Digital displays – find manufacturers and suppliers

Digital displays are electronic display units that show measured values, process data or status information in numeric or alphanumeric form.

They are used in almost all technical and industrial areas - from simple voltage displays in control cabinets and machine displays in production plants to high-resolution display and visualization systems in laboratory or medical technology. Thanks to their clear, immediate readability and the possibility of integration into modern control and automation systems, digital displays have largely replaced analog displays in many applications.

The following provides a comprehensive overview of how digital displays work, the most important types, the areas of application and the advantages of digital displays:

How digital displays work:

The functionality of a digital display is basically based on the conversion of a physical signal into an electrical signal, which is then processed and displayed in digital form.

First, a measured variable such as voltage, current, temperature, pressure or speed is recorded by a sensor or transducer.
This analog signal is amplified, filtered or scaled via signal processing.
This is followed by analog-to-digital conversion, in which the continuous input signal is converted into discrete numerical values.

An integrated microcontroller or electronic evaluation unit processes this data and controls the display element.
The display element shows the measured value in the form of digits, symbols or text.
Depending on the design, limit values can also be monitored, relays switched or data transmitted to higher-level systems.

Types of digital displays:

There are various designs and technologies of digital displays, which are used depending on the area of application.

1. LED digital displays:
   LED displays use light-emitting diodes to display numbers or characters.
   They are particularly bright, easy to read and robust against vibrations. Due to their luminosity, they are often used in industrial environments or at greater distances.
2. LCD digital displays:
   LCD displays use liquid crystal technology and are energy efficient.
   They are particularly suitable for battery-operated devices or applications with low power consumption.
   In modern versions, they also enable alphanumeric or graphic displays.
3. TFT and touch displays:
   Graphic displays with TFT technology are used in more complex applications.
   These enable the display of diagrams, menus, process images or several measured values simultaneously.
   In combination with touch function, the operating and display unit can be integrated into one device.
4. Panel meter digital displays:
   Panel digital displays are designed for installation in control panels or machine fronts.
   They display specific measured variables and often have programmable inputs and relay outputs for limit value monitoring.
5. Large displays:
   Large-format digital displays are used in production halls or public areas to make values visible from a greater distance, for example quantities, key production figures or temperature values.
6. Multifunction displays
   These devices record several measured variables simultaneously, such as current, voltage, power or frequency.
   They are often used in energy and building technology.

Use of digital displays:

Digital displays are used in numerous areas.

1. Industry:
In industry, they are used to display process parameters such as temperature, pressure, flow rate or speed.
They allow operating personnel to quickly check and support process monitoring.

2. Power plant and energy technology:
In power engineering, they are used to display electrical parameters, for example in distribution boards or control cabinets.

3. Mechanical engineering:
In mechanical engineering, they are a component of control panels, machine tools or production systems.
They display position values, speeds or production data.

4. Medical technology:
In medical technology and laboratory technology, they display precise measured values and enable reliable documentation.

5. Automation and information systems:
Digital displays are also widely used in building automation, transportation or public information systems.

Advantages of digital displays:

• A major advantage of digital displays is their high reading accuracy. Unlike analog scale displays, they provide exact numerical values without any room for interpretation.
• They enable simple integration into digital control and automation systems. Many devices have interfaces for data transmission, which facilitates central monitoring and documentation.
• Another advantage is flexibility. Limit values, scaling or units can often be programmed and adapted to different applications.
• Modern digital displays are compact, energy-efficient and low-maintenance. LED and LCD technologies offer a long service life and high reliability.
• Last but not least, they increase process reliability. Clear displays and optional alarm functions enable deviations to be detected at an early stage and countermeasures to be initiated.

Digital displays are versatile electronic display units for the precise display of measurement and process data. Their functionality is based on the acquisition, digitization and electronic processing of physical measured variables. Depending on the application, LED, LCD, TFT or panel displays are used. They are used in industry, energy technology, mechanical engineering, medical technology and many other areas. Thanks to their high accuracy, good readability, integration capability and flexibility, digital displays offer decisive advantages for modern production and monitoring systems. They are therefore an indispensable component of modern technical systems.

