מסך התנגדות: גוף המסך של מסך המגע ההתנגדות הוא סרט מרוכב רב שכבתי, עם שכבת זכוכית או פרספקס כשכבת הבסיס, מצופה בשכבה מוליכה שקופה (ITO, סרט), ומכוסה בשכבה של משטח חיצוני הוקשחה, חלקה ועמידה בפני שריטות-. המשטח הפנימי שלו מצופה גם בשכבה של ITO, ויש הרבה נקודות בידוד קטנות (פחות מאלפית אינץ') שקופות בין שתי השכבות המוליכות כדי להפריד ביניהן. כאשר האצבע נוגעת במסך, שתי השכבות של ITO באות במגע וההתנגדות משתנה. הבקר מחשב את הקואורדינטות של נקודת המגע לפי שינויי ההתנגדות שזוהו, ולאחר מכן מבצע את הפעולות המתאימות לפי הקואורדינטות. לכן, טכנולוגיה זו חייבת להפעיל כוח. כדי לקבל את אפקט המגע על המסך.
Capacitive screen: The capacitive touch screen uses the current induction of the human body to work, and its touch screen is composed of a four-layer composite glass screen. When a finger touches the touch screen, due to the electric field of the human body, the user and the surface of the touch screen form a coupling capacitor. For high-frequency current, the capacitor is a direct conductor, so the finger draws a small current from the contact point. This current flows from the electrodes on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller obtains the position information of the touch point by accurately calculating the proportions of these four currents. .
From the principle of the resistive screen and the capacitive screen, it can be seen that the capacitive touch screen only needs to be touched, and does not need pressure to generate a signal. Capacitive touch screens require only one or no calibration after production, while resistive technology requires conventional calibration. The life of the capacitive solution will be longer, because the components in the capacitive touch screen do not require any movement. In resistive touch screens, the upper ITO film needs to be thin enough to be flexible so that it can bend downward to contact the lower ITO film.
A few simple ways to distinguish the capacitive screen of the resistive screen is ready to come out.
1. Look
Indoors, whether it is a resistive screen or a capacitive screen, the visual effects of both are very good. But if you put it in the sun, the effect can be quite different. Resistive screen performance will be unsatisfactory, because its extra screen layer reflects a lot of sunlight. For example, the classic mobile phones of Motorola's "Ming" series are usually very poorly visible to the naked eye when placed in the sun.
2. Touch
The resistive touch screen requires pressure to make contact with each layer of the screen, and can be operated with fingers, stylus, etc. Capacitive touch screens can also activate the capacitive sensing system below the screen by the slightest contact on the surface of a charged finger. Non-biological bodies, nails, etc. are invalid.
3. Experience
The fundamental characteristics of the resistive screen determine that its top is soft and needs to be able to be pressed down, which makes the screen very prone to scratches. However, since the resistive screen can be operated with a stylus or nails, it is good for the cleanliness of the screen. The outer layer of the capacitive screen can use glass. Although it is not indestructible, it may shatter under severe impact, but the glass is easier to deal with daily bumps and stains.
4. Purchase cost
The cost of the resistive screen is relatively low, and the cost of the capacitive screen is relatively high. This is one of the main reasons why (excluding software interference) the price of domestic tablets is lower than Apple's iPad.
