530143 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（1 ) [技術領域] 本發明係有關於一種背光裝置，其係使用於液晶顯示 裝置、廣告等看板以及照明器具等者。 [習知背景] 筆記型攜帶用個人電腦及液晶電視等之液晶顯示裝置 之背光裝置多半使用被稱為緣光（edge light)方式者。該方 式之背光裝置係具有導光板、光源、反射板、擴散板及稜 鏡層等，且導光板之一端面為與光源相對向之射入光端 面，而導光板之下面則為反射面，導光板之上面為射出光 面。又，導光板之射入光端面以外之端面上黏貼有反射帶，, 另一方面，在導光板之反射面上設有不規則反射部，且於 反射面上堆積有反射板。進而，導光板之射出光面上依序 叠設有擴散板及稜鏡層。 然後，藉背光裝置所施行之照明，使來自光源之照射 光由導光板之射入光端面朝其内部射入。該入射光係於導 光板之反射面及反射板與導光板之射出光面重複反射，同 時朝與射入光端面側（在該說明書中「射入光端面側」與「光 源側」同義）相反之側前進，並有一部分光在反射面之不規 則反射部進行不規則反射。接著，在導光部内部往射出光 面射入之光中，其入射角比臨界角小之光可由導光板之射 出光面朝外射出，且藉擴散板加以擴散。該擴散光接受經 由稜鏡層之控制後照射液晶顯示元件。 惟，按習知裝置並沒有設置任何可因應與光源間之距 離的不同，來調整朝導光板之射出光面之各部位射入之光 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） .丨—丨—AW— (請先閱讀背面之注意事項再填寫本頁) « — — — — — — I —530143 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (1) [Technical Field] The present invention relates to a backlight device, which is used for liquid crystal display devices, billboards such as advertisements, and lighting appliances. [Knowledge background] A backlight device for a liquid crystal display device such as a portable personal computer and a liquid crystal television is mostly called an edge light system. The backlight device of this method has a light guide plate, a light source, a reflection plate, a diffuser plate, a sacral layer, etc., and one end face of the light guide plate is an incident light end face opposite to the light source, and a lower face of the light guide plate is a reflective surface. The upper surface of the light guide plate is a light emitting surface. In addition, a reflection band is attached to an end surface other than the light-entering end surface of the light guide plate. On the other hand, an irregular reflection portion is provided on the reflection surface of the light guide plate, and a reflection plate is stacked on the reflection surface. Furthermore, a light-emitting surface of the light guide plate is sequentially provided with a diffuser plate and a plywood layer. Then, by the illumination performed by the backlight device, the irradiated light from the light source is made to enter from the end face of the light guide plate to the inside thereof. The incident light is repeatedly reflected on the reflecting surface of the light guide plate and the light emitting surface of the reflecting plate and the light guide plate, and at the same time, it is toward the end face of the incident light (in this description, "the end face of the incident light" is synonymous with "the light source side") The opposite side goes forward, and a part of the light is irregularly reflected at the irregular reflection portion of the reflecting surface. Next, in the light incident into the light exit surface inside the light guide, light having an incident angle smaller than the critical angle can be emitted outward by the light exit surface of the light guide plate and diffused by the diffusion plate. The diffused light is irradiated to the liquid crystal display element after being controlled by the hafnium layer. However, according to the conventional device, there is no set to adjust the light incident on each part of the light-emitting surface of the light guide plate according to the difference between the distance from the light source. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). 丨 — 丨 —AW— (Please read the notes on the back before filling this page) «— — — — — — I —
