Scanner with bus power-supply drive

Abstract

A scanner driven by a bus power supply uses a charge-coupled device as its photosensitive element. The scanner at least includes: bus lines, white light emitting components, driving components and control components. The bus line is used to connect the scanner and the computer host, and the computer host provides bus power through the bus line for the scanner to use; the white light emitting part is arranged in the scanner, and the white light emitting part uses the bus power, so as to provide the scanner in the The irradiation light source required in the image scanning process; the driving part is arranged in the scanner, and the driving part uses the bus power supply to realize various functions; and the control part is arranged in the scanner, and the control part makes the bus power supply in the first A period of time is used for starting the white light emitting component, and the bus power supply is continued to be used for the white light emitting component to continuously emit light and drive components in the second period of time.

Description

technical field [0001] The present invention relates to a scanner, and more particularly to a scanner driven by bus power. Background technique [0002] Among the many peripheral devices of a personal computer, a scanner can be said to be one of the basic equipment, especially a scanner with a charge coupled device (CCD) as a photosensitive element (hereinafter referred to as a scanner) that occupies a large amount in the market. CCD scanner). The quality and speed of the scanned documents of the CCD scanners launched by various manufacturers are not much different. Therefore, how to make the CCD scanner more convenient to use has become another selling point to attract consumers. [0003] Please refer to figure 1 , which represents a schematic diagram of the internal structure of the CCD scanner. The stepping motor 110 can rotate along the direction of the arrow as shown in the figure. The cold cathode fluorescent lamp (cold cathode fluorescent lamp, CCFL) (or discharg...

AI Technical Summary

Problems solved by technology

[0006] 1. The overall structure is relatively complicated: the traditional CCD scanner, because its electric power source is an external power supply, so the CCD scanner itself must be equipped with an additional set of power lines to connect to the external power supply

Because of this, its overall structure is more complex

[0007] 2. The use must be limited by the existence of an external power supply: traditional CCD scanners must use an external power supply as the source of working power

If the external power supply does not exist, it will inevitably cause the dilemma of being unusable

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