JPH0876929A - Cursor display device - Google Patents

Abstract

PURPOSE: To obtain a device for displaying the depth direction and rotation around the vertical axis of a screen on the screen in addition to the vertical and horizontal direction of the screen by an input device (light receiving part) corresponding to a CRT display device. CONSTITUTION: The light receiving part 11 includes a lens 1, a mirror 2 and a light detecting element 3, light emission from the fluorescent surface of a CRT 8 is detected from two routes, i.e., direct light from the lens 1 and reflected light from the mirror 1, a distance between the light receiving part 11 and the fluorescent surface of the CRT 8 and/or a vertical and horizontal position indicating the angle of the light receiving part 11 from the fluorescent surface are found out by a computing element 5, and a cursor is displayed on a CRT 8 through a display synthesizer 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for displaying a cursor on a video image display device such as a television, and more particularly to a cursor display device that can be used for a controller using a display, a game and the like.

[0002]

2. Description of the Related Art FIG. 20 is a diagram showing a conventional light pen input device. This is the phosphor screen 1 of the CRT display device 111.
The optical sensor 11 which has the timing of the light emission of 12 close to the screen
3 is a device for reading the position of the inputted light from the timing of screen light emission and the timing of screen scanning (reference signal) and displaying the point at that position.

[0003]

In this conventional device,
A two-dimensional image displayed on the screen can be displayed in points, but a stereoscopic screen display device or the like using parallax 3
The CRT display device that displays dimensions has a problem in that it cannot display points in the depth direction and cannot display additional information even in the case of two-dimensional display.

The present invention has been made to solve the above problems, and a first object of the present invention is to obtain an inexpensive device capable of moving a cursor not only in the vertical and horizontal directions but also in the depth direction. That is. The second object of the present invention is to
An object is to obtain an inexpensive device capable of moving the cursor in the vertical and horizontal directions and detecting and displaying the angle of the light receiving portion. A third object of the present invention is to obtain an inexpensive device that can move the cursor in the vertical direction, the horizontal direction, and the depth direction and that displays the angle of the light receiving unit.

[0005]

In a cursor display device according to the present invention, the CRT display means, a light receiving means for detecting the light emission of the fluorescent screen of the display means, and the timing of light emission from the light receiving signal by the light receiving means are set as described above. The CRT display device is provided with a computing means for computing with reference to the vertical and horizontal synchronizing signals and a display synthesizing means for displaying the position of the light receiving means on the CRT display device with a cursor based on the output of the computing means. Is to detect the light emission of the fluorescent screen by two paths, and to measure the vertical and horizontal positions indicating either or both of the distance from the fluorescent screen of the light receiving means and the angle with respect to the fluorescent screen.

Further, the light receiving means is composed of a lens, a mirror and a light detecting element, and detects the light emission of the CRT phosphor screen from two paths of the direct light from the lens and the reflected light from the mirror, and the light receiving means The vertical and horizontal positions indicating one or both of the distance from the fluorescent screen and the angle with respect to the fluorescent screen are measured.

Further, the light receiving means is composed of two lenses having different optical axes and a photo-detecting element. The light emission of the fluorescent surface is detected from two paths by each lens, and the light from the fluorescent surface of the light receiving means is detected. The vertical and horizontal positions indicating one or both of the distance and the angle with respect to the phosphor screen are measured.

Further, the light receiving means is composed of one lens and two light detecting elements, and the light emission of the fluorescent surface is detected by the two light detecting elements from two paths, and the fluorescent surface of the light receiving means is detected. The left and right positions indicating either one or both of the distance from and the angle with respect to the phosphor screen are measured.

