The LED display screen is a display terminal similar to a computer monitor that can display images and texts in a large area, high brightness and high resolution since the beginning of this century. LED is used as the pixel point, and the effect of restoring video, text, etc. is achieved by controlling the color, brightness and lighting time of each LED pixel.
First, the display LED lamp beads introduction
1, OVAL LED (elliptical) plug-in LED: The earliest is a kind of LED package form introduced by some large foreign LED companies: more representative are NICHA, CREE and so on. Representative products are 546, 346. This product is mainly used in outdoor and semi-outdoor areas for long distance viewing. The utility model is characterized in that: the anti-UV epoxy resin package has good affinity and waterproof performance; the ability to adapt to the environment is good; the brightness is high and the color is bright; the disadvantage is that the volume is large, which is not conducive to making the fine pitch and HD screen.
2, SMD LED (SMD): Currently widely used in indoor LED display lamp beads. Mainly in the form of PPA prefabricated cup, the LED chip is fixed in the PPA prefabricated cup, and then filled with silicone resin or silica gel. The light of the LED chip is derived by the cup-shaped secondary optical reflection. More representative companies include NICHA, CREE, Lehman Optoelectronics, and Guoxing Optoelectronics. Representative product models are: 5050, 3528, 3020, 2724, 2121 and so on. This product is mainly used in indoors for closer viewing. The utility model is characterized in that: the patch package form is adopted, which is convenient for automatic operation (SMT); the small size is suitable for the screen with dense spacing; generally, the three-in-one form is adopted, the three primary color pixels are concentrated, and the color reproduction is good; the disadvantage is that three types are adopted. The combination of materials, in which PPA has poor affinity with metal stents, filled silica gel or silicone resin, is therefore poor in weather resistance and is not suitable for long-term use in outdoor applications.
Both of the above LEDs have been used in the display field for a long time, and there are certain limitations in application. Can there be an LED that can be used in a dense outdoor space and has a strong outdoor weather resistance?
Shenzhen Lanke Electronics has developed a display LED-SUPER TOP LED that can be used indoors and outdoors, using the experience and technology accumulated in the long-term packaging process of piranha lamp and LED display LED (OVAL DIP LED).
Second, the introduction of SUPER TOP
According to Lanke Electronics, SUPER TOP LED products have the following characteristics:
a. Adopting the piranha package form, featuring high reliability and good heat dissipation performance;
b. The packaging material is made of high performance epoxy resin, which has excellent anti-UV and moisture resistance;
c. It adopts three-in-one package, which has the characteristics of high brightness and high resolution;
d. The brightness is higher than the traditional three-in-one display LED, so it has the characteristics of energy saving and high efficiency.
1 , SUPER TOP and traditional display LED comparison
*Condition: 200 cycles of wet heat alternating test, and then 95 ° C red ink test for 1 hour.
* At present, our company has cooperated with plug-in equipment manufacturers to jointly develop automatic plug-in equipment. It is expected that there will be an automatic plug-in machine prototype in May.
2 , product shape
3 , product advantages
a, super waterproof and low light decay;
Because the package form draws on the binary packaging structure of the piranha LED, the shape encapsulation adopts high-transparency, high-binding ability and stability of the package glue, so that the product has excellent waterproof and moisture-proof ability. High temperature (Ta=80°C, If=20mA) light decay test, 3000 hours light decay <10% (test ability is equivalent to 6000 hours of normal temperature use of LED)
b, high brightness;
According to the comparison with existing products, STL products are about 10% brighter than ordinary three-in-one products. The comparison data is as follows:
c, the light distribution curve is excellent;
The patented bracket design of the LED uses a raised solid crystal stage to push up the LED chip, so that the LED chip is concentrated near the focus of the LED LENS, and the LENS design is adopted to achieve a better optical drive line. The R, G, and B curves almost coincide, but since the R color wavelength is in the long wave, the brightness is high. In order to improve the visual effect of the R color at various angles, the artificial design has an R color angle slightly smaller than B and G by 5 degrees. As shown below:
Third, product application comparison
The display module made of SUPER TOP LED has excellent weather resistance and wide viewing angle. The design case is as follows:
Take P10 as an example, the design is 1/4 scan, the driver IC adopts MBI5024, and the module design is 16X16 points:
Lanke extracted the P10 (1/4 scan) module samples made by TOP5050 on the market for comparison. The data is as follows:
Lanke Electronics concluded that SUPER TOP LED has excellent performance and can be used in most environmental conditions, and has been verified and suitable for use in a wide range of outdoor and semi-outdoor applications. Currently, the minimum P8 can be achieved. Indoor and outdoor LED display with spacing; with the existing brightness condition, the outdoor P10, P12 and P16 have good effects.
