JP2011180548A - Display device and electronic device - Google Patents

Abstract

A display device capable of sufficiently writing image data to sub-pixels even when the resolution is increased.
A plurality of sub-pixels 14 having a thin film transistor 15 disposed adjacent to a scanning line 11 with the scanning line 11 interposed therebetween, and a plurality of disposed adjacent to each other with the scanning line 11 interposed therebetween. The thin film transistor 15 of one of the sub pixels 14 and the thin film transistor 15 of the other sub pixel 14 are connected to the same scanning line 11.
[Selection] Figure 2

Description

  The present invention relates to a display device and an electronic apparatus, and particularly to a display device and an electronic apparatus including a plurality of pixels.

  Conventionally, a display device including a plurality of pixels is known (see, for example, Patent Document 1). In the liquid crystal display device (display device) described in Patent Document 1, a plurality of pixels are arranged in a matrix, and one scanning line is arranged for each row of pixels.

JP 2009-210967 A

  However, in the display device described in Patent Document 1, when the display device has a high resolution (that is, the number of pixels increases), the number of scanning lines increases, so during the period of one frame. There is a disadvantage that the period during which one scanning line is at the H level is shortened. As a result, since the period during which the thin film transistor included in the pixel is turned on is shortened, there is a problem in that image data cannot be sufficiently written to the pixel (sub-pixel).

  The present invention has been made to solve the above-described problems, and one object of the present invention is a display capable of sufficiently writing image data to sub-pixels even when the resolution is increased. It is to provide an apparatus and an electronic device.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, a display device according to a first aspect of the present invention includes a scanning line and a plurality of subpixels that are arranged adjacent to each other with the scanning line interposed therebetween and have thin film transistors. A thin film transistor of one sub-pixel and a thin film transistor of the other sub-pixel among a plurality of sub-pixels arranged so as to be adjacent to each other are connected to the same scanning line.

  In the display device according to the first aspect, as described above, the thin film transistor of one sub pixel and the thin film transistor of the other sub pixel of the plurality of sub pixels arranged adjacent to each other with the scanning line interposed therebetween. By connecting to the same scanning line, separate scanning lines are provided for the thin film transistor of one of the plurality of subpixels arranged adjacent to each other across the scanning line and the thin film transistor of the other subpixel. Unlike the case of connection, the number of scanning lines can be reduced by half, so even if the number of scanning lines increases due to high resolution, one scanning line is set to the H level during one frame period. Can be lengthened. As a result, the period during which the thin film transistor included in the sub-pixel is turned on becomes long, so that image data can be sufficiently written in the sub-pixel.

  In the display device according to the first aspect, it is preferable that the first signal line and the first signal line for supplying image data to one subpixel and the other subpixel of the subpixels adjacent to each other with the scanning line interposed therebetween. 2 signal lines. According to this structure, even when the thin film transistor of one sub pixel and the thin film transistor of the other sub pixel among a plurality of sub pixels arranged adjacent to each other with the scanning line interposed therebetween are connected to the same scanning line. Easily, image data can be individually supplied to one subpixel and the other subpixel among adjacent subpixels across the scanning line.

  In this case, preferably, the image data includes positive and negative image data whose polarity is inverted every frame, and image data having different polarities is supplied to the first signal line and the second signal line. It is characterized by. With this configuration, image data having different polarities is supplied to one sub-pixel and the other sub-pixel among the plurality of sub-pixels arranged adjacent to each other across the scanning line. Using column inversion driving in which image data having different polarities is supplied from the first signal line and the second signal line, dot inversion driving in which polarities of image data supplied to the sub-pixels in the column direction are alternately changed is performed. be able to.

  In the display device including the first signal line and the second signal line, preferably, the display device further includes a control circuit that controls output of image data supplied to the first signal line and the second signal line. The image data is supplied to a pair of adjacent pixels in a direction in which the scanning line of the pair of pixels to which the image data is supplied extends after the image data is supplied to the pair of adjacent pixels across the scanning line. . With this configuration, image data can be supplied to pixels adjacent in the row direction while one scanning line is kept on, so that one scanning line remains on. In this state, the image data can be supplied to all the pixels for two adjacent rows across the scanning line.

