12196 results about "Light-emitting diode" patented technology

An optical physiological sensor can be integrated into a wearable device and can comprise a substrate having an optical center, a first emitter group of light emitting diodes (LEDs) positioned adjacent to the optical center of the substrate and spaced at an offset from the optical center, a second emitter group of LEDs positioned adjacent to the optical center of the substrate at an offset to the optical center and spaced at an offset from the optical center opposite the first emitter group of LEDs relative to the optical center, and a plurality of detectors arranged in a spatial configuration that surrounds the first and the second emitter group. Each of the plurality of detectors can be positioned on the substrate a same distance away from the optical center of the substrate.

Various illustrative systems, devices, and methods for face masks are provided. In general, a face mask is configured to provide light therapy to a user wearing the face mask. In an exemplary implementation, the face mask includes a light assembly configured to apply light therapy to a user wearing the face mask. The light assembly includes a plurality of lights, such as light emitting diodes (LEDs), configured to emit light and thereby provide light therapy to the user's face. The face mask also includes a protective member configured to protect the user's eyes from the light emitted by the lights. The protective member is configured to form a seal against the face of the user wearing the face mask and is configured to dynamically conform to a user's face.

The invention relates to the technical field of intelligent lighting, and discloses a light emitting diode intelligent dimming system based on multispectral control, which comprises a multi-sensor data acquisition module, a data fusion processing unit, a user behavior prediction module, a dynamic spectrum adjustment module and the like. Environmental data are collected in real time through multiple sensors, user behaviors are predicted in combination with a machine learning algorithm, and personalized adjustment and dynamic response of illumination are achieved. The system can accurately adjust the color temperature, brightness and spectral distribution of the light source according to the changes of ambient light, temperature and humidity, human body activities and the like, and provides a more efficient and energy-saving illumination scheme. Meanwhile, through cooperative work of the Internet of Things technology and intelligent equipment, the comfort level of the whole environment is optimized. Particularly, the intelligent feedback and learning module of the system continuously optimizes the control strategy according to the use feedback of the user, the user experience and the adaptability of the system are further improved, and a comfortable and intelligent lighting environment is provided for the user.

Apparatus and methods for lighting. The apparatus may include a retention body. The retention body may be retained in a housing. The apparatus may include a rotatable body. The rotatable body along with the retention body may define a central axis. The rotatable body may rotate relative to the retention body. The apparatus may include an articulating body. The articulating body may include a light emitting diode (“LED”) light source. The articulating body may tilt relative to the rotatable body. In operation the LED light source may generate heat. The housing, the retention body, the rotatable body and the articulating body may dissipate the heat. The housing, the retention body, the rotatable body and the articulating body may dissipate the heat so that the housing has a surface temperature that does not a predetermined maximum surface temperature.

A variable-wavelength light emitting diode (LED) is provided. The variable-wavelength LED comprises an n-doped portion, a p-doped portion, and a light-emitting region located between the n-doped portion and the p-doped portion. The light-emitting region comprises a light-emitting layer which emits light at a peak emission wavelength under electrical bias thereacross. The LED is configured to receive a power supply, and the peak emission wavelength of the LED is continuously controllable over an emission wavelength range of at least 40 nm by varying the power supply. A display device comprising this variable-wavelength LED, a method of controlling said variable-wavelength LED and a method of manufacturing a variable-wavelength LED are also provided.

The invention relates to the technical field of organic photoelectric materials, in particular to a triazine compound, an OLED with the compound and an organic light-emitting device with the compound. According to the triazine compound disclosed by the invention, a triazine structure is taken as a core, and aryl and alkyl are combined with a fluorenyl group to form side chain matching, so that the compound has excellent luminous efficiency and relatively good thermal stability; meanwhile, when the triazine compound provided by the invention acts on a device, the organic light-emitting device can effectively have lower driving voltage and maintain the stability of the voltage, the light-emitting efficiency is improved, the service life is obviously prolonged, and the triazine compound has a very good application prospect.

A stuffed, interactive children's toy for assisting individuals in self-calming and / or self-regulating exercises. The toy may include one or more weights, a microphone, a motor, one or more light emitting diodes (LEDs), and / or one or more speakers. The toy optionally further includes one or more buttons corresponding with one or more emotional states. For example, a red button, a yellow button, and / or a green button. Upon pressing the button, the toy may deliver either a random and / or a preprogrammed intervention. The toy may be used in combination with a children's book. In another example, the toy may be in communication with a mobile application (app) via a Bluetooth connection. In yet another example, the toy may be in communication with a website and / or a remote-control device. The app may be used to record emotional data, physical date, and / or to assign preprogrammed stimuli to the one or more buttons.

