72 results about "Body capacitance" patented technology

The invention discloses an in cell touch panel and a display device. A plurality of self-capacitance electrodes which are arranged in the same layer and insulated from one another are arranged in the touch panel according to the principle of the self-capacitance. A touch detection chip can judge the touch position by detecting the capacitance change of each self-capacitance electrode. Due to the fact that body capacitance acts on all self-capacitance, compared with the condition that the body capacitance only acts on projection capacitance in mutual capacitance, the touch variable quantity caused when the human body touches the panel can be large, and therefore the signal to noise ratio of touch can be effectively improved, and accuracy of touch induction can be improved. In addition, compared with the condition that two new film layers need to be added to an array substrate when the touch function is achieved according to the mutual capacitance principle, the touch function can be achieved only by adding one layer of self-capacitance electrodes according to the in cell touch panel touch screen and the display device, and therefore production cost is saved, and production efficiency is improved.

The invention discloses a touch screen panel, a touch display panel and a display device. An electromagnetic shielding layer is arranged above wires, and projections of the wires on a first substrate are at least partially positioned in the range of the electromagnetic shielding layer. Therefore, the embodiment of the invention has at least one of the advantages that the influence of body capacitance on the wires in the range where the electromagnetic shielding layer is located can be shielded by the electromagnetic shielding layer, so that noise produced by the wires in the range of the electromagnetic shielding layer is eliminated to reduce the influence of the noise on the wires on touch sensing signals on touch electrodes and further increase the touch signal-to-noise ratio of the touch screen panel.

In accordance with this invention the above and other problems are solved by a switching apparatus and method that uses a switching circuit having a pair of parallel solid-state diodes (e.g., PN or PIN diodes), one of which is connected to a transistor (e.g., power MOSFET or IGBT), to switch a capacitor (or reactance element) in or out of a variable capacitance element (or variable reactance element) of an impedance matching network. Charging a body capacitance of the transistor reverse biases one of the two diodes so as to isolate the transistor from the RF signal enabling a low-cost high capacitance transistor to be used. Multiple such switching circuits and capacitors (or reactance elements) are connected in parallel to provide variable impedance for the purpose of impedance matching.

The invention discloses an in cell touch panel and a display device. Multiple self-capacitance electrodes which are arranged on the same layer and are independent of one another are arranged in the touch panel according to the self-capacitance principle. A touch detecting chip can judge the touch position by detecting change of the capacitance value of each self-capacitance electrode. Due to the fact that body capacitance acts on all the self-capacitance, compared with the mode that body capacitance only acts on projection capacitance of mutual capacitance, the touch variation caused by touch on the panel by a human body is larger, and the signal to noise ratio of touch can be effectively increased; in this way, the accuracy of touch sensing is improved. In addition, compared with the prior art that two new film layers need to be additionally arranged when the touch function is achieved according to the mutual capacitance principle, the in cell touch panel has the advantages that since an ADS-type pattern of a public electrode layer is changed, the multiple self-capacitance electrodes which are independent of one another and wires enabling the self-capacitance electrodes to be connected with the touch detecting chip are formed, no extra film layer is needed, the production cost is reduced, and the production efficiency is improved.

According to an exemplary embodiment, a voltage controlled oscillator includes a PFET having a first gate terminal, a first source terminal, a first drain terminal, and a first body terminal, where the first source terminal is coupled to a bias voltage and the first body terminal is coupled to a first tuning voltage. The voltage controlled oscillator does not include a discrete varactor diode. The voltage controlled oscillator further includes an NFET having a second gate terminal, a second source terminal, a second drain terminal, and a second body terminal, where the second body terminal is coupled to a second tuning voltage. The first and second drain terminals drive an output of the voltage controlled oscillator, where a frequency of the output is responsive to a change in the first tuning voltage. The change in the first tuning voltage causes a change in source-to-body capacitance of the PFET.

