M383750 五、新型說明： 【新型所屬之技術領域】 [0001] 本創作係有關於一種利用微結構消除亮點之導光板 構造，特別是指於導光板出光面上位於點光源之前方位 置處設置複數個内凹之微結構’而降低明暗紋及斜紋等 亮點現象至不影響出光效果。 [先前技術] [0002] 近年來，薄形化之手機、液晶鈕示器或液晶電視等M383750 V. New Description: [New Technology Field] [0001] This creation is about a light guide plate structure that uses a microstructure to eliminate bright spots, especially when a light number is placed on the light exit surface of the light guide plate at a position before the point light source. A concave microstructure" reduces the bright spots such as light and dark lines and twill to the light-emitting effect. [Prior Art] [0002] In recent years, thinned mobile phones, liquid crystal buttons, or LCD TVs, etc.
3C電子產品已成為主流趨勢，且因為環保節能的問題， 上述3C產品之背光模組中所使用之冷陰極管（CCFL)光 源將逐步被淘汰，而發光二極體（LED)則成為下一代主 要光源，但在側光式背光模組中，以LED做為光源時產生 一新的問題一HOT SPOTS (亮點現象-含斜紋現象）[請 參閱附件一’係為本創作之創作人以數值分析模擬HOT SPOTS現象之模擬圖]，因為原本CCFL屬於線光源，而 LED屬點光源，同時有著發光錐角的限制，故在LED發光 進入導光板後，會有一發光錐角，因此造成了入光側有 明顯的明暗現象，而美國專利第6065845號「Lighting device, liquid crystal display device and electronic equipment」提出以LED做為光源時，於 導光板入光側加上半圓形結構柱狀，半圓形柱狀結構於 此處可近似為Lens (透鏡）的結構，在未加入半圓形柱 狀前由於光線進入PMMA (即導光板主要材質）後，折射 角為±42.15。，故在相鄰的二個LED之間會因折射角的 關係而形成暗區，而加入半圓形柱狀結構後則可達到散 表單編號A0101 第3頁/共15頁 M383750 射光線之作用，藉以獲得均勻光強度分佈，另外，中華 民國2005年，林奇鋒所著「V型溝槽角度在配光曲線之影 響」中指出，其入光面有加上V型溝時，光線受V型溝影 響可發現當V型溝的角度越大時，則其散射光線的能力越 強，故由此研究可獲得利用入光V型溝結構使進入導光板 的光場型產生變化，達到使近入光側之出光面能有均勻 的出光，進而消除HOT SPOTS。 由於一般導光板之出光面及底面若無任何微結構， 則光線必然在導光板中不斷進行全反射而無法出光，故 需要於導光板出光面及底面加上微結構破壞光線的全反 射而達到出光的目地，而可破壞全反射的微結構包括有 網點、V形切槽（V-CUT)、喷砂形成之微凹槽（喷砂面 )等結構，而為使出光更為均勻，會在導光板之出光面 施以喷砂而產生許多均勻分佈之微凹槽（喷砂面），而 此時若於導光板底面設置V形切槽時，則會產生HOT SPOTS的變形缺陷-斜紋現象[請參閱附件二，係為斜紋現 象之示意圖]，此時，光以上述前案之方法將無法有效降 低斜紋現象至不影響出光之效果。 【新型内容】 [0003] 爰此，為解決導光板之出光面配置均勻分佈之微凹 槽（喷砂面），而導光板底面設置V形切槽所產生之明暗 紋及斜紋等亮點現象，故本創作提供一種利用微結構消 除亮點之導光板構造，包括： 一板體，其具有一出光面，鄰接該出光面係至少設 置一入光面，相對該出光面則具有一底面，而該出光面 表單編號A0101 第4頁/共15頁 M383750 上係分佈複數個微凹槽，又該出光面周緣係具有一膠框 區，而該底面上則分佈複數v型切槽；複數個點光源，係 呈兩兩相間隔，而連接於該板體之入光面；又，係於該 出光面上位於任一該些點光源前方位置處設置複數個内 凹之微結構。3C electronic products have become the mainstream trend, and because of environmental protection and energy saving, the cold cathode tube (CCFL) light source used in the backlight module of the above 3C products will be gradually eliminated, and the light emitting diode (LED) becomes the next generation. The main light source, but in the edge-lit backlight module, the LED as a light source creates a new problem - HOT SPOTS (bright spot phenomenon - including twill phenomenon) [Please refer to Appendix I for the creation of the author's numerical value Analyze the simulation of the HOT SPOTS phenomenon], because the original CCFL belongs to the line source, and the LED is a point source, and has a limitation of the cone angle. Therefore, after the LED enters the light guide, there will be a cone angle, thus causing the entrance. The light side has a clear light and dark phenomenon, and the US Patent No. 6065845 "Lighting device, liquid crystal display device and electronic equipment" proposes to use a LED as a light source, and a semicircular structure column on the light entrance side of the light guide plate, half The circular columnar structure can be approximated here as a Lens structure. After the light enters the PMMA (ie, the main material of the light guide plate), it is folded before the semi-circular column is added. Angle is ± 42.15. Therefore, a dark area is formed between the adjacent two LEDs due to the relationship of the refraction angle, and after adding the semi-circular columnar structure, the effect of the scattered form number A0101, page 3/15 pages, M383750, can be achieved. In order to obtain a uniform light intensity distribution, in addition, in the Republic of China in 2005, Lin Qifeng’s "V-shaped groove angle in the influence of the light distribution curve" pointed out that when the V-groove is added to the light-incident surface, the light is subjected to V-type. The influence of the groove can be found that the larger the