Liquid crystal display device and method for driving the same

• US 7,518,589 B2
• Filed: 03/04/2005
• Issued: 04/14/2009
• Est. Priority Date: 03/05/2004
• Status: Active Grant

• Current Assignee: Beihai HKC Optoelectronics Technology Company Limited
• Original Assignee: NEC LCD Technologies Limited (Tianma Microelectronics Company Limited)
• Inventors: Takeda, Hiroshi
• Primary Examiner(s): Dharia; Prabodh M
• Application Number:
  US11/071,211
• Publication Number:
  US 20050195141A1
• Time in Patent Office: 1,502 Days
• Field of Search: 345/1.3, 345 87- 89, 345/1.1, 345/530, 345/660, 345/173, 345/92, 345 98-105, 345/1, 345/204, 345/690, 345/94, 345/84, 345212-214, 345/7, 345/31, 345/83, 345/531, 345/545, 345/694, 348/731, 348/671, 348/383, 365/194, 365/233, 349/73, 324/770
• US Class Current: 345/98
• CPC Class Codes: G09G 3/3666 with the matrix divided into sections
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

A liquid crystal display device having two pieces of liquid crystal display panels commonly using a source driver is provided which is capable of displaying a different image in each of the two pieces of liquid crystal display panels. The liquid crystal display device includes the two liquid crystal display panels commonly using drain lines, a timing controller to control outputting timing of an image data signal for each liquid crystal display panel, a source driver to output image data, gate line by gate line, to a plurality of drain lines for each liquid crystal display panel, and gate drivers to sequentially output gate driving pulses to gate lines for each liquid crystal display panel according to a signal to provide instructions for a staff of outputting of an image data signal and to a signal to control an inputting period of image data in every line.

Claims

1. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controller to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driver to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driver and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controller; and

a plurality of gate drivers each corresponding to one of said plurality of liquid crystal display panels, said gate drivers each outputting sequentially gate driving pulses to a plurality of the gate lines connected to the corresponding liquid crystal display panel according to inputting of first and second signals, the first signal, which is fed sequentially to said plurality of gate drivers in a cascaded manner, providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controller, to be fed to the corresponding liquid crystal display panel, and the second signal, which is fed to said plurality of gate drivers in a parallel manner, controlling an inputting period of frame by frame image data, which makes up the corresponding image data signal;

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

2. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controller to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driver to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driver and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controller; and

a gate driver being commonly used by said plurality of liquid crystal display panels and outputting sequentially gate driving pulses to a plurality of the gate lines connected to a designated liquid crystal display panel according to inputting of first, second, and third signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controller, to be fed to the corresponding liquid crystal display panel, the second signal controlling an inputting period of the gate line-by-gate line image data, which makes up the corresponding image data signal, the third signal designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output;

wherein a plurality of the gate line-by-gate line image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.

3. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controller to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driver to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driver and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controller; and

a gate driver being commonly used by said plurality of liquid crystal display panels and outputting sequentially gate driving pulses to a plurality of the gate lines connected to a designated liquid crystal display panel according to inputting of first, second, and third signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controller, to be fed to the corresponding liquid crystal display panel, the second signal controlling an inputting period of the frame-by-frame image data, which makes up the corresponding image data signal, the third signal designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output;

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

4. A method for driving a liquid crystal display device comprising:

a plurality of liquid crystal display panels that are connected to each other by common drain lines, and a plurality of gate drivers being cascaded, said gate drivers each corresponding to one of said plurality of liquid crystal display panels, and controlling a plurality of the gate lines connected to the corresponding liquid crystal display panel, the method comprising the steps of;

outputting image data beginning with head data, frame by frame, to the plurality of drain lines connected to said plurality of liquid crystal display panels, in a manner to control a plurality of image data so as to be input sequentially to the corresponding liquid crystal display panel in one line period;

outputting sequentially gate driving pulses to said plurality of the gate lines of said plurality of liquid crystal display panels in a cascaded manner; and

feeding a signal to said plurality of gate drivers in a parallel manner,

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

5. A method for driving a liquid crystal display device comprising:

a plurality of liquid crystal display panels that are connected to each other by a plurality of common drain lines, and a gate driver being commonly used by said plurality of liquid crystal display panels, and controlling a plurality of the gate lines connected to said plurality of liquid crystal display panels, the method comprising the steps of;

outputting image data beginning with head data, gate line by gate line, to the plurality of drain lines connected to said plurality of liquid crystal display panels, in a manner to control so as to be input sequentially to the corresponding liquid crystal display panel in an inputting period of the number of the gate lines being equal to the number of said plurality of liquid crystal display panels;

designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output; and

outputting sequentially gate driving pulses to said plurality of the gate lines of the designated liquid crystal display panels; and

wherein a plurality of the gate line-by-gate line image data, which makes up a plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.

