触屏手机（Touch screen mobile phone）

触屏手机（Touch screen mobile phone） 触屏手机(Touch screen mobile phone) [editor this paragraph] general situation Today, popular in the mobile phone market began to touch technology, touch screen mobile phone manufacturers to become the focus of competition. IPhone, after several years of hard work of various manufacturers, touch screen technology has become the mainstream technology products the next phase of the application configuration is a foregone conclusion. Samsung, Dopod, NOKIA, Sony Ericsson and many other manufacturers have also in the field of force, the touch screen mobile phone features emerge in an endless stream. In this game of fierce competition and the major manufacturers, the winner will also touch trendsetter. [editor this paragraph] definition and characteristics Refers to the use of touch screen mobile phone touch screen technology, a type of mobile phone application in the mobile phone screen. No clear boundaries of touch screen mobile phone and other mobile phone classification. A touch screen mobile phone also can be called straight, intelligent mobile phone, mobile phone mobile phone, mobile phone music. Touch screen mobile phone is characterized by its large screen, the user can bring visual enjoyment, no matter from the text or images are reflected in large screen features. But because of the big screen, the volume is relatively large, to carry the touch screen mobile phone space is big. At the same time, touch screen mobile phone can use a finger manipulation, a perfect substitute for the keyboard. In the extending function, touch screen mobile phone games have limitations, such as role-playing games, fighting games such as keyboard easy to operate. In the aspect of software, the windows mobile phone system is rich, however limitations or for the Symbian platform for mobile phone. [editor this paragraph] working principle For the convenience of operation, people use the touch screen to replace the mouse or keyboard work, we must first with your fingers or other objects touch touch screen display mounted on the front end, and then according to the finger touch icon or menu location selection information input by the touch screen test components and touch screen controller; touch detection components are installed in front of the display screen for detecting user touch position, accept after the touch screen controller; the main function and touch screen controller is receiving the touch information from the touch detection device, and convert it to contacts, and then sent to CPU, at the same time it can receive the CPU command and execute. [editor this paragraph] functional classification 1 infrared touch screen The infrared touch screen, the principle is very simple, just on the display with light from the frame, without coating on the surface of the screen or the controller connected with spot frame edges arranged from the infrared transmitting tube and infrared receiving tube, a network user formed on the surface of the screen with a finger touch screen of a point, will blocked after the location of horizontal and vertical two infrared computer can immediately calculate the location of the touch point infrared touch screen is not affected by the current voltage and electrostatic interference, suitable for some harsh environmental conditions are the main advantages of low price and convenient installation does not need the card or any other controller can be used in every grade of the computer but only as a result of increased in the framework of common screen emission in the process of using the frame around the tube and infrared receiving tube is easily damaged, and low resolution 2 capacitive touch screen Structure of capacitive touch screen is coated with a layer of transparent film layer on the glass screen, Add a piece of glass in the protective conductor layer, double glass design can completely protect the conductor layer and sensor capacitive touch screen touch screen on the electrode edges are plated on the narrow, formed on the conductive body of a low voltage AC electric field when the user touches the screen, because the human hand refers to the electric field, and the conductor layer can be formed between a a coupling capacitor, a four electrode current will flow to the contact, and the current strength and the finger to the electrode is proportional to the distance, the proportion and intensity in the touch screen controller will calculate the current, accurately calculate the touch point position of double glass capacitive touch screen can not only protect the conductor and the sensor, effectively prevent external the environmental factors impact on the touch screen, the screen even if the piles of dirty dust or grease, capacitive touch screen that can accurately calculate the touch location 3 resistive touch screen The screen body part of touch screen is a multilayer film and the surface of the display is very complex, which consists of a layer of glass or organic glass is used as the base, the surface coated with a layer of transparent conductive layer (OTI, indium oxide), which is covered with a layer of outer surface hardened smooth scratch resistant plastic layer, inner surface it is also coated with a layer of OTI, there are many tiny between two layers of conductive layer (less than 1/1000 inches) of the transparent isolation points separated them insulation when the fingers touch screen, two conductive layer OTI a contact point, because one side of the conductive layer on the Y axis direction 5V uniform voltage field, the voltage detection layer changes from zero to zero, the switch on the controller to detect, A/D conversion, and then the voltage value is compared with the 5V, you can touch the Y axis point, in that position on the X axis, which is resistance. The most common touch screen operation principle according to the number of lead wire resistance screen, divided into four lines and five lines of multi wire resistive touch screen five wire resistive touch screen A conductive glass instead of conductive coating process, prolong the service life of the conductive