From Wikipedia, the free encyclopedia
Not to be confused with Tablet computer.
"Gtablet" redirects here. For another use, see ViewSonic G Tablet.
Wacom Bamboo Capture tablet and pen-like stylus
Wacom graphics tablet and pen-like stylus
The device consists of a flat surface upon which the user may "draw" or trace an image using the attached stylus, a pen-like drawing apparatus. The image is displayed on the computer monitor, though some graphics tablets now also incorporate an LCD screen for a more realistic or natural experience and usability.
Some tablets are intended as a replacement for the computer mouse as the primary pointing and navigation device for desktop computers.
Contents
History
The first electronic handwriting device was the Telautograph, patented by Elisha Gray in 1888.[1] Elisha Gray is best known as a contemporaneous inventor of the telephone to Alexander Graham Bell.The first graphics tablet resembling contemporary tablets and used for handwriting recognition by a computer was the Stylator in 1957.[2] Better known (and often misstated as the first digitizer tablet) is the RAND Tablet[3] also known as the Grafacon[4] (for Graphic Converter), introduced in 1964. The RAND Tablet employed a grid of wires under the surface of the pad that encoded horizontal and vertical coordinates in a small magnetic signal. The stylus would receive the magnetic signal, which could then be decoded back as coordinate information.
The acoustic tablet, or spark tablet, used a stylus that generated clicks with a spark plug. The clicks were then triangulated by a series of microphones to locate the pen in space.[5] The system was fairly complex and expensive, and the sensors were susceptible to interference by external noise.
Digitizers were popularized in the mid 1970s and early 1980s by the commercial success of the ID (Intelligent Digitizer) and BitPad manufactured by the Summagraphics Corp. These digitizers were used as the input device for many high-end CAD (Computer Aided Design) systems as well as bundled with PCs and PC-based CAD software like AutoCAD.
Summagraphics also made an OEM version of its BitPad which was sold by Apple Computer as the Apple Graphics Tablet accessory to their Apple II. These tablets used a magnetostriction technology which used wires made of a special alloy stretched over a solid substrate to accurately locate the tip of a stylus or the center of a digitizer cursor on the surface of the tablet. This technology also allowed Proximity or "Z" axis measurement.
The first home computer graphics tablet was the KoalaPad. Though originally designed for the Apple II, the Koala eventually broadened its applicability to practically all home computers with graphics support, examples of which include the TRS-80 Color Computer, Commodore 64, and Atari 8-bit family. Competing tablets were eventually produced; the tablets produced by Atari were generally considered to be of high quality.
In 1981, musician Todd Rundgren created the first color graphics tablet software for personal computers, which was licensed to Apple as the Utopia Graphics Tablet System.[6]
In the 1980s, several vendors of graphics tablets began to include additional functions, such as handwriting recognition and on-tablet menus.[7][8]
Operation
There have been many attempts to categorize the technologies that have been used for graphics tablets:- Passive tablets
- Passive tablets,[9] most notably those manufactured by Wacom and Huion for example, make use of electromagnetic induction technology, where the horizontal and vertical wires of the tablet operate as both transmitting and receiving coils (as opposed to the wires of the RAND Tablet which only transmit). The tablet generates an electromagnetic signal, which is received by the LC circuit in the stylus. The wires in the tablet then change to a receiving mode and read the signal generated by the stylus. Modern arrangements also provide pressure sensitivity and one or more buttons, with the electronics for this information present in the stylus. On older tablets, changing the pressure on the stylus nib or pressing a button changed the properties of the LC circuit, affecting the signal generated by the pen, which modern ones often encode into the signal as a digital data stream. By using electromagnetic signals, the tablet is able to sense the stylus position without the stylus having to even touch the surface, and powering the pen with this signal means that devices used with the tablet never need batteries. Activslate 50, the model used with Promethean white boards, also uses a hybrid of this technology.[10]
- Active tablets
- Active tablets differ in that the stylus used contains self-powered electronics that generate and transmit a signal to the tablet. These styluses rely on an internal battery rather than the tablet for their power, resulting in a bulkier stylus. Eliminating the need to power the pen means that such tablets may listen for pen signals constantly, as they do not have to alternate between transmit and receive modes, which can result in less jitter.
