36results about How to "Reduce bad ratio" patented technology

The invention discloses a method for pressing a flexible circuit board, which adopts a stacking structure to press the raw material of the flexible circuit board. The pressing method includes a pressing step A and a pressing step B. Using the two step pressing method of the invention can obviously reduce the glue-overflowed amount, lower the ratio of harmful bubbles increase the raising peeling strength and improve the performance of the flexible circuit board.

The invention discloses a rinsing fluid used for removing organics on the surface of a monocrystalline silicon piece and a cleaning method. The rinsing liquid comprises the following compositions in parts by volume: 2.30 parts-4.5 parts of hydrogen peroxide, 0.20 parts-1.15 parts of potassium hydroxide, and 94.35 parts-97.5 parts of pure water, wherein the mass fraction of potassium hydroxide is 45% and pure water is 18 M pure water. The cleaning method comprises the following steps: (1) flushing with tap water; (2) immersing in a lactic acid solution; (3) rinsing with tap water; (4) using pure water for ultrasonic pre-cleaning; (5) using a cleaning liquid for ultrasonic cleaning; (6) using pure water for ultrasonic rinsing; (7) using the rinsing fluid for rinsing; (8) using pure water for rinsing; and (9) performing dip coating and baking. The rinsing fluid and the cleaning are capable of effectively removing organics left on the surface of the monocrystalline silicon piece, improving the clean degree of the monocrystalline silicon piece surface, effectively reducing the cleaning unqualified rate of the monocrystalline silicon piece and the adverse ratio of the monocrystalline silicon piece subjected to etching, improving the quality of the monocrystalline silicon piece and enhancing the market competiveness of the product.

The invention discloses an RGB point-control intelligent beauty lamp. A beauty lamp string is connected in series with the positive and negative poles of a main line, and is composed of a plurality ofdiodes. The addresses of the diodes are set by an encoder. One end of a plug is connected to a power source, and the other end of the plug is connected with a resistance wire, a voltage dependent resistor, a filter and a filter circuit. The output end of the filter circuit is connected to the input end of a MOSFET and a DCDC transformer. DC power is output to a drive module and a MCU. The MCU isconnected in parallel with a program module, a button, a remote control module, a WiFi module and a Bluetooth module through a circuit board circuit. The output ends of the driver module and the transformer are connected to the input end of the MOSFET. The output end of the MOSFET is connected to the lamp string at the end portion of the main line. The product functions of the point-control intelligent beauty lamp can be arbitrarily programmed and modified by a computer program into monochrome control, two-color control, and multi-color control.

The invention relates to a RGB-LED intelligent string light particularly, which comprises an intelligent power source and a string light. The intelligent power source comprises a plug, a transformer, and a control box which are electrically connected with a power line mother terminal in order. A loop consists of 30 LED lights. The RGB-LED light bulb is placed in the PC shell, and the bottom end of the RGB-LED light bulb is connected with two brackets, and one bracket is connected with the electric wire; the lower end of the electric wire is located at the inner part of the PC shell, and epoxy resin glue fills at the inner part of the PC shell; the upper end of the electric wire penetrates through the epoxy resin glue and extends to the outside of the PC shell; a positive pole foot and a negative pole foot of adjacent two LED bulbs are electrically connected to each other and combined to be a string light. The RGB-LED intelligent string light has the beneficial effects that single LED, partial LED and the whole string light circuit can be controlled to form single-color control, dual-color control and multi-color control. The injection molding is convenient and simple, service life of the LED is sufficiently protected, and bad proportion is greatly reduced; the greatest characteristic of the RGB-LED is the built-in address of the LED chip. Through the intelligent power control, the single LED control, multi-circuit control and other effects are reached.