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A7 _ B7___ 五、發明說明（2 ) 的量（尤其是以臨界角以下之角度射入之光的量）之裝置。 因此，在習知裝置中，導光板之射出光面上之「靠近 光源」之射入光端面側之端部，與射出光面之中央部相比， 光的入射量較多，藉此，以臨界角以下入射之光量也變多。 結果造成在上述端部上將產生所謂亮線（明亮帶狀線）之異 常發光，且在上述端部與射出光面之中央部間產生出很大 的亮度差。 又，習知裝置中，導光板之射出光面中除了射入光端 面側以外之各端部，也因受到反射帶所帶來之光反射的影 響，當這些端部沒有可調整入射光之光量的裝置時，也會. 發生上述同樣的問題。 [發明之揭示] 本發明之目的在於提供一種背光裝置，其係解決上述 問題’可防止導光板中射出光面之各端部所發生之異常發 光’且使於導光板之射出光面之端部與中央部間不會產生 很大的亮度差者。 為達成上述目的，本發明之特徵在於：係具有一導光 板及一反射板，令該導光板之一端面為射入光端面，該導 光板的下面為反射面，該導光板的上面為射出光面，且於 月，J述反射面上設置不規則反射部，並使前述反射板與該反 射面相對向者；而於前述反射面中靠射入光端面側之端部 設置不規則反射禁止部，且於前述反射板中與不規則反射 不止部相對向之領域内設置一光吸收部，並於底視時，使 前述反射板之端緣至少一部分與前述導光板中對應之端緣 Μ--------^---------線 (請先Μ讀背面之注意事項再填寫本頁) Μ濟部智慧財•產局員•工消費合作社印製 530143 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（ 及20C外側，諸如lmm以上者。反射板5例如是於聚乙 烯對苯二曱酸酯（PET)等之白膜上面蒸鍍有鋁、銀（八^ 等形成，且反射板5的上面是呈鏡面者。又，將反射板5 只用上述白膜構成，作成擴散反射板。 擴散板6，係用以將由導光板i之射出光面12射出之 光擴散者，作成與射出光面12略同大小，與射出光面相接 觸，或接近之狀態下相對向者。擴散板6可由諸如聚碳酸 酯膜等之透明樹脂膜所構成者。 第1及第2稜鏡層7、8，係可控制藉擴散板6所擴散 之光之前進方向，由以上稜鏡層7、8之略正上方（背光裝 置之略正面方向）射出。各稜鏡層7、8係呈與導光板i或 擴散板6略同大小，在擴散板6上依上列順序重疊。擴散 板6、第1棱鏡層7及第2稜鏡層8係各相接觸，或接近 之狀態下相對向者。各稜鏡層7、8係例如由聚碳酸酯膜等 之透明樹脂膜所構成者。各稜鏡層7、8上面（表面）或下面 (裏面）上’與光源2平行（朝導光板1之射入光端面1〇侧 相反方向）並設多數為截面二等邊三角形之突條之稜鏡部 (省略圖示）。 依上述實施例，藉背光之照明，來自光源2之照射光 及反射蓋3之反射光由導光板1射入光端面朝内部射 入。該入射光係於導光板1反射面U及反射板5、導光板 1之射出光面12上重複反射，朝著與射入光端面側相反側 前進。隨著該前進，同時該光之一部分在不規則反射部i 5 行不規則反射，或藉導光板1射入光端面1〇以外之端面及 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） — — — — — — — — — — — ^ — — — — — — I— ^ « — — — — — —I — ^ I (請先閱讀背面之注音？事項再填寫本頁) -10- 530143 A7A7 _ B7___ V. Device for explaining the quantity of (2) (especially the quantity of light incident at an angle below the critical angle). Therefore, in the conventional device, the end portion of the incident light end face side "close to the light source" on the light emitting surface of the light guide plate has a larger incident amount of light than the central portion of the light emitting surface. The amount of light incident below the critical angle also increases. As a result, an abnormal light emission called a bright line (bright strip line) is generated at the end portion, and a large luminance difference is generated between the end portion and the central portion of the light emitting surface. Moreover, in the conventional device, the ends of the light-emitting surface of the light guide plate other than the end face of the incident light are also affected by the light reflection caused by the reflection band. When these ends have no adjustable incident light, The same problem occurs when the light quantity device is used. [Disclosure of the invention] The object of the present invention is to provide a backlight device that solves the above-mentioned problem, 'can prevent abnormal light emission from occurring at each end portion of the light-emitting plate in the light guide plate', and enables the end of the light-emitting plate There is no large difference in brightness between the central part and the central part. In order to achieve the above object, the present invention is characterized in that it has a light guide plate and a reflection plate, so that one end surface of the light guide plate is an incident light end surface, the lower surface of the light guide plate is a reflective surface, and the upper surface of the light guide plate is output It has a smooth surface, and an irregular reflection part is provided on the reflecting surface of the J-plane, and the reflecting plate is opposite to the reflecting surface; and an irregular reflection is provided on the end of the reflecting surface near the end face of the incident light. And a light absorbing portion is provided in an area of the reflecting plate opposite to the irregular reflection non-stop portion, and when viewed from the bottom, at least a part of the edge of the reflecting plate is corresponding to the corresponding edge of the light guide plate Μ -------- ^ --------- line (please read the precautions on the back before filling in this page) Μ printed by Ministry of Economic Affairs, Intellectual Property, Industry Bureau, Industry and Consumer Cooperatives 530143 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. The description