JPH0439779A - Graphic processor - Google Patents

Abstract

PURPOSE:To shorten the work time by allowing a graphic processing part to execute immediately a tapering processing, based on taper data from a coordinate input part. CONSTITUTION:The graphic processor is configured by a central processing unit 4 provided with a coordinate input part 1, a calculation processing part 2, and an image display part 3, a coordinate input device 5 to which graphic data is inputted, a display device 6 for displaying the graphic data on a screen, and a storage device 7 for containing a graphic data file 8. When taper data (center point, start point, end point, radius of curvature, start point, start point side diameter, end point side diameter, etc.) are inputted to this graphic processor from the coordinate input device 5, a tapering processing is executed immediately, based thereon, and its processing state is displayed on the display device 6. In the case a correction in necessary by a screen of this display device 6, a design rule check can also be executed in an interactive format by inputting the taper data again. In such a way, the work time can be shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a graphic processing device that supports the design of printed circuit boards, and in particular has a function of interactively tapering a printed circuit board drawing in the design process. The present invention relates to a graphic processing device.

[Conventional technology]

There are two types of printed circuit boards: those with conductive parts of uniform width wired in a grid pattern (digital boards), and those with other conductive parts (analog boards).

Generally, in an analog board, the width of the conductive part is not constant, so when connecting a thin line to a thick line, it is necessary to reinforce the connecting part to prevent disconnection. Adding an arc-shaped figure to this connecting part to smoothly connect a thin line and a thick line is called tapering.

Conventional graphic processing equipment that supports the design of printed circuit boards (analog boards) can perform the numerous tapers that are required throughout the printed circuit board after the board design drawings are completed.
- A system was adopted in which the problems were processed in bulk.

[Problem to be solved by the invention]

In addition to tapering, the work required when designing a printed circuit board includes checking that shapes touch or are too close to each other to prevent short circuits or problems in the completed board.
There is a so-called design rule check to prevent errors from occurring.

By the way, conventionally, after the design drawing of the board is completed, the taper is processed all at once, so the design rule check can only be performed after the taper is completed. There were cases where it was necessary to redo the process, which caused the problem that it was extremely inefficient.

An object of the present invention is to provide a graphic processing device that supports the design of printed circuit boards with an interactive taper in the process of creating design drawings of the circuit board, and to enable design rule checks in real time. The aim is to shorten the time and increase efficiency.

[Means to solve the problem]

In order to achieve the above object, the graphic processing device of the present invention includes:
Taper data (center point, start point, end point 2) from the coordinate input section
The present invention is characterized by having a means for immediately performing a taper process based on the taper data upon input of a radius of curvature, a starting point, a diameter on the starting point side, a diameter on the end point side, etc.).

[For production]

Printed circuit board design drawings are created interactively.

In this process, whenever tapering is required, the operator inputs data for tapering (taper data) using a coordinate input device. When this taper data is input, the graphic processing device immediately executes the taper process and displays the process status on the display device.

A design rule check is performed in real time on the screen of this display device, and if correction is required, the taper data is input again. In this way, design rule checks during taper formation can be performed in an interactive manner, thereby reducing work time.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described using the drawings.

FIG. 1 is a block diagram showing the configuration of essential parts of a graphic processing device according to an embodiment of the present invention. This graphic processing device is
a central processing unit 4 comprising a coordinate input section 1, a calculation processing section 2, a screen display section 3; a coordinate input device 5 for inputting graphic data;
It is composed of a display device 6 that displays graphic data on a screen, and a storage device 7 that stores graphic data files 8.

The graphic data file 8 stores graphic data for board design, one of which is taper data 9 as shown in FIG.

FIG. 3 shows a specific example of tapering. Figure (A) shows that when connecting a narrow line segment 30 to a wide line segment 31 by tapering, how will the three points A, B, and C input from the coordinate input device 5, which will be described later, be connected after the taper is completed? This shows the location.

Hereinafter, the line segment 30 will be referred to as the starting point side of the taper, and the line segment 31 will be referred to as the end point side. In this example, line segment 31 on the end point side
It is assumed that the width of the line segment 30 on the starting point side is 1/3 of the width of the line segment 30 on the starting point side. The broken line 23 shows the center line of the line segment 31 on the end point side, and the broken line 24 shows the center line of the line segment 30 on the start point side.
indicates the intersection of these broken lines 23 and 24. Points A and B indicate arbitrary points on the respective center lines of the line segment 30°31.

