JP6592635B2 - LIGHTING DEVICE, CONNECTOR WITH FLAT, LIGHTING DEVICE MANUFACTURING METHOD, AND DISPLAY DEVICE - Google Patents

Description

The present invention relates to a lighting device including a substrate on which a light emitting element is mounted, a flat connector, a method for manufacturing the lighting device, and a display device including the lighting device.

  In recent years, liquid crystal display devices such as televisions have become widespread, the screen size of liquid crystal display devices has become larger, and the resolution of images displayed on the liquid crystal display devices has further improved. In recent years, higher contrast is required than higher resolution of images.

  By the way, a backlight device that illuminates a liquid crystal from the back and that includes a plurality of light emitting elements (LEDs) is known. In the conventional backlight device, on / off of a plurality of light emitting elements is collectively controlled, the transmittance of light emitted from the light emitting elements and irradiating the liquid crystal is controlled using the properties of the liquid crystal. However, since it is difficult to achieve high image contrast that is demanded in recent years only by control using the properties of liquid crystal, high contrast of the image is realized using a technique called local dimming. Yes. Local dimming is a technique for dividing a screen into sections and adjusting the amount of light emitted from the backlight device for each section. That is, the light quantity of the light emitting element is controlled for each section, and the light quantity of the light emitting element is adjusted according to the brightness of the image displayed in each section. For example, if the image displayed in one section is a bright image, the light amount of the light emitting element is increased. If the image displayed in the other section is a dark image, the light amount of the light emitting element is decreased. In addition to greatly improving the contrast of the displayed image, the power consumption of the backlight device can also be suppressed.

  In the light amount control for each section by local dimming, for example, the number of sections is about 80 sections, and the number of light emitting elements arranged in one section is about 4 to 5 (the light amount of 4 to 5 light emitting elements is collectively controlled). Since the number of electrodes (number of cores) was not large, a plurality of light emitting element substrates (substrates on which the light emitting elements are mounted) arranged on the surface side of the sheet metal and a control board (on the back side of the sheet metal) ( The board | substrate which controls the drive of a light emitting element) was connectable using the board-to-wire connector, the cable, etc.

  By the way, in order to achieve high image contrast, segmentation is progressing, and the development of a backlight device in which one light emitting element (the amount of light is controlled for each light emitting element) is arranged in one section is being promoted. Yes. In this case, the number of electrodes (number of cores) becomes enormous. For example, when connecting a plurality of light emitting element substrates and a control substrate using connectors, cables, etc., the number of cables becomes enormous and wiring processing is difficult. It becomes. In addition, for example, in order to avoid complicated wiring, there is provided means for reducing the number of connectors and cables that include one large light emitting element substrate instead of a plurality of light emitting element substrates and that connect the light emitting element substrate and the control substrate. Although present, a light-emitting element substrate having the same size as a large liquid crystal panel is expensive and not economical.

  Therefore, a lighting device (backlight device) has been proposed that includes a relay substrate that relays the electrical connection between the plurality of light emitting element substrates and the control substrate, and facilitates the electrical connection between the light emitting element substrate and the control substrate. (For example, refer to Patent Document 1). According to the illumination device described in Patent Document 1, a plurality of light emitting element substrates and a relay substrate are connected by a connector, and the relay substrate and the control substrate are connected by a cable or the like.

JP 2013-16325 A

  Incidentally, the light emitting element substrate, the relay substrate, and the control substrate expand and contract due to temperature changes. Conventionally, the position shift between the light emitting element substrate and the control board due to the expansion and contraction of the light emitting element substrate and the control board is absorbed by a cable or the like connecting the light emitting element substrate and the control board. However, when a relay board is relayed between the light emitting element board and the control board and the light emitting element board and the relay board are connected by a connector, the light emitting element board and the relay board between the light emitting element board and the relay board due to expansion and contraction. Therefore, there is a problem that the electrical connection between the light emitting element substrate and the relay substrate cannot be maintained well.

An object of the present invention is to maintain good electrical connection between a light emitting element substrate and a relay substrate even when a circuit board such as a light emitting element substrate and a relay substrate expands and contracts. To provide an illuminating device, a connector with a flat plate, a method for manufacturing the illuminating device, and a display device including the illuminating device that can maintain good electrical connection between a circuit board such as a relay board and a control board. .

  The lighting device according to the present invention includes a plurality of light emitting elements, a strip-shaped light emitting element substrate mounted on the predetermined surface, and a control for controlling driving of the light emitting element substrate and the light emitting elements. Relaying electrical connection with the substrate, and comprising a strip-shaped relay substrate disposed on the predetermined surface, and a connector for electrically connecting the light emitting element substrate and the relay substrate, the predetermined surface, The light emitting device substrate is located between the light emitting device substrate and the control substrate, and the light emitting device substrate is disposed with respect to the relay substrate such that the longitudinal direction of the light emitting device substrate intersects the longitudinal direction of the relay substrate, and the connector At least a part of the main body is disposed closer to the control board than the predetermined surface, and the connector is displaced between the relay substrate and the light emitting element substrate in a plane parallel to the predetermined surface. Misalignment to allow Characterized in that it comprises containers means.

  In the lighting device of the present invention, the connector includes a first connector having a first contact and a second connector having a second contact, and a contact surface of the second contact that contacts a contact portion of the first contact. Has a region that is parallel to the predetermined surface and that allows the movement of the contact portion in a plane parallel to the predetermined surface, and the positional deviation allowing means moves the contact portion in the region. Thus, the positional deviation is allowed.

  In the illumination device of the present invention, the connector includes a first connector having a first contact and a second connector having a second contact, and at least one of the first contact and the second contact is the predetermined surface. A flexible portion that follows the movement of at least one of the relay substrate and the light emitting element substrate in a plane parallel to the first substrate, and a first holding portion that is fixed to the relay substrate or the light emitting element substrate and holds one of the flexible portions. And a second holding part that holds the other of the flexible parts, and the positional deviation allowing means allows the positional deviation using the flexible part.

  The lighting device of the present invention is characterized in that the contact portion is allowed to move in a direction in which the region intersects a fitting direction in which the first connector and the second connector are fitted.

  The lighting device of the present invention is characterized in that the second connector is inserted into the first connector from a direction parallel to the predetermined surface or a direction inclined by a predetermined angle with respect to the predetermined surface.

  In the lighting device of the present invention, a plurality of third contacts arranged on a first surface of a first fitting portion where the first contact is fitted with a second fitting portion of the second connector, and the first contact. A plurality of fourth contacts disposed on a second surface of the first fitting portion facing or facing away from the surface, wherein the second contacts are electrically connected to the plurality of third contacts. A plurality of sixth contacts that are electrically connected to the contacts and the plurality of fourth contacts; a first contact portion that contacts the fifth contact is provided at one end of the third contact; A second contact portion that contacts the sixth contact is provided at one end of the contact, and the other end of the third contact and the other end of the fourth contact are connected to the light emitting element substrate or the relay substrate. Must be mounted on one side And features.

  In the illumination device according to the aspect of the invention, the arrangement pitch of the one end portions of the plurality of third contacts and the arrangement pitch of the one end portions of the plurality of fourth contacts may be different from those of the other end portions of the plurality of third contacts. The arrangement pitch is twice the arrangement pitch with the other end of the four contacts.

  In the illumination device of the present invention, the connector is a card edge connector.

  The lighting device of the present invention is characterized in that the second connector is formed integrally with the relay board.

  In the illumination device of the present invention, the light emitting element substrate is a single-sided substrate.

  The lighting device of the present invention includes a flat plate arranged on the predetermined surface, and the flat plate includes a first fixing portion that fixes the light emitting element substrate and a second fixing portion that fixes the relay substrate. It is characterized by that.

