300results about How to "Color temperature adjustable" patented technology

The present invention is directed to color tuning methods for electrophoretic display devices. For example, a color tuning agent may be added to a composition for forming a display cell structure or a primer layer. Alternatively, a separate color tuning layer may be added to a display device. Further, a color tuning agent may be added to an electrophoretic display fluid. The color tuning methods are useful for adjusting the color temperature of a display device.

A back lighting system for illuminating a display device comprises a light-emitting panel (1) and a light source (6) for coupling light into the light-emitting panel. The light source comprises a low-pressure discharge lamp (6; 7). The light source additionally comprises a plurality of LEDs (8, 8′, . . . ; 9, 9′, . . . ) for selectively setting the color temperature of the light emitted by the light source. Preferably, the LEDs increase the color temperature of the light emitted by the light source. Preferably, the light emitted by the back lighting system ranges from 6,000 to 10,500 K. Preferably, the LEDs are blue light emitting LEDs, each preferably having a luminous flux of at least 5 lm. The color point of an image to be displayed on a display screen of the display device is set by the back lighting system, thus enabling an optimum contrast to be achieved for the image to be displayed by the display device.

The invention provides an LED atmosphere illumination control system, which adopts the standard DMX512 control protocol and a bus type network structure. A controller intensively controls all LED lamps. The system comprises an embedded light synchronous controller, an indoor atmosphere illumination controller, a general high-power LED drive, a transmission medium and the LED lamps. The system canperform scene mode control by network control mode, remote control mode, automatic control mode, manual control mode and various control modes; no less than nine scene modes are preset or can be freely set according to individual preference; digital diming can be achieved by an embedded program, and the illumination and the color tone of the light can be controlled precisely; and each lamp can beindependently controlled or can be controlled by networking. The system can ensure the evenness of the illumination effect while achieving the energy-saving illumination control and is widely applicable to local intensive illumination control of public places and families.

A system and method are described herein for controlling the white balance and providing gamma correction without compromising gray-scale dynamic range in a flat panel liquid crystal display (LCD). According to one embodiment of the present invention, the flat panel LCD includes electronic circuitry for coupling to a host computer to receive a white-balance adjustment control signal, and electronic circuitry for receiving image data to be rendered on the flat panel LCD. Further, the flat panel LCD of one embodiment is configured for coupling to a color-sensing device to receive optical characteristics data of the flat panel LCD detected by the color-sensing device. The white balance adjustment mechanisms include the provision of two or more light sources of differing color temperature, whose brightness can be independently varied (and distributed through a light distribution mechanism) to adjust color temperature without altering the grayscale resolution of the RGB colors. The present invention further includes white balance adjustment software and gamma correction software for generating white-balance adjustment control signals and appropriate gamma correction curves.

The invention discloses a silicone lens for LED (Light Emitting Diode) packaging, which is used for being adhered to the surface of a COB (Chip On Board) packaging body so as to improve the light extraction efficiency. The silicone lens is in a convex surface structure, and comprises at least two silicone layers arranged in sequence from inside to outside, wherein the refractive index of the silicone layer positioned on the outer layer is smaller than or equal to that of the silicone layer positioned on the inner layer. The multi-layer silicone lens disclosed by the invention can greatly improve the light extraction efficiency of an LED light source, particularly a high and medium power COB packaging body.

An illumination controller controls a light source unit having multiple types of light sources that emit light of different colors. The controller including: a dial, which is rotatable, used to adjust a color temperature and an illuminance of light irradiated from the light source unit; a memory which stores one or more control curves in which the color temperature and the illuminance of light irradiated from the light source unit change in conjunction with each other; and an adjustment unit used to adjust one of the control curves stored in the memory. Thus, when the dial is rotated, the color temperature and the illuminance of light irradiated from the light source unit change according to values determined by the control curve which is adjusted by the adjustment unit.

A LED lighting module having tunable correlated color temperature and control method thereof is disclosed. The control method comprises steps of: (a) receiving an AC voltage signal and converting the AC input signal into a first AC signal; (b) receiving the first AC signal and converting the first AC signal into a first DC signal; (c) comparing the first DC signal with a plurality of reference voltages by the control unit, wherein the reference voltages comprise driven voltages of one of the LED strings or driven voltages of serially-connected LED strings; and (d) if the first DC signal exceeds the reference voltage of the corresponding LED string or the corresponding serially-connected LED strings, the corresponding LED string or the corresponding serially-connected LED strings is driven so as to adjust the correlated color temperature of the light emitted by the LED lighting module.

