591189591189
五 '發明說明（1) 本發明乃關於使用於液晶顯示裝置之背光裝置。 現在電視機或超大型監視器等用途，已漸漸採用大，丨 液晶顯示裝置，而此裝置所需之背光裝置，被要求有廣$ 之视野角度（視界），高亮度且輕量化。為達成此要求，、— 般使用所謂之正背面式（正下面式）背光裝置。 此種正下面（即背面）式背光裝置之構造特徵為，其發 光面（擴散面）之正下面設有線狀光源，由線狀光源射出之 光形成由反射率高之層面形成之反射板反射出之光與直接 光之合成光’而自發光面（擴散面）照射出來。為有效率獲 得充分之上述反射光，線狀光源與反射板間設有所定之間 隙。 隨著近年來配合大型顯示器之需要，背光裝置之大型 化’要求線狀光源之延長，然而，線狀光源一延長至一定 程度，將因線狀光源本身重量而致彎曲，無法保持一直 線’致使線狀光源與反射板之間之間隔不均一，因此，無 法獲得全面均勻之反射光，造成顯示器之顯示品質不佳。 為此，日本特開平1 1-329 040號公開公報揭示一種將 光源之兩端固定保持之燈管支持座，但是，如將此種燈管 支持座為防止線狀光源彎曲而設於線狀光源之軸向中間部 最易彎曲處時，燈管支持座之影子會產生而映於背光發光 面’以致發生對顯示品質有不良影響之問題。 ^本發明之目的在提供一種背光裝置，不僅可避免設置 燈管支持座所帶來之不良影響，且可有效防止線狀光源之 f曲’致影響反射光之均勻者。5. Description of the invention (1) The present invention relates to a backlight device used in a liquid crystal display device. Nowadays, TVs or super-large monitors have gradually adopted large and liquid crystal display devices, and the backlight device required for this device is required to have a wide viewing angle (field of view), high brightness and light weight. To achieve this, a so-called front-back type (front-side type) backlight device is generally used. The structure characteristics of such a direct-below (ie, back-side) type backlight device are that a linear light source is provided directly under the light-emitting surface (diffusive surface), and light emitted by the linear light source is formed to be reflected by a reflecting plate formed by a layer having a high reflectance The combined light of the outgoing light and the direct light is emitted from the light emitting surface (diffusing surface). In order to efficiently obtain the above-mentioned reflected light, a predetermined gap is provided between the linear light source and the reflecting plate. With the needs of large-scale displays in recent years, the enlargement of backlight devices requires the extension of linear light sources. However, once the linear light source is extended to a certain extent, it will be bent due to the weight of the linear light source and cannot be maintained in a straight line. The spacing between the linear light source and the reflecting plate is not uniform, so it is impossible to obtain a comprehensive and uniform reflected light, which causes the display quality of the display to be poor. For this reason, Japanese Patent Application Laid-Open No. 1 1-329 040 discloses a lamp tube holder that fixes and holds both ends of a light source. However, if such a lamp tube holder is provided in a linear shape to prevent the linear light source from bending When the axial middle part of the light source is most easily bent, the shadow of the lamp support base will be generated and reflected on the backlight light emitting surface, so that a problem that adversely affects the display quality occurs. ^ The object of the present invention is to provide a backlight device, which can not only avoid the adverse effects caused by the lamp tube support, but also effectively prevent the f-shape of the linear light source from affecting the uniformity of the reflected light.
