24 results about "Overdrive voltage" patented technology

The invention discloses a depth compensation method of a direct time of flight (dTOF) sensor and electronic equipment, and is suitable for the technical field of computer application. The method comprises: in response to a trigger operation on a camera application, driving a dTOF sensor to acquire original image data (201); acquiring a current actual driving voltage of a single photon avalanche diode (SPAD) in the dTOF sensor (202); acquiring a current expected driving voltage of the SPAD (203); and performing depth compensation on the original image data according to the actual driving voltage and the expected driving voltage to generate a target depth map (204). Therefore, the depth information offset caused by the adjustment error of the SPAD driving voltage is corrected through the deviation between the actual value and the theoretical value of the SPAD driving voltage, so that the accuracy of the depth information collected by the dTOF sensor is improved, and the distance measurement precision of the dTOF sensor is improved.

The present application relates to a pixel driving method, a display device, a timing controller and a storage medium. The method is applied to the timing controller, and the method comprises the following steps: receiving an image to be displayed, and generating first voltage data according to the image to be displayed pixel by pixel; when processing a current pixel row, judging whether the first voltage data is same as second voltage data, wherein the second voltage data is voltage data sent by the timing controller to a pixel driver when processing a previous pixel row; if the first voltage data is same as the second voltage data, sending the first voltage data to the pixel driver; if the first voltage data is not same as the second voltage data, obtaining third voltage data from a preset overdrive voltage table, and sending the third voltage data to the pixel driver. The pixel driving method can solve the problem that when the current row triggers the line OD, the next row data is same as the current row data, the line OD is not triggered, and the next row cannot reach the target gray scale, thereby improving the charging problem caused by the opening of the line OD function.

The invention provides an LCD liquid crystal display screen color correction control method and system, and relates to the technical field of LCD liquid crystal display screen color correction control, a display area of an LCD liquid crystal display screen is divided into a plurality of logic areas, and a driving busy index is calculated in real time for each logic area. And then, converting the driving busy index into a corresponding compensation adjustment coefficient, dynamically adjusting the basic overdrive voltage of the target pixel based on the coefficient, and finally applying the adjusted target overdrive voltage to the liquid crystal molecules to correct the deflection force. According to the method, the problem of inaccurate overdrive compensation value caused by non-uniform panel temperature and dynamic change in the prior art can be effectively solved, and reverse smear and residual smear are avoided.

The invention provides an overdrive adjusting system and a display device. The sampling unit is used for collecting the environment temperature of the display panel and outputting sampling voltage; the comparison unit is used for comparing the sampling voltage with a plurality of preset reference voltages and outputting a temperature state signal; the time sequence control chip is used for calling a corresponding overdrive table from pre-stored overdrive tables based on the temperature state signal so as to adjust an overdrive voltage value of a data signal of the display panel; wherein the temperature state signal is a binary code. The sampling voltage is compared with the multiple preset reference voltages to obtain the temperature state, and the corresponding overdrive table is called based on the temperature state, so that different overdrive tables can be obtained corresponding to different temperatures, the display panel obtains corresponding overdrive voltage values under different temperature conditions, and the display effect of the display panel is improved. The phenomenon of smear or black smear is avoided, and the stability of the displayed image quality is ensured.

An electronic device includes: a display; a battery; and a boost circuit to receive power from the battery and to supply a driving voltage to the display. The boost circuit includes: a first switching device connected to a first node; a second switching device connected to the first node; an inductor between an input terminal of the boost circuit and the first node; an output capacitor to generate a DC overdrive voltage by smoothing an AC current generated by the first switching device and the second switching device; a blocking device to block a leakage current of the battery; and a control circuit to control the overdrive voltage by controlling the blocking device, based on a system voltage that is equal to or greater than a threshold voltage, and wherein the system voltage is an input voltage of the boost circuit.

A system includes a memory device and a processing device, operatively coupled with the memory device, to perform operations including: receiving a request to perform a memory access operation on a set of cells associated with a wordline of the memory device; determining that a temperature associated with the memory device satisfies a threshold criterion; determining a memory access operation type of the memory access operation; and performing the memory access operation on the set of cells associated with the wordline using a first time sense parameter, wherein the first time sense parameter corresponds to the memory access operation type and the temperature associated with the memory device.

