TWI396015B - Light guide member, planar light source device provided with the light guide member, and display apparatus using the planar light source device - Google Patents

Light guide member, planar light source device provided with the light guide member, and display apparatus using the planar light source device Download PDF

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TWI396015B
TWI396015B TW095143574A TW95143574A TWI396015B TW I396015 B TWI396015 B TW I396015B TW 095143574 A TW095143574 A TW 095143574A TW 95143574 A TW95143574 A TW 95143574A TW I396015 B TWI396015 B TW I396015B
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light
emitting element
guiding member
light guiding
source device
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TW095143574A
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TW200732788A (en
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Koji Tokita
Takeo Watanabe
Shuichi Naijo
Shuji Gomi
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Showa Denko Kk
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Description

導光構件及具備此導光構件之面光源裝置以及使用該面光源裝置之顯示裝置Light guiding member, surface light source device including the same, and display device using the same

本發明係關於一種導光構件、面光源裝置以及使用該面光源裝置之顯示裝置。更加詳細地說，關於一種例如可以使用作為廣告燈、照明、液晶背光用之光源而能夠將來自發光元件之光呈均勻地擴散．導光至上方的導光構件及具備此導光構件之面光源裝置以及使用該面光源裝置之顯示裝置、例如液晶顯示裝置等之顯示裝置。The present invention relates to a light guiding member, a surface light source device, and a display device using the same. In more detail, for example, a light source for an advertising lamp, an illumination, or a liquid crystal backlight can be used to uniformly diffuse light from a light-emitting element. A light guiding member that guides light upward, a surface light source device including the light guiding member, and a display device using the surface light source device, for example, a display device such as a liquid crystal display device.

[背景技術][Background technique]

在近年來，例如正如液晶顯示器等，將用以由面板之背面或側面等來照射光之面光源裝置(背光)予以使用之顯示裝置呈廣泛地採用。向來，此種液晶顯示器用之背面光源係進行薄型化、低消耗電力化，因此，作為光源而將冷陰極管配置在框體之端面之所謂邊光型係成為主流。In recent years, for example, a liquid crystal display or the like has been widely used as a display device for using a surface light source device (backlight) for illuminating light from the back side or the side surface of a panel. In view of the fact that the back surface light source for such a liquid crystal display is thinned and has low power consumption, a so-called edge light type system in which a cold cathode tube is disposed on an end surface of a casing as a light source has become a mainstream.

作為此種邊光型之背光光源係使用第24圖所示之構造。As the edge light type backlight source, the structure shown in Fig. 24 is used.

也就是說，此邊光型之背光光源100係在框體102之端部，配置冷陰極管104。接著，在此冷陰極管104之側方，呈面狀地配置導光構件106，在此導光構件106之上面，層積擴散薄片108，構成背光光源100。That is, the edge type light source backlight 100 is attached to the end of the casing 102, and the cold cathode tube 104 is disposed. Next, on the side of the cold cathode tube 104, the light guiding member 106 is disposed in a planar shape, and on the upper surface of the light guiding member 106, the diffusion sheet 108 is laminated to constitute the backlight source 100.

此外，在導光構件106之下面，形成例如由微小凹凸或點狀之反射油墨等之所構成之反射部116。Further, on the lower surface of the light guiding member 106, a reflecting portion 116 composed of, for example, minute irregularities or dot-shaped reflective ink is formed.

接著，藉由在此背光光源100之擴散薄片108之上面，層積液晶面板110，而構成液晶顯示裝置112。Next, the liquid crystal panel 110 is laminated on the diffusion sheet 108 of the backlight source 100 to form the liquid crystal display device 112.

藉由在此邊光型之背光光源100，發光冷陰極管104，而使得來自冷陰極管104照射之光，由導光構件106之側部開始入射。By the backlight type light source 100 of this type, the cold cathode tube 104 is illuminated, and the light irradiated from the cold cathode tube 104 is incident from the side of the light guiding member 106.

接著，入射至導光構件106之光係在設置於導光構件106之下面、例如由微小凹凸或點形狀之反射油墨等之所構成之反射部116和導光構件106之上面118之間，重複地進行反射，同時，進行擴散，均勻地導光至導光構件106之上面118之上方。Next, the light incident on the light guiding member 106 is between the reflecting portion 116 formed on the lower surface of the light guiding member 106, for example, by the fine unevenness or the dot-shaped reflective ink, and the upper surface 118 of the light guiding member 106. The reflection is repeated, and at the same time, diffusion is performed to uniformly guide the light above the upper surface 118 of the light guiding member 106.

藉此而均勻地擴散於擴散薄片108，減低液晶面板110之亮度不均。Thereby, the diffusion sheet 108 is uniformly diffused, and the luminance unevenness of the liquid crystal panel 110 is reduced.

但是，液晶顯示器係在近年來，大型化之要求變高，在此種邊光型之背光光源100，在達到亮度之提升及均一化，有限度存在。However, in recent years, liquid crystal displays have become more demanding in terms of large-scale, and backlight light sources 100 of such edge type have limited brightness enhancement and uniformity.

因此，在大型之液晶顯示器用，檢討正下方型光之採用。Therefore, in the case of large-scale liquid crystal displays, review the use of the under-type light.

但是，在使用此種冷陰極管來作為正下方型光之狀態下，冷陰極管係比較大型，因此，液晶顯示器之厚度變厚，並且，冷陰極管係有色再現性及應答性並非良好、產生殘像現象等之問題發生。However, in the state in which such a cold cathode tube is used as the direct-type light, the cold cathode tube is relatively large, and therefore the thickness of the liquid crystal display is increased, and the color reproducibility and response of the cold cathode tube are not good. Problems such as the phenomenon of afterimages occur.

在近年來，發光元件係顯著地提高發光效率，進行對於照明之應用。特別是在使用發光二極體(在以下，稱為「LED」。)來作為液晶顯示器用之背光光源(面光源)之狀態下，期待能夠實現良好之色再現性及高速應答性，達成高品位之畫質。In recent years, light-emitting elements have significantly improved luminous efficiency and have been applied to illumination. In particular, in a state in which a light-emitting diode (hereinafter referred to as "LED") is used as a backlight source (surface light source) for a liquid crystal display, it is expected that good color reproducibility and high-speed response can be achieved. The quality of the taste.

因此，提議在習知之液晶面板之下方，以一定之間隔，來配置複數個之LED之正下方型之背光光源。Therefore, it is proposed to arrange a backlight source of a plurality of LEDs directly below the conventional liquid crystal panel at a certain interval.

作為此正下方型之背光光源係提議第25圖所示之構造者。As the backlight source of this direct type, the constructor shown in Fig. 25 is proposed.

也就是說，此正下方型之背光光源200係在框體202之底面204，以一定之間隔分離而呈縱橫及陣列狀地配置複數個之LED燈206。That is, the backlight type light source 200 of the direct type is attached to the bottom surface 204 of the casing 202, and is separated at a constant interval to arrange a plurality of LED lamps 206 in a vertical and horizontal direction and an array.

接著，在此框體202之上面，以一定之間隔，分離於這些LED燈206，配置擴散薄片208，在此擴散薄片208之上面，層積稜鏡薄片210，構成背光光源200。Next, on the upper surface of the casing 202, the LED lamps 206 are separated at regular intervals, and a diffusion sheet 208 is disposed. The diffusion sheet 208 is stacked on the diffusion sheet 208 to form a backlight source 200.

此外，框體202之底面204和側面212係例如藉由反射薄片等而形成反射部214。Further, the bottom surface 204 and the side surface 212 of the frame body 202 form the reflection portion 214 by, for example, reflecting a sheet or the like.

在像這樣構成之正下方型之背光光源200，藉由發光LED燈206而使得來自LED燈206射出之光，朝向至擴散薄片208，還直接地反射於框體202之底面204和側面212之反射部214，來朝向及進行至擴散薄片208。In the backlight source 200 of the direct type configured as described above, the light emitted from the LED lamp 206 is directed toward the diffusion sheet 208 by the LED lamp 206, and is also directly reflected on the bottom surface 204 and the side surface 212 of the frame 202. The reflecting portion 214 is directed toward and proceeds to the diffusion sheet 208.

接著，入射至擴散薄片208之光係藉由擴散薄片208而進行亂反射，藉由通過擴散薄片208之上面之稜鏡薄片210而使得光線傾斜於垂直方向，入射至配置於稜鏡薄片210上面之並未圖示之液晶面板。Then, the light incident on the diffusion sheet 208 is scattered by the diffusion sheet 208, and the light is obliquely reflected in the vertical direction by the diffusion sheet 210 on the upper surface of the diffusion sheet 208, and is incident on the top sheet 210. A liquid crystal panel not shown.

此外，由LED燈206射出之光係藉由相互地混合在和擴散薄片208間之空間，並且，亂反射於擴散薄片208之內，而促進混合，藉此而使得亮度和色度呈均勻化。Further, the light emitted by the LED lamp 206 is mixed with each other in the space between the diffusion sheet 208 and scattered in the diffusion sheet 208 to promote mixing, thereby making the brightness and chromaticity uniform. .

此外，一般而言，相當於LED燈206之正上方之部分之亮度係變高，因此，可以藉由提高擴散薄片208之LED燈206之正上方部分之擴散度而更加提高亮度之均一化。Further, in general, the brightness corresponding to the portion directly above the LED lamp 206 is increased. Therefore, the uniformity of the brightness can be further improved by increasing the degree of diffusion of the portion directly above the LED lamp 206 of the diffusion sheet 208.

但是，在習知之正下方型之背光光源200，正如前面之敘述，使得亮度和色度呈均一化，因此，設置擴散薄片208，並且，分離LED燈206和擴散薄片208間之距離，達到亮度之均一化，但是，即使是這個，也不充分於解決所謂在LED燈206之正上方部分之亮度變高之問題。However, in the conventional backlight type 200 of the lower type, as described above, the luminance and the chromaticity are made uniform, and therefore, the diffusion sheet 208 is disposed, and the distance between the LED lamp 206 and the diffusion sheet 208 is separated to achieve the brightness. It is uniform, but even this is not sufficient to solve the problem that the brightness of the portion directly above the LED lamp 206 becomes high.

特別是在最近，並非單色之LED，也使用由紅、綠、藍之三原色之LED所構成之複數色(RGB)之LED燈而進行混色，但是，在該狀態下，混色並非充分而看見顏色不均。In particular, recently, LEDs that are not monochromatic colors are mixed with LED lights of multiple colors (RGB) composed of LEDs of three primary colors of red, green, and blue. However, in this state, the color mixture is not sufficient and is seen. The color is uneven.

因此，為了減低亮度不均和顏色不均，所以，正如前面之敘述，提高擴散薄片208之LED燈206之正上方部分之擴散度。Therefore, in order to reduce unevenness in brightness and color unevenness, as described above, the degree of diffusion of the portion directly above the LED lamp 206 of the diffusion sheet 208 is increased.

此外，在專利文獻1(日本特開2001－42782號公報)等，進行將具有光半透過性之灰色印刷層等之所謂「書寫．窗簾」，設置在LED燈之正上方部，降低正上方部之亮度等。In addition, a so-called "writing curtain" having a light-transmissive gray printed layer or the like is placed in the upper portion of the LED lamp, and is lowered directly above. The brightness of the department, etc.

但是，在這些手段，怎麼也降低光之利用效率。However, in these means, how to reduce the efficiency of light utilization.

此外，如果更加增大LED燈206和擴散薄片208間之距離的話，則能夠減低亮度不均和顏色不均，但是，導致背光厚度之增大，例如對於平面板顯示器，變得不適合。Further, if the distance between the LED lamp 206 and the diffusion sheet 208 is further increased, unevenness in brightness and color unevenness can be reduced, but an increase in the thickness of the backlight, for example, for a flat panel display, becomes unsuitable.

因此，在專利文獻2(日本特開平10－82915號公報)，提議第26圖所示之面光源裝置300。The surface light source device 300 shown in Fig. 26 is proposed in the patent document 2 (Japanese Laid-Open Patent Publication No. Hei 10-82915).

