TWI303340B - Liquid crystal display and back light module thereof - Google Patents
Liquid crystal display and back light module thereof Download PDFInfo
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1303340 五、發明說明(1) — — " " " *- 【發明所屬之技術領域】1303340 V. INSTRUCTIONS (1) — — """ *- [Technical field to which the invention belongs]
本發明係有關於一種液晶顯示器及其背光模組,特別 是有關於一種直下式液晶背光 ,其可有效地 I 效率以達到更高輝度之要求。 门政熱 【先前技術】 一般液晶顯示器中之液晶顯示單元係使用背光模 供所需之光源,並且就背光模組之種類而言,通常可;;乂 端緣式(edge Ught type)以及直下式(direct light 、、 type)兩大類。由於本發明係針對直下式背光模組作改 良,以下僅就直下式背光模組的構成提出說明, 其端緣^背光模組的說明予以省略。 万將 如第1圖所示之日本專利特開2〇〇1-297 -種背光裝置!。,包括一反射板n、一光擴散板12、= 個營光燈管13、_螢光燈管支持⑽、以及兩隼光^數 ::反射板11位於背光模組1〇的底部管’ 的光反射出背光模組10 ’且其為箱型,並::二13 以及兩侧板1 12,側柘n ?八w y ^ 底板1 11 底板112垂直地延伸.光_^^,9於底板ln的兩端,且從 光模組i◦的光源,且係設以::=燈管13係作為背 之底板ill間具有一間隔隹止支/夺'14上,而舆反射板11 本光片1 5係位於光据|搞1 ?的 出光面上,以產生提高輝度的效果。、光擴政板12的 由於背光模組所需的輝度 數量及供认雷力扃丁啦如 又不畊如阿’其内螢光燈管的 數里及供口電力也不斷提高,然而,這將使得背光模組内 第5頁 0632-A50040TWf(Nl) · AU0308012 ; yuchia.ptd 1303340 五、發明說明(2) — 的溫度也隨之提高,而導致即使增加了螢光燈管的數量及 供給電力,卻無法增加輝度的情況,詳而言之,由於背光 模組内的溫度過高,使得其輝度反而會隨著操作時間的增 加而降低。 曰 為了改善上述情況,在反射板1 1 2上形成複數個開口 23,以與螢光燈管13垂直之側面對流的方式,降低螢光燈 管1 3的周圍溫度,並可防止背光模組内的溫度過高。The present invention relates to a liquid crystal display and a backlight module thereof, and more particularly to a direct type liquid crystal backlight which can effectively achieve efficiency to achieve higher luminance. Door Government Hot [Prior Art] The liquid crystal display unit in a general liquid crystal display uses a backlight mode to supply a desired light source, and in terms of the type of the backlight module, generally; an edge Ught type and a straight down (direct light, type) two categories. Since the present invention is improved for the direct type backlight module, the following description only describes the configuration of the direct type backlight module, and the description of the edge of the backlight module is omitted. Wan will be as shown in Figure 1 of the Japanese Patent Special Opening 2〇〇1-297 - a kind of backlight device! , including a reflector n, a light diffusing plate 12, = a camping light tube 13, a fluorescent tube support (10), and two light:: the reflector 11 is located at the bottom tube of the backlight module 1' The light reflects off the backlight module 10' and is box-shaped, and:: two 13 and two sides of the board 1 12, side 柘 n 八 wy ^ bottom plate 1 11 bottom plate 112 extends vertically. Light _ ^ ^, 9 The two ends of the bottom plate ln, and the light source from the optical module i, are arranged such that::=the lamp tube 13 has a space between the bottom plate ill and the bottom plate ill has a spacer stop/received '14, and the reflective plate 11 The light sheet 15 is located on the light-emitting surface of the light source 1 to produce an effect of increasing the brightness. The number of brightness required for the backlight module and the confession of the light-reinforcing board 12, such as the number of the fluorescent tubes in the fluorescent tube, and the power supply to the port are also increasing. However, this The temperature of the fifth page of the backlight module, 0632-A50040TWf(Nl) · AU0308012; yuchia.ptd 1303340, invention description (2), will be increased, resulting in an increase in the number and supply of fluorescent tubes. Electricity, but can not increase the brightness of the situation, in detail, because the temperature inside the backlight module is too high, its brightness will decrease with the increase of operating time. In order to improve the above situation, a plurality of openings 23 are formed on the reflecting plate 112 to reduce the ambient temperature of the fluorescent tube 13 by convection on the side perpendicular to the fluorescent tube 13, and the backlight module can be prevented. The temperature inside is too high.
