Microsoft launches optical mouse to open new technology window



Computer mouse has always been one of the most important user interface technologies. Since the early mouse prototypes of the late 1960s, the mouse has been going through quite a long time, and the ever-changing technological innovation has also improved the performance of the mouse. Microsoft's latest optical mouse opens a new window of technology for mouse positioning and usability.

The mouse's role is important, cheap, and intuitive. At the same time, as with any existing technology, the mouse continues to evolve as technology evolves. Microsoft's recently released BlueTrack family of mice has driven technological innovation in lighting and image processing. As the name implies, the blue light used by BlueTrack replaces the red or laser light emitted by conventional optical mice.

All optical mice have the same pre-work conditions. The surface that the optical mouse slides is illuminated by an LED—usually using some optical components to convert a single point source into a larger range of light. The light illuminating the surface of the mouse pad is then directed to a second curved lens that focuses the reflected light from the illuminated area onto the lower resolution image sensor. No matter how low the pixels are, the image processing can recognize the action by reading the precise characteristics of the surface of the mouse pad and determining the relative direction of the image movement. By observing the passing environment, the mouse can recognize the route it is moving.

However, it is well known that the surface on which the mouse is used to slide is very important for the response of the mouse. If there is a traceable surface change or pattern, the mouse may be able to move but the cursor is no way. Microsoft's solution uses a non-laser blue light source and patented optoelectronic technology to replace the traditional red/infrared LED (commonly known as a laser LED), which is expected to effectively improve the usable range of the mouse's sliding surface.

This blue light technology is said to provide higher contrast images, and to some extent similar to ultraviolet light, allowing hidden details to be presented one by one (imagine crime scenes). Microsoft has also used the diffusivity of LED light sources to provide a more uniform luminous flux in the illuminated area.

After removing all the hidden screws, Microsoft's Blue-Track mouse can be seen at a glance. The LED used for tracking is a simple positioning guide assembly using optical molding. This translucent milky capsule sealing material Transmission characteristics can be achieved. Several other blue LEDs surround the mouse, but their role is only to decorate, illuminate the product logo, or form a blue glow around the mouse casing like a halo effect.

The other half of the optical device is a CMOS image sensor and image processor ASIC designed and manufactured by Microsoft Corporation. The built-in window in the sensor package enables the reflected image to reach the 24 24 24 pixel array of the component (the resolution is still low in terms of imaging standards, but it is more than enough for this). Because the component has control, processing, and imaging capabilities (all powered by two AA batteries), using a small pixel array reduces power consumption and can increase frame processing speed under specific power conditions. The ASIC uses Atmel's 32Kb (4KB) EEPROM to store embedded program code.

Optical technology introduces another key feature of the mouse design in the scroll wheel - the mold 'roller' for scroll control forms an optical chopper and is applied to the wheel motion sensing of the LED/phototransistor. Other mouse input functions are quite rich, but like the simple surface mount switch activated by the usual left/right mouse button, and the action of pressing and tilting the wheel for special functions. Because the mouse lacks other logic, the controller's switches, the wheel chopper code, and the USB communication itself are all done on Microsoft's main ASIC. The design uses the most popular wireless link between the mouse and the host computer without having to use cluttered cables. On the host side, a small USB dongle is used to receive all the mobile data from the mouse; but interestingly, the chip solution does not conform to the Wireless USB standard established by the USB Industry Alliance. Nordic Semiconductor offers a proprietary 2.4 GHz transceiver at both ends of the link (but with slightly different ends). The mouse uses Nordic's NRF24L01 component, while the USB part uses the NRF24LU1 component. The EEPROM is built into the transceiver's single chip, so no additional memory is required.

Most of the electronic components of the mouse are concentrated on two large printed circuit boards, and the rollers and switches are located on the expansion board that is connected to the flexible circuit. A total of about twelve molded dies are required, and the small internal screws are used to hold all the molds and other components together.

Microsoft BlueTrack, which is said to have almost any surface slipping, replaces the red or laser light used in traditional optical mice with blue LEDs.

Now that the computer mouse has been in its fortieth anniversary, it has been an important choice for most computer users to locate tools. Mouse technology is still evolving. Optical technology replaces the mechanical roller that was very easy to get dusty in the past, and now it is further improved in terms of illumination source and image processing, allowing users to more accurately position when using the mouse. At the same time, with the surface of this name, almost all surfaces can be slipped. The BlueTrack appeared, and the mouse's requirements for the sliding surface material were less stringent.

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