Touch Screen Panel Dummy Patterns Prevent Light Leakage
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Solution Overview
Problem
Display devices with touch screen panels suffer from light leakage due to bubbles generated at the contact portion between the display panel and the touch screen panel, caused by poor adhesion, which blurs the boundary between the active and light shielding areas.
Innovation Solution
Incorporating dummy patterns in the third light shielding area of the touch screen panel, which extends beyond the active area and overlaps with the first light shielding area of the display panel, to prevent light leakage by shielding any diffused light from bubbles, using materials like metal or alloys for effective light shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touch screen panel is attached to a display panel using adhesive, then the touch screen panel can be securely fixed, but bubbles may form at the contact portion causing light leakage
Solution Approach 1:
The patent introduces a dummy pattern in the third light shielding area specifically to address light leakage in the bubble-prone region. This local modification doesn't change the overall adhesive bonding approach but adds targeted light shielding capability where bubbles are most likely to form, thus maintaining adhesion reliability while preventing light leakage locally.
Solution Approach 2:
The dummy pattern is designed in advance to counteract the potential harmful effect of light leakage from bubbles. By pre-positioning this light shielding structure in the third light shielding area, the patent proactively prevents light leakage before bubbles can cause display quality degradation, without affecting the adhesive bonding process.
2Ease of operation
If the touch screen panel extends beyond the active area, then the touch functionality is improved, but light leakage from bubbles becomes more visible
Solution Approach 1:
The dummy pattern is specifically positioned in the third light shielding area where the touch screen panel extends beyond the active area. This localized light shielding structure addresses light leakage in the extended touch region without interfering with the touch functionality, as it only affects the light path and not the touch sensing capability.
Solution Approach 2:
The patent addresses the light leakage problem by adding a structural element (dummy pattern) in a different spatial dimension - the third light shielding area that overlaps with the first light shielding area. This dimensional approach allows light shielding without interfering with the touch screen's extended functionality.
3Manufacturing precision
If light shielding areas are expanded to prevent light leakage, then display quality improves, but the device structure becomes more complex
Solution Approach 1:
The dummy pattern is merged with the existing third light shielding area of the touch screen panel, utilizing the overlapping region between the first and third light shielding areas. This integration approach prevents light leakage without requiring separate additional structures, thus improving display quality while minimizing structural complexity.
Solution Approach 2:
The third light shielding area serves multiple functions: it provides the standard light shielding for the touch screen panel and simultaneously acts as the location for the dummy pattern to prevent light leakage from bubbles. This multi-functionality reduces the need for additional dedicated structures, maintaining simplicity while improving display quality.
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 dummy patterns effectively prevent light leakage, improving display quality by maintaining a clear boundary between the active and light shielding areas, even when bubbles form, thereby enhancing user experience.
Implementation Method 1
Incorporating dummy patterns in the third light shielding area of the touch screen panel, which extends beyond the active area and overlaps with the first light shielding area of the display panel, to prevent light leakage by shielding any diffused light from bubbles
Data Source
AI summary
A display device with a panel for preventing a light leakage is disclosed. The display device with the panel includes a display panel including an active area, on which information is displayed, and a first light shielding area positioned outside the active area and a panel disposed on the display panel. The panel includes a touch area having a size wider than the active area, a second light shielding area positioned outside the touch area, and a third light shielding area ranging from a start position of the first light shielding area to a start position of the second light shielding area. At least one dummy pattern is disposed in the third light shielding area of the panel.