Abstract:
An improved gaming machine having a touch screen applied to an outer face of a CRT display and a limited number of push-button actuators. Either the touch screen or the push-button actuators can be used for controlling play as well as selecting one of several games that can be played on the machine. By using a touch screen on the video display device, the player of the game of the machine can use either the touch screen or the push-button actuators to change the playable game elements, such as discarding and drawing new cards when playing poker. The touch screen and associated electronics are arranged and programmed so that multiple touch fields are defined on the surface of the screen, which, by manually touching, can be used for playing games, such as keno, which require more actuators than there are push buttons on the machine. The touch fields on the touch screen are identified by generating appropriately located instruction images on the CRT display, which are visible through the transparent touch screen. The touch screen is directly applied; e.g. bonded, to the CRT screen.

Description:
RELATED APPLICATION 
     This application is a continuation application of Ser. No. 07/918,964 filed Jul. 24, 1992 for a Gaming Machine and Method Using Touch Screen, now U.S. Pat. No. 5,951,397. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to improvements in electronic machines for playing games, such as poker, blackjack and the like, and more particularly, to an improved apparatus and method for electronically playing a gaming machine. 
     Electronic gaming machines have been known and used for a number of years. For the most part, such gaming machines are used for playing poker, blackjack, video slots and the like. Typically, these machines have a CRT display device which flashes and presents images of cards or other playable game elements for viewing by a player of the machine. 
     The player generally operates push-button actuators which include hold/deal buttons and deal/draw buttons if, for instance, the machine is a poker machine. Similar push buttons are provided for playing blackjack and video slots. 
     The electronic machines of the type mentioned are limited in the number of games that can be played with them; namely, poker, blackjack and video slots. Keno is generally not playable with such electronic gaming machines because keno requires too many push-button actuators for controlling the play of the game. For this reason, conventional electronic gaming machines are limited in use, and this presents a drawback when it is desired to place the machines in large casinos for maximum return. Ideally, video gaming machines should have versatility in the types and number of games that can be played with them. Thus, a need exists for improvement in gaming machines of this type to allow the machines to be able to play additional games, specifically keno, along with multiple versions of the game of poker, blackjack and video slots. The present invention satisfies this need. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to an improved gaming machine and method wherein a conventional push-button operated machine is modified by including on the outer face of a CRT display device of the machine a touch screen. The touch screen is appropriately wired so that the play of the game can be controlled with it or with the push-button actuators. 
     The machine is generally of the type well known in the gaming industry as the Players Edge Series, a group of machines each of which includes a CRT display device which presents images of the cards or playable game elements in such a way that the player of the machine can actuate push buttons to change the playable game elements so as to try to obtain an advantage over a reference hand, such as the hand of a dealer. Such machines are commercially available from International Game Technology, or IGT, of Reno, Nev. By adding a touch screen to the video display device of such machines, for example, the player can select either the touch screen or the push-button actuators to change the playable game elements such as discarding and drawing new cards. 
     The touch screen allows the machine to play not only multiple versions of poker, blackjack and video slots, but also keno. This was not possible with conventional video gaming machines; e.g. the Players Edge Series of IGT, because keno requires a large number of push-button actuators. Moreover, there is not enough room on conventional push-button machines for the many additional push buttons keno requires. In addition, if conventional video machines were fitted with enough push buttons to permit playing keno or similar games, the machine would resemble a computer keyboard, an undesirable feature inasmuch as the typical player has an aversion to keyboards for computers. 
     The touch screen thus allows a conventional video gaming machine, such as a Players Edge Series machine, to be used for playing games requiring many push buttons; e.g. keno, without increasing the number of push buttons carried by the machine and, thereby, without rendering it functionally or aesthetically less desirable. 
     With the touch screen, the player has the option of selecting one of several or many different games, and this can be done by way of the touch screen when the initial selection video comes up on the video display of the CRT display device. The push-button actuators and the touch screen are wired so that game selection is possible with one or the other. 
     Furthermore, by fitting a conventional video machine with a touch screen, one can accomplish what previously required at least two separate machines. There is only an added cost of approximately $500.00 for the touch screen, its functional integration (e.g. wiring) with the remainder of the machine, and the additional game software. In contrast, adding a second machine to permit keno play, for example, costs about $5,000.00 and roughly doubles the casino floor space requirements. Thus, the cost of separate poker and keno machines exceeds the added cost of a combination machine using a touch screen and the conventionally limited number of push-button actuators by a factor of about 10:1. In addition, there is the added, ongoing doubling of the floor space costs one necessarily encounters when using two conventional machines instead of the combination machine of the present invention. 
     To enhance the versatility of usefulness of the combination touch screen-push button machines of the present invention, they can be fitted with otherwise conventional coin acceptor slots, bill acceptors, debit/credit card reception systems and ticket printers. Ticket printers are especially suitable for the increasingly common lottery systems where machines are installed in public places, such as stores, restaurants or bars, and where the establishment owner pays the winnings on the basis of the tickets being printed by the machine. 
