JPS60227290A - Dynamic matching method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and apparatus for dynamically aligning a video monitor display image to a fixed reference frame.

(Prior Art) When using a video monitor of a computer system, a touch input function is provided so that the user can touch a point on the monitor screen with a finger or the like to make a selection or supply input data to the computer system. Often desirable. The position on the screen that the user touches corresponds to the indicator on the display image, and when the user's finger or the like interrupts one or more light beams passing through the space adjacent to the indicator on the video screen, the input data is occurs. For example, a grid of multiple intersecting light beams may be used, with each beam having an emitter at one end and a receiver at the other end, such that interruption of the beam by a user's finger can be detected. There is. The light beam typically utilizes light energy in the infrared region of the spectrum.

Clear resolution of input data provided through a touch input device requires that there is no fixed frame of reference between the light beams that are interrupted when the user points to a specific portion of the display screen. Must not be.

However, due to various reasons, the video display screen may become misaligned with respect to the spatially fixed grid light beam mounted on the surrounding grooved frame. Such positional deviations occur in the vertical and horizontal directions. When the misalignment exceeds a small value, errors may occur in data entry. This is because when a user touches a predetermined point on the video display screen, the light beam correctly associated with that point is not interrupted. If other light beams are interrupted by touch input, errors will occur in the data. Even if a touch input device does not use a light beam, its fixed relationship to the monitor screen makes it desirable to maintain a fixed relationship between the screen and the displayed image. Accordingly, it would be desirable to provide an apparatus and method that ensures a fixed frame of reference for the display screen of a video monitor and the grid light beam of a touch-sensitive input device.

OBJECTS OF THE INVENTION The primary object of the present invention is to provide an apparatus and method that ensures a fixed relationship between the display screen of a video monitor and the physical space surrounding such a monitor.

Another object of the invention is to provide a simple and economical device and method that performs the above functions.

Another object of the invention is to provide a means for easily checking the correct size and linearity of rasters on a monitor screen.

Advantages of the Invention The present invention achieves the advantage of maintaining a fixed relationship between the information displayed on the monitor and the area of the touch input device that is spatially fixed with respect to the monitor. Any effects that may shift the point on the monitor display screen, such as aging of components, differences in the earth's magnetic field, changes in magnetization of the container, etc., are immediately compensated for and the displayed image remains in a fixed position.

SUMMARY OF THE INVENTION According to one embodiment of the present invention, there is provided an apparatus for displaying a test pattern on a video monitor at an edge between an image area and a grooved frame; Photosensitive means is provided for generating an electrical signal in response to the

The timing of the signals associated with displaying the test pattern is
Determine whether the image position is accurate or that the image needs to be moved in a predetermined direction to return to a fixed position.

(Example) The present invention will be described in detail below based on an illustrated example.

In FIG. 1, a video monitor 10 is illustrated having a display screen on which a video image 12 is displayed. The display screen is surrounded by a grooved frame 14 that extends forward from the front of the monitor and houses photoelectric generators and photodetectors that form the grid light beam of the touch input device. . Since the details of the touch type input device are not related to the present invention, a detailed description thereof will be omitted.

A border 16 surrounds the monitor image area 12 within the grooved frame 14. Such a border 16 is typically provided on video monitors of computer systems to clearly indicate to the user that the entire image area [2] is being displayed.

As shown in FIG.
The test pattern consists of five dots arranged in two columns, one horizontally and one vertically. The center dot corresponds to the exact image position on the monitor, and the other four dots correspond to the correct position, top, bottom, right,
The image positions on the left are shown respectively. Preferably, the test pattern 18 is located adjacent to a corner of the display area 12 so that it does not correspond horizontally or vertically to any part of the image area 12.

