Shooting game system and external storage used therefor

Abstract: A video game set (1) displays a sighting mark on a television receiver (4). A player shoots this sighting mark by a shooting scope (5). At this time, the shift between a coordinate position of the sighting mark and a coordinate position which is shot is operated by the video game set (1) and is stored as a correction value. When the player shoots a target in a game mode, the coordinate position which is shot is corrected on the basis of the correction value stored in the video game set (1).

Description: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a shooting game system. More particularly, it relates to shooting game system so adapted as to display a target on a raster scan type display and shoot the target displayed with a shooting scope and an external storage used therefor. Description of the Prior Art As a shooting game system so adapted as to shoot a target displayed on a television receiver with a shooting scope, a shooting game system disclosed in U.S. Patent No. 4,395,045 (hereinafter referred to as first prior art), a shooting game system disclosed in Japanese Patent Laid-Open Gazette No. 171063/1985 (corresponding U.S. Patent No. 4,813,682) (hereinafter referred to as second prior art), a weapon aim-training apparatus disclosed in U.K. Patent Application No. GB-A-2160298 (hereinafter referred to as third prior art), and a target video game avoiding erroneous counts disclosed in U.S. Patent No. 4,205,847 (hereinafter referred to as fourth prior art), have been conventionally known. In the above described first prior art, an image of a target displayed on a television receiver is detected on the side of a shooting scope, and its detection pulse is transmitted to a computer connected to the television receiver. The computer detects a coordinate position which is shot on the screen of the television receiver on the basis of the phase differences between the detection pulse received and synchronizing signals (horizontal and vertical synchronizing signals) of the television receiver. The above described second prior art is so adapted as to display a character of a target in white and a background in black when a trigger switch of a shooting scope is depressed, and make hit judgment depending on whether or not an image of this character is detected by the shooting scope. In the above described third prior art, optical aim-training apparatus for a rifle comprises a CRT displaying a target image on a scanned line raster. A photo-detection means is attached on the gun so that a sight-line axis and a detection axis are parallel to each other, and a known discrepancy or error on the screen based on the sight-line axis and the detection axis is detected according to a predetermined calibration procedure. Subsequently, when the user pulls the trigger of the gun aiming at the target image displayed on the screen, the marker region of the raster at a position spaced apart from the image by the discrepancy determined by the calibration procedure is temporarily brightened. The optical pulse string by the raster scanning of the brightened marker region is detected and the position of the sight center of the detector on the screen, i.e., an actual aim point, is found. The actual aim point is found without brightening the entire screen. In the above described fourth prior art, a target video game employs a screen with a moving light spot symbol and a target detector. A frequency selective circuit is provided for selecting the electrical signals generated by the light entering a photosensor in the target detector according to their frequency relationship with respect to line scanning and frame scanning frequency. The first prior art is so adapted as to correct the coordinate position which is shot by the shooting scope on the screen of the television receiver when hit judgment is made. The reason for this is that an optical axis of the barrel of the shooting scope and a sighting axis of a gunsight do not exist on the same straight line, so that there occurs a shift between the optical axis and the sighting axis on the screen of the television receiver. However, this correction processing is performed using a fixed correction value. Therefore, the first prior art has the disadvantage in that no ideal correction can be made and inaccurate hit judgment is made in cases, for example, where an angle at which a player looks into the gunsight deviates from a previously presumed angle or an angle which the optical axis of the barrel forms with the sighting axis of the gunsight deviates from a previously presumed angle due to a manufacturing error, and the distance between the television receiver and the shooting scope deviates from a previously presumed distance. Furthermore, the first prior art also has the disadvantage in that an optical system provided for the shooting scope and an optical system provided for the computer are easily adversely affected by disturbance light from the exterior (for example, one due to illuminating light of a fluorescent lamp or the like and one due to substantial adjustment of the luminance of the television receiver), and an error is liable to occur in detection of a light receiving signal from the target of the television receiver. On the other hand, the second prior art has the disadvantage in that the precision of hit judgment is low when a small target is shot because a coordinate position which is shot by the shooting scope can be only detected for each character. Furthermore, the second prior art has the disadvantage in that no accurate hit judgment can be made when an optical axis of the barrel of the shooting scope and a sighting axis of a gunsight are shifted because the coordinate position which is shot is not corrected. It is an object of the third prior art to provide a shooting training apparatus utilizing light which is more accurate and has fewer disadvantages compared to known methods for bullet shooting type weapons. On the contrary, it is an object of the present invention to provide a shooting game system capable of detecting small targets such as a dot unit with high accuracy. Furthermore, it is also an object of the present invention to correct errors which become larger as the distance from the position of the shooting scope to the display becomes shorter or larger than a predetermined distance when the distance is not the predetermined one, and errors caused by the different ways of individual users, variations of the products and the like. Such objects of the present invention are not disclosed nor suggested in the third prior art. The error described in the third prior art is an error based on the interval between the detection axis and the sight-line axis existing because the detection axis and the sight-line axis are parallel to each other. This interval has a constant value (i.e., the known difference). The known difference does not depend on the distance between the gun and the screen of the display, but is always maintained at a certain value. On the contrary, the error in the present invention is not constant like the above-described error. That is to say, in the present invention, the sight is attached at a predetermined inclination angle with respect to the shooting scope so that the light receiving axis of the shooting scope and the sighting axis of the sight intersect on the screen of the display, in other words, the sighting axis has a predetermined angle with respect to the light receiving axis, when the distance between the shooting scope and the display is a predetermined distance. Accordingly, the error (discrepancy) between the light receiving axis and the sight on the screen becomes larger as the distance between the shooting scope and the display becomes shorter or longer than the predetermined distance. The error also changes depending on different ways of the players, variations of the products and the like. As described above, the error described in the present invention has an entirely different meaning from the error in the third prior art. In the third prior art, when a user pulls a trigger, the marker region is brightened, and the coordinate position of the detection point is detected when the detection point overlaps with the marker region. Accordingly, the coordinates of the detection point can not be detected if the detection point does not overlap with the marker region, so that the coordinate position of the aim point can not be detected. That is to say, it can not be known how far the shot position on the screen is spaced apart from the target image. On the contrary, in the present invention, light of the image displayed on the screen when a trigger signal is generated is detected, and the coordinate position at which the image is