1330730 _ 099年07月12日修正替换頁. 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明關於一種導光板及應用該種導光板之面光源裝置 及顯示裝置。 【先前技術】 [0002] 近年來，手機之功能已從最初之語音業務拓展到附帶文 本及圖像之資料通信業務，手機顯示愈來愈精細，屏幕 愈來愈大，清晰度亦愈來愈高，且對輕巧外形之需求亦 持續增加。因此，雙屏式折疊手機成爲全球用戶傾向性 需求之一。據統計，2003年對折叠式手機之需求已占全 ® 球總需求之25%，隨著公眾對手機屏幕顯示、資料通信及 拍照功能之需求迅速增長，預計折叠式手機之需求量會 更大。 [0003] 一種習知之折疊式雙屏手機係採用一片導光板10及複數 光源13同時提供主屏（Main Panel)與副屏（Sub Pan-el)所需之背光，如第一圖所示係先前技術之雙屏手機光 線傳輸原理平面示意圖。該導光板10為平板狀，其包括 φ 一光入射面11及與該光入射面11相鄰之二光出射面12 ( 圖中僅示出其中一光出射面，另一位於其相對面，圖未 示出），其中該光入射面11為平滑表面。該光源13為發光 二極體（Light Emittering Diode，LED)，其位於該 光入射面11 一側，且兩兩相隔一定間距。 [0004] 當光源13點亮時，因該光入射面11為平滑表面，靠近各 光源13處之光線較強，而兩光源13間之區域光線較弱， 因此形成靠近光入射面11處顯示暗區14，影響顯示效果 094112048 表單編號A0101 第4頁/共20頁 0993248035-0 1330730 099年07月12日梭正替换頁 [0005] 有鑑於此，提供一種可消除顯示暗區、提高顯示效果之 雙面導光板，及應用該雙面導光板之面光源裝置與顯示 裝置實為必需。 [0006] 【發明内容】 以下，將以若干實施例說明一種可消除顯示暗區、提高 顯示效果之雙面導光板。 [0007] 又，通過這些實施例說明一種可消除顯示暗區、提高顯 示效果之面光源裝置。 [0008] 以及，通過這些實施例說明一種可消除顯示暗區、提高 顯示效果之顯示裝置。 [0009] 為實現上述内容，提供一種雙面導光板，其包括一光入 射面及與其相連之二光出射面，該光入射面存在微結構 ，該微結構包括複數上微結構與下微結構，且上微結構 與下微結構錐頂相接而形成雙錐結構。 .[0010] 該微結構包括複數上微結構與下微結構，且其以錐頂相 接。 [0011] 該上微結構與該下微結構分別可為角錐形或部分圓錐形 〇 [0012] 該上微結構與該下微結構可為相鄰非連續、上下非對稱 ，或為相鄰非連續、上下對稱，亦可為相鄰連續、上下 非對稱，還可為相鄰連續、上下對稱。 [0013] 又，提供一種面光源裝置，其包括一雙面導光板及複數 094112048 表單編號A0101 第5頁/共20頁 0993248035-0 1330730 _ 099年07月12日修正替換頁 光源，該雙面導光板包括一光入射面及與其相連之二光 出射面，該光源位於該光入射面一侧，該光入射面存在 微結構，該微結構包括複數上微結構與下微結構，且上 微結構與下微結構錐頂相接而形成雙錐結構。1330730 _ July 12, 2008, the revised replacement page. VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a light guide plate and a surface light source device and display device using the same. [Prior Art] [0002] In recent years, the function of mobile phones has expanded from the initial voice service to the data communication service with text and images. The display of mobile phones is getting more and more fine, the screen is getting bigger and bigger, and the definition is getting more and more. High, and the demand for lightweight shapes continues to increase. Therefore, the dual-screen folding mobile phone has become one of the global user preference requirements. According to statistics, the demand for folding mobile phones in 2003 has accounted for 25% of the total demand for mobile phones. With the rapid growth of demand for mobile screen display, data communication and camera functions, the demand for folding mobile phones is expected to be greater. . [0003] A conventional folding dual-screen mobile phone uses a light guide plate 10 and a plurality of light sources 13 to simultaneously provide backlights required for a main panel and a sub-panel, as shown in the first figure. The schematic diagram of the technology of the dual-screen mobile phone light transmission principle. The light guide plate 10 is in the form of a flat plate, and includes a light incident surface 11 and a two light exit surface 12 adjacent to the light incident surface 11 (only one light exit surface is shown in the figure, and the other is located on the opposite side thereof. The figure is not shown), wherein the light incident surface 11 is a smooth surface. The light source 13 is a Light Emitting Diode (LED) located on the side of the light incident surface 11 and spaced apart from each other by a certain distance. When the light source 13 is lit, since the light incident surface 11 is a smooth surface, the light near the light sources 13 is strong, and the light between the two light sources 13 is weak, so that the light is incident near the light incident surface 11 Dark area 14, affecting the display effect 094112048 Form No. A0101 