第4頁 591189 五、發明說明（2) 為達成上述目的， 發明提供一種具有多數 之反射板之背光裝置， 設有沿線狀光源之長度 此等間隔墊片係在相鄰 設置。 依本發明，可藉間 由於相鄰接光源間之各 有間隔墊片，其影子分 本發明採取下列技術手段，即，本 2線狀光源’及將該光源之光反射 其特徵為’上述光源與反射板之間 方向保持其間隔一定之間隔墊片， 接光源之間以軸向位置互相錯開狀 隔塾片防止線狀光源彎曲，同時， 1固間隔墊片之位置互相錯開，即使 政而不顯著，對顯示品質之不良影 響殆無。 相鄰接之線狀光源之間隔若設為p，而間隔塾片之轴 P之關係最好設為· p之逆數成比 是能保持線狀光源與反射板之間隔 向 錯 開 量 設 為 L時， 例 〇 上 述 間 隔 墊片 在 ‘ 2釐 米 (mm)之 又 ， 上 述 間隔 上 述 線 狀 光源 個 線 狀 光 源 〇在 dL必ί择之數支® g 線狀^ Ϊ狀光源之數支燈管 實施例之 茲配 之材質最好採用透明或白色材質。 採用由二支以上之燈管為一組構成 形下，上述間隔墊片可為能將構成 別保持之構成，也可為將構成一個 起（一體）保持之構造。 説明： 合附圖就本發 下 及圖二中 於圖 明背光裝置之實施例詳細說明如 为光裝置為具有一上方開口之盒子Page 4 591189 V. Description of the invention (2) In order to achieve the above object, the invention provides a backlight device having a plurality of reflecting plates, which is provided along the length of the linear light source. These spacers are arranged adjacently. According to the present invention, since there are spacers between adjacent light sources, the shadow of the present invention adopts the following technical means, that is, the 2 linear light sources' and the light reflected by the light sources are characterized by the above The light source and the reflective plate are kept at a certain distance between the spacers, and the light sources are staggered from each other in the axial position to prevent the linear light source from bending. At the same time, the positions of the solid spacers are staggered from each other, It is not significant and has no adverse effect on display quality. If the interval between adjacent linear light sources is set to p, and the relationship between the axis P of the spacer cymbals is preferably set to be proportional to the inverse of p, the distance between the linear light source and the reflecting plate can be kept to be set as At the time of L, for example, the above spacers are at 2 cm (mm), the above mentioned linear light sources are spaced from each other, and the linear light sources must be selected in dL® g. The material for the tube embodiment is preferably a transparent or white material. Adopting a structure composed of two or more lamps, the above-mentioned spacer can be a structure that can hold the structure separately, or a structure that can (one) hold the structure. Description: Detailed description of the embodiment of the backlight device is shown in the following with reference to the drawings and in Figure 2. If the light device is a box with an upper opening
第5頁 591189 五、發明說明（3) · 1，此盒子1之内面設有反射板2，多數個線狀光源3與反射 板2保持所定之間隔互為平行配置在盒子1内，光擴散板4 係設在盒子1上將其開口蓋住，而液晶顯示裝置（圖示省 略）則配置在此擴散板4之上面。 上述線狀光源3在此實施例中，係由二支燈管5構成， 此燈管5可採用冷陰極螢光燈管或熱陰極螢光燈管，特別 是冷陰極螢光燈管為佳。當然，構成一個線狀光源3之燈 管5支數，並不限於二支，由二支或更多支之燈管或燈光 所構成者亦可用。如為三支以上時，則應採用均等分配置 (即等間隔配置）為宜。又，線狀光源3也可僅由單支燈管5 構成，自不待言。 燈管5因一般具有長度數百釐米（數十公分）而管徑僅 約3釐米（mm)之細管狀體，形成特別容易彎曲之構造。燈 管5之軸向兩端設有電極（圖示省略），此等電極之存在， 燈管之軸向兩端部形成較燈管之軸向中間部之亮度低之非 有效發光區域。此非有效發光區域一般為在燈管轴向兩端 各約1 0釐米之範圍，除了此非有效發光區域外之軸向中間 部份則為亮度高之有效發光區域。又，燈管5之軸向兩端 部係支持在盒子1内之兩端。 當採用多支燈管5以構成各線狀光源3之情形時，各燈 管5應採用光學特性相同之燈管。例如，向來如採用單支 燈管做為線狀光源時燈管之電流為6mA時，在本實施例中 如採用二支燈管5構成線狀光源3時，燈管電流應為3mA。 構成一個線狀光源3之多數支燈管5，最好形成互相接Page 5 591189 V. Description of the invention (3) · 1. The inner surface of the box 1 is provided with a reflecting plate 2. Most of the linear light sources 3 and the reflecting plate 2 are arranged in the box 1 in parallel with each other at a predetermined interval, and the light is diffused. The plate 4 is arranged on the box 1 to cover its opening, and a liquid crystal display device (not shown) is arranged on the diffuser plate 4. In this embodiment, the linear light source 3 is composed of two lamp tubes 5, and the lamp tube 5 may be a cold cathode fluorescent lamp or a hot cathode fluorescent lamp, especially a cold cathode fluorescent lamp. . Of course, the number of the five tubes constituting one linear light source 3 is not limited to two, and one composed of two or more tubes or lights may also be used. If there are more than three branches, it should be used in equal division configuration (that is, equal interval configuration). It is needless to say that the linear light source 3 may be composed of only a single lamp tube 5. The lamp tube 5 generally has a thin tubular body having a length of several hundred centimeters (tens of centimeters) and a tube diameter of only about 3 centimeters (mm), forming a structure that is particularly easy to bend. The axial ends of the lamp tube 5 are provided with electrodes (not shown). With the existence of these electrodes, the axial ends of the lamp tube form a non-effective light emitting region having a lower brightness than the axial middle portion of the lamp tube. This ineffective light emitting area is generally in the range of about 10 cm at each end of the lamp tube in the axial direction, and the axial middle part except the ineffective light emitting area is an effective light emitting area with high brightness. The axial ends of the lamp tube 5 are supported at both ends in the box 1. When a plurality of lamp tubes 5 are used to form each linear light source 3, each lamp tube 5 should be a lamp tube having the same optical characteristics. For example, if a single lamp is used as a linear light source when the lamp current is 6 mA, in this embodiment, if two lamp 5 is used to form the linear light source 3, the lamp current should be 3 mA. The plurality of lamp tubes 5 constituting a linear light source 3 are preferably connected to each other.
