Introduction
The mouse, sometimes called a pointer, is a hand-operated input device used to manipulate objects on a computer screen.
The mouse was originally known as the X-Y Position Indicator for a Display System and was invented by Douglas Engelbart in 1963 while working at Xerox PARC.
Working of Optical mouse An optical mouse works by having a low resolution camera inside it which takes around 1500 to 6000 pictures per second of the surface beneath it, and by analyzing these images, it calculate the position, speed and movement of the mouse. The mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a co (CMOS) sensor. The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
The mouse, sometimes called a pointer, is a hand-operated input device used to manipulate objects on a computer screen.
Working of Optical mouse An optical mouse works by having a low resolution camera inside it which takes around 1500 to 6000 pictures per second of the surface beneath it, and by analyzing these images, it calculate the position, speed and movement of the mouse. The mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a co (CMOS) sensor. The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
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