wholesale jewelry stores in towson maryland What is a backstop TV?

Simon

November 27, 2022 at 6:31 pm

wholesale bulk jewelry making supplies Back to TV

, as the name suggests, "back investment" is the TV that is projected behind. A television imaging system that is based on the principle of projection and reflection to place the screen and projection system in one. In the projection display device, the projection display is divided into two ways: front projection (Front) and back projection. The most direct application of positive projection is the projector, which refers to the projection of light to the front of the screen. The principle of back projection is simple to install the projector at the bottom of the fuselage. The signal is reflected and projected into the translucent screen back of the screen. Back -to -TV TV is the product of this principle. According to the types of projector used inside, it can be divided into two types: LCD (LCD) and DLP (digital light path processors). Due to the integration of projectors and screens, users who throw a TV do not need to adjust the system optical adjustment, which makes it more convenient to use more than the front projector.

The technical principles of backing TV

The imaging principle of back projection color TV and ordinary color TV, but it combines projection technology on the basis of ordinary color TVs, developed and developed Completed. From the perspective of its working principle, the principle of the receiving part is basically the same as that of ordinary color TVs, and the biggest difference is the processing after receiving the TV signal. After receiving the video signal, the ordinary color TV signal is directly displayed on the screen by the appearance tube, and after the projection color TV receives the signal, the circuit process is processed, and then optimized by the cluster circuit and the digital filter circuit to transmit it to the red (R) that is discharged and discharged. , Green (G), Blue (B) 3 monochrome projector. The TV images generated by the three projectors were large through the lens, and the reflex was reflected into the projection screen into a complete large screen color image. The size used by ordinary color TVs is consistent with the size of the TV. For example, ordinary 25 -inch TVs use a 25 -inch appearance tube, while the back projection color TV uses 3 7 -inch small pipes. These three tubes emit red and green respectively. , Blue 3 colors of light, they are superimposed on the screen to form a complete image. That is, its basic principle is to integrate what we usually call the projector and screen. Basic principles can be represented in the figure below.

The projector's projection image must be projected on the screen after several reflections, so the back -projection projection has high requirements for the reflex mirror. The first is not to deform, and the second is that the reflectance is high. In terms of reflectivity, it is different from ordinary optical glass reflexes. Back -projection projection is a positive reflection method with higher reflection rates.

The projector is an important part of the projection display system. The performance parameters mainly include brightness, contrast, resolution, etc. Its performance represents the quality of the screen display.

At this stage, the large -screen backdoor TV can include three categories: plasma TV, LCD backstop TV and DLP back to TV. They all have very high clarity, especially plasma TV and LCD backstop TV. However, although the first two products have obvious advantages, they are now limited by cost and manufacturing. The price is very expensive, and non -general consumers can bear it. Now that the DLP backstop TV has obvious advantages compared with the traditional CRT TV, it is much cheaper than the other two products in terms of price. Therefore, for most home users, DLP backstop is a reasonable choice. Therefore, here is mainly explained to the DLP backstop TV.

DLP is the abbreviation of English Digital Light Porsesors, translated as a digital light processor. It uses digital microscope devices as imaging devices with DMD (DIGITAL Device), and reflects the light into the screen to the screen. The key device DMD is a semiconductor component developed by Texas Instrument Company. A DMD chip contains thousands of tiny square reflex lenses. These microscopes are tightly arranged according to the ranks. Each microscope represents a pixel and can be controlled by the corresponding memory in the two states of opening or passing to control the reflection of the light.

DLP projector's technical key points are as follows: First is the digital advantage. The adoption of digital technology makes the gray level of the image reaches 256-1024, and the color can reach 2563-10243. The image noise disappears, the quality of the picture is stable, the precise digital images can be continuously reproduced, and it is long -lasting. Followed by reflection advantages. The application of reflective DMD devices makes the total light efficiency of the imaging device more than 60%, and the uniformity of the contrast and brightness is very good. On the DMD block, the area of each pixel is 16 μm × 16 μm and the interval is 1 μm. According to the number of DMDs used, the DLP projector can be divided into: single -chip microcomputers, two machines, three -chip machine.

The advantages of backing TV

1, larger and clearer picture audiovisual enjoyment.

