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81results about How to "Improve glow quality" patented technology

OLED (organic light emitting diode) pixel limit structure and manufacturing method thereof

The invention relates to the field of display, in particular to an OLED (organic light emitting diode) pixel limit structure and a manufacturing method thereof. The invention aims to solve the problems that during the manufacturing of a pixel definition layer, as the pixel definition size is smaller, and liquid drops need to be precisely controlled to fall to the pixel limit area, the equipment investment is increased, the higher cost is caused, and the pixel limit area is difficult in forming a film with uniform thickness. The pixel definition layer in the embodiment of the invention includes sub pixel limit areas of different colors, and at least two sub pixel limit areas with the same color are communicated with each other; at least two sub pixel limit areas with the same color of the pixel definition layer are communicated with each other, so liquid drops fall to the communicated sub pixel limit areas to enable the communicated sub pixel limit areas to be filled with liquid due to the liquidity of the liquid; at least two sub pixel limit areas are communicated, so that the liquidity of the liquid is increased, and the film with uniform thickness can be formed in the sub pixel areas more easily; and accordingly, the lighting quality of a back panel is improved.
Owner:BOE TECH GRP CO LTD

LED light fitting and light engine thereof

The invention relates to an LED light fitting and a light engine thereof; the LED light fitting comprises an optical part, an electrical part and a heat dissipation part, wherein the optical part comprises an LED light source and a light-emitting channel; the electrical part comprises a protecting cover and a circuit board; the heat dissipation part comprises a radiator and at least one heat pipe which are arranged between the protecting cover and the optical part; the radiator comprises a ring-shaped radiating base, a plurality of fins which are distributed on the outer surface of the radiating base in a radial way, and a heat absorbing plate positioned on the radiating base close to one end of the optical part; the radiating base is internally provided with a cavity body provided with an opening towards one end of the protecting cover; the LED light source is in thermal contact with the outer surface of the heat absorbing plate facing the optical part; and the heat pipe is arranged inside the cavity body of the radiating base and comprises an evaporation section and a condensation section, wherein the evaporation section is in thermal contact with the inner surface of the heat absorbing plate facing the electrical part, and the condensation section is in thermal contact with the inner surface of the radiating base.
Owner:FU ZHUN PRECISION IND SHENZHEN +1

Induction type wireless energy transmission light emitting diode (LED) drive circuit

The invention discloses an induction type wireless energy transmission light emitting diode (LED) drive circuit, which comprises a power factor correction circuit, an inverter circuit, a loosely coupled transformer, a rectifier circuit and an LED light source; wherein the output end of the power factor correction circuit is connected with the input end of the inverter circuit, the output end of the inverter circuit is connected with the primary side of the loosely coupled transformer, the secondary side of the loosely coupled transformer is connected with the alternating current input end of the rectifier circuit, the direct current output end of the rectifier circuit is connected with the power supply terminal of the LED light source. Compared with the prior art, the drive circuit disclosed by the invention has the advantages that wireless energy transmission LED drive circuit is realized by using a loosely coupled transformer; the interaction of the heat dissipation of the drive circuit and the heat dissipation of the LED light source is avoided; the voltage of the switching device and the current stress are decreased by a resonant circuit; the luminous efficiency, the quality of light, and the service life of the LED light source are improved by the drive circuit; the high efficiency and high reliability of the LED driver is guaranteed.
Owner:SOUTHEAST UNIV

Organic light emitting display device, preparing method thereof, and display apparatus

The invention discloses an organic light emitting display device, a preparing method thereof and a display apparatus. The organic light emitting display device comprises the components of a substrate; a first electrode which is arranged on the substrate; a light emitting layer arranged on one side, which is far from the substrate, of the first electrode; a second electrode arranged on one side, which is far from the first electrode, of the light emitting layer; and a polarization reflecting layer arranged on one side, which is far from the light emitting layer, of the first electrode, or one side, which is far from the light emitting layer, of the second electrode. Therefore, the organic light emitting display device, the preparing method thereof and the display apparatus have advantages of improving electrode reflectivity of the organic light emitting display device, improving brightness and stability of the device, improving polarization characteristic of light which is output from the device, and improving light emitting quality of the device.
Owner:BOE TECH GRP CO LTD +1

Silicon-based group III-V nanotubes and micro-tubes as well as preparation method thereof

The invention discloses silicon-based group III-V nanotubes and micro-tubes as well as a preparation method thereof. The nanotubes and the micro-tubes are of cylindrical hollow tubular structures with non-closed ends, which are formed by self-crimping of epitaxially grown group III-V strain semiconductor films on a single crystal Si substrate, the diameters of the nanotubes and the micro-tubes are 1 nm to 100 microns, and the lengths of the nanotubes and the micro-tubes are 1 micron to 1 mm. The tubular structures have great application value in the fields of silicon-based photonics, micro-machine systems and sensing. The invention integrates mutated epitaxial growth from bottom to top with a photoetching corrosion technology from top to bottom. Through lateral corrosion of group III-V sacrificial layers, the group III-V strain dual-layer films are released from Si and are crimped to tubes. The method is compatible with a process of group III-V photoelectron and micro-electronics devices and has the advantages of simple tube production process, good tube appearance, controllable tube size and the like, and furthermore, a large area of group III-V nanotube or micro-tube arrays with consistent rule are easily formed on the Si.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Backlight device and display device using same

