TW201944136A - Optical plate, optical structure, backlight module and display device with protrusions - Google Patents

Optical plate, optical structure, backlight module and display device with protrusions

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Publication number
TW201944136A
TW201944136A TW108113230A TW108113230A TW201944136A TW 201944136 A TW201944136 A TW 201944136A TW 108113230 A TW108113230 A TW 108113230A TW 108113230 A TW108113230 A TW 108113230A TW 201944136 A TW201944136 A TW 201944136A
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TW
Taiwan
Prior art keywords
protrusions
optical plate
optical
patent application
scope
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TW108113230A
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Chinese (zh)
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TWI702443B (en
Inventor
陳信宏
曾煒展
王崇豪
Original Assignee
奇美實業股份有限公司
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Application filed by 奇美實業股份有限公司 filed Critical 奇美實業股份有限公司
Priority to US16/387,658 priority Critical patent/US11106086B2/en
Priority to JP2019080396A priority patent/JP6975197B2/en
Priority to KR1020190046546A priority patent/KR102235161B1/en
Publication of TW201944136A publication Critical patent/TW201944136A/en
Application granted granted Critical
Publication of TWI702443B publication Critical patent/TWI702443B/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0215Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278Diffusing elements; Afocal elements characterized by the use used in transmission
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)

Abstract

An optical plate, an optical structure, a backlight module and a display device with protrusions are provided. The optical plate includes a main body having a first surface, and several protrusions formed on and projected from the first surface of the main body. An area ratio of the protrusions to the first surface is 0.03%~35%. A pitch of the protrusions is in a range of 0.5 mm to 10 mm, and a portion of the first surface outside the protrusions has a mean roughness Ra in a range of 0.01 [mu]m to 0.1 [mu]m.

Description

具有突起部之光學板、光學結構、背光模組及顯示裝置Optical plate with protruding portion, optical structure, backlight module and display device

本發明是有關於一種具有光學板、光學結構、背光模組及顯示裝置,且特別是有關於可作為擴散板的一種具有突起部之光學板、光學結構、背光模組及顯示裝置。The present invention relates to an optical plate with an optical plate, an optical structure, a backlight module, and a display device, and more particularly to an optical plate with a protruding portion that can be used as a diffuser plate, an optical structure, a backlight module, and a display device.

擴散板是應用於電子產品如顯示裝置的一種光學板,其主要作用是將光源的光線擴散霧化,使產品螢幕呈現亮度均勻之畫質。而不同電子產品對於螢幕畫質需求不同,因此擴散板製造廠商製造擴散板時,會依下游廠商之需求而製造出具有不同的光穿透度的擴散板。以應用於顯示裝置(如液晶顯示裝置)之側向式背光模組為例,一般係包括由透光性材料形成的導光板、設置在導光板側面端部之光源(例如冷陰極管形成的線光源)、位於導光板與線光源下方之光反射膜、以及配置在導光板上面形成發光面之擴散板和/或鏡片膜(lens film)。A diffusion plate is an optical plate used in electronic products such as display devices. Its main function is to diffuse and atomize the light from the light source, so that the screen of the product exhibits uniform brightness and quality. Different electronic products have different requirements for the screen image quality. Therefore, when a diffuser plate manufacturer manufactures a diffuser plate, it will manufacture diffuser plates with different light penetrations according to the needs of downstream manufacturers. Taking a side-type backlight module applied to a display device (such as a liquid crystal display device) as an example, it generally includes a light guide plate formed of a light-transmitting material, and a light source (such as a cold cathode tube) provided at the side end of the light guide plate. (Line light source), a light reflection film located under the light guide plate and the line light source, and a diffusion plate and / or a lens film disposed on the light guide plate to form a light emitting surface.

為了提高輝度及降低消耗電力,近年來在彩色液晶顯示裝置中,大多會特別於擴散板的上面或擴散板與導光板之間配置1片或2片表面具有稜鏡形狀的鏡片膜,使從導光板射出之光有效率地聚光在液晶面板的正面方向上。又,為了改善因與光源間的距離所引起的發光量不均,亦有技術是於導光板裏面印刷由光擴散油墨形成會隨著遠離光源而變大之點狀圖案,但擴散板之配置係以使光均一地擴散且使印刷在導光板裡面的點狀圖案不被看見為主要目的。以往該等鏡片膜之製造係透過熱可塑性樹脂板之壓紋加工或使用放射線硬化型樹脂之稜鏡形狀的轉寫等方法達成。但這些現有鏡片膜製造成本高且被視為構成背光模組價格昂貴之主因,此外,現有的鏡片膜亦因受限於其製造方法而使得材質選擇範圍過於狹窄。再者,鏡片膜亦有因不具光擴散效果而必須與光擴散膜組合使用,造成背光模組的組裝步驟繁複之問題。In order to improve brightness and reduce power consumption, in recent years, in color liquid crystal display devices, one or two lens films having a 稜鏡 -shaped surface are particularly arranged on the upper surface of the diffuser plate or between the diffuser plate and the light guide plate. The light emitted from the light guide plate is efficiently focused in the front direction of the liquid crystal panel. In addition, in order to improve the uneven amount of light caused by the distance from the light source, there is also a technique in which a dot-like pattern formed by light diffusion ink is formed on the light guide plate and becomes larger as it moves away from the light source. The main purpose is to uniformly diffuse the light and prevent the dot pattern printed on the light guide plate from being seen. In the past, the production of these lens films was achieved by embossing of a thermoplastic resin plate or transfer of the shape of a cymbal using a radiation-hardening resin. However, these existing lens films are high in manufacturing cost and are considered to be the main reason for the high price of the backlight module. In addition, the existing lens films are also limited in their material selection range due to their limited manufacturing methods. In addition, the lens film also has to be used in combination with the light diffusing film because it does not have a light diffusing effect, resulting in a complicated assembly step of the backlight module.

另外,除了上述於顯示裝置中於擴散板之外還可能使用到的多種機能性膜如擴散膜、鏡片膜、輝度提高膜,以提高顯示畫面的輝度及減少畫面全體的輝度不均,為了達到顯示裝置輕薄化和降低成本等目的,目前也有許多研究是專注於開發出整合多種功能之光學板,例如整合擴散板之光擴散效果以及增亮膜之集光效果成一光學板的開發研究。特別是近來由於顯示裝置(如液晶電視)從小型進展到大型化,更希望能開發出可以減少所使用的機能性膜數量但又可提高輝度與擴散性能之光學擴散板。In addition, various functional films such as diffusion films, lens films, and brightness enhancement films that may be used in addition to the above-mentioned diffusion plates in display devices are used to increase the brightness of the display screen and reduce the uneven brightness of the entire screen. For the purpose of thinning and reducing the display device and reducing the cost, there are also many studies focusing on the development of an optical plate that integrates multiple functions, such as the integration of the light diffusion effect of a diffuser plate and the light collection effect of a brightness enhancement film into an optical plate. In particular, as display devices (such as liquid crystal televisions) have recently progressed from small to large, it is more desirable to develop an optical diffusion plate that can reduce the number of functional films used but can improve brightness and diffusion performance.

本發明係有關於一種光學板(optical plate)、光學結構、背光模組及顯示裝置,其具有特殊設計之突起部,可使應用做為擴散板時,能提高輝度均齊度(uniformity of luminance)。The invention relates to an optical plate, an optical structure, a backlight module, and a display device. The protrusions have a specially designed protrusion, which can improve the uniformity of luminance when used as a diffusion plate. ).

根據本發明,係提出一種光學板,包括:一本體,具有一第一表面;以及複數個突起部,位於第一表面上並突出於第一表面,突起部於第一表面的所佔比例為0.03%~35%,突起部之間係具有一間距(pitch)為0.5mm ~ 10mm,且第一表面於突起部以外的部份係具有一第一中心線平均粗糙度Ra為0.01µm~0.1µm。According to the present invention, an optical plate is provided, comprising: a body having a first surface; and a plurality of protrusions located on the first surface and protruding from the first surface. The proportion of the protrusions on the first surface is: 0.03% ~ 35%, there is a pitch between the protrusions of 0.5mm ~ 10mm, and the part of the first surface outside the protrusions has a first centerline average roughness Ra of 0.01µm ~ 0.1 µm.

本發明提供一種光學結構,包括前述實施例之光學板、一光學膜設置於本體之第一表面之上方、以及一膠體層設置於光學板與光學膜之間,其中膠體層係黏合該些突起部之頂面,且第一表面與膠體層之間具有一空氣層。The present invention provides an optical structure including the optical plate of the foregoing embodiment, an optical film disposed above the first surface of the body, and a colloidal layer disposed between the optical plate and the optical film, wherein the colloidal layer is bonded to the protrusions. An air layer is formed between the first surface and the colloidal layer.

本發明提供一種光學結構,包括前述實施例之光學板、一光學膜及一膠體層。光學板包括一本體及數個突起部。本體具有一第一表面。突起部突出於第一表面,突起部的其中一者具有一外徑為200 µm~500 µm與一最大高度為10 µm~35 µm,兩相鄰的突起部之間具有一間距為0.5 mm~10mm。光學膜設置於本體的第一表面的上方。膠體層設置於光學板與光學膜之間,膠體層黏合突起部的頂面,且第一表面與膠體層之間具有一空氣層。The present invention provides an optical structure including the optical plate, an optical film, and a colloid layer of the foregoing embodiment. The optical plate includes a body and a plurality of protruding portions. The body has a first surface. The protrusions protrude from the first surface. One of the protrusions has an outer diameter of 200 µm ~ 500 µm and a maximum height of 10 µm ~ 35 µm. A distance between two adjacent protrusions is 0.5 mm ~ 10mm. The optical film is disposed above the first surface of the body. The colloid layer is disposed between the optical plate and the optical film. The colloid layer adheres to the top surface of the protrusion, and an air layer is provided between the first surface and the colloid layer.

本發明提供一種背光模組,包括一光源以及前述實施例之光學板或前述實施例之光學結構與光源相對應設置。The present invention provides a backlight module including a light source and the optical plate of the foregoing embodiment or the optical structure of the foregoing embodiment corresponding to the light source.

本發明提供一種顯示裝置,包括具前述實施例之光學板或前述實施例之光學結構的背光模組,其中所述顯示裝置系選自於由電視、筆記本個人電腦、移動電腦與用於電腦的監視器所組成之群組。The present invention provides a display device including the optical plate of the foregoing embodiment or the backlight module of the foregoing embodiment, wherein the display device is selected from the group consisting of a television, a notebook personal computer, a mobile computer, and a computer. A group of monitors.

為了對本發明之上述及其他方面有更佳的瞭解,下文特舉實施例,並配合所附圖式,作詳細說明如下:In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are given below in conjunction with the accompanying drawings to make a detailed description as follows:

本發明之實施例係提出一種光學板(optical plate),可應用於一顯示裝置作為背光模組的擴散板。實施例之光學板係利用在主體表面上形成的突起部(protrusion)及減少表面粗糙度之設計,提高顯示裝置發光區域的輝度均齊度(uniformity of luminance;例如四角均齊度)。因此,根據實施例可提供一具有高擴散性能之擴散板,減少其他傳統所使用的機能性膜數量,進而降低成本並使應用顯示裝置更加輕薄化(特別是大型尺寸之顯示裝置)。應用實施例之光學板作為擴散板時,可令具有突起部的主體表面(e.g.第一表面)朝向背光模組之光源,亦可令主體之一較粗糙的背面(e.g.第二表面)朝向背光模組之光源。An embodiment of the present invention proposes an optical plate, which can be applied to a display device as a diffuser plate of a backlight module. The optical plate of the embodiment uses a protrusion formed on the surface of the main body and a design to reduce the surface roughness to improve the uniformity of luminance (e.g., the uniformity of the four corners) of the light emitting area of the display device. Therefore, according to the embodiment, a diffusion plate with high diffusion performance can be provided, which reduces the number of other functional films traditionally used, thereby reducing costs and making application display devices lighter and thinner (especially large-sized display devices). When the optical plate of the embodiment is used as a diffuser, the surface of the main body (eg, the first surface) with the protruding portion can be directed toward the light source of the backlight module, and one of the rough back surfaces (eg, the second surface) of the main body can be directed toward the backlight Light source of the module.

