Oh? Valroga looked interested, and looked deaf: since the T3 board still has some research on this? Although it is a little incomprehensible, it is not impossible, at least the comprehensive digital glass cockpit display system designed by himself and others is jointly designed by the little boss and his two sisters, from this point of view, it should be very possible.

Thinking like this, Valroca's expression also became serious, with a respectful face and a look of deafness.

Zhang Lan didn't pay attention. To this change in Varoga, he said to himself, "I know that the car head-up display system is actually strict. It is not a single electronic system, its structure should also be made of electricity. Sub-components, display components, controllers and high-voltage power supplies and other integrated electronic display equipment, from this point of view, in fact, it. and the use of head-up displays on fighter jets from a technical point of view. It's basically the same, but since we're going to integrate this thing with the front windshield of the car, then this technology is a . Image key: I think it should be in optics and materials science that a transparent high refractive index plating. Membranes are the true foundation of imaging. ”

"Yes, that's it!" Hearing Zhang Lan say this, Varoga's eyes lit up: I didn't see that this little boss of mine really had two brushes! In one sentence, the key to this technology is revealed. In fact, the head-up display used on the fighter jet also uses such a transparent high refractive index coating, which is also the most critical place where the fighter head-up display can display data.

Zhang Lan did not feel the slightest surprise at Valroga's affirmation: this is the future of technological development! What's there to be surprised about?

"Of course, this film does not exist alone, it is the surface functional part of this special front windshield that we are going to use, so for you, this special car front windshield production technology with display function is the most important thing, and it is also the problem you should solve the most." Well, although I don't know what this special car windshield with display function should do, and I don't know what special components are in its display area, I do know that the refractive index of ordinary car windshield is generally around 1.52. ”

This is a fact, no matter what kind of car front windshield, in order to ensure that the windshield can not hurt people when it is broken in an accident, it is different from ordinary household glass with very sharp edges and corners after it is broken, and a good car has a layer of glue in the middle of the front windshield, which is still a whole piece after shattering, and will not scatter and splash, even if it is a little bit of non-laminated front windshield, it is broken into small pieces without edges and corners after shattering, and it will not hurt people. It is precisely this characteristic that, unlike the high light transmittance type of ordinary glass, the refractive index of the front windshield of the car is very high, and it will be as high as 1.52 right.

After a pause and a breath, Zhang Lan continued, "Then I think there is no doubt that the refractive index of light in the part of the special front windshield that functions as a head-up display should be greater than 1.52, but not too much, and the refractive index of other normal windshield parts should also be 1.52 right." Personally, I think it's better to have a light refractive index between 1.8 and 2.2 in the area that acts as part of the HUD function. Because his refractive index is higher than that of the front windshield, the reflectivity of the surface can be increased, and after multiple light interferences, it can be imaged at a distance. In this way, the driver's vision will not be affected by the refractive index being too high, and the required information will not be displayed in this area due to insufficient refractive index or the information displayed will not be clear. ”

Of course, I know what to do, mainly using the impregnation method and screen printing method; I also know the ingredients it contains, it contains oxidized Ti and Si, but I said it all, what else do you guys do? While talking to these guys, Zhang Lan was still making her own little abacus in her heart: Master, I am exercising your ability to think independently.

Varroga didn't know the little Jiujiu in Zhang Lan's heart, and when he heard Zhang Lan say it for a long time, now this guy's eyes have lit up again like a 100 incandescent light bulb, looking at Zhang Lan's appearance and the last time Zhang Lan and Xiao Chenxi and Alice came, this guy's gaze at Xiao Chenxi and Alice was similar: the five bodies that admired this little boss of himself in his heart: for such technical details, this guy actually understands, alas, it's a waste for such a person not to engage in technology!

just inadvertently glanced at this guy, Zhang Lan felt a chill in his heart, and couldn't help but shiver: In other words, being looked at by a man with this kind of gaze makes people feel that this guy is from the back of the mountain.

