M434945 五、新型說明： 【新型所屬之技術領域】 本創作係有種屏隔板，_是有關於—種具有正反面輝度 (luminance)差的光學屏隔板。 【先前技術】 • 習知技術巾，光學屏隔板細於辦公室Η窗或卫作桌輕間屏隔或裝 •飾用途。-種現有技術利用一為導光板上具有侧的微結構作為該光學屏 隔板，該微結構的形狀為半_。然械微結構折射出的光線會偏折為大 角度的光，而超出導光板的周邊之外，使得導光板仍為透明，導致觀看者 會從導光板的正面看穿到背面，而無法使導光板產生非透明的效果。 另-現有技術為_白色油墨在基板上，#沒有絲照射基板時該油 墨呈現白色，觀看者從基板的_平面看着㈣非透日級果。但是由該 Ρ刷由墨折射出的光線無法受到控制，亦即無法控制基板正面與背面兩側 籲的光強度而無法達到一側透明，另一邊為非透明的效果，以致於空間屏 隔的目的又到限制。因此目前需要設計新式的屏隔板，以解決上述之問題。 【新型内容】 ，本創作之目的在於提供—種具有正反轉度差_光轉隔板，當 時藉由控制光學屏隔板的正反面之輝度，以使光學屏隔板的一 1 半透j 3側為不透明，達到該光學屏隔板具有較佳的遮蔽效果。 成Μ目的’本創作實施射提供—種具有正反面輝度差的光學 屏隔板，其包括光源以及基板。光顧喊生—照射光線 。基板具有平面 區域、位於該平面區域的相對異側之表面區域、以及位於該平面區域與該 M434945 表面區域之間的一側邊，當該光源開啟使該照射光線從該側邊進入該基板 的内部並且分別穿透該平面區域以及該表面區域至該基板的外部時，該表 面區域折射一部分的照射光線穿出到達該平面區域的外部，並且該表面區 域折射另一部分的照射光線穿出到達該表面區域的外部，藉由穿過該平面 區域的部分照射光線之平面輝度大於穿過該表面區域的另一部分照射光線 之表面輝度，以從該平面區域的外部觀看該基板係處於不透明狀態，並且 從該表面區域的外部觀看該基板係處於半透明狀態。 根據上述說明’本創作之具有正反面輝度差的光學屏隔板，當光源開 啟時，藉由控制光學屏隔板的正反面之輝度，以使光學屏隔板的一側為半 透明，另一側為不透明，以使光學屏隔板具有較佳的遮蔽效果。 【實施方式】 參考第1A圖以及第1B圖，第1A圖係繪示本創作第一實施例中具有 正反面輝度(luminance)差的光學屏隔板1〇〇處於非透明狀態之侧視圖，第 1B圖係繪示本創作第一實施例中具有正反面輝度差的光學屏隔板1〇〇處於 透明狀態之側視圖。該光學屏隔板1〇〇包括光源1〇2以及基板1〇4。光源 1〇2設置於基板104的側邊1〇5，亦可設置於基板1〇4的另一側邊1〇5。該 光源102用以產生一照射光線1〇6。該光源1〇2例如是發光二極體 ermtted d1〇de’ LED)、燈管或是任意型式的燈光來源。在一實施例中，鵁基 板104的材質係選自於聚曱基丙稀酸曱醋聚碳酸醋的)以及玻璃 所組成的族群，亦即基板1〇4的材質例如是透明材質。 在第1A圖以及第1B圖中，該基板1〇4具有一平面區域、位於該 平面區域108的相對異側之一表面區域11〇、以及位於該平面區域⑽與該 M434945 表面區域110之間的側邊105，該表面區域110設有複數結構區域H2a，每 一結構區域112a具有複數錐狀微結構114。該些結構區域i12a例如是複數 凹型區域’凹型區域例如是以不規則形狀或是規則形狀分布於表面區域 110。 如第1A圖所示，當該光源102開啟使該照射光線106從該側邊105進 入該基板104的内部並且分別穿透該平面區域⑽以及該表面區域no至 該基板104的外部’以藉由該些結構區域n2a的錐狀微結構114折射一部 分的照射光線106穿出到達該平面區域log的外部，並且該些結構區域U2a 的錐狀微結構114折射另一部分的照射光線1Q6穿出到達該表面區域u〇 的外部’使穿過該平面區域108的部分照射光線1〇6之平面輝度大於穿過 該表面區域110的另一部分照射光線106之表面輝度，以從該平面區域1〇8 的外部觀看該基板104時該基板104係處於不透明(〇paqUe)狀態，並且從該 表面區域110的外部觀看該基板104時該基板104係處於半透明(translucent) 狀態。在一實施例中，該平面輝度與該表面輝度的輝度比例介於60% : 40〇/。 至95% : 5%之間。另-實關巾’該平轉度與·面輝度的輝度比例係 為78% : 22%。又-實施例中，該平面輝度與該表面輝度的輝度比例係為 86% : 14°/。。應注意的是，在該平面輝度大於該表面輝度的情況下，該平面 輝度與該表面輝度之間的比例可作任意的調整。 具體來說’如第1A圖所示，為達到上述正反面(亦即平面區域1〇8以 及表域_之間的輝度差之特徵，本發明之光學屏隔板利用結構 區域112a以及結構區域112a内的錐狀微結構114料入基板内的照射 光線106的折射角度作改變，以控制該平面區域1〇8與該表面區域ιι〇兩 5 M434945 側出射的輝度。當該光源102開啟時，大部分的照射光線1〇6利用結構區 域112a以及錐狀微結構114由平面區域108穿透時，其為高輝度m(箭頭 方向較进者）’藉由基板104呈現不透明(opaque)狀態，使得觀看者1〇9無法 由平面區域108之側看到表面區域110之側的景物’使光學屏隔板1〇〇達 到遮蔽的效果，例如反射箭頭標示l〇9a ;此時，小部分的照射光線1〇6由 表面區域110穿透，其為低輝度113(箭頭方向較疏者），藉由基板1〇4呈現 半透明(translucent)狀態，使得觀看者109可由表面區域n〇之側單方向看 到平面區域108之側的景物，例如穿出箭頭標示1〇%。 如第1B圊所示，當該光源1〇2關閉使該照射光線1〇6並未產生時，該 基板104處於透明狀態。換言之，本發明之光學屏隔板刚利用基板刚 處於透明狀態，使觀看者109可由表域11G之側看到平面區域1〇8之 側的景物，亦可使觀看者109可由平面區域1〇8之侧看到表面區域u〇之 側的景物。 參考第1C圖’其緣示本創作第一實施例中該錐狀微結構m之局部剖 視圖。每一結構區域ma的錐狀微結構114之數量與穿過該平面區域⑽ 的部分光線之輝度成正相關。換言之，藉由調整錐狀微結構114之密度可 控制穿過該平面區域108與表面區域11〇的輝度。該些錐狀微結構ιι4係 以不規則形狀或是規則形狀分布於每一結構區域U2a中，例如是以等距離 排列方式献賴無細(randGmly)幾何雜排财^。在g 1C圖的情況 下’該些錐狀縣構114細不規卿狀分布於每__結構區域ma。該些 錐狀微結構m伽W高度或是酬高倾_側邊⑽的方向分布 於母-結構區域U2a中。在第1C圊的情況下，該些錐狀微結構ιΐ4係以 M434945 不規則南度依據該側邊105的方向分布於每一結構區域ιΐ2小亦即雜狀 微結構m.的高度係由平面區域⑽朝向表面心在不同的實施例 中，在結構區域ma中亦可以是柱狀微結構(未圖示)或是針狀微結構取代 錐狀微結構m，或是任意的凸型微結構(未圖示)來取代錐狀微結構μ。 在實％例令如第1C圖所不，該結構區域心可透職刻該基板 刚的表面區域110上形成，或是可透過機械加工該基板1〇4的表面區域 110上形成結構區域ma，或是以外部貼附層披覆於該基板1〇4的表面區域 110上形成結構區域112a。並且該錐狀微結構114可透過蝴該基板1〇4 的表面區域110上形成，或是可透過機械加工該基板崩的表面區域⑽ 上形成錐狀微結構114，或以外部貼附層披覆於該基板的表面區域ιι〇 上形成錐狀微結構114。 參考第ID ® ’其繪示本創作第—實酬巾#光源開啟以及關時光學 屏板100的各種狀態之前視圖。在冑m圖之⑴中，知原處於關閉狀態， 該基板104的平面區域1〇8係為透明(transparent)狀態；在第1D圖之(2)中， 光源處於關閉狀態，該基板104的表面區域110亦為透明(transparent)狀態。 換s之，由第1D圖之(1)平面區域1〇8之側可看到表面區域11〇之側的人像 116及景物117,亦可由第id圖之(2)表面區域no之侧看到平面區域1〇8 之側的人像116及景物117。 在第1D圖之(3)中，光源處於開啟狀態，該基板1〇4的平面區域1〇8 為咼輝度’使該平面區域108係為不透明(opaque)狀態；在第id圖之(4)中， 光源處於開啟狀態，該基板104的表面區域110為低輝度，該表面區域u〇 係為半透明(translucent)狀態。