[0009]

The cursor display device according to the present invention is a CRT.
The light from the display screen is received by the light receiving means in two paths, the time difference of the light reception is measured, and this is converted into the distance and / or the angle between the CRT screen and the light receiving means with reference to the vertical and horizontal synchronizing signals in the calculating means. Then, this is displayed as a cursor on the CRT screen through the display synthesizing means. The position of the cursor can be moved not only in the vertical and horizontal directions but also in the depth direction, and the rotation angle of the light receiving means can also be displayed. To

[0010]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 shows a cursor display device according to a first embodiment of the present invention. In the figure, 11 is a light receiving part, which is C
The lens 1 on which light from the RT display screen is incident, and the lens 1
It is composed of a mirror 2 which reflects the light from and a light receiving element 3 which detects the light and converts it into an electric signal. 4 is an amplifier for amplifying the signal from the light receiving element 3, 5 is a calculator for calculating the position from the signal passed through the amplifier 4, 6 is a display combiner for combining the display with the information from the calculator 5, and 7 is an image Signal, 8 is a CRT for displaying an image, 9 is a detection signal, 10 is a sync separation circuit, 1
2 is a separated sync signal.

First, the principle of this apparatus will be described. Figure 2
(A) is a figure for demonstrating the principle of the apparatus of Claim 2,
The configuration shows the light receiving portion 11 and the CRT 8 portion in FIG. When the CRT 8 surface is at the position a, of the light rays from the CRT 8 surface, the light condensed by the lens 1 and directly reaching the light receiving element 3 is the light from the position A. On the other hand, since the mirror 2 is attached behind the lens 1, the light from the position B also reaches the light receiving element 3 as reflected light. On the other hand, when the surface of the CRT 8 is at the position b, the light from C and D similarly enters the light receiving element, and the light from the position lb away reaches the light receiving element 3.

FIG. 2B is a diagram for explaining the principle of the apparatus according to claim 3, and the constitution is the light receiving portion 11 and the CRT 8 of FIG.
The part is shown. When the CRT8 surface is at position a, C
Of the light rays from the surface of RT8, the light that is condensed by the first lens 1 and reaches the light receiving element 3 is the light from the position A. The light condensed by the other second lens 1 ′ and reaching the light receiving element 3 is the light from the position B. On the other hand, when the surface of the CRT 8 is at the position b, the light from C and D similarly enters the light receiving element, and the light from the position lb away reaches the light receiving element 3.

FIG. 2 (c) is a view for explaining the principle of the apparatus of claim 4, and the constitution is the light receiving portion 11 and the CRT 8 of FIG.
The part is shown. When the CRT8 surface is at position a, C
Of the light rays from the RT8 surface, the light that is condensed by the lens 1 and reaches the first light receiving element 3 is the light from the position A. On the other hand, the light condensed by the lens 1 and reaching the other second light receiving element 3'is the light from the position B. That is, when the surface of the CRT 8 is a, the light from the position B, which is separated from A by la, reaches the light receiving element 3 ′. On the other hand, when the surface of the CRT 8 is at the position b, the light from C and D similarly enters the light receiving element, and the light from the position lb away reaches the light receiving element 3 '.

FIG. 3 is a diagram showing a general CRT image output system. The entire surface of the CRT does not always emit light, but scans and emits light in the direction of the arrow in the figure, so that the visual afterimage effect forms a single visual image.

FIG. 4 is an oblique view of FIG. When the light source has a difference in position of la and lb, when this is received by the light receiving unit, a time difference corresponding to the scanning time occurs. That is, since la has a longer distance on the screen than lb, the scanning time interval becomes longer than lb. Therefore, the time difference between the two lights entering the light receiving element becomes long. That is, the information on the distance from the CRT is converted into the time interval. The principle of the light receiving unit of this device is to measure this time interval and measure the distance from the CRT to the light receiving unit.

Next, the flow of signals will be described with reference to FIG. The light incident from the point A of the CRT 8 is imaged on the light receiving element 3 by the lens 1. The positional relationship between the lens 1 and the light receiving element 3 is arranged at a position where the image of the CRT 8 is substantially formed on the light receiving element 3. That is, the light receiving element 3 is placed near the focal length of the lens 1. However, this position does not have to be set precisely. On the other hand, the light incident from the point B of the CRT 8 passes through the lens 1, is reflected by the mirror 2, and then forms an image on the light receiving element 3. The light receiving element 3 is for converting a light signal into an electric signal and uses a photodiode or the like. Amplifier 4
Amplifies the signal converted into an electric signal, for example, a voltage value that can be detected by a microcomputer or the like.

