How to see the quality of LED transformation light panels

Due to the asymmetry of information such as professional knowledge, component selection, and process level, and the lack of testing equipment and means, ordinary consumers cannot really confirm the quality of the light board.

The transformation of the lamp board is as an accessory of the lamp, the external quality supervision is definitely worse than the complete lamp, the overall quality stability is not guaranteed, not that it must be poor, but by the conscience and uncertainty of the industry, resulting in a large difference in quality. For the quality of a specific light board, just like the self-deprecation of consumers--- look at the character.

The quality of the driving power supply (preferably a constant current source) and whether it matches the LED have a decisive impact on the light efficiency and life of the lamp, and the difference in installation level (fixing, wiring, DIY to increase heat dissipation) also has a non-negligible impact on the life of the modified light board.

Under amateur conditions, the quality of a modified lamp board can only be judged indirectly and roughly according to the light efficiency of the lamp pearl, the manufacturing quality of the aluminum-based circuit board, the quality of component welding, etc., although sometimes it may not be reliable.

The dimming is due to both conditions.

The LED drive current becomes smaller.

The current limiting resistor of the LED driver becomes larger.

RC when LED drives the power supply

scheme, c becomes smaller.

LEDs are made of high power.

It is the selling point of the manufacturer, but it is not well done due to heat dissipation.

and caused by light decay. I guess so.

The most likely, if it is light decay then the only way to replace the LED

The lamp beads are up. Hope iQiliang.

Replacing the LED lights will not damage the motherboard. Changing the lights will not damage the trip computer in general, but it may affect the car's light control unit.

LED headlights.

It refers to the use of LEDs (light-emitting diodes.

A light source for a car. Because LED has the characteristics of high brightness, rich color variety, low power consumption and long life, LED is widely used in the automotive field.

Taillight. Common exterior lights are: front noise lights, fog lights.

License plate lights, reversing lights, brake lights, turn signals, position signals, and marker lights.

Parking and warning lights and daytime running lights.

The light color of external lamps is generally white, orange and red; Vehicles performing special tasks, such as fire trucks, police cars, ambulances.

For emergency repair vehicles, red, yellow or blue flashing warning lights with priority are used. Motor vehicles should participate in safety inspections and comprehensive inspections on time to ensure that external lamps and lanterns are complete and effective.

Headlights, commonly known as "headlights", are installed on both sides of the head of the car and are used to illuminate the road in front of the car. There are two lamps and four lights. When the four-lamp headlamp is installed side by side, the one installed on the outside is a low-beam and high-beam double-beam lamp; The one mounted on the inside is a high-beam single beam lamp.

The high beam is generally 40 60W, and the low beam is generally 35 55W.

1. Dial the gear of the multimeter to the diode gear (beeping gear) <>

2. Connect the positive pole of the watch pen to the side of the LED light.

3. Connect the negative meter pen to the other side of the LED light.

4. Check whether the LED light can be lit, if not, measure the position of the two watch pens interchangeably, and it is normal to light up.

5. If the LED light is not lit after two measurements, it means that the LED light is broken.

1. Chip size: The size of the chip is expressed by the side length, and the quality of large chip LED is better than that of small chip.

2. Look at the label: There will be printed labels on the regular LED strip packaging bags and coil trays, not printed labels. The label of the copycat version is printed, and the specifications and parameters are not uniform.

3. Look at the accessories: the regular LED strip will be attached to the packing box with instructions for use and the specification of the strip light, and it will also be equipped with an LED strip connector or a card holder; The copycat version of the LED strip does not have these accessories in the box.

The LED light is cured to the bracket with silver glue or white glue, and then the chip and circuit board are connected with silver wire or gold wire, sealed with epoxy resin around to protect the internal core, and finally the shell is installed, so the LED light has good seismic performance.

The method of judging the quality of LED lights is as follows:

1. Choose from the brand. You should choose a famous brand or trademark with "R" has been registered enterprise products, LED lights have a beautiful appearance, product trademarks, models, specifications and printed handwriting are clear and beautiful, and there should be no deformation and paint loss, uneven color and other phenomena.

2. LED lamps are usually made of aluminum as radiators, and the larger the contact area between the radiator and the air, the better, which is conducive to heat dissipation, stable work of the whole lamp, and long life of light decay; Do not have too large ventilation holes in bulbs and ceiling spotlights, so as to avoid mosquitoes from crawling in during use, affecting the lighting effect or causing unnecessary damage.

3. LED bulbs, ceiling spotlights, and track spotlights, if they are illuminated on a white wall, there should be no obvious color temperature errors such as color spots and color circles.

4. When the LED light is turned on, there is a time difference between a few tenths of a second and two seconds between the energizing and the lamp, which is a normal phenomenon.

5. Do not heat up the lamp body too high or unevenly when working, if there is such a phenomenon, it means that there is a problem with the design or production process of the lamp, and the light decay is easy to damage.

