Electro-optical Panel Temperature Detection Layout
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Solution Overview
Problem
In electro-optical devices, such as liquid crystal devices, the temperature detection element and electrostatic protection circuit are often separated from the pixel region, leading to inaccurate temperature monitoring due to increased leakage current, which affects the modulation and response characteristics of the liquid crystal layer.
Innovation Solution
The temperature detection element is placed closer to the pixel region, while the electrostatic protection circuit, including a semiconductor element, is positioned further away from the pixel region's center, reducing the impact of leakage current on temperature detection and maintaining accurate temperature monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature detection element and electrostatic protection circuit are provided in the corner of the substrate, then the electrostatic protection circuit is electrically coupled to the temperature detection element, but the temperature detection element is significantly separated from the pixel region, making it difficult to properly detect the temperature of the pixel region
Solution Approach 1:
The patent segments the functional components by separating the temperature detection element from the electrostatic protection circuit. The temperature detection element is positioned in the pixel region for accurate temperature sensing, while the electrostatic protection circuit is placed in the corner region for electrostatic protection, with electrical coupling between them through conductive structures.
Solution Approach 2:
The patent utilizes the substrate plane dimensions strategically by placing components in different regions (pixel region vs. corner region) and establishing electrical connections through conductive structures that span across the substrate, effectively using spatial arrangement to resolve the contradiction between detection accuracy and circuit protection.
2Measurement precision
If the temperature detection element and electrostatic protection circuit are provided in the vicinity of the pixel region, then the temperature detection element can detect the pixel region temperature, but the leakage current of the semiconductor element increases when the temperature increases, causing the output from the temperature detection element to fluctuate
Solution Approach 1:
The patent segments the temperature detection function from the electrostatic protection function, placing the temperature detection element in the pixel region for accurate sensing while positioning the semiconductor element of the electrostatic protection circuit in a cooler corner region. This spatial segmentation prevents the semiconductor element from being exposed to high temperatures that would cause leakage current and output fluctuations.
Solution Approach 2:
The patent applies local quality by creating different thermal environments for different components: the temperature detection element operates in the high-temperature pixel region where it needs to sense temperature, while the semiconductor element operates in the lower-temperature corner region where it maintains stable electrical characteristics without excessive leakage current.
3Measurement precision
If the temperature detection element is placed closer to the pixel region, then the temperature of the pixel region can be properly detected, but the electrostatic protection circuit may be affected by high temperature causing leakage current increase
Solution Approach 1:
The patent segments the system into two thermally distinct zones: the pixel region where the temperature detection element accurately senses high temperatures, and the corner region where the electrostatic protection circuit operates in a cooler environment, preventing temperature-induced leakage current while maintaining detection accuracy.
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 allows for precise temperature monitoring of the pixel region, mitigating the effects of temperature on image quality and reducing the complexity of calibration curves, thus improving the reliability and efficiency of temperature detection.
Implementation Method 1
a temperature detection element provided on the first substrate
Implementation Method 2
when the temperature of the pixel region increases, a leakage current of a semiconductor element, which is electrically coupled in parallel with the temperature detection element in the electrostatic protection circuit, increases
Data Source
AI summary
In an electro-optical device, a temperature detection element is provided on a first substrate having a pixel region, on which a plurality of pixel electrodes are provided, in a position overlapping a light shielding portion that is formed on a second substrate so as to surround the pixel region. Further, the first substrate is provided with an electrostatic protection circuit that includes a semiconductor element and is electrically coupled to the temperature detection element. The semiconductor element is disposed in a position which is farther distanced from the center of the pixel region than the temperature detection element is, and at which a temperature is lower than a temperature at a position in which the temperature detection element is provided.