JP4976960B2 - Guide light - Google Patents

Description

  The present invention relates to a guide light of a light guide type that is a kind of display lamp in which a light guide plate is disposed on the rear surface side of a display plate and a light source is disposed opposite to an end surface of the light guide plate, and the guide uses a plurality of light sources It is about a light.

  In recent years, a guide light of a light guide system that employs a cold cathode lamp as a light source has become mainstream.

  Small, medium-sized guide light with a square front view (Class C by classifying Class A to Class C based on Article 28-3 of the Fire Service Act Enforcement Regulations and Fire Service Law Preliminary 245 (September 21, 1999) As shown in FIG. 6, for example, as shown in FIG. 6, the upper end surface of the light guide plate (not shown) provided on the rear surface side of the display plate 3 ′ is substantially the same as the upper end surface of the light guide plate. It is known that straight tube type cold cathode lamps 4 'having the same length are arranged to face each other. In addition, the arrow in FIG. 6 has shown the radiation | emission direction of the light from the cold cathode lamp 4 '.

  In contrast, large-sized guide lamps (class A guide lights based on the above-described class A to class C) generally use cold cathode lamps used for medium-sized guide lights.

  In addition, as a guide lamp, a technique has been proposed in which cold-cathode lamps are disposed opposite to the left and right end faces of the light guide plate (see, for example, Patent Document 1). For a large-sized guide lamp 1 using this technique, for example, As shown in FIG. 7, two cold cathode lamps 4a and 4c facing the right end surface of a light guide plate (not shown) provided on the rear surface side of the display plate 3 are arranged in a straight line and face the left end surface. Some of the cold cathode lamps 4b and 4d are arranged in a straight line. In addition, the arrow shown in FIG. 7 has shown the light radiated | emitted from the cold cathode lamp 4b.

Here, although it is conceivable to use a cold cathode lamp having the same length as that of the end face of the light guide plate, since there are relatively few large-sized guide lamps 1 in the market, a cold lamp dedicated to the large guide lamp 1 is used. Setting the cathode lamp as a standard product is not desirable from the viewpoint of cost and the like.
Japanese Patent Laid-Open No. 7-239663

  However, in the large guide lamp 1 configured as shown in FIG. 7, the two cold cathode lamps 4a and 4c facing the right end face of the light guide plate are arranged in a straight line, and the two cold cathode lamps 4b facing the left end face. , 4d are arranged in a straight line, so that one end of each of the cold cathode lamps 4a, 4c is adjacent to the vicinity of the right side of the display panel 3 corresponding to the vicinity of the non-light emitting part, and the cold cathode lamps 4b, 4d. A shadow portion 40 is generated near the central portion of the left side of the display board 3 corresponding to the vicinity of the non-light emitting part adjacent to one end of each other, making it difficult to uniformly illuminate the display board 3 without uneven brightness. In addition, since the non-light emitting portions at the other ends of the cold cathode lamps 4a, 4b, 4c, and 4d are opposed to the four corners of the light guide plate, shadow portions (not shown) are generated at the four corners of the display plate 3. Compared with the shadow portion 40 of the above, the degree of shadow is relatively low, and even if shadow portions occur at the four corners of the display panel 3, the influence on the appearance of the display panel 3 is small. Further, the shadow portions generated at the four corners of the display panel 3 are often generated even in a small and medium-sized guide light 1 'as shown in FIG.

  The present invention has been made in view of the above-mentioned reasons, and its purpose is to improve the appearance of the display plate of the guide light and to improve the guidance performance required for the guide light by preventing uneven brightness of the display plate. It is to improve.

The invention of claim 1 is a guide lamp for irradiating light from a light source disposed opposite to an end face of a rectangular plate-shaped light guide plate to a rectangular plate-shaped display plate disposed on the front side of the light guide plate. A light source is disposed opposite to each of the four end surfaces of the light plate, and the light source is disposed so as to be biased toward one end side in a direction along one outer peripheral direction of the light guide plate at each end surface of the light guide plate. To do.