然而,由於設置於反射板11上的開口 23之位置是在反 射板11之兩侧112,開口23距離燈管13較遠,產生之對流 方向無法有效地降低中間燈管溫度,因此對燈管所產生之 熱量無法均勻地散出,因此仍不能解決散熱問題,造 光燈管無法達到最佳的工作溫度,而使背光 A 輝度降低。 ^ ^ , … ▼ —v个匁此问壳度不足之問 碭,亚且燈管之漏電流較高,使得柃 到最佳化。 使以官之發光效率無法達 【發明内容】 有鑑於此,本發明之目的在於一 可增加散熱面積,有效地提高輝度。八 月光模組,其 本發明之另一目的在於提供— 光模組,其可降低燈管之漏電流示器以及其背 根據本發明,提供一種背光模‘之發光效率。 複數長條形光源,底板具有複數散埶揭匕,一底板以及 底板且彼此平行。複數長條形光“'、s孔’政熱槽孔貫穿 先原與散熱槽孔平行,光源However, since the position of the opening 23 provided on the reflecting plate 11 is on both sides 112 of the reflecting plate 11, the opening 23 is far from the tube 13, and the convection direction generated cannot effectively lower the temperature of the intermediate tube, so the tube is The heat generated cannot be uniformly dissipated, so the heat dissipation problem cannot be solved, and the illumination lamp can not reach the optimum operating temperature, and the backlight A brightness is lowered. ^ ^ , ... ▼ —v 匁 问 问 问 问 问 问 砀 砀 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚In view of the above, it is an object of the present invention to increase the heat dissipation area and to effectively increase the luminance. The october module, another object of the present invention is to provide an optical module which can reduce the leakage current of the lamp and its back. According to the present invention, a luminous efficiency of the backlight module is provided. A plurality of elongated light sources, the bottom plate having a plurality of bottom plates, a bottom plate and a bottom plate and parallel to each other. The plurality of long strips of light "', s hole" political hot slot runs through the original and the heat sink slot parallel, the light source
13033401303340
五、發明說明(3) 所產生之熱量經由散熱槽孔而逸散。 在一較佳實施例中,背光模組更包括複數反射器,設 置於底板以及長條形光源之間。 ^另一較佳實施例中,每一反射器具有一反射曲面及 一支推部,反射曲面經由支撐部而連結於底板。 此外’底板更具有至少一穿孔,支撐部係嵌合於穿孔 月光模組更包括一光擴散板,長條形光源係設置於反 射曲面與擴散板之間。、 光擴散板與長條形光源之間具有一第一既定距離,反 射曲面之曲率係由長條形光源之間的距離以及第一既定距 離而決定。 又,每一散熱槽孔係位於相鄰的反射器之間。 •在另一較佳實施例中,底板及反射器係一體成型。 反射器係由塑膠所製成,塑膠之光反射率為9 5 %以 上。 ^在另一較佳實施例中,其中長條形光源為一螢光燈 管。 又在本發明中,提供一種液晶顯示器,其包括一殼體 、一=晶面板以及一背光模組,液晶面板係設置於殼體之 中,月光模組係以相對於液晶面板而設置於殼體之中,背 光模組包括一底板、複數長條形光源及複數反射器,底^ 具有複數散熱槽孔,散熱槽孔貫穿底板且彼此平行。複數 長條形光源舆散熱槽孔平行,光源所產生之熱量經由散熱V. Description of the Invention (3) The heat generated is dissipated through the heat dissipation slot. In a preferred embodiment, the backlight module further includes a plurality of reflectors disposed between the bottom plate and the elongated light source. In another preferred embodiment, each of the reflectors has a reflective curved surface and a pushing portion that is coupled to the bottom plate via the support portion. In addition, the bottom plate further has at least one perforation, and the support portion is fitted to the perforated moonlight module and further comprises a light diffusing plate, and the elongated light source is disposed between the reflective curved surface and the diffusing plate. There is a first predetermined distance between the light diffusing plate and the elongated light source, and the curvature of the reflecting curved surface is determined by the distance between the elongated light sources and the first predetermined distance. Also, each of the heat dissipation slots is located between adjacent reflectors. • In another preferred embodiment, the base plate and the reflector are integrally formed. The reflector is made of plastic, and