The invention provides a Demura compensation data generation method of an AMOLED (Active Matrix / Organic Light Emitting Diode) panel and related equipment. The method comprises the following steps: respectively acquiring corresponding brightness data of each pixel position on a target AMOLED display panel when a multi-stage typical gray scale is input under a multi-stage typical display brightness value and a multi-stage typical refresh rate; constructing a brightness-gray scale mapping model according to a mapping relation between the brightness data and each stage of typical gray scale; counting the brightness data to obtain a brightness mean value as standard brightness, and importing each brightness-gray scale mapping model to obtain an actual expected gray scale of each pixel position; the difference value between the actual expected gray scale and the input typical gray scale is solved, the gray scale compensation value of each pixel position is obtained and used for constructing a compensation lookup table, interpolation fitting is carried out on the compensation lookup table, the compensation lookup table of the target AMOLED display panel under the full display brightness value, the full refresh rate and the full gray scale is obtained, the brightness uniformity of the panel is improved, and the display quality of the AMOLED display panel is improved. And the production yield is improved.

The invention provides a light-emitting diode chip and a preparation method thereof, and the light-emitting diode chip comprises a conductive silicon wafer, a metal bonding layer, an N-type conductive metal layer, a first insulation protection layer, a P-type conductive metal layer, a P-type reflection metal layer, a current blocking layer, a current expansion layer, and an epitaxial layer which are stacked from bottom to top. The projection of the edge of the P-type conductive metal layer on the current expansion layer is located in the projection of the isolation groove on the current expansion layer, and the ratio of the distance between the projection of the edge of the P-type conductive metal layer on the current expansion layer and the projection of the edge of the isolation groove on the current expansion layer to the width of the isolation groove is 1 / 3-2 / 3. The isolation groove and the cutting wall are arranged on the current expansion layer, and the distance proportion relation between the edge of the P-type conductive metal layer and the isolation groove is favorable for controlling the distribution of current in the light-emitting diode chip, so that the current is prevented from being excessively concentrated, the current is more uniformly expanded to the epitaxial layer, and the overall light-emitting efficiency and stability of the light-emitting diode chip are improved.

System and method for controlling one or more light emitting diodes. For example, the system includes: a current regulator including a first regulator terminal and a second regulator terminal, the first regulator terminal being configured to receive a diode current flowing through the one or more light emitting diodes, the current regulator being configured to generate a sensing signal representing the diode current, the second regulator terminal being configured to output the sensing signal; a bleeder controller including a first controller terminal and a second controller terminal, the first controller terminal being configured to receive the sensing signal from the second regulator terminal, the bleeder controller being configured to generate a first bleeder control signal based at least in part on the sensing signal, the second controller terminal being configured to output the first bleeder control signal.

The invention discloses processing equipment for a light emitting diode, and relates to the technical field of diode production, the equipment comprises four stations, namely a feeding station a, a rotating station b, a plugging station c and a discharging station d, and further comprises a main body frame, the main body frame comprises a mounting table arranged on the main body frame, and a fixed table is fixedly mounted on the surface of the mounting table; the clamping mechanism comprises four rotating sliding plates mounted on the fixed table, and an upper clamping plate and a lower clamping plate are mounted on the surface of each rotating sliding plate in a sliding manner; through the reset effect of the rotating mechanism and the effect of the discharging mechanism, the plugged diodes fall off from the mechanism, so that the purpose of rapid discharging is completed, at the moment, in the process of moving from the discharging station d to the feeding station a, the upper clamping plate and the lower clamping plate are reset through the effect of the deflection mechanism, the plugging mechanism and the discharging mechanism, and the diodes are rapidly discharged. Therefore, the purposes of quickly and circularly plugging the diode and improving the production efficiency are achieved.

