Projection Screen Gain refers to the brightness of the reflection. It measures the screen material’s reflection at all angles. This is expressed in numbers. Projection Screen Gain is an important parameter to measure the ability of the screen to reflect light. It determines the brightness of the projected image. A higher gain makes the image brighter. However, the viewing angle becomes smaller. A lower gain affects the image brightness more with ambient light. But the viewing angle becomes larger.
Definition and calculation method of gain Gain is calculated by comparing the brightness of the light reflected by the screen. This is done against the brightness of the light reflected by a completely diffuse scattering surface. A completely diffuse scattering surface has equal reflectivity in all directions. The gain of a projection screen is the ratio of the screen’s center point brightness. It is compared to the brightness of a completely diffuse scattering surface. This measurement is taken when light is projected perpendicularly to the screen under the same conditions.
Effect of gain on projection effect Brightness of the image: The higher the gain, the brighter the image. This is suitable for darker environments. However, too high a gain will cause the middle of the image to be bright. The four corners will be dark, and the high-brightness part may lose its layering. Observation angle: The higher the gain, the smaller the observation angle. This is suitable for small-scale viewing. When the gain is low, the picture is more affected by ambient light. However, the observation angle is larger, which is suitable for large-scale viewing. Ambient light influence: Low-gain screens are easily affected by ambient light. High-gain screens can resist ambient light to a certain extent. Application scenarios of different gain values High-gain screen: This is suitable for darker environments. These environments include home theaters or dark rooms. It can provide brighter pictures and better contrast. Low-gain screen: Suitable for brighter environments. These screens are ideal for daytime use. They can better resist the influence of ambient light and maintain the natural brightness of the picture.
The significance and role of projection screen gain The projection screen gain refers to the screen’s ability to reflect light. It is also one of the key factors affecting the projection effect. Generally speaking, if the gain value is higher, the screen’s reflective ability becomes stronger. This can make the projected picture brighter and clearer. When the same projector is projected on different screens, the brightness and clarity of the picture will also be different.
Usually, a low-brightness projection environment requires a screen with a higher gain. On the contrary, using a screen with a higher gain in a darker projection environment can cause “too high brightness.” “Snowflakes” will also affect the visual effect. Therefore, the projection environment should be considered when choosing a projection screen to avoid mistakes.
Factors affecting the gain of a projection screen Several factors affect the gain of a projection screen. They include the projection environment. These factors also include the brightness of the projector and the projection distance. The higher the brightness of the projector, the less important the gain of the projection screen. A screen with a higher gain can provide better projection effects when the projector brightness is low. It is also beneficial when the projection distance is far.
How to choose a suitable projection screen
Consider the projection environment
When choosing a projection screen, the first thing to consider is the projection environment. The darker the projection environment, the higher the gain required. On the contrary, for a projection environment with a higher brightness, a screen with a lower gain should be selected.
Choose the screen gain according to the brightness of the projector
The brightness of the projector is also a key factor in choosing a projection screen. Generally speaking, the brighter the projector, the more suitable the screen with a lower gain is. Conversely, when the brightness of the projector is low, a screen with a higher gain can provide better projection effects.
Choose the screen gain according to the projection distance
The projection distance will also affect the choice of projection screen. If you are very close to the projection screen, you can choose a screen with higher gain. If you are far away from the projection screen, you should use a screen with lower gain. This helps avoid the problem of excessive brightness.
In short, choosing a suitable projection screen involves comprehensive consideration of several factors. These factors include the projection environment, projector brightness, and projection distance.
Whether it is a commercial cinema or a home audio-visual room, more and more cinema projects will use perforated sound screen. First, the overall appearance is beautiful, and second, the speakers can be placed in a suitable position according to the indoor environment to achieve better sound effects.
Perforated sound screen are mainly divided into two categories: perforated sound-transmitting screen and woven sound-transmitting screen.
Perforated sound-transmitting screens are mainly based on PVC material curtains, and holes are punched on the screen surface. Woven sound-transmitting screens are just like the meaning of the text, using a weaving process.
