More important reason: the life of cheap light bulbs used in cheap machines is as short as 1/3. Think about how much thousands of light bulbs cost. Do you know that machines are cheap?
Reprinted from the forum
The first two third-rate brands ASK (American investment god) and Proxima (Yum! ) and Fushi merge. At present, the product line of the same company covers high and low end. InfoVision focuses on portable market products and allows patents to hold NEC stream brand as high-end brand and Barco brand.
3m, Epson, Panasonic, Philips, Toshiba and Mitsubishi are basically low-end products with the characteristics of low price. Sony products have poor functions and performance, and Acer, Lenovo and other cheap goods are available.
Brand selection should consider choosing DLP technology, LCD technology, and machine DLP is characterized by high brightness and high color purity, which is suitable for business diagram demonstration and poor brightness uniformity (DVDVCD) of playing images, and it is cheaper than lumen machine DLP, and the performance of LCD machine is more comprehensive. CCD machines need high brightness, and high-brightness LCD machines are more expensive.
In addition, we should consider the portable conference room, which has few functions, low brightness and high price. To consider the brightness problem, choose 2000 lumens, it is difficult to draw curtains, turn off the lights, and match with a high-brightness reflective screen. The brightness of the demonstration site is terrible.
Pay attention to whether the machine has trapezoidal correction. More importantly, it is necessary to find a professional to equip a vertical screen or even a wall with a special screen projection scroll with an inclined angle.