Spliced Display Device Scanning Direction Inversion
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Solution Overview
Problem
Large-sized display panels exhibit uneven brightness due to impedance issues in data lines, leading to differences in brightness between adjacent panels when spliced together, resulting in non-uniform brightness in display devices.
Innovation Solution
A spliced display device comprising at least two display panels with multiple display areas, where adjacent panels are scanned in opposite directions under control of a driver device, ensuring that when they receive the same grayscale voltage, a maximum or minimum brightness area is located between them, thereby minimizing brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display panels are spliced together to form large-sized displays, then the display area increases, but brightness uniformity deteriorates due to impedance differences in data lines
Solution Approach 1:
The patent applies reverse scanning directions for adjacent display panels. Specifically, panels are scanned in opposite directions (e.g., left-to-right for one panel, right-to-left for the adjacent panel) so that the data line impedance effects are inverted and cancel each other out at the boundary, achieving brightness uniformity across spliced panels.
Solution Approach 2:
The patent changes the scanning direction parameter for different display panels. By controlling the scanning direction to be opposite for adjacent panels, the electrical characteristics (voltage drops, impedance effects) are reversed, compensating for the brightness differences caused by data line impedance and achieving uniform brightness across the entire display.
2Area of stationary object
If data lines are extended to cover larger display areas, then the display size increases, but signal delay and impedance effects increase causing uneven brightness
Solution Approach 1:
The patent uses opposite scanning directions for adjacent panels to invert the signal transmission characteristics. This causes the impedance-induced voltage drops and signal delays to counterbalance each other at the panel boundaries, maintaining signal transmission quality and brightness uniformity even in large-sized displays.
Solution Approach 2:
The patent divides the large display into multiple segments (individual display panels) that are scanned in opposite directions. This segmentation allows each panel to have optimized data line routing and scanning sequences, reducing overall signal delay and impedance effects while maintaining large display area.
Data Source
AI summary
A spliced display device includes at least two display panels and a driver device configured to drive the display panels. Each of the display panels includes at least two display areas disposed side by side in a first direction. Any adjacent two of the display areas are configured to be scanned in directions facing each other or facing away from each other. The display device is provided with a maximum brightness area or a minimum brightness area located between the adjacent two of the display panels.