JPH02226482A - Picture synthesis display method and aligning method - Google Patents

Abstract

PURPOSE:To prevent a flicker and to visibly display two pictures even when objectives are different in brightness by switching the independently image- picked-up two pictures in the raster scanning direction, at least at every picture element, and synthetically displaying them in a zig-zag grid shape on a monitor television. CONSTITUTION:In a data selector 7, the output signals of television cameras 3 and 4 are alternately switched at every picture element in the raster direction, for mutually adjacent scanning lines, scanning lines A, B, C,... in even-number fields are shifted with respect to scanning lines (a), (b), (c),... in odd-number fields by one picture element, and displayed in a zig-zag grid shape. To shift one picture element for each line, for example, a picture element switching sequence is inverted at every adjacent scanning line. Consequently, the picture of the hutched television camera 3 and the picture of the un-hutched television camera 4 are displayed in the zig-zag grid shape as shown in a figure. Thus the both pictures are equally and visibly displayed on a screen as far as possible, and even when the both pictures are different in brightness, the flicker is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image synthesis display method and a position alignment method used for automatic IC mounting and the like.

[Prior art] In recent years, component mounting is often performed in an automated process. For this reason, for example, an image of a component and an image of a board on which the component is mounted are combined and displayed on the screen. If it is displayed in such a way that it can be implemented accurately, accurate implementation can be performed using the specifications at that time.

Conventionally, the following three methods have been used to synthesize such images.

a) Optically combine two objects using a half mirror or the like, and capture the combined image with a television camera.

b) When an object is imaged individually with a television camera, a cross line cursor (reference line) is generated and one or two sides of the object are aligned with this cross line cursor.

C) When objects are imaged separately with a television camera and the resulting images are displayed on a television monitor, one object is alternately displayed in the odd field and the other object in the even field.

[Problems to be Solved by the Invention] However, the method a) requires an optical system, making it difficult to miniaturize the device. With method b), only Krokukasa and one object can be observed.

Although method C) allows two objects to be observed simultaneously,
There is a problem in that when there is a difference in brightness between objects, it causes flicker on the television monitor, making the display difficult to see.

[Means for Solving the Problems] In order to solve this problem, the first invention switches two independently captured images at least one pixel at a time in the raster scanning direction, and switches adjacent scanning lines between each other. The pixel switching order is reversed to display a composite display in a houndstooth pattern on a monitor television.

The second invention is a positioning method using this method, in which a movable table is controlled so that the images obtained in the first invention have a desired positional relationship.

[Operation] In the first invention, the captured image signals are alternately selected for each element in the rask direction and displayed on the monitor in a houndstooth pattern. In the second aspect of the invention, images captured and displayed are displayed in a desired positional relationship by controlling a movable table.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention.
In the figure, 1 is an object to be mounted, and 2 is a board on which the components are mounted.These are imaged by a television camera 3.4, and supplied to A/D converters 5 and 6, respectively, to receive digital signals. is converted to The two types of converted digital signals are alternately switched pixel by pixel in the raster direction by the data selector 7. The signal output from the data selector 7 is converted into an analog signal by a D/A converter 8 and displayed on a monitor television 9.

Note that the television cameras 3 and 4 are connected to a synchronization signal generator 10.
A synchronization signal generated by the A/D converters 5, 6,
The D/A converter 8 is supplied with a clock signal generated by a clock signal generator 11 based on the synchronization signal, and the data selector 7 is supplied with a switching signal generated by a timing signal generator 12 based on the synchronization signal and the clock signal. is being supplied. In addition, as mentioned above, the data selector 7
The output signals of the television camera 3.4 are alternately switched pixel by pixel in the raster direction, and even field scanning lines A, B, C, etc. are switched between adjacent scanning lines as shown in FIG. and odd field scanning lines a, b, c
... is shifted by one pixel and displayed in a houndstooth pattern. To shift one pixel, for example, the pixel switching order is reversed between adjacent scanning lines. For this reason, the hatched image of the television camera 3,
The image of the television camera 4 without hatching will be displayed in a checkered pattern as shown in the figure. The reason for doing this is to display both images as evenly as possible on the screen to make them easier to see, and to prevent flicker from occurring even if there is a difference in brightness between the two images.

In the above embodiment, a case was explained in which two television cameras were used. For example, one television camera can take an image of the object to be mounted, temporarily store it in memory, and then use that camera to take an image of the object to be mounted. It is also possible to image a board on which a target object is mounted, alternately switch between that image and an image previously stored in memory, and display a composite display of both.

FIG. 3 is a diagram of an apparatus for aligning objects with each other using this apparatus. For example, each object is placed at a separate location, and at least one of the objects is located at X, Y.
It is placed on a movable table 13 that is movable in the direction.

Therefore, the synthesized image becomes as shown in FIG. 4, and the shift can be absorbed by adjusting the movable table 13, making perfect alignment possible. Once the alignment has been completed in this way, an IC or the like may be picked up by a device (not shown) and mounted on a board. At this time, the only error is the mechanical error between the pickup and place.

Currently 100 pin class I with terminal pitch of 0.65mm
As shown in Figure 5, C has terminals that are entirely bent (Figure 5 exaggerates this).
. In this case, as shown in FIG. 6, by rotating the position of the IC by the bending angle θ of the terminal and correcting the position,
Can be mounted accurately on the board. However, in this case, X.

In addition to the Y-Chee Lumi 11 function, a table with a rotating function is required.

[Effects of the Invention] As explained above, the first invention is such that two independently captured images are switched at least every pixel in the raster scanning direction and displayed in a houndstooth pattern on a monitor television. Therefore, even if there is a difference in brightness between objects, flicker can be prevented and two images can be displayed in an easy-to-see manner.

In addition to the first function, the second invention includes placing at least one object on a pair of movable tables whose position can be changed, and moving the movable tables so that the two images have a desired positional relationship. This has the effect of making alignment easier.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a display screen, FIG. 3 is a diagram showing a device for aligning objects with each other, and FIG. 4 is a diagram showing IC positioning. FIG. 5 is a diagram showing the relationship between the IC bin and the IC package, and FIG. 6 is a diagram showing the state when the IC shown in FIG. 5 is mounted. 1.2...Target, 3.4...Television camera, 5.6...A/D converter, 7...Data selector, 8...D/A Converter, 9... Monitor television, 10... Synchronization signal generator, 11...
... Clock generator, 12 ... Timing generator,
13...Movable table. Figure 1

Claims (2)

[Claims] (1) In an image synthesis display method in which two independently captured images are displayed in a composite manner on one monitor television, the two images are switched at least every pixel in the raster scanning direction, and between adjacent scanning lines, An image synthesis display method characterized in that the pixel switching order is reversed and the pixels are switched to display a composite display in a houndstooth pattern on a monitor television. (2) At least one of the two objects is placed on a movable table whose position can be changed, and the two images obtained by capturing the object independently are displayed on one monitor television. In a positioning method in which images of both objects are aligned by moving a movable table, the two images are switched at least one pixel at a time in the raster scanning direction and displayed in a composite manner on a monitor television. . A positioning method characterized by positioning both objects by moving a movable table and displaying the two images in a desired positional relationship.