displayed is detected, so that coordinate positions can be detected in the entire part of the image displayed on the screen. Therefore, it can be known how far the shot position on the screen is apart from the target. As described above, the operation principle of the present invention is technically quite different from that in the third prior art. The sighting means in the third prior art is provided at a position spaced apart by a predetermined distance from the photo-detection means so that the sight-line axis and the detection axis are parallel, and provided integrally to the gun. Accordingly, the sighting means is set so that the aim is always set above the detection point on the screen. In this way, the sight-line axis at the third prior art corresponding to the sighting axis of the present application and the detection axis of the third prior art corresponding to the light receiving axis of the present application are parallel and do not cross. On the contrary, the sight of the present invention is set so that the sighting axis intersects the light receiving axis when the distance between the shooting scope and the display is a predetermined distance. Accordingly, if an attempt is made to take aim when the distance between the shooting scope and the display is not the predetermined distance, it is difficult to hit the target because of the error between the sighting axis and the light receiving axis. In the present invention, by correcting such an error, the detection accuracy is improved to improve the accuracy in hit judgment. Accordingly, the sighting means of the third prior art and the sight of the present invention are entirely different from each other not only in the structures of its provision, but also in the causes of occurrence of errors accompanying therewith, therefore, there are differences as described below in the principles for correcting the errors. The photo-detection means in the third prior art detects light in the marker region which is brightened white on the screen when the trigger is pulled and sends the information to the processing means. On the contrary, a photoelectric converting means and a control signal transmitting means in the present invention do not convert and transmit the light on the screen brightened by generation of a trigger signal, but convert the light of the image on the display into an electrical signal in response to the generation of the trigger signal and transmit a control signal based on the electrical signal to a game processing device. That is, the timings for detecting and transmitting the light on the screen are completely different in the photo-detection means in the third prior art and the photoelectric converting means and the control signal transmitting means of the present invention. Further, while the light received by the photo-detection means in the third prior art is the light brightened white in the marker region on the screen, the light received by the photoelectric converting means of the present invention is the light of the image on the display. The photo-detection means in the third prior art and the photo-electric converting means of the present invention receive completely different kinds of lights. The third prior art apparently does not disclose a constituent element corresponding to a reference mark display control means of the present invention. The processing means of the third prior art detects the known discrepancy, i.e., the difference in the positions of provision of the sighting means and the light receiving means by detecting the distance between the aim point and the detection point. On the contrary, error operating means in the present invention does not detect the difference of positions of provisions of the sight and the photoelectric converting means, but detects an error of angle between the sighting axis and the light receiving axis which depends on the design accuracy of the product and an error in use which depends on the distance between the shooting scope and the display. That is to say, the subjects of operations by the processing means in the third prior art and error operating means in the present invention are completely different. It is an effect of the third prior art that the entire screen is not brightened but that the marker region is brightened in a position spaced apart from the target image, so that the target image is not hidden because of the light in the marker region. It is also its effect that, since some raster lines are included in the field of sight of the detection means, the center position of the field of sight corresponding to a position aimed by a rifle can be precisely known from the relation of the number of generation of the raster generation signal and the detection pulse. However, the display position of the target image is limited to a position above the marker region, i.e., in the upper part of the screen since the sight-line axis is located above the detection axis. As a result, the image representation is considerably limited. On the contrary, an effect of the present invention is that precise correction can always be made because the error between the reference mark displayed on the television screen before starting the game and a coordinate position shot with the gun toy is operated in advance as a correction value and the shot coordinate positions are corrected on the basis of the correction vale during the game. As a result, precise sighting and determination of hits can always be accomplished regardless of the distance between the television receiver and the gun toy, different ways of individual players, variations of products and the like. Furthermore, in the present invention, the coordinate position is detected by detecting light of an image displayed on the display. Accordingly, a photo-detectable area can be set in the entire screen to enable more variety of image representation. The fourth prior art only discloses the technique for detecting points displayed on the TV screen and transmitting the detected information to the television device by radio, and does not disclose at all the constituent elements corresponding to the reference mark display controlling means, the error operating means, the error storing means and the correcting means which are important constituent elements of the present invention. Accordingly, it can not correct the error to always make precise hit determination which is the effect of the present application. Furthermore, while the optical points displayed on the television screen are detected in the fourth prior art, the light of the image displayed on the display is detected to detect the coordinate position in the present invention. Therefore, more variety of image representation can be realized which can not be obtained only by detecting the optical points. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a shooting game system capable of detecting even a small target such as a dot unit with high precision. Another object of the present invention is to provide a shooting game system which is not easily adversely affected by disturbance light from the exterior and always allows high-precision detection. Still another object of the present invention is to provide a new external storage used for a shooting game system. The present invention provides a shooting game system for shooting a target displayed on a raster scan type display in a position spaced apart from the display to play a shooting game, which comprises a game processing apparatus used with it being connected to the display for performing processing for the shooting game, and a shooting scope used in a position spaced apart from the display and for shooting the target displayed on the display. The shooting scope comprises trigger signal generating means, photoelectric converting means, and control signal transmitting means. The trigger signal generating means generates a trigger signal in response to an operation performed by a player. The photoelectric converting means converts light from a position which is shot on the display into an electric signal which is synchronized with raster scanning of the display. The control signal transmitting means transmits a control signal based on the electric signal outputted from the photoelectric converting means to the game processing apparatus in response to the trigger signal from the trigger signal generating means. The game processing apparatus comprises control signal receiving means, shot coordinate position detecting means, reference mark display controlling means, error operating means, error storing means, target display controlling means, correcting means, and hit judging means. The control signal- receiving means receives the control signal transmitted from the control signal transmitting means. The