Some common sense you must know before buying a Smart TV
Friends who are concerned about display technology know that at this year's CES2016 show, both the X93D series released by Sony, the G6 and E6 from LG, and the UH series with relatively low positioning all focus on HDR, and displays equipped with HDR technology are also Will be popularized. All of a sudden, people are still unfamiliar with HDR technology and are quietly moving to the front desk. Let's take a look at the HDR display today. And the development of this technology will inevitably affect our daily entertainment life.
1. Clearer HDR technology
HDR (High-Dynamic Range) was translated as "High Dynamic Range Display Technology". The term was originally mentioned in the photography field. It is a technology that can enhance the dynamic range of a photo, that is, the brightest white and the darkest. The contrast between black. For example, iPhone supports HDR shooting. It can take 3 different exposure photos and synthesize them with HDR technology to get better photos. It can be seen that HDR synthesized photos have higher definition and stronger layering. .
The HDR technology on the display device is similar. The difference is that it implements the HDR effect directly through the display device processing unit, rather than through software post-synthesis.
For example, HDR effects on these iPhone devices are similar to the way we usually use Photoshop to modify photos on a PC to have SLR effects. HDR TVs are equivalent to SLR cameras, and they are shot directly as SLR photos. Devices using HDR technology can make the screen display clear in both highlights and shadows, giving us better visual effects.
Through the above introduction, we know that display devices using HDR technology have a clearer display effect. So what is behind HDR HD display?
First of all, support for HDR display devices has a wider dynamic range, so that a variety of different brightness can be completely presented. HDR-enabled TVs have a higher dynamic range than ordinary TVs. Dynamic range refers to the highest overall contrast that can be found in an image. Usually we use a ratio, such as "200:1", "400:1", etc. This value depends on the full range of brightness and the minimum brightness level. Obviously, the larger the dynamic range is, the better the display contrast and color accuracy are. The most intuitive feeling is that the image (or image) appears to be clearer, the sense of hierarchy is stronger, and the color is more abundant.
Second, HDR technology can display richer information. For ordinary television, in order to meet the technical ceiling of TV, the TV image processing unit will drastically reduce the amount of image information. In brightness, the average television brightness is generally between 500 nits and 1000 nits, so that the details of the highlights and dark parts of the picture cannot be displayed. A TV that supports HDR can reach 5000 nits, and its brightness is much higher than that of ordinary TVs.
Of course, HDR is not intended to simply increase the brightness of the TV. The purpose of increasing the brightness is to widen the image display range so as to better present the light and shadow. In this way, we can see both the shadows and the details of the highlights. For example, under bright light, the scene will not be as dazzling, the colors will be more full and true, the gradient of the hue will also be more delicate, and the details that were originally shown in the shadow are more clear, and HDR can present more natural and real images.
In short, HDR greatly improves the contrast and color accuracy by increasing the display device's dynamic range, brightness, and other parameters. The bright part of the picture will become brighter, making it look more “deepâ€, while the color accuracy is improved. It will make blue, green, red and all colors between them look brighter and purer, and the color transition will be more real and natural.
Third, the difference between HDR and UHD
With the popularity of 4K display devices, we often hear the term UHD, UHD is ultra-high resolution, and we understand it as 4K resolution. Its main role is to significantly increase the number of pixels, which is what we often say on the PC to improve the display resolution, 4K resolution can reach 4096x2160.
The main role of HDR is to make pixels more accurate and rich. It has nothing to do with the resolution, that is, HDR allows them to display with devices that do not support HDR, whether it is on 2K or 4K resolution display devices. Good display effect. Of course, HDR and UHD can achieve close cooperation. The HDR TVs that have been announced at present all support 4K UHD.
According to scientists, our human eye is actually a “super camera†with 576 million pixels. We see objects and images in daily life better than the current top display devices. With the advancement of display technology, people's requirements for display quality are getting higher and higher, especially those who like to watch movies.
For example, most quality friends like to watch Blu-ray high-definition movies, and now the new 4K Blu-ray movies also list HDR as a standard technology. Obviously, the combination of 4K and HDR means that ultra-high-definition, ultra-high dynamic images are coming. It will be faster than the current The 1080p Full HD has a clearer, more layered display. In this way, the future 4K HDR display effect will allow us to have a visual effect closer to the real effect when watching a movie.
Of course, ultra-high definition display will also bring better display effect in our daily video chat and online shopping, adding more fun to our lives. For example, when shopping online, an HD photo that is closer to real objects can obviously make us have a more intuitive and emotional understanding of the purchased items.
However, it should be noted that it cannot be said that the performance of HDR display devices is necessarily better than that of non-HDR devices. In order to truly achieve ultra high-definition display effects, in addition to HDR hardware requirements, video support is also required. For example, HDR TVs require HDR content can highlight its value.
