Apple iWatch concept design exposure sapphire plus curved surface display
From the Swiss industrial design website, a new concept design about Apple's latest iWatch is given. Although this is not the official design sample of Apple iWatch, it can still summarize the new technology direction reflected in Apple's smart watch products.
From the picture, iWatch uses a curved surface design, and has a Home button, built-in multiple sensors, with Apple's consistent personal health management features.
Earlier rumors that Apple will use a sapphire screen on iWatch, and use a flexible material LED display , and focus on the integration of the medical industry and smart personal devices, although Apple will officially release iWatch this year, but the rigorous news did not disclose the product Any official details, so we can only first look at the concept rendering from the insiders.
On February 17th, according to foreign media reports, Thomas Lee and David R. Baker of the San Francisco Chronicle reported that Apple hired a famous audio engineer, Tomlinson Holman, to develop iWatch blood for users. The hardware and software functions of mobile monitoring. Tomlinson Holman worked at Lucas Films before joining Apple, leading the development of the cinema sound system THX.
This feature is said to alert you when a user has a heart attack.
According to reports, there is growing evidence that Apple wants to add body monitoring capabilities to iWatch, making it a health-friendly wearable computer. It is worth noting that Apple has communicated with the US Medical Administration and hired medical device related personnel.
There are two main ways of current mainstream: one is the measurement using light reflection, and the other is the measurement using the potential. The former is mainly for photoelectric sensing measurement, and the latter is for electrode sensing measurement. At present, the photoelectric measurement method can mainly measure the heart rate and blood oxygen index, while the electrode type measurement index is more comprehensive, and the electrocardiogram can be directly measured. In this regard, the technical leader of Shennian Zhang Wei explained: For example, our electrode chip extracts a complete ECG, rather than a simple heart rate information. There are many detailed health information in the ECG, such as the PQRST five waveforms. It is the basis for doctors to judge heart health. However, the photoelectric method can't do such a fine heart rate test. It mainly measures the heart rate through light reflection: the photoelectric heart rate is based on the principle that the whole body blood vessels will have slight fluctuations when the heart beats, and a beam of light is emitted onto the wrist of the person. Use the camera to observe the reflected shadows. If there is a slight change, the heart is considered to be beating once. Therefore, the photoelectric heart rate mode has several features as follows.
First, to emit light, so energy consumption;
Second: Inaccurate, because of any interference from external light, a series of misjudgments will occur;
Third, the amount of information contained is small and no more health judgments can be made;
Fourth, in order to enhance accuracy, this technique requires the watch to be placed close to the wrist, reducing external light, making the wearer uncomfortable, and it is difficult to ensure that the watch is not loose during exercise.
Fifth, the ECG solution takes up a small amount of space, and the related hardware of the photoelectric heart rate takes up more space.
However, despite the above shortcomings, the photoelectric measurement can be operated with one hand, and it is not necessary to use two contacts, that is, two hands to detect data, as in the potential mode, so that the data can be actively read and the data can be read remotely, which is more suitable for cooperation. Cloud big data service. "In fact, many shortcomings of the photoelectric method can be adjusted and corrected through the back-end circuit. This is the technical challenge and threshold." Wang Sheng, head of ADI Medical Electronics, said: "Photoelectricity is indeed a big challenge and is greatly affected by the environment. Even different skin colors will affect the signal link, let alone motion. Therefore, the photoelectric type needs to do a lot of processing in the back-end circuit, including the motion removal function." And, he specifically reminded: "For the smart watch manufacturers themselves also have A big challenge. Terminal manufacturers produce a smart watch sample is very simple, but it is difficult to achieve a good experience, debugging takes a long time, see the manufacturer's performance requirements. For example, the aforementioned movement removal, for different sports For example, basketball, football, sit-in, and retreat have to be adjusted differently. Therefore, I think that a smart watch with many health functions is not an ordinary consumer electronic product. Its technical challenge is very big. Without core technology, It’s hard to go down. Unlike a mobile phone, smart watches and bracelets are more differentiated.
Can the electrode ECG measurement be one-handed?
