201250344 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組，且特別是有關於一種可避 免導光板因膨脹撞傷光源的背光模組。 【先前技術】 液晶顯示器(liquid crystal display，LCD)主要係由一液晶 面板及一背光模組所構成。值得注意的是，由於液晶面板中所 注入之液晶本身不會發光，因此，必需透過背光模組所提供之 面光源來點亮液晶面板’以使液晶顯示器達到顯示的效果。由 此可知，为光模組在液晶顯示器中扮演著相當重要的角色。 煮光模組可依其光源之配置位置而分為直下式背光模組 與側面入光式背光模組。以側面入光式背光模組來說，由於目 前的顯示模組均朝薄型化的趨勢發展，因此導光板的厚度也必 須隨之薄型化。然而，由於導光板容易因吸濕或受熱而膨脹， 因此如何避免導光板膨脹延伸後撞擊到光源而導致光源損 壞，或疋薄型導光板因機械強度不足而在受熱後受到其他元件 的側向擠壓而變形，均為目前亟欲解決的問題。 【發明内容】 有鑑於此，本發明提供一種背光模組，其光源在導光板臉 脹延伸時可免於受到損傷。 / 本發明提出-種背光模組，包括背板、多個發光二極體、 導光板、至少一個定位件以及多個第一緩衝件。背板具有第一 内壁、第二内壁、第三内壁以及第四内壁，其中第一内壁相對 201250344 於第二内劈，结— 壁相交於第内Ϊ相對於細内壁H内壁與第二内 第-内壁、第'㈤内壁與第二内壁相交於第二角 一 第—内壁、第三内壁及第 導光板則是配置於 這些發光—個容置空間 容體置於第—内壁上， 第-角洛與第二角落。其中，第一 剛性。 位件置於2 ’導光板具有相對於第-内壁的入光面。定 些第：緩間内’並位於導光板與第-内壁之間。： 二内壁之間，並鄰近 緩衝件的剛性小於定位件的 内 而且， 緩衝件本ίΓ上—述之f域組更包括多個第 壁及第四内壁第之疋斤酉f在導光板與背板的第三 i士此笛/之$並鄰近上述第—角落與第二角落。 第—_件_性小於上述定位件的剛性。 盘第在一實施例中’鄰近上述第-角落的第-緩衝件 第且鄰近上述第二角落的第-緩衝件與 愈第在實施财，鄰近上述第—祕的第一緩衝件 第=:=型，鄰近上述第二角落的第™ t發明之—實施例中’上述各第—緩衝件包括本體部以 又。卩，且段差部位於本體部與上述導光板之間。 在本發明之-實施例中’上述各第一緩_具有第一表 面’且上述導光板具有出絲’第—緩衝件的第—表面大致平 行於出光面，且第一表面具有至少一個溝槽。 在本發明之-實施例中’上述之背光模組更包括電路板及 連接器。電路板係貼附於背板之第一内壁上，且上述這些發光 201250344 在本發明之一實施例中， 於上述連接器與導光板之間。 上述之定位件包括金屬片 ，設置 鄰近第一内壁的角 而位於導光板與第 在本發明之一實施例中，上述之導光板 落具有缺口，而上述定位件係對應至此缺口 三内壁或第四内壁之間。 之背光模組是藉由剛性不同蚊位件與緩衝件來 元成導光㈣定位，且職較大的定位件是位於導光板與 η因此可避免導光板在吸濕或受熱膨腺時撞擊光源而導致 或絲損傷，亦可避免導光板在做衝擊試驗時撞傷光源 ^導光板。_錄小賴衝件射在導光板吸減受熱膨服 2應導歧所辭的作用力而漏變形，㈣免導光板在膨 脹時因受到侧向擠壓力而變形。 為讓本發明之上述和其他目的、特徵和優點能更明顯易 Μ ’下文特舉較佳實施例，並配合所附圖式，作詳細綱如下。 【實施方式】 圖1是本發明-實施例之一種背光模組的上視示意圖，圖 2則為圖1之背紐組的側視圖。請先參照圖丨，背賴組⑽ ，括背板11。、多個發光二極體12G、導光板13G、至少一個 疋位件140以及多個第一緩衝件15〇。背板11〇具有第一内壁 in、第二内壁112、第三内壁113以及第四内壁114，其中第 内壁m相對於第二内壁112，第三内壁113相對於第四内 壁114,且第三内壁113與第二_112相交於第一角紅卜 201250344 第四内壁114與第二内壁112相交於第二角落C2。而第一内 壁111、第二内壁112、第三内壁113及第四内壁114圍成一 個容置空間115。 請同時參照圖1及圖2,這些發光二極體12〇是配置於背 板11〇的第一内壁lu上。詳細來說，這些發光二極體12〇是 ，置於電路板122上，並電性連接至電路板122,而電路板122 疋貼附於第一内壁11丨上。另一方面，電路板122則是電性連 接至連接器124，以透過連接器124與外部電路電性連接。在 本實施例中，連接器124是配置在背板11()上並鄰近第一内壁 111。詳細來说’連接器124配置於電路板122上並電性連接 至發光二極體120,且連接器124位於導光板130與電路板122 之間。 導光板130是配置於容置空間115内，並具有相對於第一 内壁111的入光面132。發光二極體12〇所發出之光線即是經 由入光面132入射導光板13〇，以藉由導光板13〇將發光二極 體120所發出之光線轉換為面光源出射。具體來說，導光板 130還具有與入光面132相鄰的出光面134，而射至導光板13〇 内部的光線即是經由出光面134出射。 疋位件140是設置於容置空間115内，並位於導光板13〇 與第一内壁111之間，因而可避免導光板13〇因受外力影響朝 第一内壁111移動而撞擊至發光二極體12〇，以防止發光二極 ，120損壞。在本實施例中，定位件14〇可以是圓柱體。或者， 定位件140也可以是設置於連接器ι24與導光板13〇之間的金 屬片，以避免導光板130撞擊連接器124而造成連接器124損 壞。 值得一提的是’本實施例之導光板13〇的角落例如是具有 201250344 缺口 136，而定位件〗4〇即是對應缺口 136而位於導光板130 與第三内壁113或導光板130與第四内壁114之間。 第一緩衝件150是配置於導光板130與背板11〇之第二内 壁112之間，並鄰近第一角落C1與第二角落c2。特別的是， 第一緩衝件150的剛性小於定位件14〇的剛性。在本實施例 中’疋位件140的材質例如是金屬，第一緩衝件15〇的材質則 例如是橡膠或其他可撓性材料。 承上所述，背光模組100是藉由定位件14〇以及第一緩衝 件150將導光板13〇定位於第一内壁1U與第二内壁ιι2之 間而且，由於導光板130與發光二極體丨2〇之間設置有剛性 大，不易變形的定位件14〇，導光板130與第二内壁112之間 則疋设置有具有可撓性的第一緩衝件15〇，因此當導光板13〇 因所處環境的溫度升高⑽脹時，導输13G會朝第二内壁 U2,的方向膨脹延伸而擠壓第一緩衝件15〇。由此可知，即使 導光板13G因所處之環境溫度的變化而產生熱漲冷縮的情 ^仍可藉由定位件140與第一緩衝件15〇將導光板13〇定位 ^ t之第—内壁1U與第二内壁112之間，避免導光板130 產生過大的位移量’進轉持背光模組議的出光品質。 值得-提的是，為了將導光板13()彈性地固定於第三内壁 括/伽^四内壁114之間，本實施例之背光模組_還可以包 =，第二緩衝件160 ’其係分別配置於導光板n ^巧及第四㈣114之間，並分聊近第-祕c：與 洛C2°而且’第二緩衝件160的剛性亦小於定位件130 ΓΐιΓ1所示，鄰近第一角落C1的第-緩衝件150與 t 此相連’鄰近第二角落C2的第-緩衝㈣ 、第-_件_亦彼此相連。而且，在本實施例中，相連之 201250344 第一緩衝件150與第二緩衝件160可以是以一體成型的方式製 成。 另一方面，本實施例之第一緩衝件.150例如是由本體部 152及段差部154所構成，同樣地，第二緩衝件16〇也可以是 由本體部162及段差部164所構成。段差部154是位於本體部 152與導光板130之間’段差部164則是位於本體部162與導 光板130之間。詳細來說，在垂直導光板13〇之出光面134的 方向上’段差部154及段差部164的高度例如是分別低於本體 部152與本體部162。 如圖2所示，背光模組1〇〇通常還包括有卡合於背板11〇 上的膠框170，以將導光板130及其他位於導光板GO上的光 學膜片（圖未示）固定於容置空間US内。在本實施例中， 當導光板130因吸濕或受熱膨脹而擠壓第一緩衝件15〇時，段 差部154會因受力變形而導致其平行於出光面134的表面155 有些微隆起。然而’由於段差部154與膠框17〇間隔一段距離， 即使段差部154因受擠壓而使表面155隆起，表面155亦未接 觸至膠框170’因此可維持膠框17〇與背11〇之間的卡合強 度。