Display Panel Temperature Estimation Using Sensor Data Compensation
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Solution Overview
Problem
In liquid crystal display devices, there is a time lag between the temperature change of the display panel and the output value of the temperature sensor, leading to inaccuracies in temperature estimation due to the sensor's distance from the panel and the heat source.
Innovation Solution
A display device with a control unit that calculates the display panel's temperature using current and prior output values from multiple temperature sensors, including one near the heat source and another for environmental temperature, to compensate for time lags and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the temperature sensor is disposed away from the liquid crystal display panel, then it is easier to mount the sensor, but the time lag between temperature change of the panel and sensor output increases
Solution Approach 1:
The control unit performs preliminary calculations using stored past temperature data and current sensor output to estimate what the panel temperature should be now, compensating for the time lag before gray scale correction is applied
Solution Approach 2:
The control unit acts as an intermediary that processes the relationship between sensor output and panel temperature through calculation functions, deriving the actual panel temperature from the delayed sensor readings
2Ease of manufacture
If the temperature sensor is disposed away from the liquid crystal display panel, then mounting is easier, but the temperature estimation accuracy decreases
Solution Approach 1:
The control unit stores past temperature data and performs preliminary calculations to estimate current panel temperature, compensating for the distance between sensor and panel before applying gray scale correction
Solution Approach 2:
The control unit continuously receives sensor output, calculates panel temperature using stored historical data, and applies corrections based on the calculated temperature, creating a feedback loop that maintains accuracy despite sensor distance
3Device complexity
If gray scale correction is applied using delayed temperature data, then the processing is simpler, but the display quality deteriorates
Solution Approach 1:
The control unit performs preliminary temperature calculations using stored past data before gray scale correction is applied, ensuring accurate temperature compensation without increasing processing complexity
Solution Approach 2:
The patent replaces direct physical temperature measurement with a calculation-based temperature estimation system that uses sensor data and historical information to derive accurate panel temperature
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 approach allows for accurate temperature estimation of the display panel even when the heat source's temperature changes, reducing errors caused by time lags and environmental influences.
Implementation Method 1
The control unit calculates the temperature of the display panel based on a current output value of the temperature sensor and an output value of the temperature sensor received prior to the receiving of the current output value
Data Source
AI summary
A display device includes a temperature sensor which is arranged in the inside of a housing, and a control unit which calculates a temperature of a display panel based on an output value of the temperature sensor. The control unit calculates the temperature of the display panel based on a current output value of the temperature sensor and an output value of the temperature sensor received prior to the receiving of the current output value. With such a display device, the temperature of the display panel can be calculated with high accuracy even when a temperature of a device which constitutes a heat source is changed.