201229586 六、發明說明： 【發明所屬之技術領域】 本發明係關於導光面板。具體而言，是關舲組 仃動電活等之移動裝置上，用在照明用或顯示用之 發光裝置所使用的發光面板。 【先前技術】 (一般之面狀發光裝置） 第1圖乃不意地顯示使用了導光面板之面狀發 置的概略俯視圖，係顯示在發光時。第2圖為沿著 圖中之X-X線所作的剖視圖。此面狀發光裝置係將 源放射出之光取入導光面板内並擴展成面狀，並使 導光面板表面的既定發光區域射出者。 如第1圖所示，此面狀發光裝置丨丨係將導光 13重豐配置於基板12之表面’在與導光面板Η之 射端面1 5對向的位置將光源1 4安裝於基板1 2上者 導光面板1 3之背面，如第2圖所示，以與欲使光射 既定發光區域對向之方式形成顯示區1 6。於圖示例 於導光面板13之背面的整體呈現字母ΓΑ」的區域 由凹設複數個微細的三角稜鏡狀之擴散圖案17而 顯示區1 6。擴散圖案1 7之光源側之面形成約4 5。的 面。光源1 4係將LED晶片封入樹脂製殼體内而成的 光源’其具有比導光面板13之光射入端面的寬度還 寬度。光源14係將其光射出面配置成接近於導光 13之光射入端面15。 裝在 面狀 光裝 第1 自光 光從 面板 光入 。於 出之 中， ，藉 形成 傾斜 LED 小之 面板 -4 - 201229586 於此面狀發光裝置1 1中，當點亮光源14時， 源1 4放射出之光，會從光射入端面1 5射入導光面 内。射入導光面板13内之光，如第2圖之箭頭所ή 導光面板1 3之表面及背面被反複地進行全反射，| 被擴散至整個導光面板13’並於此途中藉由擴散圖 被全反射的光係自導光面板丨3之表面朝前方射出< 果’當從前方觀察面狀發光裝置u時，只有顯示區 如’第1圖中之字母「A」的區域）會明亮地發光。 然而’於導光面板13内，實際上會像在第1圖 有點狀之陰影線的區域那樣，存在有不進行光之導 區域B。因此’當如第1圖所示在區域b内設置_ 16時’區域B内之顯示區16不發光，例如，成為 了予母「A」的一部份之顯示。 於區域B内不進行光之導光的理由如下。即使 源14射出之光相對於發光之中心轴（通過光源14 垂直於光源1 4之光放射面的軸），在兩側具孝 之展開’但因為光在自光射入端面15射入導光面 、、際會折射’所以’光在導光面板13内拓展的| 成為以發光中心軸為中心而於此中心兩側由角度 9 0 0 ·、 ’以下稱為擴展角）所擴展的區域。此擴展角θ 曰折射率產生之臨界角相等的I，例如，若導夫 t 折射>率n為159’則依據司乃耳定律，0=arcsin 藉此’在比自與光射入端面15之兩端對命 置以擴展角Θ证仙 ' >^伸之各線段還靠外側的區域B内， 自光 板13 t，在 备此， 案17 其結 16(例 丨中標 -光的 丨不區 >欠缺 •自光 之中 「90。 板13 &圍， θ(< 係與 ，面板 .(1/n) I的位 不進 -5- 201229586 另外，自光源14放射之光的配向係大致成為郎伯分 布，所以，射入導光面板13内之光的配向’亦是在發光 中心軸方向上，其光強度大，而在越是與發光中心軸形 成大的角度之方向，則光強度越小。因此，即使以不重 疊於不導光之區域B的方式設置顯示區丨6’仍會有顯示 區1 6之中央部明亮地發光，但兩端部份變暗的情況。 為了避免這些不良狀況，如第3圖所示’雖可使顯 示區16充分地遠離光源14且以顯示區16不與不導光之 區域B重疊的方式設置顯示區16，但此情況下，與顯示 區16之大小相比，導光面板1 3之尺寸亦變大。當導光 面板1 3之尺寸變大時，則導光面板1 3之利用效率變差， 並且使得組入行動裝置（尤其是小塑行動裝置）之作業變 得困難。 (—般的面狀發光裝置之改良例） 為了改善如上述之配光的不均勻性’提出一種在導 光面板之光射入端面施作加工之面狀發光裝置。第4及 第5圖顯示此種改良例之其中一例。第4圖為顯示面狀 發光裝置之改良例的概略俯視圖。第5圖為該改良例之 概略剖視圖，為沿與第1圖之χ_χ線對應的線段之第4 圖的剖視圖。 於此改良例中，如第4圖所示，與光源14對向且於 光射入端面15的一部份設置從垂直於導光面板13的表 面之方向觀察時被彎曲成圓弧狀的凹部1 8。當在與光源 1 4對向之位置上，於光射入端面1 5設置圓弧狀的凹部 18時’射入導光面板13内之前後的光之行進方向的變 -6 - 201229586 化與平坦之光射入端面丨5的情況比較變 導光面板13内之光的擴展變寬。因此， 行光之導光的區域B的面積。 」而，根據此改良例，如第5圖所示，e 原因，光源u之光放射面與導光面板i3的 15之間的間隙變大’因此，自光源14射出 漏光而變得不容易射入導光面板13内。因 14放射而射入導光面板1 3内之光量減少， 效率的降低，所以，會有顯示區16整體變暗后 (有關專利文獻1) 另外，於專利文獻1揭示有如第ό圖所 板組件。於專利文獻1之發光面板組件中， 域2 1(用以使光射出之有效區域）的端面，設 對來自光源23之光進行擴展並輸入光輸出β 移動區域22，且於各個光移動區域22之一 23 ° 根據此種構造，如第6圖中之2點鏈線 個光移動區域2 4及一個光源2 5所構成之 可縮短光移動區域22之長度。但是，僅以其 源23，則在第6圖中以虛線所圈的區域内， 輪而使得該區域變暗’所以’需要有2個光调 輸出區域21之寬度變大’則需要更多個光$ 具有製造成本及消耗電力增加的不良。 得較小，所 可減小不進 3凹部1 8之 光射入端面 之光朝上方 此，自光源 造成光利用 不良情況。 示之發光面 於光輸出區 置2個用以 I域21的光 端配置光源 所示，與由 情況比較， 中任一個光 光無法被傳 .23(隨著光 篆），所以， 201229586 先前技術 專利文獻 專利文獻1 日本特表2002-53 8577號公報（第7圖） 【發明内容】 [發明所欲解決之課題] 本發明係鑒於此種技術課題而完成者，其目的在於 提供一種藉由擴展所射入之光的配向，可擴大有效區 域，且光利用效率不容易降低，而且光的配向分布之控 制性高的導光面板。 [解決課題之手段] 本發明之導光面板，係將光源的光以自端面取入而 擴展成面狀’藉由設於光射出面及與該光射出面對向之 面當中至少一面上的擴散圖案使光穿透或反射，而自該 光射出面之既定區域朝外部射出光的方式構成之導光面 板，其特徵為：於該端面中的光源之光所射入的區域附 近，且於該光射出面及與該光射出面對向之面當中至少 一面上設置用以擴展進行導光之光的配向方向之配光枰 制圖案。 ^ 本發明之導光面板， 係於來自光源之光所射 入的區201229586 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a light guide panel. Specifically, it is a light-emitting panel used in a light-emitting device for illumination or display on a mobile device such as a group. [Prior Art] (General planar light-emitting device) Fig. 1 is a schematic plan view showing a planar arrangement using a light guide panel, which is displayed during light emission. Fig. 2 is a cross-sectional view taken along the line X-X in the figure. The planar light-emitting device takes light emitted from the source into the light guide panel and expands into a planar shape, and emits a predetermined light-emitting area on the surface of the light guide panel. As shown in Fig. 1, the planar light-emitting device 重 is arranged such that the light guide 13 is placed on the surface of the substrate 12 at a position opposite to the end surface 15 of the light guide panel 将, and the light source 14 is mounted on the substrate. The back surface of the upper light guide panel 13 is formed as shown in Fig. 2 so as to form the display area 16 so as to face the predetermined light-emitting area. In the example of the drawing, the area of the back surface of the light guide panel 13 which is shown in the entirety of the letter ΓΑ" is formed by recessing a plurality of fine triangular-shaped diffusion patterns 17 to display the area 16. The surface on the light source side of the diffusion pattern 17 forms about 45. The face. The light source 14 is a light source which is formed by enclosing the LED wafer in a resin case, and has a width which is wider than the width of the light incident end surface of the light guide panel 13. The light source 14 is arranged such that its light exit surface is arranged close to the light incident surface 15 of the light guide 13. Mounted in a flat light, the first self-light is incident from the panel. In the middle, in the surface of the planar light-emitting device 1 1 , when the light source 14 is lit, the light emitted from the source 14 will be incident from the light to the end face 1 5 . Inject into the light guide surface. The light incident on the light guide panel 13 is repeatedly reflected and totally reflected on the front surface and the back surface of the light guide panel 13 as indicated by the arrow in Fig. 2, and is diffused to the entire light guide panel 13' by way of The light system whose total reflection is totally reflected is emitted from the surface of the light guide panel 丨3 toward the front. <When the planar light-emitting device u is viewed from the front, only the display area such as the area of the letter "A" in the first figure is displayed. ) will glow brightly. However, in the light guide panel 13, there is actually a region B in which the light is not guided, as in the hatched region of the first figure. Therefore, when the _16 is set in the area b as shown in Fig. 1, the display area 16 in the area B does not emit light, for example, it becomes a part of the display of the mother "A". The reason why the light guiding light is not performed in the area B is as follows. Even if the light emitted from the source 14 is opposite to the central axis of the light (the axis perpendicular to the light emitting surface of the light source 14 through the light source 14), the filial piedus expands on both sides, but because the light enters the light guide from the light incident end face 15 The surface which is refracted by the surface and the light, so that the light expands in the light guide panel 13 is an area which is extended by the angle of the center of the center of the center of the center by the angle of the edge of the center of the center of the light. The extension angle θ 曰 refractive index produces a critical angle equal to I, for example, if the guide t refraction > rate n is 159', according to the Snell's law, 0 = arcsin by this 'in the ratio of self-light and light entrance end The two ends of the pair of 15 are extended to the angle Θ Θ ' ' > ^ stretched each line segment is also in the outer area B, from the light plate 13 t, in preparation, the case 17 its knot 16 (example 丨 winning the standard - light 丨In the absence of the lighter, the light from the light source 14 is emitted from the light source 14 in the light of the light source 14 (the 1st). The alignment system is substantially a Lange distribution, so that the alignment of the light incident into the light guide panel 13 is also in the direction of the central axis of the light, and the light intensity is large, and the larger the angle is formed with the central axis of the light. In the direction, the light intensity is smaller. Therefore, even if the display area 丨6' is disposed so as not to overlap the area B where the light is not guided, the central portion of the display area 16 is brightly illuminated, but the both ends are darkened. In order to avoid these undesirable conditions, as shown in Fig. 3, the display area 16 can be sufficiently far away from the light source 14 and in the display area 1 6 The display area 16 is not disposed in such a manner as to overlap with the non-light-conducting area B. However, in this case, the size of the light guide panel 13 is also larger than the size of the display area 16. When the size of the light guide panel 13 is When the size is increased, the utilization efficiency of the light guide panel 13 is deteriorated, and the work of assembling the mobile device (especially the small plastic mobile device) becomes difficult. (An improved example of the planar light-emitting device) As described above, the unevenness of light distribution has been proposed as a planar light-emitting device which is processed on the light incident end surface of the light guide panel. Figs. 4 and 5 show an example of such a modified example. A schematic plan view of a modified example of the planar light-emitting device. Fig. 5 is a schematic cross-sectional view of the modified example, and is a cross-sectional view taken along line 4 of the line corresponding to the χ_χ line of Fig. 1. In this modified example, as the fourth As shown in the figure, a portion of the light incident surface 15 that is opposite to the light source 14 and that is curved in an arc shape when viewed from a direction perpendicular to the surface of the light guide panel 13 is provided. 