  Moreover, the illuminating device of this invention is provided with the hollow which accommodates at least one part of the main body of the said connector in the said flat plate.

  In the illumination device of the present invention, the first fixing portion fixes the connector side of the light emitting element substrate to the flat plate, and the second fixing portion fixes the central portion of the relay substrate to the flat plate. Features.

  In the illumination device of the present invention, a board-to-board connector for electrically connecting to the control board is mounted on the relay board, the board-to-board connector is a floating connector, and the flat plate An opening for arranging the floating connector is provided.

  In the lighting device of the present invention, a board-to-board connector for electrically connecting to the control board is mounted on the relay board, and the board-to-board connector includes the second fixing portion. Is mounted in the vicinity of the position fixed to the flat plate, and the flat plate is provided with an opening for arranging the board-to-board connector.

  The lighting device of the present invention electrically includes a plurality of light emitting elements, a circuit board on which a signal circuit from the light emitting elements is formed, and a control board that controls driving of the circuit board and the light emitting elements. A connector that is connected to and mounted on the circuit board; and a flat plate that is positioned between the circuit board and the control board and that fixes the circuit board. The flat plate has an opening for arranging the connector. Is provided.

  The lighting device of the present invention includes a board-to-board connector on which the connector is mounted on the control board, a board-to-wire connector that is electrically connected to the control board via an electric wire, and a flexible flat cable (FFC). It is electrically connected to any one of the FFC connectors electrically connected to the control board.

  In the illumination device of the present invention, the connector can be electrically connected to at least two of the board-to-board connector, the board-to-wire connector, and the FFC connector.

  The lighting device of the present invention is characterized in that the board-to-board connector is a floating connector.

  In the lighting device of the present invention, the circuit board is a light-emitting element board on which the plurality of light-emitting elements are mounted or a relay board that relays electrical connection between the light-emitting element board and the control board. .

  Further, the manufacturing method of the lighting device of the present invention is a manufacturing method of the lighting device for manufacturing the lighting device, wherein the connector mounted on the circuit board on which the signal circuits of the plurality of light emitting elements are formed, An arrangement step of arranging in an opening provided between a circuit board and a control board for controlling driving of the light emitting element and provided in a flat plate for fixing the circuit board; And a connection step of electrically connecting the circuit board and the control board via the connector.

  Moreover, the manufacturing method of the illuminating device of this invention is a manufacturing method of the illuminating device for manufacturing an illuminating device, Comprising: The 1st fixing process which arrange | positions the light emitting element board | substrate which mounts a some light emitting element on a flat plate, and fixes it. And a second fixing step for arranging and fixing the relay board for relaying the electrical connection between the light emitting element board and the control board for controlling the driving of the light emitting element on the flat plate, and mounted on the relay board. A fitting step of inserting the second connector into the first connector mounted on the light emitting element substrate from above with respect to the mounting surface of the light emitting element substrate on which the first connector is mounted. It is characterized by that.

  Further, the lighting device manufacturing method of the present invention is a lighting device manufacturing method for manufacturing a lighting device, and includes a light emitting element substrate on which a plurality of light emitting elements are mounted, and a control board for controlling driving of the light emitting elements. A relay substrate that relays the electrical connection is arranged on a flat plate and fixed; a second fixing step that arranges and fixes the light emitting element substrate on the flat plate; and a light emitting element substrate mounted on the light emitting element substrate. A fitting step of inserting the first connector into the second connector mounted on the relay board from above with respect to the mounting surface of the relay board on which the second connector is mounted, and fitting the second connector. It is characterized by.

  The display device of the present invention includes a liquid crystal panel and the illumination device of the present invention disposed on the back side of the liquid crystal panel.

According to the present invention, even when a circuit board such as a light-emitting element substrate and a relay board expands and contracts, the electrical connection between the light-emitting element board and the relay board can be maintained satisfactorily. It is possible to provide an illuminating device, a connector with a flat plate, a manufacturing method of the illuminating device, and a display device including the illuminating device that can maintain good electrical connection between a circuit board such as a relay board and a control board. .

1 is a perspective view showing a schematic configuration of a liquid crystal display device according to a first embodiment. It is a front view which shows the structure of the illuminating device which concerns on 1st Embodiment. It is a figure which shows the structure of the light emitting element substrate which concerns on 1st Embodiment. It is a figure which shows the structure of the relay board | substrate which concerns on 1st Embodiment. It is sectional drawing which shows the structure around the connector which concerns on 1st Embodiment. It is a figure for demonstrating the direction where the 2nd connector which concerns on 1st Embodiment is inserted in a 1st connector. It is a perspective view which shows the state before mounting the 1st connector which concerns on 1st Embodiment on a light emitting element board | substrate. It is a perspective view which shows the state before the 1st connector and 2nd connector which concern on 1st Embodiment fit. It is a perspective view which shows the state after the 1st connector and 2nd connector which concern on 1st Embodiment were fitted. It is an exploded view showing the composition of the 1st connector concerning a 1st embodiment. It is a top view which shows the structure of the 1st connector which concerns on 1st Embodiment. It is an expanded sectional view showing composition of a connector concerning a 1st embodiment. It is an expanded sectional view showing composition of a connector concerning a 1st embodiment. It is an expanded sectional view which shows the structure of the center part of the illuminating device which concerns on 1st Embodiment. It is a figure which shows the structure of the connector which electrically connects the light emitting element board | substrate and relay board | substrate which concern on 2nd Embodiment. It is an expanded sectional view which shows the structure of the center part of another illuminating device. It is a figure which shows the structure of the other connector which connects a relay board | substrate and a control board. It is a figure which shows the fitting state of the other connector and board | substrate to wire connector which connect a relay board | substrate and a control board. It is a front view which shows the structure of another illuminating device. It is a front view which shows the structure of another illuminating device. It is an expanded sectional view which shows the structure of another illuminating device. It is a figure for demonstrating the other arrangement | sequence of a light emitting element. It is a figure for demonstrating the other arrangement | sequence of a light emitting element. It is a figure which shows the other structure for fixing a light emitting element board | substrate to a sheet metal.

  Hereinafter, a lighting apparatus according to a first embodiment of the present invention will be described with reference to the drawings. The illumination device according to the first embodiment is mainly mounted on a liquid crystal display device or the like, and is used as a backlight device that illuminates liquid crystal from the back. FIG. 1 is a perspective view showing a schematic configuration of a liquid crystal display device such as a television. As shown in FIG. 1, the liquid crystal display device 1 includes a liquid crystal panel 2 and an illumination device according to the first embodiment. 3 and a control board 4. The illumination device 3 is disposed on the back side of the liquid crystal panel 2, and the control board 4 is disposed on the back side of the illumination device 3. The control board 4 controls the driving of the light emitting element 5 (see FIG. 2).

  In the following description, the XYZ orthogonal coordinate system shown in FIG. 1 is set, and the positional relationship of each member will be described with reference to this orthogonal coordinate system. The Z-axis is set in a direction orthogonal to the arrangement surface of the liquid crystal panel 2 and is set so that the front (image display surface) side of the liquid crystal panel 2 is in the + Z direction. The X axis is set in the horizontal direction when the liquid crystal panel 2 is viewed from the front, and the right direction when the liquid crystal panel 2 is viewed from the front is set to the + X direction. The Y axis is set in the vertical direction when the liquid crystal panel 2 is viewed from the front, and is set so that the upward direction when the liquid crystal panel 2 is viewed from the front is the + Y direction.