Page 4 / Total 20 pages 0993248035-0 1330730 July 12, 2007, the shuttle replacement page [0005] In view of this, it is provided to eliminate the display dark area and improve the display effect The double-sided light guide plate and the surface light source device and the display device using the double-sided light guide plate are necessary. SUMMARY OF THE INVENTION Hereinafter, a double-sided light guide plate capable of eliminating a dark area and improving a display effect will be described with reference to a plurality of embodiments. Further, by these embodiments, a surface light source device capable of eliminating the display dark area and improving the display effect will be described. [0008] Also, a display device capable of eliminating the display dark area and improving the display effect will be described by these embodiments. [0009] In order to achieve the above, a double-sided light guide plate is provided, which comprises a light incident surface and a two light exit surface connected thereto, wherein the light incident surface has a microstructure, and the microstructure comprises a plurality of upper microstructures and a lower microstructure. And the upper microstructure is connected to the top of the lower microstructure to form a double cone structure. [0010] The microstructure includes a plurality of upper and lower microstructures, and they are joined by a cone top. [0011] The upper microstructure and the lower microstructure may respectively be pyramidal or partially conical. [0012] The upper microstructure and the lower microstructure may be adjacent discontinuous, upper and lower asymmetrical, or adjacent non- Continuous, up and down symmetrical, or adjacent continuous, up and down asymmetrical, but also adjacent continuous, up and down symmetrical. [0013] Furthermore, a surface light source device is provided, which comprises a double-sided light guide plate and a plurality of 094112048 form number A0101 page 5 / total 20 pages 0993248035-0 1330730 _ July 12, 999 revised replacement page light source, the double-sided The light guide plate comprises a light incident surface and a two light exit surface connected thereto, the light source is located on a side of the light incident surface, and the light incident surface has a microstructure, the microstructure comprises a plurality of upper microstructures and a lower microstructure, and the micro The structure is connected to the top of the lower microstructure cone to form a double cone structure.
[0014] 以及，提供一種顯示裝置，其包括一雙面導光板、複數 光源、一主屏顯示模組及一副屏顯示模組，該雙面導光 板包括一光入射面及與其相連之二光出射面，該光源位 於該光入射面一側，該主屏顯示模組及該副屏顯示模組 分別位於一光出射面一侧，該光入射面存在微結構，該 微結構包括複數上微結構與下微結構，且上微結構與下 微結構錐頂相接而形成雙錐結構。 [0015] 相較於先前技術，本技術方案導光板光入射面之微結構 所形成之雙錐結構使得光線之傳輸區域更廣，可避免兩 光源間之區域光線較弱，各光源附近區域光線較強之現 象，即可消除顯示暗區。同時，雙錐結構可達到充分分 光之目的，可分別滿足主屏、副屏之不同視覺需求，因 而可提高顯示效果。、參 【實施方式】 [0016] 請參閱第二圖，係本發明雙面導光板之第一實施方式示 意圖。該導光板100為平板形，其包括一光入射面110及 與之相鄰之二光出射面120，分別為上出射面121及下出 射面122。於該光入射面110上存在微結構130。該微結 構130係採用三維切割加工技術製作而成，其包括複數上 微結構131與複數下微結構132。該上微結構131與該下 微結構132均為三角錐形，且兩兩以錐頂相接，形成雙錐 094112048 表單編號 A0101 第 6 頁/共 20 頁 0993248035-0 099年07月12日修正番換頁 1330730 結構。 [0017] 該上微結構131於該上出射面121形成之夾角為A1，該下 微結構132於該下出射面122形成之夾角為A2。該上微結 構131於該光入射面110上之高度為T1，於該上出射面 121上之高度為H1，於該上出射面121上之寬度為W1。該 下微結構132於該光入射面110上之高度為T2，於該下出 射面122上之高度為H2，於該下出射面122上之寬度為W2 。相鄰兩上微結構131間之間距為P1，相鄰兩下微結構 132間之間距為P2。 [0018] 針對該導光板100之光入射面110，調整上述各參數即可 得到不同之微結構130。 [0019] 本實施方式中，該上微結構131為均一形狀，該下微結構 132亦為均一形狀，此時，P1关W1，且P2关W2，即相鄰 上微結構131或相鄰下微結構132間為非連續。T1关T2， H1关H2 ,且A1垆A2，即上微結構131與下微結構132為非 對稱。