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167results about How to "Reduce shadowing effect" patented technology

Organic light-emitting display panel and display apparatus

The invention discloses an organic light-emitting display panel and a display apparatus. The organic light-emitting display panel comprises a display area and a non-display area, wherein the display area comprises a substrate, a driving circuit layer and an light-emitting device layer disposed on the driving circuit layer; and the non-display area comprises a retaining wall arranged to encircle the display area, the retaining wall comprises at least one support layer, a barrier layer disposed on the support layer and multiple projections formed on the barrier layer, and the multiple projections are successively arranged along a direction away from the display area. The organic light-emitting display panel further comprises a packaging layer which covers the display area and the surfaces of a part of the projections. According to the invention, through designing the multiple projections at the top end of the retaining wall, the edge of the packaging layer can be sealed only by use of one retaining wall, the frame width of the display panel is reduced, the multiple projections generate deformation to make up for slits when being extruded by a mask, through the multiple projections, diffusion paths of reaction gas during deposition are also increased, diffusion can be ended in the multiple projections, and a shadow effect is eliminated.
Owner:SHANGHAI TIANMA MICRO ELECTRONICS CO LTD

Wafer-level aca flip chip package using double-layered aca/nca

A method of manufacturing a wafer-level flip chip package is capable of being used to produce a flip chip package by directly coating a flip chip package using anisotropic conductive adhesives (ACA) and non conductive adhesives (NCA) in a solution state as a double layer on a wafer. The method can be used to manufacture a non-conductive mixed solution and a conductive mixed solution and directly coat them on a substrate, such that it is possible to: increase productivity; simplify a manufacturing process; suppress a shadow effect; easily perform thickness control that is difficult with the anisotropic conductive adhesive paste or the non-conductive adhesive paste; and obtain the non-conductive layer and the anisotropic conductive layer in an initial state of a B-stage with a level not losing latent of hardening through a simple drying process to volatilize an organic solvent. Above all, the non-conductive layer and the anisotropic conductive layer is sequentially stacked on the substrate formed with the non-solder bump, making it possible to make the selectivity of electrical conduction and the stability of a connection process excellent, shorten process time and costs, and dramatically reduce consumption of the conductive particles which account for a large portion of total production costs.
Owner:KOREA ADVANCED INST OF SCI & TECH

Mask plate and encapsulating method for OLED device

The invention provides a mask plate and an encapsulating method for an OLED device. According to the mask plate provided by the invention, a plurality of rectangular shielding parts are uniformly arranged on four sides of a rectangular opening of a frame body; when the mask plate is utilized to encapsulate the OLED device, three independent sides of the rectangular shielding parts generate shadow effects, so that film thickness of a passivation layer formed below the rectangular shielding parts is the same as that of a passivation layer formed below a residual un-shielded area in the rectangular opening; moreover, positions on which the rectangular shielding parts are connected with the sides of the rectangular opening do not generate shadow effects, and the shadow effect generated by a bottom side of a first groove between adjacent two rectangular shielding parts is diffused towards the positions on which the adjacent rectangular shielding parts are connected with the sides of the rectangular opening for being diluted and reduced, so that the shadow effects of the side integers of the rectangular opening is reduced, and an actual film-forming area of the passivation layer is almost the same as a preset designed film-forming layer, and therefore, a narrow side frame design can be realized, encapsulating effect is improved, and the service life of the device is prolonged.
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

Method for reducing interference of ground and isolation belt on automobile millimeter wave radar

The invention relates to a method for reducing the interference of the ground and an isolation belt on an automobile millimeter wave radar. The method includes the following steps that: step 1, transmission signals are emitted, and return signals are generated when the transmission signals meet an object; step 2, the return signals are received; step 3, frequency mixing is performed on the returnsignals and local oscillation signals, so that intermediate-frequency signals can be outputted; step 4, distance fast Fourier transformation and Doppler fast Fourier transformation are separately performed on the intermediate-frequency signals; step 5, the distance-Doppler two-dimensional spectrum of the intermediate-frequency signals is obtained; step 6, distance dimension information and speed dimension information at a target position are extracted from the distance-Doppler two-dimensional spectrum, and the distance dimension information is subjected to constant false alarm processing by using a sorting method; step 7, a unit average method is adopted to perform constant false alarm processing on the speed dimension information which has been subjected to sorting method-based constant false alarm processing, so that the detection threshold value of the target position can be obtained; step 8, a final detection threshold value is obtained according to a set false alarm probability; step 9, the peak values of the target position are compared with the final detection threshold value; and step 10, whether a target object exists in the target position is judged.
Owner:米传科技(上海)有限公司

Casting mold for producing high-temperature alloy single crystal blades and directional solidification device thereof

