US3659285A

US3659285A - Television gaming apparatus and method

Info

Publication number: US3659285A
Application number: US851865A
Authority: US
Inventors: Ralph H Baer; William T Rusch; William L Harrison
Original assignee: Sanders Associates Inc
Current assignee: Lockheed Corp
Priority date: 1969-08-21
Filing date: 1969-08-21
Publication date: 1972-04-25
Anticipated expiration: 1989-04-25
Also published as: SE7415697L; JPS5028206B1; SE377889B; BE754932A; CH534989A; IL34263A; DE2030959B2; GB1328223A; NL7012341A; DE2030959A1; DE2030959C3; SE408373B; CA999888B; MY7500261A; FR2059595A1; IL34263A0; FR2059595B1

Abstract

Apparatus and methods are herein disclosed for use in conjunction with standard monochrome and color television receivers, for the generation, display and manipulation of symbols upon the screen of the television receivers for the purpose of playing games, training simulation and for engaging in other activities by one or more participants. The invention comprises in one embodiment a control unit, connecting means and in some applications a television screen overlay mask utilized in conjunction with a standard television receiver. The control unit includes the control means, switches and electronic circuitry for the generation, manipulation and control of video signals representing symbols which are to be displayed on the television screen. The symbols are generated by voltage controlled delay of pulses and coincidence gating. The connecting means couples the video signals to the receiver antenna terminals thereby using existing electronic circuits within the receiver to process and display the signals. An overlay mask which may be removably attached to the television screen may determine the nature of the game to be played. Control units may be provided for each of the participants. Alternatively, games may be carried out in conjunction with background and other pictorial information originated in the television receiver by commercial TV, closedcircuit TV or a CATV station.

Description

United States Patent Baer et al.

3,659,285 Apr. 25, 1972 Primary ExaminerDavid L. Trafton Attorney-Louis Etlinger [72] Inventors: Ralph H. Baer, Manchester; William T.

Rusch, Hollis; William L. Harrison, 57 ABSTRACT Nashua, all of NH. I Apparatus and methods are herein disclosed for use in con- [73] Asslgnee: Sanders Associates, Inc., Nashua, NH. j nction with standard monochrome and color television [22] Filed: Aug. 21, 1969 receivers, for the generation, display and manipulation of symbols upon the screen of the television receivers for the purpose PP 851,865 ofplaying games, training simulation and for engaging in other activities by one or more participants. The invention com 52] US. 01. ..340/324A 178/68 250/217 CR prises embdimm nit, means 273/85 3i5/22 315/30 and in some applications a television screen overlay mask util- 511 1m. 01. ..Gtl8b 5 22 with a sandard 618mm receive" The 58 Field of Search ..340 324 A' 315/18 22 30- includes the means swim and elec' 328/110 87 189 227 228 tronic circuitry for the generation, manipulation and control 256/217 of video signals representing symbols which are to be displayed on the television screen. The symbols are generated by 5 6 1 References Cited voltage controlled delay of pulses and coincidence gating. The

connecting means couples the video signals to the receiver an- UNITED STATES PATENTS tenna terminals thereby using existing electronic circuits within the receiver to process and display the signals. An over- 2,847,661 8/1958 Althouse ..3l5/22 X lay mask which may be removably attached to the television 3,153,858 H/I964 Rage" A X screen may determine the nature of the game to be played. 2595-646 5/ 1952 9 ""340/324 A x Control units may be provided for each of the participants. Al- 3,189,889 6965 Bridgett --340/324A ternatively, games may be carried out in conjunction with 1 1/1962 Evans 340/324 A background and other pictorial information originated in the sl g television receiver by commercial TV, closed-circuit TV or a 0 ltt CATV station 3,497,760 2/1970 Kiesling .....l78/6.8 X 3,334,236 8/1967 Bacon ..250/2l7 CR 12 Claims, 37 Drawing Figures L 63.5 /s -l Egg: 33 SEC HORY SYNC PULSES sYNc GEN. I W 1 1 DOT 1 I IPH non VIDEO HOR -ll- 3 MOD. DELAYED 1 T 1 AND WH I l RF PULSES osc.

