JPH0748300Y2 - Display devices for pachinko machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a display device of a pachinko machine, and more particularly to a display device having a temperature compensation function for color display.

(Prior Art) Conventionally, when a specific winning opening is won in a pachinko machine, the design (numbers, letters, patterns, etc.) of the display device fluctuates, and when a specific combination is obtained at the time of stop, a big hit or Small hit (there is a hit state, there is a type of so-called fever type. The display device used in this type has a display panel incorporated inside and variably displays the above-mentioned symbols on the screen. Such a display panel is required to have low power consumption and be structurally compact, etc. Since the liquid crystal display is excellent in these points,
The number of cases where it is used for the display device of a pachinko machine is gradually increasing.

However, even with a liquid crystal display, the black and white display makes the pattern display too pale, so colorization is indispensable to increase the fun of the game. There is an example in which a translucent color panel is placed in front of a black and white display for easy colorization, but it is difficult to satisfy the vividness of the display. Therefore, recently, a display device using a liquid crystal color display is being developed.

(Problems to be solved by the invention) One of the problems in a liquid crystal color display is a temperature change in display color. That is, a certain type of liquid crystal has a well-known heat-sensitive effect, and has the property of changing its color from red to yellow, green, blue, and purple as the temperature rises. Therefore, it is necessary to perform temperature compensation,
In this case, the characteristic of the liquid crystal is such that the color changes in the same order as described above as the voltage increases. Specifically, when temperature compensation is performed, the temperature is usually detected by a temperature sensor, and the voltage applied to the liquid crystal is controlled based on the detected value. Can be kept in the color of.

However, it has been found that if the above temperature compensation method is applied to a pachinko machine as it is, a new problem occurs due to the circumstances peculiar to the pachinko machine. That is, when the display device is incorporated into the game board, the control circuit board of the liquid crystal panel including the temperature sensor is arranged on the back side of the liquid crystal panel, that is, on the back side of the game board, so that the position close to the liquid crystal panel is correct ( Where the temperature on the front side of the game board should be detected, the temperature on the back side of the game board is actually detected. The positional deviation from the regular detection position does not cause any trouble in the normal gaming state, but there is a problem that the color display changes to an unexpected color when the "hit state" is achieved.

In other words, when the "winning state" is reached, the various lamps start blinking all at once, and the various solenoids for driving accessories etc. are energized. Temperature rises rapidly. Therefore, a considerable temperature difference occurs between the back surface side and the front surface side of the game board during the "hit state". Therefore, the temperature sensor actually detects a temperature higher than the temperature in the vicinity of the liquid crystal panel that should be detected. As a result, the voltage supplied to the liquid crystal panel deviates from the original control value, and the panel displays a color different from the color originally to be displayed.

In view of these points, the applicant filed a utility model registration application as of February 13, 1990 regarding a technique in which the temperature sensor is covered with a cap to make the response of the sensor dull. However, this was significant in that the problem could be solved by simple means, but the temperature sensor itself was not rearranged at all, but was placed at a position directly exposed to the atmosphere on the back of the game board. If the display device has a different structure, etc., if it is exposed to a high ambient temperature due to the "hit condition", it may end up in the "hit condition" even if the cap is put on. In some cases, the temperature may be higher than that near the liquid crystal panel. In such a case, even with this measure, the situation in which the color display is modulated at the end of the "hit state" cannot be effectively resolved.

Therefore, the present invention has an object to provide a display device capable of effectively controlling the color change of liquid crystal.

(Means for Solving the Problems) In order to achieve the above object, the present invention relates to a display device mounted on a game board of a pachinko machine, a housing including a liquid crystal panel capable of color display, and the housing. A control board having a predetermined space between it and a rear surface of the control board and a circuit for driving the liquid crystal panel, and a temperature compensation for color display of the liquid crystal panel mounted on the rear surface of the housing. The temperature sensor and the cover body sandwiched between the control board and the housing while enclosing the temperature sensor are provided.

(Operation) Therefore, the temperature sensor is arranged at a position near the liquid crystal panel on the back surface of the housing and can detect a temperature close to the ambient temperature near the liquid crystal panel. In addition, the temperature sensor is arranged under the control board so as to be covered therewith and is surrounded by the cover body, so that the temperature sensor is not directly exposed to the atmosphere on the back side of the game board. Therefore, even if the backside temperature of the game board suddenly rises, it does not detect the temperature change sensitively, and is relatively unaffected by the temperature change on the backside of the game board over time. The temperature can be detected. As a result, erroneous temperature compensation due to a temporary temperature difference between the vicinity of the liquid crystal panel and the back surface of the game board is not performed, so that the color display of the liquid crystal panel is maintained in a predetermined color.

(Embodiment) An embodiment embodying the present invention will be described in detail below with reference to the drawings.

First, a pachinko machine equipped with a display device will be described with reference to FIG. Various winning openings are arranged on the game board 1, and ac of them are start openings for starting the fluctuation of the symbols on the display device 2. In this example pachinko machine,
When a symbol (for example, a three-digit number) that is variably displayed on the display device 2 along with a winning in any of the starting openings a to c is stopped after a certain period of time, a specific combination (for example, “7”) Is 3
In the case of "matching", the "winning state" is established, and the special winning opening 3 arranged below the display device 2
Is set to open for a certain period of time.

