Display Panel Data Line Inspection for Border Dark Lines
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Solution Overview
Problem
Existing display panel inspection methods face difficulties in detecting dark lines at the borders due to their similarity with the black matrix, leading to increased complexity and time consumption.
Innovation Solution
The display panel design includes first-type and second-type data lines, where the second-type data lines are closer to the center and connected to the first-type data lines, allowing for the detection of dark lines by inspecting sub-pixels in the center, thereby identifying border dark lines without the need for additional testing images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a frame testing image is displayed at the borders of the display panel to detect dark lines, then dark line detection capability is improved, but the inspection time and configuration complexity increase
Solution Approach 1:
Instead of displaying the testing image at the border area where dark lines need to be detected, the patent inverts the approach by displaying the testing image at the center area and using signal transmission through data lines to indirectly detect border dark lines. This inversion resolves the contradiction by enabling border detection without occupying border display space or requiring extended inspection time.
Solution Approach 2:
The patent introduces data lines as intermediaries that transmit voltage signals from the center testing image display area to the border areas. By monitoring the voltage signals transmitted through these data lines, the system can detect dark lines at the borders indirectly, thus avoiding the need to directly display testing images at the borders and reducing inspection time.
2Measurement precision
If a frame testing image is displayed at the borders of the display panel to detect dark lines, then dark line detection capability is improved, but the configuration complexity increases
Solution Approach 1:
The patent inverts the conventional approach by displaying the testing image at the center rather than the border. This simplifies the configuration process as the center area is more accessible and easier to address, while still enabling border dark line detection through the data line signal transmission mechanism.
Solution Approach 2:
By using data lines as intermediaries to transmit testing signals from the center to the border areas, the patent reduces the complexity of directly configuring and managing testing images at multiple border locations. The intermediary data lines simplify the signal distribution architecture.
3Measurement precision
If the first-type data line is connected to the second-type data line for signal transmission, then the inspection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent makes the data lines serve multiple functions: they simultaneously transmit display signals during normal operation and transmit testing voltage signals during inspection. This multi-functionality allows the same data line infrastructure to be used for both display and inspection purposes, adding inspection capability without proportionally increasing device complexity.
Solution Approach 2:
The inspection system utilizes the existing data line infrastructure to perform self-inspection. The data lines that already exist for display purposes are repurposed to carry testing signals, allowing the display panel to inspect itself without requiring separate dedicated testing infrastructure, thus improving inspection accuracy while minimizing additional complexity.
Data Source
AI summary
A display panel, a display device and an inspection method are provided. The display panel comprises a plurality of scanning lines, a plurality of data lines including a plurality of first-type data lines and a plurality of second-type data lines, and a plurality of sub-pixels arranged in an array. The second-type data lines are closer to a center of the display panel than the first-type data lines along a first direction. The first-type data line is connected to at least one second-type data line, and the connected first-type data line and the at least one second-type data line are connected to the sub-pixels having a same color in a same sub-pixel row, respectively. The first-type data line receives a voltage signal from an external circuit, and the at least one second-type data line receives the voltage signal from the connected first-type data line.