M361034 -五、新型說明： - 【新型所屬之技術領域】 本創作係關於一種投影螢幕，特別是一種反射式的投影 螢幕。 【先前技術】 投影螢幕是-種可朗來分散來自投影機之投射光的光 4·螢幕。在技射光的方向固定、光通量不變的情況下，投影 螢幕所反射的光束亮度與人眼可接受的理想亮度之比值被定 義為投影螢幕所反㈣光束方向上的亮度餘，亮度係數的 隶大值係定義為投影螢幕的增益值(gain)，用以表示投影螢幕 反射投影光束的能力。 請參照圖1，習知的反射式投影螢幕1〇〇的底層為一不 透光基材110，不透光基材110上有-層光可穿透性材質 130，光可穿透性材質13〇含有許多透明的玻璃珠㈣琴恤 glass bead)120。在光可穿透性材質13〇上有另一層折射率不 同的光可牙透性材質140。光可穿透性材質具有一連續 的菱鏡(prism)結構150，菱鏡結構15〇之一表面被一黑色的 遮光層(black shading layer)l52所覆蓋，用以吸收外界的環境 光(ambient light)A。 由投影機(未圖示)斜向入射的光束R可經由菱鏡結構 150之另一未被遮光層152覆蓋的表面進入投影螢幕1〇〇 中，通過不同折射率的光可穿透性材質14〇及13〇而進入玻 璃珠120。因為光可穿透性材質13〇的底部為不透光基材 110，且不透光基材110具有反射光束的功能，所以入射光尺 3 M361034 會被不透光基材110反射而射出投影螢幕100。 請參照圖2,為另一習知的反射式投影螢幕102,其與圖 1的差異性在於在光可穿透性材質130之上具有一層不同折 射率的光可穿透性材質141。光可穿透性材質141上沒有菱 鏡結構150，而且也沒有遮光層152。M361034 - V. New description: - [New technical field] This creation is about a projection screen, especially a reflective projection screen. [Prior Art] The projection screen is a kind of light that can disperse the projection light from the projector. In the case where the direction of the technical light is fixed and the luminous flux is constant, the ratio of the brightness of the beam reflected by the projection screen to the ideal brightness acceptable to the human eye is defined as the brightness of the inverse (four) beam direction of the projection screen, and the brightness coefficient is The large value is defined as the gain value of the projection screen to indicate the ability of the projection screen to reflect the projected beam. Referring to FIG. 1 , the bottom layer of the conventional reflective projection screen 1 is an opaque substrate 110 , and the opaque substrate 110 has a layer of light transmissive material 130 and a light transmissive material. 13 〇 contains many transparent glass beads (four) piano glasses bead) 120. On the light-permeable material 13 有 there is another layer of photo-permeable material 140 having a different refractive index. The light transmissive material has a continuous prism structure 150, and one surface of the prism structure 15 is covered by a black shading layer l52 for absorbing ambient light (ambient) Light)A. The light beam R obliquely incident by the projector (not shown) can enter the projection screen 1 through another surface of the prism structure 150 that is not covered by the light shielding layer 152, and the light transmissive material with different refractive indexes 14 〇 and 13 〇 enter the glass beads 120. Because the bottom of the light-permeable material 13〇 is the opaque substrate 110, and the opaque substrate 110 has the function of reflecting the light beam, the incident light ruler 3 M361034 is reflected by the opaque substrate 110 to project the projection. Screen 100. Referring to FIG. 2, another conventional reflective projection screen 102 differs from FIG. 1 in that it has a light transmissive material 141 having a different refractive index over the light-permeable material 130. The light-transmissive material 141 has no mirror structure 150 and no light-shielding layer 152.