  FIG. 2 is a front view showing the configuration of the illumination device 3. As illustrated in FIG. 2, the lighting device 3 includes a plurality of light emitting elements (LEDs) 5, a plurality of light emitting element substrates 6, a relay substrate 7, a plurality of connectors 8, and a sheet metal 9. The plurality of light emitting elements 5 are mounted on the light emitting element substrate 6 at an equal pitch. In FIG. 2, the number of light emitting elements 5 mounted on the light emitting element substrate 6 is 80, but the number of light emitting elements 5 mounted on the light emitting element substrate 6 may be 79 or less or 81 or more.

  The light emitting element substrate 6 is arranged on the sheet metal 9 in the + X direction side and the −X direction side with the relay substrate 7 interposed therebetween, with the longitudinal direction directed in the X direction. The light emitting element substrate 6 is arranged on the sheet metal 9 with the longitudinal direction (X direction) of the light emitting element substrate 6 intersecting the relay substrate 7 with the longitudinal direction (Y direction) of the relay substrate 7. FIG. 3 is a diagram showing a configuration of the light emitting element substrate 6 arranged on the upper right side of FIG. As shown in FIG. 3, the light emitting element substrate 6 is a belt-like (about 20 mm width) single-sided substrate on which a plurality of light emitting elements 5 are mounted. A circular opening 12a is provided on the side of the connector 8 of the light emitting element substrate 6, that is, in the vicinity of the connector 8, and the end of the light emitting element substrate 6 on the + X direction side has a longitudinal direction in the X direction. An oval opening 12b is provided. When the light emitting element substrate 6 is disposed on the sheet metal 9, the first protrusion 10 (see FIG. 2) of the sheet metal 9 is inserted into the opening 12a, and the first protrusion 10 is covered with a nut. The connector side 8 of the light emitting element substrate 6 is fixed to the sheet metal 9. When the light emitting element substrate 6 is disposed on the sheet metal 9, the protrusion 22 (see FIG. 2) of the sheet metal 9 is inserted into the opening 12 b and the protrusion 22 is covered with a nut. The end on the + X direction side is attached to the sheet metal 9. The position of the opening 12a may not be on the connector 8 side of the light emitting element substrate 6. Two or more openings 12b may be provided.

  In addition, the structure of the other light emitting element substrate 6 arrange | positioned at the + X direction side is the same as the structure of the light emitting element substrate 6 shown in FIG. Further, the configuration of the plurality of light emitting element substrates 6 arranged on the −X direction side is the same as the configuration of the light emitting element substrate 6 shown in FIG. 3 with the center line in the longitudinal direction (Y direction) of the relay substrate 7 being axisymmetric. It is. In FIG. 2, the number of light emitting element substrates 6 arranged on the sheet metal 9 is 20, but the number of light emitting element substrates 6 arranged on the sheet metal 9 may be 19 or less or 21 or more.

  The relay substrate 7 is a sheet metal between the light emitting element substrate 6 on the + X direction side and the light emitting element substrate 6 on the −X direction side and in the central portion of the lighting device 3 (sheet metal 9) with the longitudinal direction directed in the Y direction. 9 is arranged. The relay substrate 7 is arranged on the sheet metal 9 with the longitudinal direction (Y direction) of the relay substrate 7 intersecting the longitudinal direction (X direction) of the light emitting element substrate 6 with respect to the light emitting element substrate 6. FIG. 4 is a diagram illustrating a configuration of the relay substrate 7. The relay substrate 7 is a belt-like double-sided substrate (a width smaller than the arrangement pitch of the light emitting elements 5), and relays the electrical connection between the light emitting element substrate 6 and the control substrate 4. A circular opening 24a is provided at the center of the relay substrate 7, and an oblong opening having a longitudinal direction in the Y direction is provided at the end of the relay substrate 7 + Y direction side and the −Y direction side. 24b is provided. When the relay substrate 7 is disposed on the sheet metal 9, the second protrusion 11 (see FIG. 2) of the sheet metal 9 is inserted into the opening 24 a, and the second protrusion 11 is covered with a nut. The central portion of the substrate 7 is fixed to the sheet metal 9. When the relay substrate 7 is disposed on the sheet metal 9, the projection 25 (see FIG. 2) of the sheet metal 9 is inserted into the opening 24 b and the projection 25 is covered with a nut so that ± Y of the relay substrate 7 is obtained. The end on the direction side is attached to the sheet metal 9. In FIG. 2, there is one relay substrate 7 disposed on the sheet metal 9, but two or more relay substrates 7 may be disposed on the sheet metal 9. Further, the position of the opening 24 a may not be the center of the relay substrate 7. One or three or more openings 24b may be provided.

  The sheet metal 9 is made of metal or the like and is disposed on a predetermined surface located between the light emitting element substrate 6 and the control substrate 4. The sheet metal 9 includes a columnar first protrusion 10 that is inserted into the opening 12 a of the light emitting element substrate 6 and a columnar protrusion 22 that is inserted into the opening 12 b of the light emitting element substrate 6. The first protrusion 10 functions as a first fixing portion that fixes the light emitting element substrate 6. That is, the first protrusion 10 is disposed on the side of the connector 8 of the light emitting element substrate 6 disposed on the sheet metal 9, that is, in the vicinity of the connector 8, and when the light emitting element substrate 6 is disposed on the sheet metal 9, the light emitting element The connector 8 side of the light emitting element substrate 6 is fixed to the sheet metal 9 by being inserted into the opening 12 a of the substrate 6. The protrusion 22 is disposed at a position corresponding to the opening 12 b of the light emitting element substrate 6. When the light emitting element substrate 6 is disposed on the sheet metal 9, the protrusion 22 is inserted into the opening 12 b of the light emitting element substrate 6. 6 is attached to the sheet metal 9 at the + X direction end or −X direction end. Therefore, even when the light-emitting element substrate 6 expands and contracts in the X direction due to a temperature change, the light-emitting element substrate 6 expands and contracts based on the position where the opening 12a is disposed, and the opening 12b extends in the X direction of the protrusion 22. Therefore, the light-emitting element substrate 6 is not bent or forcibly drawn. The position of the first fixing portion may not be on the connector 8 side of the light emitting element substrate 6. Two or more protrusions 22 may be provided for one light emitting element substrate 6.

  Further, the sheet metal 9 includes a circular second protrusion 11 that is inserted into the opening 24 a of the relay substrate 7 and two circular protrusions 25 that are inserted into the opening 24 b of the relay substrate 7. Yes. The second protrusion 11 functions as a second fixing portion that fixes the relay substrate 7. In other words, the second protrusion 11 is disposed at the center of the sheet metal 9, and when the relay substrate 7 is disposed on the sheet metal 9, the second protrusion 11 is inserted into the opening 24 a of the relay substrate 7, and the center of the relay substrate 7 is placed on the sheet metal. Fix to 9. The protrusion 25 is disposed at the center of the sheet metal 9 on the ± Y direction side. When the relay substrate 7 is disposed on the sheet metal 9, the protrusion 25 is inserted into the opening 24 b of the relay substrate 7, and the relay substrate 7 is disposed in the ± Y direction. The end on the side is attached to the sheet metal 9. Therefore, even if the relay substrate 7 expands and contracts in the Y direction due to a temperature change, the relay substrate 7 expands and contracts based on the position where the opening 24a is arranged, and the opening 24b moves in the Y direction of the protrusion 25. Therefore, the relay substrate 7 will not be bent or forcibly drawn. Note that the position of the second fixing portion may not be the central portion of the relay substrate 7. Two or more protrusions 25 may be provided.

