At present, the technology direction of mainstream TV manufacturers mainly includes qled, 8K and OLED. Samsung focuses on 8K and qled, and LG frequently works on OLED. Sony is more focused on OLED products, and has the rhythm to strengthen its 8K products. Picture quality is the most concerned aspect for most people to buy TV, and it is also an important selling point for many TV manufacturers. Common measurement standards mainly include image quality processing chip, color performance, motion compensation, screen brightness, light control area, screen refresh rate, etc. the following is a brief introduction of the six elements that determine TV image quality.
Image quality processing chip
The difference is that there are chips in smart TV (also the x-core and x-main frequency chips that are widely advertised in the market). Many TV sets also have special chips to optimize the picture quality of TV sets. At present, only a few manufacturers, such as Sony, Samsung, LG, Hisense, etc., have the ownership of the image quality chip, which has a huge impact on the image quality of TV sets.
Sony TV's excellent picture quality is largely due to Sony's standard picture quality chip from the mid-range 8500 series and above, but different versions are used according to different positioning. X1 chip mainly includes HDR dynamic item by item remodeling technology, dual image database, 4K HDR 14 bit smooth gradient technology, which can intelligently optimize the definition, brightness, contrast, color of the picture, and present a more realistic and delicate display effect.
At present, the strongest chip is the flagship 8K HDR chip that supports 8K video optimization. Dafa has many chip models, and the strongest chip processing will be used in top products. For example, the 8K image processing chip X1 is used in the flagship LCD TV z9g series, the 4K image processing chip X1 is used in the flagship OLED TV a9g series and the sub flagship LCD TV x9500g series.
At present, the performance order of Sony image quality chips is: 8K image processing chip X1 flagship > 4K image processing chip X1 flagship > 4K image processing chip X1 advanced > 4K image processing chip x1.
Color expression
Color performance is determined by many factors, and three dimensions of gamut performance, color accuracy and color depth are mainly considered in daily life. Generally speaking, the wider the gamut, the better. The gamut contains more color performance, which can better present the image quality of video. Because there is no uniform standard for gamut range, the gamut range under different standards is quite different. There are many common gamut standards, including NTSC, sRGB, bt.709, bt.2020 and dci-p3. Different standards cover different gamut ranges. When you understand the color gamut, you must know which standard is used by TV manufacturers to measure. If you have high requirements for picture quality, you should try to choose a wide color gamut TV (take NTSC standard as an example, if the color gamut exceeds 82% NTSC, we can call it a wide color gamut TV).
100% sRGB≈72% NTSC
100% BT.709≈72% NTSC
100% BT.2020≈150% NTSC
100% DCI-P3≈96% NTSC.
Color accuracy is the color accuracy, which is a measure of the color accuracy of display equipment, generally expressed by Δ E. Δ e reflects the difference between TV color and standard value. The smaller the value is, the smaller the color distortion is and the better the color accuracy performance is. Color depth, also known as color bit depth, refers to the number of colors contained in a single pixel at a certain resolution. The deeper the color, the more natural the color transition. Relatively speaking, when purchasing non professional home TV sets, color performance mainly focuses on gamut performance.
Motion flow (MEMC)
The screen response time of traditional LCD TV is relatively long (OLED congenital has obvious advantages), many sports scenes will appear the phenomenon of blocking and dragging. In order to solve this problem, LCD TV manufacturers have introduced motion compensation function (different names, most of which are MEMC and Sony are motion flow). By inserting black frame / copy frame / prediction frame and other ways to improve the picture fluency, reduce the situation of jamming and dragging. MEMC is an important standard to distinguish the low-end LCD TV. At the same time, different positioning TV uses different MEMC technology. To play host games, watch sports games and action movie fans, MEMC functions must be available, otherwise it will greatly affect the experience. Interestingly, in 2020, many flagship mobile phones began to bring their own MEMC functions. However, TVs that need this function even more have not yet realized the standard configuration.
Screen brightness
High brightness can bring better detail performance, brightness is also an important standard to measure the level of TV, generally measured by its peak brightness. The peak brightness of the top LCD TV can easily reach more than 1000nit, the brightness of the medium and high-end LCD TV can reach about 700nit, and the peak brightness of the ordinary LCD TV is generally around 500nit. The overall difference is relatively large. In 2019, the peak brightness of Samsung's flagship TV q900r series reached 4000nit, and that of Dafa's z9g exceeded 4000nit.
Light control zone
Due to the inability of self illumination, LCD TV needs not only panel and image quality processing chip, but also the participation of light control technology. In order to achieve high contrast of the picture, accurate light control partition is needed. The light control partition realized by hardware mainly includes two ways: direct down type and side in type. The side entry area light control is strip-shaped, because there are few areas, the brightness of different positions cannot be precisely adjusted. Generally, there are many side entry zone light control models in the middle and low-end models. The direct down type area light control is chessboard like, with many areas, which is not easy to affect different areas. It can independently and accurately control each backlight unit, and the overall control ability is more accurate. Generally, high-end models and low-end models use direct down type zone light control more. The direct down type without partition is inferior to the side in type. All low-end and high-end products have a large number of direct down type TVs.