Devices, systems, and methods are provided for generating a high, dynamic voltage boost. An integrated circuit (IC) includes a driving circuit having a first stage and a second stage. The driving circuit is configured to provide an overdrive voltage. The IC also includes a charge pump circuit coupled between the first stage and the second stage. The charge pump circuit is configured generate a dynamic voltage greater than the overdrive voltage. The IC also includes a bootstrap circuit coupled to the charge pump circuit, configured to further dynamically boost the overdrive voltage of the driving circuit.

The invention discloses a multi-valued storage oriented 2T0C DRAM (Dynamic Random Access Memory) read-write method and system, and relates to the technical field of multi-valued storage, and the method comprises the following steps: adopting a multi-valued current source, and transmitting preset write-in current matched with to-be-written-in data to all target storage units needing to write in the same to-be-written-in data in a 2T0C DRAM storage array; the write-in transistor and the read transistor in the target storage unit share the same bit line; all the target storage units generate respective storage node voltages in a self-adaptive manner by combining the threshold voltages of respective reading transistors on the basis of the preset write-in current, so that the overdrive voltages of the target storage units are the same; the overdrive voltage uniquely corresponds to the to-be-written data; when the data are read, the read current on the bit line is detected to obtain the storage data; the read current is uniquely determined by the overdrive voltage. The method is used for solving the influence of threshold voltage fluctuation on multi-value storage accuracy in the prior art.

The invention provides an LCD liquid crystal display screen response time optimization method and system, and relates to the technical field of LCD liquid crystal display screen response time optimization, and the method comprises the steps: determining the current display context state information through obtaining the operation environment information and user operation intention information of an LCD liquid crystal display screen; generating a core compensation coefficient of which the data volume is not greater than 50 bytes based on the state information, and sending the core compensation coefficient to a driving IC through a display serial interface; and the driving IC autonomously calculates an overdrive voltage compensation value according to the received core compensation coefficient and a pre-stored basic compensation rule, generates a driving voltage according to the overdrive voltage compensation value, and applies the driving voltage to a corresponding pixel electrode of the liquid crystal panel. According to the invention, the operation environment and the user intention are sensed in real time, and the core compensation information is transmitted to the driving IC for autonomous calculation, so that the dynamic and fine adjustment of the overdrive voltage is realized, and the response speed and the display quality of the display screen under variable working conditions are improved.

The application provides a post driver and a chip with overdrive capability. A first biasing circuit is configured to provide a first voltage offset between an output of the post driver and a gate of a first P-channel metal-oxide-semiconductor (PMOS) transistor of a pull-up circuit when the pull-up circuit is enabled. A second biasing circuit is configured to provide a second voltage offset between the output of the post driver and a gate of a first N-channel metal-oxide-semiconductor (NMOS) transistor of a pull-down circuit when the pull-down circuit is enabled. Thus, both the PMOS transistor in the pull-up circuit and the NMOS transistor in the pull-down circuit are well protected despite being powered by overdrive voltage.

The invention provides a method for generating overdrive voltage based on the temperature of a panel. The panel comprises a controller and a pixel circuit. The method comprises the steps that a built-in temperature detector of the controller senses the temperature of the panel to generate a sensed temperature value; the controller generates an overdrive voltage according to the sensed temperature value and the search information. The controller outputs the overdrive voltage to the pixel circuit.

The application provides an LCD liquid crystal display screen color correction control method and system, and relates to the technical field of LCD liquid crystal display screen color correction control. The display area of the LCD liquid crystal display screen is divided into multiple logical areas, and the driving busy index is calculated in real time for each logical area. Then, the driving busy index is converted into a corresponding compensation adjustment coefficient, and the basic overdrive voltage of a target pixel is dynamically adjusted based on the coefficient, and finally the adjusted target overdrive voltage is applied to the liquid crystal molecules to correct the deflection force. The method can effectively solve the problem of inaccurate overdrive compensation value caused by uneven and dynamic changes in panel temperature in the prior art, and avoid the generation of reverse ghosting and residual ghosting.