換言之，從第1D圖之⑶該平面區域1〇8的 7 M434945 外部無法看到表面區域110所遮住的外部的人像116而只能看到外露的景 物117，但是從表面區域u〇的外部可以看到該平面區域108所遮住的外部 人像116以及外露的景物in。該表面區域no與該平面區域1〇8之輝度差 . 異主要在於表面區域110的結構區域U2a以及錐狀微結構114所產生折射 角度的變化’藉以調整穿過表面區域11〇與該平面區域108的輝度。 參考第2A圖以及第2B圖，第2A圖係繪示本創作第二實施例中具有 正反面輝度差的光學屏隔板1〇〇處於非透明狀態之側視圖，第2B圖係繪示 本創作第二實施例中具有正反面輝度差的光學屏隔板1〇〇處於透明狀態之鲁 側視圖。第2A圖以及第2B圖分別類似於第ία圖以及第1B圖，其差異在 於結構區域112b係為複數凸型區域》該光學屏隔板1〇〇包括光源1〇2以及 基板104。光源1〇2設置於基板1〇4的側邊丨〇5。該光源1〇2用以產生一照 射光線106。 在第2A圖以及第2B圖中，該基板104具有一平面區域1〇8、位於該 平面區域108的相對異側之一表面區域11〇、以及位於該平面區域1〇8與該 表面區域110之間的側邊1〇5,該表面區域11〇設有複數結構區域mb，每鲁 -結構區域112b具有複數錐狀微結構114。該些結構區域112b例如是複數 凸型區域。 如第2A圖所示，當該光源1〇2開啟使該照射光線1〇6從該側邊奶進 入該基板1〇4的内部並且分別穿透該平面區域1〇8以及該表面區域則至 該基板1G4的外部’以藉由該些結顧域㈣的錐狀微結構114折射一部 分的照射光線穿出到達該平面區域⑽的外部，並且該些結構區域⑽ 的錐狀微結構114折射另-部分的照射光線1〇6穿出到達該表面區域ιι〇 8 M434945 的外部，使穿過該平面區域108轉分照射光線1〇6之平面輝度大於穿過 該表面區域！㈣^ -部分照射光線之表_度，峨該平面區域⑽ 的外部觀看職板HM時該基板1〇4係處於不透明(啊㈣狀態，並且從該 表面區域11〇的外部觀看該基板1〇4時該基板1〇4係處於半透明㈣ 狀態。換言之，從該平面區域108的外部無法看到表面區域ιι〇的外部的 景物，但纽表面區域11G的外部可以相該平面區域⑽的外部的景物。 .在-實施例中’該平面輝度與該表面輝度的輝度比例介於_ : 4〇%至 95% . 5%之間。另-實施例中，該平面輝度與絲面輝度的輝度比例係為 78%: 22%。又-實施例中，辭面輝度與絲面輝度的輝度比例係為齡 14%。 具體來說’如第2A圖所示，本發明之光學屏隔板1〇〇利用結構區域 112b以及結構區域i12b内的錐狀微結構114將導入基板綱内的照射光線 106的折射角度作改變，以控制該平面區域1〇8與該表面區域ιι〇兩側出射 的輝度。當該光源1〇2開啟時，大部分的照射光線1〇6_結構區域⑽ 以及錐狀微結構1M由平φ區域穿料，其為高輝度u赌頭方向較 密者），藉由基板104呈現不透明(opaqUe)狀態，使得觀看者1〇9無法由平面 區域108之側看到表面區域110之側的景物，使光學屏隔板刚達到遮蔽 的效果；此時，小部分的照射光線106由表面區域11〇穿透，其為低輝度 113(箭頭方向較疏者），藉由基板1〇4呈現半透明狀態，使得觀看者可 由表面區域110之側單方向看到平面區域1〇8之側的景物。 如第2B圖所示，當該光源102關閉時’本發明之光學屏隔板则利用 基板104處於透明狀態，使觀看者1〇9可由表面區域11〇之側看到平面區 9 域108之側的景物，亦可使觀看者109 域110之側的景物。 可由平面區域108之側看到表面區 丈面輝度差的光學屏隔板，當光源開啟時， 側為非透明，以使光學屏隔板具有較佳的 綜上所述’本創作之具有正反 光學屏隔板的一側為透明，另一伯 遮蔽效果。 雖然本創作已聰佳實施_露如上，鮮並非用嫌定本創作，本 創作所屬技術錢巾具有辦知識者，在不_本創作之精神和範圍内， 备可作各種之更動麵飾，目此本創狀保護細纽後附之中請專利範 圍所界定者為準。 【圖式簡單說明】 第1A圖係繪示本創作第一實施例中具有正反面輝度差的光學屏隔板 處於非透明狀態之側視圖。 第1B圖係繪示本創作第一實施例中具有正反面輝度差的光學屏隔板 處於透明狀態之側視圖。 第1C圖係繪示本創作第一實施例中該錐狀微結構之局部剖視圖。 第1D圖係繪示本創作第一實施例中當光源開啟以及關閉時光學屏隔 板的各種狀態之前視圖。 第2A圖係繪示本創作第二實施例中具有正反面輝度差的光學屏隔板 處於非透明狀態之側視圖。 第2B圖係繪示本創作第二實施例中具有正反面輝度差的光學屏隔板 處於透明狀態之側視圖。 【主要元件符號說明】 M434945 100光學屏隔板 102 光源 104基板 105側邊 106照射光線 108 平面區域 109觀看者 109a反射箭頭標示 10%穿出箭頭標示 110 表面區域 111高輝度 112a ' 112b結構區域 113低輝度 114錐狀微結構 116 人像 117景物M434945 V. New description: [New technology field] This creation department has a kind of screen partition, _ is about the kind of optical screen partition with positive and negative luminance difference. [Prior Art] • Conventional technical towel, optical screen partition is finer than the office window or the bathroom table light partition or decoration. A prior art utilizes a microstructure having a side on the light guide plate as the optical screen spacer, the microstructure being semi-shaped. However, the light reflected by the mechanical microstructure is deflected into a large angle of light, and beyond the periphery of the light guide plate, the light guide plate is still transparent, so that the viewer can see through the front side of the light guide plate to the back side, and cannot guide The light panel produces a non-transparent effect. In addition, the prior art is that the white ink is on the substrate, # the ink is white when the substrate is not irradiated with the filament, and the viewer looks at the (four) non-transparent fruit from the plane of the substrate. However, the light refracted by the ink by the brush cannot be controlled, that is, the light intensity of the front and back sides of the substrate cannot be controlled, and the side is not transparent, and the other side is non-transparent, so that the space is separated. The purpose is again