Tapering is achieved by adding an arcuate figure to the connecting portion of line segments 30 and 31. In the case of FIG. 3(A), the width of the line segment 30 on the side of the starting point of the taper is 173 times the width of the line segment 31 on the end point side, so the taper is performed in three steps a-c.

The taper status is displayed on the display device 6 in real time. While viewing the screen of the display device 6, the operator makes adjustments to the position of the tapered figure, if necessary. FIG. 3(B) shows this, and the display device 6
This shows that the position of the tapered figure 21 is corrected like the figure 22 by following the cursor 20 on the screen (that is, by following the movement of the 0 point).

The tapering process according to the present invention will be described in detail below based on the example shown in FIG.

In the process of creating a board design drawing, the operator inputs taper parameters (taper data) from the coordinate input device 5 in an interactive manner each time tapering is necessary. This operator's operating procedure is shown in FIG. first,
In step 10, the radius of curvature of the center line of the taper is input. Next, in step 11, the width of the starting point side 30 of the taper (
Enter the starting point side diameter). Next, in step 12, point A is input. Then, in step 13, point B is input. In step 14, the width of the end point side 31 of the taper (end point side diameter) is input. Finally, input point C in step 15,
Instructs taper processing.

As a result, the central processing unit 4 executes the taper process,
The situation is displayed on the display device 6 in real time. The cursor moves on the screen of the display unit w6 in accordance with point data input from the coordinate input device 5. When point C is moved by this cursor operation, the tapered figure moves on the screen following the cursor 20, as shown in FIG. 3(B). In this way, when the final position of point C is specified using the coordinate input device 5, the tapering is completed.

FIG. 5 is a flowchart of a processing procedure in which the central processing unit 4 executes a taper process based on the taper data input from the coordinate input unit [5, and displays it on the display device 6. Further, FIG. 6 shows the process of the tapering process displayed on the display section w6 in order.

Now, in step 100, when taper data is inputted by the coordinate input section 1, first, in step 101, the calculation processing section 2 calculates the line segment AB2 as shown in FIG. 6(A).
Find a circle 25 that is tangent to 4 and line segment BC23 at the same time. Yen 2
5 and the straight line 23 is a point E1, and the point of contact between the circle 25 and the straight line 24 is a point, as shown in FIG. 6(B), the line segment A
A figure is created that is made up of three parts: D, arc DE, and line segment EC. This will be the centerline of the final shape, which will be widened and tapered using the following steps. In step 102, the calculation processing unit 2 gives the starting point side diameter to the line segment AD and the ending point side diameter to the line segment EC to give it width, and in step 1
At step 03, the screen display section 3 displays the line segment AD and the line segment EC on the display device 6. This is the preparation stage, and below:
Enter the taper stage. This will be explained below with reference to FIG. 6(C).

In step 104, the calculation processing unit 2 calculates a straight line 60 passing through the point E and perpendicular to the line segment EC23. Next step 10
5, find two points that are on the straight line 60 and are inside the line segment EC by half the width of the line segment AD. Point PEb
50.

Furthermore, in step 106, the line segment EC2 passes through PEa40.
Find a straight line 61 parallel to 3. And step 107
Then, find the intersection of the straight line 61 and the straight line AD24, and obtain PCRa.
41. Subsequently, in step 108, a point PMa42 located on the line segment AB24 and at the same distance from PCRa41 as to PEa40 is determined. Next, in step 109, a straight line 62 passing through P M a42 and perpendicular to the straight line 24 is determined.

Furthermore, in step 110, the intersection point of the straight line 60 and the straight line 62 is determined and set as PCa43. Then, in step 111, P
Centered on Ca 43, starting point P M a 42, PE
Find the arc with the end point a40, and define this as the outer tapered arc. Also, in step 112, the point is set as the starting point, P M
Find a line segment whose end point is a 42, and define this as the outer tapered line segment. Then, in step 113, a starting point side diameter is given to the outer taper arc and the outer taper line segment, and a width is given, and in step 114, the outer taper is displayed on the display device 6 by the screen display section 3 (see Fig. 3). Part a of (A) corresponds to this).

Treat the inner taper in the same way. First, in step 115, the calculation processing unit 2 calculates a straight line 71 that passes through PEb5o and is parallel to the line segment EC23. Then, in step 116, the intersection of the straight line 71 and the straight line AD24 is found, and P
It is set as CRb51.

