44results about How to "Consistent color temperature" patented technology

A light-emitting device including at least one light-emitting unit, a wavelength conversion adhesive layer, and a reflective protecting element is provided. The light-emitting unit has an upper surface and a lower surface opposite to each other. The light-emitting unit includes two electrode pads, and the two electrode pads are located on the lower surface. The wavelength conversion adhesive layer is disposed on the upper surface. The wavelength conversion adhesive layer includes a low-concentration fluorescent layer and a high-concentration fluorescent layer. The high-concentration fluorescent layer is located between the low-concentration fluorescent layer and the light-emitting unit. The width of the high-concentration fluorescent layer is WH. The width of the low-concentration fluorescent layer is WL. The width of the light-emitting unit is WE. The light-emitting device further satisfies the following inequalities: WE<WL, WH<WL and 0.8<WH / WE≤1.2. Furthermore, a manufacturing method of the light-emitting device is also provided.

The invention discloses a preparation method for an inverted LED white-light chip of chip scale package, and the method comprises the following steps: temporarily fixing an UV solidifying adhesive tape (2-1) on the upper surface of a die bonding positioning light cover (1); setting flip chips (3) on the upper surface of the UV solidified adhesive tape (2-1) according to the position of the die bonding positioning light cover (1); employing a fluorescent glue film (4) to cover the flip chips (3); carrying out vacuumizing and heating, and enabling the fluorescent glue film (4) to be solidified and packaged on the flip chips (3); carrying out cutting along gaps among the all packaged flip chips (3); removing the die bonding positioning light cover (1); carrying out UV irradiation and enabling the UV solidified adhesive tape (2-1) to be solidified, and obtaining the inverted LED white-light chip (5) of chip scale package. The method simplifies the technological flow, avoids glue mixing and dispensing in the original technology, improves the production efficiency and yield, and greatly reduces the production cost. The method completely avoids the sinking of phosphor, enables the batch stability of the inverted LED white-light chips (5) to be high, and enabling the color temperature of the inverted LED white-light chips (5) to be consistent.

The invention discloses a temperature compensation control circuit for automatically adjusting the color temperature of an LED (Light Emitting Diode) display screen and a control method. The temperature compensation control circuit comprises an LED display module and an LED driver IC (integrated circuit), wherein the LED driver IC is arranged in a power supply circuit of the LED display module and connected with the temperature compensation control circuit, the temperature compensation control circuit comprises a current limiting resistor R, a matching resistor R1 and a thermistor Rt, the matching resistor R1 and the thermistor Rt are connected with each other in parallel, one ends of the matching resistor R1 and the thermistor Rt after parallel connection are connected with the current limiting resistor R in series in a circuit of the LED driver IC, and the other ends are grounded. The temperature compensation control circuit is simple and reliable, and can be used for adjusting white balance of the LED display screen in real time. When the temperature of the display screen module changes, the current of a red LED can be automatically adjusted by the LED driver IC through the thermistor Rt to achieve the consistent color temperature of the LED display screen.

The invention provides an image processing method for a display device and the display device. The method comprises the following steps of providing direct current for a backlight module of the display device; regulating the magnitude of the direct current according to a brightness control signal to control the brightness of the backlight module; and when the brightness of the backlight module is changed, regulating the color temperature and a gamma curve of the display device to be the same as those of the display device when the backlight module has preset brightness, so that influence of a direct current dimming mode on the quality of a display picture is avoided.

A ceramic green wavelength conversion element (120) is coated with a red wavelength conversion material (330) and placed above a blue light emitting element (110) such that the ceramic element (120) is attached to the light emitting element (110), thereby providing an efficient thermal coupling from the red and green converters (330, 120) to the light emitting element (110) and its associated heat sink. To protect the red converter coating (330) from the effects of subsequent processes, a sacrificial clear coating (340) is created above the red converter element (330). This clear coating (340) may be provided as a discrete layer of clear material, or it may be produced by allowing the red converters to settle to the bottom of its suspension material, thereby forming a converter-free upper layer that can be subjected to the subsequent fabrication processes.

