Curved TV (curved TV) refers to a television with a certain curvature and a certain curved surface. Generally, the curvature of a curved TV is basically the same as the curvature of the eyeball.
1. Development history
In 1925, the Englishman John Lodge Baird produced the first television (parametric picture article) machine in history. When people watch a movie at the cinema, they can enjoy a good viewing effect no matter which seat they choose. This benefits from the curved surface of the movie theater - people do not feel any distortion of the cinema screen. The medical scientist gave a more scientific explanation: The lens of the human eye is a convex lens. The focal plane formed by the focal point is a spherical arc surface, not a true plane. Therefore, the curved arc television with suitable curvature is more similar to the display effect of the flat TV than the human eye can see the real scene, and does not generate picture distortion.
Curved TV is a technological masterpiece based on advanced technologies such as thinner flexible screens than flat-screen TVs. In short, the screen is not the current linear type, but creatively changes the straight line into a slightly concave curve, which presents a more stunning visual effect. Not only that, the curved TV is in line with the curved human eye structure, and it is more human-oriented in terms of ergonomics. It can bring more comfortable feeling to the human eye. The world-famous Parthenon temple in Athens was designed and built to take into account the structure of the human eye and to build the Parthenon temple into a certain arc. Because of this, the large screens in movie theaters are all curved surfaces. It can be seen that curved screens are the prior history of the best audiovisual effects.
Curved TV has opened a new era of television. From the perspective of the development of the entire television display technology, it can be said that the development of display technology has led to the development of television. Historically, this is the case. From the initial CRT TV to the later LCD and plasma, there have been some rear projections in the middle. In the last few years, the entire technology has led the development of TV technology. From backlighting all the way to LCD, 3D, UHD, and OLED products, the technology developed in 2014 to the entire curved Ultra HD LCD TV, which constitutes such a situation from the trend. From the screen point of view, from the past to the plane of the plane, and to the current surface, to provide users with a better visual experience.
In August 2013, Sony released the world's first curved LCD TV (for the first time, people realized that LCD technology can also be curved display). Today, this curved TV has been difficult to meet the needs of high-end consumer groups.
The world's first curved UHD TV was created by Samsung. Liu Heqing, a senior commentator in the home appliance industry, said, “The curved UHD TV has opened up a new development path for the industry.†He said, “HD, FHD, UHD, before the development of the TV industry fell into a strange circle of resolution alone. Samsung introduced surface technology. Enhance the visual experience from another dimension. And it is not in conflict with the previously recognized ultra-high definition, large screen, and smart technology that can be fully integrated."
2. Function preparation
Second, because the human eyeball is spherical, watching a purely flat-screen display is actually "warped," and the larger the screen size, the more obvious. The curvature of the curved television completely meets the ergonomic requirements, and the user's viewing experience is more natural. The user can really feel the cinematic screen feeling brought by the curved screen display technology, and the curved screen can achieve better viewing angles on the left and right sides. More natural, more comfortable and more outstanding on the spot.
Industry experts demonstrated five advantages of curved TVs over traditional flat TVs:
First, the arc-shaped appearance is more beautiful. Just like people prefer streamlined car appearance, arc contour mobile phones, in line with modern aesthetics.
Second, the curved surface structure can obtain a larger display area in a limited space. The 1.3-meter width space fits exactly on a 55-inch conventional tablet, but it can fit into a 58-inch curved TV.
Third, the viewing perspective is wider. The arc design increases the visible image range, and the partial screen display can also be seen at an appropriate angle from the TV side.
Fourth, bring more realistic paintings to face the field. Just like the imagery embraced by the curved IMAX screen, the 3D display is immersive.
Fifth, the human visual experience is more comfortable. Curved display, in line with the spherical characteristics of the human eyeball, can make each point on the screen reach the same distance from the eye, eliminating the visual distortion of the screen edge to create the most natural and comfortable look and feel.
