Display Panel Frame Cell Test Structure for Narrow Bezel Design
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Solution Overview
Problem
Large-size display panels with narrow frames face challenges in visual experience due to framing issues and require additional processes for cell testing, which increases costs and time.
Innovation Solution
A display panel with a cell test structure positioned at the frame, featuring cell test portions, connection lines, a first shorting bar, and active switches, allowing for simultaneous control and reducing the need for complex settings and excess processes, while utilizing existing electrical components to minimize space and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the frame of the display panel is narrowed to improve visual experience, then the visual quality is improved, but the space for cell testing is reduced and the testing process becomes more complex
Solution Approach 1:
The display panel is divided into a display region and a frame region, with the cell test structure specifically positioned in the frame region. This segmentation allows testing functions to be isolated in a dedicated area without interfering with the display region, enabling narrow frame design while maintaining testing capabilities through separate functional zones.
Solution Approach 2:
The cell test structure incorporates multiple functional elements (cell test portions, connection lines, shorting bars, and active switches) that serve both testing purposes and can be integrated with the display panel's existing structure. The active switches can be controlled by existing driving chips, allowing the testing structure to utilize existing electrical components and wiring arrangements, reducing overall system complexity.
2Reliability
If the cell test structure is added to the display panel to enable testing, then the testing capability is improved, but the process complexity and time are increased
Solution Approach 1:
The cell test structure is pre-integrated into the display panel during manufacturing, with cell test portions, connection lines, and active switches prepared in advance. This preliminary setup eliminates the need for separate testing equipment and complex external connections, allowing rapid testing to be performed directly on the panel without additional preparation time.
Solution Approach 2:
The cell test structure is designed to be self-contained within the display panel, with all necessary testing components (power supply through cell test portions, signal routing through connection lines, and control through active switches) integrated into the panel itself. This self-service design eliminates dependency on external testing equipment and complex setup procedures, significantly reducing testing time and process complexity.
3Ease of operation
If the active switches are disposed on connection lines to control testing, then the testing control is improved, but the space occupation is increased
Solution Approach 1:
The active switches are positioned at specific locations along the connection lines where they are most effective for controlling cell testing. Rather than distributing switches uniformly across the entire panel, they are locally concentrated in the frame region where they can control multiple connection lines simultaneously. This localized placement minimizes space occupation while maintaining effective control capability.
Solution Approach 2:
The connection lines and active switches are arranged in a planar configuration within the frame region, utilizing the two-dimensional space efficiently. The connection lines extend in one dimension while active switches are positioned at strategic points, creating a compact layout that controls multiple lines without requiring additional vertical or lateral space beyond the frame region.
Data Source
AI summary
A display panel is provided. The display panel includes a cell test structure. The cell test structure is positioned at a frame of the display panel. The cell test structure includes cell test portions for supplying electric power to the cell test structure, and multiple connection lines for connecting conductive lines of a display region of the display panel. The cell test structure also includes a first shorting bar disposed and connected between the cell test portions and the connection lines. The cell test structure further includes multiple active switches disposed on the connection lines. The active switches are electrically connected to the cell test portions.