The display device 2 arranged substantially in the center of the game board 1 has a casing 4 as shown in FIG. 2, and the casing 4 is fitted into a mounting hole 5 opening in the game board 1 and fixed by screws or the like. ing. A transparent screen plate 6 is attached to the front opening of the casing 4,
The symbol shown on the liquid crystal panel 8 described later is transparently displayed. Further, a full-color type liquid crystal display unit U including a liquid crystal panel 8 in the casing 4
Is incorporated.

The liquid crystal display unit U includes a metal housing 7 that houses the liquid crystal panel 8 and the backlight light source 9, a control board 15, and a protective case 16 that is screwed to the rear side of the housing 7. The protective case 16 is fixed as a whole by fixing the protective case 16 to the rear opening of the casing 4 with screws, but the mounting positions are set on both the left and right sides of the casing 4, so that it is not shown in FIG. Not represented.

The liquid crystal panel 8 is arranged corresponding to the front opening of the housing 7. When the structure is simplified and shown in FIG.
The liquid crystal 12 is enclosed by the two glass substrates 10 and 11 to form a TN liquid crystal cell. And
Transparent electrodes (striped electrodes) 13 and 14 are wired on the inner surfaces of both glass substrates 10 and 11, and one electrode is wired as an X electrode and the other is wired as a Y electrode in a matrix form. Form a display pixel. In addition, inside the liquid crystal cell, a fine color filter 30 of three primary colors of red, green, and blue is attached to each pixel, and full color display is achieved by a so-called additive color mixing method in which these color components are visually mixed. It is done.

The control board 15 is arranged behind the rear wall 7a of the housing 7, and is attached by clips 32 provided at the respective corners so that a certain distance is maintained. The wiring between the liquid crystal drive circuit 17 (the circuit structure is not shown) provided on the control board 15 and the electrodes 13 and 14 of the glass substrates 10 and 11 of the liquid crystal cell is connected to the back wall of the housing 7. It is performed through a small hole (not shown in detail) of 7a.

The liquid crystal drive circuit 17 is connected to a control device 19 (see FIG. 5) composed of a microcomputer described later. The circuit 17 plays a role of controlling lighting / non-lighting of each pixel and the magnitude of the applied voltage according to an analog RGB signal from the control device 19 (specifically, from the video signal generation circuit 27). It should be noted that the driving method of the liquid crystal panel 8 is to apply a sequential scanning pulse to the X electrode, which is well known, and then perform Y scanning according to the display pattern of the line.
The method is to apply signal voltage pulses all at once from the electrodes.

A backlight light source 9 that emits white light, for example, is arranged between the liquid crystal panel 8 and the control board 15 and is connected to a lighting circuit (not shown) on the control board 15.

The above-mentioned liquid crystal drive circuit 17 or a lighting circuit (not shown) is wired on the back side of the control board 15, and the liquid crystal drive circuit 17 among them includes a thermistor 18 as a temperature sensor. The thermistor 18 detects the ambient temperature in order to temperature-compensate the display color of the liquid crystal, and the liquid crystal drive circuit 17 adjusts the voltage applied to the liquid crystal cell based on the detection signal from the thermistor 18. This thermistor 18 is a liquid crystal drive circuit on the control board 15 via a lead wire 33.
It is connected to the wiring 17 and is introduced into the gap between the control board 15 and the rear wall 7a, and its heat-sensitive portion is directly adhered to almost the central portion of the rear wall 7a of the housing 7. Further, the thermistor 18 is wrapped in a cover body 34 made of sponge rubber. The cover body 34 is adhered to the back wall 7a side and pressed by the control board 15, whereby the thermistor 18 is held.

The protective case 16 protects the control board 15 from damage, and a large number of slits 21 are opened to radiate heat inside the unit U.

By the way, as is well known, a prize ball collecting protection cover plate 22 is provided on the back surface of the game board 1 (see FIG. 2), and a narrow space S (pachinko ball The depth is slightly longer than the diameter). The various lamps that blink in the "winning state" and the special winning opening solenoid 23 are stored inside the space S. The back side portion of the display device 2 is projected from a partly opened portion in the central portion of the winning ball collective protection cover plate 22 and is further covered with an outer cover 24 attached to the opening portion with screws or the like.
Therefore, the back side portion of the display device 2 communicates with the space S on the side of the winning ball collecting protection cover plate 22, and as a result, the back side of the control board 15 is exposed to the atmosphere in the space S.

Finally, the control device 19 will be described with reference to FIG. 5. The control device 19 is composed of a microcomputer, and although not shown, it is arranged at an appropriate position on the back surface of the pachinko machine to control the game contents. A winning detection switch 29 is connected to the input side of the waveform shaping circuit 28. On the other hand, on the output side, the analog RG output from the video signal generation circuit 27 based on the video RAM 26 in the control device 19 is output.
LCD drive circuit 17 operated by B signal, and the same circuit 17
A liquid crystal panel 8 whose display state is controlled by is connected.

