Do you know how long it takes for a technology to go from invention to business? The first mouse prototype was born in 1963. After 21 years, it was used by Apple Computer. After 42 years, Windows 95 was launched. The mouse-type calculation was formally announced. In 1984, the first multi-touch display was born, and 23 years later, the iPhone was launched. It only became popular; in 2005, there was a self-driving car. It is expected that commercial self-driving cars will emerge around 2020, and it will be widely accepted around 2030.
Professor Deng Qingyun discovered OLED in the laboratory in 1979. It has been 36 years since today. Has OLED matured? A few years ago, many media outlets always looked at OLEDs with all sorts of perspectives. They thought that the display technology had too low a yield and it was difficult to produce. The price was still quite high and it took a long time to hone. However, time is not a standard for measuring technology maturity. Practice is the sole criterion for testing technology. It is obviously unfair to look at today's OLEDs with an old eye. At present, more and more manufacturers have joined the OLED camp. In September this year, the China OLED Display Industry Alliance headed by Skyworth was established. In the past, the technical barriers to OLED diffusion have been eliminated. In order to make the market more rapid and healthy development, LG DISPLAY is also preparing to open all patents for OLED display panels until 2020.
Is it true that there are flaws such as screen burn and high power consumption in OLED? The PConline evaluation room will conduct a special evaluation on the Skyworth S9300, a production model that uses OLED panels. In order to test the performance of OLEDs more rigorously, the evaluation room will adopt a higher-strength test method (which greatly exceeds the limit of daily use), giving netizens the most realistic OLED display.
Screen verification
There are rumors that the Skyworth OLED TV specification is marked with: Users want to avoid displaying fixed images on TV screens for "1 hour or longer." And inferred to play static pictures for a long time, it will lead to afterimages and even burn. We know that the OLED panel is made up of a number of self-illuminating "bulbs." The so-called burn-in is that these "bulbs" fail to function for a certain length of time when they work continuously. Some malfunctions occur. For example, some icons will be permanent. Remains on the screen. We use experiments to see if this situation will happen.
The most fixed image on the TV screen is the TV station sign. We make a picture of the TV station logo and use Skyworth OLED TV to display it for 6 hours in succession. Then we use white, red, green and blue colors to test Skyworth 4 Whether or not the pixels of each color in the position of the station logo on the 4K OLED panel is still working properly. We used video to record the entire test process. Due to the relatively long time, the video was played in a fast-forward manner.
The experiment began at 3:43 pm. The station logo for testing included CCTV Channel, Hunan TV Station, Zhejiang TV Station, Jiangsu TV Station, Tianjin TV Station, Shandong TV Station, Hainan TV Station, and CCTV Sports Events Channel. The color of these logos covers black, red, blue, and green. Locations are located in the upper left, middle, and lower right corners. Above the screen is a clock for timing.
From the video, we can see that when the screen of the station logo is displayed until 10 o'clock in the evening (more than 6 hours), we have switched the screen. Pure white screen pure red screen Pure green screen Pure blue screen, each color screen, the original position of the station logo is intact, with the screen color changes, there is no residual image and burn screen phenomenon.
The verification result OLED plays a static picture for a long time without ghosting or burning.
Power verification
There are also rumors that the power consumption of OLED TVs is very large, comparable to plasma TVs that are both self-illuminating. When I heard this remark, the author's heart was actually rejected. In an article introducing the structure of OLEDs, we mentioned that OLEDs eliminate the need for backlight groups. The structure is simpler and more efficient. It should be more power-efficient. How can it consume more power? There are also people who say that OLED TV switching machines consume power, and that continuous switching opportunities seriously affect the life of TVs. Since there is doubting voice, then we will verify these doubts and see what the truth is.
Continuous Switching Machine: How does the power consumption of continuous switching OLED TVs change?
We use a 55-inch 4K LCD TV with the Skyworth 55S9300 for comparison. Continuously switch off and on for 30 times and record their power consumption changes. And calculate the average value of the maximum and minimum power consumption of the switch.
From the table, we can see that the power consumption of the switching power supply of Skyworth OLED TV remains very stable, and the highest power consumption is about 100W higher than that of the same resolution LCD TV. Of course, this is also related to the brightness of the screen displayed when the camera is turned on. The LCD TV boot screen is basically black, and the Skyworth OLED boot screen is a Skyworth blue logo. The 100W power consumption gap is also reasonable.
