JP2006154320A - Display device and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device for which an LED is arranged on an optimal position with respect to a light incident face of a light guide plate without being accompanied by a complicated operation, and further the LED is not simply detached from the optimal position due to an external shock and so on. <P>SOLUTION: The LED 24 is fixed by: mounting an LED storing portion 47 having an opening 47a opposite to the light incident face 31a of the light guide plate 31 on a frame body 40; making a rear side adhesive layer 53 of a sheet 50 with an adhesive attached thereto face the LED storing portion 47; connecting a flexible wiring board 20 to a terminal portion of a liquid crystal panel 10; connecting an LED implementation portion 23 which is bent to the lighting device 30 side and placed opposite to the LED storing portion 47 to the flexible wiring board 20; implementing the LED 24 in the LED implementation portion 23; storing the LED 24 in the LED storing portion 47; and making the LED 24 be stuck to the rear side adhesive layer 53. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device such as a liquid crystal display device and an illumination device used for the display device and the like.

  In general, a liquid crystal display device having a liquid crystal display panel, a light guide plate disposed behind the liquid crystal display panel, and a light source disposed on the side of the light guide plate so as to face the end surface of the light guide plate is known. In this liquid crystal display device, the light emitted from the light source enters the light guide plate from the end face, is refracted in the light guide plate, is irradiated from the front surface of the light guide plate to the liquid crystal display panel, and passes through the liquid crystal display panel. Finally, the light is emitted to the front side (display side) of the panel.

  A liquid crystal display device as an example of a conventional display device is described in Patent Document 1, and as shown in FIG. 12, a support 111 made of synthetic resin or the like and an engagement with the support 111 The fixed light guide plate 112, the reflective sheet 113 disposed behind the light guide plate 112, the frame-shaped adhesive sheet 114 disposed on the front surface (the upper surface in the drawing) of the light guide plate 112, and the adhesive And a liquid crystal display panel 120 disposed on the front side of the attached sheet 114.

  The liquid crystal display panel 120 is a liquid crystal display panel 120 in which two transparent substrates 121 and 122 made of glass or the like are bonded together by a sealing material 123 and a liquid crystal 124 is sealed between the transparent substrates 121 and 122 and inside the sealing material 123. is there. Polarizing plates 125 and 126 are attached on the outer surfaces of the transparent substrates 121 and 122. A semiconductor chip 127 constituting a liquid crystal driving circuit is mounted on the end of the transparent substrate 121.

  A flexible wiring board 115 is connected to the liquid crystal display panel 120, and a wiring pattern (not shown) is formed on the flexible wiring board 115. As shown in FIG. Panel-side terminal portion 115a, and a connector directly connected to an external circuit board (which means external to a display panel or a liquid crystal panel) installed inside an electronic device or the like or mounted on the external circuit board And an input terminal portion 115b that is electrically connected to each other. On the flexible wiring board 115, an LED (light emitting diode) 116 that is a light source that emits light to the light guide plate 112, a power supply circuit 117 that is used to drive the liquid crystal display panel 120, and the like are mounted.

  The flexible wiring board 115 is disposed at the bottom of the support 111 and is along the reflection sheet 113 disposed behind the light guide plate 112. The LED 116 is an insertion provided on the support 111. The light guide plate 112 is inserted in the portion 111 </ b> A and is close to the light incident surface portion 112 a on one end surface.

JP 2003-149672 A

In the above-described conventional liquid crystal display device, the LED 116 is inserted but not fixed in the insertion portion 111A provided on the support 111, and the LED 116 is subjected to external impact such as vibration or dropping applied to the liquid crystal display device. However, it has become unreliable due to peeling from the flexible wiring board 115 or colliding with the light guide plate 112. When the LED 116 is fixed,
The dimensions of the insertion portion 111A for inserting the LED 116 must be accurately matched to the LED 116, and there is a problem that the production yield and the cost of the mold increase.

  The present invention solves the above-mentioned problems, and the first object is to arrange the LED at an optimal position with respect to the light incident surface of the light guide plate without complicated work. In addition, it is an object of the present invention to provide a display device that does not cause peeling due to an external impact or the like and whose optimum position cannot be easily removed.

Further, the second object of the present invention is that the LED can be arranged at an optimum position with respect to the light incident surface of the light guide plate without complicated work, and further, peeling due to an external impact or the like occurs. It is an object to provide an illuminating device in which the optimum position is not easily deviated.

  In order to solve the above problems, the present invention includes a light guide plate member having a light incident surface and a light output surface in directions intersecting each other, and an LED (light emitting diode) disposed on the incident surface side of the light guide member. In a display device in which a display panel is disposed on the light exit surface side of the light guide member of the lighting device, the plate member is disposed in proximity to the light exit surface of the light guide member, and the plate member is guided. In the display device, an adhesive is provided on the surface of the optical member, and the light guide member and the LED are bonded to the adhesive of the plate-like member.

