Light-emitting module and display device

Abstract

This application provides a light-emitting module, comprising: a plurality of first light-emitting components and a plurality of second light-emitting components spaced apart on a substrate, each first light-emitting component emitting a first light and each second light-emitting component emitting a second light; a plurality of first microlens structures and a plurality of second microlens structures disposed on the substrate, each first microlens structure completely covering a corresponding first light-emitting component and each second microlens structure completely covering a corresponding second light-emitting component; the first light and the second light are mixed after being transmitted through the first microlens structures and the second microlens structures respectively to form mixed light; the first microlens structures and the second microlens structures are respectively used to transmit and change the emission angle of the first light and the second light. This application also provides a display device.

Claims

1. A light-emitting module, the improvement of which is that it includes: substrate; A plurality of first light-emitting components and a plurality of second light-emitting components are spaced apart on the substrate. Each first light-emitting component emits a first light, and each second light-emitting component emits a second light. The first light and the second light are of different colors. A plurality of first microlens structures and a plurality of second microlens structures are also disposed on the substrate. Each of the first microlens structures corresponds one-to-one with each of the first light-emitting components, and each of the second microlens structures corresponds one-to-one with each of the second light-emitting components. Each first microlens structure completely covers its corresponding first light-emitting component, and each second microlens structure completely covers its corresponding second light-emitting component. The first light and the second light are transmitted through the first microlens structure and the second microlens structure, respectively, and then mixed to form mixed light. The first light has a first light intensity percentage in the mixed light, and the second light has a second light intensity percentage in the mixed light. The first microlens structure and the second microlens structure are used to transmit and change the emission angles of the first light and the second light, respectively, so that the first light intensity percentage and the second light intensity percentage remain constant. Each of the first microlens structures includes a first planar layer and a first spherical lens layer interconnected. The first planar layer completely covers the first light-emitting component. The first spherical lens layer is located on the side of the first planar layer away from the substrate, and the optical axis of the first spherical lens layer coincides with the light-emitting center of the first light-emitting component. Each of the second microlens structures includes a second planar layer and a second spherical lens layer interconnected. The second planar layer completely covers the second light-emitting component. The second spherical lens layer is located on the side of the second planar layer away from the substrate, and the optical axis of the second spherical lens layer coincides with the light-emitting center of the second light-emitting component. The light-emitting module satisfies the following relationship: ; where D is the width of the connection between the first spherical lens layer and the first planar layer or the width of the connection between the second spherical lens layer and the second planar layer in a direction parallel to the bearing surface of the substrate, L is the thickness of the first planar layer or the second planar layer in a direction perpendicular to the bearing surface of the substrate, and θ is half the emission angle of the first light before transmission through the first microlens structure or the emission angle of the second light before transmission through the second microlens structure.

2. The light-emitting module as described in claim 1, wherein, The light-emitting surface of each of the first microlens structures and the light-emitting surface of each of the second microlens structures are spherical, and the light-emitting surface of each of the first microlens structures is curved away from the first light-emitting component, and the light-emitting surface of each of the second microlens structures is curved away from the second light-emitting component.

3. The light-emitting module as described in claim 2, wherein, The curvature of the light-emitting surface of each of the first microlens structures is different from the curvature of the light-emitting surface of each of the second microlens structures.

4. The light-emitting module as described in claim 1, wherein, Along a direction perpendicular to the bearing surface of the substrate, the height of each first microlens structure is different from the height of each second microlens structure.

5. The light-emitting module as described in claim 1, wherein, The optical axis of each of the first microlens structures coincides with the light-emitting center of the corresponding first light-emitting component, and the optical axis of each of the second microlens structures coincides with the light-emitting center of the corresponding second light-emitting component.

6. The light-emitting module as described in claim 1, wherein, The light-emitting module satisfies the following relationship: ; where f is the focal length of the spherical lens corresponding to the first spherical lens layer or the second spherical lens layer, n1 is the refractive index of the first microlens structure or the second microlens structure, n2 is the refractive index of the medium outside the light-emitting module, R is the radius of the spherical lens corresponding to the first spherical lens layer or the second spherical lens layer, and H is the thickness of the first spherical lens layer or the second spherical lens layer at its thickest point along the direction perpendicular to the bearing surface of the substrate.

7. The light-emitting module as described in claim 6, wherein, The light-emitting module satisfies the following relationship: .

8. A display device, improved in that it comprises: The light-emitting module as described in any one of claims 1 to 7 is used to emit mixed light; And a driving circuit, electrically connected to a plurality of first light-emitting components and a plurality of second light-emitting components in the light-emitting module, for controlling the opening or closing of the plurality of first light-emitting components and the plurality of second light-emitting components.

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