77results about How to "Brightness control" patented technology

The invention discloses an automatic dimming method and device of an infrared camera. The brightness of an LED (Light-Emitting Diode) lamp group is adjusted according to the brightness of the area of a moving target in a video picture, so that a sharp image of the most-concerned moving target is obtained. The brightness of an infrared lamp is adjusted by comparing the brightness of the area of the moving target with brightness of a background area as well as whether the moving target is over-exposed or over-dark, so that the brightness level of the infrared lamp can be accurately controlled, and the situation that the details of the moving target are vague caused by over-exposure or over-darkness of a future target is avoided. In the traffic field, only the judgment on whether to be over-exposed or over-dark is carried out on a license plate area instead of the judgment on the whole image, so that the brightness of the LED lamp group can be more accurately controlled to obtain useful details of a license plate. The invention has the advantages that photoelectric conversion of the LED lamp can be effectively controlled, the brightness of the LED lamp is intelligently controlled, the resolution ratio of the details of the moving target is effectively increased, the heat consumption of the infrared lamp is reduced and the service life of the whole device is prolonged.

Disclosed is a method for determining environmental brightness to appropriately control display brightness according to variations of the environmental brightness in different places in a mobile communication terminal including a camera having an automatic gain control (AGC) function, and a method for controlling the display brightness using the same, including the steps of calculating a luminance average of a center region of a photographed screen corresponding to an AGC reference region and a luminance average of an edge region except for the center region as brightness values from an image signal generated by photographing of the camera, comparing the brightness value of the edge region with a previously-set dark environmental critical value, comparing the brightness value of the center region with the brightness value of the edge region according to the comparison result, and determining that the environmental brightness is one of the bright state and the dark state, calculating a histogram of the luminance elements, and performing brightness contrast stretching, controlling the display brightness by adding or subtracting a previously-set control value to / from the brightness contrast stretched pixels according to environmental brightness determined by the method for determining the environmental brightness, and replacing the brightness-controlled luminance elements by the luminance elements of the image signal which will be transmitted to the display.

The invention provides an image enhancement method and system. The method includes: acquiring input brightness values, and calculating a logarithmic average value of the input brightness values; processing an input image on the basis of a Retinex image enhancement algorithm to obtain first brightness gain values; calculating and obtaining a brightness gain control factor according to the logarithmic average value of the input brightness values; calculating and obtaining second brightness gain values according to the brightness gain control factor and the first brightness gain values; and enhancing the input image according to the second brightness gain values to obtain an output image. According to the method, the Retinex image enhancement algorithm is adopted to enhance the input image, through adopting the brightness gain control factor, the first brightness gain values can be relatively highly compressed when image brightness is relatively low, and the first brightness gain values are relatively lowly compressed when the image brightness is relatively high, and thus brightness gain of a dark image can be enabled to become low; and effective control on brightness of the output image is realized, and the brightness of the output image can be enabled to be increased, and can also be enabled to accord with a real environment.

The invention discloses a method and a device for facilitating user self-timing. A flash light can rotate to a frontend intelligent terminal along with the rotation of a camera; when a user performing self-timing under the dark light is detected, the flash lamp is opened and continuously illuminated to provide stable brightness for the user, and an LED (light emitting diode) lamp of a screen is opened to provide light ray compensation for the user, so the sensory stimuli of single light source is weakened, the brightness of the flash lamp is controlled, and is close to the brightness of the screen, the comfortability of the user sensing the light source is further improved, and a good self-timing environment is created.

A projection device consists of light source module used to generate the first light beam, reflection module for receiving the first light beam and for reflecting the first light beam to be the second one as well as for forming the third one by passing partial light of the first reflection light beam through reflection module, projecting the second one to form an image by imaging module, sensing brightness of the third one by light transducer in order to output a sensing signal, outputting a control signal according to said sensing signal and controlling light source module to make the first light beam retain on a fixed brightness by control unit.

The invention discloses a backlight module which is provided with a light guide plate and a plurality of backlight sources, wherein the light guide plate is provided with a plurality of grooves; the grooves are used for dividing the light guide plate into a plurality of areas and are provided with special cross sections; and the cross sections can be triangular, trapezoidal or convex curved surfaces. By the special cross sections, the light guide plate can utilize the grooves to reflect light emitted by the backlight sources at a specific angle. Accordingly, the aim of local dimming of the backlight module can be achieved by the design of the positions of the grooves and the angles of the cross sections.

