JP2010033820A - Structure for fixing light-emitting tile, surface light-emitting device and bezel for fixing light-emitting tile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a light-emitting tiles to be stably arranged in a device housing by keeping a thin structure of a surface light-emitting device as a whole. <P>SOLUTION: A structure includes: light-emitting tiles 7 each having a rectangular outer shape in a plain view and a planar light-emitting surface; and bezels 9 each including a locking claw 9d which includes a bottom surface 9a, rises substantially vertically from at least the outer peripheral edge of the bottom surface 9a, and includes a shape lockable to the light-emitting tile 7. In the structure, each light-emitting tile 7 is placed on the bottom surface 9a of the bezel 9, and each locking claw 9d is locked to the light-emitting tile 7 to fix the light-emitting tile 7 on the bezel 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a planar light emitting device used as an image forming apparatus, a liquid crystal backlight, or the like, and more particularly to a planar light emitting device in which a plurality of rectangular light emitting tiles in a planar view are adjacently arranged in a matrix direction. In particular, the present invention relates to a structure for fixing a light emitting tile so as to improve positioning accuracy when a plurality of light emitting tiles are arranged in a housing.

In a planar light emitting device as an image forming apparatus, a plurality of light emitting tiles having a planar light emitting surface are arranged in a rectangular frame-like housing, and light emission and non-light emission of these light emitting tiles are controlled. (See Patent Document 1). A light emitting tile used in such a planar light emitting device has a light source inside, has a rectangular shape in plan view, and has a light emitting surface as described above. It is preferable that positioning in the body is easy and can be stably arranged. On the other hand, the need for the above-mentioned stable arrangement becomes higher as the light emitting tiles become larger and thinner as the planar light emitting device becomes larger and thinner. The light emitting tile has a light source inside, but there are various types of light source methods such as organic EL, inorganic EL, plasma, LED, field emission (FED) and the like.
JP 2007-280635 A

  Therefore, a problem to be solved by the present invention is to enable a light emitting tile to be stably arranged in a housing in a planar light emitting device.

  Another object of the present invention is to make it possible to contribute to a reduction in manufacturing cost as a structure in which the number of parts does not increase when a light emitting tile is structured to be stably arranged in a housing.

  In the present invention, in the case of a light-emitting tile having a high-pressure portion inside, when the light-emitting tile has a structure in which the light-emitting tile can be stably disposed in the housing, in addition to the structure in which the number of parts does not increase, the safety is improved. It is to raise.

  The light emitting tile fixing structure according to the first aspect of the present invention includes a light emitting tile having a rectangular outer shape in plan view and a light emitting surface having a planar shape, a bottom surface having a planar view outer shape substantially the same as the light emitting tile, and at least two sides of the bottom surface. A light emitting tile fixing bezel having a side surface rising from an outer peripheral edge and provided with a locking portion for partially locking the light emitting tile on the bottom surface, the light emitting on the bottom surface of the bezel The tile is placed, the locking portion is locked to the light emitting tile, and the light emitting tile is fixed on the light emitting tile fixing bezel.

  The surface shape of the light emitting surface of the light emitting tile is not limited to a flat surface, and may include a curved surface protruding outward, a curved surface recessed inward, and the like.

  The said latching | locking part is not limited to nail | claw shape or plate shape, What is necessary is just a shape which can be latched. Further, the locking portion is not limited to the one formed integrally with the bezel, and may be configured separately from the bezel. Further, in the case of the separate body, the locking portion may be a hard material or a soft material.

  In the first aspect of the present invention, the light emitting tile can be fixed to the bezel by the engaging portion while being placed on the bottom surface, so that the light emitting tile can be handled integrally with the bezel, and as a result, the light emitting tile Is stored in a predetermined position in the casing, the bezel can be positioned in the predetermined position, so that the light emitting tile can be easily stored in the casing. It is possible to contribute to the stable arrangement of the light emitting tiles at the predetermined positions.

  The planar light emitting device according to the second aspect of the present invention has a shape in which a planar view outer shape is a rectangular shape and a light emitting surface has a planar shape, and the light emitting tiles can be arranged in a matrix with the respective light emitting surfaces in the same direction. A housing and a plurality of light emitting tile fixing bezels for fixing the light emitting tile, the bezel having a rectangular shape in plan view and a bottom surface on which the light emitting tile is placed, and at least two sides outside the bottom surface A side surface that rises from the periphery, partly provided with a locking part that can be locked to the light emitting tile on the bottom surface, and partly provided with another locking part that can be locked to the housing. It is characterized by this.

  The second planar light emitting device of the present invention controls the light emission of each light emitting tile by itself to form an image as a whole, or is disposed on the back side of the liquid crystal display panel to illuminate the liquid crystal display panel. It can be applied to a backlight or the like.

