What is 4-color HDR TV technology?

In 2016, 4K TVs that have experienced years of development have completely penetrated into the mainstream consumer market, followed by HDR technology as a new hot spot. Televisions launched by major TV brands are all focused on HDR technology. Judging from the test experience and measured data of many TV products, HDR technology is obviously improving the picture quality. Among them, we found that TV products based on 4-color HDR LCD panels performed particularly well. So, what is special about LG Display?

LG Display

LG Display leads 4-color HDR TV to the most mainstream market

LG Display is the world's largest maker of panel products and has an unpredictable display technology reserve. OLED display screens that are admired by the world and IPS hard screens that are loved by mainstream users all prove this. In the new year, in order to meet the demand of 4K HDR era, LG Display has launched a new 4-color HDR TV panel, which truly brings HDR technology to the homes of ordinary people, and also upgrades the popular IPS hard screen to New level.

IPS hard screen strong upgrade - 4-color HDR

Speaking of IPS hard screens, it can be described as a far-reaching broadcast. LG Display's “golden signboards” have not only caused many TV manufacturers to “submit”, but IPS hard screens have left us a good reputation for durability, reliability, and cost-effectiveness. The 4-color HDR LCD panel is based on the IPS hard screen. The HDR technology is directly embedded on the circuit board and the HDR characteristics are integrated into the blood source of the LCD panel. This is the most essential difference between the 4-color HDR LCD panel and other LCD panels.

Skyworth G7 Ultra HD TV adopts 4-color HDR technology

The 4-color HDR LCD panel not only has a more perfect HDR source, but also has features such as an ultra-wide viewing angle, high brightness, and low power consumption. More importantly, the 4-color HDR LCD panel continues the broad viewing angle of the IPS hard screen. The high degree of color reproduction, which is of great significance to the mainstream consumer groups, with the same cost to get the best HDR experience, next, we will tell everyone this is not a dream

4-color HDR LCD panel embedded HDR algorithm - almost complete rendering HDR source effect

In this part of the talk, HDR technology has improved the picture quality. However, it is the source of the film that restricts its further development. 3D is also gradually quitting the main stage due to the lack of film sources. The HDR algorithm independently developed by LG Display can convert common SDR film sources into HDR image effects, which greatly enhances the application of HDR. Not only can HDR images be improved when HDR sources are played.

For this reason, LG Display is the first to embed HDR technology in 4-color ultra-high-definition LCD panels. The optimized HDR algorithm can present the HDR film source to the audience with almost no reservations, making the image closer to the real scene and details in the shadows. Better performance. So, how to define the HDR effect of a TV product is really good or not. I believe that the measurement data certified by the authority is the most convincing.

The green curve is the photoelectric conversion factor when the HDR algorithm is turned on (in agreement with the blue SMPTE ST2084 curve)

The measurement results of the measurement instrument show that when a 4-color HDR LCD panel inputs an ordinary SDR signal, the OETF of the 4-color HDR LCD panel does not satisfy SMPTE ST2084 when the HDR algorithm is turned off, and the same signal source, 4-color HDR LCD panel, turns on the HDR algorithm. Its photoelectric conversion factor (OETF) satisfies SMPTE ST2084, and thus it is known that a 4-color HDR liquid crystal panel can convert an ordinary SDR signal into an image quality close to an HDR image effect.

HDR (High Dynamic Range) is literally translated as "high dynamic range", which can be understood as a higher picture latitude and wider brightness range, so that the image can present more detail in a high light ratio condition. The larger the dynamic range, the richer the details of the highlights and shadows recorded on the image at the same time. Therefore, the effectiveness of HDR depends on the size of HDR dynamic range. After testing, TV products based on four-color HDR technology compared to ordinary HDR TV products, HDR dynamic range increased by 44%.

Four-color HDR TV "chip-level decoding" brings the intuitive improvement

4-color HDR display is 44% faster than normal HDR

In summary, HDR technology is not simply attached to a TV. It requires a complete HDR capture, HDR chip decoding, and HDR screen display to present better quality content. Most HDR TVs on the market Not fully equipped with these conditions, and LG Display led four-color HDR TV "LCD panel embedded HDR algorithm" can be regarded as a qualified HDR TV products.