The invention discloses a brightness control method of an optical image detector, which is used for detecting an incident optical image when the light of a light source reflects an object, and controls the brightness of the light source according to the detected incident optical image. The optical image detector detects the light through an image sensor or an electric shutter, and an image processor or a system controller directly adjusts the brightness of the light source according to the detected incident optical image. According to the brightness control method of the optical image detector of the present invention, the image quality of the object can be improved by removing the image noise and residual image caused by insufficient brightness of the light source, and the consumption of power supply can be reduced by directly adjusting the brightness of the light source.

The present invention discloses a smart luminaire system and a control method of the smart luminaire system. The smart luminaire comprises a smart band a luminaire. The smart band comprises a housing, a sensor that is disposed in the housing and used for sensing a sleeping posture and actions of a user and that generates an action parameter, and a first communicator electrically connected to the sensor and used for sending the action parameter to the luminaire. The luminaire comprises a second communicator used for receiving the action parameter, a lamp bead, and a controller. The controller is electrically connected to the second communicator and the lamp beard, and used for generating a control instruction according to the action parameter to control brightness of the lamp bead. According to the technical scheme of the present invention, the smart luminaire system is used to control the brightness of the lamp bead according to the sleeping degree of a user.

The invention discloses an LED backlight partition current control method, a television terminal and a readable storage medium. Based on data of an image to be displayed, the original backlight brightness of each LED backlight partition and a corresponding brightness compensation coefficient are determined, the original backlight brightness of each LED backlight partition is adjusted based on theoriginal backlight brightness of each LED backlight partition and the corresponding brightness compensation coefficient, and the uniform brightness of each LED backlight partition is ensured. In addition, when the driving current of the LED backlight partition is higher than a preset current and the duration exceeds a preset threshold value, the current of the corresponding LED backlight partitionis reduced, a preset duration is maintained, the temperature of the corresponding LED backlight partition can be quickly reduced, the damage to an LED due to excessive temperature is prevented, the service life of the LED is improved, while the uniform brightness of each LED backlight partition is ensured, the temperature of the LED backlight partition is controlled, and the damage to the LED dueto excessive temperature is prevented.

The invention relates to the technical field of lighting technologies of LED lamps, in particular to an LED ceiling lamp, a diffuse reflection coating and a preparation method of the diffuse reflection coating. The LED ceiling lamp comprises a base, a fixing disc inlaid inside the base, chips fixed to the surface of the fixing disc, a lampshade fixed to the bottom of the base 1, and an intelligent controller and a ballast which are mounted between the lampshade and the fixing disc, wherein a plurality of air vents are formed in the outer side of the base 1. The LED ceiling lamp has the advantages that 1, according to the brightness and color temperature-adjustable LED ceiling lamp, through utilizing a controller, a color adjusting unit is controlled to adjust the lighting color of an LED lighting set, and a brightness adjusting unit is controlled to adjust the brightness of the LED lighting set, so that the color temperature of the integral lamp is adjusted, the intelligent control of the ceiling lamp is achieved, and multiple lighting manners of arbitrary color constant lighting, gradual changing lighting, random color alternate changing lighting, and the like, are achieved.

The invention is applicable to the technical field of illumination, and provides an illumination system, an illumination system control method and a storage medium. The illumination system includes aphotosensitive unit, a mobile terminal and lamps. The mobile terminal is used for sending a first lighting instruction to a first lamp when the photosensitive unit senses that the ambient light brightness is less than a preset threshold, wherein the first lamp refers to a lamp which can be wirelessly connected with the mobile terminal in a predetermined area. The first lamp is used for lighting the first lamp to first brightness after receiving the first lighting instruction, and broadcasting a second lighting instruction around. The second lamp is used for lighting the second lamp to second brightness after receiving a second lighting instruction, wherein the second lamp refers to a lamp which can receive a broadcast signal from the first lamp in the predetermined area. The brightness isadjusted according to the lamp layout and the lighting demand, so as to achieve an effect of electricity saving.

The invention discloses a display screen brightness adjusting method and apparatus, and the method comprises the steps of collecting illumination information of light irradiated from outside to a terminal display screen at present, wherein the resolution of the terminal display screen is less than a preset threshold; filtering the illumination information by a preset filtering algorithm; and controlling the brightness of the display screen according to the filtered illumination information. According to the invention, the problem that it is difficult to read information in low resolution display screens like a display screen of an unmanned plane remote controller by naked eyes under strong sunshine in the prior art is solved. The brightness of a display screen in low resolution can be adjusted for adaptability according to illumination intensity, therefore, a user demand can be satisfied.

