In one exemplary embodiment, a hinge assembly having a counterbalance spring, a friction mechanism, and an independent pop-up element attached to a shaft. In one embodiment, a hinge assembly having a counterbalancing spring and an independent pop-up element attaches a display assembly to a base assembly of a portable computer.
1. A hinge assembly, comprising:
a shaft;
a counterbalance spring coupled to said shaft;
a friction element disposed on said shaft; and
a pop-up element having a torsion bar clutch disposed adjacent to said shaft, wherein said counterbalance spring, said friction element, and said pop-up element having a torsion bar clutch are associated with independent mechanisms of said hinge assembly and wherein said pop-up element comprises a pop-up arm disposed around said shaft and wherein a strike pin coupled to said shaft limits a movement of said pop-up arm.
2. The hinge assembly of claim 1 , wherein said counterbalance spring supports a weight of a display assembly relative to a base assembly of a portable computer.
3. The hinge assembly of claim 2 , wherein said friction element comprises an clip-style friction clutch.
4. The hinge assembly of claim 3 , wherein said clip-style friction clutch maintains said display assembly in a static position relative to said base assembly.
5. The hinge assembly of claim 2 , wherein said pop-up element stores an opening force to create a certain amount of initial travel for said display assembly relative to said base assembly.
6. The hinge assembly of claim 1 , wherein said counterbalance spring comprises a coiled torsion spring.
7. A portable computer, comprising:
a display assembly having a display screen and a display housing;
a base assembly;
a counterbalance hinge assembly that couples said display assembly to said base assembly; and
a pop-up feature having a torsion bar clutch disposed near said counterbalance hinge assembly, wherein said pop-up feature is part of a mechanism that is independent of said counterbalance hinge assembly, said counterbalance hinge assembly comprises a friction clutch and a coiled torsion spring coupled to an elongated shaft and said pop-up feature comprises a pop-up arm disposed around said elongated shaft, and wherein a strike pin coupled to said elongated shaft limits a movement of said pop-up arm.
8. The portable computer of claim 7 , wherein said display housing comprises metal.
9. The portable computer of claim 8 , wherein said display housing comprises aluminum.
10. The portable computer of claim 8 , wherein said display housing is titanium.
11. The portable computer of claim 8 , wherein said display housing comprises steel.
12. The portable computer of claim 7 , wherein said counterbalance hinge assembly comprises a bracket assembly having a top bracket coupled to said display assembly and a bottom bracket coupled to said base assembly.
13. The portable computer of claim 7 , wherein said counterbalance hinge assembly allows said display assembly to rotate relative to said base assembly up to 180 degrees.
14. A portable computer, comprising:
a display assembly having a display screen and a display housing;
a base assembly; and
at least two independent hinge assemblies comprising a first and a second hinge assemblies, each having at least three independent mechanisms comprising torsional and frictional elements, including a counterspring assembly, a pop-up element having a torsion bar clutch, and a friction element, that couples said display assembly to said base assembly,
wherein said first and second hinge assemblies comprise a counterbalance spring coupled to an elongated shaft to support a weight of said display assembly, a pop-up feature disposed near said first and second hinge assemblies, said pop-up feature comprises a pop-up arm disposed around said elongated shaft and wherein a strike pin coupled to said elongated shaft limits a movement of said pop-up arm.
15. The portable computer of claim 14 , wherein said pop-up feature is independent of said counterbalance hinge assembly.
16. The portable computer of claim 14 , wherein said hinge assemblies include a friction clutch to maintain said display assembly in a static position.
17. The portable computer of claim 14 , wherein said counterbalance spring comprises coiled torsion spring.
18. The portable computer of claim 14 , wherein said first and second hinge assemblies comprise a bracket assembly having a top bracket coupled to said display assembly and a bottom bracket coupled to said base assembly.
19. The portable computer of claim 14 , wherein said display housing is aluminum.
20. The portable computer of claim 14 , wherein said display housing comprises titanium.
21. The portable computer of claim 14 , wherein said display housing comprises steel.