Flat Panel Display Electron Emission Uniformity Control
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Solution Overview
Problem
Flat panel display apparatuses face issues with differences in electron emitting states between regions near and away from spacers, leading to uneven luminance and picture quality deterioration over time, necessitating a method to uniform these states before actual display operation.
Innovation Solution
A processing method involving initial electron emitting state measurement and an aging process where higher voltages are applied to regions showing high initial electron emitting states for a predetermined time to equalize electron emitting states, ensuring uniformity and reducing aging changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spacers are arranged between the cathode panel and anode panel, then the space between panels is maintained, but differences in electron emitting states occur between regions near and away from spacers
Solution Approach 1:
The patent applies different voltage conditions to different regions of the electron emitting regions based on their proximity to spacers. Regions near spacers receive different voltage treatment compared to regions away from spacers, addressing the local variations in electron emitting states caused by the spacers' presence.
Solution Approach 2:
The patent performs an aging process before actual display operation to pre-adjust the electron emitting states. By applying specific voltages during this preliminary period, the system equalizes the electron emitting characteristics across different regions before normal operation begins.
2Manufacturing precision
If aging process is performed to equalize electron emitting states, then display quality is improved, but additional processing time is required
Solution Approach 1:
The aging process applies voltages periodically or in discrete stages rather than continuously. The process involves setting specific voltage conditions for predetermined periods, allowing the electron emitting states to be adjusted in controlled intervals rather than requiring continuous processing.
3Manufacturing precision
If higher voltage is applied to regions with high initial electron emitting state, then electron emitting uniformity is achieved, but energy consumption increases
Solution Approach 1:
The patent applies different voltage levels to different regions based on their specific needs. Rather than uniformly increasing voltage across the entire display, only specific regions with high initial electron emitting states receive higher voltage during the aging process, minimizing overall energy consumption while achieving the desired uniformity.
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 method effectively reduces differences in electron emitting states, enhancing display quality by controlling electron emitting characteristics and minimizing variations in aging changes across the display apparatus.
Implementation Method 1
applying a predetermined voltage to each of the electron emitting regions to thereby allow electrons to be emitted from each of the electron emitting regions
Implementation Method 2
executing an aging process for applying a voltage, for a predetermined time, higher than that of the electron emitting region in the row showing the low initial electron emitting state to the electron emitting region in the row showing the high initial electron emitting state
Data Source
AI summary
A processing method of a flat panel display apparatus in which a cathode panel having electron emitting regions and an anode panel having phosphor regions and an anode electrode are joined is provided. A predetermined voltage is applied to each electron emitting region, thereby allowing electrons to be emitted therefrom. In a predetermined row, initial electron emitting states in the electron emitting regions are measured. After that, a voltage higher than that of the electron emitting region in a row showing the low initial electron emitting state is applied to the electron emitting region in the row showing the high initial electron emitting state for a predetermined time, thereby performing aging.