JPS62135972A - Inter image document page continuous scroll display system - Google Patents

Abstract

PURPOSE:To attain the display ranging to two pages by providing a frame memory to accommodate the image information three pages or above, reading the page continuously in a ring shape and cutting out and displaying a part in it. CONSTITUTION:One page of a document is the image information expressed by the square area of a VX dot in a lateral direction and a VY dot in a longitudinal direction and a display screen is for one page. A frame memory has 3.VX.VY dots and can store three pages. For reading a memory to display, respective pages are connected, the final edge of the third page is connected to the starting edge of the first page and reading can be read in a ring shape. The cutting for display can be shifted upwards and downwards and right and left in the frame memory, the VX.VY dot for one page is cut out and displayed from an optional line. At the time of the scroll, the whole body comes to be ring-shaped and therefore, the dot is continuously displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic filing device that stores/retrieve document image information as is, and particularly relates to a method for displaying documents on a display device.

(Prior art) Conventionally, the display method on the display device of this type of electronic filing device is to make one page of the document correspond to one screen of the display device, and to display the next page, the entire screen is rewritten. The method is known.

(Problems to be Solved by the Invention) In the conventional display method described above, one page of a document corresponds to the display screen, so it is difficult to rewrite between the display of the current page and the display of the next page. It takes a long time and forces the operator to interrupt his or her thinking.Furthermore, it has the disadvantage of requiring frequent rewriting when mutual references are required between consecutive pages. be.

An object of the present invention is to provide a frame memory capable of storing image information consisting of three or more pages of documents, and to cut out a rectangular area of a display portion in order to generate a video signal from the frame memory to a display device. To provide a continuous scrolling display method between pages of an image document configured to wrap around the upper and lower ends and left and right ends of a frame memory.

(Means for Solving the Problems) The continuous scroll display system between pages with image defects according to the present invention is constructed by including a frame memory, an extraction means, a folding means, and the like.

The frame memory is capable of storing three or more pages of image information per sentence.

The cutting means is for cutting out the top portion of the table as a rectangular area in order to generate a video signal from the frame memory to the display device.

The folding means is for folding back the cutting out of the rectangular area by the cutting means at the upper and lower ends and the left and right ends of the rectangular area of the frame memory.

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

FIG. 1 is an explanatory diagram illustrating the principle of a continuous scroll display system between image document pages according to the present invention. Figure 2 (
A) indicates one page of the document.

This is image information expressed as a rectangular area with Vx dots in the horizontal direction and vy dots in the vertical direction.

FIG. 1 CB> is a diagram showing the contents of the frame memory when the page is scrolled continuously in the vertical direction. In FIG. 1(B), 1 to 3 indicate three document pages, and a rectangular area surrounded by a large solid line frame (hereinafter, display rectangular area 4
) indicates the part Z to be displayed on the display device.

The display rectangular area 4 is configured to be able to move arbitrarily in the vertical direction in the middle of the frame memory, and to be folded back at the top and bottom ends.

When folded back, the lower part of the document page 3 is displayed at the upper part of the display square area 4, and the upper part of the document page 1 is displayed at the lower part of the display square area 4.

FIG. 1 (IJ) is a diagram showing the contents of the frame memory when the page is continuously scrolled in the horizontal direction. In FIG. 1(0), 1 to 3 indicate document pages of three pages, and a rectangular display area A surrounded by a large solid line frame indicates a portion to be displayed on the display device. Display square area 4
can be moved arbitrarily in the frame memory, and is configured to wrap around the left and right edges. When folded, the right side of the illiterate page 3 is displayed on the left side of the display square area 4, and the left side of the document page 1 is displayed on the right side of the display square area 4.

FIG. 2 is an explanatory diagram showing the relationship x between a rectangular area and physical memory when used as a frame memory rectangular area. FIG. 2(5) is an explanatory diagram showing a rectangular area 7 made up of m blocks in the horizontal (X) direction and n bits (dots) per block. FIG. 2 (E3) is an explanatory diagram showing the physical arrangement of the image information constituting the rectangular area on the frame memory. As you can see from Figure 2,
Image information is stored in the physical memory by arranging n bits (dots) as one word horizontally from left to right and from top to bottom.
is stored.

