KR200312522Y1 - Picture frame having light emitting plate - Google Patents

Abstract

The present invention relates to a frame having a surface light source, and more particularly, a case in which the surface light source is installed and a structure for supporting the surface light source are integrally formed so that the surface light source can be easily manufactured and assembled and the manufacturing cost is low. It relates to a picture frame provided.

The frame having a surface light source according to the present invention includes a case having a support portion formed in a corner of a bottom plate surrounded by sidewalls and a rib formed on the bottom plate, a light guide plate and a light source provided on a side of the light guide plate, and surrounding the light source. A reflector installed at a side of the supporter, the surface light source supported by the support and the ribs and installed in the case, and a fixing member installed on an edge of the surface light source along a portion of the side wall and fixed to the support; A cover plate separated into an inner transparent region and an opaque region surrounding the transparent region, the transparent region facing the light guide plate, and a part of an inner edge of the opaque region adhered to the fixing member and fixed to the fixing member Characterized in that it comprises a.

Description

Frame with surface light source {PICTURE FRAME HAVING LIGHT EMITTING PLATE}

The present invention relates to a frame having a surface light source, and more particularly, a case in which the surface light source is installed and a structure for supporting the surface light source are integrally formed so that the surface light source can be easily manufactured and assembled and the manufacturing cost is low. It relates to a picture frame provided.

Picture frame refers to a form of a frame that can accommodate a post such as a picture or a picture, and in recent years, a number of picture frames with built-in lighting devices have been provided to enable the user to see the post in a dark place and to enhance its aesthetic effect. In particular, the lighting device is mainly used as a surface light source is installed on the side of the light guide plate, the light guide plate serves to reflect the light generated by the lamp from the side to the front surface, such as a photograph Cold Cathode Fluorescent Lamps with low heat generation are mainly used to prevent deterioration or discoloration.

By using the surface light source as described above, the present inventors can easily form a space in which a post such as a photo is stored by installing a spacer and a front cover plate on a front surface of a light emitting module frame having a plate-shaped surface light source. Designed a 'frame with a light emitting module frame' that is easy to replace and filed a utility model registration application No. 20-2002-0033792.

However, the 'frame with light emitting module frame' is because the light emitting module frame is configured by separately manufacturing a frame supporting the surface light source and a backing structure for fixing the surface light source to the frame, and assembling them. It is not only easy to manufacture and assemble, but also has a disadvantage of high manufacturing cost.

The present invention is to solve the problems as described above, the object of the present invention is that the case and the support structure for fixing the surface light source is installed integrally formed and easy to manufacture and assembly the cost It is to provide a picture frame with this inexpensive surface light source.

1 is an exploded perspective view of a frame having a surface light source according to an embodiment of the present invention

2 is a cross-sectional view showing a frame having a surface light source according to an embodiment of the present invention

3 is an exploded perspective view of a frame having a surface light source according to another embodiment of the present invention;

Figure 4 is a cross-sectional view showing a frame having a surface light source according to another embodiment of the present invention

<Brief description of the major symbols in the drawings>

110,210 photo frames with 100,200 surface light sources

112,212 Bottom Plates 114a, 114b, 114c, 114d Sidewalls

214a, 214b, 214c, 214d Sidewalls 115,215 Supports

116,216 Rib 120,220 Surface light source

121,221 Light guide plate 123,223 Lamp

125,225 Reflector 130,230 Fixing member

140,250 Cover plate 142,252 Transparent area

144,254 Opaque Area 240 spacer

A frame having a surface light source according to the present invention for achieving the above object is a bottom plate which is a polygonal plate material, and extends at a predetermined height in the height direction from the edge of the bottom plate so that the height of one side is lower than the height of the other side. And sidewalls formed around the edges of the bottom plate and corners formed by the two sidewalls adjacent to the bottom plate, each of which has a predetermined width and the same height as the height of the lower sidewall. A case having a support part extending in a predetermined length in both directions along the side, a case having a plurality of ribs protruding in the height direction on an upper surface of the bottom plate surrounded by the side wall with a height lower than the height of the support part, and the polygonal plate member A phosphor light guide plate, a light source provided on each side of the light guide plate, and a base of the light guide plate surrounding the light source A reflector provided on each side of the light guide plate so that each of the rib portions is exposed, each exposed edge of the light guide plate is aligned with an inner corner of the support portion, and a bottom surface is in contact with the top surface of the rib so that the top surface is low. A surface light source installed in the case so as to form a surface substantially the same as the top surface of the sidewall, and a sidewall having the low height such that the top surface is substantially the same as the top surface of the high sidewall. The fixing member fixed to the support part by contacting the upper surface of the edge of the surface light source and the upper surface of the support part along the inner side of the remaining side wall, and separated into an inner transparent area having a polygonal shape and an opaque area surrounding the transparent area. The transparent region is opposite to the light guide plate, and the inside of the opaque region Edge portion is in contact with the upper surface of the fixing member characterized in that it comprises a cover plate fixed to the fixing member.

