Invention Grant
US09326349B2 LED, testing method and article 有权
LED,测试方法和文章

  • Patent Title: LED, testing method and article
  • Patent Title (中): LED,测试方法和文章
  • Application No.: US14626029
    Application Date: 2015-02-19
  • Publication No.: US09326349B2
    Publication Date: 2016-04-26
  • Inventor: Jörg Niggemeyer
  • Applicant: Nucon GbR
  • Applicant Address: DE Buchholz
  • Assignee: Nucon GbR
  • Current Assignee: Nucon GbR
  • Current Assignee Address: DE Buchholz
  • Agency: Seed IP Law Group PLLC
  • Priority: DE202014001507U 20140221; DE102014019434 20141222
  • Main IPC: H05B33/08
  • IPC: H05B33/08 H05B37/00
LED, testing method and article
Abstract:
A Light Emitting Diode (LED) driving circuit includes a reference-voltage terminal, an input terminal to receive a pulse-width modulated (PWM) power signal, and a PWM output terminal. An LED is coupled across the PWM output terminal and the reference-voltage terminal. A measurement capacitor circuit and a voltage-divider network are coupled in parallel with the LED. During an interruption of the PWM power signal, a sense node of the voltage-divider provides a voltage indicative of a temperature of the LED prior to the interruption. The voltage indicative of the temperature is used to control driving of the LED.
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