The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2011
Filed:
Apr. 10, 2009
Da-rong Huang, Tainan County, TW;
Da-Rong Huang, Tainan County, TW;
Himax Technologies Limited, Tainan, TW;
Abstract
A power detecting device, a power supply device using the same, and a reference voltage generator are provided. The power detecting device adapted to detect a power voltage of a display device includes a bandgap voltage generating circuit, a voltage regulating circuit, and a power-on reset circuit. The bandgap voltage generating circuit provides a reference voltage via an output terminal thereof. The voltage regulating circuit and the power-on reset circuit are coupled to the output terminal of the bandgap voltage generating circuit. When the power voltage doesn't reach a threshold voltage, the voltage regulating circuit increases the reference voltage referred by the power-on reset circuit. When the power voltage reaches the reference voltage, the power-on reset circuit generates a reset signal to reset the display device. Therefore, when the power voltage doesn't reach a stable, the power-on reset circuit will not be incorrectly started by increasing the reference voltage.