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LED lights with selection and description
Published：2013/6/14 10:49:43
One, led lights with classification and distinction
Category:
LED lights with conventional divided Flexible LED Tape and LED light bar are two, but generally also includes a wire connecting the LED lights with old-fashioned, such as the flat three-wire 4.3W / m, flat four-wire 6.48W / m, flat five wire 8.64W / m with lights and so on.
Difference:
1, Flexible LED Strip is done using FPC circuit board assembly to be assembled with SMD LED, the thickness of the product is only the thickness of a coin, does not occupy space; common specifications are 30cm long 18 LED, 24 pcs LED and 50cm long 15 LED, 24 颗 LED, 30 pcs LED and so on. There 60cm, 80cm, etc., different users have different specifications. And it can cut, it can be any extension of luminous unaffected. The FPC material is soft and can be bent, folded, winding, can freely move in three-dimensional space and stretch without breaking. Suitable for irregular local and cramped places, but also because you can arbitrarily curved and winding, suitable for use in advertising in any combination of a variety of decorative patterns.
2, LED light bar is made with hard board PCB circuit board assembly, LED SMD LED useful to be assembled, but also useful for assembly-line LED, depending on the different needs of different components. The advantage of rigid strip is relatively easy to fix, processing and installation are relatively easy; shortcomings can not be bent, not suitable for irregular areas. Rigid Strip with SMD LED's have 18 LED, 24 颗 LED, 30 颗 LED, 36 颗 LED, 40 pcs LED such a good variety of specifications; using DIP LED's are 18, 24, 36, 48 different specifications, there is also a positive side, the side known as the Great Wall lights glowing.
Two, led lights with scope and installation methods
Scope:
LED lights, LED lights are now widely used in furniture, automotive, advertising, lighting, ships and other industries.
Installation Method:
① four wire lights bandwidth of about 22mm, thickness of about 8mm, weight about 0.25kg / m (4 米 one kilogram)
② four lights with a total of four wire conductors, three rows of lights (note not the four rows of lights Oh ~ ~), each row of 1 meter 24 lights, 24 * 3 = 72. Because each lamp beads power is 0.05W, 72 beads lamp with power is: 72 * 0.05 = 3.6W.
③ per meter of scissors mark, only to have to cut the tag, or scissors cut the wrong side will lead to one meter does not shine! Some will hit the mark because he missed a few, it is best to look carefully before cutting mark position, press the middle of no where connections can be cut. Look carefully can see that.
④ Each lamp must be fitted with a special plug (a plug with a transformer); connection sure to remove the clear plastic cover, and then connect the test light cover. Must not be directly connected with lid, so easy to short circuit!
⑤ lights installed, general on the light trough, and put straight on it, you can also use string or thin wire fixation. For exterior or vertical loading, wind Gouka need another child and tail plug. Original clip is fully transparent, preferably after the installation in the tail plug and the plug marked with waterproof glass glue, so waterproof better.
LED lights with troubleshooting, and how to identify quality
Three, LED lights do not light eight major reason
1, LED lights with flexible packaging protection is imperfect, resulting in the transport process damaged by the impact lamp beads.
2, LED lights with flexible solder joints Weld phenomenon, caused by vibrations during transport resulting solder off lights not bright.
3, LED lights with flexible solder less solder off easily
4, LED lights with flexible solder poor quality, LED lights with flexible joints in the bending process prone to embrittlement, shedding phenomenon
5, LED lights with flexible installation bending angle is too large, resulting in LED lights with flexible joints and copper separation result does not shine
6, LED lights with flexible installation over extruded products, leading LED Flexible Strip chip damaged or deformed joints without shedding light
7, LED lights with flexible circuit board solder layer is too thick, welding, soldering and circuit board can not be completely fused together, but also a Weld phenomenon.
8, LED Flexible Strip can not be twisted during installation, if it will cause distortion Flexible LED strip joints caused by falling off.
Fourth, how to identify the quality of LED lights:
LED lights with market varies greatly, regular factory and cottage industries product prices vary greatly. If you come from a professional to identify the quality of LED lights, I am afraid many of our clients do not have this capability. But we can simply look up from the initial identification, which can be good or bad quality of the separation.
Mainly from the following aspects to identify:
1, see the solder joints. Regular LED lights with manufacturers to produce LED lights is the use of SMT chip technology, solder paste and reflow production. Therefore, LED lights bring the amount of solder joints is smooth and no more, solder pads of an arc from the FPC to the LED electrodes extend.
