Curved LCD Panel Sub-Pixel Area Ratio Adjustment
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Solution Overview
Problem
Curved TFT-LCD panels suffer from misalignment between the TFT substrate and the CF substrate during bending, leading to a dark region with low light transmittance and luminance inequality, which degrades image display quality.
Innovation Solution
The LCD panel incorporates a black matrix layer to adjust the area ratios of primary and secondary sub-pixels across different display sections, ensuring consistent brightness and reducing color shift by optimizing the area ratios and shapes of these sub-pixels, particularly using a black matrix layer to adjust the areas of the primary and secondary sub-pixels in each display section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the curved screen is bent to form the curved shape, then the image display quality is improved, but misalignment between TFT substrate and CF substrate occurs causing dark region
Solution Approach 1:
The screen is divided into multiple display sections (central display section, first display section, second display section) with different bending characteristics. Each section is further divided into pixel units with specifically designed sub-pixel arrangements. This segmentation allows different regions to be optimized independently for their specific bending conditions, addressing the alignment issue in each zone.
Solution Approach 2:
Different display sections have different area ratios of primary and secondary sub-pixels tailored to their local bending characteristics. The central display section has one configuration, while the first and second display sections have different configurations. This local optimization compensates for the misalignment caused by bending in each specific region.
2Shape
If the bending angle is increased to enhance curved screen effect, then the curvature is more pronounced, but misalignment and dark region become more obvious
Solution Approach 1:
The patent introduces a dynamic compensation mechanism where the sub-pixel area ratios are adjusted based on the bending angle and position. The first and second display sections have larger secondary sub-pixel areas to compensate for the increased misalignment that occurs at higher bending angles, allowing the screen to maintain image quality even with pronounced curvature.
3Illumination intensity
If the area of primary sub-pixel is increased to improve brightness, then the light transmittance is improved, but the area ratio balance with secondary sub-pixel is disrupted causing color shift
Solution Approach 1:
The patent systematically changes the area parameters of both primary and secondary sub-pixels across different display sections. By adjusting both parameters simultaneously and maintaining specific area ratios, the solution achieves optimal brightness while preventing color shift. The area ratios are carefully controlled to balance light output and color accuracy in each section.
Data Source
AI summary
An LCD panel applied to a curved screen includes display sections and a black matrix layer. The black matrix layer is used for adjusting an area of the primary sub-pixel and an area of the secondary sub-pixel in each of display section, so that an area ratio of the secondary sub-pixel to the primary sub-pixel in the first display section equals to an area ratio of the secondary sub-pixel to the primary sub-pixel in the central display section, an area ratio of the secondary sub-pixel to the primary sub-pixel in the second display section is greater than that of the secondary sub-pixel to the primary sub-pixel in the first display section, an area of the primary sub-pixel in the central display section is lower than that of the primary sub-pixel in the first display section. Therefore, brightness and quality of the curved screen on image display are improved.