TW201232119A - Surface source device and 3D display - Google Patents

Surface source device and 3D display Download PDF

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Publication number
TW201232119A
TW201232119A TW100140633A TW100140633A TW201232119A TW 201232119 A TW201232119 A TW 201232119A TW 100140633 A TW100140633 A TW 100140633A TW 100140633 A TW100140633 A TW 100140633A TW 201232119 A TW201232119 A TW 201232119A
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TW
Taiwan
Prior art keywords
light
light guide
guide plate
light source
source device
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Application number
TW100140633A
Other languages
Chinese (zh)
Inventor
Morihisa Ota
Masayuki Shinohara
Gouo Kurata
Hiroyuki Miyamoto
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Omron Tateisi Electronics Co
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Publication of TW201232119A publication Critical patent/TW201232119A/en

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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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • 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
    • G02B6/0045—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 by shaping at least a portion of the light guide
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • 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
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention is to restrain crosstalk from occurring in a 3D display or a surface source device used in the 3D display. According to the present invention, a left light source 41a and a right light source 41b are respectively arranged so as to face incident faces 33a, 33b of guiding plates 32a, 32b. Opposite faces to the incident faces 33a, 33b of the guiding plates 32a, 32b are slant, and are for slant faces 34a, 34b. Light absorbing members 35a, 35b are provided on the regions where the front surface or back face of the guiding plates 32a, 32b faces to the slant faces 34a, 34b. The guiding plates 32a, 32b are superposed mutually to an effect that the incident face 33a of the light guiding plate 32a and the slant face 34b of the light guiding plate 32b locate at one side and the slant face 34a of the light guiding plate 32a and the incident face 33b of the light guiding plate 32b locate at the other side.

Description

201232119 六、發明說明： 【發明所屬之技術領域】 具體而 顯示裝 本發明係關於面先源、裝置及立體顯示裝置 言，是關於用以使圖像或影像作三維顯示之立 置、及用於該立體顯示裝置之面光源裝置。 【先前技術】 對用以顯示所謂三維影像之立體顯示裝置而言具 有使用觀察用眼鏡之方法及不使用眼鏡之方法。但在使 用眼鏡之方法中’觀察者必須於頭部裝戴上眼鏡，所以 不僅麻煩，還會給觀察者帶來不舒適感。因此，作為立 體顯示裝置，以不使用眼鏡之方法較受歡迎。 作為不使用眼鏡之立體顯示裝置，例如，具有專利 文獻1所揭示者。 (專利文獻1) 第1(A)圖顯示專利文獻1所揭示之立體顯示裝置η 。於此立體顯示裝置11中，使呈楔形之導光板12a與同樣 呈棋形之導光板12b重疊而形成導光體12。導光板12a與 導光板12b係隔著空氣層而被重疊，且導光板i2a之厚度 較厚側的端面與導光板1 2b之厚度較薄側的端面係將左 右位置對準為一致’導光板1 2 a之厚度較薄側的端面與導 光板1 2 b之厚度較厚側的端面，亦是將左右位置對準為一 致。左側用光源1 3 a係與導光板12 a之厚度較厚的端面對 向。右側用光源13b係與導光板12b之厚度較厚的端面對 向。另外’於導光體12之前面配置有棱鏡片14，並於此 稜鏡片14之前面配置有液晶面板15。 201232119 另外’液晶面板15係分時性地交替顯示右眼用圖像 及左眼用圖像，左側用光源13a係與左眼用圖像同步進行 發光（此時，右側用光源13b熄滅），右側用光源係盥 右眼用圖像同步進行發光（此時，左側用光源⑴媳滅卜、 其結果’於立體顯示裝置u中’自左侧用光源A射出之 左側照明光16a被轉換成左眼用圖像而射入觀察者之左 眼17a ’自右側用光源13b射出之右側照明光i6b被轉換成 右眼用圖像而射入觀察者之右眼！ 7 b，並藉由觀察者辨識 為立體影像。 然而，導光板12a、12b係藉由樹脂成型所製造，所 以，若將兩導光板12a、12b之厚度較薄側之端面的厚度 作成過薄時，恐有於該端面產生成型不良、或者在立體 顯示裝置11之製造製程或組裝製程中會於該端面產生缺 口之虞。因此，如第1(B)圖所示，實際上會使導光板丄〜 、1 2b之厚度較薄側之端面丨8分別具有某程度之厚度。 其結果’會因在厚度較薄側之端面丨8所反射的返回 光而產生暈光，並因此緣故而於立體顯示裝置n產生串 擾。串擾係指自左側用光源丨3a發出之一部分光朝與右側 照明光1 6b相同之方向射出而將左眼用圖像射入觀察者 之右眼1 7b，或者’自右側用光源1 3b射出之一部分光朝 與左側照明光1 6a相同之方向射出而將右眼用圖像射入 觀察者之左眼17a的現象。 具體而言，如第丨圖中之虛線所示，當自右側用 光源1 3 b射入導光板1 2b之光的一部分到達導光板12b之 厚度較薄側之端面18時，此光16c於端面18被反射而成為 201232119 返回光此返回光朝與原來之光16c相反的方向而於導光 板12b内被導光，所以，當自導光板射出時，則以第 1(B)圖所示之光16d方式朝觀察者之左眼射出。同樣 在自左側用光源13a射入導光板12a之光的一部分，於 導光板12a之厚度較薄側之端面1 8被反射的情況下，此返 光亦於導光板12a内被導光而朝觀察者之右眼i7b射出。 如此，當串擾惡化時，於生成右眼用圖像時，不僅 觀察者之右眼l7b辨識右眼用圖像，連左眼17a亦辨識右 眼用圖像，另外，於生成左眼用圖像時，不僅觀察者之 左眼1 7a辨識左眼用圖像，連右眼j 7b亦辨識左眼用圖像 其結果’左眼用圖像會重疊於右眼所辨識之右眼用圖 像上而產生疊影’另外’右眼用圖像會重疊於左眼所辨 識之左眼用圖像上而產生疊影，從而產生圖像模糊的問 題。 (專利文獻2) 第2(A)圖顯示專利文獻2所揭示之面光源裝置的構 造。於此面光源裝置21中，使光源24與導光板22之入射 ί而面2 3對向配置’且使光吸收構件2 6 (黑色塗料或黑膠帶 )貼合於與入射端面23對向之端面25。如第2(A)圖所示， 面光源裝置2 1係以使光吸收構件26吸收到達導光板22之 端面2 5的光’藉此使得產生於導光板2 2之端部的條紋形 狀之光拍頻消失作為目的。只要依此方式設置光吸收構 件’即可吸收到達導光板之端面的光，所以，可減少在 導光板之端面反射而於導光板内朝原方向返回之光。因 此’藉由於導光板之端面設置光吸收構件，期望能除去 201232119 相關專利文獻1中所述 4之串擾的原因。 然而，於立體顯示萝 告 » # ..,,. 裝置中，δ M專利文獻2之方式設 Γ7氺. , κ 2(Α)圖所不’實際上會因為是返 回先，而射出與原來之 疋 盔、、έ夯八媒π θ π β射出先273為相反傾斜之光27b， .，.、/去充刀獲付減低串擾 、▲ <效果〇1§·可認為是即使於導来 板22之端面25設置光w a 丨文、等元 是*八明m , a ^收構件26，只要光吸收構件26不 兀王 ’ S於端面25反射肚許程度之光，另外 ，假設即使是完全吸收w ^丄+权度之先’另外 肢’虽因光吸收構件26之塗布不 勻而在其與端面25之間產 布不 生工巩層時，光仍會於端面25 汉射而產生返回光之緣故 [先前技術文獻] [專利文獻] [專利文獻1]日本特開2001-66547號公報 第2 FI[專利文獻2]日本特開平6-8263 1號公報（段落0012、 弟2圖） 【發明内容】 [發明所欲解決之課題] 本發明係鑒於上述技術課題而開發完成者，其目的 在於，在立體顯示裝置或使用於該立體顯示裝置之面光 源裝置中’可抑制串擾之產生。 [解決課題之手段] 本發明之面光源裝置，其係具備：第一導光板；以 /、則述第導光板之一端的端面對向的方式配置之光源 ;第二導光板；及以與前述第二導光板之一端的端面： 向的方式配置之光源；其中，使前述第—導光板與前述 201232119 第 二 導 光 板 重 疊 而 構 成 為 • 前 述 第 — 導 光 板 及 光 板 上 的. 位 於 光 源 配 置 面 其 係 以 垂 直 於 前 方 式 傾 斜 9 於 前 述 導 光 面 對 向 的 域 設 置 光 吸 本 發 明 之 面 光 源 裝 板 中 將 與 光 源 配 置 側 且 於 此 導 光 板 之 表 面 或 域 設 置 光 吸 收構件 所 面 反 射 後 由 光 吸 收 構件 吸 收 而 被 光 吸 收 構 件 所 透 傾 斜 面 而 射 出 至 外 部 置 y 可 減 少 在 導 光 板 之 而 返 回 的 返 回 光 9 於 使 擾 的 產 生 〇 本發 明 之 面 光 源 裝 導 光 板 與 刖 述 第 … _ 導 之 光 源 配 置 側 的 端 面 與 側 的 端 面 係 位 於 同 —— 側 光 源 側 的 端 面 盘 前 述 第 係 位 於 同 — 側 0 於 前 述 導 光 板 左 右 顛 倒 而 予 重 二 導 光 板 具 有 相 同 構 造 與 白 第 二 導 光板 射 出 的 光 體 > 前 述 面 光 源 裝 置 之特 徵 述 第 — 導 光 板 當 中 之 至 少一 導 端 面 的 相 反 側 之 端 面 為 一傾 斜 導 先 板 之 表 背 兩 面 的 面 傾斜 的 之 表 面 或 背 面 當 中 與 前 述傾 斜 構件 〇 9 係 於 第 一 導 光 板 及 第 二導 光 面 相 反 側 之 端 面 作 成 傾 斜面 ， 面 當 中 與 .yg- 刖 述 傾 斜 面 對 向的 (A y 射 入 傾 斜 面 之 光 在 前 述傾 斜 吸 收 0 又 未 由 光 吸 收 構件 所 射 的 光 再 度 射 入 傾 斜 面 ，並 穿 因 此 5 根 據 本發 明 之 面 光源 裝 源 相 反 側 的 端 面 (傾斜面）反 射 在 立 體 顯 示 裝 置 時 J 可 抑制 串 的 其 中 一 個 實 施 例 係 將 前述 第 板 重 疊 為 5 前 述 第 一 導 光板 上 述 第 二 導 光 板 上 之 未 配 置光 源 且 前 述 第 .— 導 光 板 上 之 未配 置 導 光 板 上 之 光 源 配 置 側 的端 面 施 例 中 將 第 一 導 光 板 與第 -- 5 所 以 > 即 使 第 一 導 光 板與 第 仍 可 使 白 第 一 導 光 板 射 出之 光 朝 不 同 方 向 射 出 0 因 此 ，可 簡 201232119 化面光源裝置之構造。201232119 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a surface source, a device, and a stereoscopic display device, and relates to a stand-up for use in three-dimensional display of an image or image, and The surface light source device of the stereoscopic display device. [Prior Art] A stereoscopic display device for displaying a so-called three-dimensional image has a method of using observation glasses and a method of not using glasses. However, in the method of using glasses, the observer must wear the glasses on the head, so that it is not only troublesome but also gives the observer an uncomfortable feeling. Therefore, as a stereoscopic display device, a method of not using glasses is more popular. As a stereoscopic display device that does not use glasses, for example, it is disclosed in Patent Document 1. (Patent Document 1) FIG. 1(A) shows a stereoscopic display device η disclosed in Patent Document 1. In the stereoscopic display device 11, the light guide body 12 is formed by overlapping the wedge-shaped light guide plate 12a and the same chevron-shaped light guide plate 12b. The light guide plate 12a and the light guide plate 12b are overlapped with each other via the air layer, and the end surface of the light guide plate i2a having a thicker side and the end surface of the light guide plate 12b having a thinner side are aligned to the left and right positions to be the same as the light guide plate. The end face on the thinner side of the thickness of 1 2 a and the end face on the thicker side of the light guide plate 1 2 b are also aligned in the left and right positions. The left side light source 1 3 a is opposed to the thick end surface of the light guide plate 12a. The right side light source 13b is opposed to the thick end surface of the light guide plate 12b. Further, the prism sheet 14 is disposed on the front surface of the light guide body 12, and the liquid crystal panel 15 is disposed on the front surface of the sheet piece 14. In addition, the liquid crystal panel 15 alternately displays the right-eye image and the left-eye image in a time-division manner, and the left-side light source 13a emits light in synchronization with the left-eye image (in this case, the right-side light source 13b is turned off). The right side light source system 盥 the right eye image is synchronized to emit light (in this case, the left side light source (1) is extinguished, and the result 'in the stereoscopic display device u' is emitted from the left side light source A by the left side illumination light 16a. The left eye image is incident on the left eye 17a of the observer. The right illumination light i6b emitted from the right side light source 13b is converted into a right eye image and incident on the observer's right eye! 7 b, and by observation However, the light guide plates 12a and 12b are manufactured by resin molding. Therefore, if the thickness of the end faces of the two light guide plates 12a and 12b on the thin side is made too thin, the end faces may be formed. There is a problem of molding failure, or a gap is formed in the end surface in the manufacturing process or assembly process of the stereoscopic display device 11. Therefore, as shown in Fig. 1(B), the light guide plates 丄~, 1 2b are actually caused. The end face 丨8 of the thinner side is respectively There is a certain thickness. The result is that the light is reflected by the return light reflected by the end face 8 of the thinner side, and thus crosstalk is generated in the stereoscopic display device n. Crosstalk refers to the light source from the left side. 3a emits a part of the light emitted in the same direction as the right illumination light 16b, and the left eye image is incident on the observer's right eye 17b, or 'from the right side light source 13b, a part of the light is directed toward the left side illumination light. 