This invention relates to one LCD aphototropism module set, which comprises at least one light source and one adjust unit, wherein, the light source has at least one light diode and second diode; when first one lights, the second diode lights in first section and senses first diode light intensity in second section to generate one sensor signal; the light adjust unit is connected to first and second diodes to receive sensor signals and to adjust one light diode light intensity.

The invention discloses a control system for regulating the backlight-brightness of the display-panel in television including: a television programmable control center used for outputting the pulse width modulation (PWM) to regulate the backlight-brightness, a demodulation circuit connected with the programmable control center to amplify and convert the PWM and output a gradually changing voltage signal to the backlight of the described display panel for gradually changing its brightness.

A radiation detector is disclosed, for the detection of radiation (8), with a given spectral sensitivity distribution (9), which has a maximum at a given wavelength lambdao, comprising a semiconductor body (1) with an active region (5), provided for detector signal generation and for the incident radiation. In one embodiment, the active region (5) comprises a number of functional layers (4a, 4b, 4c, 4d), with differing band gaps and / or thicknesses and embodied such that said layers (4a, 4b, 4c, 4d) at least partly absorb radiation at a wavelength greater than lambdao. In a further embodiment, a filter layer structure (70) is arranged after the active region, comprising at least one filter layer (7, 7a, 7b, 7c). The filter layer structure determines the short wave side (101) of the detector sensitivity (10), according to the given spectral sensitivity distribution (9), by means of absorption of wavelengths less than lambdao. A radiation detector for the detection of radiation (8), according to the spectral sensitivity distribution (9) of the human eye is also disclosed. The semiconductor body can be monolithically integrated.

The invention provides an adjusting method and system of a terminal camera flash lamp. The method comprises the following steps that 1, the camera sensitivity Shigh is acquired when normal flash lamp photographing is performed; 2, a maximum current Imax needed by a camera when photographing is performed is calculated according to the camera sensitivity Shigh; 3, whether the maximum current Imax is larger than a maximum current Ihard supported by the terminal camera is judged, and the maximum current Ihard is a preset fixed value; 4, if the Imax is larger than the maximum current Ihard supported by the terminal camera, a photographing current is set to be I= Ihard, and the camera sensitivity Shigh is acquired again; if the Imax is smaller than or equal to the maximum current Ihard supported by the terminal camera, the next step is performed; 5, the maximum current Imax and the camera sensitivity Shigh serve as a current and camera sensitivity parameter to be written in the terminal camera, and one-time flash lamp photographing is completed. According to the adjusting method and system of the terminal camera flash lamp, the size of the current of the flash lamp is adjusted when photographing is performed according to the brightness condition of images before and after preflashing to achieve the purpose of controlling the brightness of the flash lamp; accordingly, on the condition that the flash lamp is turned on, the brightness of the images can be in accord to a certain extent, and the electric quantity is saved.

The invention discloses a testing method of an LED module. The method comprises obtaining brightness of a to-be-tested LED module, adjusting a drive current of the to-be-tested LED module when the brightness of the to-be-tested LED module is not within a preset threshold interval, and repeating the above steps until the brightness of the to-be-tested LED module is whithin the preset threshold interval. According to the testing method and a system of the LED module which are provided in the invention, for an LED module brightness of which does not meet a requirement, a drive current of the LED module is adjusted to enable the brightness of the LED module to meet the requirement; and the testing method and system can be performed synchronously with EDID burned-in process in production, also can be used in big-batch operation of modules, can accurately control the brightness of the module, and can save cost.

The invention discloses an intelligent safe energy-saving street lamp convenient to maintain for a park. The intelligent safe energy-saving street lamp comprises a street lamp body, a first lamp pole,a second lamp pole, a rotating shaft, a base, bolts, an electric telescopic rod, a four-bar linkage, a fixing bolt, a lamp holder, a pressure sensor, a controller, a buzzer, a timer, an infrared sensor, an ambient light sensor and a heat dissipation layer, wherein the base is arranged at the bottom end of the street lamp body; the bolts are arranged at the two ends of the base, and the second lamp pole is arranged at the top end of the base; the first lamp pole is arranged at the top end of the second lamp pole; the lamp holder is arranged at the top end of the first lamp pole, and the four-bar linkage is arranged at the bottom end of the first lamp pole; the electric telescopic rod is arranged at the bottom end of the second lamp pole; the pressure sensor is arranged at the bottom end ofthe base; the controller is arranged at the bottom of the second lamp pole; the timer is arranged at the top end of the controller; the buzzer is arranged on the lamp holder; the infrared sensor is arranged at the top end of the timer; and the ambient light sensor is arranged at the top end of the infrared sensor. According to the energy-saving street lamp, people can conveniently replace the energy-saving lamp, and the risk of replacing the energy-saving lamp by workers is reduced.

