JP2005202301A - Electric display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric display device which has a high strength device case, and performs easy-to-see display in high contrast. <P>SOLUTION: A transparent plastic board 5 protecting a group of LEDs 15 of the electric display device is held from the front and the rear by a grid-shaped front board part 21 of the front side case part 2 and a grid-shaped presser board 6; a group of LEDs 15 forming one dot of display is arranged so as to be faced to each of openings 23, 61 formed in the front board part 21 and the presser board 6; and the front board part 21 is painted in black on the surface and is also provided with an eaves member 8 for shielding external light. The transparent plastic board 5 is surely held by the grid-shaped front board part 21 and the presser board 6 in the front and the rear, and the device case is also increased in strength. Since each LED group 15 is partitioned by a black-lacquered frame and the external light is shielded by the eaves member 8, easy-to-see characters and images are displayed in high contrast. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric display device that is installed on a street corner or the like and used for displaying various advertisements and promotional characters and images.

  The electroluminescent display device includes light emitters such as LEDs arranged vertically and horizontally or obliquely at a predetermined pitch, and is configured to display characters and images by selectively blinking each light emitter. FIG. 5 shows a generally used electro-optical display device. As shown in this figure, the electroluminescent display device 100 includes a light emitter substrate 102 in which light emitters 101 are arranged in a grid pattern on the front and back, and each of the light emitters 101 is covered with a transparent acrylic plate 103 (glass And a rectangular opening 104a formed on the front surface of the device case 104, and can be seen from the front. The transparent acrylic plate 103 is fixed from the back side thereof by a rectangular frame-shaped pressing member 105.

  Here, since the size of the available acrylic plate is determined, as shown in FIG. 5 (b), a method of joining the light emitting display devices 100 vertically and horizontally is used to configure a large light emitting display device. It has been adopted.

  However, the conventional electric display device has the following problems. First, since the large rectangular opening 104a is formed in the front portion of the device case 104, there is a problem that the strength of the device case 104 is insufficient and the fixing strength of the transparent acrylic plate 103 is insufficient. Furthermore, when an electric display device is installed outdoors, there is a problem that sunlight illuminates the front surface and displayed characters and images are difficult to see. Furthermore, if the heat generated in the light-emitting substrate 102 cannot be released efficiently, there is a problem in that a malfunction of a control circuit or the like mounted on the substrate or a decrease in durability is caused.

  On the other hand, as shown in FIG. 5B, when the light-emitting display device 100 is connected vertically and horizontally to form a large light-emitting display device, the joint portion 106 between the light-emitting display devices is the front portion of the device case 104. The outer peripheral frames 104b are joined to each other, resulting in the width of the case frame. As a result, there is a problem in that the arrangement interval of the light emitters is widened at the joint portion, the display characters and the display image are cut off at the joint portion, and the display quality of the characters and images is lowered.

  In view of these points, an object of the present invention is to propose an electro-optical display device that has a high device case strength, can securely fix an acrylic plate, and can display characters and images with high contrast. It is in.

  Another object of the present invention is to propose an electro-optical display device capable of producing a large electro-optical display device so that display characters and image breaks are not formed.

  Furthermore, an object of the present invention is to propose an electroluminescent display device having high heat dissipation performance.

In order to solve the above-described problems, an electroluminescent display device of the present invention includes:
A device case consisting of a front case part and a back case part;
A transparent plastic plate disposed on the back side of the front case part in the device case;
A holding plate disposed on the back side of the transparent plastic plate in the device case;
An LED board disposed on the back side of the pressing plate in the device case;
The front side case portion includes a front plate portion and an outer peripheral side plate portion that is bent rearward from the outer peripheral edge of the front plate portion. And
A rear opening is formed in the holding plate vertically and horizontally at regular intervals, each rear opening is opposed to each front opening of the front plate portion,
On the front surface of the LED substrate, light emitters or light emitter groups for forming one display dot are arranged at regular intervals vertically and horizontally, and each light emitter or each light emitter for forming one display dot is arranged. The group is characterized by facing each rear opening.

  In the electro-optical display device of the present invention, the front plate portion and the pressing plate arranged before and after the transparent plastic plate are lattice plates in which the openings are formed in a vertical or horizontal or matrix shape. Accordingly, the strength of these portions can be increased as compared with a conventional electro-optic display device in which a rectangular opening having a size substantially corresponding to the transparent plastic plate is formed. Further, the light emitters or light emitter groups forming one display dot are separated from each other by a frame having a certain width. By applying a black paint to the surface of the frame, the contrast of each display dot can be increased, so that characters and images are easy to see. In addition, letters and designs can be written on the opening frame portion of the front plate portion.