The traditional imaging tube TV is limited by technical and cost, 38 inches is basically the limit of screen -diagonal size. Now the most popular large screen ordinary TV on the market is still 29 -inch and 34 -inch is mainly based on the design and quality of the TV tube TV, but the innate restrictions of its size cannot create a theater -like shock. The size of the backdrop of color TV is 43 -inch, 48 -inch, and 51 inches. Changhong also developed a 65 -inch 16: 9 format for backdrop color TV, and even the company's projection TV exceeded 70 inches. Moreover, today's backstop TV is equipped with 3D Dolby Surrounding and Dolby Direct Logic Sound. In addition to the left and right speakers and heavy subwoofer inside these TVs, there is also a mid -set speaker, and two external rear surround speakers are provided. Its larger picture brings better audiovisual effects.

The traditional imaging tube color TV still uses interval scanning technology. The lines are severe, and the eyes will be fatigue and become stunned after a long time. Including some imported backdoor color TVs are still using interval scanning technology. And the current backdrop color TV basically uses a line -by -line scanning technology. For example, the "Essence of Changhong" is the first precision appearance technology that uses line -by -line scanning 60 / 75Hz frequency conversion The area flickering, the image is stable, delicate, and clear. Moreover, the automatic digital noise reduction and sharpness of the backstop TV species can detect the input image content one by one, and dynamically control the noise reduction circuit and noise reduction, so that the image quality can be improved. Images without noise will not be processed by the filter controlled by the noise level, and obtain images with better noise and definition. The horizontal viewing angle of the back investment is 160 °, the vertical angle is 70 °, and the screen brightness increases to the level of 350 Nit, which can fully meet the viewing requirements.

2, mature high brightness and long life use technology.

The back -doting display system uses a closed projection light path, so it completely avoids external light interference, so the screen brightness is greatly improved. We know that the brightness of the general projector is about 1,000, and the backdoor TV flow can reach about 4000 to 5000. This will not have a bleak effect, making the display image more beautiful and realistic. For example, Changhong "Essence King" Back cast color TV uses a uniform gain screen consisting of dual -convex lens, Fresnel optical lens, and protecting the lens. It has ultra -high brightness, and also eliminates the impact of environmental light reflection and protects the eyes. In addition, in the past, due to the high fever problem of the high heat of the projection tube, the backdrops, including many imported backdrops, were still only about 15,000 hours of service life. Changhong Company conducted a unique formula for cooling the cooling effect in the projector, extending Life life. The life of the "Essence of the Essence of the Essence of Changxian" is 25,000 hours, which means that if you watch 4 hours a day, you can use it for 20 years, which is 1.67 times the life of some imported backdrops.

3, more and stronger value -added guarantees, and adapt to the requirements of the digital era.

The back -doting color TV generally has VGA, SVGA interface, high -fidelity audio, etc. After connecting the computer, you can surf the Internet, watch stock markets, play computer games, etc. Make the graphic clear and the audiovisual, and provide consumers with more and better value -added services.

4, more in line with environmental protection and health requirements.

The working principle of the traditional imaging tube TV is shining with high -speed electronics on the fluorescent powder coating of high -speed electronic guns on high -speed electronics. In this work process, electromagnetic radiation such as X -rays will be generated, and The larger the screen, the stronger the radiation. The working principle of the back -to -television is to project the beam on the mirror surface with three projection tubes, and then reflect it from the mirror surface to the screen to imagine. This process is a movement of light, so there is no harm of radiation. In addition, DLP back to TV uses full digital processing, so as to avoid the scanning screen necessary for ordinary CRT displays, so it also avoids the flashing of the image and makes the image display more stable. It is also the reason that there is no need to use a high -voltage scanning circuit, so there is no X -ray radiation, which fully realizes zero radiation requirements, reduces damage to the human body, is more in line with modern green environmental protection trends, which is conducive to family users’s healthy.

5. It is affordable and long service life.

The projectors on the current market are generally more than 20,000 yuan, and they are mainly in the hands of foreign brands. Back investment products are superior, with affordable prices, and the price is between 10 and 30,000. In addition, after receiving the signal of the former investment instrument, the light divergent due to the transmission process, and a large number of signals were lost. Therefore, the clarity and brightness of the original signal were greatly weakened when it was finally displayed. Words. When the life of the projectile light bulb expires, the brightness of the projector will decrease significantly. At this time, the bulb is to be replaced. At present, the price of light bulbs is relatively high. The price of common data projector light bulbs is thousands of yuan, which is expensive. The lamp life of the backdoor color TV is much higher than that of ordinary projection. For example, the Changhong 75P series of backdrops, due to international advanced technology, have a service life of more than 20,000 hours. It is the most cost -effective product in receiving and displaying terminal equipment.

