Touchscreen Touchscreen-Monitor für Zuhause und unterwegs
Ein Touchscreen ist ein kombiniertes Ein- und Ausgabegerät, bei dem durch Berührung von Teilen eines Bildes der Programmablauf eines technischen Gerätes, meist eines Computers, direkt gesteuert werden kann. Ein Touchscreen (früher: „berührungsempfindlicher Bildschirm“, seltener: „Berührungsbildschirm“, „Tastschirm“, „Sensorbildschirm“) ist ein kombiniertes Ein-. von mehr als Ergebnissen oder Vorschlägen für "Touchscreen". von Ergebnissen oder Vorschlägen für "Hdmi Touchscreen-Monitor". Überspringen und zu Haupt-Suchergebnisse gehen. Amazon Prime. Wie funktioniert ein Touchscreen-Monitor? Ein Touch-Bildschirm stellt im Gegensatz zu alten Monitoren nicht nur Informationen dar.
Ein beidhändiges Bedienen des Touchscreens ist bei der Single-Touch-Technologie nicht möglich. Multi-Touch Displays. Ein Multi-Touch-Screen ist. von Ergebnissen oder Vorschlägen für "Hdmi Touchscreen-Monitor". Überspringen und zu Haupt-Suchergebnisse gehen. Amazon Prime. Auch das Tablet wird über ein Touch Display bedient und gesteuert. Warum nicht also diese Technik auf einen klassischen PC Monitor übertragen? Touchscreen.
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This type of touchscreen reduces the visible distance between the user's finger and what the user is touching on the screen, reducing the thickness and weight of the display, which is desirable in smartphones.
A simple parallel-plate capacitor has two conductors separated by a dielectric layer. Most of the energy in this system is concentrated directly between the plates.
Some of the energy spills over into the area outside the plates, and the electric field lines associated with this effect are called fringing fields.
Part of the challenge of making a practical capacitive sensor is to design a set of printed circuit traces which direct fringing fields into an active sensing area accessible to a user.
A parallel-plate capacitor is not a good choice for such a sensor pattern. Placing a finger near fringing electric fields adds conductive surface area to the capacitive system.
The additional charge storage capacity added by the finger is known as finger capacitance, or CF.
The capacitance of the sensor without a finger present is known as parasitic capacitance, or CP. In this basic technology, only one side of the insulator is coated with a conductive layer.
A small voltage is applied to the layer, resulting in a uniform electrostatic field. When a conductor, such as a human finger, touches the uncoated surface, a capacitor is dynamically formed.
The sensor's controller can determine the location of the touch indirectly from the change in the capacitance as measured from the four corners of the panel.
As it has no moving parts, it is moderately durable but has limited resolution, is prone to false signals from parasitic capacitive coupling , and needs calibration during manufacture.
It is therefore most often used in simple applications such as industrial controls and kiosks. Although some standard capacitance detection methods are projective, in the sense that they can be used to detect a finger through a non-conductive surface, they are very sensitive to fluctuations in temperature, which expand or contract the sensing plates, causing fluctuations in the capacitance of these plates.
This limits applications to those where the finger directly touches the sensing element or is sensed through a relatively thin non-conductive surface.
Projected capacitive touch PCT; also PCAP technology is a variant of capacitive touch technology but where sensitivity to touch, accuracy, resolution and speed of touch have been greatly improved by the use of a simple form of "Artificial Intelligence".
This intelligent processing enables finger sensing to be projected, accurately and reliably, through very thick glass and even double glazing.
Some modern PCT touch screens are composed of thousands of discrete keys,  but most PCT touch screens are made of a matrix of rows and columns of conductive material, layered on sheets of glass.
This can be done either by etching a single conductive layer to form a grid pattern of electrodes , or by etching two separate, perpendicular layers of conductive material with parallel lines or tracks to form a grid.
In some designs, voltage applied to this grid creates a uniform electrostatic field, which can be measured.
When a conductive object, such as a finger, comes into contact with a PCT panel, it distorts the local electrostatic field at that point.
This is measurable as a change in capacitance. If a finger bridges the gap between two of the "tracks", the charge field is further interrupted and detected by the controller.
The capacitance can be changed and measured at every individual point on the grid. This system is able to accurately track touches.