  In addition, if a gutter member is fixed between the front openings of each row on the front surface or back surface of the front plate portion or the back surface of the transparent plastic plate, external light such as sunlight can be blocked. And the image is easy to see, and the strength of the front case portion is also increased. In particular, when the eaves member is attached to the back side, it is preferable because the front side becomes flat and dust and the like are difficult to adhere.

  Next, in the present invention, it is preferable that the width dimension of the outer peripheral frame from the outer peripheral edge of the front plate portion to the outermost front opening is approximately ½ of the width of the frame partitioning each front opening. . In this case, when a large electro-optic display device is manufactured by connecting electro-optic display devices vertically and horizontally, the frame width of the joint portion of each electro-optic display device is the same as the frame width of each opening. Therefore, it is possible to manufacture a large-sized electric display device in which characters and images are not cut off at the joint portion.

  Next, when the transparent plastic plate is made of a material having an ultraviolet blocking function, it is preferable because deterioration of a light emitting body such as an LED can be prevented.

  On the other hand, when the light emitter substrate has a configuration in which a plurality of light emitter substrates are arranged vertically and horizontally, it is desirable to form a heat dissipation gap between the light emitter substrates.

  Further, it is desirable that the back side case portion has a rectangular shape, and vent holes for intake and exhaust are respectively formed at both end portions in one diagonal direction. In this case, one of the vents located above may be an exhaust port to which an exhaust fan is attached, and the other vent located below may be an intake port. In addition, when the electric display device having this configuration is used in a vertically placed state, the vent hole located on the upper side in the horizontally placed state is on the lower side, and the vent hole located on the upper side is on the upper side. By simply replacing the exhaust fan with the upper vent, it can be installed vertically.

  In the electro-optical display device of the present invention, both the front plate portion and the holding plate arranged before and after the transparent plastic plate protecting the light emitter are used as a lattice plate, and the light emitter or the light emitting element that forms one display dot on these. An opening corresponding to the body group is formed. Accordingly, an opening of a size corresponding to the transparent plastic plate is formed on the front surface, and the device case has a larger size than the conventional electric display device in which only the outer peripheral edge portion of the transparent plastic plate is fixed by a rectangular frame-shaped pressing member. The strength and the strength of the pressing portion of the transparent plastic can be increased. Moreover, the intensity | strength of the said front board part can be raised further by attaching a collar member to a front board part. Therefore, there is no practical problem even if the width of the outer peripheral frame of the front plate portion is reduced. For this reason, when the outer peripheral frame is narrowed to ½ of the opening frame and the light-emitting display device is connected vertically and horizontally, the dot interval can be made equal.

  Next, in the present invention, the surface of the front plate portion is painted black, and the frame of each opening is black. Therefore, there is an advantage that the contrast of each display dot is increased and display characters and images are easy to see. Moreover, when a gutter member is attached, since external light such as sunlight can be blocked, there is an advantage that display characters and images are easier to see.

  On the other hand, in the present invention, since the gap for heat dissipation is formed between the light emitter substrates, the heat generated inside can be efficiently released to the outside through these gaps. In addition, since the vents are formed at both end portions in the diagonal direction of the rectangular back side case portion, it is possible to deal with the case where the light-emitting display device is used in either the horizontal position or the vertical position.

  Hereinafter, an example of an electro-optical display device to which the present invention is applied will be described with reference to the drawings. FIGS. 1A to 1C are a rear view, a side view, and a plan view showing an electro-optical display device of this example, and FIG. 2 is an exploded perspective view of the electro-optical display device when viewed from the back side.

  As shown in these drawings, the electro-optic display device 1 has a flat square shape as a whole, and has a device case 4 including a front side case portion 2 and a back side case portion 3. The device case 4 includes a transparent plastic plate 5 disposed on the back surface of the front case portion 2, a holding plate 6 disposed on the back surface side, and an LED substrate 7 disposed on the back surface side.

  The front-side case portion 2 includes a square front plate portion 21 and an outer peripheral side plate portion 22 having a constant width that is bent rearward from the outer peripheral edge of the front plate portion 21 at a right angle. The front plate portion 21 is formed with square front openings 23 vertically and horizontally at regular intervals. Here, the width dimension of the outer peripheral frame 24 from the outer peripheral edge of the front plate portion 21 to the outermost front opening 23 is approximately ½ of the width of the frame 25 between the front openings. The surface of the front plate portion 21 is painted black. Furthermore, the eaves member 8 is attached to the surface of the front plate portion 21 in parallel between the front openings 23 of each row.