First, the display LED lamp beads introduction
1, OVAL LED (elliptical) plug-in LED: The earliest is a kind of LED package form introduced by some large foreign LED companies: more representative are NICHA, CREE and so on. Representative products are 546, 346. This product is mainly used in outdoor and semi-outdoor areas for long distance viewing. The utility model is characterized in that: the anti-UV epoxy resin package has good affinity and waterproof performance; the ability to adapt to the environment is good; the brightness is high and the color is bright; the disadvantage is that the volume is large, which is not conducive to making the fine pitch and HD screen.
2, SMD LED (SMD): Currently widely used in indoor LED display lamp beads. Mainly in the form of PPA prefabricated cup, the LED chip is fixed in the PPA prefabricated cup, and then filled with silicone resin or silica gel. The light of the LED chip is derived by the cup-shaped secondary optical reflection. More representative companies include NICHA, CREE, Lehman Optoelectronics, and Guoxing Optoelectronics. Representative product models are: 5050, 3528, 3020, 2724, 2121 and so on. This product is mainly used in indoors for closer viewing. The utility model is characterized in that: the patch package form is adopted, which is convenient for automatic operation (SMT); the small size is suitable for the screen with dense spacing; generally, the three-in-one form is adopted, the three primary color pixels are concentrated, and the color reproduction is good; the disadvantage is that three types are adopted. The combination of materials, in which PPA has poor affinity with metal stents, filled silica gel or silicone resin, is therefore poor in weather resistance and is not suitable for long-term use in outdoor applications.
Both of the above LEDs have been used in the display field for a long time, and there are certain limitations in application. Can there be an LED that can be used in a dense outdoor space and has a strong outdoor weather resistance?
Shenzhen Lanke Electronics has developed a display LED-SUPER TOP LED that can be used indoors and outdoors, using the experience and technology accumulated in the long-term packaging process of piranha lamp and LED display LED (OVAL DIP LED).
Second, the introduction of SUPER TOP
According to Lanke Electronics, SUPER TOP LED products have the following characteristics:
a. Adopting the piranha package form, featuring high reliability and good heat dissipation performance;
b. The packaging material is made of high performance epoxy resin, which has excellent anti-UV and moisture resistance;
c. It adopts three-in-one package, which has the characteristics of high brightness and high resolution;
d. The brightness is higher than the traditional three-in-one display LED, so it has the characteristics of energy saving and high efficiency.
1 , SUPER TOP and traditional display LED comparison
| category | SUPER TOP | SMD5050 | DIP346 |
| Packaging material | Epoxy resin | PPA cup filled with epoxy or silicone | Epoxy resin |
| Characteristics | DIP package form, three-in-one | SMT surface mount flat package form, generally made into three-in-one | DIP package form, generally made into three spells one or four spells one |
| Key control | Wafer selection, glue selection, stent plating, baking temperature | Temperature and humidity, wafer and scaffold materials, glue selection, baking temperature | Glue selection, stent plating, baking temperature |
| Production Process | Bracket-solid crystal-baking-welding-sealing-baking-cutting-split | Bracket - Solid Crystal - Baking - Wire Bonding - Dispensing - Baking - Cutting PIN - Beam Splitting - Tape | Bracket-solid crystal-baking-welding-sealing-baking-cutting-split |
| Waterproof effect | Well, due to the plug-in type, it is fully sealed with epoxy resin, which is excellent in waterproof and moisture proof. | In general, it is mainly the sealing problem between PPA and silicone resin, which has not been solved very effectively. | Well, due to the plug-in type, the LED epoxy resin is encapsulated, which is excellent in waterproof and moisture-proof. |
| LED light protection | The surface is encapsulated with epoxy resin, which is excellent in anti-UV, anti-aging and corrosion resistance. | Due to the silicone or silicone (also epoxy) potting method, it is resistant to UV and weather resistance. | The surface is encapsulated with epoxy resin, which is excellent in anti-UV, anti-aging and corrosion resistance. |
| High and low temperature cycle* | Good resistance to heat and humidity, good sealing performance | After the cycle test, there was a serious red ink penetration. | Good resistance to heat and humidity, good sealing performance |
| Finished product brightness | Higher | Lower | Very high |
| Scope of application | Outdoor, indoor, semi-outdoor | indoor | Outdoor, semi-outdoor |
| Heat sink area | 12mm 2 (R+G+B) | 8.8mm 2 (R+G+B) | 22mm 2 (R+G+B) |
| Finished angle | The angle is relatively uniform, generally at 110-120° | The angle is relatively uniform, generally at 110-120° | The angle is relatively uniform, generally at 100-110° |
| advantage | High brightness, sealed, UV resistant, Resistant to moisture, easy to seal, easy to do outdoor screen, low cost | Small size, patch form facilitates automatic operation, large and uniform angle, easy to make dense indoor screen, made into three-in-one | High brightness, good sealing, anti-UV, anti-humidity, excellent waterproof performance, good weather resistance, small size, moderate angle, good for high density outdoor screen, make three-in-one |
| Disadvantage | Large volume and low efficiency of plug-in, which is not conducive to making fine pitch | Moisture resistant, UV resistant, and weather resistant | * There is no mature automatic plug-in device, and it is inconvenient to automate production. |
*Condition: 200 cycles of wet heat alternating test, and then 95 ° C red ink test for 1 hour.
