31results about How to "Ensure uniformity of light emission" patented technology

The invention provides an LED (Light Emitting Diode) lamp filament and a manufacturing method thereof. An LED chip is encapsulated on the edge top surface of a thin and long sheet metal support of the LED filament innovatively, meanwhile the sheet metal is inserted into a preformed transparent plastic model frame to produce a light source, and accordingly the automated continuous production of the LED lamp filament is implemented and the problem of the facing direction strength caused by the too thin and too long metal support is solved due to the transparent plastic model frame; meanwhile the lateral direction strength of the metal support is effectively utilized and accordingly the integral mechanical strength of the LED lamp filament is ensured; the heat dissipation characteristics of the metal is directly utilized, meanwhile the heat dissipation efficiency of the LED chip is maximized through the innovative encapsulation of thermal conductive coatings, and accordingly the problem of a heat dissipation bottleneck of the LED lamp filament is effectively solved, the LED lamp filament can work at the rated power for a long time, and the cost is reduced; the LED light extraction efficiency is improved, the light attenuation is reduced, the high lighting effect and ambient light of lamp filament light emission is implemented, and the market vacancy of the existing LED lamp filament is filled through innovative fluorescence encapsulation materials.

Embodiments of the invention provide a substrate, a preparation method of the substrate and a display device, relate to the technical field of display, and can solve the problem that the thickness ofa light-emitting functional layer formed in an opening region of an existing pixel definition layer is not uniform. The preparation method of the substrate comprises the following steps of forming a pixel definition layer thin film on a substrate, wherein the material of the pixel definition layer thin film comprises a photoresist, and a hydrophilic material, elastic materials and auxiliary particles doped in the photoresist; the auxiliary particles are used for releasing gas during decomposition, and the elastic material is used for expanding the pixel definition layer thin film when the auxiliary particles release the gas; the molecular weight of the hydrophilic material, the photoresist and the elastic material is larger than that of the auxiliary particles; heating the pixel definitionlayer thin film, and enabling the auxiliary particles to move in the direction far away from the substrate; and processing the pixel definition layer thin film to form a pixel definition layer, and enabling the auxiliary particles to be decomposed to release gas. The preparation method is used for preparing the pixel definition layer.

The invention provides a backlight module and a display device. The display device comprises a backlight module and a display panel. The backlight module comprises a backplane, a light guide plate and a light source, wherein the backplane comprises a plurality of backplane bulges and corresponding backplane pits thereof, the light guide plate comprises a plurality of pits, the backplane bulges of the backplane are embedded into the pits of the light guide plate, and the light source is arranged on at least one side of the light guide plate. According to the invention, the heat dissipation effect can be improved by using the backplane pits of the backplane.

The invention provides a light-focusing module and a backlight module using the light-focusing module. The light-focusing module comprises a light emitting face and a plurality of light-focusing microstructures; the light emitting face has a geometric center; the light of each light-focusing microstructure has the maximum emitting brightness in certain direction; when the inclined angle between the light emitting direction and the certain direction is a brilliance semi-range angle, the brightness decreases to half the maximum emitting brightness; the light-focusing microstructures change gradually from the geometric center of the light emitting face towards the direction far away from the geometric center, the farer from the geometric center of the light emitting face, the larger the brilliance semi-range angle of the light-focusing microstructures. A liquid crystal display using the light-focusing module and the backlight module seems to have more uniform brightness.

The invention discloses an AC (alternating current) high-voltage double-side LED lamp bar. The AC high-voltage double-side lamp bar comprises an elongated bar-shaped transparent cover, protecting caps and an LED lamp bar body, wherein the protecting caps are fixed at two ends of the transparent cover, and the LED lamp bar body is fixed in the transparent cover. The LED lamp bar body comprises an FR-4 epoxy resin circuit board and LED lamps, wherein the FR-4 epoxy resin circuit board is provided with an alternating-current and direct-current conversion circuit, and the LED lamps are arranged on the front side and the back side of the FR-4 epoxy resin circuit boards. Meanwhile, waterproof heat-conduction silica gel is filled in the protecting caps. The AC high-voltage double-side LED lamp bar is skillful in design, simple in structure, convenient to realize and low in cost, is remarkably higher in comprehensive performance as compared with the prior art, and has good market prospect.

