EP0239024A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Projection display apparatus
Assignee: Casio Computer Co Ltd
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Filing: 1987-03-20
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Granted: —
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Expires: 2007-03-20
Abstract
Abstract A projection display apparatus includes a light source unit (50) for generating light for image formation, an electro-optical display device (43) for displaying an optical image by utilizing the light emitted from the light source unit (50), and an enlarging/projection lens (20). The light source unit (50), the display device (43), and the projection lens (20) are accommodated in a housing with vent openings. The housing also includes a fan (73) for cooling the interior of the housing with cool air and a cooler (3l) for maintaining a display panel (40) within a predetermined temperature range. The light source unit (50) includes a lamp (52) and a reflector (53) and is designed not to cause image deformation and formation of a shadow of a discharge portion. In order to display a television image on the display device (43), all television image display circuit units excluding an antenna are accommodated in the housing. The enlarging/projection lens (20) can control a magnification and a focal point of the image projected on the screen.
Inventors
- 👤 Masahiro Patent Department Development Div. Ogawa
- 👤 Tatsuo Patent Dept.Development Div. Shimazaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:13
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; G; G03; G03B; G03B21/00; G03B21/005; G03B21/006; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133382; G02F1/133385; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
195 words
A projection display apparatus characterized by comprising: light source means (50) having a lamp with a light-emitting portion and a reflector for reflecting light emitted from said lamp; a display device (43) for partially shielding the light from said light source means upon an application of electrical energy; a projection lens (20) for enlarging an optical image incident from said display device and projecting an enlarged image on a screen; a cooler (3l) arranged in contact with an outer surface of said display device, having a transparent portion opposing at least an image formation area of said display device, and having a heat radiator for radiating thermal energy internally stored upon reception of the light from said light source means; a cooling fan (73) arranged between said light source means and said display device in a position deviated from an optical path; and a housing (l0) for cooling the thermal energy dissipated from said light source means and said cooler by external cooling air, said housing being provided with an exhaust port for exhausting hot air outside said apparatus by said cooling fan and with an intake port for receiving external air into said apparatus.
Claim 2
Dependent Claim
195 words
A projection display apparatus characterized by comprising: light source means (50) having a lamp with a light-emitting portion and a reflector for reflecting light emitted from said lamp; a display device (43) for partially shielding the light from said light source means upon an application of electrical energy; a projection lens (20) for enlarging an optical image incident from said display device and projecting an enlarged image on a screen; a cooler (3l) arranged in contact with an outer surface of said display device, having a transparent portion opposing at least an image formation area of said display device, and having a heat radiator for radiating thermal energy internally stored upon reception of the light from said light source means; a cooling fan (73) arranged between said light source means and said display device in a position deviated from an optical path; and a housing (l0) for cooling the thermal energy dissipated from said light source means and said cooler by external cooling air, said housing being provided with an exhaust port for exhausting hot air outside said apparatus by said cooling fan and with an intake port for receiving external air into said apparatus.
Claim 3
Independent Claim
51 words
An apparatus according to claim l, characterized in that said reflector has a parabolic surface, said lamp is located such that said light-emitting portion is aligned with a focal point of said parabolic surface, and the collimated light reflected by said reflector is emitted onto said optical display panel without refractions.
Claim 4
Dependent Claim
33 words
An apparatus according to claim 2, characterized by further comprising a light-absorbing transparent plate arranged between said light source means and said display device to absorb the light from said light source means.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 3, characterized in that said transparent plate is supported by a heat-insulating member.
Claim 6
Dependent Claim
28 words
An apparatus according to claim 4, characterized in that said cooling fan is arranged to ventilate an interior of said apparatus at side spaces of said heat-insulating member.
Claim 7
Dependent Claim
65 words
An apparatus according to claim 2, characterized by further comprising: a focusing Fresnel lens, arranged between said light source means and said display device, for focusing the collimated light reflected by said reflector; a heat-absorbing transparent plate having an area corresponding to at least a cross section of the light focused by said focusing Fresnel lens; and a heat-insulating member for supporting said transparent plate.