A currently-available white LED can be modified to freely set a color temperature as well as to improve a color rendering property. A correction-color LED or LEDs having a peak wavelength in a specific wavelength region in association with a white LED are provided to make a color temperature-regulable LED which permit the correction of not only a color temperature but also a color rendering property by means of color-mixture of the correction-color LED and the white LED considering the color temperature and a spectrum distribution of the white LED. The color temperature-regulable LED is especially useful as an shadowless operating light, a living room light and a decorative light.

A display device includes: a light emission amount detecting section which inputs video signals having linear property and detects an amount of light emission from the video signals; a light emitting time calculating section which calculates light emitting time of the light emitting elements based on the amount of light emission detected by the light emission amount detecting section; a light emitting time recording section which records the calculated light emitting time; a luminance acquiring section which, acquires luminance information of the light emitting elements using the light emitting time recorded in the light emitting time recording section; a coefficient calculating section which calculates coefficients by which the video signals are multiplied based on the luminance information acquired by the luminance acquiring section; and a coefficient multiplying section which multiplies the video signals by the coefficients calculated by the coefficient calculating section.

The invention discloses a light conversion unit having a color conversion function. The light conversion unit comprises a semi-permeant semi-reflecting conductive layer, a color conversion layer and a reflecting layer, wherein the semi-permeant semi-reflecting conductive layer, the color conversion layer and the reflecting layer are arranged in an overlaid mode. The invention further relates to an organic electroluminescence device with the light conversion unit. The organic electroluminescence device comprises the light conversion unit, an organic function layer and a second electrode layer, wherein the light conversion unit, the organic function layer and the second electrode layer are arranged in an overlaid mode, and the semi-permeant semi-reflecting conductive layer of the light conversion unit is close to the organic function layer. The organic electroluminescence device with the light conversion unit has high light conversion efficiency and light extraction efficiency.

The invention discloses a four-color LED light mixing method based on visible light communication. The method comprises the steps that spectral power distribution of all monochromatic light is obtained through a spectrograph, and the tristimulus value of each corresponding monochromatic light is calculated; the target color temperature of mixed light is determined, and a corresponding reference light source is selected and used for obtaining the tristimulus value of a mixed color; according to the color addition principle, the sum of the tristimulus values of all the monochromatic light should be equal to the tristimulus value of the mixed color, and a color mixing equation set is obtained; the spectral power distribution of the mixed light can be obtained according to the light mixing coefficient of all the monochromatic light in the color mixing equation set, and the color rendering index Ra of the mixed light is calculated according to the spectral power distribution of the mixed light, wherein Ra is larger than or equal to epsilon; the range of the channel capacity C of the mixed light is calculated, and the maximum capacity Cmax is solved within the range; the ratio of all the colored light with the maximum capacity is output.

A lighting device includes a base, a light source, an optical color wheel, and a lens. The base has a plurality of fins for heat dissipation. The light source is disposed in the base, and the optical color wheel is disposed above the light source and in contact with the base. The lens is movably disposed on the base. The Light from the light source passes through the optical color wheel to form colored light. The colored light passes through the lens to form a light beam. Heat generated by the light source and the optical color wheel is dissipated by the fins.

The invention discloses a white light LED (Light Emitting Diode) device and a manufacturing method thereof, wherein the device comprises a base plate and at least one LED chip fixed on the base plate; a quantum dot composite light emitting material plate is arranged above the LED chip; and a transparent encapsulating material is filled between the LED chip and the quantum dot composite light emitting material plate. The manufacturing method comprises the following steps of: firstly fixing the LED chip on the base plate and welding a golden wire; then encapsulating the LED chip by filling the transparent encapsulating material; placing the quantum dot composite light emitting material plate above the encapsulating material and fixing the plate on the base plate; and finally, heating, curing and cooling the plate naturally to obtain the white light LED device. The invention provides the white light LED device with an optimized structure, high brightness, high lighting effect and high color rendering index by using the advantage that light emitted by quantum dots is continuous and adjustable in a visible light range; the manufacturing method and technology are convenient; and the manufactured LED device is simple in structure and stable in performance.