The invention discloses an embedded type touch screen and a display device. According to the embedded type touch screen and the display device, multiple self-capacitance electrodes which are arranged on the same layer and insulated from one another are arranged in the touch screen by means of the self-capacitance principle, and a touch control detection chip can judge the touch position by detecting the capacitance variation of each self-capacitance electrode; due to the fact that body capacitance acts on all the self-capacitance, touch variation caused when the human body touches the screen is larger compared with the technical scheme that body capacitance only acts on projective capacitance in mutual capacitance, and therefore the signal to noise ratio of touch control can be effectively improved, so that the accuracy of touch induction is improved; furthermore, compared with the prior art that self-capacitance electrodes are arranged between an upper substrate and a flat layer, composition needs to be conducted on the flat layer to enable breakover connecting points arranged on the same layer with the self-capacitance electrodes to be exposed and the breakover connecting points are electrically connected with a connecting terminal of a touch control detection chip located on a lower substrate through border adhesives, the embedded type touch screen and the display device have the advantages that the self-capacitance electrodes are arranged between the flat layer of and a partition pad of the upper substrate, and therefore composition of the flat layer is omitted and manufacturing techniques are simplified.

The present invention is an inductance plethysmograph transducer particularly suited for use in respiratory monitoring. The transducer is in the form of a woven fabric providing a substantially flat extensible belt for encircling a portion of a patient for a wide range of patient sizes. The transducer is used for monitoring changes in cross-sectional area corresponding to changes in volume of an expandable organ such as the patient's chest or abdomen. At least one electrical conductor is woven directly into the fabric in a manner that improves the electrical performance of the transducer over the prior art in two ways. First, a high-density weave is used for the fabric that produces many more inductive turns of the embedded conductor(s), thereby increasing the overall inductance change, hence improving the signal to noise ratio, and increasing the expandability of the effective length of the transducer. Secondly, the conductor(s) are oriented within the weave perpendicular to the surface or the torso of a patient being monitored, thus reducing artifact due to body capacitance. In addition to improvements in the electrical performance, the manufacture of the inductance sensor is a single step process that can be carried out on existing looms, reducing the overall cost while improving the flexibility, durability, and ease of use. The present invention is also machine washable making reuse much less labor intensive and therefor much less expensive.

The invention features a conducting system which when attached to an object, the system converts the object into input device used to input functions on a touch screen device. The system features a material having an active capacitive layer with an antenna design which stores an electrical charge that is substantially similar to a human's body capacitance. Additional layers may be provided for attaching the material and protecting the material.

A semiconductor structure having a body capacitance plate, which is formed with a process that assures that the body capacitance plate is self-aligned to both the source line (SL) diffusion and the bitline diffusion is provided. Thus the amount of overlap between the SL and the bitline diffusions and the body capacitance plate is precisely controlled. More specifically, the present invention forms the structure of a 1T-capacitorless SOI body charge storage cell having sidewall capacitor plates using a process that assures that there is 1) minimal overlap between plate and source / drain diffusions, and 2) that the minimal overlap obtained in the present invention is precisely controlled and is not subject to alignment tolerances. The inventive cell results in larger signal margin, improved performance, smaller chip size, and reduced dynamic power dissipation relative to the prior art.

In accordance with this invention the above and other problems are solved by a switching apparatus and method that uses a switching circuit having a pair of parallel solid-state diodes (e.g., PN diodes), one of which is connected to a transistor (e.g., power MOSFET or IGBT), to switch a capacitor in or out of a variable capacitance element of an impedance matching network. Charging a body capacitance of the transistor reverse biases one of the two diodes so as to isolate the transistor from the RF signal enabling a low-cost high capacitance transistor to be used. Multiple such switching circuits and capacitors are connected in parallel to provide variable impedance for the purpose of impedance matching.

The invention provides an anti-fatigue cushion intelligent control unit. The intelligent control unit comprises a one-chip microcomputer control module, a temperature sensor module, a human body capacitance sensor module, an alarm module, a massage module, a timer module, a heating physiotherapy module and a refrigeration and heat radiation module, and the one-chip microcomputer control module is respectively connected with a power supply module, a pressure sensor module, the temperature sensor module, the human body capacitance sensor module, the alarm module, the timer module, the heating physiotherapy module, the refrigeration and heat radiation module and a manual setting module. A temperature sensor collects temperature data of surrounding environment and a cushion and human body contact surface, the heating physiotherapy module and the refrigeration and heat radiation module provide a most comfortable temperature for a user, the timer module records the sitting time of the user, the alarm module regularly prompts the user to depart from the cushion and properly take a rest, and the massage module can provide basic massage, so the anti-fatigue cushion intelligent control unit has the advantages of convenient and safe use, and alleviation of fatigue induced by long-time sitting.