  In order to solve the above problem, the present invention is provided with a second opening for housing an LED (light emitting diode) in a part of a frame having a first opening in which a light guide member is disposed. In the display device in which a display panel is disposed on the light exit surface side of the light guide member of the illumination device in which the light guide member and the LED are disposed adjacent to each other in a plane on the frame body, The display device is characterized in that a plate-like member having an adhesive layer on a member-side surface is disposed so as to straddle the frame and the LED, and the LED is supported using the frame.

  Furthermore, the plate-like member is a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet.

  Furthermore, the display device is characterized in that a flexible wiring board for mounting the LED is disposed on the surface of the LED opposite to the surface of the LED bonded to the plate-like member.

    Furthermore, the flexible wiring board on which the LED is mounted is also electrically connected to the display panel.

    Further, the display device is characterized in that the flexible wiring board is electrically connected to an external circuit board.

    Furthermore, the flexible wiring board has a second board part extending in an L shape from one side of the long side of the first board part having a rectangular shape, and the second board part on the opposite side to the first board part. The display device is characterized in that the tip of the second substrate portion has a substantially T-shape, and the LED is mounted in the vicinity of the tip portion of the substantially T-shape.

    Furthermore, the flexible wiring board has a second board part extending in an L shape from one side of the long side of the first board part having a rectangular shape, and the second board part on the opposite side to the first board part. The display device is characterized in that the tip of the second substrate portion further has a substantially L-shape, and the LED is mounted in the vicinity of the tip portion of the substantially L-shape.

  Furthermore, the display panel is a liquid crystal display panel which is a display panel using liquid crystal.

In order to solve the above problems, the present invention provides a light guide plate member having a light incident surface and a light output surface in directions intersecting each other, and an LED (light emitting diode) disposed on the incident surface side of the light guide member. In a lighting device having
A plate-like member having an adhesive layer on the surface of the light guide member and having an extending portion extending to the light source side is disposed close to the emission surface of the light guide member, and the plate-like member The light guide member and the LED are bonded to the adhesive.

  In order to solve the above problem, the present invention is provided with a second opening for housing an LED (light emitting diode) in a part of a frame having a first opening in which a light guide member is disposed. Further, in the lighting device in which the light guide member and the LED are disposed adjacent to each other in a planar manner on the frame body, a plate-like member having an adhesive layer on at least the light guide member side surface is provided with the frame body and the frame body. It is an illuminating device that is arranged so as to straddle the LEDs and supports the LEDs using the frame.

Furthermore, the plate-like member is a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet.

  According to the display device of the present invention, since the light source (for example, LED) is fixed using the adhesive layer or the adhesive layer of the adhesive-attached sheet attached by attaching the light guide plate to the frame, the LED is complicated. It can be placed at the optimum position with respect to the light incident surface of the light guide plate without any work, and there is no occurrence of LED mounting position deviation or peeling from the mounting board due to external impact, etc., and the optimum position is simple You can prevent it from coming off. In addition, it does not require a new light source (for example, LED) fixing means, and the work is facilitated, and the cost can be reduced.

  Moreover, according to the display device according to the present invention, the LED mounted on the LED mounting portion of the flexible wiring board with the back side adhesive layer of the pressure-sensitive adhesive sheet attached to the frame body attached to the frame body facing the LED storage portion. When the LED is stored in the LED storage portion, the LED can be fixed by adhering the LED to the back side adhesive layer. For this reason, the LED can be placed at an optimum position with respect to the light incident surface of the light guide plate without complicated work, and the LED mounting position shifts due to external impacts, peeling from the mounting substrate, etc. It is possible to prevent the optimum position from easily deviating. In addition, no new LED fixing means is required, the work is facilitated, and the cost can be reduced.

  Moreover, according to the display device according to the present invention, in addition to fixing the LED by adhering the LED to the adhesive back side adhesive layer when the LED is accommodated in the LED accommodating portion, in the FPC By fixing the both ends and the middle part of the LED mounting part to the frame body, the fixing of the LED becomes stronger.

  Moreover, according to the display device according to the present invention, when the drawing piece portion and the LED mounting portion are processed from the flexible wiring board, the drawing piece portion and the LED mounting portion are substantially T-shaped, that is, a hammer head shape. However, the portions located on both sides of the lead part of the flexible wiring board were discarded as unnecessary FPC parts. However, since the lead part and the LED mounting part are FPCs having a substantially L shape, they are discarded. The part becomes one place, and the effect of cost reduction is obtained.

Moreover, according to the illuminating device which concerns on this invention, since the light source (for example, LED) is fixed using the contact bonding layer of the sheet | seat with an adhesive which attaches a light-guide plate to a frame body, complicated operation | work is carried out. It is possible to arrange the light guide plate at an optimum position with respect to the light incident surface of the light guide plate, and to prevent the optimum position from easily deviating without occurrence of peeling due to an external impact or the like. In addition, a new light source (for example, LED) fixing means is not required, and the work is facilitated, resulting in a cost reduction effect.

