Large display systems with screen tension adjustability
Large format display systems are described that are reconfigurable between an open configuration designed for performing maintenance on the system and a closed configuration designed for normal operations of the display system. In the closed configuration, the display screen is intentionally subjected to a substantial amount of tensile force to advantageously stabilize the display screen. That substantial tensile force is generated by a sturdy stationary frame that the display screen is anchored against in the closed configuration. When the display system is reconfigured to the open configuration, the display system is no longer anchored against the stationary frame. The process of reconfiguring the display system from the closed configuration to the open configuration includes relieving most of the tensile force applied to the display screen using adjustable tensioning mechanisms of the display systems.
1. A display system comprising:
a support to hold one or more imaging engines;
a screen assembly comprising a display screen mounted within a frame and positionable to receive and display images projected from the one or more imaging engines, the display screen having first and second edges on opposite sides of the display screen,
wherein the display screen is mounted within the frame by: (i) a fixed display screen hanger that fixedly couples a first portion of the first edge relative to the frame such that the first portion is restrained from moving along an axis parallel to the first edge, and (ii) a plurality of movable display screen hangers that movably couple a plurality of portions of the first edge relative to the frame such that the plurality of portions are movable along the axis parallel to the first edge; and
a plurality of triangular peg members with which the plurality of movable display screen hangers interface with the display screen, wherein each of the triangular pegs is rotatably coupled with a respective one of the movable display screen hangers.
2. The display system of claim 1 , wherein the first portion is centered along the first edge of the display screen.
3. The display system of claim 2 , wherein the plurality of portions of the first edge that are movably coupled to the frame by the plurality of movable display screen hangers are positioned on both sides of the fixed display screen hanger.
4. The display system of claim 1 , wherein the first portion is offset of a center of the first edge of the display screen.
5. The display system of claim 4 , wherein the plurality of portions of the first edge that are movably coupled to the frame by the plurality of movable display screen hangers are all positioned on one side of the fixed display screen hanger.
6. The display system of claim 1 , wherein the screen assembly is pivotably coupled to the support.
7. The display system of claim 1 , wherein the frame defines a peripheral slot within which edge portions around an entire periphery of the display screen are disposed.
8. The display system of claim 7 , wherein there is dimensional clearance between the edge portions around an entire periphery of the display screen and the peripheral slot.
9. The display system of claim 1 , wherein the display screen includes a third edge and a fourth edge extending perpendicular to the first edge and the second edge,
wherein the display screen is coupled to the frame along the first edge and the second edge, and
wherein the display screen is not coupled to the frame along the third edge and the fourth edge.
10. The display system of claim 1 , wherein the second edge is coupled to the frame by a plurality of second hangers.
11. The display system of claim 10 , wherein each second hanger includes a spring to apply tension to the display screen.
12. The display system of claim 1 , further comprising a plurality of dampers attached to the frame and in contact with the display screen.
13. The display system of claim 1 , wherein the frame defines a peripheral slot within which the edge portions of the display screen are disposed, and wherein a plurality of elastic bumpers mounted to the frame contact the edge portions of the display screen to center the edge portions of the display screen within the peripheral slot.
14. The display system of claim 1 , wherein each of the elastic bumpers includes a planar face that contacts the edge portions of the display screen.
15. The display system of claim 1 , wherein each of the triangular pegs is engaged within a triangular opening defined through the display screen.
16. The display system of claim 1 , wherein each of the movable display screen hangers includes one or more bearings that movably couple the plurality of movable display screen hangers with the frame.
17. The display system of claim 16 , wherein the one or more bearings are arranged to roll along the frame in response to thermal expansion of the display screen.
18. A display system comprising:
one or more imaging engines, each imaging engine configured to emit a scanning light beam;
a support holding the one or more imaging engines;
a screen assembly coupled to the support and comprising a display screen mounted within a frame that defines a peripheral slot, the display screen positionable to receive and display images projected from the one or more imaging engines, the display screen comprising three different color phosphors and having first and second edges on opposite sides of the display screen, wherein the display screen is mounted within the frame by: (i) a fixed display screen hanger that fixedly couples a first portion of the first edge relative to the frame such that the first portion is restrained from moving along an axis parallel to the first edge, and (ii) a plurality of movable display screen hangers that movably couple a plurality of portions of the first edge relative to the frame such that the plurality of portions are movable along the axis parallel to the first edge, each of the movable display screen hangers including one or more bearings arranged to roll along the frame in response to thermal expansion of the display screen; and
a plurality of triangular peg members with which the plurality of movable display screen hangers interface with the display screen, wherein each of the triangular pegs is rotatably coupled with a respective one of the movable display screen hangers.