PROBLEM TO BE SOLVED: To keep battery power consumed by LEDs low in an ear thermometer loaded with the LEDs displaying the condition of a battery and the operating condition of the instrument.SOLUTION: In the ear thermometer 1, a thermometer body 5 has a first LED 1 to display the voltage condition of the battery BATT and a second LED 2 to inform the user of a temperature measuring condition, and performs control to make the first LED continue to be on and to turn off the second LED when the voltage of the battery falls short of a first low-voltage reference, and to turn off the first LED when the voltage of the battery falls short of the second low-voltage reference lower than the first low-voltage reference, and to make the first LED flicker and makes the second LED continue to be on when the voltage of the battery is a value between the first low-voltage reference and a normal-voltage reference higher than that, and to turn off both first LED and second LED when the voltage of the battery is equal to or higher than the normal-voltage reference.COPYRIGHT: (C)2010,JPO&INPIT【課題】バッテリ状態や装置の動作状態を表示するLEDを搭載しながらも、LEDによるバッテリ消費電力を低く抑える。【解決手段】耳式体温測定装置1において、測定装置本体5はバッテリBATTの電圧状態を表示するための第1LED1と、温度測定状態を告知するための第2LED2とを備え、バッテリの電圧が第1の低電圧基準を下回った時に第1LEDを連続点灯させ、第2LEDを消灯させ、バッテリの電圧が第1の低電圧基準よりも低い第2の低電圧基準を下回った時に第1LEDを消灯させ、バッテリの電圧が第1の低電圧基準とそれよりも高い正常電圧基準との間の値である時に第1LEDを点滅させ、第2LEDを連続点灯させ、バッテリの電圧が正常電圧基準以上である時には第1、第2LEDを共に消灯させる制御をする。【選択図】 図11
