Tìm hiểu về con chuột máy tính

Tài liệu tham khảo Tìm hiểu về con chuột máy tính

Đại học thái nguyên Trường cao đẳng kinh tế kĩ thuật Tìm hiểu về con chuột máy tính

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SVTH: Nông Hồng Phúc

Trương Quang Trung

Learn about computer mouse

Index :

1. life history

2. Touch Mechanism

3. Connector style

4. The keys and scroll wheel

5. Speed and accuracy

6. Variants of the Mouse

1 life history :

Anyone who uses a computer knows the role

and influence of the utmost importance mouse (mouse) computer how! Douglas Engelbart was invented in 1964, it is not anything new or too

much trouble, but is an indispensable component

in the past few decades In many years of

development, computer mouse also has many

changes and improvements, not only in design but also sensor technologies Mouse sensitivity and now features much better than a few years ago

of induction) in the shop Computer mouse first

appeared in the world of good size with two

wheels perpendicular to each other and you will be using both hands to control it: a hand holding a

mouse and holding a small keyboard

approximately 5 buttons By 1970, engineers at

Xerox PARC Bill Tiếng Việt wheel was replaced

with a classic ball-known that we all know

This marbles can move in any direction, this

motion will be two small wheels inside the mouse recognized, the wheel has small slits allow a flash

of light to the touch through the other side, each interrupt will indicate the mouse is moved Finally,

a sensor signal will collect and review the value of the corresponding coordinates of the mouse on the screen This design is used throughout the 80s, 90 modern design that you see the original design at the academy EPFL (the heart of European

technology that period), then the finished product

is marketed through a first branch of the EPFL

which later became one of the pointing device

manufacturer (Pointing Device) names - Logitech

b Optical:

The mechanism of optical mice is remarkable progress in fabrication of the mouse It removes all mechanical components (bearings and

wheels), replaced by a micro-capture device

This device will continuously capture the surface that the user moves the mouse and through the comparison between these photos, the processor inside the mouse coordinates will be calculated Roughly speaking, the mouse ball using optical sensors to capture the motion of the ball, then use the mouse optical recording device to

capture the motion of the surface

In fact, to calculate exactly the right shots well

So the first important task is to have the device illuminates the surface and a device called a red LED is used for this When illuminated surface, light rays will be reflected and focused through a lens before touching the sensor Thus the image will be very detailed The advantage of next

generation optical mice are not organs should be absolutely no fear of failure due to corrosion or dirt The maintenance is very simple (just wipe the eye to read is finished) Addition of detail

and sensitivity of optical sensor mechanism is a lot better

However, no optical mouse can work on

transparent or glossy surface, and the showy

surface, the mouse does not operate correctly This

is true with the first generation rats In addition,

some mice are inexpensive image processing

system less will not be able to calculate when the

user moves with high speed (high mouse speed can

be moved by up to 1 m / s ) and weaknesses of the optical mouse is the ultimate crash more electricity than mechanical mice

Logitech and Agilent Technologies, Logitech

MX1000 is the first representative of the

generation laser mouse appeared on the market This mouse uses a small laser replacement for

small conventional LEDs Laser technology

allows light rays have a higher concentration and stability in particular

Thus mice can increase the detail of the image capture up to 20 times on the

theory However MX1000 not respond

immediately when you pick it up and let down, this is due to energy-saving

features of it (later versions do not fall

into that)

3 CONNECTOR STYLE:

a Wired:

Serial: serial mouse uses a serial port (also

called a COM port) are very common in 90th

decade but is now very rare, partly because the COM port and slow aging gradually eliminated

from the next generation computer new In

addition, the dominance of USB also contributed

"off" it is history

PS2: used in a long time and now still, every

motherboard has two PS2 ports for mouse and

keyboard However, also affected the PS2's USB gradually being pushed to the brink of

extinction

Most new mice are using USB port and comes

with a USB adapter <-> PS2

USB: This is the most common interface standard now for mice although "many" or "tail", you can

hardly find any kind of mouse does not require a free USB port on your computer The advantage of USB is many times more bandwidth than the serial

or PS2, so all kinds of high-end mice can send

large amounts of signal to locate the PC and so

on, accuracy and sensitivity will increased

significantly Some manufacturers also use 16-bit data channel increased accuracy and decreased

latency compared with 8-bit connection commonly found on the mouse "ordinary."

b Wireless:

Radio: this is the type of wireless connection first and most common is the manufacturer of equipment for their wireless mouse A computer mouse using

this type of communication signal receiver connected

to a computer and a wireless mouse battery left

These two components communicate with each other via radio waves at frequencies of 27MHz some new technologies such as Logitech's Fast RF significantly reduced the lag when playing, receiving signals

Bluetooth: capital is seen as a type of wireless

connection to exchange data between mobile devices Recently, the pointing device using a Bluetooth connection to appear more on the

market Some such as the Logitech diNovo

Media Desktop or Microsoft Optical Desktop

Elite for Bluetooth Basically, using Bluetooth wireless mouse can work with most devices / receive Bluetooth receiver, but if used properly attached, the user will make use of special

features that manufacturers equip Compared with the mouse using radio waves, Bluetooth products have a range of further, lower latency and bandwidth use is 2.4 GHz

