What are the characteristics of chip LED beads?

Release Date:

2022-03-12

　　Surface-mount LED chips (also known as SMD LEDs) are simple lighting devices in which electric current passes through a compound semiconductor, causing electrons and holes to recombine and release excess energy in the form of light, thereby producing illumination.

　　

SMD LED chip

 

　　What are the characteristics of chip LED beads?

　　The luminescence mechanism does not rely on heating or electrical discharge; rather, it is a form of cold light emission. Consequently, the service life of its components is approximately 50 to 100 times longer than that of tungsten filament bulbs—about 100,000 hours.

　　Without a warm-up period, the lighting response time is faster than that of conventional electric lamps (approximately 3 to 400 ns).

　　High electro-optical conversion efficiency and low power consumption—saving approximately 1/3 to 1/20 of the energy compared with incandescent bulbs. SMD LED chip

　　Earthquake resistance, reliability, and low system operating costs.

　　Small in size, thin, lightweight, with no shape constraints, and easy to fabricate for a wide range of applications.

　　What is the light-emitting principle of surface-mount LED chips?

　　The built-in potential of a PN junction creates a potential barrier. When a forward bias is applied, the majority carriers in the P and N regions diffuse into the opposite region. Because the electron mobility is much higher than the hole mobility, a large number of electrons diffuse into the P region, effectively injecting minority carriers into the P region. These electrons then recombine with the holes in the P region, and the energy released during recombination is emitted as light. This is the principle behind light emission in a PN junction.

　　What are the selection tips for chip LED beads?

　　1. Brightness: LED brightness varies, and so does the price. LEDs used in LED lighting must comply with laser safety classification standards.

　　2. Antistatic Performance: LEDs with strong antistatic properties have a longer service life and therefore command a higher price. Generally, LEDs with an antistatic rating of over 700 V are suitable for LED lighting applications.

　　3. LEDs with consistent wavelengths deliver consistent color; if color consistency is required, the price will be higher. Manufacturers without LED spectrometers find it difficult to produce products with pure, uniform colors. SMD LED chip

　　4. Leakage current: An LED is a unidirectional light-emitting device; if reverse current flows, it is referred to as leakage. LEDs with high leakage current have a short lifespan and are low-priced.

　　5. LED luminous angles vary depending on the application; different luminous angles correspond to different applications. Specialized luminous angles tend to be more expensive—for example, those with a fully diffused beam angle are relatively costly.

　　6. The key to differing quality of life is lifespan, which is determined by the rate of light degradation. Mild degradation results in a longer lifespan, and a longer lifespan comes with a higher price.

　　7. The cost of LED chips varies significantly depending on the chip type and manufacturer. Chips from Japan and the United States tend to be more expensive, while chips made in Taiwan and domestically produced chips are generally less costly than their Japanese and American counterparts.

　　8. Chip Size: Chip size is expressed in terms of edge length; larger-chip LEDs generally offer better quality than smaller-chip LEDs. Price is directly proportional to chip size. SMD LED lamp beads.

　　9. The encapsulant used in standard LEDs is typically epoxy resin. LEDs formulated with UV stabilizers and flame retardants are more expensive, as high-quality outdoor LED lighting must be resistant to UV radiation and meet stringent fire safety requirements.

　　LEDs, also known as semiconductor light-emitting diodes, are fabricated from semiconductor materials and directly convert electrical energy into light—essentially transforming electricity into optical signals. They boast numerous advantages, including low power consumption, high brightness, vibrant colors, strong resistance to vibration, long service life (typically 80,000 to 100,000 hours of continuous operation), and cool light emission, making them a truly “green” lighting solution. In the 21st century, decorative products that use LEDs as their light source are poised to replace traditional incandescent lamps, ushering in another revolutionary shift in human illumination.

More information

What is a light-emitting diode?

Light-emitting diodes are commonly referred to as LED beads. They are used in a wide range of applications and can be seen on streets and in alleys everywhere. For example, traffic lights at intersections remind people to obey traffic rules; remote controls transmit or receive signals; they can be used to display images on ultra-large screens; and various streetlights provide warm illumination at night. Even everyday household appliances rely on their contributions.

What are the tips for selecting LED chips?

1. Brightness: LED brightness varies, and so does the price. LEDs used in LED lighting must comply with laser safety classification standards.

What factors influence the price differences of LED light beads?

LED chips are a well-known product in the LED industry; however, many people are less familiar with their pricing. What causes such wide variations in LED chip prices? Below, we will outline the factors that influence LED chip prices.

What is the light-emitting principle of LED chips?

An LED chip is a light-emitting diode, and an LED bulb is simply the common, colloquial term for an LED.

Are you familiar with full-color LED chip-on-board modules for side mounting?

The brightness of full-color LED surface-mount devices is closely related to the LED’s viewing angle. The narrower the viewing angle, the higher the brightness; moreover, differences in manufacturing processes can lead to significant variations in service life. For a 5-mm LED with a 180-degree viewing angle, the white-light luminous intensity is only a few hundred mcd, whereas for a 15-degree viewing-angle LED, the luminous intensity exceeds 10,000 mcd. When high-power LEDs are used outdoors, the brightness is even greater. Single-power LEDs include 1 W, 3 W, and 5 W models; some high-power LEDs can be combined to form a single high-power LED with output up to several hundred watts. Color temperature is independent of brightness, but brightness is directly related to the lumen value.

Key Considerations for Full-Color SMD LEDs on the Side

Side-view full-color LED chips, also known as surface-mount LEDs, are a type of simple lighting device. Their light-emitting principle is based on passing an electric current through a compound semiconductor; when electrons and holes recombine, the excess energy is released in the form of light, thereby producing illumination.