Claim 8
Dependent Claim
136 words
A projection display apparatus comprising: a housing partitioned by a partitioning member with a light-transmitting window into a light source compartment and a display compartment, said light source and display compartments being provided with vent openings, respectively; a light-transmitting plate mounted on said partitioning member so as to cover said light-transmitting window; a light source case disposed in said light source compartment and having a lamp and a reflector; a display device driven by electrical energy and a cooler arranged in contact with said display device, said display device and said cooler being located in said display compartment; a projection lens for enlarging and projecting an image displayed on said display device on a screen; and one fan for ventilating said light source and display compartments with respect to said partitioning member as a boundary surface.
Claim 9
Dependent Claim
136 words
A projection display apparatus comprising: a housing partitioned by a partitioning member with a light-transmitting window into a light source compartment and a display compartment, said light source and display compartments being provided with vent openings, respectively; a light-transmitting plate mounted on said partitioning member so as to cover said light-transmitting window; a light source case disposed in said light source compartment and having a lamp and a reflector; a display device driven by electrical energy and a cooler arranged in contact with said display device, said display device and said cooler being located in said display compartment; a projection lens for enlarging and projecting an image displayed on said display device on a screen; and one fan for ventilating said light source and display compartments with respect to said partitioning member as a boundary surface.
Claim 10
Dependent Claim
61 words
An apparatus according to claim 7, characterized in that said cooler comprises heat conductive pipes at both sides thereof and a pair of heat radiation members which are connected to said heat conductive pipes and each of which comprises a plurality of fins, said pair of heat radiation members being symmetrical so as to circulate an airflow in said display compartment.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 8, characterized in that said plurality of fins connected to each of said heat conductive pipes are parallel to each other.
Claim 12
Dependent Claim
34 words
l0. An apparatus according to claim 8, characterized in that said fins are inclined in said display compartment such that fin surfaces opposite to said fan are directed toward a center of said fan.
Claim 13
Dependent Claim
146 words
A projection display apparatus comprising: a light source unit comprising a parabolic reflector, a lamp, and a metal plate, said lamp being provided with a light-emitting portion, an anode, and a cathode, said anode and said cathode being located to interpose said light-emitting portion, said light-emitting portion being located at a focal point of said reflector, and said anode and said cathode being present on an axis of said reflector, and said metal plate being adapted to entirely cover at least sides of said reflector; a display unit having a display device and a cooler coupled to said display device; an optical unit having at least one lens to enlarge an image displayed on said display device; cooling means for cooling at least said light source unit; and a housing for accommodating said light source unit, said display unit, said optical unit, and said cooling means.
Claim 14
Dependent Claim
146 words
A projection display apparatus comprising: a light source unit comprising a parabolic reflector, a lamp, and a metal plate, said lamp being provided with a light-emitting portion, an anode, and a cathode, said anode and said cathode being located to interpose said light-emitting portion, said light-emitting portion being located at a focal point of said reflector, and said anode and said cathode being present on an axis of said reflector, and said metal plate being adapted to entirely cover at least sides of said reflector; a display unit having a display device and a cooler coupled to said display device; an optical unit having at least one lens to enlarge an image displayed on said display device; cooling means for cooling at least said light source unit; and a housing for accommodating said light source unit, said display unit, said optical unit, and said cooling means.
Claim 15
Independent Claim
50 words
An apparatus according to claim ll, characterized by further comprising a light-transmitting plate for passing the light emitted from said light source unit and a partition wall for supporting said light-transmitting plate, said light-transmitting plate and said partition wall being arranged between said light source unit and said display unit.
Claim 16
Independent Claim
22 words
An apparatus according to claim l2, characterized in that said display device is directly irradiated with collimated light reflected by said reflector.
Claim 17
Independent Claim
35 words
An apparatus according to claim ll, characterized in that one of said anode and said cathode is connected to a thin plate-like connecting terminal parallel to an axis of a focal point of said reflector.
Claim 18
Independent Claim
38 words
An apparatus according to claim l4, characterized in that said connecting terminal is made of a metal film and is connected to a connecting lead, a surface of which is parallel to the light reflected by said reflector.