  FIG. 5 is a cross-sectional view showing a state in which the periphery of the connector 8 arranged on the upper right side of FIG. 2 is viewed from the −X direction. As shown in FIG. 5, the sheet metal 9 is provided with a recess 13 that accommodates at least a part of the main body of the connector 8. The recess 13 is provided for each connector 8. Since at least a part of the main body of the connector 8 is accommodated in the recess 13, the upper surface (+ Z side surface) of the connector 8 does not protrude to the + Z direction side from the upper surface (surface on the + Z direction side) of the light emitting element 5. Therefore, since the connector 8 can prevent the light from the light emitting element 5 from being blocked, it is possible to prevent an adverse effect on the image displayed on the liquid crystal panel 2 due to the shadow of the connector 8, such as a decrease in contrast. . Further, an opening 30 (see FIG. 14) is provided in the vicinity of the center portion of the sheet metal 9. The configuration of the opening 30 will be described later. Moreover, in this 1st Embodiment, although the metal plate 9 which consists of metals etc. is provided, you may provide the flat plate which consists of materials other than a metal, for example, resin.

  The connector 8 electrically connects the light emitting element substrate 6 and the relay substrate 7. The connector 8 is a card edge connector, and includes a first connector 14 (see FIG. 5) mounted on the light emitting element substrate 6 and a second connector 15 (see FIG. 5) formed integrally with the relay substrate 7. Yes. A part of the main body of the connector 8 (first connector 14) is disposed closer to the control board 4 (see FIG. 1) than the surface (surface on the + Z direction side) of the sheet metal 9 disposed on the predetermined surface. That is, a part of the main body of the connector 8 is accommodated in the recess 13 of the sheet metal 9 as shown in FIG. It should be noted that at least a part of the main body of the connector 8 may be disposed on the control board 4 side from the surface of the sheet metal 9.

  FIG. 6 is a cross-sectional view showing a state in which the connector 8 arranged on the upper right side of FIG. 2 is viewed from the −Y direction, and the second connector 15 (second fitting portion 18) is the first connector 14 (first fitting). It is a figure for demonstrating the direction inserted in the fitting part 17). As shown in FIG. 6, the second connector 15 is inserted into the first connector 14 from a direction inclined by a predetermined angle θ (0 <θ <90) with respect to a predetermined surface (XY plane). The predetermined angle θ is desirably about 15 degrees. Further, the second connector 15 may be inserted into the first connector 14 from a direction (θ = 0) parallel to a predetermined plane (XY plane). Further, when the first fitting portion 17 is fitted with the second fitting portion 18, a space 28 (see FIG. 8) in which the second fitting portion 18 can move in the X fitting direction and the Y direction within the first fitting portion 17. 5 and FIG. 12).

  7 is a perspective view showing a state before the first connector 14 of the connector 8 arranged on the upper right side of FIG. 2 is mounted on the light emitting element substrate 6. FIG. 8 is a view of the connector 8 arranged on the upper right side of FIG. The perspective view which shows the state before the 1st connector 14 and the 2nd connector 15 fit, FIG. 9 is a 1st connector 14 and the 2nd connector 15 of the connector 8 which are arrange | positioned in the upper right of the paper surface of FIG. It is a perspective view which shows the state after having performed. FIG. 10 is an exploded view showing the configuration of the first connector 14. As shown in FIGS. 7 to 10, the first connector 14 includes a housing 23 made of an insulator, a plurality of (18 in this embodiment) first contacts 16, and the housing 23. It has two fixed nails 26 incorporated. The first contact 16 is disposed in the first fitting portion 17 of the housing 23. The first fitting portion 17 is fitted with the second fitting portion 18 of the second connector 15.

  The first contacts 16 are arranged on the first surface of the first fitting portion 17 on the + Z direction side, and a plurality of (in this embodiment, nine) third contacts 16 a and the first fitting portion 17 -Z. A plurality (nine in this embodiment) of fourth contacts 16b are provided on the second surface on the direction side (second surface opposite to the first surface). A first contact portion 20a that contacts the fifth contact 19a (see FIG. 7) of the second connector 15 is provided at one end of the third contact 16a, and a light emission is provided at the other end of the third contact 16a. A first mounting portion 21a to be mounted on the surface (mounting surface) on the + Z direction side of the element substrate 6 is provided. A second contact portion 20b that contacts a sixth contact (not shown) of the second connector 15 is provided at one end portion of the fourth contact 16b, and a light emitting element is provided at the other end portion of the fourth contact 16b. A second mounting portion 21b to be mounted on the surface (mounting surface) on the + Z direction side of the substrate 6 is provided. That is, the first mounting portion 21 a of the third contact 16 a and the second mounting portion 21 b of the fourth contact 16 b are mounted on one side (mounting surface) of the light emitting element substrate 6.

  As shown in FIG. 5, one end of the third contact 16a (on the first contact portion 20a side) is disposed on the first surface of the first fitting portion 17 at an equal pitch P1 (for example, 1.3 mm). One end portion (second contact portion 20b side) of the fourth contact 16b is disposed on the second surface of the first fitting portion 17 at an equal pitch P2 (= P1). The distance d in the Y direction between the first contact portion 20a of the adjacent third contact 16a and the second contact portion 20b of the fourth contact 16b is a half (for example, 0.65 mm) of the pitch P1 (pitch P2). In addition, one end portion of the third contact 16a (on the first contact portion 20a side) and one end portion of the fourth contact 16b (on the second contact portion 20b side) are arranged in a staggered manner in the YZ plane.

  11 is a top view showing the configuration of the first connector 14, FIG. 12 is an AA sectional view of FIG. 5 and an enlarged view showing the configuration of the connector 8, and FIG. 13 is a sectional view taken on line BB of FIG. FIG. 3 is an enlarged view showing the configuration of the connector 8. As shown in FIG. 11, the other end portion of the third contact 16a (on the first mounting portion 21a side) and the other end portion of the fourth contact 16b (on the second mounting portion 21b side) are alternately arranged at the equal pitch P3. It is mounted on the pad 27 of the light emitting element substrate 6. The pitch P3 is the same as the distance d shown in FIG. That is, the arrangement pitch P1 at one end of the third contact 16a and the arrangement pitch P2 at one end of the fourth contact 16b are equal to the arrangement pitch P3 between the other end of the third contact 16a and the other end of the fourth contact 16b. 2 times. Therefore, the third contact 16a and the fourth contact 16b do not need to be bent in the Y direction as shown in FIGS. 10, 12, and 13, and the configuration of the third contact 16a and the fourth contact 16b is not necessary. Can be easily. In addition, the mounting density of the second contacts 16 can be improved.

  In this embodiment, one end of the third contact 16a and one end of the fourth contact 16b are arranged in a staggered manner in the YZ plane, but they may be arranged in parallel. In this case, at least one of the third contact 16a and the fourth contact 16b needs to be bent in the Y direction. Further, in this embodiment, the light emitting element substrate 6 in a state where the end on the first mounting portion 21a side of the third contact 16a and the end on the second mounting portion 21b side of the fourth contact 16b are aligned in the Y direction. However, it may be arranged in a line in the Y direction anywhere between the central portion of the third contact 16a (fourth contact 16b) and the first mounting portion 21a (second mounting portion 21b). That's fine. That is, the end on the first mounting portion 21a side and the end on the second mounting portion 21b side do not have to be arranged in a line in the Y direction.

