Curved Display Lamination With Deformable Punch Contact
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Solution Overview
Problem
Current methods for laminating protective screens onto non-flat or two-dimensional display panels in the automotive sector often result in air bubbles being trapped, leading to light scattering and a degraded display due to the curvatures and reliefs of the panels.
Innovation Solution
A method involving a die with an elastically deformable punch and damping means to guide and press a transparent or translucent protective screen onto a flexible display support, ensuring a gradual and uniform contact to avoid air bubbles, using a process where the punch's shape is progressively matched to the display support's three-dimensional shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If vacuum application or roller processes are used to laminate the protective screen onto the display panel, then the lamination process can be performed, but air bubbles are trapped between the screen and the panel due to curves and contours, resulting in degraded display quality
Solution Approach 1:
The display panel is pre-formed with the desired curved three-dimensional shape before the lamination process begins. This preliminary shaping allows the panel to match the curvature of the protective screen, enabling complete surface contact during lamination and preventing air bubble entrapment throughout the manufacturing process
Solution Approach 2:
The invention applies curved surfaces to both the display panel and protective screen, matching their three-dimensional shapes. This curvature matching ensures that when the components are laminated together, their surfaces conform to each other, eliminating gaps where air bubbles could form and maintaining display quality
2Shape
If the display panel is made non-flat or three-dimensional to meet design requirements, then aesthetic and functional goals are achieved, but air bubbles are trapped during lamination due to curves and contours
Solution Approach 1:
The display panel is pre-formed with the desired curved three-dimensional shape before lamination. This preliminary action ensures that the panel's geometry is finalized in advance, allowing the lamination process to proceed without creating air bubbles, as the surfaces are already matched
Solution Approach 2:
The invention converts the potential harm of complex curved geometries into a benefit by using matching curves on both the display panel and protective screen. The coordinated three-dimensional shapes ensure complete surface contact during lamination, transforming what could be a source of air bubbles into a means of achieving bubble-free bonding
3Device complexity
If traditional lamination methods are used on curved surfaces, then the process is simple, but light scattering occurs due to trapped air bubbles, altering the light path
Solution Approach 1:
The display panel is pre-formed with the correct curved geometry before lamination, ensuring that the surfaces are matched in advance. This preliminary action prevents light scattering by eliminating air bubbles, maintaining proper light transmission through the laminated structure
Solution Approach 2:
By applying matching curved surfaces to both the display panel and protective screen, the invention ensures that light passes uniformly through the laminated assembly without scattering. The coordinated three-dimensional shapes eliminate air gaps that would otherwise disrupt light paths and reduce illumination quality
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
This method effectively prevents air bubbles from forming during the lamination process, ensuring a clear and uniform display by maintaining contact and matching the punch's shape to the display support's curvature, thus enhancing the visual quality of the display panel.
Implementation Method 1
Positioning and fixing the display support (4) on an upper part (12) of the matrix (10) equipped with an elastically deformable punch (18), said display support (4) being positioned so that it rests on a curved external surface of said punch (18)
Implementation Method 2
damping means (17) disposed between the lower part (11) and the upper part (12), said damping means (17) being intended to keep said lower and upper parts (11, 12) apart
Implementation Method 3
Supply of a flexible display support having a curved three-dimensional shape substantially identical to that of the protective screen and preferably covered at least partially by an adhesive film
Data Source
Figure 1~3
Figure 4~6
Figure 7~8c
AI summary
The invention relates to a method for laminating a protective screen (3) onto a flexible display support (4), notably an electronic tile, said method being based on bringing a protective screen (3) and a display support (4) progressively into contact by means of an elastically deformable punch (18) until a maximum area (4a) of contact between said protective screen (3) and said display support (4) is achieved in a configuration in which the assembly formed by the protective screen (3) and the display support (4) is fully laminated, the external surface of the punch (18) therefore having a three-dimensional shape substantially equal to that of the display support (4).