同樣的，第二緩射M60的段差部164亦具有相同之功能。 換言之，本實施例之第一緩衝件15〇及第二緩衝件16〇可避免 其在受到賴而變職，轉框m施予非 使得膠框170與背板110分離。 β ^ _ 特別的是，在本發明之另一實施例中，如圖3所示，也可 =別在第-緩衝件150之表面156以及第二緩衝件16〇之表 上形成溝槽157及溝槽167，以避免第一緩衝件15〇在 j導光板⑽的擠壓時導致表面156及表面⑹ 現象。在此，表面156及表面166是大致平行於導光 201250344 出光面134。詳細來說，溝槽157及溝槽i67可 第一緩衝件150及第二緩衝件16〇的孔洞，也可 小於第一緩衝件150及第二緩衝件160之厚度的孔洞。.溝^ 157及溝：167的深度可分別視第-緩衝件15〇及第^ =〇之預⑧機械強度來決定’本發明不在此做任何限定。於201250344 VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a backlight module that can prevent a light guide from colliding with a light source due to expansion. [Prior Art] A liquid crystal display (LCD) is mainly composed of a liquid crystal panel and a backlight module. It is worth noting that since the liquid crystal injected in the liquid crystal panel does not emit light by itself, it is necessary to illuminate the liquid crystal panel through the surface light source provided by the backlight module to achieve the display effect of the liquid crystal display. It can be seen that optical modules play a very important role in liquid crystal displays. The boiling light module can be divided into a direct type backlight module and a side light input type backlight module according to the position of the light source. In the case of a side-lit backlight module, since the current display module is trending toward thinning, the thickness of the light guide plate must also be reduced. However, since the light guide plate is easily expanded by moisture absorption or heat, how to avoid the light source plate from being damaged after the expansion and extension of the light guide plate causes the light source to be damaged, or the thin light guide plate is laterally squeezed by other components after being heated due to insufficient mechanical strength. Pressing and deforming are all problems that are currently being solved. SUMMARY OF THE INVENTION In view of the above, the present invention provides a backlight module in which a light source is protected from damage when the light guide plate is extended in a face. The present invention provides a backlight module including a back plate, a plurality of light emitting diodes, a light guide plate, at least one positioning member, and a plurality of first buffer members. The back plate has a first inner wall, a second inner wall, a third inner wall and a fourth inner wall, wherein the first inner wall is opposite to the second inner lining of 201250344, and the knot-wall intersects the inner inner Ϊ with respect to the inner wall of the thin inner wall H and the second inner first - the inner wall, the (5) inner wall and the second inner wall intersect at the second corner - the first inner wall, the third inner wall and the light guide plate are disposed on the first inner wall of the light-storing space, the first Corner Luo and the second corner. Among them, the first rigidity. The bit member is placed on the 2' light guide plate having a light incident surface with respect to the first inner wall. The first portion: the inner portion is located between the light guide plate and the first inner wall. : between the two inner walls, and adjacent to the cushioning member, the rigidity of the cushioning member is smaller than that of the positioning member, and the cushioning member is further composed of a plurality of the first wall and the fourth inner wall. The third ishi of the backboard is $ and is adjacent to the first corner and the second corner. The first member is less than the rigidity of the above positioning member. In an embodiment, the first cushioning member adjacent to the first cushioning member adjacent to the first-corner is adjacent to the first cushioning member, and the first cushioning member adjacent to the first secret is: = type, adjacent to the second corner of the TMt invention - in the embodiment, the above-mentioned respective first buffer members include a body portion to be further.