  According to this invention, since the light source is disposed opposite to each of the four end surfaces of the light guide plate, the vicinity of the non-light emitting portion of the light source disposed opposite to each end surface is separated from the light source disposed opposite to the other end surface. Therefore, by preventing the uneven brightness of the display board, the appearance of the display board of the guide lamp can be improved and the guide performance required for the guide lamp can be further improved. In addition, the brightness of the display board can be easily ensured by increasing the length of the light source.

Further, according to this invention, since the arrangement to bias the light source at one end of one of the outer peripheral direction of the respective end faces each odor Te light guide plate of the light guide plate, for each light source disposed opposite to the four end faces near the non-light emitting part, luminance unevenness table示板in the light from the oppositely disposed light source other end surface is irradiated is reduced.

The invention according to claim 2 is the rectangular parallelepiped instrument body according to the invention of claim 1 , wherein two lighting devices for lighting the light sources two by two, and a rectangular parallelepiped instrument body having openings on the front side and housing both lighting devices inside And the light source is a linear discharge lamp, and the lighting device is arranged close to two opposing corners inside the fixture body, and the light source has a higher pressure side than the low pressure side of the light source. It is arranged to be close to each other.

  According to this invention, the light source is a linear discharge lamp, and lighting devices that turn on the light sources two by two are arranged close to two opposing corners inside a rectangular parallelepiped fixture body, and the light source is low pressure Since the high-voltage side is closer to the lighting device than the lighting device, the lamp wire connecting the high-voltage side of the light source and the lighting device can be shortened, and the lamp wire and the peripheral member It is possible to reduce the influence of stray capacitance and noise between them, and to prevent a decrease in illuminance, startability, and noise resistance of the light source due to leakage current.

According to a third aspect of the present invention, in the first aspect of the present invention, the lighting device for lighting the light source, a rectangular parallelepiped appliance body having an opening on the front side and housing the lighting device, and a power failure of the commercial power source A battery for backup that supplies power to the lighting device, and the light source is a linear light source, and the battery is arranged so that the light source is opposed to two opposing end surfaces of the four end surfaces of the light guide plate. It is arranged along the longitudinal direction of the light source at a position that is not.

  According to the present invention, since the battery is disposed on the end face of the light guide plate, the internal space of the instrument body can be used effectively, and the attachment part used for directly attaching the instrument body to the ceiling or attaching to the wall. The work space and the connection space can be secured inside the instrument body, and the workability is improved. Moreover, since the space inside the fixture body is widened, the capacity of the lighting device can be increased, and the cost of the lighting device can be reduced accordingly. In addition, since the battery can be disposed close to the opening of the instrument body, the workability of the battery replacement work can be improved.

The invention of claim 4 is the invention of claim 2 or claim 3, comprising a battery backup supplies power to the lighting device when the power of the commercial power supply, battery, disposed on the low pressure side of the light source It is characterized by.

  According to this invention, since the lighting device is arranged on the high pressure side of the light source, the low pressure side of the light source is less affected by the heat generated by the lighting device, and the ambient temperature is relatively low compared to the high pressure side of the light source. Thus, by arranging the battery on the low-pressure side of the light source, the temperature rise of the battery can be suppressed. Further, the appliance body can be miniaturized by suppressing the rise in battery temperature.

The invention of claim 5 is the invention of claim 1 , wherein two lighting devices for lighting the light sources two by two, a rectangular parallelepiped instrument body having an opening on the front side and housing the lighting device inside, The light source is a linear discharge lamp, one lighting device is arranged on each of the left and right sides inside the fixture body, and the two light sources that are lit by the lighting device arranged on the right side inside the fixture body are The two light sources arranged on the right side of the light guide plate and lit by the lighting device arranged on the left side inside the fixture body are arranged on the left side of the center of the light guide plate.

  According to the present invention, since the distance between the power supply line for supplying power to the lighting device and the lamp wire connecting the light source and the lighting device can be further increased, the power supply wire and the lamp wire are mutually connected. It is possible to mitigate the impact on each other. Moreover, since the wiring in the instrument body can be clearly separated to the left and right, it is possible to prevent the complexity of the assembling work during manufacturing.

  According to the first aspect of the present invention, since the light source is disposed opposite to each of the four end surfaces of the light guide plate, the vicinity of the non-light emitting portion of the light source disposed opposite to each end surface is disposed opposite to the other end surface. Since the light from the light source is irradiated, the luminance unevenness of the display board can be prevented, so that the appearance of the display board of the guide lamp can be improved and the guidance performance required for the guide lamp can be further improved.

