77results about How to "Brightness control" patented technology

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 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.

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.

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 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.