卩, and the step portion is located between the body portion and the light guide plate. In the embodiment of the present invention, 'the first first _ has a first surface ′ and the light guide plate has a first surface of the filament 'the first cushioning member substantially parallel to the light emitting surface, and the first surface has at least one groove groove. In the embodiment of the present invention, the backlight module further includes a circuit board and a connector. The circuit board is attached to the first inner wall of the backboard, and the above illuminations 201250344 are in an embodiment of the invention between the connector and the light guide. The locating member includes a metal piece disposed adjacent to the first inner wall and located in the light guide plate. In the embodiment of the present invention, the light guide plate has a notch, and the positioning member corresponds to the inner wall of the notch or the third Between the four inner walls. The backlight module is guided by the different rigid mosquito parts and the buffering member to guide the light (4), and the larger positioning member is located on the light guide plate and the η, thereby preventing the light guide plate from colliding when absorbing or expelling the heat. The light source causes damage to the wire, and can also prevent the light guide plate from colliding with the light source and the light guide plate during the impact test. _ recorded Xiaolai stamping on the light guide plate to absorb the heat and expand the service. 2 should be biased by the force of the word and leak deformation, (4) the light guide plate is deformed due to lateral compression force when expanding. The above and other objects, features and advantages of the present invention will become more apparent. 1 is a top view of a backlight module according to an embodiment of the present invention, and FIG. 2 is a side view of the back button group of FIG. 1. Please refer to Figure 丨 first, and rely on the group (10), including the backboard 11. A plurality of light-emitting diodes 12G, a light guide plate 13G, at least one of the clamp members 140, and a plurality of first buffer members 15A. The back plate 11 has a first inner wall in, a second inner wall 112, a third inner wall 113, and a fourth inner wall 114, wherein the first inner wall m is opposite to the second inner wall 112, the third inner wall 113 is opposite to the fourth inner wall 114, and the third The inner wall 113 intersects the second _112 at the first corner red 201250344. The fourth inner wall 114 intersects the second inner wall 112 at the second corner C2. The first inner wall 111, the second inner wall 112, the third inner wall 113, and the fourth inner wall 114 enclose an accommodation space 115. Referring to Fig. 1 and Fig. 2 together, the light-emitting diodes 12A are disposed on the first inner wall lu of the back plate 11A. In detail, the LEDs 12 are placed on the circuit board 122 and electrically connected to the circuit board 122, and the circuit board 122 is attached to the first inner wall 11A. On the other hand, the circuit board 122 is electrically connected to the connector 124 to be electrically connected to the external circuit through