# US 2014/0153064 A1 · Scan projection device and scan controlling method thereof

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- Number: US 2014/0153064 A1
- Document ID: US20140153064A1
- Status: Published application
- Kind: A1
- Application number: 13/934,616
- Filed: 2013-07-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Lite-On It Corporation
- Applicants: Lite-On It Corporation
- Inventors: Wen-Lung LIN
- Web page: https://patentgrep.com/patent/US20140153064A1

## CPC

- H04N 1/024: Details of scanning heads {; Means for illuminating the original}
- H04N 9/3135: {Driving therefor}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A scan projection device and a controlling method are projected. The scan projection device comprises a light source module, a scanning module and a scan driving device. The light source module is for providing an image beam. The scanning module has a first direction scanning frequency and a second direction scanning frequency. The first direction scanning frequency is 2N+1 times of the second direction scanning frequency, wherein N is an integer. The scanning module is for projecting the image beam towards a particular direction and scanning a projection surface. The scan driving device controls the scanning module to scan the projection surface back and forth along a scan trace at the first direction scanning frequency and the second direction scanning frequency.

## Claims

### Claim 1

A controlling method of a scan projection device, wherein the scanning projector device comprises a scanning module, and the controlling method comprises:
controlling a first direction scanning frequency of the scanning module;
controlling a second direction scanning frequency of the scanning module, wherein the first direction scanning frequency is 2N+1 times of the second direction scanning frequency, and N is an integer; and
scanning a projection surface back and forth along a scan trace at the first direction scanning frequency and the second direction scanning frequency.

### Claim 2 (depends on 1)

The controlling method according to claim 1, wherein the first direction scanning frequency is a sine wave frequency.

### Claim 3 (depends on 1)

The controlling method according to claim 1, wherein the second direction scanning frequency is a sine wave frequency.

### Claim 4 (depends on 1)

The controlling method of according to claim 1, wherein the first direction scanning frequency is a mono frequency.

### Claim 5 (depends on 1)

The controlling method of according to claim 1, wherein the second direction scanning frequency is a mono frequency.

### Claim 6 (depends on 1)

The controlling method of according to claim 1, wherein the step of scanning the projection surface back and forth along the scan trace comprises scanning the projection surface along the scan trace forwardly and reversely within a scan period of the second direction scanning frequency.

### Claim 7

A scan projection device, comprising
a light source module for providing an image beam;
a scanning module having a first direction scanning frequency and a second direction scanning frequency, wherein the second direction scanning frequency is 2N+1 times of the first direction scanning frequency, N is an integer, and the scanning module is for projecting the image beam towards a particular direction and scanning on a projection surface; and
a scan driving device for controlling the scanning module to scan the projection surface back and forth along a scan trace at the first direction scanning frequency and the second direction scanning frequency.

### Claim 8 (depends on 7)

The scan projection device according to claim 7, wherein the first direction scanning frequency and the second direction scanning frequency both are a sine wave frequency.

### Claim 9 (depends on 7)

The scan projection device according to claim 7, wherein the first direction scanning frequency and the second direction scanning frequency both are a mono frequency.

### Claim 10 (depends on 7)

The scan projection device according to claim 7, wherein within a scan period of the second direction scanning frequency, the scan driving device drives the scanning module to scan the projection surface along the scan trace forwardly and reversely.