Frame Assembly Vacuum Evacuation for Adhesion Strength
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Solution Overview
Problem
The narrow frame design in display devices with backlight modules limits the width of adhesive tapes, leading to insufficient adhering-bonding strength due to reduced adhered area and potential air gaps, causing stability issues and risk of frame peeling.
Innovation Solution
A frame assembly with a first and second frame connected via an adhesive layer, featuring exhausting passages and through holes, allowing air evacuation to create a vacuum state, increasing the adhered area and adhesion completeness, thereby enhancing bonding strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the frame width is narrowed down to achieve narrow-bezel design, then the display device achieves a narrower bezel, but the adhered area of adhesive tapes is limited and air gaps remain, causing insufficient bonding strength
Solution Approach 1:
The patent introduces a vacuum system with exhausting passages and vacuum chambers that use negative pressure to press the adhesive layer against the frame surfaces. This pneumatic approach increases the adhered area and bonding strength without requiring wider frames, resolving the contradiction between narrow frame width and sufficient bonding strength.
Solution Approach 2:
The patent changes the pressure parameter from positive pressure (adhesive tape alone) to negative pressure (vacuum system). By creating a vacuum environment, the adhesive layer is pressed harder against the frame surfaces, increasing bonding strength while maintaining a narrow frame width.
2Stability of the object's composition
If adhesive tapes are used to connect the frame to the back plate, then the frame can be fixed, but air remains between the adhesive tapes and the frame or back plate, decreasing the adhered area
Solution Approach 1:
The vacuum system actively removes air from between the adhesive layer and the frame surfaces. The exhausting passages create negative pressure that draws air out, ensuring complete contact and maximizing the adhered area while maintaining stable frame fixation.
Solution Approach 2:
The vacuum system is activated before finalizing the adhesive bonding. By pre-evacuating air from the containing space, the adhesive layer is pressed into complete contact with the frame surfaces, ensuring maximum adhered area before the bonding is finalized.
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 frame assembly effectively increases the adhered area and adhesion completeness, enhancing the bonding strength and stability of the frame assembly, preventing peeling and supporting a narrow-bezel design in display devices.
Implementation Method 1
By evacuating the at least one exhausting passage of the first frame through an external vacuum device, the air in the second venting passage between the adhesive layer and the second frame can be guided
Data Source
AI summary
The frame assembly has a first direction and comprises a first frame, which has at least one exhausting passage, an adhesive layer, which has at least one through hole, and a second frame, which is connected to the first frame via the adhesive layer. A containing space is defined by the first frame and the second frame together and extends along the first direction. The exhausting passage fluidly communicates with the containing space and the external environment. The adhesive layer is disposed inside the containing space to divide the containing space into two venting passages that fluidly communicate with each other through the through hole. Residue air in the containing space is evacuated through the exhausting passage, increasing an adhered area and adhesion completeness of the adhesive layer, thereby increasing an adhesion-bonding strength of the two frames and structural stability of the frame assembly.