Claim 19
Independent Claim
28 words
An apparatus according to claim l5, characterized in that said metal plate comprises a protective member for receiving broken pieces of said lamp when said lamp is exploded.
Claim 20
Independent Claim
41 words
An apparatus according to claim ll, characterized by further comprising a honeycomb core located between said light source unit and said display unit, and made of a metal film having a surface directed parallel to the light reflected by said reflector.
Claim 21
Independent Claim
23 words
An apparatus according to claim l7, characterized in that said honeycomb core is mounted on said metal plate of said light source unit.
Claim 22
Independent Claim
20 words
An apparatus according to claim l8, characterized in that one end of said lamp is supported by said honeycomb core.
Claim 23
Independent Claim
43 words
An apparatus according to claim ll, characterized in that said lamp is fixed to said reflector such that the other end of said lamp is inserted in a neck formed in said reflector and is fixed by an adhesive filled in said neck.
Claim 24
Dependent Claim
38 words
2l. An apparatus according to claim 20, characterized in that said light source unit comprises a support plate fixed by an adhesive filled in said neck of said reflector and a permanent magnet mounted on said support plate.
Claim 25
Dependent Claim
103 words
A projection television receiver apparatus comprising: light source means; display means; a circuit unit including a linear circuit for processing a television wave to generate an image signal and sync signals, and a display driver for driving said display means; a projection lens for enlarging and projecting an image displayed on said display means onto a screen; first cooling means for cooling an interior of said apparatus; second cooling means for cooling said display means; and a housing member for accommodating said light source means, said display means, said circuit unit, said projection lens, said first cooling means, and said second cooling means.
Claim 26
Dependent Claim
103 words
A projection television receiver apparatus comprising: light source means; display means; a circuit unit including a linear circuit for processing a television wave to generate an image signal and sync signals, and a display driver for driving said display means; a projection lens for enlarging and projecting an image displayed on said display means onto a screen; first cooling means for cooling an interior of said apparatus; second cooling means for cooling said display means; and a housing member for accommodating said light source means, said display means, said circuit unit, said projection lens, said first cooling means, and said second cooling means.
Claim 27
Dependent Claim
19 words
An apparatus according to claim 22, characterized in that said display means comprises a dot-matrix display liquid crystal panel.
Claim 28
Dependent Claim
21 words
An apparatus according to claim 23, characterized in that said liquid crystal display panel comprises an active drive color display panel.
Claim 29
Dependent Claim
35 words
An apparatus according to claim 20, characterized by further comprising a partitioning member arranged between said light source means and said display means to cause the light from said light source means to transmit therethrough.
Claim 30
Dependent Claim
55 words
An apparatus according to claim 20, characterized in that said light source means comprises a parabolic reflector and a light source lamp having a light-emitting portion located at a focal point of said reflector, and the light reflected by said reflector is directly incident on said display means without being refracted by an optical system.
Claim 31
Dependent Claim
139 words
A projection television receiver apparatus comprising: light source means; display means; cooling means for cooling said light source means and said display means; a circuit unit having a linear circuit for processing a television wave and generating an image signal and sync signals, and a display driver for driving said display means; projection optical means for enlarging an image displayed on said display means and projecting an enlarged image on a screen, said projection optical means being adapted to change a focal point; a housing member for accommodating said light source means, said optical display means, said cooling means, said circuit unit, and said light source means; and a lift mechanism, mounted in said housing member on the side of said projection optical means, for vertically moving a housing member portion on the side of said projection optical means.
Claim 32
Dependent Claim
139 words
A projection television receiver apparatus comprising: light source means; display means; cooling means for cooling said light source means and said display means; a circuit unit having a linear circuit for processing a television wave and generating an image signal and sync signals, and a display driver for driving said display means; projection optical means for enlarging an image displayed on said display means and projecting an enlarged image on a screen, said projection optical means being adapted to change a focal point; a housing member for accommodating said light source means, said optical display means, said cooling means, said circuit unit, and said light source means; and a lift mechanism, mounted in said housing member on the side of said projection optical means, for vertically moving a housing member portion on the side of said projection optical means.