於T1关T2，H1关H2與A1共A2三個條件中只要滿足 一個，亦為非對稱。 [0020] 本實施方式中，該上微結構可為不均一形狀，該下微結 構亦可為不均一形狀，且該上微結構或該下微結構之一 或全部為間斷排佈，則該微結構亦視為非連續。 [0021] 請參閱第三圖，係本發明雙面導光板之第二實施方式示 意圖。與第一實施方式不同之處在於，相鄰上微結構231 或相鄰下微結構232間為對稱、非連續。 [0022] 請參閱第四圖，係本發明雙面導光板之第三實施方式示 094112048 表單編號 A0101 第 7 頁/共 20 頁 0993248035-0 1330730 _ 099年07月12日修正替換頁- 意圖。與第一實施方式不同之處在於，相鄰上微結構331 或相鄰下微結構332間為連續、非對稱。 [0023] 本實施方式中，該上微結構可為不均一形狀，該下微結 構亦可為不均一形狀，且該上微結構或該下微結構全部 為連續排佈，則該微結構亦視為連續。 [0024] 請參閱第五圖，係本發明雙面導光板之第四實施方式示 意圖。與第一實施方式不同之處在於，相鄰上微結構431 或相鄰下微結構432間為連續。上微結構431與下微結構 432為對稱。 · [0025] 本實施方式中，該上微結構可為不均一形狀，該下微結 構亦可為不均一形狀，且該上微結構或該下微結構全部 為連續排佈，則該微結構亦視為連續。 [0026] 請參閱第六圖，係本發明雙面導光板之第五實施方式示 意圖。與第一實施方式不同之處在於，該上微結構531與 該下微結構532均為部分圓錐形，且兩兩以錐頂相接，形 成雙錐結構。 φ [0027] 本實施方式中，相鄰上微結構531或相鄰下微結構532間 為非連續，相對之上微結構與下微結構間為非對稱。 [0028] 本發明雙面導光板之第六實施方式與第二實施方式相似 ，其不同之處在於，該上微結構與該下微結構均為部分 圓錐形。該上微結構與該下微結構為對稱、非連續。 [0029] 本發明雙面導光板之第七實施方式與第三實施方式相似 ，其不同之處在於，該上微結構與該下微結構均為部分 0993248035-0 094112048 表單編號A0101 第8頁/共20頁 1330730 099年07月12日按正替換頁 圓錐形。該上微結構與該下微結構為連續、非對稱。 [0030] 本發明雙面導光板之第八實施方式與第四實施方式相似 ，其不同之處在於，該上微結構與該下微結構均為部分 圓錐形。該上微結構與該下微結構為連續、對稱。 [0031] 本發明雙面導光板還可為如下結構，其中該上微結構與 該下微結構其中之一為三角錐形，另一為部分圓錐形； 或，於該上微結構内部或該下微結構内部，一部分為三 角錐形，另一部分為部分圓錐形。 [0032] 該上微結構或該下微結構可為相鄰連續、上下對稱；相 鄰不連續、上下對稱；相鄰不連續、上下不對稱；相鄰 連續、上下不對稱。所謂相鄰連續指相鄰兩微結構間無 間斷，不論是否均一或同種形狀；所謂上下對稱，僅指 上下相對之兩微結構間形狀大小相同；所謂相鄰不連續 ，指該微結構内部存在至少一處間斷，不論該上微結構 内部或該下微結構内部是否形狀相同、大小一致；所謂 上下不對稱，指該上下相對之兩微結構或者形狀不同， 或者大小不同，或者形狀、大小均不同。 [0033] 上述之三角錐形，亦可為其他多角錐形結構。 [0034] 請參閱第七圖，係本發明面光源裝置600之實施方式示意 圖。該面光源裝置600包括複數光源610及一導光板620 。該導光板620為平板形，其包括一光入射面630及與該 光入射面630相鄰之二光出射面640。該光源610為發光 二極體（Light Emitting Diode，LED)，位於該導光 板620之光入射面630—側。 094112048 表單編號 A0101 第 9 頁/共 20 頁 0993248035-0 1330730 _ 099年07月12日梭正替换頁.[0014] Further, a display device includes a double-sided light guide plate, a plurality of light sources, a main screen display module, and a sub-display module, wherein the double-sided light guide plate includes a light incident surface and two light beams connected thereto An emission surface, the light source is located on a side of the light incident surface, the main screen display module and the sub-screen display module are respectively located on a light exit surface side, the light incident surface has a microstructure, and the microstructure comprises a plurality of upper microstructures And the lower microstructure, and the upper microstructure and the lower microstructure cone are connected to form a double cone structure. [0015] Compared with the prior art, the double-cone structure formed by the microstructure of the light incident surface of the light guide plate makes the transmission area of the light wider, and the light between the two light sources is weak, and the light near the light source is light. A stronger phenomenon can eliminate the dark area. At the same time, the double-cone structure can achieve the purpose of sufficient spectroscopic, and can meet the different visual requirements of the main screen and the sub-screen, respectively, thereby improving the display effect. [Embodiment] [0016] Referring to the second drawing, a first embodiment of a double-sided light guide plate of the present invention is shown. The light guide plate 100 has a flat plate shape and includes a light incident surface 110 and a second light exit surface 120 adjacent thereto, which are an upper exit surface 121 and a lower exit surface 122, respectively. A microstructure 130 is present on the light incident surface 110. The microstructure 130 is fabricated using a three-dimensional cutting technique that includes a plurality of upper