KR20060047679A - Light-emitting apparatus and liquid crystal display apparatus - Google Patents

Abstract

The present invention provides a light emitting device having low cost and a low cost and a liquid crystal display device using the same, even when the light emitting area is increased.

A frame 3 disposed behind the light emitting surface constituting member 4 and having a front opening 3a for allowing light from the lamp (light source) L to the light emitting surface constituting member 4 side; The reflection sheet 5 which is arrange | positioned behind the lamp L and reflects the light of this lamp L to the light emitting surface structural member 4 side is provided. Then, the reflective sheet 5 is supported by the frame 3 by attaching the reflective sheet 5 to block the rear opening 3b of the frame 3.

Description

Light-emitting apparatus and liquid crystal display apparatus

1 is a plan view showing a configuration example of main parts of a light emitting device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the II-II line of FIG. 1.

3 is an enlarged cross-sectional view taken along the line III-III of FIG. 1.

4 is a perspective view of the frame shown in FIG. 1.

It is a top view of the optical sheet provided in the liquid crystal panel side shown in FIG.

<Explanation of symbols for the main parts of the drawings>

1: light emitting device 2: front frame

2c: opening 3: frame

3a: front opening 3b: rear opening

31a, 32a: Front 32e: Lamp mounting hole (light source support)

32f: groove (support) 4: light emitting surface constituent member

41: lens sheet (optical sheet) 41a, 41b: hole

42 diffusion sheet (optical sheet) 42a, 42b: hole

5: reflective sheet 5a: front

5b: inclined side 5c: bent side (upper part)

6a, 6b: protrusion EP: liquid crystal panel

L: Lamp (Linear Light Source)

The present invention relates to a light emitting device and a liquid crystal display device using the same.

As a backlight of a liquid crystal display device, the direct type | mold light-emitting device which irradiates the light of the linear light source arrange | positioned behind a liquid crystal panel from the back of this panel, for example is used. In the direct type backlight, the linear light source is installed in a case made of a front frame in which a liquid crystal panel is disposed and a rear frame having a bottom shape having an open bottom at one end thereof. In addition, the front surface of the rear frame is equipped with a reflection sheet for reflecting the light of the linear light source toward the panel side, as described, for example, in Japanese Patent Laid-Open No. 2002-258770. Improved use efficiency.

However, in the conventional apparatus as described above, since the reflective sheet is mounted on the front surface of the rear frame and supported by the rear frame, there is a problem that it is difficult to reduce the weight of the rear frame and thus the light emitting device. In particular, when the light emitting area of the light emitting device is enlarged in order to cope with the large screen of the liquid crystal panel, the front area of the rear frame needs to be increased in proportion to it, so that the weight of the rear frame and the light emitting device depends on the light emitting area. Therefore, the increase could not be suppressed. In addition, such an increase in the weight of the rear frame not only increases the material cost of the rear frame, but also requires a significant reinforcement of the structure of members such as the front frame other than the light emitting device, resulting in an increase in the cost. there was.

In view of the above-mentioned problems, the present invention has an object to provide a light emitting device that can reduce the weight even when the light emitting area is enlarged and has a low cost, and a liquid crystal display device using the same.

The light emitting device of the present invention is a light emitting device having a light source and a light emitting surface constituting member disposed in front of the light source and constituting a light emitting surface, which is disposed behind the light source, and is disposed on the light emitting surface constituting member side. A reflective sheet for reflecting light; And a frame disposed at a rear side of the light emitting surface constituent member and provided with a front opening portion and a rear opening portion for allowing passage of light of the light source toward the light emitting surface constituting member side, wherein the reflective sheet blocks the rear opening portion. It is characterized in that which is mounted to the frame.

In the light emitting device configured as described above, at the same time as using the frame having the front opening portion and the rear opening portion, a reflective sheet is attached to the frame so as to block the rear opening portion of the frame. Thereby, compared with the said prior art example which used the rear frame which has a front surface, even if it enlarges a light emitting area, the weight increase in the said frame on which the reflective sheet is attached and supported can be suppressed. In addition, since the weight increase in the frame can be suppressed, the increase in the material cost can be suppressed as compared with the conventional example.

