OLED Display Peripheral Filter Layout for Reflection and UV Curing
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Solution Overview
Problem
Organic EL display devices face issues with external light reflection in the peripheral region, leading to visual recognition deterioration and reliability concerns due to insufficient ultraviolet light reaching the filler during manufacturing, causing display defects.
Innovation Solution
A display device design featuring a metal layer outside the effective display region and a filter-layered body with a first and second color filter, where the second color filter has holes to allow ultraviolet light to cure the filler, while the first filter blocks external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-blocking material is provided in the peripheral region to suppress external light reflection, then visual recognition is improved, but ultraviolet light is blocked and filler curing is insufficient
Solution Approach 1:
The peripheral region is divided into multiple layers with different functions: a first peripheral region with light-blocking material for visual recognition, and a second peripheral region with ultraviolet-transmitting material for filler curing. This segmentation allows each region to optimize its specific function without interfering with the other.
Solution Approach 2:
Different materials with different optical properties are applied to different local regions of the peripheral area. The first peripheral region uses light-blocking material to suppress external light reflection, while the second peripheral region uses ultraviolet-transmitting material to allow filler curing. Each local region has optimized quality for its specific purpose.
2Illumination intensity
If a filter-layered body with color filters is provided to block external light, then visual recognition is improved, but the structure becomes more complex
Solution Approach 1:
The peripheral region structure serves multiple functions: it blocks external light to improve visual recognition, allows ultraviolet light transmission for filler curing, and provides structural support. By integrating these functions into a unified peripheral region design with layered materials, the need for separate complex filter structures is reduced.
Solution Approach 2:
The peripheral region acts as an intermediary structure between the display region and the external environment. It mediates between the conflicting requirements of external light blocking and ultraviolet light transmission by using layered materials with different optical properties, simplifying the overall device structure.
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 suppresses external light reflection and ensures adequate filler curing, maintaining reliability by allowing sufficient ultraviolet light to reach the peripheral region.
Implementation Method 1
a first color filter and a second color filter having a hole... the first filter blocks external light reflection
Implementation Method 2
the second color filter has holes to allow ultraviolet light to cure the filler
Implementation Method 3
there is an issue that visual recognition deteriorates due to reflection of external light by such a metal layer
Data Source
AI summary
There is provided a display device which includes a metal layer provided outside an effective display region, an electrode that extends outward from the effective display region, and a filter-layered body provided facing the metal layer. The filter-layered body includes a first color filter and a second color filter having a hole.