JPH085981A - Projection display device provided with light control function - Google Patents

Abstract

PURPOSE:To realize strongly appealing display in the case of attaining a big hit in a game machine by changing the light quantity of a light source by controlling it according to a light control signal outputted from a driving circuit. CONSTITUTION:A light transmission type screen 5 is arranged nearly in the center of a nailed surface 1 and an image is projected to the screen 5 from the back. The image is reflected by a transmission type liquid crystal display panel 6, and enlarged and projected to the screen 5 by a lens 7. Then, light from a light source lamp 8 is cast to the panel 6 through a heat absorbing filter 9, condensed by the lens 7 and projected to the screen 5. Furthermore, a control signal output terminal 11A outputting the control signal in a big hit state is provided in the driving circuit 11 and gives the control signal to a light control device 15 so as to increase power supply voltage applied to the lamp 8, whereby control that the emitted light quantity of the lamp 8 is increased is performed. Thus, the big hit state is expressed with strong appeal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display device with a light control function which can be used in a game machine such as a pachinko machine or a smart ball.

[0002]

2. Description of the Related Art Conventionally, a game machine such as a pachinko machine is equipped with a liquid crystal display panel with a back light, and when an effective ball comes out, the effective ball is moved by, for example, rapidly moving the displayed pattern. Is displayed to make the game interesting and enhance the game.

[0003]

Conventionally, even if an effective ball comes out or a big hit etc. comes out, there is a drawback that the displayed pattern merely moves in a busy manner and lacks power. An object of the present invention is to provide a projection display device with a light control function, which is capable of performing a powerful display when a big hit or the like occurs in a game machine or the like.

[0004]

According to the present invention, there is provided a transmissive liquid crystal display panel, a light source lamp for giving light to the transmissive liquid crystal display panel, and a lens for enlarging and projecting light transmitted through the transmissive liquid crystal display panel onto a screen. , A projection display device with a dimming function is configured by a drive circuit that gives an image signal to a transmissive liquid crystal display panel and a dimming device that is controlled by a dimming control signal output from the drive circuit to change the light amount of a light source. It was done.

According to the structure of the present invention, in a game machine such as a pachinko machine, when a big hit or the like occurs, a control signal for moving an image is given to the drive circuit. A dimming control signal is generated by this control signal, the dimming control signal is controlled by this dimming control signal, the light amount of the light source is doubled, for example, and the illuminance is increased in addition to the movement of the image to increase the power.

[0006]

FIG. 1 shows an embodiment of the present invention. In this example, the projection display device with a light control function according to the present invention is applied to a pachinko machine. In the figure, 1 is the nail striking surface of the pachinko machine,
2 shows the glass stretched on the front surface. The ball 3 falls along the nail striking surface 1 and enters the pocket 4 to become an effective ball.

A light-transmissive screen 5 is arranged almost at the center of the nail striking surface 1, and an image is projected on the screen 5 from behind. The image is displayed on the transmissive liquid crystal display panel 6, and is enlarged and projected on the screen 5 by the lens 7. Reference numeral 8 represents a light source lamp. The light from the light source lamp 8 is applied to the transmissive liquid crystal display panel 6 through, for example, the heat ray absorption filter 9, and the light is condensed by the lens 7 and projected on the screen 5.

The transmissive liquid crystal display panel 6 receives an image signal from the drive circuit 11 and displays a multi-digit number or pattern as shown in FIG. 2, for example. For example, the multi-digit number of the image projected on the screen 5 is, for example, the effective ball detection switches 13A, 13B, 13C ... 13N provided in the path of the effective ball.
The controller 12 controls the number of any one digit to change according to the position of the pocket 4 in which the effective ball is inserted each time the effective ball is turned on and off.

When the numbers displayed on the screen 5 are aligned with, for example, "7, 7, 7", it is a big hit state. When a big hit occurs, the drive circuit 11 changes the image to be given to the transmissive liquid crystal display panel 6, in this example, each digit at high speed to display to the user that it is a big hit. conventionally,
This change in display shows that it is a big hit,
In the present invention, in addition to the operation of changing the display state at a high speed, the light amount of the light source lamp 8 is increased to enhance the power. For this reason, in the present invention, a light control device 15 is provided between the lamp power supply 14 for turning on the light source lamp 8 and the light source lamp 8, and the light control device 15 multiplies the light amount of the light source lamp 8 in the big hit state. Control.

In this embodiment, the drive circuit 11 is provided with a control signal output terminal 11A for outputting a control signal TK of "1" logic in a big hit state, and this control signal is given to the light control device 15 and the light source lamp 8. The control is performed to increase the power supply voltage being applied and increase the light emission amount of the light source lamp 8. FIG.
An example of the light control device 15 is shown in FIG. In this example, a configuration is shown in which the effective angle of the current supplied to the light source lamp 8 is controlled to increase or decrease by controlling the flow angle of the alternating current. Dimmer 15
Is a series circuit composed of a triac TR1 connected in series between the lamp power source 14 and the lamp light source 8, a capacitor C and resistors R1 and R2 connected in parallel to the triac TR1, and a capacitor C and a resistor of this series circuit. Bowl R2
It can be constituted by a control triac TR2 connected between a connection point of and the gate electrode of the triac TR1, and an electronic switch SW such as an FET connected in parallel with the resistor R1.

