Mini-LED Backlight Module Reflective Layer Splicing Gap
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Solution Overview
Problem
Backlight modules using mini-LEDs suffer from poor display phenomena such as bright lines or dark lines at splicing gaps between spliced light boards, affecting the light extraction effect and overall display quality.
Innovation Solution
A backlight module design that includes a reflective layer covering the splicing gaps between mini-LED light boards and a light-transmitting layer disposed on one side of the reflective layer, which reflects and mixes the light to improve light extraction, preventing poor display issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple mini-LED light boards are spliced together to form large-sized backlight modules, then the backlight module can cover large display areas, but splicing gaps form between the light boards causing bright lines or dark lines and poor display quality
Solution Approach 1:
A reflective layer is introduced as an intermediary component between adjacent light boards at the splicing gaps. This reflective layer receives light from one side and reflects it toward the other side, acting as a mediator to balance the light distribution across the gap and eliminate the bright or dark line defects caused by direct light incidence on the gap surface
Solution Approach 2:
The reflective layer is selectively disposed only at the splicing gap regions where light extraction problems occur, rather than covering the entire backlight module. This localized approach addresses the specific issue at the gaps while maintaining the overall performance of the large-sized backlight module
2Device complexity
If splicing gaps are left empty without mini-LED lamp beads, then the structure remains simple, but light extraction effect deteriorates at the gap locations
Solution Approach 1:
The reflective layer serves as an intermediary that recovers light energy that would otherwise be lost at the splicing gaps. By reflecting light from one side toward the other side, it prevents light energy from being lost through the gap and redirects it to contribute to the overall light output, thereby improving light extraction efficiency without adding complex lighting structures
Solution Approach 2:
The splicing gaps, which originally represent a defect or loss area, are converted into beneficial regions by introducing the reflective layer. The gaps that would normally cause bright or dark lines are transformed into areas that improve light extraction efficiency, turning the harmful effect of the gaps into a beneficial feature
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 solution enhances the light extraction effect at splicing gaps, preventing bright lines or dark lines and improving the overall display quality of the backlight module.
Implementation Method 1
a reflective layer disposed on the light-emitting surface of the at least two backlight light boards and covering the splicing gap
Implementation Method 2
a light-transmitting layer disposed on one side of the reflective layer away from the splicing gap
Data Source
AI summary
A backlight module and a display device are disclosed. The backlight module includes a backlight light board assembly, a reflective layer, and a light-transmitting layer. The backlight light board assembly includes at least two backlight light boards spliced to each other, a splicing gap is defined between two backlight light boards spliced to each other, the reflective layer covers the splicing gap, and the light-transmitting layer is disposed on one side of the reflective layer away from the splicing gap. By disposing the reflective layer and the light-transmitting layer, light can be reflected to the light-transmitting layer by the reflective layer, thereby improving a light extraction effect at the splicing gap.