What are the disadvantages of COB LED strips?

With competitive price and timely delivery, Getian sincerely hope to be your supplier and partner.

COB LED Strips stands for &#;Chip on Board,&#; or &#;COB,&#; is a term used in the world of LEDs to describe the process of putting the LED chip itself in a package that is directly attached to the circuit board (PCB). The LEDs in flexible strip lights also called &#;Chip on Board&#; lights, are sometimes called &#;flip-chips.&#;

 

Flip-chip LEDs are very easy to make compared to other types of LEDs. Take a look at a typical SMD (Surface Mount Device) LED. The LED chip is held in place by lamp beads, and a phosphor coating protects the chip from the outside world. The COB LED strip has a &#;flip chip&#; that removes all the parts that aren&#;t needed, leaving just the LED chip, a yellow phosphor cover layer, and connection pads.

 

The pros and cons of COB LED Flex Strips

After you understand the basics of how this new COB-led strip is made, you can determine its pros and cons.

Advantages:

There is not even a single LED light point because there are no aluminum profiles.

A common complaint about LED strips is that they have light spots along their length. A lighting dot is a spot of light in the strip that shows where the light is coming from. A smooth light source is better than one with faults because it gives off a softer, more pleasing light.

Because the bigger diodes are so close, the light from SMD flex strips is spread evenly over the lit area. If the light source is too close to the surface, or if the strip is visible, the human visual system will be unable to avoid the hot spot.

When working with a COB flex strip with 480 chips/M, it can be hard to find the &#;hot spots&#; of each chip. Down this strip, the light from it is even and soft. The human eye is more drawn to it, and the environment is better lit when the light is even, and there are no bright spots. The only practical way to see the light source is from the back of the strip, where the flip-chip LEDs are easier to see. To know each led on the strip, the brightness must be reduced to about 5%.

Because the diodes are so small and the weight is spread out evenly along the strip, it can bend much further than other flexible strips. Because these diodes are small and close together, the strip&#;s surface is never the same. Setting up the strips is easy because there won&#;t be any loose SMD LEDs to worry about.

Because the chip on a COB strip is soldered directly to the FPCB, it does not have a gold wire. The gold wire inside standard SMD LED beads is the cause of many problems. Because the gold wire is so small, it is easy to break. This is why the chip doesn&#;t light up.

The COB strip&#;s circuit is made up of three chips, connected one at a time in parallel, then in series, and then in series again to make one step. Even if two chips inside this one-step strip go wrong, it can still burn. So even if only one or two of the 480 COB chips in a square meter don&#;t light up, this won&#;t cause dark spots or make the fixture less useful. Unlike the standard SMD strip, a CUT, this one will only light up if all of the lamp beads are good enough, making a dark area.

 

Wide degree lighting

The light from a COB light strip can be seen from 180 degrees, while a standard SMD light strip can only be seen from 120 degrees.

 

The downsides:

The biggest problem with COB-led strips is that the colors are complex to keep the same. Simply put, there is no COB-led strip binning machines on the market now. All current makers of COB-led strips occasionally sample to check color accuracy. Even worse, it&#;s hard to be sure that every COB-led strip is within a 3-step color tolerance.

The current efficiency of COB-led strip lights is only about 120LM/W. Therefore, there are better choices than the COB-led strip if you want better lighting efficiency.

Using more than 15W per meter of COB led strip&#;s maximum power is not advised. If the power goes above 15W/m, the chip&#;s heat becomes tough to dissipate because of the high density of chips per unit of length. This will make COB-led strips last less long.

 

COB Flex Strips: What Makes Them Different

The benefits and drawbacks of COB flexible light strips should be clear by now, so let&#;s dive into the nitty-gritty of this product. Some of this may sound familiar if you&#;re already familiar with LED strips. Still, some critical distinctions throughout this strip type warrant a trial run with the guidelines provided below before you commit to COB strips.

 

Splice and Join

This strip can be slit using a COB-led strip cutter, as our other strips can. Please only make cuts at the pre-marked 50mm (24) / 25mm intervals on the strip (12V). You can modify the strip&#;s length to fit your needs or create spaces as necessary. The snipped strips can be reused and are ideally linked through soldering, but we offer COB strip connectors if that&#;s impossible.

 

Dimmable

Like traditional SMD led strips, COB led strips can be dimmed.

You can utilize a DALI, Triac, PWM, or 0-10V dimming power source to achieve dimming with COB-led strips.

 

Conclusion

COB-led strips are a good choice if you want to light up a room without making hot spots. However, only a conventional SMD-led strip is a viable option if you require high lumens, high luminous efficacy, or rigorous color constancy, such as 3-step Macadam color tolerance or 2-step Macadam color tolerance.

 

 

LED strips have been a trendy DIY lighting solution for many applications for many years. That&#;s why we are so interested in the latest LED strip technology, COB flexible led strip lighting.

What is COB?

COB stands for Chip on Board in the LED field, which basically means that the LED chip is packaged directly on the circuit board (PCB). Chip on Board&#; LEDs for flexible strip lights are sometimes referred to as flip-chips.

Flip chip LEDs are basically a bare-bones approach to LED construction. Take a look at an ordinary SMD (Surface Mount Device) LED. It has a Lamp bead holder that package the LED chip and then covers it with a phosphor coating. The &#;flip chip&#; that makes up the COB LED strip removes everything from its design, except for the LED chip, yellow phosphor cover layer, and connection pads.

How is COB LED flexible strip manufactured?