angle of the V-shaped groove is, the stronger the ability to scatter light is. Therefore, it is possible to obtain a change in the light field type entering the light guide plate by using the V-shaped groove structure. The light-emitting surface on the light-incident side can have a uniform light output, thereby eliminating the HOT SPOTS. Since the light-emitting surface and the bottom surface of the general light guide plate do not have any microstructure, the light must be continuously reflected in the light guide plate to be completely reflected, so that it is necessary to add total reflection of the micro-structural light to the light-emitting surface and the bottom surface of the light guide plate. The structure of the light exiting, and the structure that can destroy the total reflection includes a structure such as a mesh point, a V-shaped cut groove (V-CUT), a micro-groove formed by sandblasting (a sandblasted surface), and the like, in order to make the light more uniform, Applying sandblasting on the light-emitting surface of the light guide plate produces a plurality of uniformly distributed micro-grooves (blasting surfaces). At this time, if a V-shaped groove is provided on the bottom surface of the light guide plate, a deformation defect of the HOT SPOTS is generated - a twill Phenomenon [Please refer to Appendix 2, which is a schematic diagram of the twill phenomenon]. At this time, the light in the above method will not effectively reduce the twill phenomenon to the effect of light emission. [New content] [0003] In order to solve the problem that the light-emitting surface of the light guide plate is uniformly distributed with micro-grooves (blasting surfaces), and the bottom surface of the light-guiding plate is provided with bright and dark lines and twill marks caused by V-shaped grooves, Therefore, the present invention provides a light guide plate structure that utilizes a microstructure to eliminate bright spots, and includes: a plate body having a light exiting surface, at least one light incident surface adjacent to the light exiting surface, and a bottom surface opposite to the light emitting surface; The light surface form number A0101 page 4/15 pages M383750 is distributed with a plurality of micro-grooves, and the periphery of the light-emitting surface has a plastic frame area, and the bottom surface is distributed with a plurality of v-shaped grooves; a plurality of point light sources And being connected to the light-incident surface of the plate body at two and two intervals; and, in the light-emitting surface, a plurality of concave microstructures are disposed at a position in front of any of the plurality of point light sources.
傳統的HOT SPOTS成因為該點光源於光線進入導光 板之板體後折射角為±42. 15°，加上任二顆相鄰該些點光 源間之間距而形成党區、暗區*然而斜紋的成因中*該 底面之V形切槽為一重大的主因，由於該底面V形切槽的 形狀，使得入射至V形切槽的光線，大體上會被反射到 該V形切槽的二邊，而形成斜紋現象，藉由該些内凹之微 結構，而反射該膠框區下方之板體内及暗區的光線，使 得在亮區出光的光線減少，將光線反射到暗區，而同時 降低明暗紋及斜紋等亮點現象。 上述微凹槽係由喷砂構成，其係應用粗造界面增加 光線之出光。The conventional HOT SPOTS is formed because the point light source is refracted by the light entering the plate of the light guide plate by ±42.15°, and the distance between any two adjacent point light sources is formed to form a party area and a dark area. The cause of the V-shaped grooving of the bottom surface is a major cause. Due to the shape of the V-shaped grooving of the bottom surface, the light incident on the V-shaped grooving is substantially reflected to the V-shaped grooving. Edge forming a twill phenomenon, and by reflecting the concave microstructures, reflecting light in the inside and the dark areas below the frame area, so that the light emitted in the bright area is reduced, and the light is reflected to the dark area. At the same time, it reduces the bright spots such as light and dark lines and twill. The above micro-grooves are composed of sand blasting, which uses a rough interface to increase the light output.