A gun shaped game controller includes a gun shell, a calibration key, self-defined function keys, a two-axis gyroscope chip, a two-axis geomagnetic chip, a three-axis gravity acceleration chip, a human body capacitive touch chip, a battery compartment, a trigger, an arrow key, a cancel key, an infrared sensor, an angle adjustment knob and a main control circuit board. The two-axis gyroscope chip, the two-axis geomagnetic chip and the three-axis gravity acceleration chip achieve 3D spatial positioning of a “virtual potentiometer” via spatial geometrical mathematical modeling algorithm to meet predetermined objectives.

A voltage controlled oscillator (VCO), IC and CMOS IC including the VCO. The VCO includes an LC tank circuit, a pair of cross-coupled devices connected to the tank circuit and driving a pair of buffers. Each of the pair of cross-coupled devices includes a field effect transistor (FET) with an independently controllable body, e.g., the surface layer of a Silicon on Insulator (SOI) chip or the surface well of a multi-well chip. Diodes in the multi-well structure are biased off in each device. The tank circuit is coupled to the buffers solely through the FET drain to body capacitance.

The invention discloses an in cell touch panel and a display device. The in cell touch panel comprises a lower substrate, an upper substrate, a self-capacitance electrode, a ground electrode and a driving circuit, wherein the lower substrate and the upper substrate are arranged in a face-to-face mode, the self-capacitance electrode is arranged between the upper substrate and the lower substrate, the ground electrode corresponds to the self-capacitance electrode, and the driving circuit is used for applying signals to the self-capacitance electrode and the ground electrode. The driving circuit is used for applying the same touch control scanning signals to the self-capacitance electrode and the ground electrode at the same time in the touch control stage. In this way, when the signals on the to the self-capacitance electrode and the signals on the ground electrode are the same in the touch control stage, the voltage of the self-capacitance electrode and the voltage of the ground electrode are equal all the time theoretically, namely, the difference between the voltage of the self-capacitance electrode and the voltage of the ground electrode is equal to zero, and therefore the capacitance of the self-capacitance electrode relative to the ground electrode is equal to zero. Due to the fact that the Base capacitance of the self-capacitance electrode is relatively smaller, the body capacitance can be larger than the Base capacitance when a human body conducts touch control, the relative change quantity of the capacitance can be large, and the purposes of increasing the touch control signal-to-noise ratio and improving the touch control sensitivity of the touch panel are achieved.

The invention relates to a garbage can remotely controlled by a smart phone. The garbage can is characterized in that the structure of the garbage can comprises a pedestal, a barrel body, a barrel shell, a barrel cover, universal wheels, inductors, charging interfaces, a switch button, a signal receiver and an Android phone, wherein the pedestal and the barrel shell are of quadrilateral cubes, the barrel body is arranged on pedestal, the barrel shell and the barrel cover are integrally connected, the inductors, a controller and a charging type battery are arranged in the pedestal, the charging interfaces are formed in the outer edge of the pedestal, the switch button is arranged on the outer edge of the pedestal, the signal receiver is mounted above the edge of the barrel shell, and the universal wheels are arranged on the bottom of the pedestal; and the inductors comprise a field effect human body inductor, a body capacity inductor, a pyroelectricity human body infrared inductor, a microwave Doppler human body inductor, an infrared reflection human body inductor and a contact sensor. The intelligent garbage can is very practical for people having difficulty in moving, disables, elders and the like.

According to an exemplary embodiment, a voltage controlled oscillator includes a PFET having a first gate terminal, a first source terminal, a first drain terminal, and a first body terminal, where the first source terminal is coupled to a bias voltage and the first body terminal is coupled to a first tuning voltage. The voltage controlled oscillator does not include a discrete varactor diode. The voltage controlled oscillator further includes an NFET having a second gate terminal, a second source terminal, a second drain terminal, and a second body terminal, where the second body terminal is coupled to a second tuning voltage. The first and second drain terminals drive an output of the voltage controlled oscillator, where a frequency of the output is responsive to a change in the first tuning voltage. The change in the first tuning voltage causes a change in source-to-body capacitance of the PFET.

