Special-Shaped Display Panel Edge Brightness Tuning
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Solution Overview
Problem
Special-shaped display panels with non-rectangular display regions, such as circular or sector shapes, suffer from poor pixel uniformity at the edges, leading to rainbow stripes and poor display effects due to unequal pixel arrangements and color ratios.
Innovation Solution
The display panel design includes a special-shaped edge region with fewer pixels, where the drive signal potentials for these pixels are adjusted based on their distance from the edge, ensuring that the luminance brightness gradually decreases towards the edge, maintaining uniformity and avoiding rainbow stripes without altering the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pixels are arranged uniformly across the entire display region including edges, then pixel density is maximized, but display uniformity deteriorates due to rainbow stripes at special-shaped edges
Solution Approach 1:
The patent applies local quality by differentiating pixel drive signal potentials based on spatial location. Pixels in the special-shaped edge region receive different drive signal potentials compared to pixels in the main display region, with the potential varying according to the pixel's distance from the special-shaped edge. This local differentiation eliminates rainbow stripes while maintaining overall pixel density.
2Reliability
If aperture ratio is altered to compensate for edge pixel issues, then display uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The patent changes the electrical parameter (drive signal potential) rather than the geometric parameter (aperture ratio). By adjusting the drive signal potential based on pixel location and distance from the edge, the patent achieves display uniformity without modifying the physical aperture ratio or pixel structure, thereby avoiding increased manufacturing complexity.
3Reliability
If pixels in edge regions are reduced in number, then display uniformity improves by eliminating rainbow stripes, but pixel density decreases
Solution Approach 1:
The patent maintains pixel presence throughout the display region but applies local quality differentiation through position-dependent drive signal potentials. Pixels closer to the special-shaped edge receive different potentials than those farther away, achieving uniformity without removing pixels or reducing overall pixel density.
4Device complexity
If drive signal potentials are made uniform across all pixels, then circuit complexity is minimized, but display uniformity deteriorates at special-shaped edges
Solution Approach 1:
The patent introduces parameter variation in drive signal potentials based on pixel location. The potential is determined by the pixel's distance from the special-shaped edge, creating a gradient that compensates for edge effects. This parameter change achieves display uniformity while adding minimal circuit complexity through straightforward potential adjustment.
Data Source
AI summary
Provided is a display panel. The display panel includes a base substrate, a plurality of first pixels, and a plurality of second pixels. The base substrate is provided with a special-shaped display region, and the special-shaped display region includes a special-shaped edge region and a main display region which are sequentially arranged along the direction distal from the special-shaped edge. The first pixels are disposed in the main display region. The second pixels are disposed in the special-shaped edge region. In the case that the display panel displays a picture of a target gray level, the potentials of the drive signals transmitted to the light-emitting elements by the pixel circuits in the second pixels with different distances from the special-shaped edge are different and are smaller than the potentials of the drive signals transmitted to the light-emitting elements by the pixel circuits in the first pixels.