  In the display device including the first signal line and the second signal line, preferably, the sub-pixels arranged in the odd-numbered odd columns and the sub-pixels arranged in the even-numbered columns among the plurality of sub-pixels. The pixel is supplied with image data from the first signal line, and the sub-pixels arranged in the even-numbered columns of the odd-numbered rows and the sub-pixels arranged in the odd-numbered columns of the even-numbered rows are The image data is supplied from the second signal line. With this configuration, by supplying image data having different polarities from the first signal line and the second signal line, the polarities of the image data supplied to the sub-pixels adjacent in the column direction change alternately. At the same time, the polarity of the image data supplied to the sub-pixels adjacent to each other in the row direction changes alternately, so that the image data supplied to the signal line can be easily changed while the column inversion driving is alternately different between the adjacent signal lines. , Dot inversion driving can be performed. As a result, unlike the conventional dot inversion driving in which the polarity of the image data supplied to the signal line is inverted for each sub-pixel, the polarity of the image data supplied to the signal line is inverted for each frame. As the number of times decreases, the power consumption can be reduced.

  In this case, preferably, one image data of positive polarity image data or negative polarity image data is supplied from the first signal line, and positive polarity image data or The other image data of the negative polarity image data is supplied. With this configuration, the signal lines for supplying the positive polarity image data and the signal lines for supplying the negative polarity image data can be alternately arranged. Therefore, the signal lines for supplying the positive polarity image data. It is possible to use a conventional signal inversion driving signal line driving circuit that alternately drives a signal line that supplies negative polarity image data.

  In the display device including the first signal line and the second signal line, preferably, image data is supplied from the first signal line to a sub-pixel arranged in an odd row among the plurality of sub-pixels. The image data is supplied from the second signal line to the sub-pixels arranged in even rows among the plurality of sub-pixels. With this configuration, the thin film transistor placement side (first signal line side or second signal line side) of each of the plurality of sub-pixels included in the pixels adjacent in the row direction can be made the same. Further, the arrangement of the thin film transistors of the plurality of subpixels can be prevented from becoming complicated.

  In this case, preferably, positive-polarity image data is used for the first signal lines of the sub-pixels arranged in the odd-numbered columns and the second signal lines of the sub-pixels arranged in the even-numbered columns among the plurality of sub-pixels. Alternatively, one of the negative-polarity image data is supplied, and the second signal lines of the sub-pixels arranged in the odd-numbered columns of the plurality of sub-pixels and the sub-pixels arranged in the even-numbered columns The first signal line is supplied with the other of the positive image data and the negative image data. With this configuration, the polarity of the image data supplied to the sub-pixels adjacent in the column direction changes alternately, and the polarity of the image data supplied to the sub-pixel adjacent in the row direction changes alternately. The dot inversion drive can be easily performed while the column inversion drive in which the image data supplied to the signal line is alternately different between the adjacent signal lines. As a result, unlike the conventional dot inversion drive that inverts the polarity of the image data supplied to the signal line for each pixel, the polarity of the image data supplied to the signal line is inverted for each frame. Therefore, power consumption can be reduced.

  An electronic apparatus according to a second aspect of the present invention includes a display device having any one of the above configurations. With this configuration, an electronic device including a display device that can sufficiently write image data to sub-pixels even when the resolution is high can be obtained.

1 is a block diagram of a liquid crystal display device according to a first embodiment of the present invention. 1 is a circuit diagram of a display area of a liquid crystal display device according to a first embodiment of the present invention. It is a figure for demonstrating the polarity of the image data supplied to the signal line of the liquid crystal display device by 1st Embodiment of this invention. It is a circuit diagram of the display area of the conventional liquid crystal display device. It is a figure for demonstrating rearrangement of the image data of the liquid crystal display device by 1st Embodiment of this invention. It is a figure for demonstrating the image data supplied to the signal line of the liquid crystal display device by 1st Embodiment of this invention. FIG. 3 is a diagram for explaining image data supplied to a sub-pixel of the liquid crystal display device according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining the polarity of image data supplied to a sub-pixel of the liquid crystal display device according to the first embodiment of the present invention. It is a circuit diagram of the display area of the liquid crystal display device by 2nd Embodiment of this invention. It is a figure for demonstrating the polarity of the image data supplied to the signal line of the liquid crystal display device by 2nd Embodiment of this invention. It is a figure for demonstrating the image data supplied to the sub pixel of the liquid crystal display device by 2nd Embodiment of this invention. It is a figure for demonstrating the 1st example of the electronic device using the liquid crystal display device by 1st and 2nd embodiment of this invention. It is a figure for demonstrating the 2nd example of the electronic device using the liquid crystal display device by 1st and 2nd embodiment of this invention. It is a figure for demonstrating the 3rd example of the electronic device using the liquid crystal display device by 1st and 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
With reference to FIG. 1 and FIG. 2, the structure of the liquid crystal display device 100 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the liquid crystal display device 100 according to the first embodiment includes an I / O (input / output) block 1, a timing control block 2, a data latch block 3, a source driver 4, and a gate driver 5. And a display area 6. The timing control block 2 is an example of the “control circuit” in the present invention. The I / O block 1 is configured to receive image data, timing control signals, and the like. The timing control block 2 is connected to the I / O block 1, the data latch block 3, and the gate driver 5. The I / O block 1 is configured to supply image data to the timing control block 2 via data bus groups A, B, and C described later. The image data supplied via the data bus groups A, B, and C is supplied to a signal line 12 (to be described later) and written to the pixel 13 based on a signal generated by the timing control block 2. It is configured. The data latch block 3 is connected to the timing control block 2 and has a function of temporarily holding image data supplied from the timing control block 2. The source driver 4 is connected to the data latch block 3 and the signal line 12 and is configured to supply the image data held in the data latch block 3 to the pixel 13 via the signal line 12. ing.

