METHOD FOR IMPROVING ELECTROMAGNETIC INTERFERENCE BY CHANGING DRIVING FREQUENCY AND LIQUID CRYSTAL DEVICE USING THE SAME
A liquid crystal display device includes a wireless communication module and a liquid crystal display module. The wireless communication module detects a communication frequency of a received wireless data signal and supplies an address mapped to the communication frequency. The liquid crystal display module includes a liquid crystal panel displaying a gray scale voltage in response to a gate driving signal and drives the liquid crystal panel by using a driving frequency mapped to the address.
1 . A liquid crystal display device comprising:
a wireless communication module detecting a communication frequency of a received wireless data signal and supplying an address mapped to the communication frequency; and
a liquid crystal display module that includes a liquid crystal panel displaying a gray scale voltage in response to a gate driving signal and drives the liquid crystal panel by using a driving frequency mapped to the address.
2 . The liquid crystal display device according to claim 1 , wherein the wireless communication module comprises:
a communication frequency memory storing a communication frequency mapping table;
an antenna receiving the wireless data signal; and
a frequency detector detecting the communication frequency of the wireless data signal and supplying an address mapped to the communication frequency by referencing the communication frequency mapping table.
3 . The liquid crystal display device according to claim 2 , wherein the communication frequency mapping table is a table that relates a plurality of communication frequency bands to corresponding addresses.
4 . The liquid crystal display device according to claim 3 , wherein the communication frequency memory comprises an electrically erasable and programmable read only memory (EEPROM).
5 . The liquid crystal display device according to claim 4 , wherein the liquid crystal display module comprises:
a driving frequency memory storing a driving frequency mapping table; and
a timing controller obtaining the driving frequency mapped to the address by referencing the driving frequency mapping table, and generating a data driving clock and a gate driving clock by using the driving frequency.
6 . The liquid crystal display device according to claim 5 , wherein the driving frequency mapping table is a table which relates the addresses to corresponding driving frequencies.
7 . The liquid crystal display device according to claim 6 , wherein a multiplying frequency of the driving frequency is excluded from the communication frequency bands.
8 . The liquid crystal display device according to claim 7 , wherein the driving frequency memory comprises an EEPROM.
9 . The liquid crystal display device according to claim 8 , further comprising:
a gate driver supplying the gate driving signal to the liquid crystal panel in response to the gate driving clock; and
a data driver supplying the gray scale voltage to the liquid crystal panel in response to the data driving clock.
10 . The liquid crystal display device according to claim 1 , wherein the wireless communication module supplies the address to the liquid crystal display module via a display data channel.
11 . A method for improving electromagnetic interference by changing a driving frequency, the method comprising:
storing a communication frequency mapping table and a driving frequency mapping table;
detecting a communication frequency of a received data signal;
supplying an address mapped to the communication frequency by referencing the communication frequency mapping table; and
supplying a driving frequency mapped to the address by referencing the driving frequency mapping table.
12 . The method according to claim 11 , wherein the storing comprises relating a plurality of communication frequency bands to corresponding addresses and storing the related communication frequency bands and addresses.
13 . The method according to claim 12 , wherein the storing further comprises relating the addresses to corresponding driving frequencies and storing the related addresses and driving frequencies.
14 . The method according to claim 13 , wherein the storing further comprises excluding a multiplying frequency of the driving frequency from the communication frequency bands.
15 . The method according to claim 14 , wherein the supplying an address comprises supplying an address mapped to a communication frequency band including the communication frequency.
16 . The method according to claim 11 , further comprising generating a data driving clock and a gate driving clock by using the driving frequency.