In FIG. 2, a portion of the apparatus of FIG. 1 is shown, showing a housing 20 containing the test pattern 18 and the corresponding photoelectric sensor. When the image is accurately positioned on the monitor image, the sensor will align with the center dot of the test pattern 18, and if the test pattern moves from the desired position on the monitor screen, the center dot will align with the photoelectric sensor. It may not match and one of the other dots may match. Each of the five dots in the test pattern has a unique timing with respect to the horizontal and vertical scanning of the video monitor raster, and a comparison of these timings and the times at which the photoelectric sensor pulses Indicates which of the dots matches the sensor. This information may be used to indicate the direction of movement required to bring the image to its desired fixed position, and indicates when the desired fixed position has been reached.

FIG. 4 shows an enlarged view of the test pattern 18, which is on three consecutive scan lines, and the five dots are labeled a through e. Dot C is centrally located with respect to the photoelectric detector or sensor 22, and the other four dots a, b, d and e are located just outside the sensing area of the sensor 22. The image on the video monitor is the sensor 22
One of the other four dots can be sensed by the sensor 22 when the dot is misaligned with respect to the housing 20 to which it is attached. If the image is shifted upwards on the screen, dot e will be detected, and if it is shifted downwards, dot a will be detected.
is sensed. When the image moves to the left, dot d is sensed, and when the image moves to the right, dot b is sensed.

FIG. 3 shows the waveform of the signal applied to the video input of monitor 10 in three scan lines, with time being the independent variable. A pulse corresponding to dot a is applied in the first scan line. In the next scanning line, similar pulses corresponding to dot C are simultaneously applied, and dot C
Two other pulses corresponding to dots b and d are applied to the monitor immediately before and after the pulse. In the third scanning line, a pulse corresponding to dot e is applied at substantially the same time as dots a and C.

In FIGS. 3 and 4, the five dots of the test pattern appear to be continuous on the screen, but in reality they occur separately, so that the pulses sensed by the photosensitive strip 22 are different from each other. A correct image match is determined (when dot C is detected) by observing when it occurs, above, below otherwise.

Image mismatches in the left and right directions are determined separately.

FIG. 5 shows an embodiment of a control system used to adjust the position of the image on the screen of monitor 10 to align dot C with sensor 22. FIG.

Video data to be displayed on the image area 12 of the monitor is applied to a line 24 connected to one input of a gate 26.

Other inputs of gate 26 are connected to a gate array unit 28, such as a programmable logic array (PLA).
When gate 26 is opened by a signal from gate array 28, video data 24 is provided via line 30 and OR gate 32 to line 34 connected to the video input of the monitor. The five dots in the test pattern are OR gate 3
2 and is mixed with the video data and displayed on the screen as a test pattern.

The five dots of the test pattern are sequentially generated by arrays 1 through 1, corresponding to the positions shown in FIG. 1 relative to image 12. For this purpose, gate array 28 is connected via line 38 to a clock generator, via line 40 to a vertical blanking pulse generator, and via line 42 to a horizontal blanking pulse generator. The blanking pulses applied to lines 40, 42 are generated by the video monitor's scanning circuitry and are adapted to blank the screen during the blanking interval of a vertical or horizontal scan.

The pulses are used by gate array 28 to synchronize the generation of signals applied to gates 26, 32 to cause test pattern 18 and image 12 to be placed on the screen in a fixed positional relationship to each other. A storage unit 44 that stores a plurality of flags is further connected to the gate array 28. The flag can be a regular 7 lip or 70 lip.
The set and reset inputs are then connected to the output of the gate array, and the state of the flip-flop is indicated as a signal level on a plurality of output lines 46.

Furthermore, a parameter storage unit 48 is provided, to which a multiplexer 50 is connected to select one of the plurality of parameters and load it into the counter 52.

Multiplexer 50 is controlled by the output from gate array 28 via line 54.

A signal on line 56 connected to the output of gate array 28 loads the contents of the selected parameter stored in storage unit 48 into counter 52, and a signal from gate array 28 via 11A 58 causes counter 52 to count down. When counter 52 goes to O, a 1=signal is generated on line 60 and provided as an input to gate array 28.

