Huawei has not recently released a tablet for electronic ink screens.
It seems that there are quite a lot of people discussing, the machine brother looked at it, and they are talking about this screen.
Everyone is actually quite interested in this "non-mainstream" display technology.
The machine brother is also curious, isn't the screen already doing well now?
To have brightness and brightness, to have color, to have high brush and high brush.
But, in addition to these hard parameters, there are some hidden properties.
For example, the display effect under strong light.
Mainstream screens, whether lcd or OLED, the common way is to increase the brightness.
Some manufacturers have also played the concept of "sunshine screen", which is also promoted.
However, this time, the machine brother will first say but as soon as the game starts.
The brother found that more than a decade ago, it seems that some mobile phones have solved this problem.
Logically, the previous screen is certainly not as good as the current one, which should not be ah.
Because those phones use a technology, called semi-trans LCD.
What does it mean?
Simply put, the screen can be both transparent and reflective.
It doesn't matter if you don't understand it, the brother broke it up for everyone.
First of all, the liquid crystal layer responsible for display in the LCD is translucent.
If you want to display the picture normally, you also need light.
Our common LCD relies on backlighting.
If there is no backlight, it is similar to Nokia's classic information screen display.
But in fact, the light from the outside world can also illuminate the liquid crystal layer.
The so-called semi-trans is to add a layer of semi-transparent film in front of the screen backlight.
The principle is actually a lot like some smart mirror with a screen.
When the screen inside is not bright, it can reflect light, which is a normal mirror.
If the screen inside is lit, it can also be displayed through the glass.
It's just that the reflective layer of the semi-translucent and semi-reflective screen is hidden under the liquid crystal layer and cannot be used as a mirror.
But if you go outdoors, it reflects sunlight to make the screen look brighter.
This may be "attacking poison with poison".
The sunlight is dazzling, and the screen can still be seen clearly, which is the real sunshine screen.
Some friends may have to ask at this time, this technology is so good, why haven't you heard of it?
The machine brother thinks that it may be that the mobile phone manufacturers at that time were too low-key.
In other words, now, it is not necessary to spend a few pages of PPT to talk about it.
For example, the Nokia N96 uses this technology.
It looks like this in the sunshine on a sunny day.
emm, it seems that the effect is not particularly good, this color is pasted, ancestral plastic outer screen back pot!
But look at the Nokia 5800 without a half-transparent, half-reflective screen.
Ah this... This is no longer a question of whether it is good or not, this is a gap that can be seen clearly.
In addition to Nokia, BlackBerry also has some early models that use semi-transparent and semi-reverse screens.
Many BlackBerry fans expressed nostalgia, and later mobile phones rarely had such a stunning outdoor display effect.
However, Xiaomi's first generation of mobile phones actually promoted this technology, I don't know if you remember.
At the time, the saying was that a 4.0-inch Sharp half-transparent and half-reflective LCD screen was used.
However, the actual effect did not leave too deep an impression.
After that, a generation of classic Xiaomi Mi 2 will be replaced by a more transparent IPS screen.
The display effect is not good, which is the reason why the semi-transparent and semi-inverted technology has gradually been eliminated.
Because it has to be transparent and reflective, in fact, both sides are a bit satisfied.
In the indoor scene, it is not as transparent as IPS, not to mention the later OLED.
The color performance is dim, the contrast is not high, the viewing angle is not good enough...
So you may not have any concept, the machine brother to share the parameters of the "true sunshine screen" at that time.
The screen reputation is very high BlackBerry 7290, 2.6 inch screen, the resolution is 240×160, the color is only 65536 colors, that is, 16-bit color.
The display effect in indoor low-light environments is like this.
The biggest advantage of the semi-transparent and semi-reflective screen in the outdoors is probably only the ability to read the text.
As we all know, after entering the era of smart phones, the content on mobile phones has also shifted from text to pictures and videos.
Everyone is working on the color and resolution of the screen.
Half-transparent and half-reverse basically faded out of the mobile phone circle.
Harm, not to mention half-transparent and half-reactionary, LCD that once walked sideways in the screen field is now also stolen from the limelight by OLED.
It is true that OLED is better than LCD in many parameters, but there are still two points that everyone is still criticizing.
The first point is that there are many outdoor sunshine scenes mentioned earlier.
For OLED, a self-illuminating screen, semi-transparent and half-reversible is not feasible in principle, and can only improve brightness.
It will bring problems of power consumption and heat generation, which is one of the reasons why outdoor mobile phones are easier to burn.
The other is the life decay brought about by high brightness, which must be solved by paying the banknote capacity.
On some products designed for outdoor scenes, OLED has no advantage.
For example, a sports watch.
Note that it is not a smart watch, but a watch worn by marathon, mountaineering, and cycling enthusiasts.
Under this category, there are many semi-transparent and semi-reflective LCD screens, or even fully reflective LCD screens.
The second point is the comfort of the eyes.
Although the machine brother's eyes are not so sensitive, he has also heard a lot of complaints.
Some say that the blue light on the screen hurts the eye, and some say that Pwm dimming is blind.
Only a small number of people may be affected, but for them, mainstream OLED and LCD are difficult to solve.
Only two screens can fit their eyes.
One is a reflective LCD, the principle and the trans trans LCD is not bad, but the backlight is completely removed.
The other is the electronic ink screen mentioned at the beginning of the machine brother.
Both of these technologies can be displayed by natural light, so there will be no problems such as pwm dimming and blue light.
Recently, the fame of electronic ink screens has become a little bigger, but the reflective LCD that is about to be forgotten by everyone also has a momentum of making a comeback.
The electronic ink screen saves electricity and has high contrast, and the experience of reading text is infinitely close to paper.
But in terms of color, refresh rate, response speed, service life and touch experience, reflective LCD has absolute advantages, after all, it is also a block LCD.
(Total Reflection LCD)
Of course, the display effect is definitely still a certain gap with mainstream technology.
However, in fact, LCD panel manufacturers have not completely abandoned this technology, and have been applying for relevant patents in recent years.
There are even some innovative product launches.
(Reflective LCD tablet launched by Hisense)
The machine brother simply combed it for everyone, and it was quite emotional.
Semi-transparent and semi-reflective liquid crystal technology was first blown up by everyone by "true sunshine screen".
As a result, within a few years, it was directly dried up by the new IPS and OLED, and it was basically cool on the phone.
Who would have thought that now, by eye protection, it has found hope of survival in another field.
In fact, the machine brother feels that the times are changing, and many technologies have not really been eliminated.
They are simply waiting for an opportunity to make a comeback.
For example... Forget it, let's wait for everyone.