JP2009218149A - Electrode draw out construction and flat-panel luminous device equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure an enough panel area for a plane light-emitting device by paying utmost attention in protecting a thin structure of the same as a whole, and also through simplifying of an outside wiring construction and through proper arrangement made in locating a unit individual light-emitting element reasonably close to those elements around it. <P>SOLUTION: The plane light-emitting device where a plurality of unit light-emitting elements are laid out in a length-to-width matrix is so structured that one end side of the electrode-draw-out terminal 11 is individually connected to an inner electrode 21 of each of the light-emitting elements, and, at same time, the other end side of the terminal 11 is extended from an opposite gap between side faces both unit light-emitting elements to a non-luminous panel surface 15a located on the other side of the luminous panel surface 13a, and then, the other end side of each of the draw-out terminals of both electrodes 11 extended and connected to the non-luminous panel surface 15a is commonly connected to a common electrode 25 located provided on an inside face an electrode support plate 9. <P>COPYRIGHT: (C)2009,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. More specifically, a plurality of unit light-emitting elements having a rectangular outer peripheral surface are arranged adjacent to each other in a vertical and horizontal matrix. The planar light emitting device according to the present invention relates to a structure in which the internal electrode of each unit light emitting element is led out to the outside using an electrode lead terminal.

  In a planar light emitting device as an image forming apparatus, the entire outer peripheral surface shape is a rectangular frame shape, and a plurality of unit light emitting elements whose outer peripheral surface shape is a rectangular shape or other shapes are vertically and horizontally arranged in the rectangular frame shape. There is one that is arranged adjacent to each other in a matrix and controls light emission and non-light emission of these unit light emitting elements (see Patent Document 1).

  Each of the plurality of unit light-emitting elements used in such a planar light-emitting device includes a front panel and a rear panel facing each other with the same external shape in plan view, and between the outer peripheral edges between the panels. The inside is sealed with the side panel interposed between the two, and the light emission source is installed in the inside.

In the case where an external lead terminal for performing power supply control such as voltage application to the internal electrode of each unit light emitting device in such a planar light emitting device is pulled out to the outside, there is no problem in thinning the entire planar light emitting device. In addition, it is desirable that the wiring configuration from the exterior is as simple as possible and does not cause inconvenience in handling. Furthermore, when a high voltage is applied to the internal electrode, it is necessary to electrically insulate the lead end portion of the electrode lead terminal.
JP 2007-280635 A

  Therefore, the problem to be solved by the present invention is that the planar light emitting device as described above has a thin structure of the entire planar light emitting device when the internal electrode of each unit light emitting element is pulled out using the electrode lead terminal. The light emitting panel as a planar light emitting device can be arranged in a relatively close state to the surrounding unit light emitting elements, while the external wiring configuration is simplified while the unit light emitting element is kept in close contact with the surrounding unit light emitting elements. The purpose is to ensure a sufficient area.

  The electrode lead-out structure of the planar light emitting device according to the present invention relates to each planar light emitting device in which a plurality of unit light emitting elements having a rectangular shape on the outer peripheral surface are arranged adjacent to each other in the vertical direction and / or the horizontal direction. The internal electrode of each light emitting element is pulled out to the outside using an electrode lead terminal, and one end side of the electrode lead terminal is individually connected to the internal electrode of each adjacent unit light emitting element. The other end side of each lead-out terminal is pulled out of the unit light emitting element and extended from the facing gap between the side surfaces of adjacent unit light emitting elements onto the non-light emitting panel surface of the unit light emitting element. The other end side of the electrode lead-out terminal extending upward is commonly connected to the common electrode.

  The planar light emitting device is an image forming device that controls the light emission of each unit light emitting element to form an image as a whole, or a backlight that is disposed on the back side of the liquid crystal display panel to illuminate the liquid crystal display panel. Etc. can be applied.

  The term panel may include plates and the like.

