Light-emitting device and display device including the same

1 . A light-emitting device, comprising:

a substrate;

a light-emitting element disposed on the substrate; and

a light-transmissive encapsulant disposed on the substrate and surrounding the light-emitting element, wherein the light-transmissive encapsulant has an upper surface and a bottom surface, the bottom surface has a first width, and the light-transmissive encapsulant comprises:

a recessed portion located on the upper surface and directly above the light-emitting element and comprising a bottom portion and a sidewall surrounding the bottom portion; and

a surrounding portion located on the upper surface, connected to the sidewall of the recessed portion, and extending outward to the bottom surface, wherein a ratio of a second width of the bottom portion to a third width of the light-emitting element is greater than or equal to 0.3,

wherein a light pattern emitted by the light-emitting element has a batwing-shaped light distribution,

further comprising an optical film disposed between the light-emitting element and the light-transmissive encapsulant,

wherein the recessed portion exposes an upper surface of the optical film.

2 . The light-emitting device as claimed in claim 1 , wherein a ratio of the second width to the first width is less than or equal to 0.5.

3 . The light-emitting device as claimed in claim 1 , wherein a ratio of the first width to the third width is greater than or equal to 1.5 and less than 5.

4 . The light-emitting device as claimed in claim 1 , wherein an optical axis parallel to a normal direction of the substrate passes through a center of the recessed portion and intersects the bottom surface at a reference point, and the surrounding portion comprises a curved surface with a highest point, and a first height is between the highest point and the bottom surface.

5 . The light-emitting device as claimed in claim 4 , wherein a ratio of the first height to a height of the light-emitting element is greater than 1.1 and less than 3.

6 . The light-emitting device as claimed in claim 4 , wherein a ratio of the first height to the first width of the bottom surface is less than or equal to 0.5.

7 . The light-emitting device as claimed in claim 4 , wherein a ratio of a depth of the recessed portion to the first height is greater than or equal to 0.05 and less than or equal to 0.5.

8 . The light-emitting device as claimed in claim 4 , wherein a virtual connection line connects the reference point and the highest point of the curved surface of the surrounding portion, and a first angle between the virtual connection line and the optical axis is greater than 10 degrees and less than 60 degrees.

9 . The light-emitting device as claimed in claim 4 , wherein a first point is located on the sidewall of the recessed portion, a second point is located on the curved surface of the surrounding portion, and the first point and the second point are located on opposite sides of the highest point.

10 . The light-emitting device as claimed in claim 1 , wherein the light-transmissive encapsulant comprises:

a first portion; and

a second portion surrounding the first portion, wherein the recessed portion is disposed on the first portion and the second portion,

wherein a height of the second portion gradually increases in a direction away from an optical axis which is parallel to a normal direction of the substrate and passes through a center of the recessed portion.

11 . The light-emitting device as claimed in claim 10 , wherein the light-transmissive encapsulant further comprises:

a third portion surrounding the second portion,

wherein a height of the third portion gradually decreases in the direction away from the optical axis.

12 . The light-emitting device as claimed in claim 1 , wherein the optical film comprises a reflective material.

13 . The light-emitting device as claimed in claim 1 , wherein the bottom portion and the sidewall of the recessed portion together define a recessed opening, and a size of the recessed opening increases along a normal direction of the substrate.

14 . A display device, comprising:

a light-emitting device as claimed in claim 1 ; and

an optical layer disposed above the light-emitting device.