4 in the position of the opposite direction, the arc is placed in the end face 15 5 At the time of the portion 18, the change in the traveling direction of the light before and after entering the light guide panel 13 is reduced to 2.6, and the spread of the light in the light guide panel 13 is widened as compared with the case where the flat light is incident on the end face 丨5. Therefore, according to the modified example, as shown in Fig. 5, the gap between the light emitting surface of the light source u and the light guiding panel i3 15 becomes larger. Therefore, light leakage from the light source 14 is less likely to enter the light guide panel 13. The amount of light that enters the light guide panel 13 due to the radiation of 14 is reduced, and the efficiency is lowered. Therefore, the display area 16 is entirely changed. After the darkness (Patent Document 1) Further, Patent Document 1 discloses a panel assembly as shown in the drawings. In the light-emitting panel assembly of Patent Document 1, the end face of the region 21 (the effective region for emitting light) is provided to expand the light from the light source 23 and input the light output β moving region 22, and in each light moving region. According to this configuration, as shown in Fig. 6, the two-point chain light moving region 24 and a light source 25 are formed to shorten the length of the light moving region 22. However, only with its source 23, in the area circled by the dotted line in Fig. 6, the area is made dark by the wheel. Therefore, it is necessary to have the width of the two light-adjusting output areas 21 become larger. The light $ has a manufacturing cost and a bad increase in power consumption. It is smaller, so that the light that enters the end face of the recessed portion of the recessed portion is light upward. This causes a problem of light utilization from the light source. The light-emitting surface shown in the light output area is provided with two light source arrangement light sources for the I domain 21, and compared with the case, any one of the light light cannot be transmitted. 23 (along with the aperture), therefore, 201229586 [Patent Document 1] Japanese Patent Application Publication No. 2002-53 No. 8577 (Section 7) [Problem to be Solved by the Invention] The present invention has been made in view of such technical problems, and an object thereof is to provide a borrowing By extending the alignment of the light incident, it is possible to expand the effective area, and the light use efficiency is not easily lowered, and the light distribution of the light distribution is highly controllable. [Means for Solving the Problem] The light guiding panel of the present invention expands the light of the light source into a planar shape by taking in light from the end surface, by providing at least one of the light emitting surface and the surface facing the light emitting surface. a light-conducting panel formed by diffusing or reflecting light, and emitting light from a predetermined area of the light-emitting surface toward the outside, characterized in that: near the region where the light of the light source is incident in the end surface, A light distribution pattern for expanding an alignment direction of the light to be guided light is provided on at least one of the light exit surface and the surface facing the light exit surface. The light guide panel of the present invention is attached to a region from which light from a light source is incident.
面板之角部或邊緣 區或有效區域整體 201229586 明亮地發光。而且，& _ 叩且，因為不需要使顯元 所以，不需要增大導光面板。另外， 個數，所以，可如庄丨丄 J抑制成本及消耗電力 本么明之導光面板的一個實施態 有複數個該配光控制圖案，該配光控 °玄圖案反射之光進行配光的方向，圍 面之軸呈傾斜狀地配置。根據該實施 控制圖案傾斜’可使以該配光控制圖 向變化’另外’藉由調整此傾斜（角方 之行進方向。 尤其是當從與該光射出面垂直之 著自光源射達之光的配光分布之中心 域與另一侧的區域中，藉由使該配光 反之朝向傾斜，可分別朝外彎曲反射 光面板内之配光分布。 另外，於此實施態樣中，從與該 向觀察時’相對於自光源射達之光丨 軸’若呈線對稱地配置該配光控制圖 擴展導光面板之配光分布。 又’於此實施態樣中，從與該光 觀察時’於自光源射達之光的光量多 配置该配光控制圖案，並在光量少之 置該配光控制圖案，藉此，可將導光 勻化’可減低亮度不勻。 :區等與光源分離， 不需要増加光源之 0 樣’其特徵為：具 制圖案係朝欲使以 繞垂直於該光射出 態樣’利用使配光 案所反射之光的方 【）’可控制反射光 方向觀察時，在隔 軸而設之一側的區 控制圖案朝互為相 光，進而可擴展導 光射出面垂直之方 々配光分布之中心 案，可左右均等地 射出面垂直之方向 之區域中以大密度 區域中以小密度配 面板之亮度分布均 201229586 本發明之導光面板的另一個實施態樣，其特徵為：該 配光控制圖案係該光射出面及與該光射出面對向之面當 中至少一面上所設置的三角棱鏡狀之凹部。根據該實施 態樣’能以配光控制圖案之各面中的位於離該端面（光射 入端面）較遠側之傾斜面（偏向反射面）使入射光反射，此 時能使光之導光方向變化，而不自光射出面射出，進一 步行進於導光面板内。 另外，於此實施態樣中’當設導光面板之構成樹脂 的臨界角（全反射之臨界角）為0C [。:I時’若將該配光控制 圖案之位於離該端面較遠側之傾斜面的傾斜角作成小於 9 0 ° - Θ c時（例如，導光面板之構成樹脂為聚碳酸酯樹脂的 情況，將配光控制圖案之位於離該端面較遠側之傾斜面 的傾斜角作成小於5 1 ° )，可使光不容易從配光控制圖案 朝外部漏光，可減小光量損失。 本發明之面狀發光裝置，係由光源與導光面板所構 成’且建構成將該光源之光自該導光面板之端面取入該 導光面板内並擴展成面狀，藉由設於該導光面板之光射 出面及與該光射出面對向之面當中至少一面上的擴散圖 案使光穿透或反射，而自該光射出面之既定區域朝該導 光面板之外部射出光的面狀發光裝置’其特徵為：於該光 源附近之區域’且於該導光面板之δ亥光射出面及與該光 射出面對向之面當中至少一面上設置用以對導光於導光 面板内之光的配向分布進行擴展之配光控制圖案。 本發明之面狀發光裝置，係於來自光源之光所射入 的區域附近’且於光射出面及與光射出面對向之面當中 -10- 201229586 至少一面上設 光控制圖案， 光面板内之光 面板内之光的 部或邊緣而予 區域整體明亮 光源分離，所 增加光源之個 本發明之 為：於設有該 之該光射出面 黏貼反射片。 之光的一部份 導光面板朝外 導光面板内， 反射片黏貼於 所以，可進一 另外，於 於該導光面板 反射片使朝偏 之光源的光反 之利用效率， 又’用以 上說明之構成 根據上述構成 置用以擴展進行導光之光的配向方向之配 所以’能以配光控制圖案使自光源射入導 的一部份反射’藉此，可擴展導光於導光 範圍°藉此，可將光輸送至導光面板之角 ”、、7C，可使設有擴散圖案之顯示區或有效 地發光。而且，因為不需要使顯示區等與 以，不需要增大導光面板。另外，不需要 數’所以’可抑制成本及消耗電力。 面狀發光裝置的一個貫施態樣，其特徵 配光控制圖案之區域中，且於該導光面板 及與該光射出面對向之面當中至少一面上 根據該實施態樣，在以配光控制圖案反射 朝與光射出面大致垂直的方向行進而欲自 部漏光時，能以反射片使此光反射而返回 可減低光量損失。另外，於以黏著劑等將 導光面板時’光線因黏著劑而進行散射， 步提高擴展配光分布之效果。 5玄實施態樣中’在將δ亥反射片進一步覆罢 與該光源之間的間隙部份的情況下，能以 離導光面板之端面的方向射出而成為無用 射，而使該光射入導光面板内，可提高光 提高導光面板之亮度。 解決本發明之該課題之手段，係具有將以 要素適宜地組合而成的特徵，本發明係可 要素之組合而作各種之變化。 201229586 【實施方式】 以下，一面參照圖面，一面針對本發明之較佳實施 形態進行說明β但是，本發明不受以下之實施形態所限 制’只要在未超出本發明之實質範圍内，即可作各種設 計及變更。 (第1實施形態） 本發明之導光面板係使用於面狀發光裝置。面狀發 光裴置係將自光源放射之光導入導光板内，且將射入導 光板内之光擴屐成面狀而自光射出面的既定區域射出。 此種面狀發光裝置係可組裝於例如行動電話等之移動裝 置上，而被利用於照明用或顯示用。 、第7圖為示意地顯示本發明之第1實施形態之面狀 :光裝置3 1的俯視圖，其顯示發光時之狀態。第8圖為 :第7圖中之Y-Y線所作的剖視圖。如第7及第8圖所 :，於面狀發光裝置31中，導光面板33被重疊配置於 二位之表面•與導光面才反33之光射入端面35對向 的位置處’於基板32上安裝有光源心 光源34係比井M、， , . . H 、入鳊面35之寬度小的所謂點狀光 度）之冷陰極射線管等射入端Φ 35之寬度相等的寬度（長 源，於透明封裝樹心般1吏用之光源34為光 34a，且除了透明封货士有一個或複數個led晶片 以白色樹脂覆被。：二脂之前面(光放射面)以外，全部 以大致郎伯分布之；：免LED晶片34"夺，自光放块面 係以較小之間隙C射出白色光或有色光。光源34 、九射入端面35對向、或者抵接於光 201229586 射％面3 5。自光源3 4放射之光，係從與光射入端面 35中與光源34之前面對向的區域（光射入區域39)射入 導光面板33内。 ‘光面板3 3係由折射率大之透光性樹脂、例如聚碳 酸酯樹脂、丙烯酸樹脂或聚甲基丙烯酸曱酯樹脂（pMMA) 等形成為矩形之板狀或片狀。於導光面板33之背面分別 設有複數個擴散圖案37及配光控制圖案38。又，亦可 於基板32之表面中與導光面板33的背面對向之區域， 塗布白色塗料 '或者塗布白色樹脂、或者形成金屬薄膜 而形成光反射層。 擴散圖案37係藉由對導光於導光面板33内之光進 行反射或全反射而使光從導光面板33之表面（光射出面 4〇)射出者。擴散圖案37係可設於導光面板33之有效區 域的大致整個區域、或者亦可僅設於顯示所需之文字、 標記、圖案等之顯示區36。於將擴散圖案37設於有效 區域的大致整個區域的袢 ., 4的If況下，光射出面4〇之整個有效 區域進行發光，所以，可胺二& , 了將面狀發光裝置3 1利用於背光 等之照明用。另外’於僅在 、 值在既疋的顯不區3 6設置擴散圖 案37的情況下，則可利 J W用於顯不用。於圖示例中，主要 顯示用於顯示用之愔況，舶_ r，， 、間况，顯不區36顯示文字「A」。以下， 針對用於顯示用之情況淮广 頃况進仃說明，但並非意味排除用於 照明用之情況。 擴散圖案3 7係形成於 如第9(A)圖所示’—個擴散 狀。反射面37a係用以使導 導光面板33之背面的凹部， 圖案37具有三角稜鏡狀之形 光於導光面板33内之光進行 201229586 面35側。如第9(B)圖所 &定為使進行全反射之光 全反射的面’其朝向光射入端 示，反射面37a之傾斜角α倍 朝向與光射出面40大致垂直的方向而自光射出面利朝 外部射出的角纟’傾斜角α約為45。。擴散圖案37之背 面37b的傾斜角β係90。或略Qn〇 , Λ Λ ώ . ^ \兮tL· 9〇〇小之角度。未破反射 面37a全反射而穿過反射而π。 