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:
Jul. 21, 2009
Filed:
May. 19, 2006
Yun LI, Taipei, TW;
Guoqiang Tang, Taipei, TW;
David Ho, Taipei, TW;
Inventec Appliances Corp., Taipei, TW;
Abstract
A mobile communication device is provided. The mobile communication device includes a processing unit, a battery unit, a solar cell unit, an electronic switch circuit and an analog to digital converter (ADC). In the mobile communication device, the solar cell unit receives a light and thus a luminance and transforms the luminance into an analog voltage. The ADC is configured to convert the analog voltage into a digital voltage. The processing unit is used to transmit a control voltage according to the digital voltage. In response to the control signal, the electronic switch circuit is controlled to turn the solar cell unit on or off and the solar cell unit provides all, a portion or none of a working current required for the processing unit according to the action of the electronic switch circuit. In addition, a luminance value may be generated according to the light received by the solar cell unit so that a user may be aware of the light quality of the ambient environment, thereby preventing himself/herself from reading under a poor light source environment thus protecting his/her eyesight from being damaged.