以下係參照所附圖式詳細敘述實施態樣。需注意的是,實施例所提出的結構和內容僅為舉例說明之用,本發明欲保護之範圍並非僅限於所述之該些態樣。實施例中相同或類似的標號係用以標示相同或類似之部分。需注意的是,本發明並非顯示出所有可能的實施例。可在不脫離本發明之精神和範圍內對結構加以變化與修飾,以符合實際應用所需。因此,未於本發明提出的其他實施態樣也可能可以應用。再者,圖式係已簡化以利清楚說明實施例之內容,圖式上的尺寸比例並非按照實際產品等比例繪製。因此,說明書和圖示內容僅作敘述實施例之用,而非作為限縮本發明保護範圍之用。The embodiments are described in detail below with reference to the drawings. It should be noted that the structures and contents provided in the embodiments are only for illustrative purposes, and the scope of the present invention is not limited to these aspects. The same or similar reference numerals in the embodiments are used to indicate the same or similar parts. It should be noted that the present invention does not show all possible embodiments. Changes and modifications can be made to the structure without departing from the spirit and scope of the invention to meet the needs of practical applications. Therefore, other implementations not proposed in the present invention may also be applicable. Moreover, the drawings have been simplified to clearly explain the content of the embodiments, and the dimensional proportions on the drawings are not drawn according to the actual products. Therefore, the contents of the description and the drawings are only used to describe the embodiments, but not to limit the scope of protection of the present invention.

再者,說明書與請求項中所使用的序數例如“第一”、 “第二”、“第三”等之用詞,是為了修飾請求項之元件,其本身並不意含及代表該請求元件有任何之前的序數,也不代表某一請求元件與另一請求元件的順序、或是製造方法上的順序,該些序數的使用僅用來使具有某命名的一請求元件得以和另一具有相同命名的請求元件能作出清楚區分。再者,說明書與請求項中可能使用的空間相關之用詞,例如“之下”(beneath)、“下方”(below)、“較低的”(lower)、 “上方”(above)、“較高的”(upper) 或類似詞語,是用來便於敘述和參照如圖示所繪製之其中一元素或特徵與另一元素或特徵之間的空間關係。因此具通常知識者可知,該些空間相關之用詞除了包括如圖所示之元件方位,更包括了元件於使用或操作時不同於圖示的方位。因此,說明書與請求項中所使用的該些用詞僅用以敘述實施例之用,而非用以限制本發明保護範圍之用。In addition, the ordinal numbers used in the description and the request items, such as "first", "second", "third", etc., are used to modify the elements of the request, and they do not themselves imply and represent the request elements. Any previous ordinal number does not represent the order of one request element and another request element, or the order of manufacturing methods. The use of these ordinal numbers is only used to enable a request element with a certain name to have another The same named request element makes a clear distinction. Furthermore, the description relates to terms that may be used in the request, such as "beneath", "below", "lower", "above", " "Upper" or similar words are used to facilitate the description and reference to the spatial relationship between one element or feature and another element or feature as drawn in the illustration. Therefore, those with ordinary knowledge can know that in addition to the orientation of the components shown in the figure, these spatially related terms also include the orientation of the components that are different from those shown in use or operation. Therefore, the terms used in the description and the claims are only used to describe the embodiments, but not used to limit the protection scope of the present invention.

第1圖為本發明一實施例之一光學板之局部示意圖。第2A圖為沿著第1圖中一剖面線2-2繪示之一突起部之剖面示意圖。第2B圖為第1圖之單個突起部20的示意圖。請同時參照第1圖和第2A圖。一實施例之光學板1包括一本體(main body)10和複數個突起部(protrusion)20位於本體10之第一表面101上並突出於第一表面101。其中,該些突起部20之間係具有一間距(pitch)Dp為0.5mm~10mm,於此間距範圍內可使光學板維持較高的輝度表現並可避免於運送或組裝過程中因磨擦而導致第一表面101刮傷。於一示例中,該些突起部20之間係具有的間距Dp為0.5mm~9mm;於另一示例中,Dp為0.5mm~8mm。第一表面101於突起部20以外的部份係為光滑表面。一示例中,第一表面101於突起部20以外的部份具有一第一中心線平均粗糙度(mean roughness) Ra,其Ra值例如是為0.01 µm~0.1µm,當Ra值在0.01 µm~0.1µm時可使擴散板具佳之四角均齊度。於一示例中,第一表面101之第一中心線平均粗糙度Ra例如是不超過約0.08µm,亦即約0.08 µm或低於0.08 µm。於另一示例中,第一表面101之十點平均粗糙度(ten-point mean roughness)Rz的範圍為0.1µm~1µm,例如是0.5µm~1µm。於一示例中,本體10與突起部20例如是一體成形。FIG. 1 is a partial schematic diagram of an optical plate according to an embodiment of the present invention. FIG. 2A is a schematic cross-sectional view of a protruding portion shown along a section line 2-2 in FIG. 1. FIG. 2B is a schematic view of a single protruding portion 20 of FIG. 1. Please refer to Figure 1 and Figure 2A at the same time. The optical plate 1 of an embodiment includes a main body 10 and a plurality of protrusions 20 located on the first surface 101 of the main body 10 and protruding from the first surface 101. Among them, there is a pitch Dp between 0.5 mm and 10 mm between the protrusions 20. Within this range, the optical plate can maintain a high brightness performance and can be avoided due to friction during transportation or assembly. As a result, the first surface 101 is scratched. In one example, a distance Dp between the protrusions 20 is 0.5 mm to 9 mm; in another example, Dp is 0.5 mm to 8 mm. The portion of the first surface 101 other than the protruding portion 20 is a smooth surface. In one example, the portion of the first surface 101 outside the protrusion 20 has a first centerline mean roughness Ra. The Ra value is, for example, 0.01 μm to 0.1 μm. When the Ra value is 0.01 μm to At 0.1µm, the four corners of the diffuser can be evenly aligned. In one example, the first centerline average roughness Ra of the first surface 101 is, for example, not more than about 0.08 μm, that is, about 0.08 μm or less than 0.08 μm. In another example, the ten-point mean roughness Rz of the first surface 101 ranges from 0.1 μm to 1 μm, for example, 0.5 μm to 1 μm. In one example, the body 10 and the protruding portion 20 are integrally formed, for example.

一實施例中,突起部20係具有一最大高度Hp於突起部頂點P與第一表面之間,最大高度Hp的範圍在10µm~35µm範圍之間,例如是在12µm~30µm範圍之間,或是在15µm~27µm範圍之間。一示例中,突起部20之最大高度Hp (非限制地)為約19.32µm;另一示例中,突起部20之最大高度Hp (非限制地)為約16.46µm。再者,以單一突起部20為例,突起部20之外徑Dm係定義為與本體10之第一表面101接觸的突起部20之底面的一最大直徑。而上述突起部20之間的間距Dp則定義為該些突起部其中一者之外徑Dm與兩相鄰突起部20之間的最短距離Ds的一總和,即Dp為Dm與Ds之總和。於一實施例中,與第一表面101接觸的突起部20之底面實質上呈圓形,其外徑Dm範圍係為200 µm~500 µm,例如是250µ~450µm,或是270µm~400µm。一示例中,突起部20之外徑(非限制地)為約310.51µm。In one embodiment, the protrusion 20 has a maximum height Hp between the apex P of the protrusion and the first surface, and the range of the maximum height Hp is between 10µm and 35µm, for example, between 12µm and 30µm, or It is in the range of 15µm ~ 27µm. In one example, the maximum height Hp (without limitation) of the protrusion 20 is approximately 19.32 μm; in another example, the maximum height Hp (without limitation) of the protrusion 20 is approximately 16.46 μm. Furthermore, taking a single protrusion 20 as an example, the outer diameter Dm of the protrusion 20 is defined as a maximum diameter of the bottom surface of the protrusion 20 that is in contact with the first surface 101 of the body 10. The distance Dp between the protrusions 20 is defined as the sum of the outer diameter Dm of one of the protrusions and the shortest distance Ds between two adjacent protrusions 20, that is, Dp is the sum of Dm and Ds. In an embodiment, the bottom surface of the protruding portion 20 in contact with the first surface 101 is substantially circular, and the outer diameter Dm thereof ranges from 200 µm to 500 µm, for example, 250 µ to 450 µm, or 270 µm to 400 µm. In one example, the outer diameter of the protrusion 20 (without limitation) is about 310.51 μm.

一實施例中,突起部20的最大高度Hp與外徑Dm的比值Hp/Dm範圍為0.01~0.2,例如是在0.01~0.18範圍之間,或是在0.02~0.175範圍之間。一示例中,突起部20之Hp/Dm的比值(非限制地)為約0.062;另一示例中,突起部20之Hp/Dm的比值(非限制地)為約0.053。In one embodiment, the ratio Hp / Dm of the maximum height Hp of the protruding portion 20 to the outer diameter Dm ranges from 0.01 to 0.2, for example, from 0.01 to 0.18, or from 0.02 to 0.175. In one example, the ratio of Hp / Dm of the protrusion 20 (non-limitingly) is about 0.062; in another example, the ratio of Hp / Dm of the protrusion 20 (non-limitingly) is about 0.053.

另外,實施例中,一突起部20之表面係與本體10之第一表面101形成一傾斜角α。如第2A圖所示,一突起部20的底部最外緣與突起部頂點P之間係形成一傾斜角α,其在2度~10度範圍之間,例如是2.5度~9度,或是3度~7.5度。一示例中,突起部20之傾斜角(非限制地)為約5.2度。In addition, in the embodiment, the surface of a protrusion 20 forms an inclination angle α with the first surface 101 of the body 10. As shown in FIG. 2A, an inclination angle α is formed between the outermost edge of the bottom of the protrusion 20 and the apex P of the protrusion, which is in the range of 2 to 10 degrees, for example, 2.5 to 9 degrees, or It is 3 degrees to 7.5 degrees. In one example, the inclination angle (without limitation) of the protrusion 20 is about 5.2 degrees.

一實施例中,突起部20之突起表面201具有曲面。如第1圖所示,突起部20為凸塊(bumps),其外型可能是球體的某一部分。因此,於一實施例中,突起部20於第一表面101上的投影為圓形,突起部20具有一曲率半徑於300µm至1000µm之間的曲面,例如是400µm至900µm,或是450µm至850µm。一示例中,突起部20之一曲率半徑(非限制地)為約640µm。In one embodiment, the protruding surface 201 of the protruding portion 20 has a curved surface. As shown in FIG. 1, the protruding portion 20 is a bump, and its shape may be a part of a sphere. Therefore, in an embodiment, the projection of the protrusion 20 on the first surface 101 is circular, and the protrusion 20 has a curved surface with a curvature radius between 300µm and 1000µm, for example, 400µm to 900µm, or 450µm to 850µm. . In one example, one of the protrusions 20 has a radius of curvature (without limitation) of about 640 μm.

如第2B圖所示,本實施例之突起部20為球體的一部分,突起部20於第一表面101 (未繪示於第2B圖)上的投影呈圓形。突起表面201包含一曲面,曲面頂端處為突起部頂點P,傾斜角α為突起部頂點P與第一表面101的夾角,如所夾的銳角。然本發明實施例並不限定突起部20為球體的一部分,其可具有其它類型的幾何型態,以下係以第3A~7B圖進一步舉例說明。As shown in FIG. 2B, the projection 20 of this embodiment is a part of a sphere, and the projection of the projection 20 on the first surface 101 (not shown in FIG. 2B) is circular. The protruding surface 201 includes a curved surface. The top end of the curved surface is the apex of the protruding portion P, and the inclination angle α is the angle between the protruding portion apex P and the first surface 101, such as an acute angle. However, the embodiment of the present invention does not limit the protruding portion 20 to be a part of a sphere, and it may have other types of geometrical forms, which are further illustrated below with reference to FIGS. 3A to 7B.

第3A~3D圖繪製突起表面201為曲面的其他示例。請先參照第3A~3B圖,突起部20於第一表面101 (未繪示於第3A~3B圖)上的投影呈弧形,突起表面201包含一曲面與一斜面,曲面與斜面相接且兩者相接最高處為突起部頂點P,傾斜角α則為斜面與第一表面101的夾角,如所夾的銳角。請參照第3C~3D圖,繪示突起表面201為二曲面相接之示例,於第3C圖中,突起表面201包含兩相接的曲面,相接最高處為突起部頂點P,傾斜角α則為突起部頂點P與第一表面101的夾角。第3D圖則繪示除兩曲面相接外,另包含一斜面之示例。例如,第3D圖共包含三個表面,第3D圖中傾斜角α為斜面與第一表面101的夾角。In FIGS. 3A to 3D, other examples in which the protruding surface 201 is a curved surface are drawn. Please refer to FIGS. 3A to 3B. The projection of the protrusion 20 on the first surface 101 (not shown in FIGS. 3A to 3B) is arc-shaped. The protrusion surface 201 includes a curved surface and an inclined surface, and the curved surface and the inclined surface are connected. And the highest point where the two meet is the apex P of the protrusion, and the inclination angle α is the angle between the inclined surface and the first surface 101, such as the acute angle between the two. Please refer to FIGS. 3C to 3D, which shows an example where the protruding surface 201 is a curved surface. In FIG. 3C, the protruding surface 201 includes two curved surfaces. The angle between the apex P of the protrusion and the first surface 101. Figure 3D shows an example that includes two inclined surfaces in addition to the two curved surfaces. For example, the 3D image includes a total of three surfaces, and the inclination angle α in the 3D image is an angle between the inclined surface and the first surface 101.

