为什么手绘板笔触不动但手触能动？

手绘板，也被称为数字绘图板或绘图板，是一种可以用于绘制和设计的工具。它通常由一个敏感的平板和一支电子笔组成。在使用手绘板时，我们会发现一个有趣的现象：当我们移动手触（也就是电子笔）在平板上时，画面可以自由地移动，但是当我们用手触摸平板时，画面却不能随之移动。那么，为什么手绘板笔触不动但手触能动呢？

首先，我们来看一下手绘板的工作原理。手绘板内部含有许多感应器，这些感应器可以检测到电子笔的位置和动作。当电子笔接触到手绘板平面时，感应器会接收到信号并将其传输到计算机中，从而实现对画面的控制和移动。因此，电子笔是通过与感应器的交互来实现对画面的导航。

那么为什么手触（也就是我们的手指）不能像电子笔那样移动画面呢？这个问题涉及到手触的工作原理。我们的手指是由皮肤、肌肉、神经等组成的复杂结构。当我们的手触摸手绘板时，电流会通过我们的身体，这个电流可以影响到手绘板的正常工作。出于安全考虑，手绘板会通过特定的技术屏蔽和过滤掉这些外来干扰信号。因此，手触无法像电子笔那样直接与感应器交互，从而无法移动画面。

总结起来，手绘板笔触不动但手触能动的原因是因为手绘板的感应器只对电子笔的信号作出反应，而对手触的信号进行了屏蔽。这是出于安全和功能限制的考虑，以确保手绘板的正常运作。

Why can't the strokes of a drawing tablet move but the touch of your hand can?

A drawing tablet, also known as a digital drawing tablet or graphics tablet, is a tool used for drawing and designing. It typically consists of a sensitive tablet and an electronic pen. When using a drawing tablet, we notice an interesting phenomenon: when we move the pen (the electronic stylus) on the tablet, the screen moves freely, but when we touch the tablet with our hand, the screen does not move along with it. So, why can't the strokes of a drawing tablet move but the touch of your hand can?

Firstly, let's understand how a drawing tablet works. The tablet contains multiple sensors that can detect the position and movement of the electronic pen. When the pen touches the tablet surface, the sensors receive the signal and transmit it to the computer, enabling control and movement of the screen. Therefore, the electronic pen navigates the screen through interaction with the sensors.

So why can't our touch (i.e., our fingers) move the screen like the electronic pen? This question relates to how touch works. Our fingers are complex structures composed of skin, muscles, nerves, and other components. When we touch the drawing tablet, an electric current passes through our body, which can interfere with the proper functioning of the tablet. For safety reasons, the drawing tablet employs specific techniques to shield and filter out these external interference signals. As a result, touch cannot directly interact with the sensors as the electronic pen does, thereby preventing the movement of the screen.

In conclusion, the reason why the strokes of a drawing tablet cannot move but the touch of your hand can is that the tablet's sensors only respond to the signals from the electronic pen while shielding out the signals from touch. This is done for safety and functional limitations to ensure the proper operation of the drawing tablet.