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:
Apr. 27, 2010
Filed:
Jun. 07, 2007
Nan-jiun Yin, Miao-Li, TW;
Yen-hsien Su, Miao-Li, TW;
Nan-Jiun Yin, Miao-Li, TW;
Yen-Hsien Su, Miao-Li, TW;
Coretronic Corporation, Hsinchu, TW;
Abstract
A projection apparatus comprises a projection control unit, power supply device and fan. The projection control unit generates an image beam. The power supply device comprises a filter and voltage driving unit. The voltage driving unit is coupled to the filter and comprises a voltage-regulation feedback unit and current amplification component. The filter receives a PWM signal and accordingly outputting a first DC voltage. The voltage-regulation feedback unit receives the first DC voltage and outputs a second DC voltage. The current amplification component is coupled to the voltage-regulation feedback unit for receiving an operational voltage and the second DC voltage, current-amplifying the second DC voltage, and accordingly outputting a driving voltage, which is fed back to the voltage-regulation feedback unit. The voltage-regulation feedback unit regulates the driving voltage according to the first DC voltage. The fan receives the driving voltage for releasing heat of the projection control unit.