Horizontal Line Driver Buffer Sizing for Curved Display Luminance
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Solution Overview
Problem
In display devices with curved edges, the difference in RC delays among various surface display areas causes non-uniform luminance due to varying lengths and widths of horizontal lines, leading to aesthetic and functional issues.
Innovation Solution
A horizontal line driver is designed with output buffers of varying sizes to match the length and width differences of scan and emission lines across different display areas, ensuring uniform signal delivery and minimizing RC delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display panel includes curved edges and side surface display areas with different widths, then the aesthetic appearance and convenience in use are improved, but the RC delay varies among different display areas causing luminance non-uniformity
Solution Approach 1:
The patent applies local quality by configuring different output buffer sizes in different display areas. Specifically, the first output buffer is configured for side surface display areas, the second output buffer for curved edge display areas, and the third output buffer for flat edge display areas. This local differentiation compensates for the varying RC delays caused by different line lengths in different geometric regions, thereby maintaining luminance uniformity across the entire display panel while preserving the aesthetic curved edge design.
Solution Approach 2:
The patent changes the parameter of output buffer size according to the display area location. By adjusting the buffer size parameter (first, second, or third output buffer) based on the geometric characteristics of each display area, the system compensates for RC delay variations. This parameter adaptation ensures that signal delivery timing is optimized for each specific region, preventing luminance non-uniformity while maintaining the desired curved edge shape.
2Adaptability or versatility
If horizontal lines have different lengths in different display areas, then the display can accommodate curved edges, but the RC delay difference causes non-uniform luminance
Solution Approach 1:
The patent implements local quality by assigning different output buffer configurations to different display areas based on their geometric characteristics. The first output buffer serves side surface areas, the second output buffer serves curved edge areas, and the third output buffer serves flat edge areas. This localized optimization ensures that each display area receives appropriately timed signals despite varying line lengths, maintaining signal delivery reliability across the entire panel.
Solution Approach 2:
The patent applies preliminary action by pre-configuring different output buffer sizes before signal transmission. The display driver circuit is designed with predetermined buffer configurations (first, second, or third output buffer) for different display areas, which proactively compensates for the known RC delay differences caused by varying horizontal line lengths. This preliminary configuration prevents luminance non-uniformity before it occurs, ensuring reliable signal delivery across all display areas.
Data Source
AI summary
A horizontal line driver providing a scan signal to scan lines, and including: first scan signal output blocks providing the scan signal to scan lines in a first side display area, wherein each of the first scan signal output blocks include a first output buffer; second scan signal output blocks providing the scan signal to scan lines in a first front display area including curved edges, wherein each of the second scan signal output blocks include a second output buffer; and third scan signal output blocks providing the scan signal to scan lines in a second front display area. Each of the third scan signal output blocks include a third output buffer. The width of the first front display area is larger than a width of the first side display area but is smaller than a width of the second front display area, and the width gradually increases.