v ^ t 町由37a之光，係穿過背面37b 再射入導光面板3 3内而被再利用。 又，擴散圖案37係亦可形成為第9圖所示之形狀以 外的各種形狀。擴散圖案37只要是以反射面37a使光進 行全反射並自光射出面40射出者即可，所以，背面3几 的傾斜角可為任意之角度。例如，於第1〇(A)及第i〇(b) 圖所示之擴散圖案37中，背面37b之傾斜角係與反射面 37a之傾斜角相等(亦即’ ρ = α)，其戴面形狀成為二等邊 三角形。 另外，擴散圖案37亦可為整體彎曲且反射面37a被 f曲成凹面狀者或被彎曲成凸面狀者。另外，擴散圖案 37亦可為三角錐圖案、θ角錐（稜錐體形）圖案、大致圓 錐狀圖案。另夕卜’擴散圖帛37亦可為印刷於導光面板 33之背面的白色之光擴散油墨等。 配光控制圖案38係用以擴展自光射入區域39射入 導光面板33内之光的配向分布者，是在光射入區域39 ^附近被設於導光面板33之背面。配光控制圖案38亦 疋形成於導光面板33之背面的凹部，如第η(Α)圖所 示，一個配光控制圖案38具有三角稜鏡狀之形狀。配光 控制圖案38之偏向反射面38a係藉由使射入導光面板 -14- 201229586 33内之光進行全反射，而從與光射出面々ο垂直之方向 觀察時在反射前後以使光的行進方向變化者。偏向反射 面3 8 a之傾斜角ε越大，則使反射之光的配向發生變化 的效果越大’但光卻變得不容易射入偏向反射面38a。 等尤於導光面板33内之光中的對導光面板33之表 面或背面（不是配光控制圖案3 8的部份）以比全反射之臨 界角ec[。]小之入射角射入之光，會從導光面板之表 面或背面漏光至外部。藉此，導光於導光面板33内之光 的展開|巳圍，係'在與$光面板3 3之表面及光射入端面 35垂直的截面内，以垂直於光射入端面35之方向為中 、朝表面側及背面側分別成為“ 9〇。臨界角，。藉 此’‘在配光控制圖案38之偏向反射面38a的傾斜角s大 90。-臨界角ec”的情況下’變得光完全無法射入偏 二：射面38a’所以’為了使光射入偏向反射面…而在 ‘‘仃全反射’需要將偏向反射面38a的傾斜角ε作成 90。-臨界角ec，、 “作成 盘！ r 导九面板3 3之折射逛 為159(聚碳酸酯樹脂 39。，所以，^ ,斤射羊）的障况下，臨界角ec為 導光於導光面板33内之光的朝北 開範圍成為51W_39。)^ 面側之展 傾斜肖ε Ay。 ）此右偏向反射面38a的 斜角ε為51。以下時’即可 先進行全反射。另外， 等先面板33内之 烯酸樹脂之折射率）的产况下台之折射率為U9(丙 導光於導光面板3;的：況下，臨界角…2。，所以， 4r〇 内之光的朝背面側之展Η鈴is 48〇( = 90〇.42°) 〇 Μ,,— 两 W I 展開 h 圍成為 48。以下時_曰 右偏向反射面38a的傾斜角 下時，即可使導光於導光面板33内之2角為 n <光進行全反 201229586 方面*偏向反射面3 8 a的傾斜角ε變小時， 光變得容易照射於偏向反射面川，但卻會相應減少相 t於該部份之使光偏向的效果，所以，當傾斜角ε過小 ,^ ^ _藉此，最佳之傾斜角ε的值係藉 由貝驗或者採用模擬所決定。 Γ光控制圖案38之前面38b係朝向光射入端面35 側’刖面3 8 b之傾斜 > 貝斜角γ係90。或略比90。小之角度。當 月丨j面 3 8 b之高择古口主 , ^ 又问夺’光容易照射於前面38b，使得光 '° 38b而朝導光面板33之外面漏光，造成光量損 失，所以以前面38b之高度低者較為適宜。 4第7及第12圖所示，從垂直於光射出面40之方 ^ ^察#配光控制圖帛3 8係配置為將光源34之發光 :轴T作為中心而呈線對稱，並相對於發光中心轴T '區域與另一側之區域朝互為相反朝向傾斜的方 -置亦即’於第7圖中，在發光中心軸τ之右側區 域’各配光控制圖案38係圍繞垂直於光射出® 40之軸 而自發光中心輛Τ順時針旋轉角度Φ(>0)，在發光中心 :τ之左側區域，各配光控制圖案38係圍繞垂直於光射 之轴而自發光中心轴τ逆時針旋轉角度中（〉〇)所 藉此，當自光射入區域39射入導光面板33内之 =配光控制圖案38時，或者當射入導光面板”内 之光在導光以Mi 控制圖案 亲 圖所不，在右側之配光控制圖 向反…8a進行全反射之光朝右侧方向折 側之配光控制圖案38之偏向反射面38a進行全 201229586 反射之光朝左側方向折彎。其社 案38擴展配光分布，、、、、。果’可藉由配光控制圖 進行光之導光的區域B之區無域配光控制圖案38時成為不 第7圖所示，使得不進行光 亦可進行光之導光，如 在與發光中心軸τ形成較大二？區域B變小。另外’ 導光，可使得導光面板33 C向上亦進行光之 如筮7 碎- .A4r , 儿度達成均勻化。藉此， 如第7圖所不，可在整個顯示區 當設立於偏向反射面38 仃卷光。 圖所示’從垂直於光射出面4q^線為料’如第12 圖案38之傾角φ係可定義為法^方向觀察時，配光控制 ^ ^ ^ 古線和與發光中心軸T平行 之方向所形成之角度。此傾角 36之區域等的基礎上，藉由實：：在考慮到設有顯示區 .. 貫驗或模擬來確定最適當之 值。 另外，配光控制圖案3 8夕_ ,, 杀Μ之配置（分布）或密度’亦可 在考慮到光之整體之配光分布的基礎上來確定。然而， 這些之配光控制圖案38係遮蔽或妨礙正常進行導光之 光，所以，當較多地設詈^ 平夕又1配先控制圖案38時，恐有產生 光量降低之擔憂。藉此，配光控制圖㈣係需要以其形 狀、尺寸、密度等成為最佳之方式進行設計。導光於導 光面板33内之所有光，並非說—定會全被擴散圖案μ 所反射而利用於發光顯示，所以，只要以最佳化方式設 計配光控制圖案38的話’即使光受到配光控制圖案38 之妨礙，亦不會對面狀發光裝置31帶來較大之效率降 低》反而是被擴展成廣範圍之光，會更多地被利用於顯 不區36之顯示，從而可提高光之利用效率，提高整體之 亮度效率。 -17- 201229586The corner or edge area of the panel or the effective area as a whole 201229586 shines brightly. Moreover, & _, and because there is no need to make the illuminant, there is no need to increase the light guide panel. In addition, the number is such that, as in the implementation of the light-conducting panel of the present invention, there is a plurality of light distribution control patterns, and the light distribution control light reflects the light. In the direction, the axis of the surrounding surface is arranged in an inclined shape. Controlling the pattern tilt ' according to the implementation may cause the light distribution control pattern to change 'other' by adjusting the tilt (the direction of travel of the corners. Especially when light is emitted from the light source perpendicular to the light exit surface) In the central region of the light distribution and the region on the other side, the light distribution in the reflective light panel can be bent outward by bending the light distribution in the opposite direction. In addition, in this embodiment, In the observation, the distribution of the light distribution of the light guide panel is arranged in line symmetry with respect to the pupil axis of the light source. In this embodiment, the light is observed from the light. When the amount of light emitted from the light source is multiplied, the light distribution control pattern is disposed, and the light distribution control pattern is placed in a small amount of light, whereby the light guide can be homogenized to reduce unevenness of brightness. Separating from the light source, there is no need to add a source of light. The characteristic is that the pattern is designed to be controlled so as to be perpendicular to the light exiting state by using the square [] of the light reflected by the light distribution case. When viewed in the direction of reflected light, it is set on the side of the shaft. The area control pattern on one side is phase-to-phase with each other, and the center of the light distribution of the square light perpendicular to the light-emitting exit surface can be expanded, and the area of the vertical direction of the exit surface can be uniformly distributed in a large density area in a large-density area. The brightness distribution of the panel is 201229586. Another embodiment of the light guiding panel of the present invention is characterized in that the light distribution control pattern is disposed on at least one of the light exiting surface and the surface facing the light emitting surface. A triangular prism-shaped recess. According to this embodiment, the incident light can be reflected by the inclined surface (biased reflecting surface) located on the far side of the end surface (light incident end surface) of each surface of the light distribution control pattern, and the light guide can be made at this time. The light direction changes without being emitted from the light exit surface, and further travels inside the light guide panel. Further, in this embodiment, the critical angle (the critical angle of total reflection) of the constituent resin of the light guiding panel is set to 0C [. :I: 'If the inclination angle of the inclined surface of the light distribution control pattern located on the far side from the end surface is less than 90 ° - Θ c (for example, the resin of the light guide panel is polycarbonate resin) The inclination angle of the inclined surface of the light distribution control pattern located on the far side from the end surface is made smaller than 5 1 °, so that light is not easily leaked from the light distribution control pattern to the outside, and the amount of light loss can be reduced. The planar light-emitting device of the present invention is constructed by a light source and a light guide panel, and is configured to take light from the light source into the light guide panel from an end surface of the light guide panel and expand into a planar shape. a diffusing pattern on at least one of a light exit surface of the light guide panel and a surface facing the light emitting surface transmits or reflects light, and emits light from a predetermined area of the light exit surface toward the outside of the light guide panel The planar light-emitting device is characterized in that: a region in the vicinity of the light source is disposed on at least one of a surface of the light-emitting panel and a surface opposite to the light-emitting surface for guiding light The light distribution control pattern of the light distribution in the light guide panel is expanded. The planar light-emitting device of the present invention is disposed near the region from which the light from the light source enters, and is provided with a light control pattern on at least one side of the light exit surface and the light-emitting surface -10-201229586, the light panel The portion or edge of the light in the inner light panel is separated from the bright light source of the entire area. The light source of the present invention is characterized in that the light exit surface is provided with the reflective sheet. a part of the light guiding panel is directed to the outer light guiding panel, and the reflecting sheet is adhered to the light reflecting panel, so that the light guiding panel of the light guiding panel makes the light of the light source facing away from the light source use