the light reflectivity of the plastic is above 95%. In another preferred embodiment, wherein the elongated light source is a fluorescent tube. In the present invention, a liquid crystal display includes a casing, a crystal panel, and a backlight module. The liquid crystal panel is disposed in the casing, and the moonlight module is disposed on the casing with respect to the liquid crystal panel. In the body, the backlight module comprises a bottom plate, a plurality of elongated light sources and a plurality of reflectors, and the bottom portion has a plurality of heat dissipation slots, and the heat dissipation slots penetrate the bottom plate and are parallel to each other. The long strip light source is parallel to the heat sink slot, and the heat generated by the light source is radiated
!303340 五、發明說明(4) ------ 一 間。而逸政。複數反射器係設置於底板以及長條形光源之 明顯^ ^讓本發^之上述和其他目的、特徵、和優點能更 詳& 下文彳寸舉一較佳實施例,並配合所附圖示,作 ^㈤况明如下。 【實施方式】 面板4如以昂】f所示’、=晶顯示器1包括上下殼體3、-液晶 3之中,北、、^下式背光模組30,液晶面板4係設置於殼體 之中,太月获光极組3 〇係以相對於液晶面板4而設置於殼體3 線之經疮^明主要是改良背光模組3 0之散熱功效及反射光 =又,/因此省略說明液晶顯示器中之其他元件。 卢;r f。圖係顯不本發明之背光模組3 0之分解立體圖,背 包括—光擴散板33、—底板31、—支持台34、複 数長條形光源(燈管)36及複數反射器37。 j下便分別對於光擴散板33、底板31、支持台、複 ^ 形光源(燈管)3 6及複數反射器3 7之結構及其相互間 的連接關係提出說明。 、。光擴散板3 3係位於底板3 1之最上方,支持台3 4係用以 ^撐光源36 ’而各光源36分別以不與反射器37接觸的方式 。又置於支持台34上,且背光模組3〇的光源可為一螢光燈管 :=複數反射器37係設置於底板31以及光源36之間,用以 將酱光燈管的光反射出背光模組3〇。底板31上具有複數散 熱槽孔32,散熱槽孔32貫穿底板31,每一槽孔3 2係彼此平!303340 V. Description of invention (4) ------ One. And Yizheng. The above-described and other objects, features, and advantages of the present invention will be apparent from the above-described and other objects, features and advantages of the present invention. Show, make ^ (five) as follows. [Embodiment] The panel 4 is shown in the following figure, and the crystal display 1 includes the upper and lower housings 3 and 3, and the liquid crystal panel 4 is disposed in the housing. Among them, the Taiyue obtained the photoreceptor group 3 is arranged on the line of the housing 3 with respect to the liquid crystal panel 4, and the heat dissipation effect and the reflected light of the backlight module 30 are improved. Explain other components in the LCD display. Lu; r f. The figure shows an exploded perspective view of the backlight module 30 of the present invention, and the back includes a light diffusing plate 33, a bottom plate 31, a support table 34, a plurality of elongated strip light sources (lamp tubes) 36, and a plurality of reflectors 37. Next, the structure of the light diffusing plate 33, the bottom plate 31, the support table, the complex light source (lamp) 36, and the complex reflector 37, and the connection relationship therebetween will be described. ,. The light diffusing plate 3 3 is located at the uppermost portion of the bottom plate 31, and the supporting table 34 is used to support the light source 36', and each of the light sources 36 is not in contact with the reflector 37, respectively. The light source of the backlight module 3 can be a fluorescent tube: the complex reflector 37 is disposed between the bottom plate 31 and the light source 36 for reflecting the light of the sauce tube. The backlight module is 3 出. The bottom plate 31 has a plurality of heat dissipation slots 32, and the heat dissipation slots 32 extend through the bottom plate 31, and each slot 32 is flat with each other.