在一實施例中,突起部20包含曲面,傾斜角α為突起部頂點P與第一表面101的夾角;另一實施例中,突起部20包含斜面,傾斜角α為斜面與第一表面101的夾角。In one embodiment, the protrusion 20 includes a curved surface, and the inclination angle α is an included angle between the apex P of the protrusion and the first surface 101. In another embodiment, the protrusion 20 includes an inclined surface, and the inclination angle α is an inclined surface and the first surface 101. Angle.

一實施例中,如第4A~4C圖所示,突起部20為錐狀凸塊,突起部頂點P位於錐狀尖點。請先參照第4A圖,突起部20於第一表面101上的投影為圓形,突起表面201具有曲面。請參照第4B圖及第4C圖,突起部20於第一表面101上的投影可為多邊形,例如是第4B圖所示的四邊形,如正方形或矩形,或是第4C圖所示的三角形。如第4B~4C圖所示,於一實施例中,突起表面201由多個斜面組成,而呈金字塔或三角塔狀,傾斜角α為構成突起表面201的斜面與第一表面101的夾角。於另一實施例中,突起表面201可以由多個曲面組成,傾斜角α形成於突起部頂點P與第一表面101間。In an embodiment, as shown in FIGS. 4A to 4C, the protruding portion 20 is a tapered bump, and the vertex P of the protruding portion is located at the tapered sharp point. Please refer to FIG. 4A first, the projection of the protruding portion 20 on the first surface 101 is circular, and the protruding surface 201 has a curved surface. Please refer to FIG. 4B and FIG. 4C. The projection of the protrusion 20 on the first surface 101 may be a polygon, such as a quadrilateral as shown in FIG. 4B, such as a square or a rectangle, or a triangle as shown in FIG. 4C. As shown in FIGS. 4B to 4C, in one embodiment, the protruding surface 201 is composed of a plurality of inclined surfaces, and has a pyramid or triangular tower shape. In another embodiment, the protruding surface 201 may be composed of multiple curved surfaces, and the inclination angle α is formed between the vertex P of the protruding portion and the first surface 101.

一實施例中,突起部20於本體10的第一表面101上的投影,即突起部20與本體10的第一表面101接觸的突起部20底面,呈規則形狀,例如是第4A~4C圖所示的圓形、方形、三角形或是其他多邊形等,該規則形狀的面積與周長平方的比值範圍(即面積/周長2 )為0.03~0.08,例如是0.039(三角形)~0.0796(圓形)。In an embodiment, the projection of the protruding portion 20 on the first surface 101 of the body 10, that is, the bottom surface of the protruding portion 20 that the protruding portion 20 contacts the first surface 101 of the body 10 has a regular shape, for example, FIGS. 4A to 4C. The circle, square, triangle, or other polygon shown, the ratio of the area of the regular shape to the square of the perimeter (that is, area / perimeter 2 ) is 0.03 ~ 0.08, for example, 0.039 (triangle) ~ 0.0796 (circle) shape).

一實施例中,請參照第5A~5C圖,突起部20為突起平台,可包含一頂面20u,頂面20u為一平面,突起部頂點P則為頂面20u中任一點。In an embodiment, please refer to FIGS. 5A to 5C. The protruding portion 20 is a protruding platform, which may include a top surface 20u, the top surface 20u is a plane, and the vertex P of the protruding portion is any point of the top surface 20u.

一實施例中,突起部20包含一凹陷部20R,凹陷部20R形成於突起部20的中心位置,即可視為自突起部20頂端向下凹陷而形成。凹陷部20R的底部為凹點20R1或平面20R2,因此頂點P形成於凹陷部20R周圍,即凹陷部20R形成於至少兩頂點P之間。如第6A~6B圖所示,突起部20具有一凹點20R1於兩頂點P間,頂點P與凹點20R1的距離為突起部20的下凹深度HD 。一實施例中,突起部20的下凹深度HD 與最大高度Hp的比例((HD /Hp)⨯100%)可介於15%~100%之間,例如是30%~100%或是50%~90%。如第6C圖所示,凹陷部20R的底部為一平面20R2,凹陷部20R周圍可有多個頂點P,於此實施例中,多個頂點P環繞排列成環形。於一實施例中,如第6C圖所示,平面20R2相對本體10的第一表面101(未繪示於第6C圖)係突出。於另一實施例中,平面20R2可與第一表面101共平面。如第6D圖所示,其繪示第6C 圖沿6D-6D’的剖視圖,於此實施例中,突起表面201為曲面,突起部頂點P則落在曲面最高處,環形結構的突起部具有多個突起部頂點P,此些突起部頂點P排列成環形結構,平面20R2相對本體10的第一表面101係突出。如第6E圖所示,其繪示第6C圖沿6D-6D’剖視圖的另一示意,與第6D圖不同之處在於,第6E圖的突起表面201為斜面。於一實施例中,凹陷部20R可與第一表面101(第6D圖以虛線繪製)相接,此時,突起部20形成一環形結構,即凹陷部20R的平面20R2與第一表面101共平面,下凹深度HD 與最大高度Hp兩者相同。請參照第6F圖至第6H圖,繪示凹陷部20R與第一表面101 (未繪示於第6F圖至第6H圖)相接或共平面之示意圖,一實施例中,如第6F圖與第6G圖所示突起部20呈圓環形;另一實施例中,突起部20可以是多邊形環形,如第6H圖所示的四角環形。請參照第6I圖,其繪示第6F圖沿6I-6I’的剖視圖,於此實施例中,突起表面201為曲面,突起部頂點P為曲面最高處,環形結構的突起部20具有多個突起部頂點P,此些突起部頂點P排列成環形結構。請再參照第6J圖,繪示第6F圖沿6I-6I’剖視圖的另一示意,與第6I圖不同之處在於,第6J圖的突起表面201為斜面。請參照第6K圖,其繪示第6G圖沿6K-6K’剖視圖的一示意,於此實施例中,凹陷部20R之凹點20R1且與第一表面101相接。In one embodiment, the protruding portion 20 includes a recessed portion 20R. The recessed portion 20R is formed at a center position of the protruding portion 20, that is, it can be regarded as being formed by being recessed downward from the top of the protruding portion 20. The bottom of the recessed portion 20R is a recessed point 20R1 or a flat surface 20R2. Therefore, the vertex P is formed around the recessed portion 20R, that is, the recessed portion 20R is formed between at least two vertices P. As shown in FIGS. 6A to 6B, the protruding portion 20 has a concave point 20R1 between two vertexes P, and the distance between the vertex P and the concave point 20R1 is the recessed depth H D of the protruding portion 20. In one embodiment, the ratio of the protrusion 20 is recessed a depth D and a maximum H height Hp is ((H D / Hp) ⨯100 %) may be 15% to 100% range, for example, 30% to 100%, or It is 50% ~ 90%. As shown in FIG. 6C, the bottom of the recessed portion 20R is a plane 20R2, and there may be a plurality of vertices P around the recessed portion 20R. In this embodiment, the plurality of vertices P are arranged in a circle. In an embodiment, as shown in FIG. 6C, the plane 20R2 is protruded from the first surface 101 (not shown in FIG. 6C) of the body 10. In another embodiment, the plane 20R2 may be coplanar with the first surface 101. As shown in FIG. 6D, it is a cross-sectional view taken along line 6D-6D 'in FIG. 6C. In this embodiment, the protruding surface 201 is a curved surface, and the vertex P of the protruding portion falls on the highest point of the curved surface. The protruding portion of the ring structure has A plurality of protrusion apexes P are arranged in a ring structure, and the plane 20R2 protrudes from the first surface 101 of the body 10. As shown in FIG. 6E, it illustrates another schematic view of the cross-sectional view of FIG. 6C along 6D-6D '. The difference from FIG. 6D is that the protruding surface 201 of FIG. 6E is an inclined surface. In an embodiment, the recessed portion 20R may be connected to the first surface 101 (drawn in dashed lines in FIG. 6D). At this time, the protruding portion 20 forms a ring structure, that is, the plane 20R2 of the recessed portion 20R is in common with the first surface 101. flat, concave depth H D with the same maximum height Hp of both. Please refer to FIG. 6F to FIG. 6H, which are schematic diagrams where the recessed portion 20R is in contact with or coplanar with the first surface 101 (not shown in FIGS. 6F to 6H). In one embodiment, as shown in FIG. 6F The protruding portion 20 shown in FIG. 6G has a circular ring shape. In another embodiment, the protruding portion 20 may have a polygonal ring shape, such as a four-corner ring shape shown in FIG. 6H. Please refer to FIG. 6I, which is a cross-sectional view taken along line 6I-6I 'in FIG. 6F. In this embodiment, the protruding surface 201 is a curved surface, the protruding point vertex P is the highest point of the curved surface, and the protruding portion 20 of the ring structure has a plurality of The apexes P of the protrusions are arranged in a ring structure. Please refer to FIG. 6J again, showing another schematic view of the sectional view taken along the line 6I-6I ′ in FIG. 6F. The difference from FIG. 6I is that the protruding surface 201 in FIG. 6J is an inclined surface. Please refer to FIG. 6K, which shows a schematic view taken along the 6K-6K ′ cross-section of FIG. 6G. In this embodiment, the pit 20R1 of the recessed portion 20R is in contact with the first surface 101.

一實施例中,突起部20可以是具有階梯狀之「凸」狀結構,如第7A及7B圖所示,其可為一體成形或是2個具不同尺寸之上述結構透過堆疊而形成結構,例如是堆疊不同尺寸之第5A~5C圖與第2B圖的結構。In one embodiment, the protruding portion 20 may have a stepped "convex" structure, as shown in Figs. 7A and 7B, which may be integrally formed or formed by stacking two structures having different sizes through stacking, For example, it is a structure in which FIGS. 5A to 5C and FIG. 2B with different sizes are stacked.

在一實施例中,突起部20之突起表面201係為平滑的表面,例如是平滑曲面。當然,上述之突起部20之尺寸、傾斜角和曲率半徑可視實際應用時之需求和設計而有所變化與調整,並不侷限於上述數值,因此本發明對此並不多作限制。於一示例中,各個突起部20彼此之間的尺寸、傾斜角和曲率半徑係大致相同,且具有規則的形狀;當然,亦可能因為製程變異而略有些微的不同,只要在本發明保護範圍內,皆屬本發明之特徵。In one embodiment, the protruding surface 201 of the protruding portion 20 is a smooth surface, such as a smooth curved surface. Of course, the size, inclination angle, and curvature radius of the above-mentioned protruding portion 20 can be changed and adjusted according to the requirements and design of the actual application, and are not limited to the above-mentioned values. Therefore, the present invention does not limit this. In an example, the sizes, inclination angles, and curvature radii of each protrusion 20 are substantially the same and have a regular shape; of course, it may be slightly different due to process variations, as long as it is within the scope of the present invention. All are features of the present invention.

另外,光學板1的厚度為本體10之厚度Hm加上突起部20的高度Hp,當應用本發明之光學板1做為背光模組用之擴散板時,光學板1的厚度為0.5mm~6mm時為佳。厚度超過6mm可能會因厚度過厚和重量過重而不宜用於現今追求輕薄化之顯示裝置內,厚度比0.5mm薄時可能會因為剛性不足而影響應用時之擴散效果。於一實施例中,光學板1的厚度為0.6mm~5mm (600µm~5000µm)範圍之間;另一實施例中,光學板1的厚度為0.8mm~3mm。另一實施例中,光學板1的厚度為0.8mm~2.5mm。而由於突起部20之高度Hp相較於本體10之厚度Hm甚微,因此光學板1之厚度(即本體厚度Hm加上突起部20的高度Hp)可視為近似或等於本體10之厚度Hm。In addition, the thickness of the optical plate 1 is the thickness Hm of the main body 10 plus the height Hp of the protrusion 20. When the optical plate 1 of the present invention is used as a diffusion plate for a backlight module, the thickness of the optical plate 1 is 0.5 mm ~ It is better at 6mm. Thickness exceeding 6mm may be unsuitable for today's thin and light display devices due to excessive thickness and weight. When the thickness is thinner than 0.5mm, it may affect the diffusion effect during application due to insufficient rigidity. In one embodiment, the thickness of the optical plate 1 ranges from 0.6 mm to 5 mm (600 μm to 5000 μm); in another embodiment, the thickness of the optical plate 1 is 0.8 mm to 3 mm. In another embodiment, the thickness of the optical plate 1 is 0.8 mm to 2.5 mm. Since the height Hp of the protrusion 20 is relatively small compared to the thickness Hm of the body 10, the thickness of the optical plate 1 (ie, the thickness Hm of the body plus the height Hp of the protrusion 20) can be regarded as being approximately equal to or equal to the thickness Hm of the body 10.

