Optical Structure with Patterned Openings for Display Reflectivity Reduction
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Solution Overview
Problem
Display devices with integrated touch sensors face challenges in minimizing reflectivity around the periphery of touch sensor holes, leading to visible lines and flare phenomena due to light reflection, which affect the user experience and image quality.
Innovation Solution
The implementation of an optical structure with a pattern of openings in the non-sensing area surrounding the touch sensor holes, combined with a polarization layer and specific insulation and metal oxide films, reduces light reflectivity by scattering incident light and minimizing the visibility of underlying lines and reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a touch sensor is integrated into the display panel with through-holes in the non-sensing area, then the sensor module can be disposed in the display area to minimize the bezel, but light reflection occurs at the periphery of the holes causing visible lines and flare phenomena
Solution Approach 1:
The patent applies local quality by creating an optical pattern with varying refractive indices in specific regions around the through-holes. The optical pattern includes a first region with a first refractive index and a second region with a second refractive index different from the first, allowing different parts of the optical pattern to handle light differently - reducing reflection at critical interfaces while maintaining display quality in the display area.
Solution Approach 2:
The optical pattern acts as an intermediary layer between the touch sensor and the display panel. By introducing this intermediate structure with controlled refractive indices, the patent mediates the light transmission path, reducing direct reflection at the through-hole periphery while allowing light to pass through to the sensor module.
2Object-affected harmful factors
If the optical pattern is disposed in the non-sensing area, then light reflectivity is reduced, but the structural complexity of the display device increases
Solution Approach 1:
The patent merges the optical pattern formation with existing manufacturing processes by disposing the optical pattern in the non-sensing area during the same fabrication sequence as other display components. This combining approach reduces the need for separate processing steps, thereby mitigating the increase in manufacturing complexity despite adding functional layers.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the refractive index of materials in different regions of the optical pattern. By controlling the refractive index parameters during material selection and layer formation, the patent achieves effective light reflection reduction through material property optimization rather than adding complex structural elements.
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 solution effectively decreases the reflectivity of light around the touch sensor holes, enhancing the display's aesthetic appeal and image quality by making lines and reflections less visible, thereby improving the overall user experience.
Implementation Method 1
reduces light reflectivity by scattering incident light
Implementation Method 2
a polarization layer disposed on the touch sensor so as to overlap the sensing area
Data Source
AI summary
Provided herein is a display device including a base layer having a non-sensing area and a sensing area configured to surround the non-sensing area, a touch sensor disposed on the sensing area of the base layer, an optical structure disposed on the base layer, and a polarization layer disposed on the touch sensor so as to overlap the sensing area. The touch sensor and the optical structure include a first through hole located in the non-sensing area, and the non-sensing area includes a first area corresponding to the first through hole and a second area configured to surround the first area. The optical structure is disposed in the second area, and includes an optical pattern including a plurality of openings.