Function-oriented Knowledge Base \ Optical Mouse Cord
Infrared signals transmit cursor control signals to computer
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Introduction A conventional computer mouse is generally connected
to a computer via a connection cord. A problem associated
with a corded mouse is that the cord often gets in the way
and is annoying. Moreover, it can be broken or operate intermittently.
Since the cord is a necessary element, the mouse is limited
in its operational area. It would be highly desirable to provide
a mouse or other pointing device without a corded connection
to the computer.
Description To transmit a cursor control signal to a computer,
the use of infrared signals is proposed. A proposed cordless
mouse is comprised of a transmission port that emits infrared
signals into a special mouse pad. The pad is comprised of
an upper section and a lower section. From three lateral sides,
the upper section is surrounded with a light-absorbing material.
On one lateral side, the upper section borders on a light
pipe. The upper section of the pad receives infrared signals.
The received infrared signals propagate horizontally toward
the light pipe. When the user's hand manipulates the mouse,
the light pipe collects infrared signals and directs them
into a light receiver. The light receiver retranslates infrared
signals to the computer with or without light amplification.
By using its own light receiver, the computer converts the
infrared signals into cursor control signals. The cursor control
signals are supplied to the input port of a host computer.
Thus, infrared signals transmit a cursor control signal to
a computer.
Additional information The upper section of the mouse pad is made of
a liquid display backlighting material. The lower section
of the mouse pad is made of a resilient, foam-like material.
Any other infrared signals propagating in the horizontal direction
are absorbed in the light-absorbing material. This prevents
undesired reflections of the infrared signals within the pad.