2, see FPC quality. FPC of two kinds of copper and rolled copper, copper clad copper foil is protruding, look it from the junction of the FPC pads look out. And rolled copper is close and FPC as a single entity, and can be bent and will not appear pad off phenomenon. Bonded Copper pad will appear if bent too much off, when the temperature is too high maintenance can also cause pad off.
3, see LED lamp with surface cleanliness. If using SMT technology, the LED lights, the surface cleanliness is very good, do not see any impurities and stains. However, if using hand welding process produces LED lights with cottage version, no matter how clean the surface, there will be residual traces of stains and cleaning.
4, look at the packaging. Regular LED lights will use anti-static packaging paper trays, usually 5 m or 10 m roll of a roll, and then outside and then using anti-static moisture-proof bag sealed. The cottage version of the LED lights because of cost savings, while the use of recycled paper trays, then no anti-static moisture-proof bags, paper trays look carefully can see appearance of a clear label traces and scratches.
5, look at the label. Regular LED lights with bags and roll material above the disk will have a printed label, instead of printing labels.
6, see annex. Regular LED lights inside of the box will be attached instructions and lights with specifications, while also equipped with LED lights with connectors or deck; while the cottage version of the LED lights inside the box there is no such attachment because Some manufacturers, after all, could save the province.
Five, with lights illuminated attention
1, on the brightness requirements vary for different occasions and different products on the LED brightness requirements are also different. Such as LED lights jewelry counter if placed in a number of large shopping malls, we will have a number of attractive, high brightness, and the same is also divided into decorative LED spotlights and LED colorful lights with various products.
2, antistatic ability: antistatic ability antistatic ability of the LED, long life, but the price will be higher. Typically antistatic preferably higher than 700V or more.
3, the same wavelength and color temperature of the LED, the color will be the same, with the combination of lamps large quantities of particular importance. Lamps with a color which do not have much.
4, LED reverse leakage current is the current conductor, we recommend using a smaller leakage current of LED products.
5, waterproof, for outdoor and indoor LED light requirements are not the same.
6, LED emitting angle of the LED lamps great impact, requires a great deal of different lamps, like LED fluorescent intensity discharge we recommend 140-170. Others we do not explain in detail here.
7, LED chip determines the core quality LED, LED chip brand a lot, some foreign brands (such as CREE, Nichia, etc.), but also China Taiwan's (such as Canton Ga, wafer, etc.). Price difference between different brands is also very far.
8, LED chip size also determines the quality and brightness of the LED, we choose, they also try to choose a bigger chips, but the price difference.
Six, LED lights with heat problem how to solve?
1. Circuit design problems:
led lights with the most commonly used specifications are two voltage 12V and 24V, 12V series is three multiple parallel structures,
24V is a 6 string multiple parallel structures, as led lights are used to connect together, each lamp can be connected with a specific long, and the design of the time line width and the thickness of the copper foil has a great relationship. Because the unit area can withstand the current strength and the cross-section of the line, if the routing does not take into account the time it, then the connection can withstand longer than the line current, the lights will be because of overcurrent and fever, while the damage to the circuit board, and also reduces the life of the led.
2. Production process problems:
Because LED lights are series-parallel structure, so when there is a group of short circuit occurs, it will lead to the same group of other LED voltage increases, LED brightness will increase, along with the corresponding heat will rise . The most obvious is that in 5050 with lights inside, 5050 with a chip on any of them have short circuit, it will cause a short-circuit current that a lamp beads doubled, that becomes 20mA 40mA, LED brightness become very bright, but at the same heat will surge, severe burn in the circuit board within a few minutes. But this problem because it is relatively obscure, generally less likely to pay attention, because the circuit does not affect the normal lights with light, if the employee is responsible for testing only concerned about whether the LED light, rather than to check the brightness of the exception, or is not visual inspection, only electrical measurement, then, tend to ignore this problem, which is why a lot of LED lights with manufacturers complained that the products always meet customers fever but no cause lies.
Workaround:
1, the circuit design: loop as much as possible so that the wiring is wide enough spacing between lines 0.5mm enough, preferably all of the rest of the space filled. The thickness of the copper foil as possible without violating the total thickness of the circuit board customer requirements in the case thickened thickness is generally 1 ~ 1.5 OZ
2, the production process:
A /, solder paste printing time try not to let the pad between the bridging phenomenon, avoid caused by bad soldering printed circuit occurs;
B, when the patch to avoid short circuit
C, reflow SMD position before checking
D, do first after reflow visual inspection to ensure that no short-circuit phenomenon lights before making electrical measuring review, review attention LED is lit when there is no abnormality after bright or dark abnormal phenomenon.
