Liquid crystal display module and its scanning circuit board
View Patent ↗A liquid crystal display module and its scanning circuit board therein. There are a first scanning circuit and a second scanning circuit located at both ends of each of the scanning lines in the LCD panel. While scanning, both the first scanning circuit and the second scanning circuit drive the same scanning line simultaneously, so as to equivalently reduce the delay effect caused by the RC time constant. The first scan driving circuit and the second scan driving circuit could be placed on different scanning circuit boards with the same layout. The scanning circuit board has two connectors at the both ends and a scanning interface at a side. The scanning circuit board could be used at both sides of the LCD panel by the rotation of 180°.
1. A liquid crystal display module, comprising:
a liquid crystal display panel having a plurality of scanning lines parallel to a first side of the liquid crystal display panel;
a driving circuit unit for generating a first scanning control signal and a second scanning control signal;
a first scanning unit, comprising:
a first scanning circuit board, coupled to the driving circuit unit, for receiving the first scanning control signal; and
a plurality of first scan drivers, coupled between the first scanning circuit board and a second side of the liquid crystal display panel, for sequentially scanning the scanning lines according to the first scanning control signal; and
a second scanning unit, comprising:
a second scanning circuit board, coupled to the driving circuit unit, for receiving the second scanning control signal; and
a plurality of second scan drivers, coupled to the second scanning circuit board and a third side of the liquid crystal display panel opposite to the second side of the liquid crystal panel, for sequentially scanning the scanning lines according to the second scanning control signal;
wherein the first scanning unit and the second scanning unit drive one of the scanning lines simultaneously;
the first scanning circuit board is the same as the second scanning circuit board; each scanning circuit board has a first connection port, a second connection port and a third connection port, the first scan drivers receive the first scanning control signal through the first and second connection ports, not through the third connection port, the second scan drivers receive the second scanning control signal through the second and third connection ports, not through the first connection port, and the scanning of the first scan drivers and the scanning of the second scan drivers are in reverse order.
2. The liquid crystal display module as claimed in claim 1 , wherein the first and the third connection ports are connectors, and the second connection port is scanning interface.
3. The liquid crystal display module as recited in claim 1 , wherein the first scan drivers and the second scan drivers are integrated circuits with tape carrier packages.
4. The liquid crystal display module as recited in claim 1 , wherein the first scanning control signal contains a first data-shifting direction signal and a first scanning activation signal, and the second scanning control signal contains a second data-shifting direction signal and a second scanning activation signal.
5. The liquid crystal display module as recited in claim 4 , wherein the first data-shifting direction signal of the first scanning control signal and the second data-shifting direction signal of the second scanning control signal represent the reverse shifting directions; and the first scanning activation signal of the first scanning control signal and the second scanning activation signal of the second scanning control signal respectively activate the scanning procedures of the first scan drivers and the second scan drivers.
6. The liquid crystal display module as recited in claim 1 , wherein both the first and second scanning circuit board for connecting with a plurality of scan drivers to scan a plurality of scanning lines extending from one side of the liquid crystal display panel to another side of the liquid crystal display panel, each comprises:
the first connector, located at a first end of the scanning circuit board;
the second connector, located at a second end of the scanning circuit board;
the scanning interface for connecting with the scan drivers; and
an on-board circuit for sending the scanning control signals received from the first connector or the second connector to the scanning interface,
wherein the scan drivers connected to the scanning interface sequentially scan the scanning lines from the second side of the liquid crystal display panel when the scanning circuit board is allocated to the second side of the liquid crystal display panel and receives a first scanning control signal via the first connector, and the scan drivers connected to the scanning interface sequentially scan the scanning lines from the third side of the liquid crystal display panel when the scanning circuit board is allocated to the third side of the liquid crystal display panel and receives a second scanning control signal via the second connector.
7. The liquid crystal display module as recited in claim 6 , wherein the first scanning control signal contains a first data-shifting direction signal and a first scanning activation signal, and the second scanning control signal contains a second data-shifting direction signal and a second scanning activation signal.