Further, in the above light emitting device, the reflective sheet has a flat side, and the inclined side surface formed by bending the front face at which the light source is disposed in front and at least two opposite sides of the front face at an inclination angle of less than 90 °, respectively. At the same time, the reflective sheet is preferably mounted on the frame by its inclined side is fixed to the frame.

In this case, the angle with respect to the front surface of the inclined side is changeable and the front surface is spaced apart from the frame, so that the reflective sheet is installed on the frame and is applied to the reflective sheet by heat or moisture absorption from the light source. Even when deformation occurs, the angle can be changed according to the deformation, so that the deformation can be absorbed while keeping the front face flat. Therefore, the fall of the function resulting from the said deformation | transformation can be prevented from occurring in a reflection sheet.

Further, in the above light emitting device, the frame may be provided with a supporting portion for contacting and supporting at least the rear surface of the reflective sheet.

In this case, the reflection sheet is attached to the frame while preventing the sag caused by its own weight from being prevented by the supporting portion, whereby the degradation of the reflection function caused by the sag of the sheet can be prevented.

In the above light emitting device, it is preferable that a projection is inserted into the frame and inserted into a hole formed in the light emitting surface constituting member on the front surface surrounding the front opening.

In this case, the frame can support the light emitting surface constituent member placed on its front surface in a movable state, so that the deformation can be absorbed from the hole even when the light emitting surface constituent member is deformed due to heat or moisture absorption. The fall of the light emission quality resulting from this deformation | transformation, etc. can be prevented.

In the above light emitting device, it is preferable that the light source is constituted by a linear light source, and a light source support part supporting both ends of the linear light source is provided in the frame.

In this case, since the linear light source is supported by the light source support portion provided in the frame, the installation of the support member for supporting the linear light source in the light emitting device can be omitted, thereby reducing the number of parts of the light emitting device.

Further, in the above light emitting device, the light emitting surface constituent member includes an optical sheet on the surface, and is disposed in front of the light emitting surface constituent member and provided with an opening for allowing passage of light from the light emitting surface to the outside. It is preferably provided with a frame, and one side of the optical sheet is fixed to the inside of the front frame.

In this case, even when a deformation due to heat or moisture absorption occurs in the optical sheet, in the optical sheet, portions other than one side fixed inside the front frame can move to absorb the deformation. It can prevent that the function of an optical sheet falls.

In the above light emitting device, the frame may be of an integral structure.

In this case, a frame having high rigidity and excellent strength can be easily configured.

Moreover, the liquid crystal display device of this invention is a liquid crystal display device provided with the liquid crystal panel and the backlight which irradiates light to this liquid crystal panel, The said light emitting device was used as said backlight, The large liquid crystal Even when a panel is used, a light weight and low cost liquid crystal display device can be easily constructed.

EMBODIMENT OF THE INVENTION Hereinafter, the preferable Example which shows the light emitting device of this invention is described with reference to drawings. In addition, in the following description, the case where it applies to the backlight of a liquid crystal display device is demonstrated as an example.

1 is a plan view showing an exemplary configuration of main parts of a light emitting device according to an embodiment of the present invention, and FIGS. 2 and 3 are enlarged cross-sectional views of line II-II and III-III, respectively. In the drawing, the light emitting device 1 of the present embodiment includes a plurality of (e.g., 8) as the front frame 2, the frame 3 disposed in the front frame 2, and the light source supported by the frame 3; Lamps L). In addition, the light emitting device 1 includes a light emitting surface constituting member 4 disposed in front of the lamp L to constitute a light emitting surface, and disposed behind the lamp L to emit light of the lamp L. FIG. The reflection sheet 5 which reflects to the surface constituent member 4 side is provided. In the light emitting device 1, the liquid crystal panel EP of the liquid crystal display device is arranged on the front frame 2, and the light emitting device 1 has a lamp L behind the panel EP. It is a so-called direct type backlight arranged. In addition, in the following description, the lateral direction (left-right direction of FIG. 1) of rectangular liquid crystal panel EP is made into a long side direction, and the longitudinal direction (up-down direction of FIG. 1) of copper panel EP is made. It demonstrates in the short side direction.