6. Due to the high brightness of LED lights, it is difficult to judge the brightness of two brands of the same type of lamps under the same conditions, and it is easy to hurt the eyesight. Usually we recommend using a blank sheet of paper to cover the light source, and then compare it after the light is attenuated by the white paper, so that it is easier to see the difference in the brightness of the light, and the higher the brightness, the better. In addition, the color temperature is close to that of sunlight is the best.

7. If time permits, you can compare the brightness of two lamps of the same specification first, and then light one of them continuously for a week, and then compare the brightness with the lamp compared before.

8. For those ceiling spotlights, track lights, high-power integrated light sources, COB high-power light sources, and multi-chip products that can be easily removed from the mask to see the lamp beads, they can be powered on and lit after closing the eyes to see the lamp bead light source, and then open the eyes while turning off the power supply, you will see the afterglow of the lamp bead chip. The whole lamp is easy to be damaged, and the life is short, so it is not easy to buy.

9. When the LED lamp is working, there are refrigerators, air conditioners, water heaters and other high-power electrical appliances around it, there should be no corresponding light and dark changes, if there is such a phenomenon, it means that the drive of the LED lamp is not constant current or constant voltage, which has a certain impact on the life of the lamp.

10. There is a kind of social circulation through the mobile phone screen to observe the LED light with a camera to judge its quality, so it is not accurate to judge the quality of the lamp, there are stripes rolling and flashing is definitely not good, no stripes rolling and flashing may not be good, because our different mobile phone screens and cameras, their scanning refresh rate is different, for those low-end capacitance and step-down drive products, their sensitivity is also different.

With the development of science and technology, the light bar has entered our lives, it is a product that can replace the traditional LED light beads, which is more excellent in appearance and function, so how to repair the light bar if it is broken? Today, I will introduce some methods to you. 1. How to repair the broken light bar 1, first of all, let's check it first to see where the damage occurs, if it is an internal problem, we can take out the chip inside, and then replace it.

You can also use a heat gun to heat the chip, which will speed up its repair. 2. If there is a problem outside, we need to remove the external circuit and reconnect the internal circuit. However, it should be noted that in the process of connection, the integrity of the line should be ensured, and no errors should occur.

2. How to extend the life of the lamp? 1. Pay attention to moisture-proof: because many lamps and lanterns will be affected by moisture during use, resulting in a shorter service life.

Therefore, we must pay attention to moisture-proof in daily use, especially some more important electrical equipment, which must be placed in a dry and ventilated environment. 2. Pay attention to cleaning: Because too much dust will affect the use of lamps, we usually need to clean the lamps frequently.

At the same time, the power cord should be cleaned regularly to avoid short circuits. The above is the introduction to you about how to repair the broken light bar and how to extend the life of the lamp. I hope to help you solve related questions.

Summary. Dear We are happy to answer for you, the following is the result of your inquiry The method of replacing the led light is as follows:1

Turn off the power and unplug the power cord of the LED light. 2.Open the housing of the LED light and remove the broken LED light.

3.Replace the broken LED lights with new ones. 4.

Install the new LED lights and close the housing. 5.Plug the power cord in, turn on the power, and check if the new LED light is working properly.

The LED light flashed and broke, can it be repaired. Or just buy other lights.

Dear We are happy to answer for you, the following is the result of your inquiry The method of replacing the led light is as follows:1Turn off the power and unplug the power cord of the LED lamp.

2.Open the housing of the LED light and remove the broken LED light. 3.

Replace the broken LED lights with new ones. The former 4Install the new LED lights and close the housing.

5.Plug the power cord in, turn on the power, and check if the new LED light is working properly.

It's a lamp that can change color, and the wiring inside is LED, so I don't know if it can be repaired.

Is it possible not to change the shell?

Dear, the situation you said may be the damage of the LED lamp beads. That is to say, the LED lights in our home are broken, and then we find that most of the lamp beads are not lit or all of them are not lit. Problems like this are also a relatively common problem of LED lamp beads being burned out.

In fact, the way to judge this is very simple, that is, we disassemble the lampshade of the ceiling lamp, and then observe the lamp beads of the LED lamp. If you find that the lamp is black or has traces of burning, it is basically judged that the LED lamp has been burned out. Buried on land.

It's just burned out, what should be done to get it right.

Flashing and not bright, like poor contact.

Quickly change the lamp beads, and we can buy a lamp bead with an approximate power at this time. Like our common household LED lights, they are generally about 25W 35W, and we replace the lamp beads after Huaimeng after the lead Changqiao.

There is also a possibility that the driver base comm is broken and can replace the driver of the power supply of an LED light, for this power adapter, I can buy the same model, and then remove the wires connected to the left and right, and then replace the new driver with a new one, and then try to see if it can be lit normally.