Display device having driving circuit
A display device of the present invention has a drain driver mounted to a display substrate and having a gate driver and a controller therein, and also has a power source mounted to a flexible printed board and supplying a power voltage to the gate driver. The wiring of a common control signal outputted from the controller and commonly used in control of the gate driver and the power source is formed on the display substrate so that the number of pads for connecting the display substrate and the flexible printed board is reduced. Thus, the construction of the flexible printed board is simplified, and the entire display device can be made compact.
1. A display device comprising a display substrate arranging plural pixels therein, a gate driver for outputting a scanning signal for scanning said pixels, a power source IC for supplying electric power to said gate driver, a controller for controlling operations of said gate driver and said power source IC, and a flexible printed board connected to said display substrate;
wherein said gate driver and said controller are arranged on said display substrate;
said power source IC is arranged outside said display substrate and supplies electric power to said gate driver through said flexible printed board;
said controller has an output terminal for outputting a common control signal commonly used in control of the gate driver and the power source IC;
said display substrate has wirings divided and pulled out in two directions in the place of said output terminal of said common control signal; and
said common control signal is drawn around and inputted to said gate driver by said wirings on said display substrate, and is inputted to said power source IC through said wirings on said display substrate and said flexible printed board.
2. A display device according to claim 1 , wherein the wiring of said common control signal passes below a chip having said controller in one of said two directions, and is pulled out by passing a side different from the arranging side of said output terminal of said chip.
3. A display device according to claim 2 , wherein the wiring passing below the chip having said controller and pulled out by passing the side different from the arranging side of said output terminal of said chip is connected to said gate driver.
4. A display device according to claim 2 , wherein the wiring passing below the chip having said controller and pulled out by passing the side different from the arranging side of said output terminal of said chip is connected to said power source IC through said flexible printed board.
5. A display device according to claim 2 , wherein the wiring passing below the chip having said controller and pulled out by passing the side different from the arranging side of said output terminal of said chip is pulled out via a dummy terminal.
6. A display device according to claim 1 , wherein said common control signal is two or more signals.
7. A display device according to claim 1 , wherein said controller is built in a drain driver for outputting a video signal to said pixel.
8. A display device according to claim 1 , wherein said display device is a liquid crystal display device.
9. A display device comprising a display substrate arranging plural pixels therein, a gate driver for outputting a scanning signal for scanning said pixels, a power source IC for supplying electric power to said gate driver, a controller for controlling operations of said gate driver and said power source IC, and a flexible printed board connected to said display substrate;
wherein said gate driver and said controller are arranged on said display substrate;
said power source IC is arranged outside said display substrate and supplies electric power to said gate driver through said flexible printed board;
said controller has an output terminal for outputting a common control signal commonly used in control of the gate driver and the power source IC, and a dummy terminal arranged on a side adjacent to the arranging side of said output terminal; and
said gate driver has an input terminal for inputting said common control signal, and a dummy terminal arranged on a side adjacent to the arranging side of said input terminal.
10. A display device according to claim 9 , wherein said dummy terminal of said controller is arranged on a short side of said controller, and the dummy terminal of said gate driver is arranged on a long side of said gate driver.
11. A display device according to claim 9 , wherein said dummy terminal of said controller is arranged on a short side of said controller, and the dummy terminal of said gate driver is arranged on a short side of said gate driver.
12. A display device according to claim 9 , wherein said dummy terminal of said controller is arranged on a long side of said controller, and the dummy terminal of said gate driver is arranged on a long side of said gate driver.
13. A display device according to claim 9 , wherein said dummy terminal of said controller is arranged on a long side of said controller, and the dummy terminal of said gate driver is arranged on a short side of said gate driver.
14. A display device according to claim 9 , wherein said common control signal is wired at least once via the dummy terminal of said controller or said gate driver.
15. A display device according to claim 9 , wherein said common control signal is drawn around and inputted to said gate driver by wiring on said display substrate, and is inputted to said power source IC through the wiring on said display substrate and said flexible printed board.
16. A display device according to claim 9 , wherein said common control signal is two or more signals.
17. A display device according to claim 9 , wherein said controller is built in a drain driver for outputting a video signal to said pixel.
18. A display device according, to claim 9 , wherein said display device is a liquid crystal display device.