The first time I heard about rear projection TV today, what exactly is a rear projection TV? Compared with traditional LCD TVs, there are similarities and differences between rear projection TVs. Here let us come together to understand the rear projection TV, and analyze the origin of the development of rear projection TV.
What is rear projection TV
"Rear projection" is the rear projection television set, which is a television display system that integrates the screen and projection system into one unit under the guise of projection and reflection. The full name of the rear projection display system is also called "Rear Projection Display System". In fact, rear projection is also a way of projection display.
Rear Projector is relative to the Front Projector. Simply put, the front projection is that the observer and the projector are on the same side of the reflective screen. The light projected from the projector shines on the screen. The observer sees the light reflected from the screen. The rear projection is the viewer and the projector. On the two sides of the rear projection screen, the projector is installed at the bottom of the camera body. When the light projected from the projector shines on the translucent rear projection screen, part of the light passes through, and the viewer sees the transmitted light. Light.
The advantages of rear projection TV
1. Bigger, clearer visual and audio-visual enjoyment.
2, mature high brightness and long life using technology.
3, more and stronger value-added guarantees, adapt to the requirements of the digital age.
4, more in line with environmental health requirements.
5, is affordable, long service life.
Differences from ordinary LCD TVs
Compared with ordinary TVs, rear-projection TVs do not use kinescopes, but use advanced projection optical systems to greatly enhance the brightness and clarity of televisions. At the same time, they are equipped with high-quality speaker systems to create a rear projection TV. A strong sense of presence. In addition, the rear-projection color TV adopts digital scanning method for signal processing, broadcasting hundreds of images per second, achieving a stable image without flicker, and the viewer will not feel tired of watching TV for a long time.
Rear projection TV development
The image quality of rear projection TVs is inextricably linked with scanning technology. The first generation of rear projection products was produced in the late 1980s and was successfully developed by Toshiba, Sony and other famous Japanese home appliance companies. The first generation of rear projection uses 50Hz interlacing technology, which can display only 25 images per second. The resolution is poor, the brightness is low, the image has a large area of ​​flicker, and it cannot be viewed in daylight.
The second generation of rear projection color TV appeared in the middle and late 1990s. Its main features are "100Hz interlace scan" and "50Hz progressive scan" two scan modes. Both modes display 50 images per second. In the "100Hz interlaced scan" mode, the image does not flicker but is clear. The degree is low, and the performance in the "50Hz progressive scan" mode is that although the resolution is high, the image still has a large area of ​​flicker. In fact, the true 100Hz progressive scan rear projection still does not exist.
The third generation of rear projection is 60Hz progressive scan rear projection color TV. The 60Hz progressive scan rear projection employs the latest technology of "digital frequency conversion + progressive scan", displaying 60 images per second, satisfactorily solving the problem of sharpness and image flicker.
The fourth-generation rear-projection product adopts the current advanced rear projection technology, 75Hz digital variable-frequency progressive scan rear-projection color TV, displaying up to 75 images per second, and the image scanning line per frame has reached a record 1520 per unit time. Line, image clarity, transparency and stability are all the best in the rear projection products.
The fifth generation of rear projection products adopts the latest digital video processing technology and 3D image quality improvement solutions. The pixel value has reached 2.06 million, the sensitivity of the picture tube has increased by nearly 300%, and the sharpness and brightness have been greatly improved. In addition, HDTV Ready is also equipped. Digital TV interface is fully compatible with upcoming digital television signals.
What is rear projection TV
"Rear projection" is the rear projection television set, which is a television display system that integrates the screen and projection system into one unit under the guise of projection and reflection. The full name of the rear projection display system is also called "Rear Projection Display System". In fact, rear projection is also a way of projection display.
Rear Projector is relative to the Front Projector. Simply put, the front projection is that the observer and the projector are on the same side of the reflective screen. The light projected from the projector shines on the screen. The observer sees the light reflected from the screen. The rear projection is the viewer and the projector. On the two sides of the rear projection screen, the projector is installed at the bottom of the camera body. When the light projected from the projector shines on the translucent rear projection screen, part of the light passes through, and the viewer sees the transmitted light. Light.
The advantages of rear projection TV
1. Bigger, clearer visual and audio-visual enjoyment.
2, mature high brightness and long life using technology.
3, more and stronger value-added guarantees, adapt to the requirements of the digital age.
4, more in line with environmental health requirements.
5, is affordable, long service life.
Differences from ordinary LCD TVs
Compared with ordinary TVs, rear-projection TVs do not use kinescopes, but use advanced projection optical systems to greatly enhance the brightness and clarity of televisions. At the same time, they are equipped with high-quality speaker systems to create a rear projection TV. A strong sense of presence. In addition, the rear-projection color TV adopts digital scanning method for signal processing, broadcasting hundreds of images per second, achieving a stable image without flicker, and the viewer will not feel tired of watching TV for a long time.
Rear projection TV development
The image quality of rear projection TVs is inextricably linked with scanning technology. The first generation of rear projection products was produced in the late 1980s and was successfully developed by Toshiba, Sony and other famous Japanese home appliance companies. The first generation of rear projection uses 50Hz interlacing technology, which can display only 25 images per second. The resolution is poor, the brightness is low, the image has a large area of ​​flicker, and it cannot be viewed in daylight.
The second generation of rear projection color TV appeared in the middle and late 1990s. Its main features are "100Hz interlace scan" and "50Hz progressive scan" two scan modes. Both modes display 50 images per second. In the "100Hz interlaced scan" mode, the image does not flicker but is clear. The degree is low, and the performance in the "50Hz progressive scan" mode is that although the resolution is high, the image still has a large area of ​​flicker. In fact, the true 100Hz progressive scan rear projection still does not exist.
The third generation of rear projection is 60Hz progressive scan rear projection color TV. The 60Hz progressive scan rear projection employs the latest technology of "digital frequency conversion + progressive scan", displaying 60 images per second, satisfactorily solving the problem of sharpness and image flicker.
The fourth-generation rear-projection product adopts the current advanced rear projection technology, 75Hz digital variable-frequency progressive scan rear-projection color TV, displaying up to 75 images per second, and the image scanning line per frame has reached a record 1520 per unit time. Line, image clarity, transparency and stability are all the best in the rear projection products.
The fifth generation of rear projection products adopts the latest digital video processing technology and 3D image quality improvement solutions. The pixel value has reached 2.06 million, the sensitivity of the picture tube has increased by nearly 300%, and the sharpness and brightness have been greatly improved. In addition, HDTV Ready is also equipped. Digital TV interface is fully compatible with upcoming digital television signals.