LED Current Tuning for Peak Wavelength Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the manufacturing process of LEDs or micro LEDs, variations in peak wavelengths occur due to process variations, leading to chromatic aberration issues despite using the same current, which affects display quality.
Innovation Solution
An electronic detection system with tunable current source circuits, a detector, and a memory that stores lookup tables to adjust input currents based on captured feature values of photoelectric components, ensuring consistent peak emission wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same current is input to LEDs or micro LEDs produced in the same batch, then the manufacturing process is simple and efficient, but the peak wavelengths of the emitted lights differ due to process variations, causing chromatic aberration
Solution Approach 1:
The patent applies preliminary action by measuring the peak wavelength of each LED or micro LED during the manufacturing process and storing the measurement data in advance. Based on these pre-measured wavelengths, compensation currents are calculated and stored in lookup tables before the display device is put into service. This allows the system to pre-compensate for wavelength variations without requiring real-time measurement during operation, thus maintaining manufacturing efficiency while improving wavelength consistency.
Solution Approach 2:
The patent implements parameter changes by adjusting the input current parameters for each LED or micro LED based on its measured peak wavelength. Instead of using a uniform current for all components, the system varies the current parameters individually to compensate for wavelength deviations. This is achieved through lookup tables that map wavelength measurements to corresponding compensation currents, allowing the system to correct chromatic aberration while maintaining simple manufacturing processes.
2Manufacturing precision
If individual current adjustment is implemented for each photoelectric component to compensate for wavelength variations, then peak wavelength consistency is improved, but the device complexity increases due to multiple tunable current source circuits and lookup tables
Solution Approach 1:
The patent applies universality by using a single detector that can measure the peak wavelengths of multiple photoelectric components sequentially. The same detector hardware is reused for measuring different LEDs or micro LEDs, rather than dedicating a separate detector to each component. This reduces the overall number of measurement devices needed while still enabling individual wavelength characterization and compensation for each component.
Solution Approach 2:
The patent implements copying by creating lookup tables that store the relationship between measured wavelengths and compensation currents for each photoelectric component. Instead of implementing complex real-time calculation circuits, the system creates lookup tables (copies of the compensation data) that can be quickly referenced during operation. This approach simplifies the control logic while maintaining the ability to compensate for wavelength variations in each individual 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 system achieves wavelength compensation by aligning peak emission wavelengths across LEDs, addressing chromatic aberration and ensuring consistent color and brightness.
Implementation Method 1
the detector captures an overall image of the photoelectric components
Implementation Method 2
The Michelson interferometer is disposed between the detector and the electronic device. The functional analysis device is electrically connected to the detector and the Michelson interferometer. The lights emitted from the photoelectric components are processed by the Michelson interferometer and then absorbed by the detector
Data Source
AI summary
An electronic detection system includes an electronic device, a detector and a memory. The electronic device includes a circuit substrate, a plurality of photoelectric components, and a plurality of tunable current source circuits. Each photoelectric component has one or more peak emission wavelengths in response to a plurality of current values. The tunable current source circuits are disposed on the circuit substrate and electrically connected to the photoelectric components. The detector captures a feature value of a corresponding one of the photoelectric components. One or more lookup tables stored in the memory are based on the feature values and the current values of the photoelectric components. Each tunable current source circuit transmits an input current to a corresponding one of the photoelectric components in response to the lookup table(s) to perform a selected peak emission wavelength.