Polarizer Refractive Layer Layout to Eliminate Under-Screen Camera Mura
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Solution Overview
Problem
Full screen display apparatuses using a camera-under-screen scheme suffer from the Mura phenomenon due to uneven brightness caused by linearly polarized light entering the polarizer with different polarization states after passing through glass with varying dust distributions, leading to undesirable image quality.
Innovation Solution
Incorporating a complex refractive layer configured to convert linearly polarized light into circularly polarized light, with a specific acute angle between its film-forming stretching direction and the display panel's horizontal direction, to ensure almost all circularly polarized light passes through the polarizer, thereby eliminating the Mura phenomenon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a camera-under-screen scheme is used to achieve full screen display, then the display area is increased, but the Mura phenomenon occurs due to uneven brightness caused by linearly polarized light with different polarization states passing through glass with varying dust distributions
Solution Approach 1:
A complex refractive layer is introduced as an intermediary component between the glass and the polarizer. This layer converts linearly polarized light into circularly polarized light, serving as a mediator that transforms the polarization state to eliminate the Mura phenomenon while maintaining full screen display functionality
Solution Approach 2:
The polarization state of light is changed from linear to circular by introducing the complex refractive layer. This parameter change in light polarization eliminates the sensitivity to dust distribution on glass surfaces, thereby resolving the Mura phenomenon while preserving the full screen display area
2Reliability
If a complex refractive layer is added to convert linearly polarized light into circularly polarized light, then the Mura phenomenon is eliminated, but the device structure becomes more complex
Solution Approach 1:
The complex refractive layer is designed to perform multiple functions: it converts linearly polarized light to circularly polarized light to eliminate the Mura phenomenon, while also serving as part of the display structure. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device 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
The solution effectively eliminates the Mura phenomenon by ensuring consistent light transmission and improved image quality, particularly in environments with varying dust distributions on glass surfaces.
Implementation Method 1
a complex refractive layer on a side of the polarizer facing away from the electroluminescent display panel; wherein the complex refractive layer is configured to convert linearly polarized light into circularly polarized light
Data Source
AI summary
The present disclosure provides a display apparatus. According to the present disclosure, a complex refractive layer is disposed on a side of the polarizer facing away from the electroluminescent display panel, and configured to convert the linearly polarized light into the circularly polarized light, so that the linearly polarized light in different polarization states having passed through the glass enters the complex refractive layer before entering the polarizer, the complex refractive layer converts the linearly polarized light into the circularly polarized light, and when the included angle between the film-forming stretching direction of the complex refractive layer and the first direction is an acute angle, almost all of the circularly polarized light can pass through the polarizer, thus eliminating the Mura phenomenon.