Therefore, relatively speaking, there are more manufacturers that can provide mature electrode-based solutions. The mentioned ADI and ADI are currently the main push-type electrodes.
The electrode type currently has three electrodes and two electrode solutions, that is, three contacts and two contacts (three-finger or two-finger touch are required) to read data, so that the data cannot be actively read. This is the biggest problem with the electrode type, because the consumer needs to consciously measure, and can not automatically measure and upload the number without interruption, and can not achieve remote monitoring. "We originally wanted to add the remote monitoring function of the children to the smart watch for the elderly, but the electrode scheme adopted now cannot actively read the data, and the user needs to use both hands to read the data consciously, which makes our original service idea impossible. Implementation.†Lin Wei, technical director of inWatch, said with regret.
However, there is also good news. Wang Sheng revealed at a small press conference that ADI will soon launch a one-handed physiological potential measurement method. Moreover, he pointed out that for the current two-handed potential method, there are actually many technical challenges, such as power consumption, size, and signal chain adjustment and algorithm. "In which, solving the baseline drift is a problem, which is a key consideration in system design. He believes that regardless of the electrode type or the photoelectric type, the sensor itself is very simple, the latter circuit is the key, and the core of the competition is in the signal adjustment and application algorithm part. "ADI has a variety of business models, which can provide chips directly to customers, customers design their own hardware, software and algorithms; also cooperate with third-party IDH, customers directly adopt their solutions. These IDHs are in the medical and health fields such as ECG and heart rate. There are companies with more than a decade of algorithm accumulation.†He explained that ADI's analog front end has done a lot of adjustment circuits, which is extremely burden-reducing for the back end, so the requirements for the main chip are not high. The main chip can be used by ADI or by the customer. The products that ADI currently demonstrates to customers are based on ADI's own M3 core-based processor.
Compared with ADI, Shennian's products can be compared with turnkey. "Users can basically use it. We not only provide algorithms, but also have good cooperation with Zhongwei Laikang, a third-party remote heart service provider. Customers who use our chips can use the services of Zhongwei Laikang." Zhang Wei said. At the same time, he also revealed that "Shen Nian Technology is developing an updated one-hand heart rate solution, which will soon be released." He did not say what it is, Chang Xu guess is photoelectric.
Ok, now I have to go back to the question that everyone is most concerned about. What kind of technology will iWatch use? Because Apple definitely has a trend-oriented position, its measurement method is too important for followers. Chang Xu’s biggest news broke out here. According to a friend in the supply chain, iWatch is a photoelectric sensor from the drawings. . . In fact, this is also very logical: because the current photoelectric type can achieve one-handed measurement, which can realistically measure and remotely monitor, which is also consistent with Apple's trend toward healthy big data. Therefore, on this iWatch, the main functions are heart rate monitoring and blood oxygen monitoring. ECG measurement is probably not available at present.
As for the blood sugar measurement problem that everyone cares about, will iWatch have it? Because of the online news, Apple digs into the blood glucose monitoring solution developer C8 MediSensors technical director Uyen Bullock and sensor company Senseonics hardware development vice president Todd Whitehurst. Both companies have developed technologies and products that non-invasively detect blood sugar.
"The detection of blood sugar is still invasive, and the data of non-invasive measurement is inaccurate. The reference is of little significance. Because people who are in need of testing blood sugar are more or less present in this area, they need precise Data. From the global progress point of view, blood sugar testing has no consumer-grade products at present, and they are all professional-grade products."
At present, there are not many photosensor solutions that can be matured and suitable for smart watches. Of course, there are many traditional photoelectric sensors, but in smart watches, there is a need for overall improvements in volume, power consumption, signal conditioning, and algorithms. The two companies mentioned above will launch optoelectronic measurement solutions, and Silicon Labs announced the launch of the industry's first single-chip digital ultraviolet (UV) index light sensor IC for smartphones and wearables, except for measuring UV light. In addition to strength, it can also measure heart/pulse rate and oxygen saturation. And the product is ready to provide samples, the price of 10,000 pieces from the purchase price, starting from $ 1.10.
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