Backlight Module Blocking Member for Mini-LED Seam Elimination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mini-LED backlight modules, the seams between spliced lamp boards form bright or dark lines, affecting display quality due to limitations in chip mounting equipment and yield, leading to gaps that cause uneven light emission.
Innovation Solution
A backlight module design featuring a blocking member with inclined surfaces and a transparent portion to cover the gap between circuit boards, ensuring uniform light reflection and emission, thereby preventing the formation of bright or dark lines at the seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple lamp boards are spliced to cover the display area, then the backlight module can accommodate larger display areas, but seams are formed at the splicing positions causing bright or dark lines that affect display quality
Solution Approach 1:
A blocking member is introduced as an intermediary component between adjacent lamp boards to cover and block the gap portions formed at splicing positions. This blocking member prevents light leakage through the gaps, thereby eliminating the formation of bright or dark lines at seams while maintaining the ability to cover large display areas with multiple lamp boards
Solution Approach 2:
The blocking member features different structural zones: a blocking portion with inclined surfaces for light reflection, a transparent portion for light transmission, and a supporting portion for structural support. Each zone has optimized local properties to address specific requirements - the blocking portion eliminates seams, the transparent portion maintains light output, and the supporting portion ensures mechanical stability
2Object-affected harmful factors
If a blocking member is added to cover the gap portion, then the seam visibility is reduced, but the device structure becomes more complex
Solution Approach 1:
The blocking member is designed to perform multiple functions simultaneously: it blocks light leakage from gap portions, supports the optical sheet, and provides structural connection between lamp boards. By consolidating these functions into a single component, the overall structural complexity is minimized while achieving multiple objectives
3Object-affected harmful factors
If the blocking member blocks all light from the gap, then seam visibility is eliminated, but light distribution uniformity may be affected
Solution Approach 1:
The blocking member incorporates a transparent portion that allows light to pass through, combined with a blocking portion that reflects light. This localized differentiation ensures that while gap portions are blocked to eliminate seams, sufficient light still reaches the optical sheet through the transparent portion, maintaining overall light distribution uniformity
Solution Approach 2:
The inclined surfaces of the blocking portion are designed to reflect light that would otherwise be lost into the gap back toward the optical sheet. This converts the potentially harmful light leakage path into a beneficial light redirection mechanism that enhances light utilization and maintains uniformity
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 effectively improves display image quality by ensuring consistent light distribution across the display area, eliminating the appearance of seams and enhancing the overall display experience.
Implementation Method 1
the first inclined surface and the second inclined surface converge in a direction toward a light exit side to reflect light incident thereon toward the light exit side
Implementation Method 2
a light diffusion structure is provided on a surface of the blocking portion facing the transparent portion
Data Source
AI summary
Disclosed are a backlight module and a display device. The backlight module includes a substrate; a first circuit board and a second circuit board thereon, a gap portion is between the two circuit boards; a blocking member for blocking the gap portion; and an optical sheet on a side of the blocking member facing away from the substrate, wherein the blocking member includes a blocking portion, a space is provided between the blocking portion and the optical sheet, an orthographic projection of the blocking portion on the substrate covers that of the gap portion, and wherein the blocking portion includes a first inclined surface inclined with respect to the first circuit board and a second inclined surface inclined with respect to the second circuit board, and the two inclined surface converge in a direction toward a light exit side to reflect light incident thereon toward the light exit side.