Display Panel Film Layer Thickness Gradient for Camera Clarity
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Solution Overview
Problem
Current display technologies, such as those used in smartphones, suffer from image distortion due to diffraction caused by patterned film layers, which prevents true full-screen displays as external light passes through these layers, affecting camera performance and image clarity.
Innovation Solution
A display panel design with a substrate and multiple film layers of varying thickness and refractive indices at different locations, ensuring that the optical lengths of light paths deviate from integer multiples of the wavelength by a controlled deviation, minimizing phase differences and diffraction effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If patterned film layers are used in display panel, then device functionality is achieved, but diffraction occurs causing image distortion
Solution Approach 1:
The patent applies local quality by making the film layer thickness position-dependent. Specifically, the thickness of the film layer varies continuously across the display panel, with different regions having different thickness values. This gradient thickness distribution ensures that the optical path difference across different locations does not satisfy the diffraction condition, thereby eliminating diffraction patterns while maintaining the necessary display functionality throughout the panel.
Solution Approach 2:
The patent changes the physical parameter of film layer thickness from a uniform value to a position-dependent variable. By continuously varying the thickness parameter across the display panel surface, the optical properties of the film layer are modified locally, preventing the formation of coherent diffraction patterns while preserving the overall display function.
2Ease of manufacture
If uniform film layers are used, then manufacturing is simplified, but diffraction patterns occur due to consistent optical paths
Solution Approach 1:
The patent implements local quality by designing the film layer with spatially varying thickness. This approach requires more complex manufacturing processes compared to uniform films, but it successfully eliminates diffraction patterns by ensuring that optical paths differ across the display surface, preventing coherent interference.
3Measurement precision
If film layer thickness is varied to reduce diffraction, then image clarity improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by continuously varying the film layer thickness across the display panel. This approach achieves superior image clarity by eliminating diffraction patterns, but it necessitates more complex manufacturing techniques such as controlled vapor deposition or spin coating with gradient parameters, increasing production complexity.
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 design significantly reduces diffraction, enhancing image clarity and allowing for true full-screen displays by minimizing phase differences and diffraction, thereby improving camera performance and light collection efficiency.
Implementation Method 1
suffer from image distortion due to diffraction caused by patterned film layers
Implementation Method 2
n1, n2, ..., ni are film layer coefficients corresponding to the respective film layers arranged in the thickness direction of the display panel at the first location
Data Source
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AI summary
The present application provides a display panel having film layers with a patterned structure, wherein the display panel has at least a first location and a second location different from the first location, the first location and the second location meet preset conditions. Since the film layers arranged at the first location and at the second location meet this correspondence relationship, when light exits the display panel after going through the two paths, the phase difference thereof is small. Since a phase difference generated between light beams with the same initial phase position after passing through a display panel is one of the important reasons for occurrence of diffraction, in the technical solution of the present application, after light beams with the same initial phase position pass through the display panel via the two paths, the phase difference thereof is within a preset range such that the diffraction phenomenon caused by phase difference is alleviated, which improves the clarity of the image captured by a camera behind the display panel, and enables a photosensitive device behind the display panel to acquire clear and real images, thereby realizing full-screen display.