The main application areas of backdrop

1, office field. In the office meeting, when watching the computer content, you often need to connect a projector to hang the screen, and the screen is sometimes not very clear, which has a certain impact on the meeting. On the one hand, the use of the back investment is simple and convenient, and on the other hand, the size of the picture is completely in line with the requirements of the meeting. Therefore, there is currently a trend of alternative projection in the office field.

2, school multimedia application. Compared with the projector, back projection TV is relatively cheap, and the use time is long, and there is a VGA interface. The perspective is wide. It can fully meet the requirements of multimedia applications. The cost performance is higher. Therefore, many schools have established a multimedia classroom with a backstop TV as the appearance.

3, home theater. In recent years, as the audio and video concept of "home theater" has been introduced into people's lives, the number of middle -level income personnel has become increasingly large. The traditional CRT imaging tube TV, including Chunping TV, cannot exceed 38 inches due to its own technical principles. Therefore, the increase in the area of the home area and the traditional TV screen are limited, making the backstop TV the first choice in home theater construction.

3 thoughts on “wholesale jewelry stores in towson maryland What is a backstop TV?”

Simon
November 27, 2022 at 6:31 pm

wholesale bulk jewelry making supplies Back to TV

, as the name suggests, "back investment" is the TV that is projected behind. A television imaging system that is based on the principle of projection and reflection to place the screen and projection system in one. In the projection display device, the projection display is divided into two ways: front projection (Front) and back projection. The most direct application of positive projection is the projector, which refers to the projection of light to the front of the screen. The principle of back projection is simple to install the projector at the bottom of the fuselage. The signal is reflected and projected into the translucent screen back of the screen. Back -to -TV TV is the product of this principle. According to the types of projector used inside, it can be divided into two types: LCD (LCD) and DLP (digital light path processors). Due to the integration of projectors and screens, users who throw a TV do not need to adjust the system optical adjustment, which makes it more convenient to use more than the front projector.

The technical principles of backing TV

The imaging principle of back projection color TV and ordinary color TV, but it combines projection technology on the basis of ordinary color TVs, developed and developed Completed. From the perspective of its working principle, the principle of the receiving part is basically the same as that of ordinary color TVs, and the biggest difference is the processing after receiving the TV signal. After receiving the video signal, the ordinary color TV signal is directly displayed on the screen by the appearance tube, and after the projection color TV receives the signal, the circuit process is processed, and then optimized by the cluster circuit and the digital filter circuit to transmit it to the red (R) that is discharged and discharged. , Green (G), Blue (B) 3 monochrome projector. The TV images generated by the three projectors were large through the lens, and the reflex was reflected into the projection screen into a complete large screen color image. The size used by ordinary color TVs is consistent with the size of the TV. For example, ordinary 25 -inch TVs use a 25 -inch appearance tube, while the back projection color TV uses 3 7 -inch small pipes. These three tubes emit red and green respectively. , Blue 3 colors of light, they are superimposed on the screen to form a complete image. That is, its basic principle is to integrate what we usually call the projector and screen. Basic principles can be represented in the figure below.

The projector's projection image must be projected on the screen after several reflections, so the back -projection projection has high requirements for the reflex mirror. The first is not to deform, and the second is that the reflectance is high. In terms of reflectivity, it is different from ordinary optical glass reflexes. Back -projection projection is a positive reflection method with higher reflection rates.

The projector is an important part of the projection display system. The performance parameters mainly include brightness, contrast, resolution, etc. Its performance represents the quality of the screen display.

At this stage, the large -screen backdoor TV can include three categories: plasma TV, LCD backstop TV and DLP back to TV. They all have very high clarity, especially plasma TV and LCD backstop TV. However, although the first two products have obvious advantages, they are now limited by cost and manufacturing. The price is very expensive, and non -general consumers can bear it. Now that the DLP backstop TV has obvious advantages compared with the traditional CRT TV, it is much cheaper than the other two products in terms of price. Therefore, for most home users, DLP backstop is a reasonable choice. Therefore, here is mainly explained to the DLP backstop TV.

DLP is the abbreviation of English Digital Light Porsesors, translated as a digital light processor. It uses digital microscope devices as imaging devices with DMD (DIGITAL Device), and reflects the light into the screen to the screen. The key device DMD is a semiconductor component developed by Texas Instrument Company. A DMD chip contains thousands of tiny square reflex lenses. These microscopes are tightly arranged according to the ranks. Each microscope represents a pixel and can be controlled by the corresponding memory in the two states of opening or passing to control the reflection of the light.

