JPH02136980A - Drawing input device - Google Patents

Abstract

PURPOSE:To obtain a miniaturized drawing input device which is not affected by the halation or the optical aberration by adding a light emitting part and a light receiving part into a roller and driving the roller on a drawing to input the picture signals after converting them into the digital signals. CONSTITUTION:An input part 1 includes a roller containing a light emitting part 2 and a light receiving part 3 and a digital conversion part 4 which drives the roller on a pattern area of a drawing where a position display sheet 8 is set and converts the signals of a pattern area of the drawing obtained via the part 3 into the digital signals. Then the roller is driven toward an arrow 20 in the same width as the valid light receiving width of the roller. Thus the picture signals of drawings of areas A-D are successively inputted. The input picture signals are converted into the digital signals via the part 4 and stored successively in a memory part 15 via a control part 5. Thus it is possible to obtain a compact drawing input device which can ensure a high contrast with no halation caused around images.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a drawing input device.

[Conventional technology]

Conventionally, this type of drawing input device projects light onto the drawing,
An image was captured with a CCD camera, the captured signal was converted into digital data, and the converted signal was embedded and input as drawing data.

[Problem to be solved by the invention]

The conventional drawing input device described above has the disadvantage that the device becomes large because a blackout curtain or the like is placed between the drawing and the CCD camera to prevent halation. Furthermore, unlike ordinary imaging screens, drawings require a high degree of contrast.

However, the conventional apparatus has the disadvantage that, especially when the screen to be imaged is large, optical aberrations occur around the imaged screen, making it difficult to obtain the necessary contrast I~.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drawing input device that is small and can provide high contrast without blurring the periphery of an image.

[Means to solve the problem]

The drawing input device of the present invention includes a roller having a built-in light emitting part and a light receiving part arranged in parallel to each other in the longitudinal direction, and an image of the drawing obtained by the light receiving part by running this roller over a pattern area of the drawing. a signal conversion unit that digitally converts the signal of one pattern area; a storage unit that sequentially stores the converted -pattern area signal; and a storage unit that sequentially extracts the signal of the one pattern area from the storage unit; and a control section and a display section that connect the drawings to display the entire area of the drawing.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a perspective view showing the roller of FIG. 1, and FIG. 3 is a sectional view of the roller of FIG. 2. As shown in FIG. 1, this drawing input device includes, as its input section 1, a roller containing a light-emitting section 2 and a light-receiving section 3; It has a digital converting section 4 which digitally converts the signal of one pattern area of the drawing obtained by the light receiving section 3 by running the signal in the pattern area.

In addition to this input section 1, there is also a storage section 15 which is connected to this input section 1 through an input/output cable 9 and which sequentially stores the -pattern area signals converted from the input section 1. There is a key human power section 6 and a control section 5 which sequentially take out the signals of the one pattern area and connect the signals of the -pattern area to command and control the display of the entire area of the drawing. Display section 7 that displays
There is.

As shown in FIGS. 2 and 3, the rollers of the input section 1 are
A support body 21 of the rotating shaft 11 includes a roller body 13 made of a transparent resin body, and a light emitting part 2 and a light receiving part 3 that are arranged parallel to each other in the longitudinal direction facing the inner wall of the roller body 13.
is attached to.

Further, the outer periphery of the roller body 13 except for the window 17 is covered with a black cover 12, and bearings 16 that fit on the rotating shaft 11 are attached to both ends of the cover 12. Furthermore, an arm 22 is connected to the end surface of the rotating shaft 11 that protrudes from the bearing 16, and a handle 10 is provided at the center of the arm 22, through which an input/output cable 9 connecting the light receiving section 3 and the light emitting section 2 is passed. is installed.

Further, the window 17 of the cover 12 is opened to the minimum size to prevent light from entering from the outside, and allows the light 19 emitted from the light emitting section 2 to efficiently illuminate the drawing.
The light 19 reflected from the position display sheet 8 is efficiently passed through the transmitting part of the position display sheet 8, and the reflected light 18 is efficiently absorbed by the light receiving part 3. For this reason, the transparent portion of the position display sheet 8 is made of, for example, a material whose surface is hardened with a plate glass having high transmittance.

