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Due to the limitations of technology and cost, the traditional CRT TV set is basically the limit of the screen diagonal size. Nowadays, the most popular large-screen ordinary TV on the market is still 29-inch and 34-inch, although the picture tube is now The design and quality of the TV has been greatly improved, but the innate limitations of the size of the TV can not be seen in the contrast of the hospital. The size of the rear-projection color TV is 43 inches, 48 ​​inches, 51 inches. Changhong has also developed a 65-inch 16:9 format rear-projection color TV, and even the company's projection TV exceeds 70 inches. Moreover, today's rear projection TVs are equipped with 3D Dolby Surround and Dolby Pro Logic surround sound. In addition to the left and right speakers and subwoofers, these TVs also feature a center speaker and two external surround back speakers. Its larger picture brings better audiovisual effects.
Most of the traditional picture tube color TVs still use interlaced scanning technology, and the lines flicker seriously. After a long time, the eyes will be tired and the head will be faint. Interlaced scanning technology is also used in some imported rear projection TVs. Nowadays, the rear-projection color TV adopts progressive scanning technology. For example, Changhong "fine king" rear-projection color TV is the world's first precision imaging technology using progressive scan +60/75HZ frequency conversion, eliminating inter-line flicker and large image. The area flickers, the image is stable, delicate, and the level is clear. Moreover, the automatic digital noise reduction and sharpness improvement circuit of the rear projection television can detect the input image content one by one, dynamically control the noise reduction circuit and the noise reduction amount, thereby improving the image quality. An image without noise is not processed by a filter controlled by the level of the noise level, and an image with better noise and sharpness is obtained. The horizontal viewing angle of the rear projection is 160°, the vertical viewing angle is 70°, and the screen brightness is increased to the level of 350 nits, which can fully meet the viewing requirements.
2. Mature high brightness and long life use technology.
The rear projection display system uses a closed projection light path, so the external light interference is completely avoided, so that the screen brightness is greatly improved. We know that the general projector brightness is about 1000 lumens, and the rear projection TV lumens can reach 4000~5000, so there will be no bleak effect, making the display image more vivid and lifelike. For example, Changhong "Jingxian Wang" rear-projection color TV adopts a uniform gain screen consisting of a lenticular lens, a Fresnel optical lens and a protective lens. It has ultra-high brightness and eliminates the influence of ambient light reflection to protect the eyes from fatigue. In addition, in the past, the rear-projection color TV was not effectively solved due to the high heat of the projection tube, including many imported rear-projection color TVs, which still only have a service life of about 15,000 hours, and Changhong Company has uniquely formulated the cooling agent for cooling in the projection tube. The service life. The service life of Changhong "Jingxianwang" rear-projection color TV is 25,000 hours, which means that if you look at 4 hours a day, you can use it for 20 years, which is 1.67 times of the life of some imported rear-projection color TVs.
3. More and more value-added guarantees to meet the requirements of the digital age.
Nowadays, the rear-projection color TVs generally have VGA, SVGA interface, high-fidelity audio, etc. After surfing the computer, they can surf the Internet, watch stock quotes, play computer games, etc. Because of the characteristics of their large screens, the pictures are clear and the audiovisual is more shocking. To provide consumers with more and better value-added service content.
4, more in line with environmental health requirements.
The working principle of the traditional picture tube TV is that the high-speed electron gun emits a high-speed electron flow to illuminate the phosphor coating of the picture tube. In this working process, electromagnetic radiation such as X-rays is generated, and the larger the screen, the stronger the radiation. . The working principle of the rear projection TV is to use three projection tubes to project the beam onto the mirror surface of the machine, and then to reflect the mirror image onto the screen. In this process, the light is moving, so there is no radiation hazard. Moreover, the DLP rear projection TV adopts full digital processing, thus avoiding the process of scanning the screen necessary for the ordinary CRT display, thereby avoiding the flicker of the image and making the image display more stable. It is also for this reason that there is no need to use high-voltage scanning circuits for rear projection display, so there is no X-ray radiation, which fully realizes zero radiation requirements, reduces harm to the human body, and is more in line with the modern green environmental protection trend, which is beneficial to home users. health.
5, is affordable, long service life.
At present, the price of projectors on the market is generally more than 20,000 yuan, and it is mainly in the hands of foreign brands. The rear projection products have superior performance and affordable price, and the price is between 1-3 million. In addition, after the signal is received by the front projector, the light is diverged due to the propagation process, and a large number of signals are lost. Therefore, the clarity and brightness of the original signal are greatly weakened during the final display. In many cases, the student cannot see the image on the screen at all. Handwriting. When the projector's lamp life expires, the brightness of the projector will drop significantly. At this time, the bulb should be replaced. At present, the price of the bulb is relatively high. The common data projector lamp costs several thousand yuan and is expensive to use. The life of the lamp of the rear-projection color TV is much higher than that of the ordinary projection. For example, the Changhong 75P series rear-projection color TV has the service life of more than 20,000 hours due to the adoption of international advanced technology, and is the most cost-effective product in the receiving and display terminal equipment. 1. Larger, clearer picture viewing and enjoyment.