DLP projector's technical key points are as follows: First is the digital advantage. The adoption of digital technology makes the gray level of the image reaches 256-1024, and the color can reach 2563-10243. The image noise disappears, the quality of the picture is stable, the precise digital images can be continuously reproduced, and it is long -lasting. Followed by reflection advantages. The application of reflective DMD devices makes the total light efficiency of the imaging device more than 60%, and the uniformity of the contrast and brightness is very good. On the DMD block, the area of each pixel is 16 μm × 16 μm and the interval is 1 μm. According to the number of DMDs used, the DLP projector can be divided into: single -chip microcomputers, two machines, three -chip machine.

The advantages of backing TV

1, larger and clearer picture audiovisual enjoyment.

The traditional imaging tube TV is limited by technical and cost, 38 inches is basically the limit of screen -diagonal size. Now the most popular large screen ordinary TV on the market is still 29 -inch and 34 -inch is mainly based on the design and quality of the TV tube TV, but the innate restrictions of its size cannot create a theater -like shock. The size of the backdrop of color TV is 43 -inch, 48 -inch, and 51 inches. Changhong also developed a 65 -inch 16: 9 format for backdrop color TV, and even the company's projection TV exceeded 70 inches. Moreover, today's backstop TV is equipped with 3D Dolby Surrounding and Dolby Direct Logic Sound. In addition to the left and right speakers and heavy subwoofer inside these TVs, there is also a mid -set speaker, and two external rear surround speakers are provided. Its larger picture brings better audiovisual effects.

The traditional imaging tube color TV still uses interval scanning technology. The lines are severe, and the eyes will be fatigue and become stunned after a long time. Including some imported backdoor color TVs are still using interval scanning technology. And the current backdrop color TV basically uses a line -by -line scanning technology. For example, the "Essence of Changhong" is the first precision appearance technology that uses line -by -line scanning 60 / 75Hz frequency conversion The area flickering, the image is stable, delicate, and clear. Moreover, the automatic digital noise reduction and sharpness of the backstop TV species can detect the input image content one by one, and dynamically control the noise reduction circuit and noise reduction, so that the image quality can be improved. Images without noise will not be processed by the filter controlled by the noise level, and obtain images with better noise and definition. The horizontal viewing angle of the back investment is 160 °, the vertical angle is 70 °, and the screen brightness increases to the level of 350 Nit, which can fully meet the viewing requirements.

2, mature high brightness and long life use technology.

The back -doting display system uses a closed projection light path, so it completely avoids external light interference, so the screen brightness is greatly improved. We know that the brightness of the general projector is about 1,000, and the backdoor TV flow can reach about 4000 to 5000. This will not have a bleak effect, making the display image more beautiful and realistic. For example, Changhong "Essence King" Back cast color TV uses a uniform gain screen consisting of dual -convex lens, Fresnel optical lens, and protecting the lens. It has ultra -high brightness, and also eliminates the impact of environmental light reflection and protects the eyes. In addition, in the past, due to the high fever problem of the high heat of the projection tube, the backdrops, including many imported backdrops, were still only about 15,000 hours of service life. Changhong Company conducted a unique formula for cooling the cooling effect in the projector, extending Life life. The life of the "Essence of the Essence of the Essence of Changxian" is 25,000 hours, which means that if you watch 4 hours a day, you can use it for 20 years, which is 1.67 times the life of some imported backdrops.

3, more and stronger value -added guarantees, and adapt to the requirements of the digital era.

The back -doting color TV generally has VGA, SVGA interface, high -fidelity audio, etc. After connecting the computer, you can surf the Internet, watch stock markets, play computer games, etc. Make the graphic clear and the audiovisual, and provide consumers with more and better value -added services.

4, more in line with environmental protection and health requirements.

The working principle of the traditional imaging tube TV is shining with high -speed electronics on the fluorescent powder coating of high -speed electronic guns on high -speed electronics. In this work process, electromagnetic radiation such as X -rays will be generated, and The larger the screen, the stronger the radiation. The working principle of the back -to -television is to project the beam on the mirror surface with three projection tubes, and then reflect it from the mirror surface to the screen to imagine. This process is a movement of light, so there is no harm of radiation. In addition, DLP back to TV uses full digital processing, so as to avoid the scanning screen necessary for ordinary CRT displays, so it also avoids the flashing of the image and makes the image display more stable. It is also the reason that there is no need to use a high -voltage scanning circuit, so there is no X -ray radiation, which fully realizes zero radiation requirements, reduces damage to the human body, is more in line with modern green environmental protection trends, which is conducive to family users’s healthy.