Next we conducted a power contrast monitoring of 4K video playback. Two video clips, Victorian Night Scene and Spiderman Trailer, were used. The same sort of table is as follows.
Due to the self-luminous nature of OLEDs, the power consumption will be lower when the television is playing a darker picture, and theoretically the screen will not consume any power when it is dark. Especially in the short film of Victoria Night Scene, the dynamic contrast picture is particularly large. From the video, we can also see the power meter constantly jumping. Skyworth OLEDs achieved the highest power consumption in the first few seconds of start-up and were higher than LCD TVs, but then quickly dropped to the average level. The self-luminous nature of the OLED seems to have its own energy-saving features, the average power consumption while watching the video is lower than the LCD TV.
Finally, we observed the power consumption performance between Skyworth OLED TVs and LCD TVs by showing five different colors of black, white, blue, green, and red.
Through a large amount of data comparison, we found that the power consumption performance of OLEDs is not much higher than that of LCD TVs. On the contrary, it will be more power-efficient when it is black. The performance of other colors is also quite stable. It can also be seen from the average value that the 55-inch 4K OLED and LCD TV have a gap between 10W and 80W, and this kind of power consumption gap is very small.
The verification result shows that the power consumption performance of OLED TVs and LCD TVs is basically at the same level.
Long boot verification
The long boot verification is a comprehensive consideration test for the TV. To further understand the specific performance of the OLED TV, we will perform 24 hours of continuous normal playback of the TV picture. In this process, we record different time periods by using the point and click method. OLED TV screen body temperature and overall power consumption performance.
We have continuously played the most popular TV dramas in 32 episodes of the ages, for a total of more than 24 hours. The continuous use of television for such a long time should be the ultimate level of ordinary families, and it has strong reference value. Due to the long test time, our video will be played in a fast-forward manner.
In order to better express the relationship between time, temperature, and power consumption, we present the test results in a tabular format.
The table data analysis shows that the playback time and the screen temperature are positively related. After about 20 minutes, the maximum temperature is maintained at 40 degrees and up and down until the end. The highest temperature peak is at 44.5 degrees. There is no linear relationship between power consumption and temperature, and there is no linear relationship with time. From previous experiments, it can be seen that there is only a relationship with the playback picture.
The average maximum temperature of OLEDs for 24 hours is 39.22 degrees, and the average power consumption is 170W.
Verification Results The OLED TV plays a normal picture for 24 hours in a row, and the temperature and power consumption are very stable and at an advanced level.
Theoretical basis
Why does OLED have better temperature and power performance than LCD TVs? In fact, it is based on evidence.
The OLED organic material is composed of a thin and transparent indium tin oxide (ITO) with a semiconducting property, which is connected to the positive electrode of the electric power, and another metal cathode, which is formed into a sandwich structure. The entire structural layer includes a hole transport layer (HTL), a light emitting layer (EL) and an electron transport layer (ETL). When the power is supplied to an appropriate voltage, positive hole and cathode charges are combined in the light emitting layer to produce light, and red, green, and blue RGB primary colors are generated according to different recipes to form a basic color. If you do not understand it, you can think of it as our common LED lamp beads. The principles between them are very similar.
Structurally, OLED display technology is much simpler than liquid crystal display technology. The OLED display technology does not require backlight or liquid crystal, and the organic layer can emit light when energized. Each pixel is independently driven by a corresponding circuit, and the thickness of the organic thin film layer can be very small, only about 1,000 to 1,500 A (0.10). ~ 0.15 um).
With its simple structure and efficient light emission, OLED TVs not only have better color effects, but also have better energy efficiency.
to sum up
Through the multidimensional testing of Skyworth's OLED organic TV burn-in screen, power consumption, and temperature, many deficiencies in OLED OLED display technology have been overcome. There are indeed some difficulties in the early stages of OLED development, but today's OLEDs are quite mature. LG Group's LG Display's 2K OLED panel yield has nearly 90%, 4KOLED panel production began in June this year, plans to achieve 90% yield next year. In China, SKYWORTH advocated OLED, and as the first of the OLED industry alliances in China, it began to accumulate after two years of preparation.
