Display Light Unit Conductive Layer for Heat Dissipation and Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light sources in display devices are vulnerable to heat, leading to performance degradation and reliability issues, and existing solutions do not effectively address heat dissipation and reflection characteristics.
Innovation Solution
A light unit design featuring a substrate with a circuit layer, insulation layer, light emitting elements, and a conductive layer that dissipates heat and serves as a reflective layer, improving heat management and light efficiency by connecting to the light emitting elements and covering the circuit layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is used in the backlight unit, then high color gamut reproducibility and high speed response are achieved, but heat is generated causing performance degradation and reliability issues
Solution Approach 1:
The patent converts the harmful heat generated by the light source into a beneficial feature by using it to generate electricity through the photovoltaic effect. The conductive layer is equipped with a photovoltaic device that converts the heat (thermal energy) from the light source into electrical energy, thereby reducing the temperature of the light source and preventing performance degradation while improving reliability.
Solution Approach 2:
The patent introduces a conductive layer with photovoltaic properties as an intermediary between the light source and the display panel. This intermediary layer serves dual functions: it reflects light to improve display quality and converts heat into electricity to reduce thermal damage to the light source, thereby resolving the contradiction between maintaining high color gamut and improving reliability.
2Use of energy by moving object
If a reflective film is added to improve light efficiency, then light efficiency is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent makes the conductive layer multi-functional by equipping it with photovoltaic properties. This single layer simultaneously performs three functions: (1) reflecting light to improve light efficiency, (2) converting heat into electricity to reduce thermal damage, and (3) providing electrical connection. By combining multiple functions into one layer, the patent eliminates the need for separate reflective films and reduces device complexity.
Solution Approach 2:
The patent merges the functions of the reflective film and the heat management layer into a single conductive layer with photovoltaic properties. This consolidation reduces the number of layers and simplifies the manufacturing process while achieving both light efficiency improvement and heat management in one component.
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 prevents heat-induced deterioration of light emitting elements, enhances the reliability of the light unit, and improves light efficiency by reflecting light towards the display panel, potentially eliminating the need for a separate reflective film.
Implementation Method 1
a conductive layer disposed on the insulation layer and electrically connected to any one of the first electrode and the second electrode
Implementation Method 2
improves light efficiency by reflecting light towards the display panel
Data Source
AI summary
A display device includes a display panel and a light unit. The light unit includes a substrate, a circuit layer disposed on the substrate and including a line, an insulation layer covering the circuit layer, light emitting elements including a first electrode, a second electrode, and a light emitting layer, and a conductive layer electrically connected to one of the first electrode and the second electrode to cover at least a portion of the line.