What Is an LED Cap?

LED in English (light emitting diode), LED lamp beads is the English abbreviation of LED for short, which is a popular name.

LED lamp beads

LED is English (light emitting diode), and LED lamp beads are the abbreviations of light-emitting diodes.

1. Inline low power specifications include: straw hat / helmet, round head, concave, oval, square (2 * 3 * 4) bullet, flat head, (3/5 / flat head / bread type) piranha, etc.

2. SMD patches are generally divided into (3020/3528/5050 these are front-emitting) / 1016/1024 etc. These are side-emitting light sources.

3. High Power

1. Voltage: LED lamp beads use a low-voltage power supply, the power supply voltage is between 2-4V, which varies depending on the product, so it is driven by a safer power supply than the high-voltage power supply, especially suitable for public places;

2. Current: The working current is 0-15mA, and the brightness becomes brighter as the current increases.

3. Efficiency: 80% less energy consumption than incandescent lamps with the same light efficiency.

4. Applicability: very small, each unit LED chip is a 3-5mm square, so it can be prepared into various

1.Brightness

LED lamps have different brightness and different prices.

Lamp beads: general brightness is 60-70 lm; bulbs: general brightness is 80-90 lm.

1W red light, the brightness is generally 30-40 lm; 1W green light, the brightness is generally 60-80 lm; 1W yellow light, the brightness is generally 30-50 lm; 1W blue light, the brightness is generally 20-30 lm.

Note: 1W brightness is 60-110lm; 3W brightness is up to 240lm; 5W-300W is an integrated chip, which is packaged in series / parallel.

LED lens: PMMA, PC, optical glass, silica gel (soft silica gel, hard silica gel) and other materials are generally used for the primary lens. The larger the angle, the higher the light output efficiency. With a small-angle LED lens, the light must be far away.

2.Wavelength

Consistent wavelength and consistent color. The price is high.

White light is divided into warm colors (color temperature 2700-4000K), true white (color temperature 5500-6000K), cool white (color temperature above 7000K) Europeans prefer warm white.

Red light: band 600-680, of which 620, 630 is mainly used for stage lights, and 690 is close to infrared.

Blu-ray: band 430-480, of which 460, 465 stage lights are used more.

Green light: band 500-580, of which 525,530 stage lights are more used.

3.Lighting angle

LEDs with different uses have different light emitting angles. Special lighting angle, the price is higher.

4.Antistatic ability

The LED lamp beads with strong antistatic ability have a long life and are therefore expensive. Usually anti-static LED lamp beads greater than 700V can be used for LED lighting.

5. Leakage current

LED lamp beads are unidirectional conductive light emitters. If there is reverse current, they are called leakage. LED lamp beads with large leakage current have short life and low price.

LED lamp beads are widely used in many fields such as lighting, LED large screen display, traffic lights, decoration, computers, electronic toys, gifts, switches, telephones, advertising, urban luster projects, etc.

1. Problems caused by abnormal power supply:

01. Check whether the power supply is working properly and whether the indicator light is on. If it is not on, please check whether the power supply is connected properly;

02. Check whether the power cord of the lamp beads is connected to the positive and negative poles of the power supply and whether there is reverse phase. If the above problems exist, please connect them correctly.

2, LED lamp beads for voltage requirements:

Nominal 3V LED lamp beads, in fact, different colors have different requirements for current, yellow requires the smallest current, in order is red, green, white, and blue. Excessive current will burn the wick. Using a 2.4V rechargeable battery, it is easy to burn, because even if the voltage is not large, but the current is too large, it will still burn.

3. No power detection LED:

In the case of no power, if it is convenient to choose at the time of purchase, it is recommended to prepare a 3V coin cell battery. When using this battery, you can easily check what light the LED emits.

4. Reasons for burning out high-power LED lamp beads:

01. The two upper and lower filaments are called gold wire in our industry. Pure gold is used for conduction. Two positive electrodes and two negative electrodes. A really good product will have a fifth wire, which is welded to the zener tube. Protective effect.

02. If the filament becomes shorter, it will tell you clearly that your lamp has been burned by a large current, which is equivalent to an open circuit.

03. The driving current of high power 1W is about 350ma, and the operating voltage is between 3.2-3.6V. Please pay attention when using it. Excessive current will burn the lamp.

04. Generally, the aluminum substrates of three 1W lamps are driven around 12V, and rarely are used directly at 220V. Do you see if there is a constant current source or a 12V driver power supply?

5. Reasons why the LED lamp beads are yellow:

The yellowing of the LED outer sealant is mostly caused by the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the outer sealant is baked for too long. Solution: Buy a complete set of external sealant and curing agent, such as Shanghai Fine Chemical's model 800 or 2339 glue, the following will not occur, but also pay attention to production control, strictly follow the operating instructions to avoid reasons such as excessive or insufficient baking , This situation is well controlled.

6. Reasons for LED lamp beads leakage:

The machine equipment is not grounded, and personnel are not wearing electrostatic bracelets (must be corded). Caused by improper electrostatic protection. Then there is the partial deviation of the PAD during the packaging process, and finally the hidden quality problem of the chip itself.

7. LED lamp beads should be the problem of capacitive and inductive load:

In fact, neither of them is. LED lamp beads are a diode. It needs a forward voltage to work. Generally, it is 2-3.5V. In addition, the current can control the brightness of LED lamp beads. In other words, LED lamp beads only convert electrical energy into light energy.

8. Reasons for the large luminous decay of LED lamps:

There are four reasons for the attenuation of low-power LEDs: First: the iron bracket has poor thermal conductivity. 2: Yellowing of epoxy resin. Three: The chip is not in close contact with the bracket. Four: The chip attenuation is large. If it is white light, there is also the problem of phosphor attenuation.

1. Brightness LEDs have different brightness and different prices. LEDs used in LED luminaires shall meet the Class I standards for laser class.

2. Antistatic ability LEDs with strong antistatic ability have a long life and therefore high price. Generally, LEDs with an antistatic greater than 700V can be used for LED lighting.

3. LEDs with the same wavelength and wavelength have the same color. If the color is required to be the same, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce products with pure colors.

4. Leakage current LED is a unidirectional conductive light-emitting body. If there is reverse current, it is called leakage. LED with large leakage current has short life and low price.

5. LEDs with different lighting angles have different lighting angles. Special lighting angle, the price is higher. Such as full diffusion angle, the price is higher.

6, life is the key to different quality is life, life is determined by light decay. Low light decay, long life, long life and high price.

7. Wafer The luminous body of LED is wafer. Different wafers have very different prices. Chips in Japan and the United States are more expensive. Generally, the prices of chips in Taiwan and China are lower than those in Japan and the United States.

8. Wafer size The size of the wafer is represented by the length of the side. The quality of the LED of the large wafer is better than that of the small wafer. The price is directly proportional to the chip size.

9. Colloid The colloid of ordinary LED is generally epoxy resin. LEDs with anti-ultraviolet and fireproofing agents are more expensive. High-quality outdoor LED lighting should be anti-ultraviolet and fireproof.