limited. Therefore, it is necessary to design a new type of screen partition to solve the above problems. [New content], the purpose of this creation is to provide a kind of positive and negative reversal _ light transmissive partition, at that time by controlling the brightness of the front and back of the optical screen partition, so that the optical screen partition The j 3 side is opaque, and the optical screen spacer has a better shielding effect. The purpose of this invention is to provide an optical panel spacer having a difference in luminance between the front and the back, which includes a light source and a substrate. Shouting and screaming - illuminating the light. The substrate has a planar area, a surface area on the opposite side of the planar area, and a side edge between the planar area and the surface area of the M434945, when the light source is turned on to allow the illumination light to enter the substrate from the side Internally and separately penetrating the planar region and the surface region to the exterior of the substrate, the surface region refracts a portion of the illuminating light to exit to the outside of the planar region, and the surface region refracts another portion of the illuminating light to pass through The outer surface of the surface region, the planar luminance of the illuminating light passing through the portion passing through the planar region is greater than the surface luminance of the illuminating light passing through another portion of the planar region, so that the substrate is opaque from the outside of the planar region, and The substrate is in a translucent state as viewed from the outside of the surface region. According to the above description, the optical screen partition having the difference of the front and back sides of the present invention, when the light source is turned on, controls the brightness of the front and back sides of the optical screen partition to make the side of the optical screen partition translucent, and One side is opaque so that the optical screen partition has a better shielding effect. [Embodiment] Referring to FIG. 1A and FIG. 1B, FIG. 1A is a side view showing an optical panel spacer 1 having a front and back luminance difference in a first embodiment, in a non-transparent state. Fig. 1B is a side view showing the optical panel spacer 1 having the difference in luminance between the front and the back in the first embodiment of the present invention in a transparent state. The optical screen spacer 1 includes a light source 1〇2 and a substrate 1〇4. The light source 1〇2 is disposed on the side 1〇5 of the substrate 104, and may be disposed on the other side 1〇5 of the substrate 1〇4. The light source 102 is used to generate an illumination light 〇6. The light source 1〇2 is, for example, a light-emitting diode ermtted d1〇de' LED), a light tube or any type of light source. In one embodiment, the material of the ruthenium substrate 104 is selected from the group consisting of poly(fluorenyl acrylate vinegar) and the glass, that is, the material of the substrate 1-4 is, for example, a transparent material. In FIGS. 1A and 1B, the substrate 1〇4 has a planar area, a surface area 11〇 opposite the opposite side of the planar area 108, and between the planar area (10) and the M434945 surface area 110. The side edges 105 are provided with a plurality of structural regions H2a, each of which has a plurality of tapered microstructures 114. The structural regions i12a