KR20040004070A - Light source unit and light emitting apparatus comprising the same - Google Patents

Abstract

PURPOSE: To provide an integrated light source unit collectively attachable and replaceable, even if it has a plurality of light sources. CONSTITUTION: This light source unit 3 is used by mounting it in a light emitting device 1. A plurality of linear light sources 30, each of which has electrodes 34a, 34b at its both ends in its longitudinal direction, are placed side by side and perpendicularly to the longitudinal direction of the linear light source 30 with prescribed intervals kept between them and are connected by connecting fixtures 31. They can be integrally attached to and detached from the light emitting device 1.

Description

Light source unit and light emitting device comprising the light source unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source unit used in a light emitting device such as a shakasten for observing an X-ray photograph or a light box for viewing a negative film of a photograph, and a light emitting device having the light source unit.

Shaukasten is for clearly observing an X-ray photograph by irradiating light from the back of the X-ray photograph, for example, as described in Japanese Patent Application Laid-Open No. 55-164878 (hereinafter referred to as a prior art). The Shaukasten has multiple fluorescent lamps and a translucent floodlight on the front.

In this prior art, although a plurality of fluorescent lamps are provided, each fluorescent lamp is attached to the socket for fluorescent lamps provided in the Shaukasten body, respectively. Therefore, when assembling or replacing the fluorescent lamp, it is necessary to install or dismantle the fluorescent lamps one by one, which causes a lot of work.

In addition, since the fluorescent lamps can be exchanged one by one, there are circumstances in which all fluorescent lamps cannot be collected and replaced at one time, and only fluorescent lamps that are not lit, for example, may be replaced. Therefore, it is easy to be in a state where the old and new fluorescent lamps are mixed, and the brightness is different in the new fluorescent lamp and the old fluorescent lamp, which causes the uneven emission.

When the light emission nonuniformity occurs, the light emission quality as the light emitting device is degraded, and in particular, Shaukasten prevents accurate reading of the X-ray image.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an integrated light source unit which can be installed and exchanged in a batch while having a plurality of light sources, and a light emitting device having the light source unit.

1 is a plan view of a saukasten.

2 is a side view of the shaukasten.

3 is a plan view of the inside of the casing from which the light source unit is removed.

4 is a side view of the lighting device.

5 is a perspective view of the light source unit.

FIG. 6A is a front view of the cold cathode tube, and FIG. 6B is a front view of the cold cathode tube equipped with a heat insulating material (retainer).

Fig. 7A is an assembled view of the connector and the cold cathode tube, and Fig. 7B is a perspective view showing the cold cathode tube and the connector after assembly.

8 is an enlarged view showing the second connection piece side (low pressure side) of the light source unit.

9 is a plan view of the casing in which the light source unit is mounted (main wiring 26 and electric wire 46 are omitted).

10 is an electrical wiring diagram inside the casing.

FIG. 11A is a cross-sectional view of the casing bottom portion, the reflecting plate and the light source, and FIG. 11B is a cross-sectional view showing a state where an electric wire passes between the casing bottom portion and the reflecting plate of FIG. 11A.

12 is a rear view of the light emitting surface construct.

FIG. 13 is a cross-sectional view taken along the line A-A of FIG.

14 is an assembly view of the light emitting surface construct and the casing.

15 is a cross-sectional view taken along the line B-B in FIG.

[Description of the code]

1 Shaukasten (Light Emitting Device)

2 device body

3 light source unit

16 reflector

17a-1 First lighting device

17a-2 first lighting device

17b-1 2nd lighting device

17b-2 2nd lighting device

25a high voltage side output connector

25b low voltage output connector

30 linear light sources

31 end connections

34a high-side electrode

34b low voltage side electrode

40 1st connecting piece

41 2nd connecting piece

The present invention relates to a light source unit, which is a light source unit mounted and used in a light emitting device, wherein a plurality of linear light sources having electrodes at both ends in a longitudinal direction are connected at a predetermined interval in a direction orthogonal to the longitudinal direction of the linear light source. At the same time it is integrally connected to, characterized in that the removable for the light emitting device.

According to the present invention, since a plurality of linear light sources are integrated, it is possible to collectively install and replace the plurality of linear light sources.

In addition, the plurality of linear light sources preferably have a single connector for connecting to the low pressure side output of the lighting device provided in the light emitting device so as to light the linear light source. The provision of a single connector facilitates connection to a lighting device.

