TW200403502A - Surface light source device, image display device and light guide plate assembly - Google Patents
Surface light source device, image display device and light guide plate assembly Download PDFInfo
- Publication number
- TW200403502A TW200403502A TW092119377A TW92119377A TW200403502A TW 200403502 A TW200403502 A TW 200403502A TW 092119377 A TW092119377 A TW 092119377A TW 92119377 A TW92119377 A TW 92119377A TW 200403502 A TW200403502 A TW 200403502A
- Authority
- TW
- Taiwan
- Prior art keywords
- light
- guide plate
- light guide
- light source
- source device
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
200403502 玖、發明說明： 【發明所屬之技術領域】 本發明是關於用來作為對於液晶彩色電視或液 器等液晶顯示面板（被照明構件 _ : 瓜 囉_ 進仃面狀照明之背光等的 面光源裝置，以及具有此面光200403502 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a surface for a liquid crystal display panel such as a liquid crystal color television or a liquid container Light source device, and having the surface light
尤/原裝置的圖像顯示裝置，而 且是關於這歧面光源裝置及R 組裝體。圖像顯示裝置所使用的導光板 【先前技術] (第1習知例） 動性T于料話或攜帶型液晶彩色電視等由於要求可移 此疋使用小型化的圖像顯示裝置。另一方 型液晶彩色電視或各種液晶監視 方面，大 以帶著走Λ二担〜 。。寺的圖像頭示裝置並不 走為刖獒。弟16圖是此型式 例。如該罔邮- 主式之圖像頻不裝置的第i 〆圖所不’面光源裝置5 4呈 面（圖式中下；w , τ —有擴放板50，在其背 (㈡ ' 中下面）側平行配置有 51的光是狁嫉私4 複数個玄先燈51，該螢光燈 尤疋攸擴政板5〇的出射面52 可照明液晶顯干面如^ 面狀射出。此出射光麵 ”肩不面板寺的被照明構件53。 但是’這種構造有苴 光的均—化，因士、/ p ’由於需要謀求出射 m i-x r w^r '必須增加營光燈51到擴散板5〇的距離， ::置的厚度(T1)會變大， 例如在室内笨耠士 Ρ 里€曰艾垔。因此， 便。 錢有限的空間内也不容易搬運，相當不方 (弟2習知例）It is especially an image display device of the original device, and it is also about the multi-plane light source device and the R assembly. Light guide plate used in image display device [Prior art] (First conventional example) Mobility T or portable LCD color TVs can be moved as required. Therefore, a compact image display device is used. On the other side of LCD color TVs or various LCD monitors, they can carry Λ Erdan ~. . Temple's image display device is not a problem. Figure 16 is an example of this type. As shown in the i-th image of this post-main type video device, the 'surface light source device 5 4 is a plane (bottom in the figure; w, τ — there is an expansion plate 50 on its back (㈡' The light with the 51 arranged in parallel on the side is a pair of mysterious lamps 51, and the fluorescent lamp 52 is particularly suitable for the exit surface 52 of the expansion board 50, which can illuminate the liquid crystal display surface as a plane. This exit light surface "shoulders the illuminated member 53 of the panel temple. However, 'this structure has a homogenization of the light, Yin Shi, / p' Because of the need to seek the exit mix ix rw ^ r ', a camp light 51 must be added The distance to the diffuser 50, the thickness (T1) of the :: set will become larger, for example, in the indoor stupid house P. It is convenient. It is not easy to carry in the space with limited money, which is quite inconvenient. (Brother 2 learning example)
另夕卜’弟夺士 ΤΤ I V 乂之圖像顯示裝置所使用的面光源裝置已 314883 5 200403502 ，知有第1 7圖所示的面光源裝置5 6。此面光源裝置5 6是在 導光板5 7之相互位於相反側的兩側面（兩入射面）8 a、8b 附近分別配置複數個螢光燈1 0，並且將來自這些複數個费 光燈10的光從兩入射面8a、8b導入導光板57内。此光在 導光板5 7内傳播的過程當中會從出射面5 8以面狀射出° 此構造當中，裝置的厚度（T2)比第1習知例之裝置的 厚度（丁1)小（ΤΙ > Τ2)。因此，使用面光源裝置56的圖像顯 _ 示裝置60比使用第1習知例之面光源裝置54的圖像顯系 裝置5 5更適合小型化（薄型化）、輕量化，搬運也比第1習 知例輕鬆。 (第3習知例） 第1 8圖是較大型之圖像顯示裝置所適用的另一個習 知例。如該圖所示，面光源裝置6 1與前述第2習知例同槔 是在導光板62的兩側面（兩入射面）8a、8b附近分別配f旅 數個金光燈1 〇。但是，在導光板6 2的剖面形狀下過工夫。 也就疋以板厚在導光板62之背面63側的大致中央部形成 、勺方式，使板厚從兩入射面8 a、8 b向大致中央部逐漸 5 6 口此，面光源裝置6 1比第2習知例的面光源裝置 56更谷易射出在導光板62内部傳播的光。 光直=果比起第2習知例的面光源裝置56更可提高出射 噸示脖亦即，使用此第3習知例之面光源裝置6 1的圖像 =裝置64比第1習知例更容易實現小型化（薄型化）、輕 r &而且，比第2習知例更可謀求出射光的高亮度化。 314883 6 200403502 (發明之目的） ' . 如上所述，第2習知例及第3習知例比第1習知例更 合易實現小型化（薄型化），但還是無法充分因應近年來對 於消耗電力降低化的強烈需求。 因此，本發明之目的在於提供一種可避免出射光亮产 P条你 一T- -’又可謀求消耗電力之降低化的面光源裝置、使用該 面光源裝置的圖像顯示裝置，以及這些裝置所使用的導光 板組裝體（組合體）。 · (解決問題之技術手段） 本發明的面光源裝置具有第1導光板及第2導光板。 在此’第1導光板具有相互位於相反側的兩側面（入射面）， 且在各側面（入射面）附近分別配置有第1光源及第2光 源。來自這些第丨及第2光源的光在通過前述兩側面而被 ^入‘光板内之後，會從出射面以面狀的照明光射出。 而且，在第1導光板的背面收容有導光板卡合凹處， 且在該處收容有第2導光板。另外，在第2導光板的背面# 形成有光源收容凹處，且在該處收容有第3光源。 而且，藉由組合上述面光源裝置以及由該面光源裝置 所照明的被照明構件，即構成本發明的圖像顯示裝置。 另外，亦可將在上述第1導光板之背面的導光板卡合 凹處收容有前述第2導光板者用來作為上述面光源裝置或 圖像顯不裝置所使用的導光板組裝體（組合體）。 【貫施方式】 以下，蒼照圖式來詳細說明本發明的實施形態。 31488 7 2〇〇4〇35〇2 [第1實施形態] 乐1圖至第5圖是本發明第i實施形態的圖像顯示裝 ^ 1 °百先第1圖是圖像顯示裝置丨的分解斜視圖。另外， 弟2圖是第i圖之圖像顯示裝置工所使用的面光源襄置2 :外觀斜視圖。第3圖是第i圖的圖像顯示裝^ i的前視 圖。另外，第4圖是從第3圖的A方向觀看面光源裝置9 的圖。而第5圖是去除第3圖所示之面光源裝置2的反射 片3後的面光源裝置2的後視圖（從第3圖的b方向觀看的 圖）。 (圖像顯示裝置的概略構成）# 在這些圖式當中，將第2導光板6重疊配置於第夏導 光板4的背面5側’藉此構成導光板組裝體7。第丄導光 板4具有相互位於相反側的一對側面（入射面、讣。而 且，在側面（入射面）8a附近配置有作為第丨光源的棒狀螢 光燈，在側面(入射面)8b附近配置有作為第2光源的棒狀 螢光燈。這些最好是相同尺寸，形狀、相同型式的螢 光燈’兩者皆以符號1 〇表示。 另外，在第2導光板6之背面"側(第i圖中的下面 側)的中央部有作為第3光源的棒狀螢光燈12配置成大致 與螢光燈1 0、1 〇平行的狀態。 以相對向於第1導光板4之出射面（笫 ⑴叫、乐1圖中的上面）13 的方式，重疊配置有液晶顯示面板14以作為被照明構件， 並且以相對向於第2導光板6之背面丨丨 力式配置有反射 片3。此外’在上述第i導光板4與液晶顯示面板μ之間 314883 8 200403502 亦可看情況適當配置擴散片或棱鏡片等作為光控制構件。 如上所述，本實施形態是使上述螢光燈丨〇、丨〇、丨2、 第1導光板4、第2導光板6構成以面狀照明液晶顯示面 板14的面光源裝f 2。而且’可藉由此面光源裝置2照日, 液晶顯示面板1 4。 (導光板組裝體） ^ π i π几傲η及第2導光板6 構成。各導光板是使用PMMA(pGlymethylmetha叫价 聚甲基丙烯酸甲醋）、pc(polycarbonate?《碳酸酷）、環劳 (Cycl〇〇lefin)系樹脂材料等透光性佳的材料而形成。 第1導光板4是以板厚從一對入射面8a、8b當中的 方朝另一方逐漸減少，而且柘严 向且板厗在入射面8a、8b間之大 中央部變得最薄的方式，使背面5 九In addition, the surface light source device used in the image display device of VT IVV has been 314883 5 200403502, and the surface light source device 56 shown in FIG. 17 is known. This surface light source device 56 is a plurality of fluorescent lamps 10 arranged near two side surfaces (two incident surfaces) 8 a and 8 b of the light guide plate 57 on opposite sides of each other, and the plurality of fluorescent lamps 10 The light is guided into the light guide plate 57 from the two incident surfaces 8a and 8b. During the propagation of the light in the light guide plate 5 7, the light is emitted in a plane shape from the exit surface 5 8 ° In this structure, the thickness of the device (T2) is smaller than the thickness of the device of the first conventional example (D1) (ΤΙ > Τ2). Therefore, the image display device 60 using the surface light source device 56 is more suitable for miniaturization (thinning) and lighter weight than the image display system device 5 5 using the surface light source device 54 of the first conventional example. Lesson 1 is easy. (Third Conventional Example) Fig. 18 is another conventional example applicable to a larger image display device. As shown in the figure, the surface light source device 61 is similar to the second conventional example in that a plurality of gold lamps 10 are respectively arranged near two side surfaces (two incident surfaces) 8a and 8b of the light guide plate 62. However, time has