FIG. 5 is a diagram showing the timing of signals at this time. Here, assuming that a sync signal such as an NTSC signal and a video signal are superimposed, the sync separation circuit 1
Although the signal is from 0, there is no essential difference even if the synchronizing signal is divided from the beginning. VD is a vertical synchronizing signal that serves as a reference for vertical scanning, and corresponds to the upper portion of the screen in FIG. HD is a horizontal synchronizing signal that serves as a reference for horizontal scanning, and corresponds to the left end of the solid line arrow in FIG. FIG. 5B is an enlarged view of portions A, B and C in FIG. 5A, where A is near the vertical synchronizing signal and A is near the signal detected by the light receiving element 3 after being reflected from the mirror 2. , C indicates the vicinity of a signal obtained by detecting light directly from the lens 1 by the light receiving element 3. The arithmetic circuit 5 is usually composed of a microcomputer or the like.

FIG. 6 shows in detail the portions (a) and (c) of FIG. t0, t1, ... Show the widths of the detection signals. The time from VD may be measured as the position of the reflected light (portion A) and the direct light (portion C) in the vertical direction of the screen. The timing tv in the vertical direction is obtained by the following calculation, for example.

[0019]

[Equation 1]

[0020]

[Equation 2]

The horizontal timing tH may be obtained by measuring the time from HD. For example, tw2 in FIG. 7 is adopted and tH = tw2.

Next, an example in which the arithmetic circuit 5 is actually composed of a microcomputer will be shown. FIG. 8 shows the internal configuration of the arithmetic circuit 5. The detection signal 9 is a flip-flop 81.
Through microcomputer (hereinafter referred to as microcomputer)
It is input to B of 87. This is for holding the pulse of the detection signal and storing whether or not there is an input. The time from the HD pulse to the detection signal is the counter 8
Counted by 3. The count clock is supplied by the oscillator 88. The frequency of the oscillator 88 is selected to be sufficiently higher than the HD frequency, for example, HD is 1
In case of 5 KHz, it is set to several MHz. The count of the counter 83 is reset (becomes 0) by the HD pulse, and at the rising edge of the detection signal 9, the flip-flop 85
And is stored in the flip-flop 86 at the falling edge of the detection signal 9.

The flip-flop 82 is provided so that the flip-flops 85 and 86 do not store a halfway value when the value of the counter 83 is changing. The count value stored in the flip-flops 85 and 86 is input to the microcomputer 87. Counter 84 is VD
The number of HDs from is counted, and the counted number is also input to the microcomputer 87. HD and VD signals are also input to the microcomputer 87, and HD is input to the interrupt terminal so as to obtain accurate timing.

The internal processing of the arithmetic circuit 5 will be described with reference to the flowcharts of FIGS. 9 to 12 with reference to FIG. First HD
The interrupt process is activated at the rising edge of the HD pulse (S1 (1)). It is checked whether there is a detection signal according to the signal input to B of the microcomputer 87 (S1
(2)), if there is a pulse of the detection signal (since it is stored in the flip-flop 81, the B input is H)
The flip-flop 81 is reset to erase the new memory contents (S1 (3)). If there is a detection signal pulse, it is determined whether it is direct light or indirect light (S1 (4)). Looking at the direct light flag di (described later), in the case of direct light, the H input that is the value of the falling time count value storage flip-flop 85 of the detection signal is stored in the memory memo1 (i) (i is another counter, memo1 (0 ), Memo1 (1) ... is stored in the memory for storing the fall time) (S1
(5)).

Next, the G input which is the value of the rising time count value storage flip-flop 86 of the detection signal is stored in the memory m.
emo2 (i) (memo2 (0), memo2
(1). ． ． Is stored in the memory for storing the rising time) (S1 (6)). Further, the E input which is the value of the rising time count value storage flip-flop of the detection signal is stored in the memories memo3 (i) (memo3 (0), memo
3 (1). ． ． Is stored in a memory for storing the HD number (what line) from VD. In addition, i is also increased by 1 (i is a counter that counts the execution of steps S1 (5) to S1 (7) in the case of direct light) (S1
(7)).