The invention discloses a display panel. The display panel comprises a plurality of sub-pixels, each sub-pixel comprises a driving circuit, and each driving circuit comprises a light-emitting device, a driving transistor, a first transistor, a first capacitor, a second transistor and a third transistor. A drain electrode of a first transistor is electrically connected with a grid electrode of a driving transistor, a source electrode of a third transistor is electrically connected with a source electrode of the first transistor, the first transistor is an oxide thin film transistor, and after the first transistor is closed, a light-emitting device is turned on to emit light. And after the first transistor is closed, the low leakage characteristic of the oxide thin film transistor is utilized to suppress the grid potential change of the driving transistor within one frame time, the potential stability of the grid of the driving transistor is improved, and the light emitting uniformity of the light emitting device is further ensured, so that leakage is controlled through the oxide thin film transistor, and high-quality display is realized. And low frequency and low power consumption are achieved.

The invention relates to a method and device of smearing fluorescence powder to screw type fluorescence lamp, it adopts the device with function of rotation and revolution to make the fluorescence powder slurry layer smeared evenly and solidified slowly in screw bent glass pipe, and the normal temperature air is as the moisture absorption agent, and combining the infrared radiation, firing in oven and desiccation of flowed circled air, technics of reinforcing coat, the fluorescence powder layer is insured not to be thick, and the thickness is even, it fits for insuring the quality of screw type fluorescence lamp, and can increase at least 3% or above of the luminescence efficiency, save 10% or above of fluorescence powder, and the device can set many screw bent glass pipe mounting rack, it can move slowly, work as sequence, operate circularly, the work efficiency can be increased greatly, and without technics that it adopts the definite 90deg.C hot air desiccant which is used in current technique, the production cost is decreased, it possesses advantages of reliability, convenient to use, evident saving energy, and possesses marked economy and strong practicability.

The invention discloses an LED advertisement light box side lighting light bar based on the 220V alternating current, and belongs to the technical field of electronics. The LED advertisement light box side lighting light bar based on the 220V alternating current comprises a light bar outer shell and LED light beads (4), wherein the light bar outer shell is composed of an anti-flaming PC clamping groove (1) and a PC lampshade (3) arranged at the top of the anti-flaming PC clamping groove (1); a circuit board is embedded into the anti-flaming PC clamping groove (1); the LED light beads (4) are fixed to the light bar outer shell; a rectifier (5) and an LED working circuit connected with the rectifier are integrated on the circuit board. By means of the structure, the LED advertisement light box side lighting light bar based on the 220V alternating current solves the problems that as an existing light bar can be connected with the electric supply by being provided with a direct current power source independently or being matched with an adapter, installation is inconvenient and cost is high, and has higher practical value.

The invention discloses a direct type backlight module comprising a perforated layer. The backlight module comprises a lower shell, a direct type light source, a reflecting cover, the perforated layer, a light scattering assembly and an upper frame. The direct type light source is fixed in the lower shell; the reflecting cover is arranged on the direct type light source; the perforated layer and the light scattering assembly are sequentially stacked on the reflecting cover; and the reflecting cover, the perforated layer and the light scattering assembly are pressed and fixed in the lower shellthrough the upper frame. A plurality of LED light sources are arranged on the direct type light source; a plurality of reflection cups are arranged on the reflecting cover; a plurality of perforationunits are arranged on the perforated layer; a plurality of perforations are formed in each perforation unit; each LED light source is arranged on the bottom of one corresponding reflection cup; and each perforation unit is arranged right above the corresponding reflection cup. The method is used for optimizing light emitting uniformity of the backlight module.

