LED Display Polarization Layer for External Light Reflection Reduction
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Solution Overview
Problem
Light-emitting diode (LED) display apparatuses face a challenge in reducing the reflectance of external light on their substrates, which lowers the contrast ratio of displayed images due to the reflection of external light by LED elements and substrates.
Innovation Solution
The LED display apparatus incorporates a transmission layer on the substrate's front surface to cover LED elements, combined with first and second polarization members to maintain polarization of external light, preventing it from being reflected back and reducing overall reflectance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED elements are arranged on a substrate to form a display apparatus, then light emission and display functionality are achieved, but external light is reflected by the LED elements and substrate, reducing the contrast ratio of displayed images
Solution Approach 1:
A transmission layer is introduced as an intermediary component between the LED elements and the polarization members. This transmission layer allows polarized light to pass through while maintaining polarization, effectively mediating the interaction between the LED elements and the external light environment to reduce reflection and improve contrast ratio
Solution Approach 2:
The patent applies polarization members that change the polarization state of light passing through the display apparatus. By controlling the polarization parameters of external light and the reflected light, the system能够有效区分 and block reflected light while maintaining display visibility, thereby resolving the contradiction between display brightness and external light reflection
2Object-affected harmful factors
If a transmission layer is added to cover LED elements and maintain polarization, then reflectance of external light is reduced and contrast ratio is improved, but device structure becomes more complex
Solution Approach 1:
The transmission layer serves multiple functions simultaneously: it covers the LED elements, maintains light polarization, and allows light transmission. By combining multiple functions into a single component, the patent reduces the need for additional separate structures, thereby managing device complexity while achieving the desired optical performance
Solution Approach 2:
The patent employs composite optical structures consisting of the transmission layer combined with polarization members. This composite approach integrates multiple optical functions into a unified structure that manages complexity while effectively reducing external light reflection and improving contrast ratio
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 effectively blocks reflected external light, enhancing the contrast ratio of the displayed images by maintaining polarization and preventing external light from being reflected back, thereby improving image clarity.
Implementation Method 1
a first polarization member arranged in front of the transmission layer; and a second polarization member arranged on a front surface of the first polarization member and allowing external light to be incident thereon, wherein the transmission layer is provided such that polarization of external light polarized through the second polarization member and the first polarization member is maintained
Implementation Method 2
The transmission layer may include a light absorbing material. The transmission layer may have a black color. a low reflection portion arranged on a front surface of the second polarization member, and the low reflection portion is configured to guide external light to be incident on the second polarization member, and prevent the external light incident on the second polarization member and reflected by the front surface of the substrate or the plurality of LED elements from proceeding to an outside of the second polarization member
Implementation Method 3
a low reflection portion arranged on a front surface of the second polarization member, and the low reflection portion is configured to guide external light to be incident on the second polarization member
Data Source
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AI summary
Provided is a display apparatus including a substrate, a plurality of light emitting device (LED) elements arranged in front of the substrate, a transmission layer formed on a front surface of the substrate to entirely cover the plurality of LED elements, a first polarization member arranged in front of the transmission layer, and a second polarization member arranged on a front surface of the first polarization member and allowing external light to be incident thereon, wherein the transmission layer is provided such that polarization of external light polarized through the second polarization member and the first polarization member is maintained in a course of the polarized external light passing through the transmission layer, being reflected by the front surface of the substrate or the plurality of LED elements and being directed to the first polarization member.