The five pulses corresponding to dots a-e are applied to five AND gates 62, each having its second input connected to the output of the photosensitizer 22. When the image position is correct, the sensor 22 is activated in response to only the driver lc, so only the driver lc generates an output pulse. In other cases, one of the AND gates 62a-62e
One or two gates generate pulses which are applied to gate array 28 via line 66. A pulse on line 66 indicates that a position correction is required, and a pulse on line 64 (when there is no pulse on line 66) indicates that the position is correct and no correction is required.

The outputs of Ando Goo 1-62a, b, d, and e are connected to parameter storage unit 48, respectively, and storage unit 4
The image and test pattern on the monitor screen are moved by incrementing or decrementing the appropriate parameters stored in 8. As shown in FIG. 1, the parameters indicate the leftmost position of the combined image 12 and test pattern 18 relative to the end of the blanking interval. By changing parameter K, image 12 or test pattern 18
simultaneously shifts to the left or right. Similarly, parameter J indicates the starting line of test pattern 18. By increasing or decreasing parameter J, image 12 and test pattern 18 simultaneously move up and down on the screen. In one embodiment,
Flag storage unit 44 includes twelve flag storage units, and parameter storage unit 48 stores five parameters J=N. In operation, all flags are initially reset and from the end of the vertical blanking pulse gate array 28 sets flag number 1, which loads counter 52 with parameter J. This corresponds to the number of scan lines from the top of the raster to the top of test pattern 18.

A horizontal blanking pulse is then sent from line 42 to line 58;
Each pulse decrements or reduces the contents of counter 52 by one, and when the contents of counter 52 reaches O, counter 52 sends a signal to gate array 28 via line 60 to reach the top scan line of the test pattern. show something

Next, flag number 2 is set and parameter K is loaded into the counter 52. This corresponds to the number of clock pulses from the left end of the raster to the left end of the test pattern. line 38
The clock pulses from the gate array 28 are counted by the counter 52 and when zero pulses are counted, the clock pulses from the gate array 28
receives a signal on line 60 and sets flag number 3.

Parameter L (FIG. 4) is then loaded into counter 52. The parameter corresponds to the number of clock pulses from the left edge of the test pattern to its center. When the counter 52 reaches O again, the scanning point of the CRT beam or monitor is at the position of dot a, and the gate array 28 generates a pulse on line 36 to monitor and display dot a. urge If necessary, pulses may be generated from the monomulti 37 for a short period. Assuming the image is correctly positioned on the screen, no pulses will be detected by the light sensitive strips and no pulses will be generated on line 66 and operation will continue. Flag number 4 is set and counter 52 loads parameter K when the next horizontal blanking pulse arrives. Clock pulses are then counted by counter 52, after which a pulse corresponding to dot h is generated on line 36. If the image position is correct, no pulse will be generated on this time line 66.

Flag number 5 is set and counter 52 is set to parameter L.
is loaded and counts one clock pulse until the beam is centered on the test pattern. A pulse is then generated on line 36 corresponding to dot C. Flag number 6 is set and counter 52 is again set to the parameter count clock pulses until the beam reaches the dot d position. At this time another pulse corresponding to dot d is generated on line 36. Flag number 7 is set, and when the next horizontal blanking pulse comes, the parameter K is loaded into the counter 52 and the left test (-) clock pulses are passed until the left test (- pattern position) on the third scan line is reached. The flag number 8 is then set, the parameter L is loaded into the counter 52, and the counter 52
counts down and one clock pulse reaches the position of dot e.

At this time, a pulse is generated on the line 36 and a dot e is displayed.

Each time a pulse indicating a dot occurs on line 36, line 64,
66 are checked for a match. If the image position is correct, a pulse will occur on line 64 and not on line 66 during each cycle (between adjacent vertical blanking pulses).

If the image is misaligned, both lines will pulse, or if the misalignment is large, only line 66 will pulse.

After checking the coincidence of dots e, flag number 9 is set and counter 52 is set to parameter M (FIG. 2).