The frame having the surface light source according to the present invention by the configuration as described above, the support and the rib is integrally formed in the case has the advantage of easy manufacturing of the case, it is easy to install the surface light source in the case do. Here, the rib not only supports the surface light source, but also forms a space through which a power supply device such as an inverter installed inside the case passes and a wire connecting the lamp of the surface light source. In addition, the fixing member not only fixes the surface light source to the case, but also spaces the upper surface of the surface light source from the bottom surface of the transparent area of the cover plate so as to correspond to the thickness of the fixing member so that the posts are stored therebetween. To form a space. In particular, since the fixing member is not installed on one side wall of which the height of the case is low, this part becomes an open gap through which a picture can be inserted or taken out in the space in which the post is stored. In addition, the cover plate is divided into a transparent area and an opaque area so that the picture is visible from the front through the transparent area, and the fixing member is located behind the bottom of the opaque area, so that it is not visible from the front. In the state where the picture is installed in the space in which the picture is stored, the light source emits light from the rear of the picture to make the picture look beautiful.

In addition, the picture frame having a surface light source according to the present invention, the bottom plate which is a polygonal plate material, a side wall extending to a certain height in the height direction from the edge of the bottom plate and formed around the edge of the bottom plate, and the bottom A support portion protruding from each of the corners formed by the plate and two neighboring sidewalls, the support having a predetermined width and a height lower than the height of the sidewall, and extending in a predetermined length in both directions along the two neighboring sidewalls; A case having a plurality of ribs protruding in the height direction on an upper surface of the bottom plate surrounded by the side wall lower, a light guide plate formed of the polygonal plate material, a light source provided on each side of the light guide plate, and surrounding the light source. Comprising reflectors provided on each side of the light guide plate so that each corner portion of the light guide plate is exposed Each of the exposed edges of the light guide plate is aligned with an inner corner of the support, and a bottom surface contacts the top surface of the rib so that an upper surface of the light guide plate is lower than the top surface of the side wall. And a fixing member fixed to the support part by contacting an upper surface of the edge of the surface light source and an upper surface of the support part along an inner side of the side wall, and having a constant thickness and a constant width, along the remaining side except for one side of the fixing member. A spacer disposed on an upper surface of the fixing member, an inner transparent region having the polygonal shape and an opaque region surrounding the transparent region, the transparent region facing the light guide plate, and a portion of an inner edge of the opaque region A cover plate fixed to the spacer in contact with an upper surface of the spacer; The features.

According to the above configuration, the picture frame including the surface light source according to the present invention is spaced apart from each other by separating the upper surface of the surface light source and the bottom surface of the transparent region of the cover plate as much as the spacer corresponds to the thickness thereof. It will form a space for the same post. In addition, a gap formed between the bottom surface of the cover plate and the upper surface of the fixing part is formed at one side of the side where the spacer is not installed, so that the post can be inserted into or removed from the space in which the post is accommodated.

In addition, the picture frame provided with the surface light source according to the present invention, the recessed portion formed in the depth direction of the case is recessed in a portion of the bottom plate of the case, the rib is formed on the upper surface of the bottom plate around the recessed portion It features.

With the above configuration, the surface light source according to the present invention provides a space in which the recess is provided with an inverter for supplying power to the lamp of the surface light source.

In addition, the frame having a surface light source according to the present invention is characterized in that the case is formed integrally by injecting plastic.

With the above structure, the frame provided with the surface light source according to the present invention not only makes the case easy to manufacture, but also makes the manufacturing cost low.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is an exploded perspective view showing a frame 100 having a surface light source according to an embodiment of the present invention, Figure 2 is a frame 100 having a surface light source according to an embodiment of the present invention It is a cross section. The frame 100 having a surface light source according to the present invention includes a case 110, a surface light source 120, a fixing member 130, and a cover plate 140.