shot coordinate position detecting means detects a coordinate position which is shot by the shooting scope on the display on the basis of the control signal received by the control signal receiving means. The reference mark display controlling means displays a reference mark in a predetermined fixed position on the display before starting the game. The error operating means operates, when the reference mark is shot by the shooting scope, an error between the coordinate position detected by the shot coordinate position detecting means and a coordinate position of the reference mark. The error storing means stores the error operated by the error operating means. The target display controlling means displays the target on the display while the game is played. The correcting means corrects, when the target on the display is shot by the shooting scope, the relative positional relationship between a coordinate position of the target and the coordinate position detected by the shot coordinate position detecting means on the basis of the error stored in the error storing means. The hit judging means makes hit judgment in a case where the target is shot by the shooting scope on the basis of the relative positional relationship after being corrected by the correcting means. According to the present invention, there is provided a shooting game system for shooting a target displayed on a raster scan type display in a position spaced apart from the display to play a shooting game, the system comprising game processing apparatus being connected to said display for performing processing for the shooting game; a shooting scope, having a light receiving axis, used in a position spaced apart from said display for shooting the target displayed on said display on its light receiving axis; said shooting scope comprising; a sight attached to the shooting scope, a trigger signal generator for generating a trigger signal in response to an operation performed by a player, a photoelectric converter for converting light from a position which is shot on said display into an electric signal which is synchronized with raster scanning of said display, and a control signal transmitter for transmitting by optical space communication a control signal based on the electric signal output from said photoelectric converter to said game processing apparatus in response to said trigger signal from said trigger signal generator, said game processing apparatus comprising a control signal receiver for receiving the control signal transmitted from said control signal transmitter, shot coordinate position determining means for detecting a coordinate position which is shot by said shooting scope on said display on the basis of a raster coordinate position on said display at the time of receiving of said control signal by said control signal receiver, reference mark display controlling means for displaying a reference mark at a predetermined fixed position on said display before starting the game, an error detector for operating, when said reference mark is shot by said shooting scope, to detect an error between the coordinate position detected by said shot coordinate position detecting means and a coordinate position of said reference mark, an error storing device for storing the error detected by said error detector, a target display controller for displaying the target on said display while the game is played, correcting means for correcting, when the target on said display is shot by said shooting scope, the relative positional relationship between a coordinate position of the target and the coordinate position detected by said shot coordinate position detecting means on the basis of the error stored in said error storing device, and hit judging means for making a hit determination in a case where said target is shot by said shooting scope on the basis of said relative positional relationship after being corrected by said correcting means characterised in that the sighting axis of the sight has a predetermined angle with respect to the light receiving axis of said shooting scope, whereby said sighting axis intersects the light receiving axis of said shooting scope on said display when the distance between said shooting scope and said display is a predetermined distance. Accordingly, fine correction can be made in consideration of various factors (the change in distance between the display and the shooting scope, a player's habit, the variation in properties of products, and the like). Consequently, more accurate correction can be always made, as compared with the conventional case where correction is made on the basis of a fixed correction value, to allow accurate sighting and hit judgment. Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view illustrating a state where a shooting game system according to one embodiment of the present invention is used; Fig. 2 is a right side view illustrating a shooting scope shown in Fig. 1; Fig. 3 is a left side view illustrating the shooting scope shown in Fig. 1; Fig. 4 is a rear elevation illustrating the shooting scope shown in Fig. 1; Fig. 5 is a diagram showing the relationship between an optical axis of the barrel of the shooting scope shown in Fig. 1 and a sighting axis of a gunsight; Fig. 6 is a block diagram showing the structure of the shooting scope shown in Fig. 1; Fig. 7 is a timing chart for explaining the operation of the shooting scope; Fig. 8 is a block diagram showing the structures of a receiver and a video game set shown in Fig. 1; Fig. 9 is a block diagram showing the more detailed structure of a raster analyzing circuit shown in Fig. 8; Fig. 10 is a timing chart for explaining the operation of the raster analyzing circuit shown in Fig. 9; Fig. 11 is a block diagram showing the more detailed structure of a horizontal correcting circuit shown in Fig 8; Fig. 12 is a block diagram showing the more detailed structure of a vertical correcting circuit shown in Fig. 8; Fig. 13 is an illustration showing a memory map of a ROM contained in a ROM cartridge shown in Fig. 8; Fig. 14 is a timing chart for explaining a detecting operation of a shot coordinate position which is performed in the video game set shown in Fig. 8; Fig. 15 is a flow chart for explaining the operation of the video game set shown in Fig. 8; Fig. 16 is a flow chart showing the more detailed operation of a sighting correction mode subroutine shown in Fig. 15; Fig. 17 is an illustration showing one example of a sighting mark displayed on a television receiver; Fig. 18 is a block diagram showing the structures of a receiver and a video game set in another embodiment of the present invention; Fig. 19 is an illustration showing a memory map of a ROM contained in a ROM cartridge shown in Fig. 18; and Fig. 20 is an illustration showing a memory map of a working RAM shown in Fig. 18. DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 is a perspective view showing the construction of a shooting game system according to one embodiment of the present invention. In Fig. 1, a ROM cartridge 2 containing a memory (ROM) storing program data is detachably mounted on a video game set 1, and receiver 3 is connected thereto. The video game set 1 is further connected to a television receiver 4 and displays images of a target, a background and the like for a game on the television receiver 4 on the basis of the program data. Meanwhile, an optical disk may be used in place of the ROM cartridge 2 as means for storing program data. In this case, an optical disk recording and reproducing apparatus for reading recorded data of the optical disk is connected to the video game set 1 to transfer the program data read by the optical disk recording and reproducing apparatus. A player grasps a grip 6 of a shooting scope 5 in his one hand, carries the shooting scope 5 with a stock 7 on his shoulder, and puts the other hand in an approximately central part in the longitudinal direction of a barrel 8 to hold the shooting scope 5. The player uses the shooting scope 5 with a muzzle 9 being directed toward the television receiver 4 from a place spaced apart from the receiver 3. A control signal is converted into a light signal of infrared rays or the like to be transmitted to the receiver 3 in response to operations of a plurality of switches provided in an approximately central part in the longitudinal direction of the shooting scope 5. The video game set 1 changes image display and outputs voice in conformity to the progress of the game on the basis of the program data in response to the signal from the receiver 3. A gunsight 10 mounted on the upper part of the barrel 8 is so detachably constructed that it can be mounted on the right or left side to suit to player's own convenience. Figs. 2, 3 and 4 are respectively a right side