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

    When it comes to the next development trend of smartphones, it is easy to 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 impossible. But when it comes to smartphone displays, we inevitably encounter one of the biggest constraints—power consumption. Most of today's smartphones are facing the fate of one charge a day or even more than one day, and the root of this problem lies in the most power-hungry screen in a smartphone. The screen should be larger, the resolution should be improved, and the power consumption should be low at the same time. The answer to this seemingly impossible combination of conditions may be Sharp's housekeeping skill, the IGZO display.

    The IGZO display can be regarded as Sharp's housekeeping skills. The smartphones recently launched by Sharp in the Japanese market are also equipped with IGZO displays without exception. It is worth noting that the biggest highlight of the Sharp mobile phone equipped with this screen is the "super long standby", of course, this is also the advantage of the IGZO display. The Sharp AQUOSPHONEZETA, which supports the longest standby in the history of Japanese operator DoCoMo, officially benefits from the low power consumption of the IGZO display.

    Another interesting thing is a piece of news about the Tokyo Olympics. It is reported that the 2020 Tokyo Olympics will give birth to the debut of 8K TVs, and the Japanese government has also expected to conduct experimental broadcasts of 4K and 8K signals in 2014. In other words, 4K and 8K signals will be popular in the Tokyo Olympics seven years later, which will affect not only TVs, but also mobile phones. If 4K is really popular, then the mobile TV function in Japanese mobile phones can also receive this signal, and the emergence of 4K displays is imperative at this time. Sharp's IGZO display also has a good application in TV products, so there is no problem with 4K support. Combined with the low power consumption advantages we mentioned earlier, it seems that IGZO display has become the most reasonable in the mainstream trend of mobile phone development. one of the programs.

    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 of IGZO are actually the acronyms from four elements, namely Indium (indium), Gallium (gallium), Zinc (zinc) and Oxide (oxide), which means that IGZO can actually be used as indium gallium zinc It has the advantages of high mobility, good uniformity and strong permeability.

    IGZO crystallizes indium, gallium, zinc, and oxygen, which were extremely difficult in the past, and realizes a new crystal structure of atomic arrangement. Based on this unique and meticulous arrangement, the IGZO display has strong stability and a more refined display effect, which is suitable for more fields.

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

    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, the previous display screen will continue to refresh the data even when displaying a still picture, which naturally results in the continuous display of the screen. operation, making the screen a power-hungry smartphone. The IGZO display screen adopts the mode of switching the current between ON and OFF when displaying the still picture, that is to say, the IGZO display screen is not constantly refreshed, but intermittently turns on and off the current. When it is not refreshed, we start from The picture seen on the screen can actually be understood as the "cached content" of the previously displayed picture. In this way, the power consumption of the IGZO display can be greatly reduced to one-fifth or even one-tenth, which is why Sharp AQUOSPHONEZETA advertises that it can last for 3 days without stress under normal use after it is equipped with a power-saving application.

    The last feature of the IGZO display is its ultra-high sensitivity. Based on the dormant driving method in which the current ON and OFF are constantly switched as we mentioned earlier, the occurrence of interference that affects the touch screen detection of the display screen occurs between this switching. The time is also very short, even the subtle touch screen operation signals can be sensitively recognized, so that even a very thin stylus can write and draw on the IGZO display screen, and the drawn lines can also be There are more obvious thickness changes, just like writing on paper, bringing users a natural operating feel.

    As for the future application of IGZO display, it is the most suitable direction for IGZO display to be used in high-precision display devices, smartphones and other wearable smart devices. With the popularity of 4K and even 8K signals in Japan in the next seven years, 4K resolution smartphone displays will also gain an opportunity to spread from Japan to the world. With high resolution and low power consumption, IGZO will no longer be exclusively enjoyed by Sharp in the future, and will be more likely to be applied to smart phone products launched by other mobile phone manufacturers at home and abroad. What an Olympic Games may bring is a change in the field of smartphones and a collision of technologies. For users, such a collision is undoubtedly welcome, and it is necessary for us to prepare for more smartphones equipped with IGZO screens in the future.