CN-122017799-A - Optical sensor and electronic device

CN122017799ACN 122017799 ACN122017799 ACN 122017799ACN-122017799-A

Abstract

The application discloses an optical sensor and electronic equipment, which can solve the problem of light crosstalk caused by direct leakage of light emitted by a light emitter to a light receiver, and simplify the manufacturing process of the optical sensor. The optical sensor includes a substrate, an optical emitter, an optical receiver, an encapsulation layer, and an optical absorption coating. The substrate includes a first surface. The light emitter is located on the first surface. The light receiver is located on the first surface and spaced from the light emitter. The encapsulation layer covers the light emitter, the light receiver and the substrate and comprises a second surface facing away from the substrate. Wherein an orthographic projection of at least a portion of the light absorbing coating on the substrate is positioned between the light emitter and the light receiver.

Inventors

SHAO MINGTIAN
Zou Renting
Liu Wuzi
ZHANG YUWEI

Assignees

武汉聚芯微电子股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (11)

1. An optical sensor is provided, which is used for detecting the position of a light source, characterized by comprising the following steps: A substrate including a first surface; a light emitter located on the first surface; an optical receiver located on the first surface and spaced from the optical transmitter; an encapsulation layer covering the light emitter, the light receiver and the substrate and including a second surface facing away from the substrate, and And a light absorbing coating on at least one of the first surface and the second surface, wherein an orthographic projection of at least a portion of the light absorbing coating on the substrate is located between the light emitter and the light receiver.
2. The optical sensor of claim 1, wherein the light absorbing coating comprises a first light absorbing coating and a second light absorbing coating; the first light absorbing coating is located on the first surface, at least a portion of the first light absorbing coating being located between the light emitter and the light receiver; The second light absorbing coating is located on the second surface, and an orthographic projection of at least a portion of the second light absorbing coating on the substrate is located between the light emitter and the light receiver.
3. The optical sensor of claim 2, wherein the orthographic projection of the second light absorbing coating on the substrate overlaps the orthographic projection of the first light absorbing coating on the substrate.
4. The optical sensor of claim 2, wherein the optical transmitter includes a first device top surface facing away from the substrate, the optical receiver includes a second device top surface facing away from the substrate, and the first device top surface and the second device top surface are each a distance from the substrate that is greater than the thickness of the first light absorbing coating.
5. The optical sensor of claim 2, further comprising a first anti-reflective structure, at least one of the first anti-reflective structures being located in the first light absorbing coating.
6. The optical sensor of claim 2, further comprising a second anti-reflective structure, at least one of the second anti-reflective structures being located between the substrate and the second light absorbing coating and in contact with the second light absorbing coating.
7. The optical sensor of claim 6, wherein the second anti-reflective structure is located in at least one of the encapsulation layer and the second light absorbing coating.
8. The optical sensor of claim 2, wherein the first light absorbing coating comprises oppositely disposed first and second sides, the first side being on a side of the first light absorbing coating adjacent the light emitter and the second side being on a side of the first light absorbing coating adjacent the light receiver; The second light absorbing coating comprises a third side surface and a fourth side surface which are oppositely arranged, the third side surface is positioned at one side of the second light absorbing coating close to the light emitter, and the fourth side surface is positioned at one side of the second light absorbing coating close to the light receiver; wherein the orthographic projection of the third side surface on the substrate is positioned on one side of the orthographic projection of the first side surface on the substrate, which is close to the light receiver, and/or the orthographic projection of the fourth side surface on the substrate is positioned on one side of the orthographic projection of the second side surface on the substrate, which is close to the light transmitter.
9. The optical sensor of claim 2, wherein the first light absorbing coating and the second light absorbing coating each comprise a black ink layer, and/or, The distance between the light emitter and the light receiver is 0.5-2 mm.
10. An optical sensor is provided, which is used for detecting the position of a light source, characterized by comprising the following steps: A substrate including a first surface; a light emitter located on the first surface; an optical receiver located on the first surface and spaced from the optical transmitter; an encapsulation layer covering the light emitter, the light receiver and the substrate and including a second surface facing away from the substrate, and And the orthographic projection of at least part of the light absorption layer on the substrate is positioned between the light emitter and the light receiver.
11. An electronic device comprising the optical sensor of any one of claims 1 to 9, or the optical sensor of claim 10.

