The latest screen application guide of home cinema

The latest screen application guide of home cinema

Speaking of home theater projection screen, although this is the entire projection system, an important part can not be ignored, but has not been sufficient attention to the majority of audio and video enthusiasts. To this end, we have repeatedly held a large projection screen home theater collective assessment, the role and influence is obvious, it caused widespread concern and attention to the projection screen manufacturers of audio and video enthusiasts, the domestic home theater projector curtain mature market also played a role.

Now, faced with growing home theater projector, especially the emergence of 4K Ultra HD models as well as the popularity of 3D models, the new generation of home theater projection screen thus made breakthrough progress. Especially in the curtain material above is even more alarming development, including more sophisticated surface acoustically transparent screen, environmental adaptability is stronger, wider viewing angle of a metal screen, and allows 3D and 2D projection are showing exact nature Almighty color screen and so on. We will analyze this issue at home and abroad the latest 4K and 3D home theater projection screen, revealing different strengths and limitations of various curtain material, but also to explain the projection screen to purchase, install and use the key point which for you audio and video enthusiasts and bring readers the latest in home theater projection screen application guide.

Analysis of the latest domestic and 4K and 3D home theater projection screen

Faced with the new 4K and 3D projection, home theater projection screen early face significant challenges. Due to the physical resolution of 4K Ultra HD projector has reached four times as much as a full HD projector, the original full HD resolution for home theater projection screen material is not necessarily capable of reproducing fine place 4K images. Similarly, for 3D projectors also encountered similar problems, no matter whether the projector uses active shutter 3D technology, or passive polarized 3D technology, when viewing 3D images, if the low-gain diffusion screen material, often pictures brightness will be low, although active shutter 3D display technology to optical characteristics of the projection screen has no special requirements. The use of high-gain metal screen material hot sun effect and other annoying issue is raised, it is quite troubled. In addition, most of the high-gain screen material are not suitable for viewing 2D images, which also led to a large video enthusiasts have to install two were for 2D and 3D video projection screen, not only cumbersome to install and use, but also increased the number of the formation costs.

In response to these problems, foreign and domestic projection screen manufacturers began to develop and launch a new generation of 4K and 3D home theater projection screen material, screen material by increasing sophistication to meet the requirements of 4K ultra-high-definition display, through to the surface of the optical coating material curtain Improved layer, enhanced 3D optical properties curtain material, reduce hot spots, sun phenomenon occurs, enhance screen material itself, color reproduction, Shidao 3D screen material combines the dual demands of stereoscopic projection of the plane. In an analysis of the major mainstream brand before a new generation of 4K and 3D home theater projector screen, let us together look at the basics of projection screen in order to better understand the latest sections of 4K and 3D projection screen features.

Two important parameters of the relationship between gain and viewing angle, and home theater projection screen

All home theater projection screen optical parameters will involve two parameters gain and viewing angle. Gain of height, the size of the viewing angle will affect our actual perception. First, the gain is the most important parameter projection screen. Projection screen gain parameters developed at full diffusion plate as the standard reference paint, in the center of the perspective of measuring the amount of reflected light intensity A, and set A standard reference value. Then the projection screen measurements under the same conditions as B, the ratio B / A is the projection screen gain value. If the calculation of the ratio of a section of home theater projection screen is 1, and called a gain of 1, indicating the value of this projection screen with a standard amount of reflected light intensity of the reflected reference coating is consistent. If the ratio is smaller than the calculated one, it is called negative gain. It should be noted that the number will certainly gain greater than zero, there is no negative.
Typically, the gain of the projection screen 1 belongs completely diffuse the diffusion screen, can cast light coming in all directions evenly spread out, and has a very wide viewing angle. The gain between 1.0-1.5 white screen or gray screen also belong diffusion screen, the horizontal viewing angle is nearly 180 °. Diffusion type screen is suitable for a variety of installation methods, including ceiling and horizontal mounting. The gain in 1.5 above high gain screen can be divided into the regression model with reflection-type screen. Regression curtain will focus the direction of the incident light projector reflection, and no angle between the incident light and the reflected light is only suitable level of projection, such as the front and rear seats flat to vote the way. A reflective screen is projected on the projector behind the incident ray will be a certain angle of refraction, not horizontal projection mode, projection mode according to the angle of refraction must choose the size of the ceiling or Landmark. When you select high gain metal screen, Beads and pearl curtain, it needs to pay attention to the screen is part of the reflection type or return type, so choose different installation methods to achieve the best picture results.

Viewing angle and gain, same as with the projection screen is a parameter closely linked to the intensity of reflected light, viewing angle horizontal viewing angle and vertical viewing angles of the points, generally 5 ° as a unit of measure, under normal circumstances We are talking about the viewing angle refers to the horizontal viewing angle. The maximum viewing angle viewing angle into a half-value perspective, 1/3 perspective. The so-called maximum viewing angle is the angle of the screen reflected light attenuation to 0:00 and the peak position. The half-value screen viewing angle compared to the angle between the reflected light attenuation peak position and half between the 1/3-screen perspective, compared to the attenuation of the emitted light when the angle between the 1/3 peak position. Usually considered within the scope of the half-value perspective the best viewing area, so the half-value angle projection screen parameters is most worthy of reference data.