microstructures 131 and a plurality of lower microstructures 132. The upper microstructure 131 and the lower microstructure 132 are both triangular in shape, and the two are joined by a cone top to form a double cone 094112048. Form No. A0101 Page 6 of 20 0993248035-0 Correction of July 12, 099 The replacement page 1330730 structure. [0017] The upper microstructure 131 forms an angle A1 on the upper exit surface 121, and the lower microstructure 132 forms an angle A2 on the lower exit surface 122. The height of the upper micro-structure 131 on the light incident surface 110 is T1, the height on the upper exit surface 121 is H1, and the width on the upper exit surface 121 is W1. The height of the lower microstructure 132 on the light incident surface 110 is T2, the height on the lower exit surface 122 is H2, and the width on the lower exit surface 122 is W2. The distance between adjacent two upper microstructures 131 is P1, and the distance between adjacent two lower microstructures 132 is P2. [0018] The different microstructures 130 can be obtained by adjusting the above parameters for the light incident surface 110 of the light guide plate 100. [0019] In the embodiment, the upper microstructure 131 has a uniform shape, and the lower microstructure 132 is also in a uniform shape. At this time, P1 is off W1, and P2 is off W2, that is, adjacent upper microstructure 131 or adjacent The microstructures 132 are discontinuous. T1 turns off T2, H1 turns off H2, and A1垆A2, that is, upper microstructure 131 and lower microstructure 132 are asymmetric. T1 is off T2, and H1 is equal to H2 and A1 is equal to A2. [0020] In this embodiment, the upper microstructure may be a non-uniform shape, and the lower microstructure may also be a non-uniform shape, and one or all of the upper microstructure or the lower microstructure are intermittently arranged. Microstructures are also considered to be discontinuous. [0021] Referring to the third drawing, a second embodiment of a double-sided light guide plate of the present invention is shown. The difference from the first embodiment is that the adjacent upper microstructures 231 or the adjacent lower microstructures 232 are symmetric and discontinuous. [0022] Please refer to the fourth figure, which is a third embodiment of the double-sided light guide plate of the present invention. 094112048 Form No. A0101 Page 7 of 20 0993248035-0 1330730 _ July 12, 2017 Correction Replacement Page - Intent. The difference from the first embodiment is that the adjacent upper microstructures 331 or the adjacent lower microstructures 332 are continuous and asymmetric. [0023] In this embodiment, the upper microstructure may be a non-uniform shape, and the lower microstructure may also be a non-uniform shape, and the upper microstructure or the lower microstructure is all continuous, and the microstructure is also Treated as continuous. [0024] Referring to the fifth drawing, a fourth embodiment of the double-sided light guide plate of the present invention is shown. The difference from the first embodiment is that the adjacent upper microstructures 431 or the adjacent lower microstructures 432 are continuous. The upper microstructure 431 is symmetrical to the lower microstructure 432. [0025] In this embodiment, the upper microstructure may be a non-uniform shape, and the lower microstructure may also be a non-uniform shape, and the upper microstructure or the lower microstructure is all continuous, and the microstructure is Also considered continuous. Referring