been spent on the cross-sectional shape of the light guide plate 62. That is, the plate thickness is formed at the substantially central portion of the rear surface 63 side of the light guide plate 62, and the plate thickness is gradually increased from the two incident surfaces 8 a and 8 b to the substantially central portion 5 6 ports. The surface light source device 6 1 It is easier to emit light propagating inside the light guide plate 62 than the surface light source device 56 of the second conventional example. Straight light = better than the surface light source device 56 of the second conventional example, the output can be improved. That is, using the surface light source device 61 of the third conventional example, the image = device 64 is better than the first conventional one. It is easier to achieve miniaturization (thinning) and lighter weight of the example, and it is possible to achieve higher brightness of the emitted light than the second conventional example. 314883 6 200403502 (Objective of the invention). As mentioned above, the second and third examples are easier to achieve miniaturization (thinning) than the first example. There is a strong demand to reduce power consumption. Therefore, an object of the present invention is to provide a surface light source device capable of avoiding emission of light and producing P bars, a T- ', and capable of reducing power consumption, an image display device using the surface light source device, and a device for these devices. Light guide plate assembly (assembly) used. (Technical Solution to Problem) The surface light source device of the present invention includes a first light guide plate and a second light guide plate. Here, the 'first light guide plate has two side surfaces (incident surfaces) located on opposite sides to each other, and a first light source and a second light source are respectively arranged near each side surface (incident surface). After the light from these first and second light sources passes through the two sides and is inserted into the light plate, the light is emitted as planar illumination light from the exit surface. A light guide plate engaging recess is housed on the back of the first light guide plate, and a second light guide plate is housed there. In addition, a light source accommodating recess is formed on the back surface # of the second light guide plate, and a third light source is accommodated there. Furthermore, the image display device of the present invention is constituted by combining the above-mentioned surface light source device and a member to be illuminated illuminated by the surface light source device. In addition, a light guide plate assembly (for the surface light source device or image display device) in which the second light guide plate is housed in the light guide plate engaging recess on the back side of the first light guide plate ( Combination). [Embodiment Mode] Hereinafter, embodiments of the present invention will be described in detail with reference to drawings. 31488 7 2〇04〇35〇2 [First embodiment] Figures 1 to 5 are image display devices according to the i-th embodiment of the present invention. ^ 1 Baixian Figure 1 is an image display device. Exploded oblique view. In addition, FIG. 2 is a perspective view of an external light source used in the image display device of FIG. Fig. 3 is a front view of the image display device of Fig. I. FIG. 4 is a view of the surface light source device 9 viewed from the direction A in FIG. 3. Fig. 5 is a rear view of the surface light source device 2 after removing the reflection sheet 3 of the surface light source device 2 shown in Fig. 3 (a view viewed from the direction b in Fig. 3). (Outline configuration of image display device) # In these drawings, the second light guide plate 6 is superposed on the back surface 5 side of the summer light guide plate 4 ', thereby constituting the light guide plate assembly 7. The third light guide plate 4 has a pair of side surfaces (incident surface, 讣) located on opposite sides to each other. Further, a rod-shaped fluorescent lamp as a first light source is arranged near the side surface (incident surface) 8a, and a side surface (incident surface) 8b There are rod-shaped fluorescent lamps as the second light source. These are preferably fluorescent lamps of the same size, shape, and type. Both are indicated by the symbol 10. In addition, on the back of the second light guide plate 6 & quot On the side (lower side in the i-th figure), a rod-shaped fluorescent lamp 12 as a third light source is arranged in a state substantially parallel to the fluorescent lamps 10 and 10, so as to face the first light guide plate. In the manner of the exit surface 4 (howl, upper side in Le 1) of 13, the liquid crystal display panel 14 is superposedly disposed as a member to be illuminated, and is disposed forcefully opposite to the rear surface of the second light guide plate 6 There is a reflection sheet 3. In addition, between the i-th light guide plate 4 and the liquid crystal display panel μ 314883 8 200403502, a diffusion sheet or a prism sheet may be appropriately arranged as a light control member depending on the situation. As described above, this embodiment is to make The above fluorescent lamps 丨 〇, 丨 〇, 丨 2, the first The light plate 4 and the second light guide plate 6 constitute a surface light source f 2 that illuminates the liquid crystal display panel 14 in a planar shape. Furthermore, the surface light source device 2 can be used to illuminate the liquid crystal display panel 1 4. (light guide plate assembly) ^ π i π is composed of π and second light guide plate 6. Each light guide plate is made of PMMA (pGlymethylmetha called polyvalent methacrylic acid vinegar), pc (polycarbonate? "carbon dioxide", and Cyclolefin resin. The first light guide plate 4 is gradually reduced in thickness from one of the pair of incident surfaces 8a, 8b toward the other, and is more rigid and the plate is on the incident surfaces 8a, 8b. The large central part becomes the thinnest way to make the back 5 nine