  Further, as shown in FIG. 2, a plurality of scanning lines 11 and a plurality of signal lines 12 are arranged in the display region 6 so as to intersect each other. Note that the scanning lines 11 are arranged in order from the arrow Y1 direction to the arrow Y2 direction of the display area 6 in the scanning line G (1), scanning line G (2),..., Scanning line G (m / 2). )including. The signal line 12 includes a signal line S (1), a signal line S (2),..., A signal line S (2n) arranged in order from the arrow X1 direction to the arrow X2 direction in the display area 6. Including. A pixel 13 (sub-pixel 14) is provided at a position where the scanning line 11 and the signal line 12 intersect. The pixels 13 (sub-pixels 14) are arranged in a matrix. One pixel 13 includes a sub-pixel 14a that displays red (R), a sub-pixel 14b that displays green (G), and a sub-pixel 14c that displays blue. Further, the sub-pixel 14a, the sub-pixel 14b, and the sub-pixel 14c are arranged so as to be adjacent in this order along the direction (X direction) in which the scanning line 11 extends.

  The pixel 13 (sub-pixel 14) includes a thin film transistor 15 made of amorphous silicon (a-Si), a pixel electrode 16, a common electrode 17, and a liquid crystal layer 18. The scanning line 11 is connected to the gate of the thin film transistor 15, and the signal line 12 is connected to the source of the thin film transistor 15. A pixel electrode 16 is connected to the drain of the thin film transistor 15. The common electrode 17 is provided to face the pixel electrode 16, and the liquid crystal layer 18 is sandwiched between the pixel electrode 16 and the common electrode 17.

  Here, in the first embodiment, the pixels 13 (sub-pixels 14) are arranged so as to be adjacent to each other with one scanning line 11 interposed therebetween. That is, the thin film transistors 15 of the pixels 13 for two rows are driven by one scanning line 11. In addition, the sub-pixels 14a that display red (R) are arranged adjacent to each other in the column direction (Y direction). Similarly, the sub-pixel 14b that displays green (G) and the sub-pixel 14c that displays blue (B) are also arranged adjacent to each other in the column direction (Y direction).

  In the first embodiment, the signal lines 12a (S (1) and S (3)) are provided on one end side (arrow X1 direction side) and the other end side (arrow X2 direction side) of the sub-pixel 14, respectively. , S (5)... And signal lines 12b (S (2), S (4), S (6)...) Are arranged. The signal line 12a and the signal line 12b are examples of the “first signal line” and the “second signal line” in the present invention, respectively. The signal line 12a is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in the odd-numbered column (first column, third column ...) of the odd-numbered row (first row, third row ...). It is connected. A signal line 12b is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in the even-numbered columns (second column, fourth column,...) Of the odd-numbered rows (first row, third row,...). It is connected. A signal line 12b is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in the odd-numbered columns (first column, third column,...) Of even-numbered rows (second row, fourth row...). It is connected. Further, a signal line 12a is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in an even column (second column, fourth column,...) Of even rows (second row, fourth row...). It is connected.

