Display Device Cable Connection Failure Detection
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Solution Overview
Problem
The enlargement of display panels leads to structural difficulties and increased costs for printed circuit boards and flexible wiring boards, resulting in poor cable connections that are difficult to detect, as larger boards are divided into multiple sections, increasing the number of cables and potential connection failures.
Innovation Solution
A display device with a main wiring board, a first wiring board featuring a feedback line, and a cable with forward and return conductors that connect the boards, allowing a control circuit to determine voltage input and initiate display only when connections are proper, facilitating the detection of connection failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display panel is enlarged, then the display size is improved, but the printed circuit board and flexible wiring board become structurally difficult to manage and cost increases substantially
Solution Approach 1:
The patent divides the wiring board system into multiple separate wiring boards (first wiring board, second wiring board, etc.) instead of using a single large board. Each wiring board is connected to the main wiring board via separate cables, making the system more manageable and easier to manufacture while supporting larger display panel sizes.
2Ease of manufacture
If the printed circuit board and flexible wiring board are divided into multiple sections, then the manageability is improved, but the number of cables increases and connection failures become more likely
Solution Approach 1:
The patent incorporates feedback lines in each cable that return to the main wiring board. These feedback lines enable the main wiring board to detect the connection status of each cable by monitoring voltage inputs, providing immediate feedback when a connection failure occurs, thus improving reliability despite having multiple cables.
3Ease of operation
If multiple cables are used to connect wiring boards, then the flexibility and manageability are improved, but the detection of connection failures becomes difficult
Solution Approach 1:
Each cable includes a feedback line that returns to the main wiring board, enabling the control circuit to monitor the connection status of each cable individually. When a cable is improperly connected, the control circuit detects the abnormal voltage input through the feedback line and can identify the specific failed cable, making connection failure detection straightforward despite having multiple cables.
4Productivity
If cables are improperly connected, then the assembly process becomes faster, but undetected anomalies persist in display panel operations
Solution Approach 1:
The patent implements preliminary detection of cable connection status before the display panel begins normal operation. The control circuit checks the voltage input through feedback lines from each cable, and only starts the display when proper connections are confirmed. This preliminary action prevents undetected anomalies from persisting in display operations.
Data Source
AI summary
A display device includes: a display panel; a main wiring board; a first wiring board that includes a first feedback line; and a first cable that is removably coupled to the main wiring board and the first wiring board. The main wiring board includes: a first output line; a first input line; a first circuit (a power supply circuit) that outputs a first voltage to the first output line; and a control circuit that is connected with the first input line. The first cable includes: a first forward conductor that directly or indirectly connects the first output line and the first feedback line; and a first return conductor that directly or indirectly connects the first input line and the first feedback line. The control circuit determines whether the first voltage is input, and when an input of the first voltage is determined, starts a display on the display panel.