Innovation will always occur in our conflicts and entanglements with new technologies. Now that OLED has opened his arms, we have reason to believe that this new technology will once again trigger a storm in the field of consumer electronics.
Professor Deng Qingyun discovered OLED in the laboratory in 1979. It has been 36 years since today. Has OLED matured? A few years ago, many media outlets always looked at OLEDs with all sorts of perspectives. They thought that the display technology had too low a yield and it was difficult to produce. The price was still quite high and it took a long time to hone. However, time is not a standard for measuring technology maturity. Practice is the sole criterion for testing technology. It is obviously unfair to look at today's OLEDs with an old eye. At present, more and more manufacturers have joined the OLED camp. In September this year, the China OLED Display Industry Alliance headed by Skyworth was established. In the past, the technical barriers to OLED diffusion have been eliminated. In order to make the market more rapid and healthy development, LG DISPLAY is also preparing to open all patents for OLED display panels until 2020.
Is it true that there are flaws such as screen burn and high power consumption in OLED? The PConline evaluation room will conduct a special evaluation on the Skyworth S9300, a production model that uses OLED panels. In order to test the performance of OLEDs more rigorously, the evaluation room will adopt a higher-strength test method (which greatly exceeds the limit of daily use), giving netizens the most realistic OLED display.
Screen verification
There are rumors that the Skyworth OLED TV specification is marked with: Users want to avoid displaying fixed images on TV screens for "1 hour or longer." And inferred to play static pictures for a long time, it will lead to afterimages and even burn. We know that the OLED panel is made up of a number of self-illuminating "bulbs." The so-called burn-in is that these "bulbs" fail to function for a certain length of time when they work continuously. Some malfunctions occur. For example, some icons will be permanent. Remains on the screen. We use experiments to see if this situation will happen.
The most fixed image on the TV screen is the TV station sign. We make a picture of the TV station logo and use Skyworth OLED TV to display it for 6 hours in succession. Then we use white, red, green and blue colors to test Skyworth 4 Whether or not the pixels of each color in the position of the station logo on the 4K OLED panel is still working properly. We used video to record the entire test process. Due to the relatively long time, the video was played in a fast-forward manner.
The experiment began at 3:43 pm. The station logo for testing included CCTV Channel, Hunan TV Station, Zhejiang TV Station, Jiangsu TV Station, Tianjin TV Station, Shandong TV Station, Hainan TV Station, and CCTV Sports Events Channel. The color of these logos covers black, red, blue, and green. Locations are located in the upper left, middle, and lower right corners. Above the screen is a clock for timing.
From the video, we can see that when the screen of the station logo is displayed until 10 o'clock in the evening (more than 6 hours), we have switched the screen. Pure white screen pure red screen Pure green screen Pure blue screen, each color screen, the original position of the station logo is intact, with the screen color changes, there is no residual image and burn screen phenomenon.
The verification result OLED plays a static picture for a long time without ghosting or burning.
Power verification
There are also rumors that the power consumption of OLED TVs is very large, comparable to plasma TVs that are both self-illuminating. When I heard this remark, the author's heart was actually rejected. In an article introducing the structure of OLEDs, we mentioned that OLEDs eliminate the need for backlight groups. The structure is simpler and more efficient. It should be more power-efficient. How can it consume more power? There are also people who say that OLED TV switching machines consume power, and that continuous switching opportunities seriously affect the life of TVs. Since there is doubting voice, then we will verify these doubts and see what the truth is.
Continuous Switching Machine: How does the power consumption of continuous switching OLED TVs change?
We use a 55-inch 4K LCD TV with the Skyworth 55S9300 for comparison. Continuously switch off and on for 30 times and record their power consumption changes. And calculate the average value of the maximum and minimum power consumption of the switch.
From the table, we can see that the power consumption of the switching power supply of Skyworth OLED TV remains very stable, and the highest power consumption is about 100W higher than that of the same resolution LCD TV. Of course, this is also related to the brightness of the screen displayed when the camera is turned on. The LCD TV boot screen is basically black, and the Skyworth OLED boot screen is a Skyworth blue logo. The 100W power consumption gap is also reasonable.
Next we conducted a power contrast monitoring of 4K video playback. Two video clips, Victorian Night Scene and Spiderman Trailer, were used. The same sort of table is as follows.
