7results about How to "High light conversion efficiency" patented technology

The present application relates to a kind of light conversion plate, Mini-LED display device and related preparation method, it is related to semiconductor display technical field.In the preparation method of the light conversion module for Mini-LED display device in the present application, by forming the first surface and the second surface of glass substrate first light conversion block, first light scattering block, second light conversion block and second light scattering block are alternately distributed, wherein the density of light conversion particle in the first light conversion block is greater than the density of light conversion particle in the second light conversion block, the density of light scattering particle in the second light scattering block is greater than the density of light scattering particle in the first light scattering block, by optimizing the structure of each light conversion block and each scattering block and the density relationship of light conversion particle, light scattering particle, light conversion efficiency and light uniformity are greatly improved.

This invention relates to a fluorescence down-conversion-based ultraviolet-enhanced CMOS image sensor and its fabrication method, belonging to the field of ultraviolet photoelectric detection technology. The image sensor comprises a CMOS image sensor and a down-conversion nanomaterial layer. The down-conversion nanomaterial layer is a benzene thin film deposited on the image-sensitive surface of the CMOS image sensor; the benzene thin film of the fluorescence down-conversion material layer has a thickness of 290 nm. This invention utilizes a low-cost fluorescence down-conversion material to achieve ultraviolet-to-visible light conversion. The emitted visible light can be well matched with the spectral response peak of the CMOS image sensor, improving the CMOS image sensor's response capability in the ultraviolet band. The down-conversion material in this invention possesses high light conversion efficiency, excellent thermal and light stability, and excellent transmittance in the visible and infrared regions. The thin film prepared by thermal evaporation exhibits better uniformity.

The present application provides a kind of benzotriazole derivatives and the resin composition containing the derivative.The benzotriazole derivative of the present application is 1H substitution type, compared with the traditional 2H substitution type benzotriazole derivative photoconversion material compound, the 1H substitution benzotriazole compound of the present application can significantly improve the light conversion efficiency of solar cell, especially the light conversion efficiency of solar cell with TOPCon photovoltaic module.

The application relates to the technical field of semiconductor lighting, in particular to a full-spectrum high-color-rendering LED lamp bead. The lamp bead comprises an LED support, a blue light excitation chip, a red light enhancement chip, a multi-component fluorescent material system, a silicone encapsulation lens and a heat management structure. The blue light excitation chip and the red light enhancement chip are die-bonded on the LED support and form electrical connections with the positive and negative electrode pads respectively; the multi-component fluorescent material system is formed on the chip surface by adopting a partition coating process; the heat management structure comprises a high-thermal-conductivity ceramic substrate and a silver-plated copper alloy support frame. The application realizes full-spectrum coverage through the blue light excitation chip combined with the multi-component fluorescent material system, and simultaneously configures the red light enhancement chip to supplement the red light band energy, adopts an optimized partition coating process and a multi-layer fluorescent structure design, effectively controls the proportion of blue light overflow, and improves the light conversion efficiency. The lamp bead can significantly improve the general color rendering index Ra and the special color rendering index R9, realizes low blue light hazard, high luminous efficiency and good thermal stability.

The invention relates to a method and a device for generating an integrated start key single soliton microcavity optical frequency comb based on a double-loop coupling system. Comprising a monolithic integrated III-V group pumping laser chip, a silicon-based CMOS process integrated double-coupling optical microcavity chip, a temperature control unit, a driving control unit, a light beam splitter, a detection unit, a photoelectric detector and a feedback control unit. According to the scheme, blue detuning of the single soliton microcavity optical frequency comb is realized through double-coupling microcavity tuning local dispersion. The invention provides a technical scheme of an integrated start key single soliton microcavity optical frequency comb. The problems of thermal instability, dependence on a high-quality factor micro-ring resonant cavity and relatively low output power of the single soliton micro-cavity optical frequency comb due to the fact that pump laser needs to be locked in micro-cavity red detuning when the single soliton micro-cavity optical frequency comb is generated in a single-cavity system are solved, and the system stability and reliability of the single soliton micro-cavity optical frequency comb are improved. According to the scheme, a feasible path is provided for engineering application of the microcavity optical frequency comb in the fields of communication, sensing and the like.

The application relates to the technical field of LED display, and discloses a micro light-emitting diode display device. The micro light-emitting diode display device comprises a driving backboard, a plurality of LED units, a wavelength conversion layer and a light filtering layer. The plurality of LED units are arranged on the driving backboard. The LED units emit mixed color light, and the mixed color light comprises first color light and second color light. The wavelength conversion layer is arranged on part of the LED units and is used for converting the mixed color light emitted by the corresponding LED units into third color light. The light filtering layer comprises first light filtering units and second light filtering units. At least three adjacent LED units form a full-color pixel point, wherein the wavelength conversion layer is arranged on one LED unit, the first light filtering unit is arranged on one LED unit, and the second light filtering unit is arranged on one LED unit. The application realizes efficient monolithic full-color display, improves light conversion efficiency, reduces process complexity, and realizes higher yield.

According to an aspect of the present disclosure, a display device includes: a first substrate; a planarization layer disposed on the first substrate and including a first top surface, a second top surface lower than the first top surface, and an inclined surface; a first reflective electrode at least partially disposed on the inclined surface of the planarization layer; a light emitting element on the first reflective electrode; and a second reflective electrode provided to cover the light emitting element. The light emitting element is disposed on any one of the first top surface and the second top surface. Accordingly, the first reflective electrode is provided on the inclined surface to more easily extract light emitted from the light emitting element to the outside.