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FAQs - Frequently asked questions

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Do you have any questions? We have the answers! In our FAQs you will find an overview of the most frequently asked questions about our products, services and processes. If you can't find the right answer here, please don't hesitate to contact us directly - we'll be happy to help you.

General questions

We are your partner for innovative HMI solutions and offer you customized products, and what's more - everything from a single source.

Sie können uns direkt über unser Kontaktformular oder per E-Mail kontaktieren. Teilen Sie uns die Details Ihres Projekts mit, und wir erstellen Ihnen ein individuelles Angebot.

Order process and delivery

The delivery time depends on the complexity of your project and the availability of the components. Our team will inform you of the exact time frame when you confirm your order.

Yes, we offer flexible solutions that also include small series and prototypes.

Technical support

Yes, our team will support you with all technical questions about our products and their integration into your systems.

Naturally. EP Electronic Print specializes in tailor-made solutions and develops HMI components that perfectly match your requirements.

Product-related questions

Unser Portfolio umfasst HMIs, Touchscreens, Displays, Tasten, Rechnerboard, Folientastaturen, Covergläser, Trägerplatten und Gehäuse, die speziell auf Ihre Anforderungen angepasst werden können.

Wir setzen auf modernste Technologien wie Optical Bonding, Air Gap Bonding, Laminieren, Prägen, Laserschneiden, Metallbearbeitung wie Eloxieren oder Pulverbeschichten, Bedruckung im Sieb- oder Digitaldruck, 3D-Druck, Leiterplatten-Bestückung SMD oder THT, geschlossene Oberflächen und vieles mehr um Ihnen qualitativ hochwertige Lösungen zu bieten.

A multi-touch display is a touchscreen that can recognize several simultaneous touch points. This technology is based on the recognition of finger touches, which are measured using different physical principles such as capacitance, resistivity or infrared sensors. With capacitive touchscreens, the finger is recognized as an electrically conductive material, which causes a change in the electrical field of the display. These changes are detected by sensors on the screen surface and the exact position of the touch is determined.

Capacitive, resistive and optical touch technologies are mainly used for multi-touch displays:

Capacitive touchscreens use the change in the electrical field on the screen surface to recognize touches. They are generally more accurate and responsive and allow a greater number of simultaneous touches.
Resistive touchscreens consist of two layers that come into contact with each other when pressure is applied. They are less precise and do not offer a high number of simultaneous touches, but are more robust and less expensive.
Optical touchscreens use infrared rays and cameras to detect the position of touches. They are less sensitive to scratches and offer greater transparency.

Capacitive multi-touch displays offer several advantages compared to resistive touchscreens:

Better reaction speed and precision, as they do not require mechanical movement but react to electrical signals.
Recognize multiple touch points, enabling gestures such as pinch-to-zoom or moving multiple objects at the same time.
Longer service life as no mechanical parts are used.
Better image quality due to the higher transparency of the capacitive material.

The number of simultaneous touch points that a multi-touch display can detect depends on the technology used and the implementation. Modern capacitive touchscreens can recognize up to 10 touch points simultaneously, which enables precise handling of gestures such as zooming or rotating applications. In some cases, such as larger interactive displays, the number can be higher.

The sensor resolution is crucial for the precision of a multi-touch display. A higher resolution means that the display has more sensor elements per unit area, which leads to more accurate detection of the touch position. This is particularly important in applications that require high accuracy, such as graphic design or medical diagnostics. A high resolution also ensures that interaction with the display is smoother and less laggy.

Most modern multi-touch displays are based on capacitive technology, which uses the principle of changing the electrical field:

Capacitive technology measures the change in capacitance caused by the approach of a finger to the screen. This change is detected by a matrix of sensors that determine the exact position and intensity of the touch.
Resistive touchscreens are based on the principle of resistance change, which occurs when pressure is applied to the screen and two conductive layers come into contact with each other.
Optical systems use infrared beams and cameras that are projected onto the screen surface. Touching interrupts or reflects these beams, which determines the position of the touch.

