Integrated circuit package provided with cooperatively arranged illumination and sensing capabilities
View Patent ↗An integrated circuit package includes an angled one-piece substrate having a light source fixed to one area and a sensor die fixed to a second area, such that the light source is directed to illuminate the field of view of the sensor die when a surface of interest is imaged. The integrated circuit package is well suited for generating navigation information regarding movement relative to a surface. In one method of forming the integrated circuit package, the single-piece substrate is originally a generally flat lead frame to which the sensor die and light source are attached. After the components have been connected, the lead frame is bent to provide the desired light source-to-sensor angle. In an alternative method, the lead frame is pre-bent. For either method, optics may be connected to the integrated circuit package, thereby providing a module that includes the optics, the light source, the sensor and the packaging body.
1. An integrated circuit package comprising:
a package body having an interior defined by at least one interior region;
a single-piece substrate at least partially within said interior of said package body, said single-piece substrate having a surface with first and second areas along planes which are at a non-aligned angle to each other;
an integrated circuit die attached to said first area of said single-piece substrate, said integrated circuit die including a sensor aligned with an optical window to enable imaging therethrough; and
a light source on said second area of said single-piece substrate in a position to direct illumination from said interior of said package body to a field of view of said sensor,
wherein said single-piece substrate is bent in a region between said first and second areas so that said light source is in said position to direct said illumination from said interior of said package body to said field of view of said sensor.
2. The integrated circuit package of claim 1 wherein said integrated circuit die includes circuitry dedicated to determining navigation information from image data acquired by said sensor, said navigation information being specific to movement of said sensor relative to an external surface being imaged.
3. The integrated circuit package of claim 1 wherein said angle of said first area relative to said second area is in the range of thirty degrees to one hundred and seventy-five degrees, said integrated circuit die and said light source having optical axes that are at an angle within said range.
4. The integrated circuit package of claim 1 wherein said package body includes a lid having first and second lenses, said first lens being aligned with said light source to direct light toward a surface of interest, said second lens being aligned with said sensor to collect light reflected from said surface of interest.
5. The integrated circuit package of claim 4 wherein said sensor is a matrix of pixel elements and wherein said integrated circuit die includes navigation-specific circuitry connected to said matrix.
6. An integrated circuit package comprising:
a package body;
a single-piece substrate connected to said package body, said single-piece substrate having a surface with first and second areas along planes which are at a non-aligned angle to each other;
an integrated circuit die attached to said first area of said single-piece substrate, said integrated circuit die including a sensor; and
a light source on said second area of said single-piece substrate in a position to direct illumination to a field of view of said sensor,
wherein said package body includes first and second portions with structural features that define a locking mechanism for selectively securing said first portion to said second portion such that said first and second areas of the single-piece substrate are at said non-aligned angle with respect to each other, wherein said single-piece substrate is bent in a region between said first and second areas so that said light source is in said position to direct said illumination from said package body to said field of view of said sensor.
7. The integrated circuit package of claim 6 wherein said integrated circuit die includes circuitry dedicated to determining navigation information from image data acquired by said sensor, said navigation information being specific to movement of said sensor relative to an external surface being imaged.
8. The integrated circuit package of claim 6 wherein said angle of said first area relative to said second area is in the range of thirty degrees to one hundred and seventy-five degrees, said integrated circuit die and said light source having optical axes that are at an angle within said range.
9. The integrated circuit package of claim 6 wherein said sensor is a matrix of pixel elements and wherein said integrated circuit die includes navigation-specific circuitry connected to said matrix.