Hereinafter, embodiments of a display device according to the present invention will be described with reference to the following drawings.
1 is a perspective view schematically showing the display device according to the present invention, FIG. 2 is a plan view of the illumination device in the display device, FIG. 3 is a perspective view of the illumination device in an exploded state, and FIG. FIG. 5 is a cross-sectional view of the display device according to the present invention, in which a part of the display device is omitted, and FIG. 6 is an explanatory view of a state in which the LEDs are housed in the LED housing portion of the frame. FIG. 8 is an explanatory diagram of a discarding part of the flexible wiring board when the drawing piece part and the LED mounting part are substantially T-shaped when processing the drawing piece part and the LED mounting part from the flexible wiring board, FIG. FIG. 9 is an explanatory diagram of a discarded portion of the flexible wiring board when the drawing piece portion and the LED mounting portion are substantially L-shaped when the drawing piece portion and the LED mounting portion are processed from the flexible wiring board. Of the frame when the part and the LED mounting part are substantially L-shaped It is an explanatory view of a state in which housing the LED in the ED storage unit.

As a display panel of the display device 100 according to the present invention, there is a typical liquid crystal display panel, and a picture, a character, a symbol, a sign, or the like is printed or handwritten on a transparent plate member such as an acrylic material, a plastic material, or a glass material. It may be a member on which is drawn. An embodiment of the present invention will be described using a liquid crystal display panel that has been used most recently as a display device. However, as described above, the present invention can be used other than the liquid crystal penel and the effects of the present invention can be obtained.
As shown in FIG. 1, a display device 100 according to the present invention is disposed on a liquid crystal panel 10, a flexible wiring board 20 connected to the liquid crystal panel 10, and the back side (non-display surface side) of the liquid crystal panel 10. The illumination device 30 is generally configured.

  The liquid crystal panel 10 includes a liquid crystal cell 11, a first polarizing plate 18 disposed on the display side P, and a second polarizing plate 19 disposed on the opposite side. The liquid crystal cell 11 is formed by bonding two transparent substrates 12 and 13 together with a sealing material (not shown), and encapsulating liquid crystals (not shown) between the transparent substrates 12 and 13 and inside the sealing material. It is. Transparent electrodes (not shown) are formed on the inner surfaces of the transparent substrates 12 and 13 facing each other, and the liquid crystal changes its alignment state according to the voltage applied between these transparent electrodes. is there.

  A protruding portion 16 is formed on the transparent substrate 13, and a semiconductor chip 17 constituting a liquid crystal driving circuit is mounted on the protruding portion 16. A wiring pattern (not shown) is drawn from the transparent electrode, and this wiring pattern is connected to the semiconductor chip 17 by anisotropic conductive connection or conductive connection.

  As shown in FIG. 1, the flexible wiring board 20 is anisotropically conductively connected or conductively connected to a terminal portion (not shown) of the overhanging portion 16 of the liquid crystal panel 10 at a panel side terminal portion 21a at one end thereof. And the other end portion has an input terminal portion 21b to be inserted into a connector provided on a control circuit board (not shown). The flexible wiring board 20 has an LED mounting portion (hammer head portion) 23 continuously provided through a drawing piece portion 22 projecting from the one side 20a to the side at a substantially right angle. The piece portion 22 and the LED mounting portion 23 are substantially T-shaped, and one LED 24 as a light source is mounted at the center on the LED mounting portion 23. An IC 25, which is an integrated circuit for driving LEDs, is mounted on the flexible wiring board 20.

As shown in FIGS. 2 and 3, the illuminating device 30 includes a light guide plate 31 having approximately the same size as the liquid crystal panel 10, the above-described LED 24, and a light diffusion disposed on the light emitting surface 31 b side of the light guide plate 31. The plate 32, the two-layer prism sheets 35 and 36, the reflection plate 33 disposed on the back surface facing the light emitting surface 31b of the light guide plate 31, the frame 40, and a sheet as an example of a sheet with an adhesive And an adhesive-attached sheet 50 that shields the light of the shape. In the present invention, the sheet with the pressure-sensitive adhesive may be a sheet with a pressure-sensitive adhesive such as transparent or white.
Alternatively, using a sheet for a light shielding sheet or a spacer (to be disposed on the light guide plate and providing a gap with the light guide plate upper plate member), etc., using a member provided with an adhesive layer on the lower surface of these sheets, The LED 24 is adhered to the adhesive as described above. The spacer sheet may be transparent, white, colored, light-shielding film printed, or light-shielding sheet itself, and the effects of the present invention can be obtained. Can do.
On the other hand, when a light diffusing member (sheet-like or plate-like) is disposed above the LED, the LED is attached to the light-shielding sheet of FIG. 5 on the adhesive provided on the lower surface of the light diffusing member. The effect of the present invention can be obtained.
Further, when a prism member (sheet-like, plate-like, prism sheet) is disposed above the LED, the LED is attached to the light-shielding sheet of FIG. The effect of the present invention can be obtained.
Further, a frame-like adhesive material may be provided on the lower surface or upper surface of the prism sheet or the diffusion sheet, and the LED may be attached to the adhesive material or the adhesive material as if attached to the light shielding sheet of FIG. The effect of can be obtained.

