The difference between IGZO display high-resolution and low-power consumption technology and AMOLED

    When talking about the next development trend of smartphones, we can easily think of the increase in screen resolution. At the end of last year, we were still discussing whether 1080p resolution was necessary. Now it seems that even if the screen resolution of mobile phones reaches 4K level one day, it does not seem to be impossible. But when it comes to smartphone displays, we will inevitably encounter one of the biggest constraints - power consumption. Most of today's smartphones are faced with the fate of charging once or even multiple times a day, and the root of this problem lies in the most power-consuming screen in smartphones. The screen needs to be larger, the resolution needs to be improved, and power consumption must be low at the same time. The answer to this seemingly impossible combination of conditions may be Sharp's specialty - IGZO display.

    IGZO displays can be seen as Sharp’s specialty. Recently, Sharp’s smartphones launched in the Japanese market are all equipped with IGZO displays without exception. It is worth noting that the biggest highlight of Sharp mobile phones equipped with this screen is the "ultra-long standby". Of course, this is also the advantage of the IGZO display. Sharp AQUOSPHONEZETA, which has the longest standby time in the history of Japanese operator DoCoMo, has officially benefited from the low power consumption of the IGZO display.

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So what exactly is an IGZO display and how does an IGZO display achieve low power consumption? Let’s talk about this topic today.

   First of all, let’s start with the name of IGZO. The four letters IGZO actually come from the abbreviations of four elements, namely Indium (indium), Gallium (gallium), Zinc (zinc) and Oxide (oxide), which means that IGZO can actually be used as indium gallium zinc To understand it as oxide, it has the advantages of high mobility, good uniformity and strong permeability.

   IGZO crystallizes indium, gallium, zinc and oxygen, which have been extremely difficult in the past, and achieves a new crystal structure of atomic arrangement. Based on this unique and detailed arrangement, the IGZO display is extremely stable, the display effect is more refined, and it is suitable for more fields.

    In addition to the new arrangement, another major feature of IGZO technology is its extremely high electron mobility. Electron mobility shows the flow of electrons in a solid material. Compared with the widely used amorphous silicon panels, the electron mobility of IGZO displays can reach 20-50 times. The higher the mobility, the smaller the resistivity, and the smaller the power consumption when passing the same current, which plays a great role in the low power consumption performance of the IGZO display. At the same time, based on extremely high electron mobility, IGZO displays also have more refined display effects than previous displays.

IGZO intermittently turns on current when displaying still images, saving more power.

   Earlier we talked about the low power consumption advantage of IGZO display, now let’s talk about how IGZO achieves low power consumption. Sharp regards low power consumption as the strongest advantage of IGZO. This is because under normal circumstances, previous displays will continue to refresh data even when displaying still images, which naturally results in uninterrupted screen operation. operation, making the screen a major power consumer of smartphones. The IGZO display uses a mode in which the current switches between ON and OFF when displaying still images. That is to say, the IGZO display does not refresh continuously, but turns on and off the current intermittently. When it is not refreshed, we start from The picture seen on the screen can actually be understood as the "cache content" of the picture previously displayed. In this way, the power consumption of the IGZO display can be significantly reduced to one-fifth or even one-tenth, which is why, after being equipped with power-saving applications, Sharp AQUOSPHONEZETA claims to be able to last for 3 days without stress under normal use.

    The last characteristic of the IGZO display is reflected in its ultra-high sensitivity. Based on the rest driving method where the current ON and OFF are continuously switched as mentioned earlier, interference that affects the touch screen detection of the display occurs during this switching. The time is also very short, and even subtle touch screen operation signals can be sensitively recognized. In this way, even a very thin stylus can write and draw on the IGZO display, and the drawn lines can be There are more obvious changes in thickness, just like writing on paper, giving users a natural operating feel.

   As for the future application of IGZO displays, application in high-definition display devices, smartphones and other wearable smart devices is the most suitable direction for IGZO displays. With the popularity of 4K and even 8K signals in Japan in the next seven years, 4K resolution smartphone displays will also have an opportunity to spread from Japan to the world. With high resolution and low power consumption, IGZO will no longer be exclusive to Sharp in the future, and is more likely to be applied to smartphone products launched by other domestic and foreign mobile phone manufacturers. What the Olympic Games may bring about is a change in the field of smartphones and a collision of technologies. For users, such a collision is undoubtedly welcome, and we also need to be prepared to welcome more smartphones equipped with IGZO screens.