efficiency, and the above description is used. According to the configuration described above, the alignment direction of the light for guiding the light is expanded, so that a portion of the light source can be reflected by the light distribution control pattern, thereby expanding the light guiding range. Thereby, the light can be transported to the corners of the light guide panel, 7C, and the display area provided with the diffusion pattern can be efficiently illuminated. Moreover, since it is not necessary to make the display area and the like, it is not necessary to increase the guide. In addition, there is no need for a number 'so' to suppress cost and power consumption. One aspect of the planar light-emitting device is characterized in that it is in the region of the light distribution control pattern, and is emitted from the light guide panel and the light. According to this embodiment, at least one of the faces facing the surface can be reflected by the reflection sheet to return light when the light distribution control pattern is reflected in a direction substantially perpendicular to the light exit surface. In addition, when the light guide panel is adhered with an adhesive or the like, the light is scattered by the adhesive, and the effect of expanding the light distribution is improved. 5 In the embodiment, the δ hai reflection sheet is further covered. When the gap portion between the light source and the light source is blocked, the light can be emitted in a direction away from the end surface of the light guide panel, and the light can be incident into the light guide panel, thereby improving the brightness of the light guide panel by increasing the light. The means for solving the problem of the present invention has a feature in which elements are appropriately combined, and the present invention is variously changed in combination with elements. 201229586 [Embodiment] Hereinafter, with reference to the drawings, BEST MODE FOR CARRYING OUT THE INVENTION The present invention is not limited to the following embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention. The light guide panel is used for a planar light-emitting device, and the planar light-emitting device introduces light emitted from the light source into the light guide plate, and expands the light incident into the light guide plate into a surface. The predetermined area of the light exiting surface is emitted. The planar light emitting device can be incorporated into a mobile device such as a mobile phone, and used for illumination or display. FIG. 7 is a schematic view showing the present invention. The surface of the first embodiment: a plan view of the optical device 3 1 showing a state of light emission. Fig. 8 is a cross-sectional view taken along line YY of Fig. 7. As shown in Figs. 7 and 8 In the light-emitting device 31, the light guide panel 33 is superposed on the surface of the two places, and the light source core light source 34 is mounted on the substrate 32 at a position opposite to the light incident surface 35 opposite to the light guide surface. The width of the injection end Φ 35 of the cold cathode ray tube, such as the well M, , , . . . , H, which has a small width of the entrance pupil surface 35, is equal in width (long source, 1 inch in the transparent package) The light source 34 is light 34a, and one or more of the LED wafers are covered with a white resin in addition to the transparent sealer. : In addition to the front surface of the bismuth (light emitting surface), all of them are distributed in a rough manner; the LED chip 34" is free from light, and the white light or colored light is emitted from the small gap C. The light source 34 and the nine incident end faces 35 oppose each other or abut against the light 201229586. The light radiated from the light source 34 is incident into the light guide panel 33 from a region (light incident region 39) facing the light source 34 in the light incident end surface 35. The optical panel 3 3 is formed into a rectangular plate shape or a sheet shape from a light transmissive resin having a large refractive index, for example, a polycarbonate resin, an acrylic resin, or a polymethyl methacrylate resin (pMMA). A plurality of diffusion patterns 37 and a light distribution control pattern 38 are respectively disposed on the back surface of the light guide panel 33. Further, a white paint "or a white resin or a metal thin film may be applied to a region of the surface of the substrate 32 that faces the back surface of the light guide panel 33 to form a light-reflecting layer. The diffusion pattern 37 emits light from the surface (light exit surface 4) of the light guide panel 33 by reflecting or totally reflecting the light guided in the light guide panel 33. The diffusion pattern 37 may be provided in substantially the entire area of the effective area of the light guide panel 33, or may be provided only in the display area 36 for displaying characters, marks, patterns, and the like required. When the diffusion pattern 37 is provided in substantially the entire region of the effective region, the entire effective region of the light exit surface 4 进行 emits light in the case of If. 4, so that the luminescent device 3 can be used. 1Used for lighting such as backlights. In addition, in the case where the diffusion pattern 37 is set only in the display area 36 where the value is in the vicinity, the profit can be used. In the example of the figure, the main display is for the display, the ship_r,, and the condition, and the display area 36 displays the character "A". In the following, the description will be given for the case of display, but it is not intended to exclude the use for lighting. The diffusion pattern 3 7 is formed in a diffusion shape as shown in Fig. 9(A). The reflecting surface 37a is a recess for guiding the back surface of the light panel 33, and the pattern 37 has a triangular shape and the light in the light guiding panel 33 is on the side of the surface of the surface of the 201229586. As shown in Fig. 9(B), the surface "to be totally reflected by the total reflection" is oriented toward the light incident end, and the inclination angle α of the reflection surface 37a is directed to a direction substantially perpendicular to the light exit surface 40. The angle α 'inclination angle α emitted from the light exit surface to the outside is about 45. . The inclination angle β of the back surface 37b of the diffusion pattern 37 is 90. Or slightly Qn〇, Λ Λ ώ . ^ \兮tL· 9 〇〇 small angle. The unbroken reflecting surface 37a is totally reflected and passes through the reflection π. The light from 37a is passed through the back surface 37b and injected into the light guide panel 3 3 to be reused. Further, the diffusion pattern 37 may be formed into various shapes other than the shape shown in Fig. 9. The diffusion pattern 37 only needs to be totally reflected by the reflection surface 37a and emitted from the light exit surface 40. Therefore, the inclination angle of the back surface 3 can be an arbitrary angle. For example, in the diffusion pattern 37 shown in the first (A) and the second (b), the inclination angle of the back surface 37b is equal to the inclination angle of the reflection surface 37a (that is, 'ρ = α), which is worn. The face shape becomes a equilateral triangle. Further, the diffusion pattern 37 may be curved as a whole and the reflecting surface 37a may be curved into a concave shape or curved into a convex shape. Further, the diffusion pattern 37 may be a triangular pyramid pattern, an θ pyramid (pyramid) pattern, or a substantially circular pyramid pattern. Further, the diffusion pattern 37 may be a white light-diffusing ink or the like printed on the back surface of the light guide panel 33. The light distribution control pattern 38 is an alignment distributor for expanding light incident on the light guide panel 33 from the