the connector 124. In the present embodiment, the connector 124 is disposed on the back plate 11 () and adjacent to the first inner wall 111. In detail, the connector 124 is disposed on the circuit board 122 and electrically connected to the light emitting diode 120, and the connector 124 is located between the light guide plate 130 and the circuit board 122. The light guide plate 130 is disposed in the accommodating space 115 and has a light incident surface 132 with respect to the first inner wall 111. The light emitted from the light-emitting diode 12 is incident on the light guide plate 13 through the light-incident surface 132, and the light emitted from the light-emitting diode 120 is converted into a surface light source by the light guide plate 13A. Specifically, the light guide plate 130 further has a light exit surface 134 adjacent to the light incident surface 132, and the light incident on the light guide plate 13 is emitted through the light exit surface 134. The clamping member 140 is disposed in the accommodating space 115 and located between the light guide plate 13 〇 and the first inner wall 111, thereby preventing the light guide plate 13 from colliding to the light emitting diode due to the external force being affected by the movement of the first inner wall 111 Body 12 〇 to prevent the light-emitting diode, 120 damage. In this embodiment, the positioning member 14A may be a cylinder. Alternatively, the positioning member 140 may be a metal piece disposed between the connector ι24 and the light guide plate 13A to prevent the light guide plate 130 from striking the connector 124 to cause damage to the connector 124. It is worth mentioning that the corner of the light guide plate 13 of the present embodiment has, for example, a notch 136 of 201250344, and the positioning member 4 is the corresponding notch 136 and is located at the light guide plate 130 and the third inner wall 113 or the light guide plate 130 and the first Between the four inner walls 114. The first buffer member 150 is disposed between the light guide plate 130 and the second inner wall 112 of the back plate 11A, and adjacent to the first corner C1 and the second corner c2. In particular, the rigidity of the first cushioning member 150 is smaller than the rigidity of the positioning member 14A. In the present embodiment, the material of the clamp member 140 is, for example, metal, and the material of the first cushion member 15 is, for example, rubber or other flexible material. As described above, the backlight module 100 positions the light guide plate 13 于 between the first inner wall 1U and the second inner wall ι 2 by the positioning member 14 〇 and the first buffer member 150, and the light guide plate 130 and the light emitting diode Between the body 2丨, a positioning member 14〇 having a large rigidity and being difficult to be deformed is disposed, and between the light guiding plate 130 and the second inner wall 112, a first cushioning member 15〇 having flexibility is disposed, so that when the light guiding plate 13 is provided When the temperature of the environment is increased (10), the guide 13G expands and extends toward the second inner wall U2 to press the first cushioning member 15A. Therefore, even if the light guide plate 13G is heated and contracted due to the change of the ambient temperature, the position of the light guide plate 13 can be positioned by the positioning member 140 and the first buffer member 15〇. Between the inner wall 1U and the second inner wall 112, the light guide plate 130 is prevented