Sensor-Integrated Display Coating Structure for Light Leakage Control
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Solution Overview
Problem
Existing display devices face challenges in achieving accurate biometric information acquisition and improved display quality due to issues with light leakage and sensor integration, which affect user authentication and overall display performance.
Innovation Solution
A display device design that includes a first coating layer with a specific modulus and a second coating layer with a higher modulus, featuring an opening with a sloped sidewall, where a sensor part is positioned on the second coating layer to enhance light control and reduce light leakage, while improving touch signal quality and preventing wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor part is integrated into the display device for biometric information acquisition, then user authentication capability is improved, but light leakage occurs that deteriorates display quality
Solution Approach 1:
The coating layer is divided into multiple segments: a first coating layer covering the sensor part and a second coating layer covering the display area. This segmentation allows the first coating layer to block light for the sensor while the second coating layer maintains display quality, preventing light leakage without compromising biometric acquisition capability.
Solution Approach 2:
The first coating layer acts as an intermediary between the sensor part and the display area. It selectively blocks light in the sensor region while allowing the second coating layer to maintain optical properties in the display region, thus preventing light leakage without affecting biometric information acquisition.
2Object-generated harmful factors
If a coating layer is added to prevent light leakage, then display quality is improved, but wrinkles may form that deteriorate touch signal quality
Solution Approach 1:
Different regions of the coating structure have different properties: the first coating layer has light-blocking properties for the sensor area, while the second coating layer has optical transparency for the display area. This local differentiation prevents wrinkles from forming across the entire surface, maintaining touch signal quality while preventing light leakage where needed.
Solution Approach 2:
The coating structure uses composite material arrangement with a first coating layer and a second coating layer having different material properties. The first layer provides light blocking for the sensor, while the second layer maintains optical clarity for the display, preventing wrinkle formation that would compromise touch sensitivity.
3Measurement precision
If the opening in the first coating layer has a larger area to improve sensor light reception, then biometric detection accuracy is improved, but light leakage increases that deteriorates display quality
Solution Approach 1:
The coating structure is segmented into a first coating layer with an opening for the sensor and a second coating layer that covers the display area. This segmentation allows the opening to be sufficiently large for accurate biometric detection while the second coating layer prevents light leakage in the display region, resolving the contradiction between detection accuracy and light leakage prevention.
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 design reduces light leakage, enhances touch signal quality, and prevents wrinkles, resulting in improved display performance and user authentication accuracy.
Implementation Method 1
a first coating layer disposed on the display panel opposite the exterior facing surface and defining an opening, a second coating layer disposed on the first coating layer and in the opening, and a sensor part disposed on the second coating layer opposite the first coating layer
Data Source
AI summary
A display device includes a display panel having an exterior facing surface, a first coating layer disposed on the display panel opposite the exterior facing surface and defining an opening, a second coating layer disposed on the first coating layer and in the opening, and a sensor part disposed on the second coating layer opposite the first coating layer.