(Embodiment 1)
As shown in FIG. 1 (a), the guide lamp 1 of the present embodiment includes a rectangular parallelepiped instrument body 2 having an opening on the front surface side, and a rectangular plate-shaped display board disposed on the front surface side of the instrument body 2 3, a light guide plate 5 that is formed in a rectangular plate shape that is substantially the same size as the display plate 3 and disposed on the rear surface side of the display plate 3, and a linear shape that is disposed to face each of the four end surfaces of the light guide plate 5. A cold cathode lamp (light source) 4a, 4b, 4c, 4d, which is a discharge lamp, is provided, and the display plate 3 and the light guide plate 5 are attached to the instrument body 2 by a frame 31 having a rectangular opening on the front side. In addition, as shown in FIG. 1 (a), the appliance main body 2 has two lighting devices 7a and 7b for lighting two cold cathode lamps 4a, 4c, 4b and 4d by receiving power supply from a commercial power source. Is stored. In the present embodiment, each of the cold cathode lamps 4a, 4b, 4c, 4d constitutes a linear light source.

  As shown in FIG. 1 (b), two end faces of the light guide plate 5 facing the cold cathode lamps 4b and 4c are used for backup to supply power to the lighting devices 7a and 7b in the event of a power failure of the commercial power source. The batteries 6 and 6 are disposed opposite to the cold cathode lamps 4b and 4c.

  The guide lamp 1 of the present embodiment is a large guide lamp (class A guide lamp) 1, and the length of each cold cathode lamp 4 a, 4 b, 4 c, 4 d is the length of one side of the light guide plate 5. The length is almost half. The cold cathode lamps 4 a, 4 b, 4 c, and 4 d are arranged to face each other on one end side along one outer peripheral direction of the light guide plate 5 at each end face of the light guide plate 5. Further, the batteries 6 and 6 are arranged opposite to each other along the longitudinal direction of the cold cathode lamps 4b and 4c at positions where the cold cathode lamps 4b and 4c are not arranged opposite to each other on the left and right end surfaces of the light guide plate 5.

  In the present embodiment, as shown in FIG. 1B, light emitted from the cold cathode lamps 4 a, 4 b, 4 c, 4 d opposed to each end face of the light guide plate 5 is 90 degrees in the light guide plate 5. Since it is irradiated in an intersecting manner, light is irradiated in the vicinity of the non-light emitting portion of each of the cold cathode lamps 4c, 4a, 4d, 4b, particularly in the vicinity of the support portions 41c, 41a, 41d, 41b at one end in the longitudinal direction. The luminance unevenness of the display panel 3 can be reduced. In addition, the arrow in FIG.1 (b) has shown the radiation | emission direction of the light from the cold cathode lamp 4b.

  Further, in this embodiment, as shown in FIG. 1B, the cold cathode lamps 4b and 4c on the left and right end surfaces of the light guide plate 5 where the cold cathode lamps 4b and 4c are opposed to the batteries 6 and 6 are not opposed to each other. Since it is arranged along the longitudinal direction of the cold cathode lamps 4b and 4c at the position, there is no need for a space for disposing the batteries 6 and 6 in the appliance main body 2. For example, the appliance main body 2 is directly attached to the ceiling. Or the space for attachment parts or the space for connection used for the attachment to a wall can be ensured in the instrument main body 2, and workability | operativity can be improved. Moreover, since the space for storing the lighting devices 7a and 7b can be secured more widely, the capacity of the lighting devices 7a and 7b can be increased. In general, the smaller the components used for the lighting devices 7a and 7b, the more expensive the components. However, by increasing the capacity of the lighting devices 7a and 7b, the components used for the lighting devices 7a and 7b. Therefore, it is not necessary to reduce the size of the lighting device, and the cost of the lighting devices 7a and 7b can be reduced. Further, since the batteries 6 and 6 can be arranged near the opening of the instrument body 2, it is advantageous in that the replacement work of the batteries 6 and 6 is facilitated.