' 1 nor 2 VIDEO 28mm wiLAYED H H GATE PULSES k- I666 Ms l 3m s WV VERT SYNC PULSES DOT 1 :1 l: EEEKYED ,L I T0 rv v 1 P I ANTENNA PULSES I WV TERM1NAL DQT 2 :l:l S E'ZKYED WV PVZ PULSES PATENTEDAPRZSIQYZ 3,659,285

sum o1ur17 FIGI m FIGZ INVENTORS RALPH H. BAER WILLIAM T. RUSCH 3O WILLIAM LHARRISON ATTOQNEY PATENTEDIPR 25 I972 SHEET OR [IF 17 sYN'c PULSES as CONTROL 48 cc SIGNAL VER'I. SYNC PULSES CONTRO SIGNAL L CONTROL SIGNAL FIG. 8A

CONTROL SIGNAL n LIIJL FIG6 FIG. 7A

VIDEO SIGNAL i sea 57 so FIGSB CONTROL SIGNAL INVENTORS RALPH H. BAER WILLIAM T RUSCH WILLIAM L. HARRISON PATENTEIJAFRZSISTZ 3.659.285

sum nsnr17 r Q a 84 c N ki] A HIT -GEN. VOLTAGE CONTROL H L. as b 4 d Q 70 7| 78 H\g -l3 V HIT DOT 65:12 76 cc l I E 73 H|T::NG:D:O:T:G::. H F I G 9 8| HIT GEN.

, CONTROL VOLTAGE HIT DOT GEN. AF-o a: I VCC AN\ .V

CC lNl/ENTORS RALPH H. BAER WILLIAM T. RUSCH WILLIAM LHARRISON BY U/ I ww ATTORNEY PATENTED APR 2 5 1912 SHEET 05 [1F 17 nil N O m m H m: @1 8 M m w m .T L. A .1 J Wm M mum ALL Y RWW B @E 52 5 m 523 mMEEDm v TO TV SHEET 10 [IF IT SUMMER R F OSCILLATOR MODULATOR PATIIIDIPR 25 m2 N m 5 H R R m SR n M A N M 5 N M II U L E G NN Y T.. R B O 8 I w 2 W 5 m 6 V I 1.7:: In I, 6 n w TY: z v T E L I L 4 L 5 FIGI5B PIITENTEIJIPR 25 m2 659 .285

sum in or 1? To MULTIVIBRATOR (-)2m "2 TO MULTIVIBRATOR 2n IAIVENTORS RALPH H. BAER WILLIAM F RUSCH WILLIAM L. HARRISON ATTORNEY PATENTimmzsma 3,659,285

sum 17 or 17 F-Lr- 1r-T' VERT. HORIZ. SYNC SYNC GEN. GEN.

F1 LI-L v 275- DOT SUMMER GENERATOR R F OSCILLATOR F I G 2 I MODULATOR T E TO TV ANTENNA TERMINALS GUN ELECTRONICS ONE SHOT PRIMARY MULTIVIBRATOR FLIP FLOP HOR. SYNC I PULSES 7 VIDEO 250 SIGNAL CONTROL SIGNAL VERT. SYNC PULSES mvmmns RALPH H. BAER WILLIAM T. RUSCH 6 WILLIAM L. HARRISON BY CONTROL 4 SIGNAL A TTU/PNE Y TELEVISION GAMING APPARATUS AND METHOD REFERENCES TO RELATED APPLICATIONS This invention relates to the subject matter of Application Ser. No. 126,966 filed Mar. 22, 1971, a continuation of Application Ser. No. 697,798 filed Jan. 15, 1968, now abandoned; and application Ser. No. 828,154 filed May 27, 1969.

BACKGROUND OF THE INVENTION This invention relates to apparatus and methods by means of which standard television receivers can be utilized as active rather than passive instruments or, alternatively, to special television receivers constructed for active operation by participants. This is accomplished in certain embodiments by having participants manipulate controls of a control unit connected to the television receiver to cause a symbol, such as a square, or a plurality of symbols, to be displayed upon the television screen by means of which the participants can play a variety of games, participate in simulated training programs, as well as carry out other activities. By way of example, modified versions of the well-known game of ping-pong may be played by two participants by physically or electronically placing an appropriate mask representing the net upon the screen of the television receiver. Three displayed dots represent two paddles and a ball wherein the ball is moved in a particular direction when hit" by a paddle.

Heretofore, color and monochrome television receivers have been used generally by the home and other viewers as passive devices; i.e., the television receiver is used only as a display means for programming originating at a studio. The viewer is limited to selecting the presentations available for viewing and is not a participant to the extent that he can control or influence the nature of, or add to the presentation displayed on the receiver screen.