As described above, the present invention provides a light guide plate having the light incident surface 31a and the light output surface 31b in a direction intersecting each other, that is, the upper surface (light emitting surface) and the side surface (light incident surface) of the light guide member having a plate shape. In the illumination device 30 having the member 31 and the LED (light emitting diode) 24 disposed on the light incident surface side of the light guide member 31, the light source 24 has an adhesive layer on the light guide member 31 side. A plate-like member (for example, a sheet with an adhesive 50) having an extending portion extending to the side is disposed in the vicinity of the light emitting surface 31b of the light guide member 31, and the adhesion of the plate-like member 50 is performed. The illumination device is characterized in that the light guide member 31 and the LED 24 are bonded to a material 53.
Furthermore, the plate-shaped member is a lighting device that may be a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet.

The present invention also provides a second opening (LED) that houses an LED (light emitting diode) in a part of the frame (40) having the first opening (41) in which the light guide member (31) is disposed. 47a) In the illuminating device in which the light guide member and the LED (light emitting diode) (24) are disposed adjacent to each other in a plane on the frame body provided with 47a), at least the light guide member side is bonded A lighting device characterized in that a plate-like member having a layer is disposed so as to straddle the frame and the LED (24), and the LED (24) is supported using the frame (40). is there.
Furthermore, the plate-like member is an illumination device that may be any of a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet, and the effects of the present invention can be obtained.

  One end surface of the light guide plate 31 is a light incident surface 31a, and an adhesive portion 31c is formed on the light incident surface 31a side of the surface. The surface of the light guide plate 31 excluding the bonding portion 31c is a light emitting surface 31b, and the light emitting surface 31b is one step lower than the bonding portion 31c.

The light diffusing plate 32 has a quadrangular shape having side portions 32a and 32b facing each other in the longitudinal direction and side portions 32c and 32d facing each other in the short direction, and the side portions 32a, 32b, Notches 32a-1, 32b-1, and 32d-1 are formed at the respective edges of 32d, and locking pieces 32A are formed at both corners of the side portions 32a and 32b. The light diffusion plate 32 is used for diffusing the light from the LED 24 and irradiating the liquid crystal panel 10 uniformly in the surface.

  The reflection plate 33 has a quadrangular shape, and a window portion 34 formed of a notch portion is formed on one side thereof. The reflector 33 is used to reflect light from the LED 24 and effectively use the light.

  The prism sheet 35 is a quadrangular shape having side portions 35a and 35b that face each other in the longitudinal direction and side portions 35c and 35d that face each other in the short direction, and the side portions 35a, 35b, and 35d. Notches 35a-1, 35b-1, and 35d-1 are formed at the respective edge portions of the prism sheet 35. A prism forming surface, which is one surface portion of the prism sheet 35, is provided with, for example, a prism (see FIG. (Not shown). Further, locking piece portions 35A are formed at both corner portions of the side portions 35a and 35b.

  The prism sheet 36 has a quadrangular shape having side portions 36a and 36b facing each other in the longitudinal direction and side portions 36c and 36d facing each other in the short direction, and the side portions 36a and 36b. 36d, notches 36a-1, 36b-1, and 36d-1 are formed at the respective edges, and the prism forming surface, which is one surface portion of the prism sheet 36, extends along the short direction, for example. A prism (not shown) is formed. A locking piece 36A is formed at both corners of the side portions 36a and 36b.

  Further, the sheet with adhesive 50 has a frame shape having side portions 50a and 50b facing each other in the longitudinal direction and side portions 50c and 50d facing each other in the short direction, and the side portions The openings 51 are formed by 50a, 50b, 50c and 50d, and the side part 50c is wider than the other side parts 50a, 50b and 50d. Further, a front side adhesive layer 52 is formed on the surface of the side portions 50a, 50b, 50c and 50d, and a back side adhesive layer 53 is formed on the back side.

  Further, as shown in FIG. 3, the frame body 40 has a rectangular frame shape having side portions 40a and 40b facing each other in the longitudinal direction and side portions 40c and 40d facing each other in the short direction. In addition, the opening 41 is formed by the side portions 40a, 40b, 40c, and 40d. The side portions 40a, 40b, 40c, and 40d have an L-shaped cross-section in which the standing wall portion 43 is raised on the bottom surface portion 42, and the side wall portion 40c lacks the standing wall portion 43 except for both sides thereof. Further, a locking groove 44 is formed in the standing wall 43 of the side portions 40a and 40b, and a notch 45 is formed in the standing wall 43 of the side 40d.