Comprehensive viewing angle - great advantages of 4-color HDR

The HDR algorithm technology of the 4-color HDR TV panel has excited us, and the ultra-wide viewing angle brought by the arrangement of the IPS hard-screen liquid crystal molecules is equally impressive.

Viewing angle

The IPS hard screen technology brings outstanding visual angle performance to 4-color HDR TVs. The front view and side view screens can be normally displayed, and the details in the shadows are also excellent. Also from the test results of the China Electronic Chamber of Commerce and the China Electronics Standardization Institute, the color perspective and gamma perspective of the 4-color HDR TV panel far exceeded the industry average, which was 1.77 times and 2.14 times the industry average, respectively, a significant difference.

As far as the actual data is concerned, when the color difference is 0.02 (more than 0.02 human eyes can perceive the color difference change), the maximum angle of 4-color HDR television viewing is as high as 111 degrees, while the integrated viewing angle of other LCD panel types is only 41 degrees.

In the test results, the color drift results were visually recognized when the IPS hard screen was larger than 55.5° at both sides, and even when the highest-end VA soft screen was at more than 32° from both sides, the color shift results could be recognized by the naked eye.

The gamma angle is a more professional test result. When the angle deviation is 30%, the larger the gamma deviation is, the more inconsistent the front view and the side view are. The popular point is that the gamma view test results are deviated to a certain extent. From the perspective of the user, the user's front view and the side view are inconsistent and affect the overall audiovisual experience. The test results show that the 4-color HDR gamma viewing angle can reach 170°, while the remaining panel types only have a gamma viewing angle of 56.8°.

The left VA panel screen has been yellowed / right IPS clearly restore the quality of the source

Whether it is chromatic aberration or gamma, the performance of 4-color HDR TVs is significantly stronger than that of other types of LCD panels, and the gap is beyond our imagination. Considering that the television is a product watched by the whole family, the excellent performance of the 4-color HDR TV is obviously a more ideal choice.

4-color HDR TV saves more than 35% energy

The important elements of display performance are brightness and energy consumption. We conducted a comparative test on a 4-color HDR LCD TV (4-color 4K mode) and an ordinary HDR TV (RGB mode) with the same conditions. The results showed that the 55-inch 4-color HDR TV energy index (1W corresponds to the brightness) is 3 to 4, while the ordinary HDR TV's energy index is 1 to 1.5, is a real college energy-saving panel.

"4-color HDR TV panel" adopts 4-color 4K mode, that is, adding white sub-pixels on the basis of RGB three colors, and the addition of white light greatly improves the light transmittance of this panel, which is easier to achieve than other types of LCD panels. Brightness, which ensures that a 4-color HDR TV can achieve sufficient brightness while reducing power consumption.

Taking into account the increasing size of televisions, the overall power consumption of TVs has risen sharply. The superior energy consumption performance of 4-color HDR TVs also deserves our attention.

4-color HDR TV - driving the entire panel industry upgrade

In order to make the reader understand the characteristics of the 4-color HDR TV more easily, I will explain it to you in a relatively easy-to-understand way. In general, the "HDR algorithm" of 4-color HDR TV can not only present the HDR effect perfectly, but also enable the SDR content to "hide HDR effect" to obtain a better picture quality experience; the chromaticity perspective and the gamma perspective are even more successful. The advantage of multiple times is more suitable for the whole family to watch TV. In today's energy saving and environmental protection, the characteristics of 4-color HDR with high brightness and low energy consumption also make us happy.

LG Display Leads HDR Technology to Mainstream Public

The author believes that LG Display, as the world's largest manufacturer of LCD panels, was obliged to lead the development of the entire panel industry. Four-color HDR TVs allow civilians to truly enjoy the outstanding effects of HDR technology and make them more outstanding. The energy consumption ratio is a great contribution to society. Taking into account LG Display's influence in the panel industry, we believe that other panel makers will follow suit and eventually drive the entire panel industry to upgrade.

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