Overlapping Resistance Lines for Antistatic Circuit Area Reduction
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Solution Overview
Problem
Large-sized display devices face increased defect rates and decreased productivity and reliability due to the number of pixels, and tiled display devices suffer from visible seams that disrupt the sense of immersion.
Innovation Solution
Incorporating first and second resistance lines connected in series and overlapping each other to minimize the arrangement area of antistatic circuits, reducing the visibility of seams between display devices and enhancing pixel design areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of display device is increased, then the display area is enlarged, but the defect rate of light emitting elements increases and productivity decreases
Solution Approach 1:
The display device is divided into multiple sub-display regions arranged in a matrix, with each region containing multiple pixels. This segmentation allows the large display area to be constructed from smaller functional units, reducing the defect rate while maintaining overall display area.
2Area of stationary object
If multiple display devices are connected to form tiled display device, then the display area is enlarged, but visible seams appear between devices
Solution Approach 1:
The non-display areas (bezel areas) between adjacent display devices are extracted and minimized, allowing the display areas to extend closer together. This reduces the visibility of seams and improves image immersion across the tiled display device.
Solution Approach 2:
The boundary portions between adjacent display devices are designed with specific structural characteristics (such as reduced thickness or integrated coupling structures) to minimize their visual impact, making the seams less noticeable and improving overall image continuity.
3Reliability
If antistatic circuits are arranged in display area, then electrostatic protection is provided, but the arrangement area for pixels is reduced
Solution Approach 1:
The resistance lines providing electrostatic protection are arranged to overlap with each other in the thickness direction of the display device, rather than occupying separate planar areas. This three-dimensional arrangement allows both electrostatic protection and maximum pixel arrangement area to be achieved.
Data Source
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AI summary
A display device includes a substrate including a display area including pixels, and a non-display area around the display area, a pad part in the non-display area, antistatic circuits between the pad part and the pixels, respectively, a first resistance line connected to the pad part and to the antistatic circuits, a second resistance line connected to the first resistance line and overlapping the first resistance line, and a fan-out line connected between the second resistance line and a respective one of the pixels.