The phone's design must fit under the premise of functional design

The phone's design must fit under the premise of functional design.
In this issue, the phone is the most common in daily life electronic products, particularly in the design need to pay attention to the design of semantic expression. Second, the semantics design method in the product semantics shape design, the main body of the man-made design, how to give practical to bring psychological comfort, pleasure is a very important issue need to be considered in the design. Only the user can successfully use and operation, in order to improve the accuracy of the operation, reduce fatigue and practice. Therefore support whether the product form of semantic understanding is correct, is directly related to the commercial value of the product. To design to sell the user the correct understanding of the shape semantics products, they must first study to support the habit of thinking and cognitive-behavioral characteristics.
Less so at home and abroad EMC / ESD standards. Grounding design. The purpose of the grounding is a zero reference potential, low-impedance path for the signal transmission system, while reducing the system to the outside of the electromagnetic radiation and improve the system itself is the source of interference immunity. The ground in many species, the grounding of the phone are two types of functional earthing and protective earthing. Functional grounding signal separation of the ground, using a large area of ground as far as possible, proximity to ground some of the basic principles. Closely related to grounding and shielding and filtering, a good, reliable ground is a prerequisite for high-quality shielding and filtering. Phone PCB large area ground plane ground and PCB surrounding convergence grounded. Section III mobile phone stack positioning mobile phone stack is a circuit board assembly process, after receiving the phone program to determine the size of the PCB, components of the consultation layout and speaking components mounted on the circuit board in determining the layout. Simple to say the entire board of the mobile phone. Decided to phone stack is the first stage of the entire design process. Phone stack to select, no matter how good the design, can not produce eventually equal to zero. cell phone jammer is working effectively normally within 5-100 square meters.
Figure 2-19 phone EMC shrapnel Figure 2.7.4 ESD protection design cell phone static (Electro-Static) source of manpower conduction and mobile phones on the friction in the pocket. Northern than the southern region is easy to produce static electricity; the weather gets dry, the more easy to produce static. The pathway of the mobile phone of ESD is a gap of chassis and interface such as the SIM card socket, keyboard, headphone, microphone, power connector, USB interface and color LCD and so on.