glass can be improved greatly, and can improve the OTI coating the light transmittance of the resistive touch screen is thin and brittle fracture, the coating is too thick, will reduce the transparency and reduce the formation of internal reflection definition, OTI is more of a thin layer of plastic protective layer, but still easy to be damaged by sharp objects; and because often be touched, the surface of OTI after using for some time the emergence of small cracks, even if one of the variants, the outer OTI damage and fracture, will lose as a conductor, but not a long life of the touch screen resistive touch screen from dust dirt water effect 4 surface acoustic wave touch screen Surface acoustic wave touch screen touch screen can be part of a flat glass plate is spherical or cylindrical, installed in the CRTLEDLCD or in front of the glass plate plasma display screen is a piece of pure glass, different from other touch screen technology is no ultrasonic posted film and covering the upper left corner of the glass screen and the lower right corner of the fixed vertical and horizontal direction transducer, the upper right corner of the fixed four surrounding two corresponding ultrasonic transducer glass screen is engraved with the angle of 45 degrees from sparse to dense interval reflected very sophisticated stripes the transducer controller into acoustic energy transfer to the left through the touch surface of telecommunications number of screen cable sent, Then by a group of precision glass plate below the reflection fringes reflected into acoustic energy transfer to the uniform surface, acoustic energy through the screen surface, the reflective stripes above into the right line to the X- axis of the receiving transducer, surface acoustic wave energy receiving transducer will return the transmitted signal and the received signal waveform in the absence of touch into electrical signals when the signal waveform and the reference waveform exactly the same when the fingers or other objects or block the absorption of acoustic energy touch screen, X axis via finger to acoustic energy walking was partially absorbed in the reaction on the received waveform a position on a waveform the attenuation of the received waveform corresponding to the fingers off parts of Notch signal attenuation of a gap, calculate the gap position is the touch coordinates controller analyzes the received signal and to decay From the gap to judge the position of X after the same Y axis coordinate to determine the coordinates of the touch Y in addition to XY coordinate, touch screen can respond to external surface acoustic wave touch screen also in response to the third axis Z axis, is aware of the user touches the pressure value of three axis once identified, the controller will take them transfer to the host surface acoustic wave touch screen is not affected by temperature humidity and other environmental factors, high resolution, has an excellent scratch resistant, long service life (50 million no fault); high transmittance (92%), the image quality can keep clear and transparent; do not drift, but the most suitable for use in surface induction converter induction system long time operation of public places, will be generated by the acoustic pressure and the damage of general wool or leather gloves will receive part of the sound induction accuracy is also affected the screen surface Or a finger touching the screen, such as water stains grease stained with dirt or dust, will also affect its performance, even make the system to stop operation. [editor this paragraph] appearance classification Slide touch screen mobile phone For example, Samsung 8300, B5702 belonged to sliding mobile phone category, but can not use it to screen and keyboard operation. This will slide and combines the advantages of touch screen. Sliding cover mobile phone For example, NOKIA N97, Sony Ericsson X1 will use this form. Can be used at the same time as computer keyboard. Flip the touch screen mobile phone For example, Motorola A1800, Samsung W629 count. We use this form. This design can use mobile phone sets, mobile phone screen protection. Straight touch screen mobile phone Many of the domestic mobile phone, such as Lenovo Mobile phone design using the keyboard and touch screen. The equivalent of the improved screen and keyboard unchanged. Multi point touch screen technology [edit this paragraph] That can be operated at the same time on the screen with more than one finger, can zoom can do to amplify the action with two fingers, at the same time for the common touch screen is a touch screen mobile phone hard just can touch technology. The earliest use of the technology of the mobile phone is now Iphone, Samsung, LG, Motorola and other major brands are using this technology. [editor this paragraph] touch sensing technology The touch sensing controller currently provides some general performance options and forms, such as slides and proximity sensor. The touch sensor technology makes the sensor driven interface is easy to implement, the end user is more intuitive and simple. The capacitance change most touch sensing controller on the basis of the detected work. When the conductive metal chips something or someone close to or touch sensor, capacitance between the fingers and the metal sheet changes. Conductive objects (such as finger) moving in the vicinity of the sensor will change the electric field line capacitance sensor and capacitance change. The control circuit can detect the capacitance change. The touch sensor interface circuit usually through the impedance measurement and sensor pad connected to detect the change in capacitance. The impedance controller periodically measuring sensor input channel and use these values to derive an internal reference, namely impedance calibration. The impedance value based controller to determine whether the touch occurred. [editor this paragraph] touch screen mobile phone brand NOKIA: 5800XM, 5802xm.N97, n97i, 55305230, n875530: I908, i8910, Samsung M8000, S5230 S1, Touch HD, Dopod P800, Motorola Touch Pro: A1800, A3100, Sony Ericsson, Satio, X1: M8: iPhone: Apple Meizu