  The transparent plastic plate 5 disposed on the back surface of the front plate portion 21 is an acrylic plate having an ultraviolet blocking function. It is a square plate that is substantially the same as the front plate portion 21. The holding plate 6 that fixes the transparent plastic plate 5 to the front plate portion 21 has a square shape that is substantially the same size as the transparent plastic plate 5, and corresponds to each front opening 23 of the front plate portion 21. In addition, a rear opening 61 having the same shape is formed.

  The LED substrate 7 has a configuration in which a plurality of square LED substrates 71 are connected in the vertical and horizontal directions. In this example, the LED substrate 7 includes four LED substrates 71. On the front surface of each LED substrate 71, LEDs or LED groups for forming one display dot are arranged vertically and horizontally at regular intervals. Each LED or each LED group for forming one display dot is in a position facing each rear opening 61. A narrow space for heat dissipation 72 is formed between the LED substrates 71.

  Next, the back-side case portion 3 includes a square frame 31 fixed to the front-side case portion 2 side, a square back plate 32 fixed to the back of the frame 31, and a control fixed therebetween. A panel mounting member 33 and fixing plates 34 and 35 mounted on the upper and lower frame portions of the frame 31 from the front side are provided. A control panel 36 for controlling light emission is mounted on the control panel mounting member 33 from the rear side. In addition, vents 37 and 38 are formed at both corners on one diagonal line of the back plate 32. An exhaust fan 12 for heat dissipation is attached to the front side of the vent 37 located on the upper side via a filter 11. A filter 13 is attached to the front side of the other lower vent 38.

  In the electronic display device 1 of this example configured as described above, a transparent plastic plate covering the LED is held between the lattice-shaped front plate portion 21 and the pressing plate 6. A plurality of eaves members 8 are attached to the surface of the front plate portion 21 in parallel in the horizontal direction. Therefore, the transparent plastic plate 5 can be reliably held, and the strength of the device case 4 can be increased. Therefore, there is no problem in strength even if the width of the outer peripheral frame of the front plate portion 21 is reduced to ½ of the width of the opening frame.

  Moreover, the LED group which comprises 1 display dot is each divided by the frame before and behind a square, and the black coating is given to the frame surface of the front board part 21. FIG. Further, outside light such as sunlight is blocked by the eaves member 8. Therefore, there is an advantage that the contrast of the display dots can be increased and display characters and images are easy to see.

  Furthermore, when the electro-optic display device 1 is connected vertically and horizontally to produce a large electro-optic display device, the frame width of the joint portion of the electro-optic display device 1 is the same as the frame width of each display dot. FIG. 3 is an explanatory view showing the front plate portion 21 when the electro-optic display device 1 is connected in the horizontal direction. As shown in this figure, at the joint between the front plate portions 21 (1) and 21 (2) of the electro-optical display devices 1 (1) and 1 (2), the outer peripheral frame width W1 of each front plate portion is the opening frame width. Since it is 1/2 of W2, the interval between the joint portions can be made the same as the other portions, and the display characters and images are not cut off. Therefore, it is possible to improve the display quality of characters and images of the manufactured large-sized electronic display device. Of course, three or more electro-optic display devices 1 may be connected in the horizontal direction or may be connected in the vertical direction.

  On the other hand, the LED substrate 7 is configured by connecting a plurality of LED substrates 71, and heat radiation gaps 72 are formed between the LED substrates 71 in the vertical and horizontal directions. Therefore, the heat generated inside the device case 4 is efficiently released to the outside by the exhaust fan 12 on the back side through the gap 72. Therefore, the light-emitting display device 1 with high heat dissipation efficiency can be realized.

  In addition to this, the pair of vents 37 and 38 formed in the back plate 32 can correspond to both the case where the electronic display device 1 is placed vertically and the case where it is placed horizontally. In the case of the vertically placed state shown in FIGS. 1 and 2, the vent 37 located on the upper side is located on the lower side when placed horizontally. On the contrary, the other vent 38 is on the upper side. Therefore, when placed horizontally, the exhaust fan 12 attached to the vent 37 may be removed and attached to the vent 38 on the upper side.

