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 W_H. The width of the low-concentration fluorescent layer is W_L. The width of the light-emitting unit is W_E. The light-emitting device further satisfies the following inequalities: W_E<W_L, W_H<W_L and 0.8<W_H/W_E≤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.

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 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 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.