Light-sensing device
A light-sensing device comprises a substrate, multiple first working light-sensing elements, multiple second working light-sensing elements, multiple third working light-sensing elements, multiple first reference light-sensing elements, multiple second reference light-sensing elements, multiple third reference light-sensing elements, a first processing element, and a second processing element. The substrate has a first working area, a second working area, a third working area, a first reference area, a second reference area, and a third reference area. The multiple first working light-sensing elements, the multiple second working light-sensing elements, and the multiple third working light-sensing elements are respectively disposed in the first working area, the second working area, and the third working area. The multiple first reference light-sensing elements, the multiple second reference light-sensing elements, and the multiple third reference light-sensing elements are respectively disposed in the first reference area, the second reference area, and the third reference area.
1 . A light-sensing device, comprising:
a substrate, having a working area and a reference area outside the working area; and
a plurality of light-sensing elements, wherein each light-sensing element comprises a reading circuit, a first electrode electrically connected to the reading circuit, a light-sensing pattern disposed on the first electrode, a second electrode disposed on the light-sensing pattern, and a first light-blocking structure disposed on the second electrode;
the light-sensing elements comprise a plurality of working light-sensing elements and a plurality of reference light-sensing elements, wherein the working light-sensing elements are disposed in the working area of the substrate, and the reference light-sensing elements are disposed in the reference area of the substrate;
the first light-blocking structure of each working light-sensing element has a light-transmitting opening overlapping the light-sensing pattern of the working light-sensing element;
the first light-blocking structure of each reference light-sensing element shields the light-sensing pattern of the reference light-sensing element;
each reference light-sensing element further comprises a second light-blocking structure, wherein the first light-blocking structure and the second light-blocking structure of each reference light-sensing elements are respectively disposed on upper and lower sides of the light-sensing pattern of the reference light-sensing element, and a vertical projection of the light-sensing pattern of the reference light-sensing element on the substrate falls within a vertical projection of the second light-blocking structure of the reference light-sensing element on the substrate.
2 . The light-sensing device according to claim 1 , wherein the second light-blocking structure of the reference light-sensing element is disposed between a semiconductor pattern of the reference light-sensing element and the substrate, and the second light-blocking structure of the reference light-sensing element overlaps the semiconductor pattern of the reference light-sensing element and the light-sensing pattern of the reference light-sensing element in a direction perpendicular to the substrate.
3 . The light-sensing device according to claim 1 , wherein the second light-blocking structure of each reference light-sensing element comprises:
a bottom light-shielding pattern, disposed on the substrate; and
a first conductive pattern, disposed above the bottom light-shielding pattern, wherein the bottom light-shielding pattern has an opening, and the first conductive pattern covers the opening of the bottom light-shielding pattern.
4 . The light-sensing device according to claim 3 , wherein an edge of the first conductive pattern and an edge of the opening of the bottom light-shielding pattern are substantially aligned.
5 . The light-sensing device according to claim 3 , wherein each light-sensing element further comprises:
a shielding layer, disposed on the first light-blocking structure of the light-sensing element, wherein the first light-blocking structure is disposed between the shielding layer and the light-sensing pattern, and the shielding layer has an opening overlapping the light-sensing pattern;
the opening of the shielding layer of each reference light-sensing element and the second light-blocking structure of the reference light-sensing element are overlapped.
6 . The light-sensing device according to claim 5 , wherein the opening of the bottom light-shielding pattern of each reference light-sensing element and the opening of the shielding layer of the reference light-sensing element are overlapped.
7 . The light-sensing device according to claim 1 , wherein each light-sensing element further comprises:
a shielding layer, disposed on the first light-blocking structure of the light-sensing element, wherein the first light-blocking structure is disposed between a shielding layer and the light-sensing pattern of the light-sensing element, and the shielding layer has an opening overlapping the light-sensing pattern of the light-sensing element;
the opening of the shielding layer of each reference light-sensing element and the second light-blocking structure of the reference light-sensing element are overlapped.
8 . The light-sensing device according to claim 1 , wherein each light-sensing element further comprises:
a passivation layer, disposed on the light-sensing pattern of the light-sensing element, and having a contact window, wherein the second electrode of each light-sensing element is electrically connected to the light-sensing pattern through the contact window of the passivation layer;
the passivation layer of one of the reference light-sensing elements further has a groove, the groove is located beside the light-sensing pattern of the one of the reference light-sensing elements, and the first light-blocking structure of the one of the reference light-sensing elements is filled into the groove.
9 . The light-sensing device according to claim 8 , wherein the groove surrounds the light-sensing pattern of the one of the reference light-sensing elements.
10 . The light-sensing device according to claim 8 , wherein the groove is disposed beside a single side of the light-sensing pattern of the one of the reference light-sensing elements.