53results about How to "Change color temperature" patented technology

The invention discloses an LED lamp with adjustable color temperature and a color temperature adjusting method thereof. The LED lamp comprises an LED lamp group and a color temperature adjusting device; the color temperature adjusting device comprises a DMX512 control stand and a circuit board; the LED group comprises LED lamp bodies with different colors or color temperatures; a CPU is arranged on the circuit board and the CPU is respectively connected with a control panel, a display module, a memory, the DMX512 control stand and the LED lamp group; the control panel is provided with an assignment button for assigning the CPU. The read / write mode of the memory is changed to cause the CPU to carry out read / write operation on the memory, the brightness level figure is input by the evaluation button on the control board to drive the LED lamp bodies in the LED lamp group to illuminate and the brightness level figure is considered as a default value or modified value, thus the overall color temperature of the LED lamp group is changed.

The invention discloses a white light LED lamp and a method for generating white light with high color rendering. The white light LED includes a substrate with high thermal conductivity and an LED chipset arranged on the substrate with high thermal conductivity. The LED chipset includes at least two blue chips and at least one red chip , the blue light chip and the red light chip are connected with a control circuit that can adjust the size of the current output; it also includes a fluorescent lens arranged above the LED chipset, and yellow fluorescent powder and green fluorescent powder are evenly distributed in the fluorescent lens. The white light LED lamp of the present invention uses at least two blue light chips and at least one red light chip, combined with yellow phosphor and green phosphor, to form four continuous peak wavelengths to generate a white light with high color rendering, high light efficiency and adjustable color temperature LED.

The invention provides a laser light source module group comprising a laser diode, a light filter, a first focusing lens group, a second focusing lens group, a fluorescent layer and an LED. A first light beam emitted out of the laser diode is firstly reflected by the light filter and then converged and incident to the fluorescent layer through the first focusing lens group; the fluorescent layer absorbs the first light beam and emits a second light beam having different wavelength from that of the first light beam; and the LED is arranged at the other side of the light filter relative to the incident first light beam, and light emergent out of the LED is converged through the second focusing lens group and then reflected by the light filter so as to form a third light beam, wherein driving current the laser diode and the LED can be respectively controlled. The proportion of two types of light in the final output light can be controlled through circuit control so as to adjust color temperature of the output light.

The invention provides a preparation method for a fluorescent and transparent polycarbonate grating for an LED (light-emitting diode). The materials of the fluorescent and transparent polycarbonate grating for an LED are composed of polycarbonate, fluorescent powder, an antioxidant, a coupling agent and a light dispersing agent. The fluorescent and transparent polycarbonate grating for an LED is formed by performing the preparation processes of sieving, preparing, mixing, drying, matching with auxiliaries, mixing, banburying, forming, annealing, cutting, etching and the like on the composition materials. The fluorescent and transparent polycarbonate grating can be used for an LED lamp bead / lamp, for adjusting the colour temperature of the LED, and solving the problems of the glare of the LED, the non-uniform distribution of the traditional silica gel fluorescent powder, and the like. The problem of non-uniform coating of the fluorescent powder is effectively solved, so that the light-emitting efficiency, the service life and the light spectrum stability of the white-light LED are improved; and moreover, the fluorescent and transparent polycarbonate grating is relatively simple in structure and preparation process, high in reliability, low in cost, good in plasticity and capable of being widely applied to LED manufacturing, as well as opens up unprecedented flexibility and creativity for the field of light sources.

The invention provides backlight and a control method and a display device thereof, and the backlight comprises at least two luminous sources of which the color temperatures are different; a control module used for controlling drive current of a luminous source of each color temperature so as to adjust the color temperature of the backlight. According to the backlight disclosed by the invention, adjustable color temperature of the backlight can be realized by arranging the at least two luminous sources of which the color temperatures are different, and by respectively controlling the drive current of the luminous source of each color temperature through the control module, when the backlight is applied to a liquid crystal display, the color temperature of the liquid crystal display can be changed under the situation that the transmittance of a liquid crystal display panel is not changed, and the influence on the image quality can be avoided.

