# US RE40,945 E1 · Increasing scanning resolution through driving system control

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- Number: US RE40,945 E1
- Document ID: USRE40945E1
- Status: Granted
- Kind: E1
- Application number: 11/357,895
- Filed: 2006-02-17
- Granted: 2009-10-27
- Earliest claimed: 2000-01-15
- Inventors: Chuan-Yu Hsu; Chen-Hsiang Shih
- Web page: https://patentgrep.com/patent/USRE40945E1

## Abstract

A method of increasing the scanning resolution of a scanner through controlling its driving system. By suitably adjusting the timing relationship between motor pulses and exposure pulses, a low-resolution driving system can produce a high-resolution image with no additional production cost incurred.

## Claims

### Claim 1

A method of increasing scanning resolution of a scanner through controlling its driving system, comprising the steps of:
providing shift gate clock pulses to a charge-coupled device such that one shift gate clock pulse period corresponds to an exposure cycle for the charge-coupled device; and
providing motor pulses to a motor such that one motor pulse period corresponds to a plurality of exposure cycles for the charge-coupled device.

### Claim 2 (depends on 1)

The method of claim 1, wherein the motor includes a stepper motor.

### Claim 3

A method of increasing scanning resolution of a scanner through controlling its driving system, comprising the steps of:
providing motor pulse signals to a driving motor of the scanner;
providing shift gate clock pulse signals to a charge-coupled device of the scanner; and
adjusting a timing relationship between the motor pulse and the shift gate clock pulse such that one motor pulse cycle corresponds to a plurality of shift gate clock pulse cycles.

### Claim 4 (depends on 3)

The method of claim 3, wherein one shift gate clock cycle corresponds to an exposure cycle for the charge-coupled device.

### Claim 5 (depends on 3)

The method of claim 3, wherein the motor includes a stepper motor.

### Claim 6 (depends on 1)

The method of claim 1, further comprising providing motor pulses to a motor such that one motor pulse period corresponds to two exposure cycles for the charge-coupled device.

### Claim 7 (depends on 3)

The method of claim 3, further comprising adjusting a timing relationship between the motor pulse and the shift gate clock pulse such that one motor pulse cycle corresponds to four shift gate clock pulse cycles.

### Claim 8

An apparatus, comprising:
a driving controller of a scanning device having a driving motor and a charge-coupled device, said driving controller adapted to:
provide motor pulse signals to the driving motor;
provide shift gate clock pulse signals to the charge-coupled device; and
adjust a timing relationship between the motor pulse and the shift gate clock pulse such that one motor pulse cycle corresponds to a plurality of shift gate clock pulse cycles.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein said driving controller is further adapted to:
adjust the timing relationship between the motor pulse and the shift gate clock pulse such that one shift gate clock cycle corresponds to an exposure cycle for the charge-coupled device.

### Claim 10 (depends on 8)

The apparatus of claim 8, wherein the motor comprises a stepper motor.

### Claim 11 (depends on 8)

The apparatus of claim 8, wherein said driving controller is further adapted to:
adjust a timing relationship between the motor pulse and the shift gate clock pulse such that one motor pulse cycle corresponds to two shift gate clock pulse cycles.

### Claim 12

An apparatus, comprising:
a scanner driving system of a scanner, adapted to:
provide shift gate clock pulses to a charge-coupled device of the scanner such that one shift gate clock pulse period corresponds to an exposure cycle for the charge-coupled device; and
provide motor pulses to a motor of the scanner such that one motor pulse period corresponds to a plurality of exposure cycles for the charge-coupled device.

### Claim 13 (depends on 12)

The apparatus of claim 12, wherein the motor comprises a stepper motor.

### Claim 14 (depends on 12)

The apparatus of claim 12, wherein said scanner driving system is further adapted to:
provide motor pulses to a motor of the scanner such that one motor pulse period corresponds to four exposure cycles for the charge-coupled device.