Active-matrix display device including TFT substrate with two layers arranged in symmetry with same-colored subpixels
An active-matrix display device includes pixels arranged in a matrix, and each of the pixels includes subpixels that are arranged along an X direction and emit light of mutually different colors. Each of the subpixels includes a TFT element provided on a TFT substrate and an organic EL element provided on the TFT substrate. The organic EL element has an opening which is a region from which emitted light exits, and the TFT substrate includes a first layer and a second layer. When same-colored subpixels of two of the pixels adjacent in the X direction are seen in a plan view, the first layer has a portion arranged in line symmetry between the same-colored subpixels and the second layer is disposed at an identical position in the openings of the same-colored subpixels.
1. An active-matrix display device, comprising:
a plurality of pixels arranged in a matrix,
wherein each of the plurality of pixels includes a plurality of subpixels that are arranged along a predetermined direction and emit light of mutually different colors,
each of the plurality of subpixels includes:
a TFT element provided on a TFT substrate; and
a light-emitting element that is provided on the TFT substrate and emits light according to driving by the TFT element,
the light-emitting element has an opening which is a region from which emitted light exits,
the TFT substrate includes a first layer and a second layer, and
when same-colored subpixels that emit light of a same color out of the plurality of subpixels included in two of the plurality of pixels that are adjacent in the predetermined direction are seen from a thickness direction of the TFT substrate:
the first layer has a portion arranged in line reflection symmetry between the same-colored subpixels; and
the second layer is disposed at an identical position in respective openings of the same-colored subpixels.
2. The active-matrix display device according to claim 1 , further comprising:
a power supply line that supplies power to each of the plurality of subpixels,
wherein the power supply line extends along a direction orthogonal to the predetermined direction and is shared by the plurality of subpixels that are adjacent in the predetermined direction.
3. The active-matrix display device according to claim 1 ,
wherein, in the thickness direction of the TFT substrate, the second layer is disposed closer to the light-emitting element than the first layer is.
4. The active-matrix display device according to claim 1 ,
wherein the second layer includes one of a power supply line that supplies power to the plurality of subpixels and a signal line that supplies signal voltage to the plurality of subpixels.
5. The active-matrix display device according to claim 1 ,
wherein the second layer includes a contact layer that connects a metal layer and a layer different from the metal layer, the metal layer including one of a power supply line that supplies power to the plurality of subpixels and a signal line that supplies signal voltage to the plurality of subpixels.
6. The active-matrix display device according to claim 5 ,
wherein the TFT substrate includes a substrate, a first insulating layer, a second insulating layer, and a third insulating layer,
the first layer includes a lower line layer and an upper line layer,
the second layer includes the metal layer and the contact layer,
the lower line layer is provided on the substrate,
the first insulating layer is provided on the substrate to cover the lower line layer,
the upper line layer is provided on the first insulating layer,
the second insulating layer is provided on the first insulating layer to cover the upper line layer,
the metal layer is provided on the second insulating layer,
the contact layer includes:
a layer that is in contact with the upper line layer, penetrates through the second insulating layer, and is connected to the metal layer; and
a layer that is in contact with the lower line layer, penetrates through the first insulating layer and the second insulating layer, and is connected to the metal layer, and
the third insulating layer is provided on the second insulating layer to cover the metal layer and the contact layer.
7. The active-matrix display device according to claim 6 ,
wherein the lower line layer includes a channel of the TFT element, and
the upper line layer includes a gate of the TFT element.
8. The active-matrix display device according to claim 6 ,
wherein each of the plurality of subpixels further includes a capacitor connected to the TFT element,
the capacitor has a first electrode and a second electrode disposed at opposing positions,
the lower line layer includes the first electrode, and
the upper line layer includes the second electrode.