15results about How to "Stable brightness" patented technology

The invention relates to the technical field of bus control, in particular to a method and system for controlling and monitoring landing light based on a CAN bus. The method comprises the following steps: setting a light control node in an aircraft landing light system, and performing control network connection and landing light local response control on the light control node and a central control unit by using a CAN bus protocol to generate a landing light local response control instruction; starting corresponding landing light in an aircraft landing light system according to the landing light local response control instruction, performing light condition real-time monitoring and judgment analysis, and if the landing light is determined to be in an on-light state, performing brightness non-uniformity control management so as to execute on-state brightness non-uniformity control work; and if it is determined that the landing light working state is a closed state, light operation fault control management is carried out to execute closed state fault adjustment control work. The intelligent level of the landing light control system can be improved.

The utility model discloses a steering lamp control circuit, which relates to the technical field of automobile signal lamp control, and comprises a driving circuit, a signal lamp control circuit and a signal lamp control circuit, the steering lamp control circuit is used for controlling the input level of the driving circuit; the driving circuit comprises a first triode, a second triode and a third triode, wherein the first triode is communicated with the steering lamp control circuit through a base; when the steering lamp control circuit outputs a high level, the first triode is conducted; and the second triode is used for being connected with the collector electrode of the first triode through a base electrode and connected with the steering lamp LED lamp group through the collector electrode. According to the utility model, the turning-on and turning-off of the LED lamp group of the steering lamp can be effectively controlled, the accurate transmission of steering signals is ensured, and the stability and safety of the circuit are ensured at the same time.

The invention discloses a display device. The display device comprises a plurality of pixel circuits, a time schedule controller and a plurality of display driving circuits. The pixel circuits are divided into a plurality of pixel groups, and each of the pixel groups has a first color light emitting diode, a second color light emitting diode, and a third color light emitting diode. The timing controller provides a plurality of display data. The display driving circuit correspondingly drives the pixel circuits in the corresponding pixel groups to sequentially light one of the first color light emitting diode, the second color light emitting diode and the third color light emitting diode in a plurality of lighting periods based on the corresponding display data. During each lighting period, the pixel group alternately lights a portion of the first color light emitting diodes, a portion of the second color light emitting diodes, and a portion of the third color light emitting diodes.

The embodiment of the invention discloses a double-screen brightness adjusting method and device based on a domestic operating system and a storage medium, and the method comprises the steps: determining whether a scene is a double-screen comprehensive use scene or not based on an activity region and an activity duration of a mouse, and determining a main screen and an auxiliary screen when the scene is the double-screen comprehensive use scene; the screen brightness of the main screen and the auxiliary screen is inquired, and the current remaining power of the notebook computer is inquired; and generating a brightness adjusting curve according to the current residual electric quantity, the screen brightness of the main screen and the auxiliary screen and preset standard brightness, and adjusting the brightness of the main screen and the auxiliary screen according to the brightness adjusting curve. According to the technical scheme, the brightness can be adjusted more gently, meanwhile, the energy-saving effect can be achieved, the service life of the double-screen notebook computer is prolonged, and the method is particularly suitable for application scenes where main and auxiliary screens are switched frequently.

The invention discloses a control method and device for a color temperature breathing light supplement lamp, and belongs to the technical field of illumination control. The method comprises the steps that a color temperature control curve is generated according to a preset periodic function, the color temperature control curve represents the change relation of the color temperature proportion along with time, and the color temperature proportion is the proportion of the cold light quantity in the total light quantity; periodically updating a color temperature proportion value corresponding to the current moment according to the color temperature control curve; respectively calculating driving parameters of the cold light emitting unit and the warm light emitting unit according to the color temperature proportion value; and controlling the output of the cold light emitting unit and the warm light emitting unit according to the driving parameters, so that the output color temperature of the light supplementing lamp is periodically and cyclically changed within a preset color temperature range. Breathing control and color temperature control are combined, alternate, continuous and cyclic change of color temperature is achieved, and the playing method of the light supplementing lamp is enriched.