Many cinema enthusiasts have a headache. Which of these two projector screen materials is better?
In fact, if a product can survive in the market, it means that it has a certain value, so there is no such false proposition as which is better between perforated sound-transmitting screens and woven sound-transmitting screens.
In terms of sound attenuation, woven sound-transmitting screens have an advantage over perforated sound-transmitting screens, because the holes of woven sound-transmitting screens are denser than those of perforated sound-transmitting screens, the perforation rate is higher, and the sound attenuation is lower, but this statement is based on the fact that the woven sound-transmitting screens are not added with black blackout cloth.
However, in terms of image effects, perforated acoustic screens have an advantage over woven acoustic screens, because the surface of woven acoustic screens cannot be coated with gain. If used with a low-lumen projector, a large-sized woven acoustic screen will have difficulty in producing images. This is why commercial theaters have always used perforated acoustic screens.
The narrow frame projector screen is fixed on the wall. It has a simple structure and is fixed on the outside through an aluminum frame. The screen can be used by directly flattening and straightening it. The narrow frame screen has a main feature: its border is narrow, usually about 1 cm. This design makes the screen look more spacious. It also reduces the visual interference of the border.
The advantages of the narrow frame screen are that it is easy to install and light in weight. The screen surface is flat and not easy to wrinkle. The viewing effect is good. It is suitable for most users. It is also suitable for independent audio-visual rooms. This environment is usually relatively closed. It can keep the screen surface clean.
As the role of projectors in daily life becomes increasingly prominent.more and more families are abandoning TVs and choosing projectors. However, a question that follows is whether a projector needs to buy a screen? What kind of screen should be bought? Many people think that buying a cheap screen may not be good and is not suitable for the projector.Too expensive screens are unnecessary, so they can only choose to use white walls as projection backgrounds. So, how should the right projector screen be selected? Let’s take a look at it together.
Screen properties
Anti-light properties
Resisting the influence of stray light on the picture is generally related to the texture of the screen surface and the depth of the screen color. The darker the color, the stronger the light resistance.
However, while the anti-light screen resists ambient light. it will also reduce the brightness of the projector projection, making the overall picture darker. Therefore, a screen with strong light resistance must be matched with a projection with high ANSI lumen.
Like the screen below, the left side is a white soft screen, and the right side is an anti-light screen. When the window is closed during the day,the anti-light screen is obviously darker, and the soft white screen is colorful.
However, the advantage of high contrast of anti-glare screen can be demonstrated when the window is open during the day.
Gain attribute
The screen gain can increase the brightness of the projector projected onto the screen. The higher the gain, the higher the brightness of the projector on the screen;
For example: if a projector with only 800 lumens is projected onto a screen with a gain of 2.0, the final brightness will be 1600 lumens; if it is projected onto a screen with a gain of 1.0, the final brightness will still be 800 lumens.
Most of the screens currently on the market have a gain range of 0.9-2.0.
Like the anti-glare attribute, the higher the gain, the better. If the gain is too high, the white balance of the picture will be out of balance. The reflection will be excessive. As a result, the color details will be lost. Especially for high-end audiophile projectors, the brightness is often not very high, but the contrast is much higher. If you choose an inappropriate high-gain screen, the original black level performance of the projector will be lost, and the original high contrast of the projector will not be reflected;
Viewing angle
Screens of different materials have different light resistance and gain, which will also affect the viewing angle of the picture;
Screen characteristics Currently, the most mainstream screens are fiberglass and soft white screens. They are reasonably priced and have excellent gain effects. These screens can cover the needs of 80% of users.
