52results about How to "Reduce glow time" patented technology

The invention discloses a backlight module, a control method thereof and a display device. The backlight module comprises a backlight source composed of a plurality of light emitting devices arranged in a matrix mode. The backlight source comprises a plurality of light emitting regions. A display panel comprises a plurality of display regions. The display regions correspond to the light emitting regions one to one; the backlight module further comprises a backlight control module; when the backlight control module is scanned at the display regions of the display panel, light emitting devices inside the light emitting regions corresponding to the display regions are controlled to emit light. By dividing the backlight source, time-sharing driving is performed, in other words, when the regions, corresponding to the light emitting regions, of the display panel are scanned, the light emitting devices inside the light emitting regions are controlled to emit light, and the light emitting regions corresponding to the regions, not scanned, in the display panel do not emit light, so that the light emitting time of each light emitting device in the backlight source is greatly shortened, a large amount of electric energy is saved, and due to time-sharing driving of the light emitting regions, crosstalk between the left and right eyes can be reduced during 3D scanning.

The invention discloses a Raman lidar calibration device and a calibration method thereof. The device is characterized in that the output end of a receiving fiber (13) is sheathed with a camera obscura (11), and the side surface of the output port of the receiving fiber (13) is provided with luminescent spectrum range covering nitrogen and a luminous diode (1) of the spectral band of gas to be calibrated; the receiving fiber (13) and the light path of the luminous diode (1) are provided with a collimation lens (10) and a beam splitting sheet (5); the reflective light path of the beam splitting sheet (5) is provided with a first optical filter (3) and a first detector (2); and a transmission light path is provided with a second optical filter (7) and a second detector (6). The method is as follows: the light intensity P1 of the spectral band of gas to be calibrated and the light intensity P2 of the nitrogen which are obtained by the first detector (2) and the second detector (6) as well as I lambda N and I lambda X in the intensity expression are substituted into a Raman lidar equation to obtain the density distribution of the gas to be calibrated. The device has simple structure and convenient use and can be used for the quantitative measurement of atmospheric parameters.

The invention relates to a gas scintillation based fission neutron detector. The detector comprises a detector barrel, an entrance window hermetically arranged at the front end face of the detector barrel, an exit window hermetically arranged at the rear end face of the detector barrel, two quartz windows arranged at two lateral surfaces of the detector barrel, at least two target stands fixed in the detector barrel, fission targets suspended on the corresponding target stands, two photoelectric detectors arranged outside the two quartz windows respectively, a charging tool communicated with the detector barrel, and scintillation gas filled in a barrel core; and the scintillation gas adopts inert gas or nitrogen. The gas scintillation based fission neutron detector solves the technical problems of low neutron/gamma resolving power and low neutron sensitivity in the conventional neutron detector, and has the advantages of smooth fast neutron energy response and quick time response.

The invention discloses a pixel circuit, a drive method therefor, an array substrate and a display device, and belongs to the technical field of display. The pixel circuit includes a drive module anda switch module, wherein the switch module is connected in series with a drive transistor in the drive module, and the switch module and the drive transistor in series connection are respectively connected with a power signal line and a light emitting unit. The drive module is also respectively connected with a gate line and a data line, and is used for providing a power signal from the power signal line for the light emitting unit through the drive transistor under the control of a gate drive signal provided by the gate line and a data signal provided by the data line. The switch module is also connected with a switching signal line, for controls the connection and disconnection between the power signal line and the light emitting unit under the control of a switching signal provided by the switching signal line. The pixel circuit provided by the invention can avoid dynamic smear when the display device displays a dynamic image, and the display device has a better display effect.

The invention discloses a display apparatus. The display apparatus comprises a format converter and a display panel, wherein the format converter is used for obtaining each original data frame and performing format conversion on the original data frames for converting into conversion data frames in different formats; and when each conversion data frame converted through the format converter is obtained, a part of the pixel units of the display panel emit light, and the other part of the pixel units of the display panel do not emit light. The invention also discloses a driving method of a display apparatus. Through such a mode, the luminescence time of the pixel units of the display panel can be reduced, and the aging speed of the display panel is effectively alleviated.