RFID: This is a unique invention of a wireless mouse made by A4Tech Mice using RFID for example A4Tech ND-30 RFID forcing users to use their own mobile

attached table The strengths of this design is no need

to use the mouse batteries or wires, so the mouse is very light weight Signal coordinates will be recorded via the electromagnetic field between the touchpad

connected to the computer and mouse However you should note that RFID is limited in range of operations: just the right length of wire where you go into a

computer USB port

c Apple Desktop Bus

Born in 1986, this is a technology invented by Apple Desktop Bus for Mac.Apple machine capable of

connecting directly to 16 devices and used in most Mac products Model up to 1998 when the iMac was The

first switch using USB In early 2005, this connection type again be used in the PowerBook G4 computer

systems in the role of communication between

computer and keyboard with integrated trackpad of it

4 The Keys and scroll wheel:

According to Douglas Engelbart, the optimal

number of mouse buttons should be as much as possible and in fact has shown that it is correct Another important invention in the particular

design and the mouse pointing device is generally small wheel in the middle two buttons that let us see today It is used for tasks page scroll or zoom

in / zoom out the object Later, Logitech and

Microsoft introduced the more advanced version called "tilt wheel" (tilt-wheel) for their high quality products

With the new wheel, users can ricochet two

sides to implement horizontal scroll function

Sometimes you can also find products that use continuous sensor technology instead of wheels and easy to dust problems, for example, the

Logitech V500

Commercialization and marketing has made the way the specs of the mice became more trouble than their

nature First is the speed of image processing: the more the image is "captured" from the sensor of the mouse, its accuracy will be higher Some suggest that the power

of current computer processor at the same time only a few hundred patterns per second This is true but if

more and more number of samples, the average value and will become more standard practice, the

intermediate device shall calculate the coordinates of the processor inside the mouse

It will process model to obtain the average

value before sending to the computer

Another unit is used to evaluate mouse DPI

(Dots per inch) or "resolution of the eye sensors The original use of the CPI (Counts per inch) to calculate the speed of the mouse CPI and DPI only different units (CPI using DPI centimeter

longer use the number of pixels) Later due to

technical reasons, DPI has gradually replaced

the CPI This value represents the number of

pixels the cursor will be sampling a mouse 1 inch above the surface It is worth noting that the

higher the number, accuracy again increases

proportional to the speed of the mouse

So you can move the cursor to the point I want very quickly, without having to scroll a lot but on the contrary, any move that even the smallest

will be recorded and this is not conducive to the main determined

Complicating the user when the mouse's DPI index depends on the screen resolution you use For example: with the same level of DPI, when switching display resolution from 1024x768 to

1600x1200 or higher, you will have to move the mouse longer than for the same distance on the screen

Therefore the DPI value typically found in new generation products (especially the mouse for

gamers) like 1600dpi, 2000dpi is actually

capable of meeting the speed of the mouse with the player's reaction even at high resolution

From there, we found that, due to the precision proportional to movement speed, so the control will be more difficult Manufacturers have many ways to handle this problem through software or hardware directly

However, the main principle is to ignore the

pixels and thus clear the precision will decrease when the mouse speed lowered Balance

problems between the speed and accuracy is

resolved based on the resolution screen of the user 1280x1024 800dpi is fairly level and

where, at high dpi resolution larger screen will help limit the cursor movement speed while

maintaining accuracy

In fact, up to 2000dpi 1600dpi mouse will be

great when using on-screen 1600x1200 or

2048x1536 or more, but if you use them in

screen resolution lower (less than 1280x1024), then problems will occur: it is difficult to selected object, so when you move the mouse a small

distance, the cursor was able to run from corner

to corner display screen and then the opposite This will be a major disadvantage for users who require accuracy in some small (micro) such as design or strategy game

6.Variants of the Mouse:

In fact there are many variations of the original mouse to meet the particular goal For example, when your hand or shoulder pain while using the conventional mouse, you can try this product

just because Trackball requires users to move a finger to move the cursor Currently, you can

see the kind of mouse "hybrid" as follows:

- Trackball instead of the mouse to move the ball with Trackball, users will control the cursor on the screen through a large ball placed on a fixed base

- Mini Mouse: the size is only equal to or smaller than chicken eggs, mini mouse is used for mobile devices such as laptops

- Mouse Camera: as cameras, it will begin the

first movement of the user to move the cursor

accordingly

- Mouse palms (Palm Mouse) was held in the

hand, this kind of mouse works only with 2

buttons Cursor depends on the single touch and pressure will determine the moving speed

- Using the mouse foot (Foot Mouse): for

people with disabilities on hand, the user clicks with the foot

- Mouse as a joystick (Joy Mouse): This is a

combination of joystick and computer mouse,

you use a joystick to move the cursor and click through the buttons at the top

Criteria you need to think about when buying a mouse is the purpose, if such work in the office, the normal mice 800dpila sufficient resolution

and the wireless connection would be useful if you do not want to add wireless to bundle

promiscuous behind the computer For designs that require the very high accuracy, so do not

keep an eye on the wireless mouse Laser

mouse is a good choice for high precision, you should also pay attention to the mouse design

so comfortable if you often work long As for the gamers, the gamers, we roughly divided into

three types:

The nature of players in general entertainment (online games or simple), game players arrayed (Ages of Empires, Warcraft ) , and the First

Person Shooter players (Quake, Doom ) if

you're the first group, the most common types

of mice completely the requirements However,

if the two groups, you will need to click the line

if you want really high-end "than on" along with rivals Once you have "targeted" goal, the

choice between different types of relatively

simple sensors present the least expensive type

of optical mouse is old enough to push the

mouse ball skills on the "corner"

To select appropriate, you should first observe the work environment, if you have a habit of moving

the mouse on the table, make sure that no surface pattern or texture flashy If you have financial

balance the skin, the laser mouse is the most ideal choice, because besides the accuracy is high, the laser mouse has the ability to move almost any

terrain Still another factor is important, but few

people noticed or considered only women, that is the size and shape of the mouse Generally the first criterion in design and is holding the most

comfortable fit Overall the majority of users have not really care about the mouse and is generally

listed them as promotional items to buy computers

Thank the people tracking hoping to receive

input from people Thank very much!