Looking at this year, no matter whether it is a high-end flagship mobile phone or a low-end mobile phone, almost all of them have adopted a comprehensive screen. It can be said that this year is a year in which the full-screen is really popular. In the process, some problems have to be faced, such as being screened. What are the positions of the handsets, sensors, etc.? What should I do with the front camera? Unlock it? This is a question for the manufacturers who are looking for the ultimate screen ratio to face and solve.
Among them, the most controversial is to be unlocked. Since Apple released the iPhone 5s in 2013, the fingerprint has become the standard for mobile phones. From the flagship to the thousand yuan machine, the only difference is that some are on the front. Some are on the back. However, the full screen is inherently incapable of coexisting with the frontal physical fingerprints (of course, the back fingerprints are also said), so each manufacturer showed 18 martial arts.
Screen fingerprint
The first is the screen fingerprint technology of vivo. Since the rise of the full screen, the sound of the screen fingerprint has not been broken. Until last year, the mystery of the vivo displayed on the MWC in Shanghai was slowly unveiled. At that time, the vivo used Qualcomm ultrasonic fingerprint. Solution, but the experience in recognition rate and recognition area is not ideal.
Subsequently, on CES 2018, vivo again showed the X20 Plus, but unlike the previous ultrasonic fingerprints, this time changed to optical fingerprint recognition, the partner was also replaced by Qualcomm as Synaptics (Xinsi), and X20 Plus (domestic sale) The version is X20 Plus UD) equipped with Synaptics' Clear ID FS9500 optical screen fingerprint sensor.
The principle is that the finger is placed on the optical lens, and the light source adapted to the OLED screen emits light to reach the finger and emits different light patterns, and is received by the sensor under the screen to realize fingerprint recognition. The theory is to use optical fingerprint recognition to realize screen recognition. Simply place the sensor under the screen and the light source is provided by the screen.
The reason why the screen fingerprint needs the screen of the OLED is because the conventional TFT-LCD screen has poor light transmittance, and the light reflected by the fingerprint after passing through the TFT layer reaches the sensor, the recognition difficulty is high, and the recognition rate is low. OLED screens not only have self-illuminating properties, but also have a thinner structure. The illuminating light can pass between its RGB pixel points to reach the sensor, thus making it easier to unlock the screen.
Vivo's latest flagship vivo NEX is equipped with the third-generation screen fingerprint technology. Compared with the previous generation, the fingerprint pattern accuracy is increased by 50%, and the image range is wider, which reduces the fingerprint rejection rate (FRR) by 30%. Speed increased by 10%.
Screen fingerprinting is indeed a good solution to solve the full screen unlocking, and it does not affect the user's usage habits. The experience is closest to the previous mobile phone. However, the fingerprint identification area is limited, the film is affected, the screen, security, wet The effect of various factors such as unlocking the hand, if the eye is stretched, the screen fingerprint is likely to be just a transitional solution.
3D structured light
As high as the screen fingerprints, the 3D structure is light. Last year, Apple canceled the Touch ID that it built on the iPhone X, and replaced it with Face ID. Apple's entire upstream and downstream of the mobile phone industry and software development ecology. The influence is unquestionable. Although the face and hands are both biometric, the difference is still very large.
On the iPhone X, Apple must have weighed against Touch and the nuisance of the bangs, but Apple, which has always experienced the first experience, has abandoned a certain degree of aesthetics and launched a 3D structured light, just like the back antenna that was madly spit. .
But looking back, Apple has inserted an infrared lens, a flood sensor, a distance sensor, an ambient light sensor, a speaker, a microphone, a 7 megapixel front camera and a dot matrix projector in this 'bang'. Sensors, you will not be able to admire. In the mobile phone such as the gold-sized electronic products, there is really no waste of space.
The principle of 3D structured light unlocking lies in the original deep-sensing camera system consisting of an infrared lens, a flood-light sensing element, etc., which projects a unique 'profile' through more than 30,000 spots that are invisible to the naked eye. The infrared lens reads the dot pattern and captures its infrared image, then sends the data to the security isolation area in the A11 biochip, confirming that it matches the known 'spectrum'. The floodlight sensing element can be used without Visible infrared light helps identify the user's face in the dark.
Unlike the face recognition of domestic mobile phones, the 3D structure light is three-dimensional, so the security is greatly improved. Of course, if the 3D structure light is only used for unlocking, it is too wasteful, and future authentication, payment, AR, etc. will be In this case, in addition, the current Animoji and portrait light effects on iPhone X are also based on this implementation.
Therefore, the 3D structure light seems to be so beautiful, but the only thing that is currently criticized is that to achieve these functions, you have to endure the positive bangs. Of course, with the advancement of technology, the sensor components will be Gradually shrinking, the area of Liuhai will be reduced accordingly, but with the release of vivo NEX and OPPO Find X, the screen ratio is super high and there is no bangs screen belt to bring consumers a new visual experience, so the consumer's request is also More and more high: not only the area is small, it is best to cancel directly.
Of course, I believe that in the future, mobile phones equipped with 3D structured light may not have bangs, because now all the fingerprints have been made, other sensors should be possible, but not now.
TOF 3D sensing technology
As mentioned above, last year's Shanghai MWC, Vivo exhibited screen fingerprints. After a year, Vivo once again showed black technology on Shanghai MWC: TOF 3D sensing technology. Also unlocked, but TOF 3D sensing technology really Different.
3D TOF imaging principle
TOF is the abbreviation of Time of Flight. It can be seen from the name that it is related to the time of flight of light in the air. It is intended to continuously transmit light pulses through the target, and then receive the light returned from the object by the sensor. The flight of the light pulse (round trip) time to get the target distance. With 3D structured light, binocular stereo imaging is the three 3D machine vision solutions currently used in the industry.
Therefore, the TOF 3D sensing technology of vivo is to generate near-infrared light, and the sensor calculates the return time difference between the infrared light and the target touch, thereby realizing stereo vision.
The same as the 3D structured light, the TOF 3D sensing technology is also three-dimensional, and it can obtain fine depth information, so the security is more secure. However, compared with the architectural light, the TOF 3D effective depth information point is up to 300 million. 10 times the structure of 3D light.
Moreover, compared to the bangs with a wide 3D structure, the TOF 3D sensing technology has a smaller overall module, so its bang area will be smaller.
In addition, the TOF 3D sensing technology is farther away than the 3D structure light recognition distance, and the vivo scale can be extended to 3 meters, which greatly expands the use of scenes, such as 3D fitting, 3D photography, MR somatosensory games and other long-distance application scenarios.
In addition, more importantly, TOF 3D is more mass-produced. The iPhone X is sold under the name of the most expensive iPhone ever. This is naturally the result of countless consumers, and the iPhone X is expensive. Part of the reason is that 3D structure light production is difficult, but TOF 3D does not have this problem, its mass production difficulty is relatively small, so the price of mobile phones equipped with TOF 3D will be more close to the people, which can make more consumption People enjoy this technology.
Finally, TOF 3D has an advantage, its baseline requirements are basically zero, so the body ID design is more flexible, providing more possibilities for future mobile phone form.
The application scenario is also a very important factor limiting the development of a technology. In this regard, vivo currently shows us its 3D modeling, and future face recognition, 3D photography, AR, etc. will be applied to this technology. In terms of shopping, 3D fitting will allow users to try on the clothes even if they don't leave home, easily choose the clothes that suit their size, as well as somatosensory games and so on.
Moreover, it is worth mentioning that vivo also cooperates with WeChat deeply. 3D TOF super-sensing technology will also support WeChat face payment. At that time, vivo will also become a mobile phone manufacturer that supports WeChat face payment.
Moreover, a more exciting news, vivo said that the mobile phone equipped with this technology can be mass-produced in the second half of this year, so this year consumers can enjoy this technology. According to vivo's previous screen fingerprint experience, This year's vivo mobile phone with TOF 3D should not be bad, so it is still very exciting.
3D TOF super induction technology schematic
TOF 3D talked so much, it seems that there is still a very important point. I mentioned that TOF 3D is smaller than the 3D structured optical module and has a smaller baseline requirement. However, it still needs to be left behind. Some areas will be loaded. Some people may have doubts, Vivo already has NEX, no bangs on the front, the screen accounted for 91.24%, no conflict?
Of course, there is no conflict. Although vivo NEX does not have bangs, but only with screen fingerprints, the above mentioned functions can not be achieved. Moreover, compared to the screen fingerprint, the TOF 3D of the 'face' is obviously more futuristic, and the application scene is more Broad, the early layout of the vivo is naturally reasonable. Moreover, the future does not rule out that the vivo can make the TOF 3D under the screen, or integrated into the lift camera.
So, everything is on the road, everything is full of imagination, before the dust falls, everything is possible.
Technology, change life. This sentence is being staged around us.