of the invention (and the outside of 20C, such as 1mm or more. The reflector 5 is, for example, vapor-deposited on a white film such as polyethylene terephthalate (PET). Formed of aluminum, silver, etc., and the upper surface of the reflecting plate 5 is Mirror surface. Also, the reflecting plate 5 is composed of only the white film described above to form a diffuse reflection plate. The diffuser plate 6 is used to diffuse the light emitted from the light emitting surface 12 of the light guide plate i. The same size, in contact with the light-emitting surface, or in the state of being close to each other. The diffuser plate 6 may be made of a transparent resin film such as a polycarbonate film. The first and second layers 7, 8 are acceptable. The forward direction of the light diffused by the diffuser plate 6 is controlled to be emitted from just above the upper layers 7 and 8 (the front direction of the backlight device). Each of the layers 7 and 8 is diffused with the light guide plate i or diffused. The plates 6 are approximately the same size and overlap in the above order on the diffuser plate 6. The diffuser plate 6, the first prism layer 7 and the second cymbal layer 8 are in contact with each other, or face each other in a close state. The layers 7 and 8 are made of, for example, a transparent resin film such as a polycarbonate film. The top (surface) or bottom (inside) of each of the layers 7 and 8 is parallel to the light source 2 (enters the light guide plate 1) Opposite side of the light end surface 10) and set the ridge portion of most of the ridges of the second equilateral triangle in cross section (province According to the above embodiment, by the backlight illumination, the light from the light source 2 and the reflected light from the reflection cover 3 are incident on the light end face of the light guide plate 1 and enter the interior. The incident light is reflected on the light guide plate 1 The surface U, the reflection plate 5, and the light-emitting surface 12 of the light guide plate 1 repeatedly reflect and advance toward the side opposite to the end face side of the incident light. As this progresses, at the same time, a part of the light is at the irregular reflection portion i 5. Regular reflection, or the end face other than the light end face 10 through the light guide plate 1 and the paper size are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) — — — — — — — — — — — ^ — — — — — — I— ^ «— — — — — — I — ^ I (Please read the note on the back? Please fill in this page for matters) -10- 530143 A7
訂 請 先 閱 讀 背 δ 之 注 意 事 項 再 填 本 頁 '—^ 4 經濟部智慧財產局員工消費合作社印製 530143 A7 B7 五、發明說明（11 ) 大者。 依上述實施例，於底視時，反射板5中將射入光端面 側端緣21A及與射入光端面側相反側之端緣21C，與導光 板1對應之端緣20A、20C —致，因此依背光之照明時， 可使由導光板1反射面11中射入光端面之端部及與射入光 端面側相反側之端部所漏出之光内，有「適當比例」的光 量藉反射板5朝外逸出而不朝導光板1側反射。又，於底 視時，反射板5中與射入光端面側端緣21A相鄰接之各端 緣21B位於導光板1對應之各端緣20B内側有一適當距 離，因此在背光照明時，由反射面11中與射入光端面側之 端部相鄰接之端部漏出之光内比上述「適當比例」多之比 例的光量藉反射板5朝外逸出，而不會朝導光板1側反射。 藉此，可使導光板1反射面11及反射板5各端部，尤其是 與輸入光端面側端部相鄰接之各端部之光的反射量變少。 結果也可使導光板1射出光面12之各端部，尤其是使與射 入光端面側之端部相鄰接之射出光量比習知少。 藉此’可防止導光板1射出光面12之端部，尤其是與 射入光端面端部相鄰接之各端部發生被稱為亮線之異常發 光。藉此’可防止導光板1射出光面12之端面，尤其是與 射入光端面側端部相鄰接之各端部與中央部間產生很大的 亮度差。 第11及12圖係顯示本發明之第4實施例，依該例係 可防止導光板1射出光面12之各端部，尤其是與射入光端 面側相反側之端部之異常發光。具體而言，於底視時， 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） •I!