JPH01236773A - Dot picture part expanding and display system - Google Patents

Abstract

PURPOSE:To easily designate a dot address and to improve the operability of a system by displaying the expanded image of a part touched on a touch screen of dot picture data stored in a picture memory. CONSTITUTION:Dot picture data in a part corresponding to the address touched on a touch screen 2 out of picture data stored in a picture memory 5 in a dot picture part expanding and display system is expanded and developed in an expanded dot picture part memory 7 by a reading means 9 and the writing part of a writing/reading part 11 which are operated under the control of a control means 13 responding to the touch address. During read of the expanded developed area of the expanded dot picture data part memory 7, read of the picture memory 5 is inhibited, and read of the expanded dot picture part memory 7 except this read is inhibited, and the picture memory 5 is read. Then, the dot picture part corresponding to the touched address is displayed on a screen.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Conventional technology Problems to be solved by the invention/Means for solving the problems Principle block diagram of the present invention (Fig. 1) Action display device screen A diagram showing the relationship between the dot coordinates and the touch screen coordinates of the touch screen (Figure 2) A diagram showing the relationship between the dot coordinates and the touch screen coordinates (Figure 3) A display example of the enlarged display area and its touch screen coordinates (Fig. 4) Example An embodiment of the present invention (Fig. 5) Correspondence diagram between CRT screen and RAM (Fig. 7) Effects of the invention [Summary] Touch on the screen during display Concerning a method for displaying a corresponding enlarged image part within the screen using screen addresses (coordinates), for the purpose of selecting an enlarged display of an image part, a display device having a touch screen, a screen memory, and an enlarged dot image are provided. A partial memory, a reading means for the screen memory, a writing/reading means for the enlarged dot image partial memory, and a control means are provided, and the control means reads the enlarged dot image data of the enlarged dot image partial memory on the screen. The reading means and the writing/reading means are controlled to replace the dot image data in the memory with predetermined corresponding dot image data, and the dot image data is enlarged and displayed on the touch screen of the display device.

[Industrial application field]

The present invention relates to an image partial enlargement display method that can display an enlarged image portion within a screen that is being displayed using designated image portion addresses (coordinates) within the screen.

There are various types of image display devices available.

For example, a video signal connected to a communication line and transmitted through the communication line is displayed on an image display device provided in a terminal. Although such image display devices have conventionally been used for mere display, it is being considered to expand their use. One problem in this case is how to identify and recognize a specific position on the screen in a conversational communication system.

[Conventional technology]

A relatively easy means to recognize such a specific screen address is to use a keyboard, mouse, or touch screen provided on the image display device. Among them, screen address recognition using a keyboard and mouse involves using a cursor as a drawing control means to move the cursor to a desired position by operating the keyboard or mouse (coordinate data for displaying the cursor). This method allows the device to recognize the screen address from the location of the screen. In addition, by touching the screen address of the touch screen placed on the screen being displayed with a finger, the touch screen receives the address of the touched image part, for example, the deflection coordinate signal of the CRT corresponding to the touch area and the touch screen. The device attempts to recognize the signal from the source.

[Problem to be solved by the invention]

In the above-described technique of using a keyboard and a mouse as means for screen address recognition, the cursor must be manually moved each time a screen address needs to be recognized. This operation is not only complicated, but also takes time to move the cursor.

Further, the technique using a touch screen does not require the movement of a cursor, so there is no disadvantage associated with it, but since the screen address is specified with a finger on the touch screen, it is impossible to specify a dot address on the screen. Therefore, for usage types where screen addresses must be specified by dot addresses, the purpose cannot be achieved by simply applying this technique using a touch screen.

The present invention was created in view of such problems, and an object of the present invention is to provide an image partial enlargement display method that can enlarge an image portion using a touch screen.