light incident region 39, and is provided on the back surface of the light guide panel 33 in the vicinity of the light incident region 39^. The light distribution control pattern 38 is also formed in a concave portion on the back surface of the light guide panel 33. As shown in the η (Α) diagram, one light distribution control pattern 38 has a triangular shape. The deflecting surface 38a of the light distribution control pattern 38 is totally reflected by the light incident into the light guiding panel-14-201229586 33, and is reflected before and after the reflection from the direction perpendicular to the light exiting surface 々ο. The direction of travel changes. The larger the inclination angle ε of the deflecting surface 38 8 a, the greater the effect of changing the alignment of the reflected light. However, the light does not easily enter the deflecting surface 38a. The surface or the back surface of the light guiding panel 33 (not the portion of the light distribution control pattern 38) among the light in the light guiding panel 33 is equal to the critical angle ec[ of the total reflection. The light incident at a small incident angle leaks light from the surface or the back of the light guide panel to the outside. Thereby, the unfolding of the light guided in the light guide panel 33 is in a section perpendicular to the surface of the light panel 33 and the light incident end surface 35 so as to be perpendicular to the light incident end surface 35. The direction of the middle, the front side, and the back side are respectively "9 〇. The critical angle, by which the inclination angle s of the deflecting surface 38a of the light distribution control pattern 38 is 90. - the critical angle ec" It is necessary to make the inclination angle ε of the deflecting reflection surface 38a 90 in order to make the light enter the deflecting surface. - Critical angle ec, "Make a plate! r Guide nine panel 3 3 refraction wandering for 159 (polycarbonate resin 39., so, ^, kg shot sheep), the critical angle ec is the light guide The northward opening range of the light in the light panel 33 is 51W_39.) The surface tilting angle ε y of the surface side is 51. The oblique angle ε of the right deflecting surface 38a is 51. When it is below, the total reflection can be performed first. , such as the refractive index of the olefinic resin in the front panel 33), the refractive index of the lower stage is U9 (the light is guided by the light guide panel 3; in the case of the critical angle ... 2, therefore, within 4r The light on the back side of the bell is 48 〇 (= 90 〇.42 °) 〇Μ,, — two WI expansion h encircle becomes 48. When 曰 曰 right to the angle of inclination of the reflective surface 38a, then The two angles of the light guiding in the light guiding panel 33 are n < the light is all reversed 201229586; the inclination angle ε of the deflecting surface 3 8 a becomes small, and the light is easily irradiated to the deflecting surface, but Correspondingly reduce the effect of the phase t on the light deflection, so when the tilt angle ε is too small, ^ ^ _ thereby, the value of the optimal tilt angle ε is determined by The front surface 38b of the calender control pattern 38 is directed toward the side of the light incident end face 35. The tilt of the face 3 8 b is 贝 贝 贝 γ γ γ 贝 贝 贝 贝 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略 略j face 3 8 b high choice of the ancient mouth master, ^ also asked to win the light easily on the front 38b, so that the light '° 38b and light leakage outside the light guide panel 33, causing loss of light, so the height of the front 38b is lower 4 is shown in Fig. 7 and Fig. 12, from the direction perpendicular to the light exit surface 40, the light distribution control map 配置38 is arranged to illuminate the light source 34 with the axis T as the center. And in the opposite direction of the light-emitting central axis T′ region and the other side, the opposite sides are inclined toward each other, that is, in the right side region of the light-emitting central axis τ, each light distribution control pattern 38 Rotating the angle Φ (>0) clockwise around the axis perpendicular to the light exiting axis 40, and in the left side of the illuminating center: τ, each light distribution control pattern 38 surrounds the axis perpendicular to the light. And the self-illuminating center axis τ is rotated counterclockwise (〉〇), and is incident from the light incident region 39. In the light panel 33, when the light distribution control pattern 38 is used, or when the light incident into the light guide panel is controlled by the Mi control pattern, the light distribution control map on the right side is totally reflected to the reverse 8a. The light is deflected toward the left side by the deflecting surface 38a of the light distribution control pattern 38 on the side of the right side of the light distribution control pattern 38. The social case 38 expands the light distribution, and the image can be used by When the light distribution control map performs the light distribution control pattern 38 in the region B of the light guided light, it is not shown in Fig. 7, so that light can be guided without light, for example, with the light emission center axis τ. Bigger two? Area B becomes smaller. In addition, the light guide can make the light guide panel 33 C upward as well as the light-breaking - A4r, and the degree of uniformity is achieved. Thereby, as shown in Fig. 7, the light can be rolled up on the deflecting surface 38 in the entire display area. As shown in the figure, 'from the line perpendicular to the light exit surface 4q^ as the material', the inclination angle φ of the 12th pattern 38 can be defined as the direction of the law, and the light distribution control ^ ^ ^ ancient line is parallel to the central axis T of the illumination. The angle formed by the direction. Based on the area of the dip angle 36, etc., by using:: Considering the display area or the simulation to determine the most appropriate value. Further, the light distribution control pattern 3, the configuration (distribution) or density of the killing can also be determined in consideration of the light distribution of the light as a whole. However, since these light distribution control patterns 38 shield or hinder the light that normally conducts light, there is a fear that the amount of light is lowered when a large number of devices are provided. Therefore, the light distribution control map (4) needs to be designed in such a manner that its shape, size, density, and the like are optimal. All of the light guided in the light guide panel 33 is not necessarily reflected by the diffusion pattern μ and is used for the light-emitting display. Therefore, if the light distribution control pattern 38 is designed in an optimized manner, even if the light is matched The hindrance of the light control pattern 38 does not cause a large efficiency reduction to the planar light-emitting device 31. Instead, it is expanded into a wide range of light, which is more utilized for the display of the display area 36, thereby improving The efficiency of light utilization improves the overall brightness efficiency. -17- 201229586
