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

Release Date:

2021-11-15

　　Are you familiar with full-color LED chip-on-board on the side?

　　

Side full-color LED chip

 

　　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 unit with output powers reaching several hundred watts. Color temperature is independent of brightness, but brightness is directly related to the lumen value.

　　Let’s take a look at several related concepts regarding side-mounted full-color LED chips:

　　(1) Brightness (cd/m²).

　　Luminance is the intensity of light emitted by a surface as perceived by the eye from a particular direction. Its unit is candela per square meter [cd/m²], and it is denoted by the symbol l, representing the luminous flux emitted by a luminous sample per unit area within a unit solid angle in a specific direction—equivalent to a luminous intensity of 1 candela on a 1-square-meter surface.

　　(2) Luminous intensity (cd) of the full-color LED chip on the side.

　　Luminous flux is the total amount of light energy emitted by a light source into the surrounding space. The spatial distribution of luminous flux varies depending on the light source. The unit of luminous intensity is the candela, symbolized as cd, which represents the luminous flux emitted by a light source within a unit solid angle (the angle formed between the surface of an object and a point light source). One candela equals one milliradian per steradian (the SI unit of solid angle).

　　(3) Luminous flux (m)

　　Because the human eye has varying sensitivity to electromagnetic waves of different wavelengths, we cannot directly measure light energy by referring to the radiant power or luminous flux of a light source; instead, we must use the unit of luminous flux, which is based on the human eye’s perception of light. Luminous flux is denoted by the symbol Φ and its unit is the lumen (lm).

　　(4) Brightening performance of full-color LED chip-on-board on the side.

　　In principle, artificial light should match natural light so that the human eye can accurately distinguish the colors of objects. Of course, this depends on the positioning and intended use of the lighting. The extent to which a light source renders the colors of objects is known as color rendering, commonly referred to as the Color Rendering Index (Ra). Color rendering describes the relationship between an object’s true color (its intrinsic color) and the color it appears to have under a given standard light source. The Ra value is determined by comparing eight test colors defined in the DIN 6169 standard with the test light source; the smaller the color difference, the better the color rendering of the test light source.

　　In a simple series configuration, full-color LED chips are connected end-to-end, with the same current flowing through each LED during operation. Although individual LEDs of the same specification and batch may exhibit slight variations in forward voltage, their current-driven nature ensures consistent luminous intensity. Consequently, this straightforward series connection offers the advantages of circuit simplicity and ease of wiring. However, because the LEDs are connected in series, a single open-circuit failure in one LED will cause the entire string to go dark, thereby compromising operational reliability.

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.