JP2011034692A - Backlight device and liquid crystal display device - Google Patents

Backlight device and liquid crystal display device Download PDF

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JP2011034692A
JP2011034692A JP2009177148A JP2009177148A JP2011034692A JP 2011034692 A JP2011034692 A JP 2011034692A JP 2009177148 A JP2009177148 A JP 2009177148A JP 2009177148 A JP2009177148 A JP 2009177148A JP 2011034692 A JP2011034692 A JP 2011034692A
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guide plate
light guide
fpc board
light source
light
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JP5387210B2 (en
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Atsushi Hiranobu
淳 平信
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Casio Computer Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To uniformize luminance of a liquid crystal display device, by preventing relative position deviation between a light guide plate and an LED element caused by vibration or the like. <P>SOLUTION: The backlight device includes the light guide plate; a plurality of light sources arranged on one side part of the light guide plate; an FPC substrate for mounting the plurality of light sources; and a frame for housing the light guide plate, the plurality of light sources and the FPC substrate. A plurality of recessed parts for housing the plurality of light sources at least one by one, and a plurality of projected parts, arranged separately between the plurality of recessed parts are arranged on one side part of the light guide plate. The FPC substrate includes a body along the one side surface of the light guide plate, a plurality of light source mounting parts for mounting the plurality of light sources separately, and a plurality of connection parts for separately connecting the plurality of light source mounting parts to the body. When the light guide plate, the plurality of light sources and the FPC substrate are housed in the frame, the connection parts of the FPC substrate are deformed elastically, to urge the light source toward the recessed part of the light guide plate by elastic restoring force; and the body of the FPC substrate is sandwiched by the projected part of the light guide plate and the frame. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、バックライト装置及び液晶表示装置に関する。   The present invention relates to a backlight device and a liquid crystal display device.

従来、液晶表示装置に搭載されるバックライト装置においては、光拡散板の下に光源を設けた直下型と、導光板の側面に光源を設けたサイドライト型等が知られている。サイドライト型のバックライト装置では、例えばＬＥＤ等の光源が複数設置されるが、これらＬＥＤと導光板との位置関係にバラツキがあると液晶表示装置自体の輝度が均一にならない問題があった。
これを解消すべく、近年においては、ＬＥＤが実装されるＦＰＣ基板を、バックライト装置の組み立て後においても弾性変形したままの状態とすることにより、その弾性復元力でＬＥＤを導光板に向けて付勢して、ＬＥＤと導光板との位置関係を一定にする技術が開発されている（例えば特許文献１参照）。具体的に説明するとＦＰＣ基板には、ＬＥＤを実装したＬＥＤ配設部と、ＬＥＤ配設部を導光板に向けて押しつけることでＬＥＤを導光板に向けて付勢する屈曲部とが、各ＬＥＤに対応して複数組設けられている。各組の屈曲部は、ＦＰＣ基板の幹線部からそれぞれ個別に延在している。 Conventionally, as backlight devices mounted on a liquid crystal display device, there are known a direct type in which a light source is provided under a light diffusion plate, a side light type in which a light source is provided on a side surface of a light guide plate, and the like. In the sidelight type backlight device, for example, a plurality of light sources such as LEDs are installed. However, there is a problem that the luminance of the liquid crystal display device itself is not uniform if there is variation in the positional relationship between the LEDs and the light guide plate.
In order to solve this problem, in recent years, the FPC board on which the LED is mounted remains elastically deformed even after the backlight device is assembled, so that the LED is directed toward the light guide plate with its elastic restoring force. A technique for energizing and making the positional relationship between the LED and the light guide plate constant has been developed (see, for example, Patent Document 1). Specifically, the FPC board includes an LED mounting portion on which the LED is mounted, and a bent portion that urges the LED toward the light guide plate by pressing the LED mounting portion toward the light guide plate. A plurality of sets are provided correspondingly. Each set of bent portions individually extends from the main line portion of the FPC board.

