Multi-touch screen purchase knowledge:
When you get a multi-touch screen, check whether there is a green border printed around the touch screen. If there is, you can probably guess that it is insulating ink, but the insulating ink may also be a translucent color.
In any case, the design using insulating ink will be slightly inferior to the quality of the double-sided tape with base material. In addition, you can take a look at the design of the wire end. If the connection between the outlet tail and the touch screen itself is not strong enough, the touch screen is easily broken. If the touch screen is broken, there is little chance of repairing it.
In addition, you can hold the touch screen in your hand and use a 60° angle to see if there are Newton rings on the surface. If there is a touch screen produced by Newton rings, it means that the factory has insufficient experience in dealing with Newton rings. Touch the touch screen with your finger to see if the touch screen has upper and lower layers. If you feel it, it means that this factory has a way to go to provide a good quality touch screen product.
When purchasing a multi-touch screen, we might as well learn more about multi-touch screen knowledge. In order to realize the multi-touch function, the multi-touch screen and the single-point touch screen adopt a completely different structure. From the outside of the screen, the single-point touch screen has only a few signal lines (usually 4Pin or 5Pin), while the multi-touch screen has many leads; from the inside, the conductive layer of the single-point touch screen is just a flat panel, and multiple The touch screen is divided into many relatively independent touch units on the tablet, and each touch unit is connected to an external circuit through an independent lead, and all the touch units are arranged in a matrix on the board. In this way, when the user's finger touches a certain part on the screen, a signal will be output from the corresponding detection line. When the finger moves to another part, the signal will be output from another detection line.