  In the first embodiment, as shown in FIG. 3, the signal lines 12a (S (1), S (3), S (5)...) Arranged on the X1 direction side of the sub-pixel 14 are In the first frame, positive polarity (+) image data is supplied. The signal lines 12b (S (2), S (4), S (6)...) Arranged on the X2 direction side are supplied with negative (−) image data in the first frame. It is comprised so that. That is, the image data supplied from the signal line 12a and the signal line 12b have different polarities. In the second frame, the polarity of the supplied image data is reversed. Each time the frame changes, the polarity of the image data is reversed.

  Next, the operation of rearranging image data according to the first embodiment of the present invention will be described with reference to FIGS.

  First, the arrangement of image data supplied to the conventional liquid crystal display device 200 having one scanning line 111 for each row shown in FIG. 4 will be described. In the image data supplied to the liquid crystal display device 200, the red color of the first pixel (pi) in the first row from the three data bus groups A, B, and C, respectively, as in the image data array A shown in FIG. Image data of (subpixel 141a), image data of green (subpixel 141b) of the first pixel (pi) in the first row, and blue (subpixel 141c) of the first pixel (pi) of the first row Image data is supplied. Note that “1 row 1pi (red)” shown in FIG. 5 means the image data of the red sub-pixel of the first pixel in the first row. That is, “pi” means a pixel. Thereafter, red, green, and blue image data from the second pixel in the first row to the nth pixel (n is a natural number) are sequentially supplied. After the image data is supplied to all the pixels 13 (sub-pixels 141a, 141b, and 141c) in the first row, the image data of the pixel 13 in the second row starts from the first pixel (pi) in the second row. Sequentially supplied. The same applies to the pixels 13 in the m-th row (m is a natural number) from the pixel 13 in the third row.

  In the liquid crystal display device 100 according to the first embodiment, since two rows of pixels 13 (sub-pixels 14) are connected to one scanning line 11, two rows of image data in the image data array A are stored. Are rearranged to combine them into one. The rearrangement of the image data is performed in the timing control block 2 shown in FIG. FIG. 5 shows an example in which the image data on the first row and the image data on the second row are combined into one. Specifically, as indicated by a dotted line, the red image data of the first row data and the green image data of the first row data of the image data array A are alternately arranged, whereby the data of the image data array B Image data for bus group A is created. Further, the image data of the data bus group B of the image data array B is created by alternately arranging the red image data of the second row data and the blue image data of the first row data of the image data array A. . Further, the image data of the data bus group C of the image data array B is created by alternately arranging the green image data of the second row data and the blue image data of the second row data of the image data array A. .

  That is, when the image data of the i-th row (i is a natural number) and the image data of the i + 1-th row are combined into one, the red image data of the i-th row data of the image data array A and the green of the i-th row data. The image data of the data bus group A of the image data array B is created by alternately arranging the image data. Further, the image data of the data bus group B is created by alternately arranging the red image data of the (i + 1) th row data and the blue image data of the ith row data of the image data array A. Further, the image data of the data bus group C is created by alternately arranging the green image data of the (i + 1) th row data and the blue image data of the (i + 1) th row data of the image data array A.

  Next, an operation of supplying the image data to the signal line 12 of the liquid crystal display device 100 according to the first embodiment of the present invention will be described with reference to FIGS.

  The image data (first row data and second row data) rearranged in the timing control block 2 (see FIG. 1) is supplied to the signal line 12 via the data latch block 3 and the source driver 4. Specifically, as shown in the image data array C in FIG. 6, the image data arranged in the image data array B is one signal line S from the data bus group A, the data bus group B, and the data bus group C. (1) to S (2n). That is, as indicated by a dotted line, the image data of red (sub pixel 14a) of the first pixel (pi) in the first row is supplied from the data bus group A of the image data array B to the signal line S (1). The The signal line S (2) is supplied with red image data of the first pixel (pi) in the second row from the data bus group B. Further, the image data of green (sub pixel 14b) of the first pixel (pi) in the second row is supplied from the data bus group C to the signal line S (3). The signal line S (4) is supplied with green image data of the first pixel (pi) in the first row from the data bus group A. Further, the image data of blue (sub pixel 14c) of the first pixel (pi) in the first row is supplied from the data bus group B to the signal line S (5). Further, the blue image data of the first pixel (pi) in the second row is supplied from the data bus group C to the signal line S (6). Similarly, the image data is supplied in order from the data bus groups A, B, and C after the signal line S (7).