5. It is affordable and long service life.

The projectors on the current market are generally more than 20,000 yuan, and they are mainly in the hands of foreign brands. Back investment products are superior, with affordable prices, and the price is between 10 and 30,000. In addition, after receiving the signal of the former investment instrument, the light divergent due to the transmission process, and a large number of signals were lost. Therefore, the clarity and brightness of the original signal were greatly weakened when it was finally displayed. Words. When the life of the projectile light bulb expires, the brightness of the projector will decrease significantly. At this time, the bulb is to be replaced. At present, the price of light bulbs is relatively high. The price of common data projector light bulbs is thousands of yuan, which is expensive. The lamp life of the backdoor color TV is much higher than that of ordinary projection. For example, the Changhong 75P series of backdrops, due to international advanced technology, have a service life of more than 20,000 hours. It is the most cost -effective product in receiving and displaying terminal equipment.

The main application areas of backdrop

1, office field. In the office meeting, when watching the computer content, you often need to connect a projector to hang the screen, and the screen is sometimes not very clear, which has a certain impact on the meeting. On the one hand, the use of the back investment is simple and convenient, and on the other hand, the size of the picture is completely in line with the requirements of the meeting. Therefore, there is currently a trend of alternative projection in the office field.

2, school multimedia application. Compared with the projector, back projection TV is relatively cheap, and the use time is long, and there is a VGA interface. The perspective is wide. It can fully meet the requirements of multimedia applications. The cost performance is higher. Therefore, many schools have established a multimedia classroom with a backstop TV as the appearance.

3, home theater. In recent years, as the audio and video concept of "home theater" has been introduced into people's lives, the number of middle -level income personnel has become increasingly large. The traditional CRT imaging tube TV, including Chunping TV, cannot exceed 38 inches due to its own technical principles. Therefore, the increase in the area of the home area and the traditional TV screen are limited, making the backstop TV the first choice in home theater construction.

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Tammy
November 27, 2022 at 6:31 pm

wholesale livestock show jewelry First, what is backstop

, as the name suggests, "back investment" is the TV that is projected behind. A TV image system that is based on the principle of projection and reflection to place the screen and projection system in one. In the projection display device, the projection display is divided into two ways: front projection (Front) and back projection. The most direct application of positive projection is the projector, which refers to the light projected to the front of the screen. The principle of back projection is simple to install the projector at the bottom of the fuselage. The signal is reflected and projected into the translucent screen back of the screen. Back -to -TV TV is the product of this principle. According to the types of projector used inside, it can be divided into two types: LCD (LCD) and DLP (digital light path processors). Due to the integration of projectors and screens, users who throw a TV do not need to adjust the system optical adjustment, which makes it more convenient to use more than the front projector.

. The technical principles of the backstop

The principle principle of back projection color TV and ordinary color TVs, but it combines projection technology on the basis of ordinary color TVs. Developed and developed. From the perspective of its working principle, the principle of the receiving part is basically the same as that of ordinary color TVs, and the biggest difference is the processing after receiving the TV signal. After receiving the video signal, the ordinary color TV signal is directly displayed on the screen by the appearance tube, and after the projection color TV receives the signal, the circuit process is processed, and then optimized by the cluster circuit and the digital filter circuit to transmit it to the red (R) that is discharged and discharged. , Green (G), Blue (B) 3 monochrome projector. The TV images generated by the three projectors were large through the lens, and the reflex was reflected into the projection screen into a complete large screen color image. The size used by ordinary color TVs is consistent with the size of the TV. For example, ordinary 25 -inch TVs use a 25 -inch appearance tube, while the back projection color TV uses 3 7 -inch small pipes. These three tubes emit red and green respectively. , Blue 3 colors of light, they are superimposed on the screen to form a complete image. That is, its basic principle is to integrate what we usually call the projector and screen.

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Salvatore
November 27, 2022 at 6:31 pm

western cowgirl jewelry wholesale To put it simply, watching TV with a magnifying glass, the disadvantage brightness, the contrast is not very ideal

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