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Boiko
Alexander Boiko, Calgary CA
| Patent application number | Description | Published |
|---|---|---|
| 20100292813 | Method and Apparatus for Tuning a PID Controller - In tuning a PID controller for a process in a feedback control system, a method is provided for bringing the system into symmetric self-excited oscillations for measuring the frequency and the amplitude of the oscillations, and tuning the controller in dependence on the measurements obtained. A control algorithm (modified relay feedback test) is introduced into the system in series with the process to excite self-excited oscillations in the system. Data and formulas are given for the computation of the specific parameter of the modified relay feedback test and for tuning the parameters of the PID controller. An apparatus for performing the method is disclosed. | 11-18-2010 |
Evgueni Boiko, Horley GB
| Patent application number | Description | Published |
|---|---|---|
| 20090046104 | DISPLAY DEVICE AND DRIVING METHOD THEREFOR - An active matrix display device comprises a plurality of pixels, and driving circuitry arranged to drive each pixel with a pre-determined drive voltage level during a first phase ( | 02-19-2009 |
| 20100188385 | SHIFT REGISTER CIRCUIT HAVING THRESHOLD VOLTAGE COMPENSATION - A shift register circuit comprises a plurality of stages, each stage being for providing an output signal to an output load and comprising a pull up transistor for pulling the output signal up to a high voltage rail and a pull down transistor for pulling the output signal down to a low voltage rail. Each stage comprises a circuit for sampling the threshold voltage of at least one of the pull up and pull down transistors and for adding the sampled threshold voltage to a control voltage offset, to provide a threshold-voltage-compensated signal for controlling the gate of the at least one of the pull up and pull down transistors. This provides threshold voltage sampling, in particular for the thin film transistor whose threshold voltage drift must be compensated (for example the pull-down thin film transistor). | 07-29-2010 |
Evgueni Boiko, Surrey GB
| Patent application number | Description | Published |
|---|---|---|
| 20090167749 | DISPLAY DRIVER METHOD AND APPARATUS - A method of providing an LCD overdrive drive scheme, which comprises measuring a stabilized transmission level of an LCD display pixel corresponding to a target drive level. An overdrive transmission level is measured corresponding to an overdrive drive level. The measured overdrive transmission level is compared with the measured stabilized transmission level to determine if the overdrive drive level is too high or too low. An iterative process then changes the overdrive drive level until a suitable overdrive drive level is found. This is used to derive overdrive drive scheme parameters which are stored in a memory of the LCD device. This method enables an overdrive scheme to be determined during use of the device. It can therefore take account of temperature and display ageing, without the effects of these being modeled. | 07-02-2009 |
Igor Boiko, Calgary CA
| Patent application number | Description | Published |
|---|---|---|
| 20100292813 | Method and Apparatus for Tuning a PID Controller - In tuning a PID controller for a process in a feedback control system, a method is provided for bringing the system into symmetric self-excited oscillations for measuring the frequency and the amplitude of the oscillations, and tuning the controller in dependence on the measurements obtained. A control algorithm (modified relay feedback test) is introduced into the system in series with the process to excite self-excited oscillations in the system. Data and formulas are given for the computation of the specific parameter of the modified relay feedback test and for tuning the parameters of the PID controller. An apparatus for performing the method is disclosed. | 11-18-2010 |
Mikhail Boiko, Calgary CA
| Patent application number | Description | Published |
|---|---|---|
| 20100292813 | Method and Apparatus for Tuning a PID Controller - In tuning a PID controller for a process in a feedback control system, a method is provided for bringing the system into symmetric self-excited oscillations for measuring the frequency and the amplitude of the oscillations, and tuning the controller in dependence on the measurements obtained. A control algorithm (modified relay feedback test) is introduced into the system in series with the process to excite self-excited oscillations in the system. Data and formulas are given for the computation of the specific parameter of the modified relay feedback test and for tuning the parameters of the PID controller. An apparatus for performing the method is disclosed. | 11-18-2010 |
Natalia Boiko, Calgary CA
| Patent application number | Description | Published |
|---|---|---|
| 20100292813 | Method and Apparatus for Tuning a PID Controller - In tuning a PID controller for a process in a feedback control system, a method is provided for bringing the system into symmetric self-excited oscillations for measuring the frequency and the amplitude of the oscillations, and tuning the controller in dependence on the measurements obtained. A control algorithm (modified relay feedback test) is introduced into the system in series with the process to excite self-excited oscillations in the system. Data and formulas are given for the computation of the specific parameter of the modified relay feedback test and for tuning the parameters of the PID controller. An apparatus for performing the method is disclosed. | 11-18-2010 |
Oleksandr P. Boiko, Kyiv UA
Vladimir Nikolaevich Boiko, Kiev UA
| Patent application number | Description | Published |
|---|---|---|
| 20090143604 | Synthesis of hydrofluoroalkanols and hydrofluoroalkenes - Described herein is a process for the manufacture of hydrofluoroalkanols of the structure R | 06-04-2009 |