view, a left side view and a rear elevation illustrating the shooting scope 5 used in one embodiment of the present invention. Referring now to Figs. 2 to 4, description is made of the structure of the appearance of the shooting scope 5. A stock 7 is provided beneath the rear in the longitudinal direction of a barrel 8. In addition, a grip 6 is provided beneath the front in the longitudinal direction of the barrel 8. Further, a gunsight 10 is detachably mounted on the upper front part in the longitudinal direction of the barrel 8. A trigger switch SW1, a pause switch SW2, and a power supply/continuous shooting switch SW3 are provided in an approximately central part of the barrel 8 and in the rear of the gunsight 10. The trigger switch SW1 and the pause switch SW2 are constructed as push button switches, and the power supply/continuous shooting switch SW3 is constructed as a slide switch. The trigger switch SW1 generates a single shooting signal every time it is depressed in a state where the power supply/continuous shooting switch SW3 as described water is in a second stopped position, and continuously generates a shooting signal in a time period during which it is depressed in a state where the power supply/continuous shooting switch SW3 is in a third stopped position. The pause switch SW2 generates a pause signal when it is depressed. The power supply/continuous shooting switch SW3 has three stopped positions, and gives a command to turn the power supply off in the first stopped position, to turn the power supply on in the second stopped position, and to select a continuous shooting mode in the third stopped position. A cursor switch SW4 is provided on the rear side surface of the grip 6. This cursor switch SW4 generates a display command signal of a cursor when it is depressed. The gunsight 10 comprises a mount 12, and a scope 13 and a foresight 14 which are held on this mount 12. The mount 12 is fixedly held on the barrel 8 by engaging claws 15 and 16 formed in the barrel 8. In addition, the mount 12 is so locked by a locking claw 17 formed in the barrel 8 that it does not slip off the engaging claws 15 and 16. Although the engaging claws 15 and 16 and the locking claw 17 are provided in the upper right front part in the longitudinal direction of the barrel 8 (on the right side as viewed from a muzzle 9), similar engaging claws 18 and 19 and locking claw 20 are provided in the upper left part of the barrel 8 (see Fig. 3). The engaging claws 15 and 16 and the locking claw 17 and the engaging claws 18 and 19 and the locking claw 20 are provided in positions symmetrical with respect to an optical axis of the barrel 8. As shown in Fig. 4, the gunsight 10 may be detached from the engaging claws 15 and 16 and mounted on the engaging claws 18 and 19. In the shooting scope according to the present embodiment, a position where the gunsight 10 is mounted can be thus changed to the most suitable position depending on whether a user of the shooting scope is right-handed or left-handed. Consequently, it is possible to obtain a shooting scope significantly superior in operability. As shown in Fig. 5, the shooting scope 5 according to the present embodiment is generally used in a position close to, that is, spaced approximately 3 meters apart from the television receiver 4. Consequently, if a sighting axis and the optical axis are parallel to each other, coordinates on the television screen of an extension line of the sighting axis and an extension line of the optical axis are considerably shifted. In the present embodiment, therefore, the shooting scope 5 is so constructed that when the gunsight 10 is mounted on the barrel 8, the gunsight 10 makes a predetermined angle to the optical axis such that the sighting axis crosses an optical axis of a condenser lens 31 (see Fig. 6) provided within the barrel 8 to form an intersection a predetermined distance (for example, approximately 3 meters) ahead of the muzzle 9. More specifically, the gunsight 10 is so selected that the sighting axis in a case where the foresight 14 is looked into from the scope 13 is slightly downward with respect to the bottom surface of the mount 12, and is mounted on the upper part of the barrel 8 and a position at an angle of 45° on the left or right side to the vertical axis passing through the optical axis. Consequently, whichever of the engaging claws 15 and 16 and the engaging claws 18 and 19, that is, whichever of the upper left and the upper right of the barrel 8 is a position where the gunsight 10 is mounted, the optical axis and the sighting axis can be made to cross (or concentrated on one point) on the screen of the television receiver 4 a predetermined distance ahead of the muzzle 9, thereby to make it possible to shoot the target accurately and with high precision. In addition, since the gunsight 10 is detachably constructed in the position at an angle of 45° on the right or left side to the optical axis, a player can surely aim at the target irrespective of the dominant hand, the dominant eye and the size of a player's face, thereby to make it possible to further improve the operability. When the distance between the shooting scope 5 and the television receiver 4 is varied as represented by dotted lines 4' and 4'' in Fig. 5 from the distance presumed (approximately 3 meters) as a result of inclining the sighting axis of the gunsight 10 from the optical axis of the barrel 8 as described above, the coordinate position on the television screen of the extension line of the optical axis and the extension line of the sighting axis is shifted The present embodiment is so constructed that the shift of the coordinate position, that is, an error is corrected according to the distance between the shooting scope 5 and the television receiver 4. Fig. 6 is a block diagram showing the inner structure of the shooting scope 5 shown in Fig. 1. In Fig. 6, the shooting scope 5 comprises a lens 31, slits 32 and 33, an infrared cut filter 34, a light receiving element 35, a pre-amplifier 36, a high-pass filter 37, a waveform shaping circuit 38, an AND gate 39, an OR gate 40, a driver 41, infrared LED (light emitting diode) 42, AND gates 43 and 44, a monostable multivibrator 45, an oscillator 46, an oscillator 47, a monostable multivibrator 48, an encoder 49, monostable multivibrators 51 to 54, and a OR gate 55. The lens 31 is provided in the vicinity of the muzzle 9 and forms an image of a target displayed on the television receiver 4 on the light receiving element 35. The slits 32 and 33 are used for eliminating undesired disturbance light from the exterior, and the inner diameter of the slit 33 is selected to be smaller than the inner diameter of the slit 32. The infrared cut filter 34 is used for preventing infrared rays from being incident on the light receiving element 35. The light receiving element 35 includes, for example, a photodiode, and detects a light signal from the target displayed on the television receiver 4 and converts the same into an electric signal. A detection signal of the light receiving element 35 is amplified by the pre-amplifier 36 and then, is applied to the high-pass filter 37. The high-pass filter 37 eliminates disturbance signals other than objective signals, for example, signals of sunlight, illuminating light and the like. An output of the high-pass filter 37 is subjected to waveform shaping by the waveform shaping circuit 38 and is converted into a pulse signal and then, is applied to the AND gate 39. An output of the AND gate 39 is applied to the driver 41 through the OR gate 40. The driver 41 is used for driving the infrared LED 42. The infrared LED 42 is provided inside of an infrared device 11 and sends out an infrared signal to the receiver 3. A trigger signal based on an operation of the trigger switch SW1 is applied to the AND gate 43 and is applied to the AND gate 44 after being inverted. A continuous shooting signal based on the power supply/continuous shooting switch SW3 is applied to the AND gate 44 and is applied to the AND gate 43 after being inverted. A cursor signal based on the cursor switch SW4 is applied to the oscillator 47. A pause signal based on the pause switch SW2 is applied to the monostable multivibrator 48. Respective outputs of the monostable multivibrator 45, the oscillators 46 and 47 and the monostable multivibrator 48 are applied to the encoder 49, The encoder 49 encodes the respective signals inputted An output of the encoder 49 is applied to the OR gate 40. The output of the monostable multivibrator 45 is further applied to the monostable multivibrator 53 and is applied to the monostable multivibrator 51 through the OR gate 50. The output of the oscillator 46 is further applied to the monostable multivibrator 51 through the OR gate 50. Outputs of the