| 摘要 |
The temperature of a LCD (43), for example provided in a mobile telephone (41), is measured by covering the LCD (43) with a conductive touch screen bottom sheet (42) having known resistance-temperature relationship. A temperature stable resistor (44) is connected to the touch screen bottom sheet (42), and a voltage is applied over the resistor and the sheet. The voltage signal between the resistor (44) and the touch screen bottom sheet (42) is measured and converted into digital representation by an A/D-converter (45). The measured voltage signal is used to calculate the temperature of the touch screen bottom sheet which is substantially equal to the temperature of the LCD (43).
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