A floating body dynamic random access memory (DRAM) structure has a shallow source (first source portion) and a deep source (second source portion), of which the deep source is thicker. A portion of the floating body extends beneath the shallow source to provide extra capacitance. Optionally, the portion of the floating body beneath the shallow source may be more heavily doped than the depletion zone of the body to further enhance the capacitance. Also, by forming a raised portion of the source without raising the drain, the same implantation energy may be used to dope the raised source and the regular drain. The resulting floating body DRAM structure has an enhanced source to floating body capacitance and stores more charges. Operating margins for write and sense operations are increased and the performance and stability of the floating body DRAM are enhanced.

Devices that couple to high voltage transmission lines obtain power themselves using the body capacitance of an element of the devices. The devices generate a comparatively lower voltage from the current flowing between the high voltage line and the element of the device that generates the body capacitance. The devices can be used to operate sensors that monitor the transmission lines or parameters of the power distribution system, such as current, line temperature, vibration, and the like. The devices can also be used as indicators, such as aircraft warning lights, information signs, etc. In addition, the devices can operate as RF transmission / reception or repeater devices, radar devices, mesh networking nodes, video / audio surveillance, sound emitting devices for scaring animals, drones that traverse the power line, etc. Because the devices operate in response to line voltage rather than current, the devices are reliable even in low current conditions.

A structure and method for reducing second-order harmonic distortion in FET devices used in applications that are sensitive to such distortion, such as switching RF signals. The asymmetry of the drain-to-body capacitance Cdb and source-to-body capacitance Csb of a FET device are equalized by adding offsetting capacitance or a compensating voltage source.

The invention discloses a touch ceiling lamp. The touch ceiling lamp comprises a light shielding cover, a light reflection bowl, an induction electrode, an induction capacitive sensor and a light source, wherein the light shielding cover is of a platy structure, the light reflection bowl and the light shielding cover are connected in a matched mode, the induction electrode is arranged on the inner surface of the light shielding cover or the inner surface of the light reflection bowl, the induction capacitive sensor is arranged on the inner surface of the light reflection bowl and connected with the induction electrode, and the light source is arranged on the inner surface of the light reflection bowl. The induction electrode is arranged on the inner surface of the light shielding cover or the inner surface of the light reflection bowl in the ceiling lamp. When a hand gently touches any position of the light shielding cover, the hand and the induction electrode serve as two electrodes of a capacitor, the human body capacitance value is collected through the induction capacitive sensor, a light source switch of the automobile ceiling lamp is controlled, the control over the touch mode of the automobile ceiling lamp is achieved, use is convenient, easy and rapid, the influences caused by the mechanical movement damage to the service life of keys of the automobile ceiling lamp when a traditional mechanical switch is used are avoided, and the service life of the keys of the automobile ceiling lamp and the service life of the automobile ceiling lamp are prolonged.

The invention discloses an intelligentized body capacitance multi-point touch induction antitheft device which is composed of a master controller and a plurality of capacitance touch inductors. A single-chip microcomputer chip and a detection control circuit are arranged in the master controller, capacitive body induction chips with an automatic correction function are adopted in the touch inductors, the capacitive body induction chips are small in appearance and can be mounted at any position of the back face of nonmetal matter in a motor vehicle cab according to the type of a motor vehicle and the operation habits of a vehicle owner, and the elusive performance is strong. An oiling diagram of the motor vehicle can be disconnected in the antitheft state, a driver needs to carry out unlocking through the touch inductors, the touch inductors can be selected to be mounted, the unlocking mode of the combined touch and sequential touch of a single point and multiple points is formed, multiple unlocking combinations exist, and passwords are hard to crack. The device is suitable for fuel oil motor vehicles such as small vehicles and motorcycles, and has the advantages that the antitheft performance is high, and the unlocking operation is convenient, simple and intelligent. The invention further discloses an antitheft method.