第8圖係繪製依據本發明一實施例之光學板之主體上分佈有多個突起部之示意圖。一實施例中,多個突起部20例如是可均勻地(有規則地)排列並分佈於本體10之第一表面101上。如第8圖所示,位於上下排的突起部20係錯位排列。而此示例中,如圖中圈選放大部分可視為突起部20排列之一個重複單元,且一個重複單元係包括位於四個角落的各1/4顆突起部20-1、20-2、20-3、20-4以及位於中央的1顆突起部20-5,加總後共2顆突起部20。而此單一個重複單元中的突起部排列方式類似於晶格中的面心立方排列。一實施例中,規則排列的突起部占全部突起部的比例為90%以上,例如是95%以上,即重複單元的重複比例高達9成以上。FIG. 8 is a schematic diagram of a plurality of protrusions distributed on a main body of an optical plate according to an embodiment of the present invention. In one embodiment, the plurality of protrusions 20 may be evenly (regularly) arranged and distributed on the first surface 101 of the body 10. As shown in FIG. 8, the protrusions 20 located in the upper and lower rows are arranged in an offset manner. In this example, as shown in the figure, the enlarged part can be regarded as a repeating unit of the protrusions 20, and a repeating unit includes 1/4 protrusions 20-1, 20-2, 20 located at four corners. -3, 20-4, and one protrusion 20-5 located in the center, and a total of two protrusions 20 are added up. The arrangement of the protrusions in this single repeating unit is similar to the face-centered cubic arrangement in the crystal lattice. In one embodiment, the ratio of the regularly arranged protrusions to all the protrusions is 90% or more, for example, 95% or more, that is, the repeating ratio of the repeating unit is as high as 90% or more.

於一實施例中,突起部20相對於本體10之第一表面101的所佔比例為0.03%~35%,例如是0.07%~32%。一示例中,突起部20之一所佔比例(非限制地)為約0.30%。另一示例中,突起部20之一所佔比例(非限制地)為約1.21%。另一示例中,突起部20之一所佔比例(非限制地)為約4.83%突起部20相對於本體10之第一表面101的所佔比例可透過如第8圖所示之分佈而計算,例如,可根據2顆突起部20之所佔面積除以一個重複單元之面積而計算出突起部的占比(所佔比例,又可稱為突起部之分佈密度)。In one embodiment, the proportion of the protruding portion 20 relative to the first surface 101 of the body 10 is 0.03% to 35%, for example, 0.07% to 32%. In one example, the proportion of one of the protrusions 20 (without limitation) is about 0.30%. In another example, the proportion (non-limiting) of one of the protrusions 20 is about 1.21%. In another example, the proportion of one of the protrusions 20 (without limitation) is about 4.83%. The proportion of the protrusions 20 relative to the first surface 101 of the body 10 can be calculated through the distribution shown in FIG. 8. For example, the proportion of the protrusions (the proportion of the protrusions 20 can also be referred to as the distribution density of the protrusions) can be calculated based on the area occupied by the two protrusions 20 divided by the area of one repeating unit.

以單一顆突起部之外徑Dm為310µm(半徑近似於155µm)而突起部20之間的間距Dp為5000µm(i.e. 5mm)為例,則一個重複單元之面積=2×50002 ,突起部之面積π×1552 =75477µm2 而突起部的占比為:
(2×75477)÷(2×50002 )=0.30%。
Taking the outer diameter Dm of a single protrusion as 310µm (radius approximately 155µm) and the distance Dp between the protrusions 20 as 5000µm (ie 5mm) as an example, the area of a repeating unit = 2 × 5000 2 . Area π × 155 2 = 75477µm 2 and the proportion of the protrusions is:
(2 × 75477) ÷ (2 × 5000 2 ) = 0.30%.

以單一顆突起部之外徑Dm為310µm(半徑近似於155µm)而突起部20之間的間距Dp為2500µm(i.e. 2.5mm)為例,則一個重複單元之面積=2×25002 ,而突起部的占比為:
(2×75477)÷(2×25002 )=1.21%。
Taking the outer diameter Dm of a single protrusion as 310µm (radius approximately 155µm) and the distance Dp between the protrusions 20 as 2500µm (ie 2.5mm) as an example, the area of a repeating unit = 2 × 2500 2 and the protrusion The proportion of the ministry is:
(2 × 75477) ÷ (2 × 2500 2 ) = 1.21%.

以單一顆突起部之外徑Dm為310µm(半徑近似於155µm)而突起部20之間的間距Dp為1250µm(i.e. 1.25mm)為例,則一個重複單元之面積=2×25002 ,而突起部的占比為:
(2×75477)÷(2×12502 )=4.83%。
Taking the outer diameter Dm of a single protrusion as 310µm (radius approximately 155µm) and the distance Dp between the protrusions 20 as 1250µm (ie 1.25mm) as an example, the area of a repeating unit = 2 × 2500 2 and the protrusion The proportion of the ministry is:
(2 × 75477) ÷ (2 × 1250 2 ) = 4.83%.

於一實施例中,突起部20以外的第一表面101的所佔比例為65%~99.97%,例如是68%~99.93%。In one embodiment, the proportion of the first surface 101 other than the protruding portion 20 is 65% to 99.97%, for example, 68% to 99.93%.

相較於現有擴散板之微結構,本案實施例因具有較大尺寸的突起部20,例如單一突起部20之外徑Dm (底面最大特徵尺寸例如直徑)的範圍係為200 µm~500 µm,且間距達到0.5mm (=500µm)~10mm(=10000µm);而現有擴散板之單一微結構例如為數µm至30µm左右,且間距僅有幾µm至300µm以下。因此,相較於現有擴散板之微結構尺寸小且分佈密,實施例之光學板的突起部20尺寸更大且分佈更疏鬆。搭配此種較大尺寸並分佈疏鬆的突起部20、並控制第一表面101之粗糙度,可藉此增加光線反射率,進而提升輝度均齊度。此外,於此設計下,即便使突起部20具如第1圖所示之規則排列,於應用實施例之光學板作為背光模組之擴散板時,仍可減少甚至避免莫爾(moire)干涉條紋的產生。Compared with the microstructure of the existing diffuser plate, the embodiment of the present embodiment has a larger size of the protrusions 20, for example, the outer diameter Dm (the largest characteristic dimension of the bottom surface, such as the diameter) of the single protrusion 20 ranges from 200 µm to 500 µm. And the pitch reaches 0.5mm (= 500µm) to 10mm (= 10000µm); and the single microstructure of the existing diffuser plate is, for example, several µm to 30µm, and the pitch is only a few µm to 300µm or less. Therefore, compared with the existing micro-structures, the size and distribution of the micro-structures are smaller, the protrusions 20 of the optical plate of the embodiment are larger in size and more loosely distributed. With such large-sized and loosely distributed protrusions 20 and controlling the roughness of the first surface 101, the light reflectance can be increased, and the uniformity of brightness can be improved. In addition, under this design, even if the protrusions 20 are arranged regularly as shown in Fig. 1, when the optical plate of the embodiment is used as a diffuser plate of a backlight module, moire interference can be reduced or even avoided. Generation of streaks.

再者,根據本發明之實施例,光學板1的本體10其上下兩個表面係具有不同粗糙度。一實施例中,本體10之第一表面101是一光滑表面,而本體10之與第一表面101相對的一第二表面102可為一粗糙表面。亦即,第二表面102所具有之第二表面粗糙度大於第一表面101於突起部20以外的部份所具有之第一表面粗糙度。於一示例中,第二中心線平均粗糙度Ra例如為3µm ~ 7 µm。於一示例中,第二表面102所具有之十點平均粗糙度Rz例如為20µm~35 µm。應用於一背光模組時,可令第一表面101為入光面,第二表面102為出光面;亦可令第二表面102為入光面,第一表面101為出光面。Furthermore, according to the embodiment of the present invention, the upper and lower surfaces of the body 10 of the optical plate 1 have different roughnesses. In one embodiment, the first surface 101 of the body 10 is a smooth surface, and a second surface 102 of the body 10 opposite to the first surface 101 may be a rough surface. That is, the second surface roughness of the second surface 102 is greater than the first surface roughness of the portion of the first surface 101 outside the protrusion 20. In one example, the average roughness of the second centerline Ra is, for example, 3 μm to 7 μm. In an example, the ten-point average roughness Rz of the second surface 102 is, for example, 20 μm to 35 μm. When applied to a backlight module, the first surface 101 can be a light incident surface and the second surface 102 can be a light emitting surface; the second surface 102 can also be made a light incident surface and the first surface 101 can be a light emitting surface.

另外,於實施例中,光學板1例如是由透光性材料製作,例如是由一透光性樹脂所組成,再添加複數個擴散粒子以分散於其中。可使用之透光性樹脂例如聚碳酸酯(polycarbonate)、聚苯乙烯(PS)、聚甲基丙烯酸甲酯(PMMA)、甲基丙烯酸甲酯-苯乙烯(MS)、丙烯腈-苯乙烯(AS)、環狀聚烯烴(cyclo-olefin copolymer)、聚烯烴共聚物(如聚-4-甲基-1-戊烯)、聚對苯二甲酸乙二酯(polyethylene terephthalate)、聚酯、聚乙烯、聚丙烯、聚氯乙烯、離子鍵聚合物(ionomer)等。其中,又以聚碳酸酯、聚苯乙烯、聚甲基丙烯酸甲酯、甲基丙烯酸甲酯-苯乙烯為佳。因此,於一實施例中,光學板完成製作後,光學板之本體和形成之多個突起部之中可更包括複數個擴散粒子(例如透明微粒子)分散於其中以作為光擴散劑使用。In addition, in the embodiment, the optical plate 1 is made of, for example, a light-transmitting material, for example, it is composed of a light-transmitting resin, and a plurality of diffusion particles are added to be dispersed therein. Translucent resins that can be used include polycarbonate, polystyrene (PS), polymethyl methacrylate (PMMA), methyl methacrylate-styrene (MS), acrylonitrile-styrene ( AS), cyclic polyolefin (cyclo-olefin copolymer), polyolefin copolymer (such as poly-4-methyl-1-pentene), polyethylene terephthalate, polyester, poly Ethylene, polypropylene, polyvinyl chloride, ionomer, and the like. Among them, polycarbonate, polystyrene, polymethyl methacrylate, and methyl methacrylate-styrene are preferred. Therefore, in one embodiment, after the optical plate is manufactured, the body of the optical plate and the plurality of protrusions formed may further include a plurality of diffusing particles (such as transparent fine particles) dispersed therein for use as a light diffusing agent.

一實施例中,可使用之透光性樹脂為抗彎模數(Flexural Modulus)大於1GPa之樹脂,例如是抗彎模數大於2GPa之樹脂,此種類型的樹脂,可於外力作用下產生較小形變,即具有較佳的支撐性,使光學板1更適於背光模組的應用,即不需過度提高光學板1厚度就有良好的支撐性。In one embodiment, the translucent resin that can be used is a resin having a flexural modulus greater than 1 GPa, such as a resin having a flexural modulus greater than 2 GPa. This type of resin can produce a relatively large amount of resin under the action of external forces. Small deformation, that is, having better supportability, makes the optical plate 1 more suitable for the application of the backlight module, that is, it has good supportability without excessively increasing the thickness of the optical plate 1.

一實施例中,透光性樹脂的中量平均分子量範圍為15萬~45萬,於此範圍內可使透光性樹脂兼具良好的機械性與加工性;於另一實施例中,控制透光性樹脂的軟化點溫度(50℃/hr, 1kg)於95℃~150℃亦可使透光性樹脂具良好加工性。In one embodiment, the average molecular weight of the light-transmitting resin ranges from 150,000 to 450,000. Within this range, the light-transmitting resin can have both good mechanical properties and processability. In another embodiment, the control The softening point temperature (50 ° C / hr, 1kg) of the translucent resin can also make the translucent resin have good processability between 95 ° C and 150 ° C.

一實施例中,可使透光性樹脂中甲醇可溶份,即可溶解於甲醇中的寡聚物、添加劑、殘留單體等成分的總含量於1.5重量%以下,如此,可確保透光性樹脂的耐熱性。In one embodiment, the total content of methanol-soluble components in the translucent resin, that is, oligomers, additives, residual monomers, and other components that can be dissolved in methanol can be 1.5% by weight or less. In this way, light transmission can be ensured. Heat resistance of the resin.

