Patent number 8542277 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates to an electronic system, and more particularly, to a signal outputting circuit of the electronic system.
"The electro-static discharge (ESD) refers to the charge transfer phenomenon caused by objects with different electro-static potentials approaching each other or contacting each other directly. In recent years, with the rapid development of the technology, the microelectronic technique has been extensively applied and the electromagnetic environment has become more and more complex. As a result, the problems caused by the ESD in electronic products have attracted more and more attentions.
"The interferences of the ESD on circuits are divided into two situations. In one situation, the ESD current passes the circuits directly to cause damages. In the other situation, the electromagnetic field induced by the ESD current disturbs the circuits by ways of a capacitance coupling, an inductance coupling, and a space radiation coupling, etc.
"Generally, static electricity with different levels exists in humans and environments. When the accumulated static electricity reaches to a certain amount and then is contact with electronic devices, a discharge phenomenon will happen instantaneously. This natural discharge phenomenon will cause electronic devices, such as computers, mobile phones, PDAs or liquid crystal screens, etc, damaged seriously or work improperly.
"For example, if the liquid crystal display system is interfered by the ESD, then the interference may further affect the chip circuit in the video system, and the signals, transmitted from the image processing circuit to the liquid crystal screen, are disturbed to generate errors. The abnormal signals may cause twinkling or unstable display, and may further affect the displaying property of the screen."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "In order to solve the above-mentioned problem, the present invention is to provide a controlling apparatus, and the controlling apparatus of the invention can be adapted to a signal outputting circuit in the video system. The controlling apparatus is for selectively controlling the switch connected to the signal outputting circuit according to whether an electronic system has an abnormal condition.
"According to an embodiment of the invention, it is related to a controlling apparatus for a signal outputting circuit. The signal outputting circuit is located in an electronic system. The controlling apparatus comprises a detecting circuit, a switch and a controlling circuit. The detecting circuit is used for detecting that whether the electronic system has an abnormal condition. The switch is electrically connected between a signal receiving terminal and the signal outputting circuit. The controlling circuit is electrically connected between the detecting circuit and the switch. Once the detecting circuit detects that the electronic system has the abnormal condition, the controlling circuit sets the switch into a high-impedance state.
"According to another embodiment of the invention, it is related to a video system. The video system comprises an image outputting circuit, a detecting circuit, a switch and a controlling circuit. The detecting circuit is used for detecting that whether the video system has an abnormal condition. The switch is electrically connected between a signal receiving terminal and the image outputting circuit. The controlling circuit is electrically connected between the detecting circuit and the switch, and once the detecting circuit detects that the video system has the abnormal condition, the controlling circuit sets the switch into a high-impedance state.
"According to the invention, when the electronic system has the abnormal condition, the signal transmission to the signal outputting circuit or the signal transmission from the signal outputting circuit will be provisionally ceased until the abnormal condition is eliminated. By this action, erroneous output signals can be avoided to output to the video system to cause twinkling or unstable display.
"The advantage and spirit of the invention may be understood by the following recitations together with the appended drawings."
URL and more information on this patent, see: Huang, Chih-Chuan; Miao, Hui-Wen; Tso, Ko-Yang. Controlling Apparatus and Controlling Method for Signal Outputing Circuit and Video System. U.S. Patent Number 8542277, filed
Keywords for this news article include: Electronics,
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