  In the present invention, when the internal electrode of each unit light emitting element is pulled out using the electrode lead terminal, the electrode lead terminal is pulled out to the non-light emitting panel surface side using the opposing gap of the unit light emitting element. The thin structure of the entire light emitting device is not hindered, and at the same time, the external wiring configuration for applying a voltage to the electrodes is simplified. In addition, in the present invention, when the internal electrode of each unit light emitting element is pulled out to the outside using the electrode lead terminal, the electrode lead terminal is pulled out to the non-light emitting panel surface side using the opposing gap of the unit light emitting element. The light emitting element itself can be arranged in a relatively close state to the surrounding unit light emitting elements, and a sufficient area of the light emitting panel as the planar light emitting device can be secured.

  In the present invention, a preferred embodiment is that the other end side of each electrode lead-out terminal for individually pulling out the internal electrode of each adjacent unit light-emitting element is within the facing gap between the opposing side surfaces of each of the unit light-emitting elements. That is, it extends from a different position on the non-light emitting panel surface opposite to the light emitting panel surface of the unit light emitting element.

  In this aspect, the other end side of each electrode lead-out terminal that is individually drawn out to the internal electrode of each adjacent unit light-emitting element is connected to the unit light emission from a different position in the opposing gap between the opposing side surfaces of the unit light-emitting elements. Since it extends on the non-light emitting panel surface opposite to the light emitting panel surface of the element, the electrode lead-out terminals do not overlap, and the unit light emitting element itself is arranged in a relatively close state with the surrounding unit light emitting elements. As a result, a sufficient area of the light emitting panel as the planar light emitting device can be secured.

  In the present invention, another preferable embodiment is that the other end side of each electrode lead-out terminal for individually pulling out the internal electrode of each adjacent unit light-emitting element is a pressing member on the non-light-emitting panel surface of the corresponding unit light-emitting element. And the other end side tip portion is elastically pressed against and connected to the common electrode.

  In this aspect, the other end side of each electrode lead-out terminal that individually pulls out the internal electrode of each adjacent unit light-emitting element is wound around the pressing member on the non-light-emitting panel surface of the corresponding unit light-emitting element. Since the electrode lead-out terminal can be prevented from coming off from the unit light emitting element, the tip of the other end is elastically pressed against the common electrode and connected to the common electrode lead-out terminal. Sufficient electrical connection and conduction with the electrode can be ensured.

  In another preferred embodiment of the present invention, the common electrode is provided on the inner surface side of the electrode holding plate having electrical insulation, and the opposing gap is covered from the outside by the electrode holding plate, and the voltage application portion is externally provided. Shielded from.

  In this aspect, the common electrode is provided on the inner surface side of the electrode holding plate having electrical insulation, and the electrode holding plate covers the facing gap from the outside and shields the voltage application portion from the outside. For example, when the electrode of the element has a high voltage, it is preferable that the high voltage portion is not exposed to the outside.

  In the present invention, still another preferred embodiment is a member that enters the opposing gap between the opposing side surfaces of each of the unit light emitting elements on the inner surface side of the electrode holding plate and positions the unit light emitting elements at a predetermined position. It is that.

  In this aspect, the unit light emitting elements arranged in a matrix can enter the respective opposing gaps and be positioned by the positioning member, which is a preferable structure for the planar light emitting device.

  In the present invention, another preferred embodiment is that the unit light-emitting element includes the front and rear panels facing each other in the same rectangular shape in plan view, and the outer peripheral edge between the panels. It is composed of a field emission type light emitting device in which the inside is sealed with a side panel interposed between the front panel, the phosphor and the anode electrode are provided on the inner surface of the front panel, and the electron emitter is provided on the inner surface of the rear panel. The front panel is a light-emitting panel surface, the rear panel is a non-light-emitting panel surface, and the electrodes are drawn to the non-light-emitting panel surface side by electrode lead terminals.

  In this aspect, the unit light emitting element can effectively exhibit the function of high luminance and uniform light emission, which is a characteristic as a field emission type light emitting element.

  In the present invention, another preferred embodiment is that a phosphor is provided on the inner surface of the front panel, a metal back is provided on the phosphor, and the metal back is also used as the electrode.

  In this embodiment, since the metal back can be used also as the anode electrode, the manufacturing process is simplified as compared with the case where the anode electrode is provided separately, which is preferable for reducing the manufacturing cost.

