Common for resonant capacitor C6 breakdown (short circuit) or low voltage (soft breakdown), should be replaced with the same capacity of high quality polyester or CBB capacitor with the voltage above 1kV. Open tube filament. If LED lamp tube is not seriously blackened, it can be used in emergency after connecting 0.047μF/400V polyester capacitor at both ends of the broken wire lamp pin. R1 and R2 are open or variable (generally, R1 is more likely to fail) and replaced with 1/4W high quality resistance of the same resistance value. The LED lights flickered. If the LED lamp tube is not seriously black, check whether D5 and D6 have false welding or open circuit, if D5 and D6 soft breakdown or filter capacitor C1 leakage and bad, will also make the light flicker.
LED luminescence mechanism. The LED consists of P region, N region, and the barrier region between them. The P region has extra holes, which can be regarded as a positively charged unit particle. There are extra electrons in the n-block, which are negative; The barrier is where the holes in the P region meet the electrons in the N region, and some equilibrium can be achieved without electricity. When a forward current is injected at both ends of the PN junction (i.e., the input of the DC regulated power supply), the injected non-equilibrium carriers (electron-hole pairs) compound luminescence during diffusion.
Common-Cathode CC 8011AGG 7-Segment digit 8011AGG LED Common-Anode CA 8011BGG Display 8011BGG 0.80 inch
Common-Cathode CC CL8011AGG 7-Segment digit CL8011AGG LED Common-Anode CA CL8011BGG Display CL8011BGG 0.80 inch
In this way, LED lights can convert most of the electricity into light energy, so the energy consumption is lower. In contrast, LED CFLS have a lifespan of more than 50,000 hours. In this case, why is there still a perception in the market that LED lights waste electricity and have a short life? The production of LED lamp needs to have the corresponding technical ability. For the sake of interests, driven by the prospect of LED lights, some merchants do not produce LED energy-saving lamps in accordance with the standard process, but hastily produce them, resulting in inferior and vulnerable products.
The average temperature in summer can reach 40℃, even in December, the average temperature is as high as 15℃~24℃. This extreme climate also put forward more stringent requirements for LED display screens, such as high lighting and fast heat dissipation. Zhao Kai, vice president of Abison, said that the displays supplied by the company are tailored to the event, not only the high-precision pixel LED displays, but also the standards used in European and American competitions.
The commonly used bonding wires for LED device packaging include gold wire, copper wire, palladium-plated copper wire and alloy wire. Glue, at present, the glue of LED display device packaging mainly includes epoxy resin and silicone two categories. Epoxy resin. Epoxy resin is easy to age, easy to be wet, poor heat resistance, and short-wave light and high temperature easy to change color, in the colloid state has a certain toxicity, thermal stress and LED is not very matched, will affect the reliability and life of LED.
The advantages of LED energy-saving lamps
Power supply 12V LED misused into 24V
LED detection process
The LED lights flickered.
When the LED lamp is difficult to light
LED lamps and ordinary energy-saving lamps
Promoting the use of LED bulbs
Generation of green light source LED
LED light source called longevity lamp
LED light source is low pressure microelectronics product