The invention provides a control system of an aquarium illuminating system, wherein a motor driver changes the relative inclination degrees of light sources related to ornaments in an aquarium with the passage of time, so that incident light falling onto the ornaments more accurately simulates natural light of the sun which moves every day and moves seasonally. Besides relative change of the inclination degrees, the power setting of the light sources can be further adjusted so as to further simulate the effect caused by changes of climates and / or weather every day. Therefore, the system eliminates regions filled with excessive light (the light further can promote growth of unnecessary algae) from the light sources erected in a single fixed position in the aquarium, and saturation of the excessive light means that light from the light sources in the single fixed position penetrates downward into the deep part of the aquarium. By providing the system which effectively changes the angle of incidence of light, a programmable illuminating level can be obtained in the outward regions of ornaments or the regions below bumps, which can not be realized by the erected light sources in the single fixed position.

The invention relates to an LED (Light Emitting Diode) lamp and specifically discloses an intelligent light source with adjustable color temperature. The intelligent light source comprises an LED light source which comprises a red LED, a green LED and a blue LED, wherein variable-current power supply devices, of which the magnitude of the output current can be randomly adjusted, are respectively connected with the power ends of the red LED, the green LED and the blue LED. When the intelligent light source with adjustable color temperature is used, the purpose of randomly adjusting the color temperature is achieved by adjusting the output current of the variable-current power supply devices of the monochrome LEDs, and no additional LED light source is required for adjusting the color temperature, so that the intelligent light source is more flexible in mode for adjusting the color temperature and is lower in cost.

The invention discloses a composite optical material for expanding color gamut, a preparation method and application thereof. The composite optical material of the present invention includes a transparent matrix and a light wavelength conversion material discretely distributed in the transparent matrix. Preferably, a number of scattering particles are also discretely arranged in the composite optical material. The composite optical material of the present invention is capable of absorbing light within a predetermined wavelength range and at least partially converting the absorbed light into light within another wavelength range. When the composite optical material of the present invention is used in a color display, the color gamut can be extended to 120% or more of that before use, and at the same time, the brightness of the light source is hardly affected, thereby maintaining a high light efficiency.

The invention relates to a projection light source, a projection optical system and projection display equipment, in particular to a projection optical engine. The light source is a single RGB multi-chip LED; the front end of the single RGB multi-chip LED is provided with a collecting and color combining plastic lens; the front end of the collecting and color combining plastic lens is provided with a fly-eye lens array which subdivides discrete light beams out of an emergent part into tens of to hundreds of small light beams; a collimation lens is arranged between the front end of the fly-eye lens array and an LCOS screen not provided with a CF film, and changes the optical axis of each small light beam to the center of the LCOS screen so as to superpose each small light beam onto the LCOS screen; and the spectrum of the white light beams lighting the LCOS screen are correspondingly fitted with the LCOS screen reflection spectrum. The projection optical engine has the basic advantages of long service life, short response time, easy drive, no radiation heat, high lighting effect of the light source, energy conservation and environmental protection of the LED projection light source, and also has the advantages of improving light output, brightness uniformity, chroma uniformity and color reproduction rate, and changing color temperature.

The present invention relates to a color-temperature-adjustable LED driving circuit. Firstly, oscillation triangle waves are generated through an oscillation module, and the duty cycle of outputted PWM signals is adjusted by a PWM control module according to the oscillation triangle waves. After a first driving module and an inverse comparison module receive the PWM signals, the signals are subjected to reverse treatment by the inverse comparison module. After that, the processed PWM signals are outputted to a second driving module. That is to say, the first driving module and the second driving module realize the complementary duty ratio of the PWM signals. Therefore, the light-emitting brightness of a first LED lamp set and the light-emitting brightness of a second LED lamp set, respectively controlled by the first driving module and the second driving module, are complementary in strength. As a result, the light-emitting brightness of the first LED lamp set and the light-emitting brightness of the second LED lamp set are adjusted through changing the duty ratio of the inputted PWM signals. Furthermore, the color temperature of the first LED lamp set and the color temperature of the second LED lamp set are changed.