3. Industry norms
The Samsung Display (SDC) surface LCD panel passed the surface display performance test of the China Electronics Industry Standards Institute of the Ministry of Industry and Information Technology (hereinafter referred to as CESI), which was the first product in the industry to pass such inspection. CESI is a professional and authoritative organization in China that formulates and manages technical standards for consumer electronics related countries and industries. According to its introduction, compared with the traditional flat-panel LCD display, SDC's 4000R curvature surface contrast ratio up to 48%. In terms of curvature, it is also the most advanced surface product in contemporary curved TV. Among them, the 4000R curvature represents the curvature of a circular arc with a radius of 4000 mm.
In addition, the technical researcher of CESI disclosed that “SDC's curved display screen has significantly improved contrast and brightness uniformity compared to flat screen displays. The super immersiveness of curved display screens has also won The certification of the three-party testing data provides scientific data for the audiovisual experience of consumers.†As a leader in the surface display market today, SDC has adopted a high-level evaluation of surface LCD panels and also established a new industry for the surface display market. Develop weathervane.
4. LCD curved TV
Misunderstanding of curved TV:
First, OLED is more suitable for curved TV than LCD
The surface is not a patent of OLED. Sony introduced the world's first 65-inch curved LED high-definition television at the IFA Berlin International Consumer Electronics Show. This TV is not an OLED panel, but is currently the mainstream LCD panel. . Most TV brands now have ultra-high-definition LCD TVs in the market.
Second, curved TV only large screen, large size
I believe many consumers believe that the curved TV has only a large screen TV with 55 inches or more.
So is it impossible for a curved TV to achieve a small screen? With the advent of Samsung's 40-inch and the first 32-inch UE32J6500 curved TV, the surface TV's bottleneck was eliminated. Currently 40-inch and 32-inch small-size curved TVs are on sale.
Third, it is not convenient to hang the wall
In fact, the curved TV can also be hung on the wall in the same way as the flat-screen TV. The rack used is also the same size. Although the curved TV screen is concave, it does not affect the hanging on the wall. When the curved TV is hung on the wall, the highest point is just a few centimeters higher than the flat TV with the same specifications. The highlights are negligible and completely negligible. Compared with flat-screen TVs, although the TV itself is slightly prominent, it can create extraordinary audio-visual effects due to its slight prominence.
four. Only in the center can be seen clearly
Compared with flat-screen TVs, the advantage of curved surfaces is that each position can take into account a better picture quality. Whether in the emperor position or in the lateral position, the curved screen will have a better viewing effect than the flat screen.
As shown in the figure, the best viewing effect can be obtained when the angle between the human eye and the screen is 90 degrees. If the viewer uses a partial viewing position, an angle difference will occur at the edges of both sides of the television. The greater the difference in the angle between the left and right sides, the lower the average quality of the viewed image quality. For example, one can see clearly and the other cannot see clearly. The situation of the curved TV is as shown in the figure. No matter whether it is in the right position or the lateral position, the angle between the left and right sides of the screen is not large, so a better visual experience than the flat screen TV can be obtained.
5. Technical advantages
First, the contrast is better
Curved TVs offer vivid quality in every corner. The brightness contrast between the left and right sides of the screen is 45% higher than that of the flat-screen TV, making the black even more pleasing and bright and bright. According to the results of CESI (China Electronics Standardization) monitoring and certification, surface televisions have been improved in brightness uniformity, contrast, and distortion rate to a different extent than flat LCD TVs.
Second, a wider perspective
Curved TVs have a wider viewing angle than traditional flat TVs. The arc design increases the visible image range, and the partial screen display can also be seen at an appropriate angle from the TV side. Bring more realistic paintings to face the field. Like the curved IMAX screen brings image envelopment and immersive reality. And human visual experience is more comfortable. Curved display, in line with the spherical characteristics of the human eyeball, can make each point on the screen reach the same distance from the eye, eliminating the visual distortion of the screen edge to create the most natural and comfortable look and feel.
With the expansion of the perspective of the screen, the sense of presence on the viewing screen also increases. This is closely related to the visual cells (cones and rod cells) located at the cornea. Cone cells are located in the center of the retina, while rod cells are located around the retina. These two types of cells are the key to our ability to recognize things through our eyes.
