Bent Display Substrate with Rotatable Supporter for Bezel Reduction
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Solution Overview
Problem
Existing display devices have a significant bezel region that serves as non-display area, which limits their ability to provide a wider display area while maintaining a compact design.
Innovation Solution
A display device and manufacturing method that incorporates a supporting member with a rotatable supporter to bend the display substrate's outer periphery, allowing a dummy emission layer to be positioned in the non-display area, thereby minimizing the bezel region by securing the substrate in a bent state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a flat display substrate is used with conventional structure, then the device structure is simple and easy to manufacture, but the bezel region is large which limits the display area
Solution Approach 1:
The display substrate is transformed from a static flat structure to a dynamic bent structure. The substrate includes a first region (display area) and a second region (non-display area) that is bent along a bending line. This dynamic configuration allows the second region to be folded upward, minimizing the bezel region width while maintaining structural integrity and enabling larger display area within the same device footprint.
Solution Approach 2:
The invention transitions from a two-dimensional flat display substrate to a three-dimensional bent structure. By introducing a bending line and folding the second region upward, the substrate utilizes the third dimension (vertical direction) to reduce the horizontal bezel width. This dimensional change allows the display area to expand while keeping the device thickness and overall size constrained.
2Area of moving object
If the display substrate is bent to minimize bezel region, then the display area is increased, but the structural integrity and reliability of the emission layer may be compromised
Solution Approach 1:
The display substrate is segmented into two distinct regions: a first region corresponding to the display area and a second region corresponding to the non-display area. The segmentation occurs at a bending line where the second region is bent upward. This segmentation allows the emission layer to be discontinuously disposed, with the first emission layer on the first region and a dummy emission layer on the second region, isolating the functional emission area from the bent structural region to maintain reliability.
Solution Approach 2:
A dummy emission layer is introduced as an intermediary element on the bent second region of the display substrate. This dummy emission layer serves as a mediator that maintains the structural continuity and adhesion of the emission layer system during the bending process, while the discontinuous disposal ensures that the functional first emission layer remains unaffected by the mechanical stress of bending, thus preserving structural integrity.
3Length of stationary object
If a rotatable supporter is added to maintain the bent state of the substrate, then the bezel region is minimized, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
A rotatable supporter is introduced to maintain the bent configuration of the second region of the display substrate. The supporter features a curved supporting surface that corresponds to the bent shape of the substrate, providing continuous contact and support along the bending line. This curvature-based support system enables the substrate to maintain its minimized bezel configuration while allowing rotational adjustment, balancing structural requirements with manufacturing feasibility.
Data Source
AI summary
A display device includes: a supporting member including a body, and a supporter rotatably coupled to a side surface of the body; a display substrate on the supporting member, the display substrate including a first region, and a second region at an outer periphery of the first region; an emission layer on the first region and the second region of the display substrate; a polarizer on the emission layer and on the first region of the display substrate; a touch panel on the polarizer; and a window on the touch panel. The supporter is configured to support the second region of the display substrate such that the second region of the substrate is in a bent-state in a non-display region of the device.