In addition, the connector is preferably provided with a first connecting piece provided near the one end in the longitudinal direction of the linear light source, and a second connecting piece provided at the other end in the longitudinal direction of the linear light source. If the connector is provided only in the vicinity of one end in the longitudinal direction of the linear light source, the connector maintains the linear light source in one side supporting state and is unstable, but it can be stabilized by providing the connector near both ends of the linear light source.

The present invention relates to a light emitting device comprising a device body and a light source provided in the device body, comprising the light source unit as the light source, the light source unit being detachable from the device body. It is characterized by being installed. According to this light emitting device, a plurality of linear light sources can be exchanged together in a light source unit unit.

In another aspect, the present invention relates to a light emitting device, comprising a device body, a light source provided on the device body, and a reflector for reflecting light of the light source, wherein the light source unit is used as the light source. And the reflecting plate is interposed between the device body and the connector of the light source unit. The reflecting plate may need to be replaced due to yellowing (yellowing) or the like. According to this light emitting device, the reflecting plate can be easily disassembled by disassembling the light source unit from the main body of the device.

EMBODIMENT OF THE INVENTION Hereinafter, the preferred embodiment of this invention is described based on drawing. Here, as an example of a light emitting device, a shaukasten for observing an X-ray film will be described as an example. The shaukasten 1 is provided with a plurality of light source units 3 in the apparatus main body 2.

As shown in FIG. 1, the apparatus main body 2 is provided with the casing 5 in which the light source unit 3 is installed, and the light emitting surface structure 6 detachably attached to the casing 5. As shown in FIG. As shown in FIG. 2, the apparatus main body 2 is provided with a support 7 for allowing the apparatus main body 2 to stand on its own so that the light emitting surface is in the horizontal direction (left direction in FIG. 2).

As shown in FIG. 3, the casing 5 has a rectangular bottom portion 8 and side portions 9a, 9b, 9c, 9d set up around the bottom portion 8. At the same time, one surface (front face) is an opening and is formed in the form of a box of the front opening. Incidentally, in the drawing, the side surfaces indicated by the reference numerals 9a and 9b are the long side, and the side surfaces indicated by the reference numerals 9c and 9d are the short side.

The light emitting surface construct 6 is mounted to the casing 5 as if covering the front opening of the casing 5 (see FIG. 1). The light emitting surface member 6 is formed by attaching a frame 12 to the periphery of the diffuser plate 11 serving as a light emitting surface. The diffuser plate 11 diffuses and transmits light from the light source 3 behind to form a light emitting surface. The diffusion plate 11 is formed in a rectangular shape and becomes a rectangular light emitting surface.

The diffuser plate 11 is a white transparent glass or synthetic resin product. On the other hand, the frame 12 is formed in a rectangular frame shape as a metal product, and reinforces the diffuser plate 11 at the periphery of the diffuser plate 11. In addition, the frame 12 is attached to the casing 5 by screws 53 or the like described later, and the frame 12 also functions as an attachment body of the diffusion plate 11.

The frame 12 is provided with an X-ray photographic fixture 14, and the X-ray photograph can be kept mounted on the diffusion plate 11 serving as a light emitting surface. Specifically, by inserting an X-ray photograph between the X-ray photographic fixture 14 and the diffuser plate 11, the X-ray photograph is interposed and held so that a plurality of X-ray photographs can be positioned side by side.

3 shows a state when the light source unit 3 is removed from inside the casing 5. The bottom reflector 16 and the light source lighting devices 17a-1, 17a-2, 17b-1, 17b-2 are provided in this casing 5 inside.

The bottom reflector 16 is for reflecting the light irradiated from the light source 3 to the rear (casing bottom side) to the front (diffusion plate side), and is divided into a plurality of white plates (including sheet-shaped ones). It consists of sieves 16a and 16b. Here, one large rectangular reflector plate area is formed side by side with two rectangular partitions 16a and 16b formed by a sheet of a flexible synthetic resin product, but the number of partitions is not particularly limited. Instead, the reflective plate 16 may be formed of one large plate-shaped member. The size of the entire reflector 16 substantially corresponds to the size of the diffuser plate 11.