射面13是形成平坦面。 ^ H 亦即’帛1導光板4是如第3圖所示 中央部CL·為界形成/亡斟p aa 及右方向 小成左右對稱的形狀，且 射面8^朝中央部π逐漸減少的剖面形狀板 方;疋使“ 5側朝向斜上方傾斜， 螢光燈^1。的光更容易由…反射。 出射面13有效射出。 、，，°果先便可； …另外’藉由使背面5形成圓弧面形 第2導光板6收容在北而 確保用來并 叹合在月面5側的空間 第2導光板mu in &卡合凹處）15 疋U弟1導光板4 其上面(出射面)16側具有對應 &重疊’且 斧先板4之背面5側 3J4883 9 200403502 的形狀。而且是以中央部CL的板厚最厚的方式彎曲而形 成。而且’第2導光板6在重疊於第1導光板4的情況下， 其月面（下面）1 1側是形成大致平行於第1導光板4之出射 面1 3的平坦面。 亦即’當將第2導光板6重疊於第1導光板4而構成 ‘光板組裝體7時，第1導光板4的出射面13與第2導光 板6的月面1 1是大致平行。而且，在此第2導光板6的背 面11而且在第3圖的左右方向大致中央部形成有用來收 容螢光燈12的光源收容凹處I?。光源收容凹處I?是朝向 沿著第1導光板4之入射面8a、8b的方向延伸設置，而且 為了使螢光燈1 2的光有效地射入第2導光板6内’使剖面 形狀大致形成半圓形狀。 在此’本實施形態中的導光板組裝體7當將第2導光 板6的出射面16重疊於第！導光板4的背面5側而加以組 合時，是在第1導光板4之背面5側的空間15内收容第2 ‘光板6並且使弟1導光板4之入射面8 a、8 b側的板厚 形成導光板組裝體7的厚度尺寸。因此，藉由使用此導光 板組裝體7，可避免面光源裝置2的大型化。 (反射片） 反射片 3 是由白色 PET(p〇lyethylene glycol terephthalate ··聚對苯二甲酸乙二醇醋）等光反射性佳的材 料所形成，並且形成與第2導光板6之背面u大致相同大 小的矩形形狀。反射片3是使從第2導光板6之背面i】 射出的光擴散、反射而回到第2導光板6内部，可有效利 314883 10 200403502 用來自螢光燈1〇、10、12的光。 (燈管反射器） ' 燈管反射器18、i s θ丄 G疋由白多 = 脂材料、或是不鏽鋼板戋 、 $性佳的樹 饥及鋁板等光反射性佳的 形成。燈管反射器1 8、i s 兔屬材料所 1 «的上端緣是卡合在構 裝體7的第1導光板4 冓成冷光板組 奴4之出射面13的端緣。而下 合在反射片3的下面相“山络 而、'象疋卡 囟側钛緣。燈管反射器18 自螢光燈10、10的光朝6人61 具有使來 。光朝向入射Φ 8a、8b的功能。 (本貫施形態的作用•效果） 如以上構成的本實施形態去 7心、田宁，先的行進方式 所述。從螢光燈12發出的光從 以下 ^ ¥光板6的光源收容凹 處17的表面射入第2導井杯 乐2 ν九板6内部之後是在第2 内部傳播，在該過程中，相對 丄®^ I出射面）1 6的入射角 為臨界角以下的光會從第2導古 曰仗弟4先板6的出射面16射出。此 光會從第1導光板4的背面5側射第 π八乐i V九板4的内部。 另外，從螢光燈1 0、1 〇發出的本 以扣的光直接或由燈管反射器 18、18反射之後是從入射面8 射入弟1導光板4内 部，並且與經由第2導光板6射入之來白罄 心水自赏先燈12的光一 起在第1導光板4内部傳播。 在此過程當中，相對於出射φ 13 #入射角為臨界角以 下的光會從出射面13射出至外部。然後，從出射面^射 出的光是以面狀照明被照明構件（液晶顯示面板）14。 在此，第2導光板6由於是從背面丨丨導入螢光燈j 2 的光，因此比起從導光板之側面導入光的樣態，較沒有浪 314883 11 200403502 費’且而光的利用效率（朝向第1導光板4的射出效率）較高。 由方；不需要並列配置複數個螢 因此不 會有被鄰接的螢弁柃1Λ l 冤先k 1 ο、10所吸收的光，而可提升螢光燈 6 ^光的利用效率。而且，可利用來自配置於第2導光板 足？ ：U側的寬度方向中央部CL的螢光燈12的光來補 之=“垃1 〇、1 〇的光不易到達之部分，即第丨導光板4The radiation surface 13 is a flat surface. ^ H, that is, '帛 1, the light guide plate 4 is formed in the center portion CL as shown in FIG. 3, and the right direction is small to form a left-right symmetrical shape, and the radiation surface 8 ^ gradually decreases toward the center portion π. The cross-sectional shape of the board is square; 疋 make the "5 side inclined obliquely upward, fluorescent light ^ 1. The light is more easily reflected by ... The exit surface 13 is effectively emitted. ，,, ° can be achieved first;… In addition, by The back surface 5 is formed in a circular arc shape, and the second light guide plate 6 is housed in the north to ensure that it can fit in the space on the side of the lunar surface. The second light guide plate (mu in & engagement recess) 15 疋 U 弟 1 light guide plate 4 The upper side (the exit surface) of 16 sides has a shape corresponding to & overlapping, and the back side of the axe plate 4 5 side 3J4883 9 200403502. And it is formed by bending the thickness of the central part CL to the thickest. 2 When the light guide plate 6 is superimposed on the first light guide plate 4, the moon surface (lower side) 11 is a flat surface that is formed substantially parallel to the exit surface 13 of the first light guide plate 4. That is, '当 将 第When the 2 light guide plate 6 is superposed on the first light guide plate 4 to form the 'light plate assembly 7, the exit surface 13 of the first light guide plate 4 and the moon surface 11 of the second light guide plate 6 are large. In parallel, a light source accommodating recess I? For accommodating the fluorescent lamp 12 is formed on the back surface 11 of the second light guide plate 6 and a substantially central portion in the left-right direction in FIG. 3. The light source accommodating recess I? It extends toward the incident surfaces 8a, 8b of the first light guide plate 4, and in order to allow the light of the fluorescent lamp 12 to enter the second light guide plate 6 effectively, the cross-sectional shape is formed into a semi-circular shape. The light guide plate assembly 7 according to the embodiment is a space 15 on the back surface 5 side of the first light guide plate 4 when the light emitting surface 16 of the second light guide plate 6 is superposed on the back surface 5 side of the first! Light guide plate 4 and combined. The second light guide plate 6 is housed therein and the thickness of the incident surface 8 a, 8 b side of the light guide plate 4 of the first light guide plate is formed to the thickness dimension of the light guide plate assembly 7. Therefore, by using this light guide plate assembly 7, it can be avoided Increase in size of the surface light source device 2. (Reflective sheet) The reflective sheet 3 is formed of a material with high light reflectivity, such as white PET (polyethylene glycol terephthalate), and is formed with The back surface u of the second light guide plate 6 has a rectangular shape of approximately the same size. The sheet 3 diffuses and reflects the light emitted from the back surface of the second light guide plate 6 and returns to the inside of the second light guide plate 6, which can effectively use the light from the fluorescent lamps 10, 10, and 12. (Lamp reflector) 'Lamp reflector 18, is θ 丄 G 疋 is formed by white light = grease material, or stainless steel plate, good tree hunger and aluminum plate, etc.器 18 8. is the upper edge of the rabbit material material 1 «is the edge of the exit surface 13 of the first light guide plate 4 which is engaged with the structure body 7 and formed into the cold light plate slave 4. The bottom of the reflection sheet 3 is a "mountain ridge," which is like a titanium edge on the side of the card. The tube reflector 18 has the light from the fluorescent lamps 10 and 10 toward 6 people 61. The light is directed toward the incident Φ Functions of 8a and 8b. (Operation and effect of the present embodiment) As described in the above embodiment, the first way of travel is as described above. The light emitted from the fluorescent lamp 12 is as follows: The surface of the light source accommodating recess 17 of 6 penetrates into the second guide well Cuple 2 ν and then propagates in the second interior of the 6th plate. In this process, the relative angle of incidence (relative to the exit surface) is 1). The light below the critical angle will be emitted from the exit surface 16 of the second guide 4 and the front plate 6. The light will be emitted from the back 5 side of the first light guide plate 4 to the inside of the π eight music i V nine plate 4. In addition, the light originally emitted from the fluorescent lamps 10 and 10 is directly or reflected by the tube reflectors 18 and 18 and then enters the interior of the light guide plate 4 of the brother 1 from the incident surface 8 and passes through the second guide. The light from the light plate 6 comes in, and the light from the self-appreciating first lamp 12 propagates inside the first light guide plate 4. In the process, the incident angle φ 13 # is relative to the exit angle. The