monostable multivibrators 51 and 53 are respectively applied to the monostable multivibrators 52 and 54. Outputs of the monostable multivibrators 52 and 54 are applied to the AND gate 39 through the OR gate 55. Description is now made of the operation of the shooting scope 5. First, a player carries the shooting scope 5 on his shoulder, and looks into the gunsight 10 to sight a target on the television screen, At this time, the lens 31 collects light on an image on the television screen in the vicinity of the optical axis of the barrel 8 and forms the image on the light receiving element 35. Consequently, the light receiving element 35 converts a light signal from the image in the vicinity of a portion to which the muzzle 9 is directed on the television screen (not the entire screen) into an electric signal and outputs the same. The output of the light receiving element 35 is subjected to amplification, noise removal and waveform shaping by the pre-amplifier 36, the high-pass filter 37 and the waveform shaping circuit 38 and is converted into a pulse signal. The light receiving element 35 outputs a detection signal every time a scanning line, that is, a raster passes through a region where the lens 31 collects light on the television screen. Accordingly, an output of the waveform shaping circuit 38 becomes a pulse train of raster pulses having a period according to the horizontal frequency of a television video signal (hereinafter referred to as a raster pulse train). This raster pulse train is shown in Fig. 7 (b). The player depresses the trigger switch SW1 when sighting of the target displayed on the television receiver 4 is terminated. Correspondingly, a trigger signal at a high level is outputted from this trigger switch SW1 and is applied to the monostable multivibrator 45 through the AND gate 43. The monostable multivibrator 45 outputs one pulse signal in response to this trigger signal. This pulse signal is applied to the encoder 49 to be encoded. As a result, the encoder 49 generates a trigger code as shown in Fig. 7 (a). This trigger code is applied to the driver 41 through the OR gate 40. The driver 41 drives the infrared rays LED 42 on the basis of the trigger code applied. Consequently, a trigger code serving as an infrared signal is outputted from the infrared LED 42, as shown in Fig. 7 (c). The output pulse signal of the monostable multivibrator 45 is further applied to the monostable multivibrators 51 and 53. Outputs of the monostable multivibrators 51 and 53 are respectively applied to the monostable multivibrators 52 and 54. The monostable multivibrators 52 and 54 output a gate pulse having a width represented by dotted lines in Fig. 7 (for example, a width corresponding to two frame periods). This gate pulse is applied to the AND gate 39 through the OR gate 55. Consequently, the AND gate 39 is opened in a time period during which this gate pulse is applied to pass the raster pulse train applied from the waveform shaping circuit 38. The raster pulse train passing through the AND gate 39 is applied to the driver 41 through the OR gate 40. Consequently, the infrared LED is driven according to the raster pulse train, and the raster pulse train serving as an infrared signal is outputted from the infrared LED (see Fig. 7 (c)). On the other hand, when the power supply/continuous shooting switch SW3 is slid to a continuous shooting position or when the cursor switch SW4 is depressed, a pulse signal having a constant period is outputted from the oscillator 46 or 47. In this case, therefore, the encoder 49 outputs a trigger code for each constant period. On the other hand, the monostable multivibrators 52 and 54 output the above described gate pulse for each constant period. As a result, the infrared LED 42 transmits the trigger code and the raster pulse train as shown in Fig. 7 (c) repeatedly for each constant period. Fig. 8 is a block diagram showing the structures of the video game set 1 and the receiver 3 shown in Fig. 1. In Fig. 8, the receiver 3 comprises an infrared pass filter 60, a light receiving element 61, a pre-amplifier 62, a high-pass filter 63, a waveform shaping circuit 64, a decoder 65, and a raster analyzing circuit 66. The infrared pass filter 60 is a filter for passing only infrared rags. Visible light is removed by this infrared pass filter 60, so that only the infrared signal from the above described infrared LED (see Fig. 6) is applied to the light receiving element 61. The decoder 65 is a circuit for decoding the trigger code sent from the shooting scope 5 and applying the same to the video game set 1. The raster analyzing circuit 66 is a circuit for extracting only a raster pulse from the signal detected by the light receiving element 61. The video game set 1 comprises an input port 70, a CPU 71, a working RAM 72, a video signal generating circuit 73, a horizontal counter 74, a vertical counter 75, a horizontal latch 76, a vertical latch 77, a horizontal correcting circuit 78, and a vertical correcting circuit 79. The input port 70 is a circuit for applying an output signal of the above described decoder 65 to the CPU 71. The CPU 71 is a circuit for performing various control operations on the basis of program data stored in a ROM cartridge 2. The working RAM 72 is a memory for storing various data required for control processing of the CPU 71. The video signal generating circuit 73 is a circuit for generating a video signal for a game in accordance with the data applied from the CPU 71. The horizontal counter 74 counts video clock pulses (clock pulses in a dot cycle) applied from the video signal generating circuit 73 and is reset by a horizontal synchronizing signal (HSYNC) applied from the video signal generating circuit 73. The vertical counter 75 counts a carry signal of the horizontal counter 74 and is reset by a vertical synchronizing signal (VSYNC) from the video signal generating circuit 73. The horizontal latch 76 latches a counted value of the horizontal counter 74 in response to a latch pulse from the raster analyzing circuit 66. The vertical latch 77 latches a counted value of the vertical counter 75 in response to the latch pulse from the raster analyzing circuit 66. The horizontal correcting circuit 78 is a circuit for correcting an output of the horizontal latch 76. The vertical correcting circuit 79 is a circuit for correcting an output of the vertical latch 77. Fig. 9 is a block diagram showing the more detailed structure of the raster analyzing circuit 66 shown in Fig. 8. In Fig. 9, the raster analyzing circuit 66 comprises a monostable multivibrator 80, a D-type flip-flop 81, a counter 82, a latch 83, a ROM 84, a comparator 85, AND gates 86 and 87, a quinary counter 88, an output allowing monostable multivibrator 89, an AND gate 90, and an input stopping monostable multivibrator 91. Description is now made of the operation of the receiver 3 shown in Fig. 8. The infrared LED 42 in the shooting scope 5 transmits control data based on the infrared signal as shown in Fig. 7 (c) toward the receiver 3. This infrared signal is applied to the light receiving element 61 after unnecessary visible light is removed by the infrared pass filter 60. An output of the light receiving element 61 is respectively subjected to amplification, noise removal and waveform shaping in the pre-amplifier 62, the high-pass filter 63 and the waveform shaping circuit 64 and then, is applied to the decoder 65 and the raster analyzing circuit 66. The decoder 65 decodes the trigger code included in the infrared signal and transmits the result of the decoding to the video game set 1. The input port 70 outputs the result of the decoding of the decoder 65 to the CPU 71. On the other hand, the raster analyzing circuit 66 analyzes a raster pulse train included in the waveform shaping circuit 64, extracts the sixth pulse from the raster pulse train and outputs the same. Referring now to Figs. 9 and 10, description is made of the more detailed operation of the raster analyzing circuit 66. When the raster pulse train as shown in Fig. 10 is applied to the monostable multivibrator 80, the monostable multivibrator 80 is first initiated by a raster pulse a. Correspondingly, the monostable multivibrator 80 outputs one pulse having a predetermined pulse width. This pulse is delayed by 1 µs by the D-type flip-flop 81 and then, is applied to the counter 82 as a clear signal. Consequently, the counter 82 is cleared. Thereafter, the counter 82 counts clock pulses having a frequency of 1 MHz. When a raster pulse b is then inputted, the monostable multivibrator 80 generates one pulse again. The latch 83 latches a counted value of the counter 82 in response to this pulse. The comparator 85 compares a value latched in the latch 83 with a value stored in the ROM 84. The ROM 84 stores a