Protruding Anode Structure for Cooling Inorganic LED Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inorganic electroluminescent displays with inorganic LEDs face a decrease in luminous efficiency and display characteristics due to increased temperature, leading to potential deterioration in performance.
Innovation Solution
A display device design featuring a substrate with sub-pixels, inorganic light-emitting elements, an anode electrode, and transistors with positive temperature characteristics, where the anode electrode protrudes to efficiently transmit heat generated by the inorganic light-emitting elements to the substrate and transistors, maintaining optimal operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inorganic LEDs are used as display elements, then light use efficiency is improved and environmental resistance is enhanced, but temperature rise causes decrease in luminous efficiency and display characteristics
Solution Approach 1:
The patent converts the harmful heat generated by inorganic LEDs into a beneficial effect by directing it toward the transistor. The heat that would normally deteriorate display characteristics is instead used to increase transistor drive current, which compensates for the luminous efficiency decrease. This is achieved through the protruding anode electrode structure that thermally couples the LED to the transistor, creating a feedback mechanism where heat waste becomes a performance-enhancing factor.
2Reliability
If temperature is reduced to maintain luminous efficiency, then display characteristics are improved, but transistor drive current decreases
Solution Approach 1:
The patent utilizes the heat that would otherwise be wasted as a resource to boost transistor performance. By thermally coupling the inorganic LED to the transistor through the protruding anode electrode, the system converts thermal energy into increased drive current, solving the power limitation without requiring external heating or additional power supply.
Solution Approach 2:
The patent merges the thermal management function with the electrical connection function. The anode electrode serves dual purposes: providing electrical connectivity between the LED and transistor while simultaneously acting as a thermal conduction path. This integration eliminates the need for separate thermal management components and creates a synergistic relationship between the optical and electrical subsystems.
3Reliability
If heat is dissipated from inorganic light-emitting elements, then temperature rise is prevented and luminous efficiency is maintained, but additional heat dissipation structures increase device complexity
Solution Approach 1:
The protruding anode electrode structure performs multiple functions simultaneously: it provides electrical connection, serves as a thermal conduction path, and acts as a heat dissipation structure. By making the anode electrode protrude from the LED, the patent creates a multi-functional component that eliminates the need for separate heat sinks or thermal management structures, thereby maintaining simplicity while achieving effective heat management.
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 prevents the rise in temperature of inorganic light-emitting elements, maintains light output, and increases the drive current of transistors, thereby enhancing display characteristics and stability.
Implementation Method 1
the anode electrode protrudes to efficiently transmit heat generated by the inorganic light-emitting elements to the substrate and transistors
Data Source
AI summary
A display device includes a substrate, a plurality of pixels arrayed on the substrate, an inorganic light-emitting element provided to each of the pixels, an anode electrode electrically coupled to the inorganic light-emitting element, a transistor provided on a first surface of the substrate, and coupling wiring that couples the anode electrode and the transistor. The anode electrode protrudes from an inside to an outside of the inorganic light-emitting element in planar view from a normal direction of the substrate.