Lumens or Nittel's Core Criteria for Resolving Laser TVs

The current price of laser television is relatively high, but the number of people who can't stop watching is high. The advantages of its large-screen LCD TV abuse, but at the same time there are many people still do not understand the purchase of laser TV in the end should see which core indicators? Today we will talk about this issue.
Brightness performance to be lumen or want to Nite

Brightness can be said to be the most important for a laser television. At present, there are two kinds of units for the brightness of laser televisions. One is lumens, and the other is nits. Traditional projector manufacturers are all rated for brightness in lumens, while some LCD TV brands prefer to use nits. Which kind of brightness unit should be used in the field of laser television?

Lumen (LM) is a unit of luminous flux, which represents the amount of energy of radiation light per unit time. It is generally used to measure the brightness of objects that do not emit light by themselves and reflect light. For example, a home theater projector has a brightness of 1000 lumens or more, and the lumen of a laser television is basically more than 2000 lumens.
Brightness refers to the degree of lightness and darkness of the object. This type of light can emit light, such as various light bulbs, various light sources, including television LCD screens, defined as the luminous intensity per unit area. Its unit is nit (nit), 1nit=1. Terra / square meters. At present, the brightness of many mobile phones has reached the level of more than 400 nits.
Relationship between different brightness units

What is the relationship between lumens and Nit? In fact, the relationship between the two is a light energy, one is the luminous intensity per unit area, lumens can be compared to a flashlight, if the luminous energy has been determined, the smaller the area, the higher the brightness, the larger the area Big, the brightness will be low. 1 Nt = 0.993 lumens/sq.ft. Assuming a 1000 lumen projector, the shot area is 1 square meter (more than the size of a 60-inch LCD screen), and the brightness of the projection screen you see at this time is approximately 100 nits.

It also means that the lumen of the projector is fixed, but the same projector can have different nit brightness. The smaller the screen size of the projector, the higher the nit brightness of the screen, but the brightness of the stream will not change. . Because lumens is a numerical value of the illumination multiplied by the area. With a large area, the illuminance value is low, so the result of multiplying the illuminance by the area does not change. (The projector screen cannot directly measure the lumens. Only the illuminance meter can be used to measure the illuminance, and then the final lumen value can be calculated based on the area value).

After understanding the relationship between lumens and Nit, we can understand that laser televisions should not use the unit of Nite, because laser televisions can project a variety of sizes. A laser television can project 80 inches or 100 inches. When projecting these two dimensions, the picture's Nite value is definitely different. Therefore, it is inaccurate that a laser television is labeled with Nitrate.
LCD TVs or mobile phones are different because the size of LCD TVs is fixed, so the brightness of their screens is also fixed. Although laser televisions are also equipped with fixed-size light curtains, but the same laser TV can be used with a variety of sizes of light curtains, so the nominal brightness of Nitto will still make some users confused.

In addition, according to the industry, the unit of lumens has been used to measure the brightness of objects that do not emit light and rely on reflected light. Laser television is essentially a projector, and therefore it fully complies with industry regulations. If we use the lumens to mark the brightness of LCD TVs, it is obviously not appropriate. Therefore, this product of laser television is still best known as lumens.

Consider the brightness, but also depends on the effect of the light curtain

In addition, considering the brightness of a laser television, it is not only possible to look at the brightness of the light engine but also to consider the effect of the light curtain. Laser televisions generally use specially designed anti-light curtains because laser televisions need to overcome ambient light to highlight a brighter picture. This kind of curtain adopts a special optical sawtooth structure. The black light above the sawtooth structure blocks the light-absorbing layer, and the special paint structure is underneath, which can make the projected image give true feedback and create realistic high-contrast images. Such curtains have the advantage of being resistant to ambient light and increasing the contrast.
In fact, this technical principle is also well understood. Even though the grain structure and material on the curtain are more complex, the essence of the principle is actually refracting the light coming from the obliquely below the laser television into the observer's eyes. The white wall is the effect of diffuse reflection, that is, the light below the white wall, the light is emitted around, so the brightness of the picture will be reduced, and the specially designed anti-light curtain is to focus the light to the viewer In the direction of the picture, so the brightness of the picture is higher.

Therefore, when we selected laser televisions, we watched the brightness of laser televisions. Second, whether laser televisions are equipped with professional anti-light curtains. Only high-lumen and high-quality anti-light curtains are available at the same time. This kind of laser TV product will have better brightness performance. At present, the universal brightness of laser television is more than 2,000 lumens. With the upgrade of laser light source, the future will be upgraded to 4,000 to 5,000 lumens, with the anti-light curtain, it can be said that even in the bright environment of the living room, the scene of the ordinary projector will not appear white.

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