  Further, in the present embodiment, as long as the cold cathode lamps 4a, 4b, 4c, and 4d are arranged to face the four end surfaces of the light guide plate 5, one end of the light guide plate 5 along one outer peripheral direction as described above. For example, as shown in FIG. 2, cold cathode lamps 4 a, 4 b, 4 c, and 4 d may be arranged to face each other at the center of each end face. . Moreover, the brightness | luminance of the display board 3 can be improved by lengthening the length of the cold cathode lamps 4a, 4b, 4c, and 4d.

(Embodiment 2)
By the way, when the cold cathode lamps 4a, 4b, 4c, and 4d, which are linear discharge lamps, are used as light sources as in the first embodiment, the cold cathode lamps 4a, 4b, 4c, and 4d supply high-frequency power. Therefore, the lighting devices 7a and 7b are connected to the high-voltage side of the cold cathode lamps 4a, 4b, 4c and 4d (hereinafter referred to as high-pressure side lamp wires), and the lighting devices 7a and 7b and the cold-cathode lamps are connected. 4a, 4b, 4c, 4d Low-voltage side of the lamp wire (hereinafter referred to as low-voltage side lamp wire) connected to the low-voltage side and the peripheral member between these peripheral members, startability deterioration due to leakage current, illuminance reduction Careful attention is required. In particular, the stray capacitance between the high-voltage side lamp wire connected to the high-voltage side of the cold cathode lamps 4a, 4b, 4c, and 4d and the peripheral members described above gives the lighting operation of the cold cathode lamps 4a, 4b, 4c, and 4d. The impact is great. It is also necessary to pay attention to the fact that the noise resistance performance is lowered due to the influence of noise from the peripheral members described above. Considering these, it is necessary to make the high-voltage lamp wire as short as possible.

  Therefore, as shown in FIG. 3, the guide lamp 1 according to the present embodiment is provided with the rectangular parallelepiped lighting devices 7 a and 7 b close to two opposing corners inside the rectangular parallelepiped body 2, The lamps 4a, 4b, 4c and 4d are arranged so that the high pressure side is closer to the lighting devices 7a and 7b than the low pressure side.

Specifically, the cold cathode lamp 4a is arranged so that the left support part 41a side in FIG. 3 is on the high pressure side, and the cold cathode lamp 4b is arranged so that the upper support part 42b side in FIG. 3 is on the high pressure side. The cold cathode lamp 4c is arranged so that the lower support part 42c side in the figure is the high pressure side, and the cold cathode lamp 4d is arranged so that the right support part 41d side in the figure is the high pressure side. The lighting device 7a has a side surface provided with a lamp wire lead-out portion 73a from which the lamp wires 71c, 72c, 71d, 72d are led out at a position close to the lower right corner inside the fixture body 2, and a lower side of the fixture body 2. It is arrange | positioned so that an inner wall may be opposed. On the other hand, the lighting device 7b, as shown in FIG. 3, a position close to the upper left corner of the internal instrument body 2, the lamp wires 71a, 72a, 71b, the lamp wire draw-out portion 73 b which 72b is led out set vignetting The side surface is arranged so as to face the upper inner wall of the instrument body 2. Moreover, the electric wires 61 led out from the batteries 6 and 6 are connected to the lighting devices 7a and 7b. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Therefore, in the present embodiment, the lamp wire lead-out portion 73b of the lighting device 7b, the support portion 41a on the high-pressure side of the cold cathode lamp 4a, and the support portion 42b on the high-pressure side of the cold cathode lamp 4b are brought close to each other. Since 71a, 71b can be made shorter, the cold cathode lamp 4a, due to the leakage current from the high voltage side lamp wires 71a, 71b due to the stray capacitance between the high voltage side lamp wires 71a, 71b and the peripheral members described above, It is possible to prevent the illuminance decrease and the startability deterioration of 4b. In addition, it is possible to reduce the influence of noise from the above-mentioned peripheral members, and to prevent a reduction in noise resistance performance. Also, the lamp wire lead-out portion 73a of the lighting device 7a, the high-pressure side support portion 42c of the cold cathode lamp 4c, and the high-pressure side support portion 41d of the cold cathode lamp 4d are brought close to each other as described above.

