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 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 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 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 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.