A standard receiver employed with auxiliary equipment to provide an active form of home entertainment is described in patent applications for Television Gaming and Training Apparatus Ser. No. 126,966 filed Mar. 22, 1971, a continuation of Ser. No. 697,798, filed Jan. 15, 1968 and Television Gaming Apparatus and Method Ser. No. 828,154, filed May 27, 1969, both assigned to the assignee of this application. Since most homes are equipped with television receivers, the only expense required to provide added family enjoyment as well as training means is the expense of a control unit of one type or another.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide apparatus and methods for displaying video signals on the screen of a television receiver, where some or all of the video signals are both generated and controlled by apparatus external to the television receiver.

It is another object of the present invention to provide an apparatus and method wherein a standard color or monochrome television receiver is utilized as an active instrument for playing various types of games involving one or more participants.

It is a further object of the present invention to provide a device whereby an individual may pit his alertness, skill, manual dexterity and visual acuity against automatically controlled video displays.

It is yet a further object of the present invention to provide an apparatus which will generate dots such as squares which may be controlled by one or more participants for playing various types ofgames.

It is another object of the present invention to provide a cathode ray tube apparatus for displaying symbols to be manipulated by participants.

It is yet another object of the present invention to provide an apparatus which will allow one or more participants to actively use a standard television set while receiving background and other pertinent pictorial information from a cooperative commercial TV, closed-circuit TV, or CATV station, thus LII combining or alternating studio and home-generated information on the TV screen.

It is still another object of the present invention to allow the use of a standard TV set for gaming or other activities without the need for any kind of internal electrical connection to the TV set for the introduction of video and/or chroma signals, connections being required to be made only to the externally accessible antenna terminals.

In accordance with one embodiment of the present invention, a television gaming apparatus is provided for generating video signals in accordance with the standardized television format, which signals may be controlled by an individual operator by means of a joystick or other manually operative means. The television gaming apparatus comprises control apparatus having included therein the necessary electronic circuits to produce video signals which are compatible with standard television receivers.

The control apparatus has video signal control means mounted thereon for easy access and connecting means are provided for coupling the video signals generated within the control box to the television receiver.

By way of illustration, the television gaming apparatus can be used for playing a game of ping-pong by providing on a TV screen two dots which represent paddles. Means are provided for enabling the players to control the vertical movement of the paddle dots. Means are also provided for generating on the screen of the television receiver a third dot which represents the ping-pong ball. This dot can be made to move from an offscreen left position to an off-screen right position and vice versa unless hit by a paddle dot whereupon the ball dot will change direction. The players have further controls for changing the vertical position of the ball dot.

Suitable overlays or presentations from a cooperative TV station may be used in conjunction with said games to enhance the asthetic appeal thereof. Alternatively, presentations such as a ping-pong net may be generated by controls in the hands of the participants.

BRIEF DESCRIPTION OF THE DRAWINGS The above-mentioned and other features and objects of this invention will become more apparent by reference to the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a pictorial view illustrating the principle components of an embodiment of the invention including a television receiver and a control unit;

FIG. 1A is a pictorial view illustrating an alternate embodiment for the control unit of FIG. 1;

FIG. 2 is a sketch illustrating a typical TV screen and overlay mask as employed in an embodiment of this invention;

FIG. 3 is a sketch illustrating the manner in which dots are formed on a TV screen;

FIG. 4 is a block diagram illustrating the general theory of dot generation;

FIG. 5 is a block diagram of the preferred mode of generating dots on a TV screen;

FIG. 6 is a schematic of a sync generator employed in the embodiment of FIG. 5;

FIG. 7A is a schematic of a dot generator employed in the embodiment of FIG. 5;

FIG. 7B are waveforms illustrating operation of the circuit of FIG. 7A;

FIGS. 8A-8C are schematics of controls used to generate control signals for the dot generator of FIG. 7;

FIG. 9 is a schematic of a primary flip-flop arrangement used in many of the gaming applications;

FIG. 10 is a schematic of a secondary flip-flop arrangement used in certain ones of the gaming applications;

FIG. 11A is a diagram of apparatus for a simulated pingpong type game;

FIG. 11B is a sketch of a television screen illustrating the manner of play of the ping-pong game of FIG. 11A;

FIG. 12A is a diagram of apparatus for a simulated handball type game;