The front frame 2 is integrally formed using, for example, resin or metal, and is disposed in front of the light emitting surface constituting member 4 to support the liquid crystal panel EP, and the light of the light source to the liquid crystal panel EP is supported. It is configured to allow investigation of. That is, the front frame 2 is formed in the L-shaped cross section which has the front surface 2a provided in frame shape, and the side surface 2b (FIG. 2) provided at right angles with respect to the outer edge part of this front surface 2a, The panel EP is supported by (2a) in the state where the edge edges of the four sides of the panel EP are arranged.

In addition, the front frame 2 is formed with an opening 2c (FIG. 2) surrounded by the front surface 2a inside the front surface 2a. The opening 2c is formed along the effective screen area of the panel EP, and is configured to allow passage of light of the light source from the light emitting surface to the panel EP (outside). In the liquid crystal display device, the light of the light source passing through the light emitting surface constituent member 4 and the opening 2c sequentially enters the panel EP so that a desired image is formed on the entire surface of the panel.

The frame 3 is integrally formed of resin or metal, and is disposed behind the light emitting surface constituting member 4. 4, this frame 3 has a front opening 3a which allows passage of the light of the lamp L to the light emitting surface constituent member 4 side, and a rear opening which is blocked by the reflecting sheet 5. As shown in FIG. Has (3b) In addition, the frame 3 is configured to support the front frame 2 and the liquid crystal panel EP disposed therein. The frame 3 also includes a lamp L, a light emitting surface constituting member 4, and reflections. A supporting function for supporting the sheet 5 is provided.

For example, as shown in FIG. 2, the light emitting surface constituting member 4 and the reflective sheet 5 are respectively attached to the frame 3 so as to block the front opening portion 3a and the rear opening portion 3b. The light of the lamp L disposed inside the frame 3 is collected toward the front opening 3a, and the liquid crystal panel EP is provided through the light emitting surface constituting member 4 in a state in which the utilization efficiency of the light of this light source is increased. It is supposed to be emitted to the side. That is, in the frame 3, when the light emitting surface constituent member 4 and the reflective sheet 5 are mounted, the frame 3 can prevent the light of the light source from being emitted outside the panel EP as much as possible. It is configured to.

Specifically, the frame 3 is preferably made of a synthetic resin having stability against heat, light, impact such as polycarbonate, vinyl chloride, acrylic, ABS, or metal such as aluminum, stainless steel, steel sheet, magnesium alloy, or the like. Formed.

In addition, the frame 3 has two long side frame portions 31 and a short side frame portion 32 which are disposed in the long side direction and the short side direction, respectively, in the front frame 2, and one and the other long side frame portions ( One end portion and the other end portion of one short side frame portion 32 are continuously provided at one end portion of 31), and the other short side frame portion 32 is provided at the other end portion of one and the other long side frame portion 31, respectively. One side end part and the other end part of the structure are comprised in the frame shape of the structure which the four sides integrally provided respectively.

As shown in FIG. 2, the long side frame part 31 is formed to be parallel to each other at the same time as orthogonal to these front surfaces 31a and rear surfaces 31b and the front surfaces 31a and rear surfaces 31b formed parallel to each other. It has the outer side surface 31c and the inner side surface 31d, and is comprised in the shape which is rectangular in cross section. In addition, the reflection sheet 5 is fixed to the inner side surface 31d of the long side frame portion 31 by the double-sided tape 8, and the frame 3 acts as a supporting member of the reflection sheet 5. (Details will be described later).

On the other hand, as shown in Figure 3, the short side frame portion 32 has a front surface (32a) and a rear surface (32b) formed in parallel with each other, and an outer side surface (orthogonal to the front surface (32a) and the rear surface (32b) installed) 32c and an inner side surface 32d which is formed to be inclined with respect to the front surface 32a and the rear surface 32b and is not parallel to the outer side surface 32c, and has a wedge-shaped cross section. In addition, the short side frame portion 32 is provided with a lamp mounting hole 32e as a light source support portion formed to penetrate through the outer side surface 32c and the inner side surface 32d, and both ends of each lamp L are provided with the mounting hole ( The frame 3 can be held for each lamp L by being fitted in 32e). Moreover, the groove part 32f parallel to the short side direction is provided in the inner side surface 32d, The front edge of the reflection sheet 5 mentioned later is inserted, and this groove part 32f functions as a support part of the reflection sheet 5 It is supposed to be done.

