Multi-Color LED Ohmic Contact Layout for White Balance
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Solution Overview
Problem
The manufacturing and activation of LEDs with different sizes or driving currents for achieving white color balance are complicated processes.
Innovation Solution
An electronic device with a substrate and light-emitting elements of different colors, where the area of the ohmic contact electrodes is varied to optimize current density and light-emitting efficiency, allowing for uniform light-emitting efficiencies and achieving white color balance without complex manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LEDs with different sizes or different driving currents are used to achieve white color balance, then the light-emitting efficiency can be optimized, but the manufacturing and activation process becomes complicated
Solution Approach 1:
The patent applies local quality by varying the area of ohmic contact electrodes for different light-emitting elements. Specifically, first light-emitting elements have first ohmic contact electrodes with a first area, while second light-emitting elements have second ohmic contact electrodes with a second area different from the first area. This localized variation in electrode area optimizes current density distribution and light-emitting efficiency for each element type without requiring different LED sizes or complex manufacturing processes.
2Illumination intensity
If LEDs with different sizes are used to achieve white color balance, then the light output can be adjusted, but the manufacturing process becomes complicated
Solution Approach 1:
The patent applies parameter changes by modifying the area parameter of ohmic contact electrodes rather than changing LED sizes. The first ohmic contact electrodes have a first area and the second ohmic contact electrodes have a second area, allowing adjustment of light output and current density through electrode area variation. This approach maintains uniform LED sizing while achieving the desired light output adjustment, thereby simplifying the manufacturing process.
3Reliability
If different driving currents are applied to LEDs, then the color balance can be achieved, but the activation process becomes complicated
Solution Approach 1:
The patent applies preliminary action by pre-configuring ohmic contact electrodes with different areas during the manufacturing process. The first ohmic contact electrodes are formed with a first area and the second ohmic contact electrodes are formed with a second area, which preliminarily establishes the current density distribution needed for color balance. This preliminary structuring eliminates the need for complex activation processes or post-manufacturing adjustments to achieve proper color balance.
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 electronic device achieves uniform light-emitting efficiencies across different LEDs, simplifying the manufacturing process and enabling white color balance by adjusting the size of the ohmic contact electrodes based on current density requirements.
Implementation Method 1
a first ohmic contact electrode disposed between the substrate and the first p-type semiconductor layer... a second ohmic contact electrode disposed between the substrate and the second p-type semiconductor layer
Implementation Method 2
a first light-emitting element disposed on the substrate and configured to emit a first light of a first color... a second light-emitting element disposed on the substrate and configured to emit a second light of a second color different from the first color
Data Source
AI summary
An electronic device is provided. The electronic device includes a substrate and a first light-emitting element disposed on the substrate and configured to emit a first light of a first color. The first light-emitting element includes a first p-type semiconductor layer and a first ohmic contact electrode disposed between the substrate and the first p-type semiconductor layer. The electronic device also includes a second light-emitting element disposed on the substrate and configured to emit a second light of a second color different from the first color. The second light-emitting element includes a second p-type semiconductor layer and a second ohmic contact electrode disposed between the substrate and the second p-type semiconductor layer. The area of the first ohmic contact electrode and the area of the second ohmic contact electrode are different.