Due to the top layer of a PCT being glass, it is sturdier than less-expensive resistive touch technology. Unlike traditional capacitive touch technology, it is possible for a PCT system to sense a passive stylus or gloved finger.
However, moisture on the surface of the panel, high humidity, or collected dust can interfere with performance. These environmental factors, however, are not a problem with 'fine wire' based touchscreens due to the fact that wire based touchscreens have a much lower 'parasitic' capacitance, and there is greater distance between neighbouring conductors.
This is a common PCT approach, which makes use of the fact that most conductive objects are able to hold a charge if they are very close together.
In mutual capacitive sensors, a capacitor is inherently formed by the row trace and column trace at each intersection of the grid. A voltage is applied to the rows or columns.
Bringing a finger or conductive stylus close to the surface of the sensor changes the local electrostatic field, which in turn reduces the mutual capacitance.
The capacitance change at every individual point on the grid can be measured to accurately determine the touch location by measuring the voltage in the other axis.
Mutual capacitance allows multi-touch operation where multiple fingers, palms or styli can be accurately tracked at the same time.
Self-capacitance sensors can have the same X-Y grid as mutual capacitance sensors, but the columns and rows operate independently. With self-capacitance, the capacitive load of a finger is measured on each column or row electrode by a current meter, or the change in frequency of an RC oscillator.
A finger may be detected anywhere along the whole length of a row. This allows for the speedy and accurate detection of a single finger, but it causes some ambiguity if more than one finger is to be detected.
However, by selectively de-sensitizing any touch-points in contention, conflicting results are easily eliminated. Alternatively, ambiguity can be avoided by applying a "de-sensitizing" signal to all but one of the columns.
By selecting a sequence of these sections along the row, it is possible to determine the accurate position of multiple fingers along that row.
This process can then be repeated for all the other rows until the whole screen has been scanned. Self capacitance is far more sensitive than mutual capacitance and is mainly used for single touch, simple gesturing and proximity sensing where the finger does not even have to touch the glass surface.
Mutual capacitance is mainly used for multitouch applications. Capacitive touchscreens do not necessarily need to be operated by a finger, but until recently the special styli required could be quite expensive to purchase.
The cost of this technology has fallen greatly in recent years and capacitive styli are now widely available for a nominal charge, and often given away free with mobile accessories.
These consist of an electrically conductive shaft with a soft conductive rubber tip, thereby resistively connecting the fingers to the tip of the stylus.
An infrared touchscreen uses an array of X-Y infrared LED and photodetector pairs around the edges of the screen to detect a disruption in the pattern of LED beams.
These LED beams cross each other in vertical and horizontal patterns. This helps the sensors pick up the exact location of the touch.
A major benefit of such a system is that it can detect essentially any opaque object including a finger, gloved finger, stylus or pen.
It is generally used in outdoor applications and POS systems that cannot rely on a conductor such as a bare finger to activate the touchscreen.
Unlike capacitive touchscreens , infrared touchscreens do not require any patterning on the glass which increases durability and optical clarity of the overall system.
Infrared touchscreens are sensitive to dirt and dust that can interfere with the infrared beams, and suffer from parallax in curved surfaces and accidental press when the user hovers a finger over the screen while searching for the item to be selected.
A translucent acrylic sheet is used as a rear-projection screen to display information. The edges of the acrylic sheet are illuminated by infrared LEDs, and infrared cameras are focused on the back of the sheet.
Objects placed on the sheet are detectable by the cameras. When the sheet is touched by the user, the deformation results in leakage of infrared light which peaks at the points of maximum pressure, indicating the user's touch location.
Microsoft's PixelSense tablets use this technology. Optical touchscreens are a relatively modern development in touchscreen technology, in which two or more image sensors such as CMOS sensors are placed around the edges mostly the corners of the screen.
A touch blocks some lights from the sensors, and the location and size of the touching object can be calculated see visual hull.
This technology is growing in popularity due to its scalability, versatility, and affordability for larger touchscreens. Introduced in by 3M , this system detects a touch by using sensors to measure the piezoelectricity in the glass.
Complex algorithms interpret this information and provide the actual location of the touch. Since there is no need for additional elements on screen, it also claims to provide excellent optical clarity.
