KR940010603B1 - Shadow-removing method in a copier - Google Patents

Abstract

A method for removing shadow in a duplicator includes the steps of checking if a key is input or not, carrying out duplication when the key is not input, and turning on an LED when the key is input, determining the degree of light and darkness of the duplication by receiving the concentration sensed by an automatic concentration sensor from an automatic concentration controlling circuit, inputting the size of a duplicating material sensed, readjusting the level of an exposure lamp according to a predetermined value of the exposure lamp previously set in a microcomputer, and driving the exposure lamp when a start key is input, thereby performing the duplication.

Description

How to remove shadows on copier

1 shows a schematic internal structure of a general copier.

Figure 2 shows the relationship between the microcomputer and the main copier device.

3 is a flow chart of a microcomputer according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Automatic concentration control sensor 2: Automatic concentration control circuit

3: exposure amount control circuit of exposure lamp 4: microcomputer

5: Book Key 6: Automatic Density Control Key

7: Original size detection key 8: Density display LED

9: copier start key 11: original

12: Platen 13; Exposure lamp

14 lamp cover 15 mirror 1

16: mirror number two 17: mirror number three

18: zoom lens 19: mirror 4

20: OPC drum 21: MG roller

22: toner case 23: foreign key set

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for removing shadows in a copying machine for preventing shadows and printing distortion caused by a copying machine. The present invention relates to a method for removing shadows in a copier to prevent distortion of the product.

Conventional copying is generally performed using the same exposure amount irrespective of the shape or state of the copy, so that the shape of the peripheral portion is blurred by the height difference between the center of the booklet and the copy surface from the scanner of the copy lamp. When copying a folded document, shadows appear in the center of the booklet or images, and text and images are distorted so hard that it is difficult to read. By copying unnecessary shadows, too much consumption of consumables, or toners, is also reduced. .

Accordingly, an object of the present invention, in view of the above problems, according to the size of each booklet stores data on the intensity of the exposure lamp for the center of the booklet in the microcomputer to copy the exposure lamp in the copying, that is, the center of the booklet surface in the copy machine The method of shadow removal in the copier, which enhances the performance of the copier, further enhances the copier's performance so that the optimal exposure can be made at the center of the booklet by using an appropriate amount of toner according to the copy condition by strongly illuminating the data. In providing.

Hereinafter, the present invention will be described in more detail with reference to the drawings of FIGS. 1 to 3.

1 is a view showing a schematic internal structure of a conventional copying machine. In the general copying method, a copy 11 is placed on a copying table 12 and from the density control sensor 1 when the copying key 23 is input. After receiving the degree of concentration in the light and dark of the booklet, the intensity of the exposure lamp 13 surrounded by the lamp cover 14 is adjusted to the intensity of the voltage corresponding to the concentration, and in this way the exposure lamp ( 13 is irradiated to the copy 11, and the shape irradiated by the exposure lamp 13 is reflected by the first, second, and third mirrors 15, 16, and 17 so that the zoom lens 18 is normal. After being enlarged or reduced and reflected from the last fourth mirror 19, an appropriate amount of toner 22 is attached onto the OPC drum 20 so that it is copied after being printed by the MG roller 21 and then output. According to the present invention, when the exposure intensity of the exposure lamp 13 is adjusted in the conventional copying method, the key 5 of the function according to the present invention installed in the external key set 13 is pressed at the center of the booklet. The exposure lamp can be irradiated hard.

2 shows the relationship between the microcomputer and the main copier device in the copier. In general, the microcomputer starts the key input from the external key set 23 and uses the density of the density sensor 1 as the basic data. Copying is performed by controlling the intensity.

3 is a flow chart of a microcomputer mounted inside a copying machine according to an embodiment of the present invention, which includes an external key set 23, an automatic concentration control circuit 2, an exposure lamp control circuit 3, and a microcomputer 4; Thus, the processing of the microcomputer 4 includes the steps of checking whether there is a book key input, and if there is no book key input, a copy is made according to a general standard copy method, and if there is a book key input, the book key LED is notified. Turning on, inputting the detected concentration from the automatic concentration sensor 1 from the automatic concentration control circuit 2 to determine the degree of light and dark of the radiation, inputting the size of the detected booklet, and Readjusting the level of the exposure lamp according to a predetermined value of the intensity of the exposure lamp preset in the microcomputer according to the size of the water; and driving the exposure lamp when the copy start key 9 is inputted to make a copy; Is made of.

The shadow removal method in the copier of the present invention as described above will be described in more detail.

When the user wants to copy, especially when copying a centrally hollow copy such as a booklet, the user places the copy on the copy table 12 according to the copy's baseline, and sets the foreign key set 23 on the top of the copy machine. Input booklet key 5 to execute the object of the present invention installed in. At this time, the microcomputer 4 receives the signal of the book key 5 and at the same time turns on the book LED to inform the outside that the book key 5 is input, and then automatically adjusts the density of the copy from the density sensor 1. Received through the density control sensor (2) and outputs the appropriate exposure level value to the exposure lamp control circuit 3 in accordance with the data already installed in the microcomputer (4), and then the copy start key (9) by the user The copying is made by scanning the copy at the corresponding exposure amount in synchronization with the switching of.

As described above, the shadow removal method of the copier of the present invention makes the exposure lamp at the center of a booklet or a folded document harder than the planar copying and makes the optimal fine copying by using the toner appropriately. This can further enhance the copier performance.

Claims (1)

In a copying machine including an external key set 23, an automatic concentration control circuit 2, an exposure lamp control circuit 3, and a microcomputer 4, the processing of the microcomputer 4 checks whether there is a book key input or not. Step, if there is no book key input, copy according to a general standard copy method, and if there is a book key input, turning on the book key LED to indicate that the key is in a state of input, and detecting the density detected from the automatic concentration sensor (1). Inputting from the automatic concentration control circuit (2) to determine the degree of light and dark of the copy, inputting the detected book size, and according to the predetermined value of the intensity of the exposure lamp preset in the microcomputer according to the size of the booklet. And adjusting the level of the exposure lamp and driving the exposure lamp when the copy start key (9) is input to copy.