Display Device Sealing Member Positioning for Waterproofness and Brightness Uniformity
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Solution Overview
Problem
Conventional display devices with sealing members between a mask and a case often experience deformation due to repulsion forces, leading to uneven brightness and impaired visibility, especially when viewed from different angles, while loose sealing compromises waterproofness.
Innovation Solution
The sealing member is positioned with a first protrusion in the A3 region, rather than the A2 region, to reduce the pushing force on the mask, thereby maintaining waterproofness without deforming the mask and ensuring even light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is positioned in the A2 region between the mask and case, then waterproofness is improved, but the mask deforms due to repulsion force causing uneven brightness
Solution Approach 1:
The sealing member is repositioned from the A2 region (between mask and case) to the A3 region (between case and substrate), changing the spatial dimension of sealing. This dimensional shift allows the sealing function to be maintained while eliminating the harmful repulsion force on the mask, thus preserving brightness uniformity.
Solution Approach 2:
The substrate serves as an intermediary element between the sealing member and the mask. By positioning the sealing member between the case and substrate rather than directly between case and mask, the substrate mediates the interaction, preventing direct repulsion of the mask while maintaining the sealing chain's waterproof integrity.
2Reliability
If the sealing member is positioned closer to the mask to ensure sealing, then waterproofness is improved, but visibility is impaired due to mask deformation
Solution Approach 1:
The sealing position is shifted from the A2 region (near mask) to the A3 region (near substrate), changing the spatial dimension. This allows waterproof sealing to be maintained through the continuous sealing chain while eliminating mask deformation that impairs visibility.
Solution Approach 2:
The substrate acts as an intermediary that separates the sealing member from the mask, allowing the sealing function to operate effectively without directly deforming the mask and impairing visibility.
3Reliability
If the sealing member exerts repulsion force on the mask to maintain sealing, then waterproofness is improved, but light distribution becomes uneven
Solution Approach 1:
The sealing action is relocated from the A2 region where it directly compresses the mask to the A3 region where it seals between the case and substrate. This dimensional relocation maintains the sealing force necessary for waterproofness while eliminating the harmful compression that causes uneven light distribution.
Solution Approach 2:
The substrate serves as a mediator that absorbs the sealing force, preventing direct transmission of repulsion force to the mask. This allows effective sealing to occur without disturbing the mask's position and maintaining uniform light distribution.
Data Source
AI summary
A display device includes a substrate, a mask, a case, and a sealing member. The mask has a mask surface and a side wall provided around a periphery of the mask surface and projecting backwardly from the mask surface. The mask is provided on a front surface of the substrate so that the mask surface faces the front surface of the substrate and the side wall surrounds a side surface of the substrate. The case is provided on a back surface of the substrate to sandwich the substrate between the mask and the case. The sealing member is provided in a first region, a second region, and a third region provided between the first region and the second region. The sealing member has a first protrusion which is in contact with a step end surface of the case in the third region.