The reflecting plate 16 (or the region in which the reflecting plate is provided: the reflecting plate region) is one step smaller than the bottom of the casing 5. That is, the area (sum of the areas of the splitters 16a and 16b) of the reflecting plate 16 is smaller than the area of the casing bottom 8 and the area where the reflecting plate 16 is not disposed at the periphery of the bottom 8. (19a, 19b, 19c, 19d) are secured. The reflector non-located regions 19a, 19b, 19c, and 19d are respectively secured between each inner surface of the casing side portions 9a, 9b, 9c, and 9d and the periphery of the reflector 16, and the reflector non-located regions 19a. , 19b, 19c, and 19d have a rectangular frame shape. Hereinafter, one side (lower side in FIG. 3) of the pair of long side side reflecting plate non-arrangement areas 19a and 19b is made into the 1st reflecting plate non-arrangement area 19a, and the corresponding long side side reflecting plate non-arrangement area 19a is shown. And 19b), the other (upper side in FIG. 3) is used as the second reflector non-arrangement region 19b.

The lighting devices 17a-1, 17a-2, 17b-1, 17b-2 are for lighting the cold cathode tube (to be described later) of the light source unit 3, and as shown in FIG. 4, the circuit board 21 The main part is mounted on one surface 21 a of the () side with an electric component (coil, capacitor, resistor, etc.) constituting a lighting device or the like. This lighting device turns on the light source 3 at a high frequency of about 10 kHz to 60 kHz as an inverter system. When the fluorescent lamp is turned on at a high frequency, the light emission efficiency is improved.

Four lighting devices 17a-1, 17a-2, 17b-1, and 17b-2 are provided corresponding to the number of the light source units (four) and are arranged in the reflector non-arrangement areas 19a and 19b. Specifically, as shown in FIG. 3, two lighting devices (hereinafter referred to as first lighting devices) 17a-1 and 17a-2 are disposed in the first reflecting plate non-arrangement area 19a and the other two Two lighting devices (hereinafter referred to as second lighting devices) 17b-1 and 17b-2 are disposed in the second reflecting plate non-arrangement region 19b.

Each lighting device 17a-1, 17a-2, 17b-1, 17b-2 has the bottom part 8 so that the strip | belt-shaped circuit board 21 may follow the casing side part 9a (or 9b) in parallel. It is attached to the casing 5 in a standing shape (vertical arrangement shape) with respect to (refer also FIG. 15). And the board | substrate 21 is being fixed with the screw etc. with respect to the installation stay 24 formed in the casing 5.

Moreover, the board | substrate 21 opposes the surface 21a in which the electric component 22 is mounted, and the opposite surface 21b opposes the inner surface of the side part 9a (or 9b) at predetermined intervals. Moreover, the surface 21a in which the electrical component 22 is provided is provided so that it may face the light source unit 3. As shown in FIG.

The lighting device 17 is provided with output connector portions 25a and 25b serving as output terminals of the lighting device 17. The output terminal has a high pressure side (HOT side) and a low pressure side (COLD side), and the connector portion 25a on the high pressure side corresponds to the number corresponding to the number of linear light sources 30 to be described later constituting the light source unit 3 ( Six) and only one connector part 25b of the low pressure side is provided. And the low pressure side output becomes an earth connection. Moreover, all the connector parts 25a and 25b are provided in the surface 21a in which the electrical component 22 is provided, and are arrange | positioned so that it may face the light source unit 3.

The main wiring 26 for supplying electric power to each lighting device 17a-1, 17a-2, 17b-1, 17b-2 is also arrange | positioned at the said reflection board non-arrangement area | region 19a, 19b, 19c (FIG. 3). This main wiring 26 extends from the power supply switch 27 (refer FIG. 2) provided in the casing side part 9b to the inside of the casing 5, and is arrange | positioned. Specifically, the wirings are routed from the reflecting plate non-aligning region 19a to the reflecting plate non-aligning region 19b through the reflecting plate non-aligning position region 19c. The main wiring 26 passes through the space between the respective lighting devices 17a-1, 17a-2, 17b-1, 17b-2 and the casing side portions 9a, 9b, and lights up with the light source unit 3. It does not disturb the wire 46 described later for connecting the device (see FIG. 15). The main wiring 26 is provided with branch lines 28 branched so as to be connected to the respective lighting devices 17a-1, 17a-2, and 17b-1, and the lighting devices are connected in parallel with each other. The main wiring 26 is also connected to a power cable (not shown) that extends outside the apparatus main body 2 via the power switch 27.

