JP4494176B2 - Display device - Google Patents

Description

  The present invention relates to a display device using an LED (Light Emitting Diode) as a light source.

  2. Description of the Related Art Display devices using a cold cathode lamp as a light source, for example, a guide light device that informs the location of an emergency exit are known. In such a system, a power source unit for converting an AC commercial power source into a DC power source and a high-frequency lighting device that operates with a DC voltage from the power source unit are provided, thereby lighting a cold cathode lamp disposed on the display panel. (For example, refer to Patent Document 1).

JP-A-8-273212

  For example, one cold cathode lamp uses a high voltage, high frequency power source of AC430V, 45-60 kHz. Such a high voltage, high frequency power supply basically tends to generate a leakage current with respect to ground. Furthermore, since the cold cathode lamp is a thin lamp and the current is as small as about 6 mA, if a leak occurs, sufficient brightness cannot be obtained and the lamp becomes dark. That is, when the cold cathode lamp and the lighting device (inverter power supply) are separated from each other and are connected by an output line, a leakage current flows from the output line, and the current flowing to the cold cathode lamp is reduced and darkened. Therefore, in a display device using a cold cathode lamp as the light source, the light source and the lighting device cannot be separated, and the light source and the lighting device are both housed in the fixture body and arranged on the display panel side. The size of the entire display unit is unavoidable.

  The technical problem of the present invention is that the lighting device and the light source can be arranged at positions separated from each other, and the lighting device and the light source, that is, the display panel can be extended and connected by a metal pipe or the like, so that the entire display unit It is to make it possible to achieve downsizing.

A display device according to the present invention includes a fixture main body provided with a lighting device for stepping down a commercial power source to a predetermined voltage, an LED light source , a display panel on which light emitted from the LED light source is incident, and a back side of the display panel. And a lid-like display plate holding member that accommodates the display panel and dissipates heat generated from the LED light source, and a substrate to which the LED light source is attached, and the display panel is integrated with the display plate holding member. The display panel unit is provided with a lamp cover made of a material having a good heat dissipation characteristic, which is detachably attached to the display plate holding member so as to be held by the display panel holding member, and a lighting device and an LED light source disposed inside the display panel unit. preparative electrically wire insertion to connect, and a pipe for mechanically connecting the instrument body and a display panel unit, those having a.

According to the display device of the present invention, since an LED is used as a light source and a low voltage constant current is output from the lighting device to the LED light source, there is no problem of leakage current as in the prior art, and an electric wire connecting the light source and the lighting device ( No leakage current flows from the output line. For this reason, the electric wire which connects a light source and a lighting device can be lengthened, and a lighting device and a light source can be arrange | positioned in the position away. And it can extendly connect between a lighting device and a light source, ie, between an instrument main body and a display panel unit, with a metal pipe etc., and a design freedom expands. Furthermore, since the display panel unit can be thinned, the entire display unit can be reduced in size, and an excellent aesthetic appearance can be obtained.
In addition, a lid-like display board holding member that houses the display panel and dissipates heat emitted from the LED light source is disposed on the back side of the display panel, and the LED light source substrate is a lamp cover made of a material having good heat dissipation characteristics. Since the lamp cover is detachably attached to the display plate holding member so that the display panel is held between the lamp cover and the display plate holding member, the display panel can be securely removed from the display plate holding member. This can be prevented and the lamp can be easily replaced. Furthermore, the heat generated from the LED light source can be dissipated from the front side.

Embodiment 1 FIG.
The present invention will be described below with reference to illustrated embodiments.
1 is an exploded perspective view showing the overall configuration of a display device according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a state during the assembly, and FIG. 3 is a perspective view showing a state after the assembly is completed. 4 is a front view including a partial cross-sectional view of the clamp member of the decorative panel, FIG. 5 is an exploded perspective view showing the relationship between the pipe and the display panel unit, and FIG. 6 is an assembled state of the pipe and the display panel unit. FIG.