The case 110 has a bottom plate 112 and the side wall (114a to 114d) has a box shape formed by extending the magnetic field of the bottom plate 112 to a predetermined height in the height direction, the surface therein An inverter 129 or the like for supplying power to the light source 120 and the surface light source 120 is installed. In addition, a support part 115 and ribs 116 and Rib for supporting the surface light source 120 are provided inside the case 110. The bottom plate 112 is a rectangular plate. In the center portion of the bottom plate 112 is formed recessed portion 112a recessed in the depth direction. Since the recess 112a is formed to allow the relatively large inverter 129 to be installed, the recess 112a may be deleted or formed in another shape according to the shape or size of the inverter 129. A hole is formed in a location of the side wall of the recess 112a, and a wire is drawn out through which the surface light source 120 is connected to an external power source or a DC socket 118 is installed in the hole as shown in the drawing. Can be done. In addition, a switch 119 for controlling the power of the surface light source may be installed at another location on the sidewall of the recess 112a. Sidewalls 114a to 114d of the case 110 extend from the edge of the bottom plate 112 to a predetermined height in the height direction and are formed around the edge of the bottom plate 112. One sidewall 114a located on one side of the bottom plate 112 among the sidewalls 114a to 114d has a height lower than that of the sidewalls 114b to 114d located on the other side of the bottom plate 112. Is formed. As described above, one sidewall 114a is formed to have a height lower than the heights of the remaining sidewalls 114b to 114d, thereby forming an opening for inserting or extracting a photo toward the lower sidewall 114a. The height difference between the lower sidewall 114a and the remaining sidewalls 114b to 114d is preferably equal to the thickness of the fixing member 130, which will be described in detail together with the fixing member 130. On the other hand, in the drawing, the width of the lower sidewall 114a is formed to be thicker than the width of the remaining sidewalls 114b to 114d so that a part of the edge of the post as shown in the photograph is exposed and can be easily gripped by hand. An embodiment is shown in which the photo-holding groove 117 is formed by concavely cutting the center of the outer surface. The support part 115 is a bottom plate 112 and the two adjacent sidewalls [114a and 114b or 114b to which the edges formed by two neighboring side surfaces of the surface light source 120 are fitted. 114c) or 114c and 114d or 114d and 114a] protrude in the inward direction and the height direction, respectively, and have the same width and height as the height of the lower sidewall 114a. It extends to a predetermined length in both directions along the two side walls. That is, the support part 115 protrudes from the bottom plate 112 in the height direction so as to have the same height as the side wall 114a having the low height. Accordingly, the upper surface 115a of the support 115 forms a surface substantially the same as the upper surface of the lower sidewall 114a. In addition, the support part 115 protrudes inward from the two neighboring sidewalls and has a shape extending in a predetermined length in both directions along the two neighboring sidewalls. Accordingly, the upper surface 115a of the support 115 has a predetermined width and bidirectionally parallel to each of the two adjacent sidewalls at positions spaced apart by the predetermined width inwardly from each of the two adjacent sidewalls. As a result, two adjacent inner surfaces 115b and 115c extending to a predetermined length are formed. The surface light source 120 when the surface light source 120 is installed inside the case 110 at each of the inner corners of the support part 115 where the two neighboring inner surfaces 115b and 115c meet each other. Each of the corner portions formed by two neighboring sides of is fitted. That is, the surface light source 120 has four corners each supported by each of the support parts 115 and is installed in the case 120. The ribs 116 support the surface light source 120 by contacting a bottom surface of the surface light source 120, and the height of the rib 116 is lower than that of the low sidewall 114a. Protrude in the height direction on the upper surface of the). A plurality of ribs 116 are regularly arranged around the recess 112a. Referring to the drawings, the ribs 116 are formed on the bottom plate 112 one by one on each side of each corner outside of the recess 112a to evenly support the bottom surface of the surface light source 120. The reason for supporting the surface light source 120 by forming the rib 120 on the bottom surface 112 as described above is to space the bottom surface of the surface light source 120 and the top surface of the bottom plate 112 to some extent. In order to form a space through which the wires connecting the lamp 123 installed on the side of the surface light source 120 and the inverter 129 provided on the recess 112a can pass. Meanwhile, an upper surface of the surface light source 120 supported by the rib 116 and installed in the case 110 may be formed to have a surface substantially the same as an upper surface of the lower sidewall 114a. Accordingly, the rib 116 protrudes from the bottom plate 112 to have a height lower than that of the low sidewall 114a in consideration of a predetermined thickness of the surface light source 120. That is, the rib 116 is formed to have a height lower than that of the surface light source 120 than the side wall 114a having a low height. Meanwhile, a pedestal 150 for standing the frame of the case 110 may be provided. That is, the pedestal fixing plate 151 is installed on the rear surface of the recess 112a, and one end of the pedestal 150 is connected to the rear surface of the pedestal fixing plate 151 and is installed on the rear surface of the bottom plate 112.