The human natural field of view is 20 to 30 degrees, so the cones can recognize things by stimulating the center of the retina. Expanding the field of view (that is, the angle of view) will stimulate rod cells in the periphery of the retina, which is also the key to improving immersion and enhancing the sense of presence. In addition, rod cells are more than a thousand times more sensitive than conical cells. Therefore, if the rod cells are stimulated, the eyeball can capture some brightness changes and some color differences.
Curved TV is the use of human eyeball engineering characteristics, by stimulating rod cells to expand the perspective of the screen, so that the audience when watching a stronger sense of immersion.
Third, immersive experience
Curtain TV brings you an image envelopment that resembles an arc-shaped large theater. It can be said to be a full-immersive experience, giving the viewer a sense of immersion in the cinema and immersive. The screens on both sides of the screen are designed to make the visual screen wider. Therefore, the audiovisual effect is similar to the audiovisual experience when watching a larger-sized television.
Fourth, curved TV can reduce the visual distortion
The human eyeball is a sphere, and the eye mask is also a curved surface shape. Therefore, an object in the plane may actually be bent when imaging through the eyeball. Curved surface design of curved TV screens can eliminate this visually induced bending. Eye conformity makes the eyes more comfortable. When viewing pictures on a curved television, the picture seen is more consistent with the structure of the eyes, and is more in line with humans' audiovisual habits. Such comfort is not provided by flat-screen televisions.
According to CESI, a professional authoritative organization that formulates and manages the technical standards of consumer electronics related countries and industries in China, compared with the traditional flat LCD display, Samsung's 4000R curvature (circular curvature with a radius of 4000 mm) curved LCD The contrast of the screen is increased by up to 48%, the brightness uniformity is improved by 12%, and the distortion rate is reduced by 73%. In terms of curvature, it is also the most advanced in surface curved television.
6. Technical defects
LCD screen
There are many people who think there is a misunderstanding that LCD panels are not suitable for curved TVs. This misunderstanding is due to the fact that it is not suitable for liquid crystal alignment of curved televisions. Some people may have misunderstood that the LCD screen is forced to fold into a curved surface form by physical force, so there will be technical limitations, such as the screen light or backlight uneven, in fact, these issues are not absolutely related to the use of LCD panels, Instead, the alignment of the liquid crystals should be confirmed such as VA (vertically aligned liquid crystals) and non-VA (horizontally aligned liquid crystals).
The display is roughly divided into VA screens and non-VA screens. This is the kind of LCD that is distinguished according to the arrangement of the liquid crystals. The VA panel liquid crystal molecules are arranged vertically rather than horizontally aligned with the VA panel. In flat-panel TVs, the difference between the two panels is not obvious. However, in a curved TV, when the non-VA panel liquid crystal molecules are arranged horizontally and subjected to a large external force, the arrangement becomes distorted with the curvature of the screen, and the liquid crystal molecules arranged vertically in the VA panel are not arranged in an orderly manner.
Non-VA horizontal alignment of the liquid crystal molecules in the curved state after the deformation will make the screen display a lot of problems. Such as the screen light, uneven backlight, and so on. The curved TV of the VA panel does not have these problems, and has the advantage of a natural curved surface and the most suitable technique for a curved television.
OLED screen
Today, many OLED curved TVs can be seen in the market, but OLED technology has not yet fully matured. It is difficult to draw conclusions on the question of service life. OLED display technology in the screen more than 20,30 inches, to TV panel size, OLED problems are many, many years have not been resolved, such as the short life of the light, not natural and other technical constraints, so OLED Today, there are truly small-screen areas under 10 inches, such as smart phones and small-sized display devices.
OLED technology has attracted much attention as a future display technology. Many companies are making efforts to introduce OLED technology. However, due to problems such as uncertain technical routes and low yields of large-size OLEDs such as TVs, it has been difficult to produce in large quantities.
Compared with OLED technology, LCD technology is mature, and can also achieve curved surface effects, which is the main reason for LCD TV manufacturers to launch curved TV.
