Understand LED "brightness": light intensity, luminous flux, nits, have you distinguished these conc

When purchasing LED lamps or display products, whether brightness is sufficient is the primary consideration for most people. However, in the field of LEDs, brightness is not a single indicator. In different application scenarios, it may correspond to different concepts such as light intensity, luminous flux, and nits. What are the key to purchasing behind these confusing brightness terms? One article will help you sort it out.

01 Brightness in optical design: Light intensity (unit: Candela cd)

Light flux emitted by a light source in a specific direction within a unit solid angle

The core definition of light intensity (unit: candela cd, commonly used millicandela mcd, 1mcd=10 ³cd) measures, to put it bluntly, how bright the light source is in a certain direction. The higher the value, the stronger the brightness of the light source in that direction and the farther the propagation distance.

When purchasing outdoor LED displays in a typical scene shopping mall, you can often see a single point brightness mark in the parameter table, such as R:500-800mcd, G:1800-2500mcd, and B:400-700mcd. The mcd here is the unit of light intensity. Outdoor screens need to cope with long-distance viewing and strong light environments, and need to accurately control the intensity of RGB three-color light to ensure clear and balanced pictures.

Guoxing Optoelectronics Technology Application In response to the needs of outdoor LED high-brightness display, Guoxing Optoelectronics independently develops and develops all-bright RS-2727 series products. The three-color light intensity parameters of a single LED device are: red light (R)1000-1500mcd, green light (G)1800-2500mcd, and blue light (B)300-800mcd. By optimizing the ratio of three-color light, the product achieves accurate color reproduction; with the upgraded packaging process, color consistency is further improved, ensuring picture clarity regardless of distance and different viewing angles. At the same time, this series also has high reliability and low power consumption characteristics, providing energy-saving and efficient display solutions for outdoor advertising screens, large screens in sports venues and other scenarios.

02 Brightness in lamp design: luminous flux (unit: lumen lm)

The total amount of light emitted by a light source per unit of time

The core definition of luminous flux (unit: lumen lm) refers to how much light the light source can emit in total. On the premise that the optical design (light distribution method) of the lamp is the same, the higher the lumen value, the wider the lighting range of the lamp and the stronger the overall brightness.

When a typical shopping mall renovates the intelligent lighting system, evaluating the parameters of LED lamps will see the label of luminous flux: 1800 2100lm. For ceiling lights, downlights and other lighting fixtures, luminous flux is the core indicator to determine whether it is bright enough. At the same installation height, a 2100lm fixture will illuminate a larger area than a 1800lm fixture.

Guoxing Optoelectronics technology applications are aimed at commercial, industrial, outdoor and other lighting scenes with high requirements for brightness and energy conservation. Guoxing Optoelectronics launches a series of high-efficiency LED devices. The maximum light efficiency of a single device in this series reaches 250lm/W(lumens per watt, that is, 250 lumens of light flux can be generated for every watt of electricity consumed), which achieves high brightness while significantly reducing energy consumption. In addition, the device has excellent light decay control capabilities. The L70 life (the time for the light flux to decay to 70% of the initial value) exceeds 100,000 hours, and the L90 life (the time for decay to 90%) exceeds 36,000 hours. It can maintain stable lighting for a long time. Effect, suitable for long-term use scenarios such as supermarkets, factory floors, and street lights.

03 Brightness in display device: nit (unit: nit, that is, cd/m²)

The brightness of the light-emitting surface of the display device in the vertical direction

The core definition of nit (1nit=1cd/m²) measures how bright the screen itself is. For display products such as TVs, monitors, and mobile phone screens, the nit value directly determines that the higher the visibility value in strong light environments, the more resistant the screen is to ambient light interference, and it is not easy to turn white when viewed during the day.

When purchasing a TV in typical scenarios, merchants often recommend Mini LED TVs with a peak brightness of 1000nit. It is precisely because the high brightness of 1000nit can cope with natural indoor light during the day. Combined with local dimming technology, it can also make the contrast between light and dark on the screen clearer, and the details of the dark parts are not lost and the bright parts are not exposed.

Guoxing Optoelectronics technology applications focus on the visual experience of high-end display terminals. The Mini LED backlight module developed by Guoxing Optoelectronics has a brightness of 1000nit and is suitable for TVs, car central control and other products. The module supports precise local dimming, which can independently control the brightness of different areas of the screen, greatly improving the contrast of the screen, making the dark field purer, the bright field more transparent, and the detail restoration more delicate.

In the future, Guoxing Optoelectronics will continue to practice the business philosophy of Guangsheng Holding Group FAITH, focus on technological innovation, and deepen the LED field. From outdoor display to indoor lighting, from home TV to car screens, it will use better products to bring bright and precise light experience.