are, for example, a plurality of concave regions. The concave regions are distributed in the surface region 110, for example, in an irregular shape or a regular shape. As shown in FIG. 1A, when the light source 102 is turned on, the illumination light 106 enters the interior of the substrate 104 from the side 105 and penetrates the planar region (10) and the surface region no to the exterior of the substrate 104, respectively. A part of the illuminating light 106 is refracted by the tapered microstructures 114 of the structural regions n2a to reach the outside of the planar region log, and the tapered microstructures 114 of the structural regions U2a refract another portion of the illuminating light 1Q6 to pass through The outer portion of the surface region u is such that the planar luminance of the portion of the illumination ray 1 〇 6 passing through the planar region 108 is greater than the surface luminance of the other portion of the illuminating ray 106 passing through the surface region 110 from the planar region 1 〇 8 The substrate 104 is in an opaque state when the substrate 104 is viewed from the outside, and the substrate 104 is in a translucent state when the substrate 104 is viewed from the outside of the surface region 110. In one embodiment, the luminance ratio of the planar luminance to the surface luminance is between 60% and 40 〇/. To 95%: 5%. In addition, the ratio of the brightness of the flatness to the surface brightness is 78%: 22%. In another embodiment, the ratio of the luminance of the plane luminance to the luminance of the surface is 86%: 14°/. . It should be noted that in the case where the plane luminance is greater than the surface luminance, the ratio between the plane luminance and the surface luminance can be arbitrarily adjusted. Specifically, as shown in FIG. 1A, in order to achieve the above-described front and back surfaces (that is, the difference in luminance between the planar regions 1〇8 and the surface region_, the optical panel spacer of the present invention utilizes the structural region 112a and the structural region. The angle of refraction of the illuminating light 106 incident into the substrate by the tapered microstructures 112 in 112a is varied to control the luminance of the planar region 1 〇 8 and the surface region ιι 5 5 M 434 945 side. When the light source 102 is turned on When most of the illumination light 1 〇 6 is penetrated by the planar region 108 by the structural region 112 a and the tapered microstructure 114 is high luminance m (the direction of the arrow is advanced) 'the opaque state is exhibited by the substrate 104 . Thus, the viewer 1〇9 cannot see the scene on the side of the surface area 110 from the side of the planar area 108, so that the optical screen partition 1 〇〇 is shielded, for example, the reflected arrow indicates l〇9a; at this time, a small part The illuminating light 1 〇 6 is penetrated by the surface region 110, which is a low luminance 113 (the direction of the arrow is relatively thin), and the substrate 1 〇 4 exhibits a translucent state, so that the viewer 109 can be covered by the surface region Side single direction to see The scene on the side of the face area 108, for example, is indicated by an arrow indicating 1%. As shown in FIG. 1B, when the light source 1〇2 is turned off so that the irradiation light 1〇6 is not generated, the substrate 104 is in a transparent state. In other words, the optical panel spacer of the present invention is just in a