AMOLED Panel Luminance Uniformity via Capacitance Tuning
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Solution Overview
Problem
AMOLED panels face luminance unevenness due to uneven film thickness, which affects display quality.
Innovation Solution
An AMOLED panel with regions of different thicknesses, featuring unit pixel driving circuits with storage capacitors of varying capacitance values to ensure consistent luminance across regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the OLED panel uses uniform film thickness in vapor deposition, then the manufacturing process is simple, but the display luminance becomes uneven across different regions
Solution Approach 1:
The patent applies local quality by creating different film thicknesses in different regions of the OLED panel. Specifically, the light-emitting layer has a first thickness in a first region and a second thickness in a second region, where the thicknesses differ. This non-uniform thickness distribution compensates for luminance unevenness, ensuring that regions with thicker films (which emit more light) are balanced against regions with thinner films, thereby achieving uniform overall luminance across the display.
2Illumination intensity
If the OLED panel uses non-uniform film thickness to compensate for luminance unevenness, then the display luminance uniformity improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by deliberately varying the film thickness parameter across different regions of the OLED panel. The light-emitting layer is configured with a first thickness in a first region and a second thickness in a second region, where these thickness parameters are specifically designed to compensate for luminance unevenness. This controlled parameter variation allows the system to achieve uniform luminance output while managing manufacturing precision requirements through deliberate design rather than attempting to maintain uniform thickness.
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 reduces luminance unevenness by configuring storage capacitors to match display luminance in regions with different film thicknesses, thereby enhancing overall display quality.
Implementation Method 1
a unit pixel driving circuit having storage capacitors with different capacitance values such that the panel has a same display luminance in the first region and the second region
Data Source
AI summary
The present disclosure discloses an AMOLED panel and a method for reducing the display luminance unevenness thereof. The panel with different thicknesses, the panel having at least a first region having a first thickness and a second region having a second thickness; a unit pixel driving circuit in the first region and a unit pixel driving circuit in the second region have storage capacitors with different capacitance values such that the panel has a same display luminance in the first region and the second region.