  Next, the configuration of the second connector 15 will be described. The second connector 15 is a card-type connector formed integrally with the relay substrate 7, and a plurality (18 in this embodiment) of second connectors that are electrically connected to the first contacts 16 of the first connector 14. A contact 19 is provided. The second contact 19 is disposed in a second fitting portion 18 that fits with the first fitting portion 17 of the first connector 14. The second contacts 19 are arranged on the first surface on the + Z direction side of the second fitting portion 18 (in this embodiment, nine) fifth contacts 19 a and -Z of the second fitting portion 18. A plurality (nine in this embodiment) of sixth contacts (not shown) are provided on the second surface on the direction side (second surface facing away from the first surface). The fifth contact 19 a is electrically connected to the third contact 16 a of the first connector 14, and the sixth contact is electrically connected to the fourth contact 16 b of the first connector 14.

  As shown in FIG. 7, the fifth contact 19a has a first contact surface that contacts the first contact portion 20a of the third contact 16a. The first contact surface is a predetermined surface (XY plane). It is a substantially parallel surface and is exposed in the + Z direction. As shown in FIG. 7, the first contact surface has a region that allows the movement of the first contact portion 20a in a plane (in the first contact surface) parallel to a predetermined surface (XY plane). That is, the region of the first contact surface is configured such that the first contact portion 20a can move within the first contact surface. The sixth contact (not shown) has a second contact surface that contacts the second contact portion 20b of the fourth contact 16b, and the second contact surface is a surface substantially parallel to a predetermined surface (XY plane). And exposed in the -Z direction. The second contact surface has a region that allows movement of the second contact portion 20b in a plane parallel to a predetermined surface (XY plane) (in the second contact surface). That is, the region of the second contact surface is configured such that the second contact portion 20b can move within the second contact surface.

  That is, the connector 8 is provided with a displacement allowance means for allowing a displacement between the relay substrate 7 and the light emitting element substrate 6 in a plane parallel to the predetermined plane, and the displacement allowance means includes the first contact portion 20a and By moving the first contact portion 20a and the second contact portion 20b within the region of the first contact surface and the second contact surface that allows the movement of the second contact portion 20b, the relay substrate 7 and the light emitting element substrate 6 are moved. Allow misalignment between. In particular, the region of the first contact surface and the second contact surface intersects the fitting direction in which the first connector 14 (first fitting portion 17) and the second connector 15 (second fitting portion 18) are fitted. The first contact part 20a and the second contact part 20b are configured to be movable in the direction of movement (Y direction). Therefore, even when the relay substrate 7 expands and contracts in the Y direction, the regions of the first contact surface and the second contact surface allow the positional displacement of the first contact portion 20a and the second contact portion 20b in the Y direction, and The electrical connection between the contact 16a and the fifth contact 19a and the electrical connection between the fourth contact 16b and the sixth contact (not shown) can be satisfactorily maintained. Similarly, even when the light emitting element substrate 6 expands and contracts in the X direction, the regions of the first contact surface and the second contact surface allow displacement of the first contact portion 20a and the second contact portion 20b in the X direction, The electrical connection between the third contact 16a and the fifth contact 19a and the electrical connection between the fourth contact 16b and the sixth contact (not shown) can be favorably maintained. In addition, when the light emitting element substrate 6 and the relay substrate 7 are extended, the light emitting element substrate 6, the relay substrate 7, and the connector 8 are prevented from colliding with those constituting the lighting device 3. Space that can move around is secured.

  14 is a cross-sectional view taken along the line C-C of FIG. As shown in FIG. 14, a board-to-board connector 29 for electrically connecting to the control board 4 is mounted on the surface on the −Z direction side of the relay board 7. The board-to-board connector 29 is mounted in the vicinity of the position where the relay board 7 is fixed to the sheet metal 9 by the second protrusion 11 (second fixing part) (in the present embodiment, in the vicinity of the center part of the relay board 7). Has been. The sheet metal 9 is provided with an opening 30 for arranging the board-to-board connector 29. The opening 30 is provided in the vicinity of the center of the sheet metal 9, and the board-to-board connector 29 protrudes from the opening 30 in the −Z direction. By connecting the board-to-board connector 29 and the mating connector 31 mounted on the surface on the + Z direction side of the control board 4, the relay board 7 and the control board 4 are electrically connected.

  Next, a method for manufacturing the lighting device 3 for manufacturing the lighting device 3 according to the first embodiment, which is a method for mounting the light emitting element substrate 6 and the relay substrate 7 on the sheet metal 9 will be described. First, the relay substrate 7 is arranged on the sheet metal 9 and fixed (first fixing step). In the first embodiment, the relay board 7 is arranged at the center of the sheet metal 9 with the longitudinal direction of the relay board 7 facing the Y direction, and the second protrusion 11 of the sheet metal 9 is formed in the opening 24 a of the relay board 7. The relay board 7 is fixed to the sheet metal 9 by inserting the nut and covering the second protrusion 11 with a nut. At this time, both ends of the relay substrate 7 are attached to the sheet metal 9 by inserting the protrusions 25 of the sheet metal 9 into the openings 24 b of the relay substrate 7 and covering the protrusions 25 with nuts.

  Next, a direction in which the first connector 14 mounted on the light emitting element substrate 6 is inclined with respect to the sheet metal 9 by a predetermined angle θ (see FIG. 6) to the second connector 15 formed integrally with the relay substrate 7. To be inserted and fitted (fitting process). Next, the light emitting element substrate 6 is disposed on the sheet metal 9 and fixed (second fixing step). In the first embodiment, the light emitting element substrate 6 is arranged on the ± X direction side of the sheet metal 9 with the relay substrate 7 interposed therebetween with the longitudinal direction of the light emitting element substrate 6 in the X direction, and the opening of the light emitting element substrate 6 is opened. The light emitting element substrate 6 is fixed to the sheet metal 9 by inserting the first protrusion 10 of the sheet metal 9 into the portion 12 a and covering the first protrusion 10 with a nut.

  Further, a method for manufacturing the lighting device 3 for manufacturing the lighting device 3 according to the first embodiment, which is a method of electrically connecting the relay board 7 and the control board 8 will be described. First, the board-to-board connector 29 mounted on the relay board 7 is placed in the opening 30 provided in the sheet metal 9 (placement process). Next, the relay board 7 and the control board 4 are electrically connected via the board-to-board connector 29 (connection process). Specifically, the relay board 7 and the control board 4 are electrically connected by fitting the board-to-board connector 29 and the mating connector 31 (see FIG. 14) mounted on the control board 4.

  According to the illuminating device 3, the manufacturing method of the illuminating device 3, and the liquid crystal display device 1 according to the first embodiment, the connector 8 is between the relay substrate 7 and the light emitting element substrate 6 in a plane parallel to a predetermined plane. Therefore, even if the light emitting element substrate 6 and the relay substrate 7 expand and contract due to a temperature change or the like, electrical connection between the light emitting element substrate 6 and the relay substrate 7 is provided. As a result, the electrical connection between the light emitting element substrate 6 and the control substrate 4 can be maintained well.

  Further, according to the lighting device 3, the manufacturing method of the lighting device 3, and the liquid crystal display device 1 according to the first embodiment, the board-to-board connector 29 is near the center of the relay board 7, that is, the relay board 7 is the first board. Since it is mounted in the vicinity of the position fixed to the sheet metal 9 by the two protrusions 11, even if the relay board 7 and the control board 4 expand and contract due to a temperature change or the like, the relay board 7 and the control board 4 The positional deviation between them can be minimized.

  In the lighting device 3 according to the first embodiment, the connector 8 is a card edge connector and the second connector 15 is formed integrally with the relay board 7. However, the card edge connector is a light emitting element. You may make it the structure provided with the 1st connector formed integrally with the board | substrate 6, and the 2nd connector mounted in the relay board | substrate 7. FIG.