to a sixth drawing, a fifth embodiment of a double-sided light guide plate of the present invention is shown. The difference from the first embodiment is that the upper microstructure 531 and the lower microstructure 532 are both partially conical, and the two are joined by a cone top to form a double-cone structure. [0027] In the present embodiment, the adjacent upper microstructure 531 or the adjacent lower microstructure 532 is discontinuous, and the upper microstructure and the lower microstructure are asymmetric. [0028] The sixth embodiment of the double-sided light guide plate of the present invention is similar to the second embodiment except that the upper microstructure and the lower microstructure are both partially conical. The upper microstructure and the lower microstructure are symmetrical and discontinuous. [0029] The seventh embodiment of the double-sided light guide plate of the present invention is similar to the third embodiment, except that the upper microstructure and the lower microstructure are both 0993248035-0 094112048 Form No. A0101 Page 8 / A total of 20 pages 1330730 July 12, 2010, according to the positive replacement page conical. The upper microstructure and the lower microstructure are continuous and asymmetric. [0030] The eighth embodiment of the double-sided light guide plate of the present invention is similar to the fourth embodiment except that the upper microstructure and the lower microstructure are both partially conical. The upper microstructure and the lower microstructure are continuous and symmetrical. [0031] The double-sided light guide plate of the present invention may further have a structure in which one of the upper microstructure and the lower microstructure is triangular pyramidal and the other is partially conical; or, inside the upper microstructure or Inside the lower microstructure, one part is triangular pyramidal and the other part is partially conical. [0032] The upper micro structure or the lower micro structure may be adjacent continuous, up and down symmetrical; adjacent discontinuous, upper and lower symmetrical; adjacent discontinuous, upper and lower asymmetrical; adjacent continuous, up and down asymmetrical. The so-called adjacent continuous means that there is no discontinuity between adjacent two microstructures, whether uniform or the same shape; the so-called upper and lower symmetry refers only to the same shape between the two microstructures; the so-called adjacent discontinuity means that the microstructure exists. At least one discontinuity, whether the shape inside the microstructure or the inside of the lower microstructure is the same or the same size; the so-called up and down asymmetry means that the two upper and lower opposite microstructures or shapes are different, or the size is different, or the shape and size are different. [0033] The triangular pyramid described above may also be other polygonal pyramid structures. Referring to FIG. 7, a schematic diagram of an embodiment of a surface light source device 600 of the present invention is shown. The surface light source device 600 includes a plurality of light sources 610 and a light guide plate 620. The light guide plate 620 has a flat plate shape and includes a light incident surface 630 and a two light exit surface 640 adjacent to the light incident surface 630. The light source 610 is a Light Emitting Diode (LED) located on the light incident surface 630 side of the light guide plate 620. 094112048 Form number A0101 Page 9 of 20 0993248035-0 1330730 _ July 12, 2008, the shuttle is replacing the page.