Due to the limitations of technology and cost, the traditional CRT TV set is basically the limit of the screen diagonal size. Nowadays, the most popular large-screen ordinary TV on the market is still 29-inch and 34-inch, although the picture tube is now The design and quality of the TV has been greatly improved, but the innate limitations of the size of the TV can not be seen in the contrast of the hospital. The size of the rear-projection color TV is 43 inches, 48 ​​inches, 51 inches. Changhong has also developed a 65-inch 16:9 format rear-projection color TV, and even the company's projection TV exceeds 70 inches. Moreover, today's rear projection TVs are equipped with 3D Dolby Surround and Dolby Pro Logic surround sound. In addition to the left and right speakers and subwoofers, these TVs also feature a center speaker and two external surround back speakers. Its larger picture brings better audiovisual effects.
Most of the traditional picture tube color TVs still use interlaced scanning technology, and the lines flicker seriously. After a long time, the eyes will be tired and the head will be faint. Interlaced scanning technology is also used in some imported rear projection TVs. Nowadays, the rear-projection color TV adopts progressive scanning technology. For example, Changhong "fine king" rear-projection color TV is the world's first precision imaging technology using progressive scan +60/75HZ frequency conversion, eliminating inter-line flicker and large image. The area flickers, the image is stable, delicate, and the level is clear. Moreover, the automatic digital noise reduction and sharpness improvement circuit of the rear projection television can detect the input image content one by one, dynamically control the noise reduction circuit and the noise reduction amount, thereby improving the image quality. An image without noise is not processed by a filter controlled by the level of the noise level, and an image with better noise and sharpness is obtained. The horizontal viewing angle of the rear projection is 160°, the vertical viewing angle is 70°, and the screen brightness is increased to the level of 350 nits, which can fully meet the viewing requirements.
2. Mature high brightness and long life use technology.
The rear projection display system uses a closed projection light path, so the external light interference is completely avoided, so that the screen brightness is greatly improved. We know that the general projector brightness is about 1000 lumens, and the rear projection TV lumens can reach 4000~5000, so there will be no bleak effect, making the display image more vivid and lifelike. For example, Changhong "Jingxian Wang" rear-projection color TV adopts a uniform gain screen consisting of a lenticular lens, a Fresnel optical lens and a protective lens. It has ultra-high brightness and eliminates the influence of ambient light reflection to protect the eyes from fatigue. In addition, in the past, the rear-projection color TV was not effectively solved due to the high heat of the projection tube, including many imported rear-projection color TVs, which still only have a service life of about 15,000 hours, and Changhong Company has uniquely formulated the cooling agent for cooling in the projection tube. The service life. The service life of Changhong "Jingxianwang" rear-projection color TV is 25,000 hours, which means that if you look at 4 hours a day, you can use it for 20 years, which is 1.67 times of the life of some imported rear-projection color TVs.
3. More and more value-added guarantees to meet the requirements of the digital age.
Nowadays, the rear-projection color TVs generally have VGA, SVGA interface, high-fidelity audio, etc. After surfing the computer, they can surf the Internet, watch stock quotes, play computer games, etc. Because of the characteristics of their large screens, the pictures are clear and the audiovisual is more shocking. To provide consumers with more and better value-added service content.
4, more in line with environmental health requirements.
The working principle of the traditional picture tube TV is that the high-speed electron gun emits a high-speed electron flow to illuminate the phosphor coating of the picture tube. In this working process, electromagnetic radiation such as X-rays is generated, and the larger the screen, the stronger the radiation. . The working principle of the rear projection TV is to use three projection tubes to project the beam onto the mirror surface of the machine, and then to reflect the mirror image onto the screen. In this process, the light is moving, so there is no radiation hazard. Moreover, the DLP rear projection TV adopts full digital processing, thus avoiding the process of scanning the screen necessary for the ordinary CRT display, thereby avoiding the flicker of the image and making the image display more stable. It is also for this reason that there is no need to use high-voltage scanning circuits for rear projection display, so there is no X-ray radiation, which fully realizes zero radiation requirements, reduces harm to the human body, and is more in line with the modern green environmental protection trend, which is beneficial to home users. health.
5, is affordable, long service life.
At present, the price of projectors on the market is generally more than 20,000 yuan, and it is mainly in the hands of foreign brands. The rear projection products have superior performance and affordable price, and the price is between 1-3 million. In addition, after the signal is received by the front projector, the light is diverged due to the propagation process, and a large number of signals are lost. Therefore, the clarity and brightness of the original signal are greatly weakened during the final display. In many cases, the student cannot see the image on the screen at all. Handwriting. When the projector's lamp life expires, the brightness of the projector will drop significantly. At this time, the bulb should be replaced. At present, the price of the bulb is relatively high. The common data projector lamp costs several thousand yuan and is expensive to use. The life of the lamp of the rear-projection color TV is much higher than that of the ordinary projection. For example, the Changhong 75P series rear-projection color TV has the service life of more than 20,000 hours due to the adoption of international advanced technology, and is the most cost-effective product in the receiving and display terminal equipment. 1. Larger, clearer picture viewing and enjoyment.