1 6a is emitted in the same direction and the image for the right eye is incident on the left eye 17a of the observer. Specifically, as shown by the broken line in the figure, the light source is incident from the right side light source 1 3 b When a part of the light of 1 2b reaches the end surface 18 of the thinner side of the light guide plate 12b, the light 16c is reflected at the end surface 18 to become 201232119. The return light is in the opposite direction to the original light 16c to the light guide plate 12b. Since the inside is guided, when it is emitted from the light guide plate, it is emitted toward the left eye of the observer by the light 16d shown in Fig. 1(B). Similarly, the light is incident on the light guide plate 12a from the left side light source 13a. Part of the light guide plate 12a is thinner When the end face 18 is reflected, the return light is also guided to the right eye i7b of the observer in the light guide plate 12a. Thus, when the crosstalk is deteriorated, not only the image for the right eye is generated but also observed. The right eye l7b recognizes the image for the right eye, and the left eye 17a also recognizes the image for the right eye. In addition, when the image for the left eye is generated, not only the left eye 1 7a of the observer recognizes the image for the left eye, Even the right eye j 7b also recognizes the image for the left eye. The result is that the image for the left eye is superimposed on the image for the right eye recognized by the right eye to generate a double image. The image of the right eye overlaps the left image. The image of the left eye image recognized by the eye is superimposed, thereby causing a problem of image blurring. (Patent Document 2) The second (A) diagram shows the configuration of the surface light source device disclosed in Patent Document 2. In the surface light source device 21, the light source 24 is placed opposite to the surface of the light guide plate 22, and the light absorbing member 26 (black paint or black tape) is attached to the incident end surface 23. End face 25. As shown in Fig. 2(A), the surface light source device 2 1 is such that the light absorbing member 26 absorbs the light reaching the end surface 25 of the light guide plate 22, thereby causing the stripe shape of the end portion of the light guide plate 2 2 to be generated. The light beat frequency disappears as a purpose. As long as the light absorbing member is disposed in this manner, light reaching the end surface of the light guide plate can be absorbed, so that light reflected at the end surface of the light guide plate and returning in the original direction in the light guide plate can be reduced. Therefore, it is desirable to remove the cause of the crosstalk described in Patent Document 1 of 201232119 by providing the light absorbing member on the end surface of the light guide plate. However, in the stereoscopic display of the ROGO » # ..,,. device, the method of δ M Patent Document 2 is set to 氺7氺. , κ 2(Α) diagram is not 'actually because it is returned first, but the shot is the original疋 、 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The end face 25 of the board 22 is provided with light wa, and the element is * 八明 m , a ^ receiving member 26, as long as the light absorbing member 26 does not reflect the light of the degree of the end surface 25, in addition, it is assumed that even It is the first 'other limb' that completely absorbs w ^ 丄 + weight. Although the unstained scler layer is produced between the end surface 25 and the end surface 25 due to the uneven coating of the light absorbing member 26, the light is still incident on the end face 25 [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2001-66547, No. 2 FI [Patent Document 2] Japanese Patent Laid-Open No. Hei 6-8263 No. 1 (paragraph 0102, brother 2] The present invention has been developed in view of the above technical problems, and an object thereof is to provide an object of the present invention. The generation of crosstalk can be suppressed in the stereoscopic display device or the surface light source device used in the stereoscopic display device. [Means for Solving the Problem] The surface light source device of the present invention includes: a first light guide plate; a light source arranged to face an end surface of one end of the light guide plate; a second light guide plate; a light source disposed at an end surface of one end of the second light guide plate; wherein the first light guide plate is overlapped with the second light guide plate of the 201232119; and the light guide plate and the light plate are formed on the light guide plate. The arranging surface is disposed in a direction perpendicular to the front direction, and the light absorbing member is disposed in the surface light source mounting plate of the present invention, and the light absorbing member is disposed on the light source arranging side and the surface or the field of the light guiding plate. After the surface is reflected, it is absorbed by the light absorbing member and is emitted to the outside by the inclined surface of the light absorbing member. The return light 9 returned to the light guide plate can be reduced to cause the occurrence of disturbance. The surface light source of the present invention is provided with a light guide plate and Narrative... _ Guide The end face of the light source arrangement side and the side end face are located at the same side - the side plate of the side light source side is located at the same side - the side 0 is reversed to the left and right of the light guide plate, and the second light guide plate has the same structure and the white second light guide plate The light-emitting body of the present invention is characterized in that the end surface of the opposite side of at least one of the light guide plates is an inclined surface or a back surface of the front and back surfaces of the inclined guide plate and the aforementioned inclination The member 〇 9 is formed on the opposite end faces of the first light guide plate and the second light guiding surface to form an inclined surface, and the surface faces the yg- slanting direction (the light incident on the inclined surface is absorbed by the tilt in the aforementioned tilt 0) The light that has not been emitted by the light absorbing member is again incident on the inclined surface, and is thus worn. Therefore, the end surface (inclined surface) on the opposite side of the surface light source according to the present invention is reflected in the stereoscopic display device. One embodiment of the J-suppressable string is to superimpose the first plate into 5 un-configured light sources on the second light guide plate of the first light guide plate and the light source on the undisposed light guide plate on the first light guide plate. In the embodiment of the side surface of the arrangement side, the first light guide plate and the first -5; therefore, even if the first light guide plate and the light that can still be emitted from the first white light guide plate are emitted in different directions, the figure can be reduced to 201232119. The construction of the light source device.

發月之面光源裝置的另一實施例俘前、f偭料& 傾斜角為15。以上且65。以下…要傾斜^述傾斜面之 以上且65〇以下/、要傾斜面之傾斜角係15。 以下’即可減小在I 之光的比例β 1板之傾斜面反射而返回 二導又另一實施例係前述第-導光板及前述第 等元板為分別於光源 為發光區域之藤㈡… 化附近具有厚度比作 光板本h 的部分’且於厚度比前述導 體厚的部分與前述導光板本體之 比前述導光板本體厚的部分起朝向前板 可在厚度較厚之部分將自光 =所以， 先板内並朝厚度薄之導光板本體進行導 ： 面光㈣置之厚度’還可提高發光區域之亮度。4 、另外，於此實施例中，亦可沿前述第 述第一導光板上之光源配置 月】 “,二v 罝側的、面分別配置前述光源 复數個，麵成》別與這些光源對應而於前述傾斜 的：面將V槽排列為放射狀之圖案.區域，據前述實施例 m導光板之厚度較厚部分之光被朝導光板本體導 光的途中，光不容易自傾斜區域朝外 高光利用效率。 μ出’從而可提 另外，此實施例中之前述第一導光板 入丄心比前述導光 板本體厚之部分，亦可在與前述第二墓# ,,^ A 守尤板對向之側的面 上自則述第一導光板的導光板本體突出，前述第二導光板 201232119 上之比前述導光板本體 板對向之側的面上自前 部分，亦可在與前述第一導光 。根據前述實施例，第〜 一光板的導光板本體突出 向内側，所以，可達成备， 光板之突出部分相互朝 本發明之再另-實4:二薄型化。 鋸齒形之凹凸㈣。根據 月〗述傾斜面形成有戴面 置凹，圖案，使得光容易康：：：;列：藉由於傾斜面設 目傾斜面朝外部漏出。藉此， 可減；>、在傾斜面反射而返 示裝置時的串擾。 …’可抑制使用於立體顯 :於本發明之面光 °根據本發明之立 源相反側的端面（ ’可抑制串擾的發 本發明之立體顯示裝置之特徵為 源裝置的前方配置光學片及液晶面板 體顯示裝置，可減少在導光板之與光 傾斜面）所反射而返回之返回光，所以 生，生成明亮之立體影像。 又，用以解決本發明之上述課題的手段，具有使以 上說明之構成要素適宜地組合而成的特徵，本發明可根 據前述構成要素之組合進行各種之變化。 【實施方式】 [實施發明之形態] 以下’參照圖式說明本發明之較佳實施例。但是本 發明並不褐限於以下之實施例，只要在未超出本發明之 實質範圍内，即可進行各種設計及變化。 (第1實施例） 首先，參照第3、第4及第5圖’說明本發明之第1實 施例的面光源裝置3 1之構造。第3圖為顯示第i實施例之 -10- 201232119 面光源裝置31的立體圖。第4圖為面光源裝置31之分解立 體圖（，、疋，顯不使前面側之導光板旋轉丨8 〇。的狀態）。 第5(A)及第5(B)圖為面光源裝置之作用說明圖。 於第3及第4圖所示之面光源裝置31中，使導光板 3 2a(第一導光板與第二導光板當中的其中一導光板）與 導光板32b(第一導光板與第二導光板當中的另一導光板 )重豐而形成導光體32。導光板323及導光板32]3係藉由聚 石厌酸自曰樹脂、聚甲基丙烯酸甲酯樹脂等之高折射率的透 光性樹脂而被成型為除了一側端部以外其餘為均厚之平 板狀。 在導光板32a之光射入端面33a相反側的端面，於導 光板3 2 a之整個寬度方向上形成有傾斜面3 4 a。此傾斜面 34a係以隨著遠離光射入端面33a而自導光板32&的背面 漸漸地朝前面接近的方式傾斜。在導光板32a之前面（光 射出面）’與形成有傾斜面34a之區域對向，而於導光板 32a之整個寬度方向上設有光吸收構件35a。光吸收構件 35a係可採用光吸收率高之材料’例如，於導光板32a上 塗布黑色油墨或者黏貼黑色膠帶而形成。 同樣’在導光板32b之光射入端面33b相反側的端面 ’於導光板32b之整個寬度方向上形成有傾斜面34t>。此 傾斜面34b係以隨著遠離光射入端面33b而自導光板32b 的如面漸漸地朝背面接近的方式傾斜。在導光板3 2 b之背 面（與光射出面相反側的面），與形成有傾斜面34b之區域 對向’而於導光板32b之整個寬度方向上設有光吸收構件 35b。光吸收構件35b可採用光吸收率高之材料，例如， 201232119 於導光板3 2b上塗布黑色油墨或者黏貼黑色膠帶而形成 。又’於導光板32a、32b之前面及背面當中的至少一面 成型有呈凸狀或凹狀之多個微小擴散圖案37a、37b(參照 第5圖）。 如第3圖所示，導光板32a及導光板32b係以各自之傾 斜面3 4 a、3 4 b分別位於相反側的方式、且以導光板3 2 a 之背面與導光板32b之前面相互面對的方式所重疊。只是 ’導光板32a及導光板32b不是直接貼合，而是隔著折射 率比兩導光板32a、32b還小之低折射率層36(例如，空氣 層、透明黏著劑層、透明液體層等）進行重疊。 於導光體32之背面配置有反射構件4〇。反射構件4〇 係由白色树月曰片或金屬，治專之向反射率的材料所形成， 其疋用以反射從導光體32之背面茂漏之光而再射入至導 光體3 2者’其可減少漏光’提高光利用效率。 左側用光源4 1 a及右側用光源4 1 b係均由LED光源所 構成。亦即’在兩光源41a、4 lb中，如第5(A)圖所示， LED晶片42係被封裝於透明樹脂43内，除了透明樹脂43 之正面（光射出窗）以外，其餘各面均係由白色樹脂構成 之覆被部44所覆蓋。因此，當使LED晶片42發光時，自 各光源41a、41b之正面射出光。此左側用光源41a係一個 或多個地被安裝於可撓性印刷電路基板45a上，如第5(A) 圖所不，可撓性印刷電路基板45a係可位於左側用光源 41a之前面側，亦可位於左側用光源4U之後側。右側用 光源41b係一個或多個地被安裝於另一可撓性印刷電路 基板45b上，如第5(A)圖所示，可撓性印刷電路基板45b -12- 201232119 係可位於右側用光源4 1 b之後側，亦可位於右側用光源 4 1 b之前面側。 左侧用光源41a係以使其光射出窗與導光板32a之光 射入端面3 3 a對向之方式所配置。同樣，右側用光源4 1 b 係以使其光射出窗與導光板32b之光射入端面33b對向之 方式所配置。