一實施例中,透明之擴散粒子例如以二氧化矽、二氧化鈦為代表之無機微粒子,聚苯乙烯樹脂、(甲基)丙烯酸樹脂、矽樹脂等之有機微粒子,且以有機微粒子較佳,例如是單使用有機微粒子,亦或是混合使用有機微粒子與無機微粒子。有機微粒子又以已架橋之有機微粒子更佳,在其製造過程中至少有部分架橋,則在透光性樹脂的加工過程中不會產生變形,而可維持微粒子狀態。即,以即使加熱至透光性樹脂的成形溫度亦不會熔融於透光性樹脂中之微粒子較佳,且更宜為已架橋之(甲基)丙烯酸樹脂、矽樹脂之有機微粒子。一實施例中,特別適合的透明微粒(擴散粒子)例如有,以部分架橋的甲基丙烯酸甲酯為基質之聚合物微粒子聚(丙烯酸丁酯)的內核/聚(甲基丙烯酸甲酯)的外殼之聚合物、具有包含橡膠狀乙烯聚合物之內核與外殼的內核/外殼型態之聚合物〔羅門哈斯公司Rohm and Hass Campany製,商品名Paraloid EXL-5136〕、具有架橋矽氧烷基之矽樹脂〔東芝Silicone(股)公司製,商品名Tospearl 120〕。In one embodiment, the transparent diffusion particles are, for example, inorganic fine particles represented by silicon dioxide and titanium dioxide, organic fine particles such as polystyrene resin, (meth) acrylic resin, and silicon resin, and organic fine particles are preferred, for example, Use organic fine particles alone, or use a mixture of organic fine particles and inorganic fine particles. Organic microparticles are more preferably bridged organic microparticles. During the manufacturing process, at least some of the bridges are bridged, so that no deformation occurs during the processing of the translucent resin, and the state of the microparticles can be maintained. That is, fine particles that do not melt in the light-transmitting resin even when heated to the molding temperature of the light-transmitting resin are more preferable, and are more preferably organic fine particles of bridged (meth) acrylic resin and silicone resin. In one embodiment, particularly suitable transparent microparticles (diffuse particles) include, for example, polymer microparticles of poly (butyl acrylate) core / poly (methyl methacrylate) based on partially bridged methyl methacrylate. A polymer of a shell, a core / housing type polymer having a core and a shell containing a rubber-like vinyl polymer [manufactured by Rohm and Hass Campany, trade name Paraloid EXL-5136], having a bridged siloxane Silicone resin [made by Toshiba Silicone Co., Ltd., trade name Tospearl 120].

一實施例中,擴散粒子之平均粒徑為0.01 µm~30 µm。另一實施例中,添加於光學板1中的擴散粒子,其平均粒徑係為0.01 µm~20 µm。又一實施例中,添加於光學板1中的擴散粒子,其平均粒徑為0.01 µm~15 µm。擴散粒子之平均粒徑係以不突出本體10/突起部20之表面為佳。一實施例中,可同時混用無機微粒子與有機微粒子,例如是混用粒徑為0.01µm~0.05µm的二氧化鈦微粒子與粒徑為1µm~10µm的矽樹脂。一實施例中,光學板1的透光率為45%~70%,較佳為50%~65%。當光學板1的透光率為45%~70%時可同時保有較高的輝度表現並可避免因透光率太高而看見光源的問題。In one embodiment, the average particle diameter of the diffusion particles is 0.01 μm to 30 μm. In another embodiment, the average particle diameter of the diffusion particles added to the optical plate 1 is 0.01 μm to 20 μm. In another embodiment, the average particle diameter of the diffusion particles added to the optical plate 1 is 0.01 μm to 15 μm. It is preferable that the average particle diameter of the diffusion particles does not protrude from the surface of the main body 10 / projection 20. In one embodiment, inorganic fine particles and organic fine particles can be mixed together, for example, titanium dioxide fine particles having a particle diameter of 0.01 μm to 0.05 μm and silicon resin having a particle diameter of 1 μm to 10 μm can be mixed. In one embodiment, the light transmittance of the optical plate 1 is 45% to 70%, preferably 50% to 65%. When the light transmittance of the optical plate 1 is 45% ~ 70%, it can maintain high luminance performance at the same time and avoid the problem of seeing the light source because the light transmittance is too high.

另外,做為擴散粒子之該些透明微粒子的平均粒徑係以粒子計數法測定之重量平均粒徑,且可利用株式會社日科機之粒子數.粒度分布分析器MODEL Zm做為測定器。重量平均粒徑為0.01 µm~30 µm時可得到充分的光擴散性且使發光面具優良之發光性,即可有效的控制添加量,使光擴散性與透光率呈較佳表現。In addition, the average particle diameter of the transparent fine particles as the diffusion particles is a weight average particle diameter measured by a particle counting method, and the number of particles of Nikkei Co., Ltd. can be used. The particle size distribution analyzer MODEL Zm was used as a measuring device. When the weight-average particle diameter is 0.01 µm ~ 30 µm, sufficient light diffusivity can be obtained and the luminous mask has excellent luminosity. The amount of addition can be effectively controlled, and the light diffusivity and light transmittance are better.

另外,透明微粒子之使用量係基於100重量份之透光性樹脂為0.1~20重量份,且特別適合為0.35~12.5重量份。一實施例中,例如是添加0.05~1重量份的二氧化鈦微粒子與0.3~11.5重量份的矽樹脂。透明微粒子的使用量少於0.1重量份時會產生光擴散性不足,即可穿透而看見光源之問題。另一方面,透明微粒子的使用量超過20重量份時會降低光線透過率,且輝度變差。In addition, the used amount of the transparent fine particles is 0.1 to 20 parts by weight based on 100 parts by weight of the light-transmitting resin, and is particularly preferably 0.35 to 12.5 parts by weight. In one embodiment, for example, 0.05 to 1 part by weight of titanium dioxide fine particles and 0.3 to 11.5 parts by weight of silicone resin are added. When the amount of the transparent fine particles is less than 0.1 part by weight, there is a problem of insufficient light diffusibility, that is, the light source can be penetrated and seen. On the other hand, when the amount of the transparent fine particles used exceeds 20 parts by weight, the light transmittance is lowered and the brightness is deteriorated.

一實施例中,光學板1可使用聚苯乙烯(PS)(例如:台灣奇美GPPS PG-383D,其重量平均分子量約為30萬,軟化點溫度為106℃)之透光性樹脂並添加透明微粒子(例如:添加0.05~1重量份平均粒徑0.01µm~0.055µm的二氧化鈦微粒子與0.3~11.5重量份平均粒徑1µm~10µm的矽樹脂),可使用任意的方法或裝置將此組合採單層製作而形成基材(i.e.光擴散板)。實施例中,例如是使用熔融擠壓法來成形為預定厚度之板狀結構。以熔融擠壓時,最好在押出機的熔融區減壓至1.33~66.5 kPa後擠壓。若押出機的熔融區未減壓時,所配合之透明微粒子且特別是不融性丙烯酸系聚合物微粒子會受到氧氣的影響,而可能造成粒子表面部分崩壞使光擴散性能降低。又,除此以外,以往周知之方法亦可利用,例如射出成形、射出壓縮成形、吹塑成形、壓縮成形、粉末成形等方式都可完成實施例之光學板1之成形。In one embodiment, the optical plate 1 can be made of polystyrene (PS) (for example: Taiwan Chi Mei GPPS PG-383D, which has a weight average molecular weight of about 300,000 and a softening point temperature of 106 ° C) and is transparent. Micro particles (for example: adding 0.05 ~ 1 parts by weight of titanium dioxide fine particles with an average particle size of 0.01µm ~ 0.055µm and 0.3 ~ 11.5 parts by weight of silicone resin with an average particle size of 1µm ~ 10µm), this combination can be ordered by any method or device The layer is produced to form a substrate (ie light diffusion plate). In the embodiment, a plate-like structure having a predetermined thickness is formed by, for example, a melt extrusion method. In the case of melt extrusion, it is best to reduce the pressure in the melting zone of the extruder to 1.33-66.5 kPa and extrude. If the melting zone of the extruder is not decompressed, the matched transparent particles, especially the insoluble acrylic polymer particles, will be affected by oxygen, which may cause the particle surface to partially collapse and reduce the light diffusion performance. In addition, other methods known in the past can also be used. For example, injection molding, injection compression molding, blow molding, compression molding, and powder molding can be used to complete the molding of the optical plate 1 of the embodiment.

另外,除了單層板製作,本發明之光學板1亦可為多層板,例如除了上述透光性樹脂層,還可包括一被覆層。一實施例中,被覆層之厚度為0.01 mm~0.5 mm,或是0.02 mm~0.4 mm,或是0.03~0.3 mm。若被覆層之厚度超過0.5 mm,可能會有因背光模組單元厚度增大而無法充分達到液晶顯示裝置薄型化之要求的問題。再者,此被覆層例如具有可充分發揮透鏡效果之高透明性,可使用之樹脂為丙烯酸系樹脂,例如聚甲基丙烯酸甲酯、甲基丙烯酸甲酯-苯乙烯、丙烯腈-苯乙烯等。其中,又以聚甲基丙烯酸甲酯、甲基丙烯酸甲酯-苯乙烯為較佳。In addition, in addition to making a single-layer board, the optical board 1 of the present invention may also be a multi-layer board. For example, in addition to the above-mentioned light-transmitting resin layer, a coating layer may be included. In one embodiment, the thickness of the coating layer is 0.01 mm to 0.5 mm, or 0.02 mm to 0.4 mm, or 0.03 to 0.3 mm. If the thickness of the coating layer exceeds 0.5 mm, there may be a problem that the thickness of the backlight module unit may not be sufficient to meet the requirements for thinning the liquid crystal display device. In addition, this coating layer has, for example, high transparency that can fully exert the lens effect, and the resin that can be used is an acrylic resin such as polymethyl methacrylate, methyl methacrylate-styrene, acrylonitrile-styrene, etc. . Among them, polymethyl methacrylate and methyl methacrylate-styrene are more preferable.

另外,於光學板1之組成中更可包括紫外線吸收劑之添加,以提高光學板1的耐候性及阻絕有害之紫外線;和/或更可包括螢光劑之添加,螢光劑具有可吸收光線的紫外線部能量,並將該能量放射至可視部之作用。In addition, the composition of the optical plate 1 may further include the addition of an ultraviolet absorber to improve the weatherability of the optical plate 1 and block harmful ultraviolet rays; and / or may include the addition of a fluorescent agent, which can absorb light. The ultraviolet portion of the light is radiated to the visible portion.

在光學板1為多層板之一實施例中,形成上述被覆層之丙烯酸系樹脂100重量份中,含有紫外線吸收劑0.5~15重量份,並可依需要加入平均粒徑0.01µm~30µm的擴散粒子例如透明微粒子0.1~20重量份,以及螢光劑0.001~0.1重量份。In an embodiment in which the optical plate 1 is a multilayer board, 100 parts by weight of the acrylic resin forming the above-mentioned coating layer contains 0.5 to 15 parts by weight of an ultraviolet absorber, and a diffusion having an average particle diameter of 0.01 μm to 30 μm may be added as required. The particles are, for example, 0.1 to 20 parts by weight of transparent fine particles and 0.001 to 0.1 parts by weight of a fluorescent agent.

一實施例中,紫外線吸收劑例如:2,2’-二羥基-4-甲氧基二苯甲酮之二苯甲酮系紫外線吸收劑、2-(4,6-二苯基-1,3,5-三嗪-2-取代基)-5-己基羥基苯酚之三嗪系紫外線吸收劑、2-(2H-苯并三唑-2-取代基)-4-甲基苯酚、2-(2H-苯并三唑-2-取代基)-4-第三辛基苯酚、2-(2H-苯并三唑-2-取代基)-4,6-雙(1-甲基-1-苯乙基)酚、2-(2H-苯并三唑-2-取代基)-4,6-雙-第三戊基苯酚、2-(5-氯基-2H-苯并三唑-2-取代基)-4-甲基-6-第三丁基苯酚、2-(5-氯基-2H-苯并三唑-2-取代基)-2,4-第三丁基苯酚及2,2’-亞甲基雙〔6-(2H-苯并三唑-2-取代基)-4-(1,1,3,3-四甲基丁基)酚〕等之苯并三唑系紫外線吸收劑。In one embodiment, the ultraviolet absorber is, for example, a benzophenone-based ultraviolet absorbent of 2,2'-dihydroxy-4-methoxybenzophenone, 2- (4,6-diphenyl-1, 3,5-triazine-2-substituent) -5-hexylhydroxyphenol triazine-based ultraviolet absorber, 2- (2H-benzotriazole-2-substituent) -4-methylphenol, 2- (2H-benzotriazole-2-substituent) -4-third octylphenol, 2- (2H-benzotriazole-2-substituent) -4,6-bis (1-methyl-1 -Phenyl) phenol, 2- (2H-benzotriazole-2-substituent) -4,6-bis-tertiaryamylphenol, 2- (5-chloro-2H-benzotriazole- 2-Substituent) -4-methyl-6-tert-butylphenol, 2- (5-chloro-2H-benzotriazole-2-substituent) -2,4-tert-butylphenol and 2,2'-Methylenebis [6- (2H-benzotriazole-2-substituent) -4- (1,1,3,3-tetramethylbutyl) phenol] and other benzotris An azole-based ultraviolet absorber.

