In many cases, people are accustomed to comparing the advantages and disadvantages of the technology in the order in which it emerges, and to the embrace of emerging technologies in a posture that conforms to the trend. In the TV market in the past two years, the development of OLED has brought the trend of “Future†to replace LCD.
Compared with LCD, OLED display performance is really better? Is the fate of the LCD being shot on the beach really no room for manoeuvre? According to the general storyline, at the crucial moment of survival, there will always be some warriors who domineering with their bright-eyed weapons and tell undoubtedly which of the unknown truths are happy to follow the flow of the people: this is not the case. ,Dear.
This time, the appearance of Sony and its "black technology" - Backlight Master Drive, dynamic backlight system master version.
From the concept: LCD and OLED, SDR and HDR
The LCD, which is often referred to as a liquid crystal display, adopts liquid crystal control transmittance technology to realize color display.
OLED, or organic light emitting diode, also known as organic electro-laser display technology, uses a very thin organic material coating and a glass substrate, and can exhibit self-luminescence upon power-on. This is also the fundamental difference between LCD and OLED - OLED is self-luminous, and LCD needs to be illuminated by the backlight to display.
So, what is the difference between self-luminescence and non-self-luminescence? To make an inappropriate analogy, you can think of it as the difference between the sun and the moon. The moon can only reflect sunlight and its brightness is very limited. Compared with LCD, this feature of OLED brings it higher luminous efficiency and better contrast.
Here, we must mention another concept - brightness dynamic range. It can be simply understood as the maximum luminance range that the display device can provide, which is an important parameter for measuring the video quality. With this concept in mind, we can summarize all of the above explanations: In principle, OLED technology has a higher brightness dynamic range than LCD.
Even if you are not familiar with the parameter of luminance dynamic range, you must have heard about its metrics - the SDR that lasted for 50 years and the recently popular HDR. In order to meet the demand of the human visual system for ambient light perception, Sony proposed its own HDR format, which can achieve a performance of 10 nits of 5th power, which is the typical dynamic range of brightness that human vision can accept.
What needs special emphasis is that HDR can not only bring greater brightness dynamic range but also more abundant colors to a certain kind of technology. In other words, HDR creates a larger coordinate system than SDR to reproduce a larger color gamut and a higher brightness dynamic range.
Backlight Master Drive: Get close to RGB OLED effects on large LCD TVs
In theory, OLED technology can indeed show a greater degree of natural color. Is it not a matter of course that such a good technology should become a market trend? The actual situation is not so simple.
According to Zhou Zhenyu, Sony China home display product manager, most of the OLED TVs on the market use white light OLEDs, which are completely different from RGB OLED technologies. White light OLEDs cannot display the complete color space that OLEDs can theoretically achieve. . The majority of OLED TVs on the market use white light OLED technology because RGB OLED technology is very costly and does not do much. According to him, the cost of a master tape reference and monitor using RGB OLED technology is only close to 300,000 yuan.
Whether it is in the brightness range, white balance, color control or color gamut control, for the TV, RGB OLED performance is benchmarking. There is a big gap between ordinary LCD TVs, and even with the use of local light control technology, LCD TVs can achieve very good brightness level control in the processing of dark scenes, thereby maintaining the original color of the screen and excellent whiteness. balance. Unfortunately, the brightness is still not in the ideal range.
In order for LCD TVs to achieve near-RGB OLED effects, improvements in backlight system technology are necessary. This is also the original intention of Sony HDR Black Technology - Backlight Master Drive.
It is reported that this system uses a new optical design, can effectively control the overflow of the adjacent LED lights, while using ultra-high brightness LED backlight and high-density direct-type LED backlight source, equipped with advanced driving algorithms to Optimize energy consumption.
In the demonstration video playback comparison, Electro-Technology found that the color and brightness of the Sony Backlight Master Drive prototype are very similar to that of a master reference RGB OLED monitor. In contrast, another white LED TV set is from color. The reduction and picture performance are much less, especially in the performance of the highlight picture.
Since this demonstration is only a prototype of the technology, it is impossible for people to intuitively feel the difference in the picture through photos. Relevant person in charge revealed that Sony is actively assessing and evaluating, and strive to deploy this technology into the product as soon as possible. Zhou Zhenyu believes, "With Backlight Master Drive technology, you can get and close to OLED on the large-size LCD TV contrast and color display, so the LCD will still be the mainstream trend in the next few years."
