Non-evaporable Getter Devices for Flat Panel Display Vacuum Maintenance
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Solution Overview
Problem
Flat panel displays face performance degradation due to internal outgassing, with non-evaporable getter materials having limited absorption efficiency and complex structures increasing manufacturing costs.
Innovation Solution
A flat panel display design incorporating non-evaporable getter devices with securing members on the substrate, strategically positioned near the connections between substrates to enhance gas absorption efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If non-evaporable getter materials are placed in a corner of the flat panel device, then the structure is simple, but the conductance from the outgassing site to the getters is limited by the narrow space between the flat plates, causing reduction of the getters' absorption efficiency
Solution Approach 1:
The patent introduces a cavity structure that creates a third dimension (vertical space) for gas transport. The cavity extends from the front surface of the front plate to the rear surface of the rear plate, providing a dedicated three-dimensional passage that bypasses the limited two-dimensional narrow space between plates. This dimensional change enables efficient gas conductance from outgassing sites to the getter material while maintaining structural simplicity.
2Reliability
If a separate space for containing getter materials is added to the device, then the absorption efficiency is improved, but the structure becomes complicated and the manufacture cost will be increased
Solution Approach 1:
The patent merges the getter material containment function with the existing side wall structure of the flat panel device. The cavity is formed by extending the side wall inward, integrating the getter housing into the structural framework already present in the device. This consolidation achieves efficient gas absorption without adding separate, independent components, thereby avoiding increased structural complexity and manufacturing cost.
3Reliability
If a separate space for containing getter materials is added to the device, then the absorption efficiency is improved, but the manufacture cost will be increased
Solution Approach 1:
The patent segments the device into functional zones: the cavity region for gas transport and the getter material region for absorption. This segmentation allows for optimized gas flow paths and efficient getter material placement while using existing structural elements. By dividing the space functionally rather than adding complete separate subsystems, the manufacturing process remains straightforward and cost-effective.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution increases the absorption efficiency of non-evaporable getter materials, leading to improved performance and extended lifespan of flat panel displays by uniformly absorbing gases and maintaining a stable vacuum.
Implementation Method 1
a sufficient amount of getter material must be incorporated into the flat panel display before it is sealed
Data Source
AI summary
A flat panel display (7) generally includes a front substrate (79) and a rear substrate (70) opposite thereto. The front substrate is formed with an anode (78). The rear substrate is formed with a cathode (71) facing the anode. Several sidewalls (72) are interposed between the front substrate and the rear substrate. A plurality of getter devices (82) are arranged on the front substrate. Thereby, a chamber between the front substrate and the rear substrate is maintained as a low-pressure vacuum. Each of the getter devices includes a base (820), a getter layer (822) comprised of non-evaporable getter material formed thereon, and securing wires (84) arranged on the base.