[Means to solve the problem]

FIG. 1 shows a block diagram of the principle of the present invention. As shown in this figure, the present invention includes a display device 3 having a touch screen 2, a screen memory 5, and an enlarged dot image portion memory 7 for storing the enlarged dot image portion data of the screen memory 5. , a reading means for the screen memory 5, a writing/reading means 11 for the enlarged dot image partial memory 7, and a control means 13. This control means 13 controls the reading means 9 and the writing/reading means to expand and expand the corresponding dot image partial data in the screen memory 5 to the enlarged dot image partial memory 7 in response to a touch address on the touch screen 2. After the data is generated in the reading means 11, the reading means 9 controls to replace the enlarged dot image data in the enlarged dot image partial memory 7 with predetermined corresponding dot image data among the dot image data in the screen memory 5.
and the display device 3 caused by the writing/reading means 11
The dots are enlarged and displayed on the touch screen 2, or an arbitrary enlarged display area of the dots is selected via the touch screen 2.

[For production]

Among the dot image data stored in the screen memory 5, the dot image partial data corresponding to the address touched on the touch screen 2 is read out by the reading means 9 and the writing/reading means operated under the control of the control means 13 responsive to the touch address. The writing portion of the means 11 enlarges and develops the image into the enlarged dot image portion memory 7.

The control means 13, which has entered the display operation, controls the readout portions of the readout means 9 and the write/read means 11 as follows for the enlarged dot image partial data.

That is, while the enlarged expansion area of the enlarged dot image partial memory 7 is being read, reading of the screen memory 5 is prohibited.

In cases other than this continuous display, reading from the enlarged dot image partial memory 7 is prohibited and reading from the screen memory 5 is caused.

Therefore, the dot image portion corresponding to the touched address is enlarged and displayed on the screen, so that the dot address can be specified.

The number of dots in the horizontal direction is k and the number of dots in the vertical direction is l, and the coordinates of a dot on the display screen are (x, y), and the touch coordinates (address) touched on the touch screen 2 when enlarging the dot image signal are (X.

Y), and the coordinates of the enlarged display area of the touched dot within the area where each dot is enlarged a times as much as (X', Y')
Dot coordinates (x, y) and touch coordinates (X, y) when the enlarged display area is set to the lower left corner of the display screen.
The relationship between the dot enlarged display area coordinates (X', Y'') is given by the following formula %)).In addition, when the enlarged display area is set at the upper right corner of the display screen, ,X + When the area is set at the lower left corner of the display screen, it is given by:

For example, the screen coordinates of the display device 3 are 640 in the X direction, as shown in FIG. 2, and 640 in the X direction! =400, and the touch address on the touch screen 2 mentioned above is X=1. By touching Y=2 (see Figure 3), the touch address area is enlarged 16 times (a=16) at the bottom right of the screen as shown in Figure 4, and the dot enlarged display area consisting of it, that is, Select the dot enlarged display area (fourth) within the enlarged display area A on the touch screen 2
Shaded area in diagram. The shaded area is the shaded area (x=2
0. y=37). ) (The touch address coordinates are X' = 28.Y' = 14.), then from the above formula, x = 16X + (X'-24)-2
It is obtained as 0 y=16Y+(Y'-9)=37 and can be used for the machine.

[Example] FIG. 5 shows an example of the present invention. In this figure, 2
0 is a communication line, 22 is a modem (MODEM), and 24 is a buffer. 5A is a video RAM (bitmap memory), and this video RAM 5A stores its access unit,
For example, video data in bytes is written sequentially at a write address provided via selector 26 as described below, and sequentially at a read address provided via selector 26 when the device is in display mode as described below. Read out. 7A is a RAM (corresponding to the enlarged image partial memory 7 in FIG. 1), which is used to read data from the video RAM 5A in read control for enlarged display of the touch address area of the touch screen 2, which will be described later, in the read control of the video RAM 5A. The dot image signal is stored in RAM.
RAM determined by the output address of address counter 40
It is written in the window writing area (enlarged expansion area) of 7A. The written window is stored in the video RAM corresponding to the window in enlarged display control mode.
5A and is given to the CRT controller 4 in place of the video data. Each of the dot image signals of the video RAM 5A and RAM 7A has a one-to-l correspondence with each corresponding pixel area on the screen of the CR7 display device 3A, as shown in FIG. However, the relationship between screen coordinates and touch screen coordinates in FIG. 6 is the same as in FIG. 2.

The output of the CRT controller 4 is supplied to the CR7 display device 3A. CR7 display device 3A has touch screen 2
is placed on the screen.

