LCD Frame Recess Adhesive Fixation Narrow Bezel
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Solution Overview
Problem
Liquid crystal display panels with narrow picture-frames face challenges in securing a stable attachment of the backlight due to the limited area for double-faced tape, leading to integration issues between the backlight and the display panel.
Innovation Solution
A frame with recesses on its outer and upper surfaces is used to accommodate an adhesive, allowing the liquid crystal display panel to be fixed without the need for punched double-faced tape, enabling secure integration even with narrow frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a narrow picture-frame is used to improve display area ratio, then the area for attaching double-faced tape is reduced, but the backlight and liquid crystal display panel cannot be fixed reliably
Solution Approach 1:
The invention extracts the adhesive application area from the traditional double-faced tape punching method. By forming a recess in the frame and filling it with adhesive, the attachment function is separated from the punched tape structure, allowing reliable fixation without requiring large punched areas in the narrow picture-frame.
Solution Approach 2:
The invention transitions from a two-dimensional punched tape attachment to a three-dimensional recess-filled adhesive structure. The recess penetrates the frame thickness, creating a depth dimension that accommodates adhesive, thereby securing the backlight through vertical bonding rather than horizontal tape punching.
2Reliability
If double-faced tape is used for fixation, then the backlight can be attached to the liquid crystal display panel, but the tape width cannot be reduced below a predetermined value due to punching requirements
Solution Approach 1:
The invention replaces the mechanical punching and taping system with a chemical bonding system. Instead of using physical punched tapes that require minimum width for handling and punching, adhesive is applied in a recess to create bonds, eliminating the mechanical constraints on width reduction.
Solution Approach 2:
The invention changes the attachment mechanism from a mechanical tape-based system to a chemical adhesive-based system. This parameter change allows the attachment width to be reduced below the predetermined punching limit, as adhesive can be applied in small quantities within the recess without requiring large punched areas.
3Area of stationary object
If the picture-frame is narrowed to improve display area, then the overall device size is reduced, but the area for attaching components is insufficient
Solution Approach 1:
The invention nests the adhesive application space within the frame structure itself by forming a recess. The recess is embedded in the frame body, allowing adhesive to be applied in a contained space that does not protrude outward, thus maintaining the narrow picture-frame profile while providing sufficient attachment area.
Solution Approach 2:
The recess is formed in advance in the frame structure before assembly. This preliminary action creates a prepared adhesive application zone that guides the attachment process, making it easier to perform attachment work in the narrow picture-frame by providing a predetermined adhesive placement area.
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 solution ensures reliable fixation and integration of the backlight and liquid crystal display panel, eliminating the need for punched tape and allowing direct contact between the panel and frame surfaces, while accommodating narrow picture-frames.
Implementation Method 1
an adhesive fixing the circumferential edge portion of the liquid crystal display panel to the frame
Data Source
AI summary
A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate arranged so as to overlap the liquid crystal display panel, an optical sheet arranged between the liquid crystal display panel and the light guide plate, a frame accommodating the light guide plate therein and facing a circumferential edge portion of the liquid crystal display panel, and an adhesive fixing the circumferential edge portion of the liquid crystal display panel to the frame. The frame includes a recess penetrating an outer side surface and an upper surface facing the circumferential edge portion of the liquid crystal display panel. The adhesive is arranged in the recess.