When two projectors, one rated at lumens and the other rated at , are projected side-by-side, it is difficult to see a difference in brightness. Comparing a lumen unit to an lumen unit, there may be a small difference in apparent luminosity, but most viewers would not consider it to be a difference worth paying a premium for. In this category, most of the products rated , , or even up to , will have roughly the same apparent brightness when compared with one another.
Most of the products rated to lumens will also look about the same. However, those rated to lumens will produce noticeably brighter pictures than those in the to range. A lamp will generally degrade to about half of its original light output over the course of its life.
So a ANSI lumen projector will probably average no more than to lumens over its life unless you change the lamp frequently. Analyzing the tables, one might notice the one constant between them: ANSI brightness. The reason why this is, is due to how each brightness measure is defined. Based on these definitions, the reason why ANSI brightness acts as the standard for measuring brightness as shown in the tables above becomes more apparent.
This is because ANSI brightness, as indicated in its name, is the only brightness measure which uses a standard, scientific methodology that is certified by an international body. Founded in , the Institute works in close collaboration with stakeholders from industry and government to identify and develop standards- and conformance-based solutions to national and global priorities.
How does each of these units stack up against each other, and is there a preferred unit to use? Energy saving, cool, compact, light, and long lasting LEDs have begun to replace lamps in portable projectors. As technology improves, enthusiasts and professionals benefit from big screen experiences everywhere. What you need to know about throw distance and ambient lighting? Typically expressed in lumens or ANSI lumens, brightness specification is an important reference when selecting a projector.
However, the practical meaning of projector brightness and how to choose a projector for your specific installation needs can be confusing. The following information will help you understand the relationship between brightness and projection effect, as well as application. What are lumens, lux, foot-lamberts, nits, and ANSI lumens? What is light output lumens vs. How to choose the right projector? Good portable projectors offer at least lumens, preferably using LED technology. The information contained on the Website is for general information purposes only.
The Company assumes no responsibility for errors or omissions in the contents of the Service. In no event shall the Company be liable for any special, direct, indirect, consequential, or incidental damages or any damages whatsoever, whether in an action of contract, negligence or other tort, arising out of or in connection with the use of the Website or the contents of the Website.
The Company reserves the right to make additions, deletions, or modifications to the contents on the Website at any time without prior notice.
0コメント