Backlight Module Optical Film Slot Adhesive Design
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Solution Overview
Problem
Conventional backlight module designs with adhesives increase the overall thickness of display devices due to the use of adhesives tapes on flange lugs, which does not meet the design trend of narrow border display devices.
Innovation Solution
A backlight module design featuring a back plate with a light guide plate, optical films with elongated slots, and adhesive members of varying thicknesses, where the adhesive is placed within the slots to adhere the optical films and reduce overall thickness, while a carrying portion on the back plate securely holds the display panel without increasing the frame border width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rectangular flange lugs with adhesives tapes are used to fix optical films and light guide plates, then the structural stability is improved, but the overall thickness of the backlight module increases
Solution Approach 1:
The patent removes the protruding flange lugs and adhesives tapes from the conventional structure, extracting the thickness-increasing elements while maintaining the fixing function through a different mechanism (adhesive layer integrated into the optical film structure)
Solution Approach 2:
The patent transitions from a three-dimensional protruding flange structure to a two-dimensional integrated adhesive layer within the optical film, changing the dimensional approach to achieving structural stability without thickness increase
2Reliability
If adhesives tapes are adhered on flange lugs and mold frame, then the optical films and light guide plates can be securely fixed, but the border width of the display device increases
Solution Approach 1:
The patent merges the fixing function with the optical film structure itself, combining the adhesive layer into the optical film rather than using separate flange lugs and adhesives tapes, thereby eliminating the need for additional border space
3Ease of manufacture
If conventional flange lug structure with adhesives is used, then the optical components can be positioned and adhered, but the design requirement of narrow border cannot be met
Solution Approach 1:
The patent segments the adhesive function from the mechanical flange structure, placing adhesive layers at specific positions within the optical film structure, allowing for precise positioning without requiring overall border width increase
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 design reduces the overall thickness of the backlight module and display device while ensuring secure attachment of the display panel, aligning with the narrow border design requirement and enhancing reliability without affecting the display area.
Implementation Method 1
an adhesive member, a second optical film... One portion of the adhesive member is disposed in the elongated slot... a portion of the second optical film overlaps the elongated slot of the first optical film so as to be adhered on the portion of the adhesive member
Data Source
AI summary
A backlight module and a display device are provided. The backlight module includes a back plate, a light guide plate, a first optical film, an adhesive member, a second optical film and a light source. The light guide plate is disposed in the back plate. The first optical film is disposed above the light guide plate, in which the first optical film has an elongated slot. One portion of the adhesive member is disposed in the elongated slot. The second optical film is disposed above or under the first optical film, and a portion of the second optical film overlaps the elongated slot of the first optical film so as to be adhered on the portion of the adhesive member which is located in the elongated slot. The light source is disposed on the back plate adjacent to a light-incident surface of the light guide plate.