JP3370054B2 - Liquid crystal display for gaming machines - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid crystal display device for a game machine. More specifically, the present invention relates to a display device having an improved heat dissipation structure for a liquid crystal display device for gaming machines.

[0002]

2. Description of the Related Art A liquid crystal display device is used as a display device of a portable personal computer. Or, even in the devices and equipments in which the CRT display has been used in the past, liquid crystal display devices are often used because of their features such as harmony with other equipments, small size, and small depth dimension. In addition, even in gaming machines, it has become common to use a liquid crystal display device in a game in order to improve the taste and change the fun.

[0003]

However, the liquid crystal display device in the game machine is different from the environment such as the display device of the personal computer or the liquid crystal display device used in place of the CRT display device in the equipment or device. Used below. In the latter, at least the display surface of the liquid crystal display element is in contact with the human living environment space, but in the former, it faces the space closed by glass. That is, the display surface of the liquid crystal display device used in the game machine does not directly contact the human living environment space. This causes different effects on the surface temperature of the liquid crystal display element. The influence is mainly the temperature rise of the entire liquid crystal display device. On the contrary, it can be said that it is an environment that does not cause uneven brightness in terms of maintaining the temperature uniformity of the entire liquid crystal display element due to the heat retention effect. On the other hand, in the specifications of a general liquid crystal display device, a general one has an ambient temperature range of 0 to 50 ° C. Liquid crystal display devices used in amusement machines, particularly liquid crystal display devices used in pachinko machines, are in a special environment, and general ones can be said to be in an environment in which this upper limit is easily exceeded. For this reason,
In Japanese Unexamined Patent Publication No. 8-98930, a hole for heat dissipation is formed on the back surface of the liquid crystal display device including the light source. JP-A-5
In JP-A-237233, a detachable backlight light source using a fluorescent tube having a substantially U-shaped light emitting portion on the back surface of a liquid crystal display element, a substrate for driving these, and a microcomputer interface 61 and LCD control are disclosed. A technique having a substrate 58 on which a microcomputer for use in a computer 92 is mounted is disclosed. However, in the former case, heat transfer due to convection of air is not taken into consideration, and in the latter case, although the peripheral condition in the embodiment of the present invention is similar, heat generation in the backlight and the control board is shown. It cannot be seen that any countermeasures or heat dissipation measures are taken into consideration.

The ambient temperature in the general specifications of the liquid crystal display device is 0 ° C. to 50 ° C. In particular, the power consumption of the peripheral circuits of the liquid crystal display device is increasing along with the highly functional display contents in recent years. Is becoming. Particularly, the operating temperature range of the liquid crystal display element is extremely lower than the permissible value of the ambient temperature of general electric components, and the maximum temperature is extremely low.
As disclosed in Japanese Patent Application Laid-Open No. 0 or Japanese Patent Application Laid-Open No. 5-237233, there is also a temperature disadvantageous constraint that it must be housed in a transparent unit case to prevent fraud. In order to prevent uneven brightness in the liquid crystal display, it is necessary to make the temperature of the display surface of the liquid crystal display uniform.

As described above, an object of the present invention is to provide a display surface of a liquid crystal display element in a game machine having many restrictions even when the display surface of the liquid crystal display element is mounted on a game machine which does not directly contact the outside world. It is to provide a means for keeping the temperature of 50 ° C. or less within the specification range. More specifically, it is an object of the present invention to provide an improved structure for dissipating heat from a circuit board that is disposed close to a liquid crystal display element and is also a heat source.

[0006]

