Mobile payment holds fire fingerprinting application

In the wake of the wave of mobile payments, fingerprint identification technology has gradually become one of the focuses of mobile phone manufacturers. Since the iPhone 5S was launched in 2013, more and more mobile phones have added fingerprint recognition functions, such as the Samsung S5, Huawei Mata 7, OPPO N3, and the recently released MX4 Pro, making the fingerprint identification chip a “hot chicken” for a time. Industry insiders predict that fingerprint identification is likely to usher in blowout in 2016.

Comprehensive performance push-type higher than a sliding type

In terms of function, fingerprint recognition is divided into pressing and sliding. No matter which method is to be applied in the market, it is necessary to reduce the refusal rate and false-false rate of the fingerprint recognition function as much as possible. To achieve high precision, we must overcome some external factors (such as the ambient temperature, the cleanliness of the finger surface, etc.) and the user's personal skin conditions (such as less fingerprint features, peeling, etc.). Which method is more accurate in terms of technology?

Shi Taiyi, general manager of Shanghai Si Li Microelectronics Co., Ltd. (hereinafter referred to as “Si Li Micro”), said in an interview with the author: “In terms of image quality, press type is better, because if the slide type, the finger will change, so The stability of the image is not as good as that of the press type, and from this point of view, the accuracy of the press type is higher, and the refusal rate and the falsification rate are also related to the area size of the sensor, but overall, the stability, reliability, and use of the press type. Convenience is better than sliding, for example, the resolution of an image is 508dpi, and the recognition rate of press-type products of the company can achieve 1/50000, and the sensor of large-size rejects can be less than 1/100. Smaller size sensor is less than 1/50."

For users, in addition to "precise", but also "fast." Due to the differences between push-type and slide-type structures and algorithms, there is also a difference in the speed of recognition between the two. As for the fast and slow, Stellite general manager Cheng Tai-yi believes that the press type will be faster, because sliding images need to be stitched, so the image formation is slower than pressing. At present, the main products of the Microelectronics's GSL6162 and GSL6172 are press type, and the unlocking speed is within 500ms.

Today, smart phones are almost an integral part of the human body. Many users are keen on frequent viewing of space, micro-blogs, circle of friends, and web browsing. Frequent operations are bound to use fingerprint recognition frequently. Frequently activate the sensor. If you keep the sensor in the active state for a long time, it will definitely increase the power consumption of the system and reduce the battery life. For this phenomenon, Cheng Tai-yi believes that if it is merely activated, there is almost no difference between push-type and sliding-type; if it is in use, the push-type is lower in power consumption than the slide-type.

Experience a better future smart phone market will be unified

The quality of the user experience is an important factor in verifying whether the product can be marketized. Because there are differences in the appearance and size of smart phones, some mobile phones (such as vivo Xplay3S) will use ICs to better facilitate the use of fingerprint recognition functions. On the back of the phone, slide-type fingerprint recognition is used under the camera. Some mobile phones (such as the MX4 Pro) implant the IC into the Home button and use push-type fingerprint recognition. Cheng Taiyi believes that the two different ways are presented, mainly related to the structure of the mobile phone. The IC is placed behind because the border of the Home key area in front of the mobile phone is relatively narrow and is not suitable. This is why we have introduced a rectangular GSL6172. It is more suitable for placing on a narrow round frame mobile phone. In the user experience, it is definitely better to press, because pressing is the action of human instinct, unlike sliding this action requires learning, more in line with the user's habits.

Judging from the new smart machines released at this stage, the press type has achieved an overwhelming victory. However, the press type has no advantage over the sliding type in terms of price or volume, but the market selection is pressing type. For this state of development, Cheng Taiyi explained that the greatest benefit of fingerprint recognition is convenience and security. User experience still takes precedence over cost. Although the sliding type is cheap, the cost is not too low. There are also 1-2 dollars, if only With this function, the significance is not great. If you want to use it, then use a better solution, so in this respect the push market will be better.

Although the press type is good, it is currently only configured on some medium- and high-end models, and models with less than RMB 2,000 have almost no such features. If you want to achieve popularity in smart phones, Cheng Taiyi believes that the biggest difficulty is demand and ecosystems. For example, mobile payments, if there is a more convenient and secure payment environment, the demand for payment will become very strong. Once the payment becomes stronger, the related applications and back-end systems will be more complete, thereby accelerating the entire ecosystem. Construct. If it is purely for differentiation, the slow demand will be reduced and it can only be used in some mobile phones.

When it comes to push-type and slide-type applications in the future smart phone market, Cheng Tai-yi believes that push-type will be unifying, and the sliding type will likely exit the “historical stage”. Even if it exists, it is only at a low level. Side smart machine. In the face of this development trend, Si Liwei has been actively deploying. There will be push-type new products introduced every quarter in 2015. The new products will be significantly improved in terms of cost performance and sensitivity, which will further increase the product recognition rate.