JP2836535B2 - Panel display state recognition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel display state recognizing device, and more particularly to a device for displaying an operating state by turning on / off a plurality of display elements on a display panel, and recognizing the operating state of the device. The present invention relates to a panel display state recognition device that automatically performs inspection and monitoring of an object.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing a conventional example. The pattern inspection apparatus illustrated in FIG. 7 includes an all-off pattern generation circuit 701 that generates a signal for driving an inspection object.
, An entire lighting pattern generation circuit 702, a reference pattern image memory 703 for storing a pattern generated by the all lighting pattern generation circuit 702, a photoelectric conversion circuit 704 for imaging an object to be inspected, and an analog signal from the photoelectric conversion circuit 704. A / D conversion circuit 705 for converting to a digital signal, all-on image memory 706 and all-off image memory 707 for storing the digital signal, and comparison circuit 708 for comparing the images in these two memories to detect the difference And the comparison circuit 70
8. A smoothing circuit 70 for removing noise from the comparison image output
9 and a binarizing circuit 7 for binarizing the image from which noise has been removed
10, an image cutout circuit 71 for comparing the binary image h with the reference pattern j in the reference pattern image memory 703
1, a noise removing circuit 712 for removing noise from the cut-out image, a region extracting circuit 713 for extracting a closed region of the image from which noise has been removed, and checking the area and position of the extracted region to determine whether or not there is a defect. And a determination circuit 714 that performs the determination. (See, for example, JP-A-2-230476.) Since this pattern inspection apparatus directly detects a defect by directly comparing an all-lighting pattern and an all-light-off pattern, a level difference between the all-lighting pattern and the all-light-off pattern is obtained. If there is, it cannot be detected. In other words, since it is impossible to detect the reversely lit dots which are turned off when all lights are turned on and turned on when all lights are turned off, there is a technique for inserting an inversion circuit between the all-off image memory 707 and the comparison circuit 708. (See, for example, JP-A-5-302898.
No.)

In the conventional apparatus, the position of the display element is determined at a predetermined position on the image data by adjusting the positional relationship between the display element and the image input unit, such as the distance and angle. Although it is assumed that there is a plurality of display elements on the display panel of the object, the adjustment of the positional relationship between the display panel and the image input unit alone causes the position of the display element to be determined at a predetermined position. There was something that could not be determined, and the display element could not be specified.

[0003]

According to the present invention, there is provided a panel display state recognizing apparatus, comprising: a video input instructing unit for instructing an input of a display panel image of an object; and a photoelectric conversion unit for converting an image into image data by the input instruction. Panel display state recognition including an input unit, an image memory for holding a plurality of the image data for each input instruction, and a difference image generating unit for generating a difference image between two image data selected from the image memories. In the apparatus, (A) an element extraction unit that extracts all display elements in a lighting state on image data from the difference image and holds lighting position data, and (B) an approximate position of all display elements on the image data A general position holding unit for holding data,
(C) an element specifying unit that compares the lighting position data with the approximate position data to specify a display element, determines display of the display element, and holds a determination result, and (D) an object at the time of the input instruction. A reference state description unit that describes and holds, as reference state data, a reference display state of the display element corresponding to the operation state of the object; and (E) a pass / fail comparison judgment between the reference state data and a judgment result is performed for all display elements. A recognition unit for recognizing the operation state of the object and holding the comparison result;
(F) a result output unit for outputting and recording the comparison recognition result on a screen.

[0004]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

As means for inputting an image of an object, an image input instructing unit 1 for instructing an input of a display panel image of the object.
A photoelectric conversion input unit 3 for converting a video into image data 4 according to an input instruction 2; and an image memory 5 for holding a plurality of image data 4 for each input instruction.

As means for normalizing the luminance on the image data, a difference image generator 6 for generating a difference image 7 between two image data selected from the image memory 5, And an element extracting unit 8 for extracting all the display elements in the lighting state and holding the lighting position data 9.

As means for specifying the extracted display elements, approximate position data of all display elements on image data is used.
A schematic position holding unit 10 for holding a display element 11 and an element specifying unit for comparing the lighting position data 9 and the approximate position data 11 to specify a display element to determine display of a display element and to hold a determination result 13 It has 12 and.

