Description
PM902F Power Supply Module
PM902F Power Supply Module
Module Clips Drive controller servo moto
PM902F Power Supply ModuleSuitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation, gas supply, and other glass manufacturing, paper mills, mechanical manufacturing, electronic manufacturing, automotive manufacturing, aviation manufacturing, chemical manufacturing, coal mining and selection, oil and natural gas mining and selection, metal mining and selection, and non-metallic mining and selection
What is a resistive touch screen? and technical discussions about it
A resistive touch screen is a sensor that converts the physical location of a touch point (X,Y) in a rectangular area into a voltage representing the X and Y
coordinates . Many LCD modules use resistive touch screens, which can use four, five, seven or eight wires to generate screen bias voltage and read back the
voltage of the touch point. The touch screen is structurally composed of an inductive liquid crystal display device.
This inductive display can receive signals from the touch head or other touch actions.
When the sensor display receives a touch signal, the entire touch device will execute different instructions according to the pre-written program to realize the
user”s touch intention. This technology replaces the traditional mechanical button device, and with the addition of an LCD screen, it
can provide a very vivid picture and operational enjoyment, and is welcomed by more and more people. [1] Touch screen technology first appeared in some
industrial and commercial equipment, such as POS terminals, elevator buttons, etc. Touch screen technology facilitates human-computer interaction to
a great extent, and the touch screen itself is very sturdy and durable. These characteristics have allowed touch screen technology to
have great application and development. Using touch screen technology, users only need to click on the corresponding touch pattern with their fingers to
solve the complicated operation problems in the past, which greatly facilitates users.
The launch of iPhone in recent years has stimulated the development of touch screen related industries, and touch screen technology has been applied to
different products. With the rapid development of mobile Internet, cloud computing and other technologies, people”s demands and requirements for touch screen
technology are also increasing day by day. It is believed that touch screen technology will increasingly appear in different electronic products. In addition, touch screens
also have a lot of room for development in the automotive electronics and retail industries. According to relevant authoritative surveys, by 2012, the touch screen market for
automotive electronics and retail industries will reach 2 billion US dollars, accounting for the total touch screen industry. 20% of the market. At the same time, in the PC industry
, due to the continuous development of Microsoft operating systems, touch screen technology will also play a very important role. In addition, in the medical field, public facilities and
other fields, touch screen control technology will be further popularized and has excellent market expectation.
China”s touch screen consumer market has great potential, especially in the digital electronic product market. However, in the touch screen industry,
China”s touch screen industry is mainly concentrated in the middle and lower reaches of the industrial chain. Currently, a mobile phone manufacturing
center has been established in Shenbei New District of Shenyang, Liaoning Province. , attracting mobile phone touch screen manufacturers including
Chenxun Technology. On the one hand, it reflects the strong market for mobile phone touch screens; on the other hand, it reflects that the technical content of
my country”s touch screen industry is relatively low, and most of it is based on processing and OEM. However, in the touch screen industry chain, the touch
screen driver chip is the core and determines the quality of touch screen products. Major chip design companies around the world are also committed to
developing high-precision, low-power touch screen driver chips.
Resistive touch screen is a new type of touch technology, which has been widely used in consumer electronics products due to its unique advantages.
This article will introduce its principles and applications so that readers can better understand this new touch technology.
1. Principle of resistive touch screen
1 Introduction
It is a touch technology that forms a resistive closed circuit between the touch surface and the driving surface, and uses the resistance change generated
when the fingernail touches the surface to obtain the coordinates of the touch point.
2. Working principle
When the fingertip touches the screen, due to the contact of the fingertip, a resistive closed circuit is generated at the contact point of the fingertip, thereby
changing the resistance value in the circuit, thus changing the changes in current and voltage in the circuit, and thus changing the coordinates of the touch point. .
3. Structure
The structure of the resistive touch screen basically consists of two parts, one is the touch surface and the other is the driving surface. The touch surface is
composed of a layer of glass and a layer of film, while the driving surface is composed of a layer of glass and a layer of film. When the touch surface and the
driving surface come into contact, a resistive closed circuit will be formed, resulting in changes in current and voltage , thereby detecting the coordinates of the touch point.
Resistive touch screen is a common touch screen technology widely used in consumer electronics, industrial control, medical equipment and other fields.
Its working principle is to achieve coordinate positioning through the resistance change formed between the two conductive layers on the surface of the touch screen.
This article will introduce the resistive touch screen in detail from three aspects: working principle, component classification and current status research.
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