Abstract:
An electronic device including a control module and a filter. The electronic device generates a pernicious substance when the electronic device is operated. The control module controls the electronic device. The filter filters the pernicious substance.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to an electronic device, and more particularly to an electronic device for eliminating a pernicious substance generated by the electronic device. 
         [0003]    2. Description of the Related Art 
         [0004]    With technology development, more electronic products are invented. The electronic products comprise electronic devices, electric machinery devices and photoelectric devices. When one electronic product is operated, various pernicious substances, such as toxic substances, foul gas, or positive ion, are generated due to temperature or high voltage. If the pernicious substances are inhaled by a person, the person feels uncomfortable. Taking a computer as an example, when the computer is operated, positive ions are continuously generated by a monitor. Since the monitor is normally close to the user, positive ions are inhaled by the user. 
         [0005]    Additionally, when a vehicle is operated, pernicious substances are generated by an engine of the vehicle. A chemical reaction is caused when the pernicious substances touch water. Thus, the driver may feel eye or lung discomfort, due to a nitrous acid generated by the chemical reaction. 
       BRIEF SUMMARY OF THE INVENTION 
       [0006]    Electronic devices are provided. An exemplary embodiment of an electronic device comprises a control module and a filter. The electronic device generates a pernicious substance when the electronic device is operated. The control module controls the electronic device. The filter filters the pernicious substance. 
         [0007]    A detailed description is given in the following embodiments with reference to the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    The invention can be more fully understood by referring to the following detailed description and examples with references made to the accompanying drawings, wherein: 
           [0009]      FIG. 1  is a schematic diagram of an exemplary embodiment of an electronic device; 
           [0010]      FIG. 2  is a schematic diagram of an exemplary embodiment of a filter; 
           [0011]      FIG. 3  is a schematic diagram of another exemplary embodiment of the filter; and 
           [0012]      FIG. 4  is a schematic diagram of another exemplary embodiment of the electronic device. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0013]    The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims. 
         [0014]      FIG. 1  is a schematic diagram of an exemplary embodiment of an electronic device. The electronic device  100  comprises a control module  110  and a filter  120 . When the electronic device  100  is operated, a pernicious substance is generated. The pernicious substance is eliminated by the filter  120 . 
         [0015]    In one embodiment, the electronic device  100  further comprises a display panel  130 , a fan  140 , and a detector  150 . In another embodiment, the electronic device  100  comprises one of the display panel  130 , the fan  140 , and the detector  150  or comprises two of the display panel  130 , the fan  140 , and the detector  150 . 
         [0016]    The display panel  130  is controlled by the control module  110 . In this embodiment, the control module  110  is a micro-controller. The display panel  130  is capable of displaying dynamic images. For example, the display panel  130  is a panel of a television, a monitor, or a portable product, wherein the portable product can be a 3G cell phone or a PDA. When the electronic device  100  is operated, the display panel  130  generates a large amount of positive ions. The positive ions can be eliminated by the filter  120 . 
         [0017]    The rotational speed of the fan  140  is controlled by the control module  110 . In one embodiment, the fan  140  and the control module  110  are simultaneously turned on. The control module  110  dynamically adjusts the rotational speed of the fan  140  according to the concentration of the pernicious substance. When the fan  140  is operated, the pernicious substance is blown away or the filtering range of the filter  120  is increased. When the concentration of the pernicious substance is less than a preset value, the control module  110  stops activating the fan  140  to avoid excess power consumption. In other embodiments, the fan  140  is replaced by other wind loops. 
         [0018]    The detector  150  detects the concentration of the pernicious substance and provides the detection result to the control module  110 . The control module  110  resiliently adjusts the filtering strength of the filter  120  according to the concentration of the pernicious substance. Thus, the pernicious substance is effectively eliminated. In some embodiments, the detector  150  directly provides the detection result to the filter  120 . 
         [0019]      FIG. 2  is a schematic diagram of an exemplary embodiment of a filter. The filter  120  comprises a high voltage generator  210  and a filtering substance generator  220 . The high voltage generator  210  transforms an input voltage S P  into a high voltage signal S HP  according to a control signal S C  generated by the control module  110 . 
         [0020]    In this embodiment, filtering substance generator  220  is an ozone generator. The ozone generator generates ozone according to the high voltage signal S HP . When the concentration of the ozone is higher, the ozone can sterilize the air. When the concentration of the ozone is lower, the ozone freshen the air. The control signal S C  is generated by the control module  110  for activating or de-activating the filter  120  every a constant time. 
         [0021]    Additionally, the control module  110  determines the concentration of the ozone according to the concentration of the pernicious substance. When the concentration of the pernicious substance is less than a preset value, the filter  120  is de-activated to save power. In some embodiments, the filtering substance generator  220  is a negative ion generator for generating negative ions. The negative ion generator is capable of counteracting the pernicious substance, such as positive ions. When the negative ion generator receives the high voltage signal S HP , negative ions are generated for eliminating foul gas and the pernicious substance. 
         [0022]      FIG. 3  is a schematic diagram of another exemplary embodiment of the filter. The filter  120  comprises a driving circuit  310  and a photocatalyst  320 . The driving circuit  310  drives the photocatalyst  320  for eliminating the pernicious substance generated by the electronic device  110 . In this embodiment, the driving circuit  310  comprises a light emitting diode (LED)  311  for emitting ultraviolet rays. When the ultraviolet rays irradiate the photocatalyst  320 , the photocatalyst  320  is activated for eliminating the pernicious substance. 
         [0023]      FIG. 4  is a schematic diagram of another exemplary embodiment of the electronic device.  FIG. 4  is similar to  FIG. 1  with the exception that a power supply module  410  is added. The power supply module  410  provides power, such as the input voltage S P , to the control module  110  and the filter  120 . Since the control module  110  and the filter  120  utilize the same power supply module, the cost of elements is reduced and usable space is increased. 
         [0024]    While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.