The invention discloses an LED (light emitting diode) light source device comprising a light emitting part, a fluorescence piece, a driving part and a PWM (Pulse-Width Modulation) adjusting device, wherein the light emitting part comprises a substrate and a plurality of LEDs arranged on the substrate, the fluorescence piece shields a light emission path of the LEDs and comprises a plurality of regions with different content of fluorescent powder, the driving part drives the fluorescence piece and the substrate to oppositely rotate, and the PWM adjusting device adjusts and changes the illumination time of the LEDs to control the irradiated excitation time of the fluorescent powder in each region so as to change color temperatures.

The invention discloses an area source device, comprising a light guide plate and a number of point light sources, wherein the light guide plate includes an incoming light surface which is on the side of the light guide plate; a number of point light sources are installed adjacent to the incoming light surface of the light guide plate; a light filter is arranged between the point light sources and the incoming light surface. Because the light filter is arranged between the point light sources and the incoming light surface, the light filter can extract the useful light spectrum, change the colour temperature and increase the colour developing effect; because the filter is arranged on the incoming light surface of the light guide plate side, the material consumption and the cost of the light filter can be reduced, and the light performance of the area source device can be improved with low cost.

Disclosed herein is a light source apparatus for photo-diagnosis and phototherapy. The light source apparatus includes a first light source, a second light source, a light-guide, an interference filter, and a compensation filter. The first light source is non-coherent, and the second light source is coherent. The light-guide delivers light emitted from the first light source and the second light source. The interference filter is disposed on an optical path of the first light source. The compensation filter is disposed between the first light source and the light-guide, and compensates for an output spectrum of the first light source and converts the output spectrum of the first light source into a predetermined reference output spectrum. Here, the light emitted from the second light source is reflected by the interference filter to be incident to the light-guide and the light from the first light source passes through the interference filter at the same time.

The invention discloses a photographic device which comprises a shell body, a camera shooting module, a flashing module and a shielding module. The shell body is provided with a containing space, and a window is formed in one outer surface of the shell body. The camera shooting module is arranged in the containing space. The flashing module corresponding to the window is arranged in the containing space. The shielding module corresponding to the window is arranged on one side of the shell body in a sliding mode, and when the shielding module carries out displacement to shield the window, the strength or the color temperature of light projected by the flashing module is changed into different strengths or different color temperatures.

The invention provides a manufacturing method of an LED (Light Emitting Diode) ceramic substrate-based lamp. The manufacturing method comprises the following steps of: forming a pressing molding mold; performing dry-pressing molding on powder by using NPO (Negative-Positive-Zero) ceramic powder; forming a formed ceramic body by using a press; placing the formed ceramic body in a vertical sintering furnace for sintering; grinding the sintered ceramic body by using a grinding machine to form a flat plate-shaped ceramic substrate; designing a circuit wiring diagram; performing silk-screen printing of silver paste on the ceramic substrate by using a silver silk screen printer; laying a silver foil at the position of a welding point as a bonding pad; roasting the ceramic substrate which is subjected to the silk-screen printing of the silver paste by using a tunnel furnace. According to the manufacturing method, the ceramic is used as a substrate raw material; the lamp has the advantages of excellent heat conduction, insulation, erosion resistance and surface characteristic performance; by using a power scheme of ACLED (Alternating Current Light Emitting Diode), the failure rate is low, and the stability of the lamp is improved; and a nanometer machining process is used for performing surface treatment on a reflecting cover, and a nanometer material is used as a raw material for the reflecting cover, so that the lamp has superior light reflection and thermal reflection effects and a function of changing color temperature of a light source.

The invention relates to a lamp with a high lighting effect at a low color temperature. The lamp comprises a lens light source cavity (1). An LED light source (2) is arranged in the lens light source cavity (1). Yellow fluorescent powder silica gel (3) containing the LED light source (2) is arranged in the lens light source cavity (1). The purpose of controlling the color temperature is achieved by adding different proportions of fluorescent powder into the silica gel, in this way, the color temperature of the lamp is changed without affecting the lighting effect of the whole LED lamp, the problem that an LED light source has a poor lighting effect at the low color temperature is solved, and the purpose of emission reduction is achieved.

