Display Panel Light-Absorbing Layer Layout for Low Reflectivity
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Solution Overview
Problem
Current LED display panels suffer from high reflectivity due to metal layers in the drive backplane, leading to poor display effects. To mitigate this, black films are used to absorb ambient light, but they have low transmittance, resulting in increased power consumption to maintain display brightness.
Innovation Solution
A display panel design that includes a substrate, a first metal drive layer with conductive pads, a light-absorbing layer that overlaps with the drive layer, and light-emitting units connected through vias. This configuration reduces reflectivity by absorbing ambient light and improves transmittance of an auxiliary light-absorbing layer, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-absorbing layer is added to reduce reflectivity, then display quality improves, but power consumption increases due to low transmittance
Solution Approach 1:
The light-absorbing layer is segmented into multiple layers with different optical properties. The first light-absorbing layer has high light absorption and low transmittance to reduce reflectivity, while the second light-absorbing layer has low light absorption and high transmittance to reduce power consumption. This segmentation allows each layer to perform its specific function optimally.
Solution Approach 2:
Different regions of the light-absorbing structure have different optical properties tailored to local requirements. The first light-absorbing layer is positioned where maximum light absorption is needed to counteract metal layer reflectivity, while the second light-absorbing layer is positioned where high transmittance is needed to allow light from light-emitting units to pass through efficiently.
2Object-generated harmful factors
If black films are used to absorb ambient light, then reflectivity decreases, but transmittance decreases leading to higher power consumption
Solution Approach 1:
The single black film is segmented into two distinct light-absorbing layers with different optical characteristics. The first layer (with carbon particles) provides strong light absorption to reduce reflectivity, while the second layer provides high transmittance to maintain display brightness, eliminating the need to compromise between these conflicting requirements.
Solution Approach 2:
The light-absorbing structure uses composite materials with different optical properties. The first light-absorbing layer contains carbon particles for high absorption, while the second light-absorbing layer is designed for high transmittance. This composite approach allows the system to simultaneously achieve low reflectivity and high transmittance.
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 proposed design effectively reduces the reflectivity of the display panel, enhances the transmittance of the auxiliary light-absorbing layer, and decreases power consumption while maintaining high display brightness.
Implementation Method 1
a light-absorbing layer on a side, facing away from the substrate, of the first metal drive layer
Implementation Method 2
an auxiliary light-absorbing layer on a side, facing away from the substrate, of the plurality of light-emitting units
Implementation Method 3
a light-reflecting layer between the substrate and the light-absorbing layer
Data Source
AI summary
Provided is a display panel. The display panel includes: a substrate; a first metal drive layer on a side of the substrate, wherein a plurality of conductive pads are arranged on the first metal drive layer; a light-absorbing layer on a side of the first metal drive layer, wherein an orthographic projection of the light-absorbing layer on the substrate is overlapped with an orthographic projection of the first metal drive layer on the substrate, and a plurality of first vias corresponding to the plurality of conductive pads are defined in the light-absorbing layer; a plurality of light-emitting units on a side of the light-absorbing layer, wherein the plurality of light-emitting units are electrically connected to at least part of the plurality of conductive pads through the plurality of first vias; and an auxiliary light-absorbing layer on a side of the plurality of light-emitting units.