Systems and methods for improving color accuracy and uniformity in LED illumination systems are disclosed including light engines and switching circuits for controlling the addition or subtraction of light from one or more color light sources of the light engines to produce light of a uniform and consistent color. Systems and methods of providing LED light engines and associated illumination spectrums that are both visually appealing and rich in melanopic flux are also disclosed.

The invention provides a method and a device for synchronizing multiple cameras. By obtaining the white balance gain of a main camera to obtain the color temperature of the ambient light source, Then,the white balance gain and color correction matrix of each sub-camera are calculated by using the color temperature of the environmental light source, so that the color temperature of the environmental light source of the main camera and each sub-camera is always consistent, the white balance synchronization and the color synchronization are carried out, the visual difference caused by the colorinconsistency is improved, and the composite effect of the images is improved.

The invention discloses a quick packaging method for a COB-type LED chip. The method includes steps of covering the COB-type LED chip 2 with a fluorescent coating; enabling the fluorescent coating to be adhered to the COB-type LED chip in a vacuum condition; and then heating to enable the fluorescent coating to be solidified and to package the COB-type LED chip in a ordinary pressure condition. In this way, the packaged COB-type LED chip 3 is obtained. According to the invention, technical process of a prior art is simplified; the production efficiency is improved; and the yield rate is improved and the production cost is reduced at the same time. The operation is simple and technical parameters are easy to control. Fluorescent powder settlement is avoided completely, so that COB-type LED chip packaging batch stability is high and the color temperature keeps consistent. The packaged COB-type LED chip obtained by using the method is good in high temperature and low temperature impact and is not easy to get aged during long term use due to firm bonding of the substrate and the package coating. The refraction coefficient is 1.40 to 1.43 and the hardness and the flexibility are moderate.

The invention discloses a data processing method and device for applying fluorescent powder to an LED (light-emitting diode) and a manufacturing method of the device, which are used for solving the problem of precisely applying the fluorescent powder against each chip and keeping the consistency in product quality. The technical scheme in the invention is as follows: the data processing method comprises the following steps: generating a chip data file: processing parameters of optical characteristics of each chip in a collected chip group, and generating the data file for being implemented by a system or being further processed; and generating a fluorescent powder distribution data file: performing data processing on the data file, and generating the fluorescent powder distribution data file against the amount of the fluorescent powder required for each chip according to data in the data file. A chip product applying the technology in the invention has the characteristics of being good in consistency, more humanized, more stable and more convenient to process.

The invention discloses a surface light source. A radiator (1) and a substrate (2) are arranged at lowermost positions; a copper-coated circuit is arranged on the substrate (2); a light source (3) is distributed and welded on the substrate in the form of regular triangle; a light guide plate (5) is arranged on the plane of the light source (3); the distance between the light guide plate (5) and the plane of the light source (3) is 0.5 to 3 times that of the distance between adjacent light sources (3); the lower surface of the light guide plate (5) is provided with mesh points (4); and the distance between adjacent mesh points is less than 0.3 millimeter. Due to the adoption of a combination method, the working temperature of the LED light source can be lowered, light color of the LED light source (3) is kept consistent and high light energy conversion efficiency is kept in addition of the realization of soft light.

The invention belongs to the technical field of display output and provides a method and device for adjusting the color temperature of a video image. The method comprises the steps that a GAMMA fine adjustment module establishes a color temperature feedback channel connected with an LED display screen in a video image capture card; the color temperatures, under different levels of brightness, of a video image fed back by the LED display screen are received through the color temperature feedback channel; a video signal captured by the video image capture card is adjusted with the GAMMA algorithm until the received color temperatures, under different levels of brightness, of the video image and a preset color temperature tend to be consistent. By the adoption of the method and device, it is guaranteed that the color temperatures, under different grey levels, of the video image tend to be consistent, inconsistent white balance of the LED display screen is avoided, and therefore the problem that when the color temperatures of the video image are inconsistent or uneven under different levels of brightness, the LED display screen can not display the video image softly and the video image display effect is poor is solved, and the video image display effect is improved.