  An LED holder portion 46 is formed on the side portion 40c from which the standing wall portion 43 is removed, and an LED storage portion 47 formed of a rectangular notch portion is formed on the inner edge portion 46a of the LED holder portion 46. The LED housing portion 47 has an opening 47 a opened to the opening 41.

  4 and 5, the light guide plate 31 is disposed with the light emitting surface 31b as the front side, and the light incident surface 31a of the light guide plate 31 is the LED housing portion 47 as shown in FIGS. This is opposed to the opening 47a. In this case, the back surface of the light guide plate 31 (the side opposite to the light emitting surface 31 b) is positioned in the opening 41 of the frame body 40. A reflective plate 33 is adhered to the back surface of the light guide plate 31, and the peripheral portion of the reflective plate 33 is adhered to the bottom surface portion 43 (see FIG. 3) of the frame body 40 and the LED holder portion 46 from the back. In addition, an LED storage portion 47 is positioned in the window portion 34 of the reflection plate 33.

A light diffusing plate 32 and two layers of prism sheets 35, 3 are provided on the light exit surface 31 b of the light guide plate 31.
6 are arranged in this order.

That is, as shown in FIGS. 2 and 3, the prism sheets 35, 36 overlap so that the plane of the prism sheet 36, that is, the surface on which the prism is not formed overlaps the prism forming surface of the prism sheet 35. The notches (35a-1, 35b-1, 35d-1) (36a-1, 36b-1, 37d-1) of the prism sheets 35, 36 and the notches (32a-1, 32b-1, 32d-1), and the prism sheet 35, 36 and the light diffusing plate 32 are light emitting surfaces of the light guide plate 31 in a state where the locking pieces 35A, 36A, 32A are overlapped. The locking pieces 35 </ b> A, 36 </ b> A, and 32 </ b> A are inserted into the locking grooves 44 of the frame body 40, located on 31 b. In this embodiment, a light diffusing sheet is disposed on the light guide member 31, two prism sheets are stacked on the light diffusing sheet, and a light shielding sheet is disposed so as to overlap a part of the prism sheet.
In this embodiment, a light shielding sheet is used to prevent light leakage around the light guide plate, but between the diffusion sheet or prism sheet and the light guide plate, between the diffusion sheet and the prism sheet, or between the prism sheet and the prism sheet. Then, a frame-like spacer sheet (adhesive is provided on the lower surface as in the case of the light shielding film) used to prevent the occurrence of a Newton ring (light interference pattern) is formed on the light guide member and the frame body. The same effect as in the above embodiment can be obtained even if the LED, which is a light source disposed in a notch portion of the frame body, is bonded to the spacer sheet.

As shown in FIGS. 3 and 5, the adhesive sheet 50 is stacked on the prism sheet 36, and an adhesive layer 53 is provided on the back side of the side portion 50 c of the adhesive sheet 50. Are bonded to the LED holder portion 46 of the frame body 40, the adhesive portion 31c of the light guide plate 31, and the one side portion 32c of the light diffusion plate 32, and the back sides of the side portions 50a, 50b, 50d of the sheet 50 with adhesive. The adhesive layer 53 is adhered to the other three side portions 32a, 32b, and 32d of the light diffusing plate 32, and the adhesive layer 53 on the back side is notched portions of the light diffusing plate 32 and the prism sheets 35 and 36 ( 32 a-1, 32 b-1, 32 d-1) (35 a-1, 35 b-1, 35 d-1) (36 a-1, 36 b-1, 37 d-1) Bonded.
Here, in this embodiment, as described above, the adhesive layer of the adhesive-attached sheet 50 is adhered to the frame body 40, the light guide plate 31, the light diffusion plate 32, the light source LED 24, and the prism sheet 36. The LED is supported, but the present invention is The adhesive layer 53 on the back side of the pressure-sensitive adhesive sheet 50 may be adhered only to the frame body 40 and the LED 24. b. Further, the adhesive layer 53 on the back side of the adhesive-attached sheet 50 may be adhered only to the light guide plate 31 and the LED 24. c. Further, the adhesive layer 53 on the back side of the adhesive-attached sheet 50 may be adhered only to the one side 32c of the light diffusion plate 32 and the LED 24. Further, the adhesive layer 53 on the back side of the sheet 50 with the pressure-sensitive adhesive may be adhered only to the prism sheet and the LED 24, or a combination of these a, b, c, and d may be performed. By bonding, the LED is supported, and peeling from the LED connection substrate due to impact or the like can be prevented, and an effect of improving reliability can be obtained.
Further, the combination of the two prism sheets on the light guide plate and the diffusion sheet is not limited to this embodiment, and the effect of the present invention is the same even if the number of sheets combined and the stacking order of the sheets are determined by experiment. can get.

  In this case, since the side part 50c of the adhesive-attached sheet 50 is bonded to the LED holder part 46 of the frame 40, the side part 50c covers the LED storage part 47, and this LED storage part The back side adhesive layer 53 is located at a portion of the portion 43 that hits the ceiling.