  In the second aspect of the present invention, the light emitting tile can be fixed to the bezel with its engaging portion, so that the light emitting tile can be handled integrally with the bezel and the light emitting tile is stored in a predetermined position in the housing. In this case, the other locking portion of the bezel is locked to the housing, so that the positioning and positioning of the light emitting tile in the housing at a predetermined position can be performed with high accuracy, and the light emitting tile in the housing is stable. You will be able to contribute to the placement.

  In the second aspect of the present invention, a preferred aspect is that the bottom surface of the bezel has a function of diffusing emitted light incident from the light emitting tile.

  In this aspect, it is not necessary to provide a diffusion plate or the like for diffusing the light emitted from the internal light source on the light emitting surface of the light emitting tile, and the number of parts can be reduced accordingly.

  In another preferred embodiment of the present invention, the light-emitting tile has a high-pressure portion near the inner light-emitting surface, the bezel has the light-emitting surface side of the light-emitting tile placed on the bottom surface, The high pressure part is covered from the outside.

  In the above-described another aspect, even when a high-pressure portion exists inside the light-emitting tile, the high-pressure portion of the light-emitting tile is covered with the bezel, so that the light-emitting tile can be stably disposed in the housing, and the internal high-pressure portion is externally attached. It can be shielded from and can increase its safety.

  The light emitting tile fixing bezel according to the third aspect of the present invention has a bottom surface having a rectangular shape in plan view so that a rectangular light emitting tile in plan view arranged in a matrix can be placed in the housing, and at least the bottom surface described above The locking portion having a shape that rises substantially perpendicularly from the outer peripheral edge of the light emitting tile on the bottom surface, and the locking portion is locked to the light emitting tile placed on the bottom surface. And another locking portion for locking and fixing the light emitting tile at a predetermined position in the housing by being locked to the housing.

  In the present invention, the light emitting tiles can be stably arranged in the device housing without obstructing the thin structure of the entire planar light emitting device.

  Hereinafter, a light emitting tile fixing structure, a planar light emitting device, and a light emitting tile fixing bezel according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an external configuration of the same light emitting device in an exploded state, FIG. 2 shows the same light emitting device viewed from the direction P in FIG. 1 and partially cut away, and FIG. 3 shows the same light emitting device. The apparatus is shown in the Q direction of FIG. 1 and partially cut away, FIG. 4 shows a cross-sectional configuration taken along line AA of FIG. 3, and FIG. 5 shows the appearance of the bezel.

  First, referring to these drawings, a planar light emitting device 1 according to an embodiment includes a device housing 5 having a storage recess 3 having a rectangular shape in plan view, and a plurality of light emitting elements arranged in a matrix in the device housing 5. A tile 7, a light emitting tile fixing bezel 9 that fixes the light emitting tile 7, and a plurality of electrode holding plates 11 that are fixedly arranged between the light emitting tiles 7 in the storage recess 3 of the apparatus housing 5.

  The bezel 9 is made of a transparent or translucent material. Preferably, the bezel 9 is made of a material having a light diffusibility so that the emitted light from the light emitting tile 7 can be emitted. The light emitting tile 7 and the bezel 9 constitute an integrated light emitting tile assembly 10. The electrode holding plate 11 includes a plurality of insulating shielding portions 11b which will be described in detail later in the longitudinal direction (row direction). These insulating shielding portions 11b are provided individually corresponding to the respective light emitting tiles 7 in the row direction.

  The light emitting tile 7 has a cubic thin shape by a pair of front and rear glass panels 13 and 15 facing each other and four resin side panels 17 interposed between the panels 13 and 15. The low-potential internal electrode 23 is assembled and vacuum-sealed inside, and the light-emitting layer 19 and the high-potential internal electrode 21 are provided on the inner surface of the front panel 13 and the cathode electrode is formed on the inner surface of the rear panel 15. And a light emission inducing film 25 having a function of inducing light emission to the light emitting layer by electrical action in a state opposite to the light emitting layer 19.

  In the light emitting tiles 7 adjacent to each other in the column direction, each front panel 13 protrudes in the facing direction, and the protruding portion constitutes one end portion 13a in the column direction. The light emitting tile 7 has a light emitting surface on the front panel 13 side surface.

  The high potential internal electrode 21 of the light emitting tile 7 is drawn to the outside by an electrode lead terminal 27. The electrode lead terminal 27 extends from the gap between the side panel 17 and the front panel 13 on the one end portion 13 a of the front panel 13. The electrode lead-out terminal 27 is connected to an internal connector terminal 29 made of conductive rubber.

