Transparent Substrate Light Shielding Region Design
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Solution Overview
Problem
Display devices require high designability and functionality, particularly in the front plate, where a transparent substrate with a light shielding region needs to incorporate both infrared transmission and non-transmission regions without a visually noticeable boundary between them.
Innovation Solution
A transparent substrate with a light shielding region is designed, featuring a first light shielding region with 0.1 to 40% luminous transmittance and 65% average transmittance at 800 to 1,000 nm, and a second light shielding region with an optical density of 4 or more and 1.5 times higher average reflectance at 600 to 700 nm compared to 400 to 600 nm, to ensure seamless integration and effective light shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different materials are used for infrared transmission and non-transmission regions, then infrared ray transmission is enabled, but a conspicuous boundary is formed
Solution Approach 1:
The patent applies local quality by creating a first light shielding region with specific optical properties (luminous transmittance 0.1 to 40%, average transmittance at 800-1000 nm of 65% or more) that differs from the second light shielding region (optical density 4 or more). This localized differentiation enables infrared transmission in the first region while maintaining visual uniformity, as the boundary becomes inconspicuous due to the carefully controlled optical properties.
Solution Approach 2:
The patent utilizes parameter changes by precisely controlling the optical properties of the first light shielding region, specifically setting its luminous transmittance between 0.1 to 40% and average transmittance at infrared wavelengths (800-1000 nm) at 65% or more. These parameter adjustments allow the region to transmit infrared rays while maintaining visual continuity with adjacent regions, making the boundary inconspicuous.
2Object-affected harmful factors
If a light shielding region is added to the front plate, then light shielding performance is improved, but designability is reduced
Solution Approach 1:
The patent applies local quality by dividing the light shielding region into two distinct zones with different optical characteristics. The first light shielding region provides infrared transmission capability while the second light shielding region provides strong visible light shielding (optical density 4 or more). This localized functional differentiation achieves comprehensive light shielding performance while maintaining aesthetic designability through the inconspicuous boundary between regions.
Solution Approach 2:
The patent employs composite materials or composite structures by combining regions with different optical properties within a single transparent substrate. The first light shielding region (with specific transmittance properties) and the second light shielding region (with high optical density) are integrated into one substrate, creating a composite structure that simultaneously achieves light shielding performance and designability.
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 allows for a display device with enhanced designability by making the boundary between the infrared transmission and non-transmission regions unclear, thereby improving sensor sensitivity and preventing light leakage, while maintaining sufficient light shielding performance.
Implementation Method 1
an average transmittance at a wavelength of 800 to 1,000 nm of 65% or more
Implementation Method 2
the second light shielding region has an optical density of 4 or more
Implementation Method 3
the second light shielding region has a luminous reflectance of 0.1 to 1 and an average reflectance R1 at a wavelength of 600 to 700 nm being 1.5 times or more of an average reflectance R2 at a wavelength of 400 to 600 nm
Data Source
AI summary
A transparent substrate with a light shielding region includes a transparent substrate, and a light shielding region on a peripheral portion of one main surface of the transparent substrate. The light shielding region includes a first light shielding region and a second light shielding region. The first light shielding region has a luminous transmittance of 0.1 to 40%, and an average transmittance at a wavelength of 800 to 1,000 nm of 65% or more. The second light shielding region has an optical density of 4 or more. The second light shielding region has a luminous reflectance of 0.1 to 1% and an average reflectance R1 at a wavelength of 600 to 700 nm being 1.5 times or more of an average reflectance R2 at a wavelength of 400 to 600 nm of the second light shielding region.