- Optical tablets
- Optical tablets operate by a very small digital camera in the stylus, and then doing pattern matching on the image of the paper. The most successful[citation needed] example is the technology developed by Anoto.
- Acoustic tablets
- Early models were described as spark tablets—a small sound generator was mounted in the stylus, and the acoustic signal picked up by two microphones placed near the writing surface. Some modern designs are able to read positions in three dimensions.[11][12]
- Capacitive tablets
- These tablets have also been designed to use an electrostatic or capacitive signal. Scriptel's designs are one example of a high-performance tablet detecting an electrostatic signal. Unlike the type of capacitive design used for touchscreens, the Scriptel design is able to detect the position of the pen while it is in proximity to, or hovering above, the tablet. Many multi-touch tablets use capacitive sensing.[13][14]
Compared to touchscreens, a graphics tablet generally offers much higher precision, the ability to track an object which is not touching the tablet, and can gather much more information about the stylus, but is typically more expensive, and can only be used with the special stylus or other accessories.
Some tablets, especially inexpensive ones aimed at young children, come with a corded stylus, using technology similar to older RAND tablets.
Styluses
Puck
A large-format graphics tablet by manufacturer Gerber: The puck's external copper coil can be clearly seen.
Embedded LCD tablets
Digital graphics tablet or drawing board with integrated LCD screen
Graphics tablet/screen hybrids offer advantages over both standard PC touchscreens and ordinary graphics tablets. Unlike touchscreens, they offer pressure sensitivity, and their resolution is generally higher.[citation needed] While their pressure sensitivity and resolution are typically no better than those of ordinary tablets, they offer the additional advantage of directly seeing the location of the physical pen device relatively to the image on the screen. This often allows for increased accuracy and a more tactile, "real" feeling to the use of the device.
The graphics tablet manufacturer Wacom holds many intellectual property patents on key technologies for graphic tablets,[15] which forces competitors to use other technologies or license Wacom's patents. The displays are often sold for thousands of dollars. For instance, the Wacom Cintiq series ranges from just below US$1,000 to over US$2,000.
Some commercially available graphics tablet-screen hybrids include:
- Cintiq from Wacom
- Yiynova's MVP10U, MSP19U and MVP22U products
- GT-series from Huion
- Hitachi Starboard
- Monoprice 19-Inch Interactive Display
- Bosto Kingtee
- USync's PenStar products
- SenTIP from Hanvon
- The GD Itronix "Duo Touch" tablet PC products
- The p-active XPC-1710a and XPC-1910a
- Improv Electronics' Boogie Boards
Uses
Graphics tablets, because of their stylus-based interface and ability to detect some or all of pressure, tilt, and other attributes of the stylus and its interaction with the tablet, are widely considered to offer a very natural way to create computer graphics, especially two-dimensional computer graphics. Indeed, many graphics packages can make use of the pressure (and, sometimes, stylus tilt or rotation) information generated by a tablet, by modifying the brush size, shape, opacity, color, or other attributes based on data received from the graphics tablet.In East Asia, graphics tablets, known as "pen tablets", are widely used in conjunction with input-method editor software (IMEs) to write Chinese, Japanese, Korean characters (CJK). The technology is popular and inexpensive and offers a method for interacting with the computer in a more natural way than typing on the keyboard, with the pen tablet supplanting the role of the computer mouse. Uptake of handwriting recognition among users who use alphabetic scripts has been slower.
Graphics tablets are commonly used in the artistic world. Using a pen-like stylus on a graphics tablet combined with a graphics-editing program, such as Illustrator or Photoshop by Adobe Systems, or CorelDraw, gives artists a lot of precision when creating digital drawings or artwork. Photographers can also find working with a graphics tablet during their post processing can really speed up tasks like creating a detailed layer mask or dodging and burning.
Educators make use of tablets in classrooms to project handwritten notes or lessons and to allow students to do the same, as well as providing feedback on student work submitted electronically. Online teachers may also use a tablet for marking student work, or for live tutorials or lessons, especially where complex visual information or mathematical equations are required. Students are also increasingly using them as note-taking devices, especially during university lectures while following along with the lecturer.
Tablets are also popular for technical drawings and CAD, as one can typically put a piece of paper on them without interfering with their function.