In the normal state, the electronic switch SW is maintained in the off state. As a result, the resistors R1 and R2 are connected to the capacitor C in series. In this state, the control triac TR2 is triggered to be turned on near the peak point of the AC voltage, and triggers the main triac TR1. Therefore, a current flows in the shaded portion in FIG. 4A, and this current is given to the light source lamp 8, and the light source lamp 8 emits light with a normal light amount of about 1/2.

When the drive circuit 11 is controlled to the jackpot state, the control signal output terminal 11A outputs the control signal TK of "1" logic. This control signal TK is given to the electronic switch SW provided in the dimmer 15, and when this electronic switch SW is controlled to the ON state, the series circuit composed of R1, R2 and C is composed of the capacitor C and the resistor R2. Since it changes into a series circuit and the current flowing therethrough increases, the control triac TR2 is controlled to be in the on state in the initial state of the rising of the alternating current. As a result, the main triac TR1 is also controlled to be in the ON state at the initial point of the rising of the alternating current, and the current flows in the shaded portion in FIG. 4B, and this current is given to the light source lamp 8. In this state, current is applied to the light source lamp 8 over almost the entire period of the alternating current, so that the light source lamp 8 emits a regular amount of light and illuminates brighter than in the state of FIG. 4A. Therefore, since the screen 5 shines brightly in the big hit state, it is possible to display the big hit state with power. The drive circuit 1
The control signal TK output from 1 is automatically returned to "0" in about 10 to 20 seconds, for example.

FIG. 5 shows another embodiment of the present invention. In this example, a case is shown in which the light control device 15 is configured by the stabilized DC power supply circuit 15A. An electronic switch SW is connected in parallel with the resistor R3 in the resistors R3, R4, and R5 that compose the voltage detection circuit 15B of the DC stabilized power supply circuit 15A, and the electronic switch SW is output from the drive circuit 11 and adjusted. The case where the configuration is such that on / off control is performed by the light control signal TK is shown.

In this case, the resistor R3 is released from the short-circuited state by the electronic switch SW by controlling the electronic switch SW to the off state by the control signal TK in the big hit state. In this state, the voltage detection circuit 15B
Detection voltage Va supplied from the DC stabilized power supply circuit 15A from the
Is lowered by an amount corresponding to the voltage drop when the resistor R3 is short-circuited. Since the output voltage of the stabilized DC power supply circuit 15A rises by the feedback control operation due to the fall of the detection voltage Va, the light emission amount of the light source lamp 8 can be raised.

FIG. 6 shows another embodiment of the present invention. In this embodiment, a rectangular wave oscillating circuit 16 such as a multivibrator is provided in the passage of the control signal TK supplied from the drive circuit 11 to the dimmer 15, and when the control signal TK is inverted to "1" logic, this rectangular wave oscillation is generated. The circuit 16 is oscillated, the oscillation signal is given to the dimmer 15, and the electronic switch SW shown in FIGS. 3 and 5 is turned on and off at a cycle of, for example, about 1 to 3 Hz.

As described above, by periodically turning on and off the electronic switch SW, the light source lamp 8 repeatedly blinks in a big hit state, so that a more powerful display state can be obtained.

[0017]

As described above, according to the present invention, the amount of light of the image projected on the screen 5 is increased or the amount of light is periodically changed when a big hit occurs during the game. , It is possible to express the state of a big hit with power. Therefore, there is an advantage that the game property can be improved. It should be easily understood that the present invention can be applied to other game machines besides the pachinko machine.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a front view for explaining an example of a display used in the embodiment shown in FIG.

FIG. 3 is a connection diagram for explaining the internal configuration of the light control device used in the embodiment shown in FIG.

FIG. 4 is a waveform diagram for explaining the operation of the light control device shown in FIG.

FIG. 5 is a connection diagram showing another embodiment of the light control device.

FIG. 6 is a diagram for explaining a modified embodiment of the present invention.

[Explanation of symbols]

 1 nail striking surface 2 glass 3 ball 4 pocket 5 screen 6 transmissive liquid crystal display panel 7 lens 8 light source lamp 9 heat ray absorption filter 11 drive circuit 12 controller 13A to 13N effective ball detection switch 14 lamp power supply 15 dimmer 16 square wave oscillation circuit

Claims (2)

[Claims] 1. A. A transmissive liquid crystal display panel, and B. A light source that gives light to the transmissive liquid crystal display panel; A lens for enlarging and projecting the light transmitted through the transmissive liquid crystal display panel onto a screen, and D. A drive circuit for applying an image signal to the transmissive liquid crystal display panel, and E. A projection display device with a dimming function, which is configured by a dimming device which is controlled by a dimming control signal output from the drive circuit to change the light amount of a light source lamp. 2. The dimming control signal according to claim 1 is applied to a rectangular wave generating circuit, the control signal applied to the dimming device is a rectangular wave, and the light emission amount of the light source lamp is periodically changed. A projection display device with a light control function.