特開２００７−２８０６８３号公報JP 2007-280683 A

しかしながら、特許文献１に記載のバックライト装置では、幹線部が筐体に接着剤等によって固定されているものの、ＬＥＤと導光板とは屈曲部の弾性復元力のみでその位置関係が規定されている。このため、組み立て後に振動等が発生し、屈曲部にも振動が伝わってしまうと、ＬＥＤと導光板とに相対的な位置ズレが生じてしまい、結果液晶表示装置自体の輝度が不均一になってしまうおそれがあった。
本発明の課題は、振動等による導光板とＬＥＤ素子との相対的な位置ズレを防止して、液晶表示装置の輝度の均一化を図ることである。 However, in the backlight device described in Patent Document 1, although the trunk portion is fixed to the housing with an adhesive or the like, the positional relationship between the LED and the light guide plate is defined only by the elastic restoring force of the bent portion. Yes. For this reason, if vibration or the like is generated after assembly and the vibration is transmitted to the bent portion, a relative positional shift occurs between the LED and the light guide plate, and as a result, the luminance of the liquid crystal display device itself becomes non-uniform. There was a risk of it.
An object of the present invention is to prevent relative positional deviation between the light guide plate and the LED element due to vibration or the like, and to make the luminance of the liquid crystal display device uniform.

以上の課題を解決するため、本発明の一の態様によれば、
一側部に複数の凸部が設けられた導光板と、
隣接する前記導光板の凸部間領域に配置された光源と、
前記光源が実装されたＦＰＣ基板と、
前記導光板、前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
前記光源が実装される光源実装部と、
前記光源実装部と前記本体部とを連結する連結部と、を有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凸部と前記フレームとにより挟持されるように、前記導光板、前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とするバックライト装置が提供される。 In order to solve the above problems, according to one aspect of the present invention,
A light guide plate provided with a plurality of convex portions on one side,
A light source disposed in a region between adjacent convex portions of the light guide plate;
An FPC board on which the light source is mounted;
A frame that houses the light guide plate, the light source, and the FPC board;
The FPC board is
A main body along one side of the light guide plate;
A light source mounting portion on which the light source is mounted;
A connecting part that connects the light source mounting part and the main body part;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is the convex portion of the light guide plate. A backlight device is provided in which the light guide plate, the light source, and the FPC board are accommodated in the frame so as to be sandwiched between the frame and the frame.

上記バックライト装置において、好ましくは、隣接する前記導光板の凸部間領域を複数有し、複数の前記隣接する前記導光板の凸部間領域には複数の前記光源が少なくとも１つずつ収容される。
上記バックライト装置において、好ましくは、前記ＦＰＣ基板における前記本体部は、複数の接続部と、前記複数の接続部間をつなぎ、前記光源実装部と前記本体部とを連結する前記連結部が配置される所定領域、を備え、前記ＦＰＣ基板における前記本体部のうちの前記接続部が、前記導光板の凸部と前記フレームとの間に介在し、挟持されている。
上記バックライト装置において、好ましくは、前記ＦＰＣ基板の前記接続部と前記導光板の凸部とは接着層によって固定されている。 Preferably, the backlight device includes a plurality of regions between the convex portions of the adjacent light guide plates, and at least one of the plurality of light sources is accommodated in each of the regions between the convex portions of the plurality of adjacent light guide plates. The
In the backlight device, preferably, the main body portion of the FPC board includes a plurality of connection portions and the connection portion that connects the plurality of connection portions and connects the light source mounting portion and the main body portion. The connection portion of the main body portion of the FPC board is interposed between the convex portion of the light guide plate and the frame, and is sandwiched.
In the backlight device, preferably, the connection portion of the FPC board and the convex portion of the light guide plate are fixed by an adhesive layer.

また、本発明の他の態様によれば、
一側部に複数の凹部が設けられた導光板と、
隣接する前記凹部に少なくとも１つずつ配置された複数の光源と、
複数の前記光源が実装されたＦＰＣ基板と、
前記導光板、複数の前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
複数の前記光源が実装される複数の光源実装部と、
複数の前記光源実装部と前記本体部とを連結する複数の連結部とを有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凹部間領域と前記フレームとにより挟持されるように、前記導光板、複数の前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とするバックライト装置が提供される。 According to another aspect of the invention,
A light guide plate provided with a plurality of recesses on one side,
A plurality of light sources arranged at least one by one in the adjacent recesses;
An FPC board on which a plurality of the light sources are mounted;
A frame that houses the light guide plate, the plurality of light sources, and the FPC board,
The FPC board is
A main body along one side of the light guide plate;
A plurality of light source mounting portions on which a plurality of the light sources are mounted;
A plurality of light source mounting portions and a plurality of connecting portions that connect the main body portion;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is between the recesses of the light guide plate. A backlight device is provided in which the light guide plate, the plurality of light sources, and the FPC board are accommodated in the frame so as to be sandwiched between a region and the frame.

