52 results about "Lighting-up time" patented technology

A liquid crystal display device includes a plurality of pixels each connected to a signal line via a switching element. Each pixel includes first and second sub-pixels having voltage vs. luminance characteristics different from each other with respect to a signal voltage supplied from the signal line. A threshold signal voltage of the first sub-pixel is lower than that of the second sub-pixel. The pixels form color display pixels which are red, green pixel and blue pixels. Where the area ratio of the first sub-pixel in each of the red, green and blue pixels is SR1, SG1 and SB1, and the ratio of the lighting-up time period of the first sub-pixel of each of the red, green and blue pixels in one vertical scanning period is TR1, TG1 and TB1, the relationship of (SR1×TR1)>(SG1×TG1)>(SB1×TB1) holds.

To provide a display panel control device capable of improving gap of moving pictures, etc., without increasing the dividing number of the backlight. The device includes: a black image insertion driving part which performs, on a display panel, black image insertion drive in which video display scanning and black image display scanning are executed in a specific period; and a light-up timing control part which controls a light-up start timing and a light-off start timing of each light source block based on a synchronous signal which synchronizes with the start timing of the video display scanning or the black image display scanning. The light-off period of the light source block is equal to or less than a period from the end of black image display scanning performed on all display lines within a block area to the start of video scanning performed on the first display line within the area.

The invention discloses a control system for a traffic signal lamp. The system includes an image acquisition module, an image processing module, a time distribution module, and a signal lamp control module. The image acquisition module separately obtains road surface images of road sections intersecting at a same intersection; the image processing module detects vehicle characteristics from the images, and separately counts traffic flow data of vehicles travelling in different directions on each of the road sections; the time distribution module comprehensively analyzes the traffic flow data of the vehicles traveling in different directions each of the road sections, and calculates the light-up time of a pass signal lamp and a forbidding signal lamp corresponding to each of the road sections, so that the vehicles on each of the road sections pass through the intersection in the shortest time; and the signal lamp control module separately controls light-on and light-off of the traffic signal lamps corresponding to each of the road sections, according to a calculated calculation result of the light-up time of the traffic signal lamps corresponding to each of the road sections. The control system for the traffic signal lamp achieves optimized distribution of the lighting time of the traffic signal lamps disposed on traffic intersections corresponding to each of the road sections,thus helping to reduce a situation of vehicle backlog on traffic road sections.

An edge exposing apparatus includes a photo detector and a lighting time measuring circuit for detecting a decrease in performance of light source units. The lighting time measuring circuit detects a ready state ((stabilization of luminous intensity) of the light source units, for example by measuring a lighting time for a startup (switch-on) of the light source units. When the measuring circuit detects a preset lighting time, or when the photo detector detects a luminous intensity below a preset value, the light source units are determined to have lowered performance, and are switched off. When a decrease in performance of one unit is detected, a replacement light source unit is started while continuing edge exposure with one or more other light source unit(s). When a ready state is detected, the edge exposure with the one light source unit is terminated (switch-off), and edge exposure is performed with the replacement light source unit.

The invention relates to a high pressure discharge lamp ballast, a lighting device and a lighting system, which can meet an electrode require, adequately heat and form a stable discharge without making the circuit structure complex. The high pressure discharge lamp ballast (1) comprises a full-bridge circuit (11) which converts DC power into AC power, a startup circuit (12) which generates a startup high voltage for breaking down the lamp (DL) insulation, a buck chopper (13) which reduces the output voltage of a DC power supply (E) and outputting to the full-bridge circuit (11), a lamp ballast state detection unit (14) which detects the lamp (DL) ballast state, and a control circuit (15) which controls the full-bridge circuit (11) and the startup circuit (13). The control circuit (15) sets the lamp power supply during the electrode heating period when the lamp is started according to an accumulation ballast time detected by the lamp ballast detection unit (14).

An electronic ballast is provided for quickly restarting a high-pressure discharge lamp after shutdown. The ballast includes a power supply circuit for supplying power to the lamp from a commercial power source, a start voltage generation circuit for supplying a starting high voltage to the lamp and a control circuit for controlling the power supply circuit and the start voltage generation circuit. A lighting transition module detects a startup or shutdown of the lamp. A lighting time count module measures a lighting time of the lamp when startup is detected. A comparison module compares the lighting time and a first reference time when shutdown is detected. A delay time setting module sets a predetermined delay time of the start voltage generation circuit based on the comparison result. Operation of the ballast is halted from a startup trigger until lapse of the delay time, and then the high starting voltage is supplied to the lamp.

The embodiment of the invention discloses a brightness compensation method and device of a display panel and the display device. The brightness compensation method of the display panel comprises the steps of obtaining brightness values at multiple different moments; determining brightness attenuation fitting parameters according to the brightness values at the different moments and a brightness attenuation formula; resetting the initial brightness value, and determining an optimal brightness attenuation fitting curve according to the set initial brightness value and the brightness attenuationfitting parameter; and performing brightness compensation according to the optimal brightness attenuation fitting curve and the display panel lighting time. According to the technical scheme providedby the embodiment of the invention, the brightness attenuation of the display panel can be compensated accurately in real time.