由投影機P射出的正向光R1經由光可穿透性材質 進入投影螢幕102中，接著穿過玻璃珠120，再被光可穿透 性材處130之底部的不透光基材no反射，依循幻、幻、 R4、R5路徑出射。 在圖1的習知技術中，菱鏡結構150上的遮光層152雖 然可以吸收外界的環境光A，但是也會因為阻播了投影機的 入射光R的行進而降低投影螢幕1〇〇增益值。 在圖2的習知技術中，投影螢幕1〇2由於沒有遮光岸 I52 ’所以其增益值相對地較高，但因為其入射光則會從^ 同的角度出光而不夠集中，所以投影螢幕102的增益值仍可 能不足。 【新型内容】 本創作之目触於提供—種具有高增健的投影肇幕。 徵中=::和優點可以從本創作所揭露的技術特 之一 喊找他㈣，本創作 膜及基材。角錐菱鏡陣列 射 單元係提供-錐狀表㊉Λ稷數個角錐早几，每一角錐 反射膜形成於這些角錐單元之錐狀 4 M361034 -4The forward light R1 emitted by the projector P enters the projection screen 102 via the light-permeable material, then passes through the glass beads 120, and is reflected by the opaque substrate no at the bottom of the light-permeable material 130. Follow the illusion, fantasy, R4, R5 path. In the prior art of FIG. 1, the light shielding layer 152 on the prism structure 150 can absorb the ambient light A of the outside world, but also reduces the gain of the projection screen by blocking the traveling of the incident light R of the projector. value. In the prior art of FIG. 2, the projection screen 1〇2 has a relatively high gain value because there is no shading shore I52', but since the incident light is emitted from the same angle and is not concentrated enough, the projection screen 102 is projected. The gain value may still be insufficient. [New Content] The purpose of this creation is to provide a projection screen with high growth. The levy =:: and the advantages can be called from the special technology disclosed in this creation (4), the film and substrate. Angular Mirror Array The unit provides a cone-shaped table with dozens of pyramids. Each pyramid is formed in the cone of these pyramids. 4 M361034 -4
表面上。基材形成於反射膜上。 角雜ΐ:實&角錐菱鏡陣列之每—角錐單元係為一三 角，早兀，這些二角錐單元係排列成—矩形陣歹I】。每一三 錐單元具有一底面及三侧面，每一备σ _ 一 ^卜 ’母—角錐早几的底面係為正 =角形’母—三胁單元的這些側面係為全等的等腰直角三 ^形三並且每-三角錐單元的這些側面分別連接底面的三 、，每一二角錐單兀的每相鄰的兩侧面係互相垂直。這些三 角錐單元之這些底面適於面向—投影機而組·錐菱鏡陣列 之一入光面，入光面係與錐狀表面相對。 在-實施例中，角錐菱鏡陣列之入光面可以是一粗链表 面’或是-摻人複數_餘子的平滑表面，或包括微球面 凸起。 在一貧施例中，這些三角錐單元之底面上係塗佈一擴散 粒子與黏膠的混合物層。混合物層塗佈於這些三角錐單元之 這些底面上。混合物層具有適於面向一投影機的一入光面， 混合物層之入光面包括複數個微球面凸起。 在以上貫施例中，角錐菱鏡陣列包括一透明材料，基材 係為一軟性基材。 本創作之實施例以角錐菱鏡陣列搭配其上之反射膜而改 善投景>螢幕之反射功能，使大多數的入射光適於被反射並且 集中到觀察者眼中，達到高增益的效果。 【實施方式】 有關本創作之前述及其他技彳标内容、特點與功效，在以 下配合參考圖式之一實施例的詳細說明中，將可清楚的呈 5 M361034 現。以下實施例中所提到的方向用語，例如：上、下、左、 右、前或鮮，僅是參相加圖式的方向。因此，使用=方 向用語是用來說明並非用來限制本創作。 請參照圖3，為本創作之一實施例的投影#幕的側視 圖。投影營幕300包括-角錐菱鏡陣列(c〇mercubeprism 觀y)320、-反射膜340及一基材。角錐菱鏡陣列32〇 位於投影螢幕300之面向投影機p之正面側。基材位於 投影榮幕3GG之背關，職支撐及賴投影螢幕·。反On the surface. The substrate is formed on the reflective film. Angular scorpion: The real & angle cone mirror array is a three-corner, and the two-corner cones are arranged in a rectangular array I]. Each of the three-cone units has a bottom surface and three side surfaces, and each of the bottom surfaces of each of the σ _ _ 卜 'mother-corner cones is positive = angled. The sides of the mother-three-threshold unit are congruent right angles. The three sides are three and each of the sides of the triangular pyramid unit are respectively connected to three of the bottom surfaces, and each adjacent two sides of each of the two pyramids are perpendicular to each other. The bottom surfaces of the triangular pyramid elements are adapted to face the projection surface of the projector and the cone mirror array, and the light incident surface is opposite to the tapered surface. In an embodiment, the illuminating surface of the pyramidal mirror array may be a thick-chain surface or a smooth surface incorporating a plurality of ridges or a microsphere bulge. In a lean embodiment, the bottom surface of the triangular pyramid unit is coated with a layer of a mixture of diffusing particles and a binder. A layer of the mixture is applied to the bottom surfaces of the triangular pyramid units. The mixture layer has a light incident surface adapted to face a projector, and the light incident surface of the mixture layer includes a plurality of microsphere projections. In the above embodiments, the pyramidal mirror array comprises a transparent material and the substrate is a soft