WE CLAIM:
1. An organic EL display device comprising:
a photosensitive resin composition comprising an (A) alkali-soluble resin, a (B) coloring agent, a (C) radical polymerizable compound, and a (D) photopolymerization initiator,
wherein the (A) alkali-soluble resin is an (A-1) alkali-soluble resin having a carboxy group;
further a sum of content of at least one of a metal element and a halogen element in a non-volatile component measured by time-of-flight secondary ion mass spectrometry in a cured product formed by curing the photosensitive resin composition is 1 x 1017 atom/cm3 or larger and 1 x 1022 atom/cm3 or smaller; and
in an organic EL element constituted of at least a substrate, a first electrode, a second electrode, a light emitting pixel, a flattening layer, and a pixel division layer, the photosensitive resin composition is arranged in at least one of the flattening layer and the pixel division layer.
2. The organic EL display device according to claim 1, wherein at least one of the metal element and the halogen element is an ionic compound.
3. The organic EL display device according to claim 1, wherein a carboxylic acid equivalent of the (A-1) alkali-soluble resin having the carboxy group is 400 g/mol or higher and 800 g/mol or lower.
4. The organic EL display device according to any one of claims 1 to 3, wherein a carboxylic acid equivalent of the (A-1) alkali-soluble resin having the carboxy group is 500

g/mol or higher and 600 g/mol or lower.
5. The organic EL display device according to any one of
claims 1 to 4, wherein the (A) alkali-soluble resin
includes the (A-1) alkali-soluble resin having the carboxy
group and an (A-2) alkali-soluble resin having a phenolic
hydroxy group; and
a ratio of the (A-1) alkali-soluble resin having the carboxy group included in 100% by weight of a total of the (A-1) alkali-soluble resin having the carboxy group and the (A-2) alkali-soluble resin having the phenolic hydroxy group is in a range of 5% by weight to 40% by weight.
6. The organic EL display device according to any one of claims 1 to 5, wherein a cured film has an OD per 1 m of the cured film of 1.5 or higher.
7. The organic EL display device according to any one of claims 1 to 5, wherein a cured film has an OD per 1 pm of the cured film of 1.0 or higher.
8. The organic EL display device according to any one of claims 1 to 4, wherein the (A-1) alkali-soluble resin having the carboxy group further includes an (A-3) alkali-soluble resin having at least one of an amino group and an amide group.
9. The organic EL display device according to any one of claims 1 to 8, wherein the (A-1) alkali-soluble resin having the carboxy group is an (A-1a) acrylic resin or an
(A-1b) cardo-based resin.
10. The organic EL display device according to any one of

claims 1 to 8, wherein the (A-1) alkali-soluble resin having the carboxy group is an (A-1b) cardo-based resin.
11. The organic EL display device according to any one of
claims 5 to 10, wherein the (A) alkali-soluble resin
includes the (A-1) alkali-soluble resin having the carboxy
group and the (A-2) alkali-soluble resin having the
phenolic hydroxy group; and
the (A-2) alkali-soluble resin having the phenolic hydroxy group is an (A-1c) polyimide resin and an (A-1d) polybenzoxazole resin.
12. The organic EL display device according to any one of
claims 5 to 11, wherein the (A) alkali-soluble resin
includes the (A-1) alkali-soluble resin having the carboxy
group and the (A-2) alkali-soluble resin having the
phenolic hydroxy group; and
a ratio of the (A-1) alkali-soluble resin having the carboxy group included in 100% by weight of a total of the (A-1) alkali-soluble resin having the carboxy group and the (A-2) alkali-soluble resin having the phenolic hydroxy group is in a range of 5% by weight to 10% by weight.
13. The organic EL display device according to any one of claims 1 to 12, wherein a pixel division layer opening ratio in a display area is 20% or lower.
14. The organic EL display device according to any one of claims 1 to 13, wherein the metal element is an alkali metal element or an alkaline earth metal element.
15. The organic EL display device according to claim 14, wherein the metal element is the alkali metal element.

16. The organic EL display device according to claim 15, wherein the metal element is at least one of sodium and potassium.
17. The organic EL display device according to any one of claims 1 to 13, wherein the halogen element is chlorine.
18. The organic EL display device according to any one of claims 1 to 17, wherein a sum of content of at least one of a metal element and a halogen element in a non-volatile component measured by time-of-flight secondary ion mass spectrometry in the photosensitive resin composition is 1 x 1017 atom/cm3 or larger and 1 x 1020 atom/cm3 or smaller.
19. The organic EL display device according to any one of claims 1 to 18, wherein the (B) coloring agent is an (B-1) organic pigment.
20. The organic EL display device according to any one of claims 1 to 19, wherein the (B-1) organic pigment includes at least one of a (B-2) acid-treated carbon black and a (B-3) benzofuranone-based organic pigment having an amide structure.
21. The organic EL display device according to claim 20, wherein the (B-3) benzofuranone-based organic pigment having the amide structure is a compound represented by the following general formula (11):

in the general formula (11), R101 and R102 each independently represent hydrogen, a halogen atom, an alkyl group having a carbon number of 1 to 10, or an alkyl group having a carbon number of 1 to 10 having 1 to 20 fluorine atoms; R104 to R107 and R109 to R112 each independently represent hydrogen, a halogen atom, an alkyl group having a carbon number of 1 to 10, a carboxy group, a sulfonic acid group, an amino group, or a nitro group; and R103 and R108 each independently represent hydrogen, an alkyl group having a carbon number of 1 to 10, or an aryl group having a carbon number of 6 to 15.