Display Light Collecting Member Protrusion Pattern Brightness
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Solution Overview
Problem
Conventional display devices face challenges in enhancing front surface brightness, particularly in organic electroluminescent display devices, which limits their performance and usability, especially in outdoor conditions.
Innovation Solution
The implementation of a light collecting member with a protrusion pattern on its surface, including a light collecting layer and a planarization layer with different refractive indices, which refracts and reflects light to increase the amount of light traveling in the upward direction, thereby enhancing front surface brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional flat light collecting member is used, then the device structure is simple, but the front surface brightness is insufficient
Solution Approach 1:
The light collecting member is designed with a protrusion pattern consisting of curved surfaces (prism mountains with semi-circular or semi-oval shapes) instead of flat surfaces. These curved structures refract and reflect light more effectively, directing more light toward the front surface and significantly enhancing brightness without adding complex multi-layer structures.
Solution Approach 2:
The refractive index of the light collecting member is optimized to be higher than that of the planarization layer. This parameter change in refractive index creates stronger light refraction at the interface, improving light collection efficiency and front surface brightness while maintaining a relatively simple single-layer structure.
2Productivity
If the light collecting layer has a higher refractive index than the planarization layer, then light collection efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the light collecting layer should have a refractive index of 1.4 or higher, while the planarization layer has a refractive index of 1.3 or lower. This clear parameter specification provides manufacturing guidance and ensures sufficient refractive index difference for effective light collection, balancing performance requirements with manufacturability.
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 solution significantly increases the brightness of the display device by about 70% compared to conventional devices, improving image clarity and reducing power consumption while allowing for low-temperature processing suitable for flexible displays.
Implementation Method 1
the protrusion pattern is protruded in one direction to change an optical path of a light passing therethrough
Implementation Method 2
which refracts and reflects light to enhance optical path changes
Implementation Method 3
the light collecting layer may have a refractive index different from a refractive index of the planarization layer, and the refractive index of the light collecting layer is greater than the refractive index of the planarization layer
Data Source
AI summary
A display device includes a base substrate, a plurality of pixels disposed on the base substrate, a light collecting member disposed on the plurality of pixels, and an encapsulation member disposed on the light collecting member and facing the base substrate to cover the plurality of pixels, where the light collecting member includes a light collecting layer including a protrusion pattern disposed on an upper surface of the light collecting layer and the protrusion pattern is protruded in one direction to change an optical path of a light passing through the light collecting layer.