US20090001858A1 - Adaptive Projection Television Screen Mounting Clamps - Google Patents
Adaptive Projection Television Screen Mounting Clamps Download PDFInfo
- Publication number
- US20090001858A1 US20090001858A1 US12/087,443 US8744306A US2009001858A1 US 20090001858 A1 US20090001858 A1 US 20090001858A1 US 8744306 A US8744306 A US 8744306A US 2009001858 A1 US2009001858 A1 US 2009001858A1
- Authority
- US
- United States
- Prior art keywords
- screen
- bracket
- projection display
- strip
- screen mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
Definitions
- the invention relates generally to a projection display and, in particular, details for mounting a projection display screen.
- Projection display televisions have become widely used.
- the cabinets for these projection display televisions are typically made from plastic.
- a problem that projection display televisions typically have is keeping the top edge of the screen straight and in the proper location.
- Plastic cabinets provide nice aesthetics but have a tendency to bow along the top edge, aggravating the ability to keep the top edge of the screen straight and in location. This is an even more severe problem on projection display televisions that incorporate upangle optics because such televisions require a more accurate screen location with respect to the optics.
- a particular problem is the thickness tolerance of the screen.
- the screen is typically made up of multiple pieces that are laminated and/or taped together.
- Another problem is that the width and height of the screen may vary significantly as a function of temperature and humidity. The screen must be free to expand in width and height or it will bulge out. With the steep upangles involved in recent projection televisions, bulging of the screen can cause significant image distortions.
- these screens are held in a groove in metal wood or plastic. The groove has room for expansion and contraction of the screen and mating parts. The sloppy fit is acceptable for conventional projection television displays and on-axis microdisplay sets since the resulting image geometry is not distorted.
- the steep upangles associated with recent projection display raypaths changes in the location or position of the screen surface results in significant distortions to the image geometry.
- the present invention provides strip mounts to the top and bottom of the screen mounting brackets to hold a projection display screen in place while accommodating screen tolerances.
- the strip mounts have a C-shaped profile that holds the display screen in place.
- the screen mounting brackets are elongate, stiff members.
- FIG. 1A is a prospective front view of a projection display television according to an exemplary embodiment of the present invention
- FIG. 1B is a prospective rear view of the projection display television of FIG. 1A ;
- FIG. 2 is a partial rear perspective view of the projection display television of FIGS. 1A and 1B , showing the top extrusion according to an exemplary embodiment of the present invention
- FIG. 3A is an exploded side-view of the plastic screen frame, extrusions and strip mounts
- FIG. 3B is a sectional view of the plastic screen frame, extrusions and strip mounts of FIG. 3A ;
- FIG. 3C is a sectional view of the extrusion and strip mount of FIG. 2 .
- the present invention shown in FIGS. 1A-3C , provides an extruded metal hinge mechanism that keeps the top of the projection display television screen frame straight and allows the screen assembly to be removed from the front without the use of screws from the rear.
- FIGS. 3A-3C An exemplary projection display television is shown in FIGS. 3A-3C .
- the screen mounting bracket 50 has top and bottom aluminum extrusions, that are a continuous stiffener for the screen frame 12 .
- Aluminum extrusions are inexpensive to fabricate and provide good dimensional stability and stiffness properties.
- Strip mounts 55 A, 55 B attached to the top and bottom screen mounting bracket 50 are used to hold a projection display screen 10 in place.
- the screen mounting bracket 50 A comprises: an anchoring portion 51 that attaches to the screen frame 12 and a “T” shape detail 56 to accept the strip mount 55 .
- the anchoring portion 51 conforms to projections and/or recesses in the screen frame 12 to form a press fit with the screen frame 12 .
- Strip mount 55 A is attached to the “T” shape detail 56 of the screen mounting bracket 50 A, while strip mount 55 B is attached to the “T” details 56 of the screen mounting bracket 50 B.
- the strip mounts 55 A, 55 B have a C-shaped profile and may be made of a flexible plastic extrusion. When mated with the screen frame 12 , there is space between the convex portion of the extrusion and the frame to accommodate the screen thickness.
- the profile of the strip mounts is such that C-shaped cross section allows the profile to flex and maintain a preload against the screen.
- the strip mounts 55 A, 55 B are continuous and evenly press against the screen 10 .
- the top and bottom screen mounting brackets 50 A, 50 B are metal extrusions that have a mating “T” shape detail 56 ( FIG. 3C ) to capture the strip mounts 55 A, 55 B.
- This mating detail 56 is such that the strip mounts 55 A, 55 B squeezes the metal extrusion.
