253 results about "Light flashes" patented technology

A method of producing a diode drive current in an oximeter includes sensing at least a part of a current passing through the diode and converting the sensed current to a sensed voltage, inputting the sensed voltage to a feedback amplifier for stabilizing the current passing through the diode, and eliminating an offset voltage across inputs of the feedback amplifier. A pulse oximeter includes a diode for emitting light flashes, a feedback amplifier having inputs, a feedback capacitor, and an output, the feedback amplifier stabilizing a current passing through the diode, a nulling amplifier having inputs, a nulling capacitor, and an output, the nulling amplifier charging and discharging the feedback capacitor until the inputs of the feedback amplifier are at a same voltage. The operation may include synchronizing an elimination of input offset voltages of the feedback and nulling amplifiers with on or off state of diode current.

The invention is based on a method for controlling a flashlight in connection with a digital image sensor without a mechanical shutter, wherein the exposure of the image sensor is performed in sub-areas, such as pixel rows or columns, or in another order, by using a rolling electronic shutter or the like. Thus, the exposure of said sub-areas of the image sensor takes place at least partly at different times. According to the invention, during the time of exposure of one image, i.e. substantially all the sub-areas of the image sensor, several discrete, successive flashes of the flashlight are used to achieve even exposure of the image area, which the flashes are timed in such a way that each single flash is triggered at a point of time which is common to the integration or exposure time of as many successive sub-areas of the image sensor as possible. According to the invention, the successive light flashes are also timed in such a way that one and only one flash of the flashlight occurs during the integration or exposure time of each single sub-area. By the present invention, the significant advantage is attained that the invention minimizes the number of light flashes required for one image while it also secures that each sub-area of the sensor to be exposed at a different time is illuminated as evenly as possible.

A visual caller identification system and method are provided. A caller identification device of a called party's telephone, whether integrated with the telephone or stand-alone, includes a series of colored lights for visually alerting the called party to an incoming call. The called party may program the caller identification device so that a first colored light flashes any time the caller ID identifies information known to the called party. A second light flashes any time caller identification information is provided, but where the information is unknown to the called party. And, a third colored light flashes any time the caller identification is not provided (e.g., private, unlisted, etc.). When the telephone begins to ring, the called party may look at the telephone for a quick screening without having to go to the telephone to read the caller ID. If the first light flashes, the called party knows that the incoming call is from a known party. If the second light flashes, the called party knows that the calling party will be identified if the called party goes to the telephone to read the caller ID. And, if the third light flashes, the called party knows that no caller identification information is available for the incoming call. Alternatively, caller identification information to be displayed on the called party's caller ID device may be projected onto a projection surface, such as a wall in the called party's home or office.

A design and readout of a xenon detection medium based device, which provides improved spectroscopic performance compared to currently commercially available devices. To achieve energy resolution improvement, a method to accurately measure radial spatial position for interacting events within a HPXe cylindrical detector is described using the plan as shown in FIG. 4. This is accomplished by utilization of light generated both at the gamma interaction site and at the collection point near the anode wire of the cylindrical detector. These light flashes are detected by a VUV photon detector. Light transmission is facilitated by incorporating a vacuum ultraviolet (VUV) light transparent window at least one end of the cylindrical ionization detector. With the known electron drift velocity in HPXe, the time between these two photopulses is sufficient to accurately determine the radial coordinate. Consequently, correction by electronic means for the electrostatic pulse dispersion using the expression graphed in FIG. 2 can be achieved in order to approach the true intrinsic energy resolution limit for HPXe.

Methods and apparatus are provided for protecting an unattended parked vehicle from being impacted by a moving vehicle under control of a driver. The apparatus comprises a detection and alarm system built into the unattended parked vehicle. When a moving vehicle comes within a predetermined distance from the unattended parked vehicle, the apparatus senses the presence of the moving vehicle and activates the alarm system. If the moving vehicle continues to approach the unattended parked vehicle, the activated alarm signals are increased in intensity. Typically, the alarm signals would be in the form of lights flashing and/or horn blowing, or any appropriate combination of audible and visual signals.

A portable device is equipped with a signaling circuit that responds to a searching signal (e.g., hand clap, light flash, RF signal, infrared light) generated to locate the portable device when it is misplaced or lost. The device generates a location signal to enable the user to find the device. The location signal may be an audible, light, vibration, or other signal that calls attention to the device to enable the user to find it. The device may also sense events which cause it to disable the sensor, render it less sensitive, or suppress the generation of the location signal. The sensed event is any event, e.g., heat, motion, which indicates that the device is not, in fact, lost.

Apparatus, methods, system and devices for monitoring road surface temperature to detect hazardous road surface conditions. An indicator provides the sensed road surface temperature and hazardous road condition warning to a driver while a tail light interface automatically produce a tail light signal to warn drivers traveling behind the vehicle when a hazardous condition is detected. In an embodiment, the system includes a vehicle engine retardation system interfaced with the hazardous road condition warning system. When the retardation system is in use and hazardous road surface conditions are detected the controller automatically produces the brake light signal unless a tail light control switch is used to manually deactivating the automatic tail light flashing signal when the vehicle is traveling in a state that does not allow alternative control of the brake lights.

An object of the present invention is to provide a drive recorder and a drive recorder system that can check the content of the image captured by an image capturing unit that outputs a video signal at a frequency not affected by LED traffic light flashing. More specifically, the invention provides a drive recorder includes an image converting unit for converting a received video signal into image information, and for outputting the image information in the form of a video signal, a storage unit for storing the converted image information, and a control unit for performing control so that the video signal is converted into the image information by using a first frequency not affected by LED traffic light flashing, and so that the image information stored in the storage unit is output in the form of a video signal by using a second frequency corresponding to a standard video signal; the invention also provides a drive recorder system comprising such a drive recorder.