  In other words, the image data is supplied from the data bus group A to the 3j-2nd (j is a natural number) signal line 12 (S (1), S (4),... S (2n-2)). . Further, from the data bus group B, image data is supplied to the 3j−1th signal line 12 (S (2), S (5)..., S (2n−1)). The data bus group C supplies image data to the 3j-th signal line 12 (S (3), S (6)... S (2n)). Similarly, the image data from the third row to the m-th row are rearranged so that the image data for the two rows are combined into one in the timing control block 2 and then sequentially supplied to the signal line 12. .

  Then, as shown in FIG. 7, the image data rearranged by the timing control block 2 is supplied to the sub-pixels 14. Specifically, the timing control block 2 sequentially supplies image data to the sub-pixels 14 from the signal line S (1) to the signal line S (n). Accordingly, the red sub-pixel 14 in the first pixel in the first row, the red sub-pixel 14 in the first pixel in the second row, the green sub-pixel 14 in the first pixel in the second row, and the 1 in the first row The image data is supplied in the order of the green sub-pixel 14 of the first pixel, the blue sub-pixel 14 of the first pixel in the first row, and the blue sub-pixel 14 of the first pixel in the second row. In the first embodiment, image data is supplied to the first pixel in the first row and the first pixel in the second row adjacent to each other with the scanning line 11 interposed therebetween, and then adjacent to the scanning line 11 direction. Image data is supplied to the second pixel in the first row and the sub-pixel 14 in the second pixel in the second row. Thus, after supplying pixel data to a pair of adjacent pixels 13 across the scanning line 11, the pixel data is applied to a pair of adjacent pixels 13 adjacent to each other in the direction in which the scanning line 11 extends. Supply.

  The red image data in the odd-numbered row and the first column is supplied from the signal line S (1). Further, red image data in even-numbered rows and first columns is supplied from the signal line S (2). Further, the green image data in the even-numbered row and the second column is supplied from the signal line S (3). Further, the green image data in the odd-numbered row and the second column is supplied from the signal line S (4). That is, the signal lines 12a (signal lines S) arranged on the X1 direction side of the sub-pixels 14 are arranged in the sub-pixels 14 arranged in the odd-numbered columns and the sub-pixels 14 arranged in the even-numbered columns. Image data is supplied from (1), S (3), S (5). Further, the signal lines 12b (signal lines S) arranged on the X2 direction side of the sub-pixels 14 are arranged in the sub-pixels 14 arranged in the even-numbered columns of the odd-numbered rows and the sub-pixels 14 arranged in the odd-numbered columns of the even-numbered rows. Image data is supplied from (2), S (4), S (6).

  As shown in FIG. 3, the signal lines 12a (S (1), S (3), S (5)...) Arranged on the X1 direction side of the sub-pixel 14 are in the first frame. Positive (+) image data is supplied. The signal lines 12b (S (2), S (4), S (6)...) Arranged on the X2 direction side are supplied with negative (−) image data in the first frame. The As a result, the image data supplied to the signal lines 12a and 12b is column inversion driving having a different polarity for each column. However, as shown in FIG. In the row direction, dot inversion driving is performed in which positive-polarity image data and negative-polarity image data are alternately arranged.

  In the first embodiment, as described above, the thin film transistor 15 of one sub pixel 14 and the thin film transistor 15 of the other sub pixel 14 among the plurality of sub pixels 14 arranged adjacent to each other with the scanning line 11 interposed therebetween. Are connected to the same scanning line 11, so that the thin film transistor 15 of one of the sub-pixels 14 and the other sub-pixel 14 of the plurality of sub-pixels 14 arranged adjacent to each other across the scanning line 11. Unlike the case where separate scanning lines 11 are connected to the thin film transistor 15, the number of scanning lines 11 can be reduced by half. Therefore, even when the number of scanning lines 11 is increased due to high resolution, one frame is reduced. The period during which one scanning line 11 is at the H level during the period can be lengthened. As a result, the period during which the thin film transistor 15 included in the sub-pixel 14 is turned on becomes longer, so that image data can be sufficiently written in the sub-pixel 14.