- the C-shape opens up allowing the height of the extrusion to collapse as needed to accommodate the screen thickness variation while maintaining a reasonable force.
- the plastic or elastomeric material used for strip mounts 55 A and 55 B is chosen to be chemically compatible with the screen 10 materials and to have surface hardness characteristics that prevent abrasion to the screen materials during shipping and vibration.
- Linear protrusions 58 incorporated in the strip mounts 55 act as “light strips” to reduce reflections of unwanted light onto the screen 10 .
- a similar result could be obtained by having multiple small striations incorporated into the side wall of the strip mounts rather than the larger linear protrusions.
- the screen mounting bracket 50 A, 50 B and the strip mounts 55 A, 55 B extend essentially the length of the elongate direction (i.e., entire width of the screen frame 12 ), stiffening the entire top edge of the screen frame 12 , holding the top edge of the screen 10 straight and in the proper location.
- the cabinet may be plastic, as is typical for projection display televisions.
- these brackets 50 in the form of extrusions, form a low profile, structural member along the top edge of the cabinet 20 .
- This structural member can be tied into other structural members of the cabinet 20 to help maintain the critical location of the screen frame 12 .
- aluminum extrusions tend to be inherently straight, stiff and stable as compared to other parts such as plastic extrusions, formed sheet metal, wood, or molded plastic.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
Strip mounts on the top and bottom screen mounting brackets for holding a projection display screen in place while accommodating screen tolerances are disclosed. The strip mounts have a C-shaped profile that holds the display screen in place. The screen mounting brackets are elongate, stiff members.
Description
- The invention relates generally to a projection display and, in particular, details for mounting a projection display screen.
- Projection display televisions have become widely used. The cabinets for these projection display televisions are typically made from plastic. A problem that projection display televisions typically have is keeping the top edge of the screen straight and in the proper location. Plastic cabinets provide nice aesthetics but have a tendency to bow along the top edge, aggravating the ability to keep the top edge of the screen straight and in location. This is an even more severe problem on projection display televisions that incorporate upangle optics because such televisions require a more accurate screen location with respect to the optics.
- Many projection televisions have a problem mounting the screen because of large dimensional tolerances and variations. A particular problem is the thickness tolerance of the screen. The screen is typically made up of multiple pieces that are laminated and/or taped together. Another problem is that the width and height of the screen may vary significantly as a function of temperature and humidity. The screen must be free to expand in width and height or it will bulge out. With the steep upangles involved in recent projection televisions, bulging of the screen can cause significant image distortions. Typically, these screens are held in a groove in metal wood or plastic. The groove has room for expansion and contraction of the screen and mating parts. The sloppy fit is acceptable for conventional projection television displays and on-axis microdisplay sets since the resulting image geometry is not distorted. However, with the steep upangles associated with recent projection display raypaths, changes in the location or position of the screen surface results in significant distortions to the image geometry.
- The present invention provides strip mounts to the top and bottom of the screen mounting brackets to hold a projection display screen in place while accommodating screen tolerances. The strip mounts have a C-shaped profile that holds the display screen in place. The screen mounting brackets are elongate, stiff members.
- Exemplary embodiments of the present invention will next be described with reference to the accompanying figures, of which:
-
FIG. 1A is a prospective front view of a projection display television according to an exemplary embodiment of the present invention; -
FIG. 1B is a prospective rear view of the projection display television ofFIG. 1A ; -
FIG. 2 is a partial rear perspective view of the projection display television ofFIGS. 1A and 1B , showing the top extrusion according to an exemplary embodiment of the present invention; -
FIG. 3A is an exploded side-view of the plastic screen frame, extrusions and strip mounts; -
FIG. 3B is a sectional view of the plastic screen frame, extrusions and strip mounts ofFIG. 3A ; and -
FIG. 3C is a sectional view of the extrusion and strip mount ofFIG. 2 . - The present invention, shown in