The present invention is directed to the provision of an LED light source that can easily adjust its chromaticity and a chromaticity adjustment method for such an LED light source. More specifically, the invention provides a chromaticity adjustment method for an LED light source having an LED device, a phosphor which absorbs a portion of light emitted from the LED device and emits light by wavelength conversion, and a resin material containing the phosphor and disposed so as to enclose the LED device, wherein an ink coating layer is disposed on a surface of the resin material in order to adjust chromaticity; the invention also provides an LED light source adjusted in such a manner.

The invention discloses a brightness and color temperature controlling system for an LED (light-emitting diode) lamp. The brightness and color temperature controlling system comprises an LED module, a control chip and at least one driving module, wherein the LED module includes a plurality of LED illuminating units, the output end of the control chip is connected with the input end of the driving module, and the output end of the driving module is connected with the plurality of LED illuminating units. According to the brightness and color temperature controlling system for the LED lamp, brightness and color temperature of the LED lamp can be controlled individually, and brightness of the LED lamp can be freely adjusted when a color temperature parameter is fixed, so that brightness of the LED lamp does not change when color temperature of the LED lamp is adjusted.

A vehicle lighting device including a light source module, a light valve, a sensing unit, a projection lens set and a control unit. The light source module provides an illumination beam. The light valve is located on a transmission path of the illumination beam, and is capable of being switched to different states for adjusting the illumination beam. The sensing unit senses the front of the vehicle lighting device and generates a signal. The projection lens set is disposed on an optical path of the illumination beam for projecting at least a portion of the illumination beam. The control unit is electrically connected to the light valve and the sensing unit for receiving the signal. The control unit controls the light valve to adjust a light distribution pattern of the illumination beam according to the signal, and project the illumination beam to the front through the projection lens set.

The invention discloses an LED (light emitting diode) lamp capable of adjusting color temperature and brightness, and provides an LED lamp capable of remotely adjusting color temperature and brightness. The LED lamp comprises a shell, LEDs arranged in the shell, a power supply module which is connected with the LEDs and is used for driving the LEDs, and an infrared inductive head used for receiving an infrared remote control signal, wherein, the LEDs comprise cold white light LEDs and warm white light LEDs which are arranged in a staggered manner; the power supply module comprises a current and mixed color on-off control circuit and a constant-current control circuit, the input terminal of the current and mixed color on-off control circuit is connected with the output terminal of the infrared inductive head so as to output an on-off control signal according to the infrared remote control signal received by the infrared inductive head, and the input terminal of the constant-current control circuit is connected with the output terminal of the current and mixed color on-off control circuit so as to adjust the drive current of the LEDs according to the on-off control signal; and the output terminal of the constant-current control circuit is connected with the LEDs. The LED lamp provided by the invention is especially suitable for an LED sphere bulb.

The invention relates to an LED-chip shining-light-bar base plate material and an LED bulb lamp. The LED-chip shining-light-bar base plate material and the LED bulb lamp are characterized in that the LED bulb lamp is composed of shining strips (1), a driving power source (2), a glass bulb shell (3), a glass support core column (4) and an electric connector (5); the glass bulb shell (3) and the glass support core column (4) are subjected to vacuum sealing to a cavity to be filled with high thermal conduction gas, the glass support core column (4) and the shining strips (1) fixed on the glass support core column (4) are contained in the sealed cavity; the shining strips (1) are sequentially electrically connected with the driving power source (2) and the electric connector (5); the LED-chip shining strips (1) are composed of YAG, wherein Ce raw material powder and nitride red fluorescence powder are fired to achieve the effect that one face of the base plate material (6) comprises LED blue light chips (9), and the surfaces of the blue light chips (9) are coated with a fluorescent powder layer (7). According to the LED-chip shining-light-bar base plate material and the LED bulb lamp, low-cost preparing of the high-quality transparent fluorescence polycrystal base plate material is achieved with the novel environment-friendly aqueous tape-casting technology. The fluorescence polycrystal base plate material which is high in lighting efficiency, color rendering index and optical transmittance and the bulb lamp which is good in color-temperature consistency heat dissipation, high in reliability and long in service life are obtained.