The invention discloses a brightness control method and system for a street lamp. The method comprises the steps of obtaining the unit time charge quantity of a battery within first preset time of employing to-be-controlled time as a time end and the unit time discharge quantity of the battery within second preset time before the to-be-controlled time; calculating the average charge quantity within the first preset time according to the unit time charge quantity within the first preset time; calculating the average discharge quantity within the second preset time according to the unit time discharge quantity within the second preset time; and controlling the brightness of the street lamp at the to-be-controlled time according to the magnitude relationship between the average charge quantity within the first preset time and the average discharge quantity within the second preset time, wherein the length of the first preset time is equal to that of the second preset time. According to the brightness control method and system for the street lamp, the problems that the battery is aged in an accelerated manner and the street lamp often cannot normally work due to performance degradationof the battery in the using process and continuous sunless weather can be solved.

The invention discloses a method for adjusting a screen of an intelligent terminal, the intelligent terminal and a storage device. The method comprises the following steps: monitoring the time withoutoperation input of the intelligent terminal, when the time without operation input exceeds a first preset value, judging whether the intelligent terminal starts a first application or not, and when the first application is not started, adjusting the screen brightness of the intelligent terminal to a first preset brightness. In this way, the screen brightness of the intelligent terminal can be adjusted more intelligently, power consumption is reduced, and the standby time of the intelligent terminal is prolonged.

The invention relates to an optical mouse light source brightness control apparatus comprising light source, a current switch apparatus and a control apparatus.Light source is to illuminate sampling plane of a mouse and current switch apparatus is set with multiple switches, each of which is coupled to light source, then, when a switch apparatus is conducted, the current passing by light source is changed; besides, the apparatus uses multiple switches conduction state of current control apparatus to control current passing by light source and brightness of light source.

The present invention provides an electronic device. The electronic device includes a power source unit and an electronic unit. The electronic unit includes a first switch, a light-emitting unit, anda plurality of pulse switches. The first switch is coupled to the power source unit, and the first switch has a gate electrode. The light-emitting unit is coupled to the first switch. The plurality ofpulse switches are coupled to the gate electrode of the first switch. Therefore, the brightness of the light-emitting unit may be effectively controlled to improve the quality of the electronic device.

The invention belongs to the field of a mobile terminal and provides a brightness control method for the mobile terminal and the mobile terminal. According to the embodiment of the method and the mobile terminal, current environment light brightness and the distance from user eyes to a display screen of the mobile terminal are obtained; current bright duration of the display screen of the mobile terminal is detected; and the brightness of the display screen of the mobile terminal is controlled according to a preset algorithm, the current environment light brightness, the distance from user eyes to the display screen of the mobile terminal and the current bright duration of the display screen of the mobile terminal. According to the method and the mobile terminal provided by the invention, the brightness of the display screen can be controlled according to the use situation of a user, the method and the mobile terminal are relatively humanized, and the use experience of the user is improved.

The invention provides a pixel driving circuit of a Micro LED display device and a driving method thereof, the pixel driving circuit comprises a first TFT switch, a second TFT switch, a fifth TFT switch, a sixth TFT switch, an eighth TFT switch and a capacitor which are used as driving transistors, and a current row time control signal outputs a triangular wave signal when a current row light emitting unit emits light. According to the pixel driving circuit, Vth compensation can be carried out on the first TFT switch serving as a driving transistor, the light emitting time of a MicroLED can becontinuously adjusted, and the brightness of a panel is adjusted through amplitude modulation and pulse modulation; according to the circuit, the brightness of the panel can be controlled under the condition that a data voltage signal is not adjusted, and MicroLED frequency spectrum offset caused by current density reduction under a low gray scale is avoided.