第6頁 591189 五、發明說明（4) 近配置成群（束），具體言之，最好收容於15釐 之寬度内，各燈管5相互間之間隔雖愈小愈好， 互接觸。為避免燈管5間互相接觸，可置入〇型 (圖不省略）。 線狀光源3間之距離最好為丨5〜5 〇釐米，女 米以上時，容易出現亮度不均。 線狀光源3與擴散板4之距離最好為4 0釐米 板4可採用在亞克力等透明樹脂中配合光擴散把 材料製成板狀者。 ' 上述反射板2只要具有高反射率者並不特另! 材質’表層由樹脂層或金屬層之反射面覆蓋。 好是白色。為高效率的獲得反射光，線狀光源 間具有1〜2釐米之間隙。 為了防止上述線狀光源3因本身長度與重^ 而弯曲所導致上述間隔順著線狀光源3之長度戈 不均’在線狀光源3與反射板2之間設有間隔塾 此間隔墊片6之顏色或材質並無特別限制， 透明或白色之亞克力等樹脂、玻璃、矽膠等。 採用透明或白色可防止或消除間隔墊片6之陰景 間隔墊片6之形狀，如圖三至五所示，採用外开 形、四角形、三角形等在中間穿設有燈管插入/ 件0 將燈管5插入上述間隔墊片6之燈管插人& 於反射板2上面，即可將各燈管5與反射板2之fe 米（mm)以内 但不宜相 環等間隔物 3距離5 0釐 以下，擴散 t微粒子之 J限於何種 反射板2最 3與反射板2 t之關係等 r向（軸向） 片6° 一般採用 間隔墊片6 冬發生。此 多形成圓 孔7之構 7内後放置 3之間隔個Page 6 591189 V. Description of the invention (4) Nearly arranged in groups (bundles), specifically, it is best to be accommodated within a width of 15%. Although the distance between the lamps 5 is as small as possible, they contact each other. In order to avoid the lamp tubes 5 from contacting each other, an O-shape can be inserted (not shown). The distance between the linear light sources 3 is preferably 5 to 50 cm. When the height is more than a female meter, uneven brightness is likely to occur. The distance between the linear light source 3 and the diffusion plate 4 is preferably 40 cm. The plate 4 can be made into a plate shape by using a transparent resin such as acrylic in combination with light diffusion. 'The above-mentioned reflecting plate 2 is not particularly limited as long as it has a high reflectance! Material' The surface layer is covered by a reflective layer of a resin layer or a metal layer. It's white. In order to obtain reflected light efficiently, a gap of 1 to 2 cm is provided between the linear light sources. In order to prevent the above-mentioned linear light source 3 from being bent due to its length and weight, the above-mentioned interval is uneven along the length of the linear light source 3, and a gap is provided between the linear light source 3 and the reflection plate 2. This spacer 6 There is no particular limitation on the color or material, transparent or white acrylic resin, glass, silicone, etc. Use transparent or white to prevent or eliminate the shape of the spacer spacer 6 of the spacer spacer 6, as shown in Figures 3-5. Use open, quadrangular, triangular, etc. to insert a lamp tube in the middle / pieces 0 Insert the lamp tube 5 into the lamp tube of the spacer 6 above and insert it on the reflecting plate 2. You can place each lamp tube 5 within 3 feet (fe) of the reflecting plate 2 but should not be spaced apart by a distance of 3 spacers. Below 50 centimeters, the J of the diffused t particles is limited to the relationship between the reflection plate 2 and the reflection plate 2 t, such as the r-direction (axial) sheet 6 °. Generally, a spacer 6 is used to occur in winter. This often forms a structure of round holes 7 and places 3 spacers inside
