Display device array substrate and display device

• US 20050134544A1
• Filed: 01/28/2005
• Published: 06/23/2005
• Est. Priority Date: 04/30/2003
• Status: Active Grant

• Current Assignee: Toshiba Matsushita Display Technology Co Ltd (Japan Display Incorporated)
• Original Assignee: Toshiba Matsushita Display Technology Co Ltd (Japan Display Incorporated)
• Inventors: Igarashi, Kazuaki, Teranishi, Kentaro
• Granted Patent: US 7,199,775 B2
• Time in Patent Office: Days
• US Class Current: 345/98
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

An array substrate includes a plurality of signal lines (X1-Xm) in a display unit (DSP). One switching element is connected per row to each signal line. A switching element in the Nth row of the Mth pixel column and a switching element in the (N+1)th row of the (M+1)th pixel column are connected to the same signal line, and video signals having opposite polarities are supplied to adjacent signal lines.

Claims

1. A display device array substrate comprising:

a plurality of scanning lines running in a row direction on a substrate;

a plurality of signal lines running in a column direction on the substrate; and

a display unit having m pixel columns in each of which n rows of pixels are arranged,

wherein each pixel includes a switching element placed at an intersection of each scanning line and each signal line, and

one switching element is connected per row to each signal line, a switching element in an Nth row of an Mth pixel column and a switching element in an (N+1)th row of an (M+1)th pixel column are connected to the same signal line, and video signals having opposite polarities are supplied to adjacent signal lines.

2. A display device array substrate according to claim 1, wherein one pixel column placed between first and second signal lines adjacent to each other comprises a switching element connected to the first signal line in the Nth row, and a switching element connected to the second signal line in the (N+1)th row.

3. A display device array substrate according to claim 1, wherein one pixel column is placed between two adjacent signal lines, switching elements in odd-numbered rows forming each pixel column are connected to a signal line placed along one side of the pixel column, and switching elements in even-numbered rows forming the pixel column are connected to a signal line placed along the other side of the pixel column.

4. A display device array substrate according to claim 1, further comprising:

a scanning line driving circuit which is connected to each scanning line, and outputs a driving signal for driving switching elements connected to the same scanning line;

a controller which rearranges video data in a predetermined order in accordance with an arrangement of the pixels; and

a signal line driving circuit which is connected to each signal line, and outputs a video signal to each signal line on the basis of the video data rearranged by the controller.

5. A display device array substrate according to claim 4, wherein the signal line driving circuit outputs video signals having different polarities to the same signal line in each frame.

6. A display device array substrate according to claim 1, wherein a switching element in the Nth row of the (M+1)th pixel column is connected to a predetermined signal line, and a switching element in the (N+1)th row of the Mth pixel column is connected to an auxiliary signal line which is electrically connected to the predetermined signal line.

7. A display device array substrate according to claim 1, wherein,

the display unit has first and second signal lines to which a video signal is supplied, and an auxiliary signal line electrically connected to the second signal line, and includes a first pixel column placed between the auxiliary signal line and first signal line, and a second pixel column placed between the first and second signal lines,

switching elements in the first and second pixel columns of the Nth row are connected to the first and second signal lines, respectively, and

switching elements in the first and second pixel columns of the (N+1)th row are connected to the auxiliary signal line and first signal line, respectively.

8. A display device array substrate according to claim 7, wherein a video signal corresponding to the first pixel column is supplied to the first signal line and a video signal corresponding to the second pixel column is output to the second signal line both at a timing at which switching elements in the Nth row are driven, and

a video signal corresponding to the second pixel column is supplied to the first signal line and a video signal corresponding to the first pixel column is supplied to the second signal line both at a timing at which switching elements in the (N+1)th row are driven.

9. A display device array substrate according to claim 1, wherein a switching element in the (N+1) row of a first pixel column in the display unit is connected to a predetermined signal line, and a switching element in the Nth row of an mth pixel column in the display unit is connected to an auxiliary signal line which is electrically connected to the predetermined signal line.

10. A display device array substrate according to claim 1, wherein

the display unit includes a first pixel column placed between first and second signal lines, and an mth pixel column placed between an mth signal line and an auxiliary signal line electrically connected to the first signal line,

switching elements in the first and mth pixel columns of the Nth row are connected to the second signal line and auxiliary signal line, respectively, and

switching elements in the first and mth pixel lines of the (N+1)th row are connected to the first and mth signal lines, respectively.

11. A display device array substrate according to claim 10, wherein

a video signal corresponding to the mth pixel column is supplied to the first signal line and a video signal corresponding to the first pixel column is output to the second signal line both at a timing at which switching elements in the Nth row are driven, and

a video signal corresponding to the first pixel column is supplied to the first signal line and a video signal corresponding to a second pixel column adjacent to the first pixel column is supplied to the second signal line both at a timing at which switching elements in the (N+1)th row are driven.

12. A display device array substrate according to claim 1, wherein a switching element in the Nth row of the mth pixel column in the display unit is connected to a predetermined signal line, and a switching element in the (N+1)th row of a first pixel column in the display unit is connected to an auxiliary signal line which is electrically connected to the predetermined signal line.

13. A display device array substrate according to claim 1, wherein

the display unit includes an mth pixel column placed between (m−

1)th and mth signal lines, and a first pixel column placed between an auxiliary signal line electrically connected to the mth signal line and a first signal line,

switching elements in the first and mth pixel columns of the Nth row are connected to the first and mth signal lines, respectively, and

switching elements in the first and mth pixel columns of the (N+1)th row are connected to the auxiliary signal line and (m−

1)th signal line, respectively.

14. A display device array substrate according to claim 13, wherein

a video signal corresponding to the first pixel column is supplied to the first signal line and a video signal corresponding to the mth pixel column is output to the mth signal line both at a timing at which switching elements in the Nth row are driven, and

a video signal corresponding to a second pixel column adjacent to the first pixel column is supplied to the first signal line and a video signal corresponding to the first pixel column is supplied to the mth signal line both at a timing at which switching elements in the (N+1)th row are driven.

15. A display device characterized by comprising a display unit which comprises:

an array substrate including a plurality of scanning lines running in a row direction on a substrate, a plurality of signal lines running in a column direction on the substrate, and a switching element placed at an intersection of each scanning line and each signal line;

a counter-substrate which opposes the array substrate; and

a liquid crystal layer held between the array substrate and counter-substrate, and

which has m pixel columns in each of which n pixels are arranged,

wherein the display device further comprises;

a scanning line driving circuit which is connected to each scanning line, and outputs a driving signal for driving switching elements connected to the same scanning line;

a controller which rearranges video data in a predetermined order in accordance with an arrangement of the pixels; and

a signal line driving circuit which is connected to each signal line, and outputs a video signal to each signal line on the basis of the video data rearranged by the controller, and

one switching element is connected per row to each signal line, a switching element in an Nth row of an Mth pixel column and a switching element in an (N+1)th row of an (M+1)th pixel column are connected to the same signal line, and video signals having opposite polarities are supplied to adjacent signal lines.