The invention relates to the technical field of backlight sources, in particular to a backlight source brightness adjusting method, system and device and display equipment, and the method comprises the steps: obtaining a human body sensing signal and the brightness of ambient light, and employing the human body sensing signal and the brightness of the ambient light as dual judgment conditions, and therefore, the brightness of the backlight source not only can be adjusted by generating a dimming instruction according to the brightness of the ambient light, but also can be finely adjusted by generating an adjusting instruction according to the human body sensing signal and the brightness of the ambient light, so that the brightness of the backlight source adapts to different users, the comfort of the users when the users use the display is improved, the brightness of the backlight source can be adjusted according to different actual conditions of light sensitivity of users, so that actual requirements of different users on the brightness of the backlight source are met.

The invention discloses a green energy control system of civil air defense works. The green energy control system comprises a battery module, a brightness detection module, a personnel detection module, a timing module, a microprocessor, an execution module, a key module and a plurality of lamps, wherein the microprocessor is connected with the battery module, the brightness detection module, the personnel detection module, the timing module, the execution module and the key module, and the battery module comprises a solar cell panel, a storage battery, an inverter, a step-down transformer and a photovoltaic controller. Solar energy is converted to electric energy for the microprocessor and the lamps to use by an energy conversion technology of a power module, the energy utilization is improved, and the energy sustainable development is improved; by combining the brightness detection module and the personnel detection module, the brightness in the civil air defense works is controlled; meanwhile, the delayed lighting time of the lamps is counted by the timing modules, and the lamps are prevented from continuing to illuminate after a person leaves to cause energy waste; and the system has the characteristics of electric quantity saving, greenness and environmental friendliness.

The invention discloses a terminal equipment brightness adjusting method and a system thereof, a storage medium and terminal equipment. The adjusting method comprises the following steps: obtaining abrightness control line; obtaining a first point and a second point on the brightness control line; judging whether the first point and the second point are located at the same position or not; when it is judged that the first point and the second point are not located at the same position, the first point and the second point are connected to generate a brightness adjusting line; judging whetherthe brightness adjusting line coincides with any side of a display screen of the terminal equipment or not; and defining a first screen and a second screen for the display screen of the terminal equipment according to the brightness adjusting line when judging that the adjusting line is not overlapped with any side of the display screen of the terminal equipment. According to the method, a user can control the brightness of the display screen of the terminal equipment more conveniently, and the reliability of a terminal equipment product is improved.

The invention discloses an intelligent exhibition hall intelligent adjustment and control central control cloud platform based on the Internet of Things and big data analysis. The system comprises an automobile exhibition hall area division module, an automobile basic parameter collection module, an exhibition area exhibition lamp basic parameter collection module, an exhibition lamp exhibition angle adjustment and control analysis module, an exhibition database, an exhibition lamp irradiation area image collection module, an irradiation area image analysis module and an exhibition area exhibition lamp chromaticity detection module. The method comprises the following steps: performing display area division on an automobile exhibition hall, and obtaining automobile basic parameters and display lamp basic parameters in each display area, so as to obtain a display lamp display angle adjustment terminal, a display lamp brightness adjustment terminal and a display lamp chroma adjustment terminal; therefore, the display angle, brightness and chromaticity of the display lamps in the corresponding display areas are intelligently regulated and controlled in a targeted mode according to the obtained automobile basic parameters and the display lamp basic parameters in the display areas, the display effect of the display environment is improved, and the exhibition comfort of exhibition participants is enhanced.

The invention discloses an LED control circuit. The LED control circuit comprises a rectification unit, a constant-current filtering unit, a control unit and a plurality of LED groups, and the LED groups have different color temperatures; two input ends of the rectification unit are respectively connected to two ends of an alternating current mains supply, and the rectification unit outputs a direct current signal; the constant-current filtering unit is electrically connected with the positive output end of the rectification unit, the output end of the constant-current filtering unit is electrically connected with the plurality of LED groups, and constant-current and constant-voltage electric signals are output to each LED group; the plurality of LED groups are electrically connected withthe control unit; and the control unit controls the conduction or cut-off of each LED group. According to the invention, the alternating-current mains supply is connected with the LED groups with different color temperatures after passing through the rectification unit and the constant-current filtering unit, so that a better constant-current and constant-voltage effect can be realized, and the brightness and the light-emitting stability of the LED are effectively improved; and the brightness of each LED group is effectively controlled through the control chip, so that the dimming and color adjusting functions are realized. The circuit is simple in structure, low in cost and easy to implement.