又’配光控制圖案3 8不限於是具有第11圖所示之 平坦的偏！^ C 门反射面38a者，如第14(A)圖所示，偏向反射 面 38a 亦 4*、& . 成為凸曲面，或者’如第14(B)圖所示，偏向 反射面38a亦可成為凹曲面。在偏向反射面38a成為凸 曲面之配光控制圖案38中，可使由偏向反射面38a所反 射之光進行擴散，在偏向反射面38a成為凹曲面之配光 控制圖案38中’可使由偏向反射面38a所反射之光具有 聚光性。另外，亦可使偏向反射面38a為平坦之配光控 制圖案38、偏向反射面38a為凸曲面之配光控制圖案 3 8、偏向反射面3 8a為凹曲面之配光控制圖案3 8混合利 用。 其次’針對藉由模擬對配光控制圖案3 8進行驗證所 付之結果進行說明。第15及第16圖顯示用於模擬之面 狀發光農置的模型。如第16圖所示’光源34係以光放 射面之寬度c為l_8mm，與光射入端面35之間間隔 f=〇_2mm之間隙的方式所配置。光源34係作成藉由藍色 LED與（黃色）螢光體之組合而發出白色光的led光源， 且自光源3 4放射郎伯分布之光。配光控制圖案3 $係於 縱向a=lmm、橫寬b = 2mm的區域内，以〇 lmm之間隔（中 心間距離）配置200個。配光控制圖案3 8係以發光中心 軸T為中心而呈線對稱配置，配光控制圖案38之傾角亦 相對於發光中心軸τ而呈線對稱。一個配光控制圖案38 係於俯視時具有d = 3(^m的長度、及ε=106μιη的寬度， 且將偏向反射面3 8a之傾斜角ε作成45。。另外，任一 之配光控制圖案3 8均以相等之角度φ = 3 8。傾斜。 201229586 導光面板3 3係準備於背面既不設置擴散圖案3 7、 亦不設置配光控制圖案3 8者、及僅設置配光控制圖案 38者。另外，導光面板33之折射率為1.59(聚碳酸酯樹 脂之折射率）。任一之導光面板3 3均不具有擴散圖案 37’所以，導光於導光面板33内之光不會從光射出面 40射出’而是射達光射入端面3 5之相反側的端面。如 第15(A)及15(B)圖所示’沿與導光面板33之光射入端 面3 5為相反側的端面設置光量測量裝置4 1，藉由測量 射入光量測量裝置41之各位置的光的受光強度，求取各 方向上之光的強度（配光分布）。如第15(A)圖所示，光量 測量裝置4 1係配置成相對於與發光中心軸τ平行之方向 (θ = 0°)，可在從配光方向0 = -65。至θ = _65。的範圍内進行 測量。 第17圖顯示使用於背面既不設置擴散圖案3 7、亦 不設置配光控制圖案38的導光面板33，以光量測量裝 置4i對在導光面板33内被朝各方向導光之光的強度（發 光強度）進行測量所得之結果。第1 7圖之橫軸表示以發 光中心轴T為基準之角度（配光方向e)，縱軸表示各配光 方向Θ之發光強度。從第丨7圖之曲線可知，於未設置配 光控制圖案38之情況下’於導光面板33内，光源34 正前方的發光強度最大，從配光方向卜士 ] s。走4 W i b處起，發光 強度降低，在與臨界角相等之配光方仓Α — ^々向θ —±3 9。附近，發 光強度接近於零。又，在比臨界角女夕阳止+ 天 β人之配九方向（|θ|> 39。）’發光強度亦不成為零之理由，可去声a m 可考慮是因為導光 面板33内之光的散射或暈光等的因素。 -19- 201229586 第1 8圖為顯示使用於背面設置有配光控制圖案3 8 之導光面板33時之亮度變化率的圖。配光方向Θ之亮度 變化率係指（使用設置有配光控制圖案3 8之導光面板3 3 時的配光方向Θ之發光亮度）+ (使用不具有配光控制圖 案38之導光面板33時的相同配光方向θ之發光亮度）。 第1 8圖顯示在比配光控制圖案3 8之傾角Φ還小的配光方 向（IΘ丨< φ = 3 8。），亮度變化率約為1，但在比配光控制圖 案38之傾角φ還大的配光方向（|θ|>φ = 38。），亮度變化率 成為遠大於1之值。由此可知，藉由設置配光控制圖案 3 8 ’可擴展配光分布，可在比配光控制圖案3 8之傾角φ 還大的配光方向進行光之導光。 (第2實施形態） 其次，針對本發明之第2實施形態之面狀發光裝置 51進行說明，但有關與第1實施形態相同之構成部份， 則省略說明。第1 9圖為示意地顯示第2實施形態之面狀 發光裝置51的俯視圖。另外，第2〇(Α)圖為第2實施形 態之面狀發光裝置的概略剖視圖，第2〇(Β)圖為第2〇(Α) 圖之面狀發光裝置的局部放大圖。 第2實施形態之面狀發光裝置5丨，係於第1實施形 悲之面狀發光裝置中，進—步以覆蓋光源34及配光控制 圖案形成區域之方式’於光源34及導光面板33的上面 黏著遮光帶52。遮光帶52係於吸收光之黑色片材53的 下面積層由反射光之白色片材或反射鏡片所構成之反射 片54，並於反射片54之下面黏貼雙面黏著膠帶55而成 者。遮光帶52係藉由雙面黏著膠帶55而被黏著於光源 34及導光面板33的上面。 -20- 201229586 根據此種面狀發光裝置51’藉由射片54對不從光 源34直接射入光射入端面35而欲從光源34與光射入端 面3 5之間的間隙朝上方漏出之光進行反射，可使該光從 光射入端面35射入導光面板33内。藉此，可減低不射 入導光面板3 3内而降低光利用效率之原因所造成的損 失光，可提高面狀發光裝置51之亮度效率。 另外’在與配光控制圖案3 8對向之位置黏貼有反射 片54 ’所以，可防止由配光控制圖案38所反射之光從 光射出面40的漏出，可降低光量之減少。 又’射入導光面板33内之光，在導光面板33的上 面藉由反射片54及雙面黏著膠帶55進行散射反射，所 以’可進一步使配光分布均勻化。 又，配光控制圖案38係除了第丨丨及第14圖所示之 形狀以外，還可為各種之形狀。例如，亦可像第21(A) 及（B)圖所示之配光控制圖案38那樣，前面3礼之傾斜 角與偏向反射面38a的傾斜角相等（亦即，γ = ε)，截面形 狀為二等邊三角形。於截面為二等邊三角形之配光控制 圖案38巾如帛22(A)圖所示，亦可使整體彎曲而使偏 向反射面3 8 a ’弯曲成凸曲而此 , 風凸曲面狀，如苐22(B)圖所示，亦可 使整體彎曲而使偏向反射面H吨 久对面38a彎曲成凹曲面狀。若使 偏向反射面38a彎曲成凸曲 成凸曲面狀時，可使由偏向反射面 38a所反射之光進一步擴散 ^ ^另外，若使偏向反射面38a 彎曲成凹曲面狀’則可使由值 文Φ偏向反射面3 8a所反射之光 進行聚光。 21- 201229586 另外’如第23(A)〜（D)圖所示’配光控制圖案38 亦可為鋸齒形圖案、三角錐圖案、四角錐（稜錐體形）圖 案、大致圓錐狀圖案等。另外，亦可使這些之各種配光 控制圖案3 8混合。 (其他之實施形態） 配光控制圖案3 8係除了在第i實施形態所作之說明 以外，還可為各種之配置，藉此，可更為精密地控制配 光分布。又，於第24〜第28圖中，將設於導光面板33 之背面的配光控制圖案顯示於導光面板33的表面。另一 方面’圖中省略擴散圖案37之圖示。 一般而s ’像第24(A)圖之面狀發光裝置61那樣， 以使光源34與導光面板33之中央對向地配置，配光控 制圖案38亦相對於光源34之發光中心軸而左右對稱地 設置，以使光在導光面板3 3之左右均勻地進行配向較為 適且。但是，在顯示區3 6為左右不對稱之情況、或者設 於偏離導光面板33之中央部的位置之情況等，亦可像第 24(B)圖之面狀發光裝置62那樣，於偏離導光面板33之 中央的位置設置光源3 4及配光控制圖案3 8，相對於光 源3 4之發光中心軸呈左右對稱地設置配光控制圖案3 8。 另外，配光控制圖案3 8亦可像第25(A)圖之面狀發 光裝置6 3那樣，均勻地分布於配光控制圖案形成區威 中，但亦可像第25(B)圖之面狀發光裝置64那樣作隨機 分布。 另外’配光控制圖案3 8亦可像第2 6圖之面狀發光 裝置65那樣’在自光源34所導光之光量多的區域（亦 -22- 201229586 即，與光源34之發光中心軸形成較小之角度的區域）， 增大配光控制圖案38之密度’在光量少的區域（亦即， 與光源34之發光中心軸形成較大之角度的區域），減小 配光控制圖案3 8之密度。根據此種配置，可使光量多之 方向的光更大範圍地擴散’可減少光量少之方向的光擴 散，所以，可在導光面板3 3整體使光量均勻化。 另外，配光控制圖案38亦可像第27圖之面狀發光 裝置66那樣，根據位置以使傾角（φ)不同。 另外，配光控制圖案38亦可像第28(A)圖之面狀發 光裝置67、第28(B)圖之面狀發光裝置68那樣，於光源 34之發光中心軸的一侧亦混合傾角不同者。具體而言， 於第28(A)圖所示之面狀發光裝置67中，於每一行使配 光控制圖案38之旋轉方向反向’於第2 8(B)圖所示之面 狀發光裝置68中，於每一列使配光控制圖案38之旋轉 方向反向。 另外，配光控制圖案38亦可不是形成在與導光面板 33之光射出面40的相反側的面，而是形成在與光射出 面40相同的面。同樣，擴散圖案37亦可形成於光射出 面40，以使在擴散圖案37被進行散射而穿透之光從光 射出面40射出。 於本發明中，藉由這些之配光控制圖案38、或這些 之配光控制圖案3 8的組合，可精密地控制導光面板3 3 内之配光分布。 另外，於導光面板3 3之寬度寬之情況下，亦可使用 複數個光源34，於各光源34之附近分別配置配光控制 圖案38。 -23- 201229586 【圖式簡單說明】 第1圖為示意地顯示習知之面狀發光裝置之俯視 圖。 第2圖為沿第1圖中之X-X線所作的概略剖視圖。 第3圖為顯示光源已自顯示區離開後的面狀發光裝 置之俯視圖。 第4圖為顯示面光源裝置之改良例的俯視圖。 第5圖為第4圖之面光源裝置之概略剖視圖。 第6圖為專利文獻1所揭示之發光面板模組的說明 圖。 第7圖為示意地顯示本發明之第丨實施形態之面狀 發光裝置的俯視圖。 第8圖為第丨實施形態之面狀發光裝置的概略剖視 圖。 第9(A)圖為一個擴散圖案之立體圖。第9(B)圖為設 於導光面板之背面的該擴散圖案之剖視圖。 第10(A)圖為不同形狀的一個擴散圖案之立體圖。第 10(B)圖為設於導光面板之背面的該擴散圖案之剖視圖。 第11(A)圖為一個配光控制圖案之立體圖。第u(b) 圖為設於導光面板之背面的該配光控制圖案之剖視圖。 第12圖為針對配光控制圖案之傾角進行說明的説 明圖。 第1 3圖為針對配光控制圖案之作用進行說明的説 明圖。 第14(A)及（B)圖為分別具有不同形狀之配光控制圖 案的立體圖。 -24- 201229586 弟15(A)圖為用於模擬之面狀發光裝置的俯視圖。第 1 5 (B)圖為第1 5 (A)圖之面狀發光裝置的概略剖視圖。 第16圖為顯示第15(A)圖之面狀發光裝置的配光控 制圖案形成區域之俯視圖。 第圖為表示對在背面無圖案之導光面板内的配 光分布進行測量之結果的圖。 第1 8圖為表示使用配光控制圖案控制配光分布時 之強度變化率的圖。 第1 9圖為示意地顯示本發明之第2實施形態之面狀 發光裝置的俯視圖。 第20(A)圖為第2實施形態之面狀發光裝置的概略 剖視圖。第20(B)圖為第20(A)圖之面狀發光裝置的局部 放大圖。 第21(A)圖為不同形狀的一個配光控制圖案之立體 圖。第2 1 (B)圖為設於導光面板之背面的該配光控制圖案 3 8之剖視圖。 第22(A)及（B)圖為具有其他形狀之各種配光控制圖 案的立體圖。 第23(A)〜（D)圖為具有再其他形狀之各種配光控制 圖案的立體圖。 第24(A)圖為顯示配置於導光面板之中央的配光控 制圖案之概略俯視圖。第24(B)圖為顯示配置於自導光面 板中央偏離的位置之配光控制圖案之概略俯視圖。 第2 5 (A)圖為顯示規則性地分布之配光控制圖案之 概略俯視圖。第25(B)圖為顯示隨機分布之配光控制圖案 之概略俯視圖。 -25- 201229586 第26圖為顯示在光量多之區域及光量少之區域使 分布方式變化之配光控制圖案的概略俯視圖。 第27圖為顯示各個傾角不同的配光控制圖案之概 略俯視圖。 第28(A)及（B)圖為顯示分別按照每行或每列而使配 光控制圖案的旋轉方向反轉之例子之概略俯視圖。 【主要元件符號說明】 31,51，61 〜68 面狀發光裝置 32 基板 33 導光面板 34 _光源 34a LED晶片 35 光射入端面 36 顯不區 37 擴散圖案 37a 反射面 37b 背面 38 配光控制圖案 38a 偏向反射面 38b 前面 39 光射入區域 40 光射出面 41 光量測量裝置 52 遮光帶 53 黑色片材 -26- 201229586 54 反 55 雙 B 不 T 發 射片 面黏著膠帶 進行光之導光的區域 光中心軸 -2 7-Further, the light distribution control pattern 38 is not limited to having a flat deflection as shown in Fig. 11! ^ C gate reflecting surface 38a, as shown in Fig. 14(A), the deflecting surface 38a is also 4*, & becomes a convex curved surface, or 'as shown in Fig. 14(B), the deflecting reflecting surface 38a is also Can be a concave surface. In the light distribution control pattern 38 in which the deflecting surface 38a has a convex curved surface, the light reflected by the deflecting surface 38a can be diffused, and in the light distribution control pattern 38 in which the deflecting surface 38a has a concave curved surface, the bias can be made The light reflected by the reflecting surface 38a has condensing properties. In addition, the light distribution control pattern 38 in which the deflecting reflection surface 38a is flat, the light distribution control pattern 38 in which the deflecting reflection surface 38a is a convex curved surface, and the light distribution control pattern 38 in which the deflecting reflection surface 38a is a concave curved surface may be mixed and utilized. . Next, the result of verifying the light distribution control pattern 38 by simulation will be described. Figures 15 and 16 show the model used for the simulated surface illuminating farm. As shown in Fig. 16, the light source 34 is disposed such that the width c of the light-emitting surface is l_8 mm and the gap between the light incident end faces 35 is f = 〇 2 mm. The light source 34 is a led light source that emits white light by a combination of a blue LED and a (yellow) phosphor, and emits light distributed from the light source 34. The light distribution control pattern 3 $ is arranged in a region of a vertical length a = 1 mm and a horizontal width b = 2 mm, and is arranged at intervals of 〇 lmm (distance between centers). The light distribution control pattern 38 is arranged in line symmetry about the center axis T of the light emission, and the inclination angle of the light distribution control pattern 38 is also line symmetrical with respect to the central axis τ of the light emission. A light distribution control pattern 38 has a width of d = 3 (^m and a width of ε = 106 μm) in plan view, and a tilt angle ε of the deflecting surface 38a is 45. In addition, any light distribution control The pattern 3 8 is inclined at an equal angle φ = 3 8. 