また、本発明の他の態様によれば、
バックライト装置と、
前記バックライト装置の観察面側に配置された液晶表示パネルと、を有する液晶表示装置において、
前記バックライト装置は、
一側部に複数の凸部が設けられた導光板と、隣接する前記導光板の凸部間領域に配置された光源と、
前記光源が実装されたＦＰＣ基板と、
前記導光板、前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
前記光源が実装される光源実装部と、
前記光源実装部と前記本体部とを連結する連結部と、を有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凸部と前記フレームとにより挟持されるように、前記導光板、前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とする液晶表示装置が提供される。 According to another aspect of the invention,
A backlight device;
In a liquid crystal display device having a liquid crystal display panel disposed on the observation surface side of the backlight device,
The backlight device includes:
A light guide plate provided with a plurality of convex portions on one side, a light source disposed in a region between the convex portions of the adjacent light guide plates, and
An FPC board on which the light source is mounted;
A frame that houses the light guide plate, the light source, and the FPC board;
The FPC board is
A main body along one side of the light guide plate;
A light source mounting portion on which the light source is mounted;
A connecting portion that connects the light source mounting portion and the main body portion;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is the convex portion of the light guide plate. And the frame so that the light guide plate, the light source and the FPC board are accommodated in the frame.

上記液晶表示装置において、好ましくは、前記ＦＰＣ基板における前記本体部は、前記光源実装部及び前記連結部が配置される複数の他凹部と、前記複数の他凹部の間に配置される複数の接続部と、を備え、
前記ＦＰＣ基板における前記本体部のうちの前記接続部が、前記導光板の凸部と前記フレームとの間に介在し、挟持されている
上記液晶表示装置において、好ましくは、前記ＦＰＣ基板の前記本体部と前記導光板の凸部とは接着層によって固定されている。 In the liquid crystal display device, preferably, the main body portion of the FPC board includes a plurality of other concave portions in which the light source mounting portion and the connecting portion are disposed, and a plurality of connections disposed between the plurality of other concave portions. And comprising
In the liquid crystal display device, preferably, the main body of the FPC board, wherein the connecting portion of the main body portion of the FPC board is interposed and sandwiched between a convex portion of the light guide plate and the frame. The portion and the convex portion of the light guide plate are fixed by an adhesive layer.

本発明によれば、振動等による導光板とＬＥＤ素子との相対的な位置ズレを防止して、液晶表示装置の輝度の均一化を図ることができる。   According to the present invention, it is possible to prevent relative positional deviation between the light guide plate and the LED element due to vibration or the like, and to make the luminance of the liquid crystal display device uniform.

本実施形態の液晶表示装置の要部構成を示す正面図である。It is a front view which shows the principal part structure of the liquid crystal display device of this embodiment. 図１のII−II切断線に沿った断面図である。It is sectional drawing along the II-II cutting line of FIG. 図１のIII−III切断線に沿った断面図である。It is sectional drawing along the III-III cutting line of FIG. 図１の液晶表示装置に備わる導光板の概略構成を示す正面図である。It is a front view which shows schematic structure of the light-guide plate with which the liquid crystal display device of FIG. 1 is equipped. 図１の液晶表示装置に備わるＦＰＣ基板の概略構成を示す正面図である。FIG. 2 is a front view illustrating a schematic configuration of an FPC board provided in the liquid crystal display device of FIG. 1. 図５のＦＰＣ基板の変形例を示す正面図である。It is a front view which shows the modification of the FPC board of FIG. 図５のＦＰＣ基板を適用した場合の図１のIII−III切断線に沿った変形例を示す断面図である。It is sectional drawing which shows the modification along the III-III cutting line of FIG. 1 at the time of applying the FPC board | substrate of FIG.

以下に、本発明を実施するための最良の形態について図面を用いて説明する。ただし、以下に述べる実施形態には、本発明を実施するために技術的に好ましい種々の限定が付されているが、発明の範囲を以下の実施形態及び図示例に限定するものではない。   The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for carrying out the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

図１は本実施形態の液晶表示装置の要部構成を示す正面図である。図２は図１のII−II切断線に沿った断面図である。図３は図１のIII−III切断線に沿った断面図である。この図１〜図３に示すように、液晶表示装置１は、液晶表示パネル１０と、液晶表示パネル１０に光を照射するバックライト装置２０とを備える。   FIG. 1 is a front view showing a main configuration of the liquid crystal display device of the present embodiment. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. As shown in FIGS. 1 to 3, the liquid crystal display device 1 includes a liquid crystal display panel 10 and a backlight device 20 that irradiates the liquid crystal display panel 10 with light.