[0035] 該光入射面630上存在微結構650。該微結構650包括複 . 數上微結構651及複數下微結構652，均可為角錐形或部 分圓錐形，且兩兩以錐頂相接，形成雙錐結構。 [0036] 該上微結構651及該下微結構652可為相鄰連續、上下對 稱結構，相鄰不連續、上下對稱結構，還可為相鄰不連 續、上下不對稱結構，亦可為相鄰連續、上下不對稱結 構。該微結構630係採用三維切割加工技術製作而成。 [0037] 請參閱第八圖，係本發明顯示裝置700之實施方式示意圖 。該顯示裝置700包括一導光板710、複數光源720、一 · 主屏顯示模組730及一副屏顯示模組740。該導光板710 包括一光入射面711及與其相連之二光出射面712,分別 為上出射面7121及下出射面7122。該光源72 0位於該光 入射面711 —側。 [0038] 該主屏顯示模組730及該副屏顯示模組740分別位於一光 出射面712—側，在本實施方式中，該主屏顯示模組730 位於該上出射面7121—側，該副屏顯示模組740位於該下[0035] A microstructure 650 is present on the light incident surface 630. The microstructure 650 includes a plurality of microstructures 651 and a plurality of lower microstructures 652, each of which may be pyramidal or partially conical, and the two are joined by a conical top to form a biconical structure. [0036] The upper microstructure 651 and the lower microstructure 652 may be adjacent continuous, upper and lower symmetrical structures, adjacent discontinuous, upper and lower symmetrical structures, and may be adjacent discontinuous, upper and lower asymmetric structures, or may be phases. Adjacent continuous, upper and lower asymmetric structure. The microstructure 630 is fabricated using a three-dimensional cutting process. [0037] Referring to FIG. 8, a schematic diagram of an embodiment of a display device 700 of the present invention is shown. The display device 700 includes a light guide plate 710, a plurality of light sources 720, a main screen display module 730, and a sub-display module 740. The light guide plate 710 includes a light incident surface 711 and a two light exit surface 712 connected thereto, which are an upper exit surface 7121 and a lower exit surface 7122, respectively. The light source 72 0 is located on the side of the light incident surface 711. [0038] The main screen display module 730 and the sub-screen display module 740 are respectively located on the side of a light exit surface 712. In the embodiment, the main screen display module 730 is located on the side of the upper exit surface 7121. The screen display module 740 is located under the
出射面7122—側。該光入射面711存在微結構750。 [0039] 該微結構750包括複數上微結構751及複數下微結構752 ，均可為角錐形或部分圓錐形，且兩兩以錐頂相接，形 成雙錐結構。 [0040] 該上微結構751及下微結構752可為相鄰連續、上下對稱 結構，相鄰不連續、上下對稱結構，還可為相鄰不連續 、上下不對稱結構，亦可為相鄰連續、上下不對稱結構 0993248035-0 094112048 表單編號A0101 第10頁/共20頁 1330730 099年07月12日核正替换頁 [0041] 該微結構750係採用三維切割加工技術製作而成。 [0042] 針對副屏顯示模組740與光入射面711之距離可選擇如上 所述之不同種類之導光板710。 [0043] 該導光板光入射面之微結構所形成之雙錐結構使得光線 之傳輸區域更廣，可避免兩光源間之區域光線較弱，各 光源附近區域光線較強之現象，即可消除顯示暗區。同 時，雙錐結構可達到充分分光之目的，可分別滿足主屏 、副屏之不同視覺需求，因而可提高顯示效果。 籲[0044] 综上所述，本發明確已符合發明專利之要件，爰依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，本發明之範圍並不以上述實施方式為限，舉凡熟習 本案技藝之人士援依本發明之精神所作之等效修飾或變 化，皆應涵蓋於以下申請專利範圍内。 [0045] 【圖式簡單說明】 第一圖係先前技術之雙屏手機光線傳輸原理平面示意圖 • [0046] 〇 第二圖係本發明雙面導光板之第一實施方式示意圖。 [0047] 第三圖係本發明雙面導光板之第二實施方式示意圖。 [0048] 第四圖係本發明雙面導光板之第三實施方式示意圖。 [0049] 第五圖係本發明雙面導光板之第四實施方式示意圖。 [0050] 第六圖係本發明雙面導光板之第五實施方式示意圖。 [0051] 第七圖係本發明面光源裝置之實施方式示意圖。 094112048 表單編號A0101 第11頁/共20頁 0993248035-0 1330730 099年07月12日修正替換頁 [0052] 第八圖係本發明顯示裝置之實施方式示意圖。 