The invention discloses a conveying pipeline human body detection device based on capacitance detection, and particularly relates to the technical field of conveying pipeline human body detection. Theconveying pipeline human body detection device based on the capacitance detection comprises an insulating tube and a metal shielding cover, wherein a detection electrode is arranged in the insulatingtube; a detection circuit is arranged in the metal shielding cover, and the detection electrode is connected with the detection circuit through a connecting cable; the detection circuit comprises a signal conversion circuit, a decision judgment circuit, an I / O digital output and 485 communication circuit which are sequentially connected; in the working process of the detection device, the detection electrode converts a human body capacitance signal into a current signal, the current signal is amplified, arranged and converted into a voltage signal by a signal conversion circuit, and the voltage is output to a decision judgment circuit after being judged by the decision judgment circuit; and the decision judgment circuit processes the output of the judgment circuit to obtain the result ofpresence or absence of personnel, and the I / O digital output and 485 communication circuit outputs the judgment result.

The invention discloses a method for detecting comprehensive skin data. The method is that an oscillating circuit is used for acquiring data; a single-chip microcomputer is used for recording and calculating data and receiving the data through a mobile terminal; the capacitance value and the resistance value of human body capacitance and human body resistance are calculated by the frequency formula of F=1.44 / ((R1+2R2)*C1) based on the tested moisture data and then converted into water percent and oil percent; then the human body water data and the human body oil data can be obtained according to the set sheet; then the comprehensive skin indicators can be evaluated according to the set range, and the indicators can be used as the reference for skin care or treatment. The method is small in power consumption, fast, and stable and accurate in detection data.

A structure and method for reducing second-order harmonic distortion in FET devices used in applications that are sensitive to such distortion, such as switching RF signals. The asymmetry of the drain-to-body capacitance Cdb and source-to-body capacitance Csb of a FET device are equalized by adding offsetting capacitance or a compensating voltage source.

The invention discloses a capacitive MEMS sensor detection circuit. The circuit is used to detect the displacement change of a pole plate of a MEMS. The capacitive MEMS sensor detection circuit mainly comprises a high-frequency oscillation circuit generating sine waves, two C-1 / V detection circuits, a differential amplification circuit, a phase shift network, a multiplication circuit, a low-pass filter circuit, and an amplification output circuit. The high-frequency oscillation circuit generates three in-phase sine waves, two of which are supplied to the two C-1 / V detection circuits to detect C-1 change caused by the displacement of the pole plate of the MEMS. The differential amplification circuit is used to eliminate the influence of body capacitance and improve the precision of detection. The phase shift network is used to compensate phase shift through the C-1 / V circuits and ensure that the signals input to the multiplication circuit are of the same phase. The low-pass filter circuit filters high harmonics of signals output by a multiplier and extracts the signals reflecting the displacement change of the pole plate of the MEMS so as to complete detection of the displacement change of the pole plate of the MEMS.

The invention discloses a non-contact high-sensitivity alarm based on human body capacitance induction, a design and a use method. Firstly, a formula between the sensitivity of a parallel plate capacitor and pole plate spacing is derived, and then the sensitivity of a variable pole spacing capacitor is obtained. An LC parallel circuit is constructed, the two ends of a capacitor of the circuit areconnected in parallel and a metal pole plate is led out, when the distance between a person and the metal pole plate changes, the value of the capacitance further changes, and the capacitance value ofthe capacitor is further determined by measuring the frequency of LC parallel resonance. Single linear interpolation is adopted to fit the linear relationship between induction capacitance and induction distance. When a human body is close to or far away from the metal pole plate, the capacitance value changes, so that the circuit resonance frequency changes, and thus an alarm is triggered. The non-contact high-sensitivity alarm adopts the LC parallel circuit resonance to measure resonance frequency and has the characteristics of high anti-interference capability, good environmental adaptability and the like, and the non-contact high-sensitivity alarm can be produced on a large scale and has great market potential.

The present invention provides an infrared touch screen touched by human capacitance, a transparent conductive coating is covered on the protecting glass plate of the touch screen, and the circuit system of the touch screen includes a set human parasitic capacitance signal detection treatment system, the output end of the system is connected with the I / O end of the microcontroller in the touch screen. The parasitic capacitance signal detection treatment system triggers screen to check touching operation after checking the capacitance between fingers and conductive coating. The invention utilizes the inductive stray electromagnetic signal, the attenuation of parasitic capacitance to the vibrator, the dromotropic action of AC signal between two finger shaped cross semimembranes of the parasitic capacitance to achieve the detection of the parasitic capacitance. The invention has mature technology, lower cost, effectively filters the false triggering interference caused by bug and flotage etc, at the same time can greatly prolong the worlding life of the touching screen.