FIG. 12B is a sketch of a television screen illustrating the manner of play of the handball game of FIG. 12A;

FIG. 13A is a diagram of apparatus for a simulated volleyball type game;

FIG. 13B is a sketch of a television screen illustrating the manner of play ofthe volleyball game of FIG. 13A;

FIG. 14A is a diagram of electronic apparatus for a simulated golf putting game;

FIG. 14B is a sketch of the input control for the apparatus of FIG. 14A;

FIG. 14C is a sketch of a television screen illustrating the manner of play ofthe golf putting game of FIG. 14A;

FIG. 15A is a diagram of apparatus for a pumping" game;

FIG. 15B is a sketch of a television screen illustrating the manner of play of the pumping game of FIG. 15A;

FIG. 16 is a diagram of apparatus for a target shooting game;

FIG. 17 is a schematic ofa chroma signal generator;

FIG. 18A is a schematic of another embodiment of a dot generator;

FIG. 18B is a sketch of illustrative video signals of the dot generator of FIG. 18A;

FIG. 19A is a block diagram of apparatus for controlling a hit" dot;

FIG. 19B is a sketch illustrating the manner in which the apparatus of FIG. 19A controls a hit dot;

FIG. 19C is a schematic of the horizontal gated differentiator ofFIG. 19A;

FIG. 19D is a schematic of the bilateral switch, integrator and wall bounce ofFIG. 19A;

FIG. 20A is a diagram of electronic apparatus for a simulated race game;

FIG. 20B is a schematic of a dot generator having position controlled dot size;

FIG. 20C is a sketch of a television screen illustrating the manner of play of the race game of FIG. 20A; and

FIG. 21 is a diagram of electronic apparatus for a left-right shooting game.

DESCRIPTION OF PREFERRED EMBODIMENTS The principal components of one embodiment of a television gaming system configured according to the invention are illustrated in FIG. 1 which is a pictorial view showing a television receiver 10, a control unit 14 and means 12 for connecting control unit 14 to receiver 10. The television receiver 10 employed can be any of the standard commercially available models that are generally used for home entertainment. Either a monochrome or color television set may be used with the present invention since the basic principles of the invention apply to both types. The connection means 12 is in this embodiment a cable, for example, shielded or unshielded twinlead, and is attached to the antenna terminals of receiver 10 in conventional fashion.

Control unit 14 generates video signals shown as dots 20 20 and 21. The dots 20 and 20 are positioned on the receiver screen 18 by knobs 16 17,, and 16 17 respectively.

Knob 16 controls the vertical position of dot 20 while knob 17 controls the horizontal position thereof. Thus, it can be seen that the dot 20 many be positioned at any point on the screen by the proper manipulation of knobs l6, and 17 Dot 20 is positioned in like manner by knob 16 17 In this embodiment dot 21 can be automatically positioned on screen 18 without manual control. This will be described more fully hereinafter. A pair of serve/reset switches 11, 13 are shown on the control unit 14 and are used to reset the picture on the television screen or serve" a simulated ball. For example, a game may be played in which one dot is to be positioned over the other and when this is accomplished one dot will disappear and/or the background will change color. When games of this nature are played, a reset means is required before play can be resumed. Serve reset switches 11, 13 can perform this function as well as other functions to be described hereafter.

A knob 15 controls background color for color TV receiver applications wherein a chroma generator is employed in the manner set forth in said application Ser. No. 126,966.

Alternatively, control unit 14 may be broken up into a master control unit containing the electronic circuits and in dividual control units containing control knobs 16 17, and 16 17 and switches 11 and 13, whereby each participant may operate from a position away from the other and so not to interfere with other players. This is illustrated in FIG. 1A wherein control unit 14 is broken up into a master control unit 27 and

individual control units

22 and 23. The master control unit 27 contains the electronic circuitry found in control unit 14 and control knob 15.

Knobs

16,, 17, and 16 and 17 which position the dots 20 and 20 and switches 11 and 13 are situated on

individual control units

22 and 23, respectively. More than two control units may be provided when additional participants are to take part.

For playing certain games knobs 16, 17 may be combined into a single joystick permitting control of the horizontal and vertical spot positioning by a single control means.

Other dot positioning control means (not shown) can be incorporated into the control unit(s) and these will be described hereinafter.

