Display Light Control Stack for Image Clarity and Touch Sensing
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving enhanced display quality and efficient input detection, particularly in organic light-emitting displays, due to issues with light-blocking layers and color filters that affect image clarity and touch sensitivity.
Innovation Solution
The display apparatus incorporates a substrate with a display element layer, a bank layer, an input detection layer, and a light control layer featuring a first and second light-blocking layer with overlapping openings and a valley pattern, along with a color filter layer to enhance light control and input detection, while using a touch insulating layer to prevent heat and electricity transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-blocking layer is added to improve display quality, then light control capability is improved, but device complexity increases
Solution Approach 1:
The light-blocking layer is divided into multiple segments: a first light-blocking layer with a first opening, a second light-blocking layer with a second opening, and a third light-blocking layer with a third opening. Each layer serves a specific function in controlling light from different light-emitting devices, allowing precise light management while maintaining modular complexity
Solution Approach 2:
The patent introduces a vertical stacking dimension by placing multiple light-blocking layers at different heights above the substrate. The first, second, and third light-blocking layers are positioned at different vertical positions, creating a multi-dimensional light control architecture that improves display quality without requiring lateral expansion
2Manufacturing precision
If color filter layers are added to improve display quality, then color accuracy is improved, but device complexity increases
Solution Approach 1:
The color filter layer is merged with the light-blocking layers to form an integrated light control assembly. The color filter is positioned between the second and third light-blocking layers, combining light blocking and color filtering functions into a single integrated structure, thereby improving color accuracy while minimizing the increase in device complexity
Solution Approach 2:
The integrated structure of light-blocking layers and color filter serves multiple functions simultaneously: it blocks unwanted light from adjacent light-emitting devices, filters colors to improve display accuracy, and maintains a compact form factor. This multi-functionality reduces the need for separate components
3Illumination intensity
If multiple light-blocking layers are stacked to improve light control, then display quality is improved, but manufacturing complexity increases
Solution Approach 1:
The first, second, and third light-blocking layers are pre-formed with their respective openings before being assembled into the final structure. The color filter is also prepared separately and then integrated between the second and third light-blocking layers. This preliminary preparation simplifies the manufacturing process by allowing components to be fabricated independently and then assembled
Data Source
AI summary
A display apparatus is disclosed. The display apparatus may include a substrate, a display element layer on the substrate, which may include a plurality of light-emitting devices and a lower opening to define respective emission areas of the plurality of light-emitting devices, an input detection layer on the display element layer, and a light control layer on the input detection layer, wherein the light control layer may include a first light-blocking layer including a middle opening that is to at least partially overlap the lower opening, a color filter layer to fill the middle opening, which may be on the first light-blocking layer, and a second light-blocking layer on the color filter layer, which may include an upper opening that is to at least partially overlap the middle opening, and the first light-blocking layer may include a valley pattern to overlap a bank layer.