Display Panel Azimuth Optimization for Reflectance
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Solution Overview
Problem
Existing display devices and vehicle rearview mirrors face reduced reflectance when a viewer looks at them from diagonally below, particularly in the reflective state, limiting their functionality and viewability.
Innovation Solution
The display device and vehicle rearview mirror incorporate a display panel with a second direction orthogonal to the first direction on its planar surface closer to parallel with the vertical direction, optimizing the azimuth for highest reflectance in the reflective state, achieved through a specific configuration of polarization members and an optical sheet, allowing for improved reflectance and transmittance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device uses a conventional display panel orientation, then the device structure is simple, but the reflectance is lowered when viewed from diagonally below
Solution Approach 1:
The patent applies asymmetry by configuring the display panel with a specific non-standard orientation where the second direction (orthogonal to the first direction) is closer to parallel with the vertical direction than the first direction. This asymmetric orientation optimizes the azimuth for highest reflectance to be at a lower side in the vertical direction and between the first and second directions, thereby improving reflectance when viewed from diagonally below while maintaining a relatively simple device structure.
2Illumination intensity
If the display panel is oriented to improve reflectance at diagonal viewing angles, then reflectance is improved, but the viewing angle and viewability in other directions may be compromised
Solution Approach 1:
The patent applies local quality by optimizing the display panel orientation specifically for diagonal viewing angles where reflectance is typically compromised. The specific orientation configuration targets the lower side azimuth between the first and second directions to achieve highest reflectance, while the overall device maintains functional adaptability for both reflective and transmissive states. This localized optimization for specific viewing conditions improves reflectance without completely sacrificing other viewing angles.
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 configuration enhances viewability both in the reflective and transmissive states, preventing reduction in reflectance when viewed diagonally, ensuring high performance as a display and mirror functionality.
Implementation Method 1
a reflective state in which incident light is reflected
Implementation Method 2
achieved through a specific configuration of polarization members and an optical sheet
Implementation Method 3
a transmissive state in which incident light is transmitted
Data Source
AI summary
A display device including optical sheet configured to transmit light linearly polarized in first polarization direction; first polarization member configured to absorb light linearly polarized in second polarization direction orthogonal to first polarization direction; front panel disposed between first polarization member and optical sheet, wherein optical sheet is disposed between front panel and display panel, and azimuth at which highest reflectance is obtained in reflective state in which incident light is reflected is azimuth at which highest transmittance is obtained in transmissive state in which incident light is transmitted.