Any object can be used to generate touch events, including gloved fingers. A downside is that after the initial touch, the system cannot detect a motionless finger.
However, for the same reason, resting objects do not disrupt touch recognition. The key to this technology is that a touch at any one position on the surface generates a sound wave in the substrate which then produces a unique combined signal as measured by three or more tiny transducers attached to the edges of the touchscreen.
The digitized signal is compared to a list corresponding to every position on the surface, determining the touch location.
A moving touch is tracked by rapid repetition of this process. Extraneous and ambient sounds are ignored since they do not match any stored sound profile.
The technology differs from other sound-based technologies by using a simple look-up method rather than expensive signal-processing hardware.
As with the dispersive signal technology system, a motionless finger cannot be detected after the initial touch.
However, for the same reason, the touch recognition is not disrupted by any resting objects. The technology was created by SoundTouch Ltd in the early s, as described by the patent family EP, and introduced to the market by Tyco International 's Elo division in as Acoustic Pulse Recognition.
The technology usually retains accuracy with scratches and dust on the screen. The technology is also well suited to displays that are physically larger.
There are several principal ways to build a touchscreen. The key goals are to recognize one or more fingers touching a display, to interpret the command that this represents, and to communicate the command to the appropriate application.
In the resistive approach, which used to be the most popular technique, there are typically four layers:.
When a user touches the surface, the system records the change in the electric current that flows through the display.
Dispersive-signal technology measures the piezoelectric effect —the voltage generated when mechanical force is applied to a material—that occurs chemically when a strengthened glass substrate is touched.
There are two infrared-based approaches. In one, an array of sensors detects a finger touching or almost touching the display, thereby interrupting infrared light beams projected over the screen.
In the other, bottom-mounted infrared cameras record heat from screen touches. This means that there are nearly twice as many cross-over points for a fixed number of terminal connections and no 'bussed' connections around the edges of the touchscreen.
In each case, the system determines the intended command based on the controls showing on the screen at the time and the location of the touch.
The development of multi-touch screens facilitated the tracking of more than one finger on the screen; thus, operations that require more than one finger are possible.
These devices also allow multiple users to interact with the touchscreen simultaneously. With the growing use of touchscreens, the cost of touchscreen technology is routinely absorbed into the products that incorporate it and is nearly eliminated.
The ability to accurately point on the screen itself is also advancing with the emerging graphics tablet-screen hybrids. Polyvinylidene fluoride PVFD plays a major role in this innovation due its high piezoelectric properties, which allow the tablet to sense pressure, making such things as digital painting behave more like paper and pencil.
TapSense, announced in October , allows touchscreens to distinguish what part of the hand was used for input, such as the fingertip, knuckle and fingernail.
This could be used in a variety of ways, for example, to copy and paste, to capitalize letters, to activate different drawing modes, etc.In neueren, modernen Autos werden immer öfter Multifunktionsdisplays als Touchscreen ausgelegt. Sie benötigen weder Touchscreen noch Tastatur und können flexibel agieren. Ein Touchscreen-Monitor ist eine praktische Alternative zum Gametwiest Bildschirm. Wir verwenden Cookies und ähnliche Technologien auf unserem Webshop. Von dieser Einschränkung sind insbesondere auch Menschen mit trockener Haut sowie Handprothesen betroffen, da sie nur mit Biathlon Jetzt Live Handschuhen oder Eingabestiften die Möglichkeit haben, die Bedienfelder zu aktivieren. Üblicherweise erkennen Touchscreens zwei Berührungspunkte - dieses System wird als Dual-Touch bezeichnet. Handelt es sich um einen Multi-Touchscreen. Auch das Tablet wird über ein Touch Display bedient und gesteuert. Warum nicht also diese Technik auf einen klassischen PC Monitor übertragen? Touchscreen. Touchscreen Monitore von Top Marken günstig online kaufen: große Auswahl, Spitzenpreise & exklusive Vorteile warten auf dich bei xc-cupen.se! Jede Technik eines PC Monitors mit Touch Display hat ihre Vor- und Nachteile. Ein kapazitiver Touchscreen gehört jedoch, dank seiner. Ein beidhändiges Bedienen des Touchscreens ist bei der Single-Touch-Technologie nicht möglich. Multi-Touch Displays. Ein Multi-Touch-Screen ist.