Backlight Module Buffer Structure for Blind-Hole Screens
Solution Overview
Problem
In displaying devices with blind-hole screens, the rigid support structures within the backlight module can cause breakage of optical film materials during reliability tests, and the formation of small-aperture through-holes is limited by the need to support the display panel, leading to structural weaknesses and light leakage issues.
Innovation Solution
A backlight module design featuring a first support structure with a through-hole and a buffer structure, where the buffer portion has lower rigidity than the support structure, positioned away from the light-outgoing side, and a second buffer portion connected perpendicularly, allowing for a smaller aperture through-hole without compromising structural integrity or light shielding, and incorporating a detachable second support structure for enhanced strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid support structure is arranged along the side wall of the through-hole to enhance the strength of the backlight module, then the structural strength is improved, but the optical film material may break during reliability tests due to the rigidity of the support structure
Solution Approach 1:
The patent changes the rigidity parameter of the support structure by using a buffer structure with lower rigidity than traditional rigid support structures. The buffer structure has a rigidity of 0.1-10 MPa, which is significantly lower than conventional rigid materials, allowing it to deform and absorb stress during reliability tests to prevent optical film material breakage while still providing necessary structural support.
Solution Approach 2:
The patent employs a composite structure combining a first support structure with a buffer structure. The buffer structure is made of elastic material that complements the rigid support structure, creating a composite system that provides both structural strength and stress absorption capabilities, preventing optical film material failure during reliability testing.
2Shape
If a small-aperture through-hole is formed in the optical film material to achieve blind-hole screen design, then the frame width is minimized, but the structural integrity is compromised and light leakage occurs
Solution Approach 1:
The support structure is segmented into a first support structure and a buffer structure. The first support structure provides rigid support for structural integrity, while the buffer structure provides flexible support that can deform to maintain integrity around the small-aperture through-hole, preventing light leakage while enabling the blind-hole screen design.
Solution Approach 2:
The patent applies different rigidity qualities to different parts of the support structure. The first support structure has high rigidity for maintaining overall structural integrity, while the buffer structure has low rigidity (0.1-10 MPa) to locally adapt to the small-aperture through-hole area, preventing stress concentration and light leakage around the aperture.
3Strength
If a rigid support structure is used to support the display panel, then the structural strength is improved, but light leakage occurs due to the rigid structure's inability to adapt to small-aperture through-holes
Solution Approach 1:
The patent changes the rigidity parameter of the support structure in the through-hole region by introducing a buffer structure with rigidity of 0.1-10 MPa. This lower rigidity allows the support structure to adapt to small-aperture through-holes, preventing light leakage while the first support structure maintains overall structural strength.
Solution Approach 2:
The buffer structure acts as a flexible element within the support structure, allowing it to deform and conform to the small-aperture through-hole geometry. This flexibility prevents light leakage by ensuring proper coverage and sealing around the aperture while maintaining structural support.
Data Source
AI summary
The embodiments of the application provide a backlight module and a displaying device, relating to the technical field of display. The backlight module comprises a first support structure, an optical film material and a buffer structure; the first support structure is arranged on a side away from a light-outgoing side of the optical film material, and the first support structure and the optical film material have a through-hole; the buffer structure comprises a first buffer portion arranged in the through-hole, and a rigidity of the first buffer portion is less than a rigidity of the first support structure. The backlight module is internally provided with the buffer structure, and the first buffer portion in the buffer structure is arranged in the through-hole that penetrates through the first support structure and the optical film material.