A display device (1,3, 9, 10) comprising: a first display substrate comprising: a base portion including a pixel area that includes a light-transmitting area and a light-blocking area; a colour filter disposed on the light-transmitting area of the base portion wherein the colour filter includes a first colour pigment; a projection portion disposed in the light-blocking area of the base portion, the projection portion including a first sub-colour filter and a second sub-colour filter overlapping the first sub-colour filter over an overlap area; and a light-blocking member disposed on the projection portion and overlapping the base portion, the light-blocking member including a spacing member, the spacing member being made of the same material as the light-blocking member and overlapping the projection portion, wherein the first sub-colour filter includes a first colour pigment, the second sub-colour filter includes a second colour pigment different from the first colour pigment, characterised in that: the width of the first sub-colour filter in a first direction is smaller than the width of the second sub-colour filter in the first direction, and the width of the first sub-colour filter in a second direction is larger than the width of the second sub-colour filter in the second direction, wherein the second direction is a direction intersecting the first direction, and wherein the maximum width of the overlap area in the first direction is substantially equal to the width of the first sub-colour filter in the first direction, the maximum width of the overlap area in the second direction is substantially equal to the width of the second sub-colour filter in the second direction, and wherein the first sub-colour filter is connected to the colour filter. a base portion including a pixel area that includes a light-transmitting area and a light-blocking area; a colour filter disposed on the light-transmitting area of the base portion wherein the colour filter includes a first colour pigment; a projection portion disposed in the light-blocking area of the base portion, the projection portion including a first sub-colour filter and a second sub-colour filter overlapping the first sub-colour filter over an overlap area; and a light-blocking member disposed on the projection portion and overlapping the base portion, the light-blocking member including a spacing member, the spacing member being made of the same material as the light-blocking member and overlapping the projection portion, wherein the first sub-colour filter includes a first colour pigment, the second sub-colour filter includes a second colour pigment different from the first colour pigment, the width of the first sub-colour filter in a first direction is smaller than the width of the second sub-colour filter in the first direction, and the width of the first sub-colour filter in a second direction is larger than the width of the second sub-colour filter in the second direction, wherein the second direction is a direction intersecting the first direction, and wherein the maximum width of the overlap area in the first direction is substantially equal to the width of the first sub-colour filter in the first direction, the maximum width of the overlap area in the second direction is substantially equal to the width of the second sub-colour filter in the second direction, and wherein the first sub-colour filter is connected to the colour filter.