transparent state, so that the viewer 109 can see the scene on the side of the plane area 1〇8 from the side of the field 11G, and the viewer 109 can be made possible by the plane area 1〇. The side of the surface 8 is seen on the side of the surface area u. Referring to Figure 1C, the partial cross-sectional view of the tapered microstructure m in the first embodiment of the present invention is shown. The tapered microstructure 114 of each structural area ma The number is positively correlated with the luminance of a portion of the light passing through the planar region (10). In other words, the brightness of the planar region 108 and the surface region 11〇 can be controlled by adjusting the density of the tapered microstructures 114. The structure ιι4 is distributed in each of the structural regions U2a in an irregular shape or a regular shape, for example, in an equidistant arrangement, randGmly geometric miscellaneous arranging. In the case of the g 1C graph, the Cone-shaped county structure 114 fine irregular Between each __ structural area ma. The cone-shaped microstructures are gamma-W height or the direction of the height-tilt-side (10) is distributed in the parent-structure region U2a. In the case of the first C圊, the cones The microstructure ιΐ4 is distributed in the direction of the side 105 according to the irregular southness of M434945. The height of each structural region ιΐ2 is small, that is, the height of the miscellaneous microstructure m. The plane region (10) faces the surface center in different embodiments. In the structural region ma, it may be a columnar microstructure (not shown) or a needle-like microstructure instead of a tapered microstructure m, or an arbitrary convex microstructure (not shown) instead of a tapered microstructure. μ. In the case of the actual example, as shown in FIG. 1C, the structural region may be formed on the surface region 110 of the substrate, or the structural region ma may be formed on the surface region 110 of the substrate 1〇4. Or, the structural region 112a is formed by coating the surface region 110 of the substrate 1〇4 with an external attaching layer. And the tapered microstructure 114 can be formed on the surface region 110 of the substrate 1〇4, or the tapered microstructure 114 can be formed on the surface region (10) which is machined by the substrate, or the external layer can be attached. A tapered microstructure 114 is formed on the surface region of the substrate. Refer to the ID ® ''''''''''''''''''' In the 胄m diagram (1), the original is in a closed state, and the planar area 1 〇 8 of the substrate 104 is in a transparent state; in the (1) of FIG. 1D, the light source is in a closed state, and the substrate 104 is Surface area 110 is also in a transparent state. In other words, the portrait 116 and the scene 117 on the side of the surface area 11〇 can be seen from the side of the (1) plane area 1〇8 of the 1D map, and can also be viewed from the side of the surface area no of the (2) id diagram. The portrait 116 and the scene 117 to the side of the plane area 1〇8. In (3) of FIG. 1D, the light source is in an on state, and the planar area 1 〇 8 of the substrate 1 咼 4 is a 咼 luminance ' makes the planar area 108 an opaque state; in the id diagram (4) The light source is in an on state, and the surface region 110 of the substrate 104 has a low luminance, and the surface region u is in a translucent state. In other words, the external figure 116 blocked by the surface area 110 cannot be