The invention discloses a luminous uniformity correction device, which is suitable for correcting the luminous uniformity of a light emitting module of an exposure machine. The light intensity signals are generated by the sensing module at each sampling position corresponding to the distribution of the light emitting module, and the processing module analyzes the light emitting uniformity of the light emitting module according to these light intensity signals, and when the light emitting uniformity of the light emitting module does not meet the A corresponding calibration signal is generated when a uniformity standard is used, and the adjustment module correspondingly adjusts the luminous intensity of at least one of the light emitting units of the light emitting module according to the calibration signal. Therefore, by using automatic equipment to correct the uniformity of the light emitting module, it is possible to quickly and conveniently adjust the areas with abnormal light intensity to ensure uniformity of light emission, thereby improving the manufacturing yield of the circuit board.

The invention is applicable to the technical field of light bars, and provides an integrated LED light bar. The integrated LED light bar comprises a base material mechanism for mounting light-emittingmechanisms, arranging a power line, and radiating the light-emitting mechanisms; and the light-emitting mechanisms which are embedded in the base material mechanism and are used for realizing the superposition of light-emitting angles through the combination of multiple groups of light-emitting mechanisms to form the comprehensive and uniform light emission. In the present invention, when the light emitting mechanisms operate, the reasonability of the light-emitting angle is realized through the structural design, the light source angle is utilized to the maximum extent, and the light emitting uniformity is ensured, so that the light emitting mechanisms can be efficiently used while the light emitting mechanisms are most economical, the heat generated during the operation of the light emitting mechanisms is automatically and quickly guided out and dissipated through the cooperation of the base material mechanism and the light emitting mechanisms, and the service life of the whole integrated LED light bar is prolonged.

The invention relates to the technical field of display, in particular to a graphical flexible electrode, a preparation method and a flexible display device. The flexible electrode comprises a graphical line, wherein the graphical line comprises a metal electrode material and further comprises fiber and micro-metallic particle; long-chain polymer is connected with the surface of the micro-metallicparticle; organic molecule is covered on the surface of the fiber; the organic molecule is connected with the long-chain polymer through a hydrogen bond; the fiber wraps the micro-metallic particle.The graphical flexible electrode has dynamic self-repairing capability, can dynamically repair bending fatigue damage during disconnection, rapidly recover path and eliminate display defect after being applied to the flexible display device, guarantees the uniformity of luminance, and improves the deflection resistance capacity and increases the service life of a product.

The invention discloses a side-entry backlight module with a light and thin structure. The backlight module comprises a lower shell (1), a lamp shade (2), a lamp strip (3), a light guide plate (4) anda diaphragm structure (5). The lamp strip (3) is arranged in the lamp shade (2); the lamp shade (2) is fixedly arranged on the lower shell (1); the light guide plate (4) and the diaphragm structure (5) fixedly arranged in the lower shell (1); the lower shell (1) is a plastic component, and the bottom portion of the lower shell (1) is of a hollow structure; the lamp shade (2) is a metal piece; thelight guide plate (4) is of a wedge structure; the lamp strip (3) enters light from the thicker side of the light guide plate (4); and a mesh point structure is arranged on the light guide plate (4),and mesh points on the light guide plate realize gradual transition from thin to dense from the thicker side to the thinner side. The weight of the backlight module is reduced, and size of the backlight module is thinned.

The invention relates to the technical field of LED integrated light sources, and discloses an LED integrated light source manufacturing process and an LED integrated light source. The manufacturing process of the LED integrated light source comprises the following steps: S10, adhering a plurality of chips into counter bores of a substrate through an adhesive, and baking to form a chip layer; S20,conducting the plurality of chips, and reserving lead layers conducted with the chips; S30, placing an edge shielding frame, mixed fluorescent powder, fluorescent glue and a diluent on the peripheryof the chip layer, spray-covering the chip layer, taking down the edge shielding frame, baking to form a fluorescent layer, and placing the chip layer in the fluorescent layer; and S40, dispensing a packaging adhesive on the fluorescent layer, baking to form a packaging layer, and placing the chip layer in the packaging layer. According to the invention, by adding the diluent, the viscosity of thepowder glue mixed solution is reduced, the content of fluorescent powder is increased, and the brightness of light generated after excitation is ensured to be higher; and the spraying mode enables the excitation efficiency of each position of the chip to be the same, guarantees the light-emitting uniformity, reduces the risk of glue cracking, and prolongs the service life of the LED integrated light source.