Micro LED Display Panel Shading Layer for Light Interference
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Solution Overview
Problem
Current display panels face issues due to varying luminous efficiencies and light interference between pixels, which affect image quality and color accuracy.
Innovation Solution
A Micro LED display panel design featuring a substrate with pixel zones containing LEDs of different sizes, where the first color LED has a larger light-emitting surface than the second and third color LEDs, and a shading layer that partially covers the first light-emitting surface to reduce interference and enhance luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If sub-pixels with different colors are configured to emit lights, then the display panel can provide vivid display images, but sub-pixels with different colors have different luminous efficiencies which affect light-mixing effects
Solution Approach 1:
The patent applies local quality by making the first light-emitting surface (red LED) larger than the second light-emitting surface (green LED) to compensate for the lower luminous efficiency of red LEDs. This localized size adjustment ensures that each color contributes equally to the overall luminance, resolving the contradiction between different luminous efficiencies and consistent light-mixing effects across different colored sub-pixels.
2Ease of operation
If light emitted by each pixel diverges in all directions, then pixels can be driven independently, but adjacent pixels easily affect each other causing light interference
Solution Approach 1:
The patent extracts the harmful divergent light from adjacent pixels by introducing a shading layer that blocks light emitted in unwanted directions. This allows pixels to maintain independent driving capability while removing the harmful effect of light interference between adjacent pixels, resolving the contradiction between ease of operation and reduction of harmful factors.
Solution Approach 2:
The shading layer acts as an intermediary element between adjacent pixels, selectively blocking divergent light from reaching neighboring pixels while allowing light from the intended viewing direction to pass through. This mediator resolves the contradiction by enabling independent pixel operation without the harmful side effect of cross-pixel interference.
3Illumination intensity
If the area of the first light-emitting surface is made larger to compensate for lower luminous efficiency, then luminous efficiency is improved, but light interference with adjacent pixels increases
Solution Approach 1:
The patent applies local quality by differentiating the size of light-emitting surfaces based on color-specific luminous efficiency requirements. The first light-emitting surface (red) is made larger to compensate for lower efficiency, while the second light-emitting surface (green) is smaller. This localized size variation resolves the luminous efficiency contradiction while the shading layer manages the associated light interference.
Solution Approach 2:
The shading layer serves as an intermediary that allows the first light-emitting surface to be larger for improved luminous efficiency while preventing the resulting increased light interference. The shading layer selectively blocks excess divergent light from the larger surface, resolving the contradiction between luminous efficiency improvement and light interference reduction.
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 improves luminous efficiency and reduces light interference between adjacent pixels, resulting in improved image clarity and color balance.
Implementation Method 1
Each sub-pixel can emit lights in different colors... Each sub-pixel can be separately driven to emit said lights of a predetermined intensity
Implementation Method 2
The shading layer is disposed in the pixel zones, and the shading layer covers part of the first light-emitting surfaces... reduce interference and enhance luminance
Data Source
AI summary
A display panel comprises a first substrate and a shading layer. The first substrate comprises a plurality of pixel zones arranging in an array form. Each of the pixel zones comprises a first color LED and a second color LED. The first color LED comprise a first light-emitting surface in a display direction. The second color LED comprise a second light-emitting surface in the display direction. An area of the first light-emitting surface is larger than an area of the second light-emitting surface. The shading layer is disposed in the plurality of pixel zones, and the shading layer overlaps some of the first light-emitting surfaces at the display direction.