一實施例中,較佳的紫外線吸收劑例如:2-(2-羥基-5-甲苯基)苯并三唑、2-(2-羥基-5-第三辛苯基)苯并三唑、2-(2-羥基-3,5-二異丙苯)苯基苯并三唑、2-(2-羥基-3-第三丁基-5-甲苯基)-5-氯基苯并三唑、2,2’-亞甲基雙〔4-(1,1,3,3四甲基丁基)-6-(2H-苯并三唑-2-取代基)酚〕、2-〔2-羥基-3-(3,4,5,6-四氫鄰苯二醯亞胺甲基)-5-甲苯基〕苯并三唑。其中,以2-(2-羥基-5-第三辛苯基)苯并三唑(Ciba-Geigy公司製,商品名Tinuvin 329)、2,2’-亞甲基雙〔4-(1,1,3,3-四甲基丁基)-6-(2H-苯并三唑-2-取代基)酚〕為佳。In one embodiment, preferred ultraviolet absorbers are, for example, 2- (2-hydroxy-5-tolyl) benzotriazole, 2- (2-hydroxy-5-third-octylphenyl) benzotriazole, 2- (2-hydroxy-3,5-dicumene) phenylbenzotriazole, 2- (2-hydroxy-3-tertiarybutyl-5-tolyl) -5-chlorobenzotriazine Azole, 2,2'-methylenebis [4- (1,1,3,3tetramethylbutyl) -6- (2H-benzotriazole-2-substituent) phenol], 2- [ 2-hydroxy-3- (3,4,5,6-tetrahydro-o-phthalimidomethyl) -5-tolyl] benzotriazole. Among them, 2- (2-hydroxy-5-tertiary octylphenyl) benzotriazole (Ciba-Geigy, trade name Tinuvin 329), 2,2'-methylenebis [4- (1, 1,3,3-tetramethylbutyl) -6- (2H-benzotriazole-2-substituent) phenol] is preferred.

再者,實施例中使用紫外線吸收劑時,可單獨選用一種成分或合併使用2種成分以上,且相對於丙烯酸系樹脂100重量份以使用0.5~15重量份為佳,並以1~10重量份更佳。當使用量小於0.5重量份時,則耐候性不佳而使得色相變化大,當使用量大於15重量份時,則色調及輝度皆變差。In addition, when an ultraviolet absorbent is used in the examples, one component may be selected singly or two or more components may be used in combination, and it is preferable to use 0.5 to 15 parts by weight relative to 100 parts by weight of the acrylic resin, and 1 to 10 parts by weight. Serve better. When the amount used is less than 0.5 parts by weight, the weather resistance is not good and the hue change is large. When the amount used is more than 15 parts by weight, the hue and brightness are deteriorated.

另外,實施例中所使用的螢光劑(具有可吸收光線的紫外線部能量,並將該能量放射至可視部之作用者)係在不損及耐光性之範圍內,用以將合成樹脂等之色調改善成白色或藍白色者,例如二苯乙烯系、苯并咪唑系、苯并噁唑系、苯二甲醯亞胺系、玫瑰紅系、香豆素系、噁唑系化合物等。一實施例中,螢光劑之使用量例如是相對於丙烯酸系樹脂100重量份之0.001~0.1重量份的範圍,且以0.002~0.08重量份的範圍較佳。藉由在前述範圍內配合螢光劑,可使發光面得到充分的發光性及色調改良的效果。In addition, the fluorescent agent used in the examples (having the energy of the ultraviolet part capable of absorbing light and radiating the energy to the visible part) is within a range that does not impair the light resistance, and is used to mix synthetic resins, etc. Those whose color tone is improved to white or blue-white, for example, stilbene-based, benzimidazole-based, benzoxazole-based, xylylenediimide-based, rose red-based, coumarin-based, oxazole-based compounds, and the like. In one embodiment, the amount of the fluorescent agent used is, for example, a range of 0.001 to 0.1 parts by weight relative to 100 parts by weight of the acrylic resin, and a range of 0.002 to 0.08 parts by weight is preferable. By blending the fluorescer in the above range, the light-emitting surface can obtain a sufficient luminous property and the effect of improving hue.

而雖然上述係配合第1圖和第2A圖對本發明其中一實施例作進一步說明,但本發明並不以此為限制。第9圖為本發明另一實施例之一光學板之局部示意圖。第10圖為沿著第9圖中一剖面線10-10繪示之另一種突起部之剖面示意圖。第9-10圖與第1~2A圖相同或類似的元件係沿用相同或類似的標號,以利清楚說明。如第9圖所示,光學板1’同樣包括一本體10和複數個突起部30位於本體10之第一表面101上並突出於第一表面101。於此實施例中突起部30之間距Dp、最大高度Hp和傾斜角α,以及第一表面101和第二表面102之粗糙度等相關說明,請參考前述內容,在此不贅述。此實施例之突起部30與前述如第1~2A圖之突起部20不同在於,一突起部30係包括一凸塊30B和一環狀部(bottom ring)30R,環狀部30R位於凸塊30B下方。如第9、10圖所示,環狀部30R圍繞並連接凸塊30B,且於第一表面101形成一突出的外緣301。於一實際製作中,環狀部30R和凸塊30B係與本體10之皆一體成形。不論是如第1~2A圖所示之突起部20或是否如第9~10圖所示之突起部30,都可使顯示裝置的發光區域維持高輝度並且可達到提高輝度均齊度之優點。
<相關實驗>
Although one of the embodiments of the present invention is further described in conjunction with FIG. 1 and FIG. 2A, the present invention is not limited thereto. FIG. 9 is a partial schematic diagram of an optical plate according to another embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of another protruding portion shown along a section line 10-10 in FIG. 9. Elements in FIGS. 9-10 that are the same as or similar to those in FIGS. 1 to 2A are denoted by the same or similar reference numerals for the sake of clear explanation. As shown in FIG. 9, the optical plate 1 ′ also includes a body 10 and a plurality of protrusions 30 located on the first surface 101 of the body 10 and protruding from the first surface 101. In this embodiment, the distance Dp, the maximum height Hp, the inclination angle α between the protrusions 30, and the roughness of the first surface 101 and the second surface 102, and other related descriptions, please refer to the foregoing content, and are not repeated here. The protruding portion 30 of this embodiment is different from the aforementioned protruding portion 20 as shown in FIGS. 1 to 2A in that a protruding portion 30 includes a bump 30B and a bottom ring 30R. The ring portion 30R is located on the bump. Below 30B. As shown in FIGS. 9 and 10, the annular portion 30R surrounds and connects the bump 30B, and forms a protruding outer edge 301 on the first surface 101. In an actual production, the ring portion 30R and the bump 30B are integrally formed with the body 10. Whether it is the protruding portion 20 as shown in FIGS. 1 to 2A or the protruding portion 30 as shown in FIGS. 9 to 10, the light emitting area of the display device can maintain high luminance and can achieve the advantage of improving uniformity of luminance. .
< Related experiments >

以下係列出其中幾組相關實驗及其數據以作實施例之說明。光學板1之結構請參照上述內容和第1~10圖。在實驗中,係提出幾組試樣,且各試樣之規格如下:In the following series, several groups of related experiments and their data are used to illustrate the examples. For the structure of the optical plate 1, please refer to the above and Figs. 1-10. In the experiment, several sets of samples are proposed, and the specifications of each sample are as follows:

比較例1—市售之單面咬花擴散板DS551A(奇美實業),其表面的中心線平均粗糙度Ra為3~7µm,厚度為1.5mm。Comparative Example 1—A commercially available single-sided bite diffuser DS551A (Chimei Industrial) has a surface centerline average roughness Ra of 3 to 7 μm and a thickness of 1.5 mm.

比較例2—一種擴散板具有多個不規則島狀物突出於基材本體之表面,這些不規則島狀物頂面的最長平台寬度範圍係為0.388~2.315mm,高度為23.02µm,相鄰之不規則島狀物之間的距離為21~433µm,厚度為1.5mm 。Comparative Example 2-A diffuser plate has a plurality of irregular islands protruding from the surface of the substrate body. The longest platform width of the top surface of these irregular islands ranges from 0.388 to 2.315 mm, and the height is 23.02 µm. The distance between the irregular islands is 21 ~ 433µm, and the thickness is 1.5mm.

實驗例1~3—如上述第1、2A圖中所述之光學板。相關參數係列於表1。Experimental Examples 1 to 3—Optical plates as described in the above Figures 1 and 2A. Related parameter series are shown in Table 1.

輝度、四角均齊度:Brightness, evenness of four corners:

係使用日本拓普康公司(TOPCON CORPORATION)所製造型號BM-7A的輝度計來進行測定,並且於測定時係將實驗例1~3及比較例1~2的光擴散板設置於以LED燈源陣列設置的燈箱模組上進行輝度量測。其中,輝度(luminance)值為標準化後數值,即將比較例1~2及實驗例1~3的中心輝度量測值以標準品(現行市售擴散板DS601A (奇美實業))輝度量測值為100%進行標準化後的數值。四角均齊度是以模組四角的輝度除以模組之中心輝度之後四個數值的平均值。The measurement was performed using a luminance meter model BM-7A manufactured by TOPCON CORPORATION, and the light diffusion plates of Experimental Examples 1 to 3 and Comparative Examples 1 to 2 were set to LED lamps during the measurement. Glow measurement is performed on the light box module set by the source array. Among them, the luminance value is a normalized value, that is, the central luminance measurement values of Comparative Examples 1 to 2 and Experimental Examples 1 to 3 are based on the standard product (the current commercially available diffuser plate DS601A (Chimei Industrial)) luminance measurement value. 100% normalized value. The four-corner uniformity is the average of the four values of the four corners of the module divided by the central brightness of the module.

粗糙度:Roughness:

使用三豐(Mitutoyo)公司之表面粗度試驗機儀(型號SJ-210)進行表面粗糙度之量測。隨機量測突起部以外的第一表面粗糙度Ra與Rz及第二表面之Ra與Rz,量測距離為5mm。A surface roughness tester (model SJ-210) from Mitutoyo was used to measure the surface roughness. The first surface roughness Ra and Rz and the second surface Ra and Rz other than the protrusions were randomly measured, and the measurement distance was 5 mm.

突起部之外徑、高度、傾斜角、間距:Outer diameter, height, inclination angle and pitch of the protrusion:

藉由使用基恩斯(KEYENCE)公司之雷射共軛焦儀(型號VK-X100 Series)作為測量儀器,隨機取樣量測。By using KEYENCE's laser conjugate focus meter (model VK-X100 Series) as a measuring instrument, random sampling and measurement are performed.

以上量測結果一併紀錄於表1中。但表1之數值僅作示例之用,本發明之實施例範圍並不以此表列數值為限。The above measurement results are recorded in Table 1. However, the values in Table 1 are only examples, and the scope of the embodiment of the present invention is not limited to the values in the table.

表1
Table 1

由表1之數據可知,實驗例1~3因具有突起部於第一表面所佔比例範圍為0.03%~35%及第一表面於突起部以外的部份係的第一中心線平均粗糙度Ra為0.01 µm~0.1µm等特徵,其平均四角均齊度皆較比較例1~2佳,即於實驗例1~3的突起部設計可使光學板有更好的均齊度表現。It can be known from the data in Table 1 that the experimental examples 1 to 3 have the average roughness of the first centerline because of the proportion of the projections on the first surface ranging from 0.03% to 35% and the portion of the first surface other than the projections. Ra is from 0.01 µm to 0.1 µm, and its average four-corner uniformity is better than that of Comparative Examples 1 to 2. That is, the design of the protrusions in Experimental Examples 1 to 3 can make the optical plate have better uniformity performance.

此外,由表1的資料可知,實驗例1~3的光學板因具有突起部於第一表面所占比例範圍為0.03%~35%及第一表面於突起部以外的部份系的第一中心線平均粗糙度Ra為0.01 µm~0.1µm等特徵,其60度角光澤的數值皆較比較例1~2佳,即於實驗例1~3的突起部設計可提高斜向光線的反射率, 進而使光學板有更好的均齊度表現。In addition, from the data in Table 1, it can be seen that the optical plates of Experimental Examples 1 to 3 have the proportion of the protrusions on the first surface ranging from 0.03% to 35%, and the first surface is the first portion outside the protrusions. The centerline average roughness Ra is 0.01 µm ~ 0.1µm, and its 60-degree angle gloss values are better than those of Comparative Examples 1 ~ 2. That is, the protrusion design of Experimental Examples 1 ~ 3 can improve the reflectance of oblique rays. , So that the optical plate has better uniformity performance.