In order to achieve the above object, the invention according to claim 1 is a liquid crystal display device for a gaming machine arranged on a game board, and at least a liquid crystal display element and a backlight portion are provided. A rectangular parallelepiped image panel unit that includes
Attach the back panel of the image panel unit near the four corners
And a liquid crystal display that accepts a command from the outside, and an image panel unit that includes a back plate made of an aluminum material that forms a mounting part for use and can be mounted through the mounting part and has a heat dissipation hole for heat dissipation. An image control board for generating an image to be displayed on a device, the size being mountable via the mounting portion.
The image control board and the back plate and a gap are provided in parallel.
The placed the image control board, together with the back plate a Luque over scan be enclosed for non <br/> positive prevention, the game board
Air circulation holes for heat dissipation are provided in the upper and lower parts when arranged , and at least the image control board is provided.
And a case of using a transparent member on a surface of the counter, the, respectively its Re <br/> in forming integrally, the image control and the rear plate
Within the space defined between the two planes containing the boards
In addition, a part of the air circulation hole of the case is arranged . Further, the invention according to claim 2 is the liquid crystal display device for gaming machine according to claim 1,
The rear plate of the image panel unit is formed in a flat plate shape, has a perforated portion for coupling with the image panel unit, and has a contact portion that contacts the rear plate and an extension that extends from the contact portion. having a surface, further comprising a second member having an air flow hole for radiating heat to the extension plane, said Ke
The base and the second member are coupled to the image panel unit through the perforated portion of the back plate, and the case , the extension of the second member, and the back plate form the image control board. It is characterized in that it is configured to surround the surroundings. Further, the invention according to claim 3 is the liquid crystal display device for gaming machine according to claim 1,
The back plate and the second member are made of an aluminum material, and the second member has the image panel unit mounted on a gaming machine.
It is characterized in that disposed on the upper surface portion and lower surface portion at the time of the.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a display device 20 according to an embodiment of the present invention.
2 is an exploded perspective view of FIG. However, the screws are omitted.
Reference numeral 205 in the figure denotes an image panel unit that internally includes a liquid crystal display element, a backlight, and a drive circuit that drives the liquid crystal display element and the backlight. In the figure, the display surface of the liquid crystal corresponds to the lower surface, and the front surface corresponds to the lower portion when the display surface is arranged vertically. Therefore, the upper surface of the figure is a surface corresponding to the rear surface of the image panel unit, and the rear plate 23
3 is attached to the image panel unit 20 via the mounting portion 213.
5 has a structure to be fixed to the back surface of No. 5. The back plate 233 is made of an aluminum material. Figure 2
Shows the assembled state of the respective members shown in FIG. In FIG. 2, the notch on the upper right side of the transparent case is the opening, and the part corresponding to the bottom of the cube is open, and when assembled, the image control board is on the bottom. The upper surface of the board 204 is located, and the connector arranged here is the case 2
It will be exposed to the outside of 02. The transparent case 202 is made of acrylic resin, and the upper surface in the figure has a uniform thickness and a mirror finish so that the substrate 204 inside can be visually observed from the outside. Naturally, acrylic has a low thermal conductivity, which is usually 1 / 100th that of aluminum.
It is about 100.

In FIG. 1, reference numeral 202 denotes a case formed of a transparent member, which has a shape surrounding the illustrated image control board 204 in order to protect the internal board from tampering prevention. However, the connector that receives signals and drive power from the CPU board that controls the external gaming machine is open, and the connector at the end of the cable extended from the outside in the assembled state should be connected to the connector on the board 204. This enables cable connection between the external board and the image control board 204. At the same time, the same applies to the power cable from the power supply section.

In FIG. 2, the notch on the upper right side of the transparent case is the opening, and the portion corresponding to the bottom of the cube is open. The upper surface of the board of the image control board 204 is positioned, and the connector arranged here is exposed to the outside of the case 202.

The transparent case 202 is made of an acrylic resin, and the upper surface in the figure has a uniform thickness and a mirror finish so that the substrate 204 inside can be visually observed from the outside. Naturally, acrylic has a low thermal conductivity, which is usually about 1/100 of that of aluminum.

Reference numeral 203 shown in FIG. 1 denotes a member for heat dissipation which is formed of an aluminum material and is attached to the image panel unit 205 by using the attaching portion 213 of the back plate 233 of the image panel unit. And the back plate 2
33 and the member 203 (hereinafter, referred to as a heat radiating plate) are made of the same aluminum material, and the contact surface including the mounting portion conducts the heat of the rear plate 233 and radiates the heat through the portion of the heat radiating plate 203 having the heat radiating hole. I have to.

The rear plate 233 of the image panel unit 205
At the bottom (in the figure) is a drive board, where there is an inverter power supply for driving the fluorescent tubes. In the diagram of the image panel 205 in FIG. 1, a liquid crystal display element including a polarizing plate, a glass substrate, a color filter, a liquid crystal plate and the like is provided on the lowermost surface, and a light guide plate type backlight unit is provided above the liquid crystal display element. A substrate containing an inverter for driving a fluorescent tube of the backlight and the like is arranged above the backlight unit. The presence of the back plate 203 is utilized to prevent mutual interference of heat and EMI (electromagnetic interference) between this substrate and the image control substrate 204 and to conduct heat to the heat sink 203. The back plate 203 is included and assembled as shown in FIG.

In FIG. 2, the transparent case 202 is shown.
Part of the image control board that can be seen through it is drawn in the part. Compare this side with the transparent case shown in FIG. However, since the heat dissipation plate 203 is made of an aluminum material, the image control board cannot be seen in that part.

