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F.A.Q

Question What is emission angle (2θ½)? 2022-10-11 15:39:10.842
The emission angle refers to as the 2θ½ indicates how focused the light is when emitted from the LED. This angle is determined by measuring the angle from direct on-axis to the angle where light intensity falls to half of the on-axis 9 intensity, and multiplying this difference by 2. The choice of viewing angle also affects the LED output intensity. Foryard Optoelectronics LEDs are available in various emission angles.
Question What is junction temperature? 2022-10-11 15:38:58.199
A p-n junction is formed by combing N-type and P-type semiconductors together in a very close contact. The term junction refers to the region where the two types of semiconductor meet. The junction temperature refers to the temperature measured at p-n junction, which is also the core of an LED.
Question What is phosphor? 2022-10-11 15:38:45.734
Phosphor is an inorganic chemical compound processed into a powder and deposited inside the dome of an LED packaging. Phosphors are designed to convert the wavelength of light. Foryard Optoelectronics LEDs use proprietary phosphors from the global leading company.
Question What is Lumens? 2022-10-11 15:38:36.427
Lumens in an international unit that refers to the amount of light that a light source produces. For example, a 60 Watt incandescent lamp provides about 800 lumens. A 1 Watt LED provides 85 lumens and up.
Question What is forward voltage (Vf)? 2022-10-11 15:38:26.258
Forward voltage (Vf) is the voltage across a diode for a given forward current.
Question What is Bin Ranks? 2022-10-11 15:38:14.596
LEDs are sorted into different bins (groups) based on their wavelength, photometric luminous flux, or radiometric power data. Bin ranks describe the specifications of the given bins.
Question What is High Power LED? 2022-10-11 15:37:57.433
High Power LED refers to a type of LED with a driving current of 350mA and above.
Question What is LED? 2022-10-11 15:37:46.930
A lighting-emitting diode (LED) is a semiconductor device that emits incoherent narrow-spectrum light when electrically biased in the forward direction of p-n junction. The color of the emitted light depends on the composition and condition of the semiconducting material used, and can be infrared, visible, or near-ultraviolet.
Question High Color Rendering Index (CRI) 2022-10-11 15:37:34.517
Color Rendering Index or CRI is the calculated rendered color of an object. The higher the CRI (based upon a 0-100 scale), the more natural the colors appear.
Question How are white LEDs created? 2022-10-11 15:37:23.518
There are currently two ways to make white light with LEDs. One method mixes multiple wavelengths of different LEDs to make white light (i.e. RGB); allowing the lighting designer to tune the white light to a specific color temperature. The second method uses a blue Indium-Gallium-Nitride (InGaN) LED with a phosphor coating to create white light. This is the method that results in the more commonly seen “white LED”.
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