The invention provides an induction lamp control method and device and relates to the field of traffic control. The inductive lamp control method and device comprise that a plurality of object detectors detect vehicles or / and pedestrians moving on a road and generate a detection signal when the vehicles or / and pedestrians are detected; a controller receives first position information sent by an analysis device and the detection signal, switches on one or more induction lamps associated with the first position information after the detection signal is received, and switches off the one or moreinduction lamps associated with the first position information after a preset lighting time. Thus, the induction lamp are switched on along with the trajectories of the vehicles or / and pedestrians, and are switched off within preset lighting time after the vehicles or / and the pedestrians leave. Therefore, the induction lamp control method and device realize a cost-effective lighting facility and alighting control method, control the cost while providing lighting for vehicles and pedestrians, and are flexible to control.

A control method of traffic road cones includes 1, arranging N (N > / = 2) traffic road cones as one group of traffic guide devices; 2, determining the lighting time of the traffic road cones in each group of traffic guide devices to be t, sparkling intervals to be T, and sparkling periods of each group of traffic guide devices to be N*(t+T), and allowing a first device to be lighted once more via T after a last device extinguishes; 3, powering on the N traffic road cones according to the intervals t+T sequentially, and allowing the lighting time of each traffic road cone to be t and the intervals between extinguishing and lighting of two adjacent devices to be T; in the group of traffic guide devices, allowing the traffic road cones to sparkle sequentially to form orientated sparkling patterns to perform traffic guide indication. According to the control method of the traffic road cones, a plurality of devices in a same classification are utilized simultaneously in a combined manner to form lighting combinations with certain sparkling rules and recognizing significances, accordingly special traffic information is released, and the method is used for assisting traffic management.

A power-saving lighting apparatus is provided, and includes at least one light source, at least one driver, a controller and a memory. The driver is coupled with the light source. The controller is coupled with the driver. The memory with a time table is coupled with the controller. The time table records lighting-up time periods and their corresponding brightness data of the light source. The controller controls the light source according to the lighting-up time periods and their corresponding brightness data.

There is provided a vehicular lamp that can prevent excess current from flowing between an anode and a cathode at the lighting-up start to prevent a damage and life shortening of a cold cathode fluorescent lamp at low cost. The vehicular lamp includes: a cold cathode fluorescent lamp having a cathode, a gate, and an anode; and a lighting controlling unit operable to pre-discharge electricity from the cathode to the gate prior to lighting of the cold cathode fluorescent lamp, in which the lighting controlling unit applies a voltage between the cathode and the anode after once lowering a voltage between the cathode and the gate and then again applies an extraction voltage between the cathode and the gate in order to begin to discharge electricity from the cathode to the anode. The lighting controlling unit may pre-discharge electricity from the cathode to the gate until the temperature of the cathode is substantially equal to that of lighting-up time.

A light source apparatus includes a first light source, a second light source configured to emit light with a different wavelength than that of the first light source; and a controller for controlling each of the first and second light sources. The controller provides a control such that the second light source takes a longer time from a lighting start to a lighting completion than the first light source, and the second light source starts lighting earlier than the first light source.

An information processing device includes a storage unit configured to store area information for designating an area in which a lighting device is to be illuminated and illuminating time period information for designating a time period in which the lighting device is to be illuminated; and a first processor configured to acquire a current position of each of a plurality of vehicles, to extract at least one vehicle of which the current position is in the area from among the plurality of vehicles, and to instruct the at least one extracted vehicle to illuminate the lighting device in the time period.

The embodiment of the invention discloses a signal adaptive supplementary light device. It includes: a signal detection device, the signal detection device is used to receive the signal output by the camera, and convert it into a corresponding control signal; a signal judgment device, the signal judgment device is used to detect the signal frequency and trigger time of the control signal The correlation relationship, and when the signal frequency is too low, automatically perform frequency multiplication processing on the control signal; the output device, the output device is used to form a corresponding output according to the adjustment control signal output by the signal judging device signal; a power conversion device, the power conversion device is used to synchronously control the output brightness and lighting time of the supplementary light device according to the output signal.

The present disclosure relates to a method and device for controlling a street lamp, a street lamp and a readable storage medium. The method is applied to a street lamp. First, the street lamp acquires the lights of vehicles passing under the street lamp from the first preset moment, and then , determine the appropriate lighting time of the street lamp according to the vehicle opening condition, and finally, control the street lamp to be lit according to the appropriate lighting time, therefore, the lighting time of the street lamp is no longer fixed, but according to the actual It is determined by the turning on of the lights of the vehicle under the street lamp, which improves the flexibility of the lighting time of the street lamp. At the same time, the street lamp will only be lit when the driver of the vehicle needs the auxiliary lighting of the street lamp. Therefore, the street lamp is improved. In addition, when the driver of the vehicle does not need the auxiliary lighting of the street lamp, the street lamp is turned off, thereby avoiding the waste of electric energy by the street lamp and prolonging the service life of the street lamp.

The invention relates to a driving circuit, and the circuit comprises a path matching module which is used for eliminating an unknown phase difference between a PWM broadened clock signal and a PWM generated clock signal; the PWM module is used for generating a PWM signal based on display data, the PWM generation clock signal and the PWM broadening clock signal; and the channel current output module is used for outputting constant current during the effective period of the PWM signal. On one hand, the circuit can compensate the lighting time of the LED; and on the other hand, through a path matching mode, relatively accurate PWM phase compensation can be finally realized.