As a means for automatically judging the operation state of the object, a reference state description unit 14 which describes and holds, as reference state data 15, a reference display state of a display element corresponding to the operation state of the object at the time of input instruction. And a comparison / recognition unit 16 for performing a pass / fail comparison judgment between the reference state data 15 and the judgment result 13 for all display elements, recognizing the operation state of the target object and holding the comparison result 17, and displaying the comparison recognition result on the screen. And a result output unit 18 for outputting and recording. Here, the photoelectric conversion input unit 3 inputs a video of the display panel and outputs image data 4.

FIG. 2 is a schematic diagram showing an example of a recognition target. A display panel is provided in front of the object, and a plurality of display elements are provided on the display panel.

FIG. 3 shows a display panel having 256 gradations and 512 ×.
It is a part of the image data digitally converted to 512 pixels, and is a value along the Y axis shown in the AA portion of the display panel in FIG. The data on the positive side is image data 4 according to the input instruction 2 when the display element is turned on, and the data on the negative side is image data 4b when the display element is turned off as negative.
The position of the display element 1 is near the position y = 80, but there are other pixels with high luminance, and it is impossible to extract the display element by the binarization determination using a single threshold value.

The difference image 7 generated by the difference image generator 6
Of the image data 4 and the image data 4 shown in FIG.
FIG. 4 shows the difference image with b. By utilizing the fact that only the pixel at the position of the display element in the lighting state has a high luminance, the element extraction unit 8
Thus, the lighting position data 9 can be extracted. In the present embodiment, in the element extraction unit 8, a pixel position that is higher than the lighting determination threshold value for all the pixels of the difference image 7 and whose vertex is high with respect to all surrounding pixels is set as lighting position data. I have.

As an example of the difference image 7, a part including the display elements 1 and 2 in the lighting state in FIG. 2 is shown in FIG.
y). The display element is located at the high luminance position (205, 76) and is stored in the lighting position data 9. General position holder
10 shows the approximate position data 11 of the display element on the difference image data.
Are held as shown in the example of FIG. However, they may not match due to the positional relationship between the display panel and the photoelectric conversion input unit 3 in terms of distance and angle. In the present embodiment, the display element of the approximate position data 11 having the shortest distance corresponds to the pixel position of the lighting position data 9 and specified. In the example of FIG. 6, the display element number 1 (205, 77) corresponds to this. For all the lighting position data, the display element specified by this processing is determined to be lit, and is held as the determination result 13.

The comparison / recognition unit 16 reads the state of the display element described in the reference state description unit 14 and compares it with the determination result 13 to determine whether or not there is a match, and outputs the comparison result 17 to the result output unit 18. Output.

[0015]

As described above, according to the present invention, a plurality of display elements on a display panel can be specified and the display can be determined, so that the operation state of the object can be automatically recognized.
This has the effect of increasing speed and improving accuracy by automation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a display panel.

FIG. 3 is a diagram illustrating an example of image data.

FIG. 4 is a diagram illustrating an example of a difference image.

FIG. 5 is a diagram illustrating an example of two-dimensional display of a difference image.

FIG. 6 is a diagram illustrating an example of approximate position data.

FIG. 7 is a block diagram showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Video input instruction part 3 Photoelectric conversion input part 5 Image memory 6 Difference image generation part 8 Element extraction part 10 General position holding part 12 Element specification part 14 Reference state description part 16 Comparison recognition part

Claims (1)

(57) [Claims] 1. An image input instructing unit for instructing an input of a display panel image of a target object, a photoelectric conversion input unit for converting and inputting an image into image data according to the input instruction, and holding a plurality of the image data for each input instruction A panel display state recognizing device including an image memory for performing a difference image generation and a difference image generating unit for generating a difference image between two image data selected from the image memories. An element extraction unit that extracts all display elements in a certain lighting state and stores lighting position data; (B) a general position holding unit that stores general position data of all display elements on the image data; An element specifying unit that determines display of the display element by comparing the lighting position data with the approximate position data to determine the display element and holds the determination result; and (D) an object at the time of the input instruction A reference state description unit that describes and holds the reference display state of the display element corresponding to the operation state as reference state data, and (E) performs a pass / fail comparison judgment between the reference state data and a judgment result for all display elements. A panel display state recognizing device, comprising: a comparison recognizing unit for recognizing an operation state of an object and holding a comparison result, and (F) a result output unit for outputting and recording the comparison recognition result on a screen. .