Light Path Adjustment Film for Display Device Lattice Pattern Reduction
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Solution Overview
Problem
Display devices, particularly in virtual reality applications, face challenges in maintaining a clear image due to the recognition of lattice-like patterns and image blur caused by non-display regions in sub-pixels, which are difficult to reduce without degrading image quality.
Innovation Solution
A light path adjustment film is integrated onto the display panel, comprising a pattern layer with specific refractive indices and air gaps, which adjusts the light path from sub-pixels to output light effectively to both opening and non-opening regions, reducing the visibility of lattice-like patterns and maintaining image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the non-display regions of sub-pixels are reduced to minimize lattice-like patterns, then the lattice-like pattern visibility is reduced, but the image becomes unclear and blurred
Solution Approach 1:
A light path adjustment film is introduced as an intermediary component between the display panel and the viewer's eye. This film includes a pattern layer with light-transmissive portions aligned with opening regions and light-absorbing portions aligned with non-opening regions, which mediates the light output to fill in the lattice-like patterns while preserving image clarity through its specific refractive index and optical properties
2Reliability
If the non-display regions are reduced to improve display quality, then the lattice-like pattern is reduced, but image blur occurs
Solution Approach 1:
The light path adjustment film applies local quality differentiation through its pattern layer structure, where light-transmissive portions are positioned to correspond with opening regions and light-absorbing portions correspond with non-opening regions. This localized optical property variation allows selective light transmission and absorption to reduce lattice-like patterns while preserving the clarity of displayed image information
3Manufacturing precision
If a light path adjustment film is added to reduce lattice-like patterns, then image clarity is maintained, but device complexity increases
Solution Approach 1:
The light path adjustment film utilizes composite material structure combining a base film and a pattern layer with different optical properties. The pattern layer contains both light-transmissive and light-absorbing portions with specific refractive indices, creating a composite optical structure that achieves lattice-like pattern reduction and image clarity enhancement through the synergistic combination of different material properties
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 light path adjustment film enhances image clarity by ensuring light is output to both display and non-display regions, effectively reducing lattice-like patterns and preventing image blur, thereby improving display quality in virtual reality and other applications.
Implementation Method 1
a light path adjustment film on the display panel, which adjusts a light path from the sub-pixels
Implementation Method 2
a pattern layer with specific refractive indices and air gaps, which adjusts the light path from sub-pixels to output light effectively
Data Source
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AI summary
A display device includes a display panel including a plurality of pixels each having a plurality of sub-pixels; and a light path adjustment film on the display panel, wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film, wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the first patterns and having a second refractive index less than the first refractive index, and wherein the first pattern includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surface and the display panel, and a slanted surface connecting the top surface and the bottom surface.