Multi-Color Pixel Emission Control for Current Density Tuning
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Solution Overview
Problem
Existing light emitting elements, such as micro LEDs, require optimal adjustment of current density for efficient light generation, which is not adequately addressed in current technologies.
Innovation Solution
A pixel design with dual emission control transistors and separate emission control signal lines for each light emitting element, allowing independent adjustment of emission control signals to optimize driving characteristics and improve emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single emission control transistor is used for multiple light emitting elements, then device complexity is reduced, but emission efficiency cannot be optimized for each element
Solution Approach 1:
The patent divides the emission control function into separate transistors for each light emitting element. Specifically, it provides a first emission control transistor for a first light emitting element and a second emission control transistor for a second light emitting element, allowing independent control of current density for each element to optimize emission efficiency.
2Loss of energy
If separate emission control transistors are used for each light emitting element, then emission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing different emission control transistors with potentially different configurations for different light emitting elements. The first emission control transistor has a first channel width and the second emission control transistor has a second channel width, allowing each element to receive optimally tailored current control based on its specific characteristics.
3Device complexity
If current density is not adjusted for light emitting elements, then device complexity is reduced, but light output efficiency deteriorates
Solution Approach 1:
The patent changes the electrical parameters by adjusting the channel width of emission control transistors to control current density. By setting different channel widths for different emission control transistors, the patent optimizes the current density for each light emitting element, thereby improving light output efficiency while maintaining manageable device complexity.
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 proposed pixel structure enhances emission efficiency by allowing separate setting of emission control signals for each light emitting element, thereby improving overall light output.
Implementation Method 1
A light emitting element (for example, a micro LED) may generate light by receiving a current
Data Source
AI summary
A pixel includes a (1-1)-th emission control transistor including a first semiconductor pattern and a first emission control gate electrode overlapping a (1-1)-th emission control channel area of the first semiconductor pattern, a (2-1)-th emission control transistor including a second semiconductor pattern and a second emission control gate electrode overlapping a (2-1)-th emission control channel area of the second semiconductor pattern, a first emission control signal line configured to transmit a first emission control signal and connected to the first emission control gate electrode, a second emission control signal line configured to transmit a second emission control signal and connected to the second emission control gate electrode, a first light emitting element connected to the (1-1)-th emission control transistor and configured to emit light of a first color, and a second light emitting element connected to the (2-1)-th emission control transistor and emit light of a second color.