     A primary object of the present invention therefore is to provide an improved gaming machine and method of playing video gaming machines in which a touch screen is applied to the outer face of a CRT display device, which can be used instead of or in addition to push buttons for playing any one of a number of different games, including all types of poker games and/or keno, to thereby render the machine more versatile and more profitable over a long period of time. 
     Other objects of this invention will become apparent as the following specification progresses, reference being made to the accompanying drawing for an illustration of the invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a front elevational perspective view of a conventional housing for a gaming machine constructed in accordance with the present invention and having a CRT display device with a touch screen and a bank of push-button actuators for controlling the play of the game with the machine; 
     FIG. 2 is a side elevational view of the machine of FIG. 1; 
     FIG. 3 is a block diagram of the circuitry showing the CRT display device with a touch screen attached thereto and the circuitry in block diagram form for coupling the push-button actuators and the touch screen with the CRT display; and 
     FIG. 4 is an enlarged, fragmentary cross-section through a CRT screen to which a touch screen has been applied in accordance with the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The gaming machine of the present invention is broadly denoted by the numeral  10  and includes an outer housing  12  having a top door  14 , central opening  16  and a bottom door  18 . The housing is generally upright as shown in FIG.  1  and is adapted to be used to play a number of games, such as poker, blackjack and video slot machine. The machine includes a CRT display device  20  which is fitted with a touch screen  40 , described in greater detail below. The housing further has a limited number; e.g. eight, push buttons  24 . The touch screen is provided to enable play of games, such as keno, for example, which are not generally playable with the machine because keno needs many more push-button actuators that can be conveniently positioned on the machine. 
     The top door  14  can be opened to allow entry to a space in the machine  10  for mounting the required equipment, such as electronic circuitry, of the machine. The central opening  16  carries the CRT display device  20  on which images of cards and/or other indicia of games playable on the machine are displayed. 
     Near the lower margin of main opening  16 , a number of push buttons or push-button actuators  24  are mounted on a ledge  22  for access by the player of the machine. For poker there are typically five “hold/cancel” buttons (one for each card displayed on the screen), in some jurisdictions also referred to as “remove/recall” buttons, a deal/draw button, preferably on the right-hand side of the machine, a bet-one credit button, and a bet-maximum credit button, for a total of eight push buttons. 
     The lower door  18  typically carries advertising material and is preferably backlit with lights on the inside of the housing to make the machine more attractive and aesthetically appealing to would-be players. The machine may have a coin acceptor slot  30  into which the desired number of betting coins can be inserted before play commences and a coin receiving tray  28  for receiving coins ejected by the machine when a winning hand is displayed on the screen, the coins exiting the machine through a chute  26  for flow into the tray. Alternatively, the machine may dispense a printed ticket representing the player&#39;s winnings. 
     Ledge  22 , on which push buttons  24  are mounted, is conventionally located and designed to provide the player with maximum comfort and convenience. Thus, it is located relative to the player, who typically sits on an elevated chair in front of the machine, so that the player&#39;s forearm is only slightly upwardly inclined while his upper arm remains proximate the player&#39;s torso. In other words, the ledge is positioned in front of the player and not too high. Such a positioning of the ledge limits or prevents fatigue in the player&#39;s arm and therefore makes it possible for him to remain in the playing position for relatively long periods of time. For convenience of play, as well as for aesthetic reasons, there are only a limited number; e.g. eight, of push buttons on the ledge, which is sufficient for playing most casino games such as a variety of poker games, blackjack (21), video slot games (displaying images of rotating reels with a variety of symbols on the CRT screen), and similar games. 
     A machine with the foregoing features is conventional and can be obtained, for example, as a standard video poker machine from IGT of Reno, Nev. 
     To enhance the versatility of such a machine, the present invention applies a touch screen  40  to the front outer surface  42  of the CRT display device  20 . Touch screens are commercially available from a variety of sources. Briefly, a touch screen is a transparent; e.g. glass, panel which is curved and shaped to correspond to the curvature and shape of the CRT screen surface to which it is applied. One type of touch panel is fitted with a number of relatively short; e.g. one-inch or so in length, mostly linear, spaced-apart electrodes arranged in one to three spaced-apart, peripheral lines along the perimeter of the touch screen. Such commercially available touch screens are typically delivered with a controller board (not shown) which includes a touch screen processor, an A/D converter and other electronic components which are appropriately connected with the electrodes so that the location at which a person touches the screen can be sensed by the electrodes and a corresponding signal is generated which can be further processed. The signal can then be used to execute specific commands for playing a game. A message is generated by the CRT display beneath to inform the player of the command he sends if he touches the screen at that location. 
     In accordance with the present invention, touch screen  40  is secured to the outer CRT screen surface  42 . Preferably it is secured to the CRT screen with an adhesive or epoxy layer  44  applied between the CRT and the touch screen along their common peripheries as is illustrated in FIGS. 3 and 4. 
     The touch screen is transparent so that images displayed on the CRT screen are visible through it. 
