Motion-detecting module
A motion-detecting module includes a PCB, a light-emitting unit, and a light-sensing unit. The light-emitting unit is electrically disposed over the PCB. The light-sensing unit has a light-sensing die electrically disposed on the PCB and a package cover covered on the light-sensing die, and the package cover has a through hole corresponding to the light-sensing die and a transparent element disposed in the through hole. The present invention does not need extra package protection body of the prior art for protecting the light-sensing die during the transport of the light-sensing module. The present invention use original package cover to prevent the light-sensing die from being damaged by external force, and the original package cover shelters the light-sensing die from extra stray light.
1. A motion-detecting module, comprising:
a PCB;
a light-emitting unit electrically disposed over the PCB, the light-emitting unit includes a light-emitting die mounted to the PCB and electrically coupled thereto by a pair of leads, the light-emitting die and pair of leads being encapsulated by a material having a contour to form a lens; and
a light-sensing unit having a light-sensing die electrically disposed on the PCB and a package cover covered on the light-sensing die, wherein the package cover has a through hole corresponding to the light-sensing die, a transparent element disposed in the through hole and an imaging lens overlaying the hole.
2. The motion-detecting module as claimed in claim 1 , wherein the light-emitting die provides a coherent illumination.
3. The motion-detecting module as claimed in claim 1 , wherein the package cover is opaque.
4. The motion-detecting module as claimed in claim 1 , wherein the transparent element is selected from the group consisting of a transparent glass and a transparent colloid.
5. The motion-detecting module as claimed in claim 4 , wherein the transparent colloid is formed of a material selected from the group consisting of an epoxy composition and an acrylic material.
6. The motion-detecting module as claimed in claim 1 , wherein the imaging lens is formed of a material selected from the group consisting of an epoxy composition and an acrylic material.
7. The motion-detecting module as claimed in claim 1 , wherein the light-emitting die provides an incoherent illumination.