Non-quadrangular Display Capacitance Equalization
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Solution Overview
Problem
Non-quadrangular displays, such as circular displays, face luminance deviations among pixels due to varying parasitic capacitance in data lines of different lengths, leading to inconsistent voltage transmission and luminance.
Innovation Solution
The implementation of a non-quadrangular display design featuring first signal lines and a DC voltage line in a peripheral area, with electrodes of varying areas corresponding to signal line lengths, and a layered structure with insulating layers to equalize capacitance across the display, ensuring consistent voltage distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If data lines are arranged parallel to one of the chords of the circular display unit, then the display can achieve a non-quadrangular shape, but the lengths of the data lines vary causing different numbers of pixels to be connected to each data line, resulting in luminance deviation among pixels
Solution Approach 1:
The patent applies local quality by configuring different numbers of pixels along different data lines according to their specific positions. The first data line has a first number of pixels while the second data line has a second number of pixels, allowing each data line to be optimized for its local characteristics rather than forcing uniform pixel distribution across all lines.
Solution Approach 2:
The patent changes the parameter of pixel count per data line to compensate for varying data line lengths. By adjusting the number of pixels connected to each data line based on its length and position, the patent equalizes the overall capacitance characteristics across all data lines, thereby resolving the luminance uniformity issue.
2Area of stationary object
If data lines of different lengths are used in a non-quadrangular display, then the display area can be expanded into non-traditional shapes, but parasitic capacitance of data lines varies, causing different voltage values to be transmitted to pixels and resulting in luminance inconsistency
Solution Approach 1:
The patent applies local quality by assigning different pixel counts to different data lines based on their specific lengths and positions within the display. This localized optimization ensures that each data line's capacitance characteristics are compensated according to its unique geometry, maintaining voltage consistency across the entire display area.
Solution Approach 2:
The patent changes the pixel count parameter for each data line to compensate for variations in data line length and parasitic capacitance. This parameter adjustment equalizes the electrical characteristics across all data lines, ensuring reliable and consistent voltage transmission to pixels throughout the expanded display area.
3Device complexity
If the same number of pixels are connected to each data line, then the display structure becomes simpler, but data lines of different lengths would require different numbers of pixels to compensate for capacitance differences, increasing structural complexity
Solution Approach 1:
The patent applies local quality by configuring different numbers of pixels along different data lines according to their specific positions and lengths. This localized differentiation resolves the luminance uniformity issue while maintaining a relatively simple overall structure that follows the natural geometry of the display.
Solution Approach 2:
Instead of making all data lines the same length (which would be complex), the patent inverts the approach by accepting different data line lengths and compensating through variable pixel counts. This inverted strategy simplifies the physical layout while achieving the desired electrical uniformity.
Data Source
AI summary
A non-quadrangular display is disclosed. In one aspect, the display includes a plurality of first signal lines formed in a non-quadrangular display area and a DC voltage line formed in a peripheral area surrounding the non-quadrangular display area. At least one of the first signal lines crosses the DC voltage line in the peripheral area.