左側用光源4 1 a及右側用光源4 1 b係以能以 一定周期反複交替地進行點亮或熄滅的方式所控制。又 ’作為左側用光源4 1 a及右側用光源4 1 b，亦可使用冷極 陰線管來取代LED光源。 接著，針對如上述之構造的面光源裝置3 1中的光的 動作進行說明。當自左側用光源41a射出光時，此光自光 射入端面33a射入導光板32a内，且一面在導光板32a之前 面及背面反複地進行全反射一面於導光板32&内被進行 導光。當於導光板3 2a内進行導光之光，被設於導光板32a 之背面的擴散圖案37a所反射，而以小於全反射之臨界角 的入射角朝導光板32a之前面射入時（或者，當被設於32a 之4面的擴散圖案3 7a所反射時）’依照如第5(A)圖所示 之左側照明光38a的方式自面光源裝置3 1朝左斜前方射 出。同樣’當自右側用光源41b射出而於導光板32a内進 仃導光之光’被設於導光板32a之前面或背面的擴散圖案 所擴政或反射時’依照如第5 ( a )圖所示之右側照明光 38b的方式自面光源裝置^丨朝右斜前方射出。如第“A) 圖所不’這些左側照明光38a及右側照明光38b，係相對 於垂直於導光板32a前面之法線方向朝相反側傾斜如後 述’成為用以產生立體影像之最佳光線。 -13- 201232119 另一方面，於導光板32a、32b内進行導光而射入傾 斜面34a、34b之光的一部分，分別自傾斜面34&、朝 外部漏出，一部分光在傾斜面34a、3仆被全反射。在傾 斜面34a進行全反射之光被導向導光板32&之前面，另外 ，在傾斜面34b進行全反射之光被導向導光板32b之背面 ’且分別由光吸收構件3 5 a、3 5 b所吸收。 另外，未由光吸收構件35a、35b所完全吸收而被反 射之光，依照第5(B)圖所示之光39a、39b，穿透傾斜面 34a、34b而朝外部漏出。第6圖為與本實施例之比較例， 其只顯示一導光板61。於此比較例中，使導光板Μ之端 面傾斜，並於此傾斜面62上設置光吸收構件63。因此， 到達傾斜面62之光當中的未被光吸收構件63所吸收而於 傾斜面62反射的光65，在導光板61之背面或傾斜面62重 複地進行反射，藉此，朝與用以產生立體影像之射出光 64相反的方向射出。 因此，於在傾斜面62上設置光吸收構件63的比較例 之情況下，未被光吸收構件63所吸收之光65，朝與原射 出方向的光64相反的方向射出，從而會於立體顯示裝置 產生串擾。相對於此，於本實施例之面光源裝置3丨的情 況下，未由光吸收構件35a、3 5b所吸收之光，穿透傾斜 面34a、3 4b而朝外部漏出，所以，變得不容易自導光板 32a ' 32b之前面射出，因而不容易發生争擾。另外，於 面光源裝置31中，在導光板32a、32b之前面或背面設置 光吸收構件35a、35b，所以，與像比較例那樣於傾斜面 設置光吸收構件之情況比較，可穩定光吸收構件35a、35b -14- 201232119 的光吸收能’還可提高面光源裝置3丨之生產性。 第7(A)圖顯示傾斜面34a、3仆之傾斜角α與在傾斜面 34a、34b反射而返回之返回光的比狀間的關係（模擬結 果）。例如，射入傾斜面34b之光，如第7(B)圖所示，一 部分光直接穿透傾斜面34b而朝外部漏出，一部分光在傾 斜面34b反射之後由光吸收構件35b所吸收。另外，在光 吸收構件35b亦被反射之光，再度射入傾斜面州，並穿 透傾斜面3 4b而朝外部：忌ψ α 初「哔漏出。另外，一部分光（以虛線箭 頭所示之光）在傾斜面34b反射後成為返回光。第7(α)圖 之縱軸所示的返回光之比例，係指以百分比表示在傾斜 面3 4a 3 4b反射而朝原方向返回之返回光的光量對射入 傾斜面34a、34b之光的光量的比例。另外，傾斜面“a 、34b之傾斜角α係自導光板32&、3孔之前面或背面所測 由第7(A)圖可知，若將傾斜面34&、3仆之傾斜角α設 疋為1 5以上且65。以下，即可減小返回光之比例，減低 成為串擾之原因的光。又，第7(A)圖之關係不會因導光 板32a的厚度而發生變化，另外，只要是一般所使用之光 吸收構件’亦幾乎不會因光吸收構件35a、3“的材料而 心生t化。藉此，以將傾斜面34a、3朴之傾斜角α為 15°$α$65。較為適宜。尤其是為了縮短光吸收構件 、35b之寬度a而擴大面光源裝置31之有效發光區域，以 傾斜面34a、34b之傾斜角〇^為大致45。最為適宜。 另外，光吸收構件35a、35b之寬度a，只要是接近於 傾斜面34a之水平方向的寬度b，可短可長。若為用於二 -15- 201232119 般之行動電話的顯示面板的情況，即使光吸收構件35a 、35b之寬度a為0.5mm以下亦不會有問題。 第8圖顯示使用該面光源裝置31之立體顯示裝置51 的構造。於此立體顯示裝置51中，於導光體32之前面重 疊光學片53並於光學片53上貼合有框形雙面膠帶52。框 形雙面膠帶52係由黑色黏著膠帶等所形成之光吸收用構 件，其在與導光體3 2之有效發光區域對應的區域設有開 口，且用以覆蓋導光體32之前面周圍。又，於框形雙面 膠帶52之開口部的前方重疊有液晶面板54。 光學片53係於其背面形成有微細之三角稜鏡狀的棱 鏡狀圖案53a，並於前面形成有微細之凸透鏡狀的透鏡狀 圖案5 3b。稜鏡狀圖案53 a及透鏡狀圖案53b，其與導光板 32a、32b之寬度方向（Y方向）垂直的截面成為均勻的截面 形狀，且沿導光板32a、32b之長度方向（X方向）分別以— 定間距所排列。只是，透鏡狀圖案53b之排列間距係比棱 鏡狀圖案5 3 a之排列間距略大。稜鏡狀圖案5 3 a係以相對 於與通過光學片53之中心的X方向垂直的面呈對稱的方 式所配置’透鏡狀圖案53b亦以相對於與通過光學片μ 之中心的X方向垂直的面呈對稱的方式所配置。液晶面板 5 4係以父替地顯不觀察者用右眼觀察時的圖像（右目p 圖像）及用左眼觀察時的圖像（左眼用圖像）的古々 "J刀八所控制 。又，於第7圖中，Z方向顯示導光板3 2a、3 2b之厚声方 向。 液晶面板54之左眼用/右眼用圖像與左侧用光源*立 及右側用光源41b之點亮/德!滅，係由同步驅動裝置^所 -16- 201232119 同步控制。同步驅動裝置56係以觀察者無法辨識左右圓 像之切換的程度之短周期，使左眼用圖像及右眼用圖像 交替地顯示於液晶面板54，與液晶面板54之左眼用圖像 同步地使左側用光源4U點亮（右側用光源41b熄滅），另 外，與右眼用圖像同步地使右側用光源41b點亮（左侧用 光源4 1 a熄滅）。 當右側用光源41b點亮時，自右侧用光源41b發出之 光（白色光），作為最大強度方向集中之右側照明光38b， 自導光體32之整個有效發光區域朝右斜前方射出。自導 光體32射出之右側照明光38b，以穿透於各像素之光被集 中於位於與液晶面板54保持大致規定距離的觀察者之右 眼55b的方式，藉由光學片53改變方向後射入液晶面板μ 。此右側照明光38b係藉由穿透液晶面板54而被轉換為右 眼用圖像，再由觀察者之右眼55b所辨識。 同樣，s左側用光源4 1 a點亮時，自左側用光源4 i a 發出之光（白色光），作為最大強度方向集t之左側照明 光38a，自導光體32之整個有效發光區域朝左斜前方射出 。自導光體32射出之左側照明光38a，以穿透於各像素之 光被集中於觀察者之左眼55a的方式，藉由光學片53改變 方向後射入液晶面板54。此左側照明光38a係藉由穿透液 晶面板54而被轉換為左眼用圖像，再由觀察者之左眼55a 所辨識。 此時’藉由此光學片53之工作，射入稜鏡狀圖案53a 之左側照明光38a ’係藉稜鏡狀圖案53a改變光線方向， 再於穿過透鏡狀圖案531)時，藉由透鏡狀圖案53b朝左眼 -17- 201232119 55a之方向彎曲，再藉由穿過透鏡狀圖案5讣而被集中於 左眼55a。右側照明光38b係藉由相同之動作，藉由穿過 光學片53而被集中於右眼55b。 ° ^如此，左眼用圖像及右眼用圖像雖被交替地輸送至 觀察者之左眼55a及右眼55b，但藉由殘像效應，觀察者 能夠同時辨識右眼用圖像及左眼用圖像，因而可辨識為 三維影像（立體影像）。 另一方面，在導光板32a、32b之傾斜面34a、3讣所 反射之光’係由光吸收構件35a、35b所吸收，另外，在 光吸收構件35a、35b亦被反射之光39a' 39b，再度射入 傾斜面3 4 a、3 4 b，並自傾斜 結果，造成串擾之原因的返 置5 1之立體影像上抑制串擾 化。 面34a、34b朝外部漏出。其 回光變少，可於立體顯示裝 的產生，以使立體影像明亮 (第2實施例） 第9圖為本發明之第2實施例的面光源裝置7丨之概要 剖視圖。於此面光源裝置71中，將前面側之導光板32a 設計成與第1實施例之面光源裝置31的情況為表背面相 反。有關其他方面，則與第1實施例之情況相同。於此種 面光源裝置7丨中，亦可獲得與面光源裂置31相同之作用 效果’在使用於立體顯示裝置時，可減低串擾。 (第3實施例） 第10圖為本發明之第3實施例的面光源裝置8丨之概 要剖視圖。使用於此面光源裝置8丨之導光板32a、32b , 如第1丨圖所示，其形狀與第i實施例之面光源裝置31的導 -18- 201232119 光板32a及32b的形狀不同。 如第11圖所示，使用於面光源裝置81之導光板32a 、32b，係由板厚較厚之光導入部82、板厚較薄之導光板 本體83、連結光導入部82與導光板本體83之間的光移行 部84(傾斜區域）所構成。導光板32&之前面與導光板3沘 之背面成為平坦面85，光導入部82之與平坦面85對向的 面成為與平坦面85大致平行的突平面86，導光板本體Μ 之與平坦面85對向的面成為與平坦面85大致平行的本體 平面部87 ’光移行部84之與平坦面85對向的面成為自突 平面86朝本體平面部87傾斜之斜面88。另外，於導光板 32a、32b之導光板本體83的端面分別形成有傾斜面34& 、34b，傾斜面34a、3仆係以隨著遠離光導入部82而自導 光板本體83的本體平面部87側漸漸地朝平坦面85接近的 方式傾斜。在平坦面85之端部，以與傾斜面34a、34b對 向之方式設有帶狀之光吸收構件35a、35b。光導入部82 之厚度係構成為比左側用光源4ia及右側用光源41b之光 射出窗的高度更厚’且比光源4丨a及光源4丨b的高度薄。 於導光板本體83之平坦面85及本體平面部87的任一方的 面上形成有用以自導光板本體83朝前面側射出光之多個 微細的擴散圖案（例如，將呈截面三角形狀凹陷的稜鏡狀 圖案等以平行或圓弧狀排列所成）。 如第11圖所示，導光板32a及導光板32b係以使導光 板32a上下翻轉且光導入部82側與導光板本體83側相互 位於相反侧之方式，隔著低折射率層將導光板本體83之 本體平面部87彼此重疊而成者。因此，無論是導光板32a -19- 201232119 還是導光板32b ’光導入部82之突出部分均朝向内側而不 會突出於導光體32之外面。左側用光源41a係以與位於導 光板32a之光導入部82側的光射入端面33a的方式配置， 右側用光源41b係以與位於導光板3几之光導入部82側的 光射入端面33b對向的方式配置。 於此面光源裝置81中，因為光導入部82之厚度與各 光源41a、41b之高度大致相等，所以，可高效率地將從 光源41a、41b發出之光射入於導光板32&、3 2b内，可提 高光之利用效率。另一方面，佔導光板32a、32b之大部 分區域的導光板本體83之厚度變薄，所以，可將重疊導 光板32a、32b彼此而構成之導光體32的厚度減薄。又， 因將位於光導入部82與導光板本體83之間的光移行部84 的上面作成斜面88，所以，一面可在平坦面85及斜面88 使射入於光導入部82之光進行全反射，一面可高效率地 將光引導至導光板本體83。 另外’於此面光源裝置8 1中’如第！ 2(a)圖所示，自 左側用光源41 a射出之光，射入導光板32&内，作為左側照 明光38a而自導光板32a射出，同時自導光板32a之斜面88 漏出的光，自傾斜面34b射入導光板32b内，同樣作為左 側照明光38a而自導光板32b射出。同樣，自右側用光源 41b射出之光’射入導光板32b内，作為右側照明光3扑而 自導光板32b射出，同時自導光板3 2b之斜面以漏出的光 ’自傾斜面34a射入導光板32a内，同樣作為右側照明光38b 而自導光板32a射出。藉此，藉由對漏光進行再利用，可 提尚光之利用效率’可提高面光源裝置81之亮度。 -20- 201232119 另外’如第12(B)圖所示，可使射入傾斜面34a、34b 之光分別於傾斜面34a、34b進行全反射而使這些光朝向 光吸收構件35a、35b的方向，而由光吸收構件35a、35b 所吸收。又，未由光吸收構件35a、3513吸收而被反射之 光3 9a、39b ’可自傾斜面34a、34b朝外部射出。因此， 可進一步減少導光板32a、32b内之返回光，在使用於立 體顯示裝置時，可減低串擾，將立體影像明亮化。 另外，如第12(C)圖所示，自導光板32b的斜面88漏 出並自傾斜面34a射入導光板32a内之光當中的直接穿透 導光板3 2 a的端部之光（以雙點劃線之箭頭所示），具有在 面光源裝置81之有效發光區域的邊緣產生亮線而使得面 光源裝置8 1之品質降低的擔憂。然而，於面光源裝置8 i 中’此種光可由導光板32a之光吸收構件3 5a所吸收，所 以’可防止有效發光區域的邊緣發亮的現象，可提高面 光源裝置8 1之品質。 另外’於此面光源裝置81中，因為於導光板32a、32b 之前面或背面設置光吸收構件35a、35b，所以，與在傾 斜面設置光吸收構件之情況比較，可穩定光吸收構件35a 、35b的光吸收能，可提高面光源裝置81之生產性。 (第3.實施例之變化例） 第1 3圖為顯示使用於第3實施例之面光源裝置8丨的 導光板32a(或導光板32b)的另一例之立體圖。另外，第 13圖中一併顯示V槽89之截面。在第13圖之導光板32a( 或導光板32b)中’沿光移行部§4之斜面88相互平行且連 續地排列有多個微細之V槽89。在使用此種導光板32a、 -21- 201232119 32b之情況下，可藉由V槽89使自光導入部82側射入斜面 88之光往回反射，所以，可減少在將射入光導入部82之 光朝導光板本體83導光之途中從斜面88洩漏的光，從而 可提高光之利用效率。藉此，可提高面光源裝置Μ之真 度。 第14圖為顯示使用於第3實施例之面光源裝置8丨的 導光板32a(或導光板32b)的另一例之立體圖。在第14圖 之導光板32a(或導光板32b)中，於各個左側用光源41a( 或右側用光源41b)之前方，且於光移行部84之斜面以形 成有呈大致扇形的圖案區域90。於各圖案區域9〇中呈放 射狀形成有多個微細之V槽89。當從垂直於本體平面部87 之方向觀察時’各左側用光源4 1 a(或右側用光源4丨b)前 方之V槽89 ’係以各左側用光源41a(或右側用光源41b) 之發光點或其附近的點為中心而形成為放射狀。在使用 第14圖所示之導光板32a、32b之情況下，亦可藉由v槽89 使自光射入端面33a射入斜面88之光往回反射，所以，可 減少在將自光射入端面33a、33b射入的光朝導光板本體 83導光之迷中從斜面μ洩漏的光，從而可提高光之利用 效率。藉此’可提高面光源裝置81之亮度。尤其是在使 用LED光源作為左側用光源4 1 a、右側用光源4 i b的情況 下，以使用此種導光板較為適宜。 又在第14圖之導光板32a、32b中，雖未設置光導 入部82，但亦可於導光板32a、32b之端部設置光導入部 82 ° 第1 5圖為顯示使用於第3實施例之面光源裝置8 1的 -22- 201232119 導光板32a(或導光板32b)的再另一例之立體圖。在第η 圖之導光板32a(或導光板32b)中，在與各左側用光源仏（ 或各右側用光源4ib)對應之位置，於光移行部84之斜面 88設有呈大致半圓錐台形的膨突部9丨。於膨突部9 1之外 周面連續地形成有多個v槽92。在此種導光板32a、3孔 中，當從垂直於導光板32a、32b之方向觀察時，各¥槽92 係以各光源41a、41b為中心而排列成放射狀，所以，可 減少在將射入光導入部82之光朝導光板本體83導光之途 中從斜面88浪漏的光，從而可進一步提高光之利用效率 (第4實施例） 第16圖為顯示本發明之第4實施例之面光源裝置％ 的概要刮視圖。於此面光源裝置96中，將前面側之導光 板32a設計成與第3實施例之面光源裝置31的情況為表背 面相反。有關其他方面，則與第3實施例之情況相同。 於第4實施例之面光源裝置96中，如第17(A)圖所示 藉由對來自斜面8 8之漏光進行再利用，可提高光之利 用效率’可提高面光源裝置96之亮度。 另外’如第17(B)圖所示，可使射入傾斜面34a、34b 之光於傾斜面34a、34b進行全反射而由光吸收構件35a 、35b所吸收，因而可減少導光板32a、32b内之返回光， 在使用於立體顯示裝置時’可減低串擾，將立體圖像明 儿化。又’如第1 7 (C)圖所示，即使是在光未由光吸收構 件3 5a、35b所吸收的情況下，仍可使光吸收構件35a、35b 反射之光自傾斜面34a、34b朝外部射出，進一步減少導 -23- 201232119 光板3 2a、3 2b内之返回光， 70在使用於立體顯示裝置時， 可減低串擾，將立體圖像明亮化。 另外，於此面光源裝窨Q 士 _ > 置96中，因為於導光板32a、32b 之刖面或月面設置光吸收禮也 又構件35a、35b，所以，與在傾 斜面設置光吸收構件之情況士的~r從〜 丨月况比較，可穩定光吸收構件35a 、3 5b的光吸收能’提高面光源裝置％之生產性。 (第5實施例） 第1 8圖為構成第5實施例之面伞 歹J之面先源裝置的導光板32a 或3 2b的立體圖。於此導光柘 尤板32a、32b中，於傾斜面34a 、34b形成有截面鋸齒形之 心凹凸圖案101。凹凸圖案101 係沿傾斜面3 4 a、3 4 b之寬声古— 見度方向以每一規定間距排列截 面呈V字形的峰形突起而成者， 战考各峰形突起係沿傾斜面 3 4 a.、3 4 b之傾斜方向且右土6 W乃Π，、有均勻的截面形狀。另外，構成 此凹凸圖案1 〇 1之峰开4 φΛ 卞 I嗶办大起係形成為頂角小於45。之銳角 的突起。 月 根據此種導光板32a、32b，射入構成凹凸圖案ι〇ι 之峰形大起的一側之斜面的光，於此斜面進行全反射後 朝對向的另一側之斜面射入，並自另一側之斜面朝導光 板32a、32b的外部射出。藉此，根據^實施例，可進— 步減少在傾斜面34a、34b反射後所返回之返回光可減 低串擾。 又，於上述各實施例中，雖顯示了具有大致均勻之 厚度的平板狀導光板，但該導光板32a、32b亦可為作成 楔形之導光板（參照第丨圖）。 (其他） -24- 201232119 誠如在第5實施例所作之說明，僅於導光板之端面嗖 置截面鋸齒形之凹凸圖案，亦可減少返回光及抑制串擾 。因此’於具備第一導光板、以與該第一導光板之一端 的端面對向的方式配置之光源、第二導光板、及以與該 第一導光板之一端的端面對向的方式配置之光源，並使 該第一導光板與該第二導光板重疊而構成導光體的面光 ^裝置中，即使為在位於與該第一導光板及第二導光板 S中至少一導光板的光源配置側端面相反側之端面設置 截面鋸齒形之凹凸圖案的面光源裝置，仍可減少返回光 及抑制串擾。 例如’於第i9(A)圖所示之導光板32a、3几中，將與 光射入端面33a、33b對向之端面作成傾斜面34a、34/，、 ^ ^傾斜面34a、3扑形成截面鋸齒形之凹凸圖案1〇1(無 淪是在導光板32a、32b之前面還是背面均不設置光吸收 構件）。又，如第19(B)圖戶斤示，亦可於此凹凸圖案ι〇ι之 表面塗布光吸收構件35a、35b。 另外，於第20(A)圖所示之導光板32a、3几中，在與 光射入端面33a、33b平行之端面形成截面鋸齒形之凹’凸 圖案1〇卜又，如第2_圖所示可於形成有此凹凸 圖案之位置，且於導光板32a、32b之前面或背面塗布 光吸收構件35a、35b。 【圖式簡單說明】 第UA)圖為顯示專利文獻！所揭示之立體顯示裝置 的構造之概要圖。第1(B)圖為說明在第1(A)圖之立體顯 示裝置產生串擾的理由之說明圖。 -25- 裝置的立體 裝置之概要 之立體圖 光 201232119 第2 (A)圖為顯示專利文獻2所揭示之面光源裝置 概要圖。第2(B)圖為在第2(A)圖之面光源裝置中射出 回光時的狀態之示意圖。 第3圖為本發明之第1實施例的面光源裝置之立體g 第4圖為第1實施例之面光源裝置的分解立體圖。 第5(A)及第5(B)圖為說明第i實施例之面光源裝 中的光的動作之說明圖。 ’ -_， 1的槪要剖視圈 第7(A)圖為傾斜面之傾斜角與在傾斜面 之返回光的比例之間的關係之示意 7(A)圖之說明圖。 弟7(Β)圖 _第8圖為顯示使用第1實施例之面光源 不裝置之一例之概要剖視圖。 第9圖為本發明之笛,— 个赞月之第2實施例的面光源 第1 〇圖為本發明之第 剖視圖。 弟3 κ施例的面光源裝置之概 第11圖為辱苞千Y击田 道土』 *' 用於第3實施例之面光调社 導先板的立體圖。 九源裝置的 第 12(A)、第 面#，、语驻罢， （）及第12(C)圖為說明第3 _光源裝置的作用效果之— 貫知例 〈說明圖。 第13圖為使用於第 體圖。 、3實施例之變化例的導光板之 第14圖為使用於 ^ 3貫施例之變化例的另一 導 的 返 I ° 置 回 第 顯 剖 要 之 立 板 '26- 201232119 第1 5圖為使用於第3實施例之變化例的再另一導光 板之立體圖。 第1 6圖為本發明之第4實施例的面光源裝置之概要 剖視圖。 第17(A)、第17(B)及第17(C)圖為說明第4實施例之 面光源裝置的作用效果之說明圖。 第1 8圖為顯示使用於第5實施例之面光源裝置的一 導光板的立體圖。 第1 9(A)圖為顯示使用於參考例之面光源裝置的一 導光板的立體圖。第19(B)圖為顯示使用於另一參考例之 面光源裝置的一導光板的立體圖。 第20(A)圖為顯示使用於另一參考例之面光源裝置 的一導光板的立體圖。第20(B)圖為顯示使用於再另一參 考例之面光源裝置的一導光板的立體圖。 