The surface light source 120 is a light guide plate 121, the lamp 123, a reflector 125, and an inverter 129 to shine light on the back of the picture installed in front of the. The light guide plate 121 is a plate formed in a rectangular shape similar to the shape of the case 110. The light guide plate 121 reflects light incident from the side surface of the light guide plate 121 to one surface. The lamp 123 is installed on the side of the light guide plate 121 to emit light by receiving a current. As described above, the cold cathode fluorescent lamp is preferably used as the lamp 123 in order to prevent deterioration of a photograph. The reflector 125 is for reflecting the light emitted from the lamp 123 into the side surface of the light guide plate 121. The reflector 125 surrounds the lamp 123 and is installed at the side of the light guide plate 121. That is, the reflector 125 is bent so that both sides end corresponding to the long side of the long rectangular plate material in the same direction so that each of the both ends are in close contact with each of both sides of one side of the light guide plate 121. It is installed on each side of the light guide plate 121. Meanwhile, the length of the reflector 125 is shorter than the length of the side surface of the light guide plate 121 on which the reflector 125 is installed. Therefore, the edges of the light guide plate 121 and a part of the side surfaces forming the corners are exposed to the outside of both ends in the longitudinal direction of the reflector 125 provided on the side of the light guide plate 121. The inverter 129 is a device for supplying power to the lamp 123 and is mounted in the space formed by the recess 112a of the case 110 and the bottom surface of the light guide plate 121. The inverter 129 is connected to the DC socket 118 and the switch 119 by a predetermined wire, and is connected to the lamp 123 by a predetermined wire passing through a space secured by the rib 116. do. The surface light source 120 is installed inside the case 110. In more detail, the surface light source 120 has a corner portion of the light guide plate 121 exposed outward at both ends in the longitudinal direction of the reflector 125 such that the inner side surface of the supporter 115 is adjacent ( Fit to the corner formed by the 115b, 115c, the bottom surface which does not emit light of the surface light source 120 is installed inside the case 110 to contact the upper surface of the rib 116. In this case, the surface light source 120 is installed so that the upper surface thereof is substantially the same as the top surface of the low sidewall (114a).

The fixing member 130 fixes the surface light source 120 to the case 110 and at the same time a photo may be stored between the bottom surface of the cover plate 140 and the top surface of the light guide plate 121. It is to form a space of a flat bar-shaped member having a constant thickness and a constant width. After the surface light source 120 is installed in the case 110, the fixing member 130 may be disposed along the inner side of the sidewalls 114b to 114d except for the sidewalls 114a having a low height. The bottom surface is installed in contact with the upper surface of the edge. That is, the fixing member 120 is not installed inside the low sidewall 114a. The reason is to form an open gap in which the picture can be inserted or removed. The fixing member 130 supports the edge of the surface light 120 by fixing a portion of the support portion 115 that is in contact with the upper surface 115a of the support portion 115 to the support portion 115 with a predetermined screw 131 or the like. It is fixed to the 110 integrally. In the fixed state as described above, the upper surface of the fixing member 130 is substantially the same as the upper surface of the remaining sidewalls 114b to 114d except for the lower sidewall 114a. That is, the height difference between the low sidewall 114a and the remaining sidewalls 114b to 114d corresponds to the thickness of the fixing member 140 and is substantially the same as the top surface 115a of the support 115. When the fixing member 140 is fixed to the top edge of the surface light source 120, the height of the fixing member 140 is substantially the same as the height of the remaining sidewalls 114b to 114d except for the lower sidewall 114a. You lose. Meanwhile, in the drawing, the remaining three sides in which the fixing member 130 has one side removed are integrally formed, and are installed along the inner side of the remaining three sidewalls 114b to 114d except for the lower sidewall 114a. The embodiment in which the portion in contact with the upper surface 115a of) is fixed to the support 115 by a screw is shown.

