Yantai Yatai Photoelectricity Equipment Co., Ltd.



The present invention relates generally to electronic

by:Yatai     2020-04-24
Electronic digital thermometers which have heretofore been proposed included a probe element connected by a cable to a separate display chassis, Such devices have been cumbersome to use in practice and have had other disadvantages due to theirprovision for digital readout on only a single temperature scale. Further, it has been difficult to determine in such devices when a particular temperature reading could be considered stabilized. A series of three indicator lamps are provided on the rear of the probe for respectively indicating whether the temperature reading is increasing, decreasing or has stabilized. A differentiator is fed by the amplifier to form an output voltageindicative of the rate of change of the temperature reading. This output voltage feeds a comparator means having three outputs for respectively driving the lamps. The outputs are respectively energized if the output voltage is greater than apredetermined positive constant, less than the negative of the constant, and between the constant and its negative. The circuit means includes an amplifier fed by the transducer which has selectable gain and bias parameters controlled by a switch mounted at the rear of the probe. The switch selects gain and bias parameters for enabling the display to read ineither degrees Fahrenheit or degrees Centigrade. Briefly, the aforementioned and other objects of the present invention are satisfied by providing an electronic digital thermometer self-contained in an elongated probe carrying a temperature transducer at its front end and an electronic digitaldisplay at its rear end. Circuit means housed within the prove converts the analog output signal from the transducer to a digital signal for driving the display. Moreover, generally, the power source of a thermometer is installed in the thermometer. It is difficult to take out. The power lose from the backlight plate will cause a great power reduction in the power source and thus the panel of the display unit will become dim. Furthermore the lifetime of the thermometer will short. The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. To achieve above objects, the present invention provides a display assembly of a digital thermometer which comprises: a heat sensor, a display unit, a backlight plate, and a processor; wherein the heat sensor measures temperature; after measurement of temperature, if it is detected that the temperature is decreased, the processor will actuate the backlight plate for illuminating the display unit. The display unit displays measured temperature values after measurement of temperature. The display unit is actuated with the backlight plate for displaying the measuring data. A buzzer is installed in the thermometer, after measurement of temperature, the buzzer will emit sound. The processor can de-actuate automatically. The thermometer has an adjustment unit.
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