Due to the limitations of technology and cost, the traditional CRT TV set is basically the limit of the screen diagonal size. Nowadays, the most popular large-screen ordinary TV on the market is still 29-inch and 34-inch, although the picture tube is now The design and quality of the TV has been greatly improved, but the innate limitations of the size of the TV can not be seen in the contrast of the hospital. The size of the rear-projection color TV is 43 inches, 48 ​​inches, 51 inches. Changhong has also developed a 65-inch 16:9 format rear-projection color TV, and even the company's projection TV exceeds 70 inches. Moreover, today's rear projection TVs are equipped with 3D Dolby Surround and Dolby Pro Logic surround sound. In addition to the left and right speakers and subwoofers, these TVs also feature a center speaker and two external surround back speakers. Its larger picture brings better audiovisual effects.
Most of the traditional picture tube color TVs still use interlaced scanning technology, and the lines flicker seriously. After a long time, the eyes will be tired and the head will be faint. Interlaced scanning technology is also used in some imported rear projection TVs. Nowadays, the rear-projection color TV adopts progressive scanning technology. For example, Changhong "fine king" rear-projection color TV is the world's first precision imaging technology using progressive scan +60/75HZ frequency conversion, eliminating inter-line flicker and large image. The area flickers, the image is stable, delicate, and the level is clear. Moreover, the automatic digital noise reduction and sharpness improvement circuit of the rear projection television can detect the input image content one by one, dynamically control the noise reduction circuit and the noise reduction amount, thereby improving the image quality. An image without noise is not processed by a filter controlled by the level of the noise level, and an image with better noise and sharpness is obtained. The horizontal viewing angle of the rear projection is 160°, the vertical viewing angle is 70°, and the screen brightness is increased to the level of 350 nits, which can fully meet the viewing requirements.
2. Mature high brightness and long life use technology.
The rear projection display system uses a closed projection light path, so the external light interference is completely avoided, so that the screen brightness is greatly improved. We know that the general projector brightness is about 1000 lumens, and the rear projection TV lumens can reach 4000~5000, so there will be no bleak effect, making the display image more vivid and lifelike. For example, Changhong "Jingxian Wang" rear-projection color TV adopts a uniform gain screen consisting of a lenticular lens, a Fresnel optical lens and a protective lens. It has ultra-high brightness and eliminates the influence of ambient light reflection to protect the eyes from fatigue. In addition, in the past, the rear-projection color TV was not effectively solved due to the high heat of the projection tube, including many imported rear-projection color TVs, which still only have a service life of about 15,000 hours, and Changhong Company has uniquely formulated the cooling agent for cooling in the projection tube. The service life. The service life of Changhong "Jingxianwang" rear-projection color TV is 25,000 hours, which means that if you look at 4 hours a day, you can use it for 20 years, which is 1.67 times of the life of some imported rear-projection color TVs.
3. More and more value-added guarantees to meet the requirements of the digital age.
Nowadays, the rear-projection color TVs generally have VGA, SVGA interface, high-fidelity audio, etc. After surfing the computer, they can surf the Internet, watch stock quotes, play computer games, etc. Because of the characteristics of their large screens, the pictures are clear and the audiovisual is more shocking. To provide consumers with more and better value-added service content.
4, more in line with environmental health requirements.
The working principle of the traditional picture tube TV is that the high-speed electron gun emits a high-speed electron flow to illuminate the phosphor coating of the picture tube. In this working process, electromagnetic radiation such as X-rays is generated, and the larger the screen, the stronger the radiation. . The working principle of the rear projection TV is to use three projection tubes to project the beam onto the mirror surface of the machine, and then to reflect the mirror image onto the screen. In this process, the light is moving, so there is no radiation hazard. Moreover, the DLP rear projection TV adopts full digital processing, thus avoiding the process of scanning the screen necessary for the ordinary CRT display, thereby avoiding the flicker of the image and making the image display more stable. It is also for this reason that there is no need to use high-voltage scanning circuits for rear projection display, so there is no X-ray radiation, which fully realizes zero radiation requirements, reduces harm to the human body, and is more in line with the modern green environmental protection trend, which is beneficial to home users. health.
5, is affordable, long service life.
At present, the price of projectors on the market is generally more than 20,000 yuan, and it is mainly in the hands of foreign brands. The rear projection products have superior performance and affordable price, and the price is between 1-3 million. In addition, after the signal is received by the front projector, the light is diverged due to the propagation process, and a large number of signals are lost. Therefore, the clarity and brightness of the original signal are greatly weakened during the final display. In many cases, the student cannot see the image on the screen at all. Handwriting. When the projector's lamp life expires, the brightness of the projector will drop significantly. At this time, the bulb should be replaced. At present, the price of the bulb is relatively high. The common data projector lamp costs several thousand yuan and is expensive to use. The life of the lamp of the rear-projection color TV is much higher than that of the ordinary projection. For example, the Changhong 75P series rear-projection color TV has the service life of more than 20,000 hours due to the adoption of international advanced technology, and is the most cost-effective product in the receiving and display terminal equipment.
1. Larger, clearer picture viewing and enjoyment.