FIG. 3 is a sectional view of the display device 201 of FIG. 2 as viewed from the right side. However, it is a diagram for explanation,
2 does not show the case of cutting in one uniform plane. When the display device 202 is mounted on a game machine, the right side of FIG. 3 is located at the top and the left side is located at the bottom. The drawings shown on the left and right of FIG. 3 further show the transparent case at the upper part of FIG. 3, showing a state of a cut surface passing through the center extending from the lower left side to the upper right side of FIG. The inside of FIG. 3 shows how the image control board 204 and the transparent case 202 are attached, and
The parts (connectors) shown in the center of the figure are a connector for connecting to an external board and a connector for receiving power supply from the power supply section. This is illustrated in FIG. Also,
The projecting portion toward the outside in the lower portion of the heat dissipation plate 203 shown in FIG. 3 indicates a cut surface of the left and right side surfaces in FIG. The heat radiating portion of the heat radiating plate 203 (the portion having the heat radiating hole) corresponds to the shape of the transparent case 202, and that portion is inserted into the groove 207 formed in the corresponding portion of the transparent case as shown in FIG. It is fixed. Further, as shown in FIG. 3, the transparent case 202 and the image control board 204 are the rear plate attachment portion 21 of the image panel unit 205 shown in FIG.
3, the mounting members 251 and 25 as shown in FIG.
It is linked using 2. A gap 208 is formed between the rear plate 233 and the image control board 204 as shown in the figure.
And the transparent case 202 and the heat dissipation plate 20.
As shown by the arrow in the figure, outside air is taken in through the heat dissipation hole 3 from the left side, passes through the gap 208 and the space on the component surface side of the image control board 204, and the upper side of the right side of the figure. It is designed to form natural convection discharged from the heat radiation port. At the same time, the air flow from the left side flows into the inside of the image panel unit 205 through the heat dissipation holes of the rear plate 233 shown in FIG. 1, and flows out through the connector outlet for connection or the opening for adjustment. , Fig. 3
Is discharged to the outside from the heat dissipation hole of the left heat dissipation plate 203.

The reason why the heat dissipation plate 203 and the back plate 233 for heat dissipation are made of aluminum is as follows. The thermal conductivity of aluminum is about three times that of iron, and aluminum reflects light, electromagnetic waves, and various heat rays well, and the higher the purity of aluminum, the better this property is. Aluminum with a purity of 99.8% or more is It is said to reflect 90% or more of the radiant energy. Therefore,
In order to shield each circuit and substrate from each other in order to prevent EMI and unfavorable heat transfer, at the same time, efficiently dissipate the internal heat to the outside by using convection air or through a heat conducting member. The use of as a component produces favorable results. In the present embodiment, since it is configured as described above, heat is not transmitted to the liquid crystal display element having a maximum operating temperature that is too low in a general electronic component whose operating ambient temperature is 50 ° C. The heat generation and the heat generation of the driving substrate can be released to the outside, and at the same time, mutual influences can be blocked, and the surface temperature of the liquid crystal display element can be kept within the specified temperature range.

In the present embodiment, although not shown, the heat generated by the fluorescent tube inside the image panel unit is effectively transmitted to the rear plate 233 at the position where the horizontal portion of the heat dissipation plate 203 shown in FIG. 1 contacts. is doing. At the same time, a light guide plate type backlight is also used in the image panel unit 205, and the back surface of the light guide plate is covered with a reflector made of aluminum.

Although the present invention has been described above using the present embodiment, it is easy to change to the following modes without departing from the gist of the present invention. 1. The heat sink 203 and the rear plate 233 of the image panel unit
Although it is a separate member, it is easy to configure it as a collective member. In the embodiment, it is premised that the image panel unit having the back plate 233 shown in FIG. 2. Further, the image control board is sandwiched by the heat sink 203,
Although they are coupled to each other by using the fixed portion of the rear panel of the image panel unit, in FIG. 1, the portion of the heat dissipation plate 203 that engages with the fixed portion of the rear panel of the image panel unit is extended and bent upward. Further, it is also easy to bend the end portion horizontally to form a U-shape or a staircase shape, and to provide a mounting portion at that portion. Then, the image control board is attached using that portion, and the protruding portion of the heat sink is fixed to the attaching portion of the game board, so that the connecting portion between the heat sink and the image panel unit is based on the game board. Then, it is sufficient to have sufficient strength to support only the image panel unit. 3. It is also easy to arrange the heat dissipation plate 203 on the left and right sides of the mounting position in correspondence with the heat generation positions of the image panel unit and the substrate housed inside the transparent case, rather than arranging them on the upper and lower surfaces. In the embodiment, the temperature management of the liquid crystal display surface is emphasized, and the upper and lower surfaces are arranged in consideration of the heat generating portion of the backlight inside the image panel unit.
. 4. The image panel unit has been ordered from a manufacturer specializing in LCDs, and the casing other than the side surface of the image panel unit shown in FIG. 1 is made of a stainless steel material having low thermal conductivity, and the above-mentioned measures are taken. When the exterior material of the image panel unit is formed of aluminum, the temperature control of the liquid crystal display surface becomes easier. Therefore, when the structure of the display device of the present invention is adopted, it is possible to control the image with more advanced functions and performance. The graphic engine of can be adopted. 5. The display device using the image panel unit has been described as an example, but it is also effective for the relationship between other substrates and the case. In particular, when a heat sink is required, it is easy to provide a member corresponding to the heat sink 203 in this embodiment and make the member function as a part of the case.