  The display device of the present embodiment includes a bottomed cylindrical appliance body 1 provided with a lighting device (not shown) that lowers the commercial power source to a predetermined voltage and converts the voltage to direct current, and an LED light source 2. A display panel 4 having a display panel, that is, an induction display panel 3, and a display panel unit 4 arranged away from the instrument body 1 and an electric wire (not shown) electrically connecting the lighting device and the LED light source 2 are inserted therein. And a metal pipe 5 that mechanically connects the instrument body 1 and the display panel unit 4, and a short pipe 5 a that is provided on the pipe 5 and protrudes in the direction orthogonal to the axis thereof and the tip abuts against the display panel unit 4. 5b. In addition to the lighting device, the appliance main body 1 is supplied with power from the battery, a charging circuit for charging the battery, and a commercial power source at normal times, and is supplied with power from the battery at the time of a power failure or the like. A switching circuit for switching is also provided. Alternatively, a lighting device may be used in which LED light sources are connected in anti-parallel, and an AC power source in which a commercial power source is stepped down to a predetermined voltage is fed to the LED light source to turn on the LED light source.

  More specifically, the LED light source 2 is configured by integrating the LED substrate 6 with a lamp cover 7 made of a material having good heat dissipation characteristics (for example, aluminum) as shown in FIGS. 5 and 6.

  In addition, the guidance display panel 3 includes a front panel 3a on which a display pattern (guidance display) is drawn, and a light guide plate that is processed to make the luminance constant and is arranged on the back surface of the front panel 3a. 3b, an optical sheet 3c arranged on the back surface of the light guide plate 3b to increase brightness, and a front panel 3a, the light guide plate 3b, and a resin transparent frame 3d for holding the optical sheet 3c.

  Further, on the back side of the guidance display panel 3, a lid-like display board holding member 8 that houses the guidance display panel 3 and dissipates heat emitted from the LED light source 2 is provided. By connecting to the pipe 5 side, the instrument body 1 and the display panel unit 4 are connected. FIG. 5 shows the case where the mounting bracket 11 is interposed between the pipe 5 and the display plate holding member 8, but the case where short pipes 5a and 5b as shown in FIGS. 1 to 3 are interposed. Is fixed to the pipe 5 by welding or the like, and the flange provided at the other end of the short pipes 5a and 5b and the display plate holding member 8 are connected by screws 9. It has become. That is, the mounting bracket 11 and the short pipes 5a and 5b are provided in order to form a gap between the pipe 5 and the display panel holding member 8 to increase the cooling efficiency, and are not necessarily required. The pipe 5 and the display plate holding member 8 may be directly connected. The wiring from the lighting device to the LED light source 2 is connected to the LED light source unit by housing the electric wires from the pipe 5 into the short tubes 5a and 5b and inserting the electric wires from the back surface of the display board holding member 8. . Moreover, it is good to equip an electric wire with a connector so that the pipe 5 and the short pipes 5a and 5b can be removed from the instrument main body 1 and the display board holding member 8. FIG. Further, if the display plate holding member 8 is made of aluminum die cast or the like with good heat dissipation characteristics and a gap is formed between the display plate holding member 8 and the cooling efficiency can be further increased.

  In addition, the lamp cover 7 is detachably attached to the display plate holding member 8 with screws 12 so that the lamp display 7 and the display plate holding member 8 hold the guide display panel 3. It is possible to reliably prevent the plate holding member 8 from falling off and to easily replace the lamp. Furthermore, the heat generated from the LED light source 2 can be dissipated from the front side.

  The instrument body 1 is installed so as to be embedded in the ceiling with the opening facing downward, and a hole 1b through which the anchor bolt 13 on the ceiling is inserted is formed in the bottom 1a as shown in FIGS. A basically U-shaped pedestal 14 protruding downward is attached to the periphery of the hole 1b, and a hole into which the anchor bolt 13 can be inserted is formed at the center of the pedestal 14. Therefore, the instrument main body 1 can be connected to the anchor bolt 13 by passing the anchor bolt 13 through the hole 1b of the instrument main body 1 from the hole 1b and attaching the nut 15 to the penetrating end. At that time, the nut 15 may be screwed into the through portion from the base 14 of the anchor bolt 13, so that the fastening stroke is short, and the fastening work position is also located in the middle part of the instrument body 1. Easy to work.