也就是說，此面光源裝置300係在構裝LED燈302之發光元件構裝用基板308之上面，在對應於LED燈302之部位，至少在前端部，層積形成LED燈收納凹部304之導光構件306而越進入至深處，來使得幅寬變得越窄。In other words, the surface light source device 300 is formed on the upper surface of the light-emitting element mounting substrate 308 on which the LED lamp 302 is mounted, and at least the front end portion of the LED lamp housing recess 304 is laminated on the portion corresponding to the LED lamp 302. The light guide member 306 enters deeper to make the width narrower.

此外，在此導光構件306之下面310，在除了此LED燈收納凹部304以外之部分，形成反射薄片等之反射部312。Further, on the lower surface 310 of the light guiding member 306, a reflecting portion 312 such as a reflective sheet is formed in a portion other than the LED lamp housing recess 304.

藉此而正如第26圖所示，由LED燈302射出之光B1係在和形成於導光構件306之上面314及下面310之反射部312之間，正如箭號B2所示，重複地進行反射，同時，進行擴散，均勻地導光至導光構件306之上面314之上方。Thereby, as shown in Fig. 26, the light B1 emitted from the LED lamp 302 is interposed between the upper surface 314 of the light guiding member 306 and the reflecting portion 312 of the lower surface 310, as shown by the arrow B2. The reflection, at the same time, is diffused and uniformly guided above the upper surface 314 of the light guiding member 306.

可以藉此而均勻地擴散於並未圖示之設置於導光構件306上面之擴散薄片，防止亮度不均之產生，導光構件306之光射出面之亮度分布呈均勻。By this, it is possible to uniformly diffuse the diffusion sheet provided on the upper surface of the light guiding member 306 (not shown) to prevent unevenness in luminance, and the luminance distribution of the light exit surface of the light guiding member 306 is uniform.

因此，如果藉由此專利文獻2之面光源裝置300的話，則可以比起習知，還更加成為薄型，並無顏色不均，提升亮度。Therefore, according to the surface light source device 300 of Patent Document 2, it can be made thinner than conventional ones, and there is no color unevenness to enhance the brightness.

[專利文獻1]日本特開2001－42782號公報[專利文獻2]日本特開平10－82915號公報[Patent Document 1] JP-A-2001-42782 [Patent Document 2] Japanese Patent Laid-Open No. Hei 10-82915

[發明之揭示][Disclosure of the Invention]

但是，在記載於專利文獻2之面光源裝置300，達到亮度之均一化，但是，正如第26圖所示，在此面光源裝置300，即使是在LED燈302之周圍附近，也藉由反射部312而正如箭號B所示，反射來自LED燈302之光，導光由導光構件306之上面314開始射出至上方。However, in the surface light source device 300 described in Patent Document 2, the brightness is uniformized. However, as shown in Fig. 26, the surface light source device 300 is reflected by the vicinity of the periphery of the LED lamp 302. The portion 312, as indicated by the arrow B, reflects the light from the LED lamp 302, and the light guide is emitted upward from the upper surface 314 of the light guiding member 306.

結果，由導光構件306之LED燈206之正上方部分之上面314開始射出之光量係變大，正如第4圖之圖形之一點鏈線所示，在解決所謂LED燈206之正上方部分之亮度變高之問題，還變得不充分。As a result, the amount of light emitted from the upper surface 314 of the portion directly above the LED lamp 206 of the light guiding member 306 becomes larger, as indicated by the dotted line of the graph of Fig. 4, in the portion directly above the so-called LED lamp 206. The problem of higher brightness has also become insufficient.

本發明係有鑑於此種現狀，其一個目的係提供一種層積在構裝LED等之發光元件之發光元件構裝用基板之上面之導光構件而能夠減低位處於發光元件之正上方部之部分之亮度來使得導光構件之光射出面之亮度分布呈均勻而可以減低亮度之不均和顏色之不均並且光之利用效率變高、成為高亮度而且即使是使用此導光構件之面光源裝置也能夠成為薄型及小型化之導光構件。In view of the above circumstances, it is an object of the present invention to provide a light guiding member which is laminated on a light-emitting element mounting substrate on which a light-emitting element such as an LED is mounted, and which can be reduced in position directly above the light-emitting element. The brightness of the portion is such that the luminance distribution of the light exit surface of the light guiding member is uniform, the unevenness of the brightness and the unevenness of the color can be reduced, and the utilization efficiency of the light becomes high, and the brightness is high, and even the surface of the light guiding member is used. The light source device can also be a thin and miniaturized light guiding member.

此外，本發明之一個目的係提供一種能夠減低該亮度之不均和顏色之不均、光之利用效率變高而成為高亮度、能夠進行薄型及小型化的面光源裝置以及使用此面光源裝置之顯示裝置。Moreover, an object of the present invention is to provide a surface light source device capable of reducing the unevenness of brightness and color unevenness, high light utilization efficiency, and being capable of being thin and small, and using the surface light source device Display device.

本發明人們係為了解決前述之課題，因此，發現本發明之導光構件及具備此導光構件之面光源裝置以及使用該面光源裝置之顯示裝置。In order to solve the above problems, the inventors of the present invention have found a light guiding member of the present invention, a surface light source device including the light guiding member, and a display device using the surface light source device.

也就是說，本發明係包含例如以下之(1)~(16)之形態。That is, the present invention includes, for example, the following forms (1) to (16).

(1)一種導光構件，係配置在構裝發光元件之發光元件構裝用基板之上面而用以擴散來自發光元件之光來導光至上方的導光構件，其特徵為：在並非前述發光元件之周圍附近之前述導光構件之下面，設置光反射部，在前述發光元件之周圍附近之前述導光構件之下面，具有並無設置光反射部之部分。(1) A light guiding member which is disposed on a light-emitting element mounting substrate on which a light-emitting element is mounted and which diffuses light from the light-emitting element to guide light upward, and is characterized in that it is not A light reflecting portion is provided on the lower surface of the light guiding member near the periphery of the light emitting element, and a portion where the light reflecting portion is not provided is provided on the lower surface of the light guiding member in the vicinity of the periphery of the light emitting element.

(2)前述(1)記載之導光構件，其特徵為：在對應於前述導光構件之發光元件之位置，具有發光元件用凹部，在前述發光元件用凹部之凹面之某一部分，設置光半透過部。(2) The light guiding member according to the above aspect (1), wherein the light-emitting element has a concave portion at a position corresponding to the light-emitting element of the light guiding member, and a light is provided in a concave portion of the concave portion of the light-emitting element. Semi-transmission section.

(3)前述(2)記載之導光構件，其特徵為：前述凹面之光半透過部係設置在前述發光元件之上方。(3) The light guiding member according to (2), wherein the light semi-transmissive portion of the concave surface is provided above the light emitting element.

(4)前述(1)至(3)中任何一項所記載之導光構件，其特徵為：前述發光元件之周圍附近區域係由發光元件開始至均勻之距離為止之區域。(4) The light guiding member according to any one of (1) to (3), wherein the vicinity of the periphery of the light-emitting element is a region from the light-emitting element to a uniform distance.

(5)前述(1)至(4)中任何一項所記載之導光構件，其特徵為：構成在前述發光元件之周圍附近區域，形成點形狀之光反射部，越加接近發光元件而使得點密度越加變低。(5) The light guiding member according to any one of (1) to (4), wherein a light reflecting portion having a dot shape is formed in a vicinity of a periphery of the light emitting element, and the light emitting element is closer to the light emitting element. Make the point density become lower and lower.

(6)前述(1)記載之導光構件，其特徵為：在對應於前述導光構件之上面之發光元件之位置，設置光半透過部。(6) The light guiding member according to (1) above, wherein the light semi-transmissive portion is provided at a position corresponding to the light-emitting element on the upper surface of the light guiding member.

(7)前述(6)記載之導光構件，其特徵為：前述之光半透過部係形成在前述導光構件之上面之發光元件之正上方之位置。(7) The light guiding member according to (6), wherein the light semi-transmissive portion is formed at a position directly above the light-emitting element on the upper surface of the light guiding member.

(8)前述(7)記載之導光構件，其特徵為：前述之光半透過部係在前述導光構件之上面，由發光元件開始至均勻之距離為止而設置在發光元件之周圍附近。(8) The light guiding member according to (7), wherein the light semi-transmissive portion is provided on the upper surface of the light guiding member, and is provided in the vicinity of the periphery of the light emitting element from the light emitting element to a uniform distance.

(9)前述(1)至(8)中任何一項所記載之導光構件，其特徵為：構裝於前述發光元件構裝用基板之發光元件係離開而設置複數個，在對應於這個之複數個之前述導光構件之下面位置，具有並無設置前述光反射部之發光元件之周圍附近區域。(9) The light guiding member according to any one of the above (1) to (8), wherein the light-emitting elements that are mounted on the substrate for the light-emitting element are separated from each other and are provided in plurality, corresponding to this The lower surface of the plurality of light guiding members has a region in the vicinity of the periphery of the light-emitting element in which the light reflecting portion is not provided.

(10)前述(9)記載之導光構件，其特徵為：在前述複數個發光元件之所鄰接之發光元件之離開間隔成為D而由一直到並無設置前述光反射部之發光元件之周圍附近區域外圍端部為止之發光元件開始之均勻之距離成為d之時，成為D/4≧d。(10) The light guiding member according to (9), wherein a distance between the adjacent light-emitting elements of the plurality of light-emitting elements is D, and the light-emitting elements are not provided until the light-reflecting portion is not provided. When the uniform distance from the light-emitting element at the peripheral end portion of the vicinity is d, it becomes D/4≧d.

(11)前述(1)至(10)中任何一項所記載之導光構件，其特徵為：構裝於前述發光元件構裝用基板之發光元件係由組合不同之發光色之複數種類之發光元件之單位發光元件而構成，對應於前述之單位發光元件而具有並無設置前述光反射部之發光元件之周圍附近區域。(11) The light guiding member according to any one of the above (1) to (10), wherein the light-emitting element mounted on the substrate for the light-emitting element assembly is composed of a plurality of types of different luminescent colors. The unit light-emitting element of the light-emitting element is configured to have a region around the periphery of the light-emitting element in which the light-reflecting portion is not provided, in accordance with the unit light-emitting element.

(12)前述(2)至(5)中任何一項所記載之導光構件，其特徵為：構裝於前述發光元件構裝用基板之發光元件係由組合不同之發光色之複數種類之發光元件之單位發光元件而構成，對應於前述之單位發光元件而形成發光元件用凹部。The light guide member according to any one of the above aspects of the present invention, characterized in that the light-emitting element mounted on the substrate for the light-emitting element assembly is composed of a plurality of different combinations of luminescent colors. The unit light-emitting element of the light-emitting element is configured to form a light-emitting element recess corresponding to the unit light-emitting element described above.

(13)一種面光源裝置，其特徵為：在構裝發光元件之發光元件構裝用基板之上面，配置前述(1)至(12)中任何一項所記載之導光構件。(13) A surface light source device according to any one of the above (1) to (12), wherein the light-emitting element assembly substrate is mounted on the light-emitting element assembly substrate.

(14)前述(13)記載之面光源裝置，其特徵為：前述之發光元件係發光二極體。(14) The surface light source device according to (13) above, wherein the light-emitting element is a light-emitting diode.

(15)一種顯示裝置，其特徵為：在前述(13)或(14)中任何一項所記載之面光源裝置之上面，配置顯示部。(15) A display device, wherein the display unit is disposed on the upper surface of the surface light source device according to any one of (13) or (14).

(16)前述(15)記載之顯示裝置，其特徵為：前述之顯示部係液晶面板。(16) The display device according to (15) above, wherein the display unit is a liquid crystal panel.