The cover plate 140 is fixed to the fixing member 130 as a plate shape of a larger than the case 110, the space between the bottom surface and the top surface of the surface light source 120 has a space for storing pictures do. The cover plate 140 surrounds the transparent region 142 and the transparent region 142 having an area corresponding to the width of the portion where the surface light source 120 is exposed to the front and the polygonal shape. Is separated into an opaque region 144. The cover plate 140 has the transparent region 142 facing the upper surface of the light guide plate 121, a part of the inner edge of the opaque region 144 is in contact with the fixing member 130, the fixing member ( 130). That is, since the fixing member 130 is not installed on the sidewall 114a having a lower height, the remaining portion of the inner edge of the opaque region 144 except for the portion contacts the fixing member 130. The contacted part is fixed to the fixing member 130. As a method of fixing the cover plate 140 to the fixing member 130, a method of adhering the contact portion with an adhesive or double-sided tape is simple. When the cover plate 140 is installed as described above, a space in which a picture can be stored is secured between the cover plate 140 and the surface light source 120. That is, a post such as a photograph is accommodated in a space between the transparent region 142 and the light guide plate 121. In addition, the post may be inserted into or removed from the space between the top surface of the sidewall 114a and the bottom surface of the cover plate 140 along the sidewall 114a on the side of the low sidewall 114a. So that an opening is formed.

3 is an exploded perspective view showing a frame 200 having a surface light source according to another embodiment of the present invention, Figure 4 is a cross-sectional view of the frame 200 having a surface light source shown in FIG. The frame 200 having the surface light source according to the embodiment includes a case 210, a surface light source 220, a fixing member 230, a spacer 240, and a cover plate 250. Unlike the date shown in FIG. 1, the frame 200 having the surface light source according to the embodiment further includes a spacer 240, and the structure and function of the case 210 and the fixing member 230. This feature is changed accordingly, so only the main features will be described below.

The case 210 has a bottom plate 212 that is a polygonal plate formed with a recess 212a in the center, and extends at a predetermined height in a height direction from an edge of the bottom plate 212, and rounds the edge of the bottom plate. And the corners formed by the sidewalls 214a to 214d and the two sidewalls 214a and 214b0 or 214b and 214c or 214c and 214d or 214d and 214a which are adjacent to the bottom plate 212, respectively. A support portion 115 protruding from and extending to a predetermined length in both directions along the two neighboring side walls with a lower width and a height lower than the heights of the side walls 214a to 214d, and the height of the support portion 115 being the height of the support portion 115. It further includes a plurality of ribs 216 protruding in the height direction on the upper surface of the bottom plate surrounded by the side walls (214a to 214d) As described above, according to an embodiment of the present invention shown in FIG. Case 110 Unlike the case 110 of the following embodiment, the height of the sidewalls 214a to 214d is the same.

The surface light source 220 may be a light guide plate 221 which is a polygonal plate, a light source 223 provided on each side of the light guide plate 221, and a corner portion of the light guide plate 221 surrounding the light source 223. Reflectors 225 are provided on each side of the light guide plate 221 so that each of them is exposed, each exposed edge of the light guide plate 221 is aligned with an inner corner of the support 215 and the bottom surface thereof is the rib 216. The upper surface is in contact with the top surface of the bottom) is installed in the case lower than the top surface of the side walls (214a to 214d). Since the surface light source 220 is substantially the same as the surface light source 120 of the embodiment illustrated in FIG. 1, a detailed description thereof will be omitted.

The fixing member 230 has a predetermined thickness and a predetermined width, and is installed on the edge upper surface of the surface light source 220 along the inner side of the sidewalls 214a to 214d and fixed to the support part 215. The fixing member 230 is a structure that supports the entire edge of the surface light source 220, unlike the fixing member 130 of the temporary embodiment shown in Figure 1, the height of the upper surface is substantially the same as the upper surface of the side wall Has height

The spacer 240 is installed on the upper surface of the fixing member 230 along the remaining side except for one side of the fixing member 230. Referring to the drawings, the spacer 240 has a width corresponding to a width capable of covering the top surfaces of the fixing member 230 and the sidewalls 214a to 214d, and three side edges of the fixing member 230. It is attached to the upper surface along. The spacer 240 is for forming a space in which the post is accommodated between the cover plate 250 and the surface light source 220, and the space is spaced apart by the spacer 240 having a predetermined thickness. It is formed between the plate 250 and the surface light source 220. In addition, since the spacer 240 is installed only on three sides of the fixing member 230, an upper surface of the fixing member 230 is formed at one side of the fixing member 230 in which the spacer 240 is not installed. A long open gap is formed between the bottom of the cover plate 250, and the opening may be inserted into or removed from the space in which the post is accommodated. On the other hand, since the spacer 240 is installed on the upper surface of the fixing member 230, and the cover plate 250 is installed on the upper surface, the spacer 240 uses a double-sided tape having a certain constant thickness. This may facilitate the operation of fixing the spacer 240 to the fixing member 230 and fixing the cover plate 250 to the spacer 240.