Relationship between gain and viewing angle is relative, the smaller gain, viewing angle is greater. On the contrary, the greater the gain, the smaller viewing angle. For example, a gain of 1 projection screen capable of emitting incident uniformly in all directions, from a different perspective can get the same light intensity value, and high-gain projection screen will concentrate transmit to axial region, deviated from the region light intensity value will rapidly decline. Lower gain projection screen can restore the image faithfully, but extremely susceptible to the ambient light. High gain projection screen, although with a strong ability to adapt to the environment, but often leads to the middle of the screen bright, dark corners to happen, which is commonly known as the solar effect. In addition, high-gain Beads or metal screen, probably because of the reflective material itself grainy larger, causing hot issue. When we choose high-gain projection screen when the need to give full consideration to these issues.

It attaches great importance to a new generation of projection screen true color reductive

Front gain and viewing angles and we have mentioned, are based on the projection screen brightness changes caused by the reflected light of the parameter index. In fact the picture imaging characteristics among the projection screen, the color is able to achieve real reduction, there is no place to change the key color characteristics of the projector itself is among. Many video enthusiasts to buy expensive projectors, but found that the imaging performance of the screen and can not achieve the desired results, the most likely problem is responsible for the projection of light reflected to the human eye's projection screen.

The light emitted by the projector, after projection screen reflection stimulate the human eye, the eye produces the brightness and color of this object of sensory information, and this information is transmitted to the brain center, in sensory information processing in the brain, so they formed the color perception, people will be able to identify the brightness of the color category, color purity degree of information for this object. Which is a very important characteristic saturation, saturation refers to the degree of shading or color of an object color purity. Visible spectrum of various monochromatic highest chroma color most pure, white saturation minimum. The selectivity depends on the degree of saturation of the object surface reflection spectrum of radiation. If the object of a very narrow band spectral reflectance, while the other bands of low reflectivity, this band of color saturation is high. For the projection screen is concerned, according to this principle can be used to determine the projection screen in the color expression capability. Excellent projection screen visible light reflectance of bands generally high, it is possible to obtain very accurate basic colors, such as red, orange, yellow, green, blue, indigo, violet. Only accurately restore the basic color, in order to ensure the accuracy of the color space of the picture projector to project out.

Some excellent projection screen manufacturer in the study when the curtain material, usually a variety of reflected light spectrum curtain material be tested to find out can fully reflect the entire band of the best natural light curtain material. For some common vendors, this is generally not the bottom, as long as the gain is sufficient to meet the requirements. This is why two different manufacturers introduced two gain the same white plastic screen is 1.0, the main reason for the existence of different expression in terms of color. Coupled with a large projection screen reflection range, surface uniformity is good or bad will directly affect the ability of saturation reduction.

Most previous projection screen manufacturers have not disclosed the reflected light spectrum projection screen and some basic color-related information, and in the next generation for the 4K and 3D projection screen new products, there are a few manufacturers began revealing the projection screen in terms of color performance, including key parameters balance, reflected light color gamut, color off-axis performance, these are important indicators we need to focus.

Acoustically transparent screen is currently the fastest growing in the field of home theater projection screen curtain material

Acoustically transparent screen name suggests is the ability to penetrate the screen with sound material, all commercial cinemas are based acoustically transparent screen mode. In the home theater field, more and more video enthusiasts are choosing acoustically transparent screen, not only can make better use of the space to achieve greater visual images, but also to achieve the perfect unity of sound and picture, because the projection behind the scenes Party speaker acoustically transparent screen through the hole on the transfers sound out. Acoustically transparent screen is divided into woven and perforated two categories, woven curtain can get excellent sound performance, while perforated screen can have a stronger effect. Woven acoustically transparent screen aperture ratio of the perforated type acoustically transparent screen to be small, not prone to interference fringes (moire fringe). In recent years, many ways of using perforated acoustically transparent screen gradually began using micro perforated manner, the aperture is often only between 0.4-0.5mm, can avoid the moire fringe, while the fineness of the screen can be greatly improved, sufficient 4K Ultra HD display meet the requirements.

In addition, home theater projection screen with many different installation methods, including frame screen, electric screen, NRK screen and so on. Frame Screen is a favorite of most enthusiasts projection screen, using a strong stretch of the way around, even if long-term use will not fold injustice of the situation. But the presence of frame projection screen open architecture dustproof poor questions, suggestions curtains to block with activities. And more than 150 inches of screen frame, often with curved manner so as to minimize distortion edge of the screen, enhancing the sharpness of the edge detail. NRK screen electric screen and the same type of projection screen, using the stretch from the top down, the difference is that electric screen uses an electric stretch of the way, while NRK screen is used to manually stretch the way. Electric curtain stretched to ensure smooth during stretching, so as to avoid wrinkles and other undesirable phenomena, while NRK screen of more affordable for the average consumer to use. Electric screen is divided into cable and non-cable curtain curtain, the former through the cable to adjust the flatness of the curtain. In addition, home theater projection screen as well as a more mobile to pull the curtain, only limited size, not widely used.