| 摘要 |
An LCD(Liquid Crystal Display) is provided to obtain a temperature-dependent voltage with no noise and improved sensitivity, which indicates a temperature of an LCD panel, thereby accurately checking the temperature of the LCD panel. An LCD comprises an LCD panel and a temperature measurement unit(400). The temperature measurement unit includes a temperature sensor(330), a voltage divider(320), and a differential amplifier(350). The temperature measurement unit measures the temperature of the LCD panel. The temperature sensor outputs a first temperature-dependent voltage(Vtemp1), which varies as the temperature of the LCD panel. The temperature sensor includes a resistance-variable element(Rs), of which a resistance is varied as the temperature of the LCD panel, and a first resistance-fixed element(Rc1) in series connected to the resistance-variable element. The temperature sensor divides a first input voltage(Vin1) to output the first temperature-dependent voltage. The voltage divider divides a second input voltage(Vin2) to generate a reference voltage(Vref). The differential amplifier amplifies a difference between the first temperature-dependent voltage and the reference voltage to output a second temperature-dependent voltage(Vtemp2).
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