  A planar light emitting device according to the present invention is a planar light emitting device in which a plurality of unit light emitting elements having a rectangular shape on the outer peripheral surface are adjacent to each other and arranged in the vertical direction and / or the horizontal direction. In the electrode lead-out structure, the electrode inside each unit light emitting element is led out.

  In the electrode lead-out structure in the planar light emitting device of the present invention, light emission as the planar light emitting device is achieved so as not to obstruct the thin structure of the entire planar light emitting device as much as possible, and to simplify the external wiring configuration. In order to ensure a sufficient panel area, the internal electrodes of the respective unit light emitting elements can be drawn out to the outside using the electrode lead terminals.

  Hereinafter, an electrode lead structure of a planar light emitting device according to an embodiment of the present invention and a planar light emitting device having the structure will be described with reference to the accompanying drawings. FIG. 1 is an external view of the planar light emitting device. FIG. 2 shows a side cross-sectional configuration of the planar light emitting device, and FIG. 3 shows a planar configuration of the device casing in a state where the unit light emitting element is shown in phantom lines and the electrode holding plate is housed in the planar light emitting device. FIG. 4 is a perspective view showing a device housing in which the electrode holding plate is housed and a unit light emitting element housed in the device housing. FIG. 5 is an enlarged perspective view of the electrode holding plate. 6 is an enlarged perspective view of the unit light emitting device, FIG. 7 is an enlarged cross-sectional view of the main part of the planar light emitting device, and FIG. The main part is shown enlarged.

  With reference to these drawings, the planar light emitting device 1 includes a device housing 5 having a storage recess 3 having a rectangular shape in plan view, and a plurality of examples stored in the storage recess 3 of the device housing 5. Then, nine unit light emitting elements 7 and an electrode holding plate 9 disposed at the bottom of the housing recess 3 of the apparatus housing 5 are provided.

  Each unit light emitting element 7 has a rectangular shape on the outer peripheral surface, and is arranged in a vertical and horizontal matrix in a state adjacent to the storage recess 3 of the apparatus housing 5. In this case, the apparatus housing 5 may be configured so that the unit light emitting elements 7 are not arranged in a vertical and horizontal matrix but are arranged only in the vertical direction or only in the horizontal direction.

  The electrode holding plate 9 has a vertically long rectangular shape in plan view, and a plurality of (four in this example) are arranged at regular intervals on the bottom of the housing recess 3 of the apparatus housing 5 so that the anode electrode and the metal back of the unit light emitting element 7 are disposed. This is a plate for holding the electrode lead-out terminal 11 for drawing out the internal electrode also serving as the outside.

  Each unit light-emitting element 7 includes a pair of front and rear glass panels 13 and 15 facing each other in the same rectangular shape in plan view, and between the outer peripheral edges between the panels 13 and 15. The four resin side panels 17 having a rectangular shape in plan view are assembled into a thin cubic shape and the inside thereof is vacuum-sealed. The phosphor 19 and the internal electrode 21 are formed on the inner surface of the front panel 13. Is a field emission type light emitting device in which an electron emitter 23 made of a member having a field electron emission function is provided on the inner surface of the rear panel 15 so as to face the phosphor 19.

  Each unit light emitting element 7 also has the outer panel surface of the front panel 13 as the light emitting panel surface 13 a, the outer panel surface of the rear panel 15 as the non-light emitting panel surface 15 a, and the inner electrode 21 by the electrode lead-out terminal 11. The panel surface 15a is pulled out.

  One end side of the electrode lead-out terminal 11 is connected to the internal electrode 21 of the unit light-emitting element 7, and the other end side is drawn out from between the front panel 13 and the side panel 17 to the outside of the unit light-emitting element 7. Extending on the non-light-emitting panel surface 15a of the rear panel 15 from the opposing gap 22 formed between the panel 17 and the side panel 17 of the counterpart unit light emitting element 7 adjacent to the panel 17 and adjacent to the rear panel 14 Commonly connected to a tongue-like elastic common electrode 25 provided on the inner surface side of the concave portion of the electrode holding plate 9 mounted so as to straddle between the rear panel 15 of the side unit light emitting element 7 and the non-light emitting panel surface 15a. Yes.