Moreover, in the frame 3, the said front opening part 3a enclosed by these front surfaces 31a and 32a is formed inside the front surfaces 31a and 32a of the long side frame part 31 and the short side frame part 32, The rear openings 3b surrounded by these rear surfaces 31b and 32b are formed inside the rear surfaces 31b and 32b of the long side frame portion 31 and the short side frame portion 32.

In addition, the front surfaces 31a and 32a are surfaces directly in contact with and supporting the edges of the four sides of the light emitting surface constituting member 4, and as illustrated in FIG. 4, the two projections 6a and 6b have the front surfaces 31a. And 32a). These protrusions 6a and 6b are inserted into a hole to be described later formed on the light emitting surface constituting member 4 side to pass through, and the frame 3 is configured to support the constituent member 4 in a movable state. .

The light emitting surface constituent member 4 is composed of a plurality of planar optical sheets, for example, a lens sheet 41 and a diffusion sheet 42, and the lens sheet 41 is emitted from the light emitting surface. In addition to increasing the luminance of the light of the planar light source, the diffusion sheet 42 makes the luminance of the planar light almost uniform to adjust the light emitting quality of the light emitting device 1. In addition, the lens sheets 41 and the diffusion sheet 42 are provided with holes 41a and 42a through which the protruding portions 6a are inserted at the edge ends in the long side direction, and the protruding portions 6b at the edge ends in the short side direction. Holes 41b and 42b through which the holes are inserted are provided. The opening dimensions of each of the holes 41a to 42b are determined to have a long ellipse shape as illustrated in the drawing in consideration of shrinkage (deformation) due to heat or water absorption in the corresponding sheet material or the like.

In the light emitting surface constituent member 4, the lens sheet 41 and the diffusion sheet 42 are not fixed to the frame 3, and only one side of the lens sheet 41 is forwarded by the double-sided tape 7. It is fixed to the frame 2. That is, in the light emitting surface constituent member 4, the diffusion sheet 42 and the lens sheet 41 are placed on the frame 3 in a state where the projections 6a and 6b corresponding to the holes 41a to 42b are caught. They are placed in the frame 3 by being placed in order. In the lens sheet 41, the double-sided tape 7 is adhered to the edge of the left short side of the front surface 41c, as shown by the oblique line in FIG. 5, and through the double-sided tape 7. The lens sheet 41 is fixed to the inside of the front frame 2.

With the above configuration, in the lens sheet 41, the three remaining sides other than the left short side fixed to the inside of the front frame 2 when the deformation occurs move on the diffusion sheet 42 with respect to the front frame 2. As a result, the deformation is absorbed, and the deformation is absorbed in the holes 41a and 41b with respect to the frame 3. In addition, the diffusion sheet 42 is allowed to move between the frame 3 and the lens sheet 41, so that deformations generated in the holes 42a and 42b are absorbed. Therefore, the warpage by the said deformation | transformation can be prevented in the lens sheet 41 and the diffusion sheet 42, and generation | occurrence | production of the functional fall in each of these sheets 41 and 42 can be prevented.

In addition to the above description, the light emitting surface constituting member 4 may be configured to include a plurality of optical sheets having other functions or the same function, such as a polarizing sheet. Instead of the diffusion sheet 42, a diffusion plate made of synthetic resin such as acrylic resin, polycarbonate resin, opaque glass, or the like may be included in the light emitting surface constituting member 4. However, since the diffusion plate is thicker and heavier than the diffusion sheet 42, it is preferable to use the diffusion sheet 42 in terms of weight reduction of the light emitting device 1.