* At present, our company has cooperated with plug-in equipment manufacturers to jointly develop automatic plug-in equipment. It is expected that there will be an automatic plug-in machine prototype in May.
2 , product shape
3 , product advantages
a, super waterproof and low light decay;
Because the package form draws on the binary packaging structure of the piranha LED, the shape encapsulation adopts high-transparency, high-binding ability and stability of the package glue, so that the product has excellent waterproof and moisture-proof ability. High temperature (Ta=80°C, If=20mA) light decay test, 3000 hours light decay <10% (test ability is equivalent to 6000 hours of normal temperature use of LED)
b, high brightness;
According to the comparison with existing products, STL products are about 10% brighter than ordinary three-in-one products. The comparison data is as follows:
| product type | H factory | L Factory | G factory | J factory | LK STL5454 | ||||
| SMD3528 | SMD5050 | SMD3528 | SMD5050 | SMD3528 | SMD5050 | SMD3528 | SMD5050 | ||
| R | 180 | 300 | 500 | 750 | 370 | 500 | 229 | 750 | 750 |
| G | 350 | 880 | 1050 | 1550 | 1100 | 1750 | 980 | 1350 | 1750 |
| B | 90 | 190 | 210 | 300 | 310 | 580 | 210 | 260 | 320 |
c, the light distribution curve is excellent;
The patented bracket design of the LED uses a raised solid crystal stage to push up the LED chip, so that the LED chip is concentrated near the focus of the LED LENS, and the LENS design is adopted to achieve a better optical drive line. The R, G, and B curves almost coincide, but since the R color wavelength is in the long wave, the brightness is high. In order to improve the visual effect of the R color at various angles, the artificial design has an R color angle slightly smaller than B and G by 5 degrees. As shown below:
Third, product application comparison
The display module made of SUPER TOP LED has excellent weather resistance and wide viewing angle. The design case is as follows:
Take P10 as an example, the design is 1/4 scan, the driver IC adopts MBI5024, and the module design is 16X16 points:
| colour | Drive current (mA) | Brightness (cd/m 2 ) | angle) | Color temperature (K) | Contrast (Bmax-Bd)/Bd |
| R | 20 | 1905 | 120 | 1500 | 6.05 |
| G | 30 | 5260 | 118 | 8203 | 1.47 |
| B | 15 | 650 | 115 | 25000 | 4.08 |
| W | - | 6850 | 118 | 11280 | 0.53 |
Lanke extracted the P10 (1/4 scan) module samples made by TOP5050 on the market for comparison. The data is as follows:
| colour | Drive current (mA) | Brightness (cd/m 2 ) | angle) | Color temperature (K) | Contrast (Bmax-Bd)/Bd |
| R | 32 | 1970 | 120 | 1500 | 4.5 |
| G | 40 | 3347 | 118 | 8226 | 1.51 |
| B | twenty one | 648 | 116 | 25000 | 2.54 |
| W | - | 5871 | 118 | 11530 | 0.5 |
Lanke Electronics concluded that SUPER TOP LED has excellent performance and can be used in most environmental conditions, and has been verified and suitable for use in a wide range of outdoor and semi-outdoor applications. Currently, the minimum P8 can be achieved. Indoor and outdoor LED display with spacing; with the existing brightness condition, the outdoor P10, P12 and P16 have good effects.
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