Display Panel Grid Line Positioning for Color Cast Reduction
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Solution Overview
Problem
Existing display panels suffer from color cast issues, particularly at large viewing angles, which negatively impact user experience due to differences in luminous intensity between sub-pixels.
Innovation Solution
A display panel design featuring a light blocking structure with grid-shaped grid lines that adjusts distances between sub-pixels and grid lines to equalize luminous intensity visibility at oblique angles, ensuring the blocking degree varies based on sub-pixel intensity, thereby alleviating color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If sub-pixels with different luminous intensities are used in the display panel, then the display can achieve broader color gamut and better image quality, but color cast occurs at large viewing angles due to unequal luminous intensity distribution
Solution Approach 1:
The patent applies local quality by making different parts of the display panel have different light blocking characteristics. Specifically, different sub-pixels (first, second, and third sub-pixels with different luminous intensities) are positioned at different distances from the grid lines of the light blocking structure. This local differentiation in positioning compensates for the inherent luminous intensity differences among sub-pixels, ensuring that at large viewing angles, the combined effect of luminous intensity and light blocking results in equalized overall light output across all sub-pixels, thereby eliminating color cast while maintaining the benefits of varied sub-pixel intensities for color gamut.
2Ease of manufacture
If a light blocking structure with grid lines is introduced to equalize sub-pixel visibility, then color cast is reduced at oblique angles, but the device complexity and manufacturing precision requirements increase
Solution Approach 1:
The patent applies universality by designing the light blocking structure to serve multiple functions simultaneously. The grid-shaped light blocking structure not only blocks light to equalize sub-pixel visibility at oblique angles but also serves as a structural framework that defines the spatial relationships among different sub-pixels. By integrating the light blocking function with the structural organization function, the patent reduces the need for separate components, thereby managing device complexity while achieving color cast elimination.
Solution Approach 2:
The patent applies asymmetry by intentionally creating asymmetric positioning of different sub-pixels relative to the grid lines of the light blocking structure. Rather than symmetrically arranging all sub-pixels at equal distances from grid lines, the patent positions first, second, and third sub-pixels at different asymmetric distances based on their respective luminous intensities. This asymmetric arrangement is crucial for compensating for luminous intensity differences and achieving equalized overall light output at large viewing angles.
3Ease of manufacture
If sub-pixels are positioned at different distances from grid lines to compensate for luminous intensity differences, then color cast is eliminated, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing the asymmetric positioning relationships between sub-pixels and grid lines during the design and manufacturing process. Rather than attempting to adjust positioning dynamically or rely on post-manufacturing calibration, the patent incorporates the precise distance specifications directly into the manufacturing process. The grid structure serves as a pre-defined reference framework that guides the placement of sub-pixels at specific distances, thereby achieving the required manufacturing precision through proactive design rather than reactive adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively relieves or eliminates color cast at large viewing angles by optimizing the blocking degree of the grid line for each sub-pixel, ensuring equalized luminous intensity and improved display quality.
Implementation Method 1
at least part of the grid line blocks light
Data Source
AI summary
Provided are a display panel and a display device. The display panel is configured such that a first luminous intensity of a first sub-pixel is greater than a second luminous intensity of a second sub-pixel at a same driving current. A light blocking structure includes a grid-shaped grid line, the shortest distance between a first orthographic projection of a first sub-pixel onto a substrate and a third orthographic projection of the grid line onto the substrate is D1H along the row direction of an array, the shortest distance between a second orthographic projection of a second sub-pixel onto the substrate and the third orthographic projection of the grid line onto the substrate is D2H along the row direction of the array, where D1H<D2H.