Polarizer with Spatially Varying Transmittance for Slim Bezel Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving a slim bezel design while maintaining image visibility and reducing ambient light influence, as traditional bezel structures often compromise on aesthetics and light leakage prevention.
Innovation Solution
The implementation of a polarizer with distinct transmittance regions, where the second region has a lower transmittance than the first region, is used in conjunction with a cover and display member to create a slim bezel by strategically positioning the polarizer to cover wires and define the bezel region, thereby reducing light leakage and enhancing aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a traditional bezel structure is used, then light leakage is prevented and wires are hidden, but the bezel width increases and aesthetic appeal decreases
Solution Approach 1:
The polarizer is designed with spatially varying transmittance properties: a first region with higher transmittance overlapping the active display region for optimal image visibility, and a second region with lower transmittance overlapping the surrounding region containing wires. This local differentiation allows the polarizer to simultaneously achieve slim bezel width while preventing light leakage and hiding wires in the bezel area.
2Area of stationary object
If a traditional bezel structure is used, then light leakage is prevented and wires are hidden, but the overall device size increases
Solution Approach 1:
The polarizer's second region with lower transmittance is specifically positioned to overlap the surrounding region containing wires, creating a visual barrier that hides the wires while allowing the display area to extend closer to the edges. This enables the display area to increase without exposing the underlying wire structure.
3Ease of manufacture
If a polarizer with uniform transmittance is used, then manufacturing is simplified, but image visibility and ambient light reduction are compromised
Solution Approach 1:
The polarizer incorporates a pattern part with spatially varying transmittance, including a first region with higher transmittance for the active display area and a second region with lower transmittance for the surrounding area. This patterned structure optimizes image visibility by allowing more light through the display region while reducing ambient light influence in the bezel region, achieved through controlled material distribution rather than complex multi-layer structures.
Data Source
AI summary
Provided is a display device including a display member having an active region in which images are displayed and a surrounding region adjacent to the active region, wires being disposed in the surrounding region, a cover having a transmission region through which the images are transmitted and a bezel region adjacent to the transmission region, and a polarizer between the display member and the cover, the polarizer having, in a plan view, a first region overlapping the active region and having a first transmittance and a second region overlapping the surrounding region and having a second transmittance lower than the first transmittance.