Luminescent Panel Aging via Segmented Thermal Control
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Solution Overview
Problem
Luminescent panels experience luminance degradation due to temperature variations during the aging process, leading to inconsistent image quality and reduced reliability.
Innovation Solution
A method for manufacturing luminescent panels involves dividing the luminescent area into segment areas, selecting specific areas for aging, and controlling the emission pixels to generate an aging area, which helps in suppressing temperature variations and maintaining uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emission is performed over the entire surface of the luminescent panel at once during the aging process, then the aging process can be completed efficiently, but temperature variation in the plane of the luminescent panel increases
Solution Approach 1:
The luminescent panel surface is divided into multiple segment areas, and aging is performed sequentially on each segment area rather than the entire surface at once. This segmentation approach maintains aging process efficiency while reducing temperature variation across the panel by limiting the active emission area at any given time.
Solution Approach 2:
The aging process is implemented as a periodic sequence where different segment areas are activated in alternating periods. Each segment area undergoes aging during its designated period while other segments remain inactive, creating a cyclic pattern that controls overall temperature rise while maintaining continuous aging progress across the entire panel.
2Temperature
If the aging process does not process the entire surface at once, then temperature variation is reduced, but the aging process does not sufficiently suppress temperature variation and luminance variation still occurs
Solution Approach 1:
Adjacent segment areas are designed with different luminance characteristics during aging - some areas emit at higher luminance while adjacent areas emit at lower luminance. This local quality differentiation creates a compensatory effect where heat generated in high-luminance areas is balanced by the lower heat generation in adjacent low-luminance areas, thereby suppressing overall temperature variation and preventing luminance non-uniformity.
3Reliability
If emission elements are susceptible to heat from temperature variation, then aging can be performed to prevent luminance decrease, but temperature variation causes life variation among emission elements
Solution Approach 1:
By implementing periodic aging where different segment areas are activated in alternating periods, the thermal load on any single emission element is distributed over time rather than subjected to continuous high-temperature stress. This periodic activation pattern allows emission elements to undergo necessary aging for luminance stabilization while avoiding excessive heat accumulation that would reduce their operational lifespan.
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
This approach effectively reduces temperature variations, prolongs the lifespan of emission elements, and ensures consistent image quality over time, enhancing the reliability of luminescent panels and display devices.
Implementation Method 1
a third step of aging the emission pixel in the first area by energization to generate an aging area
Data Source
AI summary
The application discloses a method for manufacturing a luminescent panel including a luminescent area provided with emission pixels arranged in row and column directions. The manufacturing method includes a first step of dividing the luminescent area into segment areas so that each of the segment areas includes at least one of the emission pixels; a second step of selecting a part of the segment areas as a first area, and the segment areas adjacent to the first area in the row and column directions as second areas; and a third step of aging the emission pixel in the first area by energization to generate an aging area.