The invention discloses a driving device of an LED tube. The method that a first direct-current voltage which can provide the working voltage of each LED light string of the LED tube is directly output by an AC-DC converter is applied to the driving device of the LED tube. The defects that after an existing AC-DC converter outputs a low direct-current voltage, a DC-DC boost converter is further needed so as to generate a high direct-current voltage which can be provided for the LED light string to enable the LED light string to work in the prior art are overcome. The driving device of the LED tube can reduce generated electromagnetic noise so as to reduce the design difficulty and the design cost of a needed electromagnetic noise interference suppression circuit. The driving device of the LED tube can further reduce the defect ratio of liquid crystal display products which are provided with the driving devices of the LED tubes in a factory and on the market so as to reduce the design cost of power sources of the liquid crystal display products. In addition, due to the fact that the existing DC-DC boost converter is not applied, a constant-current control circuit is adopted to ensure that each LED light string is in the constant-current state in the process of working. Besides, control over opening and closing of the constant-current circuit is used for controlling the average brightness provided by the LED tube. When the LED tube works and the detected voltage of the output end of the LED tube is larger than a protection point set valve, a dimming output port of the control circuit outputs a continuous low level signal to stop normal work of the constant-direct control circuit, the LED tube is finally switched off, and the purpose of protection is achieved.

The invention discloses a battery back silicon nitride film layer, a PERC battery and a preparation method and belongs to the field of single crystal PERC battery manufacturing. In the prior art, a battery back film is low in reflectivity, and the conversion efficiency of a battery is slow meanwhile, the temperature requirement of a back film manufacturing process is high, and energy consumption and cost are high. The invention provides a PERC battery. The battery comprises a front silicon nitride film layer, a back aluminum oxide film layer and a back silicon nitride film layer; the back silicon nitride film layer is of a five-layer structure; when the battery is manufactured, a back aluminum oxide film layer, a front silicon nitride film layer and a back silicon nitride film layer are sequentially deposited; a low-temperature manufacturing process is used, so that the photoelectric conversion efficiency of a battery piece is improved, the performance of a single crystal PERC batteryproduct is improved, energy consumption in the manufacturing process is reduced, manufacturing time is shortened, and production efficiency is improved. The manufacturing method is suitable for wide application.

The invention provides a cover-cap for a cylindrical battery, which comprises an upper cap, a lower cover and an anti-explosion ball, wherein the upper cap and the lower cover are tightly combined together, at least one exhaust vent is formed in a side edge of the upper cap, an anti-explosion hole is formed in the center of the lower cover, an accommodating space is formed between the upper cap and the lower cover, the anti-explosion ball is arranged in the accommodating space, at least one electrolyte injection hole is formed in a side edge of the lower cover, and the electrolyte injection hole is tightly matched with an electrolyte injection valve to be sealed. The invention further provides the cylindrical battery using the cover-cap. The cover-cap provided by the invention has the advantages that an electrolyte can be added according to the situation through the electrolyte injection hole in the lower cover of the cover-cap, the battery electrolyte injection defect rate is lowered and the scrappage is reduced; after the battery is used after a period of time, the electrolyte injection valve on the electrolyte injection hole is opened for an electrolyte supplement, the internal voltage of the battery is lowered, and the service life of the battery is prolonged.

The invention discloses a driving device of an LED tube. The method that a first direct-current voltage which can provide the working voltage of each LED light string of the LED tube is directly output by an AC-DC converter is applied to the driving device of the LED tube. The defects that after an existing AC-DC converter outputs a low direct-current voltage, a DC-DC boost converter is further needed so as to generate a high direct-current voltage which can be provided for the LED light string to enable the LED light string to work in the prior art are overcome. The driving device of the LED tube can reduce generated electromagnetic noise so as to reduce the design difficulty and the design cost of a needed electromagnetic noise interference suppression circuit. The driving device of the LED tube can further reduce the defect ratio of liquid crystal display products which are provided with the driving devices of the LED tubes in a factory and on the market so as to reduce the design cost of power sources of the liquid crystal display products. In addition, due to the fact that the existing DC-DC boost converter is not applied, a constant-current control circuit is adopted to ensure that each LED light string is in the constant-current state in the process of working. Besides, control over opening and closing of the constant-current circuit is used for controlling the average brightness provided by the LED tube. When the LED tube works and the detected voltage of the output end of the LED tube is larger than a protection point set valve, a dimming output port of the control circuit outputs a continuous low level signal to stop normal work of the constant-direct control circuit, the LED tube is finally switched off, and the purpose of protection is achieved.

