Curved Light Source Cover Groove Design for Display Alignment
Solution Overview
Problem
Conventional curved light source covers in display devices have rough surfaces, leading to uneven deformations and poor alignment with light guide plates, resulting in decreased luminous efficacy and visibility due to inadequate light transmission.
Innovation Solution
A backlight unit with a light source cover featuring a groove design that extends from its edge portion, allowing for a smooth curved profile, which includes a light source unit, a printed circuit board, and an adhesive member to ensure accurate alignment and even surface contact with the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conventional curved light source cover is used, then the light source cover can be mounted on the light guide plate, but the surface becomes rough and deformations occur between inner and outer surfaces, resulting in poor alignment and decreased light transmission
Solution Approach 1:
The light source cover is segmented into multiple sections along its curved length, with grooves created between these sections. This segmentation allows each section to be formed with precise curvature while the grooves accommodate deformation, preventing surface roughness and maintaining alignment precision between the light source cover and light guide plate
Solution Approach 2:
The grooves are strategically positioned at specific locations along the curved light source cover where deformation occurs between inner and outer surfaces. This local modification allows the cover to maintain smooth surfaces at critical alignment areas while accommodating necessary deformations in the groove regions, thus preserving overall manufacturing precision
Data Source
AI summary
A backlight unit includes a light source unit which has a curved shape, a light guide plate including a curved light incident surface on which light emitted from the light source unit is incident, and a light source cover which has a curved shape corresponding to the curved light incident surface and is configured to surround one side of the light guide plate to dispose the light source unit and the light incident surface inside thereof. A groove is defined in the light source cover and extends toward the inside of the light source cover from an edge portion thereof.