This parameter M corresponds to the number of horizontal blanking pulses between the third line of the test pattern and the top of the image. Next, flag number 10 is set in the next horizontal retrace period, parameter K is loaded into the counter 52, and K clock pulses are counted, but at this time, the CRT beam coincides with the left edge of the test pattern. There is. Flag number 11 is then set and a parameter N (FIG. 2) corresponding to the number of clock pulses between the left edge of the test pattern and the left edge of image 12 is loaded into counter 52. The counter 52 counts down by clock pulses and
When this happens, flag number 12 is set.

When flag number 12 is set, the beam will move to image area 12.
The upper left corner of the screen has been reached, and the gate 26 is opened to output data to the monitor, as before.

Line counter (not shown) for addressing random access memory with subsequent horizontal blanking pulses
is updated, allowing successive lines to be transmitted to the monitor via gate 26. This operation is repeated for each line to be displayed, and the last display line is displayed using the line counter (
(not shown). At each horizontal retrace pulse flags 11 and 12 are reset, so the operation repeats from the setting of flag 10. That is, counter 5
2 is loaded with parameter K, counts clock pulses to the left end of the test pattern, and then counter 52
is loaded with parameter N and continues counting until the left edge of image area 12 is reached. Therefore, each image line is +N
Start from the position determined by .

The first line of the image starts at J+24M,
The second term corresponds to the height of the test pattern 18, one or two scan lines.

Once all lines have been displayed, all of the above operations are repeated starting with the next vertical blanking pulse.

From the above description, it is clear that the parameter J determines the vertical position of the test pattern and image 12, and the parameter J determines its horizontal position.

Therefore, if the gate 62b generates a pulse corresponding to the left position of the image, the signal on one of the lines 68 causes the parameter storage unit 48 to increment the parameter K (by 1) and pulse the image by one clock. Move to the right by a minute. If the image shifts too far to the right, the parameter K is decremented by a signal from the gate 62d.

Similarly, gate 62a.

The parameter K is incremented or decremented by the signal 62d to bring the image to the correct position. By varying the parameters J, K, the test pattern 18 and image area 12 are shifted so that the test pattern and image are held in the correct physical relationship to each other.

If necessary, this fixed position can be changed by changing the parameters M, N that define the image area 12 for the test pattern. This allows the mutual position between the test pattern and the image area to be adapted to the characteristics of any monitor. Additionally, if necessary, dot b in the second scan line of the test pattern.

Parameter L can also be changed to change the horizontal spacing between c and d. Furthermore, the height of the test pattern can be increased by separating the three scanning lines of the test pattern by one or more lines. If necessary, store an additional parameter indicating the spacing between the scan lines of the test pattern and add a counter 5 with the extra parameter.
An additional flag may be provided to perform a countdown of 2.

Although the above description assumes that the test pattern consists of three scan lines, larger test patterns may be used in which each dot occupies part of two or more scan lines. Doing so makes it easier to implement the invention in monitors with very thin, well-defined scan lines. In such a variation, a test pattern may be used, for example as shown in FIG. 6, in which each of the five dots aIel consists of two short dashes of successive scan lines. Alternatively, horizontally and vertically extending dashes or bars may be used to facilitate simultaneous matching in both the X and Y directions. Further, by storing flags in flag storage unit 44 and storing additional parameters in parameter storage unit 48 corresponding to the number of blank scan lines between dot rows of the test pattern, gate array 28 is configured as shown in FIG. You can change it to generate a test pattern. The dot sensing and response thereto is the same as described with respect to FIG. 5, except that each of the gates 62a-62e has an input corresponding to a continuous line. The period of monomulti 37 is adjusted to generate a pulse corresponding to a dash of appropriate length.

From the above description, the method and apparatus of the present invention are effective in maintaining the correct position of image area 12 with respect to the physical space surrounding the video monitor. In this way,
Positional changes caused by aging of components, etc. do not interfere with the correct operation of the touch-type input device attached to the monitor.