  In the first embodiment, as described above, signal lines for supplying image data to one of the sub-pixels 14 and the other sub-pixel 14 of the sub-pixels 14 adjacent to each other with the scanning line 11 interposed therebetween. By providing the signal line 12b and the signal line 12b, the thin film transistor 15 of one sub pixel 14 and the thin film transistor 15 of the other sub pixel 14 among the plurality of sub pixels 14 arranged adjacent to each other with the scanning line 11 interposed therebetween. Can be easily supplied individually to one of the sub-pixels 14 and the other pixel 13 of the adjacent sub-pixels 14 with the scanning line 11 in between. it can.

  In the first embodiment, as described above, the image data includes positive and negative image data whose polarity is inverted every frame, and the image data having different polarities from the signal line 12a and the signal line 12b. Is supplied, image data having different polarities is supplied to one sub-pixel 14 and the other sub-pixel 14 of the plurality of sub-pixels 14 arranged adjacent to each other across the scanning line 11. Therefore, by using column inversion driving in which image data having different polarities is supplied from the signal lines 12a and 12b, dot inversion driving in which the polarities of the image data supplied to the sub-pixels 14 in the column direction are alternately different is used. It can be performed.

  In the first embodiment, as described above, after the timing control block 2 supplies the image data to the pair of adjacent pixels 13 with the scanning line 11 in between, the pair of pixels 13 to which the image data is supplied is supplied. By configuring the image data to be supplied to a pair of pixels 13 adjacent to each other in the direction in which the scanning lines 11 extend, the pixels 13 adjacent to each other in the row direction can remain in a state where one scanning line 11 remains on. Since the image data can be supplied, the image data can be supplied to the pixels 13 of two adjacent rows across the scanning line 11 while the single scanning line 11 is kept on.

  In the first embodiment, as described above, the sub-pixels 14 arranged in the odd-numbered odd columns of the plurality of sub-pixels 14 and the sub-pixels 14 arranged in the even-numbered columns of the even-numbered rows The image data is supplied from the signal line 12a, and the signal line 12b is supplied to the sub-pixel 14 arranged in the even-numbered column of the odd-numbered row and the sub-pixel 14 arranged in the odd-numbered column of the even-numbered row. By supplying the image data from the signal line 12a and the signal line 12b, the polarity of the image data supplied to the sub-pixels 14 adjacent to each other in the column direction is alternately changed by supplying the image data having different polarities from each other. In addition, the polarity of the image data supplied to the sub-pixels 14 adjacent in the row direction can be changed alternately. As a result, the dot inversion drive can be easily performed while the image data supplied to the signal line 12 remains in the column inversion drive that is alternately different between the adjacent signal lines 12. As a result, unlike the conventional dot inversion driving in which the polarity of the image data supplied to the signal line 12 is inverted for each sub-pixel 14, the polarity of the image data supplied to the signal line 12 is inverted for each frame. The power consumption can be reduced by reducing the number of inversions.

  In the first embodiment, as described above, one of positive image data and negative image data is supplied from the signal line 12a, and positive image data or negative electrode is supplied from the signal line 12b. By supplying the other of the positive image data, the signal line 12 for supplying positive image data and the signal line 12 for supplying negative image data can be alternately arranged. It is possible to use a conventional column inversion driving source driver 4 that alternately drives a signal line for supplying negative image data and a signal line for supplying negative image data.

(Second Embodiment)
Next, the configuration of the liquid crystal display device 101 according to the second embodiment will be described with reference to FIGS. 9 and 10. In the second embodiment, among the sub-pixels 14 arranged adjacent to each other in the row direction, image data is supplied from the sub-pixel 14 arranged in the odd column and the sub-pixel 14 arranged in the even column. Unlike the first embodiment in which the signal lines (signal lines 12a and 12b) are different, the signal lines to which image data is supplied by the sub-pixels 14 arranged in the odd rows and the sub-pixels 14 arranged in the even rows. An example in which (signal lines 12a and 12b) are different will be described.

  As shown in FIG. 9, in the liquid crystal display device 101 according to the second embodiment, the signal line 12a is provided on one end side (arrow X1 direction side) and the other end side (arrow X2 direction side) of the sub-pixel 14, respectively. (S (1), S (3), S (5)...) And a signal line 12b (S (2), S (4), S (6)...) Are arranged. A signal line 12a is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in the odd row (first row, third row,...). Further, a signal line 12b is connected to the source of the thin film transistor 15 of the sub-pixel 14 arranged in the even-numbered rows (second row, fourth row,...).