substrate. The embodiment of the present invention improves the reflection function of the projection screen by using a pyramidal mirror array with a reflective film thereon, so that most of the incident light is suitable to be reflected and concentrated in the observer's eye to achieve a high gain effect. [Embodiment] The foregoing and other technical contents, features and effects of the present invention will be clearly shown in the following detailed description of an embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, for example, up, down, left, right, front or fresh, are only the direction of the phase addition. Therefore, the use of the = direction terminology is used to illustrate that it is not intended to limit the creation. Please refer to FIG. 3, which is a side view of a projection screen of an embodiment of the present invention. The projection screen 300 includes a pyramidal mirror array (c), a reflective film 340, and a substrate. The pyramid mirror array 32 is located on the front side of the projection screen 300 facing the projector p. The substrate is located at the back of the projection of the 3GG, the support and the projection screen. anti-
射膜340設於角錐菱鏡陣列32〇與基材36〇之間，適於反 由投影機P射出之本.垂。 ' 請參照圖3A，為本實施例之角錐菱鏡陣列32〇的上視 圖。角錐菱鏡陣列320自複數個角錐單元緊密排列而組成陣 列狀，例如圖示之三角錐單元322。每一個三角錐單元奶 係提供-錐絲φ 322a，這麟絲面322a_而成角錐 菱鏡陣列32G之-凹凸表面324。再參照圖3，高反射率的反 射膜340鑛於角錐菱鏡陣列32〇之這些錐狀表面3瓜上，適 於將入射，反射至觀察者處。基材360覆蓋於反射膜34〇上。 適用於本貫施例的反射膜34〇的反射率範圍為〇 8至〇 ι。 清麥照圖3B，三角錐單元322由一個底面321和三個側 面^23，組成。底面321係為正三角形，這些側面323係為 全等的等腰直角三角形。三侧面323分別連接於底面321 的二邊’二個側面323組成錐狀表面322a且每相鄰的兩側面 323係彼此垂直。 在一實施例中，三角錐單元322為透明材質。在圖3之 投影螢幕300中，三角錐單元322的底面321適於面向投影 6 M361034 機P而組成角錐菱鏡陣列320之一入光面，角錐菱鏡陣列32〇 之入光面適於接受來自於投影機p的人射光。換句話說，底 面321係與這些錐狀表面322a相對。 一 附帶-提的是’基材360覆蓋住三角錐單元322之錐狀 表面322a的尖端’藉此可避免投影螢幕3〇〇於捲曲過程中造 成二角錐單兀奶❺尖端折損，或投影螢幕3()㈣入光面遭 三角錐單元322的尖端刺傷。The film 340 is disposed between the pyramidal mirror array 32A and the substrate 36A, and is adapted to be inverted from the projection of the projector P. Referring to Fig. 3A, a top view of the pyramidal mirror array 32A of the present embodiment is shown. The pyramid mirror array 320 is closely arranged from a plurality of pyramid units to form an array, such as the illustrated triangular cone unit 322. Each of the triangular cone unit milk systems provides a taper wire φ 322a which is a concave-convex surface 324 of the pyramidal mirror array 32G. Referring again to Figure 3, a highly reflective retroreflective film 340 is deposited on the tapered surfaces 3 of the pyramidal mirror array 32 to reflect incidents and reflect to the viewer. The substrate 360 is overlaid on the reflective film 34. The reflectance of the reflective film 34〇 suitable for the present embodiment ranges from 〇 8 to 〇 ι. As shown in Fig. 3B, the triangular pyramid unit 322 is composed of a bottom surface 321 and three side surfaces ^23. The bottom surface 321 is an equilateral triangle, and these side surfaces 323 are congruent isosceles right triangles. The three side faces 323 are respectively connected to the two sides 323 of the bottom surface 321 to form a tapered surface 322a and each adjacent two side faces 323 are perpendicular to each other. In an embodiment, the triangular cone unit 322 is a transparent material. In the projection screen 300 of FIG. 3, the bottom surface 321 of the triangular cone unit 322 is adapted to face the projection 6 M361034 machine P to form a light incident surface of the pyramid mirror array 320, and the entrance surface of the pyramid mirror array 32 is adapted to receive The person from the projector p shoots light. In other words, the bottom surface 321 is opposed to the tapered surfaces 322a. Incidentally, the 'substrate 360 covers the tip end of the tapered surface 322a of the triangular cone unit 322', thereby preventing the projection screen 3 from being damaged during the crimping process, or the projection screen 3 () (4) The entrance surface is stabbed by the tip of the triangular cone unit 322.