In this embodiment, since the lighting device and the main wiring 26 are disposed in the reflector non-arranged regions 19a, 19b, 19c, and 19d, and there is no lighting device or the main wiring 26 on the reflecting plate 16, When the light emitting surface member 6 and the light source unit 3 are removed from the casing 5 as shown in Fig. 3, the reflecting plate 16 can be easily detached without being disturbed by the lighting device or the main wiring 26. The deterioration of the reflecting plate 16 is easy.

FIG. 5 shows the light source unit 3 mounted on the apparatus main body 2 (casing 5 of). The light source unit 3 integrates a plurality of (six) linear light sources 30 in the connector 31 so that the plurality of linear light sources 30 can be integrally attached to and detached from the casing.

The linear light source 30 is a straight tubular fluorescent lamp, more specifically a cold cathode tube. The cold cathode tube has a longer life compared to the hot cathode tube used as a general fluorescent lamp. In addition, the hot cathode tube has a tube diameter of 20 to 40 mm, so that it is difficult to narrow the tube diameter in structure, whereas the cold cathode tube can narrow the tube diameter in structure. Therefore, the light source unit 3 can be simplified, and further, the thickness of the apparatus main body 2 can be made thin. And it is preferable to use about 2-6 mm as a diameter of a cold cathode tube.

As shown in FIG. 6A, the cold cathode tube 30 is provided with electrodes 34a and 34b at both ends in the longitudinal direction inside the tube body 33 in which gas is sealed. Moreover, the lead terminal 35 extends out of the tube main body 33 from these electrodes 34a and 34b. In addition, in the vicinity of the electrodes 34a and 34b of the cold cathode tube 30, the non-effective light emitting regions E2 and E2 that are darker than the effective light emitting region E1 in the middle portion of the longitudinal direction of the cold cathode tube 30, even when turned on. )

As shown in FIG. 6B, the cold cathode tube 30 is provided with a heat insulating material 37 so as to cover both ends in the longitudinal direction. The heat insulating material 37 is fitted to the tube main body 33 so as to almost cover the electrodes 34a and 34b with a silicone rubber product, and the other members (even if the electrodes 34a and 34b generate heat and the temperature becomes high) In particular, the connector 31 is protected from heat transfer. The silicone rubber constituting the heat insulating material 37 is not only flame retardant but also electrically insulating, and thus functions as an insulator for the connector 31 and the like.

In addition, since the cold cathode tube 30 is held by the connector 31 through the heat insulating material 37, the heat insulating material 37 also functions as a holder for such holding. The groove 38 is formed in the silicone rubber 37 to function as a holder.

The plurality of cold cathode tubes 30 are arranged side by side at predetermined intervals in the direction perpendicular to the cold cathode tubes longitudinal direction, and both ends in the longitudinal direction of each cold cathode tube 30 are connected to each other by the connector 31 in this state.

The connector 31 is provided with a first connecting piece 40 provided on one end side of the cold cathode tube 30 in the longitudinal direction (insulation material 37; the holding member), and a heat insulating member of the other end side in the longitudinal direction of the cold cathode tube 30 ( 37) It is comprised by the 2nd connection piece 41 provided in the holding body). By holding at both ends of the cold cathode tube 30 in the longitudinal direction, the holding state of the some cold cathode tube 30 becomes stable. In addition, since the connecting pieces 40 and 41 are provided in the ineffective light emitting area E2 of the cold cathode tube 30, even if the connecting pieces 40 and 41 are attached, light emission of the cold cathode tube 30 is not impaired.

Each of the connecting pieces 40 and 41 is formed in a strip-like plate made of a metal product, and each of the connecting pieces 40 and 41 has a light source attachment portion 43 corresponding to the original number of the cold cathode tubes 30. Further, screw holes 42b for attaching the connecting pieces 40 and 41 to the casing 5 with the screws 42a are formed at both ends in the longitudinal direction and the intermediate portion of each of the connecting pieces 40 and 41. Moreover, the threaded hole 42c for the screw 42a is also formed in the reflecting plate 16 and the casing 5 (refer FIG. 3).

The light source attachment part 43 is provided in the longitudinal direction of the connection piece 40 and 41 at predetermined intervals. As shown in FIG. 7A, each light source attachment portion 43 has a pair of raised jaws 44 and 44, and the one raised jaw 44 has a narrow neck portion (a narrowed portion) 44a at its upper portion. ) Is formed and the upper portion of the neck 44a becomes the fixing piece 44b.

