Why should I use a projector?
First of all, projectors are the least harmful to the eyes compared to cell phones, iPads, and TVs. Nowadays, children cannot avoid electronic screens, children need to watch cartoons, older children need internet lessons, and using a projector is also a disguised way to protect children's eyes.
Secondly, projectors can easily put up a large screen, and a few hundred knives can put up to 300 inches of screen, which is not possible with a TV. Also, if you want to create a home video room in your home, a projector is better than a TV.
Projector's Key Points For Selection
- Imaging Chip
- Light Source
- Throw Ratio
- Keystone correction and lens shift
There are currently three types of chips used in mainstream home projectors: 3LCD, DLP, and LCoS.
3LCD: The color of the screen is good, but the response speed is average and the lifespan is short. There is also a single-chip LCD with poor picture quality, which is mainly used in low-end machines.
DLP: fast response, long life, small size, but average contrast and detail expression.
LCoS: The best of the three chips, often used in Sony's mid-to-high-end models.
In addition to the type of chip, you should also pay attention to the size of the chip. The larger the chip size, the better the picture quality, and of course the higher the price.
There are three common projector light sources: bulb (Lamp), LED, laser .
Lamp: 3000 to 4000 hours lifespan with high brightness.
LED: The bulb life is up to 20000 hours, better than bulbs in color control, and less noise, energy saving, but low brightness.
Laser: Better brightness and contrast than other light sources, no bulbs required, no follow-up costs.
The brightness of the projector needs to refer to the ANSI Lumen value. In general.
A projector with 1000 lumens is sufficient if it is nighttime or in a light-free environment.
If there is a light source, a minimum of 1500 lumens is required.
If there is a strong light source, you will need 3000 lumens or more.
As a home projector, if you want to use it during the day, you need at least 2000 lumens or more.
The resolution of the home projector will generally be 720P, 1080P, and 4K. Generally, home projectors will choose 1080P resolution, compared to 720P, 1080P is clearer, a better viewing experience; 4K resolution usually with a laser light source, appears in high-end models, compared to 1080P, although the image quality has improved, the current 4K source is not as easy to obtain 1080P source.
When referring to the resolution, be sure to see whether the resolution indicated by the business is a Native Resolution or a Supported Resolution. The native resolution refers to the true 1080P, that is, the pixels are 1920 x 1080, while the compatible resolution refers to the actual resolution that is not high, but can be compressed to the actual resolution of the high-resolution sources after playing, many of the projectors on the market around a hundred dollars claimed 1080P resolution is almost all compatible resolution.
The projection ratio is the ratio of the projection distance to the width of the projected image when the projector imaging is clear, usually the projection ratio of home projectors is between 1.5-1.9, the smaller the projection ratio, the larger the projected image at the same distance. Assuming a throw ratio of 1.5, this means that the projector is 1.5 meters from the wall and can project a 1 meter long picture. A projection ratio of less than 1 is known as a short focal length lens, which is ideal for small homes.
Contrast ratio is the ratio between the white and black of the screen, is the most important factor to measure the quality of the image, the higher the contrast ratio, the richer the image level, the stronger the color expression.
Keystone correction and lens shift
Keystone Correction" and "Lens Shift". When the projector is not perfectly square to the screen, the projected image will become trapezoidal. Some models add a lens shift function to eliminate shadows, which can be corrected by adjusting the lens angle. Almost all home projectors currently have keystone correction, but lens shift is still mainly used in high-end models.
3D compatible、Wireless connectivity、multiple devices.