LCD Power Supply Line Static Electricity Protection
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Solution Overview
Problem
Liquid crystal display devices are vulnerable to static electricity during manufacturing, which can damage circuits containing wirings and switching elements, and existing techniques are inadequate in effectively mitigating this issue.
Innovation Solution
The liquid crystal display device incorporates a power supply line and branch wiring configuration with projections and bridges that diffuse and dissipate static electricity, inducing discharges to projections acting as lightning rods, thereby controlling and reducing static electricity energy within the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wiring configurations are used in liquid crystal display devices, then the device structure remains simple, but the circuits are vulnerable to static electricity damage during manufacturing
Solution Approach 1:
The power supply line is divided into multiple segments with branch wirings extending from intermediate portions. This segmentation creates multiple discharge paths for static electricity, allowing the static charge to be distributed and dissipated through various projections and bridges rather than concentrating damage at a single location, thereby improving static electricity tolerance without requiring a completely new wiring architecture
Solution Approach 2:
Projections and bridges are introduced as intermediary structures between the power supply line and ground. These intermediaries act as controlled discharge paths that redirect static electricity away from sensitive circuits. The projections extend from the power supply line to serve as discharge points, while bridges connect these projections to ground, providing a safe pathway for static charge without directly exposing internal circuits to the full force of static discharge
2Reliability
If additional protective structures like projections and bridges are added, then static electricity damage is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The projections and bridges are merged with the existing power supply line structure rather than being separate additive components. The branch wirings are formed as integral parts of the power supply line configuration, and the projections extend directly from the power supply line at intermediate portions. This merging approach allows the protective structures to be created during the same fabrication process as the power supply line, avoiding additional manufacturing steps while still providing effective static electricity protection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively suppresses electric discharges and protects internal circuits and wirings from static electricity damage, enhancing the device's tolerance to static electricity and preventing potential destruction.
Implementation Method 1
a measure against static electricity is indispensable. For example, there is a possibility that the static electricity generated in the manufacturing process or invaded from the outside gives damage to circuits containing various wirings and switching elements in an active area
Data Source
AI summary
In one embodiment, an array substrate includes an active area in the shape of a rectangle, and first, second third and fourth end portions, surrounding the active area. A source control circuit is electrically connected with one end of the source lines drawn to the third end portion from the active area. First and second common terminals of a common potential are formed in the first end portion. A power supply line is electrically connected with the first common terminal and extends along the second, third and fourth end portions in this order, and connected with the second common terminal. A branch wiring is electrically connected with an intermediate portion of the electric power supply line and the source control circuit, and extending in the first direction.