Display Panel Insulation Structure for Light Transmittance
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Solution Overview
Problem
Conventional TFT-LCD panels suffer from low light transmittance rates, typically ranging from 3% to 10%, leading to significant light loss and reduced brightness due to the divergent nature of backlight emissions and the flat, non-converging multi-layer film structures in array substrates.
Innovation Solution
The display panel incorporates an array substrate with a light inlet side and a light outlet side, featuring a plurality of opening and non-opening regions. An insulation structure with a first groove recessed from the light outlet side toward the light inlet side is filled with insulation materials, including a first and second insulation layer with different refractive indices, forming a prism structure that enhances light transmittance by total reflection and refraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional flat multi-layer film structures are used in array substrates, then the structure is simple and easy to manufacture, but light transmittance rate is low (3%-10%) causing significant light loss
Solution Approach 1:
The patent introduces a groove structure with curved surfaces into the array substrate's multi-layer film. The groove has a bottom surface and lateral surfaces that form curved optical paths, enabling total internal reflection of obliquely incident light back into the opening region. This curvature transforms the flat, non-converging structure into one that actively redirects light, resolving the contradiction between structural simplicity and light transmittance efficiency.
Solution Approach 2:
The patent modifies the refractive index parameter by filling the groove with insulation materials having different refractive indices from the surrounding layers. This creates refractive index differences that enable total internal reflection at the groove interfaces, significantly improving light redirection capability and transmittance rate while maintaining the overall structural simplicity of the array substrate.
2Illumination intensity
If conventional flat multi-layer film structures are used, then manufacturing is straightforward, but the structure cannot converge divergent backlight emissions reducing brightness
Solution Approach 1:
The groove structure with curved bottom and lateral surfaces acts as an optical converging element. The specific curvature geometry redirects divergent backlight emissions into more parallel paths, increasing the effective brightness without requiring complex external optical systems. This resolves the contradiction by integrating convergence function directly into the substrate structure.
Solution Approach 2:
The groove structure is nested within the existing multi-layer film structure of the array substrate, integrating the light-converging function into the conventional substrate architecture. This nesting approach adds convergence capability without requiring separate external optical components, thereby limiting the increase in overall device complexity while achieving brightness improvement.
3Loss of energy
If conventional flat structures are used, then light paths are straightforward, but obliquely incident light enters non-opening regions causing light waste
Solution Approach 1:
The curved lateral surfaces of the groove create total internal reflection for obliquely incident light, redirecting it back into the opening region rather than allowing it to enter non-opening regions. This curvature-based reflection mechanism significantly improves light utilization rate by recovering otherwise lost light paths while adding minimal structural complexity to the film stack.
Solution Approach 2:
The groove structure converts the harmful effect of oblique light incidence (which would normally cause light loss in non-opening regions) into a beneficial total internal reflection effect. By designing the groove with appropriate curvature and refractive index contrast, the structure causes oblique light to reflect back usefully rather than being wasted, transforming a problem into a solution.
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
This configuration significantly improves light transmittance rates and reduces light loss by redirecting obliquely incident light back into the opening regions and converging divergent backlight emissions, thereby enhancing the brightness of the display panel.
Implementation Method 1
The second insulation layer has a refractive index less than a refractive index of the first insulation layer... forming a prism structure that enhances light transmittance by total reflection and refraction
Implementation Method 2
The second insulation layer has a refractive index less than a refractive index of the first insulation layer... forming a prism structure that enhances light transmittance by total reflection and refraction
Data Source
AI summary
The present disclosure provides a display panel and a display device including the display panel. The display panel includes an array substrate including a light inlet side and a light outlet side oppositely arranged, including a plurality of opening regions for passing though light and a plurality of non-opening regions in addition to the plurality of opening regions, and including an insulation structure. The insulation structure includes a first groove located in the opening regions, recessed in a direction from the light outlet side toward the light inlet side, and filled with insulation materials. The insulation materials include a first insulation layer and a second insulation layer disposed on one side of the first insulation layer close to the light inlet side. The second insulation layer has a refractive index less than a refractive index of the first insulation layer.