如果藉由本發明之導光構件的話，則藉由在並非發光元件之周圍附近之前述導光構件之下面，設置光反射部，在前述發光元件之周圍附近之前述導光構件之下面，具有並無設置光反射部之部分，而構成導光構件之發光元件周圍附近之導光構件下面之朝向於上方之擴散強度，更加小於具有其外圍側部分之光反射部之導光構件下面之朝向於上方之擴散強度，因此，能夠使得位處於發光元件之正上方部之部分之亮度變低，導光構件之光射出面之亮度分布呈均勻，可以減低亮度之不均和顏色之不均，光之利用效率也變高而成為高亮度。According to the light guiding member of the present invention, the light reflecting portion is provided on the lower surface of the light guiding member that is not in the vicinity of the periphery of the light emitting element, and is provided on the lower surface of the light guiding member near the periphery of the light emitting element. The portion of the light-reflecting portion is not provided, and the diffusion intensity of the lower surface of the light-guiding member in the vicinity of the light-emitting element constituting the light-guiding member is smaller than that of the light-reflecting member having the light-reflecting portion of the peripheral portion thereof. The diffusion intensity of the upper portion can lower the brightness of the portion of the light-emitting element directly above the light-emitting element, and the brightness distribution of the light-emitting surface of the light-guiding member is uniform, which can reduce the unevenness of the brightness and the unevenness of the color. The utilization efficiency is also high and becomes high brightness.

此外，如果藉由本發明之某一實施形態的話，則在對應於導光構件上面之發光元件之位置，設置光半透過部，或者是在導光構件，設置發光元件用凹部，在該發光元件用凹部之凹面，將具有反射及擴散光之作用之光半透過部予以設置，因此，藉由該光半透過部而擴散及反射來自發光元件之光，能夠抑制位處於發光元件之正上方部之部分之亮度變高，可以使得導光構件之光射出面之亮度分布呈均勻，可以減低亮度之不均和顏色之不均，光之利用效率也變高而成為高亮度。Further, according to an embodiment of the present invention, a light semi-transmissive portion is provided at a position corresponding to a light-emitting element on a light guiding member, or a light-emitting member concave portion is provided in the light guiding member. Since the light semi-transmissive portion having the function of reflecting and diffusing light is provided by the concave surface of the concave portion, the light from the light-emitting element is diffused and reflected by the light semi-transmissive portion, and the position of the light-emitting element can be suppressed from being directly above the light-emitting element. When the brightness of the portion is increased, the brightness distribution of the light exit surface of the light guiding member can be made uniform, the unevenness of the brightness and the unevenness of the color can be reduced, and the light use efficiency is also high to become high brightness.

並且，在使用該導光構件來作為面光源裝置之狀態下，可以使得亮度分布呈均勻，能夠減低亮度之不均和顏色之不均，光之利用效率也變高而成為高亮度，並且，可以進行薄型及小型化。Further, in a state in which the light guiding member is used as the surface light source device, the luminance distribution can be made uniform, unevenness in brightness and unevenness in color can be reduced, and light use efficiency is also increased to become high luminance, and It can be thin and miniaturized.

此外，如果藉由使用此種導光構件之面光源裝置的話，則降低發光元件之正上方部之亮度，因此，涵蓋面光源裝置之整個面而使得亮度呈均勻，成為高亮度，也並無產生顏色之不均，色度變得均勻。Further, if the surface light source device of such a light guiding member is used, the brightness of the portion directly above the light emitting element is lowered, so that the entire surface of the surface light source device is covered to make the brightness uniform and high brightness, and there is no The color is uneven and the chromaticity becomes uniform.

因此，如果以此種面光源裝置作為顯示裝置、特別是作為液晶顯示器之背光而使用本發明之面光源裝置的話，則能夠得到薄型且高畫質之顯示裝置。Therefore, when the surface light source device of the present invention is used as a display device, particularly as a backlight of a liquid crystal display, a thin and high-quality display device can be obtained.

[發明之最佳實施形態][Best Embodiment of the Invention]

在以下，根據圖式而更加詳細地說明本發明之實施形態。Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.

第1圖係顯示適用本實施形態之液晶顯示裝置之某一例子之整體構造之圖。適用本實施形態之液晶顯示裝置係具備：作為正下方型之面光源裝置(背光)50而收納發光部之背光幀框(框體)51以及配列複數個之作為發光源之成為固體發光元件之發光二極體(LED)53而作為基板之LED基板(構裝基板)52。此外，背光裝置50係在LED基板(構裝基板)52之上，具備收納於背光幀框(框體)51內之成為本發明特徵之導光構件(板、薄片)54。Fig. 1 is a view showing an overall configuration of a certain example of a liquid crystal display device to which the present embodiment is applied. The liquid crystal display device of the present embodiment is provided with a backlight frame frame (frame) 51 that houses a light-emitting portion as a direct-surface type light source device (backlight) 50, and a plurality of light-emitting elements that are arranged as light-emitting elements. A light-emitting diode (LED) 53 serves as an LED substrate (configuration substrate) 52 of the substrate. Further, the backlight device 50 is provided on the LED substrate (configuration substrate) 52, and includes a light guiding member (plate, sheet) 54 which is housed in the backlight frame (frame) 51 and which is a feature of the present invention.

和第25圖所示之習知之正下方型背光裝置之不同係在發光二極體和擴散構件(板)之空間來介在導光構件之方面，並無增加背光之厚度，寧可能夠縮小發光二極體和擴散構件(板)之間隔。在導光構件之上，具備：作為光學補償薄片之層積體來進行散亂．擴散光而用以使得面整體成為均勻之明亮度之擴散構件(板、薄片)55以及成為具有集光至前方之集光效果之繞射格子薄膜之稜鏡薄片56、57。此外，作為液晶顯示模組60係具備：藉由2片之玻璃基板而夾住液晶之液晶面板61以及層積於此液晶面板61之各個玻璃基板而用以限制光波之振動於某方向之偏光板(偏光濾光片)62、63。此外，在液晶顯示裝置，配置並未圖示之驅動用LSI等之周邊構件。Different from the conventional under-type backlight device shown in FIG. 25, in the space of the light-emitting diode and the diffusion member (plate), the thickness of the backlight is not increased in the space of the light-guiding member, and it is preferable to reduce the brightness of the light-emitting device. The spacing between the polar body and the diffusing member (plate). On the light guiding member, there is provided a layered body as an optical compensation sheet for scattering. A diffusion member (plate, sheet) 55 for diffusing light to make the entire surface uniform, and a ruthenium sheet 56, 57 which is a diffraction grating film having a light collecting effect for collecting light to the front. In addition, the liquid crystal display module 60 includes a liquid crystal panel 61 in which liquid crystal is sandwiched by two glass substrates, and a glass substrate laminated on the liquid crystal panel 61 to restrict polarization of light waves in a certain direction. Plates (polarizing filters) 62, 63. Further, in the liquid crystal display device, peripheral members such as a driving LSI (not shown) are disposed.

此液晶面板61係包含並未圖示之各種構成要素而構成。例如在2片之玻璃基板，具備並未圖示之顯示電極、薄膜電晶體(TFT：Thin Film Transistor)等之主動元件、液晶、間隔件、密封劑、配向膜、共通電極、保護膜、彩色濾光片等。This liquid crystal panel 61 is comprised by the various components which are not shown in figure. For example, two glass substrates include a display electrode (not shown), an active element such as a thin film transistor (TFT: Thin Film Transistor), a liquid crystal, a spacer, a sealant, an alignment film, a common electrode, a protective film, and color. Filters, etc.

此外，背光裝置50之構成單位係任意地選擇。例如也可以有藉由僅具有LED基板52之背光幀框51之單位而稱為「背光裝置(背光)」、不包含擴散構件53或稜鏡薄片54、55等之光學補償薄片之層積體之流通形態。Further, the constituent units of the backlight device 50 are arbitrarily selected. For example, there may be a laminate of an optical compensation sheet which is called a "backlight device (backlight)" by a unit having only the backlight frame 51 of the LED substrate 52, and an optical compensation sheet which does not include the diffusion member 53 or the crucible sheets 54, 55 or the like. The form of circulation.

背光幀框51係形成例如藉由鋁或鎂、鐵或者是這些之金屬合金等之所生成之框體構造。接著，在該框體構造之內側，貼附例如具有白色高反射之性能之聚酯薄膜等，具備作為反射鏡之功能。作為此框體構造係具備：對應於液晶顯示模組60之大小而設置之背面部以及包圍此背面部之四個角落之側面部。此外，有在此背面部或側面部，由於需要而形成由散熱用之冷卻扇等之所構成之散熱片構造之狀態發生。The backlight frame 51 is formed into a frame structure formed by, for example, aluminum or magnesium, iron, or a metal alloy of these. Next, a polyester film having a white high-reflection property or the like is attached to the inside of the frame structure, and functions as a mirror. The frame structure includes a back surface portion that is provided corresponding to the size of the liquid crystal display module 60, and a side surface portion that surrounds the four corners of the back surface portion. Further, in the back surface portion or the side surface portion, a state in which a heat sink structure including a cooling fan for heat dissipation or the like is formed is required.

第2圖係顯示適用本發明之導光構件之本發明之面光源裝置之第1實施形態之俯視圖，第3圖係在第2圖之A－A線之部分擴大剖面圖。Fig. 2 is a plan view showing a first embodiment of the surface light source device of the present invention to which the light guiding member of the present invention is applied, and Fig. 3 is a partially enlarged cross-sectional view taken along line A-A of Fig. 2;

在第2圖及第3圖，圖號10係表示在整體之本發明之面光源裝置。In Fig. 2 and Fig. 3, Fig. 10 shows the surface light source device of the present invention as a whole.

本發明之面光源裝置10係正如第3圖所示，具備發光元件構裝用基板12，在此發光元件構裝用基板12之上面，例如構裝由LED等之所構成之發光元件14。The surface light source device 10 of the present invention includes a light-emitting element mounting substrate 12 as shown in Fig. 3. On the upper surface of the light-emitting element mounting substrate 12, for example, a light-emitting element 14 composed of an LED or the like is mounted.

此發光元件14係在發光元件構裝用基板12之上面，正如第2圖所示，以一定之間隔分離而呈縱橫及陣列狀地配置複數個之發光元件14。The light-emitting elements 14 are placed on the upper surface of the light-emitting element mounting substrate 12, and as shown in Fig. 2, a plurality of light-emitting elements 14 are arranged in a vertical and horizontal direction and an array in a predetermined interval.

接著，在此發光元件構裝用基板12之上面，配置由透明樹脂等之所構成之導光構件16。在此導光構件16，正如第3圖所示，在導光構件16之下面18，在對應於發光元件14之位置，形成發光元件收納用凹部20，在此發光元件收納用凹部20內，收納發光元件14。Next, on the upper surface of the light-emitting element mounting substrate 12, a light guiding member 16 made of a transparent resin or the like is disposed. In the light guide member 16, as shown in FIG. 3, a light-emitting element housing recess 20 is formed in the lower surface 18 of the light guiding member 16 at a position corresponding to the light-emitting element 14, and the light-emitting element housing recess 20 is provided in the light-emitting element housing recess 20, The light emitting element 14 is housed.

此外，作為此發光元件收納用凹部20之形狀係可以適度地變化成為圓頂形狀、半球狀、圓錐形狀等。In addition, the shape of the light-emitting element housing recess 20 can be appropriately changed to a dome shape, a hemispherical shape, a conical shape, or the like.

此外，並無圖示，但是，在此發光元件構裝用基板12，例如形成銅等之配線圖案，藉此而控制發光元件14之發光。Further, although not shown, the light-emitting element mounting substrate 12 is formed with, for example, a wiring pattern such as copper, thereby controlling the light emission of the light-emitting element 14.

此外，構成導光構件16係藉由將在並非發光元件14之周圍附近之導光構件16之下面設置光反射部22、在前述發光元件14之周圍附近之前述導光構件16之下面並無設置光反射部22之部分予以具有，而使得朝向於發光元件14周圍附近之導光構件16下面之上方之擴散強度，還更加小於朝向至具有該外圍側部分之光反射部22之導光構件16下面之上方之擴散強度。Further, the light guiding member 16 is formed such that the light reflecting portion 22 is provided on the lower surface of the light guiding member 16 which is not in the vicinity of the periphery of the light emitting element 14, and is not under the light guiding member 16 in the vicinity of the periphery of the light emitting element 14. The portion in which the light reflecting portion 22 is provided is provided such that the diffusion intensity above the lower surface of the light guiding member 16 in the vicinity of the periphery of the light emitting element 14 is further smaller than the light guiding member toward the light reflecting portion 22 having the peripheral side portion. The diffusion intensity above the bottom of 16.

