What are the advantages and disadvantages of high power LEDs, and what are the advantages of LEDs?

Due to the low conversion efficiency of high-power white LED, small luminous flux, high cost, long use of white light and easy to change color, heat dissipation and other factors, so the short-term application of high-power white LED is mainly in some special areas of special work lamps, and the medium and long-term goal can be in the field of general lighting.

Comparison of high-power and standard-power LED products.

1. Simplify the design process.

Due to the need to consider greatly simplifying thermal management, the design process required for a standard LED array is much simpler than the design process required for high-power technologies. In our theoretical example, it takes 350mA to drive 1W LEDs, while only 120mA is required for six standard LED arrays. High-power technologies require the use of heat sinks and metal core PCBs to ensure that there is no loss of efficiency, reduced service life, or fading caused by high junction temperatures.

Because standard LEDs do not require heat sinks, metal-core printed circuit boards (MCPCBs), capacitors, or resistors, these LEDs are easier to design, test, and manufacture. This streamlined process not only saves time and money in the production process, but also speeds up the time to market for products.

2. Cost saving.

High-power LEDs require thermal management, which greatly increases the cost of LEDs. The most expensive add-on in the design process is the heat sink. Heat sinks can be made from a variety of metal materials, ranging from the relatively inexpensive aluminum to the more electrically conductive but more expensive materials such as copper and silver.

These expensive materials can lead to an increase in the cost of high-power products by $1 10, which can be avoided by standard LED devices.

Similarly, high-power LEDs also require the use of MCPCB as another passive cooling technology to control junction temperature. Because the materials of MCPCBs have better thermal conductivity, these boards are more efficient at heat dissipation than the cheaper FR4 PCBs used in standard LEDs. However, the cost can be up to 5 times the cost of FR4 PCBs.

Using a cheaper FR4 PCB,** the need for expensive heatsinks, and considerations for simplifying the design can result in cost savings of up to 60%.

3. Save space.

When the internal space constraints of the device are very large, standard LEDs are often the best choice. As mentioned above, high-power LEDs require the use of additional heat sinks and generally space-intensive cooling technology. Its first task was to create more surface area for convection and radiative cooling.

A larger surface area can help reduce heat more effectively, but it also increases the volume of high-power LEDs. This adds to the design hurdle for smaller spaces and smaller products.

Standard LED arrays typically eliminate the need for space-occupied drivers, capacitors, and resistors (all required for high-power LEDs), saving up to 50% of space. For space-constrained applications, standard LED arrays can provide the same brightness as high-power LEDs, while at the same time saving significant space.

The jelly head of the lamp bead is easy to break.

To be driven by constant current power supply.

The heat dissipation must be passed.

When the lamp beads are shining, there should be no foreign matter such as dust (black body overheating, damage to epoxy resin, jelly head) and other foreign objects on the surface.

Single-core lamps above 5W are prone to light decay (unless the light efficiency is above 130 LM W).

First, the size is small.

Second, low power consumption.

3. Long service life.

Fourth, high brightness, low heat.

5. Environmental protection.

Sixth, sturdy and durable.

7. Changeable.

8. Advanced technology.

Let's take a look at LEDs

1. Light-emitting diodes are referred to as LEDs. It is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc.

2. When electrons and holes are recombined, visible light can be emitted, so it can be used to make light-emitting diodes. It is used as an indicator light in circuits and instruments, or as a text or numeric display. Gallium arsenide diodes glow red, gallium phosphide diodes glow green, silicon carbide diodes glow yellow, and gallium nitride diodes glow blue.

Due to its chemical properties, it is divided into organic light-emitting diode (OLED) and inorganic light-emitting diode (LED).

High-power LED is an integrated chip, and its brightness is dozens or even hundreds of times higher than that of ordinary LED lamp beads. This kind of high-power LED is generally used in LED landscape lights, underwater lights, LED street lights, LED ceiling lights and other applications. It has the advantages of high brightness and energy saving.

High-power LEDs are light-emitting diodes with a high rated operating current. The power of ordinary LEDs is generally 20mA, while high-power LEDs can reach 1W, 2W, or even tens of watts, and the working current can range from tens of milliamperes to hundreds of milliamps.

