Backlight Module Optical Film Sheet Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current backlight modules suffer from light leakage issues due to their design structure, which complicates assembly and affects the appearance and efficiency of electronic display products, particularly requiring the use of light-shielding tapes that can lead to scratches during assembly.
Innovation Solution
A backlight module design featuring a back plate with a light guide plate and an optical film sheet, where the optical film sheet is fixedly connected to the light guide plate without the need for a baffle plate or convex lug, eliminating the necessity for light-shielding tapes on the back plate and improving assembly efficiency by avoiding direct contact with the worktable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a baffle plate with convex lug structure is used to fix the optical film sheet, then the optical film sheet can be secured to the back plate, but light leakage occurs at the engagement gaps requiring additional light-shielding tapes
Solution Approach 1:
The patent removes the baffle plate component entirely from the backlight module structure. Instead of using a baffle plate with convex lugs that create engagement gaps, the optical film sheet is directly fixed to the bottom plate through adhesive, eliminating the source of light leakage at engagement gaps.
Solution Approach 2:
The patent merges the fixation function into a simpler adhesive bonding system between the optical film sheet and bottom plate, eliminating the need for separate baffle plate and convex lug components. This integration removes the engagement gaps that cause light leakage.
2Object-generated harmful factors
If light-shielding tapes are applied to prevent light leakage, then light leakage is reduced, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent eliminates the need for light-shielding tapes by removing the baffle plate structure that causes light leakage in the first place. This removes the additional assembly step of applying light-shielding tapes, thereby improving assembly efficiency.
Solution Approach 2:
The optical film sheet is pre-fixed to the bottom plate using adhesive before final assembly, creating a seamless structure that prevents light leakage without requiring additional light-shielding tape application steps during assembly.
3Object-generated harmful factors
If light-shielding tapes are used to seal light leakage, then light leakage is prevented, but the optical film sheet is at risk of being scratched during assembly
Solution Approach 1:
The patent removes the baffle plate structure that necessitates light-shielding tapes, thereby eliminating the risk of optical film sheet scratches that occur during tape application and removal processes.
Solution Approach 2:
The optical film sheet is pre-fixed to the bottom plate using adhesive in a controlled manner before final assembly, avoiding the need for subsequent light-shielding tape application that could scratch the delicate optical film surface.
4Stability of the object's composition
If a baffle plate structure is used to fix the optical film sheet, then the optical film sheet can be secured, but the overall structure becomes more complex with additional components
Solution Approach 1:
The patent removes the baffle plate component from the backlight module structure, simplifying the overall design while maintaining fixation stability through direct adhesive bonding between the optical film sheet and bottom plate.
Solution Approach 2:
The fixation function is integrated directly into the bottom plate through adhesive bonding, eliminating the need for separate baffle plate components and reducing structural complexity while maintaining secure fixation of the optical film sheet.
Data Source
AI summary
A backlight module and a preparing method thereof, and a display device are provided. The backlight module includes a back plate, a light guide plate, and an optical film sheet. The back plate includes a bottom plate, the light guide plate is located inside the back plate, the optical film sheet is disposed on a side of the light guide plate away from the back plate and fixedly connected to the light guide plate, and an orthographic projection of the optical film sheet on a plane where the bottom plate is located is located in the bottom plate.