也就是說，在此實施形態，正如第2圖及第3圖所示，在導光構件16之下面18，在除了發光元件14之周圍附近以外之概略整個面，例如設置由白色塗料等之所構成之光反射部22。In other words, in this embodiment, as shown in Figs. 2 and 3, on the lower surface 18 of the light guiding member 16, for example, a white paint or the like is provided on the entire surface except for the vicinity of the periphery of the light-emitting element 14. The light reflecting portion 22 is configured.

也就是說，正如第26圖所示，在習知之面光源裝置300，即使是在LED燈302之周圍附近，也藉由反射部312，而正如箭號B所示，反射來自LED燈302之光，導光由導光構件306之上面314開始擴散及反射至上方。That is, as shown in Fig. 26, in the conventional surface light source device 300, even in the vicinity of the periphery of the LED lamp 302, the reflection portion 312, as indicated by the arrow B, reflects from the LED lamp 302. Light, the light guide is diffused and reflected upward by the upper surface 314 of the light guiding member 306.

結果，正如第4圖之圖形之一點鏈線所示，在習知之面光源裝置300，由導光構件306之LED燈302之正上方部分之上面314射出之光量係變大，LED燈302之正上方部分之亮度變高。As a result, as shown by the dotted line of the graph of Fig. 4, in the conventional surface light source device 300, the amount of light emitted from the upper surface 314 of the portion directly above the LED lamp 302 of the light guiding member 306 becomes larger, and the LED lamp 302 is The brightness of the upper portion becomes higher.

相對於這個，如果藉由此實施形態之面光源裝置10的話，則在發光元件14之周圍附近，並無設置光反射部22，因此，正如第3圖之箭號C所示，來自發光元件14之光係在發光元件14之周圍附近，藉由導光構件16之下面18而進行正反射(全反射)，僅導光於導光構件16之上面26和下面18之間，由導光構件16之上面26開始，並無擴散及反射於上方而進行導光。With respect to this, according to the surface light source device 10 of the embodiment, the light reflecting portion 22 is not provided in the vicinity of the periphery of the light-emitting element 14, and therefore, as shown by the arrow C of FIG. 3, the light-emitting element is provided. The light of 14 is near the periphery of the light-emitting element 14 and is normally reflected (total reflection) by the lower surface 18 of the light guiding member 16, and is guided only between the upper surface 26 and the lower surface 18 of the light guiding member 16 by the light guiding light. The upper surface 26 of the member 16 begins to conduct light without diffusion and reflection.

接著，正如第3圖之箭號C所示，到達至光反射部22之光係藉由進行擴散及反射而朝向至導光構件16之上方，來進行擴散及反射。Next, as indicated by the arrow C in FIG. 3, the light reaching the light reflecting portion 22 is diffused and reflected toward the upper side of the light guiding member 16 by diffusion and reflection.

藉此而正如前面之敘述，構成朝向於發光元件14周圍附近之導光構件16下面之上方之擴散強度係更加小於朝向至該外圍側部分之導光構件16下面之上方之擴散強度。Thereby, as described above, the diffusion strength of the upper portion of the light guiding member 16 which is formed toward the vicinity of the periphery of the light-emitting element 14 is made smaller than the diffusion intensity toward the upper side of the light guiding member 16 to the peripheral side portion.

藉此而正如第4圖之圖形之點線所示，發光元件14之正上方附近之亮度係更加減少於習知之背光光源，其外部之亮度係更加增加於習知之背光光源，達到亮度之均一化。Thereby, as shown by the dotted line of the graph of FIG. 4, the brightness near the upper side of the light-emitting element 14 is further reduced to the conventional backlight source, and the external brightness is further increased to the conventional backlight source to achieve uniform brightness. Chemical.

在此狀態下，並無設置光反射部22之發光元件14周圍附近區域之形狀係正如此實施形態，由發光元件14開始至均一之距離為止、也就是成為圓形狀，但是，並非限定於此形狀，正如第5圖所示，可以成為橢圓形狀(第5(A)圖)、矩形狀(第5(B)圖)、三角形狀(第5(C)圖)、拱形狀(第5(D)圖)、多角形狀等之其他形狀。In this state, the shape of the vicinity of the vicinity of the light-emitting element 14 where the light-reflecting portion 22 is not provided is such a configuration, and the light-emitting element 14 is rounded up to a uniform distance, but is not limited thereto. The shape, as shown in Fig. 5, can be an elliptical shape (5th (A)), a rectangular (5th (B)), a triangular (5th (C)), and an arch (5th) D) Figure), other shapes such as polygonal shapes.

此外，作為並無設置光反射部22之發光元件14之周圍附近區域24、也就是正如第3圖所示、由發光元件14之中心開始至周圍附近區域24之外圍端部為止之距離d1係可以配合於發光元件14之種類、亮度、導光構件16之種類、厚度、光反射部22之種類、膜厚等而正如第4圖之實線之圖形所示，設定成為幾乎均勻之亮度，並無特別限制。Further, as a region near the periphery 24 of the light-emitting element 14 where the light reflecting portion 22 is not provided, that is, as shown in Fig. 3, the distance d1 from the center of the light-emitting element 14 to the peripheral end portion of the peripheral region 24 is The type of the light-emitting element 14, the brightness, the type and thickness of the light-guiding member 16, the type of the light-reflecting portion 22, the film thickness, and the like can be set to be almost uniform brightness as shown by the solid line in FIG. There are no special restrictions.

例如在發光元件14成為LED、導光構件16成為透明樹脂板、厚度3mm、光反射部22成為白色塗裝、厚度5 μm~100 μm之狀態下，由發光元件14開始至周圍附近之外圍端部為止之距離d1係可以成為40mm程度。For example, when the light-emitting element 14 is an LED, the light-guiding member 16 is a transparent resin plate, the thickness is 3 mm, the light-reflecting portion 22 is white-coated, and the thickness is 5 μm to 100 μm, the light-emitting element 14 starts to the peripheral end near the periphery. The distance d1 from the part can be about 40 mm.

此外，正如第2圖所示，在複數個之發光元件14相鄰接之發光元件之離開間隔成為D而由發光元件14之中心開始至周圍附近區域24之外圍端部為止之均一之距離成為d1之時，最好是D/4≧d1。Further, as shown in Fig. 2, the uniform distance between the light-emitting elements adjacent to the plurality of light-emitting elements 14 is D, and the uniform distance from the center of the light-emitting element 14 to the peripheral end portion of the peripheral region 24 is When d1 is used, it is preferably D/4≧d1.

作為發光元件14係並無特別限定，但是，例如作為液晶顯示器之背光光源用係LED能夠實現良好之色再現性和高速應答性，可以達成高品位之畫質，因此，變得理想。The light-emitting element 14 is not particularly limited. For example, the LED for backlight source of a liquid crystal display can achieve good color reproducibility and high-speed response, and can achieve high-quality image quality.

此外，作為LED係可以使用單色之LED，但是，可以使用組合不同發光色之複數種類之發光元件14之單位發光元件、例如紅、綠、藍之三原色之LED晶片、也就是發光於紅色之LED晶片R、發光於綠色之LED晶片G、發光於藍色之LED晶片B，適度地使用藉由這些之混色而而發光白色之所謂三合一形式之封裝。Further, as the LED system, a single-color LED can be used, but a unit light-emitting element of a plurality of types of light-emitting elements 14 of different illuminating colors, for example, LED chips of three primary colors of red, green, and blue, that is, light-emitting red can be used. The LED chip R, the green LED chip G, and the blue LED chip B are appropriately packaged in a so-called three-in-one type in which white color is emitted by these mixed colors.

此外，作為發光元件14係也可以使用藉由模鑄樹脂而對於LED進行樹脂密封之模鑄封裝品或者是在LED之上面具備半球狀之透鏡者。Further, as the light-emitting element 14, a molded package in which the LED is resin-sealed by molding resin or a lens having a hemispherical shape on the LED may be used.

正如三合一形式，也在組合及使用不同發光色之複數種類之發光元件14之狀態下，正如第6圖所示，發光元件14之周圍附近區域24係可以配合於這些LED晶片之配置形狀而正如第2圖之實施形態所示，除了圓形狀以外，還成為橢圓形狀(第6(A)圖)、矩形狀(第6(B)圖)、三角形狀(第6(C)圖)、拱形狀(第6(D)圖)之多角形狀等之其他形狀。As in the three-in-one form, in the state in which a plurality of types of light-emitting elements 14 of different illuminating colors are combined and used, as shown in Fig. 6, the vicinity 24 of the vicinity of the light-emitting elements 14 can be fitted to the arrangement shapes of the LED chips. As shown in the embodiment of Fig. 2, in addition to the circular shape, it has an elliptical shape (Fig. 6(A)), a rectangular shape (6th (B)), and a triangular shape (6th (C)). Other shapes such as the polygonal shape of the arch shape (Fig. 6(D)).

此外，在此狀態下，並無圖示，但是，作為單位發光元件係正如前面之敘述，也除了藉由R、G、B之分別各1個而成為1單位以外，例如藉由R1個、G2個、B1個而成為1單位者、藉由R2個、G2個、B1個而成為1單位者等，特別是其組合係並無限定。In addition, although it is not shown in this state, as a unit light-emitting element, as described above, it is one unit other than R, G, and B, for example, by R1. G2 and B1 are one unit, and R2, G2, and B1 are one unit, and the combination is not limited.

此外，作為單位發光元件係正如前面之敘述，並無限定在藍、綠、紅之3色，例如也可以將黃、橙、藍綠等之所謂中間色之LED晶片，設置在同一基板上，成為4色、5色等。In addition, as a unit light-emitting element, as described above, it is not limited to three colors of blue, green, and red. For example, an LED chip of a so-called intermediate color such as yellow, orange, or blue-green may be provided on the same substrate. 4 colors, 5 colors, etc.

此外，作為導光構件16係如果是傳播光的話，則並無特別限定，例如可以使用丙烯樹脂、聚碳酸酯樹脂、液晶聚合物、聚苯乙烯樹脂等。可以藉由單獨或層積厚度比較厚之板狀或者是比較薄之薄片狀者而適度地使用。In addition, the light guiding member 16 is not particularly limited as long as it transmits light, and for example, an acrylic resin, a polycarbonate resin, a liquid crystal polymer, a polystyrene resin or the like can be used. It can be used moderately by laminating a thick plate or a relatively thin flake.

此外，發光元件收納用凹部20之形狀係也並無特別限定，例如可以採用圓錐、角錐、圓柱、角柱、半球狀等。In addition, the shape of the light-emitting element housing recess 20 is not particularly limited, and for example, a cone, a pyramid, a cylinder, a corner column, a hemispherical shape, or the like can be used.

此外，作為光反射部22係並無特別限定，可以使用例如鋁箔等之金屬箔、鋁、金、銀、白金等之金屬薄膜、白色油墨等。Further, the light reflecting portion 22 is not particularly limited, and for example, a metal foil such as aluminum foil, a metal film such as aluminum, gold, silver or platinum, or a white ink can be used.

在此狀態下，在鋁箔等之金屬箔之狀態，可以藉由透明接著劑而進行貼附。此外，在鋁、金、銀、白金等之金屬薄膜之狀態下，可以藉由例如蒸鍍、濺鍍、無電解電鍍等之方法而形成。此外，作為白色油墨係可以使用例如含二氧化鈦之丙烯樹脂等，可以藉由分配器、噴射塗裝、粉體塗裝、滾壓塗敷器、帷簾流動塗敷器、毛刷塗敷等之方法而進行塗敷。In this state, in the state of the metal foil such as aluminum foil, it can be attached by a transparent adhesive. Further, in the state of a metal thin film such as aluminum, gold, silver or platinum, it can be formed by a method such as vapor deposition, sputtering, electroless plating or the like. Further, as the white ink, for example, a titanium oxide-containing acryl resin or the like may be used, and it may be a dispenser, a spray coating, a powder coating, a roll coater, a curtain flow applicator, a brush coating or the like. The method is applied.

