31 results about "Candela" patented technology

A light-emitting diode (LED) module and an LED packaging method. As the LED module is packaged under the consideration of candela distribution, each of the lead frames of the LED chips packaged in the LED module is bended for tilting the LED chips by different angles to exhibit various lighting effects. Meanwhile, in the LED packaging method, a plurality of LED chips can be loaded on board rapidly and aligned by one operation to result in less deviation in the candela distribution curve.

A retroreflective garment constructed of flame resistant fabric. The garment is light-weight and can be single or double layered. Garments that can be constructed of flame resistant fabric with retroreflective elements applied thereon include garments such as, for example, shirts, pants, coveralls, jumpsuits, jackets, gloves, hats, etc. The flame resistant fabric has a coefficient of retroreflection of about 10 to about 500 candelas per lux per square meter. In addition, the retroreflective elements cover at least about 5 percent of the outer surface of the flame resistant fabric.

Apparatus for optically testing LEDs or other light-emitting components in a wide variety of test environments and to the degree necessary pertinent to the type(s) of faults encountered. In one embodiment, the present invention includes one or more fiber optic probes coupled to a multi-mode sensor unit, incorporating a photo-sensor coupled to a processor which may be programmed to provide a variety of test modes including simple on/off testing, color determination, color matching, wavelength and relative intensity among others. An extremely high sensitivity test mode is also provided for testing LEDs which emit very low intensity light in the micro-candela range in products such as automobile/aircraft cockpit control panel lighted push-buttons for night-time viewing. The multi-mode sensor unit operates over a wide dynamic range and is capable of accurately testing LEDs that may be very dim to very bright without adjustment. In another embodiment, a voltage protection circuit is provided which enables the multi-mode sensor unit to safely operate from a supply voltage in the range of approximately 5 volts DC to approximately 40 volts DC while protecting the multi-mode sensor unit from a potentially damaging overvoltage condition. The voltage protection circuit also protects the multi-mode sensor unit against potential damage caused by reverse polarity voltage spikes, or accidental steady-state reverse polarity voltages.

A selectable candela strobe alarm unit includes an energy storage circuit to reliably discharge a gas filled output device. The circuit includes a primary energy storage capacitor and a secondary energy storage capacitor. The capacitors can be configured in series or in parallel to produce a selected candela output from the gas filled output device.

The invention discloses a method for preparing a high vacuum field modulation organic micromolecule oriented nano-film and a system thereof. The nano-film is applicable to all organic semiconductor devices. The method comprises the steps: an evaporation boat (3) filled with organic micromolecule materials is electrified with direct current, and the evaporation rate of the organic micromolecule materials is controlled within the range of 0.1nm/s-0.3nm/s; a beam of white light with the light intensity of 100-1000 candela is emitted into a vacuum cavity in an incident way, a beam of linearly polarized light having the light vector direction being parallel to evaporation particle flow is obtained through a polaroid sheet (6) arranged in front of a glass window (7), and the orientation of the single organic micromolecule is modulated by the polarized light; the organic micromolecule nano-film which is distributed in an oriented way is formed. The system is provided with the glass window which is sealed with the cavity and has the diameter of 10cm in the middle of one side of a high vacuum evaporation cavity (1); the polaroid sheet having the adjustable direction is fixed closely to the glass window, and a white light source (5) with adjustable light intensity is placed in front of the polaroid sheet.

The present invention belongs to an innovation of flat panel display technology, and relates to a preparation method of blue fluorescence body for plasma screen. On the basis of conventional BaMgAl10O17:Eu+2 the scandium ion and gallium ion (Sc+3+Ga+3) are doped, and its chemical composition formula is Ba1-xEuxMgAl10-y-zScyGa2 O17, where X=0.01-0.2, Y=0.005-0.3 and Z=0.001-0.25. Under the discharge wavelength lambda-147 nm vacuum UV light excitation the light-emitting luminance of said invented fluorescence body is raised by 10-12%, and can be up to 400 candela/sq.m.

The invention relates to a communication device of stroboscopic information. The communication device at least comprises an optical signal transmitting-receiving unit, an optical signal processing unit and an optical communication network; the first optical signal processing unit divides a light emission period into at least two light emission stages of light change according to at least two feature curves, wherein the feature curve of at least one light emission stage changes via a mode of being level off to zero candela; the first optical signal transmitting-receiving unit transmits an optical signal which carries preset information directly or through the optical communication network based on the stagewise curves of the light emission period sent by the optical signal processing unit;and the second optical signal processing unit performs safety verification based on the feature curve of the first light emission stage in the light emission period, which is received by the second optical signal transmitting-receiving unit, and obtains transmission information via a preset information conversion mode based on the feature curve of the second light emission stage when the safety verification passes. Encryption is carried out through optical parameters in multiple dimensions at different stages of the light emission period, and the degree of safety is relatively high.