The photosensitive strip 22 of the present invention is provided with a signal that maintains a constant image size and may be used to reduce image size variations due to changes in the output voltage of the monitor's power supply. When the power supply output voltage drops, the vertical and horizontal size of the image increases, trying to spread the spacing between the test pattern dots. If the vertical size of the image area decreases so that the photosensitive strip 22 senses three dots a, c, e or s, c, d at the same time, identification of such a condition is used to control the horizontal and vertical sweep amplifier circuits. A signal may also be sent to a device that adjusts the gain to return image area 12 to the proper size. Such an example simply uses conventional feedback techniques and will not be described in detail. If necessary, the parameter J can be changed by the method described above to make the position of the image area accurate.

Although the gate array has been described as an example of the present invention in FIG. 5, the series of operations described above can be performed by a program-controlled microprocessor. Alternatively, individual gates and flips 70 may be used as the gate array 28. Additionally, gates t-26, 32, 62 and gates forming multiplexer 5o may be incorporated into gate array 28. Also, if desired, the register flop or storage unit forming the flag storage unit 1 44 and the counter 52 may be incorporated into the same integrated circuit as the gate array. Although parameter storage unit 48 may also be incorporated into the same unit, it may be desirable in some cases to separate parameter storage unit 48 from gate array 28 to facilitate permanent storage of various parameters and their incrementing and decrementing. . Conveniently, the parameter storage unit 48 is part of the microcomputer's random access memory or read-only memory, and the parameters are incremented and decremented as needed by using a set of registers within such a microcomputer system. I can do it. Alternatively, a separate processor may be used to monitor test patterns and adjust parameters to perform these operations quickly and accurately.

To facilitate the use of the present invention in picture tubes with long afterglow fluorescent characteristics, a differentiator circuit is connected to the light sensitive strip 22 to provide rapid changes in screen brightness instead of an output responsive only to level. A pulse may be generated in response to. For this purpose, conventional circuitry may be connected between the photosensitive strip 22 and the gate 62.

The present invention may be used to stabilize the size of rasters displayed on a CRT screen. To this end, circuitry is preferably provided to adjust the scanning speed of the horizontal scan lines in response to identifying a condition in which one or more rows of the test pattern are displaced from a desired position. Assuming a constant line time, increasing the scan rate will decrease the horizontal and vertical size of the raster, and decreasing the scan rate will increase the size. Preferably, the video amplifier of the monitor has a characteristic that the width of change in scanning speed is substantially constant. That is, the bandwidth is sufficient to accommodate faster scanning speeds, etc. Furthermore, the blanking period is preferably adjusted to maintain the displayed image at the center of the monitor screen. One of the circuit t test patterns that similarly adjusts the spacing between the lines by adjusting the length of the blanking period.
It may also respond to the condition that the book or more rows are not in the bird's position. Such circuits are well known in the CRT art and need only be modified to include components having variable parameters responsive to control signals from the pattern scanning circuit.

It is also within the scope of the present invention to provide two sensors at spaced apart locations on the screen, eg, adjacent the top edge and one side edge. The spacing between the two sensors facilitates increasing the accuracy of keeping the horizontal and vertical dimensions of the raster constant.

The invention may further include three or more sensors at spaced apart locations along the scan line to test, for example, horizontal deflection linearity. The time interval between the arrival times of scan points at spaced apart sensors is proportional to the distance between the sensors under conditions of linearity.

If it reaches the sensor before or after a predetermined time, it indicates nonlinearity and requires a correction sign.

Linearity may also be monitored vertically using the same technique. In either case, conventional circuitry can be used to correct the deflection voltage or current waveform.

If the raster has an interlaced display image, it may be desirable to modify the device of the invention to display the test pattern partially in each of two consecutive frames. For this,
The scan lines may be counted so that the appropriate line in successive frames triggers the pattern scanning device to recognize the appropriate portion of the pattern.

FIG. 7 shows another embodiment of the present invention. A raster 10 of a CRT monitor is shown schematically, with two sensors 72, 74
correspond to the top and bottom edges of the raster, respectively. When the sensors 72, 74 are activated by light from scan lines that coincide with the first and last scan lines of the raster, the raster has the correct height. The position of one scan line is verified when sensor 72 pulses during the first scan line and when sensor 74 pulses during the last scan line.

