OLED Display Color Filter Attachment for Lower-Cost Fabrication
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Solution Overview
Problem
The direct formation of a color filter layer on a display panel with organic light emitting elements increases fabrication costs due to the need for new facilities and materials used in low-temperature processes.
Innovation Solution
A display device design that attaches a color filter layer instead of a polarizing plate, incorporating a substrate with pixel electrodes, organic light emitting layers, a common electrode, and a support layer with a first organic material, minimizing the need for new facilities and low-temperature process materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a color filter layer is directly formed on a display panel including organic light emitting elements, then the color filter layer can serve as an anti-reflection member, but new facilities and low-temperature process materials are required which increases fabrication cost
Solution Approach 1:
The patent divides the color filter layer formation process into separate stages: first forming the organic light emitting elements, then subsequently forming the color filter layer on a separate substrate before attaching it to the display panel. This segmentation allows each layer to be optimized independently, avoiding the need for low-temperature processes during the sensitive organic element formation stage.
Solution Approach 2:
The color filter layer is formed in advance on a separate substrate before the organic light emitting elements are completed. This preliminary action allows the color filter to be fabricated using standard high-temperature processes, and then the completed color filter substrate is attached to the display panel, eliminating the need for low-temperature processing facilities.
2Ease of manufacture
If a color filter layer is directly formed on a display panel, then integration is achieved, but investment in new facilities and materials increases fabrication cost
Solution Approach 1:
The patent segments the display device into modular components: the display panel with organic light emitting elements and the color filter layer on its own substrate. This segmentation allows existing fabrication facilities to be used for both components independently, avoiding the need for integrated low-temperature processing facilities and reducing overall device complexity.
Solution Approach 2:
A separate substrate acts as an intermediary carrier for the color filter layer. This intermediary allows the color filter to be fabricated using standard processes on a dedicated substrate, then transferred and attached to the display panel, eliminating the need for complex integrated fabrication facilities.
Data Source
AI summary
A display device includes a substrate, pixel electrodes on the substrate, a bank in which opening areas partially exposing the pixel electrodes are defined, organic light emitting layers disposed on the pixel electrodes, a common electrode disposed on the organic light emitting layers and the bank, an encapsulation layer disposed on the common electrode, a touch electrode which is disposed on the encapsulation layer and does not overlap the opening areas in a thickness direction, a first adhesive member disposed on the touch electrode, a first light blocking layer which is disposed on the first adhesive member and does not overlap the opening areas in the thickness direction, color filters which are disposed on the first adhesive member and overlap the opening areas in the thickness direction, and a support layer which is disposed on the first light blocking layer and the color filters and includes a first organic material.