8. The liquid crystal display module as recited in claim 7 , wherein the first data shifting direction signal of the first scanning control signal and the second data shifting direction signal of the second scanning control signal respectively represent the reverse shifting directions; and the first scanning activation signal of the first scanning control signal and the second scanning activation signal of the second scanning control signal respectively activate the scanning procedures of the first scan drivers and the second scan drivers.
9. A liquid crystal display module, comprising:
a liquid crystal display panel having a plurality of scanning lines parallel to a first side of the liquid crystal display panel;
a driving circuit unit for generating a first scanning control signal and a second scanning control signal;
a first scanning unit, comprising:
a first scanning circuit board, coupled to the driving circuit unit, for receiving the first scanning control signal; and
a plurality of first scan drivers, coupled between the first scanning circuit board and a second side of the liquid crystal display panel, for sequentially scanning the scanning lines according to the first scanning control signal; and
a second scanning unit, comprising:
a second scanning circuit board, coupled to the driving circuit unit, for receiving the second scanning control signal; and
a plurality of second scan drivers, coupled to the second scanning circuit board and a third side of the liquid crystal display panel opposite to the second side of the liquid crystal panel, for sequentially scanning the scanning lines according to the second scanning control signal;
wherein the first scanning unit and the second scanning unit drive one of the scanning lines simultaneously;
the first scanning circuit board is the same as the second scanning circuit board; each scanning circuit board has a first connector, a second connector and a scanning interface, the first scan drivers receive the first scanning control signal through the first connector and the scanning interface, not through the second connector, the second scan drivers receive the second scanning control signal through the second connector and the scanning interface, not through the first connector, and the scanning of the first scan drivers and the scanning of the second scan drivers are in reverse order.
10. The liquid crystal display module as recited in claim 9 , wherein the first scan drivers and the second scan drivers are integrated circuits with tape carrier packages.
11. The liquid crystal display module as recited in claim 9 , wherein the first scanning control signal contains a first data-shifting direction signal and a first scanning activation signal, and the second scanning control signal contains a second data-shifting direction signal and a second scanning activation signal.
12. The liquid crystal display module as recited in claim 11 , wherein the first data-shifting direction signal of the first scanning control signal and the second data-shifting direction signal of the second scanning control signal represent the reverse shifting directions;
and the first scanning activation signal of the first scanning control signal and the second scanning activation signal of the second scanning control signal respectively activate the scanning procedures of the first scan drivers and the second scan drivers.
13. The liquid crystal display module as recited in claim 9 , wherein both the first and second scanning circuit board, respectively configured at a the liquid crystal display module with a the liquid crystal display panel, for connecting with a plurality of scan drivers to scan a plurality of scanning lines extending from one side of the liquid crystal display panel to a another side of the liquid crystal display panel, each comprises:
a the first connector, located at a first end of the scanning circuit board;
a the second connector, located at a second end of the scanning circuit board;
a the scanning interface for connecting with the scan drivers; and
an on-board circuit for sending the scanning control signals received from the first connector or the second connector to the scanning interface,
wherein the scan drivers connected to the scanning interface sequentially scan the scanning lines from the second side of the liquid crystal display panel when the scanning circuit board is allocated to the second side of the liquid crystal display panel and receives the first scanning control signal via the first connector, and the scan drivers connected to the scanning interface sequentially scan the scanning lines from the third side of the liquid crystal display panel when the scanning circuit board is allocated to the third side of the liquid crystal display panel and receives the second scanning control signal via the second connector.
14. The liquid crystal display module as recited in claim 13 , wherein the said first scanning control signal contains a first data-shifting direction signal and a first scanning activation signal, and the second scanning control signal contains a second data-shifting direction signal and a second scanning activation signal.
15. The liquid crystal display module as recited in claim 14 , wherein the first data shifting direction signal of the first scanning control signal and the second data shifting direction signal of the second scanning control signal respectively represent the reverse shifting directions; and the first scanning activation signal of the first scanning control signal and the second scanning activation signal of the second scanning control signal respectively activate the scanning procedures of the first scan drivers and the second scan drivers.