1. Development history
In 1925, the Englishman John Lodge Baird produced the first television (parametric picture article) machine in history. When people watch a movie at the cinema, they can enjoy a good viewing effect no matter which seat they choose. This benefits from the curved surface of the movie theater - people do not feel any distortion of the cinema screen. The medical scientist gave a more scientific explanation: The lens of the human eye is a convex lens. The focal plane formed by the focal point is a spherical arc surface, not a true plane. Therefore, the curved arc television with suitable curvature is more similar to the display effect of the flat TV than the human eye can see the real scene, and does not generate picture distortion.
Curved TV is a technological masterpiece based on advanced technologies such as thinner flexible screens than flat-screen TVs. In short, the screen is not the current linear type, but creatively changes the straight line into a slightly concave curve, which presents a more stunning visual effect. Not only that, the curved TV is in line with the curved human eye structure, and it is more human-oriented in terms of ergonomics. It can bring more comfortable feeling to the human eye. The world-famous Parthenon temple in Athens was designed and built to take into account the structure of the human eye and to build the Parthenon temple into a certain arc. Because of this, the large screens in movie theaters are all curved surfaces. It can be seen that curved screens are the prior history of the best audiovisual effects.
Curved TV has opened a new era of television. From the perspective of the development of the entire television display technology, it can be said that the development of display technology has led to the development of television. Historically, this is the case. From the initial CRT TV to the later LCD and plasma, there have been some rear projections in the middle. In the last few years, the entire technology has led the development of TV technology. From backlighting all the way to LCD, 3D, UHD, and OLED products, the technology developed in 2014 to the entire curved Ultra HD LCD TV, which constitutes such a situation from the trend. From the screen point of view, from the past to the plane of the plane, and to the current surface, to provide users with a better visual experience.
In August 2013, Sony released the world's first curved LCD TV (for the first time, people realized that LCD technology can also be curved display). Today, this curved TV has been difficult to meet the needs of high-end consumer groups.
The world's first curved UHD TV was created by Samsung. Liu Heqing, a senior commentator in the home appliance industry, said, “The curved UHD TV has opened up a new development path for the industry.†He said, “HD, FHD, UHD, before the development of the TV industry fell into a strange circle of resolution alone. Samsung introduced surface technology. Enhance the visual experience from another dimension. And it is not in conflict with the previously recognized ultra-high definition, large screen, and smart technology that can be fully integrated."
2. Function preparation
Second, because the human eyeball is spherical, watching a purely flat-screen display is actually "warped," and the larger the screen size, the more obvious. The curvature of the curved television completely meets the ergonomic requirements, and the user's viewing experience is more natural. The user can really feel the cinematic screen feeling brought by the curved screen display technology, and the curved screen can achieve better viewing angles on the left and right sides. More natural, more comfortable and more outstanding on the spot.
Industry experts demonstrated five advantages of curved TVs over traditional flat TVs:
First, the arc-shaped appearance is more beautiful. Just like people prefer streamlined car appearance, arc contour mobile phones, in line with modern aesthetics.
Second, the curved surface structure can obtain a larger display area in a limited space. The 1.3-meter width space fits exactly on a 55-inch conventional tablet, but it can fit into a 58-inch curved TV.
Third, the viewing perspective is wider. The arc design increases the visible image range, and the partial screen display can also be seen at an appropriate angle from the TV side.
Fourth, bring more realistic paintings to face the field. Just like the imagery embraced by the curved IMAX screen, the 3D display is immersive.
Fifth, the human visual experience is more comfortable. Curved display, in line with the spherical characteristics of the human eyeball, can make each point on the screen reach the same distance from the eye, eliminating the visual distortion of the screen edge to create the most natural and comfortable look and feel.
