US 6,606,036 B2Granted

Apparatus and method for sensing rotary switch handling direction of monitor

AssigneeLG Electronics Inc.

InventorYong Seog Choi

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Abstract

An apparatus and method for sensing a rotary switch handling direction of a monitor is disclosed, in which a simple configuration can be obtained and accuracy in sensing a handling direction can be enhanced. The apparatus for sensing a rotary switch handling direction of a monitor includes a rotary switch for outputting voltage levels varied correspondingly depending on a user's handling direction, and a microcomputer for storing the voltage levels output from the rotary switch and comparing the voltage levels with a previously stored voltage change/handling direction table to determine a handling direction of the rotary switch. Since the handling direction is sensed by the voltage level difference for respective contacts, it is possible to exactly sense the handling direction and to relatively obtain a simple configuration.

Claims7

Dependent claims

An apparatus for sensing a rotary switch handling direction of a monitor comprising:

a rotary switch including a plurality of resistors serially connected between a power source terminal and a ground terminal, a plurality of fixed contacts each having a different voltage level applied thereto, and a detecting contact rotated by a user's rotary switch handling to contact a particular one of said fixed contacts, each fixed contact connected to a respective one of a plurality of nodes, each of said plurality of nodes located between a respective pair of resistors or between said power source terminal and a resistor for outputting voltage levels varied correspondingly depending on a direction of the user's rotary switch handling;
and
a microcomputer for storing the voltage levels output from the rotary switch and comparing the voltage levels with a previously stored voltage change/handling direction table to sense a handling direction of the rotary switch;
said rotary switch outputting a different voltage level to said microcomputer depending upon which fixed contact is connected to said detecting contact, no two fixed contacts having a same voltage level but each fixed contact connected to said power source terminal through a different resistance level.

1 more element

An apparatus for sensing a rotary switch handling direction of a monitor comprising:

a rotary switch including,
a plurality of resistors serially connected between a power source terminal and a ground terminal;
a plurality of nodes in alternating arrangement with said plurality of resistors;
a plurality of fixed contacts, each of which is connected to a respective one of said plurality of nodes;
and
a detecting contact rotated by a user's rotary switch handling to contact a particular one of said fixed contacts to which a particular voltage level is applied, each of said fixed contacts having a different voltage level;
and
a microcomputer for receiving and storing the voltage levels output from the rotary switch through a single input line and for comparing a current voltage level with a previously stored voltage change/handling direction table to sense, with only two sequential rotary switch voltage level outputs required, a handling direction of the rotary switch.

5 more elements

Dependencies are inferred from the claim text.