上述微結構係由該出光面之膠框區延伸至非該膠框 區，而用以將光線在尚未到達斜紋出光位置前，藉由全 反射機制，先行改變光線行進方向，將光線反射回導光 板内，改變其出光位置。 上述微結構係以25%之數量百分比分佈於該膠框區 内，此係該些微結構較佳之分佈。 上述微結構係往該板體内呈漸縮狀，並呈相對二側 分別朝向該些點光源及遠離該些點光源為漸縮之菱形。 上述微結構係往該板體内呈漸縮狀，並呈朝向該些 點光源為漸縮之三角形。 表單編號A0101 第5頁/共15頁 M383750 上述微結構係呈亂數分佈。 上述微結構係呈多列分佈。 上述微結構係呈矩陣分佈。 可選 配合該板體之尺寸、外型或使用產品之不同 擇任一上述微結構之分佈及外型。 上述點光源係為LED ’具有發光效率佳，省能環保 且價格日益便宜之優點。 【實施方式】 [0004] 首先’請參sa第_圖所*，本創作係為—種利用微 結構消除亮點之導光板構造，包括—板體⑴及複數點 光源（2)，其中： 該板體（1)具有-出光面⑴），鄰接該出光面（ 11)係至少設置-人光面（12)，相對該出光面Π1) 則具有-底面（13)，而該出光面⑴）上係均勻分佈 複數個微凹槽（111)，又該出光面⑴）周緣係具有— 膠框區（112)，而該底面（13)上則分佈複數ν型切槽 (131);該些點光源（2)係呈兩兩相間隔，而連接於 該板體（1)之入光面（11)，且該些點光源可為 LED，而具有發光效率佳’省能環保，且價格日益便宜之 優點；又，係於該出光面（11)上位於任一該些點光源 (2)前方位置處設置複數個内凹之微結構（113)，而 該些微結構（113)係由該出光面（n)之膠框區（112 )延伸至非該膠框區（112)，並且以25%之數量百分比 分佈於該膠框區（112)内，而本實施例該些微結構（ 113)係往該板體（1 )内呈漸縮狀，並呈相對二側分別 表單編號A0101 第6頁/共15頁 M383750 朝向該些點光源（2 )及遠離該些點光源 (2)為漸縮之 菱形[睛配合參閱第二圖]，又該些微結構（113)不限於 本實施例之外形，亦可呈現往該板體（丨）内呈漸縮狀， 並朝向该些點光源（2)為漸縮之三角形[請參閱第三圖] ，或者亦可呈現其他外型，另外，本實施例該些微結構 (113)係呈矩陣分佈[請配合參閱第二圖]，同樣其不限 於本實施例之排列方式，亦可呈現多列分佈[請參閱第四 圖]或亂數分佈[請參閱第五圖]，而該些微結構（113) 之分佈及外型之選用係配合該板體（1 )之尺寸、外型或 使用產品之不同。 又’ ”亥些微凹槽（111)係由噴砂構成，其主要目的 係用於增加光線出光效果，而該些微結構（113)則用以 將光線在尚未到達斜紋出光位置前先行改變行進方向， 而反射回該板體（1)内，改變其出光位置，進而降低明 暗纹及斜紋荨亮點現象至不影響出光之效果。 請參閱附件三，係為本創作之創作人以數值分析模 擬斜紋現象之模擬圖，請參閱附件四及附件五，係為加 入S亥些微結構（1 1 3 )後，分別呈矩陣排列及多列排列時 ，斜紋消除之情形，皆能改善至不影響人眼所接受之範 圍。 【圖式簡單說明】 [0005] 第一圖係為本創作之立體外觀圖。 第二圖係為本創作微結構為菱形並呈矩陣排列之示 意圖。 第二圖係為本創作微結構為三角形並呈矩陣排列之 表單编號A0HJ1 第7頁/共15頁 M383750 示意圖。 第四圖係為本創作微結構為菱形並呈多列排列之示 意圖。 第五圖係為本創作微結構為菱形並呈亂數排列之示 意圖。 附件一係為以數值分析模擬HOT SPOTS現象之模擬 圖。 附件二係為斜紋現象之示意圖。 附件三係為以數值分析模擬斜紋現象之模擬圖。 附件四係為微結構為菱形且呈矩陣排列時，消除斜 紋現象之模擬圖。 附件五係為微結構為菱形且呈多列排列時，消除斜 紋現象之模擬圖。 【主要元件符號說明】 [0006] ( 1 ) 板體 （11) 出光面 (111) 微凹槽 （112) 膠框區 (113) 微結構 （12) 入光面 (13) 底面 （131) V形切槽 (2) 點光源 表單编號A0101 第8頁/共15頁The microstructure is extended from the plastic frame area of the light-emitting surface to the non-frame area, and is used to change the direction of light travel and reflect the light back to the light before the light exits the position of the twill light. Inside the light panel, change its light exit position. The above microstructures are distributed in the frame area by a percentage of 25%, which is a preferred distribution of the microstructures. The microstructures are tapered toward the body of the plate, and are tapered toward the point sources and away from the point sources. The microstructures are tapered toward the plate and are tapered toward the point source. Form No. A0101 Page 5 of 15 M383750 The above microstructures are distributed in random numbers. The above microstructures are distributed in multiple columns. The above microstructures are distributed in a matrix. Optionally, the distribution and appearance of any of the above microstructures may be selected according to the size, appearance or product used of the board. The above point light source has the advantages that the LED ' has good luminous efficiency, is environmentally friendly, and is increasingly cheap. [Embodiment] [0004] First, please refer to sa _ _ _, * This is a kind of light guide plate structure that uses micro-structure to eliminate bright spots, including - plate body (1) and complex point light source (2), wherein: The plate body (1) has a light-emitting surface (1), and at least the human light surface (12) is disposed adjacent to the light-emitting surface (11), and the bottom surface (13) is provided opposite to the light-emitting surface Π1), and the light-emitting surface (1) The upper system uniformly distributes a plurality of micro-grooves (111), and the peripheral surface of the light-emitting surface (1) has a plastic frame region (112), and the bottom surface (13) is distributed with a plurality of ν-type slits (131); The point light source (2) is spaced apart from each other and connected to the light incident surface (11) of the plate body (1), and the point light