即使是在這些當中，使用白色油墨之塗敷者係如果是考慮操作性等的話，則最好是簡便。Even among these, it is preferable that the applicator using white ink is operability or the like.

在此狀態下，作為白色油墨之厚度係如果是考慮光反射效果的話，則最好是5 μm~100 μm。In this state, the thickness of the white ink is preferably 5 μm to 100 μm in consideration of the light reflection effect.

此外，也可以在白色油墨，混入樹脂顆粒、玻璃顆粒等之光擴散劑而提高光擴散率。Further, in the white ink, a light diffusing agent such as resin particles or glass particles may be mixed to increase the light diffusivity.

此外，正如第7圖所示之第2實施形態，為了取代在導光構件16之側設置發光元件收納用凹部20，因此，也可以在發光元件構裝用基板12之側，設置發光元件收納用凹部28，在發光元件構裝用基板12和導光構件16之間，透過絕緣層21而設置反射鏡30。Further, in the second embodiment shown in Fig. 7, in order to provide the light-emitting element housing recess 20 on the side of the light guiding member 16, the light-emitting element housing may be provided on the side of the light-emitting element mounting substrate 12. The mirror 30 is provided through the insulating layer 21 between the light-emitting element mounting substrate 12 and the light guiding member 16 by the concave portion 28.

此外，在此實施形態，在發光元件構裝用基板12之上面，以一定之間隔分離而呈縱橫及陣列狀地配置複數個之發光元件14，但是，此發光元件14之數目(當然也可以是1個)、其配置形狀係並無特別限定，可以適度地變化例如配置成為同心圓狀、千鳥狀等。In addition, in this embodiment, a plurality of light-emitting elements 14 are arranged in a vertical, horizontal, and array shape on the upper surface of the light-emitting element mounting substrate 12 at regular intervals. However, the number of the light-emitting elements 14 (of course, The arrangement shape is not particularly limited, and may be appropriately changed, for example, to be concentric, or a thousand birds.

像這樣構成之本發明之面光源裝置10係使用作為廣告燈、照明、液晶背光用之光源等，例如可以在使用作為液晶用背光之狀態下，正如第1圖所示，在導光構件16之上面，透過擴散薄片、稜鏡薄片等而配置液晶面板，來成為液晶顯示裝置。The surface light source device 10 of the present invention configured as described above is used as a light source for an advertising lamp, illumination, or liquid crystal backlight. For example, in a state in which a backlight for liquid crystal is used, as shown in FIG. 1, the light guiding member 16 is used. On the upper surface, a liquid crystal panel is placed through a diffusion sheet, a ruthenium sheet, or the like to form a liquid crystal display device.

第8圖係顯示適用本發明之其他實施形態之導光構件之本發明之面光源裝置之第3實施形態之俯視圖，第9圖係在第8圖之A－A線之部分擴大剖面圖。Fig. 8 is a plan view showing a third embodiment of the surface light source device of the present invention to which the light guiding member according to another embodiment of the present invention is applied, and Fig. 9 is a partially enlarged cross-sectional view taken along line A-A of Fig. 8.

此實施形態之面光源裝置10係在基本上，相同於第2圖及第3圖所示之面光源裝置10之同樣構造，在相同之構成構件，附加相同之參考圖號，省略其詳細說明。The surface light source device 10 of the embodiment is basically the same as the surface light source device 10 shown in FIGS. 2 and 3, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. .

在此實施形態之面光源裝置10，正如第8圖及第9圖所示，還在對應於導光構件16上面之發光元件14之位置、也就是在包含呈正上方地投影發光元件14之正上方之區域，具有圓形狀之光半透過部32。In the surface light source device 10 of this embodiment, as shown in Figs. 8 and 9, the position of the light-emitting element 14 corresponding to the light-conducting member 16 is also positively projected, that is, the light-emitting element 14 is projected directly above. The upper region has a circular light transmissive portion 32.

在此狀態下，作為光半透過部32之形狀係並無特別限定，正如此實施形態，成為圓形狀而由發光元件14開始至均一之距離為止，成為光半透過部32，並無限定在此形狀，並無圖示，但是，相同於發光元件14之周圍附近區域24之形狀，可以成為橢圓形狀、矩形狀、三角形狀、拱形狀、多角形狀等之其他形狀。In this state, the shape of the light semi-transmissive portion 32 is not particularly limited. In this embodiment, the light semi-transmissive portion 32 is not limited to the circular shape and is formed by the light-emitting element 14 to a uniform distance. Although the shape is not shown, the shape of the region 24 near the periphery of the light-emitting element 14 may be other shapes such as an elliptical shape, a rectangular shape, a triangular shape, an arch shape, and a polygonal shape.

此外，作為光半透過部、也就是正如第9圖所示、由發光元件14開始至光半透過部32之外圍端部為止之距離d2係可以配合於發光元件14之種類、亮度、導光構件16之種類、厚度、光反射部22之種類、膜厚、由發光元件14開始至發光元件14之周圍附近區域24之外圍端部為止之距離d1等而正如第4圖之實線之圖形所示，設定成為幾乎均勻之亮度，並無特別限制。Further, as the light semi-transmissive portion, that is, as shown in Fig. 9, the distance d2 from the light-emitting element 14 to the peripheral end portion of the light semi-transmissive portion 32 can be matched with the type, brightness, and light guide of the light-emitting element 14. The type and thickness of the member 16, the type of the light reflecting portion 22, the film thickness, the distance d1 from the light-emitting element 14 to the peripheral end portion of the region 24 near the periphery of the light-emitting element 14, and the like, as shown by the solid line in FIG. As shown, the brightness is set to be almost uniform, and is not particularly limited.

例如在發光元件14成為LED、導光構件16成為透明樹脂板、厚度3mm、光反射部22成為白色塗裝、厚度5 μm~100 μm之狀態下，在由發光元件14開始至發光元件14之周圍附近區域24之外圍端部為止之距離d1成為40mm之狀態，作為由發光元件開始之距離d2係最好是2mm~30mm。For example, when the light-emitting element 14 is an LED, the light-guiding member 16 is a transparent resin plate, the thickness is 3 mm, the light-reflecting portion 22 is white-coated, and the thickness is 5 μm to 100 μm, the light-emitting element 14 starts to the light-emitting element 14 . The distance d1 from the peripheral end portion of the surrounding area 24 is 40 mm, and the distance d2 from the light-emitting element is preferably 2 mm to 30 mm.

此外，作為光半透過部32係衰減來自發光元件14之光而進行透過，作為其光反射率係最好是50%~95%、更加理想是80%~95%。Further, the light semi-transmissive portion 32 attenuates light from the light-emitting element 14 and transmits it. The light reflectance is preferably 50% to 95%, more preferably 80% to 95%.

此外，作為光半透過部32係並無特別限定，但是，例如可以使用鋁、金、銀、白金等之金屬薄膜、白色油墨等。Further, the light semi-transmissive portion 32 is not particularly limited, and for example, a metal thin film such as aluminum, gold, silver or platinum, white ink or the like can be used.

在此狀態下，在金、銀、白金等之金屬薄膜之狀態，例如可以藉由蒸鍍、濺鍍、無電解電鍍等之方法而形成。此外，作為白色油墨係可以使用例如含二氧化鈦之丙烯樹脂等，能夠藉由分配器或印刷之方法而塗敷這個。In this state, in the state of a metal thin film such as gold, silver or platinum, it can be formed, for example, by a method such as vapor deposition, sputtering, or electroless plating. Further, as the white ink, for example, a titanium oxide-containing acryl resin or the like can be used, and this can be applied by a dispenser or a printing method.

即使是在這些當中，使用白色油墨之塗敷者係如果是考慮操作性等的話，則最好是簡便。Even among these, it is preferable that the applicator using white ink is operability or the like.

可以在一起藉由相同之白色油墨而形成光半透過部32及光反射部22之狀態下，在光半透過部32，調整成為透過光之一部分之稀薄之膜厚，並且，在光反射部22，調整成為並無透過光之厚實之膜厚。In the state in which the light semi-transmissive portion 32 and the light reflecting portion 22 are formed by the same white ink, the thin semi-transmissive portion 32 is adjusted to have a thin film thickness which is a part of the transmitted light, and in the light reflecting portion. 22, the adjustment becomes a thick film thickness that does not transmit light.

藉由像這樣構成而正如在第9圖之箭號D所示，使得由發光元件14開始直接地導光至發光元件14之正上方之導光構件16上面之光，通過此光半透過部32，來進行衰減，減少在此部分之亮度。With such a configuration, as shown by the arrow D in FIG. 9, the light which is directly guided by the light-emitting element 14 to the light guiding member 16 directly above the light-emitting element 14 passes through the light semi-transmissive portion. 32, to attenuate, reduce the brightness in this part.

藉此而正如第4圖之圖形之實線所示，發光元件14之正上方附近之亮度係比起習知之背光光源、第2圖及第3圖所示之實施形態之面光源裝置10，還更加減少，並且，得到均一之亮度。Accordingly, as shown by the solid line in the graph of FIG. 4, the brightness near the upper side of the light-emitting element 14 is higher than that of the conventional backlight source, the surface light source device 10 of the embodiment shown in FIGS. 2 and 3. It is also more reduced, and a uniform brightness is obtained.

第10圖係顯示適用本發明之另外其他實施形態之導光構件之本發明之面光源裝置之第4實施形態之俯視圖。Fig. 10 is a plan view showing a fourth embodiment of the surface light source device of the present invention to which the light guiding member according to still another embodiment of the present invention is applied.

此實施形態之面光源裝置10係在基本上，相同於第2圖及第3圖所示之面光源裝置10之同樣構造，在相同之構成構件，附加相同之參考圖號，省略其詳細說明。The surface light source device 10 of the embodiment is basically the same as the surface light source device 10 shown in FIGS. 2 and 3, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. .

在此實施形態之面光源裝置10，正如第10圖所示，在導光構件16之下面18之發光元件14之周圍附近區域24內，形成光散亂用點圖案。In the surface light source device 10 of this embodiment, as shown in Fig. 10, a dot pattern for light scattering is formed in the vicinity 24 of the vicinity of the light-emitting element 14 on the lower surface 18 of the light guiding member 16.

接著，形成光散亂用點圖案而使得點形狀之光反射部之點密度，越接近於發光元件而越加成為低密度。Next, a dot pattern for light scattering is formed so that the dot density of the dot-shaped light reflecting portion becomes a lower density as it approaches the light-emitting element.

可以藉由像這樣，在導光構件16之下面18之發光元件14之周圍附近區域24內，形成點圖案，而緩和在發光元件14之周圍附近區域24及光反射部22之境界之擴散強度之間隙。By thus, a dot pattern can be formed in the vicinity 24 around the light-emitting element 14 of the lower surface 18 of the light guiding member 16 to alleviate the diffusion intensity at the boundary between the region 24 and the light reflecting portion 22 around the light-emitting element 14. The gap.

作為點印刷圖案係並無特別限定，但是，成為以發光元件14之正上方部之位置作為中心之圓形之圖案，朝向於導光構件16之上方之擴散強度係點圖案之中心最低，成為越加進行至周邊而越大之圖案。The dot print pattern is not particularly limited, but is a circular pattern centering on the position of the light-emitting element 14 at the center of the light-emitting element 14 , and the center of the diffusion intensity dot pattern toward the upper side of the light-guiding member 16 is the lowest. The pattern is increased as it goes to the periphery.

此外，此種光散亂點係可以藉由對於散亂性油墨，進行點印刷，或者是一體成模於導光構件16而形成。Further, such a light scattering point can be formed by dot printing for a dispersive ink or integrally molded on the light guiding member 16.