3. Industry norms
The Samsung Display (SDC) surface LCD panel passed the surface display performance test of the China Electronics Industry Standards Institute of the Ministry of Industry and Information Technology (hereinafter referred to as CESI), which was the first product in the industry to pass such inspection. CESI is a professional and authoritative organization in China that formulates and manages technical standards for consumer electronics related countries and industries. According to its introduction, compared with the traditional flat-panel LCD display, SDC's 4000R curvature surface contrast ratio up to 48%. In terms of curvature, it is also the most advanced surface product in contemporary curved TV. Among them, the 4000R curvature represents the curvature of a circular arc with a radius of 4000 mm.
In addition, the technical researcher of CESI disclosed that “SDC's curved display screen has significantly improved contrast and brightness uniformity compared to flat screen displays. The super immersiveness of curved display screens has also won The certification of the three-party testing data provides scientific data for the audiovisual experience of consumers.†As a leader in the surface display market today, SDC has adopted a high-level evaluation of surface LCD panels and also established a new industry for the surface display market. Develop weathervane.
4. LCD curved TV
Misunderstanding of curved TV:
First, OLED is more suitable for curved TV than LCD
The surface is not a patent of OLED. Sony introduced the world's first 65-inch curved LED high-definition television at the IFA Berlin International Consumer Electronics Show. This TV is not an OLED panel, but is currently the mainstream LCD panel. . Most TV brands now have ultra-high-definition LCD TVs in the market.
Second, curved TV only large screen, large size
I believe many consumers believe that the curved TV has only a large screen TV with 55 inches or more.
So is it impossible for a curved TV to achieve a small screen? With the advent of Samsung's 40-inch and the first 32-inch UE32J6500 curved TV, the surface TV's bottleneck was eliminated. Currently 40-inch and 32-inch small-size curved TVs are on sale.
Third, it is not convenient to hang the wall
In fact, the curved TV can also be hung on the wall in the same way as the flat-screen TV. The rack used is also the same size. Although the curved TV screen is concave, it does not affect the hanging on the wall. When the curved TV is hung on the wall, the highest point is just a few centimeters higher than the flat TV with the same specifications. The highlights are negligible and completely negligible. Compared with flat-screen TVs, although the TV itself is slightly prominent, it can create extraordinary audio-visual effects due to its slight prominence.
four. Only in the center can be seen clearly
Compared with flat-screen TVs, the advantage of curved surfaces is that each position can take into account a better picture quality. Whether in the emperor position or in the lateral position, the curved screen will have a better viewing effect than the flat screen.
As shown in the figure, the best viewing effect can be obtained when the angle between the human eye and the screen is 90 degrees. If the viewer uses a partial viewing position, an angle difference will occur at the edges of both sides of the television. The greater the difference in the angle between the left and right sides, the lower the average quality of the viewed image quality. For example, one can see clearly and the other cannot see clearly. The situation of the curved TV is as shown in the figure. No matter whether it is in the right position or the lateral position, the angle between the left and right sides of the screen is not large, so a better visual experience than the flat screen TV can be obtained.
5. Technical advantages
First, the contrast is better
Curved TVs offer vivid quality in every corner. The brightness contrast between the left and right sides of the screen is 45% higher than that of the flat-screen TV, making the black even more pleasing and bright and bright. According to the results of CESI (China Electronics Standardization) monitoring and certification, surface televisions have been improved in brightness uniformity, contrast, and distortion rate to a different extent than flat LCD TVs.
Second, a wider perspective
Curved TVs have a wider viewing angle than traditional flat TVs. The arc design increases the visible image range, and the partial screen display can also be seen at an appropriate angle from the TV side. Bring more realistic paintings to face the field. Like the curved IMAX screen brings image envelopment and immersive reality. And human visual experience is more comfortable. Curved display, in line with the spherical characteristics of the human eyeball, can make each point on the screen reach the same distance from the eye, eliminating the visual distortion of the screen edge to create the most natural and comfortable look and feel.
With the expansion of the perspective of the screen, the sense of presence on the viewing screen also increases. This is closely related to the visual cells (cones and rod cells) located at the cornea. Cone cells are located in the center of the retina, while rod cells are located around the retina. These two types of cells are the key to our ability to recognize things through our eyes.