Rather than provide a separate control unit, the electronic circuitry of the control unit can be built into the television receiver as a constituent part thereof with control units containing the actual manipulating controls being provided as above and the receiver sold as both an active and passive home entertainment system.

A typical sequence of steps to play a game using the present invention would be as follows: 1. Attach connection means 12 to TV set 10 at the antenna terminals thereof, if not already attached; 2. turn the TV set on; 3. select the proper channel on the set for the control unit being used; 4. apply power to the control unit; 5. attach a mask on the face of the TV screen; if required for the game to be played; 6. begin the game.

Referring now to FIG. 2, a television screen 18 is illustrated having three dots 24,, 24 and 25 displayed thereon. Dots 24 are hitting dots and dot 25 is a hit dot. Dots 24 and 24 represent, for example, ping-pong paddles while dot 25 represents a ping-pong ball. An overlay mask 30 of some type of transparent material such as plastic or the like, having some type of pattern, picture or other illustration pertaining to the particular game to be played is shown in a lifted position. Prior to engaging in a game, the overlay mask 30 is temporarily attached to television screen 18 and in such close proximity to it as not to create any distortion when viewed with reference to dots 24 and 25. One type of overlay mask represents a pingpong net 19 to be used for playing a modified game of pingpong. Still another pattern could represent a handball or volleyball court, etc. These are but a few of the many type games that can be adapted for use with the present invention.

Alternatively, rather than employ overlay mask 30, the pattern to be provided could be displayed directly on the screen 18. The pattern can be broadcast by TV stations or alternatively can be sent to a non-used channel over closed-circuit or CATV lines. It can also be generated electronically in the video control system.

The basic theory of TV gaming devices as described herein is now set forth.

Referring to FIG. 3, at time zero the TV electron beam is at the upper left of screen 18. It starts moving quickly to the right and slowly downwards. Sixty-three and one-half microseconds later a 5 microsecond horizontal sync pulse is fed into the TV set, causing the beam to fly back rapidly to the left of the screen. The beam then moves to the right for 63.5 microseconds until the next horizontal sync pulse causes the next flyback to the left. After about 250 such horizontal scans (lines) the beam has progressed to the bottom of the screen. A vertical sync pulse fed into the TV set causes rapid (1 mil-

Claims

1. In combination with a standard television receiver, apparatus for generating signals representing a first and second ''''hitting'''' symbol and a ''''hit'''' symbol to be displayed on the screen of said television receiver, comprising: means for generating horizontal and vertical sync signals; means for generating a vertical train of square pulses; means for generating a horizontal train of square pulses; a first ''''hitting'''' symbol generator; a second ''''hitting'''' symbol generator; a ''''hit'''' symbol generator; means for applying said vertical and horizontal trains of square pulses to said symbol generators; means for generating first and second control signals for said first ''''hitting'''' symbol generator; means for coupling said first and second control signals to said first ''''hitting'''' symbol generator; means for generating third and fourth control signals for said second ''''hitting'''' symbol generator; means for coupling said third and fourth control signals to said second ''''hitting'''' symbol generator; means for generating fifth and sixth control signals for said ''''hit'''' symbol generator; means for coupling said fifth and sixth control signal to said ''''hitting'''' symbol generator; means for coupling said first, second, third and fourth control signals to said means for generating fifth and sixth control signals; and means for coupling the outputs of said symbol generators and said sync signals to the television receiver.

2. In combination with a standard television receiver, apparatus for generating symbols upon the screen of the receiver to be manipulated by at least one participant, comprising: means for generating a ''''hitting'''' symbol; means for generating a movable ''''hit'''' symbol; means for generating a fixed ''''hit'''' symbol; means for denoting coincidence between said movable ''''hit'''' symbol and said ''''hit'''' fixed symbol; means for causing said movable ''''hit'''' symbol to move away from said fixed ''''hit'''' symbol when coincident therewith; and means for displaying said symbols.

3. Apparatus for playing volleyball type games by displaying and manipulating symbols on the screen of a cathode ray tube, comprising: means for generating a first ''''hitting'''' dot; means for generating a second ''''hitting'''' dot; means for generating a ''''hit'''' dot; means for generating a ''''net'''' symbol; means for changing the vertical position of said first ''''hitting'''' dot; means for changing the vertical position of said second ''''hitting'''' dot; means for causing said ''''hit'''' dot to move from an off-screen left position of an off-screen right position and vice versa; means for changing said off-screen right and off-screen left positions; means for denoting coincidence between either of said ''''hitting'''' dots and said ''''hit'''' dot; means for causing said ''''hit'''' dot to change horizontal direction upon coincidence between said ''''hit'''' dot and either of said ''''hitting'''' dot; means for denoting coincidence between said ''''hit'''' dot and said ''''net'''' symbol; and means for displaying said dots upon the screen of said cathode ray tube.

