Multi-Panel Display Layout for Narrow Frames and Smooth Glass Contact
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Solution Overview
Problem
Existing on-vehicle display devices with multiple display panels face challenges in achieving a narrow frame design due to thermal contraction and vibration, leading to glass cullet generation and display panel breaks, especially when the end faces of adjacent panels contact.
Innovation Solution
The end faces of adjacent display panels are polished to a surface roughness of not more than 0.5 μm, reducing the likelihood of glass cullet and panel breaks by ensuring smooth contact surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display panels are disposed in parallel with narrow frame design, then the display area and unity with dashboard shape are improved, but thermal contraction and vibration cause end faces to contact, generating glass cullet and breaking panels
Solution Approach 1:
The patent applies parameter changes by controlling the surface roughness of the end faces to be not higher than 0.5 μm. This parameter control allows the end faces to slide smoothly during thermal contraction and vibration, preventing glass cullet generation and panel breaks while maintaining the narrow frame design with improved display area.
2Shape
If the frame between display panels is reduced, then the visual unity and display effectiveness are improved, but the risk of panel contact due to thermal and mechanical stress increases
Solution Approach 1:
The patent controls the surface roughness parameter of the end faces to not higher than 0.5 μm, enabling smooth sliding contact that prevents glass cullet generation. This allows the frame width to be reduced for better visual unity while mitigating the harmful effects of thermal contraction and vibration through the smooth surface interaction.
3Device complexity
If display panels are bonded closely to achieve narrow frame, then manufacturing complexity is reduced, but thermal contraction causes end face contact and display failures
Solution Approach 1:
The patent specifies a surface roughness parameter of not higher than 0.5 μm for the end faces, which balances the bonding structure simplicity with the required surface quality. This parameter control prevents display failures from thermal contraction while maintaining a relatively simple bonding structure for close panel arrangement.
Data Source
AI summary
An aspect of this disclosure is a display device including a support substrate, a first display panel that is bonded to a first face of the support substrate with a first bonding region, and a second display panel that is bonded to the first face of the support substrate with a second bonding region. The first display panel includes a first glass substrate. The second display panel includes a second glass substrate. A first end face of the first glass substrate and a second end face of the second glass substrate are opposed to each other. The first end face and the second end face have a surface roughness Ra not higher than 0.5 μm.