液晶表示パネル１０は、種々の回路部品が搭載される第一基板１１と、ガラス基板である第二基板１２とを有し、これら基板１１，１２間に樹脂層（図示省略）を封止することにより形成されている。   The liquid crystal display panel 10 includes a first substrate 11 on which various circuit components are mounted and a second substrate 12 that is a glass substrate, and a resin layer (not shown) is sealed between the substrates 11 and 12. It is formed by.

バックライト装置２０は、導光板２１と、導光板２１の一側部に配設される複数の光源２２と、複数の光源２２を実装するＦＰＣ基板２３と、導光板２１、複数の光源２２及びＦＰＣ基板２３を収容するフレーム２４と、を備えている。   The backlight device 20 includes a light guide plate 21, a plurality of light sources 22 disposed on one side of the light guide plate 21, an FPC board 23 on which the plurality of light sources 22 are mounted, a light guide plate 21, a plurality of light sources 22, and And a frame 24 that accommodates the FPC board 23.

図４は導光板２１の概略構成を示す正面図である。この図４に示すように、導光板２１の一側部２１１には、複数の光源２２が１つずつ収容される正面視矩形状の複数の凹部２１２と、複数の凹部２１２の間に個別に配置された正面視矩形状の複数の凸部２１３とが設けられている。すなわち、凸部２１３により挟まれた凹部２１２は凸部間領域であり、凹部２１２により挟まれた凸部２１３は凹部間領域である。そして、凸部２１３は、凹部２１２における導光板２１の一側面に沿う内側面２１２ａよりも突出している。   FIG. 4 is a front view showing a schematic configuration of the light guide plate 21. As shown in FIG. 4, the one side portion 211 of the light guide plate 21 is individually provided between the plurality of concave portions 212 having a rectangular shape in front view and accommodating the plurality of light sources 22 one by one. A plurality of convex portions 213 having a rectangular shape in front view are provided. That is, the concave portion 212 sandwiched between the convex portions 213 is a region between the convex portions, and the convex portion 213 sandwiched between the concave portions 212 is a region between the concave portions. And the convex part 213 protrudes rather than the inner surface 212a along the one side surface of the light-guide plate 21 in the recessed part 212. FIG.

図５はＦＰＣ基板２３の概略構成を示す正面図である。この図５に示すように、ＦＰＣ基板２３には、導光板２１の一側部に沿う本体部２３１と、複数の光源２２が個別に実装される複数の光源実装部２３２と、複数の光源実装部２３２と本体部２３１とを個別に連結する複数の連結部２３４と、本体部２３１から外部に引き出されて外部端子と接続される接続部２３５と、が設けられている。   FIG. 5 is a front view showing a schematic configuration of the FPC board 23. As shown in FIG. 5, the FPC board 23 has a main body 231 along one side of the light guide plate 21, a plurality of light source mounting portions 232 on which a plurality of light sources 22 are individually mounted, and a plurality of light source mountings. A plurality of connecting portions 234 for individually connecting the portion 232 and the main body portion 231, and a connecting portion 235 that is pulled out from the main body portion 231 and connected to an external terminal are provided.

本体部２３１における導光板２１側には、光源実装部２３２及び連結部２３４が配置される第一凹部（他凹部）２３６が、導光板２１の凹部２１２に対応するように形成されている。本体部２３１における導光板２１側の第一凹部２３６の間は、導光板２１の凸部２１３に接合される接合部２３７となる。一方、本体部２３１における導光板２１側とは反対側には、第二凹部２３８が複数、それぞれ接合部２３７に対応するように形成されている。これにより、本体部２３１は全体として蛇行するように形成されている。
光源実装部２３２には、その先端部から所定の間隔を空けて内側に光源２２が実装されている（図２参照）。光源実装部２３２における光源２２からはみ出た先端部を光源実装部側先端部２３２ａと称す。 On the light guide plate 21 side of the main body 231, a first recess (another recess) 236 in which the light source mounting portion 232 and the connecting portion 234 are disposed is formed so as to correspond to the recess 212 of the light guide plate 21. A space between the first concave portions 236 on the light guide plate 21 side in the main body portion 231 serves as a joint portion 237 joined to the convex portion 213 of the light guide plate 21. On the other hand, a plurality of second concave portions 238 are formed on the side opposite to the light guide plate 21 side in the main body portion 231 so as to correspond to the joint portions 237, respectively. Thereby, the main-body part 231 is formed so that it may meander as a whole.
The light source 22 is mounted inside the light source mounting portion 232 at a predetermined interval from the tip (see FIG. 2). A tip portion of the light source mounting portion 232 that protrudes from the light source 22 is referred to as a light source mounting portion side tip portion 232a.

