Display Panel Testing Device Using Stacked Circuit Boards
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Solution Overview
Problem
Existing display panel testing methods often damage flexible printed circuits due to improper plugging/unplugging and contact with thimbles, leading to deteriorated imaging quality.
Innovation Solution
A testing device with a second circuit board and a pressing element, where the first circuit board with pins is stacked onto the second circuit board with test pads, ensuring direct electrical connection and close contact, eliminating the need for plugging/unplugging and reducing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flexible printed circuit is plugged in and unplugged from the testing system multiple times, then testing can be performed, but the flexible printed circuit is readily deformed or damaged
Solution Approach 1:
The testing device prepares test pads and conducting elements in advance on a circuit board, eliminating the need for repeated plugging and unplugging of the flexible printed circuit. The FPC is connected once and remains in place during testing, with electrical connections established through pre-positioned test pads and conducting elements.
Solution Approach 2:
The testing device introduces a circuit board with test pads and conducting elements as an intermediary between the testing system and the flexible printed circuit. This intermediary enables electrical testing without direct repeated connection/disconnection of the FPC, reducing mechanical stress and deformation.
2Ease of operation
If a thimble is used as a connector to contact the flexible printed circuit, then electrical connection can be established, but the flexible printed circuit is readily scraped or damaged
Solution Approach 1:
The testing device uses a circuit board with test pads as a disposable or replaceable interface instead of a durable thimble connector. The test pads provide electrical connection without the mechanical scraping action of thimble edges, reducing damage to the flexible printed circuit while maintaining ease of operation.
3Productivity
If the flexible printed circuit is repeatedly connected and disconnected, then testing procedures can be completed, but the imaging quality of the display panel is deteriorated
Solution Approach 1:
The testing system is configured with pre-positioned test pads and conducting elements that enable testing without repeated connection cycles. The flexible printed circuit is connected once in a controlled manner, and all necessary electrical tests are performed through the stable connection, preventing imaging quality deterioration while completing testing procedures.
Data Source
AI summary
A testing device is provided for testing a display panel including a first circuit board. The testing device includes a second circuit board and a pressing element. The second circuit board includes a main body, multiple test pads, multiple testing circuits and multiple conducting elements. The test pads are arranged on a first surface of the main body and corresponding to respective pins of the first circuit board. The testing circuits are formed on the second surface of the main body and corresponding to respective test pads. The first circuit board is stacked on the second circuit board. The testing circuits are electrically with respective pins through respective conducting elements and respective test pads. The pressing element presses a stacking region between the first circuit board and the second circuit board, thereby facilitating close contact between the first circuit board and the second circuit board.