Light Sheet Bumper Curvature for Stable Gap Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bumpers used in backlighting applications are susceptible to dislodging during installation, leading to damage and uneven brightness spots on the illuminated surface.
Innovation Solution
A bumper design with a convexly curved profile and adhesive backing, featuring a central body and arm sections, which maintains a stable gap between the light sheet and backlit material, reducing displacement and uneven brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dome-shaped bumpers are used to maintain gap between light sheet and backlit material, then the gap is maintained and components are protected, but the bumpers are susceptible to dislodging and rolling out of place during installation
Solution Approach 1:
The bumper employs a convexly curved profile with a radius of curvature between 1.3-1.7 times the height of the bumper member. This specific curvature prevents the bumper from rolling out of place during installation while maintaining its gap-making function. The curved surface distributes contact forces more evenly compared to flat surfaces, enhancing stability without increasing complexity.
Solution Approach 2:
The invention specifies precise parameter relationships: the maximum radial extension is 30-70% of the height, and the radius of curvature is 1.3-1.7 times the height. By optimizing these geometric parameters, the bumper achieves stable gap maintenance while being resistant to dislodging during installation. The adhesive backing area is also optimized to be 50-150% of the total bumper surface area, providing sufficient adhesion without excessive complexity.
2Reliability
If bumpers are used to maintain gap between light sheet and backlit material, then gap is maintained for LED protection, but observable spots of uneven brightness such as dark or shadow spots are produced
Solution Approach 1:
The convexly curved profile of the bumper creates a more uniform light distribution pattern compared to flat or sharply angled surfaces. The curved surface scatters incident light more evenly across the backlit material, reducing concentrated shadow spots and dark areas. This geometric design maintains the necessary gap for LED protection while improving overall brightness uniformity.
Solution Approach 2:
By optimizing the radius of curvature to be 1.3-1.7 times the height and controlling the radial extension to 30-70% of height, the bumper achieves optimal light scattering characteristics. These parameter optimizations ensure that the bumper maintains its protective gap function while minimizing observable brightness variations on the illuminated surface.
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
The new bumper design minimizes unintentional displacement and ensures uniform illumination by maintaining a consistent gap, preventing damage and enhancing visual uniformity.
Implementation Method 1
The bottom side of the bumper may be provided with adhesive backing for attaching the bumper to a light sheet
Data Source
AI summary
Bumpers for maintaining a gap between a light sheet and a translucent material in backlighting applications, as well as installation kits comprising light sheets and such bumpers. In some embodiments, the bumper comprises a base part having a central body, one or more bumper members, and at least one arm section which extends radially outward from the central body and connects to a respective bumper member opposite the central body. The central body may have an opening for receiving a fastener therethrough, with each bumper further comprising a cap part for covering the opening. Bumper member profiles are also specified with respect to height, radial extension, and convex curvature parameters.