Electroluminescent Display Panel Abnormal Edge Opening
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Solution Overview
Problem
Existing display technologies face challenges in creating abnormally-shaped display screens, particularly due to the 'sawtooth' effect in abnormally-shaped display areas, which are difficult to compensate for using current software techniques and result in display defects such as uncontrollable brightness and reduced light-emitting efficiency.
Innovation Solution
An electroluminescent display panel design featuring a base substrate with pixel definition layers and light-emitting function layers that include both normally-shaped and abnormally-shaped opening regions, where the abnormally-shaped regions have smaller areas, and light-emitting function layers with equal areas and shapes, covered by anodes and color resistance layers, using a fine metal mask for fabrication, and a method involving light-emission aging with compensation current to enhance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If abnormally-shaped opening regions are used at the edge of the display area, then the display screen can achieve abnormal shapes, but the 'sawtooth' effect occurs causing uncontrollable brightness and display defects
Solution Approach 1:
The patent applies local quality by making the opening regions at the edge of the display area have different areas compared to normal opening regions. Specifically, the abnormal opening regions have smaller areas to compensate for the sawtooth effect, while maintaining the same light-emitting color. This local adjustment of opening region areas ensures uniform brightness across the entire display area, resolving the contradiction between achieving abnormal display shapes and maintaining brightness uniformity.
2Manufacturing precision
If the area of abnormally-shaped opening regions is reduced, then brightness uniformity is improved, but the light-emitting area is reduced
Solution Approach 1:
The patent applies parameter changes by adjusting the area parameter of opening regions at the edge of the display area. The abnormal opening regions have smaller areas compared to normal opening regions, which compensates for the sawtooth effect and ensures uniform brightness. This parameter adjustment optimizes the balance between brightness uniformity and light-emitting area, resolving the contradiction between these two factors.
3Manufacturing precision
If a fine metal mask is used for fabrication, then manufacturing precision is improved, but material accumulation occurs on the mask reducing its service lifetime
Solution Approach 1:
The patent applies parameter changes by optimizing the area parameters of opening regions at the edge of the display area. By making abnormal opening regions have smaller areas, the patent reduces material accumulation on the fine metal mask during fabrication, thereby extending its service lifetime while maintaining pattern accuracy and brightness 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
This design effectively eliminates the 'sawtooth' effect by ensuring uniform brightness and extending the service lifetime of the display panel, while avoiding the need for frequent adjustments to the fine metal mask and reducing material accumulation issues, thus improving display quality and longevity.
Implementation Method 1
electroluminescent display panel
Data Source
AI summary
The disclosure discloses an electroluminescent display panel, a method for fabricating the same, and a display device. Where the electroluminescent display panel includes: a base substrate; a pixel definition layer located on the base substrate and including a plurality of opening regions for defining sub-pixel light-emitting areas; and light-emitting function layers, which cover the plurality of opening regions in a one-to-one correspondence manner, of sub-pixels; where the plurality of opening regions include normally-shaped opening regions and abnormally-shaped opening regions at an edge of an abnormally-shaped display area; and an area of each of the abnormally-shaped opening regions is smaller than an area of a normally-shaped opening region for defining a sub-pixel having a same light-emitting color.