Resin Chassis Steps Prevent Foreign Matter in Display Devices
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Solution Overview
Problem
Large display devices with protection panels face image quality failures due to foreign matter intrusion through gaps between the chassis and protection panels, leading to increased costs and complexity in adhesive tape design and application.
Innovation Solution
A display device design featuring a resin chassis with steps of equal or less than the adhesive member's thickness, where the adhesive member is placed below the step and a wall at the step's upper level separates it from the display panel, creating a narrow clearance to prevent foreign matter intrusion, allowing for a simplified adhesive member shape and reduced waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complicated-shaped adhesive member is used to prevent foreign matter intrusion, then foreign matter prevention is improved, but manufacturing cost and workability deteriorate
Solution Approach 1:
The invention introduces a step structure that creates a vertical dimension (height difference) between the adhesive member and the display panel. This vertical separation forms a wall that blocks foreign matter intrusion without requiring the adhesive member itself to have a complicated horizontal shape, thus maintaining simple adhesive member geometry while achieving foreign matter prevention.
Solution Approach 2:
The space between the adhesive member and display panel is segmented into a sealed region and a non-sealed region by the step structure. The sealed region prevents foreign matter intrusion, while the non-sealed region allows for simple adhesive member shape and easy manufacturing. This spatial segmentation resolves the contradiction between reliability and ease of manufacture.
2Reliability
If a complicated-shaped adhesive member is used to prevent foreign matter intrusion, then foreign matter prevention is improved, but adhesive material waste increases
Solution Approach 1:
By utilizing the vertical dimension through the step structure, the invention achieves foreign matter prevention through height difference rather than through complicated horizontal shaping of the adhesive member. This allows the adhesive member to maintain a simple shape with minimal material, preventing waste while ensuring reliability.
3Ease of manufacture
If the adhesive member structure is simplified, then manufacturing cost and workability are improved, but foreign matter intrusion increases
Solution Approach 1:
The step structure acts as an intermediary element between the simple adhesive member and the display panel. It mediates the contradiction by providing the foreign matter blocking function without requiring the adhesive member to be complicated, thus enabling both simplified manufacturing and reliable foreign matter prevention.
4Ease of manufacture
If a simple-shaped adhesive member is used, then manufacturing cost is reduced, but image quality deteriorates due to foreign matter intrusion
Solution Approach 1:
The step structure introduces a vertical dimension that creates a wall for foreign matter blocking, enabling the use of simple-shaped adhesive members without compromising image quality. This resolves the contradiction by achieving both cost reduction and image quality maintenance through spatial reconfiguration.
Data Source
AI summary
A display device prevents a foreign material from entering from a gap formed between an adhesive member and a chassis, said gap being formed due to having a structure simplified. The upper surface of a resin chassis, said upper surface facing a touch panel, is provided with steps having a height equal to a thickness of a double-sided tape or less. The double-sided tape is disposed in a region, which is at the lower level of the steps. In a region where and end portion of the double-sided tape is disposed, wall at a level equivalent to the upper level of the steps is provided such that double-sided tapes and a display device are spatially separated from each other.