FIGS. 1A-3C , provides an extruded metal hinge mechanism that keeps the top of the projection display television screen frame straight and allows the screen assembly to be removed from the front without the use of screws from the rear. - An exemplary projection display television is shown in
FIGS. 3A-3C . Thescreen mounting bracket 50 has top and bottom aluminum extrusions, that are a continuous stiffener for thescreen frame 12. Aluminum extrusions are inexpensive to fabricate and provide good dimensional stability and stiffness properties.Strip mounts screen mounting bracket 50 are used to hold aprojection display screen 10 in place. - The
screen mounting bracket 50A comprises: ananchoring portion 51 that attaches to thescreen frame 12 and a “T”shape detail 56 to accept thestrip mount 55. In an exemplary embodiment, theanchoring portion 51 conforms to projections and/or recesses in thescreen frame 12 to form a press fit with thescreen frame 12. -
Strip mount 55A is attached to the “T”shape detail 56 of thescreen mounting bracket 50A, whilestrip mount 55B is attached to the “T”details 56 of thescreen mounting bracket 50B. In an exemplary embodiment, thestrip mounts screen frame 12, there is space between the convex portion of the extrusion and the frame to accommodate the screen thickness. The profile of the strip mounts is such that C-shaped cross section allows the profile to flex and maintain a preload against the screen. Thestrip mounts screen 10. - The top and bottom
screen mounting brackets FIG. 3C ) to capture thestrip mounts mating detail 56 is such that thestrip mounts strip mounts strip mounts screen 10 materials and to have surface hardness characteristics that prevent abrasion to the screen materials during shipping and vibration.Linear protrusions 58 incorporated in thestrip mounts 55 act as “light strips” to reduce reflections of unwanted light onto thescreen 10. A similar result could be obtained by having multiple small striations incorporated into the side wall of the strip mounts rather than the larger linear protrusions. - The
screen mounting bracket strip mounts screen frame 12, holding the top edge of thescreen 10 straight and in the proper location. - The cabinet may be plastic, as is typical for projection display televisions. When mounted to a plastic cabinet, these
brackets 50, in the form of extrusions, form a low profile, structural member along the top edge of thecabinet 20. This structural member can be tied into other structural members of thecabinet 20 to help maintain the critical location of thescreen frame 12. Along with being very low cost to tool, aluminum extrusions tend to be inherently straight, stiff and stable as compared to other parts such as plastic extrusions, formed sheet metal, wood, or molded plastic. - The foregoing illustrates some of the possibilities for practicing the invention. Many other embodiments are possible within the scope and spirit of the invention. For example, while the exemplary embodiment shows aluminum extrusions for the structural members, the concept is also applicable with roll formed sheet metal or sheet metal parts made on progressive dies. It is intended, therefore, that the foregoing description be regarded as illustrative rather than limiting, and that the scope of the invention be given by the appended claims together with their full range of equivalents.
Claims (12)
1. A bracket for mounting a projection display screen to a cabinet from the front of the screen, comprising:
a screen bracket attached to a screen frame having the screen mounted thereto; and
a strip mount, wherein the strip mount is attached to the screen bracket and touches the screen.
2. The bracket of claim 1 wherein the screen bracket is continuous.
3. The bracket of claim 2 wherein the screen bracket has a constant cross section along the elongate dimension.
4. The bracket of claim 1 wherein the strip mount and the screen bracket are extrusions.
5. The bracket of claim 1 wherein the screen bracket is formed of aluminum.
6. The bracket of claim 1 wherein the strip mount is C-shaped.
7. A projection display, comprising:
a cabinet;
a screen mounted in a screen frame; and
bracket for mounting the screen frame, wherein the bracket has a strip mount attached thereto and touching the screen.
8. The projection display of claim 7 wherein the bracket is continuous.
9. The projection display of claim 8 wherein the bracket has a constant cross section along the elongate dimension.
10. The projection display of claim 7 wherein the strip mount and the bracket are extrusions.
11. The projection display of claim 7 wherein the bracket is formed of aluminum.
12. The projection display of claim 7 wherein the strip mount is C-shaped.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2006/001648 WO2007086835A2 (en) | 2006-01-17 | 2006-01-17 | Adaptive projection television screen mounting clamp |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090001858A1 true US20090001858A1 (en) | 2009-01-01 |
Family