  In addition, slits 14a and 14b are formed in the U-shaped leg portions of the pedestal 14, respectively. On the other hand, at the base end of the pipe 5, the claws 16a for attaching the slits 14a and 14b of the pedestal 14 with one touch , 16b, and a U-shaped gripping bracket 16 is provided. Therefore, the base end portion of the pipe 5 is inserted into the opening of the instrument body 1 through a hole (not shown) opened in the ceiling (FIG. 1), and the claws 16a and 16b of the gripping metal fitting 16 are slit 14a, If each is inserted in 14b, the pipe 5 and the instrument main body 1 will be connected (FIG. 2), and these will be hold | maintained at the anchor bolt 13. FIG.

  The pipe 5 is provided with a clamp member 18 for attaching a ring-shaped decorative panel 17 that covers a hole in the ceiling through which the pipe 5 passes. As shown in FIG. 4, the clamp member 18 includes a double nut 21 having a flange 21 a and formed with an internal thread 21 b and an external thread 21 c on the inner peripheral surface and the outer peripheral surface, and an internal thread 22 a that is screwed to the external thread 21 c of the double nut 21. And includes a decorative nut 22 that sandwiches the decorative panel 17 in cooperation with the flange 21a of the double nut 21, and changes the screwing position between the male screw 5e formed on the pipe 5 and the female screw 21b of the double nut 21. The attachment position of the decorative panel 17 to the pipe 5 can be adjusted. Thereby, attachment to the pipe 5 of the decorative panel 17 becomes easy, and workability | operativity improves.

  As described above, in this embodiment, an LED is used as the light source, and a low voltage constant current is output from the lighting device to the LED light source 2, so that there is no problem of leakage current as in the prior art, and the electric wire connecting the light source and the lighting device. No leakage current flows from the (output line). For this reason, the electric wire which connects a light source and a lighting device can be lengthened, and a lighting device and a light source can be arrange | positioned in the position away. Then, the lighting device and the light source, that is, the fixture body 1 and the display panel unit 4 can be extendedly connected by the metal pipe 5 or the like, and the degree of freedom in design is expanded. Furthermore, since the display panel unit 4 can be made thin, the display unit as a whole can be miniaturized and an excellent aesthetic appearance can be obtained.

Embodiment 2. FIG.
FIG. 7 is a perspective view showing the overall configuration of a display device according to Embodiment 2 of the present invention. In the figure, the same or corresponding parts as those in Embodiment 1 are given the same reference numerals.

  In the display device of this embodiment, display panel units 4A and 4B having display plate holding members 8 and 8, that is, induction display panels 3 and 3 are provided on both sides of a pipe 5 via short tubes 5a, 5b, 5c and 5d, respectively. The other configurations are the same as those of the first embodiment, and all the functions of the first embodiment are provided.

  In the present embodiment, the display panel units 4A and 4B on both sides are connected to the pipe 5 through the short pipes 5a, 5b, 5c and 5d, so that the space between the pipe 5 and the display plate holding members 8 and 8 is between them. In addition, it is possible to secure a sufficient gap for cooling, respectively, and to improve the cooling efficiency. Moreover, since a single lighting device can supply power to the plurality of display panel units 4A and 4B, the device can be made compact. Furthermore, since the guidance display can be seen from both sides, for example, when there is an emergency staircase in the center of a long corridor, it is not necessary to separately install a lighting device or the like, which is economical.

Embodiment 3 FIG.
FIG. 8 is an exploded perspective view showing the entire configuration of the display device according to Embodiment 3 of the present invention. In the figure, the same or corresponding parts as those in Embodiment 1 are given the same reference numerals.

  The display device of this embodiment is provided with a pedestal 14 and a plurality (two) of spring hanging portions 31 a and 31 b for attaching this to the anchor bolt 13 on the ceiling, and at the base end of the pipe 5. The decorative panel 17 is attached by the clamp member 18, and the decorative panel 17 is elastically engaged with the spring hanging portions 31a and 31b at a plurality of locations (two locations) on the end surface of the decorative panel 17, respectively. V springs 32a and 32b to be pressed are provided, and other configurations are the same as those in the first embodiment.

  In this embodiment, in order to connect the pipe 5 side to the instrument main body 1 attached to the anchor bolt 13, first, the V springs 32a and 32b are compressed, and the spring hooks 31a and 31b are aligned, It inserts into the opening of the instrument main body 1 through a hole (not shown) provided in the ceiling and engages with the spring hooks 31a and 31b. Thereby, the pipe 5 and the instrument main body 1 are connected, and these are held by the anchor bolt 13. The hole in the ceiling is closed by the decorative panel 17 that is biased upward by the elastic force of the V springs 32a and 32b.