FIG. 3 is a conceptual diagram of a specific operation for vertically scrolling a document page. In FIG. 3, the frame memory has a rectangular structure in which three document pages 1 to 3 are arranged vertically, and a rectangular display area 4 can be cut out to the display device by allowing space between the pages. can.

The display shadow area 4 in FIG. 3 shows a state in which document page 3 is folded back to document page 1. In this case, in order to configure the display rectangular area 4, data is read out from the frame memory in the following order. There is a need.

First, from the horizontal line containing the starting point address (Vs) of the display rectangular area 4 to the horizontal line containing the starting address (F'ME)Y of the last horizontal line physically present on the frame memory, Spill out the frame memory word. The above is the read operation for the portion belonging to document page 3.

At step i2, the address of the frame memory is changed to the start address (FM8) of the frame memory, and the words of the frame memory are continuously read out up to the lowest horizontal line of the display rectangular area 4. The above is the read operation for the portion belonging to document page 1.

The total number of horizontal lines in the first and second operations is equal to the number of horizontal lines (Vy) in the display rectangular area 4. Third
In the figure, the horizontal size of the frame memory (FMx) and the horizontal size of the display rectangular area (Vx) are equal.

FIG. 4 is an operational conceptual diagram showing horizontal scrolling of the document page. In FIG. 4, the frame memory is constituted by a rectangular area in which three document pages 1 to 3 are arranged horizontally. can.

In FIG. 4, the display rectangular area 4 is shown folding back from the document page 3 to the document page 1.

In this case, in order to configure four display square areas, it is necessary to output data Y[ from the frame memory in the following IIm order.

First, the candy is drawn from the horizontal line containing the starting point address (Vs) of the lower clothing square area, but the number of consecutive non-folding words (Vs)
After reading the number N ), the address is subtracted by an amount corresponding to the horizontal size (FMx) of the frame memory, and the folded portion is continuously read from the start address (FMs) of the frame memory. The number of words for wrapping is the number of horizontal words (VX) of the display square area 4 minus the number of non-wrapping words (VN) l. The above shows operation 7 of the top line.

Second, the same operation as the first operation is repeated for the number of horizontal lines (Vy) of the display rectangular area 4.

The above is just a demonstration of the operation except for the top line.

FIG. 5 is a circuit block diagram illustrating an embodiment of the continuous scroll display method for displaying the amount of image documents according to the present invention. FIG. 5 shows a concrete implementation of the operations shown in FIGS. 3 and 4.

In Figure 5, frame memory horizontal size register 1
1, frame memory start address register 12, display rectangular area start point address register 13, display rectangular area last line start address register 14, display rectangular area horizontal size register 15, display rectangular area horizontal line number register 1
6, and display rectangular area horizontal non-wrapping word count register 1
7 are FNx and FMs in Fig. 3 and Fig. 4, respectively.
.

vs * FM E l ”X I Vy * 'J-
') D K vN Y This is a register that stores the operation parameters of this circuit and is set by the higher-level function.

The adder 18, the subtracter 19, the multiplexer 23, and the address save register 24 are all used to update the frame memory address counter 25 by 8'yk.

The horizontal size counter 20, line number counter 21, non-folding word counter 22, and comparator 26 are all provided for folding.

Frame memory address game) 281d, frame memory address path 581/C transfer 1tj, contents of frame memory address counter 25, frame memory 30
”% accessed.

The read data read out onto the signal line 59 from the frame memory 30 is set in the display data shift register 29 and sent to the display serial signal line 56.

Control signal generation circuit 27 provides control signals to various components of the circuit and receives status signals from the various components.

The control signal is sent out as follows. The information set signal sent from the display square area horizontal size register 15 to the horizontal size counter 20 via the signal line 35 is sent on the signal line 39, and the countdown signal is sent on the signal line 40.