A display module includes a substrate including a mounting surface and a side surface; a Thin Film Transistor (TFT) layer provided on the mounting surface of the substrate; a plurality of inorganic light emitting diodes mounted on the mounting surface of the substrate; an anisotropic conductive layer provided on an upper surface of the TFT layer and electrically connecting the TFT layer to the plurality of inorganic light emitting diodes; a front cover covering the mounting surface; and a side cover surrounding the side surface. A side end of the front cover extends to a region outside the mounting surface, and the side cover is bonded to a lower surface of the front cover and to the side surface of the substrate which correspond to the region outside of the mounting surface.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to a boron-nitrogen compound with a polynary fused ring, an OLED (Organic Light Emitting Diode) with the compound and an organic light-emitting device with the compound. According to the boron-nitrogen compound disclosed by the invention, through matching of a fused heterocyclic structure and limited groups such as tertiary butyl and naphthenic base, the thermal stability of the compound can be improved, and the boron-nitrogen compound has an excellent luminescence characteristic; the boron-nitrogen compound provided by the invention is used as a light-emitting layer material, so that the organic light-emitting device can effectively have lower driving voltage and maintain the stability of the voltage, and the light-emitting efficiency is improved.

An apparatus may include: (a) a processing chamber including chamber walls and a chamber heater; and (b) a pedestal positioned within the chamber interior and including: (i) a substrate heater having a plurality of light emitting diodes (LEDs), (ii) a window positioned above the substrate heater comprising a material transparent to light from the LEDs, (iii) three or more substrate support pads configured to support a substrate such that the window and the substrate are offset by a nonzero distance; and (iv) a temperature sensor comprising a first detector configured to measure thermal radiation emitted by the substrate, and a second detector configured to measure light transmitted through the substrate.

Micro-light emitting diode (uLED) devices comprise: a plurality of micro-light emitting diodes (uLEDs), each of the uLEDs comprising: a pixel; an N-contact in contact with the pixel and having an N-contact top surface; a P-contact in contact with the pixel and having a P-contact top surface; an N-contact test pad on the N-contact top surface and having an N-contact test pad surface; and a P-contact test pad on the P-contact top surface and having a P-contact test pad surface; and a primary release layer positioned between all of the N-contacts and P-contacts of the uLEDs. Test apparatus and methods of making and testing the same are also provided.

The invention discloses a micro light-emitting diode display chip, a preparation method and a display device, and the chip comprises a driving substrate which comprises a plurality of contacts; the multiple display screens are arranged on the driving substrate at intervals, and the multiple display screens are located on the same plane; the display screen comprises a plurality of LED units arranged in an array, the LED units are used for emitting light of a first color, and the LED units are independently driven through corresponding contacts; the wavelength conversion layer is arranged on the side, away from the driving substrate, of the display screen. In the display chip, the plurality of display screens located on the same plane are arranged on the driving substrate, the whole screen uses the same basic primary color, then full-color display of the whole chip can be completed by using a quantum dot process, and due to the fact that the whole surface is the same basic primary color, the bonding yield of the LED unit 201 is greatly improved.

The invention discloses a transparent composition photoresist with low shrinkage and low vacuum deflation. Comprising the following raw materials in percentage by mass: 1-5% of modified polyhedral oligomeric silsesquioxane (POSS), 1-5% of an expanding monomer, 1-5% of modified acrylic resin, 1-5% of epoxy resin, 1-5% of a thiol cross-linking agent, 1-5% of an initiator, 0.1-3% of a curing accelerator, 0.2-0.5% of a flatting agent, 0.1-5% of a silane coupling agent, 0.01-0.2% of an antioxidant and 80-90% of an electronic-grade organic solvent. The invention also provides a preparation method of a cured coating prepared from the transparent composition photoresist with low shrinkage and low vacuum deflation. The product provided by the invention not only can maintain the properties of high hardness, high thermal stability, high planarization ability, high barrier property, low hygroscopicity, low dielectric constant and the like of the transparent composition photoresist coating, but also can enable the transparent composition photoresist coating to have excellent low shrinkage and low outgassing, thereby achieving the purposes of saving energy, reducing emission, reducing cost and improving efficiency; the low shrinkage of the transparent composition photoresist coating also widens the development of the material in the fields of other panel production processes such as OLED (Organic Light Emitting Diode) and the like.

The invention relates to the technical field of semiconductor devices, in particular to a multi-wavelength light emitting diode and a light emitting module. According to the multi-wavelength light-emitting diode, a multi-quantum well layer comprises n groups of quantum well light-emitting units with different forbidden bandwidths; the n group of quantum well light-emitting units and the (n-1) group of quantum well light-emitting units meet at least one of the following characteristics: (a) the concentration of In in at least one well layer of the n group of quantum well light-emitting units is greater than the concentration of In in at least one well layer of the (n-1) group of quantum well light-emitting units; and (b) the thickness of at least one well layer of the n group of quantum well light-emitting units is greater than that of at least one well layer of the (n-1) group of quantum well light-emitting units. Through the arrangement of the multiple groups of quantum well light-emitting units, under the condition that multiple wavelengths can be generated, stress is fully released, and the photoelectric conversion efficiency is improved.