light below the angle is emitted from the exit surface 13 to the outside. Then, the light emitted from the exit surface ^ is used to illuminate the illuminated member (liquid crystal display panel) 14. In this case, the second light guide plate 6 is from the rear side 丨丨 The light from the fluorescent lamp j 2 is introduced, so compared with the situation where the light is introduced from the side of the light guide plate, there is less wave 314883 11 200403502 cost, and the light utilization efficiency (emission efficiency toward the first light guide plate 4) is better. High. By the side; there is no need to arrange a plurality of fireflies in parallel so there is no light absorbed by adjacent fireflies 1Λ l and k 1 ο, 10, and the utilization efficiency of fluorescent light 6 can be improved. The light from the fluorescent lamp 12 located at the central portion CL in the width direction on the U side can be used to supplement the part where the light is not easily reached, that is, the first guide Light plate 4
光板T中央部附近的出射光的亮度，且可利用來自第2導 來自第1 Ϊ射光直接照明帛1導光板4的背面5側，因此 的習知1導光板4的出射光效率比第17圖及第18圖所示 】更為提升。 因 itt ， 光源（·⑼一，使用導光板組裝體7的面光源裝置可用較少的 之亮度^光燈1〇、1〇、12)而實現與第2至第3習知例同樣 丨8圖所:、㈣照明光射出性能。亦即，比起如第17圖及第 ^ 1n 丁在各入射面8a、8b附近分別配置複數個螢光 至弟3習知例，消耗電力會減少。 面5:且，由於第2導光板6是收容在第i導光板4的背 4之入口此‘光板組裝體7的厚度尺寸就是第1導光板 2的射面8a、8b側的板厚尺寸，而不會導致面光源裝置 z的大别儿 圖所厂化〃。因此，本實施形態的面光源裝置2比起第 不的第1習知例更適合小型化、輕量化。 [第2實施形態] * 6圖疋第2貫施形態之圖像顯示裝置1所使用的面 光源裝菩q 置2。亦即，面光源裝置2具有將第κ導光板4在 板厚fL雀 辱的中央部加以左右分割為二（分割為第丨分割片 314883 200403502The brightness of the light emitted near the central portion of the light plate T can be directly illuminated by the second light from the first light beam 帛 1 on the back 5 side of the light guide plate 4, so the light output efficiency of the light guide plate 4 of the conventional 1 is higher than the 17th (See Figure and Figure 18). Because itt, the light source (· 1, the surface light source device using the light guide plate assembly 7 can be used with less brightness ^ light lamps 10, 10, 12), and the same as the second to third conventional examples 8 Figure :, the performance of ㈣ lighting light emission. That is, compared with the arrangement of a plurality of fluorescent lights to the conventional example 3 in the vicinity of each incident surface 8a, 8b as shown in FIG. 17 and ^ 1n, the power consumption is reduced. Surface 5: Also, since the second light guide plate 6 is housed in the entrance of the back 4 of the i-th light guide plate 4, the thickness of the light plate assembly 7 is the thickness of the light guide plate 2 on the sides of the radiation surfaces 8a and 8b. Without causing the Dabieer map of the area light source device z to be changed. Therefore, the surface light source device 2 according to this embodiment is more suitable for miniaturization and weight reduction than the first conventional example. [Second Embodiment] * Fig. 6: The surface light source device 2 used in the image display device 1 of the second embodiment. That is, the surface light source device 2 has a κ light guide plate 4 that is divided left and right into two at a central portion of the plate thickness fL (divided into 丨 divided pieces 314883 200403502
4 a及弟2分宝丨I η 1L工A 刀口J片4b兩部分）的構成。 、 根據k種構成，由 、弟1 ‘光板4是以中本的 左右對稱形狀，因此可 中央邛為界的 、 T以僅利用用來形成所分割之一方分 割片（4a或4b)的射出成形用模 八e H d 7用杈具來形成弟1導光板4的雨 4b因此，根據本實施形態，當然可獲得盥第 1實施形態同樣的效果，且 / J 1更权具費用低廉化，並謀求 產品價格的低廉化。 此外，本實施形態的面光源裝置2最好是在第i導光 板4的出射面13側配置擴散片（未圖示），並利用擴散片使 來自第1導光板4的出射光擴散、透過，藉此使第1導光 板4的分割部不易看見。 [第3實施形態] 第7圖是第3實施形態之圖像顯示裝置1所使用的面 光源裝置2。本實施形態的面光源裝置2是在第1導光板4 的背面5與第2導光板6的出射面1 6之間配置有用來使來 自第2導光板6的出射光擴散，然後向第1導光板4側透 過的擴散片20。 根據本實施形態，當然可獲得與前述第1實施形態同 樣的效果。而且，由於是利用擴散片20使從第2導光板6 射出的光擴散，因此不容易從第1導光板4的出射面13 側看見螢光燈（第3光源；以下相同）12。結果便可使從出 射面1 3射出的照明光的亮度更為均一化，並提升知、明°口4a and 2nd treasure 丨 I η 1L Worker A knife edge J piece 4b). According to the k kinds of constitutions, the light plate 4 is a left-right symmetrical shape of Nakamoto, so it can be bounded by the center ridge, and T is used to form the injection of only one of the divided pieces (4a or 4b). The molding die e H d 7 is formed with the fork 1 to form the rain 4b of the light guide plate 4 of the first brother. Therefore, according to this embodiment, the same effect as the first embodiment can be obtained, and the cost of / J 1 is reduced. , And strive to reduce the price of products. Further, in the surface light source device 2 of this embodiment, it is preferable that a diffusion sheet (not shown) is disposed on the exit surface 13 side of the i-th light guide plate 4, and the light emitted from the first light guide plate 4 is diffused and transmitted by the diffusion sheet. This makes it difficult to see the divided portions of the first light guide plate 4. [Third Embodiment] Fig. 7 is a surface light source device 2 used in an image display device 1 according to a third embodiment. The surface light source device 2 of this embodiment is arranged between the back surface 5 of the first light guide plate 4 and the exit surface 16 of the second light guide plate 6 to diffuse the light emitted from the second light guide plate 6 and then diffuse it toward the first A diffusion sheet 20 transmitted through the light guide plate 4 side. According to this embodiment, it is needless to say that the same effects as those of the first embodiment can be obtained. In addition, since the light emitted from the second light guide plate 6 is diffused by the diffusion sheet 20, it is not easy to see the fluorescent lamp (third light source; the same applies hereinafter) 12 from the exit surface 13 side of the first light guide plate 4. As a result, the brightness of the illuminating light emitted from the exit surface 1 3 can be more uniform, and the knowledge and brightness can be improved.
[第4實施形態] 314883 200403502 本貫施形態是在前述第3實施形態的面光源裝置2當 中方；擴散片20的表面形成光擴散圖案21，以調整來自 第2導光板6的出射光分布的樣態（參照第7圖）。 第8圖（a)是本實施形態之面光源裝置所採用的擴散片 的外觀斜視圖，第8圖(b)是展開該擴散片後的俯視圖。 如這些圖式所示，本實施形態是在前述第3實施形態[Fourth embodiment] 314883 200403502 This embodiment is the middle of the surface light source device 2 of the third embodiment; a light diffusion pattern 21 is formed on the surface of the diffusion sheet 20 to adjust the light distribution from the second light guide plate 6 (See Figure 7). Fig. 8 (a) is an external perspective view of a diffusion sheet used in the surface light source device according to this embodiment, and Fig. 8 (b) is a plan view of the diffusion sheet. As shown in these drawings, this embodiment is the third embodiment described above.
