Tiling Display Device Bezel Reduction via Substrate Integration
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Solution Overview
Problem
Large area display devices face challenges in yield and manufacturing costs due to limited fabrication capabilities, and tiling display devices have bezel areas that reduce aesthetic appeal and user immersion by creating a sense of disconnection.
Innovation Solution
A tiling display device comprising multiple display modules with a substrate, signal lines, open holes, filling layers, and circuit boards, where the signal lines and circuit boards are integrated within the display area to minimize bezel space, and the open holes are used to connect these components electrically without additional bezel allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display modules are combined to form a large area display device, then the display area is increased, but the bezel area increases creating a sense of disconnection and reducing user immersion
Solution Approach 1:
The invention extracts the circuit board from the traditional bezel area location and relocates it to the back surface of the substrate. This removes the harmful bezel elements from the front view, eliminating the visual disconnection while preserving all necessary circuit functions. The circuit board is taken out from its conventional position and repositioned to achieve the desired aesthetic effect.
Solution Approach 2:
The invention moves the circuit board from the two-dimensional plane of the front display surface to the third dimension by positioning it on the back surface of the substrate. This dimensional transition allows the circuit board to be hidden from the front view, eliminating the bezel area's harmful visual impact while maintaining functional integrity.
2Area of stationary object
If signal lines are positioned within the display area, then the bezel area is reduced, but electrical connection to the circuit board becomes more complex
Solution Approach 1:
The invention introduces an open hole as an intermediary structure that penetrates the substrate, allowing signal lines to pass through from the front surface to the back surface where the circuit board is located. This intermediary element simplifies the electrical connection by providing a direct pathway, avoiding the need for complex lateral routing through the substrate thickness.
Solution Approach 2:
The signal lines are nested within the open hole structure, which is embedded in the substrate. The filling layer is nested within the open hole, and the signal lines pass through this nested structure to establish electrical connection. This nesting arrangement compactly integrates multiple functional elements in a space-efficient manner.
3Area of stationary object
If the circuit board is positioned on the back surface of the substrate, then the front bezel area is minimized, but the electrical connection path through the substrate becomes more challenging
Solution Approach 1:
The open hole structure serves itself by providing a pre-formed, precisely positioned pathway through the substrate. The filling layer automatically fills the open hole, creating a self-aligned electrical connection path that eliminates the need for complex post-alignment procedures. The structure is self-sufficient in establishing the electrical connection between front and back surfaces.
Data Source
AI summary
A tiling display device includes a plurality of display modules arranged on one plane. The display module includes a substrate, a signal line, an open hole, a filling layer, and a circuit board. The substrate has a display area in which subpixels are defined. The signal line is positioned on the top surface of the substrate within the display area to deliver a predetermined signal to the subpixels. The open hole is provided to penetrate the substrate within the display area. The filling layer fills the open hole. The circuit board is positioned on the back surface of the substrate and electrically connected to the signal line through the filling layer.