  The frame 40 accommodates the liquid crystal panel 10 so as to overlap the light diffusing plate 32, and the second polarizing plate 19 of the liquid crystal panel 10 includes the side portions 50 a, 50 b, 50 c, 50 d of the adhesive-attached sheet 50. The front side adhesive layer 52 is adhered.

  The LED mounting portion 23 of the flexible wiring board 20 is disposed to face the LED holder portion 46 of the frame body 40 by bending the drawer piece portion 22 toward the lighting device 30, and the LED 24 mounted on the LED mounting portion 23 is mounted on the LED mounting portion 23. The LED 24 is housed in the LED housing 47, and the end surface 24 a of the LED 24 is bonded to the back side adhesive layer 53 facing the LED housing 47.

  As described above, according to the embodiment of the present invention, the frame body 40 is provided with the LED storage portion 47 having the opening 47 a facing the light incident side surface 31 a of the light guide plate 31, and the LED storage portion 47 has an adhesive. The flexible printed circuit board 20 is connected to the terminal portion of the liquid crystal panel 10 so that the back side adhesive layer 53 of the attached sheet 50 faces, and is bent on the flexible wiring substrate 20 to the lighting device 30 side so as to face the LED housing portion 47. The LED mounting portion 23 is continuously provided, the LED 24 is mounted on the LED mounting portion 23, the LED 24 is stored in the LED storage portion 47, and the LED 24 is bonded to the back side adhesive layer 53 of the adhesive-attached sheet 50. Thus, the LED 24 is fixed.

  In this way, the back side adhesive layer 53 of the adhesive-attached sheet 50 attached to the frame body 40 by adhering the light guide plate 31 faces the LED storage portion 47, and the LED 24 mounted on the LED mounting portion 23 of the flexible wiring board 20 is mounted. Since the LED 24 can be fixed by adhering the LED 24 to the back side adhesive layer 53 when accommodated in the LED accommodating portion 27, the LED 24 can be fixed to the light incident surface 31 a of the light guide plate 31 without complicated work. On the other hand, it can be arranged at the optimum position, and it is possible to prevent the optimum position from easily deviating without occurrence of peeling due to an external impact or the like. In addition, a new means for fixing the LED 24 is not required, and the work is facilitated, and the cost can be reduced.

  Further, according to the embodiment of the present invention, in addition to fixing the LED 24 by adhering the LED 24 to the back side adhesive layer 53 when the LED 24 is accommodated in the LED accommodating portion 47, as shown in FIG. In addition, by fixing the both end portions 23a and 23b and the intermediate portion 23c of the LED mounting portion 23 to the LED holder portion 46 of the frame body 40, the fixing of the LED 24 can be further strengthened.

  As described above, according to the present invention, as shown in FIGS. 3 and 5, the LED (light emitting diode) is housed in a part of the frame body 40 having the first opening 41 in which the light guide member 31 is disposed. The light guide member 31 of the lighting device in which the light guide member 31 and the LED (light emitting diode) 24 are disposed adjacent to each other in a planar manner in the frame body 40 provided with two openings 47a. In the display device in which the display panel 10 is disposed on the surface 31B side, a plate-like member 50 having an adhesive layer on the surface on the light guide member 31 side is disposed so as to straddle the frame body 40 and the LED 24. The frame 40 is used to support the LED (24).

  In addition, in the present invention, the second opening 47a that houses the LED (light emitting diode) 24 that is a light source in a part of the frame 40 having the first opening 41 in which the light guide member 31 is disposed. Is a lighting device in which the light guide member 31 and the LED (light emitting diode) 24 are disposed adjacent to each other in a plane, and is bonded to at least the surface on the light guide member 31 side. The lighting device is characterized in that a plate-like member 50 having a layer 53 is disposed so as to straddle the frame body 40 and the LED 24, and the LED 24 is supported using the frame body 40.

  In the above-described flexible wiring board 20 according to the embodiment of the present invention, as shown in FIG. 7, the lead-out piece 22 and the LED mounting part 23 of the flexible wiring board 20 are substantially T-shaped. As shown in FIG. 8, it is possible to make this drawer piece part 22 and LED mounting part 23 into a substantially L shape. In this case, as shown in FIG. 9, the tip end portion 23 a of the LED mounting portion 23 is bonded to the LED holder portion 46 of the frame body 40.

  When the drawing piece portion 22 and the LED mounting portion 23 are processed from the flexible wiring board 20, as shown in FIG. 7, the drawing piece portion 22 and the LED mounting portion 23 are substantially T-shaped, that is, a hammer head shape. The portions A and B located on both sides of the drawer piece portion 22 of the flexible wiring board 20 were discarded portions. As shown in FIG. 8, the drawer piece portion 22 and the LED mounting portion 23 are substantially L-shaped. By doing, the site | part A becomes a discard part and cost reduction can be aimed at.