Description

Optical sensor and electronic device Technical Field The present application relates to the field of technologies, and in particular, to an optical sensor and an electronic device. Background Optical tracking sensors typically consist of an optical transmitter and an optical receiver that work together to effect the transmission and reception of optical information of a target. In order to suppress the crosstalk caused by the direct leakage of the emitted light to the light receiver, a wall structure is generally provided between the light emitter and the light receiver. However, the manufacturing of the retaining wall structure has a problem of complicated process. Disclosure of Invention The embodiment of the application provides an optical sensor and electronic equipment, which are used for at least partially solving the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided an optical sensor including a substrate, an optical emitter, an optical receiver, an encapsulation layer, and an optical absorption coating layer. The substrate includes a first surface. The light emitter is located on the first surface. The light receiver is located on the first surface and spaced from the light emitter. The encapsulation layer covers the optical transmitter, the optical receiver and the substrate and includes a second surface facing away from the substrate. The light absorbing coating is positioned on at least one of the first surface and the second surface, wherein an orthographic projection of at least a portion of the light absorbing coating on the substrate is positioned between the light emitter and the light receiver. According to a second aspect of the present application, there is also provided an optical sensor comprising a substrate, an optical emitter, an optical receiver, an encapsulation layer, and an optical absorption layer. The substrate includes a first surface. The light emitter is located on the first surface. The light receiver is located on the first surface and spaced from the light emitter. The encapsulation layer covers the optical transmitter, the optical receiver and the substrate and includes a second surface facing away from the substrate. The light absorbing layer is positioned on the second surface, and the orthographic projection of at least part of the light absorbing layer on the substrate is positioned between the light emitter and the light receiver. According to a third aspect of the application, there is provided an electronic device comprising the optical sensor of any of the embodiments described above. In the optical sensor and the electronic device, the light absorbing coating is positioned on at least one of the first surface and the second surface, wherein the orthographic projection of at least part of the light absorbing coating on the substrate is positioned between the light emitter and the light receiver. By adopting the design, when the light emitter emits the large-angle emitted light in the packaging layer between the light emitter and the light receiver and reflects the large-angle emitted light on the first surface and the second surface, the light absorption coating can absorb the large-angle emitted light, so that the risk of light crosstalk caused by the fact that the large-angle emitted light is directly received by the light receiver after being reflected by the packaging layer and/or the substrate is reduced. And the light-absorbing coating can be formed through a coating or printing process, so that the manufacturing process of the light-absorbing coating is simplified to simplify the manufacturing process of the optical sensor, the distance between the light emitter and the light receiver is reduced, and the problem that effective light received by the light receiver is reduced due to overlarge distance between the light emitter and the light receiver is solved. Drawings FIG. 1 is a schematic cross-sectional view of an optical sensor provided in an exemplary embodiment of the present application; FIG. 2 is another cross-sectional structural view of an optical sensor provided in an exemplary embodiment of the present application; FIG. 3 is a further cross-sectional structural view of an optical sensor provided in an exemplary embodiment of the present application; FIG. 4 is a further cross-sectional structural view of an optical sensor provided in an exemplary embodiment of the present application; FIG. 5 is a further cross-sectional structural view of an optical sensor provided in an exemplary embodiment of the present application; FIG. 6 is a plan view block diagram of the optical sensor of FIG. 5 provided in an exemplary embodiment of the present application; Fig. 7 is a cross-sectional structural view of still another optical sensor provided in an exemplary embodiment of the present application. Reference numerals illustrate: 100. an optical sensor; 1. a substrate, 11, a first