Looking at this year, no matter whether it is a high-end flagship mobile phone or a low-end mobile phone, almost all of them have adopted a comprehensive screen. It can be said that this year is a year in which the full-screen is really popular. In the process, some problems have to be faced, such as being screened. What are the positions of the handsets, sensors, etc.? What should I do with the front camera? Unlock it? This is a question for the manufacturers who are looking for the ultimate screen ratio to face and solve.
Among them, the most controversial is to be unlocked. Since Apple released the iPhone 5s in 2013, the fingerprint has become the standard for mobile phones. From the flagship to the thousand yuan machine, the only difference is that some are on the front. Some are on the back. However, the full screen is inherently incapable of coexisting with the frontal physical fingerprints (of course, the back fingerprints are also said), so each manufacturer showed 18 martial arts.
Screen fingerprint
The first is the screen fingerprint technology of vivo. Since the rise of the full screen, the sound of the screen fingerprint has not been broken. Until last year, the mystery of the vivo displayed on the MWC in Shanghai was slowly unveiled. At that time, the vivo used Qualcomm ultrasonic fingerprint. Solution, but the experience in recognition rate and recognition area is not ideal.
Subsequently, on the CES 2018, vivo again showed the X20 Plus, but unlike the previous ultrasonic fingerprints, this time changed to optical fingerprint recognition, the partner was also replaced by Qualcomm as Synaptics (Xinsi), and X20 Plus (domestic sale) The version is X20 Plus UD) equipped with Synaptics' Clear ID FS9500 optical screen fingerprint sensor.
The principle is that the finger is placed on the optical lens, and the light source adapted to the OLED screen emits light to reach the finger and emits different light patterns, and is received by the sensor under the screen to realize fingerprint recognition. The theory is to use optical fingerprint recognition to realize screen recognition. Simply place the sensor under the screen and the light source is provided by the screen.
The reason why the screen fingerprint needs the screen of the OLED is because the conventional TFT-LCD screen has poor light transmittance, and the light reflected by the fingerprint after passing through the TFT layer reaches the sensor, the recognition difficulty is high, and the recognition rate is low. OLED screens not only have self-illuminating properties, but also have a thinner structure. The illuminating light can pass between its RGB pixel points to reach the sensor, thus making it easier to unlock the screen.
Vivo's latest flagship vivo NEX is equipped with the third-generation screen fingerprint technology. Compared with the previous generation, the fingerprint pattern accuracy is increased by 50%, and the image range is wider, which reduces the fingerprint rejection rate (FRR) by 30%. Speed increased by 10%.
Screen fingerprinting is indeed a good solution to solve the full screen unlocking, and it does not affect the user's usage habits. The experience is closest to the previous mobile phone. However, the fingerprint identification area is limited, the film is affected, the screen, security, wet The effect of various factors such as unlocking the hand, if the eye is stretched, the screen fingerprint is likely to be just a transitional solution.
3D structured light
As high as the screen fingerprints, the 3D structure is light. Last year, Apple canceled the Touch ID that it built on the iPhone X, and replaced it with Face ID. Apple's entire upstream and downstream of the mobile phone industry and software development ecology. The influence is unquestionable. Although the face and hands are both biometric, the difference is still very large.
On the iPhone X, Apple must have weighed against Touch and the nuisance of the bangs, but Apple, which has always experienced the first experience, has abandoned a certain degree of aesthetics and launched a 3D structured light, just like the back antenna that was madly spit. .
But looking back, Apple has inserted an infrared lens, a flood sensor, a distance sensor, an ambient light sensor, a speaker, a microphone, a 7 megapixel front camera and a dot matrix projector in this 'bang'. Sensors, you will not be able to admire. In the mobile phone such as the gold-sized electronic products, there is really no waste of space.
The principle of 3D structured light unlocking lies in the original deep-sensing camera system consisting of an infrared lens, a flood-light sensing element, etc., which projects a unique 'profile' through more than 30,000 spots that are invisible to the naked eye. The infrared lens reads the dot pattern and captures its infrared image, then sends the data to the security isolation area in the A11 biochip, confirming that it matches the known 'spectrum'. The floodlight sensing element can be used without Visible infrared light helps identify the user's face in the dark.
Unlike the face recognition of domestic mobile phones, the 3D structure light is three-dimensional, so the security is greatly improved. Of course, if the 3D structure light is only used for unlocking, it is too wasteful, and future authentication, payment, AR, etc. will be In this case, in addition, the current Animoji and portrait light effects on iPhone X are also based on this implementation.
