graphictablet - 必应 词典美 英 un.图形输入装置；图板网络绘图板un.1.图形输入装置2.图板绘图板计算机的常用英文单词_操作系统_黑客安全论坛 ... Gigahertz 千兆赫 Graphictablet 绘图板 greenpc 绿色个人计算机 ... |必应词典应用准确权威无广告下 载 手 机 版 必 应 词 典体 验 P C 版 必 应 词 典计算机英语_百度文库
两大类热门资源免费畅读
续费一年阅读会员，立省24元！
计算机英语
上传于||文档简介
&&计​算​机​专​业​英​语​词​汇
阅读已结束，如果下载本文需要使用5下载券
想免费下载本文？
定制HR最喜欢的简历
下载文档到电脑，查找使用更方便
还剩12页未读，继续阅读
定制HR最喜欢的简历
你可能喜欢From Wikipedia, the free encyclopedia
Not to be confused with .
"Gtablet" redirects here. For another use, see .
This article needs additional citations for . Please help
by . Unsourced material may be challenged and removed. (September 2007) ()
Wacom Bamboo Capture tablet and pen-like stylus
Wacom graphics tablet and pen-like stylus
A graphics tablet (also known as a digitizer, drawing tablet, digital drawing tablet, pen tablet, or digital art board) is a computer
that enables a user to hand-draw images, animations and graphics, with a special pen-like , similar to the way a person draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures. It can also be used to trace an image from a piece of paper which is taped or otherwise secured to the tablet surface. Capturing data in this way, by tracing or entering the corners of linear poly-lines or shapes, is called .
The device consists of a flat surface upon which the user may "draw" or trace an image using the attached , a pen-like drawing apparatus. The image is displayed on the computer , 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.
The first electronic handwriting device was the , patented by
in 1888. 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. Better known (and often misstated as the first digitizer tablet) is the
also known as the Grafacon (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
in a small
signal. The stylus would receive the magnetic signal, which could then be decoded back as coordinate information.
The , or spark tablet, used a stylus that generated clicks with a . The clicks were then triangulated by a series of microphones to locate the pen in space. 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
Corp. These digitizers were used as the input device for many high-end
(Computer Aided Design) systems as well as bundled with PCs and PC-based CAD software like .
Summagraphics also made an
version of its BitPad which was sold by
as the Apple Graphics Tablet accessory to their . These tablets used a
technology which used wires made of a special
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.
graphics tablet was the . Though originally designed for the , the Koala eventually broadened its applicability to practically all home computers with graphics support, examples of which include the , , and . Competing tablets were the tablets produced by
were generally considered to be of high quality.
In 1981, musician
created the first color graphics tablet software for personal computers, which was licensed to Apple as the Utopia Graphics Tablet System.
In the 1980s, several vendors of graphics tablets began to include additional functions, such as
and on-tablet menus.
There have been many attempts to categorize the technologies that have been used for graphics tablets:
Passive tablets
Passive tablets, most notably those manufactured by
for example, make use of
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
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
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
white boards, also uses a hybrid of this technology.
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[] example is the technology developed by .
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.
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 , 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.
For all these technologies, the tablet can use the received signal to also determine the distance of the stylus from the surface of the tablet, the tilt (angle from vertical) of the stylus, and other information in addition to the horizontal and vertical positions, such as clicking buttons of the stylus or the rotation of the stylus.
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.
A large-format graphics tablet by manufacturer Summagraphics (OEM'd to Gerber): The puck's external copper coil can be clearly seen.
After styluses, pucks are the most commonly used tablet accessory. A puck is a mouse-like device that can detect its absolute position and rotation. This is opposed to
, which can only sense their relative velocity on a surface (most tablet drivers are capable of allowing a puck to emulate a mouse in operation, and many pucks are marketed as a "mouse".) Pucks range in size and shape, some are externally indistinguishable from a mouse, while others are a fairly large device with dozens of buttons and controls. Professional pucks often have a
which allows the user to see the exact point on the tablet's surface targeted by the puck, for detailed tracing and
(CAD) work.
Digital graphics tablet or drawing board with integrated LCD screen
Some graphics tablets incorporate an
into the tablet itself, allowing the user to draw directly on the display surface.
Graphics tablet/screen hybrids offer advantages over both standard PC
and ordinary graphics tablets. Unlike touchscreens, they offer pressure sensitivity, and their input resolution is generally higher.[] 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
holds many
on key technologies for graphic tablets, which forces competitors to use other technologies or license Wacom's patents. The displays are often sold for thousands of dollars. For instance, the
series ranges from just below US$1,000 to over US$2,000.
Some commercially available graphics tablet-screen hybrids include:
Huion series
's MVP10U, MSP19U and MVP22U products
Tooya series from PenPower
GT-series from
19-Inch Interactive Display
's PenStar products
The GD Itronix "Duo Touch" tablet PC products
The p-active XPC-1710a and XPC-1910a
Improv Electronics' Boogie Boards
There have also been
projects where conventional used
and graphics tablets have been converted to a graphics tablet-screen hybrid.
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 , 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, , , 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 () to write Chinese, Japanese, Korean characters (). 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
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
by , or , gives artists a lot of precision when creating digital drawings or artwork. Photographers can also find working with a graphics tablet during their
can really speed up tasks like creating a detailed layer mask or dodging and burning.
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
submitted electronically. Online teachers may also use a tablet for marking student work, or for live
or lessons, especially where complex visual information or
are required.
are also increasingly using them as
devices, especially during university
while following along with the .
Tablets are also popular for
and , 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
as a pointing device.[] 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
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 si -sized tablets being relatively inexpensive and -sized tablets far more expensive. Modern tablets usually connect to the computer via a
interface.
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.
like those found on some , , and the
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.
A graphics tablet is 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. The product that is using this technology is called
Gray, Elisha (), Telautograph, United States Patent 386,815
Dimond, Tom (), , Proceedings of Eastern Joint Computer Conference, pp. 232–237
Engelbart, Douglas C. (March 1967), , IEEE Transactions on Human Factors in Electronics, pp. 5–15
Whetstone, A. (), , Science Accessories Corporation: United States Patent 3,626,483
Mackintosh, Hamish (18 March 2004). . The Guardian.
, Pencept, Inc.,
, Science Accessories Corporation,
(). Retrieved on .
(PDF), Promethean Ltd., December 2009
, Mira Imaging, Incorporated,
, IEEE Communications, Vol 22 No 4,
Kable, Robert G. (),
(PDF), United States Patent 4,600,807 (full image)
. . Retrieved on .
. Bongofish. Retrieved on .
. Forum.bongofish.co.uk. Retrieved on .
Retrieved on
. PenPower. 2015.
Retrieved on
. DTC Worldwide. Retrieved on .
Aaron Marks (). . Axistive.
Wikimedia Commons has media related to .
: Hidden categories: