Display Panel Signal Line Layering for Sensor Area Uniformity
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Solution Overview
Problem
The integration of sensors, such as camera sensors, in the active area of display panels complicates the arrangement of signal lines and subpixels, leading to non-uniform image display and potential degradations in luminance due to increased load and structural differences around the sensor area.
Innovation Solution
The implementation of a boundary area around the sensor area allows for the efficient arrangement of signal lines on different layers, reducing the load on data lines and preventing luminance degradations by distributing them in a curved pattern, thereby maintaining uniformity of images displayed around the sensor area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a sensor area is disposed in the active area of the display panel, then the bezel area can be reduced, but it becomes difficult to arrange display operation components (signal lines and subpixels) in the active area
Solution Approach 1:
The display panel is divided into multiple layers, with signal lines (gate lines and data lines) arranged on different layers. This segmentation allows signal lines to be distributed across multiple layers, reducing the complexity of arranging all components within the active area while maintaining a reduced bezel design.
Solution Approach 2:
The patent utilizes the vertical dimension by disposing signal lines on different layers (e.g., gate lines on a first layer, data lines on a second layer). This multi-layer approach resolves the spatial conflict between sensor area and signal line arrangement by transitioning from a two-dimensional layout to a three-dimensional structure.
2Area of stationary object
If a sensor area is disposed in the active area, then the bezel area is reduced, but the structure of signal lines and subpixels around the sensor area must differ, degrading display quality
Solution Approach 1:
Signal lines are segmented and assigned to different layers: gate lines on a first layer and data lines on a second layer. This segmentation allows each type of signal line to be optimized independently, maintaining uniform image display quality around the sensor area while accommodating the sensor presence.
Solution Approach 2:
The patent applies different structural configurations to different regions: signal lines are arranged in a first pattern in areas not adjacent to the sensor area, and in a second pattern in areas adjacent to the sensor area. This local adaptation maintains manufacturing precision and image uniformity while accommodating the sensor's presence.
3Ease of operation
If data lines are extended around the sensor area, then subpixels around the sensor can be driven, but the increased length increases load and causes luminance degradation
Solution Approach 1:
Data lines are disposed on a second layer at a different vertical level, increasing the vertical distance between data lines and gate lines. This multi-layer arrangement reduces parasitic capacitance and electrical load on data lines, preventing luminance degradation while maintaining the ability to drive subpixels around the sensor area.
Solution Approach 2:
The patent introduces an intermediate layer structure where data lines are positioned on a separate layer from gate lines. This intermediate positioning acts as a mediator that reduces electrical interference and load between signal lines, thereby reducing energy loss and preventing luminance degradation in subpixels around the sensor area.
Data Source
AI summary
A display device can include a display panel having an active area where a plurality of subpixels are disposed over a substrate, at least one hole area surrounded by the active area, a boundary area disposed between the at least one hole area and the active area, a first data line disposed on the active area and the boundary area, and configured to supply a data voltage to a first group of the plurality of subpixels and a second data line disposed on the active area and the boundary area, and configured to supply the data voltage to a second group of the plurality of subpixels. Also, a vertical distance between the second data line and the substrate is different from a vertical distance between the first data line and the substrate.