連結部２３４は、第一凹部２３６の略中央部分から延出していて、その先端部に光源実装部２３２が接続されている。光源実装部２３２は、本体部２３１の接合部２３７から所定の間隔を空けて配置されている。光源実装部２３２に実装される光源２２としては、例えばＬＥＤ等が挙げられる。   The connecting portion 234 extends from a substantially central portion of the first recess 236, and the light source mounting portion 232 is connected to the tip portion thereof. The light source mounting part 232 is arranged at a predetermined interval from the joint part 237 of the main body part 231. Examples of the light source 22 mounted on the light source mounting unit 232 include an LED.

フレーム２４は、図１〜図３に示すように、導光板２１、複数の光源２２及びＦＰＣ基板２３を収容するとともに、液晶表示パネル１０を収容する。フレーム２４の観察側には、液晶表示パネル１０を収容するパネル用凹部２４１が形成されている。また、フレーム２４の観察側とは反対側には、導光板２１を収容する導光板用凹部２４２が形成されている。各凹部２４１，２４２の底面には、光路となる開口２４３が形成されており、この開口２４３によって、光源２２から発せられ導光板２１により拡散された光が液晶表示パネル１０まで到達する。また、フレーム２４には、導光板２１と液晶表示パネル１０との間に介在して、ＦＰＣ基板２３を支持する支持部２４４が形成されている。この支持部２４４は、導光板２１の複数の凸部２１３の全てと対向するように導光板２１の一側部に沿って形成されている。   As shown in FIGS. 1 to 3, the frame 24 houses the light guide plate 21, the plurality of light sources 22, and the FPC board 23, and the liquid crystal display panel 10. On the observation side of the frame 24, a panel recess 241 for accommodating the liquid crystal display panel 10 is formed. A light guide plate recess 242 for accommodating the light guide plate 21 is formed on the opposite side of the frame 24 from the observation side. An opening 243 serving as an optical path is formed on the bottom surface of each of the recesses 241 and 242, and the light emitted from the light source 22 and diffused by the light guide plate 21 reaches the liquid crystal display panel 10 through the opening 243. In addition, a support portion 244 that supports the FPC board 23 is formed on the frame 24 so as to be interposed between the light guide plate 21 and the liquid crystal display panel 10. The support portion 244 is formed along one side portion of the light guide plate 21 so as to face all of the plurality of convex portions 213 of the light guide plate 21.

そして、フレーム２４に導光板２１、複数の光源２２及びＦＰＣ基板２３を収容する際には、導光板２１の各凹部２１２内に１つずつ光源２２が収納されるように、導光板２１とＦＰＣ基板２３とを位置合わせする。このとき、ＦＰＣ基板２３の連結部２３４は図２に示すように弾性変形して屈曲することになる。図２においては、連結部２３４の下方にフレーム２４が配置されているので、連結部２３４はフレーム２４が配置されていない側（図２における上側）に向けて凸となるように屈曲している。弾性変形した連結部２３４の弾性復元力によって、光源実装部２３２上の光源２２が導光板２１の凹部２１２内に付勢されるので、光源２２と導光板２１との位置関係が安定化される。   When the light guide plate 21, the plurality of light sources 22, and the FPC board 23 are accommodated in the frame 24, the light guide plate 21 and the FPC are accommodated so that one light source 22 is accommodated in each recess 212 of the light guide plate 21. The substrate 23 is aligned. At this time, the connecting portion 234 of the FPC board 23 is elastically deformed and bent as shown in FIG. In FIG. 2, since the frame 24 is disposed below the connecting portion 234, the connecting portion 234 is bent so as to protrude toward the side where the frame 24 is not disposed (upper side in FIG. 2). . The light source 22 on the light source mounting portion 232 is urged into the concave portion 212 of the light guide plate 21 by the elastic restoring force of the elastically deformed connecting portion 234, so that the positional relationship between the light source 22 and the light guide plate 21 is stabilized. .