201229586 The light guide panel 3 3 is prepared on the back side without providing the diffusion pattern 3 7 or the light distribution control pattern 38, and only the light distribution control is provided. In addition, the refractive index of the light guide panel 33 is 1.59 (the refractive index of the polycarbonate resin). Any of the light guide panels 33 does not have the diffusion pattern 37', so that the light is guided in the light guide panel 33. The light does not exit from the light exit surface 40, but the light is incident on the end face on the opposite side of the end face 35. As shown in Figures 15(A) and 15(B), the light along the light guide panel 33 The incident end surface 35 is provided with the light amount measuring device 4 1 on the opposite end surface side, and the intensity of light received from each position of the incident light amount measuring device 41 is measured, and the intensity (light distribution) of the light in each direction is obtained. As shown in Fig. 15(A), the light quantity measuring device 41 is arranged to be parallel to the center axis τ of the light emission. (θ = 0°), which can be measured in the range from 0 = -65 to θ = _65 in the light distribution direction. Figure 17 shows that neither the diffusion pattern is set on the back side and the light distribution control is not set. The light guide panel 33 of the pattern 38 is obtained by measuring the intensity (light emission intensity) of the light guided to the respective directions in the light guide panel 33 by the light amount measuring device 4i. The horizontal axis of Fig. 7 indicates that the light is emitted. The central axis T is the reference angle (light distribution direction e), and the vertical axis indicates the luminous intensity of each light distribution direction 。. From the graph of Fig. 7, it can be seen that the light guide control pattern 38 is not provided. In the panel 33, the intensity of the light in front of the light source 34 is the largest, from the light distribution direction to the shih s. From the 4 W ib position, the luminous intensity is lowered, and the light distribution square is equal to the critical angle 々 - 々 θ ±3 9. In the vicinity, the luminous intensity is close to zero. In addition, in the case of the female angle of the critical angle of the female + the day of the β person's nine directions (|θ|> 39.) 'the reason why the luminous intensity does not become zero, can go The sound am can be considered as a factor of scattering or blooming of light in the light guiding panel 33. -19- 20122958 6 Fig. 18 is a diagram showing the rate of change in luminance when the light guide panel 33 having the light distribution control pattern 38 is disposed on the back side. The rate of change in brightness in the light distribution direction 系 means (using the light distribution control pattern 3 is provided) 8 (light-emitting luminance in the light distribution direction when the light guide panel 3 3 is) + (light-emitting luminance in the same light distribution direction θ when the light guide panel 33 having the light distribution control pattern 38 is not used). Fig. 18 shows The light distribution direction is smaller than the inclination angle Φ of the light distribution control pattern 38 (I Θ丨 < φ = 3 8). The luminance change rate is about 1, but in the light distribution direction (|θ|> φ = 38) which is larger than the inclination angle φ of the light distribution control pattern 38, the luminance change rate becomes much larger than 1. From this, it is understood that the light distribution can be expanded by providing the light distribution control pattern 3 8 ', and light guiding can be performed in a light distribution direction larger than the inclination angle φ of the light distribution control pattern 38. (Second Embodiment) The planar light-emitting device 51 according to the second embodiment of the present invention will be described. However, the description of the same components as those of the first embodiment will be omitted. Fig. 19 is a plan view schematically showing the planar light-emitting device 51 of the second embodiment. In addition, the second Α (Α) diagram is a schematic cross-sectional view of the planar light-emitting device of the second embodiment, and the second Β (Β) diagram is a partial enlarged view of the planar light-emitting device of the second Α (Α) diagram. The planar light-emitting device 5 of the second embodiment is in the first embodiment of the planar light-emitting device, and further covers the light source 34 and the light distribution control pattern forming region in the light source 34 and the light guide panel. A light shielding tape 52 is adhered to the upper surface of 33. The light-shielding tape 52 is formed by a reflective sheet 54 composed of a white sheet or a reflecting mirror which reflects light in a lower area layer of the light-absorbing black sheet 53, and a double-sided adhesive tape 55 is adhered to the lower surface of the reflecting sheet 54. The light shielding tape 52 is adhered to the upper surface of the light source 34 and the light guide panel 33 by the double-sided adhesive tape 55. -20- 201229586 According to the planar light-emitting device 51', the light-injecting surface 35 is not directly incident on the light source 34 from the light source 34, and is intended to leak upward from the gap between the light source 34 and the light incident end face 35. The light is reflected, and the light can be incident into the light guide panel 33 from the light incident end surface 35. Thereby, the loss light caused by the reason that the light utilization efficiency is not incident into the light guide panel 33 can be reduced, and the luminance efficiency of the planar light-emitting device 51 can be improved. Further, the reflection sheet 54 is adhered to the position opposite to the light distribution control pattern 38. Therefore, leakage of light reflected by the light distribution control pattern 38 from the light exit surface 40 can be prevented, and the amount of light can be reduced. Further, the light incident on the light guide panel 33 is scattered and reflected by the reflection sheet 54 and the double-sided adhesive tape 55 on the upper surface of the light guide panel 33, so that the light distribution can be further uniformized. Further, the light distribution control pattern 38 may have various shapes in addition to the shapes shown in Figs. 14 and 14. For example, as in the light distribution control pattern 38 shown in Figs. 21(A) and (B), the inclination angles of the front three rituals are equal to the inclination angles of the deflecting reflection surfaces 38a (i.e., γ = ε), the cross section. The shape is a two-sided triangle. The light distribution control pattern 38 having a cross-section of a second equilateral triangle can be bent as shown in FIG. 22(A), and the deflecting surface 38 8 ' can be bent into a convex curved shape. As shown in the figure of Fig. 22(B), the entire surface may be bent so that the deflecting surface H is bent to a concave curved surface. When the deflecting reflection surface 38a is curved into a convex curved shape, the light reflected by the deflecting reflecting surface 38a can be further diffused, and if the deflecting reflecting surface 38a is curved into a concave curved surface, the value can be made. The light reflected by the deflecting surface 38a is condensed. 21-201229586 Further, the light distribution control pattern 38 as shown in Figs. 23(A) to (D) may be a zigzag pattern, a triangular pyramid pattern, a quadrangular pyramid (pyramidal pattern), a substantially conical pattern, or the like. Further, these various light distribution control patterns 38 may be mixed. (Other Embodiments) The light distribution control pattern 38 can be arranged in various ways in addition to the description of the i-th embodiment, whereby the light distribution can be controlled more precisely. Further, in the 24th to 28th drawings, the light distribution control pattern provided on the back surface of the light guide panel 33 is displayed on the surface of the light guide panel 33. On the other hand, the illustration of the diffusion pattern 37 is omitted in the figure. Generally, as in the planar light-emitting device 61 of Fig. 24(A), the light source 34 is disposed opposite to the center of the light guide panel 33, and the light distribution control pattern 38 is also opposed to the central axis of the light source 34. It is disposed symmetrically left and right so that the light is evenly aligned on the right and left sides of the light guide panel 33. However, in the case where the display region 36 is asymmetrical left and right or provided at a position deviated from the central portion of the light guide panel 33, it may be deviated as in the planar light-emitting device 62 of Fig. 24(B). The