  Thus, by using the V springs 32a and 32b, the pipe 5 can be attached to the instrument body 1 with one touch also in the present embodiment.

Embodiment 4 FIG.
FIG. 9 is a perspective view showing the overall configuration of a display device according to Embodiment 4 of the present invention. In the figure, the same or corresponding parts as those in Embodiment 1 are given the same reference numerals.

  The display device of the present embodiment is a display device of the single-sided display method described in the first embodiment or the third embodiment described above, in which the lighting device 41 is provided so as to protrude from the instrument body 1 to the side. Other configurations are the same as those in the first or third embodiment.

  In the present embodiment, the lighting device 41 is provided so as to protrude laterally from the instrument main body 1, whereby the height dimension of the instrument main body 1 can be compressed, and the instrument main body 1 can be mounted even in a shallow ceiling space. Can be embedded in the ceiling.

Embodiment 5 FIG.
FIG. 10 is a perspective view showing the overall configuration of a display device according to Embodiment 5 of the present invention. In the drawing, the same or corresponding parts as those in Embodiment 2 are given the same reference numerals.

  The display device according to the present embodiment is a display device of the double-sided display method described in the above-described second embodiment, in which the lighting device 41 is provided so as to protrude laterally from the instrument body 1, and the other configurations are as follows. This is the same as in the second embodiment.

  Also in this embodiment, by providing the lighting device 41 so as to protrude from the side of the instrument main body 1, the height dimension of the instrument main body 1 can be compressed, and the instrument main body 1 can be mounted even in a shallow ceiling space. Can be embedded in the ceiling.

  In the above-described first to fifth embodiments, the device body 1 has a cylindrical shape, and the lighting device is provided as an example by projecting the device body 1 to the inside or the side. The shape is not limited to a cylinder, and may be a polygonal cross section. In this case, the ceiling hole and the decorative panel 17 may be formed in a polygon.

Embodiment 6 FIG.
In the display device of the present embodiment, the shape of the appliance main body 1 provided with the lighting device described in the first to fifth embodiments is formed into a shape that can be stored in a switch box.

  As in the present embodiment, by forming the shape of the appliance main body 1 provided with the lighting device into a shape that can be stored in the switch box, it can be attached to a ceiling, a wall, or the like without special installation work.

Embodiment 7 FIG.
FIG. 11 is a side view showing the overall configuration of a display device according to Embodiment 7 of the present invention, and FIGS. 12 to 14 are all perspective views showing examples of attachment to the building. Portions that are the same as or correspond to those in Embodiment 1 are given the same reference numerals.

  In the display device of this embodiment, the appliance main body 1A provided with the lighting device described in the first embodiment is narrower than the display panel unit 4 and partly protrudes from the periphery of the display panel unit 4. The instrument main body 1A is formed around a pipe 5 in which the instrument main body 1A and the display panel unit 4 are overlapped and arranged, and an electric wire (not shown) is inserted to electrically and mechanically connect between them. The display panel unit 4 is formed so as to be relatively rotatable, and the protruding portion of the instrument main body 1A is configured as a mounting portion 1a to the building, and the other configuration is the same as that of the first embodiment.

  In this embodiment, when attaching a display apparatus to a ceiling, the instrument main body 1A and the display panel unit 4 are relatively rotated, and the attachment portion 1a of the instrument main body 1A is positioned upward as shown in FIGS. Adjust as follows. Moreover, when attaching a display apparatus to a wall, it adjusts so that the attaching part 1a of the instrument main body 1A may be located in the side like FIG. Furthermore, when attaching a display apparatus to a tabletop or a crosspiece, it adjusts so that the attaching part 1a of 1 A of instrument main bodies may be located below like FIG.

  As described above, in the present embodiment, the display panel unit 4 can be rotated relative to the instrument main body 1A. Therefore, even if the instrument main body 1A is installed on a ceiling, a wall, a desk, etc., the display surface is predetermined. Can change direction.

Embodiment 8 FIG.
FIG. 15 is a side view showing the overall configuration of the display device according to the eighth embodiment of the present invention, and FIGS. 16 to 18 are all perspective views showing examples of attachment to the building. Portions that are the same as or correspond to those in Embodiment 2 are given the same reference numerals.