Quickly look away from yourself. Zhang Lan doesn't care what this guy thinks in his heart. He continues to talk about his piracy from the future of knowledge - which can be found now. "This transparent magnified reflective film is used in automotive head-up display systems. Now that we've decided to choose

I display a color systematically with green as a stuffy car head-up display. I: The color spectrum reflects peak wavelengths. It's about 530 meters. The light transmittance is around 70%. Other words. The thickness of the film that we use on the front windshield to display information should also be around 530 meters. This ensures that our products can be played perfectly with the information we need. ”

In fact, it does. That's right. The peak wavelength of the green light spectral emission is indeed around 530 nanometers. And the light transmittance is also. It's about 70 percent. The cost of this in-vehicle head-up display system is also. Lowest ground. That's why most of the older generation of HUD display systems in cars are mostly green.

This. Time. Hearing. Zhang Lan said so much. Valogar's mouth was already starting to close: his own little boss. on this thing. How can the research be so deep? Or did he just flip through the information casually? My God. I do it every day. I don't know how many times I looked through these materials. Sometimes you need to go back and look at it again.

As for the colleague next to Varoga. The reaction was similar to that of Varoga: the last time Zhang Lan came to the electronics research laboratory. There are two of their own teachers, Xiao Chenxi and Alice. Zhang Lan, her own little boss, didn't say much. Just asked some questions. My knowledge of him is limited to the questions he asks. According to the questions he asked. I thought that this little boss should have some understanding of avionics technology. But it's far from being in-depth. But now it seems. It's not a matter of understanding. It's very in-depth! ,

"Of course. This head-up display system is cheap though. But he still has his own inherent shortcomings. Zhang Lan didn't notice the change in the expressions of the people at the scene. Now this kid is frowning, struggling to recall some knowledge about the car head-up display system in his previous life. So that when Xiao Chenxi and Alice are not there. I can fool these guys myself.

At this moment, Zhang Lan was extremely annoyed: Why did she forget to bring these two little girls, why did she come here stupidly by herself?

It's just that Zhang Lan's frowning action, in the eyes of Varoga and his group of subordinates, has become another expression of dissatisfaction with the work of himself and others.

Zhang Lan naturally didn't notice this, and still said to herself, "Its disadvantage is not only that the color is monotonous, but also that it will cause changes in the appearance of interference colors with different directions." So I think we can use this technology as the first generation of our in-car head-up display system. In the future, we can achieve different colors of display by increasing the thickness of the projection carrier film of the head-up display, which also forms the foundation for the continuous development of this technology in the future. ”

At this point, Zhang Lan subconsciously asked Valoga, "If what I said is correct, the integrated digital glass cockpit display system you are engaged in uses red light, and the peak wavelength of red light is longer than that of green light, so the thickness of the transparent high refractive index coating used on your head-up display." It should be a little thicker than the thickness of the transparent high refractive index coating on a normal head-up display, right? ”

"What you said is good," when answering Zhang Lan's words, Varoga had already subconsciously used honorifics, "The thickness of the film we use to display red light is exactly the thickness of the peak wavelength of the spectrum of red light. ”

Zhang Lan nodded, "Since we can achieve different colors of display by increasing the thickness of the projection carrier film of the head-up display system, can we assume such a possibility?" ”

At this point, Zhang Lan became excited, and grabbed Varoga's arm tightly, "When the thickness of this projection carrier film is increased to a certain extent, it will be able to support the reflection of the entire visible light spectrum region, so that we can achieve the multi-color display of the head-up display and the uniform appearance independent of the angle?" ”

"This," Valoga, who was grabbed by Zhang Lan's arm, looked painful: It hurts, how can this guy have so much strength at such a young age? But now, although it is painful, he can't help but answer Zhang Lan's words, "This, theoretically, is no problem, but compared with the monochrome car head-up display system, it needs a higher brightness light source support, the power required is stronger, and the cost will be higher." ”

"There is no problem with this," Zhang Lan smiled, "When this technology was first developed, we only applied it to the highest-grade Longxuan Nine Series models. With the development of technology, our cost is gradually reduced, and the technology is gradually mature, we can use the low-tech on-board head-up display system in the intermediate car, the high-tech on-board head-up display system in the middle and high-end cars, and then the highest-tech on-board head-up display system in our luxury car series. ”