Housing for optical proximity sensor

• US 8,841,597 B2
• Filed: 12/27/2010
• Issued: 09/23/2014
• Est. Priority Date: 12/27/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies Wireless IP Singapore Pte Limited (Broadcom, Inc.)
• Inventors: Costello, James, Tan, Wee Sin, Lee, Kai Koon, Saravanan, Rani
• Primary Examiner(s): LEE, JOHN R
• Application Number:
  US12/979,071
• Publication Number:
  US 20120160994A1
• Time in Patent Office: 1,366 Days
• Field of Search: 250/221, 250/222.1, 250/239, 250/338.1, 250/338.4, 250/340, 250/341.1, 250/336.1, 257/723, 257/724, 257/678, 345/175, 345/173, 178/18.01, 178/18.03, 178/18.09
• US Class Current: 250/221
• CPC Class Codes: G01D 11/245 Housings for sensors

Abstract

An optical proximity sensor and housing for the same are disclosed. The housing is provided with at least two support structures and at least two modules. A first of the support structures transfers vertical forces applied to one end of a module to an opposite end of the opposite module. A second of the support structures inhibits a pivoting of the modules about the first support structure.

Claims

1. An optical proximity sensor, comprising:

a light source;

a light detector;

a substrate upon which the light source and light detector are mounted; and

a housing, comprising;

a first module comprising a first aperture and comprising a cavity to receive the light source;

a second module comprising a second aperture and comprising a cavity to receive the light detector;

a first support feature provided between the first module and second module, the first support feature providing an interface between the housing and the substrate and being configured to enable the first and second module to pivot relative to the substrate by transferring a vertical force applied to the second module to the first module; and

a second support feature provided in the cavity of at least one of the first and second modules, the second support feature configured to counteract the pivot motion enabled by the first support feature, thereby minimizing tilting of the housing relative to the substrate.

2. The optical proximity sensor of claim 1, wherein the housing is constructed of a single piece of material.

3. The optical proximity sensor of claim 2, wherein the single piece of material comprises at least one of a metal and metal alloy.

4. The optical proximity sensor of claim 2, wherein the single piece of material comprises a non-metal.

5. The optical proximity sensor of claim 1, wherein the first support feature comprises at least one tab foldably disposed between the first module and second module.

6. The optical proximity sensor of claim 1, wherein the second support feature is a folded tab provided in the cavity of the second module.

7. The optical proximity sensor of claim 1, wherein the second module comprises an inner sidewall, two lateral sidewalls adjacent to the inner sidewall, and an outer sidewall, wherein each of the sidewalls comprise one or more tabs which extend from an outer surface of the second module and are folded toward the cavity of the second module.

8. The optical proximity sensor of claim 7, wherein the second support feature comprises one or more foldable tabs included in the outer sidewall.

9. The optical proximity sensor of claim 7, wherein the outer sidewall comprises at least one bottom tab portion and at least one top tab portion, wherein the at least one bottom tab portion comprises a foldable extension of at least one of the two lateral sidewalls, wherein the second support feature comprises a foldable extension of the at least one bottom tab portion, and wherein the at least one top tab portion extends from the outer surface of the second module that opposes the cavity of the second module.

10. The optical proximity sensor of claim 9, wherein the outer sidewall comprises a gap between the at least one top tab portion and at least one bottom tab portion.

11. The optical proximity sensor of claim 1, wherein the first and second modules comprise optically opaque inner sidewalls to provide optical isolation between the first and second modules.

12. The optical proximity sensor of claim 1, further comprising:

a light source driver circuit operably connected to and driving the light source, wherein the light source driver circuit is mounted on the substrate and is received by the first module; and

a detector sensing circuit operably connected to and driving the light detector, wherein the detector sensing circuit is mounted on the substrate and is received by the second module.

18. The optical proximity sensor of claim 1, wherein the second support feature inhibits the pivoting motion.

13. A housing for an optical proximity sensor having a substrate upon which a light source and light detector are mounted, the housing comprising:

a first module comprising a first aperture and a cavity configured to receive a light source;

a second module comprising a second aperture and a cavity configured to receive a light detector;

a first support feature provided between the first module and second module, the first support feature configured to interface with a substrate and transfer vertical forces applied to the second module to the first module thereby enabling a pivoting motion of the first and second module relative to the substrate; and

a second support feature provided in the cavity of at least one of the first and second modules, the second support feature configured to counteract the pivoting motion enabled by the first support feature, thereby minimizing tilting of the first and second modules about the substrate.

14. The housing of claim 13, the second support feature inhibits the pivoting motion.

15. The housing of claim 13, wherein the first module is connected to the second module via the first support feature.

16. The housing of claim 15, wherein the first support feature comprises a plurality of tabs that are folded and separate the first and second modules so as to substantially inhibit optical cross-talk between the first and second modules.

17. The housing of claim 16, wherein the housing is constructed from a single piece of an optically opaque material.

19. The housing of claim 13, wherein the second module comprises an inner sidewall, two lateral sidewalls adjacent to the inner sidewall, and an outer sidewall, wherein each of the sidewalls comprise one or more tabs which extend from an outer surface of the second module and are folded toward the cavity of the second module.

20. The housing of claim 19, wherein the outer sidewall comprises at least one bottom tab portion and at least one top tab portion, wherein the at least one bottom tab portion comprises a foldable extension of at least one of the two lateral sidewalls, wherein the second support feature comprises a foldable extension of the at least one bottom tab portion, and wherein the at least one top tab portion extends from the outer surface of the second module toward the cavity of the second module.