Finally, tablets are gaining popularity as a replacement for the computer mouse as a pointing device.[when?] They can feel more intuitive to some users than a mouse, as the position of a pen on a tablet typically corresponds to the location of the pointer on the GUI shown on the computer screen. Those artists using a pen for graphics work will as a matter of convenience use a tablet and pen for standard computer operations rather than put down the pen and find a mouse.
Graphics tablets are available in various sizes and price ranges; A6-sized tablets being relatively inexpensive and A3-sized tablets far more expensive. Modern tablets usually connect to the computer via a USB or HDMI interface.
Manufacturers
Similar devices
Interactive whiteboards offer high resolution wall size graphic tablets up to 95" along with options for pressure and multiple input. These are becoming commonplace in schools and meeting rooms around the world.[18]Touch screens like those found on some tablet computers, iPads, and the Nintendo DS are operated in similar ways, but they usually use either optical grids or a pressure-sensitive film instead, and therefore they do not need a special pointing device.
The graphics tablet are also used for Audio Haptic products where blind or visually impaired people touch swelled graphics on a graphic tablet and get audio feedback from that.[19] The product that is using this technology is called Tactile Talking Tablet or T3.
See also
Samsung Galaxy Tab Pro 12.2
From Wikipedia, the free encyclopedia
| Also known as | SM-T900 (Wifi) SM-T905 (LTE, 3G & Wifi) |
|---|---|
| Developer | Samsung |
| Product family | Galaxy Tab |
| Type | Tablet, media player, PC |
| Media | MP4, MP3, WMA, MPEG, 3GP, AAF, GIF, ASF, DAT, M4V, SVI, FLA, FLR, WRAP, PPG, Ogg, WMV |
| Operating system | Android 4.4 KitKat with TouchWiz Nature UX |
| CPU | 1.9 GHz octa-core Samsung Exynos 5420 SoC processor (Wi-Fi) or 2.3 GHz quad-core Snapdragon 800 SoC processor (4G/LTE) [1] |
| Memory | 3 GB |
| Storage | 16/32 GB flash memory, microSDXC slot (up to 64 GB) |
| Display | 2560×1600 px, 12.2 in (31 cm) diagonal, WQXGA TFT Pentile[2] display |
| Graphics | ARM Mali-T628MP6 (Wi-Fi model) or Adreno 330 (4G/LTE model) |
| Input | Multi-touch screen, digital compass, proximity, gyroscope, accelerometer and ambient light sensors [3] |
| Camera | 8 MP rear facing, 2 MP front facing |
| Connectivity | LTE 150 Mbps DL, 50 Mbps UL Hexa Band 800/850/900/1800/2100/2600 (4G & LTE model) HSPA+ 42/5.76 Mbit/s 850/900/1900/2100 (4G & LTE model) HSPA+ 21 Mbit/s 850/900/1900/2100 MHz (3G & Wi-Fi model) Wi-Fi 802.11a/b/g/n/ac (2.4 & 5 GHz), Bluetooth 4.0, HDMI (external cable) |
| Power | 9,500 mAh Li-Ion battery |
| Dimensions | 295.6 mm (11.64 in) H 204 mm (8.0 in) W 8 mm (0.31 in) D |
| Weight | 740 g (1.63 lb) |
| Related articles | Samsung Galaxy Tab 3 10.1 Samsung Galaxy Note Pro 12.2 Samsung Galaxy Tab Pro 10.1 Samsung Galaxy Tab Pro 8.4 |
Contents
History
The Galaxy Tab Pro 12.2 was announced on 6 January 2014.[4] It was shown along with the Galaxy Note Pro 12.2, Tab Pro 10.1, and Tab Pro 8.4 at the 2014 Consumer Electronics Show in Las Vegas.[5][7]Features
The Galaxy Tab Pro 12.2 is released with Android 4.4 KitKat. Samsung has customized the interface with its TouchWiz UX software. As well as the standard Google apps, it has Samsung apps such as ChatON, S Suggest, S Voice, Smart Remote (Peel) and All Share Play.[3]The Galaxy Tab Pro 12.2 is available in Wi-Fi-only, and 4G/LTE[8] & Wi-Fi variants. Storage ranges from 32 GB to 64 GB depending on the model, with a microSDXC card slot for expansion. It has a 12.2-inch WQXGA TFT screen with a resolution of 2560x1600 pixel. It also features a 2 MP front camera and an 8 MP rear-facing camera. It also has the ability to record HD videos.
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