Non-Rectangular Display Panel Boundary Pixel Color Balance
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Solution Overview
Problem
In display devices with non-rectangular display areas, boundary pixels have different effective display areas compared to non-boundary pixels, leading to color imbalance and defective coloring during white color displays, which deteriorates the display quality.
Innovation Solution
A display device with a non-rectangular display area includes a driving unit that supplies gray level signals to subpixels based on the ratio of effective areas of non-boundary pixels to boundary pixels, ensuring color balance by adjusting the brightness of subpixels in boundary and non-boundary pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gray level signals are supplied uniformly to all subpixels regardless of position, then the driving unit operation is simple, but boundary pixels exhibit color imbalance and defective coloring
Solution Approach 1:
The patent applies local quality by differentiating the treatment of boundary pixels from non-boundary pixels. Specifically, boundary pixels are identified and assigned corrected gamma correction values based on their position, while non-boundary pixels use standard gamma correction values. This localized differentiation ensures that only the affected boundary regions receive special treatment, maintaining overall system simplicity while improving display quality at critical locations.
Solution Approach 2:
The patent implements parameter changes by modifying the gamma correction values specifically for boundary pixels. The driving unit adjusts the gray level signals by applying corrected gamma correction values to boundary pixels, which compensates for the reduced effective display area. This parameter adjustment resolves the color imbalance without requiring hardware modifications or complex structural changes.
2Adaptability or versatility
If the display area uses a non-rectangular shape, then the device adapts to various form factors, but boundary pixels have different effective areas causing color imbalance
Solution Approach 1:
The patent addresses the color balance issue in non-rectangular displays by applying local quality correction. Boundary pixels, which have reduced effective display areas due to the non-rectangular shape, are identified and assigned corrected gamma correction values. This localized correction maintains the adaptable non-rectangular form factor while compensating for the positional variations in effective area, ensuring uniform color balance across the entire display.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing corrected gamma correction values for boundary pixels before actual display operation. The driving unit retrieves and applies these pre-computed correction values during normal operation, eliminating the need for real-time calculations. This approach maintains both the flexible non-rectangular shape and precise color balance without adding computational overhead during display rendering.
3Reliability
If boundary pixels are corrected for effective area differences, then color balance is improved, but the driving unit complexity increases
Solution Approach 1:
The patent minimizes driving unit complexity by applying local quality correction only to boundary pixels. The driving unit includes a simple boundary pixel identification mechanism and a correction value application module that operates selectively. This localized approach improves color balance without requiring a complete redesign of the driving unit architecture, maintaining operational simplicity while achieving the correction goal.
Solution Approach 2:
The patent reduces driving unit complexity through preliminary action by pre-computing corrected gamma correction values for all boundary pixels during manufacturing or initialization. These correction values are stored in memory and retrieved during normal operation without requiring complex real-time calculations. This approach improves color balance while keeping the driving unit structure simple and computationally efficient.
Data Source
AI summary
A display device includes a non-rectangular display panel with an array of pixels, each pixel includes subpixels corresponding to at least three different colors, respectively, a driver that supplies gray level signals to the display panel, and a plurality of data lines that supply the gray level signals to the subpixels, respectively. A display-contributing effective area of one of the subpixels of one of the colors in boundary pixels is different from a display-contributing effective area of one of the subpixels of one of the colors in non-boundary pixels. The driver supplies the gray level signals for the respective subpixels to the data lines based on a ratio of the display-contributing effective area of the subpixels in the non-boundary pixels to the display-contributing effective area of the subpixels in the boundary pixels.