What are the advantages of 4-color HDR TV?

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 focusing 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 is the world's largest manufacturer of panel products and has an unfathomable display technology reserve. OLEDs and IPS hard screens that are admired by mainstream users are all proof of this. In the new year, in order to meet the demand for 4K HDR era, LG Display 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” not only make many TV manufacturers “loving,” but IPS hard screens give us a good reputation for durability, reliability, and reliability. The 4-color HDR LCD panel is based on the IPS hard screen. The HDR technology is directly embedded in the panel 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 can analyze the HDR source more perfectly, 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 IPS hard screen with ultra-wide viewing angle and color. The high degree of reduction, which is of great significance to the mainstream consumer groups, uses the same cost to obtain the best HDR experience. Next, we will tell everyone that this is not a dream.

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

In this part of the talk, HDR technology has improved the quality of the picture. However, it is the film source problem 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 enhanced 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 HDR algorithm can optimize the rendering of HDR film sources to the audience with almost no reservations, making the images closer to real scenes 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 gamma curve under the HDR algorithm closes the reference value gamma 2.2 of the common SDR signal, and the same signal source, 4-color HDR LCD panel is turned on. When the HDR algorithm satisfies the gamma curve SMPTE ST2084 of the HDR image, it is learned that the 4-color HDR liquid crystal panel can convert the normal SDR signal into an image quality close to the HDR image effect.

HDR (High Dynamic Range) is literally translated as "high dynamic range", which can be understood as higher picture latitude and wider brightness range, so that the image can present more detail in high light ratio conditions. 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, compared to the same brand of ordinary HDR TV products, the HDR dynamic range of the 4-color HDR technology TV is high and presents a more vivid and excellent HDR video quality.

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. LG Display's 4-color HDR technology can be said to be the best LCD TV technology to present HDR technology with the "LCD panel embedded HDR algorithm."

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. The difference was significant.

In terms of actual data, 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 110°, while the integrated viewing angle of other LCD panel types is only 50.5°.

In the test results, the color drift results were visually recognized when the IPS hard screen was greater than 55° at both viewing angles, and the color shift results could be visually recognized even when the highest-end VA soft screen was at more than 32° from both sides.

The gamma perspective is a more professional test conclusion. The images we watch have a variety of grayscale values ​​and can be accurately represented on the side. These can be called good TVs. If we can't perform accurately on the side, there will be low gray noise. The test results show that the 4-color HDR gamma viewing angle can reach 170°, while the remaining panel type gamma viewing angle is only 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 better 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 4-color HDR TV adopting the IPS hard screen technology with the advantages of wide viewing angle 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 tested the 4-color HDR LCD TV (4 color 4K mode) and the ordinary HDR TV (RGB mode) with the same conditions. The results showed that the 4 color 4K mode 4 color HDR TV has obvious advantages.

Four-color 4K mode adds white sub-pixels on the basis of RGB three primary colors, which greatly improves the light transmittance, and its brightness is 50% higher than that of ordinary RGB mode (with the same power consumption), and the energy consumption is about 35% lower (equivalent Brightness).

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 ordinary SDR video is displayed close to the HDR video quality, and the HDR video presents a more vivid and excellent image quality. The 4-color HDR is the best TV technology in today's HDR LCD technology; The addition of IPS hard screens and wide viewing angle panels with excellent gamma perspectives makes them more suitable for the whole family to watch high quality videos. Today, energy-saving and environmentally friendly, 4-color HDR believes it can meet the needs of consumers.

The author believes that LG Display, as the world's largest manufacturer of LCD panels, had an obligation to health guide the development of the entire panel industry. The 4-color HDR TV allows ordinary people to enjoy the outstanding effects of HDR technology in the true sense. 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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