Category:
LED lights with conventional divided Flexible LED Tape and LED light bar are two, but generally also includes a wire connecting the LED lights with old-fashioned, such as the flat three-wire 4.3W / m, flat four-wire 6.48W / m, flat five wire 8.64W / m with lights and so on.
Difference:
1, Flexible LED Strip is done using FPC circuit board assembly to be assembled with SMD LED, the thickness of the product is only the thickness of a coin, does not occupy space; common specifications are 30cm long 18 LED, 24 pcs LED and 50cm long 15 LED, 24 颗 LED, 30 pcs LED and so on. There 60cm, 80cm, etc., different users have different specifications. And it can cut, it can be any extension of luminous unaffected. The FPC material is soft and can be bent, folded, winding, can freely move in three-dimensional space and stretch without breaking. Suitable for irregular local and cramped places, but also because you can arbitrarily curved and winding, suitable for use in advertising in any combination of a variety of decorative patterns.
2, LED light bar is made with hard board PCB circuit board assembly, LED SMD LED useful to be assembled, but also useful for assembly-line LED, depending on the different needs of different components. The advantage of rigid strip is relatively easy to fix, processing and installation are relatively easy; shortcomings can not be bent, not suitable for irregular areas. Rigid Strip with SMD LED's have 18 LED, 24 颗 LED, 30 颗 LED, 36 颗 LED, 40 pcs LED such a good variety of specifications; using DIP LED's are 18, 24, 36, 48 different specifications, there is also a positive side, the side known as the Great Wall lights glowing.
Two, led lights with scope and installation methods
Scope:
LED lights, LED lights are now widely used in furniture, automotive, advertising, lighting, ships and other industries.
Installation Method:
① four wire lights bandwidth of about 22mm, thickness of about 8mm, weight about 0.25kg / m (4 米 one kilogram)
② four lights with a total of four wire conductors, three rows of lights (note not the four rows of lights Oh ~ ~), each row of 1 meter 24 lights, 24 * 3 = 72. Because each lamp beads power is 0.05W, 72 beads lamp with power is: 72 * 0.05 = 3.6W.
③ per meter of scissors mark, only to have to cut the tag, or scissors cut the wrong side will lead to one meter does not shine! Some will hit the mark because he missed a few, it is best to look carefully before cutting mark position, press the middle of no where connections can be cut. Look carefully can see that.
④ Each lamp must be fitted with a special plug (a plug with a transformer); connection sure to remove the clear plastic cover, and then connect the test light cover. Must not be directly connected with lid, so easy to short circuit!
⑤ lights installed, general on the light trough, and put straight on it, you can also use string or thin wire fixation. For exterior or vertical loading, wind Gouka need another child and tail plug. Original clip is fully transparent, preferably after the installation in the tail plug and the plug marked with waterproof glass glue, so waterproof better.
LED lights with troubleshooting, and how to identify quality
Three, LED lights do not light eight major reason
1, LED lights with flexible packaging protection is imperfect, resulting in the transport process damaged by the impact lamp beads.
2, LED lights with flexible solder joints Weld phenomenon, caused by vibrations during transport resulting solder off lights not bright.
3, LED lights with flexible solder less solder off easily
4, LED lights with flexible solder poor quality, LED lights with flexible joints in the bending process prone to embrittlement, shedding phenomenon
5, LED lights with flexible installation bending angle is too large, resulting in LED lights with flexible joints and copper separation result does not shine
6, LED lights with flexible installation over extruded products, leading LED Flexible Strip chip damaged or deformed joints without shedding light
7, LED lights with flexible circuit board solder layer is too thick, welding, soldering and circuit board can not be completely fused together, but also a Weld phenomenon.
8, LED Flexible Strip can not be twisted during installation, if it will cause distortion Flexible LED strip joints caused by falling off.
Fourth, how to identify the quality of LED lights:
LED lights with market varies greatly, regular factory and cottage industries product prices vary greatly. If you come from a professional to identify the quality of LED lights, I am afraid many of our clients do not have this capability. But we can simply look up from the initial identification, which can be good or bad quality of the separation.
Mainly from the following aspects to identify:
1, see the solder joints. Regular LED lights with manufacturers to produce LED lights is the use of SMT chip technology, solder paste and reflow production. Therefore, LED lights bring the amount of solder joints is smooth and no more, solder pads of an arc from the FPC to the LED electrodes extend.