The invention discloses a color temperature adjustable LED mixed lighting light modulation method comprising the following steps: S1, setting the color temperature and lightness level of the lighting system, and entering the next step; S2, searching various LED driving current values according to a searching table when a micro-processing system receives a set signal, forming a current control signal, and entering the next step; S3, allowing all DC drivers to form corresponding driving currents after receiving the current control signal, driving all LEDs to illuminate, and entering the next step; S4, allowing all LEDs to light up so as to form the mixed lighting effect, and reaching corresponding illumination demands. The system uses more than two LEDs of different color temperatures to mix the lights, thus providing color temperature adjustable effect and the relative constant color temperatures in the LED light intensity adjusting scope, and dividing the light intensity adjusting grades according to the human eye perception (lightness) on the light intensity.

The invention discloses a light source drive circuit and a brightness and color temperature controller. The light source drive circuit is used to adjust the brightness and color temperature of a light source, and comprises a power converter and the brightness and color temperature controller coupled to the power converter. The power converter is connected between a power source and the light source, and used to receive electric energy from the power source and provides the adjusted electric energy to the light source. The brightness and color temperature controller is used to receive a conduction detection signal which is used to indicate the conduction state of a three-end silicon-controlled light modulator connected between the power supply and the power converter, and adjust the brightness of the light source based on the conduction detection signal. The brightness and color temperature controller is also used to receive a switch monitoring signal which is used to indicate ON / OFF operation of a switch connected to the three-end silicon-controlled light modulator, and adjust the color temperature of the light source based on the switch monitoring signal. The power switch is operated to adjust the brightness and color temperature of the light source simultaneously, no extra special device is needed, operation is simple and convenient, and the cost is reduced.

The invention discloses an LED lamp and a dimming method thereof. The LED lamp comprises a lamp panel, an AC / DC convertor arranged on the lamp panel, a single-chip microcomputer, a DC / DC constant current drive circuit, 3 linear constant current drive circuits, a warm white LED lamp string, a cold white LED lamp string, a red LED lamp string, a green LED lamp string, a blue LED lamp string, a radio frequency module, a remote control unit cooperated with the radio frequency module and a lamp cover. The LED lamp and the dimming method have the advantages of being convenient for the adjustment of color, color temperature and brightness, and being capable of realizing various light change effect.

A color temperature adjusting device includes a display unit that displays a first pointer indicating default values of chromaticity x, y and a second pointer indicating an adjustment value of the chromaticity x, y within a frame in a corresponding manner to scales of the x coordinate and the y coordinate marked on the frame, an operating unit that is used to change the x coordinate and / or the y coordinate of the second pointer, and a control unit that sends out the adjustment value indicated by the second pointer by an operation of the operating unit, to the monitor through a communication processing unit, and in a case where the monitor changes the color temperature, receives the values of the chromaticity x, y from the monitor through the communication processing unit so as to reflect and display the values of the chromaticity x, y on the display unit.

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, relating to the technical field of phosphor, particularly discloses a phosphor represented by (M1-xRex)3Al5-ySiyO12-y-zNy+z, wherein M represents one or more elements of Y, Lu, Gd, and Tb, Re represents one or two elements of Eu, Ce and Pr, x is no larger than 0.1, y is no less than 0 and no larger than 1.0, and z is no less than 0 and no larger than 1.2, the initial raw materials comprise a pure oxide of M, a pure oxide of Re, nano alpha-Al2O3, a nitride and analytically pure HBO3 / NH4F / LiF as a sintering aid which accounts for 1 wt% of the weight of the initial raw materials, and the nitride is nano amorphous Si3N4. Compared with the prior art, by using the nano amorphous Si3N4 to introduce the Si4+-N3-bond, the synthetic phosphor can keep high luminous efficiency and thermostability while the emission spectrum is continuously red shifted.

Light emitting diode chip of nitride is as excitation light source, and a gold wire is welded on the chip being installed on rack. Epoxy resin is coated on the chip and rack, and solidified epoxy resin is formed in spherical cap shape. Then, blending phosphor powder in white light prepared by matching epoxy resin with light emitted from chip is coated and solidified on the said spherical cap shaped epoxy resin so as to form a fluorescent layer. Finally, using transparent resin carries out conventional encapsulation to form a light cover. The said blending is prepared from epoxy resin, phosphor powder and diffusion powder in weight ratio as 0.5 - 1.2 : 0.02 - 0.1 : 0.01 - 0. 03. Adding diffusion powder of affecting shape of light beam and light spot into the blending, the invention intensifies purity of white light. Adjusting the blending can adjust color temperature of white light.

The invention relates to an LED (Light Emitting Diode) drive circuit capable of adjusting light and color temperature. The LED drive circuit is adopted for driving an LED lighting device which consists of N paths of LED string lights, wherein N is more than or equal to 2. The LED drive circuit comprises a constant current generating circuit, a buffer circuit, a selection circuit and a control circuit. According to the light adjusting and color temperature adjusting demand of the LED lighting device, a corresponding control signal is generated by the control circuit to control the states of the constant current generating circuit and the selection circuit. A direct current input voltage and the control signal are received by the constant current generating circuit, so that a constant output current is generated to drive the LED lighting device. The buffer circuit is connected to the output end of the constant current generating circuit, so that the output voltage which is output by the constant current generating circuit is limited. The selection circuit is connected with N paths of the LED string lights, so that the corresponding LED string light is selected according to the control signal and driven by the output current.

The present invention relates to a white light-emitting diode with high uniformity and wide angle intensity distribution, and particularly relates to a color temperature tunable white light-emitting diode with high uniformity and wide angle intensity distribution. A nano-phosphor material is coated on one surface of a lampshade of the white light-emitting diode to form a white light phosphor layer for providing a stable white light with high uniformity, wide angle intensity distribution, and good illuminance. Furthermore, the color temperature of the white light-emitting diode can be adjusted by changing the ratio of compositions of white light phosphor layer.

The invention discloses a remotely-excited fluorescent polycarbonate composite material and a preparation method thereof. The remotely-excited fluorescent polycarbonate composite material is prepared from 93 to 99 parts of polycarbonate, 0.5 to 1 part of an organosilicone photodiffusion agent, 3 to 5 parts of fluorescent powder, 0.2 to 0.4 parts of an anti-oxidant, 0.1 to 0.2 parts of a lubricant and 0.3 to 0.5 parts of a light stabilizer. The preparation method comprises the following steps of 1, uniformly stirring the organosilicone photodiffusion agent, the anti-oxidant, the lubricant and the light stabilizer by a high-speed mixer, 2, putting polycarbonate and the uniform mixture obtained by the step 1 into the high-speed mixer together, and carrying out uniform stirring, and 3, adding the uniform mixture obtained by the step 2 into a twin-screw extruder in a main feeding way, adding the fluorescent powder into the twin-screw extruder in a side feeding way, and carrying out extrusion granulation to obtain the remotely-excited fluorescent polycarbonate composite material. The remotely-excited fluorescent polycarbonate composite material can be used for preparation of a LED lampshade. The LED lampshade has a certain distance from a LED luminous chip so that the fluorescent powder is excited remotely. The remotely-excited fluorescent polycarbonate composite material has stable performances and uniform color temperatures, and greatly prolongs a LED lamp service life. The preparation method has the simple processes.

The invention provides a full-color phosphor of a single substrate single mixed lanthanum aluminate base with adjustable colors as well as a manufacture method. The invention belongs to the technical fields of photoelectric materials and apparatuses. The chemical formula of the phosphor is La1-aAlO3:Eua,Li<+>b, wherein, accounted by molal quantity, a is equal to or more than 0.02 and equal to or less than 0.2; b is equal to or more than 0.00 and equal to or less than 0.4; under the excitation of lights with wavelengths of 250nm to 400nm, the phosphor can simultaneously have three emission areas which include the blue lights the emission wavelengths of which are 440nm, the green lights the emission wavelengths of which are 515nm and the red lights the emission wavelengths of which are 592 and 618nm for composing the white light. The manufacture process is as follows: the weighed materials are dissolved into alcohol for forming serum and manufactured into powder through ultrasonic surging and drying; then the mixed gas of N2 and H2 is used as the reduction atmosphere for obtaining the phosphor under high temperature ignition. The spectrum characteristics of the phosphor can be effectively adjusted through adjusting the preparation technical conditions which include the ignition time, the ignition temperature, the reduction atmosphere and the adding concentration of a charge compensation agent of Li<+>. The full-color phosphor can be used for the white light apparatuses of a white light LED, a fluorescent lamp, and the like.