4. Apparatus for playing volleyball type games is defined in claim 3, further including means for causing said ''''hit'''' dot to disappear upon coincidence between said ''''hit'''' dot and said ''''net'''' symbol.

5. Apparatus for generating signals representing a first and second ''''hitting'''' symbol and a ''''hit'''' symbol to be displayed on the screen of a television receiver, compriSing: means for generating horizontal and vertical sync signals; means for generating a vertical train of square pulses; means for generating a horizontal train of square pulses; a first ''''hitting'''' symbol generator; a second ''''hitting'''' symbol generator; a ''''hit'''' symbol generator; means for applying said vertical and horizontal trains of square pulses to said symbol generators; means for generating first and second control signals for said first ''''hitting'''' symbol generator; means for coupling said first and second control signals to said first ''''hitting'''' symbol generator; means for generating third and fourth control signals for said second ''''hitting'''' symbol generator; means for coupling said third and fourth control signals to said second ''''hitting'''' symbol generator; means for generating fifth and sixth control signals for said ''''hit'''' symbol generator; means for coupling said fifth and sixth control signals to said ''''hit'''' symbol generator; means for coupling said first, second, third and fourth control signals to said means for generating fifth and sixth control signals; and means for coupling the outputs of said symbol generators and said sync signals to a television receiver.

6. Apparatus for generating symbols on the screen of a television receiver to be manipulated by at least one participant, comprising: means for generating a ''''hitting'''' symbol; means for generating a movable ''''hit'''' symbol; means for generating a fixed ''''hit'''' symbol; means for denoting coincidence between said movable ''''hit'''' symbol and said first ''''hit'''' symbol; means for causing said movable ''''hit'''' symbol to move away from said fixed ''''hit'''' symbol when coincident therewith; and means for coupling said generated symbols to a television receiver.

7. Apparatus for playing handball type games by displaying and manipulating symbols on the screen of a cathode ray tube, comprising: means for generating a first ''''hitting'''' dot; means for generating a ''''second'''' hitting dot; means for generating a ''''hit'''' dot; means for generating a wall symbol; means for changing the vertical position of said first ''''hitting'''' dot; means for changing the vertical position of said second ''''hitting'''' dot; means for causing said hit dot to move off-screen away from said wall dot when coincidence is not made between eight of said ''''hitting'''' dots and said ''''hit'''' dot; means for changing said off-screen position; means for denoting coincidence between said first ''''hitting'''' dot and said ''''hit'''' dot; means for denoting coincidence between said second ''''hitting'''' dot and said ''''hit'''' dot; means for causing said ''''hit'''' dot to change horizontal direction upon coincidence between said ''''hit'''' dot and either of said ''''hitting'''' dots; means for denoting coincidence between said ''''hit'''' dot and said wall symbol; means for causing said ''''hit'''' dot to change horizontal direction upon coincidence between said ''''hit'''' dot and said wall symbol; and means for displaying said dots upon the screen of said cathode ray tube.

8. Apparatus for playing a target shooting game on the screen of a cathode ray tube, comprising: means for generating a target on the screen of said cathode ray tube; means responsive to said target displayed on said cathode ray tube for ''''shooting'''' at said target; means for causing said target to move in a predetermined direction; means for causing said target to reverse direction upon hitting of said target by said means responsive; means for causing said target to go off-screen when not hit by said means responsive during a traverse across the screen.

9. Apparatus as defined in claim 8, wherein said Means responsive includes a photosensitive element and means for biasing said photosensitive element.

10. Apparatus as defined in claim 9, wherein said biasing means includes a lamp.

11. Apparatus for playing a target shooting game on the screen of a cathode ray tube, comprising: means for generating a target on the screen of said cathode ray tube; means responsive to said target displayed on said cathode ray tube for ''''shooting'''' at said target from a distance, including a biased photosensitive element; and means for causing said target to disappear when a hit is made.

12. Apparatus as defined in claim 11, wherein said photosensitive element is biased by a lamp.