This invention provides a data preprocessing method to ensure balanced brightness in tone-mapped output images. The method combines the characteristics of HDR synthesis with the relationship between exposure ratio and theoretical maximum value of the synthesized HDR image as a reference for preprocessing operations. This allows tone mapping to adapt to various complex environments and maintain stable output brightness, enhancing the adaptability and robustness of the tone mapping process.

The invention relates to the technical field of automobile illuminating lamps, and discloses a headlamp driving circuit based on constant current driving and a headlamp, and the headlamp driving circuit comprises a headlamp input unit which is suitable for being connected with a whole vehicle power supply to obtain a first power supply signal; the constant current detection unit is configured to perform voltage detection on the first power supply signal and generate a switching signal under the condition that a detection result is lower than a voltage limit value; the boost topology unit is configured to perform boost processing on the first power supply signal and output a boosted second power supply signal; and the power supply switching unit is configured to cut off the connection between the whole vehicle power supply and the headlamp according to the switching signal, and connect the boost topology unit with the headlamp so as to provide the second power supply signal to the headlamp for lightening. According to the invention, through voltage detection and boost processing and in combination with the power supply switching unit, continuous and stable lighting of the LED is ensured.

The invention relates to a miniaturized large-target-surface projection lens. Comprising a first lens with positive focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with positive focal power which are sequentially arranged in the direction of an optical axis. An eighth lens with positive focal power, a ninth lens with negative focal power, a tenth lens with positive focal power, an eleventh lens with negative focal power, a twelfth lens with positive focal power and a thirteenth lens with positive focal power; the focal length and the total length of the miniaturized large-target-surface projection lens are reasonably set, so that the lens is small in size, high in resolution and large in image surface, meets the strict use requirements in the environment of-40 DEG C to 85 DEG C, and is high in mass production yield.

The disc player with the aromatherapy atmosphere lamp comprises a disc player shell, the atmosphere lamp and aromatherapy are arranged on the shell, the atmosphere lamp is used for adjusting the color and brightness according to the playing action of the disc player, the aromatherapy is used for emitting fragrance, and the aromatherapy is fireless aromatherapy; a controller is arranged in the shell, the controller is connected with external playing equipment through a 485 communicator, and the controller is connected with an atmosphere lamp through a trigger; the controller is also connected with a timer, a voltage stabilizer and an instruction input device, the timer is used for recording the working time of the disc player, the voltage stabilizer is used for providing stable power supply voltage for the controller, and the instruction input device is used for transmitting a control instruction to the controller so as to adjust the color and the brightness of the atmosphere lamp.

The invention discloses a display panel and a driving method thereof. The display panel comprises a pixel circuit. The pixel circuit comprises a data writing module, a driving module, a light emitting module and a storage module, the data writing module is connected between the data line and the control end of the driving module; the first end of the driving module is connected with the first power supply; the second end of the driving module is connected with the light-emitting module; the driving module is used for generating driving current. The light-emitting module responds to the driving current to emit light. The first end of the storage module is connected with the control end of the driving module, and the second end of the storage module is connected with a compensation signal; the compensation signal is a sawtooth wave signal, one period of the compensation signal comprises a first ramp signal and a second ramp signal, and in one period of the compensation signal, the duration of the first ramp signal is longer than that of the second ramp signal; the change direction of the voltage in the first ramp signal is different from the change direction of the holding voltage of the first end of the storage module. According to the technical scheme, the display effect of the display panel is improved.

The invention discloses a control method and device of a display panel and display equipment, and the method comprises the steps: carrying out the scanning of a next frame of image according to an image refreshing frequency corresponding to a first frequency switching instruction when the first frequency switching instruction is received; the first frequency switching instruction is used for switching the image refreshing frequency from high frequency to low frequency; wherein the voltage of a compensation voltage signal provided for a driving tube in the pixel circuit is kept at a first compensation voltage value during the first holding frame duration after frequency switching; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of other holding frames except the first holding frame after frequency switching of the compensation voltage signal. By adopting the scheme, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is increased, so that the display brightness of the driving tube in the pixel circuit during the first frame keeping duration after frequency switching can be improved, the brightness change caused by the state change of the driving tube when the high frequency is switched to the low frequency is avoided, and the display quality of the pixel circuit is improved. And straight cutting and no flicker are realized.