  The bezel 9 has a bottom surface 9a that is substantially the same shape and size as the light-emitting tile 7 and on which the light-emitting tile 7 can be placed, and side surfaces 9b and 9c that rise on the outer peripheral edges on two sides in the column direction of the bottom surface 9a. A locking claw 9d having a shape that extends at least vertically from the outer peripheral edge of the bottom surface 9a in the row direction and can be locked to the light emitting tile 7, and the engagement claw mounted on the bottom surface 9a. And another locking claw 9e for locking the light emitting tile 7 to a predetermined position in the housing 5 by locking the light stopping tile 9d to the light emitting tile 7 and locking it to the housing 5.

  The length of the locking claw 9 d extends long on the non-light emitting surface of the light emitting tile 7, and the tip shape thereof has a claw shape that can be locked to the non-light emitting surface of the light emitting tile 7.

  The locking claw 9 e extends on the housing surface of the device housing 5 longer than the locking claw 9 d and has a claw shape whose tip shape can be locked to the device housing 5.

  The side surfaces 9b and 9c of the bezel 9 do not need to extend over the entire outer peripheral edge of the bottom surface 9a in the two rows in the row direction, and may be partially raised from the outer peripheral edge of the bottom surface 9a at one or a plurality of locations. The bezel 9 fixes the light emitting tile 7 to the bezel 9 by placing the light emitting surface side of the light emitting tile 7 on the bottom surface 9a and locking the light emitting tile 7 to the back surface of the light emitting tile 7 with the locking claws 9d. Can be done. Moreover, one side surface 9b of the bezel 9 can be a plate-shaped insulating shielding portion 9f for securing a creeping creepage distance that can partially enter a facing gap between adjacent light emitting tiles 7 among a plurality of rising portions.

  Also, the bottom surface of the bezel 9 has a function of diffusing emitted light incident from the light emitting tile 7. Examples of the material of the bezel 9 include transparent ABS and polycarbonate. Preferably, a material having heat resistance to the light emitter is preferable. Since such a bezel 9 has a function of diffusing emitted light, it is not necessary to provide a diffusion plate or the like for diffusing emitted light from the internal light source on the light emitting surface of the light emitting tile 7, and accordingly, the number of parts is reduced accordingly. Can be reduced.

  The electrode holding plate 11 is made of an insulating resin, and a plate main body 11a for mounting the electrode holding plate 11 across the back surfaces of the light emitting tiles 7 adjacent to each other in the column direction, and the other in the gap between the adjacent light emitting tiles 7 And a plate-like insulating shielding portion 11b that can enter from one side to the other side from a position facing the internal connector terminal 29 in the column direction. The plate body 11a is formed with a rectangular hole 11c in plan view through which the insulating shield 9f of the bezel 9 can be inserted.

  On the side surface of the insulating shielding part 11b of the electrode holding plate 11, an external connector terminal 11d for drawing out a high potential internal electrode serving both as an anode electrode and a metal back of the light emitting tile 7 is embedded by a resin mold. The electrode holding plate 11 further includes an external connector terminal for drawing out a low potential internal electrode, which is a cathode electrode, to the outside, but the connector terminal is not shown in the embodiment.

  The electrode holding plate 11 includes a potential application electrode 11e that is connected to the external connector terminal 11d and applies a high potential from a power supply (not shown) to the external connector terminal 11d. Note that only a part of the potential application electrode 11e is shown, and the illustration of the high potential application path is omitted for convenience of illustration. In the electrode holding plate 11, the portion where the electrode is exposed to the outside is only the external connector terminal 11d.

  The insulating shield 9 f of the bezel 9 is inserted into the rectangular hole 11 c of the electrode holding plate 11, and the tip is fitted and fixed in the fixing hole 5 b of the mounting base 5 a fixed to the lower surface of the apparatus housing 5.

  In the planar light emitting device 1 having the above configuration, the electrode holding plate 11 is arranged and fixed at equal intervals in the column direction by a fixing means (not shown) on the device housing 5, while the light emitting tiles 7 are provided on each of the bezels 9. Store. Then, the light emitting tiles 7 accommodated in the bezel 9 are arranged between the electrode holding plates 11 arranged in the column direction. In this arrangement state, the shielding plate 11b of the electrode holding plate 11 enters the gap in the row direction of the light emitting tile 7 from one side to the other side, and the insulating shielding portion 9f of the bezel 9 also faces the row direction of the light emitting tile 7. Enter the gap from one side to the other. A high potential is applied to the high potential internal electrode 21 of the light emitting tile 7 by connecting the internal connector terminal 29 on the light emitting tile 7 side to the external connector terminal 11 d of the electrode holding plate 11. In this case, the insulating shielding portions 11b and 9f of the electrode holding plate 11 and the bezel 9 overlapping in the column direction are interposed between the connector connecting portions of the connector terminals 29 and 11d and the opposing gaps of the adjacent bezels 9 respectively. It has become.

