Quantum Dot Display Thermal Management via Heat Extraction
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Solution Overview
Problem
Display devices using quantum dots for wavelength conversion face reliability and durability issues due to heat degradation, which affects the performance and color reproduction of the liquid crystal display.
Innovation Solution
Incorporating a heat transfer part between the light source and the wavelength conversion member, and a heat dissipation part to efficiently dissipate heat generated from both components, preventing degradation of the wavelength conversion member and maintaining the performance of the quantum dots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are used for wavelength conversion in the display device, then color reproduction is improved, but heat degradation occurs reducing reliability and durability
Solution Approach 1:
The patent extracts the heat management function from the wavelength conversion member by introducing a separate heat transfer part and heat dissipation part. The heat transfer part is positioned between the light source and wavelength conversion member to extract heat before it reaches the quantum dots, while the heat dissipation part dissipates the extracted heat to the surrounding environment. This separation allows the wavelength conversion member to maintain its color reproduction function while the heat management system handles thermal control independently.
Solution Approach 2:
The heat transfer part serves as an intermediary component between the light source and the wavelength conversion member. It absorbs heat from the light source before the heat can reach and degrade the quantum dots, then transfers this heat to the heat dissipation part. This intermediary structure protects the quantum dots from direct thermal exposure while maintaining the overall system's color conversion functionality.
2Volume of moving object
If light source and wavelength conversion member are positioned close together, then device compactness is improved, but heat accumulation increases causing degradation
Solution Approach 1:
The heat transfer part is designed to perform multiple functions simultaneously: it maintains the compact positioning of components by filling the space between the light source and wavelength conversion member, transfers heat from the light source to the heat dissipation part, and protects the quantum dots from thermal degradation. This multi-functional component enables compact device design without sacrificing thermal management effectiveness.
Solution Approach 2:
The patent converts the harmful heat that would normally accumulate in compact designs into a manageable thermal flow. The heat transfer part captures the heat generated by the light source and redirects it through the heat dissipation part to the surrounding environment, transforming what would be a harmful accumulation into a controlled thermal management system that enables compact positioning.
3Reliability
If heat dissipation structures are added to manage thermal effects, then reliability is improved, but device complexity increases
Solution Approach 1:
The heat transfer part and heat dissipation part are integrated into the existing display device structure in a manner that combines thermal management functions with the optical path design. The heat transfer part is positioned within the existing component layout between the light source and wavelength conversion member, while the heat dissipation part is integrated into the device housing or frame structure, merging thermal management with the overall device architecture rather than adding separate complex subsystems.
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 reduces the temperature of the wavelength conversion member, enhancing the reliability and durability of the display device by preventing heat-induced degradation and improving color reproduction.
Implementation Method 1
a heat transfer part adjacent to the light source and the wavelength conversion member; and a heat dissipation part connected to the heat transfer part
Implementation Method 2
an optical member that converts the wavelength of the light generated from the light source such that white light can be incident into the light guide plate or the display panel can be employed in the display device. In particular, quantum dots may be used to convert the wavelength of the light
Data Source
AI summary
Disclosed is a display device. The display device includes a light source; a wavelength conversion member converting a wavelength of light output from the light source; a display panel to which the light is incident; a heat transfer part adjacent to the light source and the wavelength conversion member; and a heat dissipation part connected to the heat transfer part.