Address data from this touch screen 2 is input to a central processing unit (CPU) 30 via a register 2. Also, from the touch screen 2, a signal line 32 for mode 1 and a signal for mode 2! fA 34 is connected to central processing unit 30.

36 is an AND gate that supplies the clock signal from the reference clock generator 38 to the video RAM 5A under the control of the central processing unit 30. Similar to the AND gate 36, the AND gate 38 sends the clock signal to the RAM 7A and the RAM 7A.
The AND gate 42 supplies the clock signal via a frequency divider 44 to an X counter 46 and an X address counter 48 whose carry output is connected to the reset input.

50 is an X address register, 52 is a Y address counter, and like the X address counter 48, these are under the control of the central processing unit (CPU) 30 and read out the address determined by a touch on the touch screen 2. Start coordinate address (X.

Y)) is initially set.

The carry output of the X counter 46 is supplied to the count input of the X counter 54 whose own carry output is connected to the reset input, and the set input of the X address counter 48. Supplied to count input. counter 5
The carry output of 6 is given to the central processing unit 30.

Central processing unit 30 also receives signals from modem 22 on line 62. Further, the central processing unit 30 connects lines 64, 65,
A control signal is output on the bus 66, 67, and 70, and the above-mentioned read start coordinate address and expansion start coordinate address are output on the bus 68. The control signal output on line 64 is always at the HI+ level during writing to video RAM 5A and expansion from video RAM 5A to RAM 7A, but during reading to CRT controller 4, RAMTA
Only the period corresponding to the readout of the enlarged dot image signal storage area within is set to the "L11 level," and the time zone excluding the period corresponding to continuous reading is also set to the "H11 level." The control signal on line 70 is a selection signal, and this selection signal causes VRAM address counter 72 or decoder (D
EC) 74 address is given to the video RAM 5A. Decoder 74 receives the outputs of X address counter 48 and Y address counter 52. The RAM address counting section 40 includes the above-mentioned X address counter 4, X address register 50. Y address counter 52. X counter 46.
X counter 54. It has a similar configuration to the decoder 74,
The dot image signal read out from the video RAM 5A is
It generates an address signal for expanding to AM7A and causing its display.

In the above configuration, the CR7 display device 3A is used as the display device 3 in FIG. 1, and the video RAM 5A is used as the screen memory 5 in FIG.
The RAM 7A corresponds to the enlarged image partial memory 7 in FIG. VRAM RAM address carantuff 2 unit 44. X
Counter 46. X counter 54. X address counter 4
8. X address register 50. Y address counter 52
．． The decoder 74 and the selector 26 correspond to the reading means 9 in FIG. The RAM address counting section 40 is the first
This corresponds to the write/read means 11 in the figure. register 28,
CPU30, AND gate 36, 38.42, line 64.
66, To, bus 68, and counter 56 correspond to the control means 13 in FIG.

The operation of the device under the above configuration will be explained below. However, this is an example in which each dot image signal in an address area determined by a touch on the touch screen 2 in the video RAM 5 is expanded to 16×16. Therefore, X counter 46, X counter 54, and counter 56 are 4-bit counters. Frequency divider 44 is configured as a 1×16 frequency divider.

Video signals received via communication line 20 and output from modem 22 are transmitted from central processing unit 30 on line 6 in response to control signals provided on line 62 upon receipt thereof.
After being stored in the buffer 24 under the control signal outputted to the video RAM 5A, the video RAM 5A is sequentially read out from there in units of access to the video RAM 5A, and is being supplied with a clock signal via the AND gate 36. 2. %?
! V given via selector 26 with the signal on 70
The count value of the RAM address counter 72 is sequentially written into the address area. Thereby, the received image is developed in the video RAM 5A.

Prior to the enlargement, the central processing unit 3
is set in the X address register and Y address counter corresponding to the above-mentioned X address register 50 and Y address counter 52 via the bus 68. For example, when the enlarged display area is set to the lower right corner as shown in FIG. 4, the expansion start coordinates are given as (143, 383).

