Display Drive Controller Heat Prediction and Compensation
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Solution Overview
Problem
Existing display devices struggle to accurately predict and manage heat emission characteristics, which can lead to image quality degradation and transistor deterioration due to heat.
Innovation Solution
A drive controller and method for driving a display device that includes a heat emitting control unit. This unit sets average and diffusion regions based on image signals, extracts average gray levels, and generates a look-up table map to predict heat emission from the display panel, allowing for compensation of image data to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat emission is not predicted and compensated, then device simplicity is maintained, but image quality degrades and transistor deterioration occurs
Solution Approach 1:
The patent applies preliminary action by predicting heat emission characteristics before they cause damage. The drive controller calculates expected temperature increases based on grayscale values and duty cycles, and pre-compensates image data by adjusting pixel drive signals to account for anticipated heat effects. This prevents image quality degradation and transistor deterioration before they occur.
Solution Approach 2:
The patent uses copying by creating a virtual thermal model that replicates heat emission patterns. Instead of physically measuring temperature at every pixel, the system generates a copied representation of thermal characteristics through calculations based on grayscale values and duty cycles. This virtual model is then used to compensate image data without requiring complex physical sensing infrastructure.
2Duration of action of stationary object
If heat emission prediction is implemented, then transistor lifespan is extended, but computational complexity increases
Solution Approach 1:
The system performs preliminary calculations of temperature increase based on grayscale values and duty cycles before driving the display. By predicting thermal effects in advance and pre-adjusting pixel signals, the system extends transistor lifespan through proactive thermal management without requiring complex real-time temperature sensing and adjustment mechanisms.
Solution Approach 2:
The patent applies parameter changes by using grayscale values and duty cycles as input parameters to predict temperature increases. The system transforms these parameters through calculation to determine compensation values, which are then applied to adjust pixel drive signals. This approach manages thermal effects through mathematical parameter transformation rather than complex physical intervention.
3Reliability
If regional heat compensation is applied, then image quality is improved, but processing time increases
Solution Approach 1:
The patent applies segmentation by dividing the display into multiple regions and calculating heat emission characteristics separately for each region. The drive controller processes pixels in groups, applying region-specific compensation based on local grayscale distributions and duty cycles. This segmented approach improves image quality by accounting for spatial variations in heat generation while reducing overall processing complexity compared to pixel-by-pixel analysis.
Solution Approach 2:
The system implements partial action by applying heat compensation selectively to regions that require it, based on their grayscale values and duty cycles. Rather than uniformly processing all pixels with the same level of detail, the system focuses computational resources on areas with higher thermal risk, optimizing the balance between image quality improvement and processing time.
Data Source
AI summary
A display device includes: a display panel displaying an image; and a drive controller receiving an image signal, and driving the plurality of pixels, and including a heat emitting controller, wherein the heat emitting controller includes: an average region setter receiving the image signal, setting, to one pixel region, some pixels of the plurality of pixels, and extracting an average gray level, based on gray levels of the some pixels of the plurality of pixels to set an average region from the pixel region; a diffusion region setter substituting a diffusion region, which is set to have a temperature corresponding to the average gray level, into the average region; and a look-up table map generator generating a look-up table map by predicting, based on the diffusion region, heat emitted from an inner part of a display region of the display panel and varied depending on the image.