Micro LED Backlight Support via Intermediary Pillars
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Solution Overview
Problem
The existing liquid crystal display technologies face challenges in designing a support structure for diffusing plates in direct type backlight modules using micro light emitting diodes, as the small spacing between LEDs makes traditional hole-punching methods risky for damaging the LEDs and the glass substrate, and requires a solution that maintains light uniformity and efficiency.
Innovation Solution
A display apparatus with a micro light emitting diode light board that includes a base substrate, a driving line layer, micro light emitting diodes, a reflective layer, and a packaging layer, where through holes are strategically arranged to accommodate a supporting pillar for the diffusing plate, allowing for even light mixing and distribution without direct contact that could damage the LEDs or substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional hole-punching methods are used to support the diffusing plate, then the support structure can be simple, but the micro light emitting diodes and glass substrate may be damaged due to small spacing between LEDs
Solution Approach 1:
A support layer is introduced as an intermediary component between the diffusing plate and the micro light emitting diode light board. This support layer includes multiple support columns that are positioned in regions between adjacent micro light emitting diodes, providing mechanical support for the diffusing plate without requiring direct contact with or holes through the fragile light board and substrate. The support columns act as mediators that transfer the load from the diffusing plate to the back plate through safe zones between the LEDs.
Solution Approach 2:
The support structure is segmented into multiple discrete support columns rather than using a continuous support framework. These support columns are strategically positioned in the spaces between adjacent micro light emitting diodes, dividing the support function into localized points that avoid interfering with the LED array while collectively providing sufficient mechanical support for the diffusing plate.
2Reliability
If a support structure is added to protect LEDs and substrate, then reliability improves, but the backlight module thickness increases
Solution Approach 1:
The support columns are designed with a thin-film profile, having a height that is significantly smaller than the overall dimensions of the backlight module. This allows the support structure to provide necessary mechanical protection while maintaining a compact, thin design. The support layer acts as a thin intermediary film that bridges the gap between the light board and diffusing plate without adding substantial thickness.
3Ease of operation
If through holes are arranged between adjacent micro light emitting diodes, then the diffusing plate can be supported, but light mixing and uniformity may be affected
Solution Approach 1:
The support columns are strategically positioned in the regions between adjacent micro light emitting diodes, utilizing the existing spaces in the LED array. By placing supports in these inter-LED regions rather than through the LEDs themselves or in areas that would disrupt light paths, the design provides mechanical support while preserving light mixing and uniformity in the critical light-emitting zones.
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
This configuration ensures stable and efficient light mixing and distribution, preventing damage to the micro light emitting diodes and substrate while maintaining the thin and light design requirements of the backlight module, enhancing the display's brightness and uniformity.
Implementation Method 1
a micro light emitting diode light board, arranged on a side of the back plate and configured to be a backlight source
Implementation Method 2
ensure sufficient light mixing between light sources
Data Source
AI summary
A display apparatus includes a display panel and a backlight module. The backlight module includes: a back plate, a micro light emitting diode light board, and a diffusing plate bracket. The micro light emitting diode light board includes a plurality of through holes, the diffusing plate bracket is arranged in the through holes and fixed on the back plate via the through holes.