As an input device, the touch screen has the advantages of easy to use, ruggedness, fast response time, and space saving, and the user can use it directly through the contact screen to complete the operation, without the need for a keyboard or mouse, and is very practical and widely used.
The quality requirements of the touch screen are verified by testing, and the reliability test must be carried out in production, and the primary test items include high and low temperature preservation, cold and hot shock preservation, dotting test, marking test, surface hardness, surface static pressure test, packaging sensation, packaging fall, steel ball impact test, etc. In the contact screen test, there is a large demand for current transmission, and the high-current shrapnel microneedle module can be used for connection and conduction, first, it can transmit up to 50A of current and maintain a stable connection; Second, it will not cause puncture marks to the connector, and has a service life of more than 20w times; Third, it can cope with the messy test environment, and can effectively improve the efficiency of the test without needle and non-pinning.
The primary elements of a touch screen are a sensor unit that processes the user's choice, a controller that senses and localizes the contact, and a software driver that transmits the contact signal to the operating system. These three types of components constitute the operating mechanism of the contact screen. In addition to the components, there are also several skill types such as capacitive contact screen, resistive contact screen, infrared contact screen, surface acoustic wave contact screen and near-field imaging contact screen.
The capacitive touch screen is coated with a transparent conductive layer ITO, the voltage is connected to the four corners, and the small DC dispersion part is on the surface of the screen to form a uniform electric field. Because it only needs to sense the current of the human body to make a corresponding response.
The resistive touch screen is composed of a display screen and a resistive thin film screen, and the resistive thin film screen is divided into two layers, one is based on glass, and the surface is coated with a bright conductive layer; Outside the base layer is the same plastic layer with a conductive layer. Whenever the screen is pressed or touched, the conductive layers will touch each other and form a contact signal to complete the operation.
The infrared touch screen is based on the abort skill of light, and an outer frame is set around the display, with a light source or LED on one side of the outer frame, and a light detector or photoelectric sensor on the other side, and the two ends correspond to form an interspersed infrared network. Whenever an object touches the display, the infrared rays are blocked, so that the position of the contact point on the screen can be determined.
A sonic touch screen is a sensor mounted on the edge of a glass screen to send ultrasonic signals. Ultrasonic waves are reflected through the screen and are subjected to by the sensor. The external sound wave signal is to convert the surface sound wave energy formed by the convergence of reflected fringes into an electrical signal; The Guided Sonic skill converts the electrical signal sent by the controller through the screen cable into sonic energy
The near-field imaging touch screen is composed of two thin glass layers, and when an AC signal is applied to the conductive layer, an electric field will occur on the surface of the screen, and when the sensor is touched with a finger or a conductive pen, the electric field will be disturbed, and the screen can get the signal.
Among these types of touch screen skills, the resistive contact screen can only distinguish one control point during operation, and it is impossible to make correct judgment beyond one, which is not applicable to multi-functional mobile phones and tablets, and is only suitable for the discrimination of simple actions such as clicking and dragging. The technical limitations of the IR contact screen due to its low resolution, limited touch methods, susceptibility to environmental interference and sensitivity to lighting environmental factors make the IR contact screen less popular in the market. Once the surface of the screen is contaminated with dust, oil or liquid, the waveguide groove on the surface of the contact screen will be blocked, so that the waves cannot be emitted and identified normally, and then the contact screen cannot be used normally.
The capacitive touch screen has high durability, dustproof, waterproof, wear-resistant characteristics, and its multi-touch function can decompose the user's contact actions and complete the judgment of messy actions, so it is very ideal for mobile phones, tablets of contact screens.
|
More on that
|
Hitec touch screen decompilation method
1. The small switch at the back of the touch screen, DIP5, 6off, can enter the system catalog of the touch screen.
2. Select the download/UP load copy port of the man-machine as com1, and go to configure to select.
...
|
|
The principle and function of the touch screen - Hitech
function
For the convenience of operation, people use the touch screen instead of the mouse or keyboard, the touch screen is a smart device that can display and communicate with the PLC, and also has memory and programming capabilities. We can pass ...
|
|
Touch screen knowledge and testing solutions – Hitech
As an input device, the touch screen has the advantages of easy to use, ruggedness, fast response time, and space saving, and the user can use it directly through the contact screen to complete the operation, without the need for a keyboard or mouse, and is very practical and widely used.
...
|
|
Industrial touch panel PC for dismantling and screen replacement - Hitec
In the use of industrial tablet computers, in many cases, there will always be some accidental situations, and it is likely that it will be necessary to disassemble and replace the screen before it can be processed.
1. Strong ...
|
|
Which is more advantageous, resistive touch screen or capacitive touch screen
The contact screen of mobile phone capacitive contact screen and resistance contact screen are mainly different in contact sensitivity, accuracy, cost, multi-point contact feasibility, damage resistance, cleaning, and sunlight visibility.