  The electrode holding plate 9 is provided with a conductive metal plate 26 at the bottom of the inner surface of the recess 9a, and by cutting the conductive metal plate 26, a plurality of pairs of two common electrodes 25 facing in a tongue shape are provided. In the example, three pairs are formed. Further, the two pairs of common electrodes 25 of the electrode holding plate 9 connect the internal electrodes 21 of the two adjacent unit light-emitting elements 7 in common via the electrode lead-out terminals 11, so that the planar light-emitting device. Since the internal electrodes 21 of the entire unit light emitting elements 7 can be connected in common, for example, if a voltage is applied from one voltage application terminal 5 a provided in the apparatus housing 5, the entire planar light emitting device 1 The voltage application to the unit light emitting element 7 can be controlled, and this voltage wiring can be simplified.

  In this case, the electrode lead-out terminals 11 of the adjacent unit light emitting elements 7 are extended from the different positions in the facing gap 22 to the rear panel 15 and correspondingly elastic spring-like pairs opposed to each other in the form of tongues. The common electrodes 25 can be connected by pressure contact. Thus, the electrode lead terminals 11 of the adjacent unit light emitting elements 7 extend from the different positions in the facing gap 22 to the rear panel 15 and are press-connected to the pair of common electrodes 25, respectively. Are not overlapped in the opposing gap 22 and the opposing gap 22 of the unit light emitting element 7 can be narrowed to reduce the dark part, thereby improving the light emission quality.

  The other end side of the electrode lead-out terminal 11 is pressed by the pressing member 27 in a state of being wound around the holding member 27 having a rectangular cross section on the rear panel 15 and a long shape, and the tip portion of the other end side is elastically connected to the electrode. It is pressed and connected to the common electrode 25 on the inner surface of the holding plate 9. Thus, the other end side of the electrode lead terminal 11 is pressed by the pressing member 27 in a state of being wound around the pressing member 27, so that the electrode lead terminal 11 is difficult to be removed from the unit light emitting element 7, and the pulling strength can be secured. .

  The electrode holding plate 9 is made of an electrically insulating material, for example, an insulating resin material, and has an electrically insulating property, so that the electrode lead-out terminal 11, the common electrode 25, and the opposing gap 22 between the unit light emitting elements 7 are outside. The voltage application part is shielded from the outside. Further, on the inner surface side of the electrode holding plate 9, an elongated vertical plate-like positioning member 28 made of an insulating resin is erected and provided with a plate thickness corresponding to the opposing gap 22. When the electrode holding plate 9 is mounted, The positioning member 28 enters the opposing gap 22 of the unit light emitting element 7 so that the unit light emitting element 7 can be positioned at a predetermined position in the housing recess 3 of the apparatus housing 5. By this positioning, the vertical and horizontal matrix arrangement of the unit light emitting elements 7 can be prevented from being destroyed by vibration, impact, etc., so that the display quality and light emission quality of the planar light emitting device 1 can be improved.

  In the above-described embodiment, the planar light emitting device 1 constitutes an image forming apparatus that displays an image by controlling the voltage applied to the internal electrode 21 through the electrode lead terminal 11 by emitting light itself. For example, the liquid crystal display panel can be used as a backlight for illuminating the liquid crystal display panel. 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, when the internal electrode 21 of each of the plurality of unit light emitting elements 7 housed in the housing recess 3 of the apparatus housing 5 is pulled out using the electrode lead terminal 11, the adjacent unit light emitting element 7 are individually extended by the electrode lead-out terminals 11 from the opposing gaps of the unit light-emitting elements 7 onto the rear panel 15, and the other electrode lead-out terminals 11 extending on the non-light-emitting panel surface Since the end side is commonly connected to the common electrode 25 on the inner surface of the electrode holding plate 9, a thin structure of the entire planar light emitting device can be secured, while the external wiring configuration for simultaneously applying a voltage to the electrode is simple. In addition, the unit light emitting elements 7 themselves can be arranged in a relatively close state with the surrounding unit light emitting elements 7, and a sufficient area of the light emitting panel as a planar light emitting device can be secured. So as to.

