Display Module Light-Absorbing Layer for Pixel Cross-Talk Control
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Solution Overview
Problem
Display panels using self-luminescence elements suffer from cross-talk phenomena due to light emission from one sub pixel being guided to adjacent sub pixels, causing color mixing and reduced image clarity.
Innovation Solution
A display module design that incorporates a light absorption layer to absorb light emitted from the side and rear surfaces of self-luminescence elements, preventing it from being reflected to adjacent sub pixels, and uses a partition wall to reflect light towards the front surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If anisotropic conductive films are used for coupling between self-luminescence elements and TFTs, then mass-producibility is secured, but light from one sub pixel is guided to adjacent sub pixels causing cross-talk and color mixing
Solution Approach 1:
The patent converts the harmful stray light that causes cross-talk into a beneficial effect by introducing a light absorption layer that selectively absorbs light in specific directions. This layer transforms the problematic light guidance issue into a controlled light management solution, where the anisotropic conductive film's light-guiding property is harnessed for electrical coupling while the absorption layer prevents optical interference, thus converting the harmful cross-talk effect into a benefit of controlled light directionality
Solution Approach 2:
The patent introduces a light absorption layer as an intermediary element between the self-luminescence elements and the surrounding structure. This intermediary layer selectively absorbs light that would otherwise cause cross-talk, mediating between the electrical coupling requirement (achieved through anisotropic conductive films) and the optical isolation requirement, thereby resolving the contradiction between mass-producibility and cross-talk prevention
2Illumination intensity
If light is emitted from side and rear surfaces of self-luminescence elements, then light output is increased, but reflected light reaches adjacent sub pixels causing color mixing
Solution Approach 1:
The patent applies local quality by making the light absorption layer position-dependent and direction-dependent in its light absorption characteristics. The layer is strategically positioned to absorb light from specific directions (side and rear surfaces) while allowing light emission in the desired forward direction. This localized light absorption property enables the system to maintain high light output while preventing color mixing from reflected light
Solution Approach 2:
The patent utilizes color changes through the light absorption layer, which has selective optical absorption properties. The layer absorbs light in certain wavelengths and directions while allowing other wavelengths and directions to pass through, effectively managing the color purity by preventing the mixing of different color lights from adjacent sub pixels while maintaining the desired light output
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
Prevents cross-talk by effectively absorbing and redirecting light, enhancing image clarity and reducing color mixing, thereby improving display quality.
Implementation Method 1
incorporates a light absorption layer to absorb light emitted from the side and rear surfaces of self-luminescence elements, preventing it from being reflected to adjacent sub pixels
Implementation Method 2
uses a partition wall to reflect light towards the front surface
Data Source
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AI summary
A display module is provided. The display module includes a substrate, a conductive light absorption layer provided on a surface of the substrate, and a plurality of pixels electrically coupled to the substrate through the conductive light absorption layer. Each of the plurality of pixels may include a first self-luminescence element, a second self-luminescence element and a third self-luminescence element, each emitting light of a same color, a first color conversion layer corresponding to a light emitting surface of the first self-luminescence element and a second color conversion layer corresponding to a light emitting surface of the second self-luminescence element, and a first color filter corresponding to the first color conversion layer and a second color filter corresponding to the second color conversion layer.