The accuracy of a multi-touch display depends on several factors:

Sensor type and density: The more sensors there are on the screen, the more precisely the position of each touch can be detected.
Signal processing: A powerful processor for processing the touch data ensures that the inputs are implemented correctly and without delay. Multi-touch technologies use specialized algorithms to calculate the exact positions and number of touches.
Calibration: Some displays require calibration to optimize accuracy, especially optical touchscreens.

The biggest technical challenges include

Precise sensor integration: To ensure high accuracy, the sensors must have a high density and accuracy without increasing the cost and thickness of the display.
Signal processing: The ability to recognize multiple touch points simultaneously and process the inputs in real time requires powerful and efficient hardware.
Haptic feedback: Multi-touch displays do not provide physical feedback like mechanical buttons, which increases the challenge of user interaction during prolonged use. Visual or acoustic signals are often used.

Multi-touch displays can be affected by various environmental influences:

Moisture: With capacitive touchscreens, moisture can affect the conductivity of the display and reduce recognition accuracy.
Temperature: Extreme temperatures can affect the responsiveness of touchscreens. Cold temperatures can increase the sensitivity of resistive touchscreens, while high temperatures can slow down the response time.
Foreign substances: Dust, dirt or fingerprints on the surface of a display can reduce the recognition rate, especially with capacitive touchscreens that rely on the conductivity of the body.

Multi-touch displays are ideal for gesture-controlled user interfaces due to their ability to recognize several touch points simultaneously:

Gestures such as zooming, rotating or swiping are made possible by the simultaneous recognition of several touches.
Multifunctional interaction: Users can perform several actions simultaneously with one hand, e.g. scrolling with one finger and zooming with two fingers.
Intuitive operation: Multi-touch technology provides a natural, human-like interaction with the device that optimizes the user experience, especially with graphical user interfaces and interactive applications.

LCD (Liquid Crystal Display): LCDs use liquid crystals that sit between two layers of polarizing filters and a backlight. They require separate lighting (usually LEDs) to make the image visible.
LED (Light Emitting Diode): LED is not a display technology in its own right, but describes the illumination of displays. In LED backlight LCDs, LEDs provide the backlight for the LCD panel.
OLED (Organic Light Emitting Diode): With OLEDs, each pixel is illuminated by an organic layer that generates light itself, so no backlight is required. OLEDs offer deeper blacks and higher contrasts as individual pixels can be switched off.

Die Auflösung eines Displays beschreibt die Anzahl der Pixel, die es darstellen kann. Sie wird in der Regel als Anzahl der horizontalen und vertikalen Pixel angegeben (z.B. 1920x1080 für Full HD). Höhere Auflösungen wie 4K (3840x2160) bieten mehr Details, was besonders bei größeren Bildschirmen oder bei der Arbeit mit hochauflösenden Inhalten von Vorteil ist.rungspunkte gleichzeitig zu erkennen, ideal für gestengesteuerte Benutzeroberflächen:

IPS (In-Plane Switching): Provides better color accuracy and wider viewing angles than other technologies. It is well suited for applications where color fidelity and wide viewing angles are required.
TN (Twisted Nematic): These panels have fast response times and are inexpensive, but offer limited viewing angles and poorer color accuracy.
VA (Vertical Alignment): VA panels offer better contrast and deeper blacks than IPS and TN, but the viewing angles are somewhat more limited. They are well suited for movies and games where contrast plays a greater role.

Do you have any further questions?

Kontaktieren Sie uns direkt – unser Team hilft Ihnen gerne weiter!

Everything from a single source

Why EP Electronic Print?

At EP Electronic Print, we rely on state-of-the-art components and technologies to develop innovative and customized HMI solutions.

Do you have any questions or would you like to find out more about our HMI solutions?

Our team will be happy to advise you and work with you to find the best solution for your project. Use our contact form or call us directly - we look forward to hearing from you!

Project request
Technical question

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