Display Cushion Plate Coating for Through-Hole Mura Reduction
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Solution Overview
Problem
Display apparatuses with through-holes experience mura phenomena and reduced visibility due to light and shade differences caused by varying light transmittance, which are exacerbated by components inserted into the display area.
Innovation Solution
Incorporating a cushion plate with a porous member and a nickel-containing metal coating layer having a thickness of 0.2 μm to 0.5 μm within the display area to minimize light transmittance differences and improve luminous reflectance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a through-hole is defined in the display area to insert components, then the non-display area is minimized and user immersion is increased, but light transmittance differences cause color changes and mura phenomenon
Solution Approach 1:
The cushion plate is designed with a through-hole only in the non-display area, maintaining uniform material composition and light-blocking properties in the display area. This local differentiation allows component placement without compromising screen color uniformity, as the display area retains its original optical characteristics.
Solution Approach 2:
The cushion plate serves as an intermediary layer between the display panel and front cover, providing a platform for component mounting in the non-display area while maintaining the optical integrity of the display area. This mediator structure enables component integration without directly affecting the display region's light transmission properties.
2Adaptability or versatility
If various layers with different colors are stacked inside the display apparatus, then component integration is achieved, but visibility is deteriorated due to differences in luminous reflectance on the front surface
Solution Approach 1:
The cushion plate is designed with uniform material composition and consistent optical properties across its surface. By using a homogeneous structure with controlled light-blocking characteristics, the cushion plate minimizes variations in luminous reflectance, ensuring uniform front surface appearance while accommodating integrated components.
Data Source
AI summary
A display apparatus includes a cover member, a display panel disposed on a back surface of the cover member, a cushion plate disposed on a back surface of the display panel, and a through-hole extending through the cushion plate, the cushion plate includes a porous member and a metal coating layer disposed on a back surface of the porous member, and the metal coating layer contains nickel (Ni) and has a thickness in a range from 0.2 μm to 0.5 μm.