摘要:
The described embodiments relate generally to computing devices including liquid crystal displays (LCDs) and more particularly to methods for attaching a cover glass layer to a structural housing while minimizing an amount of stress transferred through the cover glass layer to the LCD module. A continuous and compliant foam adhesive can be used to bond the cover glass layer to a structural. The compliant bond can absorb and distribute local stress concentrations caused by structural loads, mismatched surfaces and differing thermal expansion rates between various structures and cover glass layer. This can reduce stress concentrations in the cover glass layer that can lead to stress induced birefringence in the LCD cell. In other embodiments, the cover glass layer can be attached using magnets or a tongue and groove design.
摘要:
The described embodiments relate generally to computing devices including liquid crystal displays (LCDs) and more particularly to methods for attaching a backlight assembly to a cover glass layer while minimizing an amount of stress transferred through the cover glass layer to the LCD module. A continuous and compliant foam adhesive can be used to bond the cover glass layer to the backlight assembly. The compliant bond can absorb and distribute local stress concentrations caused by structural loads, mismatched surfaces and differing thermal expansion rates between various structures and cover glass layer. This can reduce stress concentrations in the cover glass layer that can lead to stress induced birefringence in the LCD cell. In another embodiment, a series of rigid plates can be bonded to the cover glass layer and attached to the backlight assembly. Point loads applied from the backlight assembly can be distributed over a larger area due to the resilience of the rigid plates.
摘要:
In a steam turbine control system, the mechanical/hydraulic input to a mechanical control link within a servo enclosure controlling the steam supply valves to the turbine is replaced by an electrical/hydraulic control system while retaining all mechanical/hydraulic connections between the servo enclosure and the steam valves. A hydraulic cylinder is coupled to a control link in the servo enclosure which operates the steam valves. The cylinder is actuated by a servo control valve for modulating the flow of steam to the turbine. A fast trip valve forms part of the hydraulic fluid supply to the piston and is movable in response to a cutoff of hydraulic pressure fluid to the shut-off valve to shift and deadend the hydraulic fluid supply to the piston whereby, in response to a system upset, the shut-off valve instantaneously stops the supply of hydraulic fluid to the piston and thereby instantaneously actuates the steam valves to preclude flow of steam to the turbine.
摘要:
Embodiments include a system having a turbine support key having a set of key segments selectively stackable together in a plurality of combinations to adjust a thickness between turbine supports based solely on a selection of the key segments from the set.
摘要:
Embodiments include a system having a turbine support key having a set of key segments selectively stackable together in a plurality of combinations to adjust a thickness between turbine supports based solely on a selection of the key segments from the set.