Source Driver Temperature Sensor Calibration and Heat Sink
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Solution Overview
Problem
Temperature sensors in display devices face errors due to factors like ground voltage fluctuations and high internal temperatures caused by power consumption, leading to discrepancies between measured and actual temperatures.
Innovation Solution
A source driver with a calibrating circuit that generates a function between temperature and voltage based on multiple data points, considering different power consumption modes, to accurately calculate temperature data, and a heat sink plate for effective heat transfer between the panel and the source driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensor is mounted inside the source driver to detect temperature, then the temperature can be monitored for control purposes, but the internal temperature becomes higher than the actual temperature due to power consumption, causing measurement errors
Solution Approach 1:
A heat sink plate is introduced as an intermediary component between the display panel and the source driver. The heat sink plate conducts heat from the panel to the source driver, allowing the temperature sensor inside the source driver to indirectly measure the panel temperature rather than being affected by its own internal heat generation. This mediator separates the measurement function from the heat-generating function.
2Measurement precision
If the temperature sensor uses electrical characteristics to detect temperature, then temperature can be calculated from voltage or current changes, but discrepancies occur between the calculated temperature and the actual temperature due to ground voltage fluctuations and nonlinear characteristics
Solution Approach 1:
The system implements a feedback mechanism where the temperature sensor continuously monitors temperature, and the control circuit uses this information to adjust operating parameters. The temperature sensor output is fed back to the control circuit, which compensates for measurement errors by adjusting the relationship between electrical characteristics and temperature calculation based on detected temperature trends, thereby improving both accuracy and consistency.
Solution Approach 2:
The patent employs parameter changes by adjusting the electrical characteristics (voltage or current) supplied to the temperature sensor based on detected temperature conditions. The control circuit modifies operating parameters such as sensing voltage levels or measurement timing according to temperature ranges, compensating for nonlinear characteristics and ground voltage fluctuations to maintain accurate temperature calculation across different operating conditions.
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 solution reduces errors in temperature sensing by accounting for power consumption and heat transfer, providing accurate temperature measurements of the panel and source driver.
Implementation Method 1
The temperature sensor may detect the temperature using electrical characteristics that change with heat. The temperature sensor may output electrical characteristics such as current, which changes depending on temperature
Implementation Method 2
a heat sink plate for effective heat transfer between the panel and the source driver
Data Source
AI summary
An embodiment relates to a temperature sensor having a correction function and is able to reduce errors in measurement by the temperature sensor by calibrating a correlation between temperature and voltage.