Khái niệm cơ bản về chiếu sáng LED

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Hiểu chỉ số kết xuất màu với đèn LED

Thời gian: 2020-04 16-

When it comes to the quality of different light sources, the color rendering index (CRI) is an indicator of measurement, and it is necessary to pay attention to CRI when selecting and using light sources.


Sau đây chúng tôi sẽ giới thiệu sơ qua để giúp bạn hiểu rõ hơn về khái niệm hoàn màu.


Màu


What is color? Actually, no object itself has color.

Even the most colorful objects will lose the color if in a completely dark environment.


Therefore, if an object is dependent upon light for color, color must be a property of light. The mixing of light of different wavelengths usually causes different sensations of color.


For example, when the optical radiation entering the eye-brain system is dominated by longer wavelengths (above 620 nm), red color appears.


* When most of the optical radiation is at an middle wavelength (around 530 nm), it will appear green.

* When the optical radiation is controlled by a shorter wavelength (about 450 nm), a blue color will appear.

* Mixtures of long and medium wavelengths may appear yellow, and mixtures of short and long wavelengths may appear magenta.


Contrary to observing the experience of viewing objects reflecting and scattering incident light, this helps to distinguish the color experience that occurs when a person directly looks at the light source.



Chỉ số tạo màu


Color Rendering Index, also called as CRI, is a measurement of the ability of color renditions. It is rated on a scale from 1-100. The lower the CRI rating, the less accurate colors will be reproduced.


Đối với các dự án chiếu sáng danh nghĩa, phạm vi CRI ngoài trời là RA70 đến RA80, trong khi CRI trong nhà là RA85 đến RA90. Nhưng đối với những nơi đặc biệt, chẳng hạn như phòng trưng bày, xưởng in hoặc bất kỳ nơi nào yêu cầu hiển thị màu cao, chỉ số CRI có thể đạt RA95 đến RA98 trở lên.


Đôi khi đèn sẽ nói dối. Màu sắc của các vật thể ngoài trời khác với trong nhà. Đó là bởi vì ánh sáng có khả năng khác nhau trong việc thể hiện màu sắc.



sự so sánh


In LED Lamps, CRI is associated with the phosphor with which the LEDs are made. To obtain a higher level of CRI, you need higher quality and higher prices, so few manufacturers use values above 90 to maintain Lower price and competitiveness.


If you take a look at cheap LEDs, you will find a big difference. There are many areas in the color spectrum that do not render the light correctly. This is very likely to cause strange tones in skin tones or other color casts in the image, which is unexpected, undesirable and uncontrollable.


The maximum CRI that can be achieved in LED lamps is CRI 98, which is applied in museums, art galleries, clothing stores, Supermarkets cosmetics, and other applications that need high-quality colors.



LED light sources


Who has the best lighting color performance? sunlight, which is defined as CRI100.


Natural daylight contains all colors in the visible spectrum, plus the power or energy level of each color of light is almost uniform throughout the spectrum.


In general, any light source with a CRI rating of 90 or higher will faithfully display color. Most high-quality tungsten sources will have a CRI rating of 90 or higher (usually over 95). Sunshine will be the best of all CRI levels.


In addition to daylight, how to achieve the best lighting color performance? The answer is to have a light source with a complete lighting spectrum and continuous lighting.


To achieve the goal, we have made LED light source at any other light spectrum what ever visible or invisible.



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