  In the liquid crystal display panel, two transparent substrates made of glass or the like are bonded together with a sealing material, and liquid crystal is sealed between the transparent substrates and inside the sealing material. A polarizing plate is stuck on the outer surface of the transparent substrate. A semiconductor chip constituting a liquid crystal driving circuit is mounted on the end of the transparent substrate.

A flexible wiring board 20 is connected to the liquid crystal display panel 10, and a wiring pattern not shown in FIG. 1 is formed on the flexible wiring board 20. As shown in FIG. An input terminal portion 21b that is conductively connected to the portion is directly connected to an external circuit board (which means outside for a display panel or a liquid crystal panel) (not shown) installed inside an electronic device or the like, or externally It is electrically connected to a connector or the like mounted on the circuit board.
An LED (light emitting diode) 24 that is a light source that emits light to the light guide plate 30 and an IC 25 that is an integrated circuit for driving the LED are mounted on the flexible wiring board 20.

Thus, the flexible wiring board 20 is electrically connected to the external circuit board (not shown).
Further, the flexible wiring board 20 includes a second substrate portion (drawer piece portion) extending in an L shape from one side of a long side of a rectangular first substrate portion (rectangular substrate portion on which the IC 25 is mounted). 22), the tip of the second substrate portion on the opposite side of the first substrate portion has a substantially T shape, and the tip portion of the substantially T shape (LED mounting portion 23. FIG. 1). In FIG. 7, the LED 24, which is a light source, is mounted in the vicinity of the hammer head portion 23).

    Further, the flexible wiring board 20 includes a second substrate portion (drawer piece portion) extending in an L shape from one side of a long side of a rectangular first substrate portion (rectangular substrate portion on which the IC 25 is mounted). 8), and the tip of the second substrate portion on the side opposite to the first substrate portion has a further substantially L-shaped shape as shown in FIG. 8, and the substantially L-shaped tip portion. The LED 24 as a light source is mounted in the vicinity (LED mounting portion 23).

The lighting device 30 described above is a lighting device in the display device according to the present invention, but the lighting device can be used in addition to the display device. In this case, the lighting device does not necessarily require the light diffusing plate 32 and the prism sheets 35 and 36. This illumination device is shown in FIGS.
FIG. 10 is a perspective view of an exploded state of the lighting device according to the present invention, and FIG. 11 is a cross-sectional view in which the lighting device is partially omitted.

  That is, the light guide plate 31 is inserted into the frame body 40 with the light emission surface 31 b being the front side, and the light incident surface 31 a of the light guide plate 31 is opposed to the opening 47 a of the LED housing portion 47. In this case, the back surface of the light guide plate 31 (the side opposite to the light emitting surface 31 b) is positioned in the opening 41 of the frame body 40. A reflective plate 33 is adhered to the back surface of the light guide plate 31, and a peripheral portion of the reflective plate 33 is adhered to the bottom surface portion 42 and the LED holder portion 46 of the frame body 40 from the back. An LED storage portion 47 is located in the window portion 34.

And the sheet | seat 50 with an adhesive is piled up on the light-guide plate 31, and the back side contact bonding layer 53 of the side part 50c of the sheet | seat 50 with an adhesive is the LED holder part 46 of the frame 40, and the adhesion part of the light-guide plate 31. It is adhered to 31c, and the side portions 50a, 50b, 50d of the sheet with adhesive 50
The back side adhesive layer 53 is adhered to the other three sides of the light guide plate 31, and the back side adhesive layer 53 is adhered to the bottom surface part 42 of the frame body 40.

  In this case, since the side part 50c of the adhesive-attached sheet 50 is bonded to the LED holder part 46 of the frame 40, the side part 50c covers the LED storage part 47, and this LED storage part The back side adhesive layer 53 is located at a portion of the portion 47 that hits the ceiling. The LED 24 is accommodated in the LED accommodating portion 47, and the end surface portion 24 a of the LED 24 is bonded to the back side adhesive layer 53 facing the LED accommodating portion 47.

According to the embodiment of the lighting device of the present invention described above, the LED 24 is fixed by using the back side adhesive layer 53 of the adhesive-attached sheet 50 attached to the frame body 40 by adhering the light guide plate 31. Can be arranged at an optimum position with respect to the light incident surface 31c of the light guide plate 31 without complicated work, and the optimum position is not easily deviated from the occurrence of peeling due to an external impact or the like. can do. In addition, a new means for fixing the LED 24 is not required, and the work is facilitated, resulting in cost reduction.

  According to the display device according to the present invention, since the light source (for example, LED) is fixed using the adhesive layer of the adhesive-attached sheet that is attached by attaching the light guide plate to the frame, the LED is complicated. Therefore, it is possible to arrange the light guide plate at an optimum position with respect to the light incident surface of the light guide plate, and it is possible to prevent the optimum position from easily deviating without the occurrence of peeling due to an external impact or the like. In addition, it does not require a new light source (for example, LED) fixing means, and the work is facilitated and the cost can be reduced, which is useful for a display device such as a liquid crystal display device.