作為此種散亂性油墨係並無特別限定，但是，例如可以將含有樹脂顆粒或玻璃顆粒之油墨、或者是前述之白色油墨等予以使用。The dispersible ink system is not particularly limited, and for example, an ink containing resin particles or glass particles or a white ink or the like described above may be used.

即使是此種構造之面光源裝置10，也減少發光元件14之正上方附近之亮度，得到均勻之亮度。Even in the surface light source device 10 of such a configuration, the brightness in the vicinity of the immediately above the light-emitting element 14 is reduced, and uniform brightness is obtained.

此外，正如第11圖所示之第5實施形態，也在此狀態下，正如第8圖及第9圖之實施形態之面光源裝置10，在對應於導光構件16上面之發光元件14之位置、也就是在發光元件14之正上方之位置，在此實施形態，也可以設置圓形狀之光半透過部32。Further, as in the fifth embodiment shown in Fig. 11, in this state, as in the surface light source device 10 of the embodiment of Figs. 8 and 9, the light-emitting element 14 corresponding to the light guide member 16 is provided. The position, that is, the position directly above the light-emitting element 14, in this embodiment, a circular light semi-transmissive portion 32 may be provided.

此外，在此實施形態，在導光構件16之下面18之發光元件14之周圍附近區域24內，形成光散亂用點圖案，但是，也可以在導光構件16之下面18之本身，形成微小之凹凸，來取代點形狀而控制擴散之強度。Further, in this embodiment, a dot pattern for light scattering is formed in the vicinity 24 of the vicinity of the light-emitting element 14 of the lower surface 18 of the light guiding member 16, but it may be formed on the lower surface 18 of the light guiding member 16 itself. The tiny bumps replace the shape of the dots to control the intensity of the spread.

第12圖係顯示適用本發明之另外其他之實施形態之導光構件之本發明之面光源裝置之第6實施形態之俯視圖，第13圖係在第12圖之A－A線之部分擴大剖面圖。Fig. 12 is a plan view showing a sixth embodiment of the surface light source device of the present invention to which the light guiding member according to still another embodiment of the present invention is applied, and Fig. 13 is a partially enlarged cross-sectional view taken along line A-A of Fig. 12; Figure.

此實施形態之面光源裝置10係在基本上，相同於第2圖及第3圖所示之面光源裝置10之同樣構造，在相同之構成構件，附加相同之參考圖號。The surface light source device 10 of this embodiment is basically the same as the surface light source device 10 shown in Figs. 2 and 3, and the same constituent elements are denoted by the same reference numerals.

在第12圖及第13圖，圖號10係以整體而顯示本發明之面光源裝置。In Fig. 12 and Fig. 13, Fig. 10 shows the surface light source device of the present invention as a whole.

本發明之面光源裝置10係正如第13圖所示，具備發光元件構裝用基板12，在此發光元件構裝用基板12之上面，構裝例如由LED等之所構成之發光元件14。The surface light source device 10 of the present invention includes a light-emitting element mounting substrate 12 as shown in Fig. 13, and a light-emitting element 14 composed of, for example, an LED or the like is mounted on the upper surface of the light-emitting element mounting substrate 12.

此發光元件14係在發光元件構裝用基板12之上面，正如第12圖所示，以一定之間隔分離而呈縱橫及陣列狀地配置複數個之發光元件14。The light-emitting elements 14 are placed on the upper surface of the light-emitting element mounting substrate 12, and as shown in Fig. 12, a plurality of light-emitting elements 14 are arranged in a vertical and horizontal direction and an array in a predetermined interval.

接著，在此發光元件構裝用基板12之上面，配置由透明之樹脂等之所構成之導光構件16。在此導光構件16，正如第13圖所示，在導光構件16之下面18，在對應於發光元件14之位置，形成發光元件收納用凹部20，在此發光元件收納用凹部20內，收納發光元件14。Next, on the upper surface of the light-emitting element mounting substrate 12, a light guiding member 16 made of a transparent resin or the like is disposed. In the light guide member 16, as shown in FIG. 13, the light-emitting element housing recess 20 is formed in the lower surface 18 of the light guiding member 16 at a position corresponding to the light-emitting element 14, and the light-emitting element housing recess 20 is provided in the light-emitting element housing recess portion 20, The light emitting element 14 is housed.

此外，作為此發光元件收納用凹部20之形狀係可以適度地變化成為圓頂形狀、半球狀、圓錐形狀等。In addition, the shape of the light-emitting element housing recess 20 can be appropriately changed to a dome shape, a hemispherical shape, a conical shape, or the like.

此外，並無圖示，但是，在此發光元件構裝用基板12，例如形成銅等之配線圖案，藉由利用此配線，來供應既定之電流至發光元件，而控制發光元件14之發光。In addition, in the light-emitting element mounting substrate 12, for example, a wiring pattern such as copper is formed, and by using the wiring, a predetermined current is supplied to the light-emitting element, and the light-emitting element 14 is controlled to emit light.

此外，構成導光構件16係使得朝向於發光元件14周圍附近之導光構件16下面之上方之擴散強度，還更加小於朝向至具有該外圍側部分之光反射部22之導光構件16下面之上方之擴散光之強度。Further, the light guiding member 16 is configured such that the diffusion intensity above the lower surface of the light guiding member 16 in the vicinity of the periphery of the light emitting element 14 is further smaller than the light guiding member 16 facing the light reflecting portion 22 having the peripheral side portion. The intensity of the diffused light above.

也就是說，在此實施形態，正如第12圖及第13圖所示，在除了發光元件14之周圍附近以外之導光構件16之下面18，將具有反射光而擴散之作用之光反射部22予以具備。In other words, in this embodiment, as shown in Figs. 12 and 13, the light reflecting portion having the function of diffusing light and diffusing is provided on the lower surface 18 of the light guiding member 16 except for the vicinity of the periphery of the light emitting element 14. 22 to be available.

此外，正如第13圖所示，在發光元件收納用凹部20凹面之發光元件14上方之部分，將具有反射光而擴散之作用並且透過一部分之光(光透過率：10~50%程度)之光半透過部11予以設置。Further, as shown in Fig. 13, the portion above the light-emitting element 14 having the concave surface of the light-emitting element housing recess 20 has a function of diffusing light and diffusing, and transmits a part of the light (light transmittance: 10 to 50%). The light semi-transmissive portion 11 is provided.

在此，所謂「上方之位置」係表示對向之發光元件14(在具有透鏡13之狀態、包含透鏡)投影於正上方之區域、也就是包含發光元件14之正上方之至少一部分之區域。第13圖係相當於概略相等於發光元件收納用凹部20凹面之發光元件14(透鏡13)之正上方全區域之區域來設置光半透過部11之狀態。Here, the "upper position" means a region in which the light-emitting element 14 (including the lens 13 and including the lens) is projected directly above, that is, a region including at least a portion directly above the light-emitting element 14. The figure 13 corresponds to a state in which the light semi-transmissive portion 11 is provided in a region which is substantially equal to the entire region directly above the light-emitting element 14 (lens 13) which is a concave surface of the light-emitting element housing recess 20 .

但是，此光半透過部11係可以位處在對應於導光構件16之發光元件收納用凹部20凹面之發光元件14之位置。也就是說，正如前面之敘述，不僅是位處於發光元件14之正上方(不需要一定具備於正上方之整個面)之位置之狀態，發光元件14之光以及藉由光半透過部11而進行擴散及反射之光係可以形成在射出至發光元件收納用凹部20之外方之範圍內、在包含發光元件14之正上方之更加寬之區域。However, the light semi-transmissive portion 11 can be positioned at a position corresponding to the light-emitting element 14 having a concave surface of the light-emitting element housing recess 20 of the light guiding member 16. That is to say, as described above, not only the position of the light-emitting element 14 but also the position of the light-emitting element 14 (which does not necessarily have to be provided on the entire upper surface) is the light of the light-emitting element 14 and by the light-transmissive portion 11 The light that is diffused and reflected can be formed in a wider area directly above the light-emitting element 14 within a range that is emitted outside the light-emitting element housing recess 20 .

作為設置光半透過部11之範圍、也就是正如第13圖所示、由發光元件14開始至光半透過部11之外圍端部為止之距離d3係可以配合於發光元件14之種類、亮度、導光構件16之種類、厚度、光反射部22之種類、膜厚、由發光元件14開始至發光元件14之周圍附近區域24之外圍端部為止之距離d1、發光元件收納用凹部20之形狀等而正如第4圖之實線之圖形所示，設定成為幾乎均勻之亮度，並無特別限制。The distance d3 from the light-emitting element 14 to the peripheral end portion of the light semi-transmissive portion 11 as shown in Fig. 13 can be matched to the type, brightness, and brightness of the light-emitting element 14 as shown in Fig. 13 . The type and thickness of the light guiding member 16, the type of the light reflecting portion 22, the film thickness, the distance d from the light emitting element 14 to the peripheral end portion of the vicinity of the vicinity of the light emitting element 14, and the shape of the light emitting element housing recess 20 As shown in the graph of the solid line in FIG. 4, the brightness is set to be almost uniform, and is not particularly limited.

在發光元件14，在其上部，在嵌合於發光元件收納用凹部20內之部分，設置透鏡13。但是，當然也可以不設置透鏡13。The light-emitting element 14 is provided with a lens 13 at a portion of the light-emitting element 14 that is fitted into the light-emitting element housing recess 20 . However, of course, the lens 13 may not be provided.

正如第26圖所示，在習知之面光源裝置300，即使是LED燈302之周圍附近，也藉由反射部312而正如箭號B所示，反射來自LED燈302之光，由導光構件306之上面314開始至上方，進行導光而進行擴散及反射。As shown in Fig. 26, in the conventional surface light source device 300, even in the vicinity of the periphery of the LED lamp 302, the light from the LED lamp 302 is reflected by the reflecting portion 312 as indicated by the arrow B, by the light guiding member. The upper surface 314 of 306 starts to the top and conducts light to diffuse and reflect.

結果，正如第4圖之圖形之一點鏈線所示，在習知之面光源裝置300，使得由導光構件306之LED燈302之正上方部分之上面314開始射出之光量變大，提高LED燈302之正上方部分之亮度。As a result, as shown by the dotted line of the graph of Fig. 4, in the conventional surface light source device 300, the amount of light emitted from the upper surface 314 of the portion directly above the LED lamp 302 of the light guiding member 306 becomes large, and the LED lamp is raised. The brightness of the portion directly above 302.

相對於此，如果藉由此實施形態之面光源裝置10的話，則在導光構件16之發光元件用凹部20之凹面，設置光半透過部11。因此，正如第13(B)圖所示，由發光元件14射出之光E1係由並無存在光半透過部11之部分開始，正如箭號E2所示，在藉由導光構件16之上面26而進行反射後，在導光構件16之上面26和下面18之間，重複地進行反射，正如在第13(A)圖之箭號E3所示，到達至光反射部22，正如在第13(A)圖之箭號C1~C3所示，藉由進行擴散及反射而朝向至導光構件之上方，進行擴散及反射。On the other hand, according to the surface light source device 10 of the embodiment, the light semi-transmissive portion 11 is provided on the concave surface of the light-emitting element concave portion 20 of the light guiding member 16. Therefore, as shown in Fig. 13(B), the light E1 emitted from the light-emitting element 14 is started by the portion where the light semi-transmissive portion 11 is not present, as indicated by the arrow E2, on the upper surface of the light guiding member 16. After the reflection 26, the reflection is repeatedly performed between the upper surface 26 and the lower surface 18 of the light guiding member 16, as indicated by the arrow E3 in Fig. 13(A), reaching the light reflecting portion 22, as in the first As shown by arrows (C1 to C3) in Fig. 13(A), diffusion and reflection are performed toward the upper side of the light guiding member to diffuse and reflect.

此外，由發光元件14開始射出至正上方之方向之光D係藉由光半透過部11而減低射出至正上方之光，結果，減低來自導光構件16之上面之射出光。Further, the light D emitted from the light-emitting element 14 in the direction immediately above the light is transmitted through the light semi-transmissive portion 11 to reduce the light emitted directly upward, and as a result, the light emitted from the upper surface of the light guiding member 16 is reduced.