The flame tube is composed of burning stick, base and outer cover tube. One end of the burning stick is fixed on flat end of the base, and the outer cover tube put outside the burning stick is fitted to the base. Flammable kindling is installed on other end of the burning stick. Friction surface making the flammable kindling on fire is put the position on the outer cover tube for easy to use. Formula of powder is composed of granular ammonium chlorate, potassium chlorate, strontium nitrate and strontium carbonate. Advantages of the invention are that good performances: burning time more than 5 minutes, light intensity 160 candela up, period of validity 4 years; easy of use, high safety and high caution effect; applicable to other special uses besides traffic safety.

The present invention describes a rescue light with a LED light source that meets a minimum requirement of 0.75 candela (cd) of intensity, over a full hemisphere of visibility, with a duration of 8 hours or more. The invention requires only 3 volts of battery power from relatively small batteries, making the invention small and lightweight. In one favorite embodiment the LED is a specially constructed device that uses a blue LED die enclosed with a uniform layer of phosphor on the outer surface of the LED body, which provides an equally bright white light in all directions. Due to the low power requirements of the LED, the device can easily produce white light over an entire hemisphere at the required brightness level for longer than the required amount of time. In another favorite embodiment, a power LED with a large viewing angle is powered with a relatively high current, so as to meet the requirements for intensity over the entire hemisphere, but the high current is applied for only short periods of time in order to meet the requirement for duration. In this second embodiment, a novel switching arrangement is provided to allow the user to turn the LED on and off by changing positions of a movable member of the device, where the original position of the movable member is independent of the operational state of the device. In a third favorite embodiment, multiple LEDs are incorporated for greater visibility, and the operational state of the device is changed by pressing a momentary switch. In all of the described embodiments, a water sensitive switch may be provided to activate the LED on contact with a body of water.

A strobe unit responds to a selected candela output by selecting an optimal capacitor charging frequency to minimize current requirements at the selected candela output. A plurality of charging frequencies can be stored and associated with available input power and selected candela output.

A control and signaling unit or a signaling unit having a light-emitting element, made up of a front element and a mounting adapter for locking the functional elements into place. This is achieved in that only one light-emitting diode having a diode crown and connecting wires are integrated in the functional element, the diode crown being embedded and retained in a receptacle, the light-emitting diode having an angle of radiation of 30-45°. The light-emitting diode has a luminosity of at least 0.5 candela, and an electronic circuit is arranged on circuit conductors, secured to the inner housing wall of a housing half and applied using a foil heat-embossing process.

The invention relates to a side indicating lamp for high-speed trains, which comprises a lamp shade, wherein the inside of the lamp shade is provided with 56 light-emitting diodes, the lighting angle of each light-emitting diode is 15 degrees, and the luminous intensity of each light-emitting diode is 2 candelas; and the total luminous intensity of the light-emitting diodes is 112 candelas. The side indicating lamp provided by the invention is respectively arranged outside the two sides of a carriage; and when the door of the carriage is not closed completely, the side indicating lamp is always on so as to indicate a train driver not to drive, thereby avoiding the occurrence of accidents when the train is started and is in a high acceleration.

The invention relates to an early-warning system based on stroboscopic information. The system comprises a sensing unit, an optical transmit-receive unit and a control unit. The sensing unit comprisesan optical modulation module and sensors. The optical modulation module is used for modulating an electrical signal carrying monitoring information sent by the sensor into an optical signal comprising at least two light-emitting phases in a light-emitting period, wherein at least one monitoring information is set in a manner of modulating luminescence time length, characteristic curve and/ or spectral change rules of light in at least one light-emitting phase, and at least one monitoring information, light intensity/brightness of which is approaching to zero candela change, is set in a mannerof modulating luminescence time length, characteristic curve and/ or spectral change rules of light in at least one light-emitting phase; and when at least one monitoring information in the optical signal received by the at least one optical transmit-receive unit is in an early-warning state, the control unit sends an early-warning instruction to the at least one optical transmit-receive unit andcontrols the at least one optical transmit-receive unit to project a guide light pattern corresponding to the safety level to indicate a safe route.

The invention belongs to the technical field of organic photoelectric materials, and discloses an organic small molecule hole transport material, a preparation method and application thereof. The structural formula of the small molecule hole transport material is shown as a formula (I). The invention also discloses a preparation method of the small molecule hole transport material, and the preparation method is simple and can be used for large-scale production. The small molecule hole transport material is large in steric hindrance, excellent in solubility and good in film forming quality, hole injection and transport are facilitated, and the turn-on voltage of a device is reduced; moreover, the maximum luminous efficiency of an OLED device taking the small molecule material as a hole transport layer can reach 11.0 candela/ampere, and excellent electroluminescent performance is shown.