Black Display Insertion for OLED Burn-In Prevention
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Solution Overview
Problem
Conventional organic electroluminescent display devices in vehicles experience burning issues when displaying overlapping high-brightness images, such as speedometers and tachometers, due to the overlap of white image portions, leading to poor display quality and potential damage to the display panel.
Innovation Solution
A display method and device that arranges pixels in a matrix on a display panel, where light emitting elements are driven based on image data, and a black display portion is strategically placed over the overlapping high-brightness image areas to prevent burning, ensuring high-quality image display by covering the outline or entire high-brightness image portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different images are switchably displayed on the same display panel with overlapping portions, then display versatility and information density are improved, but burning occurs in overlapping high-brightness portions leading to display quality degradation
Solution Approach 1:
The patent applies local quality by making the background portion have different properties (black color) from the image portion. Specifically, the background portion is set to black to prevent burning in overlapping areas, while the image portion maintains its original high-brightness display. This localized differentiation resolves the contradiction by protecting vulnerable overlapping regions without compromising the overall display versatility.
Solution Approach 2:
The patent implements preliminary anti-action by proactively setting the background portion to black before switching between images. This preventive measure counteracts the potential burning effect that would occur in overlapping high-brightness portions, thereby maintaining display quality while allowing versatile image switching. The black background acts as a protective layer applied in advance to prevent harmful accumulation of light exposure.
2Productivity
If high-brightness images are displayed in overlapping portions, then information density and display efficiency are improved, but burning occurs causing element degradation and reduced device lifespan
Solution Approach 1:
The patent applies local quality by differentiating the background portion from the image portion in terms of brightness. The background portion is set to black (low brightness) specifically in regions where images may overlap, while the image portions maintain their high-brightness display. This localized approach allows efficient information display without causing burning in overlapping areas, thereby preserving element lifespan.
Solution Approach 2:
The patent converts the potential harm of high-brightness overlapping (which causes burning) into a benefit by using the black background portion as a protective mechanism. The black background, which might seem to reduce display brightness, actually serves to prevent element degradation by eliminating harmful light accumulation in overlapping regions, thus extending the display device's operational life.
3Device complexity
If the same display panel is used for multiple different images, then device complexity is reduced, but burning in overlapping portions degrades display quality
Solution Approach 1:
The patent applies local quality by setting the background portion to black specifically in overlapping regions, while maintaining normal display quality in non-overlapping areas. This localized modification allows a single display panel to handle multiple images without burning, reducing device complexity while preserving display quality through selective background rendering.
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
Prevents burning and maintains high-quality display when switching between different images, such as speedometers and tachometers, on the same panel, prolonging the life of electroluminescent elements and allowing customizable display designs according to user preference.
Implementation Method 1
light emitting elements of the pixels are driven on the basis of image data
Data Source
AI summary
A display method is performed by a display panel having a display area where a plurality of pixels are arranged in a matrix so as to correspond to intersections of a plurality of scanning lines and a plurality of data lines. The display method includes: driving light emitting elements of the pixels on the basis of image data; switching a plurality of different images to display the images on the display area such that portions of the images overlap each other; and putting a black display portion in a portion of the image after the switching which overlaps the image before the switching.