【主要元件符號說明】 31 > 71 、 81 、 96 面 光 源 裝 置 32a 、32b '導 光 板 32 導 光 體 33a ' 33b 光 射 入 端 面 34a ' 34b 傾 斜 面 3 5a 、35b 光 吸 收 構件 36 低 折 射 率 層 37a 、37b 擴 散 圖 案 38a 左 側 昭 明 光 38b 右 側 照 明 光 -27- 201232119 39a 、 39b 光 40 反射構件 41a 左側用光源 41b 右側用光源 42 LED晶片 43 透明樹脂 44 覆被部 45a 、 45b 可撓性印刷電路基板 51 立體顯示裝置 52 框形雙面膠帶 53 光學片 53a 稜鏡狀圖案 53b 透鏡狀圖案 54 液晶面板 55a 左眼 55b 右眼 56 同步驅動裝置 61 導光板 62 傾斜面 63 光吸收構件 64 射出光 65 光 82 光導入部 83 導光板本體 84 光移行部 -28- 201232119 85 平坦面 86 突平面 87 本體平面部 88 斜面 89 V槽 90 圖案區域 91 膨突部 92 V槽 101 凹凸圖案 -29-Another embodiment of the lunar surface light source device has a pre-capture, f-feed & tilt angle of 15. Above and 65. Hereinafter, it is necessary to incline the above-mentioned inclined surface and 65 〇 or less, and the inclined angle 15 of the inclined surface. The following can reduce the ratio of the light of I to the inclined surface of the β 1 plate and return to the second guide. In another embodiment, the first light guide plate and the first element plate are respectively the light source of the light source region (2) a portion having a thickness closer to the portion h of the light plate than the portion of the light guide plate and having a thickness thicker than the conductor and a portion of the light guide plate body that is thicker than the light guide plate body toward the front plate may be self-lighting in a portion having a thicker thickness = Therefore, in the first plate and toward the thin guide body of the light guide: the thickness of the face light (four) can also increase the brightness of the light-emitting area. 4 , in addition, in this embodiment, the light source may be arranged along the first light guide plate of the first light guide plate. “, the plurality of light sources are disposed on the surface of the second v 罝 side, and the surface is respectively arranged to correspond to the light sources. In the above-mentioned inclined surface, the V-grooves are arranged in a radial pattern. The light is not easily applied from the inclined region toward the light guiding portion of the light guide plate according to the foregoing embodiment. The external high light utilization efficiency can be increased. In addition, in the embodiment, the first light guide plate is thicker than the first light guide plate body, and can also be in front of the second tomb #,, ^ A The surface on the opposite side of the board protrudes from the light guide plate body of the first light guide plate, and the surface of the second light guide plate 201232119 on the side opposite to the side of the light guide plate main body is also from the front portion. According to the foregoing embodiment, the light guide plate body of the first light plate protrudes inward, so that the protruding portions of the light plate are mutually thinner toward the present invention. Bump (four). According to the month The inclined surface is formed with a concave surface and a pattern to make the light easy to be:::; column: leaking toward the outside due to the inclined surface of the inclined surface. Thereby, it can be reduced; >, reflected on the inclined surface and returned to the device Crosstalk at the time. ... can be suppressed for use in stereoscopic display: surface light in accordance with the present invention. End face on the opposite side of the standing source according to the present invention ('The stereoscopic display device of the present invention is characterized by the front side of the source device By disposing the optical sheet and the liquid crystal panel display device, it is possible to reduce the return light reflected back and reflected by the light guide plate and the light inclined surface, thereby generating a bright stereoscopic image. Further, the means for solving the above problems of the present invention The present invention has various features in which the above-described constituent elements are combined as appropriate. The present invention can be variously changed according to the combination of the above-described constituent elements. [Embodiment] [Embodiment of the Invention] Hereinafter, a comparison of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and various designs and changes can be made without departing from the spirit and scope of the invention. (First Embodiment) First, the structure of the surface light source device 3 1 according to the first embodiment of the present invention will be described with reference to the third, fourth and fifth drawings. Fig. 3 is a view showing the -10-201232119 of the i-th embodiment. Fig. 4 is an exploded perspective view of the surface light source device 31. (Fig. 4 shows a state in which the front side light guide plate is rotated by 8 〇.) 5(A) and 5(B) The figure is an operation diagram of the surface light source device. In the surface light source device 31 shown in FIGS. 3 and 4, the light guide plate 32a (one of the first light guide plate and the second light guide plate) is The light guide plate 32b (the other light guide plate of the first light guide plate and the second light guide plate) is formed to form the light guide body 32. The light guide plate 323 and the light guide plate 32] 3 are made of polycrystalline analytic resin. A light-transmitting resin having a high refractive index such as a methyl methacrylate resin is molded into a flat plate shape which is uniform except for one end portion. An inclined surface 34 n is formed on the end surface of the light guide plate 32a opposite to the light incident end surface 33a in the entire width direction of the light guide plate 32a. This inclined surface 34a is inclined so as to approach the front surface from the back surface of the light guide plate 32& as it goes away from the light incident end surface 33a. The front surface (light exit surface)' of the light guide plate 32a faces the region where the inclined surface 34a is formed, and the light absorbing member 35a is provided over the entire width direction of the light guide plate 32a. The light absorbing member 35a can be formed by applying a black ink or a black tape to the light guide plate 32a, for example, by using a material having a high light absorptivity. Similarly, the end surface ' on the opposite side to the light incident end surface 33b of the light guide plate 32b is formed with an inclined surface 34t> in the entire width direction of the light guide plate 32b. The inclined surface 34b is inclined so as to gradually approach the back surface of the light guide plate 32b as it goes away from the light incident end surface 33b. The light absorbing member 35b is provided on the back surface of the light guide plate 3 2 b (the surface opposite to the light exit surface) opposite to the region where the inclined surface 34b is formed, and in the entire width direction of the light guide plate 32b. The light absorbing member 35b may be formed of a material having a high light absorptivity, for example, 201232119, which is coated with black ink or a black tape on the light guide plate 32b. Further, at least one of the front surface and the back surface of the light guide plates 32a and 32b is formed with a plurality of minute diffusion patterns 37a and 37b which are convex or concave (see Fig. 5). As shown in FIG. 3, the light guide plate 32a and the light guide plate 32b are respectively disposed on the opposite sides of the inclined surfaces 3 4 a and 3 4 b, and the front surface of the light guide plate 3 2 a and the front surface of the light guide plate 32b are mutually opposed. The way to face overlap. However, the light guide plate 32a and the light guide plate 32b are not directly bonded, but are separated by a low refractive index layer 36 having a refractive index smaller than that of the two light guide plates 32a and 32b (for example, an air layer, a transparent adhesive layer, a transparent liquid layer, etc.) ) to overlap. A reflection member 4A is disposed on the back surface of the light guide body 32. The reflecting member 4 is formed of a white tree moon slab or a metal, which is formed by a material that reflects the reflectivity, and is used to reflect light leaking from the back surface of the light guiding body 32 and then incident on the light guiding body 3 . Two people 'which can reduce light leakage' improve light utilization efficiency. The left side light source 4 1 a and the right side light source 4 1 b are each composed of an LED light source. That is, in the two light sources 41a, 4 lb, as shown in Fig. 5(A), the LED wafer 42 is encapsulated in the transparent resin 43, except for the front surface (light exit window) of the transparent resin 43, Both are covered by a covering portion 44 made of a white resin. Therefore, when the LED chip 42 is caused to emit light, light is emitted from the front surface of each of the light sources 41a and 41b. The left side light source 41a is attached to the flexible printed circuit board 45a one or more. As shown in Fig. 5(A), the flexible printed circuit board 45a may be located on the front side of the left side light source 41a. It can also be located on the left side of the light source 4U on the left side. The right side light source 41b is mounted on the other flexible printed circuit board 45b one or more. As shown in FIG. 5(A), the flexible printed circuit board 45b-12-201232119 can be located on the right side. The rear side of the light source 4 1 b may also be located on the front side of the light source 4 1 b on the right side. The left side light source 41a is disposed such that the light exiting window and the light guide plate 32a are incident on the end surface 3 3 a. Similarly, the right side light source 4 1 b is disposed such that the light exit window and the light incident surface 33b of the light guide plate 32b oppose each other. The left side light source 4 1 a and the right side light source 4 1 b are controlled so as to be repeatedly turned on or off in a predetermined cycle. Further, as the left side light source 4 1 a and the right side light source 4 1 b, a cold cathode negative tube may be used instead of the LED light source. Next, the operation of the light in the surface light source device 3 1 having the above configuration will be