Transparent-Region Display Structure to Block Camera Light Leakage
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Solution Overview
Problem
Light emitted from the backlight unit of an electro-optical device leaks towards the camera module, degrading its performance.
Innovation Solution
The electro-optical device incorporates a bezel and cap film configuration that blocks light from the backlight unit, ensuring the camera module is not overlapped with the transparent region, using materials that differ in rigidity and transparency to enhance adhesion and prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camera module is mounted in the transparent region, then the field of view and design flexibility are improved, but light from the backlight unit leaks toward the camera module degrading its performance
Solution Approach 1:
The transparent region is segmented into two functional zones: a first transparent region that allows light transmission for the camera module, and a second transparent region with different transparency characteristics. This segmentation enables the camera module to be positioned in the transparent region while the second transparent region blocks backlight light from reaching the camera module, thus resolving the light leakage problem while maintaining design flexibility.
Solution Approach 2:
Different regions of the transparent region are assigned different optical properties. The first transparent region maintains high transparency for normal light transmission, while the second transparent region has reduced transparency specifically to block backlight light. This local differentiation allows the camera module to function properly without being affected by backlight leakage.
2Area of moving object
If the transparent region is positioned to overlap with the camera module, then the field of view is expanded, but the camera module is exposed to backlight light causing image quality degradation
Solution Approach 1:
The transparent region is divided into a first transparent region allowing full light transmission for expanded field of view, and a second transparent region with blocked light transmission to prevent backlight leakage. This segmentation enables the camera module to capture a wider field of view while being protected from backlight interference that would degrade image quality.
Solution Approach 2:
The second transparent region acts as an intermediary element between the backlight unit and the camera module. It selectively blocks light from the backlight unit while allowing light from the external environment to reach the camera module, thus expanding the field of view without compromising image quality.
3Ease of manufacture
If a single material is used for the transparent region, then the manufacturing process is simplified, but adhesion between components is insufficient
Solution Approach 1:
The transparent region is constructed using composite materials with different transparency characteristics. The first transparent region uses a material with high transparency, while the second transparent region uses a material with reduced transparency. This composite structure improves adhesion between the transparent region and adjacent components while maintaining the manufacturing feasibility through a multi-layer construction approach.
Data Source
AI summary
A display device which is an electro-optical device includes a panel including a first substrate, a second substrate, and a liquid crystal layer and having a display region, a transparent region provided inside the display region, and a frame region provided between the transparent region and the display region. A backlight unit is provided below the panel so as not to overlap with the transparent region. A bezel is provided below the backlight unit so as not to overlap with the transparent region. A cover member is provided above the second substrate so as to overlap with the transparent region. Also, a cap film made of a material different from that of the bezel covers at least a lateral side of the backlight unit in the frame region.