When it is determined in S1 (4) that the light is not direct light, the H input is set to memo4 (j) (j is another counter, m
emo4 (0), memo4 (1). ． ． Is stored in the memory for storing H input) (S1 (10)). Next, input G input to memo5 (j) (memo5 (0), memo5
(1). ． ． Is stored in the memory for storing G input) (S1 (11)). Furthermore, E input is memo6 (j)
(Memo6 (0), memo6 (1) ... Is a memory for storing the E input) (S1 (12)). S1
If there is no pulse of the detection signal in (2) (B is L), the process proceeds to S1 (8), and memo6 (j-1), which is a value obtained by adding 3 to the previously stored count value of the HD number from VD. +
3 (however, the last HD count for which there was a pulse that is not direct light is memo6 (j-1)) and the current HD number count E input are compared (S1 (8)), and if E is larger, di (0 when not direct light, 1 when direct light) is set to 1 (S1 (9)).

In FIG. 10, when the microcomputer 87 starts operating, initial processing is started (S2 (1)), and the counter i,
The counters j and di are initialized (S2 (2)). FIG.
1 and FIG. 12 show loop processing. First, it waits for the VD pulse to become "L" (S2 (3)), and when it becomes "L", it is prohibited to start the HD interrupt processing (S2).
(4)). Next, see if i is 0, and if i is 0, S2
The process proceeds to (6) (the counter i is not 0 when a direct light pulse is detected), and if it is 0, the process proceeds to S2 (22) (S2).
2 (5)). Also, if j is 0 and it is not 0, S
2 (7), and if 0, proceed to S2 (22) (S2
(6)). In S2 (7), the counter k for addition, the addition general-purpose memory TVR, and the addition general-purpose memory TVM are initialized (S2 (7)).

In the following, the calculation of Σ in equation 1 is performed in the loop of S2 (8) to S2 (11). That is, in TVR (memo2
(K) -memo1 (k)) × memo3 (k) is added (S2 (8)). memo2 (k) -memo1
(K) represents the time width of the pulse, and corresponds to t1 in Expression 1. memo3 (k) indicates the number of HDs from VD. Next, in the TVM, memo2 (k) -memo1
(K) is added (S2 (9)). 1 is added to k (S2
(10)), it is checked whether k matches i, and if they match, the loop is ended and the process proceeds to S2 (12). If they do not match, the loop is repeated (S2 (11)). Calculation result, TV
R and TVM are as follows.

[0029]

(Equation 3)

[0030]

[Equation 4]

Divide TVR by TVM and place the result in TVR. This value TVRR is a value obtained by weighting and averaging the number of HDs from VD over the time of the pulse width, and is represented by the following formula.

[0032]

(Equation 5)

The memo1 (2) (third pulse falling time) is substituted for TH1 (S2 (13)). Since the processing up to this point is not direct light, it is lateral to TH1, TVR
This means that the vertical position (time unit, HD number unit) is substituted for R. Next, in steps S2 (14) to S2 (20), arithmetic processing such as addition to direct light is similarly performed. Since this step is the same as S2 (7) to S2 (13), description thereof will be omitted. However, memo1 (k) is m
memo4 (k), memo2 (k) is memo5
(K), TVRR is TVRD, TH1 is TH2, TVRD is the weighted average of the HD number from VD to the pulse width time, and the direct light position is substituted into TH2 and TVRD. It will be.

Next, TVRR-TVRD is substituted into DTVR (S2 (21)). A vertical difference (HD number unit) between direct light and indirect light is substituted into DTVR. S2 (22)
Then, the display control output processing is performed by DTVR, TVRD, TH2, etc., but the details are omitted. Further, the counter i, the counter j, and the di are initialized to 0 (S2 (23)), the interrupt activation of the HD is enabled (S2 (24)), and the process returns to S2 (3) after waiting for HD to become H ( S2 (25)). S
2 (6) When j = 0 or i = 0 (when two pulse trains cannot be measured), the process proceeds to S2 (22). Here, TVRD: direct light detection time, TVRR: reflected light detection time, DTVR = TVRR-TVRD: vertical time difference (distance) between direct light and reflected light TVR: cumulative time of variable loop time × weighted value TVM: After the variable loop: Cumulative weighting value TVR / TVM: Weighted average value.