sources can be LEDs, and have good luminous efficiency, saving energy and environmental protection, and the price The advantage of being cheaper; further, a plurality of concave microstructures (113) are disposed on the light-emitting surface (11) at a position in front of any of the point light sources (2), and the microstructures (113) are The frame area (112) of the light-emitting surface (n) extends to the non-frame area (112), and is distributed in the frame area (112) by a percentage of 25%. In this embodiment, the microstructures (113) are tapered toward the plate body (1), and are opposite to each other in the form of a form number A0101, page 6 / 15 pages, M383750, toward the point light sources (2) and away from each other. The point light source (2) is a tapered diamond shape (the eye is matched with the second figure), and the microstructures (113) are not limited to the shape of the embodiment, and may also be tapered toward the board body (丨). Shape, and toward the point light source (2) is a tapered triangle [see the third figure], or can also present other appearances, in addition, the microstructures (113) of the present embodiment are distributed in a matrix [please cooperate Referring to the second figure], the same is not limited to the arrangement of the embodiment, and may also exhibit a multi-column distribution [see the fourth figure] or a random number distribution [please refer to the fifth figure], and the microstructures (113) The distribution and appearance are chosen to match the size, appearance or product of the board (1). Moreover, the micro-grooves (111) are made of sandblasting, the main purpose of which is to increase the light-emitting effect, and the microstructures (113) are used to change the direction of travel before the light has reached the position of the twill-out light. It is reflected back into the plate body (1), and its light-emitting position is changed, thereby reducing the phenomenon of light and dark lines and twill-like highlights without affecting the light-emitting effect. Please refer to Annex III for the creator of this creation to simulate the twill phenomenon by numerical analysis. For the simulation diagram, please refer to Annex IV and Annex V. After adding the microstructures (1 1 3 ) of S Hai, the matrix elimination and multi-column arrangement, the twill elimination can be improved without affecting the human eye. The scope of acceptance [Simplified illustration] [0005] The first picture is a three-dimensional appearance of the creation. The second picture is a schematic diagram of the creation of the microstructures in a diamond shape and arranged in a matrix. The micro-structure is a triangle and arranged in a matrix form number A0HJ1 page 7 / a total of 15 pages M383750 schematic diagram. The fourth picture is a schematic diagram of the creation of the microstructure is a diamond shape and arranged in multiple columns. The figure is a schematic diagram of the creation of the microstructures in a diamond shape and arranged in random numbers. Attachment 1 is a simulation diagram simulating the HOT SPOTS phenomenon by numerical analysis. Annex 2 is a schematic diagram of the twill phenomenon. Annex III is a numerical analysis to simulate the twill. The simulation diagram of the phenomenon. Annex 4 is a simulation diagram for eliminating the twill phenomenon when the microstructure is rhombic and arranged in a matrix. Annex 5 is a simulation diagram for eliminating the twill phenomenon when the microstructure is rhombic and arranged in multiple columns. Component Symbol Description [0006] (1) Plate (11) Light-emitting surface (111) Micro-groove (112) Plastic frame area (113) Microstructure (12) Light-in surface (13) Bottom surface (131) V-cut Slot (2) Point source form number A0101 Page 8 of 15