The invention discloses a fish gathering LED lamp with graphite cooling systems. The fish gathering LED lamp with the graphite cooling systems comprises an installation base, wherein a main light source is horizontally arranged in the middle of the installation base, supplemental light sources are obliquely installed on the two sides of the main light source, the graphite cooling systems are arranged between the main light source and the supplemental light sources as well as between the main light source and the installation base, the main light source and the supplemental light sources are respectively provided with a plurality of LED light source units installed in an array mode and connected in parallel, each LED light source unit is provided with a plurality of LED lamp beads, each LED lamp bead is provided with an LED chip encapsulated in a flip and eutectic bonding mode, and the LED light source units are electrically connected with a driving power supply; each graphite cooling system is provided with a plurality of graphite plate units, the quantity and positions of the graphite plate units are the same as those of the LED light source units, reinforcing and cooling pieces are evenly arranged on one lateral side of each graphite plate unit, and the LED light source units are fixed on the other lateral side of each graphite plate unit. The fish gathering LED lamp with the graphite cooling systems is good in cooling efficiency, capable of greatly reducing the weight of the whole lamp and strengthening salt mist resistance, long in service life, saving in fuel oil, wide in application range, and flexible in use.

The present invention discloses a multi-stage color temperature regulation and control device, comprising an LED (Light Emitting Diode) structure and a casing structure; wherein, the LED structure comprises a tube body, a plurality of semiconductor light-emitting elements which are arranged in the tube body and produce light with a photoelectric effect, and two electrode elements which are arranged at two ends of the tube body and used for transmitting electric energy to the semiconductor light-emitting elements; the casing structure comprises a casing which is sleeved outside the tube body and rotates relative to the tube body, and a plurality of color temperature films which are adhered to the casing and can be re-excited to generate lights with different color temperatures when being irradiated by the lights emitted by the semiconductor light-emitting elements; when the casing is rotated relative to the tube body, the lights emitted by the semiconductor light-emitting elements irradiate the predetermined color temperature films, so that the lights with the predetermined color temperatures can be generated. By adopting the multi-stage color temperature regulation and control device of the present invention, a user only needs to rotate the casing, then the lights with the different color temperatures can be emitted by the same semiconductor light-emitting elements, thereby saving time for changing tubes at present and saving cost for manufacturing the light-emitting elements used for emitting the lights with the different color temperatures.

The invention discloses a profile structure of an elevator car ceiling lamp and an elevator car ceiling lamp. The profile structure of the elevator car ceiling lamp mainly comprises a front border andthe like. The front border, a rear border, a left border and a right border are connected to form a rectangular frame. A middle cross beam is connected between the left border and the right border, and a middle vertical beam is connected between the front border and the rear border. The front border, the rear border, the left border and the right border are made from profiles A. Reinforcing holesare formed in the profiles A. Lamp fixing clamps are arranged above the reinforcing holes. Lamp installation faces are arranged on the outer sides of the lower portions of the reinforcing holes. A plurality of punching positioning grooves are formed in the two side and the upper side of each profile A. An assembling positioning groove is formed in the inner side of the bottom of each profile A. The middle cross beam and the middle vertical beam are made from profiles B. Lamp fixing clamps are arranged on the two sides of the upper end of each profile B, and an installation rod through grooveis connected to the lower portion of each profile B. The upper surfaces of the two sides of each installation rod through groove are lamp installation faces. Punching positioning grooves are formed inthe top ends of the profiles B. According to the profile structure of the elevator car ceiling lamp and the elevator car ceiling lamp, the profile structure is formed by assembling aluminum profiles,the ceiling height is decreased to 60 mm, an area source is adopted, and thus, light is evenly emitted from the ceiling; the dimming technique is adopted so that the strength, color temperature and hue of the elevator car ceiling lamp can be changed; and the lateral light-emitting technique is adopted, so that dark areas are reduced.

