# US 5,708,521 A · Actuated mirror array for use in optical projection system

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- Number: US 5,708,521 A
- Document ID: US5708521A
- Status: Granted
- Kind: A
- Application number: 08/239,434
- Filed: 1994-05-04
- Granted: 1998-01-13
- Earliest claimed: 1993-05-04
- Assignees: Daewoo Electronics Co., Ltd.
- Inventors: Yong-Bae Jeon; Young-Jun Choi
- Web page: https://patentgrep.com/patent/US5708521A

## CPC

- G02B 26/0858: {the reflecting means being moved or deformed by piezoelectric means}
- H04R 17/08: signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

An M.times.N actuated mirror array for use in an optical projection system, comprises: a substrate having an array of M.times.N openings therethrough and an array of connecting terminals, wherein each of the M.times.N openings is filled with a metallization and each of the connecting terminals is located on top of each of the M.times.N openings filled with the metallization; an array of M.times.N actuators, wherein each of the M.times.N actuators is provided with a top surface, a bottom surface and a pair of external sides, and is comprised of a pair of electrodisplacive members, a common signal electrode located between the pair of electrodisplacive members, and a pair of reference electrodes on the pair of external sides of the actuator, respectively; and an array of M.times.N mirrors, wherein each of the M.times.N mirrors is coupled with each of the M.times.N actuators and is located on the top surface thereof.

## Claims

### Claim 1

An M.times.N actuated mirror array, wherein M and N are integers, comprising:
a substrate having an array of M.times.N openings and an array of M.times.N connecting terminals thereon, each of the openings being filled with a metallization and each of the connecting terminals being located on top of each of the M.times.N openings filled with the metallization, wherein each of the openings filled with said metallization is electrically connected to a driver for generating an electrical signal;
an array of M.times.N actuators, wherein each of the M.times.N actuators is provided with a top surface, a bottom surface, a pair of external sides, and is comprised of a pair of electrodisplacive members, a common signal electrode located between the pair of electrodisplacive members, and a pair of reference electrodes on the pair of external sides of the actuator, respectively;
an array of M.times.N mirrors, wherein each of the M.times.N mirrors is coupled with each of the M.times.N actuators and is located on the top surface thereof; and
an array of M.times.N blocking walls for preventing the spreading of an electrically conductive paste, each of the blocking walls being located on the top surface of said substrate and at an equidistance from two adjacent connecting terminals, wherein the electrically conductive paste is for connecting electrically each of the connecting terminals, each of the openings filled with said metallization with the common signal electrode in each of the actuators, thereby allowing the electrical signal from the driver to be applied to each of the actuators.

### Claim 2 (depends on 1)

The M.times.N actuated mirror array of claim 1, wherein each of said blocking walls is comprised of an insulating adhesive material.