[0019]

As described above, according to the present invention, in the liquid crystal display device in the gaming machine, the aluminum material is effectively used so that the heat radiation and the EMI and heat rays emitted from the respective substrates are blocked. , And a structure in which there is a gap between the rear surface of the image panel unit and the image control board,
A heat dissipation hole on the vertical extension of the gap when mounted
Since there is provided a part of, this to effectively perform the convection air
As a result, the image panel unit can be effectively radiated, and at the same time, the image control board can be effectively radiated. This suppresses the temperature rise inside the display device,
It is possible to effectively reduce the temperature of the display surface of the liquid crystal display element, and it is possible to keep the temperature of the display surface of the liquid crystal display element below a specified value even when it is arranged inside the game device.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a liquid crystal display device according to the present invention.

FIG. 2 is a perspective view showing a state where the respective members shown in FIG. 1 are assembled.

FIG. 3 is a view showing a cut surface viewed from a side surface of the assembled state shown in FIG.

[Explanation of symbols] 201 display device 202 transparent case 203 Heat sink 204 image control board 205 image panel unit 206 Heat sink holes on the back panel of the image panel 207 Transparent case groove 208 Gap 210 Transparent case protrusion 211 Heat sink protrusion 212 Mounting hole for heat sink to image panel 213 Rear panel mounting hole for image panel 251 Mounting member 252 mounting member 253 Notch

Continuation of the front page (56) Reference JP-A-6-121872 (JP, A) JP-A-5-237233 (JP, A) JP-A-11-231414 (JP, A) JP-A-6-110038 (JP , A) JP 10-96898 (JP, A) JP 60-20377 (JP, A) Actual flat 3-107983 (JP, U) Actual 63-18174 (JP, U) Actual flat 3-42185 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02F 1/1333 G02F 1/13

Claims (3)

(57) [Claims] 1. A liquid crystal display device for a game machine that is disposed on the game board, an image panel unit having a rectangular parallelepiped shape enclosing at least a liquid crystal display element and the backlight unit, the image path
The image panel unit is located near the four corners on the back of the panel unit.
A mounting portion for mounting the back plate of the knit is formed, and the mounting portion is formed.
Mounting possible via the Al having a heat radiation holes for radiating heat
An image panel unit that includes a backplate Mi member, an image control board for generating an image to be displayed on the liquid crystal display device accepts a command from the outside, the preparative
The image control board having a size that can be attached via the attachment part, and the image arranged in parallel with the back plate with a gap.
A control board, a Luque over scan to surround <br/> to prevent unauthorized together with the back plate, the upper portion of the case disposed on the game board
And an air circulation hole for heat dissipation in the lower part, and at least the surface facing the image control board is transparent.
And a case using member, the their respective upon integrally formed, the said backplate image
Space defined between two planes, each containing a control board
A liquid crystal display device for a game machine , wherein a part of the air circulation hole of the case is arranged therein . 2. The liquid crystal display device for gaming machine according to claim 1, wherein the back plate of the image panel unit is formed in a flat plate shape and has a perforated portion for coupling with the image panel unit. And a second member that has a contact portion that contacts the back plate and an extension surface that extends from the contact portion, and further has an air circulation hole for heat dissipation in the extension surface, the case and the the second member is coupled to the image panel unit through the perforated portion of the back plate, the cable
Scan, wherein the extended portion of the second member, and the rear plate and the liquid crystal display device for a game machine, characterized in that configured <br/> was to surround the periphery of the image control board. 3. The liquid crystal display device for gaming machine according to claim 1, wherein the back plate and the second member are made of an aluminum material, and the second member is the image panel unit which is mounted on the gaming machine.
The liquid crystal display device for a game machine, characterized in that disposed on the upper surface portion and lower surface portion at the time of the instrumentation.