described. When light is emitted from the left side light source 41a, the light is incident on the light guide plate 32a from the light incident end surface 33a, and is guided inside the light guide plate 32& while being repeatedly reflected on the front surface and the back surface of the light guide plate 32a. Light. When the light guided in the light guide plate 32a is reflected by the diffusion pattern 37a provided on the back surface of the light guide plate 32a, and incident on the front surface of the light guide plate 32a at an incident angle smaller than the critical angle of total reflection (or When it is reflected by the diffusion pattern 3 7a provided on the four faces of 32a), it is emitted obliquely forward from the surface light source device 31 to the left side in accordance with the left illumination light 38a as shown in Fig. 5(A). Similarly, when the light emitted from the right side light source 41b and guided in the light guide plate 32a is expanded or reflected by the diffusion pattern provided on the front surface or the back surface of the light guide plate 32a, 'according to the fifth (a) The manner of the right side illumination light 38b is shown to be emitted obliquely forward from the surface light source device. As shown in the "A" figure, the left side illumination light 38a and the right side illumination light 38b are inclined toward the opposite side with respect to the normal direction perpendicular to the front surface of the light guide plate 32a, as will be described later as the optimum light for generating a stereoscopic image. -13-201232119 On the other hand, a part of the light that is guided by the light guide plates 32a and 32b and incident on the inclined surfaces 34a and 34b leaks from the inclined surface 34&, and leaks toward the outside, and a part of the light is on the inclined surface 34a. The servant is totally reflected. The light that is totally reflected on the inclined surface 34a is guided to the front surface of the light guide plate 32& and the light that is totally reflected on the inclined surface 34b is guided to the back surface of the light guide plate 32b and is respectively received by the light absorbing member 3. 5 a, 3 5 b are absorbed. Further, the light that is not completely absorbed by the light absorbing members 35a and 35b is reflected, and the light 39a, 39b shown in Fig. 5(B) penetrates the inclined faces 34a, 34b. 6 is a comparative example of the present embodiment, which shows only one light guide plate 61. In this comparative example, the end surface of the light guide plate 倾斜 is inclined, and the light absorbing member is disposed on the inclined surface 62. 63. Therefore, reaching the light of the inclined surface 62 The light 65 that is not absorbed by the light absorbing member 63 and reflected on the inclined surface 62 is repeatedly reflected on the back surface or the inclined surface 62 of the light guide plate 61, thereby being opposite to the direction of the emitted light 64 for generating a stereoscopic image. Therefore, in the case of the comparative example in which the light absorbing member 63 is provided on the inclined surface 62, the light 65 that is not absorbed by the light absorbing member 63 is emitted in a direction opposite to the light 64 in the original emission direction, and thus is emitted. The stereoscopic display device generates crosstalk. In contrast, in the case of the surface light source device 3 of the present embodiment, light that is not absorbed by the light absorbing members 35a and 35b penetrates the inclined faces 34a and 34b and leaks toward the outside. Therefore, it becomes less likely to be emitted from the front surface of the light guide plate 32a'32b, and thus it is less likely to cause disturbance. Further, in the surface light source device 31, the light absorbing members 35a, 35b are provided on the front or back surface of the light guide plates 32a, 32b. Therefore, compared with the case where the light absorbing member is provided on the inclined surface as in the comparative example, the light absorbing energy of the light absorbing members 35a, 35b - 14 - 201232119 can be stabilized, and the productivity of the surface light source device 3 can be improved. (A) shows the relationship between the inclination angle α of the inclined surfaces 34a and 3 and the ratio of the returning light reflected by the inclined surfaces 34a and 34b (simulation result). For example, the light incident on the inclined surface 34b, for example, As shown in Fig. 7(B), a part of the light directly penetrates the inclined surface 34b and leaks to the outside, and a part of the light is absorbed by the light absorbing member 35b after being reflected by the inclined surface 34b. Further, the light is also reflected by the light absorbing member 35b. , once again into the sloping face state, and penetrate the inclined surface 3 4b and facing the outside: taboo α initial "哔 leaked out. Further, a part of the light (light shown by a broken line arrow) is reflected by the inclined surface 34b to become return light. The ratio of the returning light indicated by the vertical axis of the seventh (α) diagram refers to the amount of light indicating the returning light which is reflected by the inclined surface 3 4a 3 4b and returned in the original direction as a percentage, and the light incident on the inclined surfaces 34a, 34b. The ratio of the amount of light. In addition, the inclination angle α of the inclined surfaces "a, 34b" is measured from the light guide plate 32&, the front surface or the back surface of the three holes, as shown in Fig. 7(A), if the inclination angles of the inclined surfaces 34 & When 疋 is 15 or more and 65 or less, the ratio of the returning light can be reduced, and the light which is the cause of the crosstalk can be reduced. Further, the relationship of the seventh (A) diagram does not change due to the thickness of the light guide plate 32a, and As long as it is a light absorbing member that is generally used, it is hardly entangled by the material of the light absorbing members 35a, 3". Thereby, the inclination angle α of the inclined faces 34a and 3 is 15°$α$65. More suitable. In particular, in order to shorten the width a of the light absorbing members 35b and to enlarge the effective light-emitting area of the surface light source device 31, the inclination angles 倾斜^ of the inclined surfaces 34a and 34b are substantially 45. Most suitable. Further, the width a of the light absorbing members 35a and 35b may be short or long as long as it is close to the width b of the inclined surface 34a in the horizontal direction. In the case of the display panel for a mobile phone of the same type as -15 to 201232119, there is no problem even if the width a of the light absorbing members 35a and 35b is 0.5 mm or less. Fig. 8 shows the configuration of the stereoscopic display device 51 using the surface light source device 31. In the stereoscopic display device 51, the optical sheet 53 is overlapped on the front surface of the light guide body 32, and a frame-shaped double-sided tape 52 is bonded to the optical sheet 53. The frame-shaped double-sided tape 52 is a light absorbing member formed of a black adhesive tape or the like, and is provided with an opening in a region corresponding to the effective light-emitting region of the light guide body 32, and covers the periphery of the light guide body 32. . Further, a liquid crystal panel 54 is superposed on the front side of the opening of the frame-shaped double-sided tape 52. The optical sheet 53 has a prismatic pattern 53a having a fine triangular ridge shape formed on the back surface thereof, and a lenticular pattern 53b having a fine convex lens shape is formed on the front surface. The meandering pattern 53a and the lenticular pattern 53b have a uniform cross-sectional shape perpendicular to the width direction (Y direction) of the light guiding plates 32a and 32b, and are respectively along the longitudinal direction (X direction) of the light guiding plates 32a and 32b. Arranged by - spacing. However, the arrangement pitch of the lenticular patterns 53b is slightly larger than the arrangement pitch of the prismatic patterns 53a. The ridge pattern 53 3a is disposed symmetrically with respect to a plane perpendicular to the X direction passing through the center of the optical sheet 53. The lenticular pattern 53b is also perpendicular to the X direction passing through the center of the optical sheet μ. The faces are configured in a symmetrical manner. The liquid crystal panel 54 is an old-fashioned image of the image when the viewer observes the right eye (the right eye p image) and the image when the left eye is viewed (the image for the left eye). Eight controls. Further, in Fig. 7, the thick direction of the light guide plates 3 2a and 3 2b is displayed in the Z direction. The left eye/right eye image of the liquid crystal panel 54 and the left side light source * and the right side light source 41b are turned on/off, and are synchronously controlled by the synchronous driving device -16-201232119. The synchronous driving device 56 causes the left-eye image and the right-eye image to be alternately displayed on the liquid crystal panel 54 and the left-eye image of the liquid crystal panel 54 so that the observer cannot recognize the degree of switching between the left and right circular images. The left side light source 4U is turned on in synchronization (the right side light source 41b is turned off), and the right side light source 41b is turned on in synchronization with the right eye image (the left side light source 4 1 a is turned off). When the right side light source 41b is turned on, the light (white light) emitted