In addition, the light emitting part 2 can use, for example, a light emitting diode, and the light receiving part 3 can use, for example, an inexpensive component such as a photodiode. Here, for example, in the black portion of the drawing, since there is no reflected light 18, no photovoltaic current is generated in the light receiving section 3, and the corresponding digital signal is (0). Also,
In the white part of the drawing, there is reflected light, so a photovoltaic current is generated, and the corresponding digital signal is (], ). In this way, the current sensitivity of the digital converter is set so that the digital signal is set to either (0) or (1) regardless of the black density of the pattern in the drawing.

FIGS. 4 and 5 are plan views of a position display sheet for explaining a method of inputting one pattern area in a drawing. Next, the operation of this drawing input device will be explained. first,
As shown in FIGS. 1 and 4, it is placed over the drawing 14 so as to fit within the frame 24 of the position display sheet 8. Next, the roller is moved in the direction of arrow 20 with the same width as the effective light-receiving width of the roller, and the image signal of the drawing of pattern area A is input.

The input image signal is converted into a digital signal by the digital conversion section 4. These converted image data are sequentially stored in the storage section 15 via the control section 5.

Next, when the roller finishes running in the pattern area A, the fifth
As shown in the figure, the pattern area B is overlapped with the pattern area A by a predetermined area, and then the pattern area B is continuously run with a roller. As a result, the image data of the pattern area B is input to the control section and stored in the storage section 15 in sequence. By repeating such operations, the image data of the pattern areas C and D are sequentially stored in the storage unit 15, and the image data of the entire area of the drawing has been collected.

Next, when outputting the collected image data and displaying it on the display section 7, first, the key human power section 6 sequentially extracts the image data from the storage section 15 via the control section 5 and displays it on the display section 7.
and display it. At this time, the two image data of the overlapping pattern area are temporarily stored in another storage device (not shown), and the two image data are compared with each other by a gate circuit section (not shown) of the control section. If they are the same, one of the image data is sent to the display section and the other image data is erased.

〔Effect of the invention〕

As explained above, in the present invention, the light emitting section and the light receiving section are provided inside the roller, the roller is moved over the drawing, and the image signal is converted into a digital signal and inputted, so the drawing and the light receiving section are placed close to each other. The reflected light can be received while maintaining a constant distance, and digital signal processing can be performed regardless of the density. Therefore, it is possible to obtain a compact drawing input device that is not affected by halation or optical aberrations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a perspective view showing the roller in FIG. 1, FIG. 3 is a sectional view of the roller in FIG. 2, and FIGS. 4 and 5 are FIG. 3 is a plan view of a position display sheet for explaining a method of inputting one pattern area in a drawing. 1... Input section, 2... Light emitting section, 3... Light receiving section, 4
...Digital conversion section, 5.Control section, 6.Key human power section, 7.Display section, 8.Position display sheet, 9
... Input/output cable, 10... Handle, 11... Rotating shaft, 12... Cover 13... Roller body, 14...
...Drawing, 15...Storage part, 16...Bearing, 17.
- Window, 18. 1... Light, 20 Arrow, 21... Support, 22... Arm 23... Overlapping area, 2
4...Frame.

Claims (1)

[Claims] A roller having a built-in light-emitting part and a light-receiving part arranged in parallel with each other in the longitudinal direction, and digitally converting the signal of the one-pattern area of the drawing obtained by the light-receiving part by running this roller over one pattern area of the drawing. a signal conversion section for sequentially storing the converted one-pattern area signals, a storage section for sequentially extracting the signals for the one-pattern area from the storage section, and connecting the signals for the one-pattern area to convert the entire area of the drawing. What is claimed is: 1. A drawing input device comprising: a control unit and a display unit that display a display unit.