The intrinsic characteristics of LED determine that it is the most ideal light source to replace the traditional light source, and it has a wide range of uses.

First, the size is small.

Brother, I am doing LEDs and have been working in this industry for 11 years.

Your question is too big, how can you say it?

To put it simply: LED is a solid-state semiconductor light-emitting device, which has no pollution and is the third generation of lighting source in the world today. At present, the wall-plug efficiency is close to 28%, which is the highest among the known luminescent materials.

Disadvantages: high cost, not heat-resistant (the maximum junction temperature is generally only allowed to 125-150 degrees).

Advantages: energy saving and environmental protection, life span of more than 20,000 hours (depending on the use environment), LED raw materials have no mercury and other highly polluting ingredients, no damage to nature, brightness is higher than ordinary energy-saving lamps.

Disadvantages: expensive, high calorific value, the drive power supply is a dead hole in the life of LED lights, mainly because the capacitor in the power supply has a short service life.

Small size, low energy consumption, large brightness, wide use, fast response.

Small size, high light efficiency, long life, light attenuation, energy saving, low carbon, environmental protection,。。

LED lighting is a big trend in lighting, but there are still some areas that need to be improved:

LED heat dissipation problem, the temperature resistance of LED chips is relatively weak, and long-term work in a high temperature environment will accelerate light decay.

The energy consumption of LED power supply is relatively large. LED is a new product of energy saving and environmental protection, but its power supply is relatively large in its own loss.

LED packaging technology, LED chips are relatively fragile and cannot work in a humid environment, and the packaging requirements are very high.

The light distribution of LED needs to be improved, and compared with the tradition, the light-emitting surface is smaller, especially for road and tunnel lighting, which can not meet the requirements.

The luminous flux of LED needs to be improved, LED will lose the chip in the package, and the luminous flux in the finished lamp is not high enough, and there is still a certain gap between the special ratio and the traditional high-voltage halogen lamp (metal halide lamp, sodium lamp).

It's a bit of a lot, but for now, the downside is that it's more expensive!

However, as the process matures, it will gradually replace the ordinary LCD!

It's more expensive, I'm afraid that the heat dissipation is not good!!

The voltage volts are the same, but the power consumption (that is, the power consumption) is different, and the larger the power consumption, the brighter.

The advantages of LED lights are good environmental protection, long life and changeable; The disadvantages are poor heat dissipation, low point-saving performance, high purchase cost, and strong directionality of the light source.

1. Advantages: good environmental protection: it is a new type of green light source, with better environmental protection benefits, no ultraviolet and infrared rays in the spectrum, and the waste can also be used, no pollution, no mercury elements, safe to touch, and a typical green lighting source.

At the same time, LED uses a cold light source, with little glare and no radiation.

Long life: LED is a solid cold light source, epoxy resin encapsulation, anti-vibration, there is no loose part in the lamp body, there is no filament luminous easy burning, thermal deposition, light decay and other shortcomings, the service life can reach 60,000-100,000 hours, which is more than 10 times the service life of the traditional light source.

Multi-transformation: The light color of the LED combination is varied, which can realize a variety of dynamic change effects and various images.

2. Disadvantages. Pay attention to heat dissipation, if the heat dissipation is poor, it will greatly shorten the life.

Low-end LED lights are less power-efficient than energy-saving lights.

The initial purchase cost is high.

Due to the strong directionality of LED light source, the special optical characteristics of LED need to be considered in the design of lamps.

What is LED?

LEDs are called"Light-emitting diodes"of semiconductors, the name is taken to"light emitting diode"initials.

In 1993, a high-brightness blue LED based on gallium nitride was commercialized, followed by the manufacture of a white LED, which attracted attention as a fourth illumination source.

LEDs are made by combining n-(-negative) semiconductors with a lot of electrons (negatively) and p(+positive) semiconductors with many holes (positively charged).

When a forward voltage is applied to the semiconductor, the electrons and holes move and recombine at the junction, and the recombined energy is converted into light.

Compared to conventional light sources, which convert electrical energy into heat and then light, light can be obtained efficiently without wasting light energy because it can directly convert electrical energy into light energy.