What else is the mouse?

Scroll wheel mouse, optical mouse, laser mouse, needle light mouse.

The scroll wheel mouse has been phased out. The optical mouse is the mainstream, which is mainly divided into the red light mouse of the past and Microsoft's new blue light mouse technology, blue light is more accurate than red light positioning, and the resolution is higher.

Laser mouse is also an optical mouse to be precise, but the laser replaces red light and blue light to achieve a more accurate positioning effect.

The needle light mouse is an invention and creation of China's double delphinium, and the role is similar, which is basically the evolution of accuracy.

For the general public: induction ball mouse (the oldest kind) Optical mouse (common market mouse) Laser mouse (e.g. Logitech G9X SS Sensei).

In fact, the principle of optical mouse is more complicated, and the core of the optical mouse is a low-resolution mini camera.

Called a sensor. As you can see, the principle is to use a light-emitting diode to irradiate a moving surface and reflect it back to the mouse's optical sensor to record the movement and capture the different images of the moving position. When the mouse moves, the sensor continuously photographs the surface of the object and uses digital signal processing to compare individual images to determine the distance and direction of movement.

The resulting results are transmitted back to the computer, and the cursor on the screen moves based on those results.

The principle of the laser mouse is similar to that of the photoelectric mouse, but the light-emitting diode is replaced by a laser diode to illuminate the surface where the mouse moves, and we can clearly see some subtle differences between them on the figure, the laser ray has the same characteristics, when the light is reflected from the surface, it can produce a high-contrast pattern, and the graphics that appear on the sensor will show the details on the surface of the object, even if it is a smooth surface; Conversely, if a different LED is used as a light source, the surface will look exactly the same. It's no wonder that Logitech introduced the MX1000, which claims to be 20 times more accurate than traditional optical mice.

The advantage of the laser mouse is mainly the improvement of surface analysis ability, with the help of the high resolution ability of the laser engine, it can be very effective to avoid the sensor receiving errors or ambiguous displacement data, and more accurate moving surface data feedback will be very beneficial to the positioning of the mouse, so that we can operate on the surface that cannot be used by many photoelectric mice.

Categories: Computer, Networking, >> Hardware.

Problem description: Is the higher the resolution of the mouse, the better?

Analysis: Of course it's an optical mouse good! The higher the resolution, the better.

The optical mouse is an improvement on the basis of a purely mechanical mouse, and the positioning accuracy of the mouse is improved by introducing optical technology. Like a purely mechanical mouse, the optical-mechanical mouse also has a small gelatinous rolling ball, and is connected to the X and Y hinges, but the difference is that the optical-mechanical mouse does not have a circular decoding wheel, but instead has two grating discs with grid slits, and adds light-emitting diodes and photosensitive chips.

The optical mouse also has its congenital defects: the ball at the bottom is not resistant to dirt, and after a period of use, the two slow leakage hinges will be covered with dirt and affect the passage of light, causing problems such as insensitive movement and cursor blocking.

The working principle of the optical mouse is that there is a light-emitting diode inside the optical mouse, and the light emitted by this light-emitting diode illuminates the bottom surface of the photoelectric mouse (which is why the bottom of the mouse always glows). A portion of the light reflected back from the bottom surface of the photoelectric mouse is then transmitted through a set of optical lenses to an optical sensing device (micro-imager) for imaging.

In this way, when the optical mouse moves, its movement trajectory will be recorded as a set of coherent images shot at high speed. Finally, a special image analysis chip (DSP, i.e., digital microprocessor) inside the photoelectric mouse is used to analyze and process a series of images acquired on the moving trajectory, and the movement direction and distance of the mouse are judged by analyzing the changes in the position of the feature points on these images, so as to complete the positioning of the cursor.

Regarding the meaning of the optical mouse, the computer professional terms are explained.

The optical mouse uses a light interrupter to judge the signal, and the most significant feature is that it needs to use a special reflector as a pad when the mouse moves. The main feature of this mat is the tiny black and white dots in it. The reason is that at the bottom of the photomouse, there is a light-emitting diode and two photosensitive tubes perpendicular to each other, when the light-emitting diode irradiates the white point and the black dot, it will produce two states: refraction and non-refraction, and the photosensitive tube will produce the corresponding signal after processing these two states.

This allows the computer to react, and once it leaves the pad, the optical mouse cannot be used.