その後、位置合わせ後の導光板２１及びＦＰＣ基板２３がフレーム２４に収容されると、図３に示すように、フレーム２４の支持部２４４と、導光板２１の凸部２１３との間に、ＦＰＣ基板２３の接合部２３７が介在することになる。ここで、フレーム２４と、導光板２１における凸部２１３とが重畳し、ＦＰＣ基板２３の接合部２３７を挟持する重畳領域Ｒ１は、当該接合部２３７全体を挟持できるように接合部２３７の幅Ｈ１よりも大きく設定されている。
また、図２に示すように、フレーム２４における導光板用凹部２４２の内側面２４２ａから、導光板２１における凹部２１２の内側面２１２ａまでの長さＬ１は、屈曲時におけるＦＰＣ基板２３の本体部側基端部２３１ａから光源実装部側先端部２３２ａまでの長さＬ２よりも小さく設定されている。これにより、光源実装部側先端部２３２ａがフレーム２４と導光板２１との重畳領域内に介在することになる。
そして、これらがフレーム２４に固定されれば、ＦＰＣ基板２３の接合部２３７及び光源実装部側先端部２３２ａは、フレーム２４の支持部２４４と、導光板２１の凸部２１３とによって挟持されることになる。
次いで、液晶表示パネル１０をフレーム２４における観察側のパネル用凹部２４１に液晶表示パネル１０を収容することで、液晶表示装置１が組み立てられる。 After that, when the aligned light guide plate 21 and FPC board 23 are accommodated in the frame 24, the FPC is interposed between the support portion 244 of the frame 24 and the convex portion 213 of the light guide plate 21, as shown in FIG. The joint portion 237 of the substrate 23 is interposed. Here, the overlapping region R1 in which the frame 24 and the convex portion 213 of the light guide plate 21 overlap and sandwich the joint portion 237 of the FPC board 23 has a width H1 of the joint portion 237 so that the entire joint portion 237 can be sandwiched. Is set larger than.
2, the length L1 from the inner side surface 242a of the light guide plate recess 242 in the frame 24 to the inner side surface 212a of the recess 212 in the light guide plate 21 is the main body side of the FPC board 23 when bent. It is set to be smaller than the length L2 from the base end portion 231a to the light source mounting portion side distal end portion 232a. As a result, the light source mounting portion side front end portion 232 a is interposed in the overlapping region of the frame 24 and the light guide plate 21.
If these are fixed to the frame 24, the joint portion 237 and the light source mounting portion side front end portion 232 a of the FPC board 23 are sandwiched between the support portion 244 of the frame 24 and the convex portion 213 of the light guide plate 21. become.
Next, the liquid crystal display panel 10 is accommodated in the panel recess 241 on the observation side of the frame 24, whereby the liquid crystal display device 1 is assembled.

以上のように、本実施形態によれば、ＦＰＣ基板２３における連結部２３４の弾性復元力により光源２２を導光板２１の凹部２１２に向けて付勢するので、常に光源２２が導光板２１に押しつけられ、両者の位置関係が安定化されることになる。また、ＦＰＣ基板２３の本体部２３１が導光板２１の凸部２１３とフレーム２４とによって挟持されるので、組み立て後に振動があったとしても、導光板２１と光源２２との相対的な位置ズレが生じにくくなる。これらのことにより、振動等による導光板２１と光源２２との相対的な位置ズレを防止でき、液晶表示装置１の輝度をより均一にすることができる。   As described above, according to the present embodiment, since the light source 22 is urged toward the concave portion 212 of the light guide plate 21 by the elastic restoring force of the connecting portion 234 in the FPC board 23, the light source 22 is always pressed against the light guide plate 21. Thus, the positional relationship between the two is stabilized. In addition, since the main body portion 231 of the FPC board 23 is sandwiched between the convex portion 213 of the light guide plate 21 and the frame 24, even if there is vibration after assembly, the relative positional deviation between the light guide plate 21 and the light source 22 is not increased. It becomes difficult to occur. By these things, the relative position shift of the light-guide plate 21 and the light source 22 by a vibration etc. can be prevented, and the brightness | luminance of the liquid crystal display device 1 can be made more uniform.

なお、本発明は上記実施形態に限らず適宜変更可能である。
例えば、本実施形態では、ＦＰＣ基板２３の接合部２３７が、フレーム２４の支持部２４４と、導光板２１の凸部２１３とによって単に挟持される場合を例示して説明したが、ＦＰＣ基板２３の接合部２３７と、導光板２１の凸部２１３との間に接着層を介在させて、この接着層により両者を固定すれば、導光板２１と光源２２との相対的な位置ズレをより防止することができる。
また、本実施形態では、導光板２１の各凹部２１２毎に光源２２が１つだけ収容される場合を例示したが、１つの凹部２１２に収容する光源２２は２つ以上であっても構わない。 Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the present embodiment, the case where the joint portion 237 of the FPC board 23 is simply sandwiched between the support portion 244 of the frame 24 and the convex portion 213 of the light guide plate 21 has been described as an example. If an adhesive layer is interposed between the joint portion 237 and the convex portion 213 of the light guide plate 21 and both are fixed by this adhesive layer, relative displacement between the light guide plate 21 and the light source 22 is further prevented. be able to.
Further, in the present embodiment, the case where only one light source 22 is accommodated for each recess 212 of the light guide plate 21 is exemplified, but two or more light sources 22 may be accommodated in one recess 212. .

