Drive Backplate Recesses for Reflective Layer Bonding
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Solution Overview
Problem
Conventional drive backplates in direct-lit LCD backlight modules experience detachment issues due to weak bonding between the reflective layer and wiring, affecting product quality.
Innovation Solution
A drive backplate design featuring a substrate with a wiring layer and a reflective layer where the reflective layer is partially disposed in recesses, increasing contact area and bonding force, and reducing the risk of detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a reflective layer is added to increase light utilization rate, then lighting efficiency is improved, but bonding force between reflective layer and wiring becomes weak causing detachment
Solution Approach 1:
The patent transitions from a planar reflective layer to a three-dimensional structure by adding recesses to the substrate. The reflective layer is disposed within these recesses, creating a multi-level configuration that increases the contact area between the reflective layer and the substrate/wiring assembly, thereby improving bonding force while maintaining light reflection functionality
Solution Approach 2:
The substrate is divided into multiple regions including recesses and flat portions. The reflective layer is selectively disposed in the recesses rather than covering the entire substrate surface, creating segmented zones that optimize both bonding (in recesses) and light output (in flat portions)
2Loss of energy
If reflective layer covers wiring completely, then light utilization is maximized, but detachment occurs at contact points reducing product quality
Solution Approach 1:
Different regions of the substrate are given different functions: recesses are designed for optimal reflective layer bonding with enhanced contact area, while flat portions provide uniform light output. The reflective layer is selectively placed in recesses where bonding is critical, rather than uniformly across all areas
Data Source
AI summary
A drive backplate and a display device are provided. The drive backplate includes a substrate, a wiring layer arranged on one side of the substrate, and a reflective layer. The reflective layer and the wiring layer are arranged on the same side of the substrate. The wiring layer includes at least one first type line, and the reflective layer covers the first type line. Each first type line includes at least one first recess, and the reflective layer is partially inside the first recess, so the present application increases a contact area between the reflective layer and the first type line, increases a bonding force between the reflective layer and the wiring layer, reduces a risk of detachment of the reflective layer from the wiring layer, and improves product quality of the display device having the drive backplate.