As shown in FIG. 7B, the lifting jaw 44 is inserted into the grooves 38 and 38 formed in the holding body 37, and the neck 44a of the one rising jaw 44 is bent to the fixing piece 44b. By fixing the holding body 37, the cold cathode tube 30 is positioned and fixed to each of the connecting pieces 40 and 41. The cold cathode tube 30 can also be disassembled from the connecting pieces 40 and 41 by restoring the warp of the neck 44a. That is, each cold cathode tube 30 can be disassembled separately from the connector 31.

An electric wire 46 is connected to each lead terminal 35 on the side of the first connecting piece 40 of each cold cathode tube 30, and a connector portion 47 is provided at each end of each electric wire 46. This connector portion 47 is connected to the output connector portion 25a on the high voltage side of the lighting device 17. Therefore, the electrode 34a on the side of the first connecting piece 40 becomes a high voltage side electrode.

As shown in FIG. 8, a strip-shaped conductive plate 48 is provided at an end (retainer 37) on the side of the second connecting piece 41 of the cold cathode tube 30. The conductive plate 48 is fixed to each lead terminal 35 on the second connecting piece 41 side of the plurality of cold cathode tubes 30 by soldering 48a or the like, and is formed on the second connecting piece 41 side. The lead terminals 35 are in an electrically connected state with each other. One electric wire 49 is connected to the said conductive plate 48, and the connector part 50 is provided in the front-end | tip of this electric wire 49. As shown in FIG. The connector portion 50 is connected to the output connector portion 25b on the low pressure side of the lighting device 17. Therefore, the electrode 34b on the side of the second connecting piece 40 becomes a low pressure side electrode. Moreover, since the single low voltage side connector part 50 is provided with respect to the plurality of cold cathode tubes 30, wiring is simple and connection is easy.

FIG. 9 shows a state where a plurality (four) light source units 3 are provided in the casing 5 of FIG. 3. Each light source unit 3 is disposed at a position overlapping with the reflecting plate 16, and the reflecting plate 16 is located behind the light source unit 3. Each light source unit 3 is attached to the casing 5 by screws 42a, and can be attached and detached separately. Since the linear light source 30 can be attached or detached in units of the light source unit 3, the plurality of linear light sources 30 can be replaced at once.

Here, each light source unit 3 is formed in a size substantially corresponding to the size of one X-ray photograph. On the other hand, the diffuser plate (light emitting surface) 11 is formed in such a size that a plurality of X-ray photographs can be arranged, and a plurality of light source units 3 are provided corresponding to the size of the diffuser plate 11. In addition, since the light source unit 3 is connected in the state which connected several linear light source 30 in parallel, the whole shape is square shape.

As described above, since the linear light sources 30 are exchanged in units of the light source units, the luminance of the linear light sources 30 in one light source unit 3 is easily aligned, and one light source unit on the light emitting surface 11 ( In the range of light emission by 3), almost uniform luminance is ensured. And since the range which light-emits by one light source unit 3 is planar shape which has a fixed range, reading of an X-ray photograph can be performed correctly. In addition, since the size of one light source unit 3 (range to emit light) corresponds to the size of the X-ray photograph, even if there is a luminance difference between the light source units 3, By aligning the X-ray photograph with each other, reading can be performed in a state where there is almost no luminance unevenness.

In addition, although the reflecting plate 16 is simply mounted in the casing bottom part 8 in the state shown in FIG. 3, the connector 31 (connection piece 40 is attached by attaching the light source unit 3 to the casing 5). 41) and the casing bottom portion 8 are interposed with the reflecting plate 16 interposed therebetween so that the reflecting plate 16 is fixed to the casing 5. Therefore, by disassembling the light source unit 3 by removing the screw 42a, the reflecting plate 16 can be disassembled from the casing 5.

Each light source unit 3 is arranged in the casing 5 in the direction orthogonal to the longitudinal direction of the linear light source 30. In addition, since four light source units 3 are provided, a total of 24 linear light sources 30 are provided, but adjacent linear light sources (including the interval of the linear light sources 30 between the adjacent light source units 3) The intervals between 30 are the same.