Compared with LCD, OLED display performance is really better? Is the fate of the LCD being shot on the beach really no room for manoeuvre? According to the general storyline, at the crucial moment of survival, there will always be some warriors who domineering with their bright-eyed weapons and tell undoubtedly which of the unknown truths are happy to follow the flow of the people: this is not the case. ,Dear.
This time, the appearance of Sony and its "black technology" - Backlight Master Drive, dynamic backlight system master version.
From the concept: LCD and OLED, SDR and HDR
The LCD, which is often referred to as a liquid crystal display, adopts liquid crystal control transmittance technology to realize color display.
OLED, or organic light emitting diode, also known as organic electro-laser display technology, uses a very thin organic material coating and a glass substrate, and can exhibit self-luminescence upon power-on. This is also the fundamental difference between LCD and OLED - OLED is self-luminous, and LCD needs to be illuminated by the backlight to display.
So, what is the difference between self-luminescence and non-self-luminescence? To make an inappropriate analogy, you can think of it as the difference between the sun and the moon. The moon can only reflect sunlight and its brightness is very limited. Compared with LCD, this feature of OLED brings it higher luminous efficiency and better contrast.
Here, we must mention another concept - brightness dynamic range. It can be simply understood as the maximum luminance range that the display device can provide, which is an important parameter for measuring the video quality. With this concept in mind, we can summarize all of the above explanations: In principle, OLED technology has a higher brightness dynamic range than LCD.
Even if you are not familiar with the parameter of luminance dynamic range, you must have heard about its metrics - the SDR that lasted for 50 years and the recently popular HDR. In order to meet the demand of the human visual system for ambient light perception, Sony proposed its own HDR format, which can achieve a performance of 10 nits of 5th power, which is the typical dynamic range of brightness that human vision can accept.
What needs special emphasis is that HDR can not only bring greater brightness dynamic range but also more abundant colors to a certain kind of technology. In other words, HDR creates a larger coordinate system than SDR to reproduce a larger color gamut and a higher brightness dynamic range.
Backlight Master Drive: Get close to RGB OLED effects on large LCD TVs
In theory, OLED technology can indeed show a greater degree of natural color. Is it not a matter of course that such a good technology should become a market trend? The actual situation is not so simple.
According to Zhou Zhenyu, Sony China home display product manager, most of the OLED TVs on the market use white light OLEDs, which are completely different from RGB OLED technologies. White light OLEDs cannot display the complete color space that OLEDs can theoretically achieve. . The majority of OLED TVs on the market use white light OLED technology because RGB OLED technology is very costly and does not do much. According to him, the cost of a master tape reference and monitor using RGB OLED technology is only close to 300,000 yuan.
Whether it is in the brightness range, white balance, color control or color gamut control, for the TV, RGB OLED performance is benchmarking. There is a big gap between ordinary LCD TVs, and even with the use of local light control technology, LCD TVs can achieve very good brightness level control in the processing of dark scenes, thereby maintaining the original color of the screen and excellent whiteness. balance. Unfortunately, the brightness is still not in the ideal range.
In order for LCD TVs to achieve near-RGB OLED effects, improvements in backlight system technology are necessary. This is also the original intention of Sony HDR Black Technology - Backlight Master Drive.
It is reported that this system uses a new optical design, can effectively control the overflow of the adjacent LED lights, while using ultra-high brightness LED backlight and high-density direct-type LED backlight source, equipped with advanced driving algorithms to Optimize energy consumption.
In the demonstration video playback comparison, Electro-Technology found that the color and brightness of the Sony Backlight Master Drive prototype are very similar to that of a master reference RGB OLED monitor. In contrast, another white LED TV set is from color. The reduction and picture performance are much less, especially in the performance of the highlight picture.
Since this demonstration is only a prototype of the technology, it is impossible for people to intuitively feel the difference in the picture through photos. Relevant person in charge revealed that Sony is actively assessing and evaluating, and strive to deploy this technology into the product as soon as possible. Zhou Zhenyu believes, "With Backlight Master Drive technology, you can get and close to OLED on the large-size LCD TV contrast and color display, so the LCD will still be the mainstream trend in the next few years."
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