6. A method for driving a liquid crystal display device comprising:

a plurality of liquid crystal display panels that are connected to each other by a plurality of common drain lines, and a gate driving means being commonly used by said plurality of liquid crystal display panels, and controlling a plurality of the gate lines connected to said plurality of liquid crystal display panels, the method comprising the steps of;

outputting image data beginning with head data, frame by frame, to the plurality of drain lines connected to said plurality of liquid crystal display panels, in a manner to control a plurality of image data so as to be input sequentially to the corresponding liquid crystal display panel in one line period;

designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output; and

outputting sequentially gate driving pulses to said plurality of the gate lines of the designated liquid crystal display panels; and

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

7. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controlling means to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driving means to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driving means and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controlling means; and

a plurality of gate driving means each corresponding to one of said plurality of liquid crystal display panels, said plurality of gate driving means each outputting sequentially gate driving pulses to a plurality of the gate lines connected to the corresponding liquid crystal display panel according to inputting of first and second signals, the first signal, which is fed sequentially to said plurality of gate driving means in a cascaded manner, providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controlling means, to be fed to the corresponding liquid crystal display panel, and the second signal, which is fed to said plurality of gate driving means in a parallel manner, controlling an inputting period of frame by frame image data, which makes up the corresponding image data signal;

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

8. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controlling means to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driving means to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driving means and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controlling means; and

a gate driving means being commonly used by said plurality of liquid crystal display panels and outputting sequentially gate driving pulses to a plurality of the gate lines connected to a designated liquid crystal display panel according to inputting of first, second, and third signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controlling means, to be fed to the corresponding liquid crystal display panel, the second signal controlling an inputting period of the gate line-by-gate line image data, which makes up the corresponding image data signal, the third signal designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output;

wherein a plurality of the gate line-by-gate line image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.

9. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controlling means to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driving means to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driving means and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controlling means; and

a gate driving means being commonly used by said plurality of liquid crystal display panels and outputting sequentially gate driving pulses to a plurality of the gate lines connected to a designated liquid crystal display panel according to inputting of first, second, and third signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controlling means, to be fed to the corresponding liquid crystal display panel, the second signal controlling an inputting period of the frame-by-frame image data, which makes up the corresponding image data signal, the third signal designating one of said plurality of liquid crystal display panels as liquid crystal display panel the to which said image data is output;

wherein a plurality of the frame-by-frame image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the frame-by-frame image data and is output to the drain lines connected to the corresponding liquid crystal display panel.

10. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controller to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driver to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driver and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controller; and

a plurality of gate drivers each corresponding to one of said plurality of liquid crystal display panels, said gate drivers each outputting sequentially gate driving pulses to a plurality of the gate lines connected to the corresponding liquid crystal display panel according to inputting of first and second signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controller, to be fed to the corresponding liquid crystal display panel, and the second signal controlling an inputting period of the gate line-by-gate line image data, which makes up the corresponding image data signal;

wherein a plurality of the gate line-by-gate line image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.

11. A method for driving a liquid crystal display device comprising:

a plurality of liquid crystal display panels that are connected to each other by a plurality of common drain lines, and a plurality of gate drivers each corresponding to one of said plurality of liquid crystal display panels, and controlling a plurality of the gate lines connected to the corresponding liquid crystal display panel, the method comprising the steps of;

outputting image data beginning with head data, gate line by gate line, to the plurality of drain lines connected to said plurality of liquid crystal display panels, in a manner to control so as to be input sequentially to the corresponding liquid crystal display panel in an inputting period of the number of the gate lines being equal to the number of said plurality of liquid crystal display panels; and

outputting sequentially gate driving pulses to said plurality of the gate lines of said plurality of liquid crystal display panels; and

wherein a plurality of the gate line-by-gate line image data, which makes up a plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.

12. A liquid crystal display device comprising:

a plurality of liquid crystal display panels;

a timing controlling means to control outputting timing of a plurality of image data signals, said image data signals each being fed to a corresponding one of said plurality of liquid crystal display panels;

a source driving means to output image data, gate line by gate line, to a plurality of drain lines commonly connected between said source driving means and each of said plurality of liquid crystal display panels according to output timing control exercised by said timing controlling means; and

a plurality of gate driving means each corresponding to one of said plurality of liquid crystal display panels, said plurality of gate driving means each outputting sequentially gate driving pulses to a plurality of the gate lines connected to the corresponding liquid crystal display panel according to inputting of first and second signals, the first signal providing instructions for a start of outputting of the corresponding image data signal, which is transmitted from said timing controlling means, to be fed to the corresponding liquid crystal display panel, and the second signal controlling an inputting period of the gate line-by-gate line image data, which makes up the corresponding image data signal;

wherein a plurality of the gate line-by-gate line image data, which makes up said plurality of image data signals, each is sequentially switched in order of inputting of said plurality of the gate line-by-gate line image data and is output to the corresponding drain line connected to the corresponding liquid crystal display panel.