The Patents of Boban Stojanovic

(WO/2009/102228) PLANAR CAPACITIVE PROXIMITY SENSOR

(WO/2009/110814) STANDUP SENZOR

The blog is designed for the purpose of publication of my patents and applications. 1989. I entered electrical engineering faculty in Belgrade .1991. I left for Germany because of the war in former Yugoslavia. 1992. I came back from Germany and suffered from depression .Due to illness, I failed to graduate from university although I had been an excellent student. 2004., after one week of work, I submitted a patent application for automatic toilet. The automatic toilet worked on the principle of filtration of sound and it automatically flushed after usage. After some time I gave up the idea of the patent, because the solutions with IC reflecting sensors appeared to be more practical.Afterwards, I patented semi conductive arrestor. The patent was designed for automatic arrestors as an additional element, which would give 5V to the plug box or the light bulb switch if no consumer around. In case of the consumer, that says if the capacity is more than 1mA, two thyrstors make a short circuit and give 220V to the plug box. If the electric current is more than 3A, an additional relay bridge the trhystors so there is no drop voltage of 0,7V in them. The appliance would cost about 2 dollars and it would eliminate parasite capacities of the home installation. The essence of the appliance is in its safety. I received a gold medal for this patent at the Tesla Fest in Novi Sad. After a few months and many contacts, I found out about similar patent in Germany. Although the function difference was obvious there also existed some kind of a legal chance to cover the part of the market, which had not been covered by the Germans, but I gave up the idea.

Early in 2005, due to the lack of ideas and with a need to create, I started work on children’s contact free musical potties. Forasmuch as the idea was soon practically realized, the device needed some improvement. The device used about 15 micro A with a supply of 3V. Besides, it was necessary that the device in discreet technique would cost about 0, 3-0, 7 dollars. The device was thought to be a self-adhesive box. It was clear that with the small price of the device he could displace the old technology of manufacturing of musical potties because the costs of the montage which depended on manpower in Western Europe cost about 0,3 -0,7 dollars.The appliance of the sensor in children’s toys and dolls was more than obvious intention of some manufacturers to exploit the patent by the legal maneuvers without any kind of redress.Early in 2008 I submit a number of patent applications for capacitive sensor .The device detected capacitance cities lower than 0, 1 pF. That means it could detect a conductor, electrolyte, or hand at 1-2 cm distance. The device is relatively simply constructed and it would find its appliance in self-disconnecting flat iron, wireless computer mouse and many other devices. There are seven patent applications for this device . The device uses about 3 micro A. In wireless computer mouse, the device would decrease battery consumption in standby regime and would extend duration of batteries at least for 50 %. The use of the device in mobile phones is more than obvious. The device is also possible to realize as a sensor matrix, therefore the detection of the finger would be possible, and as a quite practical usage, it could appear in remote controls and keyboards in which case there will not be need for contact or a chance for the devices to break. For patents Stand up sensor I received the second gold medal in 2008 in Novi Sad. For standard CMOS circuits and integrated circuit, CMOS 4069 here are some characteristics: Operating voltage: from 2,3V to 3,1V. Electric current consumption: from 3 to 5 micro A.Detection area: from 0.3-2 cm depending on circuit perimeters .The sensitivity is easy to adjust even in arrange of 2 cm. When an electrolyte or hand is detected the device is noise resistant. Even near the mobile phones, obstructions or errors are not induced. . For some device which need 1,5V batteries it would be used 74HC04. If instead of a hand contact by pushing the button, we replace the construction and install the capacitive sensor, we would get the pushbutton that could not break down. For capacitive sensor, there is no need of any kind of contact. Electrodes of push buttons are insulated. When a finger pushes a button a rubber part of the button with electrodes makes some condenser which activates sensor. Suchlike construction of the buttons on a keyboard gives almost infinite lifetime of the keyboard. Beside the a-stabile multi-vibrator , it is necessary to add an analogue mixer and de-mixer. The price of theses keyboards would be similar and even if the additional electronics were made separately, it would be more economical for PCB keyboards since there is no need for a graphite therefore the construction of passive part of the keyboard is much simpler.