  Further, in the guide light 1, the temperature rise of the batteries 6 and 6 is often a problem, but in the present embodiment, the batteries 6 and 6 are arranged in a space where the influence of heat generated from the lighting devices 7a and 7b is small. Thereby, the temperature rise of the batteries 6 and 6 can be suppressed.

  Specifically, the lighting device 7a is disposed close to the high pressure side support portions 42c and 41d of the cold cathode lamps 4c and 4d, and the lighting device 7b is disposed on the high pressure side support portions 41a and 41b of the cold cathode lamps 4a and 4b. By arranging it close to 42b, the vicinity of the support portions 42a, 41b, 41c, 42d on the low pressure side of the cold cathode lamps 4a, 4b, 4c, 4d is compared with the vicinity of the support portions 41a, 42b, 42c, 41d. The influence of heat generated by the lighting devices 7a and 7b can be reduced, and the ambient temperature can be kept relatively low compared to the vicinity of the support portions 41a, 42b, 42c, and 41d. Then, by arranging the batteries 6 and 6 on the end faces of the light guide plate 5 near the support portions 42a and 41c and near the support portions 41b and 42d, it is possible to suppress the temperature rise of the batteries 6 and 6. Further, the appliance main body 2 can be downsized as much as the temperature increase of the batteries 6 and 6 is suppressed.

(Embodiment 3)
By the way, the influence of the stray capacitance and noise described in the second embodiment needs to be paid attention to the power supply line 9 that supplies power to the lighting devices 7a and 7b. Considering these, the distance between the power supply line 9 and the lamp electric wires 71a, 71b, 71c, 71d, 72a, 72b, 72c, 72d needs to be as long as possible.

  Therefore, the basic configuration of the guide light 1 of the present embodiment is substantially the same as that of the second embodiment, and as shown in FIG. 4, a rectangular parallelepiped shape disposed on the right side from the center inside the rectangular parallelepiped instrument body 2. The lighting device 7a lights the cold cathode lamps 4a and 4c, and the rectangular parallelepiped lighting device 7b disposed on the left side from the center inside the fixture body 2 lights the cold cathode lamps 4b and 4d. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 2, and description is abbreviate | omitted.

Specifically, the cold cathode lamp 4a is arranged such that the left support portion 41a in FIG. 4 is on the low pressure side, and the cold cathode lamp 4c is arranged so that the lower support portion 42c in FIG. The lamp 4b is arranged so that the upper support part 42b in the figure is on the low pressure side, and the cold cathode lamp 4d is arranged so that the right support part 41d in the figure is on the low pressure side.
The lighting device 7 a has a side surface provided with a lamp wire lead-out portion 73 a from which the lamp wires 71 a, 72 a, 71 c, 72 c are led out at a position near the upper right corner inside the rectangular parallelepiped tool body 2. It is arrange | positioned so that the inner wall of this may be opposed. On the other hand, the lighting device 7b has a side surface provided with a lamp wire lead-out portion 73b from which the lamp wires 71b, 72b, 71d, 72d are led at a position near the lower left corner inside the fixture body 2 on the left side of the fixture body 2. It is arrange | positioned so that an inner wall may be opposed. Further, the power line connecting portion 10 having a substantially square shape when viewed from the front is on the left side of the lighting device 7 a inside the fixture body 2 and on the upper side of the lighting device 7 b, and the left end portion is substantially the center of the fixture body 2. The power supply line 9 is drawn in from the vicinity of the support portion 41 a near the center of the upper end portion of the instrument main body 2 to the inside of the instrument main body 2 and connected to the power supply line connection portion 10.

  Therefore, in this embodiment, as shown in FIG. 4, the distance between the power supply line 9 and the high-voltage side lamp electric wires 71a, 71b, 71c, 71d of the cold cathode lamps 4a, 4b, 4c, 4d is made longer. Therefore, the influence of the high-voltage side lamp electric wires 71a, 71b, 71c, 71d and the power supply line 9 on each other can be reduced.

  Further, in the present embodiment, the lighting device 7a, the cold cathode lamps 4a and 4c, and the lamp electric wires 71a, 71c, 72a, and 72c are arranged on the right side of the center of the fixture body 2, while the lighting device 7b, Since the cold cathode lamps 4b and 4d and the lamp electric wires 71b, 71d, 72b and 72d are arranged on the left side of the center of the instrument body 2, the wiring in the instrument body 2 can be clearly separated to the left and right. The complexity of the assembly work at the time of manufacturing the lamp 1 can be prevented.