A display device includes a substrate including a display area and a peripheral area adjacent to the display area, a plurality of light-emitting diodes arranged in the display area, a first inorganic encapsulation layer disposed on the plurality of light-emitting diodes, an organic encapsulation layer disposed on the first inorganic encapsulation layer, a plurality of inorganic patterns disposed on the organic encapsulation layer and spaced apart from each other, and a touch electrode disposed on the organic encapsulation layer and defining a plurality of electrode holes respectively overlapping the plurality of light-emitting diodes in a plan view.

The invention discloses a nitride full-color integrated miniature light-emitting diode display chip and a preparation method thereof, a columnar or halfpace-shaped table surface is formed on the surface of a silicon substrate, and then an AlN buffer layer, an AlGaN stress modulation layer, an n-type GaN layer, an InGaN / GaN composite quantum well layer and a p-type conductive layer sequentially extend on the table surface of the silicon substrate to form a miniature light-emitting diode table surface; through stress release of the side wall of the mesa and stress modulation of the AlGaN layer, tensile stress distribution which is gradually reduced from the center of the mesa to the outer ring is formed in the n-type GaN layer, so that indium component distribution in the InGaN / GaN composite quantum well layer is regulated and controlled, and the micro light-emitting diode mesa covering three primary color wavebands of red, green and blue is formed. According to the chip structure disclosed by the invention, the red, green and blue three-primary-color sub-pixels are integrated, and the difficulty of a mass transfer process of the full-color micro light-emitting diode display chip is reduced. According to the invention, the preparation of the red, green and blue three-primary-color sub-pixels can be completed only by implementing an epitaxial process once, and the process flow is simplified.

The invention provides a light emitting diode with improved color purity and a preparation method thereof, and belongs to the technical field of photoelectron manufacturing. The light-emitting diode comprises a first semiconductor layer, a first light-emitting layer, a second light-emitting layer and a second semiconductor layer which are sequentially stacked, the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the ratio of the light-emitting intensity of the first light-emitting layer to the light-emitting intensity of the second light-emitting layer ranges from 2: 10 to 4.8: 10. According to the embodiment of the invention, the color gamut value of the light-emitting diode can be improved, the color purity of the light-emitting diode can be improved, and the light-emitting effect is improved.

The invention provides a display module, a preparation method thereof and electronic equipment, relates to the technical field of display, and aims to solve the problems of low imaging quality and the like of the display module. The display module comprises a driving substrate, a conductive grid, a transparent conductive layer and a plurality of miniature light-emitting diodes, the driving substrate comprises a plurality of first electrode contacts and a plurality of second electrode contacts, the miniature light-emitting diodes comprise first electrodes and second electrodes, and the miniature light-emitting diodes correspond to the first electrode contacts one to one. The first electrodes of the micro light-emitting diodes are electrically connected with the corresponding first electrode contacts; the conductive grid is electrically connected with the second electrode contact; the transparent conductive layer covers the plurality of micro light emitting diodes and the conductive grid, the second electrodes of the micro light emitting diodes are electrically connected with the conductive grid through the transparent conductive layer, and the resistivity of the material of the conductive grid is smaller than that of the material of the transparent conductive layer.

A display device may include a display panel including a plurality of pixels; and a data driver circuit configured to supply a data signal to the plurality of the pixels through data lines. A gate driver circuit, configured to supply a gate signal to the plurality of the pixels through gate lines, is disposed in the display panel. The display panel includes a driving layer including a gate area having the gate driver circuit; and a pixel circuit layer including an active area having a pixel area in which each of the plurality of pixels is disposed and a non-active area around the active area. The pixel circuit layer includes a light emitting diode, a clock line configured to supply a clock signal to the gate driver circuit, and a shielding pattern between the light emitting diode and the clock line.