In an LED driving circuit with an adjustable color temperature, through a voltage adjusting module, an input voltage size is adjusted; and a voltage-dividing filtering module is used to carry out voltage-dividing filtering processing on an input voltage and then outputs to a PWM control module. A duty ratio of a PWM signal output by the PWM control module is decided by the input voltage size. The PWM control module outputs two paths of complementary PWM signals. And the signals are amplified by a first amplification module and a second amplification module and then are correspondingly output to a first switch module and a second switch module. The duty ratios of the PWM signals received by the first switch module and the second switch module are complementary. Luminescence brightnesses of a first LED lamp group and a second LED lamp group controlled by the first switch module and the second switch module are complementary. Through changing the input voltage size, the luminescence brightnesses of the first LED lamp group and the second LED lamp group can be adjusted and then the color temperatures of the first LED lamp group and the second LED lamp group are changed.

The invention belongs to the field of automobile lamp illumination and relates to a headlamp module. The headlamp module can have a high beam function and a low beam function at the same time, can generate various high beams with different brightness and anti-dazzling light types through the adjustable transmissivity of a light shielding plate, can be suitable for different driving conditions by adjusting the color of the light shielding plate and changing the color temperature of emergent light. The headlamp module comprises a shading plate (1), a projection lens (2), a light source (3), a reflector (4) and a radiator (5); the light source (3) is installed on the radiator (5); the reflector (4) is installed above the radiator (5); the projection lens (2) is installed on the radiator (5) through a support (8); and the shading plate (1) is installed on the support (8) and located at the front focus of the projection lens (2).

A color-adjustable quantum dot LED based on electromagnetic regulation and control is characterized by being composed of a control circuit (1), an iron rod (2), clamping components (3), transparent glass (4), a magnet (5), a blue-ray LED body (6), a flexible water storage bag (7), a guide pipe (8), an extending-and-contracting shell (9) and quantum dot suspended liquid (10); the transparent glass (4) serving as the top of the extending-and-contracting shell (9) and the transparent glass (4) serving as the bottom of the extending-and-contracting shell (9) are encapsulated to form a container, and a proper amount of quantum dot suspended liquid (10) is injected into the container; and the iron rod (2) and the magnet (5) are fastened to the clamping components (3) and then are firmly bonded to the sides of the transparent glass (4), then a proper amount of quantum dot suspended liquid (10) is injected into the flexible water storage bag (7), communicates with the extending-and-contacting shell (9) through the guide pipe (8) and is arranged on the blue-ray LED body (6), and the control circuit (1) controls the electromagnetism intensity to adjust the extending-and-contracting distance of the extending-and-contracting shell (9) to give out light with the corresponding color temperatures. The color-adjustable quantum dot LED is clear and simple in structure, convenient to regulate and control and high in color producing performance and can be applied to the intelligent lighting environment to build the healthy lighting environment, and productivity is raised.

The invention provides an LED filament structure and an LED lighting lamp. The LED filament structure comprises a base plate, an LED chip component, a fluorescent material layer and light filter material layers, wherein the LED chip component comprises at least one first LED chip and at least one second LED chip, separation distances exist between the adjacent LED chips, the fluorescent material layer wraps all the LED chips, the light filter material layers are covered on the surfaces of any one of the first LED chips and the second LED chips, when the LED filament structure is just on, the light filter material layers are opaque to light, the fluorescent material layer is made to give off light of first color temperature, in preset time after the filament structure is on, the light filter material layers become transparent gradually, light given off by the first LED chips and the second LED chips both can excite the fluorescent material layer to give off light of second color temperature, and the second color temperature is different from the first color temperature. The LED filament structure and the LED lighting lamp are based on the light filter material layers, by means of change of the environment (such as light and heat), change of the color temperature and brightness of the filament lamp is achieved, the LED filament structure and the lighting lamp are made to approximate an incandescent lamp, the LED filament structure and the LED lighting lamp are simple in structure and easy to realize, a production process is similar to that of the incandescent lamp, and production is facilitated.