さらに、本実施形態では、ＦＰＣ基板２３の本体部２３１には、その導光板２１側とは反対側に、第二凹部２３８が複数形成されている場合を例示して説明したが、図６に示すＦＰＣ基板２３ａのように、第二凹部２３８を省略して、本体部２３１における導光板２１側とは反対側の端部を直線状に連続させることも可能である。こうしたことで、第二凹部２３８を設けた場合よりも、本体部２３１の厚みを確保することができ、ＦＰＣ基板２３ａの強度を高めることができる。
また、このＦＰＣ基板２３ａの場合、第二凹部２３８が省略されているので、ＦＰＣ基板２３ａの本体部２３１は図７に示すように重畳領域Ｒ１の端部から、導光板２１とフレーム２４との間に介在することになる。つまり、上記実施形態の場合（例えば図３参照）よりもＦＰＣ基板２３ａにおける導光板２１とフレーム２４とにより挟持される領域が広範囲となる。これにより、より強固にＦＰＣ基板２３ａを固定することが可能となる。 Furthermore, in this embodiment, the case where a plurality of second recesses 238 are formed on the main body portion 231 of the FPC board 23 on the side opposite to the light guide plate 21 side has been described, but FIG. Like the FPC board 23a shown, the second recess 238 can be omitted, and the end of the main body 231 opposite to the light guide plate 21 can be continued linearly. Thus, the thickness of the main body portion 231 can be ensured and the strength of the FPC board 23a can be increased as compared with the case where the second recess 238 is provided.
Further, in the case of this FPC board 23a, since the second recess 238 is omitted, the main body part 231 of the FPC board 23a is connected to the light guide plate 21 and the frame 24 from the end of the overlapping region R1, as shown in FIG. It will be in between. That is, the area sandwiched between the light guide plate 21 and the frame 24 in the FPC board 23a is wider than in the case of the above embodiment (see, for example, FIG. 3). As a result, the FPC board 23a can be more firmly fixed.

１ 液晶表示装置
１０ 液晶表示パネル
１１ 第一基板
１２ 第二基板
２０ バックライト装置
２１ 導光板
２２ 光源
２３ ＦＰＣ基板
２４ フレーム
２１１ 一側部
２１２ 凹部
２１２ａ 内側面
２１３ 凸部
２３１ 本体部
２３２ 光源実装部
２３４ 連結部
２３５ 接続部
２３６ 第一凹部
２３７ 接合部
２３８ 第二凹部
２４１ パネル用凹部
２４２ 導光板用凹部
２４３ 開口
２４４ 支持部 DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 10 Liquid crystal display panel 11 1st board | substrate 12 2nd board | substrate 20 Backlight apparatus 21 Light guide plate 22 Light source 23 FPC board 24 Frame 211 One side part 212 Concave part 212a Inner side surface 213 Convex part 231 Main body part 232 Light source mounting part 234 Connection portion 235 Connection portion 236 First recess 237 Joint portion 238 Second recess 241 Panel recess 242 Light guide plate recess 243 Opening 244 Support portion

Claims (6)

