Substrate Structure with Convex Members for Backlight Protection

The patent introduces a substrate structure with convex members as an intermediary component between the point light sources and the optical sheets. The convex members extend from the wall of the substrate structure toward the optical sheets, creating a protective barrier that prevents direct contact during installation while maintaining the close positioning needed for high optical efficiency. This intermediary structure resolves the contradiction by allowing the light sources to remain close to the optical sheets for optimal light coupling while physically protecting both the electrical elements and optical sheets from damage.

The patent applies local quality by creating a non-uniform spacing structure where the convex members provide localized protection in specific areas while maintaining close proximity in other areas. The convex members are positioned to provide damage protection where needed during installation, while the overall structure maintains the close spacing required for optimal light coupling between the point light sources and optical sheets. This localized approach allows simultaneous achievement of both protection and optical efficiency.

The patent implements beforehand cushioning by pre-installing the convex members on the substrate structure wall before the optical sheets are placed. These convex members protrude toward the optical sheets and create a protective buffer zone that cushions against accidental contact during installation and replacement operations. This prior protective measure allows the point light sources to be positioned close to the optical sheets for maximum optical efficiency while preemptively protecting against the harmful damage risk during handling.