Which One Do You Prefer, Resistive Touch Screen Or Capacitive Touch Screen?

The difference between capacitive touch screen and resistive touch screen is mainly reflected in touch sensitivity, accuracy, cost, multi-touch feasibility, damage resistance, cleanliness, and visual effects in the sun

One: Touch sensitivity

1. Resistive touch screen: pressure is required to make all layers of the screen contact. It can be operated with fingers (even gloves), nails, stylus, etc. In the Asian market, the support of the stylus is very important, and the gesture and character recognition department is valued.

2. Capacitive touch screen: The slightest contact with the surface of a charged finger can also activate the capacitive sensing system at the bottom of the screen. Non-living body, nails, gloves are invalid. Handwriting recognition is difficult

Two: accurate

1. Resistive touch screen Capacitive touch screen: The theoretical accuracy can reach a few pixels, but in fact it is limited by the contact area of the finger. Therefore, it is difficult for users to accurately click on targets below 1cm2

Resistive touch screen: very low cost

2. Capacitive touch screen: The price of capacitive touch screens from different manufacturers is 10%-50% higher than that of resistive touch screens. This additional cost is not important for flagship products, but it may discourage mid-priced phones

Resistive touch screen

Capacitive touch screen: It depends on the implementation method and software. It has been implemented in G1 technology demonstration and iPhone. The 1.7t version of G1 can realize the browser

Multi-touch function of resistive touch screen: The basic characteristics of resistive touch screen determine that its top is relatively soft and needs to be pressed. This makes the screen very easy to scratch. Resistive screens require a protective film and relatively frequent calibration. The advantage is that the resistive touch screen device with plastic layer is not easy to be damaged, and it is not easy to be damaged.

Capacitive touch screen: The outer layer can be made of glass. In this way, although the glass is not indestructible and may break under severe impact, it is best to deal with daily friction and stains.

Resistive LCD screen

Three: Clean

1. Resistive touch screen: because it can be operated with a stylus or nails, it is not easy to leave fingerprints, and there are oil stains and bacteria on the screen

2. Capacitive touch screen: touch with the whole finger, but the outer glass is easier to clean

Environmental suitability

1. Resistive touch screen: The specific value is unknown. However, there is evidence that the Nokia 5800 with resistive screen can work at a temperature of -15°C to 45°C, and there is no requirement for humidity

2. Capacitive touch screen

Resistive touch screen: usually very poor, the extra screen layer will reflect a lot of sunlight

The capacitive touch screen works by human body current induction. The capacitive touch screen is a four-layer composite glass screen. The inner surface and interlayer of the glass screen are coated with ITO (coated conductive glass), and the outermost layer is a thin protective layer of quartz glass. The working surface is coated with indium tin oxide, and four electrodes are drawn from four corners. The inner layer of ITO is used as a shielding layer to ensure a good working environment when the finger touches the metal layer.

The electric field of the human body, the user, and the surface of the touch screen form a coupling capacitor. For high-frequency currents, the capacitor is a direct conductor, so the finger absorbs a small amount of current from the contact point. Current flows from the electrodes at the four corners of the touch screen, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The controller compares the four current ratios

Capacitive screens are now used a bit more, because it has the advantages of accurate point location and easy support for multi-touch. But at the same time it is very delicate and needs good care.