  Further, as shown in FIG. 10, the signal lines 12a (S (1), S (5)...) For supplying image data to the sub-pixels 14 arranged in the odd-numbered columns of the odd-numbered rows are arranged in the first frame. The signal lines 12b (S (2), S (6)... That supply image data to the sub-pixels 14 arranged in the odd-numbered columns of the even-numbered rows while being supplied with the positive (+) image data. ) Is supplied with negative (-) image data in the first frame. Further, the signal line 12a (S (3), S (7)...) For supplying image data to the sub-pixels 14 arranged in the even-numbered columns of the odd-numbered rows has a negative polarity (−) in the first frame. The signal lines 12b (S (4), S (8)...) For supplying image data to the sub-pixels 14 arranged in the even columns in the even rows are supplied to the first frame. Is supplied with positive (+) image data. That is, the polarity of the image data supplied to the signal line 12 changes in the order of positive polarity, negative polarity, negative polarity, and positive polarity.

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment. The operation of rearranging the image data for combining the image data for two rows into one is the same as that in the first embodiment shown in FIGS.

  Next, with reference to FIG. 11, an operation of supplying the image data rearranged by the timing control block 2 to the sub-pixels 14 will be described.

  As shown in FIG. 11, the red image data of the odd-numbered first pixel is supplied from the signal line S (1). Further, the red image data of the even-numbered first pixel is supplied from the signal line S (2). Further, the green image data of the odd-numbered first pixel is supplied from the signal line S (3). Further, the green image data of the even-numbered first pixel is supplied from the signal line S (4). In other words, the signal lines 12a (signal lines S (1), S (3)) on the arrow X1 direction side among the signal lines 12 arranged so as to sandwich the subpixels 14 are arranged in the subpixels 14 arranged in the odd rows. ..)) Image data is supplied. Further, the image data is supplied from the signal lines 12b (signal lines S (2), S (4)...) On the arrow X2 direction side to the sub-pixels 14 arranged in the even rows.

  As shown in FIG. 10, the polarity of the image data supplied to the signal lines S (1), S (2), S (3), S (4)... Is positive, negative, negative. Change in the order of polarity and positive polarity. As a result, as in the first embodiment shown in FIG. 8, the image data supplied to the signal lines 12a and 12b is the image supplied to the sub-pixels 14 while the column inversion drive has different polarities for each column. The data is dot inversion driving in which positive polarity image data and negative polarity image data are alternately arranged in the column direction and the row direction, respectively.

  In the second embodiment, as described above, the image data is supplied from the signal line 12a to the sub-pixels 14 arranged in the odd-numbered rows of the plurality of sub-pixels 14 and the even-number of the plurality of sub-pixels 14 is provided. By supplying image data from the signal line 12b to the sub-pixels 14 arranged in the row, the thin-film transistor 15 side (signal line) of each of the plurality of sub-pixels 14 included in the pixel 13 adjacent in the row direction. 12a side or the signal line 12b side) can be made the same, so that the arrangement of the thin film transistors 15 of the plurality of sub-pixels 14 can be suppressed from becoming complicated.

  In the second embodiment, as described above, the signal lines 12a of the sub-pixels 14 arranged in the odd columns among the plurality of sub-pixels 14 and the signal lines 12b of the sub-pixels 14 arranged in the even columns. Includes supplying either positive image data or negative image data, and arranging the signal lines 12b of the sub-pixels 14 arranged in the odd-numbered columns of the plurality of sub-pixels 14 in the even-numbered columns. By supplying image data of different polarities to the signal lines 12a of the sub-pixels 14 to be changed, the polarities of the image data supplied to the sub-pixels 14 adjacent to each other in the column direction are alternately changed and adjacent to each other in the row direction. The polarity of the image data supplied to the sub-pixels 14 can be changed alternately. As a result, the dot inversion drive can be easily performed while the image data supplied to the signal line 12 remains in the column inversion drive that is alternately different between the adjacent signal lines 12. As a result, unlike the conventional dot inversion driving in which the polarity of the image data supplied to the signal line 12 is inverted for each sub-pixel 14, the polarity of the image data supplied to the signal line 12 is inverted for each frame. The power consumption can be reduced by reducing the number of inversions.

(Application examples)
The electronic apparatus using the liquid crystal display devices 100 and 101 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 12 to 14, the liquid crystal display devices 100 and 101 according to the present embodiment include a PC (Personal Computer) 300 as a first example, a mobile phone 400 as a second example, and a third It can be used for an information portable terminal 500 (PDA: Personal Digital Assistant) as an example.