In addition, in the above description, the case where one side of the lens sheet 41 is fixed to the front frame 2 using the double-sided tape 7 has been described, but the fixing method of the light emitting surface constituting member 4 is limited thereto. If the liquid crystal panel is small, for example, 15 inches or less (the amount of heat generated by the lamp L or the like is small) and the deformation amount of the light emitting surface constituent member 4 is expected to be sufficiently small due to the use environment of the light emitting device 1 or the like, In addition, all four sides of the structural member 4 may be fixed to the front frame 2 and / or the frame 3. In addition, when fixing two sides of the light emitting surface constituting member 4, it is preferable to fix two side sides perpendicular to each other (for example, the left short side and the upper long side). In addition, as mentioned above, when fixing one side of a sheet | seat, as shown in FIG. 5, it is preferable to fix the short side which is small in deformation amount compared with the long side. However, in the case where the light emitting surface constituent member 4 for the large-sized liquid crystal panel EP, which is relatively heavy, is used, only the long side of the upper side of the panel EP opposite to the direction in which gravity acts is fixed. It's okay.

The reflecting sheet 5 has a front surface 5a which is flat, and each lamp L is disposed above the front surface 5a. In addition, as shown in FIG. 2, the reflective sheet 5 has an inclined side surface 5b continuously formed so as to be inclined with respect to the front surface 5a only on the long side direction side, and a bent side surface continuous to the inclined side surface 5b. 5c is provided. That is, in this reflective sheet 5, the inclined side surface is bent upwardly at two inclined angles of less than 90 degrees out of four sides of the front surface 5a so as to be enlarged upward with respect to the front surface 5a. 5b is formed, and the said bending side surface 5c perpendicular | vertical to the front surface 5a is formed by bending the upper part of each inclined side surface 5b downward, for example. In the reflective sheet 5, when the bent side surface 5c is fixed to the inner side surface 31d of the frame 3 by the double-sided tape 8, as shown in FIG. 2, the front surface 5a ) And the inclined side surface 5b are mounted with respect to the frame 3 so as to block the rear opening 3b so that the front surface 5a is spaced apart from the long side frame portion 31 of the frame 3. In addition, since the vicinity of the bending of the front surface 5a and the inclined side surface 5b is not fixed, it is a free state, and in this reflective sheet 5, the frame (with the angle with respect to the front surface 5a of the inclined side surface 5b) can be changed. 3) is supported.

On the other hand, in the short side direction side of the reflective sheet 5, as shown in FIG. 3, the front surface 5a is not bent but the edge is inserted in the said groove part 32f of the frame 3, and this edge is the groove part 32f. By contacting with the inner surface of the), deflection and lifting are prevented from occurring in the reflective sheet 5. That is, the front edge on the short side direction side of the reflective sheet 5 is supported by its rear and front surfaces contacting the front inner surface and the rear inner surface of the groove portion 32f, so that the reflective sheet 5 is In addition to the fact that the long side direction is fixed to the long side frame portion 31, sagging and lifting of the front surface 5a due to its own weight can be prevented, and the deterioration of the light reflection function due to this can be prevented. Consists of. In addition, it is preferable to provide the groove portion 32f for guiding and supporting the front and rear surfaces of the front edge as the support portion for the reflective sheet, but to prevent sagging of the reflective sheet 5 by the support portion for guiding only the rear surface thereof. It is good also as a structure.

In addition, a sheet material having a low light transmittance is preferably selected for the reflecting sheet 5, and the light of the lamp L passes through the reflecting sheet 5 so as to be the rear side of the light emitting device 1 (liquid crystal panel EP). The other side of) is not leaked as much as possible. That is, the reflecting sheet 5 is comprised so that the leakage light to the said back side may be made as little as possible, and the fall of the brightness | luminance of the light on the surface emitted from the said light emission surface resulting from this leakage light may be prevented.

In addition to the above description, it is also possible to use a reflective sheet having a relatively high light transmittance, but in this case, it is preferable to color the back side of the reflective surface of the sheet in black or to provide an aluminum deposition film to absorb leakage light. .

The lamp L is a linear tube-shaped light source formed of, for example, a cold cathode tube. As illustrated in FIG. 2, two lamps L adjacent to each other are predetermined in the lamp spacer 12. It is arrange | positioned inside the frame 3 in the state of the pitch dimension being maintained.