from the right side light source 41b is emitted as the right side illumination light 38b whose maximum intensity direction is concentrated, and the entire effective light emitting area of the light guide body 32 is obliquely forwardly directed rightward. The right illumination light 38b emitted from the light guide 32 is focused on the right eye 55b of the observer positioned at a predetermined distance from the liquid crystal panel 54 so that the light passing through each pixel is changed by the optical sheet 53 after the direction is changed. Inject into the LCD panel μ. The right illumination light 38b is converted into a right-eye image by penetrating the liquid crystal panel 54, and is recognized by the observer's right eye 55b. Similarly, when the light source 4 1 a is lit on the left side of the s, the light (white light) emitted from the light source 4 ia from the left side is used as the left side illumination light 38a of the maximum intensity direction set t, and the entire effective light-emitting area of the light guide body 32 is directed toward Shoot left obliquely forward. The left illumination light 38a emitted from the light guide 32 is incident on the liquid crystal panel 54 by changing the direction of the optical sheet 53 so that the light penetrating the pixels is concentrated on the left eye 55a of the observer. The left illumination light 38a is converted into a left eye image by penetrating the liquid crystal panel 54, and is recognized by the observer's left eye 55a. At this time, by the operation of the optical sheet 53, the left illumination light 38a' incident on the meander pattern 53a changes the direction of the light by the meander pattern 53a, and passes through the lens when passing through the lenticular pattern 531). The pattern 53b is bent in the direction of the left eye -17-201232119 55a, and is concentrated on the left eye 55a by passing through the lenticular pattern 5 。. The right side illumination light 38b is concentrated on the right eye 55b by passing through the optical sheet 53 by the same operation. Thus, the left eye image and the right eye image are alternately transported to the observer's left eye 55a and right eye 55b, but by the afterimage effect, the observer can simultaneously recognize the right eye image and The image for the left eye is thus recognizable as a three-dimensional image (stereoscopic image). On the other hand, the light reflected by the inclined faces 34a, 3b of the light guide plates 32a, 32b is absorbed by the light absorbing members 35a, 35b, and the light absorbing members 35a, 35b are also reflected by the light 39a' 39b. Then, the inclined surface 3 4 a, 3 4 b is again incident, and the crosstalk is suppressed, and the crosstalk is suppressed on the stereo image of the back 51 caused by the crosstalk. The faces 34a, 34b leak toward the outside. In the case of the three-dimensional display device, the stereoscopic image is brightened. (Second embodiment) FIG. 9 is a schematic cross-sectional view showing a surface light source device 7 according to a second embodiment of the present invention. In the surface light source device 71, the light guide plate 32a on the front side is designed to be opposite to the front and back surfaces of the surface light source device 31 of the first embodiment. The other aspects are the same as those in the first embodiment. In such a surface light source device 7A, the same effect as that of the surface light source chipping 31 can be obtained. When used in a stereoscopic display device, crosstalk can be reduced. (Third embodiment) Fig. 10 is a schematic cross-sectional view showing a surface light source device 8 according to a third embodiment of the present invention. The light guide plates 32a and 32b used in the surface light source device 8 are different in shape from those of the light guide plates 32a and 32b of the surface light source device 31 of the i-th embodiment as shown in Fig. 1 . As shown in Fig. 11, the light guide plates 32a and 32b used in the surface light source device 81 are a light-introducing portion 82 having a thick thickness, a light guide plate main body 83 having a small thickness, a light-introducing portion 82, and a light guide plate. The light transition portion 84 (inclined region) between the bodies 83 is formed. The front surface of the light guide plate 32 & and the back surface of the light guide plate 3 is a flat surface 85, and the surface of the light introduction portion 82 opposed to the flat surface 85 is a projection plane 86 substantially parallel to the flat surface 85, and the light guide plate body is flat and flat. The surface on which the surface 85 faces is a main body plane portion 87 that is substantially parallel to the flat surface 85. The surface of the light transition portion 84 that faces the flat surface 85 is a slope 88 that is inclined toward the body plane portion 87 from the protrusion plane 86. Further, inclined faces 34 & 34b are formed on the end faces of the light guide plate main body 83 of the light guide plates 32a and 32b, respectively, and the inclined faces 34a and 3 are attached to the body plane portion of the light guide plate main body 83 as moving away from the light introducing portion 82. The 87 side is gradually inclined toward the flat surface 85. At the end of the flat surface 85, strip-shaped light absorbing members 35a and 35b are provided so as to face the inclined surfaces 34a and 34b. The thickness of the light introducing portion 82 is configured to be thicker than the height of the light exit windows of the left side light source 4ia and the right side light source 41b, and is thinner than the heights of the light source 4a and the light source 4'b. A plurality of fine diffusion patterns for emitting light toward the front side from the light guide main body 83 are formed on one of the flat surface 85 of the light guide plate main body 83 and the main surface flat portion 87 (for example, a triangular shape is recessed in a cross section) The braided pattern or the like is arranged in a parallel or arc shape. As shown in Fig. 11, the light guide plate 32a and the light guide plate 32b are such that the light guide plate 32a is turned upside down, and the light introduction portion 82 side and the light guide plate main body 83 are located on opposite sides of each other, and the light guide plate is interposed between the low refractive index layers. The body plane portions 87 of the body 83 are superposed on each other. Therefore, the protruding portions of the light guiding plates 32a -19- 201232119 or the light guiding plate 32b' light introducing portion 82 are directed toward the inner side without protruding beyond the outer surface of the light guiding body 32. The left side light source 41a is disposed so as to be incident on the light incident surface 33a of the light guide plate 32a on the light introduction portion 82 side, and the right side light source 41b is incident on the light entrance end surface of the light guide plate 3 on the side of the light introduction portion 82. 33b is configured in the opposite direction. In the surface light source device 81, since the thickness of the light introducing portion 82 is substantially equal to the height of each of the light sources 41a and 41b, the light emitted from the light sources 41a and 41b can be efficiently incident on the light guide plates 32&, 3 In 2b, the efficiency of light utilization can be improved. On the other hand, since the thickness of the light guide plate main body 83 which is a large portion of the light guide plates 32a and 32b is thin, the thickness of the light guide body 32 which is formed by overlapping the light guide plates 32a and 32b can be reduced. Further, since the upper surface of the light-transferring portion 84 between the light-introducing portion 82 and the light-guide plate main body 83 is formed as a slope 88, the light incident on the light-introducing portion 82 can be completely performed on the flat surface 85 and the inclined surface 88. Reflecting, one side can efficiently guide light to the light guide plate body 83. In addition, 'in the light source device 8 1' as in the first! As shown in Fig. 2(a), the light emitted from the light source 41a on the left side enters the light guide plate 32& and is emitted from the light guide plate 32a as the left side illumination light 38a, and the light leaked from the slope 88 of the light guide plate 32a. The self-tilting surface 34b enters the light guide plate 32b, and is also emitted from the light guide plate 32b as the left side illumination light 38a. Similarly, the light emitted from the right-side light source 41b enters the light guide plate 32b, and is emitted from the light guide plate 32b as the right illumination light 3, and the light leaked from the inclined surface of the light guide plate 3bb from the inclined surface 34a. The light guide plate 32a is also emitted from the light guide plate 32a as the right side illumination light 38b. Thereby, by utilizing the light leakage, the utilization efficiency of the light can be improved, and the brightness of the surface light source device 81 can be improved. -20- 201232119 Further, as shown in Fig. 12(B), the light incident on the inclined faces 34a and 34b can be totally reflected by the inclined faces 34a and 34b, and the light is directed toward the light absorbing members 35a and 35b. It is absorbed by the light absorbing members 35a, 35b. Further, the light 3 9a, 39b' which is not absorbed by the light absorbing members 35a, 3513 and reflected can be emitted to the outside from the inclined faces 34a, 34b. Therefore, the return light in the light guide plates 32a and 32b can be further