The above operation is summarized as follows.
In the HD interrupt processing, it is checked whether or not there is a detection signal by the signal input to the microcomputer, and if there is an input, the time measurement results shown in FIGS. 6 and 7 are stored. If there is no input, it will not be remembered. Also, it is determined whether the detected signal is direct light or indirect light. If there was no detection signal for three consecutive times, there was a gap (indirect light ended, then direct light)
Therefore, the di flag is set and the storage location is changed. In the initialization process, the index used in the HD interrupt process is initialized. This index is Equation 1,
This corresponds to i in Expression 2. The main routine waits for VD to fall and then executes the calculations corresponding to Expressions 1 and 2. The position information of the detection signal obtained as a result of this calculation is used for displaying the cursor. The display control output process will be described later. After initializing the index, wait for VD to rise and return to the beginning of the main routine.

Next, display control will be described. FIG.
3 describes a mechanism for displaying a stereoscopic image by using the parallax of both eyes. The right eye image and the left eye image are switched and displayed on the same screen, and the right eye image is only the right eye.
The device is configured by attaching a shutter in front of the eye so that the image of the left eye can be seen only by the left eye. The actual device configuration will not be described in detail here. Right eye position y = 0, x = X
R, the position of the left eye y = 0, x = XL, and the image position is x
When it is attempted to display at positions 0 and y0, and there is a distance of Ys from the eye position to the CRT screen, the images on the right and left eye screens may be located at the following formulas.

[0037]

(Equation 6)

[0038]

(Equation 7)

For example, a case of displaying a cursor according to the timing of the detected optical signal will be described. The detected time difference DTVR is converted into y0. For example, y0 = k0 · D
It is regarded as TVR (k is a positive number) and converted into the position of the image on the screen by the above arithmetic expression. TH2 is adopted as x0. TVRD is used for the vertical position. The display synthesis circuit 6 outputs the display control output so that the cursor is displayed at this position. A character generator IC or the like is used as the display synthesizing circuit, but details thereof will not be described.

Example 2. The second embodiment is a CRT of the light receiving unit.
An example is shown in which the rotation angle with respect to the vertical axis of the screen is displayed by a cursor. The configuration is the same as that of the first embodiment, but there is a difference in the arithmetic processing part. If the light receiving elements 3 and 3'are rotated in the directions of the arrows in FIG. 2, light from A and C similarly enters the light receiving elements 3 and 3 '.

Therefore, the time relationship between the two lights entering the light receiving elements 3 and 3'changes. That is, the rotation information of the light receiving element is converted into time. The principle of the light receiving section is to measure this time to measure the rotation of the light receiving element.

FIG. 15 is a flowchart showing the internal processing of the microcomputer.
18 to 18, this is almost the same as that of FIGS. 9 to 12, and the differences are S2 (21) and S2 (22).
There is only S2 (26) between and. DTH
Indicates the difference in the lateral position between direct light and indirect light.

Next, display control will be described. For example, a case where a cursor is displayed according to the timing of the detected optical signal will be described. The detected time difference DTVR is y
Convert to d. For example, yd = ky · DTVR (ky is a positive number). Similarly, the detected time difference DTH is xd
Convert to. For example, xd = kx · DTVR (kx is the number of sexes). The rotation angle θ of the light receiving element is expressed by the following equation.

[0044]

[Equation 8]

The rotation angle of the light receiving element is converted into the shape of the cursor on the screen by the above arithmetic expression. FIG. 19 shows an example of the shape of the cursor. In this example, if θ is between 0 and 15 degrees, it is a, if it is between 15 and 45 degrees, it is b, 4
C is displayed between 5 degrees and 75 degrees, and d is displayed between 75 degrees and 105 degrees. T is the horizontal display position
Adopt H2. TVRD is used for the vertical position.
The display synthesis circuit 6 outputs the display control output so that the cursor is displayed at this position. A character generator IC or the like is used as the display synthesis circuit.

