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Unlike the appearance mode of the three generations, Mi 4 this promotion is no longer uncomfortable, high with low price, but in the conference, the video of the evolutionary trip to a steel plate is the entry point, emphasizing the process Design. Hardware specifications, compared with rice 3, there is basically no change, Qualcomm Snapdragon 801, 5 ", 1080p display, and even support the 4G LTE network of this year's flagship machine, the body stickers high cost, this time Represents the latest top configuration specifications, this weighing and consideration is worth playing ...
Xiaomi 4, February 2013, after 18 months, EwiseTech passed the way to explore Xiaomi 4, which was carved in a year and a half, in a way half of the way, and the Decoration of Xiaomi 4 Unicom version. What kind of test paper.
Throughout the whole machine, Mi 4 is designed in the industrial design, no design is the best designed slot, which is bright, although the structure of the sandwich structure and the metal border is very similar to the iPhone 5S, but it is undeniable, rice 4 Body, indeed possessed the work of the past.
Xiaomi 4 has different consequences, using a non-detachable rear shell design, the back is a certain radiator, so that the design can provide a relatively large space for the battery and the rear camera, on the other hand to enhance the grip of the phone .
This time I found some previous design processing by disassembling within Xiaomi 4:
1: The USB interface of Xiaomi 4 is at the bottom of the fuselage, next to the speaker, using a rule-shaped rectangular interface, not a standard ladder interface. From a cost, this unconventional standard interface needs to be customized separately. It is relatively high. It will naturally be high. From the perspective of the machining process, since rice 4 is used in stainless steel metal borders, the formation of the interface is passed through stamping The formation of this rule is more uniform when the impact is molded, and the good product rate is relatively higher.
2: Thanks to its stainless steel border, the ultra-narrow border design of the Xiaomi 4 display is more secure. The stainless steel strength is high, and the display can have a better protective effect on the display. Relatively speaking, the border of the whole machine can also be narrower. The thickness outside the millet 4 screen is only 0.42mm.
3: The four corners of the frame in Xiaomi 4 have an additional screw reinforcement, anti-fall design, which also has mentioned in the official website product introduction. The addition of these four screws makes the stainless steel border and the intermediate alloy framework contact more reliable protection for the entire mobile phone, especially the screen component. Because the four angles are the most sharp places in the mobile phone, for example, if a corner is falling, the impact will be the largest.
4: There are two four injection molded lines in the top of the phone and the bottom of the phone. Because metal borders and fusems have been achieved very early in iPhone and HTC, because the radio frequency signal cannot penetrate metal, this antenna overflow design designed for an antenna radio frequency signal is not difficult to understand.
5: Xiaomi 4 mobile phone uses three MEMS microphones, dual-wheat noise regimens. One of the two sides of the motherboard, and another (main microphone) is attached to the USB connector / vibrator module. The two of the motherboards are the way to take back pickups, so that the microphone is designed on one side of the motherboard, the sound film is designed in the back of the microphone position, take the main board to harvest the sound, this treatment is dismantled It is not common in your phone. It is easy to infer whether such design reduces assembly cost and increase efficiency. (Next)
6: The narrowness of the screen border is also an embarrassment of the compulsory technology of mobile phone manufacturers. The more and more mobile screen begins to focus on the design of narrow borders, in addition to providing a larger display area of the mobile phone, ultra-narrow border The implementation also highlights the comprehensive strength of the manufacturer behind the mobile phone. Why is the ultra-narrow border do not implement? First, the ultra-narrow display border means the oversight of the head, the frame of the machine is relatively large for the protection of mobile phones, and it is a test for the anti-falling shock of the body; secondly, the edge of the screen must be designed Some circuits, the width of this part is bound to affect the narrowness of the screen border. Xiaomi 4 Box We measured 2.74 mm, as follows as a micrograph of the circuit part on the touch screen.
7: Xiaomi 4 circuit motherboard manufacturers for Compeq, Huatong Computer Shares, Taiwan's printed circuit board manufacturing company. This is also our first time I saw the manufacturer's Mark on the motherboard. Through the motherboard information dismantled by mobile phones, we are not difficult to see that with the iteration of the product, the motherboard of Xiaomi can be clearly seen.
Longitudinal analysis of the motherboard of Xiaomi 4, the number of PCB layers is 10 floors.
The motherboard is long, a total of 10 layers.
8: Back cover material: TD (enhanced modification) PC is an improved material.
9: By the dismantling perspective below, it is not difficult to infer the assembly process of Xiaomi 4, and the components tend to modularize.
10: The camera module of Xiaomi 4, the 6-piece plastic lens, the focus module used by VCM focus motor. The hardware module of the camera is similar to the Galaxy S5.
Summary:
Regardless of the experience and use of the whole machine or the dismantling of the mobile phone, it is indeed possible to see that the ability of millet in design and production process is ripening. Although still selling price of 1999, from the perspective of price / performance, we did not use the current top hardware configuration, we can boldly guess the reasons, maybe some considerations are this beginning, Xiaomi consciously improve the brand premium, enhance the brand value. .
EwiseTech is a high-tech Internet company dedicated to electronic product analysis, providing a global customer with a deep hardware analysis of electronic mobile terminals and emerging technologies, including mobile phones, tablets, and wearable devices, and full-hardware and software test services. For more information and dismantling analysis, please visit www.ewistech.com.
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