With the continuous mainstreaming of touch screen mobile phones and tablet computers in recent years, the concept of touch screen has gradually gained popularity, but do you know? Our touch screen is divided into resistive screen and capacitive screen, then you know What is the difference between a resistive screen and a capacitive screen? What screen is your cell phone? Now let's see what is the difference between a capacitive screen and a resistive screen: Resistive touch screen ①They are a complete cut off from the outside world, not afraid of dust, water vapor and oil ② can touch with any object, can be used to write painting, which is their comparative advantage ③ resistive touch screen accuracy depends only on the accuracy of A / D conversion, which can easily reach 4096 * 4096? In comparison, the four-wire resistance than the four-wire resistance in the envelope resolution accuracy is even better, but the cost price, So the price is very high. (1) four-wire resistive screen Four-wire resistance imitation skills of the two layers of clear metal layer things are growing at 5V constant voltage: a vertical deflection, a degree of bias. Total required four cables. Features: high-profile, high-speed transmission response. External hardness treatment, eliminate abrasions, scratches and chemical treatment. With smooth and matte disposal. A calibration, high stability, never drift. (2) five-wire resistance screen Five-wire resistance touch the bottom of the touch screen to the two biased voltage field through the collection of fine resistance are added to the conductive glass side of the incident, we can easily understand the two biased voltage field events added to the unity of things, The outer layer of nickel gold conductive layer is only used only as a pure conductor, after touching the inner layer ITO touch points to detect the X-axis and Y-axis voltage value measured touch point status. Five-wire resistive touch screen inner ITO need four leads, the outer layer only as a conductor, the touch screen leads a total of five. Features: high profile, high-speed transmission response. High surface hardness, eliminate abrasions, scratches and chemical treatment. The same point to fight 30 million times can still be used. Conductive glass substrate for the media. A calibration, high stability, never drift. Five-wire resistive touch screen has a low price and high demand defects (3) the scope of the resistance screen Whether it is four-wire resistive touch screen or five-wire resistive touch screen, they are a complete cut off from the outside world, not afraid of dust and water vapor, it can touch with any object, can be used to write painting, more suitable for industrial control categories And unlimited use of the office. Resistive touch screen with the defect is due to the outer layer of composite film plastic materials, people do not know too hard or use sharp touch or scratches the entire touch screen and lead to scrapped. However, within the limits, scratches will only hurt the outer conductive layer, scratching the outer conductive layer is not related to the five-wire resistive touch screen, and four-wire resistive touch screen is deadly. 2, capacitive touch screen (1) capacitance skills touch screen Is the application of the body's current feel stopped. Capacitive touch screen is a four-layer composite glass screen, glass screen inside and outside the table and the interlayer coated with a layer of ITO, the outermost layer is a thin layer of silica glass maintenance layer, laminated ITO coating as a matter of fact, the four corners Lead to four electrodes, the inner layer of ITO as a barrier to ensure good things. When the finger touches the metal layer, the user and the touch screen form a coupling capacitor due to the human body electric field. As to the high-frequency current, the capacitor is an indirect conductor, and the finger sucks a small current from the point of contact. The current points out from the electrodes on the four corners of the touch screen, and the current flowing through the four electrodes is inversely proportional to the interval from the finger to the corners. After the controller has accurately calculated the proportions of the four currents, the position of the touch point . (2) Capacitive touch screen defects Capacitive touch screen transmittance and clarity better than the four-wire resistive screen, of course, can not be compared with the appearance of acoustic screen and five-wire resistive screen. Capacitive screen reflective tension, and capacitance of the four-layer composite touch screen light transmittance of light at different wavelengths, there is the problem of color distortion, because the reflection of light in the layers, but also the formation of fuzzy image characters. Capacitive screen in the sense of the human body as a capacitor element of an electrode use, when there is a conductive conductor near the mezzanine ITO surface coupling between a sufficient amount of capacitance, the flow of current sufficient to cause capacitive screen error action . We know that, although the capacitance is proportional to the gap between the poles, but inversely proportional to the absolute area, but also with the dielectric constant of the medium. Thus, when a larger area of ​​the palm or hand-held conductor close to the capacitive screen rather than touch can cause capacitive screen error action, in a humid climate, the situation is particularly tense, hold the display device, palm close to the display 7 cm or less than the body within 15 cm of the display can cause capacitive screen error action. Another disadvantage of the capacitive screen is that there is no reaction when touched with a gloved hand or a hand-held non-conductive object due to the growth of a more insulating medium. Capacitive screen more important flaw is the drift: When the situation temperature, humidity changes, the situation changes in the electric field attack, the city caused the capacitive screen drift, the formation of the ban is not accurate. For example: the temperature rise of the display will cause a drift when the power is turned on: the user touches the screen while the other hand or body side approaches the display and may drift; the larger the left and the right of the capacitive touch screen move, The appearance of the capacitive touch screen also causes drift. The drift edge of the capacitive screen belongs to a lack of talents in skills. Although the potential surface (including the user's body) is far away from the capacitive touch screen but larger than the area of ​​the finger, they indirectly affect the touch Determination of status. In addition, in fact, many of the linear relationship should be non-linear practice, such as: body weight difference between finger wet level differences in the total amount of current drawn away is different, while the total amount of current changes and the four sub-current Change the black and white linear relationship, capacitive touch screen application of the four corners of the self-definition polar coordinate system has no coordinates on the origin, the controller can not be found after drift and recovery, and, after the completion of 4 A / D by The value of the four sub-flows to the touch point in Cartesian coordinates of the X, Y coordinates Beach Flag,Garden Flag,National Flag,Hand Waving Flag SHAOXING CHUANGDONG TOUR ARTICLES CO.,LTD , https://www.flagnshow.com