from generating an excessive displacement amount of the light-receiving quality of the backlight module. It is worth mentioning that, in order to elastically fix the light guide plate 13 () between the third inner wall/fourth inner wall 114, the backlight module _ of the embodiment may also include a second buffer member 160' They are respectively disposed between the light guide plate n ^ and the fourth (four) 114, and are divided into the first-secret c: and the C2 ° and the rigidity of the second buffer member 160 is also smaller than that of the positioning member 130 ΓΐιΓ1, adjacent to the first The first buffer member 150 of the corner C1 is connected to t. The first buffer (four) and the first member _ adjacent to the second corner C2 are also connected to each other. Moreover, in the present embodiment, the connected 201250344 first cushioning member 150 and the second cushioning member 160 may be formed in one piece. On the other hand, the first cushioning member 150 of the present embodiment is constituted by, for example, the main body portion 152 and the step portion 154. Similarly, the second cushioning member 16b may be constituted by the main body portion 162 and the step portion 164. The step portion 154 is located between the body portion 152 and the light guide plate 130. The step portion 164 is located between the body portion 162 and the light guide plate 130. In detail, the heights of the step portion 154 and the step portion 164 in the direction of the light-emitting surface 134 of the vertical light guide plate 13 are, for example, lower than the body portion 152 and the body portion 162, respectively. As shown in FIG. 2, the backlight module 1A further includes a plastic frame 170 that is engaged with the back plate 11A to guide the light guide plate 130 and other optical films on the light guide plate GO (not shown). It is fixed in the accommodating space US. In the present embodiment, when the light guide plate 130 is pressed against the first cushioning member 15 due to moisture absorption or thermal expansion, the step portion 154 may be slightly raised due to the force deformation to be parallel to the surface 155 of the light exit surface 134. However, since the step portion 154 is spaced apart from the frame 17〇, even if the step portion 154 is embossed to cause the surface 155 to bulge, the surface 155 does not contact the frame 170' so that the frame 17 and the back can be maintained. The strength of the fit between the two. Similarly, the step portion 164 of the second slow-motion M60 also has the same function. In other words, the first cushioning member 15A and the second cushioning member 16A of the embodiment can be prevented from changing due to the change, and the frame m is not applied to separate the plastic frame 170 from the backing plate 110. β ^ _ In particular, in another embodiment of the present invention, as shown in FIG. 3, it is also possible to form the groove 157 on the surface 156 of the first buffer member 150 and the surface of the second buffer member 16 And the groove 167 to prevent the first cushioning member 15 from causing the surface 156 and the surface (6) phenomenon when the j light guide plate (10) is pressed. Here, surface 156 and surface 166 are substantially parallel to the light guide surface 134 of 201250344. In detail, the grooves 157 and the grooves i67 may have holes smaller than the first buffer member 150 and the second buffer member 160, and may be smaller than the holes of the first buffer member 150 and the second buffer member 160. The depth of the groove 157 and the groove: 167 may be determined depending on the first 8 mechanical strengths of the first cushioning member 15 and the first = 〇, respectively. The present invention is not limited thereto. to