請參照第11A圖,繪示應用本發明一實施例之光學板的一種背光模組的示意圖。本實施例的背光模組400例如為適用於平面顯示模組的直下式背光模組,其包括一擴散板410、至少一光源420(第11A圖繪示複數個光源)及一框架440。框架定義一容置空間442,擴散板410及光源420位於容置空間442內,擴散板410置於光源420的上方。擴散板410,例如是上述實施例中任一例之光學板,包括具有一第一表面101之一本體10以及位於第一表面101上並突出於第一表面101的複數個突起部20。於第11A圖中,光源420係與擴散板410的第一表面101係相對設置。此時,因擴散板410的第一表面101的中心線平均粗糙度Ra為0.01 µm~0.1µm,且其60度角光澤大於90,因此,可以有效地將自光源420高角度入射(斜向入射)至擴散板410第一表面101的光線透過反射的方式往擴散板410的四個邊角方向傳遞,即擴散板410具高四角均齊度,因此可使背光模組具高輝度均齊度。Please refer to FIG. 11A, which illustrates a schematic diagram of a backlight module using an optical plate according to an embodiment of the present invention. The backlight module 400 of this embodiment is, for example, a direct type backlight module suitable for a flat display module, and includes a diffuser plate 410, at least one light source 420 (a plurality of light sources are shown in FIG. 11A), and a frame 440. The frame defines an accommodating space 442. The diffuser plate 410 and the light source 420 are located in the accommodating space 442. The diffuser plate 410 is disposed above the light source 420. The diffusion plate 410 is, for example, an optical plate in any of the above embodiments, and includes a body 10 having a first surface 101 and a plurality of protrusions 20 located on the first surface 101 and protruding from the first surface 101. In FIG. 11A, the light source 420 is disposed opposite to the first surface 101 of the diffuser plate 410. At this time, since the average roughness Ra of the center line of the first surface 101 of the diffusion plate 410 is 0.01 μm to 0.1 μm, and its 60-degree angular gloss is greater than 90, it can effectively enter the light source 420 at a high angle (inclinedly) The light incident to the first surface 101 of the diffuser plate 410 is transmitted to the four corners of the diffuser plate 410 through reflection, that is, the diffuser plate 410 has a high uniformity of the four corners, so that the backlight module can have a uniform high brightness. degree.

一應用例中,光源420例如包括基板422及發光單元424,發光單元424例如為發光二極體(light emitting diode,LED)元件或其它種類之發光元件且配置於基板422上。發光單元424發出的光線進入擴散板410後經由擴散板410的第二表面102出光,藉以形成高輝度均齊度的面光源。In an application example, the light source 420 includes, for example, a substrate 422 and a light-emitting unit 424. The light-emitting unit 424 is, for example, a light emitting diode (LED) element or other types of light-emitting elements and is disposed on the substrate 422. The light emitted by the light emitting unit 424 enters the diffuser plate 410 and then emits light through the second surface 102 of the diffuser plate 410, thereby forming a surface light source with high uniformity of brightness.

第11B圖繪示應用本發明一實施例之光學板的另一種背光模組的示意圖。第11B圖與第11A圖不同的是,第11B圖中之光學板的主體10,其較粗糙的表面(e.g.第二表面102)例如為一咬花面係朝向背光模組之光源420,亦屬本發明之其中一種應用。於此實施例中,可再透過膠體層貼附其他光學膜層或光學板於突起部上以提高背光模組整體的光學表現。FIG. 11B is a schematic diagram of another backlight module to which the optical plate according to an embodiment of the present invention is applied. The difference between FIG. 11B and FIG. 11A is that the rough surface (eg, the second surface 102) of the main body 10 of the optical plate in FIG. 11B is, for example, a biting surface that faces the light source 420 of the backlight module. It is one of the applications of the present invention. In this embodiment, another optical film layer or optical plate can be attached to the protruding portion through the colloid layer to improve the overall optical performance of the backlight module.

一實施例中,膠體層例如是使用丙烯酸,聚氨酯,橡膠或矽氧烷等感壓黏合劑。第12A圖係繪示應用本發明一實施例之光學板與一光學膜貼合之示意圖。第12B圖係為沿第12A圖之一剖面線12B-12B所繪製的光學板與光學膜之剖面示意圖。請同時參照第12A、12B圖。In one embodiment, the colloidal layer is, for example, a pressure-sensitive adhesive such as acrylic, polyurethane, rubber, or siloxane. FIG. 12A is a schematic diagram illustrating bonding of an optical plate and an optical film to which an embodiment of the present invention is applied. FIG. 12B is a schematic cross-sectional view of an optical plate and an optical film drawn along a section line 12B-12B of FIG. 12A. Please also refer to Figures 12A and 12B.

於一示例中,實施例之光學板1係與一光學膜OP以一膠體層71貼合,其中光學膜OP例如是設置於本體10之第一表面101的上方,膠體層71設置於光學板1與光學膜OP之間,且膠體層71係黏合光學板1之突起部20的頂面。如第12B圖所示,膠體層71具有一厚度Lad ,光學膜OP到第一表面101之間具有一距離Lgap ,光學板1之突起部20的頂面係陷於膠體層71中並支撐住光學膜OP,亦即膠體層71不直接貼附和接觸第一表面101,因此在本體10之第一表面101與膠體層71之間係形成有一空氣層80。一示例中,膠體層71之厚度Lad 例如是3~7µm,光學膜OP底部到第一表面101之間的距離Lgap 例如是10~42µm。再者,實施例之空氣層80係均勻地形成於光學板1與膠體層71之間,亦即在整片光學膜OP的下方,本體10之第一表面101到膠體層71底面之間係維持大約相同的高度。與膠體層71直接貼附和接觸第一表面101的光學結構相比,空氣層80的存在可使出射於第一表面的光線產生較大角度的折射,因而加強光學擴散效果(light diffusion effect)。In an example, the optical plate 1 of the embodiment is bonded to an optical film OP with a colloid layer 71. The optical film OP is, for example, disposed above the first surface 101 of the body 10. The colloid layer 71 is disposed on the optical plate. 1 and the optical film OP, and the colloid layer 71 is bonded to the top surface of the protruding portion 20 of the optical plate 1. As shown in FIG. 12B, the colloid layer 71 has a thickness L ad , the optical film OP has a distance L gap from the first surface 101, and the top surface of the protrusion 20 of the optical plate 1 is trapped in the colloid layer 71 and supported. The optical film OP is held, that is, the colloidal layer 71 does not directly adhere to and contact the first surface 101. Therefore, an air layer 80 is formed between the first surface 101 of the body 10 and the colloidal layer 71. In an example, the thickness L ad of the colloidal layer 71 is, for example, 3 to 7 μm, and the distance L gap between the bottom of the optical film OP and the first surface 101 is, for example, 10 to 42 μm. Furthermore, the air layer 80 of the embodiment is uniformly formed between the optical plate 1 and the colloidal layer 71, that is, under the entire optical film OP, between the first surface 101 of the body 10 and the bottom surface of the colloidal layer 71. Maintain approximately the same height. Compared with the optical structure in which the colloidal layer 71 directly adheres and contacts the first surface 101, the presence of the air layer 80 can cause a larger angle of refraction of the light emitted from the first surface, thereby enhancing the light diffusion effect.

一實施例中,考量膠體層厚度與保有空氣層存在的設計,突起部20的最大高度Hp的範圍應在10µm~35µm範圍之間,例如是在12µm~30µm範圍之間,或是在15µm~27µm範圍之間,如此可確保空氣層均勻地形成於光學板1與膠體層71之間。In one embodiment, considering the thickness of the colloid layer and the design with the presence of an air layer, the maximum height Hp of the protrusion 20 should be in the range of 10µm ~ 35µm, such as 12µm ~ 30µm, or 15µm ~ In the range of 27µm, this ensures that the air layer is evenly formed between the optical plate 1 and the colloid layer 71.

一實施例中,當突起部之外徑Dm範圍為200 µm~500 µm且兩相鄰的突起部間的間距為0.5 mm~10mm範圍內時,可有效地對所貼附之光學膜OP提供良好的支撐效果,即可使第一表面101到膠體層71底面之間係維持大約相同的高度。另一實施中,當突起部於第一表面的所佔比例為0.03%~35%,且第一表面於突起部以外的部份的第一中心線平均粗糙度Ra為0.01 µm~0.1µm時,可兼具對光學膜OP提供良好的支撐效果與高四角均齊度的良好擴散表現。In one embodiment, when the outer diameter Dm of the protrusion is in the range of 200 µm to 500 µm and the distance between two adjacent protrusions is in the range of 0.5 mm to 10 mm, it can effectively provide the attached optical film OP. With good supporting effect, the first surface 101 and the bottom surface of the colloid layer 71 can be maintained at about the same height. In another implementation, when the proportion of the protrusion on the first surface is 0.03% to 35%, and the first centerline average roughness Ra of the portion of the first surface other than the protrusion is 0.01 μm to 0.1 μm It can provide both a good support effect for the optical film OP and a good diffusion performance with high uniformity of the four corners.

一實施例中,於具有突起部頂點P的突起部結構,例如是圖2B的突起部20、第3A~4C圖的突起部、或是第6A~6C圖及第6F~6H圖的突起部,突起部頂點P可陷於膠體層71中以產生投錨效果, 進而增加膠體層71與突起部的接著力。In one embodiment, the protrusion structure having the protrusion apex P is, for example, the protrusion 20 of FIG. 2B, the protrusions of FIGS. 3A to 4C, or the protrusions of FIGS. 6A to 6C and 6F to 6H. The apex P of the protruding portion may be trapped in the colloidal layer 71 to generate an anchoring effect, thereby increasing the adhesion between the colloidal layer 71 and the protruding portion.

一實施例中,如第12C圖所示,具有凹陷部20R的突起部,例如是第6A~6C圖或是第6F~6H圖的突起部(圖12C繪示具第6B圖突起部之示意圖),可藉由調整凹陷部20R的下凹深度HD (繪示於第6B圖)的大小來增加空氣層的比例,即使下凹深度HD 與最大高度Hp(繪示於第6B圖)的比例範圍為15%~100%,例如是30%~100%或是50%~90%。當下凹深度HD 與最大高度Hp的比例落入15%~100%範圍內,於與光學膜OP以膠體層71貼合後,凹陷部仍保留部分未陷入膠體層71的空間,可藉此增加整體空氣層的比例,再次加強光學擴散效果以提升整體光學表現。In an embodiment, as shown in FIG. 12C, the protruding portion having the recessed portion 20R is, for example, the protruding portion of FIGS. 6A to 6C or 6F to 6H (FIG. 12C is a schematic view showing the protruding portion of FIG. 6B) ), The proportion of the air layer can be increased by adjusting the depression depth H D (shown in FIG. 6B) of the recessed portion 20R, even if the depression depth H D and the maximum height Hp (shown in FIG. 6B) The proportion ranges from 15% to 100%, such as 30% to 100% or 50% to 90%. When the range of the ratio of concave depth H D and the maximum height Hp falls from 15% to 100%, OP after the optical film bonded to adhesive layer 71, the recessed portion remains some space that is not in the colloid layer 71, can use this Increase the proportion of the overall air layer and strengthen the optical diffusion effect again to improve the overall optical performance.

再者,可應用之光學膜OP例如是包括一張或多張擴散膜和一或多個稜鏡層(prism sheets)等多層光學膜材或是微透鏡膜(microlens film)和一或多個稜鏡層等多層光學膜材,以調整出光角度(例如集中光線)。雖然第12A~12C圖中係以光學膜OP包括一擴散膜73和一稜鏡層74為例做說明,但本發明並不特別限制可應用之相關光學膜片和/或稜鏡結構、層數或態樣。Moreover, the applicable optical film OP is, for example, a multilayer optical film material including one or more diffusion films and one or more prism sheets, or a microlens film and one or more Multi-layer optical film materials, such as sacral layers, to adjust the light output angle (for example, concentrated light). Although in FIGS. 12A to 12C, the optical film OP includes a diffusion film 73 and a chirped layer 74 as an example, the present invention does not specifically limit the applicable optical film and / or chirped structure and layers. Number or aspect.

前述背光模組400可用作為一顯示裝置之背光模組,例如是電視、筆記本個人電腦、移動電腦、用於電腦等的監視器等或可直接將背光模組400作為照明用,例如是展示用燈箱、看板。The aforementioned backlight module 400 can be used as a backlight module of a display device, such as a television, a notebook personal computer, a mobile computer, a monitor for a computer, etc., or the backlight module 400 can be directly used for lighting, such as a display. Lightbox, Kanban.