  FIG. 4A is an explanatory diagram showing an LED group forming one display dot arranged on the surface of the LED substrate 71. On the surface of the LED substrate 71, LED groups 15 forming one display dot vertically and horizontally are arranged at regular intervals. The LED groups 15 are arranged so that their centers coincide with the centers of the corresponding front and rear openings 23 and 61, respectively. The LED group 15 includes, for example, two red LEDs 15R (1) and 15R (2), one green LED 15G, and one blue LED 15B, and the green LED 15G is arranged above the left column, A red LED 15R (1) is arranged on the side, and the LEDs are arranged so as to be shifted from each other by a certain pitch p in the vertical and horizontal directions.

  When this arrangement is adopted, each LED can be seen when viewed from the top, bottom, left, and right directions, and the LED is not hidden by other LEDs. Therefore, when viewed from the side or the like, a part of the LEDs forming each display 1 dot is hidden, and it is possible to prevent an adverse effect that characters and images of the intended color tone cannot be visually recognized.

  In this example, as described above, it can be used horizontally and vertically, and in either case, the LED is not hidden when viewed from the horizontal direction. The electro-optical display device is not viewed from directly above or directly below, and is generally viewed from the front or the left and right. Therefore, when the installation posture is fixed, an LED array that does not hide the LED when viewed from the lateral direction may be employed. For example, as shown in FIG. 4 (b), two LEDs arranged on the left and right may be shifted up and down. In this case, the LEDs are hidden from the vertical direction, but four LEDs can be seen from the horizontal direction.

  In this example, one display dot is formed by four LEDs, but it is needless to say that one display dot may be formed by a different number of LEDs. Further, one dot of display can be formed by a single LED, and a light emitter other than the LED can also be used.

It is the rear view, side view, and top view which show an example of the electroluminescent display apparatus to which this invention is applied. It is a disassembled perspective view at the time of seeing the electroluminescent display apparatus of FIG. 1 from the back side. It is explanatory drawing which shows the state which connected the electroluminescent display apparatus of FIG. It is explanatory drawing which shows the LED group which comprises the display 1 dot arranged on the LED board of the electroluminescent display apparatus of FIG. It is explanatory drawing which shows the conventional electroluminescent display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric light-emitting display device 2 Front side case part 3 Back side case part 4 Device case 21 Front plate part 22 Side plate part 23 Front side opening 24 Outer frame 25 Frame 5 Transparent plastic board 6 Holding plate 61 Rear side opening 7, 71 LED board 72 Heat dissipation Clearance 8 庇 member 12 Exhaust fan 15 LED group 15R (1), 15R (2) for one dot Red LED
15G green LED
15B Blue LED
31 Frame 32 Back plate 37, 38 Vent

Claims (8)

A device case consisting of a front case part and a back case part;
A transparent plastic plate disposed on the back side of the front case part in the device case;
A holding plate disposed on the back side of the transparent plastic plate in the device case;
An LED board disposed on the back side of the pressing plate in the device case;
The front side case portion includes a front plate portion and an outer peripheral side plate portion that is bent rearward from the outer peripheral edge of the front plate portion. And
A rear opening is formed in the holding plate vertically and horizontally at regular intervals, each rear opening is opposed to each front opening of the front plate portion,
On the front surface of the LED substrate, light emitters or light emitter groups for forming one display dot are arranged at regular intervals vertically and horizontally, and each light emitter or each light emitter for forming one display dot is arranged. The group is a light-emitting display device facing each rear opening. In claim 1,
An electro-optical display device in which a width dimension of an outer peripheral frame from an outer peripheral edge of the front plate portion of the front side case portion to the outermost front opening is approximately ½ of a width of a frame partitioning each front opening. In claim 1 or 2,
A light-emitting display device in which a black coating is applied to a surface of the front plate portion of the front side case portion. In claim 1, 2 or 3,
A light-emitting display device in which a gutter member is fixed between the front openings of each row on the front or back surface of the front plate portion of the front case portion or the back surface of the transparent plastic plate. In any one of claims 1 to 4,
The transparent plastic plate is an electric display device having an ultraviolet blocking function. In any one of claims 1 to 5,
The light emitter substrate has a configuration in which light emitter substrates having the same shape are arranged vertically and horizontally,
An electric display device in which a gap for heat dissipation is formed between each light emitting substrate. In any one of claims 1 to 6,
The rear display case has a rectangular shape, and an electronic display device in which one end of each diagonal line has intake and exhaust vents. In claim 7,
Among the vents, the one vent hole located on the upper side is an exhaust port to which an exhaust fan is attached, and the other vent hole located on the lower side is an electronic display device.

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