Optical Film Pattern Layers for Wider Display Viewing Angles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display modules and devices suffer from poor viewing effects at side viewing angles due to narrow viewing angles, which degrade the overall display performance.
Innovation Solution
A display module and device incorporating an optical film with alternating pattern layers of high and low refractive indices, featuring protrusions and recesses, and optionally including scatter particles with varying refractive indices, to enhance light scattering and improve side viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional display module is used, then the front viewing effect is good, but the side viewing angle effect deteriorates
Solution Approach 1:
The optical film is divided into multiple pattern layers (first pattern layer and second pattern layer) with different refractive indices, where each layer contains protrusions and recesses that segment the light path to achieve different optical effects at different viewing angles
Solution Approach 2:
Different regions of the optical film have different refractive indices and structural characteristics - the first pattern layer has higher refractive index for front viewing optimization, while the second pattern layer has lower refractive index for side viewing enhancement, creating local quality variations to address different viewing angle requirements
2Adaptability or versatility
If the viewing angle is increased, then the side viewing capability improves, but the overall display effect deteriorates
Solution Approach 1:
The optical film uses a composite structure combining materials with different refractive indices in alternating pattern layers, where the first pattern layer material has higher refractive index and the second pattern layer material has lower refractive index, creating a composite optical system that balances front and side viewing effects
3Illumination intensity
If scatter particles are added to the optical film, then light scattering increases, but the device complexity increases
Solution Approach 1:
The optical film incorporates scatter particles within its structure, creating a porous or composite material system where particles are distributed throughout the pattern layers to enhance light scattering without requiring a complete redesign of the optical film architecture
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 optical structure complexity is increased, enhancing light scattering and improving the display effect, particularly at side viewing angles, by diffusing light in multiple directions and reducing external light interference.
Implementation Method 1
enhancing light scattering and improving the display effect, particularly at side viewing angles, by diffusing light in multiple directions
Implementation Method 2
A refractive index of the first pattern layer is greater than a refractive index of the second pattern layer
Data Source
AI summary
Embodiments of the present disclosure are directed to a display module and a display device. The display module includes a display panel and an optical film arranged on a light-emitting side of the display panel. The optical film includes a first pattern layer and a second pattern layer disposed on a surface of the first pattern layer away from the display panel. The first pattern layer includes a plurality of first protrusions and a plurality of first recesses away from the display panel. The second pattern layer includes a plurality of second protrusions and a plurality of second recesses near first pattern layer. A refractive index of the first pattern layer is greater than a refractive index of the second pattern layer.