【主要元件符號說明】 [0053] 導光板：100、620、710 [0054] 光入射面：110、510、630、711 [0055] 光出射面：120、640、712 [0056] 上出射面：121、521、7121 [0057] 下出射面：122、522、7122 [0058] 微結構：130 ' 650 ' 750 [0059] 面光源裝置：600 [0060] 光源：610、720 [0061] 顯示裝置：700 [0062] 主屏顯示模組：730 [0063] 副屏顯示模組：740 [0064] 上微結構：131、231、331、431 '531 ' 651 、751 [0065] 下微結構：132、232、332、432、532 、652 、752Exit surface 7122 - side. The light incident surface 711 has a microstructure 750. [0039] The microstructure 750 includes a plurality of upper microstructures 751 and a plurality of lower microstructures 752, each of which may be pyramidal or partially conical, and the two are joined by a conical top to form a double-cone structure. [0040] The upper microstructure 751 and the lower microstructure 752 may be adjacent continuous, upper and lower symmetrical structures, adjacent discontinuous, upper and lower symmetrical structures, and may be adjacent discontinuous, upper and lower asymmetric structures, or adjacent Continuous, up and down asymmetric structure 0993248035-0 094112048 Form number A0101 Page 10 / Total 20 pages 1330730 099 July 12 nuclear replacement page [0041] The microstructure 750 series is made by three-dimensional cutting processing technology. [0042] For the distance between the sub-screen display module 740 and the light incident surface 711, different types of light guide plates 710 as described above may be selected. [0043] The double-cone structure formed by the microstructure of the light incident surface of the light guide plate makes the transmission area of the light wider, can avoid the weak light in the region between the two light sources, and the light in the vicinity of each light source is strong, and can be eliminated. Show dark areas. At the same time, the double-cone structure can achieve the purpose of sufficient spectroscopic, and can meet the different visual requirements of the main screen and the sub-screen, respectively, thereby improving the display effect. [0044] In summary, the present invention has indeed met the requirements of the invention patent and has filed a patent application in accordance with the law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0045] The first figure is a schematic diagram of the principle of light transmission of a dual-screen mobile phone of the prior art. [0046] The second figure is a schematic view of a first embodiment of the double-sided light guide plate of the present invention. [0047] The third figure is a schematic view of a second embodiment of the double-sided light guide plate of the present invention. [0048] The fourth figure is a schematic view of a third embodiment of the double-sided light guide plate of the present invention. [0049] The fifth drawing is a schematic view of a fourth embodiment of the double-sided light guide plate of the present invention. [0050] FIG. 6 is a schematic view showing a fifth embodiment of the double-sided light guide plate of the present invention. [0051] FIG. 7 is a schematic view showing an embodiment of a surface light source device of the present invention. 094112048 Form No. A0101 Page 11 of 20 0993248035-0 1330730 Revised replacement page of July 12, 2008 [0052] The eighth figure is a schematic diagram of an embodiment of the display device of the present invention. [Main component symbol description] [0053] Light guide plate: 100, 620, 710 [0054] Light incident surface: 110, 510, 630, 711 [0055] Light exit surface: 120, 640, 712 [0056] Upper exit surface: 121, 521, 7121 [0057] Lower exit surface: 122, 522, 7122 [0058] Microstructure: 130 '650 '750 [0059] Surface light source device: 600 [0060] Light source: 610, 720 [0061] Display device: 700 [0062] Main screen display module: 730 [0063] Sub screen display module: 740 [0064] Upper micro structure: 131, 231, 331, 431 '531 '651, 751 [0065] Lower micro structure: 132, 232 , 332, 432, 532, 652, 752
094112048 表單編號A0101 第12頁/共20頁 0993248035-0094112048 Form No. A0101 Page 12 of 20 0993248035-0