1303340 五、發明說明(5) 行’而複數光源3 6與散熱槽孔3 2平行設置。 在本實施例中,散熱槽孔3 2之形狀是細長形的,但並 不限於此,散熱槽孔32也可視情況而改變其形狀,因此, 不一定是如第3圖所示之長條形槽孔,也可以是分開的複 數個沿著光源3 6排成一列的孔洞。 若將上述元件全部組合之後,如第4圖所示,每一散 熱槽孔3 2係位於相鄰的反射器3 7之間。光源3 6所產生之熱 量可經由散熱槽孔32而逸散,如此便可在整個背光模組3〇 内形成了一開放空間,藉由此一較大的散熱面積係可有效 地增加熱對流,使得背光模組之熱量傳導出去,如此以達 到高亮度之需求。 除此之外,於底板3 1之内側,於散熱槽孔3 2處係可增 $又一過濾網(f i 1 ΐ e r ),應注意的是,為了突顯本發明之槽 孔32,圖中未顯示過濾網,如此以防止且過濾灰塵或其它 異物t由散熱槽孔3 2進入背光模組3 〇之中。過濾網的設置 不會影響散熱效果。另外,散熱槽孔32之規格可依照異物 之不同大小而改變。 六如第5圖所示,基於習知液晶顯示器之正面亮度通常 車乂為=足的炀況下,增設本發明之反射器U可確實增加正 向之冗度。反射益3 7係設置於各長條形光源3 6之正下方, $散熱槽孔3 2平行設置,每一反射器37具有一反射曲面 支撐部3 72。由第4圖可清楚看出,反射曲面37係 ϊ Si 3 72所支# ’反射曲面37主要是用來加強反射 “、之、’線至光擴散板33,除了可增強顯示器之正面亮1303340 V. DESCRIPTION OF THE INVENTION (5) Row ' and a plurality of light sources 36 are disposed in parallel with the heat sink slots 3 2 . In the present embodiment, the shape of the heat dissipation slot 32 is elongated, but is not limited thereto, and the heat dissipation slot 32 may be changed in shape as the case may be. Therefore, it is not necessarily the long strip as shown in FIG. The slotted holes may also be a plurality of separate holes arranged in a row along the light source 36. After all of the above elements are combined, as shown in Fig. 4, each of the heat dissipation slots 32 is located between adjacent reflectors 37. The heat generated by the light source 36 can be dissipated through the heat dissipation slot 32, so that an open space can be formed in the entire backlight module 3, whereby a large heat dissipation area can effectively increase the heat convection. The heat of the backlight module is conducted out, so as to achieve high brightness. In addition, on the inner side of the bottom plate 31, a further filter (fi 1 er er) can be added to the heat sink slot 32. It should be noted that in order to highlight the slot 32 of the present invention, The filter is not shown, so as to prevent and filter dust or other foreign matter t from entering the backlight module 3 through the heat dissipation slot 32. The filter settings do not affect the cooling effect. Further, the specifications of the heat dissipation slots 32 may vary depending on the size of the foreign matter. As shown in Fig. 5, the addition of the reflector U of the present invention can surely increase the redundancy of the forward direction based on the fact that the front side brightness of the conventional liquid crystal display is usually =. The reflection benefit 3 7 is disposed directly under each of the elongated light sources 36, and the heat dissipation slots 3 2 are disposed in parallel, and each of the reflectors 37 has a reflective curved surface supporting portion 3 72. As is clear from Fig. 4, the reflective curved surface 37 is a reflection of the Si 3 72. The reflective surface 37 is mainly used to enhance the reflection of the "," line to the light diffusing plate 33, in addition to enhancing the front light of the display.
13033401303340
度’更可降低模組厚度 外,於底板31内侧面上 光輝度。 °於本發明中除了設置反射器3 7之 更可另增加一反射層38,更提高發 此外,如圖所示,在每 區域範圍内更具有至少一穿 孔35中而連結於底板31上。 雖然圖上是顯示長條型的, 化例中,雖然圖上未顯示, 成型之結構。 一反射器3 7的對應之底板3 1的 孔35,支撐部3 72係嵌合於穿 本發明不限定穿孔35之形狀, 也可以是其他形狀。在另一變 反射器37可以與底板31為一體 士如第5圖所示,光擴散板33與長條形光源%之間具 έΛ弟无疋距離Η,反射曲面之曲率係由長條形光源之 二' 距離及第一既定距離Η而決定。在藉由電腦對於不 ^之距離Η及距離D的模擬下是可以得到反射曲面之最佳曲 =二因此,反射器37之反射曲面可增加光源正向利用率, 、:之,可增強正向之亮度,以達到均勻之輝度及 之表現。 應注意的是,本發明之反射器3 7之材質係不同於其他 反射層、,反射器37係由特別塑膠材質所製成,此塑膠之光 反射率為9 5%以上,由於此塑膠係電絕緣材料,可有效降 低金屬件之月光模組3 〇所造成之燈管3 6漏電流,使燈管3 6 發光效率更為提高。 如上所述’藉此本發明可以有效地利用散熱槽孔3 2之 形成來促使熱對流,可讓燈管36在最佳的工作溫度下操 作’而使背光模組3 〇產生的輝度最佳化。