Which Is More Advantageous, Resistive Touch Screen Or Capacitive Touch Screen?

There are differences between capacitive touch screens and resistive touch screens in terms of touch sensitivity, accuracy, cost, feasibility of multi touch, resistance to damage, cleanliness, and visual effects in sunlight.
(1) Touch sensitivity
1. Resistance touch screen: Pressure is required to make contact between the various layers of the screen, which can be operated using fingers (even with gloves), nails, stylus, etc. Support for stylus is important in the market, and gesture and text recognition are valued everywhere.
2. Capacitive touch screen: Fine contact from the surface of charged fingers can also activate the capacitive sensing system below the screen. Non living objects, nails, and gloves are ineffective. Handwriting recognition is difficult.
(2) Accuracy
1. Resistance touch screen: The accuracy should reach at least a single display pixel, which can be seen when using a stylus. It is convenient for handwriting recognition and is helpful for operation under the interface of using small control elements.
2. Capacitive touch screen: The theoretical accuracy can reach several pixels, but in reality it is limited by the contact area of the fingers. So much so that users find it difficult to click on targets smaller than 1cm2.
(3) Cost
1. Resistance touch screen: very affordable.
2. Capacitive touch screen: Capacitive screens from different manufacturers are 10% to 50% more expensive than resistive screens. This additional cost does not matter for flagship products, but may deter mid priced phones.
(4) Multi touch feasibility
1. Resistance touch screen: Impossible unless the resistance screen is reconnected to the machine's circuit.
2. Capacitive touch screen: Depending on the implementation method and software, it has been demonstrated in G1 technology and implemented on iPhone. The 1.7T version of G1 can already achieve the multi touch feature of the browser.
(5) Resistance to damage
1. Resistance touch screen: The fundamental characteristic of a resistance screen determines that its top is soft and needs to be able to be pressed down. This makes the screen very prone to scratches. Resistance screens require protective film and relatively frequent calibration. The advantageous aspect is that resistive touch screen devices using plastic layers are generally less prone to damage and damage.
2. Capacitive touch screen: The outer layer can be made of glass. Although this may not be indestructible and may shatter under severe impact, the glass should cope with daily scratches and stains.
(6) Cleaning
1. Resistance touch screen: Due to the ability to use a stylus or nail for operation, it is less likely to leave fingerprints or oil stains on the screen.
2. Capacitive touch screen: It needs to be touched with the entire finger, but the outer layer of glass is easier to clean.
(7) Environmental adaptability
1. Resistance touch screen: The specific value is unknown. However, there is evidence to suggest that the Nokia 5800, which uses a resistive screen, can operate normally at temperatures ranging from -15 ° C to+45 ° C without any humidity requirements.
2. Capacitive touch screen: The typical operating temperature is between 0 ° C and 35 ° C, requiring at least 5% humidity (limited by the operating principle).
(8) Visual effect under sunlight
1. Resistive touch screen: Usually very poor, with additional screen layers reflecting a lot of sunlight.
2. The capacitive touch screen utilizes the human body's current sensing for operation. The capacitive touch screen is a four layer composite glass screen, with an ITO (coated conductive glass) coating on the inner surface and interlayer respectively. The outer layer is a thin protective layer of silica glass, with the ITO coating as the working surface, four electrodes leading out from the four corners, and the inner ITO as the shielding layer to ensure a good working environment.
When a finger touches a metal layer, a coupling capacitor is formed between the human electric field, the user, and the touch screen surface. For high-frequency currents, the capacitor is a direct conductor, so the finger absorbs a small amount of current from the contact point. This current flows out 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 fingers to the four corners. The controller calculates the position information of the touch points by calculating the proportion of these four currents.
For now, more capacitive screens are used, because their point position makes it easier to support multi-touch and other advantages. But at the same time, it is also quite delicate, so everyone needs to take good care of it and take good care of it.