Industrial touch screen by the touch detection components and touch screen controller; touch detection components installed in front of the monitor screen, used to detect the user's touch location, acceptance of the touch screen controller; and the main role of the touch screen controller is to receive touch information from the touch point detection device, and convert it into contact coordinates, and then sent to the CPU, which at the same time can receive commands sent by the CPU and to be implemented. It gives the multimedia to a new look, is very attractive new multimedia interactive equipment.
Touch screen , also known as the "touch screen", "touch panel", is an inductive liquid crystal display device that can receive input signals such as touch, when in contact with the graphic buttons on the screen, the tactile feedback system on the screen may be According to the pre-programmed program to drive a variety of connectivity devices, can be used to replace the mechanical button panel, and through the LCD screen to create a vivid audio-visual effects.
Mainly used in public information query, leadership office, industrial control, military command, electronic games, ordering food, multimedia teaching and education, real estate pre-sale, and so on.
Industrial touch screen common 6 kinds of classification and good characteristics
1, four-wire resistive touch screen
Four-wire resistive touch screen is one of the most widely used and popular in the resistive family, it is a resistive screen that is not afraid of dust, oil and photoelectric interference.
Working principle: analog technology of two layers of transparent metal layer, the work of each layer of an average increase of 5V constant voltage: a vertical direction, a horizontal party, a total of four cables are required.
Excellent characteristics: with a calibration, high stability, never drift excellent characteristics, suitable for fixed users in public places, such as industrial control site, self-service terminals.
2, five-wire resistance touch screen
Working principle: we can understand that the two sides of the voltage field sub-time work frame on the same work surface, but the outer conductive layer will only be used as a pure conductor, there is a touch, respectively, will detect the inner ITO contact point, and the Y-axis voltage value of the method to measure the location of the touch point, it's the inner ITO needs four leads, the outer layer only needs a day can be, the touch-screen lead line there are five!
Excellent characteristics: not afraid of dust and water vapor, five-wire resistive service life is much longer than the four-wire type. It can be touched with any object, can be used to write and draw, more suitable for industrial control areas and offices with a limited number of people to use!
3, eight-wire resistive touch screen
Principle of operation: eight-wire resistive touch screen is based on four-wire resistive generated, it is in the four-wire type of each lead line and add a reference lead line, so that the number of lead lines doubled to eight. The four additional lead wires are auxiliary lead wires. Their function is to read the actual voltage generated by the drive voltage so that the eight-wire resistive controller can automatically correct for drift.
Excellent feature: can be limited to avoid the drift caused by long time use or environmental factors.
4, Surface Acoustic Wave Touch Panel
Surface acoustic wave touch screen is one of the fastest reaction speed of all touch screen LCD screen, it can accurately determine what is dust, water droplets, what is the finger, how many in the touch.
Working principle: many professionals engaged in the touch screen industry know that the resistance touch screen has a disadvantage is very low light transmission, acoustic wave touch screen is specialized in solving this pain point. Surface acoustic wave touch screen work surface is a layer of invisible, not bad acoustic energy, when the screen is touched, ultrasonic waves are absorbed by the finger or other objects and produce attenuation. The location can be determined by detecting these changes. Of course, the user does not feel this vibration when the screen is touched.
Excellent characteristics: These panels are highly easy to use and also have excellent characteristics such as high visibility, high brightness, and storm resistance. It is more suitable for cleaner environments and also requires regular cleaning services.
5, infrared sensor touch screen
When you use the infrared touch screen, you do not need to use too much force, just need you to gently point to be able to realize the operation, whether it is the use of fingers, stylus, pencil and some other foreign objects can be realized operation.
Excellent characteristics: has a high degree of stability, will not drift like capacitive screen, and will not occur with time or the environment of any operational changes. It has a high adaptability, when there is static electricity, electric current or sand, fog in the weather can be stable point of use. It has 100% light transmission and does not cause any change in brightness. This touch screen has a long service life, not afraid of scratching the screen surface, can be used for a long time without worrying about the failure of the touch effect!
6, capacitive touch screen
Working principle: when we use our fingers to touch the surface of the screen, there will be a certain amount of charge transferred to the human body above, in order to recover these charges we can be charged from the four corners of the screen, for each direction of the amount of charging in the distance from the point of contact is proportional to the time, so that we can deduce the point of contact in which direction.