The invention discloses a current-controlled display panel driving method applied to a display panel with OLED devices, which comprises data signals composed of a plurality of line scanning signals and used for providing a driving control current. Each line scanning signal controls the light-emitting time of each line of the OLED devices. The plurality of line scanning signals are sequentially triggered in turn. Each of the line scanning signals provides an initial signal to control the corresponding OLED devices to emit the light and also provides an ending signal to control the corresponding OLED devices to stop the light-emitting process. The duration of the light-emitting time of the corresponding OLED devices can be controlled through adjusting the time interval between the initial signal and the ending signal. According to the technical scheme of the invention, signals for controlling the light-emitting time of the OLED devices are added in the line scanning signals. In this way, the light-emitting time of the OLED devices is reduced according to the display requirement of low brightness (low gray). Therefore, the defect of response delay due to the long charging time in the low-brightness (low-gray) driving condition can be overcome.

The invention discloses a driving method of a display panel, the display panel and a display device. The driving method of the display panel comprises the following steps: in a first light emitting phase, light emitting control circuits in at least one light emitting control circuit group output first light emitting control signals to an electrically connected pixel driving circuit, so as to control the pixel driving circuit to output a driving signal to an electrically connected organic light emitting element; and in a second light emitting phase, the light emitting control circuits in the atleast one light emitting control circuit group output the first light emitting control signals to the electrically connected pixel driving circuit, and the light emitting control circuits in the at least one light emitting control circuit group output second light emitting control signals to the electrically connected pixel driving circuit, so as to control the pixel driving circuit not to outputthe driving signal to the electrically connected organic light emitting element. By adoption of the driving method of the display panel disclosed by the invention, the organic light emitting elementis in a short-term DC bias light emitting state, thereby slowing down the polarization acceleration of an organic material, prolonging the service life of the organic light emitting element, and finally prolonging the service life of the display panel.

A color display is performed by carrying out a switching between a first driving system in which the OFF timing of a light source and the end timing of a data scanning agree with each other and a second driving system in which the OFF timing of a light source and the end timing of a data scanning do not agree with each other. In case where a response time of a liquid crystal from a transmission state to a light-shielding state is sufficiently short, a color display is performed by using the first driving system to decrease a light-emitting time of a light source. On the other hand, in case where the response time of the liquid crystal from the transmission state to the light-shielding state is increased, a color display is performed by using the second driving system.

The invention relates to a time-of-flight sensor and a distance measuring method thereof. The distance measuring method of the time-of-flight sensor comprises the following steps of: emitting pulse detection light to irradiate a detection field of view of the time-of-flight sensor; receiving the reflected light reflected by a measured object, and generating inductive charges corresponding to the energy of the reflected light; accumulating the inductive charges in a first charge accumulation window and a second charge accumulation window in sequence, wherein the window durations of the first charge accumulation window and the second charge accumulation window are the same, during long-distance detection, the pulse width of the pulse detection light is smaller than the window duration; and performing flight time calculation according to the charge quantities obtained by the first charge accumulation window and the second charge accumulation window so as to obtain distance information corresponding to the flight time. According to the method, power consumption is saved while long-distance distance measurement is achieved.

The invention provides a frequency conversion refreshing method, a pixel driving method, a frequency conversion refreshing device and electronic equipment. The frequency conversion refreshing method comprises the following steps of: when a picture refreshing frequency is changed from a first frequency to a second frequency, switching a control signal input into the pixel driving circuit from a first control signal corresponding to the first frequency to a second control signal corresponding to the second frequency; and enabling the pixel driving circuit to control a light emitting element to emit light according to the second control signal, wherein the first frequency is greater than the second frequency, the cut-off time of a light-emitting signal in the second control signal is longer than the cut-off time of a light-emitting signal in the first control signal, and a storage capacitor in the input pixel driving circuit is matched with the first frequency. Since the cut-off time of the light-emitting signal in the second control signal is longer than that of the light-emitting signal in the first control signal, the light-emitting time of the pixel driving circuit at a low frequency is shortened, and the splash screen problem during frequency switching in the prior art is solved.

An image display device is provided with a light emitting element; a driving transistor wherein a gate electrode, a source electrode and a drain electrode are provided and one edge of the light emitting element is electrically connected with one of the electrodes of the source electrode and the drain electrode; a first switching transistor, which short-circuits the gate electrode of the driving transistor and the one electrode of the driving transistor in response to a scanning signal; a capacitor element wherein a first electrode and a second electrode are provided and the gate electrode of the driving transistor is connected with the first electrode; a signal line connected with the second electrode of the capacitor element; a signal line driving circuit, which supplies the signal line with a brightness potential and a reference potential indicating a standard of the brightness potential; and a power source supplying circuit, which controls a potential of the other electrode of the source electrode and the drain electrode of the driving transistor.