因此，抑制在導光構件16之發光元件14之正上方之亮度。Therefore, the brightness directly above the light-emitting element 14 of the light guiding member 16 is suppressed.

此外，在發光元件14周圍附近之導光構件之下面，並無設置光反射部22，因此，正如第13圖之箭號E1所示，來自發光元件14之光係在發光元件14之周圍附近，正如箭號E2所示，藉由導光構件16之下面18而進行正反射(全反射)之光係僅導光於導光構件16之上面26和下面18之間，由導光構件16之上面26開始，並無擴散及反射於上方而進行導光。Further, the light reflecting portion 22 is not provided under the light guiding member near the periphery of the light emitting element 14, and therefore, as indicated by an arrow E1 in Fig. 13, the light from the light emitting element 14 is near the periphery of the light emitting element 14. As shown by the arrow E2, the light of the regular reflection (total reflection) by the lower surface 18 of the light guiding member 16 is guided only between the upper surface 26 and the lower surface 18 of the light guiding member 16, by the light guiding member 16. Starting from the top 26, no light is diffused and reflected above.

接著，正如第13圖之箭號E3所示，到達至光反射部22之光係正如在箭號C1~C3所示，藉由進行擴散及反射而朝向於導光構件之上方，進行擴散及反射。Next, as shown by the arrow E3 in Fig. 13, the light reaching the light reflecting portion 22 is diffused and reflected toward the upper side of the light guiding member by diffusion and reflection as indicated by the arrows C1 to C3. reflection.

藉此而正如前面之敘述，構成朝向於發光元件14周圍附近之導光構件16下面之上方之擴散光之強度係更加小於朝向至具有其外圍側部分之光反射部22之導光構件下面之上方之擴散光之強度。Thereby, as described above, the intensity of the diffused light which is formed above the lower surface of the light guiding member 16 in the vicinity of the periphery of the light-emitting element 14 is made smaller than that of the light guiding member facing the light reflecting portion 22 having the peripheral side portion thereof. The intensity of the diffused light above.

藉此而正如第4圖之圖形之點線所示，發光元件14之正上方附近之亮度係更加減少於習知之背光光源，相對取代地增加在其外方之亮度，達到亮度之均一化。Thereby, as shown by the dotted line of the graph of Fig. 4, the brightness near the upper side of the light-emitting element 14 is further reduced to the conventional backlight source, and the brightness outside the surface is relatively increased to achieve uniformity of brightness.

在此狀態下，並無具有光反射部22之發光元件14之周圍附近區域24之形狀係正如此實施形態，成為由發光元件14開始至均一之距離為止之圓形狀，但是，並非限定於此形狀，正如第14圖所示，可以成為橢圓形狀(第14(A)圖)、矩形狀(第14(B)圖)、三角形狀(第14(C)圖)、拱形狀(第14(D)圖)、多角形狀等之其他形狀。In this state, the shape of the region 24 in the vicinity of the periphery of the light-emitting element 14 having the light-reflecting portion 22 is a circular shape in which the light-emitting element 14 starts to a uniform distance, but is not limited thereto. The shape, as shown in Fig. 14, can be an elliptical shape (Fig. 14(A)), a rectangular shape (14th (B)), a triangular shape (14th (C)), and an arch (14th) D) Figure), other shapes such as polygonal shapes.

此外，作為並無具有光反射部22之發光元件14之周圍附近區域24、也就是正如第13圖所示、由發光元件14開始至周圍附近區域24之外圍端部為止之距離d1係可以配合於發光元件14之種類、亮度、導光構件16之種類、厚度、光反射部22之種類、膜厚等而正如第4圖之實線之圖形所示，設定成為幾乎均勻之亮度，並無特別限定。Further, as a region 24 near the periphery of the light-emitting element 14 having no light-reflecting portion 22, that is, as shown in Fig. 13, the distance d1 from the light-emitting element 14 to the peripheral end portion of the peripheral region 24 can be matched. The type of the light-emitting element 14, the brightness, the type and thickness of the light-guiding member 16, the type of the light-reflecting portion 22, the film thickness, and the like are set to be almost uniform brightness as shown by the solid line in FIG. Specially limited.

例如在發光元件14成為LED、導光構件16成為透明樹脂板、厚度3mm、光反射部22成為白色塗裝、厚度5 μm~100 μm之狀態下，由發光元件14開始至周圍附近區域24之外圍端部為止之距離d1係可以成為40mm程度。For example, when the light-emitting element 14 is an LED, the light-guiding member 16 is a transparent resin plate, the thickness is 3 mm, the light-reflecting portion 22 is white-coated, and the thickness is 5 μm to 100 μm, the light-emitting element 14 starts to the vicinity of the surrounding area 24 . The distance d1 from the peripheral end portion can be about 40 mm.

此外，在複數個之發光元件14相鄰接之發光元件之中心間之離開間隔成為D而由形成周圍附近區域24之發光元件14之中心開始之均一距離成為d之時，最好是D/4≧d1。Further, when the separation interval between the centers of the light-emitting elements adjacent to the plurality of light-emitting elements 14 is D and the uniform distance from the center of the light-emitting elements 14 forming the surrounding area 24 becomes d, it is preferably D/ 4≧d1.

作為發光元件14係並無特別限定，但是，例如作為液晶顯示器之背光光源用係LED能夠實現良好之色再現性和高速應答性，可以達成高品位之畫質，因此，變得理想。The light-emitting element 14 is not particularly limited. For example, the LED for backlight source of a liquid crystal display can achieve good color reproducibility and high-speed response, and can achieve high-quality image quality.

作為LED係可以使用單色之LED，但是，可以使用組合不同發光色之複數種類之發光元件14之單位發光元件、例如紅、綠、藍之三原色之LED晶片、也就是發光於紅色之LED晶片R、發光於綠色之LED晶片G、發光於藍色之LED晶片B，適度地使用藉由這些之混色而而發光白色之所謂三合一形式之封裝。As the LED system, a single-color LED can be used. However, a unit light-emitting element that combines a plurality of types of light-emitting elements 14 of different light-emitting colors, an LED chip of three primary colors of red, green, and blue, that is, an LED chip that emits light in red can be used. R, an LED chip G that emits light in green, and an LED chip B that emits light in blue, and a so-called three-in-one package that emits white by these mixed colors is appropriately used.

正如三合一形式，也在組合及使用不同發光色之複數種類之發光元件14之狀態下，正如第15圖所示，周圍附近區域24係可以配合於這些LED晶片之配置形狀而除了第12圖之實施形態之圓形狀以外，還成為橢圓形狀(第15(A)圖)、矩形狀(第15(B)圖)、三角形狀(第15(C)圖)、拱形狀(第15(D)圖)之多角形狀等之其他形狀。As in the three-in-one form, in the state in which a plurality of types of light-emitting elements 14 of different illuminating colors are combined and used, as shown in Fig. 15, the surrounding area 24 can be fitted to the arrangement shape of these LED chips except for the 12th. In addition to the circular shape of the embodiment, the elliptical shape (15th (A)), the rectangular (15th (B)), the triangular (15th (C)), and the arch (15th) D) Figure) Other shapes such as polygonal shapes.

此外，並無圖示，但是，作為單位發光元件係正如前面之敘述，也除了藉由R、G、B之分別各1個而成為1單位以外，例如藉由R1個、G2個、B1個而成為1單位者、藉由R2個、G2個、B1個而成為1單位者等，特別是其組合係並無限定。In addition, as a unit light-emitting element, as described above, it is one unit other than R, G, and B, and is, for example, R1, G2, and B1. In the case of one unit, R2, G2, and B1 are one unit, and the combination is not limited.

此外，作為單位發光元件係正如前面之敘述，並無限定在藍、綠、紅之3色，例如也可以將黃、橙、藍綠等之所謂中間色之LED晶片，設置在同一基板上，成為4色、5色等。In addition, as a unit light-emitting element, as described above, it is not limited to three colors of blue, green, and red. For example, an LED chip of a so-called intermediate color such as yellow, orange, or blue-green may be provided on the same substrate. 4 colors, 5 colors, etc.

此外，作為導光構件16係如果是傳播光的話，則並無特別限定，例如可以使用丙烯樹脂、聚碳酸酯樹脂、液晶聚合物、聚苯乙烯樹脂等。In addition, the light guiding member 16 is not particularly limited as long as it transmits light, and for example, an acrylic resin, a polycarbonate resin, a liquid crystal polymer, a polystyrene resin or the like can be used.

此外，作為光半透過部11係如果是具有反射光而擴散之作用並且透過一部分之光(光透過率：10~50%程度)的話，則並無特別限定，但是，可以使用例如鋁箔等之金屬箔、鋁、金、銀、白金等之金屬薄膜、白色油墨等。In addition, the light semi-transmissive portion 11 is not particularly limited as long as it has a function of diffusing light and diffusing light (light transmittance: 10 to 50%). However, for example, aluminum foil or the like can be used. Metal foil, aluminum, gold, silver, platinum, etc., metal film, white ink, etc.

此外，作為光反射部22係如果是具有反射光而擴散之作用的話，則並無特別限定，但是，可以使用例如白色油墨等。In addition, the light reflecting portion 22 is not particularly limited as long as it has a function of diffusing light, but a white ink or the like can be used.

此外，可以藉由將混練由二氧化鈦等之所構成之擴散物質之橡膠狀成形體，貼合在發光元件收納用凹部20之內表面，或者是印刷於發光元件收納用凹部20之內表面，或者是進行噴砂處理等而形成。In addition, the rubber-like molded body in which the diffusing material composed of titanium dioxide or the like is kneaded may be bonded to the inner surface of the light-emitting element housing recess 20 or printed on the inner surface of the light-emitting element housing recess 20, or It is formed by sandblasting or the like.

在此狀態下，在鋁箔等之金屬箔之狀態，可以藉由透明接著劑而進行貼附。此外，在鋁、金、銀、白金等之金屬薄膜之狀態下，可以藉由例如蒸鍍、濺鍍、無電解電鍍等之方法而形成。此外，作為白色油墨係可以使用例如含二氧化鈦之丙烯樹脂等，可以藉由分配器或印刷之方法而塗敷這個。In this state, in the state of the metal foil such as aluminum foil, it can be attached by a transparent adhesive. Further, in the state of a metal thin film such as aluminum, gold, silver or platinum, it can be formed by a method such as vapor deposition, sputtering, electroless plating or the like. Further, as the white ink, for example, a titanium oxide-containing acryl resin or the like can be used, and this can be applied by a dispenser or a printing method.

即使是在這些當中，使用白色油墨之塗敷者係如果是考慮操作性等的話，則最好是簡便。Even among these, it is preferable that the applicator using white ink is operability or the like.

可以在一起藉由相同之白色油墨而形成光半透過部11及光反射部22之狀態下，在光半透過部11，調整成為透過光之一部分之稀薄之膜厚，並且，在光反射部22，調整成為並無透過光之厚實之膜厚。In a state in which the light semi-transmissive portion 11 and the light reflecting portion 22 are formed by the same white ink, the thin semi-transmissive portion 11 is adjusted to have a thin film thickness which is a part of the transmitted light, and in the light reflecting portion. 22, the adjustment becomes a thick film thickness that does not transmit light.

此外，也可以在白色油墨，混入樹脂顆粒、玻璃顆粒等之光擴散劑而提高光擴散率。Further, in the white ink, a light diffusing agent such as resin particles or glass particles may be mixed to increase the light diffusivity.

此外，發光元件收納用凹部20之形狀係並無特別限定，例如可以採用圓錐、角錐、圓柱、角柱、半球狀等。Further, the shape of the light-emitting element housing recess 20 is not particularly limited, and for example, a cone, a pyramid, a cylinder, a corner post, a hemispherical shape, or the like can be used.

在發光元件14具備透鏡13之狀態下，如果是透明且表面具有既定之曲率之構造的話，則並無特別限定，例如可以由矽酮樹脂、環氧樹脂等之材料而構成。In the state in which the light-emitting element 14 is provided with the lens 13, the structure is not particularly limited as long as it is transparent and has a predetermined curvature. For example, the light-emitting element 14 may be made of a material such as an fluorenone resin or an epoxy resin.

