Heat Distribution Estimation for Image Display Units
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for estimating heat distribution in image display units, such as organic electroluminescence displays, fail to accurately account for heat dissipation factors, leading to discrepancies between estimated and actual heat distribution, particularly due to the influence of power source and signal processing circuits on the back surface.
Innovation Solution
A method and device that calculate average current values for pixel areas, convert them into heat generation data using a current-heat conversion coefficient, and update heat distribution tables by applying a two-dimensional low pass filter and heat dissipation coefficient, while also considering the impact of heat sources on the back surface through offset tables and temperature conversion coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If heat generation amount is calculated based only on current values without considering heat dissipation, then calculation simplicity is maintained, but heat distribution estimation accuracy deteriorates
Solution Approach 1:
The patent transforms the static heat distribution estimation into a dynamic model by introducing time-based heat dissipation coefficients. The heat distribution at each timing is calculated by combining heat generation with heat dissipation that occurs over time intervals, allowing the system to adapt to changing thermal conditions while maintaining a manageable calculation framework.
Solution Approach 2:
The patent introduces heat dissipation coefficients as variable parameters that change based on timing and thermal conditions. By multiplying heat generation amounts by these time-dependent coefficients, the system accounts for heat dissipation effects without requiring complex thermal field simulations, thus improving accuracy while preserving calculation efficiency.
2Device complexity
If heat dissipation factors are not considered in heat distribution calculation, then calculation process remains simple, but estimation accuracy deteriorates due to discrepancy with actual heat distribution
Solution Approach 1:
The patent pre-calculates and stores heat dissipation coefficients for different timing intervals before performing the actual heat distribution estimation. This preliminary preparation allows the main calculation process to remain simple by directly applying these pre-computed coefficients, while still capturing the complex heat dissipation behavior that improves estimation accuracy.
3Device complexity
If only pixel area heat generation is considered without back surface heat source influence, then calculation simplicity is maintained, but temperature distribution analysis accuracy deteriorates
Solution Approach 1:
The patent divides the heat source into distinct segments: pixel area heat generation and back surface heat source influence. Each segment is calculated separately using appropriate coefficients, and the results are combined to form the complete heat distribution picture. This segmentation allows the system to account for multiple heat sources without creating an intractably complex calculation model.
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 approach improves the accuracy of heat distribution estimation by incorporating heat dissipation and back-surface heat source influences, resulting in a more precise temperature distribution analysis for image display units.
Implementation Method 1
calculating heat generation amount data by multiplying the calculated average current value by a predetermined current-heat conversion coefficient
Implementation Method 2
The temperature of the image display unit varies depending on the heat generated with the operation of the pixel, or heat dissipation caused due to heat conduction
Data Source
AI summary
A method of estimating heat distribution of an image display unit includes: calculating, based on image data, an average current value of a pixel area in a display surface, the pixel area including at least one pixel in an image display unit, the image display unit including pixels arranged therein; calculating heat generation amount data by multiplying the calculated average current value by a predetermined current-heat conversion coefficient to convert the calculated average current value into a value corresponding to an amount of heat generation; and adding the heat generation amount data to a value of a first heat distribution table to update the first heat distribution table, and creating a new first heat distribution table by performing a two-dimensional low pass filter process on the updated table before multiplying a value of the processed table by a predetermined heat dissipation coefficient, at every predetermined period.