After the dot image signal is stored in the video RAM 5A in this manner, the corresponding area on the touch screen 2 is indicated with a finger in order to recognize the dot address. The address data touched from the touch screen 2 is set in the register 28, and mode 1 is displayed on the line 32.
A signal is output. As shown in FIG. 7, the touch address is X=23. Let Y=9. The central processing unit 30 that receives the mode 1 signal takes in the address data in the register 28 and determines a window surrounding the coordinates indicated by the address data. This window is a coordinate range to be enlarged and displayed, and its size is set to a predetermined size, for example, the above-mentioned 16×16 dot size. The X address (383) of the readout start coordinates of the coordinate range determined in this way (i.e., the window position on the screen) is set in the X address register 50, and is preset in the X address counter 48, and the Y address of the readout start coordinates is set in the X address register 50. (144) is preset in the Y address counter 52A. From these two addresses, the RAM is
Window data enlarged and generated on TA is video RA
It is determined so as not to overlap with the original position of M5A.

The value of the X address counter 48 is 1/16 frequency divider 44
The count is counted up by the reference clock signal whose frequency is divided by 16 from .

Therefore, the following data is read from the video RAM 5A. That is, the Y-axis address position specified by the Y-address counter 52 in the video RAM 5A to which the reference clock signal is supplied, and
The dot image signal of the video RAM 5A designated by I directly in the column number 8 is read out 16 times in succession, and each dot image signal is in a one-to-one correspondence with the video RAM 5A.
The data is written to M7A under the control of the RAM address counting section 40. That is, during the reading of the same dot image signal 16 times from the RAM address counting section 40, as shown in FIG.
16 address signals (y
, x) are generated sequentially.

Therefore, if you look at this on the screen (RAM7A), Figure 7 (B
), the same dot image signal is written into the first line storage area portion IL of the RAM 7A designated by the address signal. Then, the same operation is repeated 15 times for each successive dot image signal, that is, the remaining 15 dot image signals, and similar writing to the RAM 7A is sequentially performed (FIG. 7(B)). IL,
etc.). The end is notified by the X counter 46.

In other words, the carry main force from the 4-bit X counter 46 is
The address counter 48 is returned to the preset state using the value of the X address register 50, and the value of the 4-bit Y counter 54 is incremented by one. The same thing occurs in the corresponding X address counter and Y counter of the RAM address counting section 40.

Then, in the same manner as described above, each dot image signal in the next line (16 dot image signals) is sequentially and repeatedly read 16 times from the video RAM 5A and written to the RAM 7A. Similar read and write operations are then performed sequentially for each of the remaining 14 lines. At the end of the enlargement and expansion operation for each dot image signal in each line, the 4-bit Y counter 54 is incremented by one. That is, 16 of the 4-bit Y counter 54
When the count-up is performed, that is, the video RAM 5A specified by the XY address of the readout start coordinate is
Each line within the coordinate range within is 16X within RAMTA
Each time the data is expanded into the 16 address area, the 4-bit Y address counter 52 and the 4-bit counter 56 are counted up by one. This relationship also applies to R.A.
The same applies to the M address count section.

1 on the same Y coordinate in the video RAM 5A specified by the updated value of the 4-bit Y address counter 52 as described above.
The 6-dot image signal is transferred to RAMT according to the above explanation.
Expanded on the next line (16x16) in A.

The same thing can be done with the 4-bit Y address counter 52.
video RAM 5 when generated for each update of
The 16x16 dot image signal on A is (lx16)x (I
X16) dot image signal storage area (R1 in FIGS. 4 and 7 is 16 times larger than Ql).

The end signal is given to the central processing unit 30 in advance at the start of expansion for the final line of 16×16, that is, when the carry output of the counter 56 is received.

The image is displayed as follows after being enlarged and expanded into the RAM 7A as described above.

When this display is entered, the central controller 30 changes the signal on the line 64 to "L
level. Outside of this time period, the signal on line 64 is H+
+ level.

Therefore, when the reading of the video RAM 5A and the display on the CRT screen progress and the reading of the video RAM 5A corresponding to the first line of the enlarged dot image signal storage area of the RAM 7A is started, the reference clock signal is supplied to the video RAM 5A by the AND gate. 36 is opened, and its reading is stopped. However, the counting operation of the VRAM address counter 72 based on the reference clock signal continues.