  Moreover, in the illuminating device 3 which concerns on 1st Embodiment, although the connector 8 is a card edge connector, you may make it the structure provided with board | substrate to board connectors other than a card edge connector. For example, instead of the connector 8, a two-piece connector including a first connector having a first contact having a contact portion and a second connector having a second contact having a contact surface may be provided. When the two-piece connector is provided, the first connector is mounted on the light emitting element substrate 6 or the relay substrate 7, and the second connector is mounted on the relay substrate 7 or the light emitting element substrate 6. The first connector of the two-piece connector has a configuration in which the first surface of the first fitting portion where the third contact is disposed faces the second surface of the first fitting portion where the fourth contact is disposed (see FIG. 5). In this case, the second connector has a configuration in which the first surface of the second fitting portion in which the fifth contact is disposed faces away from the second surface of the second fitting portion in which the sixth contact is disposed. Become. Further, the first connector of the two-piece connector may be configured such that the first surface of the first fitting portion where the third contact is disposed faces away from the second surface of the first fitting portion where the fourth contact is disposed. In this case, the second connector has a configuration in which the first surface of the second fitting portion in which the fifth contact is disposed faces the second surface of the second fitting portion in which the sixth contact is disposed.

  Next, a lighting apparatus according to a second embodiment of the present invention will be described with reference to the drawings. In addition, about the illuminating device which concerns on this 2nd Embodiment, the same code | symbol is used for the structure same as the structure of the illuminating device 3 shown in FIG. 2, The illustration and description are abbreviate | omitted. In the following description, an XYZ orthogonal coordinate system similar to that shown in FIG. 2 is set, and the positional relationship of each part will be described with reference to this orthogonal coordinate system.

  The illuminating device according to the second embodiment is a backlight device that is mounted mainly on a liquid crystal display device or the like and illuminates liquid crystal from the back, similarly to the illuminating device 2 according to the first embodiment. Instead of the connector 8 according to the first embodiment (see FIG. 2), a floating connector 32 as shown in FIG. 15 is provided. Note that the floating connector 32 shown in FIG. 15 is a connector that electrically connects the light-emitting element substrate 6 and the relay substrate 7 disposed on the upper right side of FIG. The other floating connectors arranged on the + X direction side are the same as the floating connector 32 shown in FIG. Further, the configuration of the plurality of floating connectors arranged on the −X direction side is the same as the configuration of the floating connector 32 shown in FIG. 15 with the center line in the longitudinal direction (Y direction) of the relay substrate 7 being line symmetric.

  The floating connector 32 is a known floating connector, and includes a first connector 33 mounted on the light emitting element substrate 6 and a second connector 34 mounted on the relay substrate 7 as shown in FIG. The first connector 33 has a first contact 35, and the first contact 35 is formed by fitting the first fitting portion 39 to the second fitting portion 40 of the second connector 34 from above (+ Z direction). The second connector 34 is electrically connected to a second contact (not shown). The first contact 35 includes a flexible part 36, a first holding part 37, and a second holding part 38 that holds the other of the flexible part 36. The flexible portion 36 follows the movement of at least one of the relay substrate 7 and the light emitting element substrate 6 in a plane parallel to a predetermined plane (XY plane). The first holding part 38 is fixed to the light emitting element substrate 6 and holds one of the flexible parts 36. The floating connector 32 allows a positional shift between the relay substrate 7 and the light emitting element substrate 6 by using a flexible portion 36 as a positional shift allowing means. Also in this case, when the light emitting element substrate 6 and the relay substrate 7 are extended, the light emitting element substrate 6 and the relay substrate are prevented so that the light emitting element substrate 6, the relay substrate 7, and the floating connector 32 do not collide with those constituting the lighting device 3. 7 and a movable space around the floating connector 32 are secured.

  Next, a method of manufacturing the lighting device for manufacturing the lighting device according to the second embodiment, which is a method of attaching the light emitting element substrate 6 and the relay substrate 7 on the sheet metal 9 will be described. First, the relay substrate 7 is arranged on the sheet metal 9 and fixed (first fixing step). In the second embodiment, the relay board 7 is arranged at the center of the sheet metal 9 with the longitudinal direction of the relay board 7 oriented in the Y direction, and the second protrusion 11 of the sheet metal 9 is formed in the opening 24 a of the relay board 7. The relay board 7 is fixed to the sheet metal 9 by inserting the nut and covering the second protrusion 11 with a nut.

  Next, the light emitting element substrate 6 is disposed on the sheet metal 9 and fixed (second fixing step). In the second embodiment, the light emitting element substrate 6 is arranged on the ± X direction side of the sheet metal 9 with the relay substrate 7 interposed therebetween with the longitudinal direction of the light emitting element substrate 6 facing the X direction, and the opening of the light emitting element substrate 6 is opened. The light emitting element substrate 6 is fixed to the sheet metal 9 by inserting the first protrusion 10 of the sheet metal 9 into the portion 12 a and covering the first protrusion 10 with a nut. Next, the first connector 33 mounted on the light emitting element substrate 6 is connected to the second connector 34 mounted on the relay substrate 7, and the mounting surface (+ Z direction side) of the relay substrate 7 on which the second connector 34 is mounted. Are inserted from above and fitted (fitting process).

  According to the illuminating device, the manufacturing method of the illuminating device, and the liquid crystal display device according to the second embodiment, the position of the floating connector 32 between the relay substrate 7 and the light emitting element substrate 6 in a plane parallel to the predetermined surface. Due to the provision of the positional deviation allowing means for allowing the deviation, the electrical connection between the light emitting element substrate 6 and the relay substrate 7 is good even when the light emitting element substrate 6 and the relay substrate 7 expand and contract due to a temperature change or the like. Therefore, the electrical connection between the light emitting element substrate 6 and the control substrate 4 can be maintained well.

  In the lighting device according to the second embodiment, the floating connector 32 includes the first connector 33 and the second connector 34, and the first contact 35 of the first connector 33 includes the flexible portion 36 and the first holding portion. 37 and the second holding portion 38 are provided, but the second contact of the second connector 34 may include a flexible portion, a first holding portion, and a second holding portion. In this case, when the second fitting portion 40 of the second connector 34 is fitted to the first fitting portion 39 of the first connector 33 from above (+ Z direction), the first contact of the first connector 33 The second contact of the second connector 34 is electrically connected. Further, both the first contact 35 of the first connector 33 and the second contact of the second connector 34 may include a flexible part, a first holding part, and a second holding part. In this case, part of the positional deviation between the light emitting element substrate 6 and the relay substrate 7 can be allowed on one side and the other can be allowed on the other side. This is effective when the amount of positional deviation increases.

  Moreover, in the manufacturing method of the illuminating device when the second contact includes the flexible portion, the first holding portion, and the second holding portion instead of the first contact 35, first, the light emitting element substrate 6 is disposed on the sheet metal 9, Fix (first fixing step). Next, the relay substrate 7 is arranged on the sheet metal 9 and fixed (second fixing step), and the second connector 34 mounted on the relay substrate 7 is connected to the first connector 33 mounted on the light emitting element substrate 6. It inserts from the upper direction (+ Z direction) with respect to the mounting surface (surface on the + Z direction side) on which the first connector 33 of the light emitting element substrate 6 is mounted (fitting process).

  In the above-described first embodiment, the displacement between the relay substrate 7 and the light emitting element substrate 6 is allowed by moving the contact portion of the first contact within the contact surface of the second contact (the first contact). 1 position deviation allowing means), in the second embodiment described above, the position deviation between the relay substrate 7 and the light emitting element substrate 6 using the flexible part held by the first holding part and the second holding part. (Second misalignment allowing unit) may be combined with the first misalignment allowing unit and the second misalignment allowing unit. For example, a configuration may be adopted in which the first positional deviation permitting means allows the positional deviation in the X direction (Y direction) and the second positional deviation allowable means allows the positional deviation in the Y direction (X direction).