The application discloses a mobile terminal and a color temperature adjusting method thereof, wherein the method comprises the following steps: acquiring color temperatures of two adjacent LED units; inputting the currents of the two adjacent LED units according to the color temperatures; and controlling the input currents of the two adjacent LED units according to the currents, so that the color temperatures of the two adjacent LED units are adjusted. Through the ways above, display color difference is relieved and the display effect of pictures is improved.

The embodiment of the invention provides a LED device and the method for controlling luminescence of a LED device. The device comprises a substrate; a LED chip set arranged on the substrate and consisting of a red light LED chip, a green light LED chip and a blue light LED chip; and a LED driving assembly arranged on the substrate, connected with the red light LED chip, the green light LED chip and the blue light LED chip, controls the current of the red light LED chip to be a first current value corresponding to a first color temperature value and controls the current of the blue light LED chip to be a third current value corresponding to the first color temperature value so as to change the technical problem of the limited color temperature of light emitted by an existing LED in the prior art.

The invention discloses a stage lighting adjustment system and a method. The system comprises a DC power supply module, a DMX signal input module, a DSC digital signal controller and a plurality of output channels. The DMX signal input module is connected to the DSC digital signal controller. Each output channel is corresponding to LED lamps having a certain color, and comprises a controlled powerregulator, an anti-oscillation power compensation filter module, a PWM control signal controlled voltage divider, a signal superimposed voltage follower, a current cut-off negative feedback module, acurrent negative feedback module, a high power field-effect tube, a power resistor current detection module and a substrate temperature collection module. The invention not only can realize fine dimming, but also make the color rich and vivid, the service life is prolonged, the stability is increased, and the demand of the professional stage is met to the maximum extent.

A color temperature compensation system comprises a light source, a dimming element for dimming the light source, a color temperature compensation sheet for performing color temperature compensation on light output from the dimming element, in which there are different changes of color value on the color temperature compensation sheet, and a driving mechanism for controlling the movement of the color temperature compensation sheet and driving the color temperature compensation sheet to switch in and switch out of a light path.

The invention discloses a high-temperature-resisting transparent thick-film photoresist and an application thereof in preparing an LED phosphor layer. The photoresist is composed of resin, a photosensitizer, and a solvent. The resin is composed of acrylic resin and a mixture of a monomer of acrylic resin and a monomer of methacrylic resin. With the photoresist provided by the invention, a defect that a phosphor mixed liquid forms a spherical crown shape due to the influence of a support cup is overcome, and the obtained phosphor coating is uniform in thickness. With the method, the light spots of an obtained LED lamp are uniform and saturated; the color temperatures of different LED lamps are constant, and blue spots or yellow spots are prevented from occurring in light spots emitted during LED lamp illumination.

The invention discloses an OLED lighting device, which comprises a base, a plurality of OLED lighting panels and at least one light filter, wherein the OLED lighting panels are arranged on the base side by side; the light filter is attached to one of the plurality of OLED lighting panels; and the light filter is used for adjusting the lighting color temperature of the attached OLED lighting panels. The lighting color temperature of the OLED lighting panel with a relatively large lighting color temperature difference in the plurality of OLED lighting panels is adjusted by the light filter, so that the overall lighting color temperature of the overall OLED lighting device tends to be consistent.

The invention discloses a medical lighting device, comprising: a supporting frame; a plurality of LED light sources arranged on the supporting frame; The lens focuses the light emitted by the multiple LED light sources towards the target location. The medical lighting device improves the utilization rate of the light emitted by the light source, and provides a multi-layered illuminated surface and an ideal surgical lighting space. The optical path structure of medical lighting equipment is simplified, and the volume of medical lighting is reduced while satisfying the function of reducing the shadow of the illuminated object, making it easier for clean air to reach the surgical wound site, eliminating the need for participation in medical activities. Risk of injury to personnel (doctors performing surgical activities, etc.)

