What is the Samsung E4 screen and why are flagships such as Redmi K40 rushing to use it?

As the "front" of a mobile phone, how the look and feel of the mobile phone's screen will directly affect the user's first use experience is of vital importance to a mobile phone. At the Redmi K40 series conference held before, a "new" material was mentioned many times, that is, the Samsung E4 OLED light-emitting material.

said that this material is new because compared to the previous generation E3 material, this material belongs to Samsung's latest OLED light-emitting material, but this material has been applied on the previous Xiaomi 11. So what exactly is this material? Why does Xiaomi use screens made of this material on its two flagships?

01 How exactly is the E4 luminescent material on Xiaomi 11/Redmi K40

Before talking about the Samsung E4 screen used in Xiaomi 11/Redmi K40, let’s first understand the composition and principle of the OLED screen: OLED itself consists of a cathode and an emission layer , Conductive layer, anode and base, from the production process, it is made of two layers of film and plastic/glass substrate. The principle is that light-emitting materials of organic semiconductors form excitons under the action of an electric field, etc., and eventually cause light-emitting phenomena. It can be seen that light-emitting materials play an important role in OLED screens.

And the Samsung E4 used in the Xiaomi 11/Redmi K40 series is the latest luminous material developed by the latter, and its display effect is naturally obvious to all: as the first Samsung E4 luminous material mobile phone, the screen of Xiaomi Mi 11 is also obtained The highest A+ level given by DisplayMate, an authoritative screen evaluation agency. With the support of E4 materials, the Mi 11 screen has also refreshed 13 records including the highest screen resolution, highest OLED peak brightness, and lowest screen reflectivity.

Judging from the promotional materials given by Xiaomi, Samsung E4 luminescent materials have been greatly optimized in terms of peak brightness and power consumption compared to the past E3 materials: the former has a peak brightness of 1500 nits and strong light It can also reach 900 nits, the contrast ratio is as high as 5000000:1, and the power consumption is reduced by 15%. As for other aspects, Xiaomi did not mention too much. Xiaogang guessed that Samsung E4 material may be a targeted upgrade version of E3 material.

02E4 luminescent materials are very new and very good, but there is also an M series

Although this E4 material does earn a wave of exposure for Xiaomi, as the saying goes, the fertilizer does not flow into the field, and the E series luminescent materials are only It is just one of the product lines of Samsung Display, and it also has a product line with higher positioning.

The current product line of Samsung Display can be roughly divided into three categories:

· M series: The most high-end positioning, for Samsung flagship machine use.

·LTPO: Apple’s exclusive customization, low power consumption.

·E series: for export.

The AMOLED screen used in Samsung’s newly released Galaxy S21 series this year is made of high-end M series substrates: Galaxy S21/S21+ uses M10 substrates, and the "super cup" Galaxy S21 Ultra uses M11 substrates. The latter has lower power consumption than the former. From the perspective of product positioning, the Samsung E4 material used by Xiaomi is roughly equivalent to the export version of the M10. From the existing data, the power consumption of the E4 material of Xiaomi Mi 11 is 15% lower than the previous generation, while the Samsung M11 is 16% lower than the previous generation. However, the two use different series of materials, and their comparison standards are also different. .

Samsung Galaxy S21 Ultra

The data of Samsung Galaxy S21 Ultra has not yet appeared on DisplayMate's official website, but we can compare the screen data of Note 20 Ultra with the screen data of K40 Pro/Xiaomi 11:

Redmi K40 Pro spectrum source: DisplayMate official website

Samsung Galaxy Note 20 Ultra spectrum source: DisplayMate official website

img strong 34strong

img strong display p11p official website

Taken together,The E4 material of Xiaomi 11/K40 Pro is not too far from Samsung's own M10 material. It can be said that the former is equivalent to the export version of the latter. It is not clear how it compares with Samsung's latest M11 luminescent material. However, the actual performance of the first two models is slightly different even if the same material is used due to product positioning and other factors.

In addition, from a market point of view, the Redmi K40 series has launched the "most expensive straight screen". From a certain perspective, it also echoes Xiaomi 11’s first Samsung E4 luminescent material. After all, the latter adopts a curved design. The E4 direct screen can cover the existing two mainstream mobile phone forms. And from the previous article, Samsung E4 luminescent material is basically the best material that other mobile phone manufacturers except Apple and Sony can obtain from Samsung in 2021. This undoubtedly also brings certain advantages to Xiaomi, which has always liked to "start": It not only covers the two major user groups / Quping, but also brings publicity to the new machine. Moreover, Xiaomi Mi 11 is the first to be adopted, and the cost and production/technical difficulty will be reduced accordingly in the later period. Therefore, this Redmi K40 series The use of E4 luminescent materials for direct screens is also reasonable.

03 Xiaogang has something to say

Xiaogang believes that Samsung E4 luminescent material can be said to be the latest and best Samsung screen luminescent material that domestic mobile phone manufacturers can purchase. It is foreseeable that a large number of mobile phones using Samsung E4 luminescent materials will be released in 2021. However, due to the different adjustments of the screen/display by the major manufacturers, the actual display effect may also be different.

In recent years, domestic mobile phone manufacturers have also begun to support domestic screen manufacturers. After all, no one will give their best screens to others. Therefore, Huawei has gradually begun to support BOE and other screen manufacturers, while Xiaomi chose to cooperate with TCL in order to lay out the mobile phone screen market and promote the development and production of domestic advanced screens. Fortunately, after years of hard work, domestic screens have caught up but there are still gaps. Hope that in the future, domestic screen manufacturers can further shorten the gap and master more core technologies.

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