value of "63". When the value latched in the latch 83 is "63", that is, when the counter 82 counts 63 clock pulses having a frequency of 1 MHz between the raster pulse a and the raster pulse b (when the period between the raster pulse a and the raster pulse b is 63 µs), the comparator 85 outputs a coincidence signal at a high level. This coincidence signal passes through the AND gate 86 and increments the quinary counter 88. Subsequently, the raster pulses c, d, e, f, ... are sequentially inputted, to repeat the same operations as described above. Correspondingly, the quinary counter 88 is incremented every time one pulse is inputted. When the pulse f is inputted, the quinary counter 88 outputs a carry signal, to initiate the output allowing monostable multivibrator 89. Correspondingly, the output allowing monostable multivibrator 89 outputs one pulse. As a result, the AND gate 90 passes the pulse f and outputs the same to the video game set 1. At this time, the input stopping monostable multivibrator 91 is initiated by the output pulse of the output allowing monostable multivibrator 89. Consequently, one pulse is outputted from the input stopping monostable multivibrator 91. The monostable multivibrator 80 is inhibited from being initiated until the time when it is assumed that a raster pulse train in the succeeding frame is inputted in response to this pulse. Furthermore, the output pulse of the output allowing monostable multivibrator 89 is applied to the quinary counter 88 through the OR gate 92 as a clear signal. As a result, the quinary counter 88 is cleared. By the foregoing operations, the sixth pulse f in the raster pulse train is extracted and is applied to the video game set 1. More specifically, in the present embodiment, the sixth pulse f located in an approximately central part out of the plurality of raster pulses included in the raster pulse train is extracted as a horizontal scanning line which is shot by the shooting scope 5. The foregoing operations are performed when no noise is included in an input signal. When noise is included in an input signal by disturbance light from the exterior or the like, however, the period of pulses counted by the counter 82 deviates from 63 µs. As a result, the comparator 85 outputs no coincidence signal. Therefore, the AND gate 87 passes the input pulse from the monostable multivibrator 80 and outputs the same to the quinary counter 88 through the OR gate 92 as a clear signal. As a result, the quinary counter 88 is cleared before outputting a carry signal. Therefore, the output allowing monostable multivibrator 89 inhibits the input pulse f from being outputted. In the present embodiment, therefore, it is possible to prevent noise due to disturbance light or the like from being erroneously detected as a raster pulse. Fig. 11 is a block diagram showing the more detailed structure of the horizontal correcting circuit 78 shown in Fig. 8. In Fig. 11, the horizontal correcting circuit 78 comprises a correction value register 781, a ROM 782, and an operating circuit 783. Fig. 12 is a block diagram showing the more detailed structure of the vertical correcting circuit 79 shown in Fig. 8. In Fig. 12, the vertical correcting circuit 79 comprises a correction value register 791, a ROM 792, and an operating circuit 793. Fig. 13 is an illustration showing a memory map of a ROM contained in the ROM cartridge 2 shown in Fig. 8. In Fig. 13, the ROM contained in the ROM cartridge 2 comprises storage areas 201 to 204. The storage area 201 stores a game program for game processing. The storage area 202 stores horizontal coordinate data of a target and a sighting mark to be displayed on the television receiver 4. The storage area 203 stores vertical coordinate data of the target and the sighting mark to be displayed on the television receiver 4. The storage area 204 stores a program for displaying the target on the television receiver 4. Referring now to a timing chart of Fig. 14, description is made of the principle of a detecting operation of a coordinate position which is shot by the shooting scope 5 on the screen of the television receiver 4. When the receiver 3 receives a trigger code and a raster pulse train as shown in Fig. 14 (a), the raster analyzing circuit 66 extracts the sixth raster pulse included in the raster pulse train and outputs the same, as described above. This sixth raster pulse is applied to the horizontal latch 76 and the vertical latch 77 as a latch pulse. The horizontal latch 76 and the vertical latch 77 latch the counted value of the horizontal counter 74 and the counted value of the vertical counter 75 in response to this latch pulse. The counted values of the horizontal counter 74 and the vertical counter 75 respectively correspond to a horizontal position and a vertical position of the raster. Consequently, the counted values latched in the horizontal latch 76 and the vertical latch 77 correspond to a horizontal position and a vertical position which are shot by the shooting scope 5 on the screen of the television receiver 4. More specifically, the number of horizontal synchronizing signals included in a period from a vertical synchronizing signal in a vertical scanning period immediately before the present vertical scanning period to the sixth raster pulse extracted by the raster analyzing circuit 66 is latched in the vertical latch 77. On the other hand, the number of video clock pulses included in a period T from a horizontal synchronizing signal in a horizontal scanning period immediately before the present horizontal synchronizing period to the sixth raster pulse extracted by the raster analyzing circuit 66 is latched in the horizontal latch 76. Referring now to flow charts of Figs. 15 and 16, description is now made of the operation of the video game set 1. In the step S1 shown in Fig. 15, a sighting correction mode is first executed. This sighting correction mode is for displaying a sighting mark on the television screen before starting a game, and finding an error between a position which is shot by a player of the sighting mark and a central position of the sighting mark as a correction value. The details of such a sighting correction mode subroutine are shown in Fig. 16. Referring now to Fig. 16, in the step S20, the CPU 71 displays a sighting mark as shown in Fig. 17 in a central position of the screen of the television receiver 4. This operation in the step S20 is achieved by the CPU 71 reading out the target display program stored in the storage area 204 in the ROM cartridge 2 and executing the same. The program then proceeds to the step S21. In the step S21, the operating circuit 783 shown in Fig. 11 and the operating circuit 793 shown in Fig. 12 respectively read out sighting coordinate data stored in the ROMs 782 and 792 and store the data in an internal register. More specifically, the ROM 782 stores a horizontal coordinate position "128" of a center point P1 of the sighting mark, and the ROM 792 stores a vertical coordinate position "120" of the center point P1. The operating circuits 783 and 793 respectively accept the horizontal coordinate position and the vertical coordinate position of this center point P1 and hold them in the internal register. The program then proceeds the step S22. In the step S22, it is judged whether or not the trigger switch SW1 is turned on. If the trigger switch SW1 is turned on, the program proceeds to the step S23. In the step S23, the horizontal latch 76 and the vertical latch 77 respectively latch horizontal coordinate data and vertical coordinate data corresponding to a point P2 which is shot by the shooting scope 5 on the television screen in response to the latch pulse from the raster analyzing circuit 66. In an example shown in Fig. 17, a horizontal coordinate position of the point P2 is "130", and a vertical coordinate position thereof is "123". The program then proceeds the step S24. In the step S24, the operating circuit 783 operates a correction value in the horizontal direction. This operation of the correction value in the horizontal direction is performed by subtracting the horizontal coordinate data "128" of the center point P1 of the sighting mark from the horizontal coordinate data "130" of the point P2 latched in the horizontal latch 76. The program then proceeds to the step S25. In the step S25, the correction value in the horizontal direction which is operated in the step S24 is written in the correction value register 781. The program then proceeds to the step S26. In the step S26, the operating circuit 793 operates a correction value in the vertical direction. This operation of the correction value in the vertical direction is performed by subtracting the vertical coordinate data "120" of the center point P1 of the sighting mark from the vertical