[0046]

As described above, according to the present invention, it is possible to obtain a highly flexible cursor display device capable of moving the cursor not only in the horizontal and vertical directions of the screen, but also in the depth direction. Not only the display but also the three-dimensional display can be accurately pointed.

Further, it is possible to obtain a more flexible cursor display device capable of displaying the rotation angle in addition to the horizontal and vertical directions of the conventional screen.

[Brief description of drawings]

FIG. 1 is a block diagram showing a cursor display device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a main part of an embodiment of the present invention.

FIG. 3 is a diagram illustrating scanning of a CRT.

FIG. 4 is a diagram illustrating the principle of an embodiment of the present invention.

FIG. 5 is a diagram showing timings of a video signal and a detection signal.

FIG. 6 is a diagram showing in detail the timing of a detection signal.

FIG. 7 is a diagram showing in detail the timing of a detection signal.

FIG. 8 is a circuit diagram showing a circuit configuration of an arithmetic unit used in the present invention.

FIG. 9 is a flowchart showing the operation of the microcomputer of the arithmetic unit in one embodiment of the present invention.

FIG. 10 is a flowchart showing the operation of the microcomputer of the arithmetic unit in one embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the microcomputer of the arithmetic unit in one embodiment of the present invention.

FIG. 12 is a flowchart showing the operation of the microcomputer of the arithmetic unit in one embodiment of the present invention.

[Fig. 13] Fig. 13 is a diagram illustrating the principle of three-dimensional display using parallax.

FIG. 14 is a diagram illustrating the principle of another embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the microcomputer of the arithmetic unit in another embodiment of the present invention.

FIG. 16 is a flowchart showing the operation of the microcomputer of the arithmetic unit in another embodiment of the present invention.

FIG. 17 is a flowchart showing the operation of the microcomputer of the arithmetic unit in another embodiment of the present invention.

FIG. 18 is a flowchart showing the operation of the microcomputer of the arithmetic unit in another embodiment of the present invention.

FIG. 19 is a diagram showing a cursor shape according to another embodiment of the present invention.

FIG. 20 is a perspective view showing a conventional cursor display device.

[Explanation of symbols]

1 lens, 2 mirror, 3 light receiving element, 4 amplifier, 5
Operation unit, 6 display synthesizer, 8 CRT, 10 sync separation circuit, 11 light receiving unit.

Claims (4)

[Claims] 1. A CRT display means, a light receiving means for detecting light emission of a phosphor screen of the display means, and a timing of the light emission based on a light receiving signal from the light receiving means with reference to vertical and horizontal synchronizing signals of the CRT display device. Computation means for computing and display combining means for displaying the position of the light receiving means on the CRT display device by a cursor based on the output of the computing means are provided, and the light receiving means comprises two different light emission of the fluorescent screen. A cursor display device, characterized in that a vertical and horizontal position indicating one or both of a distance from the fluorescent screen of the light receiving means and an angle with respect to the fluorescent screen is measured by a path. 2. The light receiving means is composed of a lens, a mirror and a light detecting element, and detects the light emission of the CRT phosphor screen from two paths of the direct light from the lens and the reflected light from the mirror,
2. The cursor display device according to claim 1, wherein the vertical and horizontal positions indicating either one or both of the distance from the fluorescent screen and the angle with respect to the fluorescent screen of the light receiving unit are measured. 3. The light receiving means is composed of two lenses having different optical axes and a light detecting element, and the light emission of the CRT phosphor screen is detected from two paths by the respective lenses, and the light receiving means is provided with 2. The cursor display device according to claim 1, wherein the vertical and horizontal positions indicating one or both of the distance from the fluorescent screen and the angle with respect to the fluorescent screen are measured. 4. The light receiving means is composed of one lens and two light detecting elements, and the light emission of the CRT phosphor screen is detected by the two light detecting elements from two paths, and the light receiving means 2. The cursor display device according to claim 1, wherein an upper, lower, left, and right positions indicating one or both of a distance from the fluorescent screen and an angle with respect to the fluorescent screen are measured.