一側部に複数の凸部が設けられた導光板と、
隣接する前記導光板の凸部間領域に配置された光源と、
前記光源が実装されたＦＰＣ基板と、
前記導光板、前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
前記光源が実装される光源実装部と、
前記光源実装部と前記本体部とを連結する連結部と、を有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凸部と前記フレームとにより挟持されるように、前記導光板、前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とするバックライト装置。 A light guide plate provided with a plurality of convex portions on one side,
A light source disposed in a region between adjacent convex portions of the light guide plate;
An FPC board on which the light source is mounted;
A frame that houses the light guide plate, the light source, and the FPC board;
The FPC board is
A main body along one side of the light guide plate;
A light source mounting portion on which the light source is mounted;
A connecting part that connects the light source mounting part and the main body part;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is the convex portion of the light guide plate. The light guide plate, the light source, and the FPC board are accommodated in the frame so as to be sandwiched between the frame and the frame. 隣接する前記導光板の凸部間領域を複数有し、
複数の前記隣接する前記導光板の凸部間領域には複数の前記光源が少なくとも１つずつ収容されることを特徴とする請求項１に記載のバックライト装置。 A plurality of adjacent regions between the convex portions of the light guide plate;
The backlight device according to claim 1, wherein at least one of the plurality of light sources is accommodated in a region between the convex portions of the plurality of adjacent light guide plates. 前記ＦＰＣ基板における前記本体部は、複数の接続部と、前記複数の接続部間をつなぎ、前記光源実装部と前記本体部とを連結する前記連結部が配置される所定領域、を備え、
前記ＦＰＣ基板における前記本体部のうちの前記接続部が、前記導光板の凸部と前記フレームとの間に介在し、挟持されていることを特徴とする請求項１又は２に記載のバックライト装置。 The main body portion of the FPC board includes a plurality of connection portions, and a predetermined region in which the connection portions that connect the light source mounting portions and the main body portion are arranged to connect the plurality of connection portions.
3. The backlight according to claim 1, wherein the connection portion of the main body portion of the FPC board is interposed and sandwiched between a convex portion of the light guide plate and the frame. apparatus. 前記ＦＰＣ基板の前記接続部と前記導光板の凸部とは接着層によって固定されていることを特徴とする請求項１乃至３のいずれか一項に記載のバックライト装置。   4. The backlight device according to claim 1, wherein the connection portion of the FPC board and the convex portion of the light guide plate are fixed by an adhesive layer. 5. 一側部に複数の凹部が設けられた導光板と、
隣接する前記凹部に少なくとも１つずつ配置された複数の光源と、
複数の前記光源が実装されたＦＰＣ基板と、
前記導光板、複数の前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
複数の前記光源が実装される複数の光源実装部と、
複数の前記光源実装部と前記本体部とを連結する複数の連結部とを有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凹部間領域と前記フレームとにより挟持されるように、前記導光板、複数の前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とするバックライト装置。 A light guide plate provided with a plurality of recesses on one side,
A plurality of light sources arranged at least one by one in the adjacent recesses;
An FPC board on which a plurality of the light sources are mounted;
A frame that houses the light guide plate, the plurality of light sources, and the FPC board,
The FPC board is
A main body along one side of the light guide plate;
A plurality of light source mounting portions on which a plurality of the light sources are mounted;
A plurality of light source mounting portions and a plurality of connecting portions that connect the main body portion;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is between the recesses of the light guide plate. The backlight device, wherein the light guide plate, the plurality of light sources, and the FPC board are accommodated in the frame so as to be sandwiched between a region and the frame. バックライト装置と、
前記バックライト装置の観察面側に配置された液晶表示パネルと、を有する液晶表示装置において、
前記バックライト装置は、
一側部に複数の凸部が設けられた導光板と、隣接する前記導光板の凸部間領域に配置された光源と、
前記光源が実装されたＦＰＣ基板と、
前記導光板、前記光源及び前記ＦＰＣ基板を収容するフレームと、を備え、
前記ＦＰＣ基板は、
前記導光板の一側面に沿う本体部と、
前記光源が実装される光源実装部と、
前記光源実装部と前記本体部とを連結する連結部と、を有し、
弾性変形した前記ＦＰＣ基板の前記連結部が弾性復元力により前記光源を前記導光板の面側に向けて付勢するように、且つ、前記ＦＰＣ基板の前記本体部が前記導光板の前記凸部と前記フレームとにより挟持されるように、前記導光板、前記光源及び前記ＦＰＣ基板が前記フレームに収容されていることを特徴とする液晶表示装置。 A backlight device;
In a liquid crystal display device having a liquid crystal display panel disposed on the observation surface side of the backlight device,
The backlight device includes:
A light guide plate provided with a plurality of convex portions on one side, and a light source disposed in a region between the convex portions of the adjacent light guide plates;
An FPC board on which the light source is mounted;
A frame that houses the light guide plate, the light source, and the FPC board;
The FPC board is
A main body along one side of the light guide plate;
A light source mounting portion on which the light source is mounted;
A connecting part that connects the light source mounting part and the main body part;
The connecting portion of the elastically deformed FPC board urges the light source toward the surface of the light guide plate by elastic restoring force, and the main body portion of the FPC board is the convex portion of the light guide plate. The light guide plate, the light source, and the FPC board are accommodated in the frame so as to be sandwiched between the frame and the frame.
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