、光源衣置2备中，於擴散片2 0的表面形成光擴散圖案 2 1以凋整來自帛2導光板6的出射光分布(參照第7圖)。 利用印刷形成在擴散片2 〇之表面的光擴散圖案2 1是 在k光k 12的正上方形成最為緊密的形成密度，並且隨著 從螢光燈12正上方遠離使形成密度越為稀疏。此外，本實 施形態當中，光擴散圖案21的各構成要素22是圓形。另 外，各構成要素22的面積是由大逐漸變小，藉此使光擴散 圖案的密度隨著從螢光燈12正上方遠離，由密變疏而 等級化（參照第7圖）。 ¥光板4的出射面1 3側較不容 根據這種構成，從第 易看見第2導光板6側的勞光燈12，且可調整從第2導光 板6側朝向第i導光板4側的出射光分布。因此，可調整 來自弟1導光板4的出射光分布，且可使來自帛i導光板 4的出射光的亮度更為均一化（參照第7圖）。 此外’本實施形態是例示出在擴散片20的外表面形成 光擴散圖案21的樣態，但亦可在擴散片“的内表面（外表 面的相反側之面）形成光擴散圖案2 1。 [第5實施形態] 314883 14 200403502 第9圖是本實施形態所使用的導光 形態是在前述第1實施形態（參照第工回反。亦即，本實施' 第2導光板6的出射面16形成第8圖圖至第3圖）所示的 案。由此即可省略第4實施形所示的光擴散圖 配置。 更用的擴散片2 0之 如第9圖所示’形成在第2導光 擴散圖案21是隨著從螢光燈12正上…射® 16的光 由密變疏。因A，本實施形態的：：；使形成密度 述第4實施形態同樣的效果。而1，：：置2可獲得與前1 裝置2不需要配置於第2導光拓“貫施形態的面光源 擴散片20。 乐1 V先板4之間的 因此，比起前述第4舍# r , , 戶、^形悲的面光源裝置2，可減 乂零件數目，且可誤求產品價袼的低廉化。 …此外，第9圖是例示出在第2導光板6的出射面16 7 :光擴政圖木2 1的樣態，但亦可將光擴散圖案η形成 在第1導光板4的背面5側。而i，亦可在第2導光板6 · 與第1導光板4之相對向的兩面5、16形成光擴散圖案21。 另外，亦可將光擴散圖案2丨形成在第2導光板6之光源收. 容凹處17的内表面（參照第i圖至第3圖）。 [第6實施形態] 第1 0圖是第6貫施形態之圖像顯示裝置丨所使用的面 =源裝置2。本實施形態是使第2導光板6的出射面16及 第1導光板4的背面5(相互重疊的兩面)形成梨面等的粗面 23，使從第2導光板6射出的光以及射人第i導光板4的 314883 15 200403502 .光擴散。藉此’從第1導光板4的出射& 13側就不容易看 見第2導光板6側的螢光燈12。且可謀求來自帛丨導光板 4的出射光的亮度均一化。 在此’第2導光板6的出射面16以及第i導光板4 的背面5的粗面化可採用過去眾所週知的手法。例如，可 使模具的表面形成粗面’並且在射出成形時將其轉寫。另 外，亦可採用藉由喷砂處理或钱刻等直接使第i及第2導 光板4、6之表面粗面化的手法。本實施形態亦可獲得與前 述第5實施形態同樣的效果。 此外，本實施形態是例示出在第2導光板6的出射面 16以及第1導光板4的背面5兩面16、5形成粗面23的 樣態，但亦可形成在出射面1 6及背面5任何一方。另外， 亦可如第1 1圖所示，在第2導光板6之光源收容凹處i 7 的内表面形成粗面23。 [第7實施形態] 弟1 2圖疋苐7實施形態之圖像顯示裝置1所使用的面 光源裝置2。如該圖所示，本實施形態是在前述第1實施 形悲當中’於第2導光板6之光源收容凹處1 7的内側又配 置有燈光擴散片24。此燈光擴散片24是用來使螢光燈1 2 的光擴散而射入第2導光板6。 本實施形態當然可獲得與前述第1實施形態同樣的效 果。而且，螢光燈1 2的光是藉由燈光擴散片24擴散之後 射入第2導光板6，因此從第1導光板4的出射面13側不 容易看見螢光燈丨2。結果便可使從第]導光板4之出射面 16 314883 200403502 1 3射出的知、明光免度更為均一化，並提升照明品質。 、 此外，根據本實施形態，燈光擴散片24的尺寸可以比 配置於兩導光板4、6之重疊面5、16的擴散片20的尺寸 小，因此比起第3實施形態更可實現低成本化、輕量化（泉 照第7圖及第12圖）。 (第7實施形態的第1變形例） 在此，亦可如第13圖所示，在燈光擴散片24的内側 表面，並且在螢光燈1 2的正上方附近配置用來使光反射的_ 反射構件（光反射片或光反射性塗料等）2 5。在該情況下， 可防止來自螢光燈12的光筆直朝上方射出。結果，從第i 導光板4的出射面1 3側就不容易看見螢光燈12。如上述 構成時，當然可獲得與第7實施形態同樣的效果，且可使 從第1導光板4射出的照明光更為均質化。此外，如前述 第12圖所示，反射構件25亦可配置在燈光擴散片24的外 側表面’並且配置在螢光燈1 2的正上方附近。 (第7貫施形態的第2變形例） 另外，亦可如第14圖所示，在燈光擴散片24的外表 面形成光擴散圖案26。在此，光擴散圖案26與形成在前 述第4實施形態之擴散片2〇的光擴散圖案2丨同樣（參照第 8圖）’使形成密度在螢光燈12的正上方形成最為緊密， 隨著從螢光燈1 2正上方遠離，使形成密度越為稀疏。 如上述構成時’從第1導光板4的出射面1 3側就不容 易看見螢光燈12 ’且可對於射入第2導光板6之來自螢光 燈12的光的分布進行調整。結果便可調整來自第丨導光板 314883 17 200403502 4的出射光分布，且可實現來自第1導光板4的出射光亮 度的更均一化。 此外’本變形例是例示出在燈光擴散片24的外側表面 形成光擴散圖案2 6的樣態。但是亦可在燈光擴散片2 4的 内側表面形成光擴散圖案2 6，或是亦可在第2導光板6之 光源收容凹處1 7的内表面形成光擴散圖案2 6，以取代之。 [苐8實施形態]In the preparation of the light source clothes 2, a light diffusion pattern 21 is formed on the surface of the diffusion sheet 20 to adjust the distribution of the light emitted from the light guide plate 6 (see FIG. 7). The light diffusion pattern 21 formed on the surface of the diffusion sheet 20 by printing is formed with the densest formation density directly above the k light k 12, and the formation density becomes more sparse as it moves away from directly above the fluorescent lamp 12. In this embodiment, each of the constituent elements 22 of the light diffusion pattern 21 is circular. In addition, the area of each of the constituent elements 22 is gradually decreased from large to small, so that the density of the light diffusion pattern is gradually increased as it moves away from directly above the fluorescent lamp 12 and becomes denser and denser (see Fig. 7). ¥ The light exit surface 1 and 3 sides of the light guide plate 4 are less tolerant. According to this structure, the labor light 12 on the second light guide plate 6 side can be easily seen, and the light guide 12 from the second light guide plate 6 side to the i light guide plate 4 side can be adjusted Outgoing light distribution. Therefore, the distribution of the light emitted from the light guide plate 4 of the brother 1 can be adjusted, and the brightness of the light emitted from the light guide plate 4 can be made more uniform (see FIG. 7). It should be noted that the present embodiment exemplifies a state in which the light diffusion pattern 21 is formed on the outer surface of the diffusion sheet 20, but the light diffusion pattern 21 may be formed on the inner surface (the surface opposite to the outer surface) of the diffusion sheet. [Fifth Embodiment] 314883 14 200403502 Fig. 9 is a light guide pattern used in this embodiment in the first embodiment described above (refer to the first embodiment). That is, in this embodiment, the exit surface of the second light guide plate 6 16 is formed as shown in FIGS. 8 to 3). Thus, the light diffusion pattern arrangement shown in the fourth embodiment can be omitted. A more-used diffusion sheet 20 is formed as shown in FIG. 9 The second light guide diffusion pattern 21 changes from dense to thin as light emitted from the fluorescent lamp 12 directly above ... 16 due to A, the same effect as described in the fourth embodiment is achieved in the formation density. Whereas 1 :: 2 can be obtained, and the first device 2 does not need to be disposed in the surface light source diffusion sheet 20 in the second light guide extension mode. Therefore, compared with the above-mentioned 4th surface light source device 2, the number of parts can be reduced, and the price of the product can be mistakenly reduced. … In addition, FIG. 9 illustrates an example in which the light exit surface 16 7 of the second light guide plate 6 is a light spreading map 2 1, but a light diffusion pattern η may be formed on the back surface 5 of the first light guide plate 4. side. On the other hand, i may form a light diffusion pattern 21 on both surfaces 5 and 16 of the second light guide plate 6 · and the first light guide plate 4 which are opposite to each other. In addition, the light diffusion pattern 2 丨 can also be formed on the inner surface of the light-receiving recess 17 of the second light guide plate 6 (refer to FIGS. I to 3). [Sixth Embodiment] FIG. 10 is a diagram showing a surface used in the image display device of the sixth embodiment, the source device 2. In this embodiment, the exit surface 16 of the second light guide plate 6 and the back surface 5 (the two surfaces that overlap each other) of the first light guide plate 4 are formed into a rough surface 23 such as a pear surface, and the light emitted from the second light guide plate 6 and the light are emitted. 