Display Panel Protrusions and Grooves for Wide Viewing Angle
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Solution Overview
Problem
LCD panels suffer from picture distortion beyond a certain viewing angle due to the directional light source, limiting their application in scenarios requiring ultra-wide viewing angles.
Innovation Solution
A display panel design featuring a first substrate, a second substrate with protrusions, a liquid crystal layer between the substrates, and an optical adjustment layer with grooves fitted with corresponding protrusions, where the refractive index of the second substrate is less than that of the optical adjustment layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LCD panel uses conventional flat substrate structure, then manufacturing is simple, but viewing angle is limited and picture distortion occurs beyond certain angle
Solution Approach 1:
The second substrate surface is segmented into multiple protrusions instead of a flat surface. Each protrusion acts as an independent optical element that redirects light at different angles, collectively providing ultra-wide viewing angle coverage while maintaining manufacturing feasibility through standardized protrusion patterns.
Solution Approach 2:
The optical adjustment layer is positioned locally at the second substrate away from the liquid crystal layer, creating a localized optical modification zone. This local quality change allows light refraction to occur only where needed, expanding viewing angles without requiring complete structural redesign of the entire panel.
2Adaptability or versatility
If optical adjustment layer with protrusions and grooves is added, then viewing angle is increased, but device complexity increases
Solution Approach 1:
The optical adjustment layer is merged with the second substrate structure, where the layer itself forms the protrusions and grooves rather than being a separate component. This integration reduces the number of discrete parts and simplifies assembly while maintaining the light refraction function for ultra-wide viewing angles.
Solution Approach 2:
The flat two-dimensional substrate surface is transformed into a three-dimensional structure with protrusions and grooves. This dimensional change adds optical functionality by creating light refraction surfaces at multiple heights and angles, expanding viewing capabilities without requiring additional lateral components.
3Adaptability or versatility
If refractive index of optical adjustment layer is increased, then light refraction is enhanced and viewing angle expands, but manufacturing precision requirements increase
Solution Approach 1:
The refractive index of the optical adjustment layer is changed to a higher value than the second substrate, creating the necessary optical contrast for effective light refraction. This parameter change enables the protrusions and grooves to function as light redirecting elements, expanding viewing angles while the specific refractive index value can be optimized during material selection to balance performance and manufacturability.
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 design increases the viewing angle by refracting light at the interface between the protrusions and grooves, reducing light leakage and improving display quality at wider angles.
Implementation Method 1
a refractive index of the second substrate is less than a refractive index of the optical adjustment layer... refracting light at the interface between the protrusions and grooves
Data Source
AI summary
A display panel and a display terminal are provided. The display panel includes a first substrate, a second substrate, a liquid crystal layer, and an optical adjustment layer. The second substrate is spaced apart from and opposite to the first substrate, and a plurality of protrusions are provided on the surface of the second substrate away from the first substrate. The liquid crystal layer is between the first substrate and the second substrate. The optical adjustment layer is provided on the side of the second substrate away from the first substrate, the optical adjustment layer is provided with a plurality of grooves, and the grooves are fitted with corresponding protrusions. A refractive index of the second substrate is smaller than a refractive index of the optical adjustment layer.