1. Expanding Chips
2. Die bonding
3. Resistors onto FPCB
4. Reflow-High temperature over 65 degrees for finished PCB with chips and resistors
5. Fluorescent Powder glue mixing
6. Drop the mixing glue on the surface of chips and resistors by auto glue machine
7. Put glued cob led strip into the oven
8. QC-testing the cob led strip after cooling
9. Soldering the PCB into 5 meters per reel or the length as customer request
10. Aging test, QC test, packing, then shipping

Advantages and Disadvantages of COB LED Flex Strips

Now that you have a basic understanding of how this new COB led strip is produced, it&#;s time to see its advantages and disadvantages.

Advantages:

No LED lighting dot, even without aluminum profiles.

One of the biggest complaints about traditional LED strips is the lighting dot throughout the strip. A lighting dot is a bright area through the strip where you can see where the light is coming from. Light is more soft and attractive when it looks like a smooth light source rather than a lighting dot mess.

With SMD flex strips, the larger diodes are squeezed close enough so that the light is spread out and consistent across the illuminated surface at a distance. But if the light is too close to the surface or the strip itself is visible, the hot spot is an obstacle that the human eye cannot ignore.

With a 480 chip/M COB strip, it is pretty challenging to pick out any hot spots on the COB flex strip. This strip shines a soft, uniform light from end to end. Even light with no lighting dot is more attractive to the human eye and gives off a steady light even in the narrow places. The only natural way to see the lighting dot is to look at the back of the strip, where it is easier to see the individually placed flip-chip LEDs. You can only see the individual led if you dim strip down to about 5% brightness. This makes COB flex strips ideal for applications where

Want more information on COB Light Stands For? Feel free to contact us.

1. The led strip itself cannot be hidden from view.
2. The surface being illuminated is within 2 feet of the light bar.
3. Reflective surfaces like granite/glass are all around.
4. Those applications where you want an excellent neon effect.

More flexibility

These strips are much more flexible than other flexible strips because of the small size of the diodes and the uniform weight distribution. These diodes are so small and closely spaced that no point of the strip is the same. This uniformity makes it easy to set up the strips without planning around a SMD LED sticking out where you don&#;t need it. This extra flexibility will make it easier for them to fit into tight areas and turn corners in your application.

More stable, fewer problems

1. COB strip is the chip directly attached to the FPCB, does not come with gold wire. Traditional SMD LED strip, very many problems are caused by the gold wire inside the LED beads. Because the gold wire is too small, it is straightforward to be broken, leading to the chip not being illuminated.
2. The circuit design of the COB strip uses three chips, first in parallel, as a group, then each group, and then in series to form one step. Even if a group of two chips inside the bad, this one-step strip can continue to light. And COB a meter of chips how big 480, even if 1-2 chips do not light, will not produce dark areas, will not affect the use. While the traditional SMD strip, a CUT, as long as there are lousy lamp beads, this one cut will not light, so there will be obvious to see a section of the dark area.

Wide emitting angle

The traditional SMD light strip luminous angle is 120 degrees, while the COB light strip luminous angle is 180 degrees.

Disadvantage:

1. The most significant disadvantage of COB led strips is that it is difficult to maintain the consistency of color. Because there is no COB led strips binning machines on the market. At present, all COB led strips manufacturers are only sampling to ensure color consistency. So, COB led strips are difficult to ensure that 100% are within the 3-step color tolerance.
2. COB led strip light efficiency, currently only about 120LM/W. If you need higher light efficiency, COB led strip is not suitable.
3.  The maximum power of COB led strip, only recommended doing 15W / m. Because the number of chips per meter is too much, if the power exceeds 15W / m, the chip&#;s heat is brutal to dissipate. COB led strip life will be shortened.

SMD encapsulation procedure &#; Binning

Conclusion

If you need a light effect without light spots, you can try COB led strips. If you need strict color consistency, such as 3-step Macadam color tolerance or 2-step Macadam color tolerance, or if you need high lumens, high luminous efficacy, then you can only consider the traditional SMD led strip.

Characteristics of COB Flex Strips

If you&#;ve been listening, the advantages and disadvantages of COB flexible light strips should be obvious, so now let&#;s get into some specific details about this sort of strip. If you&#;re acquainted with LED strips, then lots of this may sound familiar, but there are some differences during this form of strip, so it&#;s best to test out the guidelines below before using COB strips.

Cut and Connect

COB led strip can cut this strip just like our other strip lights. Please only cut along the cut marks marked on the strip every 50mm (24) / 25mm (12V). This allows you to cut the strip to a custom size or add gaps to your application. The cut strips can be used again and are best connected by soldering, but if this is often not an option, our COB strip connectors also are available as an option.

Dimmable

COB led strips are dimmable as well as regular SMD led strips.

You can use DALI, triac, PWM, 0-10V dimming power supply to use with COB led strips to achieve dimming.

Color Options

White light: K, K, K, K, and other custom color temperatures are available

Colorful light: Red, green, blue, yellow, pink, etc., are available.

Tunable white, RGB, RGBW are all available.

Tunable White COB led strip

RGBW COB led strip

IP grades

IP20 none waterproof, IP52 silicone drip, IP65 silicone sleeve, IP67 silicone sleeve, and other various waterproof ways are available.

COB led strip light applications

1. Architectural
2. Furniture & wine cabinet
3. Holtel renovation
4. KTV & KTV bar
5. Parking
6. shopping mall

How to install the COB led strip light? (step by step)

1. Clean the surface where you wish to put in the COB led strip light.
2. Cut the scale of the COB led strip light you would like to put in.
3. Tear the 3M backside of the COB led strip light.
4. Paste the COB strip light where you would like to put in.
5. Connect the ability supply with COB led strip light.
6. If you wish to attach the COB led strip light, you&#;ll be able to solder or use the connector.

After you read this article, I believe you already have a basic understanding of COB led strips. If you want to know more, please visit https://www.ledyilighting.com/all-you-need-to-know-before-buying-cob-led-strip/