314883 15 200403502 of the i-th light guide plate 4. Light diffusion. This makes it difficult to see the fluorescent lamp 12 on the second light guide plate 6 side from the exit & 13 side of the first light guide plate 4. In addition, the brightness of the light emitted from the light guide plate 4 can be made uniform. Here, the roughening of the exit surface 16 of the second light guide plate 6 and the back surface 5 of the i-th light guide plate 4 can be performed by a conventionally well-known method. For example, the surface of the mold can be roughened 'and transferred during injection molding. In addition, a method of directly roughening the surfaces of the i-th and second light guide plates 4, 6 by sandblasting, engraving, or the like may be employed. This embodiment can also obtain the same effects as the fifth embodiment described above. In addition, this embodiment shows an example in which the exit surface 16 of the second light guide plate 6 and the back surface 5 of both sides 16 and 5 of the first light guide plate 4 form a rough surface 23, but may be formed on the exit surface 16 and the back surface. 5 either party. In addition, as shown in FIG. 11, a rough surface 23 may be formed on the inner surface of the light source receiving recess i 7 of the second light guide plate 6. [Seventh Embodiment] Fig. 12 is a surface light source device 2 used in the image display device 1 of the seventh embodiment. As shown in the figure, in this embodiment, a light diffusion sheet 24 is arranged inside the light source receiving recess 17 of the second light guide plate 6 among the first embodiment. The light diffusion sheet 24 diffuses the light from the fluorescent lamp 12 and enters the second light guide plate 6. Of course, this embodiment can obtain the same effects as those of the first embodiment. In addition, since the light of the fluorescent lamp 12 is diffused by the light diffusion sheet 24 and enters the second light guide plate 6, it is not easy to see the fluorescent lamp 2 from the exit surface 13 side of the first light guide plate 4. As a result, the knowledge and brightness of the light emitted from the light-emitting surface 4 of the first light guide plate 16 314883 200403502 1 3 can be more uniform, and the lighting quality can be improved. In addition, according to this embodiment, the size of the light diffusion sheet 24 can be smaller than the size of the diffusion sheet 20 arranged on the overlapping surfaces 5 and 16 of the two light guide plates 4 and 6, so it can achieve a lower cost than the third embodiment. Lightening and lightening (Quan Zhao, Figures 7 and 12). (First Modification of the Seventh Embodiment) Here, as shown in FIG. 13, a light reflecting plate 24 may be disposed on the inner surface of the light diffusion sheet 24 and directly near the fluorescent lamp 12 to reflect light. _ Reflective members (light reflecting sheet or light reflective paint, etc.) 2 5. In this case, the light from the fluorescent lamp 12 can be prevented from being emitted straight upward. As a result, it is difficult to see the fluorescent lamp 12 from the exit surface 13 side of the i-th light guide plate 4. With the above configuration, it is a matter of course that the same effect as that of the seventh embodiment can be obtained, and the illumination light emitted from the first light guide plate 4 can be made more homogeneous. In addition, as shown in FIG. 12 described above, the reflecting member 25 may be disposed on the outer side surface 'of the light diffusion sheet 24 and near the fluorescent lamp 12 directly above. (Second modification of the seventh embodiment) A light diffusion pattern 26 may be formed on the outer surface of the light diffusion sheet 24 as shown in Fig. 14. Here, the light diffusion pattern 26 is the same as the light diffusion pattern 2 丨 formed on the diffusion sheet 20 of the fourth embodiment described above (see FIG. 8), so that the formation density is formed most closely above the fluorescent lamp 12, and then Move away from directly above the fluorescent lamp 12 to make the formation density more sparse. With the above configuration, 'the fluorescent lamp 12 is difficult to see from the exit surface 13 side of the first light guide plate 4', and the distribution of the light from the fluorescent lamp 12 incident on the second light guide plate 6 can be adjusted. As a result, the distribution of the emitted light from the light guide plate 314883 17 200403502 4 can be adjusted, and the brightness of the emitted light from the first light guide plate 4 can be more uniform. It is to be noted that the present modification is an example in which a light diffusion pattern 26 is formed on the outer surface of the light diffusion sheet 24. However, a light diffusion pattern 26 may be formed on the inner surface of the light diffusion sheet 24, or a light diffusion pattern 26 may be formed on the inner surface of the light source receiving recess 17 of the second light guide plate 6 instead of it. [苐 8 EMBODIMENT]
第1 5圖疋第8貫施形態之圖像顯示裝置丨所使用的面 光源裝置2。如該圖所示，在反射片3的上面（與第2導光 板6之背面相對向的面）28形成有光吸收圖案。光吸收 圖案27在對應於螢光燈12之部分（螢光燈12的正下方附 近）的形成始、度瑕為緊密，離該處越遠形成密度越為稀疏。 光吸收圖t 27是由使用光吸收性墨水而形《的大致圓形 多數個光吸收要素30所構成，並且藉由改變 ς 成密度具有梯度（等級）。 使化 [其他實施形態] 鉍此外’上述各實施形態當中’亦可在第1導光板的出 :側利用透明的導電性樹脂印刷透明電極。此透明電極 板去除從勞光燈發出的高頻雜訊，以防止液晶顯示面 板因南頻雜訊所導致的圖像混亂。 第2=板ΐ述各實施形態當中’亦可在帛1導光板4及 或第7導光板t至少一方内部混入折射率與第1導光板4 之折射率不同的材料所構成的微粒子。 夕’上述各實施形態是使用螢光燈1〇、12作為第1 314883 18 200403502 至第3光源，但亦可长石f 亚歹i奴數個發光二極體（L£D)，並將， 此複數個LED作為各光源。 [發明之效果] 如以上所說明，根據本發明，由於是將第2導光板收 容在第1導光板之背面的導光板卡合凹處，因此可謀求面 光源各^置以及具備jJ：卜y 士 一 面先源凌置的圖像顯示裝置的小型 化、輕量化。而且，不口曰"Λ μ 不/、疋攸弟1導光板之相對向的兩側 面側導入第1及第2井泝的 、、，而是在從第2導光板的背< 面V入來自第3光源的光之 入P i Ί 、曾ι立 攸弟1 ¥光板的背面側導 入k弟2導光板之出射面射 # 5 〇 L 出的光，因此可有效利用第1 光源至第j)光源的光。社果 亮的面照明。便可以較少電力的光源實現明 【圖式簡單說明】 第1圖是本發明第i實施 斜視圖。 7心、之圖像頦不裝置的分解 第2圖是第i實施形態 視圖。 、光源裝置的外觀斜讀 第3圖是第丨實施形態 圖。 ^用的面光源裝置的前視 第4圖是在第3圖中 裝置的俯視圖。 方向親看的圖，且是面光源 第5圖是在第3圖中 射片後從北向觀看的圖，且是去除反 々便攸月面硯看面光源裝置的圖。 疋云丨示反 第6圖是第2實施形態 之面光源裝置的夕卜觀斜視圖。 314883 19 200403502 第7圖是第3實施形態之面光源裝置的前視圖。 系8圖（a)是第4實施形態之面光源裝置所採用的擴a 片的外觀斜視圖，（b)是展開該擴散片後的俯視圖。 文 第9圖是第5實施形態之面光源裝置所採用的第2、曾 光板的外觀斜視圖。 ^ :1〇圖是第6實施形態之面光源裝置的前視圖。 第1 1圖是第6實施形態之變形例的面 几你展置的丽視 圖。 第12圖是第7實施形態之面光 〜 么夏的刖視圖。 弟1 3圖是第7實施形態之第1變形 私ϋ的义、目回 例所使用的燈光擴 散片的别視圖。 第1 4圖是第7實施形態之第2變形 ^ ^ , 矛艾〜例所使用的燈光擴 散片的外硯斜視圖。 第1 5圖是第8實施形態之面光源裝 圖 衣置的部分分解斜視 第1 6圖是第i習知例的面光源裝 十Λη I的前視圖。 弟17圖是第2習知例的面光源裝置 斤，。 尾的前視圖。 弟1 8圖是第3習知例的面光源裝 臬的前視圖。 