Display device with touch detection function
View Patent ↗A display device including a display section having a plurality of pixel electrodes; and a plurality of drive electrodes extending in a first direction and arranged side-by-side in a second direction. Each of the drive electrodes has a width in the second direction corresponding to a size of the two or more pixel electrodes, and has one or more slits extending in the first direction.
1. A display device with a touch detection function, comprising:
a pixel substrate;
an opposed substrate disposed to face the pixel substrate;
a plurality of drive electrodes on the pixel substrate, the drive electrodes extending in a first direction and being arranged side-by-side in a second direction, and each of the drive electrodes being supplied with a drive signal;
a display section on the pixel substrate, the display section having a plurality of pixel electrodes that are arranged in matrix in the first and second directions to face the drive electrodes, and the display section allowing an image to be displayed by applying the drive signal to each of the drive electrodes and applying an image signal to each of the pixel electrodes;
a electrode pattern allowing an electrostatic capacitance to be formed between the electrode pattern and the drive electrodes; and,
an image signal wiring and a drive signal wiring on the pixel substrate, the image signal wiring extending in the second direction and supplying the pixel electrodes with the image signal, and the drive signal wiring supplying the drive electrodes with the drive signal,
wherein
each of the drive electrodes has a width in the second direction corresponding to a size of two or more of the pixel electrodes, and has one or more inner-electrode slits extending in the first direction,
an inter-electrode slit that corresponds to the inner-electrode slit is formed between the drive electrodes adjacent to each other,
the drive electrodes are disposed nearer to the opposed substrate than the image signal wiring in the pixel substrate,
the inner-electrode slit is discontinued by non-slit portions of the drive electrode, and
the non-slit portions are disposed at an intersection, as viewed from the opposed substrate, of the inner-electrode slit and the image signal wiring.
2. The display device according to claim 1 , wherein:
each of the drive electrodes has a length in the first direction larger than that of an effective display region in the display section, and
the inner-electrode slit is provided at least in the effective display region.
3. The display device according to claim 1 , wherein:
one or both of a first spacing and a second spacing has a size corresponding to a single pixel electrode, the first spacing representing a distance in the second direction between the inner-electrode slits adjacent to each other, and
the second spacing representing a distance in the second direction between the inner-electrode slit and the inter-electrode slit that are adjacent to each other.
4. The display device according to claim 3 , wherein the inner-electrode slit and the inter-electrode slit are each provided between the pixel electrodes adjacent to each other.
5. The display device according to claim 4 , wherein the display section includes a liquid crystal layer having a mode selected from a group including a twisted-nematic mode, an electrically-controlled birefringence mode, a fringe-field switching mode, and an in-plane switching mode.
6. The display device according to claim 1 , wherein
one or both of a first spacing and a second spacing have dimensions of about 500 micrometers or less, the first spacing representing a distance in the second direction between the inner-electrode slits adjacent to each other, and
the second spacing representing a distance in the second direction between the inner-electrode slit and the inter-electrode slit that are adjacent to each other.
7. The display device according to claim 6 , wherein one or both of the first spacing and the second spacing have dimensions of about 300 micrometers or less.
8. The display device according to claim 1 , wherein the electrode pattern is a plurality of touch detection electrodes that output a detection signal in response to the drive signal applied to the drive electrodes.
9. A display device, comprising:
a pixel substrate;
an opposed substrate disposed to face the pixel substrate;
a display section that is on the pixel substrate and has a plurality of pixel electrodes;
a plurality of drive electrodes on the pixel substrate, the drive electrodes extending in a first direction and being arranged side-by-side in a second direction,
a electrode pattern on the opposed substrate;
an image signal wiring and a drive signal wiring on the pixel substrate, the image signal wiring extending in the second direction and supplying the pixel electrodes with an image signal, and the drive signal wiring supplying the drive electrodes with a drive signal,
wherein
each of the drive electrodes having a width in the second direction corresponding to a size of two or more of the pixel electrodes, and having one or more inner-electrode slits extending in the first direction,
the drive electrodes are disposed nearer to the opposed substrate than the image signal wiring in the pixel substrate,
the inner-electrode slit is discontinued by non-slit portions of the drive electrode, and
the non-slit portions are disposed at an intersection, as viewed from the opposed substrate, of the inner-electrode slit and the image signal wiring.
10. The display device according to claim 9 , wherein:
each of the drive electrodes has a length in the first direction larger than that of an effective display region in the display section, and
the inner-electrode slit is provided at least in the effective display region.
11. The display device according to claim 9 , wherein a spacing in the second direction between the inner-electrode slits adjacent to each other has a size corresponding to a single pixel electrode.
12. The display device according to claim 9 , wherein each of the inner-electrode slits is provided between the pixel electrodes adjacent to each other.
13. The display device according to claim 9 , wherein a spacing in the second direction between the inner-electrode slits adjacent to each other has dimensions of about 500 micrometers or less.
14. The display device according to claim 9 , wherein a spacing in the second direction between the inner-electrode slits adjacent to each other has dimensions of about 300 micrometers or less.
15. The display device according to claim 9 , wherein the electrode pattern is a plurality of touch detection electrodes that output a detection signal in response to the drive signal applied to the drive electrodes.