FIG. 1 is a view showing the appearance of a planar light emitting device to which an electrode lead structure according to an embodiment of the present invention is applied. FIG. 2 is a diagram showing a side cross-sectional configuration of the planar light emitting device. FIG. 3 is a diagram showing a planar configuration of an apparatus housing in the planar light emitting device. FIG. 4 is an exploded perspective view showing components of the planar light emitting device. FIG. 5 is an enlarged view showing the electrode holding plate of the planar light emitting device. FIG. 6 is an enlarged view showing a unit light emitting element of the planar light emitting device. FIG. 7 is an enlarged view showing a cross section of the main part of the planar light emitting device. FIG. 8 is an enlarged view showing a main part of the unit light emitting device with the front panel omitted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Planar light-emitting device 3 Storage recessed part 5 Unit housing 7 Unit light emitting element 9 Electrode holding plate 11 Electrode extraction terminal 13 Front panel 13a Light emission panel surface 15 Rear panel 15a Non-light emission panel surface 17 Side panel 19 Phosphor 21 Internal electrode expense (anode) (Metal back)
22 Opposing gap 23 Electron emitter 25 Common electrode 27 Holding member 28 Positioning member

Claims (8)

With respect to a planar light emitting device in which a plurality of unit light emitting elements having a rectangular shape on the outer peripheral surface are arranged adjacent to each other in the vertical direction and / or the horizontal direction, the internal electrode of each unit light emitting element is used as an electrode lead terminal. The structure that pulls out to the outside,
One end side of each electrode lead-out terminal is individually connected to the internal electrode of each adjacent unit light-emitting element, while the other end side of each electrode lead-out terminal is drawn out of the unit light-emitting element and adjacent unit light-emitting elements are connected to each other. From the facing gap between the side surfaces, the unit light emitting element is extended on the non-light emitting panel surface, and the other end side of the electrode lead terminal extending on the non-light emitting panel surface is commonly connected to the common electrode. An electrode lead structure of the planar light emitting device.   The electrode lead-out terminal other end side from each adjacent unit light emitting element extends from a different position in the facing gap on a non-light emitting panel surface opposite to the light emitting panel surface of the unit light emitting element. Item 2. The structure according to Item 1.   The other end of each electrode lead-out terminal for individually pulling out the internal electrode of each adjacent unit light emitting element to the outside is pressed in a state where it is wound around the pressing member on the non-light emitting panel surface of the corresponding unit light emitting element. The structure according to claim 2, wherein a tip portion of the other end side is elastically pressed and connected to the common electrode.   The common electrode is provided on an inner surface side of an electrode holding plate having electrical insulation, and the opposing gap is covered from the outside by the electrode holding plate to shield a voltage application portion from the outside. Description structure.   5. The structure according to claim 4, wherein a member is provided on an inner surface side of the electrode holding plate so as to enter a facing gap between opposing side surfaces of the unit light emitting elements to position the unit light emitting elements at a predetermined position.   The unit light-emitting element is internally composed of a front panel and a rear panel facing each other in the same rectangular shape in plan view, and a side panel interposed between outer peripheral edges between the panels. The field emission type light emitting device is provided with a phosphor and an anode electrode on the inner surface of the front panel and an electron emitter on the inner surface of the rear panel. The front panel is a light emitting panel surface. 6. The structure according to claim 1, wherein the rear panel is a non-light-emitting panel surface, and the electrodes are led out to the non-light-emitting panel surface side by electrode lead terminals.   The structure according to claim 6, wherein a phosphor is provided on the inner surface of the front panel, a metal back is provided on the phosphor, and the metal back is also used as the electrode.   8. A planar light-emitting device in which a plurality of unit light-emitting elements having a rectangular outer peripheral surface are arranged adjacent to each other in a vertical direction and / or a horizontal direction, wherein the structure according to claim 1 is used. Then, a planar light-emitting device, wherein an electrode inside each unit light-emitting element is drawn out.

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