OLED Display Panel Fingerprint Region Light Emission Area Adjustment
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Solution Overview
Problem
The high brightness required for fingerprint recognition in organic light-emitting display panels accelerates the decay of organic light-emitting components in fingerprint recognition regions, leading to uneven display lifetimes and frequency of use disparities compared to non-fingerprint recognition regions.
Innovation Solution
An organic light-emitting display panel design with a larger light-emitting region area for organic light-emitting elements in fingerprint recognition regions, allowing lower current density and reduced brightness differences between regions, thereby minimizing lifetime decay disparities and maintaining display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the organic light-emitting element in the fingerprint recognition region is increased to meet fingerprint recognition requirements, then the fingerprint recognition function is achieved, but the lifetime of the organic light-emitting element in the fingerprint recognition region decays faster
Solution Approach 1:
The patent applies local quality by making the light-emitting region area of organic light-emitting elements different between fingerprint recognition region and non-fingerprint recognition region. Specifically, the light-emitting region area in the fingerprint recognition region is designed to be 1.2-1.5 times larger than that in the non-fingerprint recognition region, allowing localized adjustment of current density distribution to balance lifetime across different regions.
2Illumination intensity
If the brightness of the organic light-emitting element in the fingerprint recognition region is increased, then the fingerprint recognition function is achieved, but display uniformity deteriorates due to uneven lifetime decay
Solution Approach 1:
The patent implements local quality by differentiating the light-emitting region area between fingerprint recognition and non-fingerprint recognition regions. The larger area in the fingerprint recognition region compensates for the higher brightness requirement, maintaining uniform current density and preventing uneven lifetime decay that would compromise display uniformity.
Solution Approach 2:
The patent applies parameter changes by adjusting the light-emitting region area parameter to compensate for brightness differences. By making the light-emitting region area in the fingerprint recognition region 1.2-1.5 times larger, the current density is reduced, which compensates for the accelerated lifetime decay caused by higher brightness requirements.
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 design effectively reduces the difference in lifetime decay between fingerprint and non-fingerprint recognition regions, ensuring more uniform organic light-emitting element longevity and improved display consistency.
Implementation Method 1
a plurality of organic light-emitting elements arranged in the display area, the plurality of organic light-emitting elements being located on a side of the base substrate and having at least three different colors
Data Source
AI summary
The present disclosure provides an organic light-emitting display panel and a display device. The organic light-emitting display panel has display area including fingerprint recognition region and non-fingerprint recognition region; and non-display area surrounding the display area. The organic light-emitting display panel includes: a base substrate; organic light-emitting elements arranged in the display area, located on a side of the base substrate and having at least three different colors; and a fingerprint recognition unit arranged in the fingerprint recognition region. The organic light-emitting elements include first organic light-emitting element disposed in the fingerprint recognition region and second organic light-emitting element disposed in the non-fingerprint recognition region, which emit light of a same color. Each organic light-emitting element has a light-emitting region, and the light-emitting region of the first organic light-emitting element has an area S1 larger than an area S2 of the light-emitting region of the second organic light-emitting element.