A backlight device (3) is provided with a substrate (9) whereupon a plurality of light emitting diodes (10) are arranged, and a lower side chassis (heat dissipating section) (6) where heat generated in the light emitting diodes (10) is transferred from the substrate (9) and dissipated to the external. A heating value of each light emitting diode (10) is previously measured, and based on the measurement results of the heating values, an arrangement position on the substrate (9) is determined and corresponding light emitting diodes (10) are arranged.
Owner:SHARP KK

Preparation method of remote fluorescent film for high-power LED

The invention provides a preparation method of a remote fluorescent film for a high-power light-emitting diode (LED). The preparation method comprises the following steps: first, preparing low-melting-point glass powder by a melting method, dispersing the glass powder and fluorescent powder in an organic solvent, and uniformly mixing them into a fluorescent glass slurry; and coating the fluorescent glass slurry on a frosted glass substrate by a spin coating/screen printing technology to form a uniform fluorescent film layer, drying the uniform fluorescent film layer in a vacuum oven, then sintering the uniform fluorescent film layer at low temperature, and cooling the uniform fluorescent film layer along with a furnace to obtain the fluorescent film. The fluorescent film prepared by the method is simple in preparation process and good in chemical and optical properties; in addition, a glass substrate with a frosted surface can reduce specular reflection and minimize total internal reflection so as to increase the efficiency of white light output; therefore, compared with a flat glass plate, the fluorescent film with a frosted glass substrate is increased in efficiency under the excitation of an LED blue light chip, and the preparation method is easy to control and realize white light output, so that the fluorescent film can be applied to the field of semiconductor lighting.
Owner:SHANGHAI INST OF TECH

Orange light thermally activated delayed fluorescence material as well as synthesis method and application thereof

The invention discloses an orange light thermally activated delayed fluorescence material as well as a synthesis method and application thereof, and belongs to the technical field of organic photoelectric materials and devices. The orange light thermally activated delayed fluorescence material is DV-Cz-DCPP and is a thermal crosslinking type TADF molecule, use of a metal catalyst can be avoided inthe polymerization process, further purification treatment is not needed, and the polymer synthesis and purification process is simplified. In the application, a redissolution process of the polymercan be avoided through an in-situ polymerization method, a polymer synthesis process and a light-emitting layer film manufacturing process are combined into one, and the device manufacturing process is simplified; and the proportion of the host-guest content can be accurately controlled, so that the stability and the light-emitting quality of the white light device can be improved. The polymer film subjected to in-situ crosslinking by applying the DV-Cz-DCPP has the characteristics of good film-forming property, good stability, strong solvent corrosion resistance and the like, is convenient for further spin coating of an electron transport material, provides guarantee for a full-wet device, improves the utilization rate of the material, reduces the cost and improves the productivity.
Owner:YANCHENG INST OF TECH

Display device and preparation method thereof

The embodiment of the invention provides a display device. The display device comprises a substrate, a planarized layer covering the substrate and a protective layer covering one side, deviating fromthe substrate, of the planarized layer; and the protective layer has thermal conductivity, transparency and insulativity. According to the embodiment of the invention, the protective layer with the thermal conductivity, transparency and insulativity covers the planarized layer, the planarized layer can be effectively protected, the planarized layer is prevented from deforming in a follow-up preparation process, loss of blue light in white light of the planarized layer is reduced, color temperature is increased, the white light is improved, and light emitting quality of the display device is improved.
Owner:BOE TECH GRP CO LTD +1

Organic electroluminescent device capable of prolonging suse life

InactiveCN1825659AExtended service lifeDisadvantages of blocking access to the inside of the coverElectroluminescent light sourcesSolid-state devicesOrganic electroluminescenceEngineering
The invention relates to an organic electroluminescence device, especially an organic electroluminescence device able to prolong service life of pixels in luminous region, mainly provided with a pseudo region between isolation wall / pixel defining layer and sealing gum layer of a cover plate so as to be able to assure the isolation wall or pixel defining layer in the sealing gum layer to prevent water and damp from entering in the cover plate, thus able to effectively prohibit the reduction of luminous area in the luminous region to prolong the service life and luminous quality of pixels in the luminous region.
Owner:OPTO TECH

Luminous unit and fluorescent lamp tube group thereof

The invention relates to a luminescent element and a group of fluorescence lamps. The group of fluorescence lamps wherein comprises a first fluorescence lamp and a second fluorescence lamp. The first fluorescence lamp is provided with a first conductor and a second conductor, which are respectively arranged on the two ends of the first fluorescence lamp; the second fluorescence lamp is provided with a third conductor and a fourth conductor, which are respectively arranged on the two ends of the second fluorescence lamp. The second conductor of the first fluorescence lamp is electrically connected with the third conductor of the second fluorescence lamp. The second fluorescence lamp is approximately arranged along a long axial direction of the first fluorescence lamp. The invention also discloses a luminescent element which is provided with a group of fluorescence lamps. The luminescent element comprises a back board and a group of fluorescence lamps. The invention can solve the problem that granules of fluorescence powders are unevenly distributed when only one fluorescence lamp is used, improves evenness of fluorescence powders on the internal walls of the fluorescence lamps, decreases color difference of the integer light source of the luminescent element and improves light quality of the luminescent element.
Owner:GIGNO TECH CO LTD
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