This coincidence can be easily detected by using a counter 80 that counts horizontal blanking pulses and is reset with each horizontal blanking pulse or, in the case of interlaced scanning, with alternating horizontal blanking pulses. . A logic unit 82 is connected to a counter 80 which generates a signal on output line 84.86 when the state of the counter 80 matches the first and last lines of the raster.

The output lines are each connected to one input of AND gate 88.90, and the other input of AND gate 88.90 receives a signal from sensor 72.74. Both gates 88
．． When 90 generates an output signal, the correct height of the raster is verified.

If a third sensor 16 is placed between sensors 72, 74, the output of this sensor 76 corresponds to the scan line at the position of sensor 76 when vertical linearity is correct. . By gating with the output of logic circuit 82 on line 85, the vertical consistency of the raster is verified.

The present invention can also be used to automatically compensate for changes in software and hardware combinations. For example, in some combinations, the video device has touch input capabilities and the computer program is designed to receive touch input. The computer program has an initialization program that is executed before using any touch input data. This initialization program displays a grid pattern on the video display screen and instructs the user to touch two or more points on the grid pattern. When the user complies with the instructions, an electrical signal is generated by the touch input system indicating the X and Y coordinates of the location on the video screen touched by the user. This electrical signal establishes the correlation of subsequent data to the physical parameters of the video display screen.

FIG. 8 shows a video screen 101 on which a grid pattern 103 having diagonally opposite points a and b is displayed. When a user touches a point on the video display screen that corresponds to point a, a digital signal is generated indicating the x and y position of point a.

Similarly, when a dot is touched by a user, different combinations of signals are generated indicating the physical coordinates of the dot on the display screen. Preferably, when the pattern shown in Figure 8 is displayed, the video display unit is in a graphics mode in which each of the many points separately displayed on the screen is independently addressable. It is.

For example, a commercially available IBM PC has a graphics mode that allows display from a bitmap memory of 200 columns of dots, each column containing 640 dots spaced along the length of the scan line. There is. In this case, use the pattern shown in Figure 8, with the upper left corner (dot position a)
It may be displayed in the 15th row of the column, and the lower right corner (dot position b) may be displayed in the 625th row of the 195th column. This ensures that the video display screen in use has enough overscan that the corners of the pattern are not visible on the screen.

When the pattern of FIG. 8 is displayed on the screen and the user touches position a on the screen, a digital signal is generated indicating the X and Y coordinates of this position. For example, assume that the actual position on the screen corresponds to column number 8 and row number 17, indicating a shift of 3 columns and 2 rows. Next time you touch me, that
Assume that the and y coordinates indicate the 194th column and the 624th row, which is shifted by one column and one row from the desired position. This data is later used by the operating program so that when a position input corresponding to column 8 and line 17 is received from a touch input on the video display screen, this position input corresponds to the program position corresponding to column 5, line 15. Correct it so that it can be identified as corresponding to . Corresponding adjustments are made over the entire area of the video display screen using the following relationship: In the formula, x and y indicate the current position input from the touch input device, Xo and Vo indicate the position input of point a, and x1 and yl indicate the position input of point a.

New X=(XXo)・(625-15>/(XI Xo)
)+15 New V=(V Vo)・(195-9)/N'1-yo)
+5 Figure 9 shows an initialization program that can obtain data used to correct display screen position. The program receives its input from the program step of the initialization program, which upon completion unit 112
is controlled to display the burn shown in FIG. Unit 114 is then controlled to cause touch input device 113 to obtain a digital input signal indicating the position of point a, after which unit 116 controls touch input device 113 to obtain a digital input signal indicating the position of point a. and parameters corresponding to Vo are stored. Units 118 and 120 then perform similar operations on inputs and parameters X and Vl, and then return to the normal initialization program. FIG. 10 shows a program that uses correlation data. Assuming an executable program that needs to receive data from a touch input device on a video screen, when the touch input device is activated, the interrupt unit 124 is controlled to memorize the location of the executable program, so that the current command of the executable program will be restarted at that position later. Interrupt unit 1
24 then goes to unit 126 which determines whether the display screen is in graphics mode and if so, unit 128 which determines whether the interrupt is one that requires touch input. If a touch input is required, the unit 130 is controlled to calculate and store new values of X and y based on the touch input data according to the above-mentioned formulas, thereby updating the program and the display screen actually used. Correcting discrepancies between