五、發明說明（5) 別保持一定0又 U X · 射板2之間隔彳早姓— 塾片6形成能將線狀光源3與反 插入燈管5之間隔塾片： 乾圍内且前後-定。 摩擦力而可定仇於燈典站/精燈管插入孔7與燈管5表面之 片6施予燈管輛向之^ ^ 向任意位置上’唯只要對間隔墊 後任意移動，田\ M ’即可使間隔塾片6沿燈管軸向前 易的變更。 雙片6之位置，視必要可隨時容 間塾片6可設於燈管5 域内，而却^ 轴向中段途中之有效發光區 -円 而叹於軸向中段部則可右4ν吟势緣从 一 φ 、』>> 有效防止燈官彎曲。又，圖 ::，間^墊片6係對於每支燈管5設置兩㈣，如有必要設 置二個亦可，又僅設置一個亦無不可。 如圖二所示，線狀光源3如係由多支燈管5構成時，間 隔塾片6能使每一線狀光源3中之各燈管5間保持一間隔， 而使各燈管5不接觸。換言之，此間隔墊片6不僅為保持燈 管5與反射板2間之間隔，也是保持構成線狀光源3之多支 燈管互不接觸之燈管間間隔物。因此，不必另設置為保持 燈管5之間免予互相接觸之前述習用〇型環等間隔構件。 圖六至八所示者為將線狀光源3之多支燈管5—體（一 起）保持之間隔墊片6，又圖九所示f為能將間隔墊片6從 燈管5徑向嵌入之間隔墊片6，其燈官插入孔7設有缺口部 8，可利用此缺口部8嵌入燈管5。圖九所示之間隔墊片6， 燈管插入孔7如只設〆個亦可行。又，圖二至圖九所示之 間隔墊片6或其他形狀之間隔墊片，必要時，也可一體設 在反射板2上。 591189 五、發明說明（7) 又，依本發明在同一輸出電流下，因比傳統裝置使用 較多之燈管5，為達成所要求之亮度施加予各支燈管所必 要之負荷較傳統裝置小，具體而言，流入燈管5之管電流 幸交小之故，燈管之壽命可延長。 換言之，流入燈管一支所必要之管電流只要傳統裝置 之一半以下，而基本上，超過放電安定電壓之安定雰圍狀 態下，流入燈管5之管電流值愈小，燈管之壽命愈長，因 此，依本實施例，可達成延長使用壽命之目的。 又，因將構成線狀光源之燈管由多支構成，而採用直 徑細小之燈管，但直徑小則燈管容易因其本身重量而容易 彎曲，唯可藉間隔墊片之設置而避免其彎曲。 又，本發明裝置並不侷限於前述各實施例之說明。 依本發明之構成，因將沿線狀光源長度方向設置而用 以保持光源與反射板間之間隔於一定之間隔墊片，在相鄰 之光源間呈轴向位置互相錯開狀設置，故較傳統之背光裝 置，可有效防止間隔墊片所造成顯示品質之低下。復因如 採用二支以上之燈管成一組以構成一線狀光源時，更不易 發生經時變化所導致亮度不均之問題，同時也可延長燈管 之使用壽命。V. Description of the invention (5) Don't keep a certain 0 and UX · The interval of the radiating plate 2 彳 Early surname — The cymbal 6 forms the interval cymbal which can insert the linear light source 3 and the anti-insertion tube 5: Inside the trunk and before and after- set. The friction force can be settled on the lamp code station / fine lamp insertion hole 7 and the sheet 6 on the surface of the lamp 5 to the lamp car ^ ^ to any position 'only as long as the spacer is arbitrarily moved, Tian \ M 'makes the spacer cymbal 6 easy to change forward along the axis of the lamp tube. The position of the double sheet 6 can be accommodated at any time if necessary. The cymbal 6 can be located in the field of the lamp tube 5 but the effective light-emitting area in the middle of the axial direction-円 and sighing the axial middle section can be right 4ν From one φ, ">", the lamp official is effectively prevented from bending. Also, as shown in Figure ::, the spacer 6 is provided with two cymbals for each lamp tube 5, if necessary, two can be set, and only one is not necessary. As shown in FIG. 2, when the linear light source 3 is composed of a plurality of tubes 5, the spacer cymbal 6 can maintain a space between the tubes 5 in each linear light source 3, so that the tubes 5 are not contact. In other words, the spacer 6 is not only for maintaining the space between the lamp tube 5 and the reflecting plate 2, but also as a spacer between the lamp tubes that keeps the plurality of lamp tubes constituting the linear light source 3 from contacting each other. Therefore, it is not necessary to provide another spacer member such as the aforementioned conventional O-ring to keep the lamps 5 from contacting each other. Figures 6 to 8 show the spacers 6 that hold the multiple lamp tubes 5 of the linear light source 3 as a body (together), and Figure 9 shows f that the spacers 6 can be radial from the lamp 5 The lamp spacer insertion hole 7 of the embedded spacer 6 is provided with a notch portion 8. The notch portion 8 can be used to embed the lamp tube 5. The spacer 6 shown in FIG. 9 and the lamp tube insertion hole 7 may be provided. Further, the spacers 6 shown in Figs. 2 to 9 or spacers of other shapes may be integrally provided on the reflecting plate 2 when necessary. 