Each light source unit 4 is placed side by side so that the direction of the longitudinal direction is reversed with respect to the adjacent light source unit 3. That is, in the leftmost light source unit 3-1 in FIG. 9, the first connecting piece 40 is disposed on the side of the first reflecting plate non-located region 19a (lower side in FIG. 9), and the second connecting piece ( 41 (and the electrically conductive plate 48) is arrange | positioned at the 2nd reflecting plate non-arrangement area | region 19b side (upper side in FIG. 9). Therefore, the cold cathode tube electrode 43a to which the high pressure side connector 47 is connected is located on the side of the 1st reflector non-arrangement area | region 19a, and the cold cathode tube electrode 43b to which the low pressure side connector 50 is connected is made into the 1st side. 2 is on the side of the non-locating region 19b of the reflecting plate.

The light source unit 3-2 on the right side of the light source unit 3-1 has a direction in the longitudinal direction opposite to the light source unit 3-2 so that the first connecting piece 40 has a second non-aligning region ( It is arrange | positioned at the side of 19b, and the 2nd connection piece 41 (and the conductive plate 48) is arrange | positioned at the 1st reflecting plate non-arrangement area | region 19a side. Therefore, the cold cathode tube electrode 43a connected to the high pressure side connector 47 is on the side of the second reflector non-located region 19b, and the cold cathode tube electrode 43b connected to the low pressure side connector 50 is made of 1 is on the side of the non-locating region 19a of the reflecting plate.

Further, the light source unit 3-3 on the right side of the light source unit 3-2 has the same direction as the light source unit 3-1 with the longitudinal direction opposite to the light source unit 3-2. Further, the light source unit 3-4 on the right side of the light source unit 3-3 (most right in FIG. 9) has the light source unit 3 in the longitudinal direction opposite to the light source unit 3-3. It is in the same direction as -2).

The lighting devices 17a-1, 17a-2, 17b-1, and 17b-2 light up each light source unit. As shown in FIG. 10, the first lighting device 17a-1 is a light source unit ( 3-1, the second lighting device 17b-1, the light source unit 3-2, the first lighting device 17a-2, the light source unit 3-3, the second lighting device 17b. -2) is connected to turn on the light source unit 3-4.

In addition, the lighting devices 17a-1, 17a-2, 17b-1, 17b-2 are positioned in the reflector non-arrangement regions 19a, 19b on the high-pressure side electrode 43a side of the cold cathode tube 30. It is arrange | positioned corresponding to the directionality of the unit 3. That is, the first lighting devices 17a-1 and 17a-2 are in the first reflecting plate non-located area 19a, and the second lighting devices 17b-1 and 17b-2 are the second reflecting plate non-locating area 19b. ) In other words, the first lighting devices 17a-1 and 17a-2 are at one end in the longitudinal direction of the cold cathode tube 30, and the second lighting devices 17b-2 and 17b-2 are connected to the cold cathode tube 30. It is on the other end side in the longitudinal direction.

The lighting device generates heat, but as described above, the heat generating source is dispersed by distributing the plurality of lighting devices in the plurality of reflecting plate non-locating regions 19a and 19b on both sides in the longitudinal direction of the cold cathode tube 30. The temperature rise can be prevented. In addition, since the brightness of the cold cathode tube decreases due to the rise in temperature, the fall of the brightness can be prevented by preventing the temperature rise. Further, by distributing the lighting devices, the lighting device can be installed even if the length of the lighting device is greater than the width of the light source unit 3.

Further, the respective lighting devices 17a-1, 17a-2, 17b-1, 17b-2 and the high voltage side electrode 43a of the cold cathode tube 30 lit by each lighting device are brought closer. 17a-1, 17a-2, 17b-1, 17b-2) are arrange | positioned in the longitudinal direction extended position of the light source unit lighted by the said lighting device. Thereby, the length of the electric wire 46 on the high voltage side can be shortened, and even if a high frequency current flows through the electric wire 46, leakage current can be reduced and power consumption can be reduced. Moreover, since the connector part 25a of the high voltage side output of a lighting device is provided in the one surface 21a side of the board | substrate 21 installed so that it may face the electrode 43 of cold cathode tube 30, the lighting device connector part The distance between the 25a and the cold cathode tube high pressure side electrode 43a can be shortened.

By placing the lighting device on the cold cathode tube high pressure side electrode 43a side, the lighting device and the cold cathode tube low pressure side electrode 43b are separated, but the wire 49 on the low pressure side is longer than the high voltage side wire 46. There is little leakage current, and the leakage current as a whole apparatus can be suppressed. In addition, since there is only one wire 49 on the low pressure side in one light source unit 3, the wiring is simple.

