Display Panel Ladder-Like Border Pixel Units
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Solution Overview
Problem
Conventional display panels with curved borders fail to achieve a genuine curved shape due to the regular array of pixel units, resulting in undesirable display issues such as zigzag borders, which do not meet consumer demands for aesthetically designed round display devices like wearable watches.
Innovation Solution
A free-form display panel design where the border pixel units have smaller aperture region areas and electrode working regions compared to central pixel units, with tailored border aperture regions and electrode structures to form a ladder-like shape, allowing for a substantially round display region without affecting color or brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If pixel units are regularly arranged in an array to form a curved border, then the display panel can achieve a curved shape, but the pixel unit array presents a zigzag border instead of a genuine curved border
Solution Approach 1:
The patent applies local quality by differentiating the treatment of border pixel units from central pixel units. Specifically, the border pixel units have smaller aperture region areas and differently sized electrodes compared to central pixel units. This local differentiation allows the border pixels to be positioned more closely together, enabling a smoother curved border while maintaining overall display quality and color consistency across the display region.
2Ease of manufacture
If border pixel units have the same aperture region area as central pixel units, then manufacturing is simplified, but color and shape display quality of adjacent border pixel units deteriorates
Solution Approach 1:
The patent implements local quality by specifying that border pixel units have smaller aperture region areas compared to central pixel units. This local modification compensates for the reduced area of border pixels, ensuring that adjacent border pixel units display consistent color and shape without compromising overall manufacturing feasibility through standardized processes.
Solution Approach 2:
The patent applies parameter changes by adjusting the aperture region area and electrode dimensions of border pixel units differently from central pixel units. Specifically, the aperture ratio and electrode working region area are modified for border pixels to compensate for their smaller physical area, thereby maintaining uniform display characteristics across the entire display region while enabling curved border designs.
3Shape
If border pixel units have smaller area than central pixel units, then curved border design is enabled, but brightness consistency across the display region may be affected
Solution Approach 1:
The patent applies parameter changes by adjusting the electrode dimensions and aperture region area of border pixel units to compensate for their smaller physical area. Specifically, the electrodes in border pixel units are designed with optimized working region areas that are proportional to their smaller pixel area, ensuring that the light output and brightness remain consistent with central pixel units despite the reduced size, thereby maintaining brightness uniformity across the entire display region.
Data Source
AI summary
A display panel is disclosed, having a display region and a non-display region out of the display region, wherein the display region comprises a central pixel region and a border pixel region disposed between the central pixel region and the non-display region, the display panel comprising: a first substrate; a second substrate; a display medium layer; a plurality of central pixel units located at the central pixel region and having a plurality of first electrodes disposed on the second substrate; and a plurality of border pixel units located at the border pixel region and having a plurality of second electrodes disposed on the second substrate; wherein outmost edges of a part of the adjacent border pixel units form a ladder-like shape, and a light output area of at least one of the border pixel units is smaller than that of at least one of the central pixel units.