The invention discloses a method for testing the quota of conductive adhesive for MWT components. The method includes the following steps: step 1, select at least two conductive core boards from the same production line batch as test samples; step 2, prepare EVA strips, make The good mark is used as a cable tie for bundling the conductive core board; step 3, calibrate the electronic scale, and record the weighing result of the conductive core board as W1; step 4, apply glue only to the conductive core board without laying other materials; step 5, brush glue After that, take out the conductive core board, and be careful not to touch the conductive glue, which will cause the weighing inaccuracy. After brushing the glue, the weighing result is W2; in step 6, W2‑W1 is the amount of conductive glue used. The problem to be solved by this method is the large deviation of conductive glue loss caused by the shovel glue and the blockage of the stencil hole.

The invention discloses a sectional material mold with high surface requirements. The sectional material mold comprises a mold body and feeding grooves formed in the mold body. The mold body is further provided with at least one molding cavity communicating with the feeding grooves, the included angle alpha between the side face of each feeding groove and the front end face of the mold body is larger than 90 degrees, and the bottom face of each feeding groove is in the shape with the high middle and the low periphery. The invention further discloses a using method of the sectional material mold with the high surface requirements. The method comprises the steps that 1, a spigot of the mold body and an extruder are assembled together; 2, the mold is fixed and accurately positioned through positioning pins; 3, raw materials are placed in the feeding grooves; and 4, the raw materials are continuously extruded and molded from the molding cavities under the extrusion effect of the extruder. Due to the design, the problem that raw material skin defect tissue flows into an extruded product during extrusion is solved, the extruded sectional material surface quality is improved, the ratio of rejection caused after oxidization is lowered, the workpiece yield is improved, and the cost of a single product is reduced.

The invention discloses an RGB point-controlled intelligent melamine lamp. The melamine lamp string is connected in series on the positive pole and the negative pole of the main line. One end of the plug is connected to the power supply, and the other end of the plug is connected to the resistance wire, varistor, filter and filter circuit. The output terminals of the filter circuit are respectively connected to the input terminal of the MOSFET and the DCDC transformer, and the direct current is output to the drive module and MCU. The MCU passes through The circuit board circuit is connected in parallel with a program module, a button, a remote control module, a WiFi module and a Bluetooth module, the drive module and the transformer output are connected to the MOSFET input, and the MOSFET output is connected to the light string at the end of the main line. The product effect of the point-controlled intelligent melamine lamp of the present invention can be programmed and modified arbitrarily through a computer program to form functions such as single-color control, double-color control, and multi-color control.

The invention discloses an environment-friendly transformer with a housing for potting epoxy resin employing a lost-wax process and a method for preparing the environment-friendly transformer; and the environment-friendly transformer is simple in structure, good in sealing effect and high in insulating protection capability and does not pollute the environment. The environment-friendly transformer comprises a transformer body, wherein the transformer body comprises a skeleton (1), a finished coil wound on the skeleton (1) and a silicon steel sheet (2) sleeving the skeleton (1); a plurality of connection pins (3) are arranged on the upper end surface of the skeleton (1); an integrally molded epoxy resin layer (4) coats the periphery of the overall transformer body; and the connection pins (3) are exposed on the epoxy resin layer (4) at the upper part of the skeleton (1). The preparation method comprises the following steps of (a) prefabricating a wax mold; (b) potting the epoxy resin; (c) putting the wax mold into the transformer body; and (d) removing wax and forming the transformer a demolding manner. The environment-friendly transformer can be used for the field of electronic devices.

The invention relates to and provides a water squeezing roller. By using the water squeezing roller, the structure is simple, a silicon chip surface can be effectively protected during a production process, an EL bad proportion is reduced and production cost is saved. In the prior art, during a production process, the water squeezing roller is easy to wear, production cost is high, the silicon chip surface is easy to pollute, there are a lot of finished-product defective products and so on. By using the roller of the invention, the above technical problems are solved. The roller comprises a transmission wheel group and a support shaft which is transversely arranged above the transmission wheel group. A smooth surface extrusion sleeve sleeves the support shaft. A first gap is arranged between the middle hole of the smooth surface extrusion sleeve and the support shaft. A silicon chip is clamped between the transmission wheel group and the corresponding smooth surface extrusion sleeve. The silicon chip is moved towards an output side under the driving of the transmission wheel group.