In addition, the wire 49 passes between the reflecting plate 16 and the casing bottom 8 so that the length of the low pressure side electric wire 49 is as short as possible. From the arrangement of the light source unit 3 and the lighting device shown, in the case where the electric wire 49 is not passed between the reflecting plate 16 and the casing bottom 8, the electric wire 49 is not disposed in the reflecting plate non-locating regions 19a and 19b. , 19c, 19d, or pass the wire 49 over the reflector plate 16. However, in the former, the electric wire 49 becomes long, and especially the electric wire 49 becomes very long with respect to the light source units 3-2 and 3-3. In the latter case, the electric wire 49 on the reflecting plate 16 becomes a shade and degrades the light emission quality. In contrast, this problem can be avoided by passing between the reflecting plate 16 and the casing bottom 8.

As shown in FIG. 11A, the reflecting plate 16 on the casing bottom 8 is flat if the wire 49 does not pass, but the portion through which the wire 49 passes as shown in FIG. 11B. In 16-1, since the reflecting plate 16 is a flexible sheet body, the reflecting plate 16 is deformed into a bulging shape toward the cold cathode tube 30 side.

Here, the distance between the reflecting plate 16 and the cold cathode tube 30 when the reflecting plate 16 is not deformed is L1, and the distance between the reflecting plate 16 and the cold cathode tube 30 when the reflecting plate 16 is deformed. If L2 is set to L2, L2 becomes smaller than L1 due to the deformation of the reflecting plate 16. In this embodiment, even when the reflecting plate 16 is deformed by the electric wire 49, the tip of the bulge 16-1 of the sheet body 16 is located behind the cold cathode tube 30 (casing bottom side), and the reflecting plate 16 ) And the cold cathode tube 30 is spaced apart from the reflecting plate 16 so as to secure a distance L2 between the cold cathode tube 30 and the cold cathode tube 30. If the gap L2 is not secured at the time of deformation of the reflector, the reflector 16 is in contact with the cold cathode tube 30, and the luminous quality is deteriorated. Can be prevented.

In order to ensure a relatively large distance L1, the heat insulating material (retainer) 37 provided at both ends in the longitudinal direction of the cold cathode tube 30 may be increased or the thickness of the connecting pieces 40 and 41 may be increased.

FIG. 12 shows a rear view of the light emitting surface constructer 6, and side reflectors 51a, 51b, 51c, 51d are provided on the back side (inner side) of the frame 12 of the light emitting constructer 6. The side reflecting plates 51a, 51b, 51c, 51d are located on the side of the linear light source 30 in the casing 5 and directly from the light source 30 when the light emitting surface construct 5 is mounted to the casing 5. This is for reflecting to the diffuser plate 11 side irradiated to the side without facing the diffuser plate 11. The side reflecting plates 51a, 51b, 51c, and 51d are made of metal, and the surface of the linear light source 30 side is painted white.

The side reflectors 51a, 51b, 51c, 51d are provided on all four sides of the frame 12 having a rectangular frame shape, and a pair of (long sides) side reflectors (long sides) located on both sides in the longitudinal direction of the linear light source 30 ( A pair of (short sides) side reflectors 51c, 51d connecting 51a, 51b and both ends of each side reflector 51a, 51b, respectively, and a rectangular frame as a whole of the side reflectors 51a, 51b, 51c, 51d. It has a shape (see FIGS. 13 and 14).

As shown in FIG. 15, the side reflectors 51a, 51b, 51c, 51d are being fixed by the screw 53 to the rear side of the frame 12. As shown in FIG. The diffusion plate 11 is also fixed to the frame 12 by the screw 53.

When the light emitting surface structure 6 with side reflectors is mounted on the casing 5, the side reflectors 51a, 51b, 51c, 51d extend from the frame 12 to the vicinity of the reflector 16, and the casing 5 The light emitting chamber 55 surrounded by the diffusion plate 11, the reflecting plate 16, and the side reflectors 51a, 51b, 51c, and 51d is formed in the inner side. As for the light source unit 3, most of the longitudinal direction (near the connecting pieces 40 and 41) (effective light emitting area Bl) is located in the light emitting chamber 55. The tip 56 in the extending direction of the side reflectors 51a, 51b, 51c, and 51d is in a floating state without contacting the reflecting plate 16 of the casing bottom 8, and the reflecting plate 16 is attached to the side reflector. Is prevented from being damaged, and furthermore, the degradation of emission quality due to damage to the reflector 16 is prevented.