The cover plate 250 is divided into an inner transparent region 252 having a polygonal shape and an opaque region 254 surrounding the transparent region 252, and the transparent region 252 is the light guide plate 221. A portion of the inner edge of the opaque region 254 is in contact with the top surface of the spacer 240 to be fixed to the spacer 240.

The picture frame provided with the surface light source by the above structure is used as follows.

The photograph is stored in a space formed by the surface light source and the cover plate of the frame having the surface light source. The surface light source projects light from the rear of the picture to the front, and the light makes the post look beautiful. On the other hand, since the space in which the photo is stored is opened in one direction, it is convenient to remove the post or insert the post through the opened portion.

Framed with a surface light source according to the present invention by the above configuration is easy to manufacture and assembly because the case in which the surface light source is installed and the structure supporting the surface light source is formed integrally and the production cost is also low Have

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (6)

A bottom plate which is a plate of polygonal shape, side walls formed by extending a predetermined height in a height direction from the edge of the bottom plate and circumscribing the edge of the bottom plate such that the height of one side is lower than the height of the other side; Protruding into corners formed by two sidewalls, the support having a predetermined width and the same height as the height of the lower sidewall, and having a predetermined length extending in both directions along the two neighboring sidewalls; A case having a plurality of ribs projecting in the height direction on an upper surface of the bottom plate surrounded by the side wall lower; A light guide plate that is a polygonal plate material, a light source provided on each side of the light guide plate, and reflectors disposed on each side of the light guide plate to surround each of the light sources so that each corner portion of the light guide plate is exposed. A surface light source installed in the case, each of which is aligned with an inner corner of the support portion and whose bottom surface is in contact with the top surface of the rib so that the top surface is substantially the same as the top surface of the low sidewall; The upper surface of the edge of the surface light source and the upper surface of the support portion along the inner side of the remaining side wall except for the low side wall such that the upper surface has a constant thickness and a constant width and the upper surface is substantially the same as the top surface of the high side wall. A fixed member fixed to the support part in contact with the The transparent area inside the polygonal shape and an opaque area surrounding the transparent area, the transparent area is opposed to the light guide plate, a portion of the inner edge of the opaque area is in contact with the upper surface of the fixing member for fixing And a cover plate fixed to the member. The method of claim 1, The recessed part which is recessed in the depth direction of the case is formed in a part of the bottom plate of the case, and the rib is formed on the top surface of the bottom plate around the recess. The method according to claim 1 or 2, The case is a frame having a surface light source, characterized in that formed integrally by injecting plastic. Protrudes in each corner formed by a bottom plate which is a plate of polygonal shape, a side wall extending at a predetermined height in the height direction from the edge of the bottom plate and formed around the edge of the bottom plate, and two side walls adjacent to the bottom plate. And a support having a predetermined width and a height lower than the height of the sidewall, the support being extended in a predetermined length in both directions along the two neighboring sidewalls, and the upper surface of the bottom plate surrounded by the sidewall with a height lower than the height of the support. A case having a plurality of ribs protruding in the height direction, A light guide plate that is a polygonal plate material, a light source provided on each side of the light guide plate, and reflectors disposed on each side of the light guide plate so as to expose each corner portion of the light guide plate to surround the light source, and to expose exposed edges of the light guide plate. A surface light source each of which is fitted to an inner corner of the support portion and whose bottom surface is in contact with the top surface of the rib so that an upper surface of the case is lower than the top surface of the side wall; A fixed member having a constant thickness and a constant width and being in contact with an upper surface of an edge of the surface light source and an upper surface of the support part along an inner side of the side wall, and fixed to the support part; A spacer having a constant thickness and a constant width and installed on an upper surface of the fixing member along the remaining side except for one side of the fixing member; An inner transparent region having an polygonal shape and an opaque region surrounding the transparent region, the transparent region facing the light guide plate, and a portion of an inner edge of the opaque region is in contact with an upper surface of the spacer to contact the spacer. Picture frame provided with a surface light source, characterized in that it comprises a fixed cover plate. The method of claim 4, wherein The recessed part which is recessed in the depth direction of the case is formed in a part of the bottom plate of the case, and the rib is formed on the top surface of the bottom plate around the recess. The method according to claim 4 or 5, The case is a frame having a surface light source, characterized in that formed integrally by injecting plastic.