—ΛΨ (請先閱讀背面之注意事項再填寫本頁) 訂--------- -14· 530143Please read the notes on δ before filling in this page '— ^ 4 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 530143 A7 B7 V. Description of the invention (11) The larger one. According to the above embodiment, in the bottom view, the reflecting plate 5 will have the end edge 21A of the incident light end side and the end edge 21C of the side opposite to the incident light end side, and the end edges 20A, 20C corresponding to the light guide plate 1- Therefore, when the light is illuminated by the backlight, there can be an "appropriate proportion" of the amount of light leaked from the light leaking from the end of the light end face of the light guide plate 1 and the end opposite to the light end face side. The reflection plate 5 escapes outward without reflecting to the light guide plate 1 side. In the bottom view, the end edges 21B of the reflecting plate 5 adjacent to the end edge 21A of the incident light end face are located at an appropriate distance inside the end edges 20B corresponding to the light guide plate 1. The proportion of the amount of light leaking out of the end of the reflecting surface 11 adjacent to the end portion on the end face side of the incident light is larger than the above-mentioned "appropriate proportion". Side reflection. Thereby, the reflection amount of light at each end portion of the reflection surface 11 and the reflection plate 5 of the light guide plate 1, especially at each end portion adjacent to the end portion on the end face side of the input light can be reduced. As a result, the end portions of the light-emitting surface 12 of the light guide plate 1 can be made smaller, in particular, the amount of light emitted adjacent to the end portion on the light-entering end face side is smaller than conventional. By this, it is possible to prevent an abnormal light emission called a bright line from occurring at the end portion of the light-emitting surface 12 of the light guide plate 1, particularly at the end portions adjacent to the end portion of the incident light end surface. Thereby, it is possible to prevent a large brightness difference between the end surface of the light-emitting surface 12 of the light guide plate 1 and particularly the end portion and the central portion adjacent to the end portion on the side of the light-entry end surface. Figures 11 and 12 show a fourth embodiment of the present invention, and according to this example, abnormal light emission at each end portion of the light guide plate 1 from the light surface 12 is prevented, especially at the end portion on the side opposite to the light input end surface side. Specifically, when viewed from the bottom, this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) ------ -14 · 530143
經濟部智慧財'產局員~工消費合作社印製 A7 B7 五、發明說明（12 ) 反射板5中射入光端面側之端緣21A及與此相鄰接之端緣 21B，與導光板1中對應之端緣20A、20B —致。又，於底 視時，使反射板5中與射入光端面側相反側之端緣21C位 於導光板1對應之各端緣20C内側有一適當距離。上述距 離通常最大為1mm，也可為更大者。 依上述實施例，於底視時，反射板5中將射入光端面 側端緣21A及與此相鄰接之端緣21B，與導光板1中對應 之端緣20 A、20B —致，因此依背光之照明時，可使由導 光板1反射面11中射入光端面之端部及與此相鄰接之各端 部所漏出之光内，有「適當比例」的光量藉反射板5朝外. 逸出而不朝導光板1側反射。又，於底視時，反射板5中 與射入光端面側相反側之端緣21C位於導光板1中對應之 端緣20C内側有一適當距離，因此由反射面u中與射入 光端面側相反側之端部漏出之光内比上述「適當比例」多 之比例的光量藉反射板5朝外逸出，而不會朝導光板i側 反射。藉此，可使導光板1反射面11及反射板5各端部， 尤其是與輸入光端面側相反側之端部之光的反射量 變少。結果也可使導光板1射出光面12之各端部，尤其是 使與射入光端面側相反側之端部之射出光量比習知少。 藉此，可防止導光板1射出光面12之端部，尤其是與 射入光端面側相反側之端部發生被稱為亮線之異常發光。 措此’可防止導光板1射出光面12之端面，尤其是與射入 光端面側相反側之端部與中央部間產生很大的亮度差。 此外，本發明中除第2實施例外之各實施例之構造， 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） ^--------^------I--^ (請先閱讀背面之注意事項再填寫本頁) •15· 530143Printed by A7 B7, member of the Bureau of Industry and Intellectual Property of the Ministry of Economic Affairs ~ Industrial and Consumer Cooperatives V. Description of the invention (12) The end edge 21A of the reflecting plate 5 that is incident on the light end face side and the end edge 21B adjacent to it, and the light guide plate 1 The corresponding end edges 20A and 20B are the same. When viewed from the bottom, the edge 21C of the reflecting plate 5 on the opposite side to the incident light end face side is positioned at an appropriate distance from the inside of each of the end edges 20C corresponding to the light guide plate 1. The distance is usually a maximum