reduced, and when used in a vertical display device, crosstalk can be reduced and the stereoscopic image can be brightened. Further, as shown in Fig. 12(C), the light which is leaked from the inclined surface 88 of the light guide plate 32b and which is incident into the light guide plate 32a from the inclined surface 34a directly penetrates the end portion of the light guide plate 32a ( The arrow of the two-dot chain line has a fear that a bright line is generated at the edge of the effective light-emitting area of the surface light source device 81, and the quality of the surface light source device 81 is lowered. However, in the surface light source device 8 i, such light can be absorbed by the light absorbing member 35a of the light guide plate 32a, so that the edge of the effective light-emitting region can be prevented from being bright, and the quality of the surface light source device 81 can be improved. Further, in the light source device 81, since the light absorbing members 35a and 35b are provided on the front surface or the back surface of the light guide plates 32a and 32b, the light absorbing member 35a can be stabilized as compared with the case where the light absorbing member is provided on the inclined surface. The light absorbing energy of 35b can improve the productivity of the surface light source device 81. (3. Variation of the embodiment) Fig. 1 is a perspective view showing another example of the light guide plate 32a (or the light guide plate 32b) used in the surface light source device 8A of the third embodiment. Further, the cross section of the V-groove 89 is shown together in Fig. 13. In the light guide plate 32a (or the light guide plate 32b) of Fig. 13, a plurality of fine V-grooves 89 are arranged in parallel with each other along the slope 88 of the light-shifting portion §4. When such a light guide plate 32a, -21-201232119 32b is used, the light incident on the inclined surface 88 from the light introduction portion 82 side can be reflected back by the V-groove 89, so that the introduction of the incident light can be reduced. The light of the portion 82 leaks light from the slope 88 in the middle of the light guiding of the light guide plate main body 83, thereby improving the light use efficiency. Thereby, the reliability of the surface light source device can be improved. Fig. 14 is a perspective view showing another example of the light guide plate 32a (or the light guide plate 32b) used in the surface light source device 8 of the third embodiment. In the light guide plate 32a (or the light guide plate 32b) of Fig. 14, in the front side of each of the left side light source 41a (or the right side light source 41b), and on the slope of the light transfer portion 84, a substantially fan-shaped pattern area 90 is formed. . A plurality of fine V-grooves 89 are formed in a pattern in each of the pattern regions 9A. When viewed from a direction perpendicular to the main body plane portion 87, the V groove 89' in front of each of the left side light source 4 1 a (or the right side light source 4 丨 b) is a left side light source 41a (or a right side light source 41b). The light-emitting point or a point in the vicinity thereof is formed radially. In the case where the light guide plates 32a and 32b shown in Fig. 14 are used, the light incident on the inclined surface 88 from the light incident end surface 33a can be reflected back by the v groove 89, so that the self-lighting can be reduced. The light incident on the entrance end faces 33a and 33b leaks light leaking from the inclined surface μ toward the light guide plate main body 83, thereby improving the light use efficiency. Thereby, the brightness of the surface light source device 81 can be increased. In particular, when an LED light source is used as the left side light source 4 1 a and the right side light source 4 i b , it is preferable to use such a light guide plate. Further, in the light guide plates 32a and 32b of Fig. 14, the light introduction portion 82 is not provided, but the light introduction portion 82 may be provided at the end portions of the light guide plates 32a and 32b. The fifth embodiment is shown for use in the third embodiment. A perspective view of still another example of the -22-201232119 light guide plate 32a (or the light guide plate 32b) of the surface light source device 8 1 of the example. In the light guide plate 32a (or the light guide plate 32b) of the nth figure, at the position corresponding to each of the left side light source 仏 (or each of the right side light sources 4ib), the inclined surface 88 of the light transfer portion 84 is provided in a substantially semi-tapered configuration. The bulging part is 9 丨. A plurality of v grooves 92 are continuously formed on the outer peripheral surface of the projecting portion 9 1 . In the holes of the light guide plates 32a and 3, when viewed from the direction perpendicular to the light guide plates 32a and 32b, the respective grooves 92 are arranged radially around the respective light sources 41a and 41b, so that the number of the grooves 92 can be reduced. The light incident on the light introducing portion 82 from the inclined surface 88 during the light guiding of the light guide plate main body 83 can further improve the light use efficiency (fourth embodiment). FIG. 16 is a view showing the fourth embodiment of the present invention. A schematic view of the surface light source device %. In the surface light source device 96, the front side light guide plate 32a is designed to be opposite to the front surface of the surface light source device 31 of the third embodiment. Other aspects are the same as those in the third embodiment. In the surface light source device 96 of the fourth embodiment, as shown in Fig. 17(A), by utilizing the light leakage from the inclined surface 88, the light utilization efficiency can be improved, and the brightness of the surface light source device 96 can be improved. Further, as shown in Fig. 17(B), the light incident on the inclined faces 34a and 34b can be totally reflected by the inclined faces 34a and 34b and absorbed by the light absorbing members 35a and 35b, so that the light guide plate 32a can be reduced. The return light in 32b, when used in a stereoscopic display device, can reduce crosstalk and brighten the stereoscopic image. Further, as shown in the seventh embodiment (C), even when the light is not absorbed by the light absorbing members 35a, 35b, the light absorbing members 35a, 35b can be reflected from the inclined faces 34a, 34b. The external light is emitted to further reduce the return light in the light guides 3 2a and 3 2b of the guide -23-201232119. When used in a stereoscopic display device, the crosstalk can be reduced and the stereoscopic image can be brightened. In addition, in the surface light source mounting device _ > 96, since the light absorbing members are provided on the kneading surface or the moon surface of the light guiding plates 32a and 32b, the members 35a and 35b are provided, so that light absorption is provided on the inclined surface. In the case of the condition of the member, the light absorption energy of the light absorbing members 35a and 35b can be stabilized to improve the productivity of the surface light source device. (Fifth Embodiment) Fig. 18 is a perspective view showing a light guide plate 32a or 32b which constitutes the surface source device of the surface umbrella 第J of the fifth embodiment. In the light guide plates 32a and 32b, a cross-sectional zigzag-shaped concave-convex pattern 101 is formed on the inclined faces 34a and 34b. The concavo-convex pattern 101 is formed by arranging peak-shaped protrusions having a V-shaped cross section at a predetermined pitch along the wide-sounding-viewing direction of the inclined surfaces 3 4 a, 3 4 b , and the peak-shaped protrusions along the inclined surface are tested. 3 4 a., 3 4 b is inclined and the right soil is 6 W, and has a uniform cross-sectional shape. Further, the peaks constituting the concave-convex pattern 1 〇 1 are opened 4 φ Λ 卞 I 大 大 大 形成 形成 。 。 。 。 。 。 。 。 。 。 。 。 。 The sharp corner of the protrusion. According to the light guide plates 32a and 32b, light incident on the inclined surface on the side where the peak shape of the concave-convex pattern ι〇ι is large is incident on the slope, and the slope is totally reflected and then incident on the other side of the opposite side. And it is emitted from the slope of the other side toward the outside of the light guide plates 32a, 32b. Thereby, according to the embodiment, the return light returned after the reflection of the inclined faces 34a, 34b can be further reduced to reduce the crosstalk. Further, in each of the above embodiments, a flat light guide plate having a substantially uniform thickness is shown, but the light guide plates 32a and 32b may be formed as a wedge-shaped light guide plate (see the second drawing). (Others) -24- 201232119 As explained in the fifth embodiment, the zigzag-shaped concave-convex pattern is disposed only on the end surface of the light guide plate, and the return light and the crosstalk can be reduced. Therefore, the light source, the second light guide plate, and the end surface opposite to one end of the first light guide plate are disposed on the first light guide plate and disposed opposite to the end surface of one end of the first light guide plate. a light source disposed in a manner, wherein the first light guide plate and the second light guide plate are overlapped to form a light guide body, and at least one of the first light guide plate and the second light guide plate S is disposed The surface light source device having the concave-convex pattern of the cross-sectional zigzag shape on