两个小婕子交换3_日本无码av免费_免费视频成人片在线观看_精品人妻大屁股白浆无码_攀上漂亮女领导阅读全文_人成午夜大片免费视频_色窝窝51精品国产人妻消防_午夜影院0606免费_麻花传剧原创mv在线看视频

Characteristics of LED piranha: The LED piranha has four legs, two more than a typical 5mm LED, and the light emitting portion of the four legs is at a certain distance from the welding point of the circuit board. The space reserved for the design of the four legs is to allow the LED piranha to dissipate much better heat than ordinary LEDs, and can pass a higher operating current, with a maximum of 40-50MA. Ordinary LEDs are 20MA, so the brightness is higher than ordinary LEDs.

The disadvantage is that the volume is a bit larger than the ordinary 5mm LED, and the angles are around 3045 °, 60 °, 90 °, 120 °, 140 °, and 160 °, without any other angles. The full color RGB mixing effect is poor, better than 5mm straw hat LED.

LED piranha is the brightest of low-power LEDs, but compared to high-power 1W and 3W.

However, each type of LED has its own uses, and it is not only necessary to compare brightness, while laymen blindly compare brightness. Insiders look at parameter matching, consistency, chips used, and so on.

It is best to use 10MM LED or high-power 1W LED for grille and eyebrow lights in automobiles, and use small angles. Piranhas don't have too small angles.

LED piranha packaging process: The packaging of LED piranha has its particularity. First of all, you must choose a bracket for LED piranha. According to the number of LED chips to be placed in each piranha tube, it is necessary to determine the shape, size, and depth of the concave bowl in the piranha bracket.

Clean the holder before use and secure the LED chip in the holder bowl. After drying, solder the two poles of the LED chip, and then select the corresponding mold based on the number of chips and the size of the light angle. Fill the mold with glue, align the piranha bracket with the LED chip welded to the mold, and insert it upside down into the mold. After the glue has dried (oven dried), the mold can be released. Then it is cut on the chopping knife mold, and then tested and sorted. The technical indicators of LED piranha are the same as those of other packaged LEDs. When multiple chips are packaged on a piranha bracket, relevant thermal resistance should be considered to minimize thermal resistance to extend service life.

Since the LED piranha has four legs, it is necessary to leave four holes on the printed circuit board in order to install the LED piranha. Because the two electrodes of the LED are connected to the four legs, the two legs are connected to one electrode. During installation, confirm which two legs are positive and which one is negative, and then design the PCB.

The shapes of piranha packaging molds are also diverse, including φ 3mm round head and φ 5mm round head, also with concave flat head shape. According to the requirements of light angle, various packaging molds can be selected.

LED piranha application: LED piranha is receiving increasing attention because it is more and more important than φ 5mm LED has better heat dissipation, larger viewing angle, lower light attenuation, and longer service life. Piranha

Red LED piranha

LED is very suitable for making line lights, backlight boxes, and large slot light sources.

Due to the fact that linear lights are commonly used as contour lights for high-rise buildings in cities, backlit advertising screens and large font lights are placed high, and if the LED lights are not lit or dim, their maintenance is difficult. Due to the good heat dissipation of LED piranha φ Compared to 5mm ordinary LEDs, their light decay is small and their lifespan is long, resulting in longer usage times and significant maintenance savings.

LED piranha can also be used as brake lights, steering lights, and reversing lights in cars. Because LED piranha has advantages in heat dissipation, it can withstand a current of 70-80mA. In driving cars, the voltage of the battery often fluctuates significantly, especially when using brake lights, and the current suddenly increases. However, this situation has little impact on LED piranha, so it is widely used in automotive lighting

LED piranha power consumption estimation: 1. Static real pixels (equal spacing and non equal spacing are the same): 16 * 8 real pixel single mode group maximum power consumption 16 * 8 * 3 * 0.02=7.6816 - 16 pixel width; 8-8 pixels high; 3 - Each pixel has 3 currents; 0.02 - Estimate the magnitude of each current.

Note: The series connection of two red LEDs in 2R1G1B real pixel only counts as one current. 2. Static virtual pixels (equispaced) 2R1G1B: Maximum power consumption of a single mode group 16 * 8 * 4 * 0.02=10.2416 -- 16 pixel wide;

LED piranha

8-8 pixels high; 4 - Each pixel has 4 currents; 0.02 Estimate the magnitude of each current.

Note: The two red LEDs of the 2R1G1B virtual pixel are separated, and each lamp calculates a current.

3. Scanning real images (1R1G1B) or (2R1G1B): Take the P10 full color four scan 16 * 16 module as an example, and the maximum power consumption of a single mode is (16 * 16 * 3 * 0.03)/4=10.2416 -- 16 pixel point width; 8-8 pixels high; 3 - Each pixel has 3 currents; 0.02 - estimate the magnitude of each current; 4-1/4 scan.

Note: 1R1G1B real pixel four LED tubes are connected in parallel to calculate one circuit of current; The estimated utilization rate of each power supply on the scanning board is 80%.