About several brightness concepts of the projector

ANSI lumens: lumens is a measure of the projector's brightness, referring to the brightness of light emitted from the projector;

The specific measurement method is:

One: The distance between the projector and the screen is 2.4 meters;

Second: The curtain is 60 inches;

Three: Measure the illuminance at each of the nine cross points of the screen "Tian" shape using the illuminance meter, and obtain the average illuminance at 9 points;

Four: The average illumination multiplied by the projection screen area is ANSI lumens.

ANSI lumens 9-point test

ISO lumens: It is an international standardization organization. It has detailed testing standards for brightness detection.

Most of the ANSI standards are projection devices that have appeared in Europe and the United States, but in recent years, the occurrence rate among Japanese manufacturers has also increased.

Problems with projector brightness

The volume of traditional projectors is generally very large. The high-pressure lamps in the interior have high brightness, large power consumption, and high heat generation, and sufficient space is reserved for heat dissipation. Therefore, it is difficult to build equipment.

At present, the basic micro-projection is LED light source, brightness will be insufficient compared to the light bulb, and because the LED light emitting unit is dispersedly arranged, the light source concentration is relatively low, so the more common micro-projection brightness from dozens of lumens to the present Thousands of lumens, its volume is also increasing.

The size of the chip not only limits the resolution but also affects the brightness, as shown in the table above.

The 0.45-inch chip is currently the mainstream of high-end micro-projection, with a resolution of 1280×800. The price of a projector using this chip is about 3,000 yuan.

What is the performance of ultra-luxury brightness?

Although the brightness of micro-projection is already high enough, there is not much problem in the daytime, but if you want to achieve better viewing results, you must certainly do a basic shading work. In the bright light environment, 200 ANSI lumens and 1000 ANSI lumens are also effective. There is not much difference, but in the low-light environment, the advantages brought by higher brightness are obvious.