The embodiments described herein relate to a device including a substrate, a plurality of adjacent pixel-defining layer (PDL) structures disposed on the substrate, and a plurality of subpixels. Each subpixel includes adjacent first overhangs, adjacent second overhangs, an anode, a hole-injection layer (HIL) material, additional organic light-emitting diode (OLED) material, and a cathode. Each first overhang is defined by a body structure disposed on a base structure disposed on the PDL structure and extending laterally past the base structure. Each second overhang is defined by a superstructure disposed on the body structure and extending laterally past the body structure. The HIL material is disposed on and in contact with the anode and disposed adjacent and below the first overhang. The additional OLED material is disposed on the HIL material and extends below the first overhang.

System and method for controlling one or more light emitting diodes. For example, the system includes: a voltage detector configured to receive a rectified voltage associated with a TRIAC dimmer and generated by a rectifying bridge and generate a first sensing signal representing the rectified voltage; a distortion detector configured to receive the first sensing signal, determine whether the rectified voltage is distorted or not based at least in part on the first sensing signal, and generate a distortion detection signal indicating whether the rectified voltage is distorted or not; and a phase detector configured to receive the first sensing signal and generate a phase detection signal indicating a detected phase range within which the TRIAC dimmer is in a conduction state based at least in part on the first sensing signal.

The invention discloses a single-line return-to-zero code LED drive control chip circuit which comprises a power management circuit, a start reset circuit, an oscillator circuit, a bias current circuit, a digital circuit and a light emitting diode drive circuit. The light emitting diode driving circuit comprises a driving channel of a white light emitting diode chip, a driving channel of a red light emitting diode chip, a driving channel of a green light emitting diode chip and a driving channel of a blue light emitting diode chip, and the power management circuit is used for ensuring that the power supply is turned off when all-zero data or no data is input by analyzing the states of the previous data and the next data in the power management signal. The single-line return-to-zero code LED driving control chip solves the problems that the current single-line return-to-zero code LED driving control chip with a three-channel design does not have a sleep mode, so that effective power consumption management is lacked when the brightness and the color of an LED are controlled, and the whole LED device still has static power consumption waste in a non-light-emitting state.

A light emitting diode (LED) pixel array and method of fabrication thereof. A semiconductor wafer template includes a successively stacked first n-GaN layer, first MQW layer, p-GaN layer, and dielectric layer. A plurality of apertures is formed through the dielectric layer, extending to the p-GaN layer. A plurality of mesas is formed by forming, within each aperture, a second MQW layer and a second n-GaN layer above each second MQW layer. The second n-GaN layer and second MQW layer of each mesa form a respective mesa LED with the p-GaN layer. The first n-GaN layer and first MQW layer form a lower LED with the p-GaN layer.

Data are optically transmitted from a power tool device, such as a power tool, a power tool battery charger, power tool pack adapter, and / or a battery pack. The data are stored in a memory of the power tool device and are encoded as optical signal data to provide an encoded representation of the stored data. An optical transmitter (e.g., a light emitting diode or a flat panel display) transmits the optical signal data, which are detected or otherwise received by an optical receiver device, which may include a camera or other photodetector. The optical signal data may include light signals generated by an LED, where the data are encoded using an encoding scheme that modulates one or more characteristics (e.g., amplitude, wavelength, color) of the generated light signals. The optical signal data may also include images (e.g., barcodes, QR codes) or characters.

A wearable device to measure a user's physiological parameters comprising one or more biosensors, as well as a light source comprising light emitting diodes, lenses for directing light towards tissue of the user comprising blood vessels, and a detection system receiving reflected tissue light. The physiological parameters, for example hypertension, are measured with a differential measurement. For example, the physiological parameters may be associated with pulse rate and blood flow. The output signal is associated with the physiological parameters, and artificial intelligence may be used in making decisions regarding the output signal. Signal-to-noise ratio of the output signal may be improved by synchronizing the detection system to the light source, increasing light intensity, and detecting a change. The wearable device is configured to determine that is being worn by the user and may be configured to communicate with a smartphone or tablet.

An example MR headset is provided. The example MR headset comprises (i) a set of imaging sensors and (ii) a set of floodlight-emitting diodes (flood LEDs), the sets of imaging sensors and flood LEDs disposed along a front-facing portion of the MR headset. The MR headset includes one or more processors configured to, while the MR headset is being caused to present MR content, and in accordance with a determination that imaging data obtained from the set of imaging sensors has an insufficient level of detail to identify hand gestures, cause illumination, using one or more flood LEDs of the set of flood LEDs, of a volume of physical space that includes the hand of the user.