Bonding of resonant oscillating mirror to frame
Examples are disclosed that relate to a resonant scanning mirror system comprising a mirror structure mounted to a frame via an adhesive. One example provides a resonant scanning mirror system comprising a frame defining a perimeter around a space, the frame including a mirror mounting portion having an opening. The mirror system also comprises a mirror structure spanning the space, the mirror structure having an oscillating mirror portion and a foot, the foot being attached to the mirror mounting portion with an adhesive and being positioned such that a location of the opening in the mirror mounting portion at least partially defines a location of an edge of a fillet of the adhesive where the adhesive meets the foot of the mirror structure.
1. A resonant scanning mirror system comprising:
a frame and a mirror structure adhered to the frame via an adhesive,
the frame defining a perimeter around a space, the space being configured to accommodate oscillating motion of the mirror structure, the frame including a mirror mounting portion comprising an opening, and
the mirror structure spanning the space, the mirror structure having an oscillating mirror portion positioned over the space in the frame, a flexure, and a foot adhered to the mirror mounting portion of the frame,
the flexure extending between the foot and the oscillating mirror portion,
the foot being adhered to the mirror mounting portion with the adhesive, and
the foot being positioned such that an edge of a fillet of the adhesive where the adhesive meets the foot of the mirror structure follows at least a portion of an edge of the opening.
2. The resonant scanning mirror system of claim 1 , wherein the foot further comprises a spacer, wherein an edge of the spacer comprises a curve.
3. The resonant scanning mirror system of claim 2 , wherein an edge of the opening adjacent to the edge of the spacer comprises a curve.
4. The resonant scanning mirror system of claim 1 , wherein the edge of the fillet of the adhesive is located fully within the foot.
5. The resonant scanning mirror system of claim 1 , further comprising one or more piezoelectric actuators positioned on the frame.
6. The resonant scanning mirror system of claim 1 , further comprising a substrate, wherein the frame is mounted to the substrate.
7. The resonant scanning mirror system of claim 6 , wherein the substrate comprises a printed circuit board.
8. The resonant scanning mirror system of claim 1 , wherein the adhesive comprises a solder.
9. The resonant scanning mirror system of claim 1 , wherein the adhesive comprises a polymer adhesive.
10. A display device, comprising:
a resonant scanning mirror system comprising
a frame and a mirror structure adhered to the frame via an adhesive,
the frame defining a perimeter around a space, the frame including a mirror mounting portion comprising an opening, and
the mirror structure spanning the space, the mirror structure having an oscillating mirror portion positioned over the space in the frame, a flexure, and a foot adhered to the mirror mounting portion of the frame,
the flexure extending between the foot and the oscillating mirror portion,
the foot being adhered to the mirror mounting portion with the adhesive, and
the foot being positioned such that an edge of a fillet of the adhesive where the adhesive meets the foot of the mirror structure follows at least a portion of an edge of the opening.
11. The display device of claim 10 , further comprising a spacer, wherein an edge of the spacer comprises a curve, and wherein an edge of the opening adjacent to the edge of the spacer also comprises a curve.
12. The display device of claim 10 , wherein the opening is D-shaped or elliptical.
13. The display device of claim 10 , wherein the edge of the fillet of the adhesive is located fully within the foot.
14. The display device of claim 10 , wherein a location of the opening at least partially defines a location of the edge of the adhesive where the adhesive meets the foot of the mirror structure.
15. The display device of claim 10 , wherein the resonant scanning mirror system further comprises a printed circuit board, and wherein the frame is mounted to the printed circuit board.
16. The display device of claim 10 , wherein the adhesive comprises a polymer adhesive.
17. The display device of claim 10 , wherein the adhesive comprises a solder.
18. A method of assembling a resonant scanning mirror system, the method comprising:
applying an adhesive to one or more of a frame adjacent to an opening in the frame and a spacer of a foot of a mirror structure;
placing the mirror structure onto a mirror mounting portion of the frame, such that an edge of a fillet of the adhesive where the adhesive meets the mirror structure follows at least a portion of an edge of the opening in the frame; and
hardening the adhesive.
19. The method of claim 18 , further comprising mounting the frame onto a printed circuit board.
20. The method of claim 18 , further comprising inspecting an adhesive bond through the opening in the frame.