1、60、64圖像顯示裝置 3 反射片 4a、4b分割片_ 6 第2導光板 8a、8b入射面（側面）Fig. 15 is a surface light source device 2 used in the image display device of the eighth embodiment. As shown in the figure, a light absorption pattern is formed on the upper surface of the reflection sheet 3 (the surface facing the rear surface of the second light guide plate 6) 28. The light absorption pattern 27 is formed at the portion corresponding to the fluorescent lamp 12 (near the fluorescent lamp 12), and the degree of defect is tight, and the further away from it, the denser the formation density. The light absorption chart t 27 is composed of a plurality of light absorption elements 30 having a substantially circular shape using a light absorbing ink, and has a gradient (level) by changing the density. [Other Embodiments] In addition to bismuth, 'out of the above-mentioned embodiments', a transparent electrode may be printed with a transparent conductive resin on the exit side of the first light guide plate. This transparent electrode plate removes high-frequency noise from the light, so as to prevent the image of the LCD panel from being chaotic due to the south-frequency noise. Among the embodiments described in the second = plate, 'fine particles made of a material having a refractive index different from that of the first light guide plate 4 may be mixed into at least one of the first light guide plate 4 and the seventh light guide plate t. In the above embodiments, the fluorescent lamps 10 and 12 are used as the first light source 314883 18 200403502 to the third light source, but a plurality of light-emitting diodes (L £ D) may also be used for feldspar f. The plurality of LEDs are used as each light source. [Effects of the Invention] As described above, according to the present invention, since the second light guide plate is accommodated in the light guide plate engaging recess on the rear surface of the first light guide plate, each surface light source can be provided and provided with jJ: As for the image display device, the first source is miniaturized and lightened. Moreover, instead of saying, "Λ μ No," the first and second wells are introduced on opposite sides of the opposite side of the light guide plate of the Yau brother 1, but on the < surface from the back of the second light guide plate. The light from the third light source, P i 、, Zeng Liyou 1 ¥ The back side of the light plate introduces the light emitted from the light emitting surface of the light guide plate # 2 〇L, so the first light source can be effectively used To j) Light from the light source. Social fruit Bright surface lighting. It can be realized by a light source with less power. [Brief description of the drawings] Fig. 1 is an oblique view of the i-th embodiment of the present invention. Fig. 7 is an exploded view of the device. Fig. 2 is a view showing the i-th embodiment. 3. The external appearance of the light source device is obliquely read. Fig. 3 is a diagram showing the first embodiment. Front view of a surface light source device for use Figure 4 is a plan view of the device in Figure 3. The figure viewed from the direction is a surface light source. Figure 5 is a view from the north direction after shooting in Figure 3, and is a view of the surface light source device without removing the side effect. The cloud is shown in reverse. Figure 6 is a perspective view of a surface light source device according to the second embodiment. 314883 19 200403502 Fig. 7 is a front view of a surface light source device according to a third embodiment. FIG. 8 (a) is an external perspective view of an enlarged sheet used in the surface light source device according to the fourth embodiment, and (b) is a plan view of the expanded sheet. Fig. 9 is a perspective view showing the appearance of a second and a second light panel used in the surface light source device according to the fifth embodiment. ^: 10 is a front view of a surface light source device according to a sixth embodiment. Fig. 11 is a perspective view showing a modification of the sixth embodiment. Fig. 12 is a perspective view of the light from the seventh embodiment to the light. Fig. 13 is another view of a light diffusion sheet used in the first modification of the seventh embodiment of the private sense and the example of the present invention. FIG. 14 is a perspective view of a light emitting diffuser used in the second modification ^ ^ of the seventh embodiment. FIG. 15 is a partially exploded perspective view of a surface light source device according to an eighth embodiment. FIG. 16 is a front view of a surface light source device 10 Λη I according to a conventional example. Figure 17 is a surface light source device of the second conventional example. Tail front view. Figure 18 is a front view of the surface light source device of the third conventional example. 1, 60, 64 image display devices 3 Reflective sheet 4a, 4b split sheet_ 6 Second light guide plate 8a, 8b Incident surface (side)
2、5 4、S 、6 1面光源裝置 4 第1導光板 5 ' 11 、 63 背面 7 I先板組裝體 314883 20 200403502 10 螢 光 燈（第1 光源/第： 2光源） 12 螢 光 燈（第3 光源） 13、16 、52 、5 8出射面 14、 53 液 晶 顯示面板（被照明 構件） 15 空 間（導光板收容凹處） 17 光源 收容凹處 18 燈 管 反射器 20、24 、50 : 擴散板（片） 2 1、 26 光·' ί廣' 敗圖案 22 構成 要素 23 粗 面 25 反射 構件 27 光 吸 收圖案 28 上面 30 光 吸 收要素 5 1 螢光 燈 57、 62 導 光 板 21 3148832, 5 4, S, 6 1 surface light source device 4 1st light guide 5 '11, 63 back 7 I front panel assembly 314883 20 200403502 10 fluorescent light (1st light source / 2nd light source) 12 fluorescent light (3rd light source) 13, 16, 52, 5 8 Exit surface 14, 53 Liquid crystal display panel (lighted member) 15 Space (light guide plate receiving recess) 17 Light source receiving recess 18 Lamp reflector 20, 24, 50 : Diffusion plate (sheet) 2 1, 26 Light · 'ί 广' pattern 22 Component 23 Rough surface 25 Reflective member 27 Light absorption pattern 28 Upper 30 Light absorption element 5 1 Fluorescent lamp 57, 62 Light guide plate 21 314883
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002210931A JP4030050B2 (en) | 2002-07-19 | 2002-07-19 | Surface light source device, image display device, and light guide plate assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200403502A true TW200403502A (en) | 2004-03-01 |
| TWI293709B TWI293709B (en) | 2008-02-21 |
Family
ID=31934301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW092119377A TWI293709B (en) | 2002-07-19 | 2003-07-16 | Surface light source device, image display device and light guide plate assembly |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4030050B2 (en) |
| KR (1) | KR20040010261A (en) |
| TW (1) | TWI293709B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8746909B2 (en) | 2011-04-29 | 2014-06-10 | Au Optronics Corporation | Backlight module |
| US9482897B2 (en) | 2013-01-23 | 2016-11-01 | Lg Electronics Inc. | Planar lighting device |
| US9523885B2 (en) | 2014-10-31 | 2016-12-20 | Lg Electronics Inc. | Backlight unit and display device having backlight unit |
| TWI579620B (en) * | 2014-10-31 | 2017-04-21 | Ｌｇ電子股份有限公司 | Backlight unit and display device having backlight unit |
| US9740047B2 (en) | 2014-10-31 | 2017-08-22 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US10030845B2 (en) | 2014-10-31 | 2018-07-24 | Lg Electronics Inc. | Backlight unit and display device having backlight unit |
| US12000582B2 (en) | 2015-07-31 | 2024-06-04 | Lg Electronics Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100616625B1 (en) * | 2004-10-20 | 2006-08-28 | 삼성전기주식회사 | Large size backlight apparatus reduced in thickness |