另外’在三角錐單元322的底面321做粗糙微結構或換 子’可以擴散反射光，增加可視角’適合作為投影 螢幕300的入光面與出光面。 如圖4A ’在-實施例的投影榮幕3〇〇a巾，角錐菱鏡陣 列320a之入光面(三角錐單元的底面)3施係經加工處理成為 -粗糙表面。在本實關中’肖錐魏_島之粗繞的入 光面326a可包括複數個微球面凸起幻7。 =圖4B，在-實施_投影絲攝巾，肖錐菱鏡陣 擴散粒子328。Further, a rough microstructure or a change is made on the bottom surface 321 of the triangular pyramid unit 322 to diffuse the reflected light, and the angle of view is increased to be suitable as the light incident surface and the light exit surface of the projection screen 300. As shown in Fig. 4A', in the projection of the embodiment, the light incident surface (the bottom surface of the triangular pyramid unit) 3 of the pyramidal mirror array 320a is processed to become a rough surface. In this actual context, the thickened light incident surface 326a of the 'Shaw cone Wei_ island may include a plurality of microsphere surface convex illusions 7. = Fig. 4B, in-implementation_projection silk towel, xiao cone mirror array diffusion particle 328.
如圖4C / — B例的投料幕遍巾，角錐菱鏡陣 之入光面326c上係塗佈—擴散層38〇，其為擴散粒 郷384的混合物。在本實施例中，擴散層38〇之 =立子382可凸出於擴散層勘之面向投影機p之入光面 386而形成微球面凸起382&。 採用 在以上實施例中’肖錐魏_ 32〇, 32〇a，32%，320c可 —透明材料製作，基材可採用-軟性基材。 7 M361034 請參照圖5 ’角錐菱鏡陣列320之三角錐單元322的光 學特性為：入射光I自底面321射入，接著在三個侧面323 各發生一次反射，最後再從底面321射出，圖中的虛線圈表 不光束與底面321或側面323的交會處。入射光I與出射光 0互相平行，也就是說，光束以什麼角度進入，就會以相同 的角度反射回來，因此只要觀察者在投影機附近的位置觀看 螢幕，大多數的投影光束都會反射進入觀察者的眼睛，達到 高增益或高亮度的效果。 請同時參照圖3 ' 3A、3B及圖6，在一實施例的投影螢 幕300中，三角錐單元322的底面321為正三角形，其邊長 為〇·〇5亳米(millimeter，mm)。在一實施例中，角錐菱鏡陣列 320係為一矩形陣列，其在χ方向例如可為2〇行，在乂方 向例如可為10列，共包括2〇〇個三角錐單元322。 如圖6所示’在一實施例的測試中，投影機p的鏡頭與 投影螢幕300相距20mm(虛線)，並與投影螢幕3〇〇的下緣切 齊，亦即’投影機p的鏡頭與投影螢幕300的下緣同位於χ_ζ 平面上，投影機Ρ的鏡頭對準投影螢幕3〇〇的中心位置。在 投影機Ρ前方可建-個〇.l8mm(平行χ車由）x 〇15m叫平行^ =)的接收面400，用以量測投影螢幕3〇〇之反射光的光通 I。結果顯示’反射回接收面400上的光通量為入射投影榮 幕300之光通量的60.9%。 如圖7所不，在另-實施例的測試中，將投影螢幕· 2光面平均地分成九個格子，其位置的標號分別為丨至9。 觀祭二個不同咼度的位置2、5及8的反射光光型。 請參照圖8、9及1〇分別表示位置2、5及8的反射光 M361034 方向的角度，縱軸是光輝度值。三圖中的最 位詈2別在身、_6。、及2。，此時投影機P的綱至 連線與X-z平面的夾角Θ1, Θ2及Θ3分別為 .、.及Zl。。這表示在不同高度的位置上，大多數的 莫都有機目被反射就集巾到觀察者眼巾，達到高增益的效 果0 {•隹以上所述者’僅為本創作之實施例而已，當不能以此 限定本叙侧，即大驗本解ttf專纖圍及新As shown in Fig. 4C / - B, the feeding screen is covered by a towel, and the light-incident surface 326c of the pyramidal mirror array is coated with a diffusion layer 38, which is a mixture of diffusion particles 384. In this embodiment, the diffusion layer 38 can be protruded from the light incident surface 386 of the projector p to form a microspherical protrusion 382 & In the above embodiment, 'Shaw cone Wei _ 32 〇, 32 〇 a, 32%, 320 c can be made of a transparent material, and the substrate can be a soft substrate. 