It must be mentioned here that before choosing a suitable projection screen, you must consult the projector manufacturer whether the projection distance is suitable for your family environment, so as to determine the maximum projection size. Of course, it can also be calculated by the length, width and height parameters of the room and the projection ratio of the projector. Projection ratio = projection distance/screen width. According to the farthest distance and projection ratio in actual use, the maximum projection screen size that can be used can be calculated.

The maximum suitable projection size can be calculated by the length, width and height parameters of the room and the projection ratio of the projector.

Many institutions at home and abroad have certain standards for the best projection size. We suggest that you can simply determine the relationship between the projection screen and the viewing distance according to your usual viewing habits in the cinema. For example, if you like to sit in the back row and watch Friends, you can simply estimate the ratio of the viewing distance of the cinema to the width of the projection screen, so that you can apply it in your own home without using complicated mathematical formulas. In fact, the home theater was established to bring home the shocking audio-visual experience in the theater.

The relationship between projection screen and viewing distance can be determined simply according to the usual viewing habits in cinemas.

In order to establish a home theater system in the living room, it is necessary to consider the influence of ambient light on the picture. For projectors with low output brightness, it is necessary to use gain curtains with reflection angles to improve the picture details and color reproduction. In terms of optical characteristics, home theater projection screens can also be divided into three categories: diffuse reflection, retroreflection and ordinary reflection. Diffuse reflection curtain can irregularly reflect incident light from multiple angles, with a wide viewing angle. It belongs to a curtain without gain and is suitable for various installation methods, including suspended ceiling and horizontal installation. Regression and reflection curtains belong to curtains with gain, and there are many places to pay attention to in use.

The regression screen is only suitable for horizontal projection.

Reflective curtains must choose the projection mode of ceiling or ground according to the size of refraction angle.

The regression screen reflects the incident light to the direction of the projector, and there is no included angle between the incident light and the reflected light, so it is only suitable for horizontal projection, such as the front and rear projection of the seat. The reflection screen will have a certain refraction angle after the incident light is projected on the projection screen, so the horizontal projection mode cannot be adopted, and the projection mode of ceiling or landing must be selected according to the refraction angle.

When you build a living room cinema, you should install it according to the characteristics of the projection screen. At the same time, it is necessary to consider the actual environment at home, choose ceiling installation, horizontal installation directly on the desktop, or even hidden installation in the wall. In some extreme cases, such as users with long room volume and serious ambient light interference, it will be more ideal to choose the rear projection method.

Using the 2.35: 1 projection screen, you can get a viewing experience closer to the cinema.

If you are a user who often watches ordinary standard definition TV, a 4:3 projection screen is also a good choice.

According to the display ratio, the projection screen of home theater can be divided into 16:9, 4:3 and 2.35: 1. 16:9 is the standard display specification for HDTV and IMAX movies at present, and it is also the chip display specification for home theater projectors, so most home theater projection screens adopt the specification of 16:9. The display specification of standard definition TV is 4:3. 4:3 projection screen is also a good choice for users who often watch ordinary standard definition TV. The projection screen of 2.35: 1 is mainly designed for fans who like watching movies such as 2.35: 1 or 2.40: 1. The room environment is an important factor to measure which scale projection screen you use. If your room is flat and long, the projection screen with a ratio of 2.35: 1 can have a higher utilization rate. If it is tall and narrow, you may choose a 4:3 projection screen.

The installation of the projector must avoid trapezoidal distortion of the projection picture.

Tips: Types of projection screens in home theaters

At present, mainstream home theater projection screens are classified according to screen materials, including textiles, plastics and metals. Textiles and plastics belong to the same category, and are divided into white curtains and gray curtains according to the different colors of curtain materials. White screen can be subdivided into two types: matte white with low gain and glass beaded with high gain. The white plastic screen has accurate color reproduction ability, which can fully express the color reflected by the projector itself and will not change the performance of the projector's black-and-white transition. Gray curtain is an improved curtain material on the basis of white curtain, which can absorb more ambient light, thus making the black position on the projection screen more stereoscopic and widening the gap between black and white, thus achieving the purpose of improving contrast. However, the gray curtain material will change the performance of other colors, with a certain degree of color dyeing. Metal screen is a projection screen completely used in harsh environment, which can obtain good color and detail performance in dark or bright environment.

More advanced and perfect display effects, as well as double white soft screens and microporous sound-transmitting screens that have appeared in home theaters and video bars in recent years.

Double white soft screen is the leader and flagship role in the field of HD and 4K projection screen, which has finer lines, wider visual range and color reproduction than white plastic and fiberglass.

Compared with the woven sound-permeable curtain, the microporous sound-permeable curtain has a more perfect display effect, and the sound transmission rate is also maintained at an excellent level, so it is the first choice for large-size curtain fabrics in private cinemas.

16:9 is the most common projection display specification in home theaters at present.

In the installation process, trapezoidal distortion of the projected picture must be avoided. After all, using trapezoidal distortion function inside the projector will affect the color and details of the projected picture, reduce the resolution, and thus affect the whole projection effect. No matter which installation method is adopted, it is necessary to aim the lens of the projector at the central axis of the projection screen. Special attention should be paid to the level of the projector, and qualified users had better use an accurate level meter for calibration. Although the lens shift function will not affect the distortion of the projection picture, it will lead to the decrease of the output brightness, so it is suggested that you try to adjust the projection picture by physically adjusting it up or down.

Try to use the function of lens displacement to adjust the position of the picture, but be careful not to adjust the range too much, otherwise you will lose the energy sense of the picture.

When installing the projector, you need to pay special attention to whether the overscan function is turned on by default. The overscan function was originally an enhanced display function of analog video signals, which cut out images with an area less than 100% from the original images and enlarged them to full screen. In the era of digital display, this function will not only enhance the picture effect, but also lead to the point-to-point display of 1080p full HD signals, which seriously affects the imaging quality, so the overscan function must be turned off.

Turning on overscan will seriously affect the resolution of the picture, resulting in point-to-point display of the picture.

In addition, for some audio-visual enthusiasts who have higher requirements, they may consider using a projection screen of 2.35: 1, and at this time, it is necessary to consider whether it is necessary to match the anamorphic lens of 2.35: 1. The biggest advantage of using 2.35: 1 anamorphic lens is that all the pixels of the projector are reserved, and the wide-screen display without black edges is realized, but the disadvantage is that the brightness and sharpness of some pictures will be lost, and even the edges of the pictures will be deformed. If the projector does not have a built-in distortion expansion mode, then a pixel expander is needed to fill the distorted and expanded picture, so that the picture proportion will not be distorted.

Using the 2.35: 1 anamorphic lens, all pixels of the projector can be preserved, and the widescreen display without black edges can be realized.