coordinate data "123" of the point P2 latched in the vertical latch 77. The program then proceeds to the step S27. In the step S27, the correction value in the vertical direction which is operated in the step S26 is written in the correction value register 791. Thereafter, the program is returned to the main flow shown in Fig. 15. Referring to Fig. 15 again, if a game mode is selected in the step S2, the CPU 71 reads out the game program from the storage area 201 in the ROM cartridge 2 and scrolls a background picture on the television receiver 4 in the step S3. The program then proceeds to the step S4. In the step S4, the CPU 71 displays a target on the television receiver 4. This display of the target is performed on the basis of the horizontal coordinate data and the vertical coordinate data of the target stored in the storage areas 202 and 203 in the ROM cartridge 2 and the target display program stored in the storage area 204 therein. At this time, the display size of the target is varied on the basis of the type of target and the distance to the target. for example, even if targets are of the same type, the targets are so displayed that the shape of the target passing through a distant place is smaller than the target passing through a near place. The program then proceeds to the step S5. In the step S5, the CPU 71 reads an output of the decoder 65 through the input port 70. Subsequently, the program proceeds to the step S6. In the step S6, the CPU 71 judges whether or not the trigger switch SW1 is turned on, that is, the trigger code is detected by the decoder 65. At this time, when it is judged that the trigger switch SW1 is not turned on, the CPU 71 is returned to the operation in the step S3 again. On the other hand, if it is judged in the step S6 that the trigger switch SW 1 is turned on, the program proceeds to the step S7. In the step S7, the operating circuits 783 and 793 operate display coordinates of a missile which is one example of a projectile shot from the shooting scope 5 on the basis of the horizontal and vertical coordinate data latched in the horizontal latch 76 and the vertical latch 77 and horizontal and vertical correction values stored in the correction value registers 781 and 791. More specifically, the operating circuit 783 subtracts the correction value stored in the correction value register 781 from the horizontal coordinate data latched in the horizontal latch 76 (horizontal coordinate data in a position which is shot by the player on the television screen), and outputs the result of the subtraction to the CPU 71. Similarly, the operating circuit 793 subtracts the correction value stored in the correction value register 791 from the vertical coordinate data latched in the vertical latch 77 (vertical coordinate data in a position which is shot by the player on the television screen) and outputs the result of the subtraction to the CPU 71. The program then proceeds to the step S8. In the step S8, the CPU 71 displays the missile on the television screen on the basis of display coordinate data of the missile which is applied from the operating circuits 783 and 793. The program then proceeds to the step S9. In the step S9, it is judged whether or not the missile displayed in the step S8 hit the target displayed on the television screen. At this time, unless it hit the target, the program proceeds to the step S10. In the step S10, the CPU 71 scrolls the target. The program then proceeds to the step S11. In the step S11, the CPU 71 scrolls a background picture. The program then proceeds to the step S12. In the step S12, the CPU 71 further reduces the display size of the missile so as to indicate that the missile flew to the distance without hitting the target. The program then proceeds to the step S13. In the step S13, the CPU 71 judges whether or not a constant time period has elapsed. Unless a constant time period has elapsed, the operations in the steps S9 to S12 are repeated again. On the other hand, if a constant time period has elapsed, the program proceeds to the step S14. In the step S14, the CPU 71 displays on the television receiver 4 the fact that the missile missed the target. Thereafter, the program is returned to the operation in the step S3. On the other hand, if it is judged in the step S9 that the missile hit the target, the program proceeds to the step S15. In the step S15, the CPU 71 displays on the television receiver 4 the fact that the missile hit the target. The program then proceeds to the step S16. In the step S16, the CPU 71 produces an explosive sound from the television receiver 4. The program then proceeds to the step S17. In the step S17, the CPU 71 operates and displays the score. The program then proceeds to the step S18. In the step S18, the CPU 71 judges whether or not the game is over. If the game is not over, the program is returned to the operation in the step S3 again. On the other hand, it is judged that the game is over, the program proceeds to the step S19. In the step S19, the CPU 71 displays on the television receiver 4 a state where the game is over. Thereafter, the operations are terminated. Fig. 18 is a block diagram showing the structures of a receiver and a video game set according to another embodiment of the present invention. The structure of the receiver 3 is the same as the structure of the receiver 3 shown in Fig. 8. On the other hand, the structure of the video game set 100 shown in Fig. 18 differs from the structure of the video game set 1 shown in Fig. 8 in that the horizontal correcting circuit 78 and the vertical correcting circuit 79 are eliminated. Alternatively, correcting operations performed in the horizontal correcting circuit 78 and the vertical correcting circuit 79 are performed by program processing by a CPU 71. Therefore, storage areas 205 and 206 are added as shown in Fig. 19 to a ROM cartridge 2. The storage area 205 stores a program for realizing correction processing which is executed in the step S7 shown in Fig. 15. In addition, the storage area 206 stores a program for realizing an operation of a correction value which is executed in the sighting correction mode shown in Fig. 16. Fig. 20 is an illustration showing a memory map of a working RAM 72 in the embodiment shown in Fig. 18. As shown in Fig. 20, the working RAM 72 comprises storage areas 721 to 726. The storage area 721 stores horizontal coordinate data in a shot coordinate position which is latched by a horizontal latch 76. The storage area 722 stores vertical coordinate data in the shot coordinate position which is latched by a vertical latch 77. The storage area 723 stores horizontal coordinate data in the shot coordinate position after being corrected which is operated by the CPU 71. The storage area 724 stores vertical coordinate data in the shot coordinate position after being corrected which is operated by the CPU 71. The storage area 725 stores a correction value in the horizontal direction which is operated in a sighting correction mode by the CPU 71. The storage area 726 stores a correction value in the vertical direction which is operated in the sighting correction mode by the CPU 71. In the embodiment shown in Fig. 18 of the above described construction, the CPU 71 reads out the respective programs and coordinate data of a target from the respective storage areas 201 to 206 in the ROM cartridge 2 and process them, thereby to sequentially perform the operations shown in the flow charts of Figs. 15 and 16 in approximately the same manner as described above. As described in the foregoing, according to the present invention, the error between the reference mark displayed on the television screen before starting the game and the coordinate position which is shot by the shooting scope is previously operated as a correction value, and the coordinate position which is shot is corrected on the basis of this correction value while the game is played. Accordingly, more accurate correction can be always made, as compared with the conventional case where correction is made on the basis of a fixed correction value. Consequently, accurate sighting and hit judgment are always allowed irrespective of the distance between the television receiver and the shooting scope, a player's habit, the variation of products, and the like. Furthermore, according to the present invention, only the control signal is extracted from the pulse signals included in the receiving signal of the control signal receiving means to detect the shot coordinate data on the basis of the periodicity of the pulse signals. Accordingly, it is possible to prevent a malfunction due to disturbance light from the exterior or the like. Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the present invention being limited only by the terms of the appended claims.