Here are the most important aspects to look out for when buying digital displays:

Digital displays are often in permanent use in industrial applications and must function reliably under sometimes demanding environmental conditions. The professional purchase of digital displays therefore requires a systematic analysis of the technical requirements, the environmental conditions and the integration options in existing systems. In addition to pure display quality, factors such as interfaces, accuracy, robustness and long-term availability play a central role. A well-founded procurement decision contributes significantly to process stability and investment security.

• The procurement process begins with a precise definition of the measured variables to be displayed.
• It must be clarified whether voltage, current, temperature, pressure, speed, flow rate or other physical variables are to be displayed.
• This determines which input signals need to be supported, for example analog standard signals such as 4-20 mA or 0-10 V, digital pulses or fieldbus signals.
• The accuracy required must also be defined. In laboratory or calibration applications, significantly higher precision requirements must be met than in simple display applications. The resolution of the display, the number of digits and the stability of the measured value display should be selected according to the application.
• Display format and readability
• The type of display is a decisive factor.
• LED displays offer high brightness and are easy to read even from a distance.
• LCD displays are energy-efficient and are particularly suitable for compact or battery-operated devices.
• TFT displays enable graphical representations, several values at the same time and user-friendly menu navigation.
• Purchasers should consider the lighting conditions under which the display will be operated. In bright production halls or outdoors, high contrasts and, if necessary, resistance to sunlight are required.
• The viewing angle also plays a role, especially for control panels mounted at an angle.
• Digital displays are often used in demanding environments. Dust, moisture, vibrations or temperature fluctuations can impair their function.
• Therefore, attention should be paid to a suitable degree of protection, especially when front mounting in control cabinets or machine housings. Robust housing materials and a resistant front screen increase the service life.
• The permissible temperature range should also be checked. In industrial applications, high ambient temperatures or extreme cold can occur, which must be taken into account when making a selection.
• Modern digital displays are often part of networked systems. Compatibility with existing control systems, PLC systems or fieldbuses is therefore crucial.
• The purchasing department should check which communication interfaces are required, for example Modbus, Profibus, Ethernet or other industrial protocols.
• Relay outputs for limit value messages or alarm signals can also be important.
• Simple parameterization via keypad or software makes commissioning easier and reduces the amount of training required.
• Depending on the application, it may be necessary to define limit values, calculate average values or save minimum and maximum values. Some digital displays offer extensive additional functions such as data logging or alarm management.
• Professional purchasers should carefully consider which functions are actually required. An oversized solution can result in unnecessary costs, while a display that is too simple may require subsequent retrofitting.
• Digital displays are often integrated into systems for the long term. The reliability of the components is therefore of great importance. A long service life of the display elements, stable electronics and tested quality standards increase operational safety.
• The long-term availability of the product is just as important. Purchasing should ensure that replacement devices or compatible successor models are still available in several years' time to guarantee maintenance and replacement.
• Depending on the industry, certain standards or approvals may be required. In industry, CE marking and corresponding EMC tests are often required. Additional requirements apply in special areas such as medical technology or energy supply.
• Compliance with relevant standards should be documented and proven by appropriate certificates.
• In addition to the purchase price, installation costs, maintenance costs and service life should also be taken into account. A high-quality display with a low risk of failure can be more economical in the long term than a low-cost solution with frequent malfunctions.
• It is therefore advisable to take a holistic view of the total costs over the life cycle.
• The manufacturer's experience and service capability play an important role. Technical advice during selection, support during integration and a reliable supply of spare parts increase investment security.
• A competent contact person can help to avoid wrong decisions and find the optimum solution for the respective application.

The professional purchase of digital displays requires a careful analysis of the technical requirements, the environmental conditions and the integration options in existing systems. The decisive factors are suitable input signals, sufficient accuracy, good readability and robust construction. In addition, interfaces, programmability, conformity to standards and long-term availability play a central role. Companies that systematically take these factors into account and work with experienced suppliers create the basis for reliable, low-maintenance and future-proof display and monitoring systems.

Digital displays can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Digital displays from all over the world can be found on Exportpages.