Electro-Optical Device ESD Protection for Temperature Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Temperature-detecting elements in electro-optical devices are susceptible to surges and noise via the wiring substrate connected to the electro-optical panel, particularly when static electricity invades the driving IC, affecting their functionality.
Innovation Solution
An electro-optical device with a temperature-detecting element is configured with first and second wirings connected to an electrostatic protection circuit on a wiring substrate, where the third and fourth wirings do not overlap the driving IC, and includes electrostatic protection circuits within and outside the driving IC to protect the temperature-detecting element from surges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature-detecting element is electrically connected to the driving IC mounted on the wiring substrate, then the temperature detection function is achieved, but the temperature-detecting element becomes susceptible to surge and noise via the wiring substrate
Solution Approach 1:
An electrostatic protection circuit is introduced as an intermediary component between the temperature-detecting element and the driving IC. This protection circuit includes electrostatic protection elements (such as diodes or transistors) that are electrically connected to the third wiring and fourth wiring, forming a protective barrier that intercepts and dissipates static electricity surges before they can reach the temperature-detecting element, while allowing normal temperature detection signals to pass through unaffected
Solution Approach 2:
The electrostatic protection circuit is pre-configured on the wiring substrate before static electricity can invade the system. The protection elements are positioned and connected in advance to provide cushioning protection, ensuring that when static electricity occurs, the damage is already mitigated by the pre-established protective pathway
2Device complexity
If the third wiring and fourth wiring are routed near the driving IC, then the electrical connection is simplified, but the temperature-detecting element becomes more vulnerable to static electricity surge from the driving IC
Solution Approach 1:
The electrostatic protection circuit serves as a mediator that allows the wirings to remain in convenient positions while blocking harmful effects. The protection elements are inserted into the wiring path between the third/fourth wirings and the temperature-detecting element, enabling simplified wiring layout without compromising protection effectiveness
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
The configuration effectively shields the temperature-detecting element from static electricity surges, ensuring accurate temperature detection and high-quality image display by maintaining the integrity of the temperature-detecting element.
Implementation Method 1
the surge caused by static electricity invades the temperature-detecting element
Data Source
AI summary
In an electro-optical device, a first substrate used in an electro-optical panel is provided with a temperature-detecting element, and a wiring substrate connected to the first substrate is provided with third wiring electrically connected to first wiring of the first substrate, and fourth wiring electrically connected to second wiring of the first substrate. The wiring substrate is provided with an electrostatic protection circuit. The electrostatic protection circuit includes a first electrostatic protection circuit provided inside a driving integrated circuit, and a second electrostatic protection circuit including a capacitance element mounted on the wiring substrate. Accordingly, even when static electricity invades the third wiring and the fourth wiring from a connector side, the surge can be released via the electrostatic protection circuit.