Liquid crystal display device
View Patent ↗To provide a liquid crystal display device with a touch detection function in which any drive method can be adopted. The liquid crystal display device is provided with: a liquid crystal element arrangement that has a plurality of liquid crystal display elements arranged in a matrix shape; a plurality of scanning lines that are arranged in each row of the liquid crystal element arrangement, and supply scanning signals to a plurality of liquid crystal display elements arranged in a corresponding row; a plurality of signal lines that are arranged in each column of the liquid crystal element arrangement, and supply an image signal to a plurality of liquid crystal display elements arranged in a corresponding column; a plurality of touch detection drive electrodes which are arranged in a column of the liquid crystal element arrangement, and to which a drive signal for detecting a touch is supplied; and a touch control part that specifies a touch detection drive electrode from the a plurality of touch detection drive electrodes. Here, the drive signal is supplied to the touch detection drive electrode specified by the touch control part.
1. A liquid crystal display device, comprising:
a plurality of liquid crystal display elements in a matrix arrangement that includes rows and columns;
a plurality of scanning lines respectively arranged for each of the rows;
a plurality of signal lines respectively arranged for the columns;
a plurality of drive electrodes arranged for at least one of the columns;
a drive electrode driver configured to drive the drive electrodes as common electrodes in a display period and as touch detection drive electrodes in a touch period, the drive electrode driver being located at a first side of the matrix arrangement, a width of the drive electrode driver being smaller than a total width of the plurality of the drive electrodes;
a signal line selector located between the matrix arrangement and the drive electrode driver;
a plurality of lines connecting the plurality of the drive electrodes to the drive electrode driver, the plurality of lines passing over the signal line selector and inclined toward the drive electrode driver;
a first substrate having the scanning lines, the signal lines, the drive electrodes, the drive electrode driver, the signal line selector, and the lines; and
a second substrate facing the first substrate, wherein
the first substrate has a first area covering the second substrate and a second area uncovering the second substrate,
the drive electrodes are located in the first area and the drive electrode driver is located in the second area, and
the lines are arranged from the first area to the second area.
2. The liquid crystal display device according to claim 1 , wherein inclination angles of respective ones of the plurality of lines are different each other.
3. The liquid crystal display device according to claim 1 , wherein the plurality of signal lines and the plurality of drive electrodes extend in parallel.
4. The liquid crystal display device according to claim 3 , wherein the lines cross an edge of the second substrate.
5. The liquid crystal display device according to claim 3 , wherein a plurality of touch detection electrodes are located on the second substrate, and face the drive electrodes.
6. The liquid crystal display device according to claim 1 , further comprising:
a touch controller that specifies at least two or more drive electrodes that are adjacent to each other by controlling the drive electrode driver, wherein
in the touch period, the touch controller controls the drive electrodes by driving at least one of the drive electrodes based on a clock signal and driving, simultaneously, one or more remaining ones of the drive electrodes based on an inverted clock signal of the clock signal.
7. The liquid crystal display device according to claim 6 , wherein the touch controller drives each of the drive electrodes in accordance with a plurality of combinations of the clock signal and the inverted clock signal, wherein the combinations are different each other.
8. A liquid crystal display device, comprising:
a plurality of scanning lines arranged in a row direction;
a plurality of signal lines arranged in a column direction that is transverse to the row direction;
a plurality of liquid crystal display elements, each liquid crystal display element arranged in an area comparted by the scanning lines and the signal lines;
a plurality of drive electrodes arranged in the column direction;
a drive electrode driver configured to drive the drive electrodes as common electrodes in a display period and as touch detection drive electrodes in a touch period, the drive electrode being located at a first side of the area of the liquid crystal display elements, a width of the drive electrode driver being smaller than a total width of the plurality of the drive electrodes;
a signal line selector located between ends of the drive electrodes and the drive electrode driver;
a plurality of lines connecting the plurality of the drive electrodes to the drive electrode driver, the plurality of lines passing over the signal line selector, wherein
each of the lines are inclined from the column direction;
a first substrate having the scanning lines, the signal lines, the drive electrodes, the drive electrode driver, the signal line selector, and the lines;
a second substrate facing the first substrate, wherein
the first substrate has a first area covering the second substrate and a second area uncovering the second substrate,
the drive electrodes are located in the first area and the drive electrode driver is located in the second area, and
the lines are arranged from the first area e second area.
9. The liquid crystal display device according to claim 8 , wherein inclination angles of respective ones of the plurality of lines are different each other.
10. The liquid crystal display device according to claim 8 , wherein the plurality of signal lines and the plurality of drive electrodes extend in parallel.
11. The liquid crystal display device according to claim 10 , wherein the lines cross an edge of the second substrate.
12. The liquid crystal display device according to claim 10 , wherein a plurality of touch detection electrodes are located on the second substrate, and face the drive electrode.
13. The liquid crystal display device according to claim 8 , further comprising:
a touch controller that specifies at least two or more drive electrodes that are adjacent to each other by controlling the drive electrode driver, wherein
in the touch period, the touch controller controls the drive electrodes by driving at least one of the drive electrode based on a clock signal and driving, simultaneously, one or more remaining ones of the drive electrodes based on an inverted clock signal of the clock signal.
14. The liquid crystal display device according to claim 13 , wherein the touch controller drives each of the drive electrodes in accordance with a plurality of combinations of the clock signal and the inverted clock signal, wherein the combinations are different each other.