In contrast, matte white screens are too cheap and not suitable for home use. They are generally used in small conference rooms. If used at home, unless there is no white wall, it can replace the white wall, or the projector is too cheap and it is not worth investing more budget to buy screens, then you can also choose white plastic screens;
In addition, there are anti-light screens that meet anti-light requirements. There are acoustic screen that can better transmit sound. There are also metal screens with unique characteristics. Because of the different materials used, the price difference is large. However, in the field of screens, not the more expensive the price, the better the screen. You must remember that when buying a screen, don’t buy expensive or cheap, just buy the right one. The right price is one aspect. What’s important is to match it with the projector and the projection environment. (Read on, I believe you will feel the same way) Based on this, let’s take a look at the screens of various materials:
matte white
PVC is used as the cloth base. The middle interlayer is made of chemical fiber synthesis. The white plastic in the figure also adds a high-definition layer. Matte white is softer and cheaper than the fiberglass below.
Fiberglass fabric
A more mainstream curtain features PVC material. The bottom layer uses glass fiber weaving. Finally, it’s coated with special PVC material. Compared with matte white fabric, fiberglass is smoother and not easy to curl. The final effect is significantly higher than white wall, and the gain and contrast are improved.
Compared with soft white fabric, the upper limit of fiberglass curtain is lower. The highest-end fiberglass is not as good as soft white. Therefore, more dark audio-visual rooms choose soft white.
Soft white fabric
There are other names like: PVC,nano PVC fabric, etc., all the same.
Made of PVC material, the gain is generally around 1.1, the viewing angle can reach 160°, and the price is not expensive. It is currently the most mainstream screen;
Thanks to the extraordinary maturity of the PVC (polyvinyl chloride) industry, not only can very high-end screens be made, but also very cheap screens can be made, with high upper and lower limits, so the user audience is very wide, and high-end, medium-end and low-end users can buy it;
The basis for distinguishing the high-end of soft white screens is: the fineness of the screen surface is different. The finer the screen, the higher the picture resolution can be.
Although they are both soft white screens, the fineness of the screen surface is completely different. The price must also be very different.
Ambient light rejecting screen fabric
The common ambient light rejecting screen fabric is a crystal coating on the screen surface. It relies on its dark or gray color. The special paint coating absorbs the ambient light. This type of ARL screen fabric does not mean that the picture looks particularly bright in a very strong light environment. The main function of the ARL screen is to increase the contrast of the picture. This reduces the influence of ambient light. Compared with the non-anti-glare screen, the anti-glare screen is brighter. If you only look at the brightness, the anti-glare screen’s gain is lower than the soft white screen. It is generally a few tenths.
The ambient light rejecting screen is obviously darker when the window is closed during the day. Its color reproduction and brightness are not as good as the soft white screen. When the window is open, the soft white screen is obviously white when it is illuminated (the gain itself is high, and it will be whiter when it is illuminated. If the gain is high, the reflection will basically become white. What can you see? What color can you say? It is easy to understand this way.) The ambient light rejecting screen is different. It absorbs part of the ambient light, so the contrast and black level effects are better. Therefore, the gain of the anti-glare screen is generally <1, and the purpose is to absorb ambient light.
As we mentioned earlier, the quality of the screen’s light resistance is mainly determined by two aspects, one is that the screen has a specific texture, and the other is the depth of the surface color, which can be reflected in the following two types of ambient light rejecting screens:
they achieve light resistance through physical means, and the more typical ones are black grid screens and Fresnel screens:
The screen cross-section is serrated (see the figure below). It is designed as a black and white prism. The top is black to absorb ambient light and act as a light-resistant. You can look down at the screen and see that the screen is completely black. The bottom is white, which is mainly used to reflect the light of the projector. You can also look up at the screen and see that the screen will turn completely white.
The structure of the black grid screen can absorb the interfering light above. It plays a good light-resistant effect. The ability to resist ambient light can reach 93%. This type of horizontal anti-light structure has little effect on the visual angle. The maximum viewing angle of the black grid screen can reach 160°.
The Fresnel screen’s structure features a semicircular fan-shaped spiral. It ranges from large to small across the entire screen surface. This structure is only sensitive to the projection light below the center of the circle. It only reflects the light emitted from the projector position. When installing the projector, align the lens with the center of the circle. This alignment can gather the light within a certain range. It increases the brightness.
This structural problem makes the Fresnel screen only usable as a hard screen. In contrast, the black grid screen can be a soft screen or laminated into a hard screen. The black grid is more convenient in transportation.
