Device for changing resolution of facsimile

#This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. .sctn.119 from an application entitled DEVICE FOR CHANGING RESOLUTION OF FACSIMILE earlier filed in the Korean Industrial Property Office on Jun. 29, 1996, and there duly assigned Serial No. 96-19354 by that Office.

#1. Field of the Invention

#The present invention relates to a device for changing the resolution of a facsimile. More specifically, the present invention relates to a device for changing the resolution of a facsimile that converts the resolution, without a separate electrical control.

#A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

#FIG. 1 is a diagram which shows a contemporary facsimile machine including a transmitter;

#FIG. 2 shows a device for changing the resolution of a facsimile in accordance with the principles of the present invention; and

#Reference will now be made in detail to the preferred embodiments of the present invention examples of which are illustrated in the accompanying drawings. For clarity, component reference numbers are consistent between all the drawings; such that, identical components in the present invention and those of prior art, are the same.

#A transmission process of a contemporary facsimile machine is discussed below with reference to FIG. 1 showing a contemporary facsimile machine having a transmitter. When a document 32 is loaded on a document feeder 30, located in the upper portion of the facsimile, a document sensor senses document 32 and rotates a transmission motor (not shown). Because the friction between document 32 and an automatic feeding roller 34, driven by the driving power of a transmission motor, is larger than that between documents 32, or between document 32 and a rubber pad 36, document 32 is conveyed in the direction of a driving roller 40 by automatic feeding roller 34. Thereafter, document 32 is conveyed to a contact image sensor 44, for reading and transmitting data of the document. This is done using the rotation of driving roller 40 and a pinch roller 38. A white roller 42, located on contact image sensor 44, refers to reference data before reading data of document 32, and at the same time, contact image sensor 44 senses light reflected from white roller 42 using an optical sensor so as to read the reference data. Contact image sensor 44 codes, compresses, and transmits the data through a telephone line. Document 32, whose data is transmitted through the aforementioned process, is discharged from the facsimile by a discharging roller 48 and pinch roller 46. Then, document 32 is stacked on a document stack. This accomplishes (or completes) the transmission process.

#In order to change its resolution in the facsimile process described in the previous paragraphs a reference resolution is mechanically realized, and a final resolution is electrically realized. Thus, the amount of information needed is obtained from data having the original resolution. A predetermined amount of the information is electrically added or subtracted. This creates a resolution different from the original.