(Embodiment 4)
By the way, normally, at the time of construction, like the guide light 1 shown in FIG. 4, it is desirable that the lead-in portion of the power supply wire 9 is provided in the central portion of the appliance main body 2. Is preferably provided in the vicinity of the pull-in portion. However, in such an arrangement, the power line 9 and the low-voltage lamp electric wire 72a of the cold cathode lamp 4a may be close to each other, and the low-voltage lamp electric wire 72a is connected to the low-voltage side of the cold cathode lamp 4a. Even if it exists, it is not desirable to be close to the power supply line 9.

  On the other hand, the basic configuration of the guide lamp 1 of this embodiment is substantially the same as that of the third embodiment, and as shown in FIG. 5, the lamp wire connected to the low-voltage side of the power supply line 9 and the cold cathode lamp 4a. The power supply line 9 is drawn to the inside of the instrument body 2 by bypassing the left side of the support portion 41a of the cold cathode lamp 4a so as not to be close to the 72a. In addition, about the structure similar to FIG. 4, the same code | symbol is attached | subjected and description is abbreviate | omitted. Thus, in the present embodiment, the distance between the power supply line 9 and the low-voltage lamp electric wire 72a can be made longer. The instrument body 2 is directly attached to the ceiling via the attachment box portion 21.

The guide light of Embodiment 1 is shown, (a) is a schematic exploded perspective view, (b) is explanatory drawing which showed positional relationships, such as a light-guide plate. It is explanatory drawing which showed the positional relationship of a light-guide plate same as the above and a cold cathode lamp (light source). It is a principal part schematic front view which shows the guide light of Embodiment 2. FIG. It is a principal part schematic front view which shows the guide light of Embodiment 3. It is a principal part schematic front view which shows the guide light of Embodiment 4. It is principal part schematic explanatory drawing of a prior art example. It is principal part schematic explanatory drawing of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide lamp 2 Appliance main body 3 Display board 4a, 4b, 4c, 4d Cold cathode lamp (light source)
5 Light guide plate 6 Battery 7a, 7b Lighting device 31 Frame

Claims (5)

A guide lamp for irradiating light from a light source arranged opposite to an end face of a rectangular plate-shaped light guide plate to a rectangular plate-like display board disposed on the front side of the light guide plate, each of four end faces of the light guide plate The guide light is characterized in that the light source is disposed so as to be biased toward one end side in a direction along one outer peripheral direction of the light guide plate at each end face of the light guide plate . Two lighting device for lighting two by two the light source, and a rectangular parallelepiped shape of the instrument main body which is both lighting device therein has an opening on the front side is housed, the light source in a linear discharge lamp There, close the lighting apparatus into two opposite corners of the internal instrument body disposed, wherein the light source, and characterized in that is placed so as the high pressure side is closer to the lighting apparatus compared to the low pressure side of the light source The guide light according to claim 1. A lighting device for lighting the light source , a rectangular parallelepiped instrument body having an opening on the front side and housing the lighting device, and a backup battery for supplying power to the lighting device in the event of a commercial power failure The light source is a linear light source, and the battery is disposed along the longitudinal direction of the light source at a position where the light source is not opposed to two opposing end surfaces of the four end surfaces of the light guide plate. guide light as claimed in claim 1 Symbol mounting, characterized by comprising the location. A battery for backup supplies power to the lighting device when the power of the commercial power supply, battery, induction of claim 2 or claim 3 Symbol mounting characterized by comprising been placed on the low pressure side of the light source light. Two lighting devices that turn on the light source two by two, and a rectangular parallelepiped instrument body having an opening on the front side and housing the lighting device inside, the light source is a linear discharge lamp, One lighting device is arranged on each of the left and right sides inside the fixture body, and the two light sources that are lit by the lighting device arranged on the right side inside the fixture body are arranged on the right side of the center of the light guide plate. guide light as claimed in claim 1 Symbol mounting the two light sources disposed a lighting device on the left side to light is characterized by comprising disposed on the left side than the center of the light guide plate.

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