Figure 5: Relationship between eyeball structure and perspective
The human natural field of view is 20 to 30 degrees, so the cones can recognize things by stimulating the center of the retina. Expanding the field of view (that is, the angle of view) will stimulate rod cells in the periphery of the retina, which is also the key to improving immersion and enhancing the sense of presence. In addition, rod cells are more than a thousand times more sensitive than conical cells. Therefore, if the rod cells are stimulated, the eyeball can capture some brightness changes and some color differences.
Curved TV is the use of human eyeball engineering characteristics, by stimulating rod cells to expand the perspective of the screen, so that the audience when watching a stronger sense of immersion.
Third, immersive experience
Curtain TV brings you an image envelopment that resembles an arc-shaped large theater. It can be said to be a full-immersive experience, giving the viewer a sense of immersion in the cinema and immersive. The screens on both sides of the screen are designed to make the visual screen wider. Therefore, the audiovisual effect is similar to the audiovisual experience when watching a larger-sized television.
Fourth, curved TV can reduce the visual distortion
The human eyeball is a sphere, and the eye mask is also a curved surface shape. Therefore, an object in the plane may actually be bent when imaging through the eyeball. Curved surface design of curved TV screens can eliminate this visually induced bending. Eye conformity makes the eyes more comfortable. When viewing pictures on a curved television, the picture seen is more consistent with the structure of the eyes, and is more in line with humans' audiovisual habits. Such comfort is not provided by flat-screen televisions.
According to CESI, a professional authoritative organization that formulates and manages the technical standards of consumer electronics related countries and industries in China, compared with the traditional flat LCD display, Samsung's 4000R curvature (circular curvature with a radius of 4000 mm) curved LCD The contrast of the screen is increased by up to 48%, the brightness uniformity is improved by 12%, and the distortion rate is reduced by 73%. In terms of curvature, it is also the most advanced in surface curved television.
6. Technical defects
LCD screen
There are many people who think there is a misunderstanding that LCD panels are not suitable for curved TVs. This misunderstanding is due to the fact that it is not suitable for liquid crystal alignment of curved televisions. Some people may have misunderstood that the LCD screen is forced to fold into a curved surface form by physical force, so there will be technical limitations, such as the screen light or backlight uneven, in fact, these issues are not absolutely related to the use of LCD panels, Instead, the alignment of the liquid crystals should be confirmed such as VA (vertically aligned liquid crystals) and non-VA (horizontally aligned liquid crystals).
The display is roughly divided into VA screens and non-VA screens. This is the kind of LCD that is distinguished according to the arrangement of the liquid crystals. The VA panel liquid crystal molecules are arranged vertically rather than horizontally aligned with the VA panel. In flat-panel TVs, the difference between the two panels is not obvious. However, in a curved TV, when the non-VA panel liquid crystal molecules are arranged horizontally and subjected to a large external force, the arrangement becomes distorted with the curvature of the screen, and the liquid crystal molecules arranged vertically in the VA panel are not arranged in an orderly manner.
VA (right) vs. non-VA (left) liquid crystal alignment
Non-VA horizontal alignment of the liquid crystal molecules in the curved state after the deformation will make the screen display a lot of problems. Such as the screen light, uneven backlight, and so on. The curved TV of the VA panel does not have these problems, and has the advantage of a natural curved surface and the most suitable technique for a curved television.
OLED screen
Today, many OLED curved TVs can be seen in the market, but OLED technology has not yet fully matured. It is difficult to draw conclusions on the question of service life. OLED display technology in the screen more than 20,30 inches, to TV panel size, OLED problems are many, many years have not been resolved, such as the short life of the light, not natural and other technical constraints, so OLED Today, there are truly small-screen areas under 10 inches, such as smart phones and small-sized display devices.
OLED technology has attracted much attention as a future display technology. Many companies are making efforts to introduce OLED technology. However, due to problems such as uncertain technical routes and low yields of large-size OLEDs such as TVs, it has been difficult to produce in large quantities.
Compared with OLED technology, LCD technology is mature, and can also achieve curved surface effects, which is the main reason for LCD TV manufacturers to launch curved TV.