Unit 126. If 128 indicates that the video screen is not in graphics mode, or that touch input is not required, then the next step in the normal interrupt routine is immediately entered.

If not, unit 130 goes to the interrupt routine and then returns to the next step in the executing program, such as via a side-step return. As a result, an executable program that requires position data as a result of touch input can resolve the touch input data regardless of the characteristics of the individual video display units 1-.

[Brief explanation of drawings]

FIG. 1 is a front view of a video monitor displaying a test pattern at the edge between the image area and the grooved frame, with the photoelectric sensor omitted; FIG. FIGS. 3 and 4 are diagrams showing the spatial arrangement of test patterns, FIG. 5 is a functional diagram of the control system that controls the image position, and FIG. FIG. 7 is a diagram showing a test pattern, FIG. 7 is a diagram showing another embodiment of the present invention, and FIGS. 8 to 10 are diagrams showing still other embodiments of the present invention. 10... Video monitor 12... Video image 14
...Grooved frame 16...Edge 18...Test pattern 1; (Right Wing) To the Commissioner of the Japan Patent Office May 29, 1985 1. Case Indication Patent Application No. 1988-94 ``Hatake 2. Invention Name Dynamic Matching Method and Device 3. Relationship with the Amendment Person Case Patent Applicant Address 2800 Oakmont Center, Round Rock, Texas 78664, United States of America Name
Carol Touch Technology Incorporated 4, Agent 7th Floor, Uraiya Building, 5-2-1 Roppongi, Minato-ku, Tokyo (7318) Patent Attorney Yanagi 1) Masashi (and 1 other person) 5.
Date of amendment order: April 10, 1985 (Shipping date: April 30, 1985)
8) Contents of amendment 1) Amend the application form as attached. 2) Supplement the power of attorney. 3) Correct the drawing to an inked drawing. 9. Attached documents 1) Application for correction, original and copy, 1 copy each 2) Power of attorney and its translation, 1 copy each 3) Drawings, 1 copy

Claims (4)

[Claims] (1) means for generating a test pattern in a fixed relationship to a visual image; and means mounted at a fixed position relative to the screen of a video monitor and responsive to the test pattern to determine the position of the test pattern relative to a predetermined fixed position. a photoresponsive device for generating a signal indicating the test pattern; and means for changing the position of the test pattern on the screen in response to the signal.
A device that controls the position of the visual image on the screen of a video monitor. (2) displaying a test pattern on the screen of a video monitor in a fixed relationship to an image area, inspecting the position of the test pattern with respect to a fixed position on the screen of the monitor, and determining the position of the test pattern and the image area; A method for maintaining an image area of a video monitor at a predetermined fixed position, comprising the steps of adjusting the test pattern together to match the predetermined fixed position. (3) means for generating a test pattern in fixed relation to the visual image; touch input means for generating a signal indicative of the position of the video monitor when the surface of the video monitor is touched; means for correlating particular points of a test pattern, so that correlation data can be used to compensate for changes in position of the test pattern due to physical characteristics of the video monitor; A device that correlates the position of visual images on the screen of a monitor. (4) generating a test pattern in a fixed relationship with the visual image, correcting data indicating a particular position of said test pattern, storing said data, and obtaining later positional data through the touch input function of the video monitor; referencing the stored data each time the test pattern is displayed and using the stored data to correct for changes in the position of the test pattern due to physical characteristics of the video monitor.
A method for correlating the position of a visual image on the screen of a video monitor with touch input capabilities.