Screen refresh rate
The screen refresh rate indicates the number of pictures the TV can refresh in one second. The higher the refresh rate, the more photos you refresh, the smoother the TV picture. At present, the refresh rate of most TV screens is 60Hz, and the refresh rate of high-end TV screens can reach 120Hz. High refresh rate and MEMC technology can bring more smooth picture experience.
Image quality processing chip
The difference is that there are chips in smart TV (also the x-core and x-main frequency chips that are widely advertised in the market). Many TV sets also have special chips to optimize the picture quality of TV sets. At present, only a few manufacturers, such as Sony, Samsung, LG, Hisense, etc., have the ownership of the image quality chip, which has a huge impact on the image quality of TV sets.
Sony TV's excellent picture quality is largely due to Sony's standard picture quality chip from the mid-range 8500 series and above, but different versions are used according to different positioning. X1 chip mainly includes HDR dynamic item by item remodeling technology, dual image database, 4K HDR 14 bit smooth gradient technology, which can intelligently optimize the definition, brightness, contrast, color of the picture, and present a more realistic and delicate display effect.
At present, the strongest chip is the flagship 8K HDR chip that supports 8K video optimization. Dafa has many chip models, and the strongest chip processing will be used in top products. For example, the 8K image processing chip X1 is used in the flagship LCD TV z9g series, the 4K image processing chip X1 is used in the flagship OLED TV a9g series and the sub flagship LCD TV x9500g series.
At present, the performance order of Sony image quality chips is: 8K image processing chip X1 flagship > 4K image processing chip X1 flagship > 4K image processing chip X1 advanced > 4K image processing chip x1.
Color expression
Color performance is determined by many factors, and three dimensions of gamut performance, color accuracy and color depth are mainly considered in daily life. Generally speaking, the wider the gamut, the better. The gamut contains more color performance, which can better present the image quality of video. Because there is no uniform standard for gamut range, the gamut range under different standards is quite different. There are many common gamut standards, including NTSC, sRGB, bt.709, bt.2020 and dci-p3. Different standards cover different gamut ranges. When you understand the color gamut, you must know which standard is used by TV manufacturers to measure. If you have high requirements for picture quality, you should try to choose a wide color gamut TV (take NTSC standard as an example, if the color gamut exceeds 82% NTSC, we can call it a wide color gamut TV).
100% sRGB≈72% NTSC
100% BT.709≈72% NTSC
100% BT.2020≈150% NTSC
100% DCI-P3≈96% NTSC.
Color accuracy is the color accuracy, which is a measure of the color accuracy of display equipment, generally expressed by Δ E. Δ e reflects the difference between TV color and standard value. The smaller the value is, the smaller the color distortion is and the better the color accuracy performance is. Color depth, also known as color bit depth, refers to the number of colors contained in a single pixel at a certain resolution. The deeper the color, the more natural the color transition. Relatively speaking, when purchasing non professional home TV sets, color performance mainly focuses on gamut performance.
Motion flow (MEMC)
The screen response time of traditional LCD TV is relatively long (OLED congenital has obvious advantages), many sports scenes will appear the phenomenon of blocking and dragging. In order to solve this problem, LCD TV manufacturers have introduced motion compensation function (different names, most of which are MEMC and Sony are motion flow). By inserting black frame / copy frame / prediction frame and other ways to improve the picture fluency, reduce the situation of jamming and dragging. MEMC is an important standard to distinguish the low-end LCD TV. At the same time, different positioning TV uses different MEMC technology. To play host games, watch sports games and action movie fans, MEMC functions must be available, otherwise it will greatly affect the experience. Interestingly, in 2020, many flagship mobile phones began to bring their own MEMC functions. However, TVs that need this function even more have not yet realized the standard configuration.
Screen brightness
High brightness can bring better detail performance, brightness is also an important standard to measure the level of TV, generally measured by its peak brightness. The peak brightness of the top LCD TV can easily reach more than 1000nit, the brightness of the medium and high-end LCD TV can reach about 700nit, and the peak brightness of the ordinary LCD TV is generally around 500nit. The overall difference is relatively large. In 2019, the peak brightness of Samsung's flagship TV q900r series reached 4000nit, and that of Dafa's z9g exceeded 4000nit.
Light control zone
Due to the inability of self illumination, LCD TV needs not only panel and image quality processing chip, but also the participation of light control technology. In order to achieve high contrast of the picture, accurate light control partition is needed. The light control partition realized by hardware mainly includes two ways: direct down type and side in type. The side entry area light control is strip-shaped, because there are few areas, the brightness of different positions cannot be precisely adjusted. Generally, there are many side entry zone light control models in the middle and low-end models. The direct down type area light control is chessboard like, with many areas, which is not easy to affect different areas. It can independently and accurately control each backlight unit, and the overall control ability is more accurate. Generally, high-end models and low-end models use direct down type zone light control more. The direct down type without partition is inferior to the side in type. All low-end and high-end products have a large number of direct down type TVs.
Screen refresh rate
The screen refresh rate indicates the number of pictures the TV can refresh in one second. The higher the refresh rate, the more photos you refresh, the smoother the TV picture. At present, the refresh rate of most TV screens is 60Hz, and the refresh rate of high-end TV screens can reach 120Hz. High refresh rate and MEMC technology can bring more smooth picture experience.