Subsequently, in step 117, it is on the straight line 71 and PCRb
Point PMb52 located at the same distance as the dot when viewed from 5L
seek. Next, in step 118, a straight line 72 passing through the PMb 52 and perpendicular to the straight line 71 is determined. Further step 1
In step 19, a straight line 73 passing through the dot and perpendicular to the straight line AD24 is determined. Then, in step 120, the straight line 72 and the straight line 73 are
Find the intersection point and set it as PCb53. In step 121, an arc centered at PCb 53, with one point as the starting point and PMb 52 as the end point is determined, and this is defined as an inner taper arc. Also, in step 122, PMb52 is the starting point, PEb5
Find a line segment whose end point is 0, and define this as the inner taper line segment. Then, in step 123, a starting point side diameter is given to the inner tapered arc and the inner tapered line segment, and a width is given, and in step 124, the screen display unit 3 displays the display device! ! 6 shows the inner taper (corresponds to part b in FIG. 3(A)).

Even if the outer and inner tapers are displayed on the display device 6, a gap may occur between them. Therefore, in step 125, the calculation processing unit 2 checks whether the gap 32 exists (this can easily be done by comparing the starting point side diameter and the ending point side diameter), and if there is no gap, the process ends. If a gap exists, in step 126, the end point side diameter is determined by subtracting twice the start point side diameter from the end point side diameter. Then, in step 127, it is checked whether the new end point side diameter is smaller than the starting point side diameter, and if it is, the process proceeds to step 128; otherwise, step 10
Loop to 5. In step 128, the calculation processing unit 2 calculates an arc centered at one point F, with the dot as the starting point and the point E as the ending point, and this is used as a gap-filling taper. Then, in step 129, the starting point side diameter is given to the gap-filling taper to give it width, and in step 130, the screen display section 3 displays the part C in FIG. 3(A) on the display device 6. (as applicable), finish the taper.

A diagram of the tapering completed in this way is shown in FIG. 6(D). Further, the taper data at this time is stored in the graphic data file 8 of the storage device 7.

FIGS. 7A and 7B show short errors caused by batch taper processing.

That is, in FIG. 7(A), the figure 8 is displayed on the screen of the display device 6.
1 is connected to a figure 82 by an arc figure 83. At this time, the figure 83 is not in contact with the figure 80, but when tapered, as shown in Fig. 7 (
As shown in B), it can be seen that the tapered portion 84 comes into contact with the figure 80.

On the other hand, in the present invention, as shown in FIG. 3(B), it is possible to check the design rules for tapering in an interactive manner in the packaging design of analog boards.
For example, as shown at 90.91 in FIG. 8, the taper can be applied without being too close or touching.

〔Effect of the invention〕

As explained above, according to the present invention, in mounting design of an analog board, tapering can be performed interactively during the drawing design process, and design rules can be checked in real time.

Work time can be shortened and efficiency can be increased. Also, the shape can be easily confirmed visually.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of essential parts of a graphics processing device according to an embodiment of the present invention, FIG. 2 is a diagram showing how taper data is stored in a graphics data file, and FIG. 3 is a diagram showing how taper data is stored in a graphics data file. A diagram showing a specific example of tapering, FIG. 4 is a flowchart showing the procedure for inputting taper data,
FIG. 5 is a flowchart showing a process procedure for tapering, and FIG. 6 is a diagram showing an example of drawing a taper step by step. FIG. 7 is a diagram illustrating a short error due to batch taper processing, and FIG. 8 is a diagram illustrating how taper processing is performed in a design drawing of an analog printed circuit board. 1... Coordinate input section, 2... Calculation processing section, 3...
Screen display unit, 4...Central processing unit, 5...Coordinate input device, 6...Display device, 7...Storage device, 8
...Figure data file, 9...Taper data. Figure 3 (A) (I3) Figure 2 Figure 5 (C) Figure 5 (C1) Figure 6 and A) (B) Figure 5 (phantom Figure 6 (D) Figure 7 ( A) (B)

Claims (1)

[Claims] (1) In a graphic processing device that includes a coordinate input unit, a graphic display unit, a storage unit for storing graphic data, a graphic processing unit, etc., and supports designing of a printed circuit board in an interactive manner, the graphic processing unit When taper data (center point, start point, end point, radius of curvature, start point, start point side diameter, end point side diameter, etc.) is input from the input section, the device has a means for immediately performing taper processing based on the taper data. Characteristic graphic processing device.