The above two types of screens are mainly used for ultra-short-throw projection or laser TV. They are both relatively expensive, and Fresnel is more expensive. The characteristics of the two screens are also different:
Anti-light effect: Fresnel> black grid;
Viewing angle: black grid> Fresnel;
Fresnel screen cannot be folded and stored, black grid screen can be hard or soft, and can be made into a retractable screen;
Anti-light screen for medium and long-focus projectors:
The medium and long-focus anti-light screen achieves light absorption effect by coating the surface with a special coating;
This special coating achieves the anti-light effect of the medium and long-focus screen. It works based on the projector light and ambient light waves. Based on the principle of different lengths, it absorbs the light that meets the wavelength requirements of the ambient light, and reflects the light that meets the wavelength requirements of the projector light, completing the effect of absorbing the ambient light and reflecting the projector light, thus achieving the anti-light effect;
Finally, it is not difficult to find that no matter whether it is Fresnel, black grid anti-light screen or various medium and long focus screens, as long as it is an anti-light screen, the color of the screen is basically gray, dark gray, or even completely black. Its purpose is also to improve the contrast of the picture and make the black position effect of the picture better.
In fact, the principle is also easy to understand. The darker the screen, the more light it absorbs, and the better the black level and contrast. However, you can’t have your cake and eat it too. It will definitely absorb some of the light from the projector, so try to use a dark-colored screen with a high-brightness projector;
Silver screen
The principle of the silver screen (metal screen) is somewhat similar to the glass beaded screen. Both achieve high gain effects by gathering light to the middle, generally between 2.0 and 3.0, but the viewing angle is relatively small, and the 3D effect is better. It is generally used in theaters;
6.Acoustic screen
The biggest feature of this type of screen is that the screen has holes. For example, users who build a home theater often choose to put the speakers behind the screen in order to have a better sound field experience, so the screen with holes can better transmit sound. This type of screen is generally woven from high-density special imaging fibers, and the holes are also divided into woven holes and laser punched holes, each with its own characteristics.
7.Glass bead fabric
A kind of fabric that is almost out of use. The bottom layer is woven with textile threads and the surface is coated with glass beads. Because glass beads can reflect light (think of light shining on diamonds, sparkling, the same principle), the most notable feature is that the gain is very high and the cost is relatively low. It is generally only suitable for projections with very low lumens to meet the minimum requirement of being able to see clearly. As mentioned earlier, medium-priced projections generally do not require too high a gain. Too high a gain will only be counterproductive, and the final effect may not be as good as a white wall. It also has the disadvantages of being environmentally friendly, short life, and difficult to maintain, so it is basically out of use.
Screen size
Projector screen has too many different sizes,like 72″,84″,100″,120″,150″ etc.,you should choose a right projector screen size depended on the room and Viewing distance.
Screen format
Usually common screen format is 1:1,4:3,16:9,16:10 and 2.35:1,choose a right projector screen needs choose a right format,
1:1 and 4:3 projection screen 4:3 projection screen is the most common ratio, suitable for PPT presentations, education and training, business meetings and other occasions. Its aspect ratio is 1.33:1, which is also very suitable for some old projectors. But for the current home theater, if you choose a 4:3 ratio screen, there will be a certain black edge. If it is an HD picture, since the 4:3 ratio cannot be fully adapted, the picture will be compressed or stretched and lose its original clarity. Therefore, if you are using a projection screen to watch HD movies at home, it is not recommended to choose a 4:3 screen.
16:9 projection screen 16:9 projection screen is considered to be a high-definition ratio with an aspect ratio of 1.78:1. It is suitable for playing HD movies, live sports, games and other occasions. The 16:9 ratio screen is wider and clearer, allowing viewers to enjoy the visual effects better. For home theater enthusiasts, a 16:9 ratio screen is the best choice.
16:10 projection screen The 16:10 projection screen is a choice for business people and office workers. Its aspect ratio is 1.6:1, which is wider than 4:3 and taller than 16:9. This ratio of screen is suitable for displaying the company’s annual speech, business data and other information. Since the 16:10 ratio is more suitable for displaying documents and charts, it is more common in business occasions.