  The display device according to the present embodiment includes a fixture body 1A having the lighting device described in the second embodiment, which is narrower than the display panel units 4A and 4B on both sides, and part of the display panel units 4A and 4B on both sides. 4B is formed in a shape protruding from the peripheral edge of the 4B, and the instrument body 1A and the display panel units 4A and 4B on both sides are overlapped with each other, and an electric wire (not shown) is inserted therethrough between the electrical and mechanical The instrument body 1A and the display panel units 4A and 4B are formed so as to be relatively rotatable around the pipes 5A and 5B to be connected to each other, and the protruding part of the instrument body 1A is configured as a mounting part 1a to the building. There are other configurations, which are the same as those of the second embodiment.

  In the present embodiment, when the display device is attached to the ceiling, the fixture body 1A and the display panel units 4A and 4B on both sides are rotated relative to each other so that the attachment portion 1a of the fixture body 1A is as shown in FIGS. Adjust so that it is positioned above. Moreover, when attaching a display apparatus to a wall, it adjusts so that the attaching part 1a of the instrument main body 1A may be located in a side like FIG. Furthermore, when attaching a display apparatus to a tabletop or a crosspiece, it adjusts so that the attaching part 1a of the instrument main body 1A may be located below like FIG.

  As described above, also in this embodiment, the display panel units 4A and 4B can be rotated relative to the instrument main body 1A. Therefore, even if the instrument main body 1A is installed on a ceiling, a wall, a desk or the like, the display surface can be displayed. It can be changed in a predetermined direction.

It is a disassembled perspective view which shows the whole structure of the display apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state in the middle of the assembly | attachment of the display apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state after the assembly | attachment completion of the display apparatus which concerns on Embodiment 1 of this invention. It is a front view including the partial cross section display of the clamp member of the decorative panel of the display apparatus which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the relationship between the pipe and display panel unit of the display apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the assembly | attachment state of the pipe and display panel unit of the display apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the whole structure of the display apparatus which concerns on Embodiment 2 of this invention. It is a disassembled perspective view which shows the whole structure of the display apparatus which concerns on Embodiment 3 of this invention. It is a perspective view which shows the whole structure of the display apparatus which concerns on Embodiment 4 of this invention. It is a perspective view which shows the whole structure of the display apparatus which concerns on Embodiment 5 of this invention. It is a side view which shows the whole structure of the display apparatus which concerns on Embodiment 7 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 7 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 7 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 7 of this invention. It is a side view which shows the whole structure of the display apparatus which concerns on Embodiment 8 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 8 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 8 of this invention. It is a perspective view which shows the example of attachment to the building of the display apparatus which concerns on Embodiment 8 of this invention.

Explanation of symbols

1, 1A instrument body, 1a mounting portion, 2 LED light source, 3 guidance display panel (display panel), 4, 4A, 4B display panel unit, 5, 5A, 5B pipe, 5a, 5b, 5c, 5d short tube, 6 LED board, 7 lamp cover, 8 display board holding member, 13 anchor bolt, 14 pedestal, 16 gripping bracket (metal fitting), 16a, 16b claw, 17 decorative panel, 18 clamp member, 31a, 31b spring hook, 32a, 32b V spring (spring), 41 lighting device.

Claims (4)

An appliance body provided with a lighting device for stepping down the commercial power supply to a predetermined voltage;
An LED light source , a display panel on which light emitted from the LED light source is incident, a lid-shaped display plate holding member that is disposed on the back side of the display panel and accommodates the display panel to dissipate heat emitted from the LED light source; And a lamp cover made of a material having good heat dissipation characteristics, which is integrated with a substrate to which the LED light source is attached, and is detachably attached to the display plate holding member so as to hold the display panel with the display plate holding member. A display panel unit disposed away from the instrument body,
An electric wire that electrically connects the lighting device and the LED light source is inserted therein, and a pipe that mechanically connects the instrument body and the display panel unit;
Display apparatus comprising: a. The panel holding member by connecting the pipe-side display device according to claim 1, wherein the connecting the display panel unit and the instrument body. Lighting device, a display device according to claim 1 or claim 2, wherein the provided to protrude laterally from the instrument body. The instrument body, a display device according to claim 1 or claim 2, wherein it has a shape that can be accommodated in the switch box.

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