recension: HP Pavilion tx1020 - Tablet pc 12"

Ursprungligen inskrivet av ConraDargo
Shit vilken jävla fin Tablet PC det var! Synd på den passiva skärmen bara IMO, men jag gillar verkligen alla andra features och att placera en scroll bredvid musplattan är ju genialt och någonting som alla tillverkare av laptops borde följa Grattis till köpet!

Ursprungligen inskrivet av razor1394
Väldigt intressant. Hade aldrig hört talas om den förut. Den hade dock varit ännu mer attraktiv om den hade haft Intel C2D, DVI istället för VGA och kanske 1GB ram modul.

Jag förstår dock inte hur den kan va så mycket billigare än Asus R1F. Asus R1F kostar ju runt 16000 och har liknande funktioner.

edit:

Nätverksfunktioner Nätverkskort - Ethernet, Fast Ethernet, Gigabit Ethernet, Bluetooth, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n (draft)

Det där kan inte stämma.

Kan även vara bra att veta vilket wlan chip det är i den. Nån som vet?

edit2:

Aha, det är touchscreen (inte Wacom) på den. Inte så konstigt att den är så billig. Bara 100Mb NIC också. Bläh.

Ursprungligen inskrivet av Baxer19
För en inte så insatt, kan du förklara vad som är så dåligt?
Vad är tex Wacom och bara 100Mb NIC, vad innebär det?

Och en fråga till exxoritas... vad är det för upplösning på webbkameran?

Types of digitizers

[edit] Active digitizer

An active digitizer, used in most tablet PCs, can track the position of the pen when it is in proximity to the digitizer. This feature allows the user to "hover" over items on the screen. This can provide helpful functionality such as the ability to view tooltips and auto-hidden items, and to navigate through menus without accidentally activating an item.

Active digitizers can be installed behind the screen, allowing for maximum visibility, although most manufacturers install protectors over the screen to decrease the risk of damage to the LCD.

By using an active digitizer, the user's hand may rest on the screen without affecting the image or mouse pointer; only movement of the stylus affects the mouse pointer.

The most widely used digitizer, a Wacom digitizer projects electromagnetic signals that are reflected by the tablet's pen. The computer then calculates the position of the stylus based on the point in the electromagnetic field the stylus interacts with. Electronic switches inside the pen can change properties of the reflection. For example, a pressure-sensitive switch located behind the tip of the pen is a capacitive change switch, and side switches change the frequency. These features allow the computer to calculate how hard the user is pressing down on the screen and whether a switch is pressed.[1]

Tablets relying on electromagnetic resonation suffer from "jitter", specifically around the edges of the screen. Because the metal at the edges of the screen—as well as in other parts of the computer—changes the properties of the signal that is being reflected back, the tablet digitizer cannot maintain a totally accurate sense of the pen's position. This can make some tasks difficult, e.g. slowly drawing straight lines, aiming at interface elements at the edges, or writing small characters.

UC Logic and Finepoint make other digitizers used in a few tablet PCs. Models incorporating these digitizers suffer from the lack of support in many graphics applications.

Averatec's C3500 line uses UC Logic digitizers. Compaq's TC1000 and Gateway's Convertible Notebook series use Finepoint digitizers.

Finepoint's digitizer technology incorporates a battery-powered pen which actively transmits RF signals to be received by the tablet sensor. This results in lower power usage of the tablet PC itself, but greater size and weight of the pen because of the battery. The main advantage is that the accuracy problems related to interference from metal at the edge of the screen is not an issue.

Early revisions of Finepoint's digitizer, used in Compaq's TC1000, specifically suffered from the use of obscure, non-rechargeable AAAA batteries to power the pen, and did not support pressure sensitivity.

Modern Gateway Convertible Notebooks (CX200/210, CX2600/2700, etc.) use Finepoint MP-800 digitizers. The batteries inside these pens are recharged by an inductance coil while the pen is stored in its compartment. Concerns over the reliability of the pen are the main problem with these models.[2]

[edit] Passive digitizer

A passive digitizer, used in a touchscreen based tablet PC, only knows where the position of the finger is when the user presses down on it. This causes the pointer on the screen to jump to the location of the press and instantly "click". Passive digitizers are either capacitive or resistive. They offer lower accuracy and a higher rate of error—e.g. when the user's hand rests on the screen surface—which makes them less common in tablet PCs.

[edit] Hybrid digitizer

Windows Vista adds formal support for hybrid digitizers including the ability of applications to distinguish between pen and touch input, as well as ability to turn touch input on or off. [3]

More recently, tablet PCs have been equipped with hybrid digitizers that respond to both active pen and passive touch input. This allows the user to utilize simple finger based navigation, as well as the precision of pen input. An example of a tablet PC equipped with a hybrid digitizer is the Lenovo X60 Tablet with MultiTouch.

In June 2007, TabletKiosk began shipping the Sahara Slate PC i440D, a Slate PC with a hybrid, hot-switchable display (although current Vista drivers only allow the active digitizer at this time...XP Tablet 2005 supports full hybrid function)

[edit] Stroking pen

The stroking pen is a combination of a regular biro and a digitizer. While writing on a piece of paper that roughly fits onto the graphics tablet (or tablet PC) an exact digital copy is produced (as long as the paper stays in position). The advantages of this device are: a more natural writing experience, longer battery life of the tablet PC (because the display brightness can be turned down without limiting the visibility) and a spare (exact) paper copy for moments when it is needed (e.g., exams or loss of data on the tablet). The last point may also be seen as a disadvantage, because most people use a tablet to avoid using paper in the first place.