l67mb'm J 槽157及溝槽167彼此獨立。 =要注意的是，為使SJ式較為簡潔㈣ 鄰近第二祕C2之第-緩衝件15Ω^—I 增以 上毅說明，但熟習此技藝者應該知道，^近 ^緩衝件150與第二緩衝件働亦可設計為具有段差或溝 體是發明之背光模組中’作為光源的發光二極 =配置於找的第-内壁上，且導光板與第—内壁之間設置 由二::牛杜而導光板與背板之第二内壁之間則設置有緩衝件。 由於疋位件的剛性大於緩衝件的剛性，因此去 =時，可避免導光板朝向發光二極體膨;延伸，二 一 Γ膨脹延伸而擠壓緩衝件。由於緩衝件的剛性夠 二因此當導光板因吸濕或受 ΐ，導光板制側向擠壓力而變形。而 生的下降而縮小至原尺寸時，導光板可能產 的極小，因此可使#光模組具有穩定的出光品質。 衝件來―成本發明之背光模組是藉由定位件與緩 背】模::::::度能夠避免光線在凸耳處聚光，進而提升 201250344 雖然本發明已以較佳實施例揭露如上，然其並 本發明’任何熟習此技藝者，在不脫離本發明之 = 内’當可作些許之更動與潤飾，因此本發明 ^ ^ 附之申請專職_界定者鱗。 ㈣視後 【圖式簡單說明】The l67mb'm J slot 157 and the slot 167 are independent of each other. = It should be noted that in order to make the SJ style more concise (four) adjacent to the second secret C2 - the buffer member 15 Ω ^ - I increase the above description, but those skilled in the art should know that ^ ^ buffer member 150 and the second buffer The piece can also be designed to have a step or groove. In the backlight module of the invention, the light-emitting diode as the light source is disposed on the first inner wall, and the light guide plate and the first inner wall are arranged by two: A buffer member is disposed between the light guide plate and the second inner wall of the back plate. Since the rigidity of the clamping member is greater than the rigidity of the cushioning member, when the = is removed, the light guiding plate can be prevented from being swollen toward the light emitting diode; the extension is extended, and the buffer member is extruded to press the cushioning member. Since the cushioning member has a rigidity of two, the light guide plate is deformed by the lateral pressing force when the light guide plate is wetted or received. When the growth is reduced to the original size, the light guide plate may be produced to a very small extent, so that the #光模块 has a stable light output quality. The present invention has been disclosed in the preferred embodiment by means of a positioning member and a slow-back modulo:::::: degree to avoid concentrating light at the lugs, thereby improving 201250344 As described above, the present invention can be modified and retouched without departing from the present invention. Therefore, the present invention is attached to a full-time _ defineer scale. (4) After viewing [Simple description of the diagram]
圖1是本發明-實施例之—種背光模組的上視示音 圖2為圖1之背光模組的侧視圖。 圖3是本發明另-實施例之—種背光模組的上視示意圖 【主要元件符號說明】 100:背光模組 110 背板 111 第一内壁 112 第二内壁 113 第三内壁 114 第四内壁 115 容置空間 120 發光二極體 122 電路板 124 連接器 130 導光板 132 入光面 134 出光面 136 缺口 140 定位件 201250344 150 :第一緩衝件 152、162 :本體部 154、 164 :段差部 155、 156、166 :表面 157、167 ·•溝槽 160 :第二緩衝件 170 :膠框 C1 :第一角落 C2 :第二角落1 is a top view of a backlight module of the present invention - FIG. 2 is a side view of the backlight module of FIG. 1. 3 is a top view of a backlight module according to another embodiment of the present invention. [Main component symbol description] 100: backlight module 110 back plate 111 first inner wall 112 second inner wall 113 third inner wall 114 fourth inner wall 115 Accommodating space 120 light-emitting diode 122 circuit board 124 connector 130 light guide plate 132 light-incident surface 134 light-emitting surface 136 notch 140 positioning member 201250344 150: first buffer member 152, 162: body portion 154, 164: step portion 155, 156, 166: surface 157, 167 · • groove 160: second buffer 170: plastic frame C1: first corner C2: second corner