Logic Board Assembly Connection Detection for Display Safety
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Solution Overview
Problem
The increasing size of connectors and pins between the driving board and liquid crystal display panels, combined with the wider Flexible Flat Cables (FFCs), makes it difficult to ensure proper assembly, leading to potential abnormal displays and risk of burning the driving chip due to skew or loose connections.
Innovation Solution
A logic board assembly with a connector and connection cable that includes a detecting device and control device, forming a detection loop to verify the connection state, turning on or off the power chip based on good or abnormal contact, thereby preventing abnormal displays and chip damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the connector size and pin count are increased to support large-size high-resolution liquid crystal displays, then the display resolution and size are improved, but the assembly difficulty increases and the risk of abnormal connection rises
Solution Approach 1:
The patent implements preliminary detection of connection state before power is supplied to the display system. The detection device checks whether the connection cable is properly connected to the connector before enabling power chip operation, preventing assembly errors from causing damage to expensive components.
Solution Approach 2:
The patent introduces an intermediary detection device and control device between the connection cable and the power chip. This intermediary system acts as a gatekeeper, verifying proper connection through detection loops before allowing power flow, thus protecting the high-resolution display system from assembly mistakes.
2Adaptability or versatility
If the FFC connection cable is made wider to support more pins, then the connectivity capacity is improved, but the ease of assembly deteriorates and the risk of insertion errors increases
Solution Approach 1:
The patent implements a feedback mechanism where the detection device continuously monitors the connection state of the wide FFC cable and communicates this information to the control device. The system provides real-time feedback on whether the cable is properly connected, allowing operators to correct assembly errors before they cause damage.
Solution Approach 2:
Before the wide FFC cable is used to transmit high-capacity signals, the system performs preliminary detection to ensure proper connection. This preliminary action prevents the complexity of the wide cable from becoming a source of assembly errors that could damage the display system.
3Adaptability or versatility
If manual assembly is used for connecting the connector and connection cable, then the flexibility and adaptability are improved, but the reliability of proper connection deteriorates due to inability to judge assembly quality by naked eye
Solution Approach 1:
The patent enables the system to perform self-verification of connection quality. The detection device automatically checks whether the manual assembly is correct by testing electrical continuity through the detection loop, eliminating the need for visual inspection by assembly workers and ensuring consistent reliability regardless of operator skill level.
Solution Approach 2:
The patent replaces the mechanical/visual inspection method with an electrical detection system. Instead of relying on operators to visually verify connection quality, the system uses electrical continuity testing through detection loops to objectively determine whether the manual assembly is correct, significantly improving connection reliability.
4Device complexity
If no detection mechanism is implemented, then the device complexity is reduced, but the risk of display abnormality and chip burning increases
Solution Approach 1:
The patent implements a simple preliminary detection step that checks connection status before power is applied. This minimal detection mechanism uses basic electrical continuity testing through detection loops to identify potential problems before they can cause expensive damage, providing protection with minimal added complexity.
Solution Approach 2:
The detection and control devices act as a protective cushion before harmful effects can occur. By detecting improper connections in advance and preventing power supply, the system cushions against the potential damage to the liquid crystal display panel and driving chip, adding minimal complexity to prevent major failures.
Data Source
AI summary
The present disclosure discloses a logic board assembly, a display device, and a liquid crystal display, the logic board assembly comprising a connection cable, a printed circuit board, a connector disposed on the printed circuit board, a timing controller, and a power chip, wherein the connection cable is pluggably connected to the connector, and the connection cable has a first state in good contact with the connector and a second state in abnormal contact therewith; the timing controller includes a detecting device and a control device, the detecting device configured to detect a state of the connector, the control device electrically connected to the power chip of the logic board assembly; when the connection cable is in the first state, the control device controls the power chip to be turned on, and when in the second state, the control device controls the power chip to be turned off.