A method for generating overdriving voltage based on temperature of panel is disclosed. The method includes the following steps. A built-in temperature detector of a controller senses temperature of the panel to generate a sensing temperature value. Alternatively, the controller calculates a sensing temperature value, according to lookup information and raw data. The raw data is obtained according to touch sensing signals output from multiple touch sensors. Then, the controller generates an overdriving voltage, according to the sensing temperature value and another lookup information. The controller outputs the overdriving voltage to the pixel circuit.

This application discloses a driving method, driving circuit, and display device. The driving method includes the following steps: temporarily storing the pixel voltage of the previous frame and acquiring the pixel voltage of the current frame; adjusting the overdrive voltage before data line transmission to determine a charge / discharge threshold parameter; calculating the pixel voltage difference between the two frames and comparing it with the charge / discharge threshold parameter; performing a charge / discharge operation based on the comparison result, wherein charging / discharge is triggered when the voltage difference is higher than the charge / discharge threshold parameter, and not performed when it is lower than or equal to the charge / discharge threshold parameter; and synchronously controlling the execution timing of the above steps based on the timing of the display panel's working mode. This application accurately determines the charge / discharge requirement based on the actual pixel voltage change state, determines the threshold by adjusting the overdrive voltage before data line transmission, and performs charging / discharge only when the pixel voltage change exceeds the threshold, thereby eliminating invalid charging / discharging at the source and reducing invalid charging / discharging losses.

In various examples, optimal response time compensation (RTC) parameters may be determined for a display panel—such as a liquid crystal display (LCD) panel—based on sensor data. For instance, the disclosed systems and methods may calibrate optimal RTC parameters by using one or more sensors to generate sensor data while causing a display to render one or more images. The sensor data may be indicative of luminance values associated with at least one pixel of the display during a transition of the pixel from a first color value to a second color value. Using the sensor data, an optimal level of an overdrive voltage / RGB value may be determined for transitioning the pixel from the first color value to the second color value. Additionally, in some instances the overdrive may be determined in perceptual space by mapping the luminance values to perceptual brightness values.

The invention belongs to the technical field of display driving, and particularly relates to a pixel driving circuit, a pixel array, a display panel and a pixel driving method. The target voltage storage module is configured to be connected with the scanning line and the data line and is used for storing a target voltage under the action of a scanning signal output by the scanning line and a data signal output by the data line; the overdrive voltage storage module is configured to be connected with the scanning line and is used for storing overdrive voltage under the action of a scanning signal output by the scanning line; wherein the overdrive voltage is different from the target voltage; and the voltage switching module is configured to be respectively connected with the target voltage storage module, the overdrive voltage storage module and the liquid crystal capacitor, and is used for firstly controlling the overdrive voltage storage module to apply the overdrive voltage to the liquid crystal capacitor and then controlling the target voltage storage module to apply the target voltage to the liquid crystal capacitor in a frame period. On the premise that the field sequence driving time sequence is not changed, overdrive operation is achieved.

A non-volatile storage apparatus continuously maintains unselected word lines for multiple regions in multiple blocks at one or more overdrive voltages and continuously maintains unselected select lines for multiple regions in multiple blocks at one or more unselected voltages while performing a read process for non-volatile memory cells in one or more regions of one or more blocks of the same die, without lowering those signals to ground or another resting voltage. Selected word lines are separately temporarily toggled to a read reference voltage to enable reading and then reverted back to an overdrive voltage upon completion of the reading. Selected select lines are separately temporarily toggled to a select voltage to enable reading and then reverted back to an unselected voltage upon completion of the reading.

The present invention relates to a device (100) for protecting a circuit connected to a power supply network, in particular to a vehicle power supply network, against overvoltages; comprising an electrical input (125) for applying an input voltage; an electrical output (130) for providing an electrical output voltage to the power supply network or to the connected circuit; and an electrical protection circuit with a detection section (135), a semiconductor switch (T109) and a limiting section (140); wherein the semiconductor switch (T109) is arranged between the electrical input (125) and the electrical output (130) and can be controlled such that the output voltage at the electrical output (130) can be interrupted;wherein the detection section (135) is configured to control the semiconductor switch (T109) by means of a drive voltage when a threshold value of the input voltage is reached, such that the output voltage is interrupted; wherein the detection section (135) comprises a voltage threshold detector element (D103), for example a Zener diode (D103); and wherein the limiting section (135) is configured to limit the drive voltage for the semiconductor switch (T109) when the output voltage is interrupted; wherein the limiting section (135) comprises a current-impressing component (T101, T103) for limiting a current flowing through the voltage threshold detector element (D103).