1. Clearer HDR technology
HDR (High-Dynamic Range) was translated as "High Dynamic Range Display Technology". The term was originally mentioned in the photography field. It is a technology that can enhance the dynamic range of a photo, that is, the brightest white and the darkest. The contrast between black. For example, iPhone supports HDR shooting. It can take 3 different exposure photos and synthesize them with HDR technology to get better photos. It can be seen that HDR synthesized photos have higher definition and stronger layering. .
Comparison of effects before and after HDR processing on the iPhone
The HDR technology on the display device is similar. The difference is that it implements the HDR effect directly through the display device processing unit, rather than through software post-synthesis.
For example, HDR effects on these iPhone devices are similar to the way we usually use Photoshop to modify photos on a PC to have SLR effects. HDR TVs are equivalent to SLR cameras, and they are shot directly as SLR photos. Devices using HDR technology can make the screen display clear in both highlights and shadows, giving us better visual effects.
Sony X93D TV with HDR support
Second, HDR display technology exploration Through the above introduction, we know that display devices using HDR technology have a clearer display effect. So what is behind HDR HD display?
First of all, support for HDR display devices has a wider dynamic range, so that a variety of different brightness can be completely presented. HDR-enabled TVs have a higher dynamic range than ordinary TVs. Dynamic range refers to the highest overall contrast that can be found in an image. Usually we use a ratio, such as "200:1", "400:1", etc. This value depends on the full range of brightness and the minimum brightness level. Obviously, the larger the dynamic range is, the better the display contrast and color accuracy are. The most intuitive feeling is that the image (or image) appears to be clearer, the sense of hierarchy is stronger, and the color is more abundant.
HDR display contrast
Second, HDR technology can display richer information. For ordinary television, in order to meet the technical ceiling of TV, the TV image processing unit will drastically reduce the amount of image information. In brightness, the average television brightness is generally between 500 nits and 1000 nits, so that the details of the highlights and dark parts of the picture cannot be displayed. A TV that supports HDR can reach 5000 nits, and its brightness is much higher than that of ordinary TVs.
Of course, HDR is not intended to simply increase the brightness of the TV. The purpose of increasing the brightness is to widen the image display range so as to better present the light and shadow. In this way, we can see both the shadows and the details of the highlights. For example, under bright light, the scene will not be as dazzling, the colors will be more full and true, the gradient of the hue will also be more delicate, and the details that were originally shown in the shadow are more clear, and HDR can present more natural and real images.
HDR shows better results with higher brightness
In short, HDR greatly improves the contrast and color accuracy by increasing the display device's dynamic range, brightness, and other parameters. The bright part of the picture will become brighter, making it look more “deepâ€, while the color accuracy is improved. It will make blue, green, red and all colors between them look brighter and purer, and the color transition will be more real and natural.
Third, the difference between HDR and UHD
With the popularity of 4K display devices, we often hear the term UHD, UHD is ultra-high resolution, and we understand it as 4K resolution. Its main role is to significantly increase the number of pixels, which is what we often say on the PC to improve the display resolution, 4K resolution can reach 4096x2160.
The main role of HDR is to make pixels more accurate and rich. It has nothing to do with the resolution, that is, HDR allows them to display with devices that do not support HDR, whether it is on 2K or 4K resolution display devices. Good display effect. Of course, HDR and UHD can achieve close cooperation. The HDR TVs that have been announced at present all support 4K UHD.
LGEC9700 TV with UHD HDR support
HDR gives us better visual enjoyment According to scientists, our human eye is actually a “super camera†with 576 million pixels. We see objects and images in daily life better than the current top display devices. With the advancement of display technology, people's requirements for display quality are getting higher and higher, especially those who like to watch movies.
For example, most quality friends like to watch Blu-ray high-definition movies, and now the new 4K Blu-ray movies also list HDR as a standard technology. Obviously, the combination of 4K and HDR means that ultra-high-definition, ultra-high dynamic images are coming. It will be faster than the current The 1080p Full HD has a clearer, more layered display. In this way, the future 4K HDR display effect will allow us to have a visual effect closer to the real effect when watching a movie.
Blu-ray 4K HDR Movie
Of course, ultra-high definition display will also bring better display effect in our daily video chat and online shopping, adding more fun to our lives. For example, when shopping online, an HD photo that is closer to real objects can obviously make us have a more intuitive and emotional understanding of the purchased items.
However, it should be noted that it cannot be said that the performance of HDR display devices is necessarily better than that of non-HDR devices. In order to truly achieve ultra high-definition display effects, in addition to HDR hardware requirements, video support is also required. For example, HDR TVs require HDR content can highlight its value.
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