light source 34 and the light distribution control pattern 3 are disposed at the center of the light guide panel 33, and the light distribution control pattern 38 is disposed symmetrically with respect to the light emission center axis of the light source 34. Further, the light distribution control pattern 38 may be uniformly distributed in the light distribution control pattern formation area like the planar light-emitting device 63 of the 25th (A) diagram, but may be similar to the 25th (B) diagram. The planar light-emitting device 64 is randomly distributed as it is. Further, the 'light distribution control pattern 38 can also be in a region where the amount of light guided from the light source 34 is large as in the planar light-emitting device 65 of Fig. 6 (also -22-201229586, that is, the central axis of illumination with the light source 34) The area where the smaller angle is formed) increases the density of the light distribution control pattern 38' in a region where the amount of light is small (that is, a region where a large angle is formed with the central axis of the light source 34), and the light distribution control is reduced. The density of the pattern 38. According to this configuration, the light in the direction in which the amount of light is large can be diffused in a larger extent. The light diffusion in the direction in which the amount of light is small can be reduced. Therefore, the amount of light can be made uniform in the entire light guide panel 33. Further, the light distribution control pattern 38 may have a different inclination angle (φ) depending on the position as in the planar light-emitting device 66 of Fig. 27. Further, the light distribution control pattern 38 may also have a mixed inclination angle on one side of the light-emitting central axis of the light source 34, like the planar light-emitting device 67 of the 28th (A) diagram and the planar light-emitting device 68 of the 28th (B) diagram. Different people. Specifically, in the planar light-emitting device 67 shown in Fig. 28(A), the planar light emission shown in Fig. 2(B) is reversed in the direction in which the light distribution control pattern 38 is rotated. In the device 68, the rotation direction of the light distribution control pattern 38 is reversed in each column. Further, the light distribution control pattern 38 may not be formed on the surface opposite to the light exit surface 40 of the light guide panel 33, but may be formed on the same surface as the light exit surface 40. Similarly, the diffusion pattern 37 may be formed on the light exit surface 40 such that light diffused by the diffusion pattern 37 to be transmitted and emitted from the light exit surface 40. In the present invention, the light distribution distribution in the light guide panel 33 can be precisely controlled by the combination of the light distribution control patterns 38 or the light distribution control patterns 38. Further, when the width of the light guide panel 33 is wide, a plurality of light sources 34 may be used, and the light distribution control pattern 38 may be disposed in the vicinity of each of the light sources 34. -23- 201229586 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view schematically showing a conventional planar light-emitting device. Fig. 2 is a schematic cross-sectional view taken along the line X-X in Fig. 1. Figure 3 is a plan view showing the planar light-emitting device after the light source has been separated from the display area. Fig. 4 is a plan view showing a modified example of the surface light source device. Fig. 5 is a schematic cross-sectional view showing the surface light source device of Fig. 4. Fig. 6 is an explanatory view of a light-emitting panel module disclosed in Patent Document 1. Fig. 7 is a plan view schematically showing a planar light-emitting device according to a third embodiment of the present invention. Fig. 8 is a schematic cross-sectional view showing a planar light-emitting device of a second embodiment. Figure 9(A) is a perspective view of a diffusion pattern. Fig. 9(B) is a cross-sectional view of the diffusion pattern provided on the back surface of the light guiding panel. Figure 10(A) is a perspective view of a diffusion pattern of different shapes. Fig. 10(B) is a cross-sectional view of the diffusion pattern provided on the back surface of the light guiding panel. Figure 11(A) is a perspective view of a light distribution control pattern. Figure u(b) is a cross-sectional view of the light distribution control pattern provided on the back surface of the light guide panel. Fig. 12 is an explanatory view for explaining the inclination of the light distribution control pattern. Fig. 13 is an explanatory view for explaining the action of the light distribution control pattern. Figures 14(A) and (B) are perspective views of light distribution control patterns having different shapes, respectively. -24- 201229586 Figure 15 (A) is a top view of the planar light-emitting device used for the simulation. Fig. 15(B) is a schematic cross-sectional view showing the planar light-emitting device of Fig. 15(A). Fig. 16 is a plan view showing a light distribution control pattern forming region of the planar light-emitting device of Fig. 15(A). The figure is a view showing the result of measuring the distribution of light distribution in the light guide panel having no pattern on the back side. Fig. 18 is a view showing the rate of change in intensity when the light distribution is controlled using the light distribution control pattern. Fig. 19 is a plan view schematically showing a planar light-emitting device according to a second embodiment of the present invention. Fig. 20(A) is a schematic cross-sectional view showing a planar light-emitting device of a second embodiment. Fig. 20(B) is a partially enlarged view of the planar light-emitting device of Fig. 20(A). Figure 21(A) is a perspective view of a light distribution control pattern of different shapes. Fig. 2(B) is a cross-sectional view of the light distribution control pattern 38 provided on the back surface of the light guide panel. Figures 22(A) and (B) are perspective views of various light distribution control patterns having other shapes. Figures 23(A) to (D) are perspective views of various light distribution control patterns having other shapes. Fig. 24(A) is a schematic plan view showing a light distribution control pattern disposed at the center of the light guide panel. Fig. 24(B) is a schematic plan view showing a light distribution control pattern disposed at a position deviated from the center of the light guide panel. Fig. 2(5) is a schematic plan view showing a light distribution control pattern which is regularly distributed. Fig. 25(B) is a schematic plan view showing a randomly distributed light distribution control pattern. -25- 201229586 Fig. 26 is a schematic plan view showing a light distribution control pattern in which the distribution pattern is changed in a region where the amount of light is large and the amount of light is small. Fig. 27 is a schematic plan view showing a light distribution control pattern having different inclination angles. Figs. 28(A) and (B) are schematic plan views showing an example in which the rotation directions of the light distribution control patterns are reversed for each row or column. [Main component symbol description] 31, 51, 61 to 68 planar light-emitting device 32 substrate 33 light guide panel 34_light source 34a LED chip 35 light incident end face 36 display area 37 diffusion pattern 37a reflection surface 37b back surface 38 light distribution control Pattern 38a Deflection surface 38b Front surface 39 Light injection area 40 Light exit surface 41 Light quantity measuring device 52 Light shielding tape 53 Black sheet -26- 201229586 54 Reverse 55 Double B No T Transmitting one-sided adhesive tape for light-guided area light Center shaft-2 7-