Color Conversion Display Structure With Integrated Spacer Filter
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Solution Overview
Problem
Current display devices, such as OLEDs, face challenges in achieving improved light efficiency and display quality due to the distance between light emitting diodes and color conversion layers, as well as inefficiencies in the manufacturing process, particularly in the formation of spacers and color filters.
Innovation Solution
The display device incorporates a color conversion layer in the lower structure to reduce the distance to light emitting diodes, and a method that forms a spacer and third color filter from the same material, eliminating the need for a separate mask process, thereby enhancing light efficiency and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the color conversion layer is disposed far from the light emitting diodes, then the manufacturing process is simpler, but the light efficiency and conversion rate decrease
Solution Approach 1:
The color conversion layer and lower substrate are integrated into a single component, allowing the color conversion layer to be disposed close to the light emitting diodes on the lower substrate, thereby improving light conversion rate without complicating the manufacturing process
2Manufacturing precision
If separate mask processes are used to form spacers and color filters, then the manufacturing precision is improved, but the manufacturing time and complexity increase
Solution Approach 1:
The spacer and color filter are formed from the same material layer through a single patterning process, eliminating the need for separate mask processes while maintaining manufacturing precision and reducing production time
Solution Approach 2:
A single material layer serves dual functions as both the spacer and color filter, allowing one patterning process to create both structures with the required precision without additional manufacturing steps
3Reliability
If multiple separate layers are used for spacer and color filter, then the functional performance is improved, but the device complexity increases
Solution Approach 1:
A single material layer performs both spacer and color filter functions simultaneously, reducing the number of layers and process steps while maintaining the functional performance required for both structures
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 configuration improves light efficiency and display quality by increasing the conversion rate of incident light and reduces the gap between structures, while simplifying the manufacturing process by integrating the spacer and color filter formation.
Implementation Method 1
The color conversion layer may convert a wavelength of light provided from the organic light emitting diode. Accordingly, the organic light emitting display may emit light having a color different from that of incident light.
Data Source
AI summary
A display device includes an upper substrate, a lower substrate opposite to the upper substrate, light emitting diodes on the lower substrate, a color conversion layer on the lower substrate and including a light transmission pattern in a first light emitting area, a first color conversion pattern in a second light emitting area, and a second color conversion pattern in a third light emitting area, a color filter layer under the upper substrate and including a first color filter in the first light emitting area and the light blocking area, a second color filter in the second light emitting area and the light blocking area, and a third color filter in the third light emitting area and having an island pattern shape, and a spacer in the light blocking area between the color filter layer and the color conversion layer and including a same material as the third color filter.