At this time, the RAM address counting unit 40 sequentially generates an X address signal of 16×16 for the first line by closing the AND gate 38, and
This causes reading of the first line of the enlarged bit image signal storage area. The 16×16 dot image signal thus read out is transferred to the CRT controller 4 instead of the corresponding dot image signal from the video RAM 5A and is
displayed on the T screen.

At the end of the display of this enlarged dot image portion, the AND gate 36 is closed and the AND gate 38 is opened again, and the display from the dot image signal advanced by 16x16 of the lines read out from the video RAM 5A becomes C.
It is generated on the RT screen. Thereafter, similar read-out display is continued from the second line to the 16th line.

From the next line, ie, the 17th line, normal reading from the video RAM 5A and display are performed.

When the enlarged dot display area of the touch screen is touched, address data is set in the register 28 and a mode 2 signal is transferred to the central processing unit 30 via the line 34. Mode 2
In response to the signal, the central controller 30 reads the address data in the register 28, uses this address data, the enlarged display area position, and the address data read in mode 1 to determine the touched address as described above.
The address is output to the communication line 20 via the line 67 and the modem 22.

In addition, in the above embodiment, the video RAM 5A and the RAM
Although an example in which there is a one-to-one correspondence with 7A has been described, it is clear from the above description that the present invention cannot be implemented without this correspondence. Also, counter 4
Similarly, it is not necessary that the frequency divider 6, 54, 56 and the frequency divider 44 be of the above-mentioned size.

Furthermore, the RAM is large enough to accommodate the enlarged dot image portion without using video RAM 5A and RAM 7A of the same size.
M is prepared, an enlarged dot image portion is generated in this RAM in the same manner as described above or by software processing, and then this is transferred and stored in an area of the video RAM 5A that does not overlap with the touch coordinates. The image may be displayed on a CRT screen or the like.

〔Effect of the invention〕

As described above, according to the present invention, an enlarged image of the portion touched on the touch screen can be displayed. Therefore, the dot address can be specified easily.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a diagram showing the relationship between dot coordinates on the display device screen and touch screen coordinates on the touch screen, and FIG. 3 is a diagram showing the correspondence between dot coordinates and touch screen coordinates. FIG. 4 is a diagram showing a display example of the enlarged display area and its relationship with the touch screen coordinates, FIG. 5 is a diagram showing an embodiment of the present invention, and FIG. 6 is a diagram showing the dot image signal storage position of the video RAM and CR.
FIG. 7 is a diagram showing the correspondence between dot coordinates on the T screen and touch screen coordinates. FIG. 7 is a diagram showing the correspondence between the CRT screen (dot coordinates and touch screen coordinates) and the RAM. 1 and 2, 2 is a touch screen, 3 is a display device (CRT display device 3A), 5 is an image memory (video RAM 5A), and 7 is an enlarged image partial memory (RA).
M7A), 9 is a reading means (VRAM address counter 72, frequency divider 44, X counter 46, Y counter 54,
X address counter 48, X register 50, Y address counter 52, decoder 74, selector 26);
0), 13 is a control means (register 28, CPU 30, AND gates 36, 38, 42, lines 64, 66, 70, bus 68
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Claims (1)

[Claims] (1) Display device (3) with touch screen (2)
and a screen memory (5); an enlarged dot image partial memory (7) for storing enlarged image partial data of the image partial data of the screen memory (5); and a reading means (9) for the screen memory (5). ), write/read means (11) for the enlarged dot image partial memory (7), and control means (13), the control means (13) being configured to control the touch screen (2).
The reading means (9) controls to enlarge and expand the corresponding dot image partial data in the screen memory (5) to the enlarged dot image partial memory (7) in response to a touch address on the screen memory (5).
) and the writing/reading means (11),
The reading means (9) and the writing/reading unit control to replace the enlarged dot image data in the enlarged dot image partial memory (7) with predetermined corresponding dot image data among the dot image data in the screen memory (5). Means (1
1) A dot image partial enlargement display method characterized in that the dot image is enlarged and displayed on the touch screen (2) of the display device (3).