Therefore, the 3D structure light seems to be so beautiful, but the only thing that is currently criticized is that to achieve these functions, you have to endure the positive bangs. Of course, with the advancement of technology, the sensor components will be Gradually shrinking, the area of Liuhai will be reduced accordingly, but with the release of vivo NEX and OPPO Find X, the screen ratio is super high and there is no bangs screen belt to bring consumers a new visual experience, so the consumer's request is also More and more high: not only the area is small, it is best to cancel directly.
Of course, I believe that in the future, mobile phones equipped with 3D structured light may not have bangs, because now all the fingerprints have been made, other sensors should be possible, but not now.
TOF 3D sensing technology
As mentioned above, last year's Shanghai MWC, Vivo exhibited screen fingerprints. After a year, Vivo once again showed black technology on Shanghai MWC: TOF 3D sensing technology. Also unlocked, but TOF 3D sensing technology really Different.
3D TOF imaging principle
TOF is the abbreviation of Time of Flight. It can be seen from the name that it is related to the time of flight of light in the air. It is intended to continuously transmit light pulses through the target, and then receive the light returned from the object by the sensor. The flight of the light pulse (round trip) time to get the target distance. With 3D structured light, binocular stereo imaging is the three 3D machine vision solutions currently used in the industry.
Therefore, the TOF 3D sensing technology of vivo is to generate near-infrared light, and the sensor calculates the return time difference between the infrared light and the target touch, thereby realizing stereo vision.
The same as the 3D structured light, the TOF 3D sensing technology is also three-dimensional, and it can obtain fine depth information, so the security is more secure. However, compared with the architectural light, the TOF 3D effective depth information point is up to 300 million. 10 times the structure of 3D light.
Moreover, compared to the bangs with a wide 3D structure, the TOF 3D sensing technology has a smaller overall module, so its bang area will be smaller.
In addition, the TOF 3D sensing technology is farther away than the 3D structure light recognition distance, and the vivo scale can be extended to 3 meters, which greatly expands the use of scenes, such as 3D fitting, 3D photography, MR somatosensory games and other long-distance application scenarios.
In addition, more importantly, TOF 3D is more mass-produced. The iPhone X is sold under the name of the most expensive iPhone ever. This is naturally the result of countless consumers, and the iPhone X is expensive. Part of the reason is that 3D structure light production is difficult, but TOF 3D does not have this problem, its mass production difficulty is relatively small, so the price of mobile phones equipped with TOF 3D will be more close to the people, which can make more consumption People enjoy this technology.
Finally, TOF 3D has an advantage, its baseline requirements are basically zero, so the body ID design is more flexible, providing more possibilities for future mobile phone form.
The application scenario is also a very important factor limiting the development of a technology. In this regard, vivo currently shows us its 3D modeling, and future face recognition, 3D photography, AR, etc. will be applied to this technology. In terms of shopping, 3D fitting will allow users to try on the clothes even if they don't leave home, easily choose the clothes that suit their size, as well as somatosensory games and so on.
Moreover, it is worth mentioning that vivo also cooperates with WeChat deeply. 3D TOF super-sensing technology will also support WeChat face payment. At that time, vivo will also become a mobile phone manufacturer that supports WeChat face payment.
Moreover, a more exciting news, vivo said that the mobile phone equipped with this technology can be mass-produced in the second half of this year, so this year consumers can enjoy this technology. According to vivo's previous screen fingerprint experience, This year's vivo mobile phone with TOF 3D should not be bad, so it is still very exciting.
3D TOF super induction technology schematic
TOF 3D talked so much, it seems that there is still a very important point. I mentioned that TOF 3D is smaller than the 3D structured optical module and has a smaller baseline requirement. However, it still needs to be left behind. Some areas will be loaded. Some people may have doubts, Vivo already has NEX, no bangs on the front, the screen accounted for 91.24%, no conflict?
Of course, there is no conflict. Although vivo NEX does not have bangs, but only with screen fingerprints, the above mentioned functions can not be achieved. Moreover, compared to the screen fingerprint, the TOF 3D of the 'face' is obviously more futuristic, and the application scene is more Broad, the early layout of the vivo is naturally reasonable. Moreover, the future does not rule out that the vivo can make the TOF 3D under the screen, or integrated into the lift camera.
So, everything is on the road, everything is full of imagination, before the dust falls, everything is possible.
Technology, change life. This sentence is being staged around us.