7 M361034 Referring to FIG. 5, the optical characteristic of the triangular pyramid unit 322 of the pyramidal mirror array 320 is that the incident light I is incident from the bottom surface 321 and then reflected once on each of the three side surfaces 323 and finally from the bottom surface 321 . The dashed circle in the table does not intersect the light beam with the bottom surface 321 or the side surface 323. The incident light I and the outgoing light 0 are parallel to each other, that is, at what angle the light beam enters, it will be reflected back at the same angle, so most of the projection beam will be reflected as long as the observer views the screen at a position near the projector. The observer's eyes achieve high gain or high brightness. Referring to Fig. 3 '3A, 3B and Fig. 6, respectively, in the projection screen 300 of an embodiment, the bottom surface 321 of the triangular pyramid unit 322 is an equilateral triangle having a side length of 〇·〇5 亳m (millimeter, mm). In one embodiment, the pyramid mirror array 320 is a rectangular array which may be, for example, 2 turns in the x-direction and 10 columns in the z-direction, and includes a total of 2 triangular pyramid units 322. As shown in FIG. 6 'in the test of an embodiment, the lens of the projector p is 20 mm (dotted line) from the projection screen 300 and is aligned with the lower edge of the projection screen 3 , that is, the lens of the projector p The same as the lower edge of the projection screen 300 is located on the χ_ζ plane, and the lens of the projector 对准 is aligned with the center of the projection screen 3〇〇. In front of the projector, a receiving surface 400 of 〇.l8mm (parallel braking) x 〇15m called parallel ^=) can be built to measure the light I of the reflected light of the projection screen. The results show that the amount of light reflected back onto the receiving surface 400 is 60.9% of the luminous flux incident on the projection screen 300. As shown in Fig. 7, in the test of the other embodiment, the projection screen 2 is evenly divided into nine grids, and the positions are denoted by 丨 to 9. Observe the reflected light patterns of positions 2, 5 and 8 of two different twists. Referring to Figures 8, 9, and 1 respectively, the angles of the reflected light M361034 at positions 2, 5, and 8 are shown, and the vertical axis is the luminance value. The most 詈2 in the three figures is in the body, _6. And 2. At this time, the angle between the line of the projector P and the X-z plane Θ1, Θ2 and Θ3 are respectively ., . and Zl. . This means that at different heights, most of the organic elements are reflected and the towel is collected into the observer's eyelids to achieve a high gain effect. {{• The above mentioned is only an embodiment of the present creation. When it is not possible to limit this side of the article, that is, the test of the ttf special fiber and new
型既，内容所作之簡單料效變化與修飾’皆域本創作專 利心蓋之範圍内。另外本創作的任—實施例或巾請專利範圍 不須達成本創作所揭露之全部目的或優點或魏。此外，摘 要部分和標職是絲漏翻讀搜尋之用，並非用來限 制本創作之權利範圍。 义 【圖式簡單說明】 圖1為習知的反射式投影螢幕示意圖。 圖2為習知的反射式投影螢幕示意圖。 圖3為本創作之一實施例之投影螢幕側視示意圖 菱鏡 圖3A為根據本創作之一實施例的投影螢幕之角錐 陣列上視示意圖。 圖3B為根據本創作之一實施例的投影螢幕之角錐菱梦 陣列的角錐單元示意圖。 免鏡 圖4A為本創作之一實施例的投影螢幕側視示意圖。 圖4B為本創作之一實施例的投影螢幕侧視示意圖。 圖4C為本創作之一實施例的投影螢幕側視示意 9 M361034 圖5為根據本創作之一實施例的投影螢幕之角錐菱於陣 列的角錐單元光學特性示意圖。 兄 ^ 圖6及圖7為本創作之一實施例的投影螢幕之反射光量 測示意圖。 圖8至圖1〇為本創作之一實施例的投影螢幕之反射光量 測結果示意圖。 