Reflector non-arrangement areas 19a, 19b, 19c, 19d of the rear space 57 (casing side portions 9a, 9b, 9c, 9d) of the side reflectors 51a, 51b, 51c, 51d, and casing bottom 8 ), The frame 12 and the space surrounded by the side reflectors 51a, 51b, 51c, and 51d), the lighting devices 17a-1, 17a-2, 17b-1, 17b-2, and the light source unit 3 The connector 31, the ineffective light emitting region B2 of the linear light source 30, the wiring 46, and the like are stored and isolated from the light emitting chamber 55. In particular, since the ineffective light emitting area B2 of the linear light source 30 is not located in the light emitting chamber 55, light emission nonuniformity does not arise in the light emitting chamber 55, and light emission quality improves.

In addition, the lighting devices 17a-1, 17a-2, 17b-1, 17b-2 generating heat, or the electrodes 34a, 34b at both ends in the longitudinal direction of the linear light source 30 are formed by the side reflector. Since it is located in the rear space 57 partitioned from 55, the temperature rise of the light emitting chamber 55 is suppressed. In addition, cooling of the rear space 57 itself is also ensured by the air holes 60 formed in the casing side portions 9a, 9b, 9c, and 9d. In addition, even when the outside air enters the casing from the air hole 60, since the outside air is difficult to enter the light emitting chamber 55 by the side reflector, it is possible to prevent a sudden change in temperature and to prevent luminance instability of the linear light source 30. can do.

Since the linear light source 30 is located over the light emitting chamber 55 and the rear space 57, the furnace for allowing the linear light source 30 to penetrate the side reflectors 51a and 51b on both sides in the longitudinal direction of the linear light source 30. Teeth 58 are formed corresponding to the number of linear light sources 30.

In addition, although the linear light source 30 spans the light emitting chamber 55 and the rear space 57 partitioned by the side reflector, when the light emitting surface structure 6 is removed, the side reflector disappears and the light source unit in the casing 5 is removed. (3) The whole is exposed and the light source unit 3 can be separated. In addition, the lighting device, the connector and the wiring flow are also exposed to enable the connector connection and the like. As described above, in the present embodiment, maintenance and inspection of the inside of the apparatus can be performed only by disassembling the light emitting surface structure 6.

In addition, this invention is not limited to the said Example.

According to the present invention related to the light source unit, a plurality of linear light sources are integrated, and a plurality of linear light sources can be attached and exchanged collectively.

In addition, when the plurality of linear light sources are provided with a single connector for low pressure side output, connection to the lighting device is facilitated.

In addition, when the connector consists of the first connecting piece and the second connecting piece, the light source unit is stable.

According to the present invention related to the light emitting device, a plurality of linear light sources can be collectively exchanged or the like in light source units.

In addition, when the reflecting plate is held between the device main body and the light source unit, the reflecting plate can be easily disassembled by disassembling the light source unit from the device main body.

Claims (5)

Light source unit mounted on the light emitting device, A plurality of linear light sources having electrodes at both ends in the longitudinal direction are connected by a connector in a state where they are arranged at a predetermined interval in a direction orthogonal to the longitudinal direction of the linear light source, and can be detachably integrally attached to the light emitting device. Light source unit characterized by the above-mentioned. The method of claim 1, And the plurality of linear light sources are provided with a single connector for connecting to the low pressure side output of the lighting device provided in the light emitting device to light the linear light source. According to claim 1, The connector includes a first connecting piece provided near one end of the linear light source in the longitudinal direction, and a second connecting piece provided at the other end of the linear light source in the longitudinal direction. With the device body, In the light emitting device having a light source provided in the main body of the device, A plurality of linear light sources having electrodes at both ends in the longitudinal direction as the light source are connected to the connector at a predetermined interval in a direction orthogonal to the longitudinal direction of the linear light source, and are integrally attached to and detached from the light emitting device. Equipped with a light source unit The light source unit is characterized in that the connector is detachably attached to the apparatus main body. With the device body, A light source provided in the apparatus main body, In the light-emitting device provided with the reflecting plate for reflecting the light of the said light source, A plurality of linear light sources having electrodes at both ends in the longitudinal direction as the light source are connected at the connector in a state in which they are arranged at a predetermined interval in a direction orthogonal to the longitudinal direction of the linear light source, and are integrated with the light emitting device. Equipped with a removable light source unit, And the reflecting plate is interposed and held between the device main body and the connector of the light source unit.