Next, the operation of the display device of this example configured as described above will be specifically described.

When there is a winning ball in the starting ports a to c, the display of the liquid crystal panel 8 starts to change according to a command from the control device 19, and after a certain period of time, a predetermined symbol is stopped and displayed. During this time,
For the display of the liquid crystal panel 8, appropriate brightness and contrast are obtained by back irradiation from the backlight light source 9. At the same time, as described above, the liquid crystal drive circuit 17 displays a predetermined symbol on the liquid crystal panel 8 in full color based on a command from the control device 19. In this case, the liquid crystal drive circuit 17 adjusts the voltage applied to the liquid crystal panel 8 due to the resistance change of the thermistor 18 due to the change of the ambient temperature, so that the color display of the liquid crystal panel 8 is maintained at the set predetermined color. .

On the other hand, when the symbols displayed on the liquid crystal panel 8 are changed as a result of winning in one of the starting openings a to c, a predetermined combination (for example, when three "7" are arranged) is obtained. Becomes the above-mentioned "hit state", various lamps flash at once, and the special winning opening 3 and the like start operating. As a result, the lamp and the driving solenoid generate heat, so that the back side of the game board 1, that is, the winning ball collective protection cover plate 22.
The ambient temperature in the space S surrounded by the temperature rises. Since this space S is a narrow and almost closed space as described above, it is difficult to radiate heat to the outside, and the ambient temperature rises sharply. Therefore, a considerable temperature difference occurs between the vicinity of the liquid crystal panel 8 and the back side of the control board 15. In such a case, since the thermistor 18 is arranged on the lower surface side of the control board 15 and is covered and shielded by the cover body 34, the thermistor 18 is insulated from the ambient temperature in the space S described above. Has become. Therefore, the back wall of the housing 7
Thermistor 18 mounted in contact with 7a (made of metal)
Detects the temperature inside the housing 7, that is, the temperature relatively close to the ambient temperature around the liquid crystal panel 8.
That is, the thermistor 18 does not sensitively detect a rapid temperature rise in the space S due to the "hit state",
Further, even with the passage of time, the temperature, which is relatively close to the ambient temperature around the liquid crystal panel 8, is continuously detected without being influenced by the temperature in the space S. Therefore, the resistance value of the thermistor 18 substantially depends on the internal temperature of the housing 7 even if the "contact state" continues, so that the originally required voltage is applied to the liquid crystal panel 8. Therefore, it is possible to effectively avoid the modulation of the display color until the end of the “hit state”. For this reason, the player can continue to enjoy vivid color display even during the "hit state", and the fun of the game is not impaired.

Further, regarding the arrangement of the thermistor 18 in this example, only the lead wire 33 is extended from here and moved to the rear wall 7a, and even if it is attached, it is sandwiched between the control board 15 and the cover body 34. Since it is a simple method of just attaching, you can use the existing temperature compensation device almost as it is,
Moreover, there is an effect that the surrounding structure is hardly changed.

Although the thermistor is used as the temperature sensor in this example, it goes without saying that another temperature sensor may be used. Furthermore, the RGB signals output to the liquid crystal drive circuit 17 may be digital signals instead of analog signals. Furthermore, the cover body does not have to have the cushioning property as in this example as long as it can obtain an appropriate heat shielding property.

(Effects of the Invention) The effects of the present invention are as follows.

By rearranging the temperature sensor on the lower side of the control board and covering it with a cover, the atmosphere on the back side of the control board can be almost insulated, so the temperature sensor is controlled according to the "hit state". It is possible to detect a temperature close to that around the liquid crystal panel regardless of the rise in the ambient temperature on the back side of the substrate. Therefore, an unexpected change does not occur in the color display of the liquid crystal panel from the beginning to the end of the "hit state", so that it is possible to avoid a situation that spoils the fun of the game.

Compared with the conventional temperature compensator, the position of the temperature sensor and the points covered by the cover body are slightly changed, and a simple improvement is required.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the liquid crystal display unit as seen from the back side, and FIG. 2 is a cross-sectional view showing an assembled state of the display device,
FIG. 3 is a front view of a pachinko machine, FIG. 4 is a cross-sectional view of a liquid crystal panel, and FIG. 5 is a block diagram showing an electrical configuration of the pachinko machine. 1 …… Game board 2 …… Display device 8 …… Liquid crystal panel 18 …… Thermistor (temperature sensor) 19 …… Control device 34 …… Cover body

Claims (1)

[Scope of utility model registration request] 1. A display device mounted on a gaming board of a pachinko machine, wherein a housing having a liquid crystal panel capable of color display and a rear surface of the housing are arranged with a predetermined space therebetween. A control board in which a circuit for driving the liquid crystal panel is wired, a temperature sensor mounted on the back surface of the housing for temperature compensation for color display of the liquid crystal panel, and the control board in a state in which the temperature sensor is wrapped. A display device for a pachinko machine, comprising: a cover body sandwiched between the housing and the housing.