LED display quality assurance and control measures

Quality assurance and control measures 139928899631, quality assurance system in strict accordance with the ISO9001 quality assurance system model for product quality 2 comprehensive quality control, quality assurance points 1) Our selection of light emitting devices full-color Solid LED. 2) IC I choose Toshiba's integrated circuit driver chip TB BF Lu Lu II qi II with a constant current, and ensure consistency Screen display. 3) taking into account the impact of all integrated circuit currents margin, but also must consider the climate and environment. Our choice of working environment temperature screening index of integrated circuits based in -30 ℃ to 60 ℃, and continued for 72 hours. 4) All IC powered through aging, to ensure the reliability of its products. Because until after the integrated circuit has a period of instability is not powered on, aging screening can make it through the period of instability, tested, and truly determine its advantages and disadvantages. 5) temperature storage can avoid aging IC bonding process problems. 6) Switching Power Supply ao) Our choice of the name the company's products. ap) has excellent electrical properties; aq) having excellent temperature characteristics; ar) overvoltage, overload protection function; as) suddenly loses power, reenergizing no counter electromotive force of impact; at) a good filtering; au) temperature index is -30 ℃ to 60 ℃. av) 7) drive module aw) using the Toshiba drive constant current source circuit; ax) circuit boards, "three" Process; ay) module temperature aging treatment process continued for 72 hours; 8) control system az) Screen drive module division control; ba) "three prevention" technology processing; bb) using large-scale programmable gate array device to significantly reduce the number of components on the module, to improve reliability; bc) module temperature aging treatment process , ambient temperature 60 ℃ and continued for 72 hours. 9) Power electrical intelligent control bd) dynamic load balancing capabilities; be) power electric soft-start and soft-shutdown control function; bf) power anomaly, when the system is overloaded, power protection. 3, aging screening 1) LED light tube bg) Our selection of the arc tube, in terms of quality and technology can guarantee. But before packaging pixels, still for sampling. 2) integrated circuits, resistors, capacitors and other electronic components bh) all purchases (including imports) and custom components to be 100 percent after aging screened before entering processing line. 3) drive circuit module bi) temperature aging treatment process continuous operation 72 hours 4) Control system bj) high-temperature aging treatment process of continuous operation 72 hours 5) unit cabinet aging bk) All unit modules must be aged at room temperature powered continuous operation 72 h bl) for the aging problem and repair aging must be cycled continuously for 72 hours. 6) the entire screen aging bm) be not less than the factory assembly 6m2 small screen body systems powered normal aging, continuous operation for 72 hours. After bn) site installation and commissioning is complete, the system is powered on aging, continuous operation longer than 24 hours. 4, quality control measures 1) the formation of crack technical team, to focus on system design (hardware, software, structure, etc.), all the design work to implement standardized management. 2) The key materials and components are imported products, according to the quality requirements of the quality control of procurement. 3) production process in strict accordance with the process management. 4) Press the strict quality requirements of products to control the installation process. 5) The system module according to the provisions of aging, no less than 72 hours. 6) provide convenient, fast service. 5, quality assurance measures Shaanxi Hi-Tech Optoelectronic Technology Co., Ltd. in strict accordance with ISO9001 quality assurance system, system design, manufacture, testing, transportation, installation, inspection, to ensure that equipment provided by the system to fully meet the technical requirements. 1) The design control bo) All drawings and product information are clear quality standards. For example: the use of components and materials needed for the assembly process, the use of machining and decoration. bp) an effective (sub) system organization should ensure that the entire production process, quickly distributing updates specification and drawings, and timely recovery of old materials being used. bq) quality control personnel should receive all the latest drawings and effective change at any time. br) should establish a list of the drawings, each drawing shows the situation, including the submission date, review, release. 2) Document Control bs) document review and issuance of: establishing and implementing certain procedures to control all documents and data, before issuing these documents shall be reviewed and approved by authorized personnel. bt) file changes: Except as otherwise provided, change the file shall be reviewed and approved the preliminary department review and approval. 3) manufacturing control bu) display systems, the aging process of adopting international advanced production line screening, wave soldering equipment, SMT surface mount equipment, high degree of automation, the basic elimination of Weld, and weld quality problems arising; a fully anti-static measures . bv) quality control department independent from production facilities, and direct leadership of the top management, which has an independent control. Display in the production process, quality inspection departments must strictly quality control from the three stages of the procurement quality, production processes, factory inspection, to ensure conformity of the product. (1) Procurement of quality control: bw) All parts must be purchase has been reviewed qualified suppliers: bx) LED light-emitting diode CREE America, the United States AXT company, Opto Taiwan company of the arc tube by) constant current source drive devices ( Japan's Toshiba TB Lu Qi II, II-VI BF) bz) integrated circuit (Toshiba) ca) programmable gate array chip (USA ALTERA company) cb) Switching Power Supply (Taiwan Meanwell companies) cc) communication line (US security Pu) (2) production process quality control: by the quality inspection departments, and urged the production departments in strict accordance display production process, stages of semi-finished products for testing. 4) After the test is completed factory test unit cabinet, in the company set up more than 6m2 sample screen, control, distribution and software systems FBI, simulate the entire screen display system pre-acceptance. 5) The installation and commissioning of control when the site engineering, installation, quality control personnel will be assigned in the field of quality control, control includes the following aspects: (1) to ensure electrical safety cd) electrical equipment and wiring design, installation and acceptance, implementation of the current design, installation and acceptance of norms and standards, and local regulations People's Republic of China. ce) switching power supply, cables, through pipe fittings comply with the safety requirements cf) ground protection and lightning protection cg) display systems and AC power supply system of the insulation ch) all control lines, DC power cable, protective lines meet the safety requirements ci) for other automatic control the processing and delivery of sensors for quality control (2) supporting steel cj) all the support and suspension steel structure and the installation process inspection, by Shaanxi Hi-Tech Optoelectronic Technology Co., Ltd. appointed from eligibility test staff as; entrust other units, construction, quality inspector Shaanxi Hi-Tech Optoelectronic Technology Co., site supervision must be tested. ck) corrosion preventive treatment of its steel structure and the table with the base paint color should be the same as the outer decorative steel. cl) Steel Materials suppliers have certification by inspectors on-site inspection. (3) The system acceptance FBI: Screen after the installation is complete, the access control and computer system for the FBI system, ready acceptance. Owners experts itemized according to the contract in accordance with the acceptance criteria for acceptance, acceptance after the issuance of a certificate of acceptance by the owner.