【主要元件符號說明】 • 習知的反射式投影螢幕100,102 • 不透光基材110 透明的玻璃珠120The type, the simple material effect changes and modifications made by the content are all within the scope of this creation. In addition, the scope of the invention or the scope of the invention is not required to achieve all of the objects or advantages disclosed herein. In addition, the abstract and the standard are used for the search of the missing words and are not intended to limit the scope of the creation. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] is a schematic view of a conventional reflective projection screen. 2 is a schematic diagram of a conventional reflective projection screen. 3 is a side view of a projection screen of an embodiment of the present invention. FIG. 3A is a top view of a pyramid array of a projection screen according to an embodiment of the present invention. FIG. 3B is a schematic diagram of a pyramid unit of a pyramidal angle array of a projection screen according to an embodiment of the present invention. FIG. Figure 4A is a schematic side view of a projection screen of one embodiment of the present invention. 4B is a side elevational view of a projection screen of one embodiment of the present invention. 4C is a schematic side view of a projection screen according to an embodiment of the present invention. FIG. 5 is a schematic diagram showing optical characteristics of a pyramidal unit of a projection screen according to an embodiment of the present invention. Brothers Fig. 6 and Fig. 7 are schematic diagrams showing the measurement of reflected light of a projection screen according to an embodiment of the present invention. 8 to FIG. 1 are schematic diagrams showing the measured results of the reflected light of the projection screen according to an embodiment of the present invention. [Main component symbol description] • Conventional reflective projection screen 100, 102 • opaque substrate 110 transparent glass beads 120
光可穿透性材質130, 140, 141 菱鏡結構150 遮光層152 投影機P 光出射路徑R2、R3、R4、R5 本創作之投影螢幕300, 300a, 300b, 300c 角錐菱鏡陣列320, 320a, 320b, 320c 三角錐單元之底面321 三角錐單元322 錐狀表面322a 三角錐單元之側面323 凹凸表面324 M361034 角錐菱鏡陣列之入光面326a，326b，326c 微球面凸起327 反射膜340 基材360 擴散層380 •擴散粒子328, 382 ' 微球面凸起382a • 黏膠384 擴散層之入光面386 接收面400 11Light-transmissive material 130, 140, 141 Mirror structure 150 Light-shielding layer 152 Projector P Light-emitting path R2, R3, R4, R5 Projection screens 300, 300a, 300b, 300c of the original creation 320, 320a , 320b, 320c The bottom surface of the triangular cone unit 321 The triangular cone unit 322 The tapered surface 322a The side surface of the triangular cone unit 323 The concave and convex surface 324 M361034 The entrance surface of the pyramidal mirror array 326a, 326b, 326c The microsphere surface protrusion 327 The reflection film 340 base Material 360 Diffusion Layer 380 • Diffusion Particles 328, 382 'Microspherical Protrusions 382a • Adhesive 384 Diffusion Layer of Light Entry Surface 386 Receiving Surface 400 11