  In the PC 300 according to the first example of FIG. 12, the liquid crystal display devices 100 and 101 according to the present embodiment can be used for the display screen 310 or the like. In the mobile phone 400 according to the second example of FIG. 13, the liquid crystal display devices 100 and 101 according to the present embodiment can be used for the display screen 410. In the portable information terminal 500 according to the third example of FIG. 14, the liquid crystal display devices 100 and 101 according to the present embodiment can be used for the display screen 510.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the pixel includes three sub-pixels of red, green, and blue is shown, but the present invention is not limited to this. In the present invention, the pixel may include two subpixels, or may include four or more subpixels. In the present invention, the pixel may not include a sub-pixel. That is, a pixel may be configured by one subpixel.

  In the first and second embodiments, the example in which the sub-pixel is driven by dot inversion is shown, but the present invention is not limited to this. In the present invention, the sub-pixels may be driven by column inversion. In this case, image data having different polarities is supplied to the two signal lines arranged at both ends of the odd-numbered sub-pixels and the two signal lines arranged at both ends of the even-numbered sub-pixels.

  In the first and second embodiments, the example in which the signal lines are arranged at both ends of the sub-pixel is shown, but the present invention is not limited to this. For example, two signal lines are arranged at one end of a sub-pixel, and two of the two sub-pixels adjacent to each other across the scanning line are arranged at one end of the sub-pixel. Image data may be individually supplied from one and the other of the signal lines.

  In the first and second embodiments, an example in which the present invention is applied to a liquid crystal display device having a thin film transistor made of amorphous silicon (a-Si) has been described. However, the present invention is not limited to this. For example, the present invention may be applied to a liquid crystal display device having a thin film transistor made of low-temperature polysilicon or high-temperature polysilicon.

  2 timing control block (control circuit) 11 scanning line 12a signal line (first signal line) 12b signal line (second signal line) 13 pixel 14, 14a, 14b, 14c sub pixel 15 thin film transistor

Claims (9)

A scanning line and a plurality of sub-pixels that are arranged adjacent to each other with the scanning line interposed therebetween and have thin film transistors;
The thin film transistor of one sub pixel and the thin film transistor of the other sub pixel of the plurality of sub pixels arranged adjacent to each other with the scan line interposed therebetween are connected to the same scan line. apparatus.   A first signal line and a second signal line for supplying image data to the one sub-pixel and the other sub-pixel among the sub-pixels adjacent to each other across the scanning line; The display device according to claim 1.   The image data includes positive and negative image data whose polarity is inverted every frame, and image data having different polarities is supplied to the first signal line and the second signal line. The display device according to claim 2. A control circuit for controlling output of image data supplied to the first signal line and the second signal line;
The control circuit supplies image data to a pair of adjacent pixels across the scanning line, and then applies a pair of the pixels adjacent to each other in a direction in which the scanning line extends of the pair of pixels to which the image data is supplied. 4. The display device according to claim 2, wherein image data is supplied.   Image data is supplied from the first signal line to the sub-pixels arranged in the odd columns of the odd rows of the plurality of sub-pixels and the sub-pixels arranged in the even columns of the even rows. Image data is supplied from the second signal line to the sub-pixels arranged in the even-numbered columns of the odd rows and the sub-pixels arranged in the odd-numbered columns of the even rows of the plurality of sub-pixels. The display device according to claim 2, wherein the display device is a display device.   One image data of the positive image data or the negative image data is supplied from the first signal line, and the positive image data or the image data is supplied from the second signal line. 6. The display device according to claim 5, wherein the other image data of the negative polarity image data is supplied.   Image data is supplied from the first signal line to the sub-pixels arranged in odd rows of the plurality of sub-pixels, and the sub-pixels arranged in even rows of the plurality of sub-pixels. The display device according to claim 2, wherein image data is supplied to the pixel from the second signal line.   The positive image data is included in the first signal lines of the sub-pixels arranged in odd columns of the plurality of sub-pixels and the second signal lines of the sub-pixels arranged in even columns. Alternatively, one of the negative-polarity image data is supplied, and the second signal line of the sub-pixel disposed in the odd-numbered column of the plurality of sub-pixels is disposed in the even-numbered column. The display according to claim 7, wherein the other image data of the positive polarity image data or the negative polarity image data is supplied to the first signal line of the sub-pixel. apparatus.   An electronic apparatus comprising the display device according to claim 1.

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