As shown in Fig. 3, each lamp L is provided with a rubber holder 11 at electrodes provided at both ends thereof. An inverter 10 fixed to the mounting plate 9 mounted on the rear surface 32b of the short side frame portion 32 is connected to this electrode, and each lamp L is turned on and driven by the inverter 10. do. And the rubber holder 11 is supported by each frame L by the frame 3 by being fitted in the said lamp mounting hole (light source support part) 32e of the frame 3. Moreover, since each lamp L is hold | maintained by the light source support part provided in the frame 3 in this way, the exclusive lamp support member which supports the lamp L is abbreviate | omitted, and the number of parts of the light emitting device 1 is reduced. The cost can be lowered.

In addition to the above description, the inverter 10 may be attached to the outer side surface 32c between the rear surface of the reflective sheet 5 and the front frame 2.

The lamp spacer 12 includes a plate-shaped base 12a mounted on the front surface 5a of the reflective sheet 5, and two U-shaped retaining portions 12b placed side by side in the short side direction on the base 12a. And a lamp L fitted to the holding portion 12b. In addition, the lamp spacer 12 is composed of resin or rubber, preferably having shape stability to light, heat, and ultraviolet rays, and not affected by the leakage current from the lamp L. As the lamp spacer 12, a white or colorless material which does not emit light abnormally having the same degree of reflectance as that of the reflective sheet 5 is selected. Moreover, the holding part 12b is formed so that the radiation of the light from the lamp L may not be inhibited as much as possible, and especially when it is formed from a white material, as shown in FIG. 2, the light emitting surface side of the lamp L is shown. It is comprised in the shape which does not cover this.

Moreover, the support pin 13 is integrally provided in the base 12a in the lamp spacer 12, and the light emission surface structural member 4 is supported by this support pin 13. As shown in FIG. In addition, these lamp spacers 12 and the support pins 13 are provided at four ratios, for example, at four corners of a 3 inch square, and are arranged alternately as shown in FIG. In this way, the lamp spacer 12 and the support pin 13 are avoided from being placed side by side on the straight line as much as possible, thereby greatly suppressing the shadow of the lamp spacer 12 and the support pin 13 from appearing on the light emitting surface. L) and the light emitting surface constitution member 4 can be appropriately supported. In addition, since the base 12a of the lamp spacer 12 is attached to the front surface 5a of the reflective sheet 5, the flatness of this front surface 5a can be maintained more firmly. That is, since the holding portion 12b of the lamp spacer 12 supports the middle portion of the lamp L, both ends of the lamp L are supported by the lamp mounting hole 32e of the frame 3. The front surface 5a is supported by the lamp L, the lamp spacer 12 and the frame 3, so that the shape stability of the front surface 5a can be improved and the flatness can be more reliably secured by these lamps L and the like. Can be.

In addition to the above description, a lamp spacer and a support pin separately configured may be used.

In the present embodiment configured as described above, since the reflective sheet 5 is mounted to block the rear opening 3b of the frame 3 and the frame 3 is used as the supporting member of the reflective sheet 5, the front surface is used. Unlike the above-described conventional example in which the rear frame having a back sheet is used as the support member for the reflective sheet, the weight of the frame 3 can be greatly suppressed even when the light emitting area of the light emitting surface is increased. Moreover, since the weight increase of the support member (frame 3) of the reflective sheet 5 can be suppressed significantly, also in each other structural member, such as the front frame 2 assembled to this frame 3, the material and It is not necessary to carry out structural reinforcement by increasing the weight of the frame by changing the dimensions and the like. As a result, it is possible to easily reduce the weight of the light emitting device 1 and the liquid crystal display device, and to suppress the increase in the material cost of the constituent members such as the frame 3, thereby reducing the low cost light emitting device 1 and the liquid crystal display device. Can be configured.

