Adhesive Layer Design for Thinner Display Devices
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in reducing the thickness and narrowing the frame of the backlight unit due to the structural limitations of the mold frame, making it difficult to meet the demand for thinner and narrower displays.
Innovation Solution
A display device design that includes a cover panel with an adhesive layer having a first area for fixing the display panel and a second area extending outward, which also fixes part of the case, allowing for a thinner and more compact structure by using a single adhesive layer for both the display panel and the case, and a method of manufacturing this device involving provisional and thorough curing of the adhesive layer with ultraviolet rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a mold frame structure is used to support the backlight unit components, then the structural integrity is maintained, but the thickness and frame width cannot be further reduced
Solution Approach 1:
The patent removes the mold frame from the backlight unit structure, extracting the supporting function to the case and adhesive layer instead, thereby eliminating the thickness and complexity constraints imposed by the mold frame
Solution Approach 2:
The case is designed to serve multiple functions: it contains the backlight unit components, provides structural support, and serves as a mounting surface for the adhesive layer, eliminating the need for a separate mold frame
2Manufacturing precision
If separate adhesive layers are used for fixing the display panel and the case, then the positioning precision is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent combines the display panel fixing function and case mounting function into a single adhesive layer with two distinct areas, simplifying the manufacturing process while maintaining positioning precision through the differentiated first and second areas
Solution Approach 2:
The single adhesive layer is segmented into a first area for display panel fixation and a second area for case mounting, allowing each area to perform its specific function while using the same adhesive material and application process
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 enables further reduction in thickness and narrowing of the frame, reducing manufacturing costs and simplifying the manufacturing process while maintaining the structural integrity and optical performance of the display device.
Implementation Method 1
irradiating the adhesive layer with an ultraviolet ray and provisionally curing the adhesive layer; irradiating the adhesive layer with an ultraviolet ray through the cover panel and thoroughly curing the adhesive layer
Data Source
AI summary
According to one embodiment, a display device includes a cover panel, a display panel opposed to the cover panel, an adhesive layer provided between the cover panel and the display panel and attaching the display panel to the cover panel, the adhesive layer including a first area to which the display panel is fixed and a second area located further outward than an outer periphery of the display panel, a backlight unit opposed to the display panel, and a case containing the display panel and the backlight unit, at least a part of the case being fixed to the cover panel by the second area of the adhesive layer.