  As a result, the planar light emitting device 1 is thin and has a short spatial distance from the connector connecting portion to the facing gap of the adjacent bezel 9, but the insulating creepage distance is the insulating shielding portion 11b of each of the electrode holding plate 11 and the bezel 9. 9f, the insulation creepage distance from the internal connector terminal 29 to the adjacent gap between adjacent bezels is at least between the shielding plate for securing the insulation creepage distance and the bezel portion overlapping in the column direction. It is possible to secure an insulation creepage distance that is the sum of the opposing height and the bezel outer side surface height.

  In the present embodiment, the light-emitting tile 7 is locked to the locking claw 9d of the bezel 9 and is assembled into an integral assembly and housed in the casing 5, and the casing 5 is engaged with the bezel 9. The light emitting tile 7 is positioned and fixed at a predetermined position in the housing 5 by being locked to the pawl 9e. As a result, when the light emitting tile 7 is stored in a predetermined position in the housing 5, the light emitting tile 7 is easily stored in the housing 5, and the light emitting tile 7 is positioned in the housing 5. Can be stabilized.

  In the above-described embodiment, the planar light emitting device 1 can constitute an image forming apparatus, and is disposed on the back side of the liquid crystal display panel 31 as a liquid crystal backlight 30 as shown in FIG. It can also be used as a backlight for illuminating the liquid crystal display panel 31. In addition to the liquid crystal display panel, this display panel is a display panel such as a plasma display (PDP), a light emitting diode display, an organic or inorganic EL display, a field emission display (FED), an electroluminescence display, a fluorescent display tube display, etc. Can be applied to these.

  As described above, in the present embodiment, the light emitting tile 7 can be stably arranged in the housing 5.

FIG. 1 is a diagram showing an external configuration of a planar light emitting device according to an embodiment of the present invention, with a part cut away in an exploded state. FIG. 2 is a diagram showing a planar configuration from a mounting housing on the non-light emitting side of the same planar light emitting device as seen from the P direction of FIG. 1 and partially cut away. FIG. 3 is a diagram showing the configuration from the bezel side, which is the light emission side, of the same planar light emitting device as seen from the Q direction of FIG. FIG. 4 is a diagram showing a cross-sectional configuration taken along the line AA of FIG. FIG. 5 is a view showing the appearance of the bezel. FIG. 6 is a diagram showing a state in which the planar light emitting device of the embodiment is incorporated in a liquid crystal display panel as a liquid crystal backlight, with a part of the liquid crystal backlight cut away.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Planar light-emitting device 3 Storage recessed part 5 Apparatus housing 7 Light emitting tile 9 Bezel 9a Bottom surface 9b, 9c Side surface 9d, 9e Locking claw 9f Insulation shielding part 11 Electrode holding plate 11a Plate body 11b Insulation shielding part 11d External connector terminal 29 Inside Connector terminal

Claims (5)

A light-emitting tile having a rectangular shape in plan view and a light-emitting surface that is planar;
The bottom view has a bottom surface that is substantially the same shape as the light emitting tile, and a side surface that rises from at least two outer peripheral edges of the bottom surface, and is provided with a locking portion for partially locking the light emitting tile on the bottom surface. A bezel for fixing light emitting tiles,
With
A light emitting tile fixing structure in which the light emitting tile is placed on the bottom surface of the bezel, and the light emitting tile is fixed on the bezel by engaging the locking portion with the light emitting tile. A light-emitting tile having a rectangular shape in plan view and a light-emitting surface that is planar;
A housing having a shape in which each of the light emitting tiles can be arranged in a matrix with the light emitting surfaces in the same direction;
A plurality of light emitting tile fixing bezels for fixing the light emitting tile;
With
The bezel has a bottom surface on which the light emitting tile is placed and has an outer shape substantially the same as that of the light emitting tile, and a side surface rising from an outer peripheral edge of at least two sides of the bottom surface. A planar light emitting device comprising a locking portion that can be locked to the housing, and another locking portion that can be partially locked to the housing.   The planar light emitting device according to claim 2, wherein the bottom surface of the bezel has a function of diffusing emitted light incident from the light emitting tile.   The light-emitting tile has a high-pressure portion closer to the inside light-emitting surface side, and the bezel can cover the high-pressure portion from the outside by placing the light-emitting surface side of the light-emitting tile on the bottom surface. The planar light-emitting device according to claim 2.   A rectangular bottom surface having a rectangular shape in plan view so that a light emitting tile having a rectangular shape in plan view arranged in a matrix can be placed in the housing, and at least rises substantially vertically from the outer periphery of the bottom surface and is on the bottom surface A locking portion having a shape that can be locked to the light emitting tile, and a light emitting tile that is locked to the casing in a state where the locking portion is locked to the light emitting tile placed on the bottom surface. A bezel for fixing a light emitting tile, comprising: another locking portion that is positioned and fixed at a predetermined position in the body.

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