| KR100687355B1 (en) * | 2004-11-12 | 2007-02-27 | 비오이 하이디스 테크놀로지 주식회사 | Backlight unit of liquid crystal display device |
| US7815355B2 (en) | 2005-08-27 | 2010-10-19 | 3M Innovative Properties Company | Direct-lit backlight having light recycling cavity with concave transflector |
| WO2007027521A1 (en) | 2005-08-27 | 2007-03-08 | 3M Innovative Properties Company | Illumination assembly and system |
| US20070047228A1 (en) * | 2005-08-27 | 2007-03-01 | 3M Innovative Properties Company | Methods of forming direct-lit backlights having light recycling cavity with concave transflector |
| KR100653070B1 (en) | 2005-09-05 | 2006-12-01 | 삼성전자주식회사 | Liquid crystal display |
| KR100699266B1 (en) | 2005-09-09 | 2007-03-27 | 삼성전자주식회사 | Backlight unit and display device having the same |
| CN201237121Y (en) * | 2008-06-25 | 2009-05-13 | 武良举 | Embedded lamp with auxiliary lighting function |
| KR101368020B1 (en) | 2010-01-13 | 2014-02-26 | 후지필름 가부시키가이샤 | Light guide plate, surface illuminating device, and liquid crystal display device |
| TWI475264B (en) * | 2010-05-14 | 2015-03-01 | Fujifilm Corp | Light guide plate, planar illumination device, and liquid crystal display device |
| JP5425026B2 (en) | 2010-09-08 | 2014-02-26 | 富士フイルム株式会社 | Light guide plate, planar illumination device, and liquid crystal display device |
-
2002
- 2002-07-19 JP JP2002210931A patent/JP4030050B2/en not_active Expired - Fee Related
-
2003
- 2003-07-16 TW TW092119377A patent/TWI293709B/en active
- 2003-07-18 KR KR1020030049351A patent/KR20040010261A/en active IP Right Grant
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8746909B2 (en) | 2011-04-29 | 2014-06-10 | Au Optronics Corporation | Backlight module |
| US10185178B2 (en) | 2013-01-23 | 2019-01-22 | Lg Electronic Inc. | Planar lighting device |
| US9482897B2 (en) | 2013-01-23 | 2016-11-01 | Lg Electronics Inc. | Planar lighting device |
| US9494824B2 (en) | 2013-01-23 | 2016-11-15 | Lg Electronics Inc. | Planar lighting device |
| US11513390B2 (en) | 2013-01-23 | 2022-11-29 | Lg Electronics Inc. | Planar lighting device |
| US9551899B2 (en) | 2013-01-23 | 2017-01-24 | Lg Electronics Inc. | Planar lighting device |
| US11249344B2 (en) | 2013-01-23 | 2022-02-15 | Lg Electronics Inc. | Planar lighting device |
| US10962833B2 (en) | 2013-01-23 | 2021-03-30 | Lg Electronics Inc. | Planar lighting device |
| US10613383B2 (en) | 2013-01-23 | 2020-04-07 | Lg Electronics Inc. | Planar lighting device |
| US10353242B2 (en) | 2013-01-23 | 2019-07-16 | Lg Electronics Inc. | Planar lighting device |
| US9910316B2 (en) | 2014-10-31 | 2018-03-06 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US10883703B2 (en) | 2014-10-31 | 2021-01-05 | Lg Electronics Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
| US10203087B2 (en) | 2014-10-31 | 2019-02-12 | Lg Electronis Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
| US10030845B2 (en) | 2014-10-31 | 2018-07-24 | Lg Electronics Inc. | Backlight unit and display device having backlight unit |
| US10365513B2 (en) | 2014-10-31 | 2019-07-30 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US10408422B2 (en) | 2014-10-31 | 2019-09-10 | Lg Electronics Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
| US9933657B2 (en) | 2014-10-31 | 2018-04-03 | Lg Electronics Inc. | Backlight unit and display device having backlight unit |
| US10768479B2 (en) | 2014-10-31 | 2020-09-08 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US10838254B2 (en) | 2014-10-31 | 2020-11-17 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US10203549B2 (en) | 2014-10-31 | 2019-02-12 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US9740047B2 (en) | 2014-10-31 | 2017-08-22 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| TWI579620B (en) * | 2014-10-31 | 2017-04-21 | Ｌｇ電子股份有限公司 | Backlight unit and display device having backlight unit |
| US11287691B2 (en) | 2014-10-31 | 2022-03-29 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US9523885B2 (en) | 2014-10-31 | 2016-12-20 | Lg Electronics Inc. | Backlight unit and display device having backlight unit |
| US11566776B2 (en) | 2014-10-31 | 2023-01-31 | Lg Electronics Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
| US11579487B2 (en) | 2014-10-31 | 2023-02-14 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US11860474B2 (en) | 2014-10-31 | 2024-01-02 | Lg Electronics Inc. | Backlight unit and display device including backlight unit |
| US12000582B2 (en) | 2015-07-31 | 2024-06-04 | Lg Electronics Inc. | Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040010261A (en) | 2004-01-31 |
| JP2004055327A (en) | 2004-02-19 |
| JP4030050B2 (en) | 2008-01-09 |
| TWI293709B (en) | 2008-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW200403502A (en) | Surface light source device, image display device and light guide plate assembly | |
| TW539873B (en) | Light guide plate, surface light source device and display device | |
| US5410454A (en) | Device for supplying incident light to edge light panels | |
| US7360938B2 (en) | Surface light-source device and display unit using the same | |
| US20070274099A1 (en) | Light expanding system for producing a planar light beam from point light sources | |
| JPH0365982A (en) | Display board illuminating device for display device | |
| JP2003262734A (en) | Light guide plate | |
| JPH10307212A (en) | Side light type surface light source device | |
| GB2443215A (en) | An illumination system having a light source and a light guide | |
| JP2006228494A (en) | Lighting device | |
| CN102141219A (en) | Backlight unit and display device using same | |
| JP4014026B2 (en) | Surface light source device, image display device, and light guide plate | |
| JP2003187620A (en) | Planar luminous device and liquid crystal display device equipped with the same | |
| JP2005228718A (en) | Light guide plate | |
| JP2004271871A (en) | Light guide plate, surface light source device and liquid crystal display device | |
| CN110967869B (en) | Front light source, use method and display device | |
| JP2000003609A (en) | Sidelight type surface light source device and liquid crystal display device | |
| CN101169539A (en) | Direct backlight module group and liquid crystal display device | |
| JP2004022175A (en) | Surface light source, image display device, and light guide assembly | |
| TWI275871B (en) | Backlight system | |
| JP2006286263A (en) | Lighting system | |
| JP2007052938A (en) | Backlight device | |
| US20040252256A1 (en) | Light guide plate for a backlight module | |
| JPS59147387A (en) | Plane diffuser | |
| JP2004171192A (en) | Optical information reading device |