A ceramic green wavelength conversion element (120) is coated with a red wavelength conversion material (330) and placed above a blue light emitting element (110) such that the ceramic element (120) is attached to the light emitting element (110), thereby providing an efficient thermal coupling from the red and green converters (330, 120) to the light emitting element (110) and its associated heat sink. To protect the red converter coating (330) from the effects of subsequent processes, a sacrificial clear coating (340) is created above the red converter element (330). This clear coating (340) may be provided as a discrete layer of clear material, or it may be produced by allowing the red converters to settle to the bottom of its suspension material, thereby forming a converter-free upper layer that can be subjected to the subsequent fabrication processes.

The invention relates to a projection control method, device and system, a medium and electronic equipment. The projection control method comprises the following steps of: in response to a received projection instruction, acquiring a first color value of diffuse reflection light formed by diffuse reflection of ambient light through a projection surface and a second color value of current RGB of each set of projection equipment; determining a target gain coefficient of an RGB channel in each set of projection equipment according to the first color value and each second color value; and respectively distributing the target gain coefficient of the RGB channel in each set of projection equipment to the corresponding projection equipment, so that each set of projection equipment adjusts the gain of the RGB channel according to the corresponding target gain coefficient. In this way, the color temperatures of all the regions in the spliced picture can be kept consistent, and the impression experience of a user is improved. Moreover, the color temperature of each region of the spliced picture can be adjusted to be consistent at one time only by acquiring the first color value and each second color value once, so that the efficiency of color temperature consistency adjustment in the projection system is improved.

The invention relates to an image processing method, in particular to an image processing method for a stereoscopic image. The method comprises the following steps: providing image data of a first viewing angle image and image data of a second viewing angle image; according to a first display parameter displayed on a display panel by the image data of the first viewing angle image, carrying out first image processing on the image data of the second viewing angle image so as to ensure that a first display parameter displayed on the displayed panel by the image data of the second viewing angle image corresponds to the first display parameter displayed on the display panel by the image data of the first viewing angle image; and displaying the first viewing angle image and the second viewing angle image processed by the first image.

The present application relates to a method, system, computer equipment and storage medium for controlling the color temperature of stage lamps. The method includes: obtaining the color coordinates and illuminance of each monochromatic lamp, and obtaining the monochromatic Initial illuminance data at the current color temperature of the lamp; calculate the coordinate difference between the color mixing coordinate obtained by mixing the illuminance of the initial illuminance data and the target color coordinate; when the coordinate difference belongs to the first difference range, according to the color mixing coordinate , target color coordinates, R correction coordinates, and B correction coordinates to calculate the illuminance change of R and B; obtain the latest channel values ​​of R and B through the illuminance changes of R and B, and perform color mixing according to the latest channel values The color temperature of each single-color lamp can be adjusted. The invention can solve the problem that the color temperature drift and the color rendering index decrease of different lamps due to the difference between the lamp beads, so that the same color temperature of different lamps will be different, and the practical application requirements are met.

A light-emitting device comprising: at least one light emitting unit, a wavelength converter layer, and a reflective protector.The light emitting unit has an upper surface and the lower surface of each other.The light emitting unit includes a two-electrode pad, and the two electrode pad is located in the lower surface.Wavelength conversion layer is disposed on the upper surface.The wavelength conversion layer includes a low concentration fluorescent layer and a high concentration of fluorescent collapsia.The high concentration fluorescent layer is located between the low concentration fluorescent layer and the light emitting unit.The reflective protector is covered with a light-emitting unit and a partially wavelength conversion layer, and at least the two electrode pad and low concentration fluorescent collapsy layer of the lateral unit are exposed.Width of high concentration fluorescent collaps H .Width of low concentration fluorescent layer is W L .The width of the light emitting unit is W E .The light emitting device is more satisfied with the following inequality.W E <W L W H <W L And 0.8 <W H / W E ≦ 1.2.Also, a method of fabricating a light-emitting device is also provided.