ID=38309631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/087,443 Abandoned US20090001858A1 (en) | 2006-01-17 | 2006-01-17 | Adaptive Projection Television Screen Mounting Clamps |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090001858A1 (en) |
EP (1) | EP1984783A2 (en) |
JP (1) | JP2009524079A (en) |
CN (1) | CN101395532A (en) |
WO (1) | WO2007086835A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130201411A1 (en) * | 2012-02-02 | 2013-08-08 | Masataka Nishi | Screen attachment structure and projection television |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101408713B (en) * | 2007-10-11 | 2010-06-02 | 鸿富锦精密工业(深圳)有限公司 | Fastening device and casing |
JP2014126780A (en) * | 2012-12-27 | 2014-07-07 | Mitsubishi Electric Corp | Projection type video display device |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5887959A (en) * | 1996-08-02 | 1999-03-30 | Mitsubishi Denki Kabushiki Kaisha | Display holding device of projection television |
US5995170A (en) * | 1996-07-22 | 1999-11-30 | Matsushita Electric Industrial Co., Ltd. | Housing structure for projection type television receivers and its fabrication method |
US20020181098A1 (en) * | 2001-05-14 | 2002-12-05 | Kenichiro Utsumi | Projector |
US20030095214A1 (en) * | 2001-11-16 | 2003-05-22 | Chen Kuo-Wen | Monitor fabrication method and device |
US6678956B2 (en) * | 2000-05-19 | 2004-01-20 | Hitachi Construction Machinery Co., Ltd. | Method of producing spray deposit on bearing boss |
US6709114B1 (en) * | 2000-01-27 | 2004-03-23 | Thomson Licensing S.A. | Spherical mounting system for three axis adjustment of light projector assembly in a projection television |
US6851810B2 (en) * | 2002-03-13 | 2005-02-08 | Seiko Epson Corporation | Rear projector and producing method thereof |
US6921174B1 (en) * | 2000-01-27 | 2005-07-26 | Thomson Licensing, S.A. | Projection television cabinet having a one-piece reference structure |
US20060262281A1 (en) * | 2003-08-26 | 2006-11-23 | Duggan Scott J | Low profile mirror adjustment system for rear projection display |
US20070209155A1 (en) * | 2004-03-26 | 2007-09-13 | Thomson Licensing Inc. | Interlocking Hinge Mount |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5363149A (en) * | 1992-04-23 | 1994-11-08 | Pioneer Electronic Corporation | Projection television set |
JPH0591078U (en) * | 1992-05-08 | 1993-12-10 | 三菱電機株式会社 | Screen mounting structure for projection TV |
CA2199698A1 (en) * | 1996-09-11 | 1998-03-11 | Monica A. Dettling | Dual-use video display system |
JP2003005276A (en) * | 2001-06-20 | 2003-01-08 | Toshiba Corp | Structure for mounting front panel |
JP2003270716A (en) * | 2002-03-13 | 2003-09-25 | Seiko Epson Corp | Rear projector |
JP2005091492A (en) * | 2003-09-12 | 2005-04-07 | Seiko Epson Corp | Screen device, projector, and method for holding the screen device |
-
2006
- 2006-01-17 CN CNA2006800512751A patent/CN101395532A/en active Pending
- 2006-01-17 US US12/087,443 patent/US20090001858A1/en not_active Abandoned
- 2006-01-17 EP EP06718684A patent/EP1984783A2/en not_active Withdrawn
- 2006-01-17 JP JP2008550286A patent/JP2009524079A/en active Pending
- 2006-01-17 WO PCT/US2006/001648 patent/WO2007086835A2/en active Application Filing
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5995170A (en) * | 1996-07-22 | 1999-11-30 | Matsushita Electric Industrial Co., Ltd. | Housing structure for projection type television receivers and its fabrication method |
US5887959A (en) * | 1996-08-02 | 1999-03-30 | Mitsubishi Denki Kabushiki Kaisha | Display holding device of projection television |
US6709114B1 (en) * | 2000-01-27 | 2004-03-23 | Thomson Licensing S.A. | Spherical mounting system for three axis adjustment of light projector assembly in a projection television |
US6921174B1 (en) * | 2000-01-27 | 2005-07-26 | Thomson Licensing, S.A. | Projection television cabinet having a one-piece reference structure |
US6678956B2 (en) * | 2000-05-19 | 2004-01-20 | Hitachi Construction Machinery Co., Ltd. | Method of producing spray deposit on bearing boss |
US20020181098A1 (en) * | 2001-05-14 | 2002-12-05 | Kenichiro Utsumi | Projector |
US6876492B2 (en) * | 2001-05-14 | 2005-04-05 | Sony Corporation | Projection apparatus panel assembly |
US20030095214A1 (en) * | 2001-11-16 | 2003-05-22 | Chen Kuo-Wen | Monitor fabrication method and device |
US6851810B2 (en) * | 2002-03-13 | 2005-02-08 | Seiko Epson Corporation | Rear projector and producing method thereof |
US20060262281A1 (en) * | 2003-08-26 | 2006-11-23 | Duggan Scott J | Low profile mirror adjustment system for rear projection display |
US20070209155A1 (en) * | 2004-03-26 | 2007-09-13 | Thomson Licensing Inc. | Interlocking Hinge Mount |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130201411A1 (en) * | 2012-02-02 | 2013-08-08 | Masataka Nishi | Screen attachment structure and projection television |
Also Published As
Publication number | Publication date |
---|---|
EP1984783A2 (en) | 2008-10-29 |
WO2007086835A3 (en) | 2008-09-12 |
WO2007086835A2 (en) | 2007-08-02 |
JP2009524079A (en) | 2009-06-25 |
CN101395532A (en) | 2009-03-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |