Source Driver Crack Detection Using Sub-Pixel Illumination
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Solution Overview
Problem
Existing display devices lack an intuitive method for accurately detecting cracks in display panels, which can lead to defects and shipping issues due to moisture penetration.
Innovation Solution
A display device with a panel crack detection circuit that applies a driving voltage to a detection line on the display panel, using detection nodes connected to sub-pixels to assess the presence of cracks based on illumination status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual test procedure is used for crack detection, then the detection can be performed, but the process is not intuitive and errors may occur
Solution Approach 1:
The display panel performs self-detection by utilizing its own sub-pixels and data lines as detection elements. The panel structure itself serves the dual function of display and crack detection, eliminating the need for external manual testing equipment and procedures.
Solution Approach 2:
The patent replaces manual mechanical inspection with an automated electrical detection system. By applying voltage through data lines and measuring current changes, the system substitutes physical manual testing with automated electrical measurement, improving both accuracy and intuitiveness.
2Measurement precision
If crack detection is performed manually, then cracks can be identified, but the process is complex and time-consuming
Solution Approach 1:
The data lines and sub-pixels serve multiple functions: they act as both display elements and detection elements. This multi-functionality eliminates the need for separate dedicated detection hardware, simplifying the overall system while maintaining precise crack detection capability.
Solution Approach 2:
The detection circuit is integrated into the panel during manufacturing, performing preliminary detection setup. The voltage application and current measurement capabilities are pre-configured within the panel structure itself, enabling immediate use without complex external test procedures.
3Ease of manufacture
If no crack detection system is implemented, then the device structure remains simple, but defective panels may be shipped causing issues
Solution Approach 1:
The patent merges the crack detection function with the existing display structure by utilizing data lines and sub-pixels for dual purposes. This integration adds detection capability without requiring separate dedicated detection components, maintaining manufacturing simplicity while improving quality control.
Solution Approach 2:
The display panel performs self-diagnosis through its own internal structure. The panel can detect its own cracks using integrated detection circuits that utilize existing data lines and sub-pixels, enabling quality control without adding complex external testing equipment.
Data Source
AI summary
Disclosed are a source driver and a method of detecting crack of a display panel. A source driver may comprise a first circuit configured to apply first data to data lines connected to sub-pixels of a display panel to charge a first driving voltage; and a second circuit formed on the display panel that applies the first driving voltage to a detection line formed on the display panel to detect the presence of cracks in the display panel based on the illumination status of the sub-pixels, wherein the detection line includes a first detection node and a second detection node formed on one side of the display panel along its extension direction, wherein the first detection node is connected to data lines of the first and third sub-pixels, and wherein the second detection node is connected to data line of the second sub-pixel.