The invention discloses a viscous fluorescent film for fast package of light emitting diode and a preparation method and application thereof. The preparation method is as below: (1) weighing and mixing vinyl silicone rubber, fumed silica, vinyl silicone oil, methyl vinyl MQ silicone resin, hydroxyl silicone oil and LED phosphor to obtain a mixture 1; (2) weighing an inhibitor, a tackifier, a Karstedt catalyst and methyl silicone oil; (3) adding the components in the step (2) into the mixture 1, evenly mixing by a kneader, a two-roll mill or a mixer to obtain a mixture 2, extruding the mixture 2 on a release film, covering another from the release film and calendaring. The viscous fluorescent glue film for fast package of light-emitting diode of the invention can be used in chip scale package of inversion LED white light and package of COB type LED chip. The method simplifies process, avoids the steps of first dam enclosure, then mixing and dispensing glue, improves productivity, increases yield and significantly reduces production cost.

The invention provides an image processing method for a display device and the display device. The method comprises the following steps of providing direct current for a backlight module of the display device; regulating the magnitude of the direct current according to a brightness control signal to control the brightness of the backlight module; and when the brightness of the backlight module is changed, regulating the color temperature and a gamma curve of the display device to be the same as those of the display device when the backlight module has preset brightness, so that influence of a direct current dimming mode on the quality of a display picture is avoided.

The invention discloses a white LED (light emitting diode) chip and a manufacturing method thereof. The white LED chip is manufactured by manufacturing an inner box dam around a chip welding pad, reserving a welding disc, manufacturing an outer box dam at a chip outer frame, reserving a scribing groove, and then coating fluorescent powder between the inner box dam and the outer box dam. With the adoption of the method, a smooth and uniform fluorescent powder coating can be obtained on the surface of the chip, and fluorescent powder chip-level encapsulation can be realized truly. The white chip obtained by the method is consistent in color temperature, and is free from nonuniform light spots of local blue rings or yellow rings.

The invention discloses an LED lighting device. The LED lighting device comprises a base plate and at least one LED chip which is fixedly arranged on the base plate, the base plate is of a flat sheetstructure and is provided with a slot, and the LED chip is embedded in the slot. The slot of the base plate can be embedded with adequate LED chips as required, and lighting power is improved and thelighting device has good lighting effect when a plurality of the LED chips are silmultaneously embedded into the slot. In addition, as the base plate is of the flat sheet structure, light given out bythe LED chips embedded in the slot is not blocked and has large enough lighting angle; and when a plurality of the LED chips are silmultaneously powered on, area light source is formed on the surfaceof the base plate, thus light given out by the lighting device is more even and lighting effect is better.

The invention discloses an LED light-emitting device for illuminating fresh meat in supermarkets, and the device comprises at least two light-emitting diodes (LEDs), wherein the emission spectrum of the device comprises an emission peak which is generated by one LED and within the wavelength range of 400-500 nm, an emission peak which is generated by enabling the LED to excite fluorescent powder and within the wavelength range of 500-600 nm and an emission peak which is generated by the other LED and within the wavelength range of 600-630 nm. The LED light-emitting device is consistent with atraditional fluorescent lamp for irradiating fresh meat in color temperature and visual effect, can be used for replacing a fluorescent lamp, avoids the problem of mercury pollution, and is higher inlight efficiency and longer in service life than an original fluorescent lamp.

The present invention relates to a photography flash lamp device. The photography flash lamp device is disposed in a mobile terminal. The photography flash lamp device includes a driving circuit, a cold color light lamp, a neutral color light lamp, and a warm color light lamp; the driving circuit is provided with a first output end and a second output end; the first output end of the driving circuit is electrically connected with the cold color light lamp; the second output end of the driving circuit is electrically connected with the warm color light lamp; and the neutral color light lamp iselectrically connected with the first output end or the second output end of the driving circuit. The invention also provides a mobile terminal. With the photography flash lamp device and mobile terminal of the invention adopted, a photographing effect in a dark environment can be improved, so that the color temperature of a photographed image is consistent with the color temperature of the environment, and therefore, the clarity and accuracy of the photography can be improved, and user experience is good.