On-Chip Color Filter Structure to Prevent Peeling in OLED Displays
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Solution Overview
Problem
Conventional light emitting devices with on-chip color filters (OCCF) are prone to peeling, leading to deteriorated display characteristics due to positional displacement and low light utilization efficiency.
Innovation Solution
Incorporating a transparent resin at the bottom of the filter portions of the color filter in a light emitting device to enhance adhesion and prevent peeling, while maintaining light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an on-chip color filter structure is used to reduce positional displacement and improve manufacturing precision, then manufacturing precision is improved, but the color filter may peel off leading to deteriorated display characteristics
Solution Approach 1:
A transparent resin layer is introduced as an intermediary between the color filter and the underlying structure. This resin layer serves as an adhesive mediator that bonds the color filter to the substrate, preventing peeling while maintaining optical transparency. The resin layer resolves the contradiction by providing mechanical attachment without compromising light transmission, thus preserving both manufacturing precision and reliability.
Solution Approach 2:
The color filter structure is enhanced by combining it with a transparent resin material to form a composite structure. This composite approach integrates the optical filtering function of the color filter with the adhesive and protective properties of the transparent resin, creating a multi-functional layer that prevents peeling while maintaining display characteristics.
2Device complexity
If the color filter is placed on a different substrate to simplify the color filter structure, then the color filter structure is simplified, but the distance between OLED element and color filter becomes long reducing light utilization efficiency
Solution Approach 1:
The color filter is merged with the OLED element on the same substrate, eliminating the need for separate substrate placement. This integration reduces the distance between the light emitting element and color filter, minimizing light loss through absorption and scattering over long distances. The merging of these components on a single substrate directly improves light utilization efficiency while maintaining structural simplicity.
3Loss of energy
If the color filter is provided on the same substrate as OLED element to reduce distance and improve light utilization efficiency, then light utilization efficiency is improved, but the color filter may peel off during manufacturing
Solution Approach 1:
A transparent resin layer is introduced as an intermediary between the color filter and the substrate. This resin layer serves as an adhesive mediator that bonds the color filter to the substrate, preventing peeling during manufacturing and use. The resin layer resolves the contradiction by providing mechanical attachment without compromising light transmission, thus preserving both light utilization efficiency and reliability.
Solution Approach 2:
The physical and chemical properties of the interface between the color filter and substrate are modified by introducing the transparent resin layer. This parameter change in the interface properties enhances adhesion strength while maintaining optical transparency, allowing the color filter to remain firmly attached during manufacturing and operation without affecting light transmission efficiency.
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 transparent resin at the bottom of the filter portions improves adhesion, reducing peeling and maintaining luminance by preventing absorption of emitted light, thus enhancing the display device's performance.
Implementation Method 1
the filter portion of at least one color of the filter portions of the plurality of colors includes a transparent resin at a bottom of the filter portion
Data Source
AI summary
Light emitting devices with suppressed color filter peeling are disclosed. In one example, a light emitting device includes light emitting elements arranged two-dimensionally and a filter provided above the light emitting elements and including filter portions of a plurality of colors. The filter portion of at least one color of the filter portions includes a transparent resin at a bottom of the filter portion.