The mouse is now mandatory for computers, and the optical mouse is the technology that we hold in our hands, we use it almost every day, we use it now, we use it now as a widely selected mouse, and one is the laser mouse, whose precision is higher than that of the optical mouse, and it is generally required by professionals to use the laser mouse, which we use. Here's a brief description of how the optical mouse works:
The greatest difference between the optical mouse and the mechanical mouse is that it is located differently。
The operation of the pv mouse is that there is a lighted diode inside the pv mouse, lighting the bottom surface of the pv through the light from the pv. A part of the light reflected back on the bottom of the pv mouse is then transmitted through a set of optical lenses to internal imaging of a light sensor device (microimager). Thus, when the optical mouse moves, its movement trajectory is recorded as a coherent set of high-speed images. Finally, a special image analysis chip (dsp, or digital microprocessor) inside the optical mouse is used to analyse and process a series of images taken on the moving trajectory, and to determine the direction and distance of the mouse's movement by analysing changes in the location of the feature points on these images, thus completing the positioning of the cursor。
The optical mouse usually consists of the following components: optical sensors, optical lenses, light diodes, interface microprocessors, light touch buttons, rollers, connections, ps/2 or usb interfaces, shell, etc. These are described below:
Optical sensors
Optical sensors are at the heart of the optical mouse, and only angeline, microsoft and rotte are currently capable of producing optical sensors. Among these, the atm optical sensors are widely used, and the other pvs, with the exception of microsoft's entire and some pvs for rote, are largely based on atm optical sensors。
Optical mouse control chip
The control chip is responsible for coordinating the work of the pv units and communicating with external circuits (bridges) and the transmission and collection of signals. We can interpret it as a housekeeper in the light mouse。
Here's a very important concept you should all know about the effect of dpi on mouse positioning. Dpi is the measure of the number of points that the mouse can detect per inch of movement, the smaller the dpi, the smaller the number of points used to locate, the lower the accuracy of the position; the larger the dpi, the greater the number of points used to locate。
Usually, the conventional mechanical mouse scan accuracy is below 200 dpi, while the optical mouse reaches 400 or even 800 dpi, which is the main reason why the optical mouse can easily exceed the mechanical mouse in its positioning accuracy。
Optical lens component
Optical lens components are placed at the bottom of the optical mouse and it is clear from figure 5 that the optical lens component consists of a prism lens and a circular lens. Where the prism mirror is responsible for transmitting the light from the light diode to the bottom of the mouse and lighting it。
The circular lens corresponds to the lens of a camera, which is responsible for transmitting the image from the bottom of the mouse that has been lit to the small hole in the bottom of the optical sensor. By looking at the back casings of the optical mouse, we can see that the round lens is much like a camera passing through the test, and the pen concludes that the light path, whether to block the prism lens or the round lens, immediately leads to the light mouse being “blind”. The result is that the optical mouse cannot be located, thus demonstrating the importance of optical lens components。
Lighted diodes
Optical sensors perform continuous “photograms” at the bottom of the mouse without light, and nature does not need the support of “photographic lamps”. Otherwise, the images taken from the bottom of the mouse would be dark, so dark images could not be compared and, of course, could not be optically located。
Usually, the lighted diodes (7) used by the pv mouse are red (also partially blue) and bright (for sufficient light). Red light from the luminous diode, partially lighted by optical lenses at the bottom of the mouse (i. E., the prism of the mouse); the other part goes directly to the front of the optical sensors. In one sentence, the function of the luminous diode is to generate the light source required to work with the optical mouse。
Light touch button. A mouse without a key is inconceivable, so there are at least two touchy buttons on a normal light mouse. Three light touch buttons are welded on the pcb of the square light mouse mouse (figure 8). In addition to the left and right keys, the middle key is given to the flip wheel. Advanced mice usually have x, y, and most pvs carry only one pv like this one. If you scroll on or down a wheel, you can scroll on or off the watch documents or web pages. When the wheel is pressed, the medium key on the pcb is activated. Note: actions generated by the middle key can be defined by the user according to its needs。
When we unload the scroller, we can see the position of the wheel, where there is a pair of photovoltaic “launch/receivers”. The "roller" contains a grid, which, by allowing the grid to "block" the light path of the pv "launch/receiver" device to be spaced, gives rise to a penetrating pulse, which is transmitted to the windows operating system by controlling the chip。
The optical mouse has also grown faster and the pace of renewal has become faster. The optical mouse, consisting of optical sensors, optical lenses, luminous diodes, interface microprocessors, light-touch buttons, rollers, etc., has grown stronger and more responsive to people's requirements and has become faster. The principle of the optical mouse has not changed, but the performance is gradually increasing. And here's what we're talking about. I hope it'll help you。