of 1 mm, but it may be larger. According to the above embodiment, in the bottom view, the reflecting plate 5 will be incident on the light end surface side edge 21A and the adjacent edge 21B adjacent to it, and the corresponding edge 20 A, 20B in the light guide plate 1, Therefore, when the light is illuminated by the backlight, there can be an "appropriate proportion" of the amount of light in the light leaked from the end of the light-reflecting surface 11 of the light guide plate 1 that enters the light end surface and the ends adjacent to it. 5 outwards. Escape without reflecting toward the light guide 1 side. In the bottom view, the end edge 21C of the reflecting plate 5 on the side opposite to the incident light end face side is located at an appropriate distance inside the corresponding end edge 20C of the light guide plate 1. Therefore, the reflecting surface u and the incident light end face side An amount of light in the light leaked from the opposite end portion is larger than the above-mentioned "appropriate ratio", and the light escapes outward through the reflecting plate 5 without being reflected toward the light guide plate i side. This makes it possible to reduce the reflection amount of light at each end portion of the reflection surface 11 and the reflection plate 5 of the light guide plate 1, particularly at the end portion opposite to the end face side of the input light. As a result, it is possible to reduce the amount of light emitted from each end portion of the light-emitting surface 12 of the light guide plate 1, especially the end portion on the side opposite to the light-entering end face side, as compared with the conventional one. Thereby, abnormal light emission called a bright line can be prevented from occurring at the end portion of the light-emitting surface 12 of the light guide plate 1, particularly at the end portion on the side opposite to the light-entering end surface side. By doing so, it is possible to prevent a large difference in brightness between the end face of the light guide plate 1 from the light emitting surface 12, particularly the end portion and the center portion on the opposite side from the light incident end face side. In addition, the structure of the embodiments of the present invention except for the second embodiment, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public love) ^ -------- ^ ---- --I-^ (Please read the notes on the back before filling out this page) • 15 · 530143
五、發明說明（13 ) (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 可因應需要而適當組合之。又，上述實施例中，在反射面 之各端部設置不規則反射禁止部，並於反射板之各端部設 置光吸收部，但也可因應需要，而在任一處，或多數端部 省略不規則反射禁止部或光吸收部。進而，上述實施例中， 於底視時，反射板中位於輸入光端面側各隅部之端緣位於 導光板對應之端緣内側，但依本發明，也可因應需要，可 於底視時，使反射板端緣的至少一部分與導光板對應之端 緣一致，或位於導光板對應之端緣内側者。此時具有兩種 形態，即，於底視時，將反射板中射入光端面側之端緣之 至少一部分與導光板中對應之端緣一致，或，令位於導光. 板中對應之端緣内側者為必要構成要件之形態及不必要之 形態。又，在上述實施例中，使於導光板中除射入光端面 外三端面上設置反射材，但依本發明也可不設反射材。此 外，背光裝置設置於液晶顯示裝置等框架内，如上述，在 導光板上不設反射材時，也可將由導光板三端面漏出之光 在框架反射而返回導光板，在如此情況時，依本發明，也 可與於導光板端面設置反射材之形態同樣，防止異常發 光。又，在本發明也可適用於非為楔形之導光板，即板厚 為一定之導光板者。 [圖式之簡單說明] 第1圖至第5圖係顯示本發明之第1實施例； 第1圖為截面圖； 第2圖為底視圖； 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -16- 530143V. Description of the invention (13) (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs It can be combined appropriately according to needs. Moreover, in the above-mentioned embodiment, irregular reflection prohibition sections are provided at each end portion of the reflecting surface, and light absorption portions are provided at each end portion of the reflecting plate, but it may be omitted at any place or at most end portions according to needs. Irregular reflection prohibition part or light absorption part. Furthermore, in the above embodiment, in the bottom view, the end edges of the crotches on the input light