystal panels modulating said colored light parts; a plurality of reflection mirrors; a projection lens for projecting said modulated light on a screen; and a cooling liquid, immersing at least said liquid crystal panels and said reflection mirrors for preventing temperature of whole of said display unit from increasing beyond a certain point.
Claim 50
Dependent Claim
77 words
A projection type display unit projecting information on a screen comprising: means for generating a plurality of colored light parts; a plurality of liquid crystal panels modulating said colored light parts; a plurality of reflection mirrors; a projection lens for projecting said modulated light on a screen; and a cooling liquid, immersing at least said liquid crystal panels and said reflection mirrors for preventing temperature of whole of said display unit from increasing beyond a certain point.
Claim 51
Dependent Claim
22 words
The display unit of claim 40 wherein said cooling liquid comprises a fluorine inactive liquid which is able to transmit said light.
Claim 52
Dependent Claim
21 words
The display unit of claim 40 wherein said cooling liquid comprises a cedar oil which is able to transmit said light.
Claim 53
Dependent Claim
19 words
The display unit of claim 40 further comprising peripheral circuits of said liquid crystal panels comprises thin film transistors.
Claim 54
Dependent Claim
27 words
The display unit of claim 40 wherein said display is a front projection type, wherein the screen is separated from the other parts of said display unit.
Claim 55
Dependent Claim
32 words
The display unit of claim 40 wherein said display unit is a rear projection type, wherein the screen is put into a same cabinet with the other parts of said display unit.
Claim 56
Dependent Claim
54 words
The display unit of claim 40, further comprising: a hollow potion formed at output sides of said liquid crystal panels inside said cooling liquid, said hollow portion located to change focal distances of light; wherein a length at which said modulated light pass into said hollow portion being different in accordance with said panels.
Claim 57
Dependent Claim
70 words
A projection type display unit displaying on a screen comprising: means for generating light; a plurality of liquid crystal panels for modulating said light into modulated color light, respectively; a plurality of reflection mirrors, reflecting said modulated color light; a projection lens for projecting said modulated light on the light screen; and a cooling liquid for preventing a temperature of said liquid crystal panels from increasing beyond a certain point.
Claim 58
Dependent Claim
70 words
A projection type display unit displaying on a screen comprising: means for generating light; a plurality of liquid crystal panels for modulating said light into modulated color light, respectively; a plurality of reflection mirrors, reflecting said modulated color light; a projection lens for projecting said modulated light on the light screen; and a cooling liquid for preventing a temperature of said liquid crystal panels from increasing beyond a certain point.
Claim 59
Dependent Claim
22 words
The display unit of claim 47 wherein said cooling liquid comprises a fluorine inactive liquid which is able to transmit said light.
Claim 60
Dependent Claim
21 words
The display unit of claim 47 wherein said cooling liquid comprises a cedar oil which is able to transmit said light.
Claim 61
Dependent Claim
19 words
The display unit of claim 47 wherein said liquid crystal panels are integrated together with a pair of substrates.
Claim 62
Dependent Claim
19 words
The display unit of claim 47 further comprising peripheral circuits of said liquid crystal panels comprising thin film transistors.
Claim 63
Dependent Claim
27 words
The display unit of claim 47 wherein said display is a front projection type, wherein the screen is separated from the other parts of said display unit.
Claim 64
Dependent Claim
31 words
The display unit of claim 47 wherein said display is a rear projection type, wherein the screen is put into a same cabinet with the other parts of said display unit.
Claim 65
Dependent Claim
77 words
A projection type display unit display comprising: means for generating light; a plurality of liquid crystal panels for modulating said light into modulated color light, respectively; a plurality of reflection mirrors, reflecting said modulated color light; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing at least said liquid crystal panels and reflection mirrors for preventing temperature of a whole of said display unit from increasing beyond a certain point.
Claim 66
Dependent Claim
77 words
A projection type display unit display comprising: means for generating light; a plurality of liquid crystal panels for modulating said light into modulated color light, respectively; a plurality of reflection mirrors, reflecting said modulated color light; a projection lens for projecting said modulated light on the screen; and a cooling liquid, immersing at least said liquid crystal panels and reflection mirrors for preventing temperature of a whole of said display unit from increasing beyond a certain point.
Claim 67
Dependent Claim
22 words
The display unit of claim 54 wherein said cooling liquid comprises a fluorine inactive liquid and is able to transmit said light.
Claim 68
Dependent Claim
21 words
The display unit of claim 54 wherein said cooling liquid comprises a cedar oil and is able to transmit said light.
Claim 69
Dependent Claim
20 words
The display unit of claim 54 further comprising peripheral circuits of said liquid crystal panels which comprises thin film transistors.
Claim 70
Dependent Claim
27 words
The display unit of claim 54 wherein said unit is a front projection type, wherein the screen is separated from the other parts of said display unit.
Claim 71
Dependent Claim
31 words
The display unit of claim 54 wherein said unit is a rear projection type, wherein the screen is put into a same cabinet with the other parts of said display unit.
Claim 72
Dependent Claim
49 words
The display unit of claim 54, further comprising: a hollow portion formed at output sides of said liquid crystal panels inside said cooling liquid, said hollow portion changes focal distances; wherein length at which said modulated light pass into said hollow portion being different in accordance with said panels.
Claim 73
Dependent Claim
71 words
A projector comprising: a light source; a liquid crystal device for modulating light from said light source; a first optical system directing the light from said light toward said liquid crystal device; a second optical system directing the light modulated by the liquid crystal toward a screen; and a cooling liquid medium cooling at least said liquid crystal device, wherein said cooling medium covers an entirety of said liquid crystal device.
Claim 74
Dependent Claim
71 words
A projector comprising: a light source; a liquid crystal device for modulating light from said light source; a first optical system directing the light from said light toward said liquid crystal device; a second optical system directing the light modulated by the liquid crystal toward a screen; and a cooling liquid medium cooling at least said liquid crystal device, wherein said cooling medium covers an entirety of said liquid crystal device.
Claim 75
Dependent Claim
17 words
A projector according to claim 61, wherein said cooling liquid medium also covers said first optical system.
Claim 76
Dependent Claim
77 words
A projection type display unit, comprising: a light generator; a plurality of liquid crystal panels, operating to modulate light from said light generator into color light, each said liquid crystal panels modulating a different spectral portion of said light; a projection lens, receiving said light from said liquid crystal panels and projecting said light on a screen; and a cooling liquid, immersing at least one part of said display unit, and cooling said at least one part.
Claim 77
Dependent Claim
77 words
A projection type display unit, comprising: a light generator; a plurality of liquid crystal panels, operating to modulate light from said light generator into color light, each said liquid crystal panels modulating a different spectral portion of said light; a projection lens, receiving said light from said liquid crystal panels and projecting said light on a screen; and a cooling liquid, immersing at least one part of said display unit, and cooling said at least one part.
Claim 78
Dependent Claim
20 words
A unit as in claim 63 wherein said cooling liquid also adjusts a focal distance of the light passing therethrough.
Claim 79
Dependent Claim
62 words
A unit as in claim 63 wherein said liquid crystal units are disposed at different locations so that light passing therethrough travels over different paths, and wherein paths of said light through said cooling material is different in order to adjust said focal distances of the beams so that all focal distances of beams arriving at said lens are substantially the same.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-15 | 2001-12-15 | 2002-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-15 | 2005-12-15 | 2006-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-15 | 2009-12-15 | 2010-06-16 | $7700.00 | Window Closed / Lapsed |