It is a perspective view which shows the outline of the display apparatus which concerns on this invention. It is a top view of the illuminating device in the display apparatus. It is a perspective view of the decomposition | disassembly state of the same illuminating device. It is explanatory drawing of the opening of the LED accommodating part of a frame. It is sectional drawing which a part of display device concerning the present invention was omitted. It is explanatory drawing of the state which accommodated LED in the LED accommodating part of the frame. When processing a drawing piece part and an LED mounting part from a flexible wiring board, it is explanatory drawing of the discard part of a flexible wiring board in case a drawing piece part and an LED mounting part are substantially T-shaped. It is explanatory drawing of the discard part of a flexible wiring board in case a drawer piece part and an LED mounting part are substantially L-shaped when processing a drawing piece part and an LED mounting part from a flexible wiring board. It is explanatory drawing of the state which accommodated LED in the LED accommodating part of the frame in case a drawer piece part and an LED mounting part are substantially L-shaped. It is a perspective view of the decomposition | disassembly state of the illuminating device which concerns on this invention. It is sectional drawing which abbreviate | omitted a part of the illumination device. It is sectional drawing of the conventional display apparatus. It is explanatory drawing of the flexible wiring board of the display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid crystal panel 20 Flexible wiring board 30 Illumination device 22 Drawer piece part 23 LED mounting part (hammer head part)
24 LED (light source)
30 Illumination device 31 Light guide plate 31a Light incident surface 31b Light output surface 31c Adhesion part 32 Light diffusion plate 33 Reflection plate 35, 36 Prism sheet 40 Frame body 46 LED holder part 47 LED storage part 47a Opening 50 Light shielding member (sheet with adhesive) )
52 Front side adhesive layer 53 Back side adhesive layer 100 Liquid crystal display device

Claims (12)

The light guide member of a lighting device having a light guide plate member having a light incident surface and a light output surface in a direction intersecting each other and an LED (light emitting diode) disposed on the light incident surface side of the light guide member. In a display device having a display panel on the surface side,
A plate-like member is disposed in the vicinity of the light exit surface of the light guide member, an adhesive is provided on a surface of the plate member on the light guide member side, and the light guide member is provided on the adhesive of the plate member. A display device, wherein the LED is bonded. The light guide member and the LED are provided in the frame body provided with a second opening portion for housing an LED (light emitting diode) in a part of the frame body having the first opening portion in which the light guide member is disposed. In a display device in which a display panel is disposed on the exit surface side of the light guide member of a lighting device disposed adjacent to each other in a plane,
A display device, wherein a plate-like member having an adhesive layer on the light guide member side is disposed so as to straddle the frame and the LED, and the LED is supported using the frame.   The display device according to claim 1, wherein the plate member is a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet.   The flexible wiring board which mounts the said LED is arrange | positioned by the surface of the said LED on the opposite side to the surface of the said LED adhere | attached on the said plate-shaped member, The Claim 1 or 2 or 3 characterized by the above-mentioned. The display device described.     The display device according to claim 4, wherein the flexible wiring board on which the LED is mounted is also electrically connected to the display panel.     The display device according to claim 5, wherein the flexible wiring board is electrically connected to an external circuit board.     The flexible wiring board has a second board part extending in an L shape from one side of the long side of the first board part having a rectangular shape, and the second board part opposite to the first board part. The display device according to claim 6, wherein a tip of the substrate portion has a substantially T shape, and the LED is mounted in the vicinity of the tip portion of the substantially T shape.     The flexible wiring board has a second board part extending in an L shape from one side of the long side of the first board part having a rectangular shape, and the second board part opposite to the first board part. The display device according to claim 6, wherein the tip of the substrate portion further has a substantially L-shape, and the LED is mounted in the vicinity of the tip portion of the substantially L-shape.   The display device according to claim 1, wherein the display panel is a liquid crystal display panel that is a display panel using liquid crystal. In a lighting device having a light guide plate member having a light incident surface and a light output surface in directions intersecting each other and an LED (light emitting diode) disposed on the incident surface side of the light guide member,
A plate-like member having an adhesive layer on the surface of the light guide member and having an extending portion extending to the light source side is disposed close to the emission surface of the light guide member, and the plate-like member The lighting device, wherein the light guide member and the LED are bonded to the adhesive. The light guide member and the LED are provided in the frame body provided with a second opening portion for housing an LED (light emitting diode) in a part of the frame body having the first opening portion in which the light guide member is disposed. In a lighting device arranged adjacent to each other in a plane,
A lighting device characterized in that a plate-like member having an adhesive layer on at least the surface of the light guide member is disposed so as to straddle the frame and the LED, and the LED is supported using the frame. . The lighting device according to claim 10, wherein the plate-like member is a light shielding sheet, a spacer sheet, a diffusion sheet, or a prism sheet.

Images