JPH02141738A - Original reader - Google Patents

Abstract

PURPOSE:To form a simple and inexpensive color converting function by adding one or more colored plates in addition to a white plate to a color original reader. CONSTITUTION:A halogen lamp 12 and a CCD sensor integrally move just under the standard white plate 3 and move toward an original so as to start the reading of the original after correcting the unevenness of the light quantity of the halogen lamp and taking a white color as standard. When a color 1 other than the white color, for example, a red color is moved to the position of the standard white plate 3 by the use of a motor in the case of reading the standard white plate during the operation, it is judged that the standard color is the red one and the red color becomes white, then the red color of the original is read as the white color. In the case that a green color exists in the original, it is read as the color of a blue system since the red component is cut as the white color. Thus, the conversion of color is easily performed by adding the optional colored plate instead of the standard white one.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an original reading device that reads an original using a lamp 9.

[Prior Art] Conventionally, in a document reading device, as shown in FIG.
In order to prevent unevenness in illuminance in the thrust direction of the lamp 12 (usually a halogen lamp or a fluorescent lamp), a standard white plate 3 is inserted, and the unevenness in light intensity is corrected by reading the standard white plate before reading the original. I had a method.

[Problems to be Solved by the Invention] Using a conventional example, the color document reading device U can be constructed using digital technology, and a color conversion function can be added as an additional function. However, color conversion requires the design of digital circuits and processing software, and the equipment is also expensive, especially in terms of hardware.

[Means for Solving the Problems] The present invention provides a convenient and inexpensive color conversion function by adding one or more color plates in addition to the white plate to a color document reading device. .

In order to solve the above problems, the present invention provides a document reading device that has a shading board and thereby determines the reference white color of a lamp, which has a white shading board and at least one or more shading boards other than white. It is characterized by this.

[Example] Fig. 1 shows an example of the present invention. In Fig. 1, 1 is a colored plate;
2 is a rotating shaft, and 3 is a standard white plate. Rotation ll1Ih2
A shaft is rotated by a drive belt 5 and a drive motor 4. For reading, the halogen lamp 12 lights up,
This is done by shining light onto the original placed on the original platen glass 7 using a reflective shade 11, forming an image of the reflected light using the focusing transmitter array 10, and inputting the image to the CCD sensor 9.

Before this reading, the halogen lamp 12 and the CCD sensor are moved as one to just below the standard white plate 3, and after correcting the uneven light intensity of the halogen lamp and making white the standard,
Move toward the original and start scanning. During the above normal operation, when reading the P4 quasi-white board, a color other than 0 is detected! (for example, red) to the position of the standard white board 3 using a motor. In that case, the standard color is determined to be red, so red becomes white. That is, the red color of the original is read as white. Furthermore, if there is green in the document, the red component is cut as white, so it is read as the color of the front thread. in this way,
By attaching a colored plate of your choice instead of the standard white color, you can easily change the color.

[Other Examples] (Example 2) FIG. 3 is a cross-sectional view of Example 2. The device consists of three colored plates for color conversion and one standard white plate, and the standard white plate part shown in Figure 1 is attached. Three types of color conversion can be performed by automatic switching using a motor.

(Example 3) Example 3 is shown in FIG. A cavity is created in a document table weigher 6 that presses a document table glass 7, and a standard white plate or a colored plate 1 for color conversion can be manually converted therein. Although this device is the most convenient and inexpensive, it has the disadvantages of being manual, managing the colored plates taken out, and needing a place to store them.

(Example 4) When the mechanism of the present invention is used in a black and white document reading device,
You can erase any color written on the manuscript.

[Effects of the Invention] As described above, a document reading device having a color conversion function can be provided by the simple and inexpensive means of replacing the IRI white plate and the colored plate.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the document reading device of the present invention, Fig. 2 is a side view of a conventional example, Fig. 3 is a side view of another embodiment, and Fig. 4 explains yet another embodiment. FIG. 1 is a colored plate, 2 is a rotating shaft, 3 is a standard white plate, 4 is a drive motor, 5 is a drive belt, 6 is a document glass holder, 7 is a document table glass, 8 is a CCD sensor stand, 9 is a CCD sensor, IO is a focusing device 11 is a reflector, and 12 is a (halogen) lamp.

Claims (1)

[Claims] What is claimed is: 1. A document reading device that has a shading board and determines a standard white color of a lamp, the document reading device having a white shading board and at least one or more shading boards other than white.