591189 V. Description of the invention (7) In addition, according to the present invention, under the same output current, because more lamps 5 are used than traditional devices, the load necessary to apply the required brightness to each lamp to achieve the required brightness is higher than that of traditional devices. It is small, specifically, because the tube current flowing into the lamp 5 is small, the life of the lamp can be extended. In other words, the necessary tube current flowing into a lamp tube is only one and a half of the traditional devices, and basically, in a stable atmosphere state that exceeds the discharge stable voltage, the smaller the tube current value flowing into the lamp tube 5, the longer the lamp life. Therefore, according to this embodiment, the purpose of extending the service life can be achieved. In addition, because the lamp tube constituting the linear light source is composed of a plurality of tubes, a lamp tube with a small diameter is adopted, but the lamp tube is easily bent due to its own weight if the diameter is small. However, the spacer can be used to avoid it. bending. In addition, the apparatus of the present invention is not limited to the description of the foregoing embodiments. According to the structure of the present invention, since the spacer is arranged along the length direction of the linear light source to keep the distance between the light source and the reflective plate at a certain interval, and the axial positions of the adjacent light sources are staggered from each other, it is more traditional. The backlight device can effectively prevent the display quality from being deteriorated by the spacers. For example, if two or more lamps are used as a group to form a linear light source, the problem of uneven brightness caused by changes over time is less likely to occur, and the service life of the lamps can be extended.
第10頁 591189 圖式簡單說明 圖一表示本發明一實施例之剖視圖。 圖二為圖一之平面圖。 圖三為用以個別支持燈管之圓形間隔墊片之正視圖。 圖四為用以個別支持燈管之四角形間隔墊片之正視 圖。 圖五為用以個別支持燈管之三角形間隔墊片之正視 圖。 圖六為用以將二支燈管一起支持之間隔墊片之正視 圖。 圖七為用以將三支燈管呈一排一起支持之間隔墊片之 正視圖。 圖八為用以將三支燈管呈三角形配置一起支持之間隔 墊片之正視圖。 圖九為用以將二支燈管呈能自徑向嵌裝支持之間隔墊 片之正視圖。 圖十表示將間隔墊片以正弦波狀配置之模式圖。 元件符號說明： 1 盒子 2 反射板 3 線狀光源 4 擴散板 5 燈管 6 間隔墊 P 光源之間隔 L 錯開量Page 10 591189 Brief Description of Drawings Figure 1 shows a sectional view of an embodiment of the present invention. Figure 2 is a plan view of Figure 1. Figure 3 is a front view of a circular spacer used to individually support a lamp. Figure 4 is a front view of a quadrangular spacer used to individually support the lamp. Figure 5 is a front view of a triangular spacer used to individually support the lamp. Figure 6 is a front view of a spacer used to support two lamps together. Figure 7 is a front view of a spacer used to support three lamps together in a row. Figure 8 is a front view of a spacer used to support three lamps in a triangular configuration. Figure 9 is a front view of the spacers used to present the two lamps in a radial direction. FIG. 10 is a schematic diagram showing the spacers arranged in a sine wave shape. Description of component symbols: 1 box 2 reflector plate 3 linear light source 4 diffuser plate 5 lamp tube 6 spacer P light source interval L staggered amount