advisory:
Hello, I bought your machine, I feel that the buttons are not sensitive, and I don’t have the touch screen of my mobile phone.
Professional answer:
Yes, you bought our resistive touch screen cash register. The phone and tablet are basically capacitive screens. Their characteristics are different.
Let's first talk about what is a capacitive screen and its capacitive screen features.
Capacitive touch screen technology uses the current sensing of the human body to work.
Capacitor bottle advantages
Capacitive touch screens only require touch and do not require pressure to generate a signal. So feel sensitive
Capacitive touch screens require only one or no correction after production, while resistor technology requires routine correction.
Capacitor bottle disadvantage
The capacitive screen is heavily reflective, and the image is blurred due to the reflection of light between the layers.
Current: The capacitive screen is used in principle as an electrode of a capacitor component. When a conductor is coupled to a capacitor with a sufficient amount of capacitance between the working surface of the ITO and the interlayer, the current flowing away is sufficient to cause the capacitive screen. Malfunction.
High environmental requirements: mobile phones and tablets are all powered by rechargeable batteries, that is, direct current. However, as a cash register, it is plugged in, that is, alternating current. If the voltage is unstable, there is a problem with the power supply, such as the power supply has no ground wire, etc. The touch screen Will fail
Drift: The main disadvantage of the capacitive screen is drift: when the ambient temperature and humidity change, the environmental electric field changes, causing the drift of the capacitive screen, resulting in inaccuracy. For example, if the temperature of the display rises after power on, it will cause drift: when the user touches the screen, the other hand or the side of the body will drift near the display; the larger object near the capacitive touch screen will drift after being moved, and if the user touches it, if someone touches it It also causes drift; the drift of the capacitive screen is a technical deficiency.
Let us talk about what is the resistance screen and the characteristics of its resistance screen.
The resistive touch screen is a kind of sensor. When the touch operation is performed, it is sent to the processor through the conversion circuit, and is converted into the X and Y values ​​on the screen by the operation, and the selected action is completed and presented on the screen.
Moisture protection: Moisture, especially damp heat and the environment can cause touch failure (after a period of use). For example, the noodle restaurant is close to the noodle pot, and the buns are placed close to the steamer's large steam.
Resistance screen advantages
Resistive touch screens are highly accurate and can be at the pixel level.
The screen is immune to dust, moisture and oil and can be used in lower or higher temperature environments.
The resistive touch screen uses pressure sensing and can be touched with any object, even with gloves, and can be used for handwriting recognition. In particular, you will find that most cashiers are used to clicking with their nails.
Resistance screen defect
Multi-touch is not ideal and the error rate is high.
Feel less sensitive than a capacitive touch screen (for reasons written above)
The resistive touch screen is afraid of scratches on the screen due to scratches on hard objects.
In summary, the environment of the touch screen cash registers is generally semi-outdoor, and the cash register operation does not require multi-touch and swipe. Therefore, most of them use resistive screens. At present, some cash registers assembled by tablet computers are Capacitive screen. There is no way. After all, the manufacturers that use this kind of touch screen cash registers are not professional, most of them are software vendors, and there is no technology development capability.
advisory:
Oh, understand. So what kind of touch screen do the McDonald's, KFC, Starbucks and other famous chain stores use?
Professional answer:
McDonald's uses the US PAR touch screen cash register, does not contain the cash box and printer, the price is about 2W yuan, resistance screen
KFC's minority use NCR, most of them use IBM's touch screen cash register, without cash box and printer, the price is about 1.4-1.6 million, resistance screen
Starbucks uses the MICROS touch screen cash register, which is actually a Taiwanese partner, with a price of 1.2-1.4 million, or a resistive screen.
advisory:
It turns out that it is long.
Professional answer:
Yes, the first thing to buy a touch screen cash register is safe, stable and fast.
Safe and stable, it is both structural and touch. Embedded structure + resistive screen will be safe.
Fast is not a sensitive problem with touch buttons. It is a problem of realizing a sales operation and how many buttons. The fewer the keys, the faster. This is a programming problem.
advisory:
I think so too.
Professional answer:
In addition, you see the touch screen cash register of the capacitive screen, which is basically modified by the tablet. This is also one of the important signs! !
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