     When the combination machine of the present invention is in use, any desired number of touch fields or soft switches  43  (only two such touch fields are illustrated in FIG. 1) are visible through the touch screen. The touch fields may include a variety of commands; e.g. for optionally increasing a bet, or for exercising play action options; e.g. selecting keno numbers. The touch screen electronics is programmed so that when a player touches a given field, the machine responds accordingly. For example, for playing keno, the touch fields displayed on the screen equal the number of keno numbers; e.g. 80, plus a number of touch fields; e.g. 5, for the requisite play commands. To play the game, the player touches the fields which correspond to the numbers he wishes to select. The touch screen electronics senses each touch and generates a corresponding signal which identifies the field, and therewith the “number” selected by the player. The signals are then fed to the electronics package of the gaming machine, which compares these “numbers” to the keno numbers randomly selected by the machine to determine whether the numbers selected by the player constitute a winning combination. If they do, the machine then conventionally ejects the winnings through chute  26  into tray  28  for collection by the player. If they do not, the play is over and a new play can commence. 
     To enhance the versatility of the machine, the touch screen electronics and the machine electronics are preferably programmed so that the touch screen can not only be used for playing a particular game; e.g. keno, but so that all games playable on the machine; that is, specifically those games which can be played with the limited number of push buttons  24 , can be optionally played on the touch screen. Further, the touch screen and the machine electronics are programmed so that before play commences, a player has the option of choosing a particular one of the multiple games that are playable on the machine. For this purpose, when the machine is in its standby or attract mode, the CRT screen will display in appropriate touch fields which games are playable on the machine. The player will therefore first select one of the games by touching the appropriate touch field on the screen. The machine electronics then displays the game in question, including touch fields for playing the game. If the selected game is one which can be played on the limited number of push buttons provided on the machine, the player has the option of playing the game by depressing the appropriate buttons or touching the appropriate soft switches displayed on the screen, or a combination of both. Selecting one or the other mode of playing the game does not affect the actual game that is being played; it merely provides the player with the option of playing on the screen or with the buttons. Of course, games for which there are insufficient buttons on the machines can only be played on the touch screen. 
     When playing poker, the display of the cards on the CRT screen is typically relatively large. Normally, for playing poker, the touch screen is set up so that the entire image of each card can be touched for the poker hold/discard functions. This leaves relatively little room on the touch screen for the other required play commands. In such event, the machine electronics can be constructed and programmed so that even for playing poker on the touch screen, the deal/draw buttons  24  on machine ledge  22  can be used for this function. This reduces the number of play command touch fields on the touch screen. In such an arrangement, the two right-handmost push buttons  24  illustrated in FIG. 1 are preferably designated as the deal/draw push buttons. 
     FIG. 3, a schematic circuit diagram, shows that the CRT display device  20  is connected with push buttons  24  and touch screen  40  for controlling play of the machine with one or the other or both. CRT display device  20  is coupled by a lead  21  via an A/D converter (not shown) to a microprocessor  58  including a game program  62 . A lead  23  from push-button actuators  24  in machine ledge  22  and a lead  46  from touch screen  40  connect with microprocessor  58  for sending game playing commands to the latter. 
     The player of the machine now has the option of selecting one of several plays. For instance, he can select a play by way of touch screen  40  when the initial selection menu comes up on CRT device  20 . The push buttons  24  and microprocessor are preferably set up so that selection can be done with them as well. With the selected game; e.g. poker, the player has three options to play it. One is by touching the appropriate touch fields or soft switches  43  displayed on the CRT/touch screen. Another option is to manipulate push buttons  24 . The third is to use a combination of the push buttons and touch fields. 
     Typically, the player will play with the push buttons  24  all games which are playable with them because they are better liked by the average player. Reasons for this are that push-button play involves less arm fatigue as compared with playing on the touch screen, because the screen is relatively higher, requiring the player to raise his or her arm too high for playing the machine over extended periods of time. Further, most players find the electrostatic discharge feeling when touching panel  40  objectionable and/or uncomfortable. Still further, the glass of touch screen becomes easily smudged, which is accentuated by the back illumination of the screen  40 , which again will cause many players to select play with the push buttons rather than on the screen whenever this is feasible. 
     In spite of the expected preference of most players to play games with the push buttons whenever this is possible, the combination gaming machine of the present invention significantly enhances player appeal. Video gaming machine players frequently spend hours playing on video gaming machines, especially the most popular games such as poker, blackjack or video slots. These games can be played with the buttons, thereby minimizing or eliminating player fatigue because of the advantageous positioning of the buttons relative to the player. However, a player can quickly change over to other games, including games which could not heretofore be played on conventional push-button video gaming machines, such as keno, for example, by making the appropriate selection at the end of a play without having to leave the machine and finding one on which keno, for example, can be played. Such machine change interrupts the play rhythm, distracts the player&#39;s concentration and, not infrequently, causes the player to lose interest in play altogether, which is undesirable for casino operators, who prefer to have players spend as much time as possible at continuous play. The combination touch screen-push button machine of the present invention makes this possible and is, therefore, a machine of choice for both players and gaming operators.