  Moreover, in the lighting device according to each of the above-described embodiments, the board-to-board connector 29 mounted on the relay board 7 protrudes from the opening 30 of the sheet metal 9 in the −Z direction, as shown in FIG. In addition, the board-to-board connector 29 may be configured not to protrude from the opening 30 of the sheet metal 9. Further, the mating connector 31 mounted on the control board 4 may be disposed in the opening 30 of the sheet metal 9 and protrude from the opening 30 in the + Z direction.

  In the lighting device according to each of the above-described embodiments, the board-to-board connector 29 is near the center of the relay board 7 (near the position where the relay board 7 is fixed to the sheet metal 9 by the second protrusion 11). Although mounted, the relay substrate 7 may be mounted at a position that is not in the vicinity of the position where the relay board 7 is fixed to the sheet metal 9 by the second protrusion 11. In this case, instead of the board-to-board connector 29, a board-to-board connector that functions as a floating connector is provided. This floating connector is a known floating connector (see, for example, Japanese Utility Model Publication No. 6-25904). The relay board 7 and the control board when the relay board 7 and the control board 4 expand and contract using the flexibility of the floating connector. A positional deviation between 4 and 4 is allowed.

  In the lighting devices according to the above-described embodiments, the board-to-board connector 29 that electrically connects the relay board 7 and the control board 4 is mounted on the relay board 7. Instead of this, a connector 41 as shown in FIG. 17 may be provided. As shown in FIG. 17, the connector 41 includes a board-to-board connector 42 mounted on the control board 4, a board-to-wire connector 44 electrically connected to the control board 4 (see FIG. 18) via the electric wires 43, and It is electrically connected to any one of FFC connectors 46 that are electrically connected to a control board (not shown) via a flexible flat cable (FFC) 45. The connector 41 is configured to be connectable to at least two of the board-to-board connector 42, the board-to-wire connector 44, and the FFC connector 46. For example, the connector 41 and the board-to-board connector 42 are fitted in the same manner as the board-to-board connector 29 and the mating connector 31 as shown in FIG. 14, and the connector 41 and the board-to-wire connector 44 are fitted as shown in FIG. Match. In this case, the degree of freedom in designing the lighting device and the liquid crystal display device can be increased. In the case where the connector 41 and the board-to-board connector 42 are fitted, at least one of the connector 41 and the board-to-board connector 42 is used in order to allow a positional shift between the relay board 7 and the control board 4. Floating connector.

  In the lighting devices according to the above-described embodiments, the board-to-board connector 29 that electrically connects the relay board 7 and the control board 4 is mounted on the relay board 7. It may replace with, and you may make it the structure provided with the board-to-wire connector or the connector for FFC. The fitting direction of the board-to-wire connector or the FFC connector may be a direction parallel to the XY plane as well as the Z direction. When the fitting direction is a direction parallel to the XY plane, the board-to-wire connector or the FFC connector needs to protrude from the opening 30 of the sheet metal 9 in the −Z direction. Further, the board-to-wire connector or the FFC connector may be configured to protrude in the −Z direction from the opening 30 of the sheet metal 9 when the fitting direction is the Z direction. In the FFC connector that directly inserts, it is necessary to protrude in the −Z direction from the opening 30 of the sheet metal 9 regardless of the fitting direction.

  In the lighting device and the manufacturing method of the lighting device according to each of the above-described embodiments, the board-to-board connector 29 (see FIG. 14) or the connector 41 (see FIG. 17) is mounted on the relay board 7, and the board The board-to-board connector 29 or the connector 41 (hereinafter referred to as the connector 41 or the like) is disposed in the opening 30 of the sheet metal 9, but in the case where only the light emitting element substrate 6 and the control board 4 are provided, the light emitting element A connector 41 or the like is mounted on the substrate 6, and the connector 41 or the like is disposed in the opening 30 of the sheet metal 9. In the case where two or more relay boards are interposed between the light emitting element substrate 6 and the control board 4, the connector 41 or the like is connected to the relay board electrically connected to the control board 4 by the connector 41 or the like. The connector 41 and the like are mounted in the opening 30 of the sheet metal 9. That is, the connector 41 or the like is mounted on any circuit board on which the signal circuit from the light emitting element 5 is formed, and the connector 41 or the like is disposed in the opening 30 of the sheet metal 9. Here, the circuit board on which the signal circuit from the light emitting element 5 is formed includes not only the circuit board on which the light emitting element 5 is mounted (the light emitting element substrate 6) but also the light emitting element 5 is not mounted. Also included are a circuit board (relay board 7) that relays signals from the circuit board and a circuit board (control board 4) that controls driving of the light-emitting element 5 although the light-emitting element 5 is not mounted.

  In addition, the lighting device according to each of the above embodiments includes one connector 41 or the like that electrically connects the relay board 7 and the control board 4, but includes two or more connectors 41 or the like. Also good. In addition, the lighting device according to each embodiment described above includes one control board 4 and one connector 41, but has a configuration including two or more control boards 4 and two or more connectors 41 and the like. May be. In these cases, it is effective when the number of electrodes (the number of cores) becomes enormous, but the connector 41 or the like is a floating connector, and the positional deviation between the relay board 7 and the control board 4 is allowed. There is a need to.

  In each of the above embodiments, the lighting device 3 in which the light emitting element substrate 6 and the relay substrate 7 are arranged on the sheet metal 9 as shown in FIG. 2 has been described as an example. For example, FIG. The present invention can also be applied to a lighting device 47 as shown. In the illuminating device 47 shown in FIG. 19, the relay substrate 7 is disposed at the end of the sheet metal 9 on the + Y direction side with the longitudinal direction in the X direction, and the light emitting element substrate 6 is below the relay substrate 7 (−Y direction side). Are arranged side by side on the sheet metal 9 with the longitudinal direction in the Y direction. The light emitting element substrate 6 is arranged on the sheet metal 9 with the longitudinal direction (Y direction) of the light emitting element substrate 6 intersecting the longitudinal direction (X direction) of the relay substrate 7 with respect to the relay substrate 7. In this case, the number of light emitting element substrates 6 can be reduced.

  For example, the present invention can be applied to an illumination device 48 as shown in FIG. FIG. 21 is a cross-sectional view taken along the line DD of FIG. As shown in FIGS. 20 and 21, a depression 51 a is formed on the −X direction side of the sheet metal 9, and a depression 51 b is formed on the + X direction side of the sheet metal 9. The recesses 51a and 51b have a rectangular shape having a longitudinal direction in the Y direction, and are provided to attach a frame for hanging the liquid crystal display device 1 to the outside. The illuminating device 48 includes two relay boards 7, and the two relay boards 7 are arranged and fixed in the recesses 51a and 51b with the longitudinal direction thereof in the Y direction. The light-emitting element substrate 6 is arranged on the sheet metal 9 in the + X direction side and the −X direction side with the longitudinal direction directed in the X direction. The relay substrate 7 and the light emitting element substrate 6 are electrically connected by a connector 52 as shown in FIG. The connector 52 is a known floating connector (see, for example, Japanese Utility Model Publication No. 6-25904), and allows positional displacement between the light emitting element substrate 6 and the relay substrate 7.

  In the illumination device according to each of the above-described embodiments, the light emitting elements 5 are mounted on the light emitting element substrate 6 in a line in the X direction. However, as illustrated in FIG. May be mounted in two rows in the X direction. As shown in FIG. 23, the light emitting elements 5 may be mounted on the light emitting element substrate 6 in three rows in the X direction. Further, four or more rows of light emitting elements 5 may be mounted on the light emitting element substrate 6 in the X direction.

