Common Terms
2015-09-21
2G
In the mobile phone voice, the second generation of communication protocols use digital encoding mode including GSM, D-AMPS (TDMA) and CDMA. 2G network has been widely used in the world. These communication protocols support high bit rate voice and limited data communication. Which provides such as data, fax and other ancillary services. Most of the 2G protocol provides a different level of encryption, and is located in MHz 925-960, MHz 1710-1785, MHz 1805-1880 or MHz 880-915 and other channels.
3G
In mobile phone voice, the third generation communication protocol supports higher data transmission speed, and its measurement unit is Mbps, the purpose is to provide the application service outside the voice. The application of 3G to support high bandwidth, such as video conferencing, video dynamic and complete Internet access. 3G network must be able to quickly move the user to reach 144 KB wireless data transmission speed, and when the user to reach 384 KBPS wireless data transmission speed, as well as in fixed position, reaching 2 MB per second wireless data transmission speed.
Android system
2005 Google acquisition Android.
November 5, 2007 Google and 34 mobile phone manufacturers, software developers, telecom operators and chip manufacturers to create an open handheld device alliance. The platform is composed of operating system, middleware, user interface and application software, which is known as the first truly open and complete mobile software for mobile terminals.
December 7, 2010, Google officially released Android2.3 operating system.
February 2, 2011, Android3.0 officially released.
September 2011, the number of applications has reached 480000.
October 19, 2011, Google officially released Android 4 operating system.
AF
The full name of Focus Auto, the meaning of automatic focusing. When the cell phone camera, when press the shutter button, according to the target's distance, the electronic distance measuring device can move the camera to control the corresponding position, or rotate the camera to the required position, so that the target imaging is the most clear.
CPU dominant frequency
CPU frequency is the operating frequency of CPU, its working frequency can reflect the performance of CPU to a certain extent, but the CPU of different core architecture of 600MHZ CPU 11 ARM cortex ARM A8 CPU. 600MHZ
Capacitive screen and resistive screen
Capacitive touch screen is a special metal conductive material that is transparent to the surface of the glass. When the fingers touch on the metal layer, the capacitance of the contact changes, making the frequency of the oscillator connected with the frequency of the occurrence of the change, the change of the frequency of measurement to determine the location of the touch information. Resistive screen is the physical location of the X (Y) of the rectangular area by the contact pressure, which is converted to the voltage of X and Y to achieve the control purpose. Distinction: resistance screen as long as the pressure can be triggered, and capacitive screen need to be triggered by human biological sensing. Simply said, the resistance screen can be used with a nail, while the capacitive screen need to use the fingers to operate.
Directional sensor
"The mobile sensor is a device which is installed on the mobile phone to detect the direction of the mobile phone itself, rather than the usual understanding of the function of the compass. Directional sensor or application of angular velocity sensor is appropriate, the general mobile phone on the direction of the sensor is the sensing level of the azimuth, angle of rotation and tilt angle. If there is a direction sensor can be a good play city racing game. And only gravity sensor can play, but the experience is very poor. "
Azimuth sensor
Azimuth sensor: also known as the electronic compass or digital compass, is a way to use the magnetic field to set the arctic. Ancient compass. The modern use of advanced processing technology in the production of magnetoresistive sensor for the compass of digitization has provided the powerful help. Now general useful magnetic sensor and magnetic flux gate processing and electronic compass. This is the electronic version of the compass, with the GPS and the use of maps.
GPU
English full name Processing Unit Graphic, the Chinese translation for the graphics processor". By NVIDIA as presented in the last century the concept, role in cell phones and computers are the same, can put it of course specialized image processing of the CPU. Unlike computers, mobile phones, CPU and GPU are packaged together, so there is no mobile phone card said.
GPS satellite positioning
GPS is via the GPS satellite positioning: positioning accuracy, can be located in the range of 3-5 meters, but in the interior or the valley and other GPS signal can not be located, and positioning time is longer.
Light sensor
Light sensor, which is a sensor, is able to adjust the light and dark in the light of the surrounding light. Is in the light of the local phone will automatically turn off the keyboard lights, and a little more to strengthen the screen brightness, to save electricity and better watch the effect of the screen, in the light of the dark places to open the keyboard lights. Can be set to adjust the tool to turn off. This sensor also plays a major role in saving the mobile phone power.
HSDPA
HSDPA (Speed Downlink Packet Access High) high speed downlink packet access, is a mobile communication protocol, also known as 3.5G, H protocol is higher than 3G, H is your use of data network, if the data network is completely disconnected 3G
IPS hard screen
IPS (Switching In-Plane, flat conversion) hard screen LCD response faster, showing the moving picture is more smooth. It has the following advantages: 1, dynamic image, image without blur; 2, dynamic picture, the response speed uniform; 3, the dynamic picture, color without deviation. At present, apple iPhone 4 is using the IPS screen
