Brightness Compensation Device for Micro LED Panels
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Solution Overview
Problem
Micro LED panels experience brightness and chromaticity deviations from standard settings due to increased temperature, leading to color shift and darkening over time, especially in high-temperature situations or prolonged use.
Innovation Solution
A brightness compensation device comprising a panel with light emitting diodes, a heat detector, and a processor that adjusts the turn-on time and grayscale data of the luminous signal based on temperature data to maintain standard brightness and chromaticity values, using a memory to store commands and lookup tables for compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the panel is used in high temperature situations or for prolonged use, then the brightness and chromaticity deviate from standard values, but increasing temperature management complexity
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously receives temperature data from the heat detector, compares current grayscale data with stored compensation data corresponding to the detected temperature, and adjusts the luminous signal parameters accordingly. This closed-loop feedback system automatically compensates for temperature-induced brightness and chromaticity deviations without requiring complex manual temperature management, thereby maintaining reliability while controlling device complexity.
Solution Approach 2:
The patent changes the parameters of the luminous signal (grayscale data, turn-on time, duty cycle) based on detected temperature conditions. The processor adjusts these parameters dynamically by referencing pre-stored compensation data that maps temperature values to optimal signal parameters. This parameter adjustment approach directly counteracts temperature effects on brightness and chromaticity, resolving the contradiction between maintaining stability and managing complexity.
2Reliability
If the turn-on time of luminous signal is adjusted to compensate brightness, then the brightness stability improves, but the response time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation data for various temperature conditions in the memory device before actual operation. The compensation data, which includes adjusted grayscale values and turn-on time parameters, is prepared in advance and organized in a lookup table format. When temperature changes occur during operation, the processor simply retrieves the pre-computed compensation data corresponding to the current temperature, avoiding the need for real-time complex calculations. This approach maintains brightness stability while minimizing response time delays.
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 adjusts the brightness and chromaticity of the panel to maintain standard values even under varying temperatures, ensuring consistent performance over time and in high-temperature conditions.
Implementation Method 1
The heat detector is configured to receive a first temperature data and a second temperature data
Implementation Method 2
The panel comprises a plurality of light emitting diodes (LEDs)
Data Source
AI summary
A brightness compensation device includes a panel, a heat detector, a memory, and a processor. he processor is configured to perform the following steps: at a specific grayscale of the red grayscale data, the green grayscale data, or the blue grayscale data, adjusting a turn-on time data of a luminous signal according to the first temperature data; adjusting the red grayscale data, the green grayscale data, or the blue grayscale data according to a brightness relation or the sheet to obtain a red updating grayscale data, a green updating grayscale data, or a blue updating grayscale data; and when it is determined that the second temperature data is the same as the first temperature data, outputting or storing the red updating grayscale data, the green updating grayscale data, or the blue updating grayscale data.