Display square area horizontal line number register 16 to signal line 36
The information set signal sent to the line number counter 21 via the line number counter 21 is sent to the signal line 42, and the countdown signal is sent to the signal line 43.

The information signal number sent from the non-folding word count register 17 to the non-folding word counter 22 via the signal line 37 is sent to the signal line 45, and the countdown signal is sent to the signal line 46. 5 types of input signals (signal line 32,
33, 60, 61.63) Signal line 48
The multiplexer 23 operates according to the above selection signal.

The output signal sent from the multiplexer 23 to the frame memory address counter 25 via the signal line 62Y is set to the set signal on the signal line 49 and the address up signal on the signal line 51 in the counter. The address save register 24 is set by the set signal 52 on the signal line 52. A read signal on signal line 53 causes frame memory address gate 28 and frame memory 30 to perform a read operation. The display data shift register 29 is operated by the set signal on the signal line 54-hi and the shift signal on the signal line 55, and the bladder removal data from the frame memory 3o onto the signal line 59 is sent onto the signal line 56.

A status signal is sent from each element in FIG. 5 to the control signal generation circuit 27. That is, a value zero signal from the horizontal size counter 20 onto the signal line 41, a value zero signal from the line number counter 21 onto the signal line 44, a value zero signal from the non-folded word number counter 22 onto the signal line 47, and a comparator. The match signal from 26 onto signal line 50 is the status signal.

6 and 7 are a flowchart showing the control signal generation operation of the control signal generation circuit 27 shown in FIG. 5, and an explanatory diagram showing the circuit operation, respectively.

(Effects of the Invention) As explained above, the present invention arranges document pages vertically or horizontally in a frame memory having a capacity capable of storing image information of three or more document pages, and displays the image information on a display device. When cutting out the display rectangular area for generating a video signal, by configuring it to wrap at the top and bottom edges and left and right edges of the document arranged vertically or horizontally in the frame memory, continuous document pages can be cut out. The screen of the display device can be displayed continuously at page boundaries without being completely rewritten.
This has the advantage that document pages not included in the display rectangular area can be prepared in parallel while the operator is looking at the screen.

In addition, as shown in the circuit block diagram of an embodiment of the present invention, the configuration of an arbitrary frame memory, the size of the display rectangular area, and the position fff'
It is possible to specify Y.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing principle 7 of the continuous scroll display method for image documents according to the present invention. FIG. 2 is an explanatory diagram showing the relationship 7 between the rectangular area of the frame memory and the physical memory. FIG. 3 is a conceptual diagram showing specific operation 7 of vertical scrolling of a document page. FIG. 4 is a conceptual diagram showing a specific operation of horizontal scrolling of a document page. FIG. 5 is a circuit block diagram showing an embodiment of the continuous scroll display method for image documents according to the present invention, and FIG.
5 is a flowchart of the control signal generation operation of the signal generation circuit, and FIG. 7 is an explanatory diagram of the operation of the control signal generation circuit shown in FIG. 5. 11...Frame Memory horizontal size register 12...
-Frame memory start address register 13...Display square area start point address register 14...Display square area last line start address register 15...Display square area horizontal size register 16...
Display square area horizontal line number register 17...Display square area horizontal non-wrapping word number register 18...Adder 19...Subtractor 20...
・Horizontal size counter 21...Line number counter 22...Non-folding word number counter 23...Multiplexer 24...Address save register 25...Frame memory address counter 26...
Comparator 27...Control signal generation circuit 28...Frame memory address scale) 29...Display data shift register 30...Frame memory 31-56.58-63...Signal line diagram 3 Figure 4

Claims (1)

[Claims] a frame memory having a capacity capable of storing image information of three or more pages of a document; a cutting means for cutting out a display portion as a rectangular area in order to generate a video signal from the frame memory to a display device; A method for displaying continuous scrolling between pages of an image document, comprising folding means for folding back the cutting of the rectangular area by the cutting means at the upper and lower ends and left and right ends of the rectangular area of the frame memory.