In addition, in this embodiment, the front surface 5a of the reflective sheet 5 is spaced apart from the long side frame portion 31 of the frame 3, and the angle of the inclined side surface 5b with respect to the front surface 5a. Is mounted on the frame 3 in such a state that the angle can change, even when shrinkage (deformation) occurs in the reflective sheet 5 due to absorption of heat or moisture from the lamp L, or the like. have. As a result, in the reflective sheet 5, the deformation | transformation which generate | occur | produced while maintaining the front surface 5a in a flat state can be absorbed, and the fall of the function resulting from this deformation | transformation can be prevented from occurring in the reflective sheet | seat 5.

In addition, although the above description demonstrated the case where it applied to the backlight of a liquid crystal display device, the light emitting device of this invention reflects the light of a light source to the light emitting surface constituent member arrange | positioned behind a light source, and comprises a light emitting surface. A frame having a sheet and a front opening disposed at the rear of the light emitting surface constituting member and allowing the passage of light from the light source toward the light emitting surface constituting member, and the reflective sheet is formed to block the rear opening of the frame. It can apply to the light source of the illuminating device which emits planar illumination light, and other devices as long as it is attached to and to support it. Instead of the linear tube-shaped light source formed of the cold cathode tube, a linear source or a point-shaped light source having a spherical light emitting portion other than a U-shaped or the like may be used.

In addition, in the above description, the case where a frame having a unitary structure is used has been described. However, the frame of the present invention is not limited thereto, and for example, each side portion of the four sides of the frame shape is configured separately, and these sides You can also use frames that combine parts. Further, for example, a frame having an approximately C-shaped plane in which the middle portion of one of the short side frame portions is cut out may be used. However, as described above, it is preferable to use an integrally constructed frame in that the rigidity and (support) strength can be easily improved, and it is not necessary to assemble it in the form of a frame. In this case, the frame is more preferable in that the frame can be easily produced by injection molding or the like.

In addition, in the above description, the configuration in which the inclined side and the bent side are provided only on the long side direction side of the reflective sheet and the bent side is fixed to the frame has been described. If it has an inclined side and fixes this inclined side to a frame, the vertical surface perpendicular to the front surface may be formed continuously on the inclined side instead of the bending side, and this vertical surface may be fixed to the frame. Further, a box-shaped reflective sheet having a bottom with an inclined side surface formed on one side and a side open at the side may also be used.

According to the present invention, even when the light emitting area is increased, the weight increase and cost increase of the frame can be suppressed, so that the light emitting device can be easily reduced in weight, and the light emitting device and the liquid crystal display device having low cost are constituted. can do.

Claims (8)

A light emitting device comprising a light source and a light emitting surface constituting member disposed in front of the light source and constituting a light emitting surface, A reflection sheet disposed behind the light source and reflecting light of the light source toward the light emitting surface constituent member; And A front opening disposed at the rear of the light emitting surface constituting member and allowing a light to pass through the light source toward the light emitting surface constituting member, and a frame provided with a rear opening; And the reflective sheet is mounted to the frame to block the rear opening. The method of claim 1, The reflecting sheet has a front surface which is flatly formed and the light source is disposed in front, and an inclined side surface formed by bending forward at least two opposite sides of the front surface at an inclination angle of less than 90 °, respectively, And the reflective sheet is mounted on the frame by its inclined side being fixed to the frame. The method according to claim 1 or 2, And a support portion provided in the frame in contact with at least a rear surface of the reflective sheet. The method according to any one of claims 1 to 3, And a projection portion provided in the frame to be inserted into a hole formed in the light emitting surface constituting member on a front surface surrounding the front opening portion thereof. The method according to any one of claims 1 to 4, At the same time the light source is constituted by a linear light source, The frame is provided with a light source support portion for supporting both ends of the linear light source. The method according to any one of claims 1 to 5, At the same time the light emitting surface constituent member includes a planar optical sheet, A front frame disposed in front of the light emitting surface constituent member and provided with an opening for allowing passage of light from the light emitting surface to the outside; One side of the optical sheet is fixed to the inside of the front frame, the light emitting device. The method according to any one of claims 1 to 6, Light emitting device characterized in that the frame is an integral structure A liquid crystal display device comprising a liquid crystal panel and a backlight for irradiating light to the liquid crystal panel, A liquid crystal display device comprising the light emitting device according to any one of claims 1 to 7 as the backlight.

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