Quantum Dot Display Partition Wall Structure Against Impurity Penetration
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Solution Overview
Problem
Quantum dots in display devices deteriorate due to impurities penetrating through the partition wall structure, leading to uneven luminance and reduced display quality.
Innovation Solution
A display device with a partition wall structure comprising sub-rods that prevent the penetration of impurities such as oxygen and moisture, featuring a lower substrate with LED light sources and an upper substrate with quantum dot color filters, bonded by an optical bonding material, and an inorganic encapsulation layer to control light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional partition wall structure is used, then the device complexity is low, but impurities penetrate through the partition wall leading to quantum dot deterioration and uneven luminance
Solution Approach 1:
The partition wall is segmented into multiple sub-rods arranged in an array pattern, creating multiple barrier lines that effectively block impurity penetration paths while maintaining structural manageability and manufacturing feasibility
Solution Approach 2:
The partition wall structure transitions from a conventional single-layer design to a multi-dimensional array of sub-rods with specific spacing (1-100 μm intervals), adding spatial complexity in the horizontal plane to enhance impurity blocking capability
2Reliability
If the partition wall structure is made more complex to prevent impurity penetration, then quantum dot protection improves, but the manufacturing process becomes more difficult
Solution Approach 1:
The sub-rod dimensions and spacing are optimized within specific parameter ranges (1-100 μm intervals, 1-100 μm height) to achieve effective impurity blocking while maintaining compatibility with existing manufacturing processes and materials
3Reliability
If sub-rods are closely spaced to prevent impurity penetration, then protection effectiveness increases, but light transmission may be affected
Solution Approach 1:
The partition wall structure implements local quality enhancement by concentrating sub-rods at the edge areas where impurity penetration is most likely, while maintaining light transmission properties in the central display regions through optimized sub-rod spacing and dimensions
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 solution effectively minimizes impurity penetration, ensuring reliable display quality and uniform luminance by preventing quantum dot deterioration.
Implementation Method 1
an inorganic encapsulation layer configured to control light reflection
Implementation Method 2
a bonding layer including an optical bonding material configured to transmit light and the bonding layer may be configured to bond the lower substrate and the upper substrate using the optical bonding material
Implementation Method 3
the color conversion unit may convert the wavelength of light provided from the lower substrate. Accordingly, the display device, including the color conversion unit, may emit light having a different color from the incident light
Data Source
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AI summary
A display device includes a lower substrate comprising at least one light-emitting diode (LED) light source, an upper substrate comprising at least one quantum dot color filter, and a bonding layer configured to bond the lower substrate and the upper substrate. The upper substrate may include a partition wall structure including least one sub-rod is repeatedly provided in an edge area of a partition wall layer.