2.35:1 projection screen The 2.35:1 projection screen is also called a wide screen, which is suitable for displaying widescreen movies. Its aspect ratio is 2.35:1 or wider. This ratio of screen will present a larger picture, allowing the audience to better immerse in the world of movies.
Summary From the above content, it can be found that different types of screes have different effects. Therefore, when purchasing, you should choose a right projector screen the one that suits you. Don’t choose the screen blindly, otherwise it will not bring the best effect.
Floor rising projector screen is a projection screen,the main feature of which is that it rises from the ground.It has an automatic lifting function. This screen does not need to be mounted on the wall.It is placed on the ground or table.This screen is driven by a motor to rise from the ground, and is used for projection display after unfolding. Convenient use, beautiful and easy to store, and suitable for various environments, including home theaters and business presentations.
1.Convenient to use : Floor-lifting screens have an automatic lifting function. And users can easily operate them through remote controls or buttons, eliminating the trouble of manually pulling up traditional screens.
2.Beautiful and easy to store .When not in use, the screen can be completely stored inside the base without occupying extra space.keeping the environment clean.
3.Applicable to a variety of environments .Floor-lifting screens are suitable for a variety of environments, including home theaters, conference rooms, exhibition halls, etc., providing a large-screen visual experience.
4.No installation required, plug in and use.
5.Can be placed in a TV cabinet, more beautiful and generous.
Black crystal projector screen fabric is one of ambient light rejecting screen fabric,it’s low gain and dark gray screen surface can absord the ambient light,the gain is 0.8,
The surface is made of a unique anti-light coating that can absorb ambient light and lighting. The product has excellent light resistance. The screen has a crystal coating to enhance the brightness of the picture. It works best with a high-brightness projector.
Black crystal projector screen fabric features
structure:PVC fabric base+black crystal coating
Gain:0.8
Viewing angle:160degree
Thickness:0.31mm
Color:dark gray
Fireprofing,mould proof,antistatic and cleanable etc.
Cynthia elastic pvc projector screen fabric is made of special PVC composite material, covered with a better developing coating, it can diffuse the incident light in all directions, increase the viewing angle, develop delicate images, natural colors, and significantly improve the image quality
-Extremely light-resistant,high Contrast and high color restoration,support 3D,4K,8K ultra HD projection
Black grid ALR fabric is designed with a special structure,which consists of a black and white prism,black coating is used to adsorb ambient light and white bevel reflects the light of projector.Black grid ALR fabric presents a horizontal zigzag.This design effectively reduces ambient light interference from the top, while improving the viewing Angle to 160 degrees and can absorb 90%-95% ambient light,in daytime and highlight ambient light can still show a very good image
Gain:0.8
Viewing Angle:160degree
Thickness:0.49mm
Color:Dark Gray
Moisture -proof, fire prevention, anti -static, can be cleaned
For now,more users like to watch the projection screen under brighter ambient light. However, the surface of the screen is easily affected by ambient light, which makes the image whitish, unclear and uneven, thus greatly reducing the contrast and brightness of the image and failing to achieve its own display or demonstration effect. In order to reduce the impact of stray light such as ambient light and natural light on the projection screen, a series of product solutions have been launched to meet customers’ needs for high definition, high contrast and better visual effects in bright environments. Fresnel ambient light rejecting screen are developed based on this, and this technology is also known as the best screen technology at present.
What is Fresnel ambient light rejecting screen? The structure of the Fresnel structure ambient light rejecting screen fabric is a set of semi-concentric circle patterns from large to small and then from small to large. Compared with the horizontal optical sawtooth structure of the black grid structure anti-light projection screen, it can not only absorb stray light from the top of the screen, but also has a certain inhibitory effect on the stray light from the left and right sides of the screen. Therefore, compared with other types of screens, such as PVC coated screens and black grid screens, the Fresnel structure ambient light rejecting screen has higher gain and picture brightness.