Claims: A shooting game system for shooting a target displayed on a raster scan type display (4) in a position spaced apart from the display to play a shooting game, comprising: game processing apparatus (1) being connected to said display for performing processing for the shooting game; a shooting scope (5), having a light receiving axis, used in a position spaced apart from said display for shooting the target displayed on said display on its light receiving axis; said shooting scope comprising; a sight (10) attached to the shooting scope, a trigger signal generator (49) for generating a trigger signal in response to an operation performed by a player, a photoelectric converter (35-38) for converting light from a position (P2) which is shot on said display into an electric signal which is synchronized with raster scanning of said display, and a control signal transmitter (42) for transmitting by optical space communication a control signal based on the electric signal output from said photoelectric convertor (35-38) to said game processing apparatus in response to said trigger signal from said trigger signal generator (49), said game processing apparatus comprising a control signal receiver (3) for receiving the control signal transmitted from said control signal transmitter (42), shot coordinate position determining means (76,77) for detecting a coordinate position (P2) which is shot by said shooting scope on said display on the basis of a raster coordinate position on said display at the time of receiving of said control signal by said control signal receiver (3) reference mark display controlling means (782,792) for displaying a reference mark (P1) at a predetermined fixed position on said display before starting the game, an error detector (71) for operating, when said reference mark is shot by said shooting scope, to detect an error between the coordinate position detected by said shot coordinate position detecting means and a coordinate position of said reference mark, an error storing device (781,791) for storing the error detected by said error detector, a target display controller (204) for displaying the target on said display while the game is played, correcting means (78,79) for correcting, when the target on said display is shot by said shooting scope (5), the relative positional relationship between a coordinate position of the target (P1) and the coordinate position detected by said shot coordinate position detecting means (76,77) on the basis of the error stored in said error storing device (781,791), and hit judging means (71) for making a hit determination in a case where said target is shot by said shooting scope (5) on the basis of said relative positional relationship after being corrected by said correcting means (78,79) characterised in that the sighting axis of the sight (10) has a predetermined angle with respect to the light receiving axis of said shooting scope, whereby said sighting axis intersects the light receiving axis of said shooting scope on said display (4) when the distance between said shooting scope and said display is a predetermined distance. The shooting game system according to claim 1, characterised in that said correcting means (78,79) is adapted to correct the coordinate position detected by said shot coordinate position detecting means (76,77) on the basis of the error stored in said error storing device (781,791) and said hit judging means (71) is adapted to make said hit determination by comparing the coordinate position of said target P1 with the coordinate position corrected by said correcting means (78,79). The shooting game system according to claims 1 or 2, characterised in that the control signal transmitted by said control signal transmitter (42) includes a plurality of pulse signals which are synchronized with raster scanning of said display, said game processing apparatus further comprises control signal extracting means (66) for extracting only the control signal transmitted by said control signal transmitter (42) from a received signal of said control signal receiver on the basis of the periodicity of a plurality of pulse signals included in the received signal, and said shot coordinate position detecting means (76,77) detects the coordinate position which is shot by said shooting scope on said display (4) on the basis of the control signal extracted by said control signal extracting means (66). The shooting game system according to claim 3, characterized in that said control signal extracting means (66) extracts a n-th (where n is a predetermined integer) pulse signal out of the plurality of pulse signals included in the received signal of said control signal receiver (3) as a pulse signal corresponding to raster scan light from the coordinate position which is shot by said shooting scope on said display (4), and said shot coordinate position detecting means (76,77) detects the coordinate position which is shot by said shooting scope on said display on the basis of said n-th pulse signal. The shooting game system according to claims 3 or 4, characterised in that said control signal extracting means (66) comprises period detecting means (81,82) for sequentially detecting the respective periods of the plurality of pulse signals included in the received signal of said control signal receiver (3), a coincidence detector (85) for detecting the coincidence of the period detected by said period detecting means (81,82) with the raster scanning period of said display, a counter (88) for counting the number of times of detection of the coincidence of the periods of said coincidence detector (85) and pulse signal applying means (89) for applying said n-th pulse signal included in the received signal of said control signal receiver (3) to said shot coordinate position detecting means (76,77) in response to the count of said counting means (88) reaching a predetermined value. The shooting game system according to any one of claims 3 to 5, characterised in that said control signal extracting means (66) further comprises inhibiting means (91) for inhibiting the pulse signal from being applied to said shot coordinate position detecting means (76,77) in response to detection of the noncoincidence of the periods by said coincidence detector (85) before the counted value of said counter (88) reaches a predetermined value. The shooting game system according to any preceding claim, characterised in that said game processing apparatus includes image processing apparatus (71,73) being connected to said display (4) for displaying an image for the shooting game on said display and wherein said control signal receiver (3) is connected to said image processing apparatus, said shot coordinate position detecting means (76,77), said reference mark display controlling means (782,792), said error detector (71), said error storing device (781,791), said target display controlling means (71,204), said correcting means, and said hit judging means (71) being contained in said image processing apparatus.

Inventors: MIYAKE MASAHITO, MIYAKE, MASAHITO, Miyake, Masahito, c/o Nintendo Co. Ltd.
Applicants: NINTENDO CO LTD, NINTENDO CO. LIMITED
Application year: 1992
Main classification: A63F9
IPC codes: A63F9, A63F13, F41G3