The invention discloses a drive circuit and a driving method of a display array, relates to the technical field of display, and aims to meet high-resolution display requirements. The drive circuit ofthe display array comprises m rows * n columns of pixel driving units. Each pixel driving unit comprises a plurality of gray scale control periods in one driving period. The pixel driving unit comprises a gating transistor, a first driving transistor, a storage capacitor and a light emitting circuit, wherein the gating transistor is electrically connected with the control end of the first drivingtransistor and the storage capacitor respectively. And each gating transistor is used for writing m data signals into each storage capacitor in a one-to-one correspondence manner under the control ofm rows of scanning signals in each gray scale control time period. A first electrode of the first driving transistor is electrically connected with the light emitting circuit. The second electrode ofthe first driving transistor is grounded. And each first driving transistor is used for controlling each light emitting circuit to work under the control of m data signals in each gray scale control period.

Disclosed is a measurement method using a solar simulator which can shorten the light emission duration of a light source lamp and measure the output characteristics of a solar cell, even when said solar cell has slow response characteristics. Further disclosed is a solar simulator for implementing the measurement method. A measurement method using a solar simulator has: a step whereby one or more light sources are made to simultaneously emit a flash in which the top of the pulse waveform becomes level; and a step whereby a multi-point measurement of the current and voltage output from a solar cell to be measured is carried out by irradiating the flash onto the solar cell and sweeping the electronic load of the solar cell, while using an illuminance detector for illuminance control. The speed of instructions to an electronic load command is variably controlled in accordance with the response characteristics of the solar cell to be measured, and the current and voltage output from the solar cell are measured while the flash is irradiated onto the solar cell to be measured.

The invention discloses a display control method and head-mounted display equipment. The display control method is applied to the head-mounted display equipment. The head-mounted display equipment comprises a display card, a display screen and a liquid crystal light valve, wherein the liquid crystal light valve is located at a near-to-eye side of the display screen. The display control method comprises the steps of detecting a vertical synchronization signal outputted by the display card; and displaying a current frame image in a frame buffer memory of the display card on the display screen based on the vertical synchronization signal, and sequentially controlling multiple Bragg gratings on the liquid crystal light valve to be adjusted from a non-transparent state to a transparent state. The display control method is used for improving the delay of a low-refresh-rate LCD screen, and avoids the phenomena of smearing and blurring of the LCD screen.

An embodiment of the invention provides a display signal processing method and device and a self-luminous monitor and relates to the field of display. By the display signal processing method and device, display life of pixels in the self-luminous monitor can be prolonged, and display life of the self-luminous monitor is integrally prolonged. The display signal processing method includes steps of acquiring RGB (Red Green Blue) gray-scale values (X, Y, Z) of preset pixels, acquiring m groups of RGB display gray-scale values (Xi, Yi, Zi) according to the RGB gray-scale values (X, Y, Z) and preset m gray-scale coefficient groups (Ui, Vi, Wi), and outputting m groups of scanning gray-scale values for continuously scanning the preset pixels within a display period m times according to m groups of RGB display gray-scale value (Xi, Yi, Zi). The display signal processing method is used for processing display signals of the monitor.

A light pen which performs pointing on an image projected from a projector includes: a battery; a light emitting unit which intermittently emits light with electric power supplied from the battery; a remaining battery capacity detection unit which detects a remaining capacity of the battery; and a control unit which changes a light emission mode of the light emitting unit in such a way as to reduce an amount of light emitted from the light emitting unit, if the remaining capacity of the battery detected by the remaining battery capacity detection unit is equal to or lower than a predetermined threshold.

The embodiment of the invention discloses a display device. The display device includes: a display panel; and a logic temperature control unit, wherein the logic temperature control unit is connectedto a signal transmission path of a signal driving the display panel, and the logic temperature control unit is used for reducing the size of the signal on the signal transmission path or reducing theduty ratio of the signal on the signal transmission path when the environment temperature is higher than or equal to the preset temperature. The technical scheme provided by the invention is adopted,when the environment temperature is too high, the size of a signal on a signal transmission path for driving the display panel is reduced through the logic temperature control unit; the logic temperature control unit is used for reducing the size of a power signal or reducing the duty ratio of a signal on a signal transmission path for driving the display panel, for example, reducing the duty ratio of a light-emitting control signal, so as to reduce the ambient temperature and avoid long-term ghosting caused by continuous high-temperature display of the display device.