A toothbrush with a handle having a base and a head and defining a cavity positioned between the base and the head. The toothbrush also includes a plurality of bristles attached to the head of the handle, a green light configured to flash for a first period of time, a yellow light configured to flash for a second period of time, and a red light configured to flash for a third period of time. The toothbrush also includes a switch coupled to the handle for activating the green light, and a circuit for automatically activating the yellow light after expiration of the first period of time and for automatically activating the red light after expiration of the second period of time.

The invention discloses a flue gas flow velocity measuring device and method. The flue gas flow velocity measuring device comprises two groups of light emitting systems and light receiving systems which are respectively arranged at two sides of a flue, wherein each light emitting system comprises an LED light source and a collimating lens located on an exiting light path of the LED light source; each light receiving system comprises a focusing lens and a photoelectric detector located on a transmittance light path of the focusing lens; light beams emitted by the LED light source are collimated to parallel light beams through the collimating lens and then to pass through the flue, then the parallel light beams are received by the focusing lens and sent to the photoelectric detector; and a digital display is connected outside the photoelectric detector through a data processing system. In the invention, a high frequency flash signal caused by temperature fluctuation can be measured, anda low frequency flash signal caused by smoke dust concentration fluctuation can also be processed at the same time; a light flash signal can be obtained under the condition that the turbulent flow ofa flue refractive index is very weak (light velocity and flow meters can not be adopted); and the flue gas flow velocity measuring device has the characteristics of high measurement precision, non-interference, convenience for installation, broader application range and the like.

An illumination system has a housing that rotates with a vehicle wheel, and the housing has a cavity with lighting and controls within the cavity. Light from the cavity is directed onto a vehicle wheel, and the light flashes in relationship to the rotation speed of the wheel which makes the wheel appear to be stationary or slowly rotate in a backward or forward direction.

In a method and system to provide high intensity photic stimulation to disable target subjects, a high intensity light source is activated by trigger signals to produce light flashes in commanded patterns of duration and frequency. A user views a field illuminated through a shutter viewer such as shutter goggles. The goggles are gated to a light blocking state in response to trigger pulses. The light blocking state has a wider time width than the light flashes from the light source produced in response to the trigger pulses to avoid the need for close synchronization. The target subjects are exposed to the high intensity light flashes while the light flashes are blocked from the view of users. Due to a low duty cycle, the users' view through the shutter goggles is unaffected by the intermittent opacity of the shutter goggles.

A mesh lighting system for emergency vehicles and method for retrofitting a vehicle with emergency lights is disclosed. The system comprises a plurality of independent signalling light sources each supplied by a dedicated source of energy, a control module, and a low powered wireless network connecting said control module with the plurality of light sources. The plurality of independent signalling light sources emit at least one light flash in response to a control signal received from the control module.

An automated animal deterrent apparatus for mounting to a culvert, the apparatus includes attached weatherproof housings to protect its other components; a passive infrared sensor to detect pest animals within a detection zone; a siren to produce noise; a scent releasing assembly to emit an odor; a strobe light to produce light flashes; a solar panel and battery to power the apparatus; and a tube and clamp assembly for attaching the apparatus to the end of a culvert.

The invention in this application relates to a toner composition for electrostatic latent image development which is characterized in that, in a toner composition comprising at least binder resin, colorant and charge control agent, to be used in a print forming method provided with a print fixing device which fixes the toner image on a recording medium by means of a light flash, the concentration of benzene generated by heating for 90 seconds at 330° C. is no more than 60 mug/g, and the invention provides a toner composition for electrostatic latent image development which either extends the filter life or does not require the use of a filter.

The invention discloses a warning device for road traffic. The warning device for road traffic comprises a strip-shaped groove arranged at two sides of a road surface turning and a stand rod fixed onthe roadside, a strip-shaped shell with an opening in the upper end is arranged in the strip-shaped groove, a movable plate is hermetically and slidably connected in the strip-shaped shell, the lowerend of the movable plate is elastically connected in the inner bottom of the strip-shaped groove through a spring, the upper end of the movable plate is fixedly connected with a deceleration band through supporting rods, the upper end of the stand rod is provided with a sliding groove in a through mode, a sliding plug is hermetically and slidably connected in the sliding groove, and the upper endof the sliding plug is fixedly connected with a vertical rod. According to the warning device for road traffic, the principle that magnets cut a magnetic induction line is utilized to generate induction current, so that warning lights on the side wall of a warning plate emits light, meanwhile, the magnets arranged at the same distance enable the generated current to be constantly changed, then thesituation that the warning lights flash is caused, the warning effect is achieved on a driver, the driver is reminded that a vehicle comes at the turning, and the preparation for meeting the vehicleis made in advance.

The method includes following steps: designing pulse switching circuit connected to sensor in electric quantity or non electric quantity for controlling light emitting device to send out pulses of optical flare; defining fixed cycle T of each flare, and bright and extinguished durations in cycle are half to half; N times of continuous flare express coded number N, and extinguished state between two numbers as interval To; N is outputting coded digital information; setting up correspondence list between coded number and information in advance etc. light emitting devices in multiple colors can be utilized to distinguish digit positions of coded numbers. For example, N1, N2, and N3 times of continuous flare in different colors means that the coded digit number N is N3X100+N2X10+N1. Transfer time t between different colors is a blank interval. Number is coded in decimal system or in M scale. Features are: simple, and high reliability.