綜上所述,實施例提出之光學板,係具有如上述特殊設計之突起部形成於主體表面上。應用實施例之光學板(如第1、9圖所示)作為擴散板時,相較於現行擴散板更可提高輝度均齊度。因此,應用實施例之光學板作為擴散板不但可以提昇影像的顯示效果,避免莫爾(moire)干涉條紋發生情形,還可以減少其他機能性膜使用的數量,降低製造成本,並且使應用的顯示裝置整體變得更輕薄,特別是對於大型尺寸顯示裝置具有極高的應用價值。另外,應用實施例之光學板作為擴散板且其突起部與一光學膜透過膠體貼合時,突起部還可支撐光學膜以於光學板本體之表面與膠體層之間形成一空氣層,可更加強整體的光學擴散效果。In summary, the optical plate proposed in the embodiment is formed on the surface of the main body with the protruding portion having the special design as described above. When the optical plate of the embodiment (as shown in Figs. 1 and 9) is used as a diffusion plate, the brightness uniformity can be improved compared to the current diffusion plate. Therefore, using the optical plate of the embodiment as a diffusion plate can not only improve the display effect of the image, avoid the occurrence of moire interference fringes, but also reduce the number of other functional films, reduce manufacturing costs, and make the display of the application The device as a whole becomes thinner and thinner, and has extremely high application value especially for large-sized display devices. In addition, when the optical plate of the embodiment is used as a diffusion plate and its protrusions are bonded with an optical film through the colloid, the protrusions can also support the optical film to form an air layer between the surface of the optical plate body and the colloid layer. Strengthen the overall optical diffusion effect.

綜上所述,雖然本發明已以實施例發明如上,然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾。因此,本發明之保護範圍當視後附之申請專利範圍所界定者為準。To sum up, although the present invention has been invented by way of example, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

1‧‧‧光學板1‧‧‧ Optical Plate

10‧‧‧本體 10‧‧‧ Ontology

101‧‧‧本體之第一表面 101‧‧‧ the first surface of the body

102‧‧‧本體之第二表面 102‧‧‧Second surface of the body

20、20-1、20-2、20-3、20-4、20-5、30‧‧‧突起部 20, 20-1, 20-2, 20-3, 20-4, 20-5, 30‧‧‧ protrusions

20R‧‧‧凹陷部 20R‧‧‧ Depression

20R1‧‧‧凹點 20R1‧‧‧Dip

20R2‧‧‧平面 20R2‧‧‧Plane

20u‧‧‧顶面 20u‧‧‧Top

201‧‧‧突起表面 201‧‧‧ raised surface

30B‧‧‧凸塊 30B‧‧‧ bump

30R‧‧‧環狀部 30R‧‧‧Ring

Dp‧‧‧間距 Dp‧‧‧pitch

Dm‧‧‧外徑 Dm‧‧‧ Outside diameter

α‧‧‧傾斜角 α‧‧‧ tilt angle

HD‧‧‧下凹深度H D ‧‧‧Down Depth

Hp‧‧‧最大高度 Hp‧‧‧Maximum height

Ds‧‧‧兩相鄰突起部之間的最短距離 Ds‧‧‧The shortest distance between two adjacent protrusions

Hm‧‧‧本體之厚度 Hm‧‧‧ thickness of body

400‧‧‧背光模組 400‧‧‧ backlight module

410‧‧‧擴散板 410‧‧‧ diffuser

420‧‧‧光源 420‧‧‧light source

422‧‧‧基板 422‧‧‧ substrate

424‧‧‧發光單元 424‧‧‧Light-emitting unit

440‧‧‧框架 440‧‧‧Frame

442‧‧‧容置空間 442‧‧‧accommodation space

OP‧‧‧光學膜 OP‧‧‧ Optical Film

71‧‧‧膠體層 71‧‧‧ colloid layer

73‧‧‧擴散膜 73‧‧‧ diffuser

74‧‧‧稜鏡層 74‧‧‧ 稜鏡

80‧‧‧空氣層 80‧‧‧air layer

Lad‧‧‧膠體層之厚度L ad ‧‧‧thickness of colloidal layer

Lgap‧‧‧光學膜到第一表面之間的距離L gap ‧‧‧ distance between optical film and first surface

P‧‧‧突起部頂點 P‧‧‧ Projection Vertex

第1圖為本發明一實施例之一光學板之局部示意圖。FIG. 1 is a partial schematic diagram of an optical plate according to an embodiment of the present invention.

第2A圖為沿著第1圖中一剖面線2-2繪示之一突起部之剖面示意圖。 FIG. 2A is a schematic cross-sectional view of a protruding portion shown along a section line 2-2 in FIG. 1.

第2B圖為第1圖之單個突起部的示意圖。 FIG. 2B is a schematic view of a single protruding portion of FIG. 1.

第3A~3D圖繪製突起表面為曲面的數個示例的示意圖。 3A to 3D are schematic diagrams of several examples in which the protrusion surface is a curved surface.

第4A~4C圖繪製突起部為錐狀凸塊的數個示例的示意圖。 4A to 4C are schematic diagrams showing several examples in which the protrusions are tapered bumps.

第5A~5C圖繪製突起部具有頂面的數個示例的示意圖。 5A to 5C are schematic diagrams showing several examples in which the protrusion has a top surface.

第6A~6K圖繪製突起部具有凹陷部的數個示例的示意圖。 6A to 6K are schematic diagrams showing several examples in which the protruding portion has a recessed portion.

第7A~7B圖繪製具有階梯狀結構的突起部的示意圖。 7A to 7B are schematic diagrams of protrusions having a stepped structure.

第8圖係繪製依據本發明一實施例之光學板之主體上分佈有多個突起部之示意圖。 FIG. 8 is a schematic diagram of a plurality of protrusions distributed on a main body of an optical plate according to an embodiment of the present invention.

第9圖為本揭露發明另一實施例之一光學板之局部示意圖。 FIG. 9 is a partial schematic diagram of an optical plate according to another embodiment of the disclosure.

第10圖為沿著第9圖中一剖面線10-10繪示之另一種突起部之剖面示意圖。 FIG. 10 is a schematic cross-sectional view of another protruding portion shown along a section line 10-10 in FIG. 9.

第11A圖繪示應用本發明一實施例之光學板的一種背光模組的示意圖。 FIG. 11A is a schematic diagram of a backlight module using an optical plate according to an embodiment of the present invention.

第11B圖繪示應用本發明一實施例之光學板的另一種背光模組的示意圖。 FIG. 11B is a schematic diagram of another backlight module to which the optical plate according to an embodiment of the present invention is applied.

第12A圖係繪示應用本發明一實施例之光學板與一光學膜貼合之示意圖。 FIG. 12A is a schematic diagram illustrating bonding of an optical plate and an optical film to which an embodiment of the present invention is applied.

第12B圖係為沿第12A圖之一剖面線12B-12B所繪製的光學板與光學膜之剖面示意圖。 FIG. 12B is a schematic cross-sectional view of an optical plate and an optical film drawn along a section line 12B-12B of FIG. 12A.

第12C圖係為沿第12B圖之光學膜之另一實施態樣之剖面示意圖。 Fig. 12C is a schematic cross-sectional view of another embodiment of the optical film along Fig. 12B.

Claims (14)

一種光學板,包括: 一本體,具有一第一表面;以及 複數個突起部,位於該第一表面上並突出於該第一表面,該些突起部於該本體之該第一表面的所佔比例為0.03%~35%,兩相鄰的該些突起部之間具有一間距(pitch)為0.5 mm~10mm,且該第一表面於該些突起部以外的部份係具有一第一中心線平均粗糙度Ra為0.01 µm~0.1µm。An optical plate includes: A body having a first surface; and A plurality of protrusions are located on the first surface and protrude from the first surface, and the proportion of the protrusions on the first surface of the body is 0.03% to 35%, and two adjacent protrusions There is a pitch between 0.5 mm and 10 mm, and the portion of the first surface other than the protrusions has a first centerline average roughness Ra of 0.01 μm to 0.1 μm. 如申請專利範圍第1項所述的光學板,其中該些突起部之一外徑為200 µm~500 µm。The optical plate according to item 1 of the scope of patent application, wherein one of the protrusions has an outer diameter of 200 μm to 500 μm. 如申請專利範圍第1項所述的光學板,其中該些突起部的高度/外徑之一比值範圍為0.01~0.2。The optical plate according to item 1 of the scope of patent application, wherein a ratio of a height / outer diameter of the protrusions ranges from 0.01 to 0.2. 如申請專利範圍第1項所述的光學板,其中該些突起部包含一凹陷部,該凹陷部形成於該突起部的至少兩頂點之間。The optical plate according to item 1 of the patent application scope, wherein the protruding portions include a recessed portion formed between at least two vertices of the protruding portion. 如申請專利範圍第1項所述的光學板,其中該些突起部係具有一曲率半徑於300µm至1000µm之間的曲面。The optical plate according to item 1 of the patent application scope, wherein the protrusions have a curved surface with a radius of curvature between 300 μm and 1000 μm. 如申請專利範圍第1項所述的光學板係由透光性樹脂所組成,其中該透光性樹脂之抗彎模數(Flexural Modulus)大於1GPa。The optical plate according to item 1 of the scope of the patent application is composed of a translucent resin, wherein the flexural modulus of the translucent resin is greater than 1 GPa. 如申請專利範圍第1項所述的光學板,其中該些突起部其中之一係包括: 一凸塊;和 一環狀部,位於該凸塊下方,且該環狀部圍繞並連接該凸塊。The optical plate according to item 1 of the scope of patent application, wherein one of the protrusions includes: A bump; and An annular portion is located below the bump, and the annular portion surrounds and connects the bump. 如申請專利範圍第1項所述的光學板,其中該本體更具有一第二表面與該第一表面相對,其中該第二表面具有一第二中心線平均粗糙度,且該第二中心線平均粗糙度大於該第一中心線平均粗糙度。According to the optical plate of claim 1, wherein the body further has a second surface opposite to the first surface, wherein the second surface has a second centerline average roughness, and the second centerline The average roughness is greater than the first centerline average roughness. 如申請專利範圍第7項所述的光學板,其中該第二中心線平均粗糙度Ra為4 µm ~ 8 µm。The optical plate according to item 7 of the scope of patent application, wherein the average roughness Ra of the second centerline is 4 μm to 8 μm. 一種光學結構,包括: 如申請專利範圍第1~9項中任一項所述的光學板; 一光學膜,設置於該本體之該第一表面之上方;以及 一膠體層,設置於該光學板與該光學膜之間,該膠體層係黏合該些突起部之頂面,且該第一表面與該膠體層之間具有一空氣層。An optical structure including: The optical plate as described in any one of claims 1 to 9 of the scope of patent application; An optical film disposed above the first surface of the body; and A colloid layer is disposed between the optical plate and the optical film. The colloid layer is adhered to the top surfaces of the protrusions, and an air layer is provided between the first surface and the colloid layer. 一種光學結構,包括: 一光學板,包括: 一本體,具有一第一表面;以及 複數個突起部,突出於該第一表面,該突起部的其中一者具有一外徑為200 µm~500 µm與一最大高度為10 µm~35 µm,兩相鄰的該突起部之間具有一間距為0.5 mm~10mm; 一光學膜,設置於該本體的該第一表面的上方;以及 一膠體層,設置於該光學板與該光學膜之間,該膠體層黏合該突起部的頂面,且該第一表面與該膠體層之間具有一空氣層。An optical structure including: An optical plate, including: A body having a first surface; and A plurality of protrusions protrudes from the first surface. One of the protrusions has an outer diameter of 200 µm ~ 500 µm and a maximum height of 10 µm ~ 35 µm. There is a distance between two adjacent protrusions. One pitch is 0.5 mm ~ 10mm; An optical film disposed above the first surface of the body; and A colloid layer is disposed between the optical plate and the optical film. The colloid layer is bonded to the top surface of the protrusion, and an air layer is provided between the first surface and the colloid layer. 如申請專利範圍第11項所述的光學結構,其中該些突起部包含一凹陷部,該凹陷部的一底部與該膠體層之間具有一空氣層。The optical structure according to item 11 of the scope of patent application, wherein the protruding portions include a recessed portion, and an air layer is provided between a bottom of the recessed portion and the colloid layer. 一種背光模組,包括: 一光源;以及 如申請專利範圍第1~9項中任一項所述的光學板或申請專利範圍第10~12項中任一項所述的光學結構,與該光源相對應設置。A backlight module includes: A light source; and The optical plate according to any one of claims 1 to 9 or the optical structure according to any one of claims 10 to 12 of the scope of patent application is provided corresponding to the light source. 一種顯示裝置,包括: 如申請專利範圍第1~9項中任一項所述的光學板或申請專利範圍第10~12項中任一項所述的光學結構,其中,所述顯示裝置系選自於由電視、筆記本個人電腦、移動電腦與用於電腦的監視器所組成之群組。A display device includes: The optical plate according to any one of claims 1 to 9 or the optical structure according to any one of claims 10 to 12, wherein the display device is selected from the group consisting of a television, A group of laptop personal computers, mobile computers, and monitors for computers.
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