Contact sensitivity, 1 ...
|
|
Hitec touch screen daily simple maintenance tips
1. In the daily use of the equipment, try to prevent frequent power off and off, and sudden power failure during operation will cause certain damage to electronic components and hard disk errors; In terms of power supply, keep operating in a stable voltage environment, too low voltage, too high voltage will affect the function of the equipment, and will also ...
|
|
Guidelines for designing industrial touch screens – Hitech
The industrial touch screen is an intelligent interface that connects people and machines through touch industrial displays. It is an intelligent operation display terminal that replaces the traditional control buttons and indicator lights. It can be used to set parameters, display data, monitor equipment conditions, draw curves/animations, etc.
|
|
Four-wire/five-wire resistive touch screen – Hitech
The two-layer transparent metal layer of the four-wire resistance analogue technology operates with a constant voltage of 5V on each layer: one vertically and one horizontally. A total of four cables are required. High-resolution, high-speed transmission response. Surface hardness treatment to reduce abrasions, scratches and chemical resistance. With light ...
|
|
Design and implementation of touch screen drivers – Hitech
Embedded device contact screens can be divided into five categories according to their technical principles: vector pressure sensing, resistive, capacitive, infrared, and surface acoustic waves. Among them, resistive contact screens are used more in embedded systems, and resistive contact screens can be divided into four wires, five wires, seven wires and so on. So so...
|
|
The reason for choosing a vision system is Hitech
The visual system is a rising star in industrial automation, and the demand for work efficiency in modern industrial automation is constantly improving, and the traditional form of manual detection has been unable to meet the needs of production. The presentation of the machine vision system is a good replacement for the cumbersome traditional manual labor, which is suitable for ...
|
|
Key points for the use of industrial control touch screen all-in-one machine - Hitec
Storage humidity between 10%-90% Temperature -20°C-60°C If the ambient conditions exceed or approach the critical value, condensation will occur inside the display. The power transformer and other coils inside are also prone to leakage when wet, and may even cause a short circuit in the wiring. If you find that the obvious ...
|
|
Introduction to common sense of human-machine interface - Hitec touch screen
1. What is the difference between the human-machine interface and the "touch screen" that people often say?
Strictly speaking, the two are fundamentally different. Since the "touch screen" is only a hardware part that may be used in human-machine interface products, it is a replacement for the mouse and keyboard part of the function, the installation ...
|
|
HMI Faults and Solutions for Human-Machine Interfaces - Hitec
Human Machine Interaction (HMI), also known as user interface or user interface, is a preface and dialogue interface for transmitting and communicating information between humans and computers, and is an important part of computer systems. It is the interaction and information between the system and the user ...
|
|
The reason for the failure of industrial touch screens - Hitech
After clicking on the three corners of the contact screen, enter the offline form (note: different contact screens enter the offline form in different ways). Once in the offline format, click "INITIALIZE", and after clicking, keep clicking "SET-UP-I/O" and then "SET-UP-TOUCH-PANEL". ...
|
|
Precautions for man-machine interface touch screen all-in-one machine - Hitech
1. The touch screen part is a glass product, the glass corners are relatively sharp, and the assembly needs to be carried out with gloves/finger covers.
2. The touch screen part is a fragile glass product, and do not exert a strong impact on the touch screen during assembly.
3. Pick and place products ...
|
|
The driving principle of a capacitive touch screen
1. Projective capacitive contacts
Although the basic structure and working principle of the projected capacitive contact screen is the same as that of the four-wire impedance film, the projected capacitive impedance film does not pass through the contact field, but captures the change of capacitance between the electrodes. Generally speaking, when using the form of capacitive sensor, it can almost ...
|
|
Hitec touchscreen copy program
TWO HITECH TOUCH SCREEN COPY PROGRAM METHODS:
1. Make a communication cable first.
HMI1 COM port HMI2 COM port
25-pin female 25-pin female
RXD 3 -------------------------------- TXD 2
...
|
|
Hitec touch screen new and old models replacement selection
Hitec touch screen selection:
10.4" Series: PWS6A00T-N (True Color Network), PWS6A00T-P (True Color Enhanced), PWS6A00T-S (Color Basic)
7.5" Series: PWS6800C-N ...
|
|
The installation method of industrial-grade display - Hitech
Industrial-grade displays are displays that are used in industrial control links or equipment. The key difference between it and civilian or commercial displays is that the chassis planning is generally made of all-steel planning concepts, and the panel is divided into different materials such as iron plates, stainless iron, stainless steel, and aluminum panels. Industrial-grade display ...
|
|
Categories and Advantages and Disadvantages of Resistive Touch - Hitech
Resistance contact is divided into four-wire resistance and five-wire resistance contact, the simple difference is four wires and five wires in the functional area.
A constant voltage of 5V is added to each layer of the two-layer transparent metal layer with four-wire resistance analogue technology: ...
|
|
Contact
working hours
