Display Panel Narrow Frame Sealing with Dummy Structure
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Solution Overview
Problem
Existing liquid crystal display panels face challenges in reducing the frame width while maintaining adequate adhesive strength of the sealing material, as the width of the sealing material in the narrow frame region is restricted by its width in the wide frame region, leading to difficulties in achieving a narrower frame and sufficient adhesive strength.
Innovation Solution
A display panel design that includes a dummy structure in the frame region to compress the sealing material, allowing it to have a greater width in the wide frame region and a suitable width in the narrow frame region, ensuring reliable adhesive strength without increasing manufacturing steps, by using a dummy structure made of the same material as the photo spacer or color layer, and through grooves or recessed grooves to increase contact area and prevent peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the sealing material width is reduced to narrow the frame, then the frame width is reduced, but the adhesive strength of the sealing material is reduced
Solution Approach 1:
The patent applies different sealing material widths to different frame regions: a first width in the first frame region and a second width (greater than the first) in the second frame region. This local differentiation allows the frame to be narrowed in the first region while maintaining sufficient adhesive strength in the second region, resolving the contradiction between frame width reduction and adhesive strength maintenance.
2Strength
If the sealing material width is kept constant to maintain adhesive strength, then the adhesive strength is sufficient, but the frame width cannot be narrowed
Solution Approach 1:
The patent implements local quality by specifying that the sealing material has a first width in the first frame region and a second width (greater than the first) in the second frame region. This allows different portions of the frame to have different sealing material widths optimized for their specific functions, enabling frame narrowing where possible while maintaining strength where needed.
Solution Approach 2:
The patent segments the frame region into a first frame region and a second frame region with different sealing material width requirements. This segmentation allows independent optimization of each region's sealing material width, resolving the contradiction by applying appropriate widths to appropriate segments rather than using a uniform width throughout.
3Length of stationary object
If the sealing material width in the wide frame region is reduced to match the narrow frame region, then the frame can be narrowed, but the adhesive strength in the wide frame region is reduced
Solution Approach 1:
The patent applies local quality by specifying that the sealing material has a first width in the first frame region and a second width (greater than the first) in the second frame region. This allows the wide frame region (second frame region) to maintain its greater sealing material width for sufficient adhesive strength, while the narrow frame region (first frame region) can have a reduced width.
Solution Approach 2:
The patent segments the frame into regions with different sealing material width requirements, allowing the wide frame region to maintain its greater sealing material width for sufficient adhesive strength while the narrow frame region can be reduced.
Data Source
AI summary
A liquid crystal display panel (1) includes a TFT substrate (10), a CF substrate (20) facing the TFT substrate (10), a frame region around a display region (D), and a sealing material (26) in the frame region. The frame region includes a wide frame region (F1) adjacent to a terminal region (T), and a narrow frame region (F2) having a smaller width than the wide frame region (F1). A dummy structure (2) overlapping the sealing material (26) as viewed from above is in the CF substrate (20) in the wide frame region (F1).