Display Panel Substrate Concave Interface Light Redirection
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Solution Overview
Problem
The light transmittance performance of TFT-LCDs is limited, with only 3% to 10% of light intensity being maintained after passing through the display panel, resulting in significant light loss due to absorption by opaque film materials in non-opening regions.
Innovation Solution
A display panel design featuring a substrate with a multi-layer structure, including a first base layer, a second base layer with a higher refractive index, and a third base layer with a lower refractive index. The interfaces between these layers form concave surfaces in the non-opening regions, refracting incident light towards the opening regions, thereby improving light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If opaque film materials are used in non-opening regions to block light, then light absorption is improved, but light efficiency is reduced
Solution Approach 1:
The patent converts the harmful effect of light absorption in non-opening regions into a beneficial effect by using the opaque film as a light-guiding structure. The light absorbed in the non-opening region is redirected through total internal reflection and refraction at the concave interface to enter the opening region, transforming waste light into useful light that contributes to display brightness.
Solution Approach 2:
The patent introduces a concave surface at the interface between layers with different refractive indices in the non-opening region. This curved interface structure enables total internal reflection and refraction of light, redirecting light from non-opening regions into opening regions, thereby improving overall light utilization efficiency.
2Illumination intensity
If light transmittance is improved to increase brightness, then power consumption is reduced, but light efficiency remains low due to absorption in non-opening regions
Solution Approach 1:
The patent addresses the light efficiency problem by converting the light-trapping effect in non-opening regions into a light-redirection mechanism. The concave interface structure guides light from non-opening regions into opening regions, ensuring that light energy is not wasted but instead contributes to the overall brightness of the display panel.
Solution Approach 2:
The patent applies different optical properties to different regions of the display panel. The non-opening regions are designed with a concave interface structure that has specific refraction and reflection properties, while the opening regions maintain their light-transmitting function. This local differentiation optimizes light utilization across the entire panel.
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 solution enhances light efficiency and optical performance by refracting light from non-opening regions into opening regions, effectively increasing the utilization of light and improving the brightness of the display panel.
Implementation Method 1
a refractive index of the second base layer is greater than a refractive index of the first base layer... a refractive index of the third base layer is less than a refractive index of the second base layer... at least one of the first interface or the second interface forms a first concave surface in the non-opening region
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a non-opening region and opening regions. The display panel includes a substrate. The substrate is located on a side of the display panel away from a light-exiting surface. The substrate includes a first base layer, a second base layer, and a third base layer. A first interface is formed between the second base layer and the first base layer. A second interface is formed between the third base layer and the second base layer.