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公开(公告)号:KR1020010039279A
公开(公告)日:2001-05-15
申请号:KR1019990047591
申请日:1999-10-29
Applicant: 한국과학기술연구원
IPC: G01P1/00
Abstract: PURPOSE: A vehicle speed displaying apparatus is provided to be capable of suppressing overspeed by displaying a running speed of a vehicle so as to be exposed at the exterior. CONSTITUTION: A vehicle speed displaying apparatus comprises an analog-to-digital converter(310), a light emitting diode(LED) driving part(320), an LED(330), and a constant voltage generating part(340). The analog-to-digital converter(310) converts an analog speed value from a speed sensor into a digital value, and the LED driving part(320) decodes the digital value from the analog-to-digital converter(310) to output an LED drive signal. The LED(330) displays a vehicle speed in response to an output of the LED driving part(320). The constant voltage generating part(340) generates a constant voltage(5V) when a start key(350) becomes on and drops the constant voltage through a zener diode(ZD1). The dropped voltage(3V) applied to the LED driving part(320) and the LED(330).
Abstract translation: 目的:提供一种车速显示装置,能够通过显示车辆的行驶速度来抑制超速从而暴露在外部。 构成:车速显示装置包括模拟数字转换器(310),发光二极管(LED)驱动部分(320),LED(330)和恒定电压产生部分(340)。 模拟数字转换器(310)将来自速度传感器的模拟速度值转换为数字值,并且LED驱动部分(320)解码来自模数转换器(310)的数字值,以输出 LED驱动信号。 LED(330)响应于LED驱动部(320)的输出而显示车速。 当起动键(350)接通并且通过齐纳二极管(ZD1)降低恒定电压时,恒压产生部分(340)产生恒定电压(5V)。 施加到LED驱动部分(320)和LED(330)的下降电压(3V)。