  Moreover, in the illuminating device according to each of the embodiments described above, the first protrusion 10 and the protrusion 22 are provided on the sheet metal 9, and the first protrusion 10 and the protrusion 22 are formed as the openings 12 a of the light emitting element substrate 6. The light emitting element substrate 6 is fixed to the sheet metal 9 by being inserted into 12b. Further, the second protrusion 11 and the protrusion 25 are provided on the sheet metal 9, and the second protrusion 11 and the protrusion 25 are inserted into the openings 24 a and 24 b of the relay substrate 7, so that the relay substrate 7 is attached to the sheet metal 9. Although fixed, the light emitting element substrate 6 and the relay are formed using an adhesive or the like without providing the first protrusion 10, the second protrusion 11, the protrusions 22 and 25, and the openings 12a, 12b, 24a, and 24b. The substrate 7 may be fixed by bonding it to the sheet metal 9. Further, as shown in FIG. 24, a predetermined portion and a predetermined number of cut portions 49 obtained by cutting the sheet metal 9 and bent portions 50 obtained by performing reverse U-shaped bending processing on the metal plate 9 are provided. The light emitting element substrate 5 and the relay substrate 7 (not shown) may be fitted between the bent portion 50 and the light emitting element substrate 6 and the relay substrate 7 may be fixed to the sheet metal 9. In addition, the configuration according to each of the above-described embodiments (configuration in which the protruding portion of the sheet metal is inserted into the opening of the substrate), the adhesive, and the configuration illustrated in FIG. 24 (between the notch portion and the bent portion of the sheet metal) A configuration in which at least two of the configurations in which the substrate is fitted may be combined.

  Moreover, in the illuminating device according to each of the above-described embodiments, the light emitting element substrate 6 is a single-sided substrate, but may be a double-sided substrate or a multilayer substrate. In the lighting devices according to the above-described embodiments, the relay substrate 7 is a double-sided substrate, but may be a single-sided substrate or a multilayer substrate. Further, since the light emitting element 5 generates heat when it emits light, the light emitting element substrate 6 and the relay substrate 7 may be metal substrates having excellent heat dissipation.

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device, 2 ... Liquid crystal panel, 3, 47, 48 ... Illumination device, 4 ... Control board, 5 ... Light emitting element, 6 ... Light emitting element board, 7 ... Relay board, 8, 52 ... Connector, 9 ... Sheet metal DESCRIPTION OF SYMBOLS 10 ... 1st protrusion, 11 ... 2nd protrusion, 12a, 12b ... Opening part, 13 ... Depression, 14 ... 1st connector, 15 ... 2nd connector, 16 ... 1st contact, 16a ... 3rd contact, 16b ... 4th contact, 17 ... 1st fitting part, 18 ... 2nd fitting part, 19 ... 2nd contact, 19a ... 5th contact, 20a ... 1st contact part, 20b ... 2nd contact part, 21a ... 1st mounting part, 21b ... 2nd mounting part, 22, 25 ... Projection part, 23 ... Housing, 24a, 24b ... Opening part, 26 ... Fixed nail, 27 ... Pad, 28 ... Space, 29 ... Board-to-board connector, 30 ... opening, 31 ... mating connector, 32 ... flow Connector, 33 ... first connector, 34 ... second connector, 35 ... first contact, 36 ... flexible portion, 37 ... first holding portion, 38 ... second holding portion, 39 ... first fitting portion, 40 ... 2nd fitting part, 41 ... Connector, 42 ... Board-to-board connector, 43 ... Electric wire, 44 ... Board-to-wire connector, 45 ... FFC, 46 ... Connector for FFC, 49 ... Cutting part, 50 ... Bending part, 51a, 51b ... depressions.

Claims (14)

A plurality of light emitting elements;
A circuit board on which a signal circuit from the light emitting element is formed;
Electrically connecting the circuit board and a control board for controlling driving of the light emitting element, and a connector mounted on the circuit board;
A flat plate positioned between the circuit board and the control board and fixing the circuit board;
With
The flat plate is provided with an opening for arranging the connector ,
The said connector fits from the direction along the direction orthogonal to the surface of the said flat plate, and the other party connector electrically connected with the said connector . The lighting device according to claim 1, wherein a fitting portion of the connector that fits with the mating connector does not protrude from a surface of the flat plate on the control board side. The connector board-to-board connector, board to wire connectors, and a lighting device according to claim 1 or claim 2, wherein to any one electrical connection of the connector for a flexible flat cable. The lighting device according to claim 3 , wherein the connector is electrically connectable to at least two of the board-to-board connector, the board-to-wire connector, and the flexible flat connector. The lighting device according to claim 3 or 4 , wherein the board-to-board connector is a floating connector. The circuit board of claim 1 to claim 5, characterized in that a relay board which relays electrical connection between the light emitting element substrate or the light emitting element substrate and the control substrate mounting the plurality of light emitting elements The lighting device according to any one of the above.   A circuit board;
  A flat plate for fixing the circuit board;
  A connector mounted on the circuit board,
  The flat plate is provided with an opening for arranging the connector,
  A connector with a flat plate, wherein the connector is configured to be electrically connectable to at least two of a board-to-board connector, a board-to-wire connector, and a flexible flat cable connector after being arranged in the opening.   8. The flat connector according to claim 7, wherein the board-to-board connector is a floating connector.   A signal circuit from a light emitting element is formed on the circuit board,
  The flat plate is disposed between the circuit board and a control board that controls driving of the light emitting element,
  The flat connector according to claim 7 or 8, wherein the connector electrically connects the circuit board and the control board.   The flat-plate connector according to claim 9, wherein the circuit board is a light-emitting element board on which the light-emitting element is mounted or a relay board that relays electrical connection with the control board. A method of manufacturing a lighting device for manufacturing a lighting device,
A connector mounted on a circuit board on which signal circuits of a plurality of light emitting elements are formed is provided on a flat plate that is positioned between the circuit board and a control board that controls driving of the light emitting elements and fixes the circuit board. An arrangement step of arranging in the opened opening;
By fitting the connector disposed in the opening in the placement step from a mating connector that is electrically connected to the connector, and a direction along a direction perpendicular to the plane of the flat plate, A connection step for electrically connecting the control board;
The manufacturing method of the illuminating device characterized by including. A method of manufacturing a lighting device for manufacturing a lighting device,
A first fixing step of arranging and fixing a light emitting element substrate on which a plurality of light emitting elements are mounted on a flat plate;
A second fixing step of disposing and fixing a relay substrate on the flat plate for relaying an electrical connection between the light emitting element substrate and a control board for controlling driving of the light emitting element;
The second connector mounted on the relay substrate is inserted into the first connector mounted on the light emitting element substrate from above with respect to the mounting surface of the light emitting element substrate on which the first connector is mounted. Mating process to be combined,
The manufacturing method of the illuminating device characterized by including. A method of manufacturing a lighting device for manufacturing a lighting device,
A first fixing step in which a relay substrate that relays electrical connection between a light emitting element substrate on which a plurality of light emitting elements are mounted and a control substrate that controls driving of the light emitting elements is disposed on a flat plate and fixed;
A second fixing step of arranging and fixing the light emitting element substrate on the flat plate;
The first connector mounted on the light emitting element substrate is inserted into the second connector mounted on the relay substrate from above with respect to the mounting surface of the relay substrate on which the second connector is mounted, and is fitted. A mating process to
The manufacturing method of the illuminating device characterized by including. LCD panel,
The lighting device according to any one of claims 1 to 6 , which is disposed on the back side of the liquid crystal panel,
A display device comprising:

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