A non-volatile memory device continuously maintains unselected word lines for multiple regions in multiple blocks at one or more overdrive voltages and maintains unselected select lines for multiple regions in multiple blocks at one or more unselected voltages while a read process is performed on non-volatile memory cells in one or more regions of one or more blocks of the same device, without driving these signals to ground or any other quiescent voltage. To enable the read, selected word lines are separately and temporarily switched to a read reference voltage and then reset to an overdrive voltage after the read is complete.To enable reading, selected selection lines are temporarily switched to a selection voltage separately, and then switched back to a non-selected voltage after the reading is complete.

A system includes a memory device and a processing device, operatively coupled with the memory device, to perform operations including: receiving a request to perform a memory access operation on a set of cells associated with a wordline of the memory device; determining that the wordline is disposed on a first deck of the memory deck; responsive to determining that the wordline is disposed on the first deck, determining that the wordline is associated with a first group of wordlines associated with the first deck; and responsive to determining that the wordline is associated with the first group of wordlines associated with the first deck, performing the memory access operation on the set of cells connected to the wordline using a first time sense parameter, wherein the first time sense parameter corresponds to the first group of wordlines associated with the first deck.

The invention relates to an LLC half-bridge switching power supply secondary side driving voltage compensation circuit and method, and the circuit comprises a secondary side driving voltage input module, a driving voltage detection circuit module, and a grid voltage lifting circuit module which is provided with a switching tube QN1, receives an electric signal outputted by the driving voltage detection circuit module, and outputs the electric signal to the driving voltage detection circuit module. And the driving voltage VF of the secondary side driving voltage input module is adjusted through the on-off state of the driving switch tube. According to the embodiment provided by the invention, whether the driving voltage VF output by the secondary side driving voltage input module is attenuated or not can be monitored, identified and judged through the driving voltage detection circuit module, and when the driving voltage VF is attenuated, the driving voltage VF is correspondingly compensated through the gate voltage lifting circuit module, so that the driving voltage VF can be accurately adjusted. Therefore, the situation that circuit devices are overheated and damaged due to insufficient driving voltage VF is effectively prevented, and the reliability of the whole system is remarkably improved.

This application provides a method and system for optimizing the response time of an LCD display screen, relating to the field of LCD display screen response time optimization technology. By acquiring the operating environment information and user operation intent information of the LCD display screen, the current display context state information is determined. Based on this state information, a core compensation coefficient with a data size not exceeding 50 bytes is generated and sent to the driver IC via a display serial interface. The driver IC autonomously calculates the overdrive voltage compensation value according to the received core compensation coefficient and pre-stored basic compensation rules, and accordingly generates the driving voltage applied to the corresponding pixel electrodes of the LCD panel. This application, by sensing the operating environment and user intent in real time and transmitting the core compensation information to the driver IC for autonomous calculation, achieves dynamic and refined adjustment of the overdrive voltage, improving the response speed and display quality of the display screen under varying operating conditions.

A display device includes: a display panel including a pixel to receive a driving voltage through a driving voltage line; a panel driver to drive the display panel; a voltage generator to generate the driving voltage, and determine a voltage level of the driving voltage based on a voltage control signal; a driving controller to control a driving of the panel driver, and supply the voltage control signal to the voltage generator; and a voltage detector between the voltage generator and the driving voltage line, and to sense a sensing voltage corresponding to a current flowing into the driving voltage line, and output a sensing signal based on the sensing voltage. The driving controller is to: receive the sensing signal from the voltage detector; and generate the voltage control signal based on the sensing signal.

A non-volatile memory device continuously maintaining unselected word lines of a plurality of regions of a plurality of blocks at one or more overdrive voltages and selecting unselected select lines of a plurality of regions of a plurality of blocks when performing a read process for non-volatile memory cells in one or more regions of one or more blocks of the same die One or more unselected voltages are continuously maintained without reducing those signals to ground or another static voltage. The selected word lines are individually temporarily switched to a read reference voltage to enable reading, and then return to the overdrive voltage upon completion of the reading. The selected select lines are individually temporarily switched to a select voltage to enable reading, and then return to an unselected voltage upon completion of the reading.