Due to the self-luminous nature of OLEDs, the power consumption will be lower when the television is playing a darker picture, and theoretically the screen will not consume any power when it is dark. Especially in the short film of Victoria Night Scene, the dynamic contrast picture is particularly large. From the video, we can also see the power meter constantly jumping. Skyworth OLEDs achieved the highest power consumption in the first few seconds of start-up and were higher than LCD TVs, but then quickly dropped to the average level. The self-luminous nature of the OLED seems to have its own energy-saving features, the average power consumption while watching the video is lower than the LCD TV.
Finally, we observed the power consumption performance between Skyworth OLED TVs and LCD TVs by showing five different colors of black, white, blue, green, and red.
Through a large amount of data comparison, we found that the power consumption performance of OLEDs is not much higher than that of LCD TVs. On the contrary, it will be more power-efficient when it is black. The performance of other colors is also quite stable. It can also be seen from the average value that the 55-inch 4K OLED and LCD TV have a gap between 10W and 80W, and this kind of power consumption gap is very small.
The verification result shows that the power consumption performance of OLED TVs and LCD TVs is basically at the same level.
Long boot verification
The long boot verification is a comprehensive consideration test for the TV. To further understand the specific performance of the OLED TV, we will perform 24 hours of continuous normal playback of the TV picture. In this process, we record different time periods by using the point and click method. OLED TV screen body temperature and overall power consumption performance.
We have continuously played the most popular TV dramas in 32 episodes of the ages, for a total of more than 24 hours. The continuous use of television for such a long time should be the ultimate level of ordinary families, and it has strong reference value. Due to the long test time, our video will be played in a fast-forward manner.
In order to better express the relationship between time, temperature, and power consumption, we present the test results in a tabular format.
The table data analysis shows that the playback time and the screen temperature are positively related. After about 20 minutes, the maximum temperature is maintained at 40 degrees and up and down until the end. The highest temperature peak is at 44.5 degrees. There is no linear relationship between power consumption and temperature, and there is no linear relationship with time. From previous experiments, it can be seen that there is only a relationship with the playback picture.
The average maximum temperature of OLEDs for 24 hours is 39.22 degrees, and the average power consumption is 170W.
Verification Results The OLED TV plays a normal picture for 24 hours in a row, and the temperature and power consumption are very stable and at an advanced level.
Theoretical basis
Why does OLED have better temperature and power performance than LCD TVs? In fact, it is based on evidence.
OLED organic material basic structure
The OLED organic material is composed of a thin and transparent indium tin oxide (ITO) with a semiconducting property, which is connected to the positive electrode of the electric power, and another metal cathode, which is formed into a sandwich structure. The entire structural layer includes a hole transport layer (HTL), a light emitting layer (EL) and an electron transport layer (ETL). When the power is supplied to an appropriate voltage, positive hole and cathode charges are combined in the light emitting layer to produce light, and red, green, and blue RGB primary colors are generated according to different recipes to form a basic color. If you do not understand it, you can think of it as our common LED lamp beads. The principles between them are very similar.
The basic structure of OLED display technology
Structurally, OLED display technology is much simpler than liquid crystal display technology. The OLED display technology does not require backlight or liquid crystal, and the organic layer can emit light when energized. Each pixel is independently driven by a corresponding circuit, and the thickness of the organic thin film layer can be very small, only about 1,000 to 1,500 A (0.10). ~ 0.15 um).
With its simple structure and efficient light emission, OLED TVs not only have better color effects, but also have better energy efficiency.
to sum up
Through the multidimensional testing of Skyworth's OLED organic TV burn-in screen, power consumption, and temperature, many deficiencies in OLED OLED display technology have been overcome. There are indeed some difficulties in the early stages of OLED development, but today's OLEDs are quite mature. LG Group's LG Display's 2K OLED panel yield has nearly 90%, 4KOLED panel production began in June this year, plans to achieve 90% yield next year. In China, SKYWORTH advocated OLED, and as the first of the OLED industry alliances in China, it began to accumulate after two years of preparation.
Innovation will always occur in our conflicts and entanglements with new technologies. Now that OLED has opened his arms, we have reason to believe that this new technology will once again trigger a storm in the field of consumer electronics.