seen from the outside of the 7 M434945 of the plane area 1〇8 of the (3) of the 1D figure, and only the exposed scene 117 can be seen, but from the outside of the surface area u〇 The external portrait 116 and the exposed scene in which the planar area 108 is hidden can be seen. The surface area no is different from the luminance of the planar area 1〇8. The difference lies mainly in the structural area U2a of the surface area 110 and the change in the refractive angle generated by the tapered microstructure 114, by which the through-surface area 11〇 and the planar area are adjusted. The brightness of 108. Referring to FIG. 2A and FIG. 2B, FIG. 2A is a side view showing the optical screen spacer 1 having the difference in front and back luminance in the second embodiment of the present invention in a non-transparent state, and FIG. 2B is a view In the second embodiment, the optical screen spacer 1 having the difference in front and back luminance is in a transparent side view. 2A and 2B are respectively similar to the αα and 1B, respectively, and the difference is that the structural region 112b is a complex convex region. The optical panel spacer 1 includes the light source 1〇2 and the substrate 104. The light source 1〇2 is disposed on the side edge 5 of the substrate 1〇4. The light source 1〇2 is used to generate an illumination ray 106. In FIGS. 2A and 2B, the substrate 104 has a planar area 1〇8, a surface area 11〇 on the opposite side of the planar area 108, and a planar area 1〇8 and the surface area 110. Between the sides 1 〇 5, the surface region 11 is provided with a plurality of structural regions mb, and each of the ru-structure regions 112b has a plurality of tapered microstructures 114. The structural regions 112b are, for example, a plurality of convex regions. As shown in FIG. 2A, when the light source 1〇2 is turned on, the illumination light 1〇6 enters the inside of the substrate 1〇4 from the side milk and penetrates the planar area 1〇8 and the surface area, respectively. The outer portion of the substrate 1G4 is refracted by a portion of the illumination light refracted by the tapered microstructures 114 of the plurality of regions (4) to reach the outside of the planar region (10), and the tapered microstructures 114 of the structural regions (10) refract - part of the illuminating light 1 〇 6 passes out to the outside of the surface area ι 〇 8 M434945, so that the plane luminance passing through the plane area 108 to illuminate the light 1 〇 6 is greater than passing through the surface area! (4) ^ - Part of the illuminating light _ degree, the outer surface of the planar area (10) is viewed when the substrate 1 〇 4 is in an opaque (ah (four) state), and the substrate is viewed from the outside of the surface area 11 〇 At 4 o'clock, the substrate 1〇4 is in a semi-transparent (four) state. In other words, the external scene of the surface area ιι〇 cannot be seen from the outside of the planar area 108, but the exterior of the new surface area 11G may be outside the planar area (10). In the embodiment, the ratio of the luminance of the plane luminance to the luminance of the surface is between _: 4〇% and 95%. 