In addition, the degree of brightness of the module is reduced on the inner side of the bottom plate 31. In the present invention, in addition to providing the reflector 37, a reflective layer 38 may be additionally added, and the hair is further increased. Further, as shown in the drawing, at least one of the through holes 35 is connected to the bottom plate 31 in each region. Although the figure shows a long strip type, in the example, although the figure is not shown, the formed structure. The hole 35 of the corresponding bottom plate 3 1 of the reflector 3 7 and the support portion 3 72 are fitted to the shape of the present invention which does not define the through hole 35, and may have other shapes. In another variable reflector 37, it can be integrated with the bottom plate 31. As shown in Fig. 5, the distance between the light diffusing plate 33 and the elongated light source is έΛ, and the curvature of the reflective surface is elongated. The distance between the light source and the first predetermined distance is determined. In the simulation of the distance Η and the distance D by the computer, the best curvature of the reflective surface can be obtained. Therefore, the reflective surface of the reflector 37 can increase the forward utilization of the light source, and Brightness to achieve uniform brightness and performance. It should be noted that the material of the reflector 37 of the present invention is different from other reflective layers, and the reflector 37 is made of a special plastic material, and the light reflectance of the plastic is more than 95%, due to the plastic system. The electric insulating material can effectively reduce the leakage current of the lamp tube 36 caused by the moonlight module 3 of the metal member, so that the luminous efficiency of the lamp tube 3 6 is further improved. As described above, the present invention can effectively utilize the formation of the heat dissipation slot 32 to promote thermal convection, allowing the lamp 36 to operate at an optimum operating temperature to optimize the brightness of the backlight module 3 〇. Chemical.
1303340 五、發明說明(7) 綜上所述,藉由本發明之背光模組30中之散熱槽孔32 可增加散熱面積,有效地提高液晶顯示器之輝度。另一優 點是藉由上述反射器3 7可降低燈管之漏電流以增加燈管之 發光效率。 雖然本發明已以較佳實施例揭露如上,然其並非用以 限定本發明,任何熟習此技藝者,在不脫離本發明之精神 和範圍内,當可作些許之更動與潤飾,因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。1303340 V. Inventive Description (7) In summary, the heat dissipation slot 32 in the backlight module 30 of the present invention can increase the heat dissipation area and effectively improve the brightness of the liquid crystal display. Another advantage is that the leakage current of the lamp can be reduced by the reflector 37 to increase the luminous efficiency of the lamp. While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
0632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd 第11頁 1303340 圖式簡單說明 第1圖係為日本專利特開2 0 0 1 - 2 9 7 6 2 3號中之背光模組 之示意圈; 第2圖係為本發明之液晶顯示器示意圖; 第3圖係為本發明之背光模組之分解示意圖; 第4圖係為本發明之背光模組之組合示意圖;以及 第5圖係為第4圖中沿著AA’剖面線之背光模組剖面 圖。 【符號說明】 I 0〜背光模組; 11〜反射板; II 1〜底板; 11 2〜侧板; 1 2〜光擴散板; 13〜燈管; 1 4〜支持台; 1 5〜集光板; 2 3〜開口; 1〜液晶顯不裔, 3〜殼體; 4〜液晶面板, 3 0〜背光模組; 3 1〜底板; 32〜散熱槽孔;0632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd Page 11 1303340 Brief Description of the Drawings Fig. 1 is a schematic circle of a backlight module in Japanese Patent Laid-Open No. 2 0 0 1 - 2 9 7 6 2 3; 2 is a schematic view of a liquid crystal display of the present invention; FIG. 3 is an exploded view of the backlight module of the present invention; FIG. 4 is a schematic view of a combination of the backlight module of the present invention; and FIG. 5 is a fourth A cross-sectional view of the backlight module along the AA' section line in the figure. [Description of symbols] I 0 ~ backlight module; 11 ~ reflector; II 1 ~ bottom plate; 11 2 ~ side plate; 1 2 ~ light diffuser; 13 ~ lamp; 1 4 ~ support table; 1 5 ~ collector plate ; 2 3 ~ opening; 1 ~ LCD display, 3 ~ shell; 4 ~ LCD panel, 3 0 ~ backlight module; 3 1 ~ backplane; 32 ~ heat sink slot;
0632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd 第12頁 13033400632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd Page 12 1303340
0632-A50040TWf(Nl) ; AU0308012 ; vuchia.ptd 第13頁0632-A50040TWf(Nl) ; AU0308012 ; vuchia.ptd第13页
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TW92137616A TWI303340B (en) | 2003-12-31 | 2003-12-31 | Liquid crystal display and back light module thereof |
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TW92137616A TWI303340B (en) | 2003-12-31 | 2003-12-31 | Liquid crystal display and back light module thereof |
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