end face side in the reflection plate are located inside the corresponding end edges of the light guide plate, but according to the present invention, it can also be used in the bottom view. , So that at least a part of the end edge of the reflecting plate is consistent with the corresponding end edge of the light guide plate, or is located inside the corresponding end edge of the light guide plate. At this time, there are two forms, that is, in the bottom view, at least a part of the edge of the reflecting plate that is incident on the light end face side is consistent with the corresponding edge of the light guide plate, or it is located in the light guide plate. The inside of the edge is the form that is necessary to constitute the element and the form that is unnecessary. Further, in the above-mentioned embodiment, the reflective material is provided on three end surfaces except the incident light end surface in the light guide plate, but the reflective material may not be provided in the present invention. In addition, the backlight device is installed in a frame such as a liquid crystal display device. As described above, when no light reflecting plate is provided on the light guide plate, the light leaked from the three end faces of the light guide plate can be reflected on the frame and returned to the light guide plate. The present invention can also prevent abnormal light emission in the same manner as that in which a reflecting material is provided on the end surface of the light guide plate. In addition, the present invention is also applicable to non-wedge-shaped light guide plates, that is, light guide plates having a constant thickness. [Brief description of the drawings] Figures 1 to 5 show the first embodiment of the present invention; Figure 1 is a cross-sectional view; Figure 2 is a bottom view; This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -16- 530143
發明說明（14 第3圓為導光板之底視圖； 第4圖為反射板之平面圖； 第5圖為主要部位之立體圖； 第6圓至第8圖係顯示本發明之第2實施例； 第6圖為裁面圖； 第7圖為底視圖； 第8圖為主要部位之立體圖； 第9圖及第10圖係顯示本發明之第3實施例； 第9圖為截面圖； 第1 〇圖為底視圖； 第11圖及第12圖係顯示本發明之第4實施例；Explanation of the invention (14 The third circle is the bottom view of the light guide plate; the fourth figure is a plan view of the reflecting plate; the fifth figure is a perspective view of the main part; the sixth to eighth figures show the second embodiment of the present invention; Fig. 6 is a cutaway view; Fig. 7 is a bottom view; Fig. 8 is a perspective view of the main parts; Figs. 9 and 10 show a third embodiment of the present invention; Fig. 9 is a cross-sectional view; The figure is a bottom view; Figures 11 and 12 show a fourth embodiment of the present invention;
*經濟部智慧財"產局員X消費合作社印製 第11圖為截面圖； 第12圖為底視圖。 圖中標號說明 1…導光板 10…射入光端面 11…反射面 12···射出光面 14…不規則反射禁止部 15…不規則反射部 16···光吸收部 17···切口部 19,20A，20B，20C，21A，21B ，21C…端緣 2.. .光源 3.. .反射蓋 4.. .反射材 5.. .反射板 6.. .擴散板 7,8···第1，第2稜鏡層 本紙張尺度適用中國國家標準（CNS)A4規格（210x297公釐） ^--------^---------^ (請先閱讀背面之注意事項再填寫本頁) -17-* Printed by the Ministry of Economic Affairs's Smart Assets & Production Bureau Member X Consumer Cooperatives Figure 11 is a sectional view; Figure 12 is a bottom view. Explanation of reference numerals in the figure 1 ... light guide plate 10 ... incoming light end surface 11 ... reflection surface 12 ... exit light surface 14 ... irregular reflection prohibition portion 15 ... irregular reflection portion 16 ... light absorption portion 17 ... cutout Parts 19, 20A, 20B, 20C, 21A, 21B, 21C… End edge 2 ... Light source 3 .. Reflective cover 4 .. Reflective material 5 .. Reflective plate 6 ... Diffuser plate 7, 8 · ·· The 1st and 2nd layers of this paper are in accordance with China National Standard (CNS) A4 (210x297 mm) ^ -------- ^ --------- ^ (please first Read the notes on the back and fill out this page) -17-