The invention provides a casting mold for producing high-temperature alloy single crystal blades. The casting mold is applied to a directional solidification device. The casting mold is in a cylindrical shape and comprises an inner-layer ceramic shell and an outer filling interlayer, wherein an inner cavity formed by the ceramic shell is used for pouring high temperature alloy melts to form high-temperature alloy castings, and the periphery of the ceramic shell is filled with heat conduction materials and thermal insulation materials alternately through a barrel-shaped hoarding to form a filling entity provided with a plurality of horizontal heat conduction layers and thermal insulation layers through bonding. According to the entity heat conduction casting mold process, pouring and directional solidification can be performed in the existing directional solidification furnace, all sides of blades can be evenly heated, and therefore the severe shadow effect and organizational defects caused by the shadow effect can be eliminated effectively; and the condition that cold and hot areas in the existing device are almost through is changed, closed isolation between hot areas and cold areas is achieved, reduction of heat losses is facilitated, temperature gradients in castings is increased greatly, and the optimal temperature condition for growth of single crystals is formed.
Owner:DONGFANG TURBINE CO LTD

Thin-film AlGaInP light-emitting diode chip and its preparation method

PendingCN108198926AWith light reflectionFunctionalSemiconductor devicesOhmic contactQuantum well
The invention discloses a thin-film AlGaInP light-emitting diode chip and its preparation method. The light-emitting diode chip comprises a bonding substrate with positive and negative faces. From thefront surface of the bonding substrate upwards, it is sequentially provided with: a substrate side metal bonding layer, an epitaxial side metal bonding layer, a P surface diffusion barrier metal layer and a P surface reflection ohm contact layer; from the P surface reflection ohm contact layer to the top, it is sequentially provided with P-type current spreading layer, the P-type limiting layer,the P-side spatial layer, the multi-quantum well light-emitting region, the N-side spatial layer, the N-type limitation layer, the N-type coarse layer, the N-type ohm contact layer and the N electrode; and the reverse side of the bonding substrate is a P electrode. The P-plane reflecting ohm contact layer adopted by the invention has the functions of light reflection and ohm contact; by optimizingthe spacing distance of the block and the width of the N electrode through the blocking of the P-plane reflection ohm contact layer, the current injection concentration problem of the N-electrode corresponding region can be suppressed, and the N electrode shielding effect can be effectively reduced. The invention has the advantages of effectively improving the photoelectric conversion efficiency,simple structure and the like.
Owner:NANCHANG UNIV +1

Simple dual-frequency dual-circularly-polarized parabolic reflector antenna feed source

ActiveCN102610927AGood polarization isolationGood frequency band isolationSimultaneous aerial operationsRadiating elements structural formsDual frequencyCircular disc
The invention discloses a simple dual-frequency dual-circularly-polarized parabolic reflector antenna feed source, which comprises a circular radiation patch which is fed by eight L-shaped probes. The simple dual-frequency dual-circularly-polarized parabolic reflector antenna feed source is characterized in that the eight L-shaped probes are equiangularly distributed around the circumference, the feed probes of frequency 1 and the feed probes of frequency 2 are distributed in a staggered way, wherein the distances of four of the feed probes from the centerlines of the vertical parts to the center of the radiation disc are changeable with frequency, i.e. when the frequency is high, the centerlines of the vertical parts of the probes are close to the center of the radiation disc and the radiation area is correspondingly reduced, and when the frequency is low, the centerlines are far away from the center of the radiation disc and the radiation area is correspondingly increased; and therefore approximately consistent directional diagrams are obtained within frequency bands, the two frequency bands have approximately consistent phase centers and wider working frequency bands are obtained within the two frequency bands. The feed source can work in a dual-circularly-polarized way within the two frequency bands at the same etime, the cross section is small, the structure is simple, the cost is low, the parabolic reflector antenna can be enabled to have high antenna efficiency and low side-lobe level within the two frequency bands and the two frequency bands can be enabled to have the advantages of better frequency band isolation performance, good polarization isolation performance and the like.
Owner:XINGDONG COMM TECH SUZHOU +1

Ring illuminator and fusion recognition method utilizing ring illuminator illumination based on shape, grain and weight of tool

ActiveCN103413141AReduce shadowing effectAccurately obtain texture informationCharacter and pattern recognitionPoint lightLight beam
The invention discloses a ring illuminator and a fusion recognition method utilizing ring illuminator illumination based on the shape, the grain and the weight of a tool. The ring illuminator and the fusion recognition method utilizing the ring illuminator illumination based on the shape, the grain and the weight of the tool are used for solving the technical problem that an existing ring illuminator cannot accurately obtain all the grain information of the tool. According to the technical scheme, the ring illuminator is composed of a main light source and a back light source, the main light source is composed of four concentric circle light emitting bands which are fixed to a base plate and are formed by LED point light sources, the light emitting bands are composed of LEDs with equal distances, and rotation invariance is maintained for the shot tool grain. The back light source is composed of a supporting plate a diffuse reflection plate, a box body, light sources and a reflecting layer. The box body is made of PVC plates, the reflecting layer is a reflecting film, the reflecting film is evenly attached to the inner surface of the box body, the LEDs are evenly arranged on the lower bottom plate of the box body at intervals to form the light sources, the diffuse reflection plate is arranged above the light sources and below the supporting plate, scattering light beams which are low in luminance and good in uniformity are generated, the shadow effect of the tool under natural light is eliminated, and all the grain information of the tool is obtained.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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