The utility model discloses a crop leaf phenotype nondestructive acquisition black box which comprises a non-transparent box body, a light source and a shading curtain, a top plate, a bottom plate, a rear end plate and two side plates define a square box structure with an opening in the front end, the opening in the front end is a leaf stem inlet, a shooting window is formed in the top plate, a plant stem channel is formed in the bottom plate, light sources are arranged on the upper portions of the inner walls of the side plates, and a shading curtain is arranged at the upper end edge of the opening in the front end of the box. The shading curtain can cover an opening in the front end of the box body after hanging down, a rope is fixedly arranged outside the box body, the device is reasonable in structural design and convenient to carry and operate, site shooting can be conducted through shooting equipment without picking leaves, and the collecting precision and efficiency can be improved.

The light sensation detection clamp comprises a workbench, a fixing plate, a connecting piece and an Aoled light source, one side of the connecting piece is connected with the workbench, the other side of the connecting piece is connected with the fixing plate, and therefore the fixing plate can cover the workbench in a turnover mode. A module testing groove is formed in the covering face of the fixing plate and the workbench, and the AAM light source is arranged on the workbench and illuminates a to-be-tested module in the module testing groove. Compared with the prior art, the LED lamp is replaced with the AAM light source, the change amplitude of the resistance of the AAM light source along with the temperature change is not obvious, and due to the self-luminous characteristic of the AAM light source, light rays are high in brightness, white and stable in brightness, and the AAM light source is better than the LED lamp in function. Therefore, when the light-sensitive IC is tested, the Aoled light source can change the brightness to illuminate the light-sensitive IC, so that the test data is more accurate, and the accuracy of the test result of the light-sensitive IC is improved.

The utility model discloses a kind of low temperature drift's multi-channel LED constant current drive circuit with temperature compensation function, including voltage input end, LED load, constant current drive circuit and temperature compensation circuit, temperature compensation circuit is provided with NTC thermistor R9 and triode Q8, utilize common constant current drive circuit to realize the constant current drive to LED load, make the luminous intensity of LED stable, LED's luminous intensity will not appear with the fluctuation of input voltage and increase or reduce, and add temperature compensation circuit, cooperate constant current drive circuit, not only can be realized when the use environment temperature changes, the current size of LED is always unchanged, almost no temperature drift, the brightness of LED becomes extremely stable, moreover, the current value precision of lighting to stable state is extremely high, basically no error, by setting the maximum current value required under high temperature and the parameter of each component of temperature compensation circuit, the brightness when LED just lights up can also be accurately set, to realize current compensation function.

The invention discloses a calibration device for a laser optical sighting telescope, and relates to the technical field of optical sighting telescopes, the calibration device comprises an optical sighting telescope main body of a cylindrical hollow rod structure, and the outer wall of one side of the optical sighting telescope main body is fixedly connected with an optical lens group used for focusing and adjusting light beams. An optical window used for observing the alignment condition of a target and a laser spot is fixedly connected to the outer wall of the end, away from the optical lens set, of the optical sighting telescope body, a protection structure used for protecting internal components is fixedly connected to the outer wall of the laser transmitter, and a light path guiding mechanism is arranged at the bottom end of the interior of the protection structure. Light intensity feedback mechanisms are arranged on the two sides of the inner wall of the protection structure, a light speed expansion mechanism is arranged on the outer wall of one end of the protection structure, the multi-point adjustment function can be provided through mutual cooperation of the connecting plate and the adapter plate and the light path guiding mechanism, correction of the direction deviation of the light beams is facilitated, and it is ensured that the light beams are transmitted along a preset path.