2, see FPC quality. FPC of two kinds of copper and rolled copper, copper clad copper foil is protruding, look it from the junction of the FPC pads look out. And rolled copper is close and FPC as a single entity, and can be bent and will not appear pad off phenomenon. Bonded Copper pad will appear if bent too much off, when the temperature is too high maintenance can also cause pad off.
3, see LED lamp with surface cleanliness. If using SMT technology, the LED lights, the surface cleanliness is very good, do not see any impurities and stains. However, if using hand welding process produces LED lights with cottage version, no matter how clean the surface, there will be residual traces of stains and cleaning.
4, look at the packaging. Regular LED lights will use anti-static packaging paper trays, usually 5 m or 10 m roll of a roll, and then outside and then using anti-static moisture-proof bag sealed. The cottage version of the LED lights because of cost savings, while the use of recycled paper trays, then no anti-static moisture-proof bags, paper trays look carefully can see appearance of a clear label traces and scratches.
5, look at the label. Regular LED lights with bags and roll material above the disk will have a printed label, instead of printing labels.
6, see annex. Regular LED lights inside of the box will be attached instructions and lights with specifications, while also equipped with LED lights with connectors or deck; while the cottage version of the LED lights inside the box there is no such attachment because Some manufacturers, after all, could save the province.
Five, with lights illuminated attention
1, on the brightness requirements vary for different occasions and different products on the LED brightness requirements are also different. Such as LED lights jewelry counter if placed in a number of large shopping malls, we will have a number of attractive, high brightness, and the same is also divided into decorative LED spotlights and LED colorful lights with various products.
2, antistatic ability: antistatic ability antistatic ability of the LED, long life, but the price will be higher. Typically antistatic preferably higher than 700V or more.
3, the same wavelength and color temperature of the LED, the color will be the same, with the combination of lamps large quantities of particular importance. Lamps with a color which do not have much.
4, LED reverse leakage current is the current conductor, we recommend using a smaller leakage current of LED products.
5, waterproof, for outdoor and indoor LED light requirements are not the same.
6, LED emitting angle of the LED lamps great impact, requires a great deal of different lamps, like LED fluorescent intensity discharge we recommend 140-170. Others we do not explain in detail here.
7, LED chip determines the core quality LED, LED chip brand a lot, some foreign brands (such as CREE, Nichia, etc.), but also China Taiwan's (such as Canton Ga, wafer, etc.). Price difference between different brands is also very far.
8, LED chip size also determines the quality and brightness of the LED, we choose, they also try to choose a bigger chips, but the price difference.
Six, LED lights with heat problem how to solve?
1. Circuit design problems:
led lights with the most commonly used specifications are two voltage 12V and 24V, 12V series is three multiple parallel structures,
24V is a 6 string multiple parallel structures, as led lights are used to connect together, each lamp can be connected with a specific long, and the design of the time line width and the thickness of the copper foil has a great relationship. Because the unit area can withstand the current strength and the cross-section of the line, if the routing does not take into account the time it, then the connection can withstand longer than the line current, the lights will be because of overcurrent and fever, while the damage to the circuit board, and also reduces the life of the led.
2. Production process problems:
Because LED lights are series-parallel structure, so when there is a group of short circuit occurs, it will lead to the same group of other LED voltage increases, LED brightness will increase, along with the corresponding heat will rise . The most obvious is that in 5050 with lights inside, 5050 with a chip on any of them have short circuit, it will cause a short-circuit current that a lamp beads doubled, that becomes 20mA 40mA, LED brightness become very bright, but at the same heat will surge, severe burn in the circuit board within a few minutes. But this problem because it is relatively obscure, generally less likely to pay attention, because the circuit does not affect the normal lights with light, if the employee is responsible for testing only concerned about whether the LED light, rather than to check the brightness of the exception, or is not visual inspection, only electrical measurement, then, tend to ignore this problem, which is why a lot of LED lights with manufacturers complained that the products always meet customers fever but no cause lies.
Workaround:
1, the circuit design: loop as much as possible so that the wiring is wide enough spacing between lines 0.5mm enough, preferably all of the rest of the space filled. The thickness of the copper foil as possible without violating the total thickness of the circuit board customer requirements in the case thickened thickness is generally 1 ~ 1.5 OZ
2, the production process:
A /, solder paste printing time try not to let the pad between the bridging phenomenon, avoid caused by bad soldering printed circuit occurs;
B, when the patch to avoid short circuit
C, reflow SMD position before checking
D, do first after reflow visual inspection to ensure that no short-circuit phenomenon lights before making electrical measuring review, review attention LED is lit when there is no abnormality after bright or dark abnormal phenomenon.
