Display Panel Luminance Control via Localized Image Load Analysis
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Solution Overview
Problem
Organic light emitting display devices face increased power consumption and heat generation when displaying high-brightness images, as large currents are applied to specific regions of the pixel portion, leading to performance degradation.
Innovation Solution
A display device and method that divides the display panel into unit areas, calculates full and peripheral image loads, and adjusts image data luminance using global and local scaling factors to reduce power consumption and prevent heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large amount of current is applied to pixels in a specific region to display high-brightness images, then the luminance and brightness are improved, but the power consumption increases and heat generation occurs
Solution Approach 1:
The patent applies different maximum luminance values to different regions of the display panel. Specifically, pixels in a first region (e.g., center region) are assigned a first maximum luminance value, while pixels in a second region (e.g., peripheral region) are assigned a second maximum luminance value that is lower than the first. This local differentiation allows high brightness where needed while reducing power consumption in less critical areas.
2Illumination intensity
If a large amount of current is applied to pixels in a specific region to display high-brightness images, then the luminance is improved, but heat generation occurs leading to performance degradation
Solution Approach 1:
By assigning different maximum luminance values to different regions, the patent locally controls heat generation. Regions with lower maximum luminance values generate less heat, preventing thermal accumulation and performance degradation while maintaining adequate brightness in those areas.
3Use of energy by moving object
If the maximum current flowing through the pixel is limited to maintain the maximum current less than a predetermined threshold, then the power consumption is reduced, but the luminance in specific regions is degraded
Solution Approach 1:
Instead of applying a uniform current limit across the entire display panel, the patent implements region-specific maximum luminance values. This allows pixels in different regions to operate at different current levels appropriate to their luminance requirements, maintaining adequate brightness in high-luminance regions while reducing power consumption in peripheral regions.
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 reduces power consumption and prevents heat generation by optimizing luminance across the display panel, ensuring efficient operation and maintaining performance.
Implementation Method 1
The organic light emitting display device may display an image using an organic light emitting diode that generates light by recombination of electrons and holes
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, an image data corrector configured to generate a corrected image data by adjusting an image data and a data driver providing data signals to the plurality of pixels based on the corrected image data. The image data corrector divides the display panel into a plurality of unit areas, and adjust the image data for a unit area among the plurality of unit areas by using a full image load for the entire display panel, a first image load for the unit area, and a second image load for peripheral unit areas surrounding the unit area among the plurality of unit areas.