the end surface on the opposite side of the light source side surface of the light guide plate can reduce the return light and suppress the crosstalk. For example, in the light guide plates 32a and 3 shown in the i9th (A) diagram, the end faces opposed to the light incident end faces 33a and 33b are inclined faces 34a, 34/, and ^^ inclined faces 34a and 3 A concavo-convex pattern 1〇1 having a zigzag shape is formed (no flaw is provided on the front surface or the back surface of the light guide plates 32a and 32b). Further, as shown in Fig. 19(B), the light absorbing members 35a and 35b may be coated on the surface of the embossed pattern ι〇ι. Further, in the light guide plates 32a and 3 shown in Fig. 20(A), a concave zigzag pattern 1 having a zigzag cross section is formed on the end faces parallel to the light incident end faces 33a and 33b, as in the second__ As shown in the figure, the light absorbing members 35a and 35b may be applied to the front surface or the back surface of the light guide plates 32a and 32b at the position where the uneven pattern is formed. [Simple description of the diagram] The figure UA) shows the patent documents! A schematic view of the construction of the disclosed stereoscopic display device. Fig. 1(B) is an explanatory view for explaining the reason why crosstalk is generated in the stereoscopic display device of Fig. 1(A). -25- Outline of Stereoscopic Device of Device Stereoscopic View Light 201232119 Fig. 2(A) is a schematic view showing a surface light source device disclosed in Patent Document 2. Fig. 2(B) is a view showing a state in which the return light is emitted from the surface light source device of Fig. 2(A). Fig. 3 is a perspective view of a surface light source device according to a first embodiment of the present invention. Fig. 4 is an exploded perspective view showing the surface light source device of the first embodiment. Figs. 5(A) and 5(B) are explanatory views for explaining the operation of light in the surface light source package of the i-th embodiment. ′-_, 1 is a sectional view. Fig. 7(A) is a diagram showing the relationship between the inclination angle of the inclined surface and the ratio of the returning light on the inclined surface. 7 (Β) diagram _ Fig. 8 is a schematic cross-sectional view showing an example of the use of the surface light source of the first embodiment. Fig. 9 is a view showing the surface light source of the second embodiment of the present invention, the first embodiment of the present invention. The outline of the surface light source device of the 3rd κ embodiment is shown in Fig. 11 is a perspective view of the light guide body of the third embodiment. The 12th (A), the first #, the syllabic, and the 12th (C) diagrams of the ninth source device are illustrative examples of the effects of the third _light source device. Figure 13 is a diagram for use in the body. Fig. 14 of the light guide plate according to a variation of the third embodiment is a return plate of another guide used in the variation of the embodiment, and the vertical plate of the first display is turned back to '26-201232119. It is a perspective view of still another light guide plate used in the modification of the third embodiment. Fig. 16 is a schematic cross-sectional view showing a surface light source device according to a fourth embodiment of the present invention. 17(A), 17(B) and 17(C) are explanatory views for explaining the operation and effect of the surface light source device of the fourth embodiment. Fig. 18 is a perspective view showing a light guide plate used in the surface light source device of the fifth embodiment. Fig. 19(A) is a perspective view showing a light guide plate used in the surface light source device of the reference example. Fig. 19(B) is a perspective view showing a light guide plate used in the surface light source device of another reference example. Fig. 20(A) is a perspective view showing a light guide plate used in the surface light source device of another reference example. Fig. 20(B) is a perspective view showing a light guide plate used in the surface light source device of still another reference example. [Major component symbol description] 31 > 71, 81, 96 surface light source device 32a, 32b 'light guide plate 32 light guide 33a' 33b light incident end face 34a' 34b inclined face 3 5a , 35b light absorbing member 36 low refractive index Layers 37a, 37b Diffusion pattern 38a Left side bright light 38b Right side illumination light -27- 201232119 39a, 39b Light 40 Reflecting member 41a Left side light source 41b Right side light source 42 LED wafer 43 Transparent resin 44 Covering parts 45a, 45b Flexible printing Circuit board 51 Stereoscopic display device 52 Frame-shaped double-sided tape 53 Optical sheet 53a Braided pattern 53b Lens pattern 54 Liquid crystal panel 55a Left eye 55b Right eye 56 Synchronous driving device 61 Light guide plate 62 Inclined surface 63 Light absorbing member 64 Light is emitted 65 Light 82 Light introduction part 83 Light guide plate main body 84 Light transfer part -28- 201232119 85 Flat surface 86 Projection plane 87 Main body plane part 88 Bevel 89 V groove 90 Pattern area 91 Expansion part 92 V groove 101 Concave pattern -29-

Claims (1)

201232119 七、申請專利範圍： 1. 一種面光源裝置，其係具備： 第一導光板； 以與前述第一導光板之一端的端面對向 置之光源； 第二導光板；及 以與前述第二導光板之一端的端面對向 置之光源； 其中，使前述第一導光板與前述第二導 而構成導光體； 前述面光源裝置之特徵為·· 前述第一導光板及前述第二導光板當中 導光板上的位於光源配置側端面的相反側之 傾斜面，其係以自垂直於前述導光板之表背 傾斜的方式傾斜；於前述導光板之表面或背 前述傾斜面對向的區域設置光吸收構件。 2 ·如申請專利範圍第1項之面光源裝置，其中， 一導光板與前述第二導光板重疊為，前述第 上之光源配置側的端面與前述第二導光板上 光源側的端面係位於同一側，且前述第一導 未配置光源側的端面與前述第二導光板中之 側的端面係位於同一側。 3 ·如申請專利範圍第1項之面光源裝置，其中， 面之傾斜角係1 5 °以上且6 5 °以下。 的方式配 的方式配 光板重疊 之至少一 端面為一 兩面的面 面當中與 將前述第 一導光板 之未配置 光板上之 光源配置 前述傾斜 -30- 201232119 4. 如申請專利範圍第1項之面光源裝置，其中， 導光板及前述第二導光板’係分別於光源配 面附近具有厚度比作為發光區域之導光板本 分’且於厚度比前述導光板本體厚的部分與 板本體之中間具有自厚度比前述導光板本體 起朝向前述導光板本體厚度逐漸變化之傾斜 5. 如申請專利範圍第4項之面光源裝置，其中， 一導光板及前述第二導光板上之光源配置側 別配置前述光源複數個，並形成分別與這些 而於前述傾斜區域的表面將v槽排列為放射 區域。 6. 如申請專利範圍第4項之面光源裝置，其中， 導光板上之比前述導光板本體厚之部分，係 第二導光板對向之側的面上自前述第一導光 板本體突出， 前述第二導光板上之比前述導光板本 :係在與前述第一導光板對向之侧的面上 導光板的導光板本體突出。 7. 如申請專利範圍第1項之面光 尤源裝置，其中 斜面形成有截面鑛齒形之凹 凸圖案。 8. —種立體顯示裝置，其特徵為. 於申請專利範圍第丨項少 貝之面光源裝置 光學片及液晶面板。 前述第_ 置側之嶸 體厚的部 前述導光 厚的部分 邑域。 沿前迷苐 的端面分 光源對應 狀之圖案 前述第— 在與前述 板的導光· 厚之部分 前述第二 於前述傾 前方配置 -31 ·201232119 VII. Patent application scope: 1. A surface light source device, comprising: a first light guide plate; a light source opposite to an end surface of one end of the first light guide plate; a second light guide plate; a light source facing the end surface of the second light guide plate; wherein the first light guide plate and the second light guide form a light guide; the surface light source device is characterized by: the first light guide plate and the An inclined surface of the second light guide plate on the opposite side of the light source arrangement side end surface of the light guide plate is inclined in a manner inclined from a front surface perpendicular to the front surface of the light guide plate; the front surface of the light guide plate or the back surface is inclined A light absorbing member is disposed in a region. The surface light source device of claim 1, wherein a light guide plate overlaps with the second light guide plate, wherein an end surface of the first light source arrangement side is located at an end surface of the second light guide plate on a light source side The same side, and the end surface of the first guide undisposed light source side and the end surface of the second light guide plate are located on the same side. 3. The surface light source device of claim 1, wherein the inclined angle of the surface is 1 5 ° or more and 65 ° or less. In a manner of at least one end surface of the light distribution plate overlapping, the light source on the undisposed light plate of the first light guide plate is disposed with the aforementioned inclination -30-201232119. 4. As claimed in claim 1 In the surface light source device, the light guide plate and the second light guide plate are respectively disposed in the vicinity of the light source matching surface to have a thickness ratio of the light guide plate serving as the light emitting region, and in the middle of the portion thicker than the light guide plate body and the plate body The surface light source device of the fourth embodiment of the present invention, wherein the surface of the light guide plate and the second light guide plate are disposed on the side of the light guide plate. A plurality of the light sources are disposed, and the v grooves are arranged as radiation regions on the surfaces of the inclined regions, respectively. 6. The surface light source device of claim 4, wherein a portion of the light guide plate that is thicker than the light guide plate body protrudes from the first light guide plate body on a side opposite to the second light guide plate. The light guide plate of the second light guide plate protrudes from the light guide plate body of the light guide plate on the side opposite to the first light guide plate. 7. The surface light source device of claim 1, wherein the inclined surface is formed with a concave and convex pattern of a cross-section mineral tooth shape. 8. A stereoscopic display device, characterized in that: in the patent application scope, the surface light source device optical sheet and the liquid crystal panel. The portion of the thickness of the first side of the first side is a portion of the thickness of the light guide. The pattern of the corresponding light source along the front end is divided into the above-mentioned section - the portion of the light guide and the thick portion of the front plate, the second portion of the front side of the tilting front -31
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