5%. In another embodiment, the luminance of the plane and the luminance of the surface are The luminance ratio is 78%: 22%. In the embodiment, the luminance ratio of the surface luminance to the silk luminance is 14%. Specifically, as shown in FIG. 2A, the optical screen spacer of the present invention 1) utilizing the structural region 112b and the tapered microstructure 114 in the structural region i12b to change the angle of refraction of the illumination ray 106 introduced into the substrate to control the planar region 1 〇 8 and the surface region ιι 出Brightness. When the light source 1〇2 is turned on, most of The illumination light 1〇6_ structural region (10) and the tapered microstructure 1M are punctured by a flat φ region, which is a high-intensity u-header direction, and the substrate 104 exhibits an opaque (opaqUe) state, so that the viewer 1〇9 can not see the scene on the side of the surface area 110 from the side of the planar area 108, so that the optical screen partition just reaches the shielding effect; at this time, a small portion of the illumination light 106 is penetrated by the surface area 11〇, which is The low luminance 113 (the direction of the arrow is thinner) is rendered semi-transparent by the substrate 1〇4, so that the viewer can see the scene on the side of the planar area 1〇8 from the side of the surface area 110 in a single direction. As shown in Fig. 2B, when the light source 102 is turned off, the optical screen spacer of the present invention is in a transparent state by the substrate 104, so that the viewer 1 〇 9 can see the planar area 9 of the surface 108 from the side of the surface area 11 108 The side scene can also make the viewer 109 the side of the field 110. The optical screen partition with a difference in surface area of the surface area can be seen from the side of the planar area 108. When the light source is turned on, the side is opaque, so that the optical screen partition has a better overall. One side of the reflective optical screen partition is transparent, and the other side is shielded. Although this creation has been implemented by Congjia _ as above, it is not the use of the original creation. The technical money towel of this creation has the knowledge of the person. In the spirit and scope of this creation, This patent protection fine is attached as defined in the patent scope. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a side view showing the optical panel spacer having a difference in luminance between front and back in the first embodiment of the present invention in a non-transparent state. Fig. 1B is a side view showing the optical panel spacer having the difference in luminance between the front and the back in the first embodiment of the present invention in a transparent state. Figure 1C is a partial cross-sectional view showing the tapered microstructure in the first embodiment of the present invention. Fig. 1D is a front view showing various states of the optical panel spacer when the light source is turned on and off in the first embodiment of the present creation. Fig. 2A is a side view showing the optical screen spacer having the difference in luminance between the front and the back in the second embodiment of the present invention in a non-transparent state. Fig. 2B is a side view showing the optical panel spacer having the difference in luminance between the front and the back in the second embodiment of the present invention in a transparent state. [Main component symbol description] M434945 100 optical screen spacer 102 light source 104 substrate 105 side 106 illumination light 108 plane area 109 viewer 109a reflection arrow mark 10% out arrow indication 110 surface area 111 high luminance 112a '112b structure area 113 Low-intensity 114 cone-shaped microstructures 116 portraits 117 scenes