Claim 33
Dependent Claim
60 words
An apparatus according to claim 27, characterized in that said lift mechanism comprises an operation knob, a screw shaft vertically disposed in said apparatus and adapted to rotate upon rotation of said operation knob, a movable member meshed with said screw shaft and axially moved upon rotation of said screw shaft, and a leg member coupled to said movable member.
Claim 34
Dependent Claim
55 words
An apparatus according to claim 28, characterized in that said lift mechanism is mounted outside the center of gravity along a widthwise direction of said apparatus, and said leg member comprises an extended portion which is bent in a direction perpendicular to a vertical direction and extending over the center of gravity of said apparatus.
Claim 35
Dependent Claim
118 words
A light source housing used for a projection apparatus or the like, comprising: a parabolic reflector; a lamp having an anode and a cathode spaced apart therefrom, and a light-emitting portion formed between said anode and said cathode; a metal housing member for entirely covering sides of said reflector; and a connecting metal film connected to at least one of said anode and said cathode; one of said anode and said cathode being provided with a thin connecting terminal having a surface parallel to light reflected by said reflector, and said connecting metal film being connected to said connecting terminal such that a surface of said connecting metal film is parallel to the light reflected by said reflector.
Claim 36
Dependent Claim
118 words
A light source housing used for a projection apparatus or the like, comprising: a parabolic reflector; a lamp having an anode and a cathode spaced apart therefrom, and a light-emitting portion formed between said anode and said cathode; a metal housing member for entirely covering sides of said reflector; and a connecting metal film connected to at least one of said anode and said cathode; one of said anode and said cathode being provided with a thin connecting terminal having a surface parallel to light reflected by said reflector, and said connecting metal film being connected to said connecting terminal such that a surface of said connecting metal film is parallel to the light reflected by said reflector.
Claim 37
Dependent Claim
96 words
3l. A light source housing used in a projection apparatus or the like, comprising: a parabolic reflector having a neck at a central portion thereof; a lamp having an anode and a cathode spaced apart therefrom, and a light-emitting portion formed between said anode and said cathode; an arc stabilizing magnet located on the rear side of said reflector; a support for supporting said arc stabilizing magnet; and an adhesive for fixing said lamp to said neck such that said anode and said cathode are located on an axis of a focal point of said reflector.
Claim 38
Dependent Claim
96 words
3l. A light source housing used in a projection apparatus or the like, comprising: a parabolic reflector having a neck at a central portion thereof; a lamp having an anode and a cathode spaced apart therefrom, and a light-emitting portion formed between said anode and said cathode; an arc stabilizing magnet located on the rear side of said reflector; a support for supporting said arc stabilizing magnet; and an adhesive for fixing said lamp to said neck such that said anode and said cathode are located on an axis of a focal point of said reflector.
Claim 39
Dependent Claim
16 words
A housing according to claim 3l, characterized in that said support is fixed by said adhesive.
Claim 40
Dependent Claim
15 words
A housing according to claim 32, characterized in that said adhesive is a ceramic adhesive.
Claim 41
Dependent Claim
58 words
A screen apparatus used in a projection apparatus, comprising: two pairs of arcuated frame members constituting a frame; hook members integrally formed with each of said arcuated frame members; and a screen sheet having an edge urged by said hook members against said arcuated frame members, said screen sheet having rigidity to be deformed in a spherical shape.
Claim 42
Dependent Claim
58 words
A screen apparatus used in a projection apparatus, comprising: two pairs of arcuated frame members constituting a frame; hook members integrally formed with each of said arcuated frame members; and a screen sheet having an edge urged by said hook members against said arcuated frame members, said screen sheet having rigidity to be deformed in a spherical shape.
Claim 43
Dependent Claim
18 words
An apparatus according to claim 34, characterized in that said screen sheet is made of a metal film.
Claim 44
Dependent Claim
18 words
An apparatus according to claim 34, characterized by further comprising plastic covers for covering said arcuated frame members.
References Cited (Backward Citations)
No citation records indexed.
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