此外，正如第16圖所示之第7實施形態，也可以在發光元件構裝用基板12之側，設置發光元件收納用凹部28，在發光元件構裝用基板12和導光構件16之間，透過絕緣層21而設置反射鏡30。Further, as in the seventh embodiment shown in FIG. 16, the light-emitting element housing recess 28 may be provided on the side of the light-emitting element mounting substrate 12 between the light-emitting element mounting substrate 12 and the light guiding member 16. The mirror 30 is provided through the insulating layer 21.

此外，在此實施形態，在發光元件構裝用基板12之上面，以一定之間隔分離而呈縱橫及陣列狀地配置複數個之發光元件14，但是，此發光元件14之數目(當然也可以是1個)、其配置形狀係並無特別限定，可以適度地變化例如配置成為同心圓狀、千鳥狀等。In addition, in this embodiment, a plurality of light-emitting elements 14 are arranged in a vertical, horizontal, and array shape on the upper surface of the light-emitting element mounting substrate 12 at regular intervals. However, the number of the light-emitting elements 14 (of course, The arrangement shape is not particularly limited, and may be appropriately changed, for example, to be concentric, or a thousand birds.

像這樣構成之本發明之面光源裝置10係使用作為廣告燈、照明、液晶背光用之光源等，例如可以在使用作為液晶用背光之狀態下，正如第1圖所示，在導光構件16之上面，透過擴散薄片、稜鏡薄片等而配置液晶面板，來成為液晶顯示裝置。The surface light source device 10 of the present invention configured as described above is used as a light source for an advertising lamp, illumination, or liquid crystal backlight. For example, in a state in which a backlight for liquid crystal is used, as shown in FIG. 1, the light guiding member 16 is used. On the upper surface, a liquid crystal panel is placed through a diffusion sheet, a ruthenium sheet, or the like to form a liquid crystal display device.

第17圖係顯示適用本發明之另外其他實施形態之導光構件之本發明之面光源裝置之第8實施形態之俯視圖。Fig. 17 is a plan view showing an eighth embodiment of the surface light source device of the present invention to which the light guiding member according to still another embodiment of the present invention is applied.

此實施形態之面光源裝置10係在基本上，相同於第2圖及第3圖所示之面光源裝置10之同樣構造，在相同之構成構件，附加相同之參考圖號，省略其詳細說明。The surface light source device 10 of the embodiment is basically the same as the surface light source device 10 shown in FIGS. 2 and 3, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. .

在此實施例之面光源裝置10，正如第17圖所示，相同於第4實施形態，在導光構件16之下面18之並無具有光反射部22之發光元件14之周圍附近區域24內，具有光散亂用點圖案。The surface light source device 10 of this embodiment is the same as that of the fourth embodiment, and is in the vicinity of the periphery of the light-emitting element 14 having the light-reflecting portion 22 in the lower surface 18 of the light-guiding member 16 as in the fourth embodiment. , with a dot pattern of light scattering.

接著，形成光散亂用點圖案而使得點形狀之光反射部之點密度，越接近於發光元件而越加成為低密度。Next, a dot pattern for light scattering is formed so that the dot density of the dot-shaped light reflecting portion becomes a lower density as it approaches the light-emitting element.

可以像這樣，即使是藉由形成點圖案，也緩和在發光元件14之周圍附近區域24及光反射部22之間之擴散光之強度之間隙。In this manner, even by forming the dot pattern, the gap between the intensity of the diffused light between the region 24 and the light reflecting portion 22 in the vicinity of the light-emitting element 14 can be alleviated.

作為點印刷圖案係並無特別限定，但是，成為以發光元件14之正上方部之位置作為中心之圓形之圖案，朝向於導光構件16之上方之擴散光之強度係點圖案之中心最低，成為越加進行至周邊而越大之圖案。The dot print pattern is not particularly limited, but is a circular pattern centering on the position of the light-emitting element 14 directly above, and the intensity of the diffused light toward the light guide member 16 is the lowest in the center of the dot pattern. It is a pattern that grows to the periphery and becomes larger.

此外，此種光散亂點係可以藉由對於散亂性油墨，進行點印刷，或者是一體成模於導光構件16而形成。Further, such a light scattering point can be formed by dot printing for a dispersive ink or integrally molded on the light guiding member 16.

作為此種散亂性油墨係並無特別限定，但是，例如可以將含有樹脂顆粒或玻璃顆粒之油墨、或者是前述之白色油墨等予以使用。The dispersible ink system is not particularly limited, and for example, an ink containing resin particles or glass particles or a white ink or the like described above may be used.

即使是此種構造之面光源裝置10，也減少發光元件14之正上方附近之亮度，得到均勻之亮度。Even in the surface light source device 10 of such a configuration, the brightness in the vicinity of the immediately above the light-emitting element 14 is reduced, and uniform brightness is obtained.

此外，在此實施形態，在導光構件16之下面18之發光元件14之周圍附近區域24內，形成光散亂用點圖案，但是，也可以在導光構件16之下面18之本身，形成微小之凹凸，來取代點形狀而控制擴散光之強度。Further, in this embodiment, a dot pattern for light scattering is formed in the vicinity 24 of the vicinity of the light-emitting element 14 of the lower surface 18 of the light guiding member 16, but it may be formed on the lower surface 18 of the light guiding member 16 itself. Tiny bumps are used to control the intensity of the diffused light instead of the dot shape.

[實施例][Examples] (實施例1)(Example 1)

在橫寬115mm×縱長135mm之發光元件構裝用基板12之上，作為發光元件14係以1W級之綠、紅、藍之LED晶片之組合，作為單位發光元件，正如第2圖所示，呈縱橫及陣列狀地進行配置。On the light-emitting element mounting substrate 12 having a width of 115 mm and a vertical length of 135 mm, a combination of green, red, and blue LED chips of 1 W level is used as the light-emitting element 14 as a unit light-emitting element, as shown in FIG. It is arranged in a vertical and horizontal array.

準備橫寬115mm、縱長135mm、厚度3mm之丙烯樹脂製透明板，來作為導光構件16。A transparent plate made of acrylic resin having a width of 115 mm, a length of 135 mm, and a thickness of 3 mm was prepared as the light guiding member 16.

在此導光構件16之下面18，在成為各個發光元件14之中心正上方之位置，設置半球狀(半徑)2.5mm之發光元件收納用凹部20。In the lower surface 18 of the light guiding member 16, a light-emitting element housing recess 20 having a hemispherical shape (radius) of 2.5 mm is provided at a position directly above the center of each of the light-emitting elements 14.

此外，在此導光構件16之下面18，藉由噴射塗裝而塗敷及設置由含有50%(僅固態成分)之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚100 μm，而形成光反射部22。Further, on the lower surface 18 of the light guiding member 16, a white paint composed of a propylene resin containing 50% (solid content only) of titanium oxide is applied and provided by spray coating to have a film thickness of 100 μm. The light reflecting portion 22 is formed.

在此狀態下，除了發光元件14之周圍附近區域24以外而形成此光反射部22。周圍附近區域24係形成以由發光元件14之中心開始至周圍附近區域24之外圍端部為止之距離d1而成為40mm(參考第18圖)。In this state, the light reflecting portion 22 is formed in addition to the vicinity 24 of the vicinity of the light emitting element 14. The surrounding area 24 is formed to have a distance d1 from the center of the light-emitting element 14 to the peripheral end portion of the surrounding area 24 to be 40 mm (refer to Fig. 18).

此外，發光元件14間之距離D係180mm。Further, the distance D between the light-emitting elements 14 is 180 mm.

接著，層積及固定此丙烯樹脂製透明板而使得發光元件收納用凹部20對向於發光元件14，得到本發明之面光源裝置10(參考第3圖)。Then, the acryl resin transparent plate is laminated and fixed, and the light-emitting element housing recess 20 is opposed to the light-emitting element 14, and the surface light source device 10 of the present invention is obtained (refer to FIG. 3).

接著，在各個之紅色LED、綠色LED和藍色LED，流動紅色280mA、綠色360mA和藍色120mA之電流。Next, currents of red 280 mA, green 360 mA, and blue 120 mA flow in the respective red LEDs, green LEDs, and blue LEDs.

藉此而由發光元件14正上方之擴散板之上面位置O開始，以0.5mm之距離，在每0.5cm之間隔，沿著橫方向，使用「分光放射亮度計CS－1000A」(柯尼卡美露達股份有限公司製)，測定相對亮度。此外，此相對亮度之測定係在本發明之樹脂導光構件之上25mm，配置「擴散板PC9391－50HLW」(帝人股份有限公司製)。Thereby, starting from the upper position O of the diffusing plate directly above the light-emitting element 14, the "Spectrophotometer CS-1000A" (Konica) is used along the horizontal direction at a distance of 0.5 mm at a distance of 0.5 mm. Relative brightness was measured by Melody Co., Ltd.). In addition, the relative brightness was measured by 25 mm on the resin light guiding member of the present invention, and "diffuser plate PC9391-50HLW" (manufactured by Teijin Co., Ltd.) was placed.

將此結果，顯示在表1及第23圖之圖形。The results are shown in the graphs of Tables 1 and 23.

(實施例2)(Example 2)

除了以下之方面以外，其餘係相同於實施例1，得到第19圖所示之本發明之面光源裝置10。The surface light source device 10 of the present invention shown in Fig. 19 was obtained in the same manner as in the first embodiment except for the following points.

也就是說，正如第8圖及第9圖所示，還在對應於導光構件16上面之發光元件14之位置、也就是發光元件14之正上方位置，形成圓形狀之光半透過部32。That is, as shown in Figs. 8 and 9, a circular light semi-transmissive portion 32 is formed at a position corresponding to the light-emitting element 14 on the upper surface of the light guiding member 16, that is, directly above the light-emitting element 14. .

作為此光半透過部32係在由發光元件14開始至光半透過部32之外圍端部為止之距離d2成為5mm之導光構件之上面區域，藉由噴射塗裝而塗敷及設置由含有50%(僅固態成分)之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚20 μm，形成光半透過部32。The light semi-transmissive portion 32 is an upper surface region of the light guiding member having a distance d2 of 5 mm from the light-emitting element 14 to the peripheral end portion of the light semi-transmissive portion 32, and is coated and provided by the spray coating. A white paint composed of a 50% (solid content only) titanium oxide propylene resin has a film thickness of 20 μm to form a light semi-transmissive portion 32.

藉此而由發光元件14正上方之擴散板之上面位置O開始，以0.5mm之距離，在每0.5cm之間隔，沿著橫方向，相同於實施例1，測定相對亮度。Thereby, the relative luminance was measured in the same manner as in the first embodiment at intervals of 0.5 mm from the upper position O of the diffusion plate directly above the light-emitting element 14 at intervals of 0.5 mm.

將此結果，顯示在表1及第23圖之圖形。The results are shown in the graphs of Tables 1 and 23.

(實施例3)(Example 3)

除了以下之方面以外，其餘係相同於實施例1，得到第20圖所示之本發明之面光源裝置10。The surface light source device 10 of the present invention shown in Fig. 20 was obtained in the same manner as in the first embodiment except for the following points.

也就是說，在發光元件收納用凹部20之凹面，形成光半透過部11。In other words, the light semi-transmissive portion 11 is formed on the concave surface of the light-emitting element housing recess 20 .

藉由噴射塗裝而塗敷及設置由含有50%之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚20 μm，形成光半透過層11。A white paint composed of a propylene resin containing 50% of titanium oxide was applied by spray coating to a film thickness of 20 μm to form a light semi-transmissive layer 11.

此外，作為設置光半透過部11之範圍、也就是正如第20圖所示、由發光元件14之中心開始至光半透過部11之外圍端部為止之距離d3係成為大約1.8mm而概略隱藏綠、紅、藍之LED晶片。Further, as a range in which the light semi-transmissive portion 11 is provided, that is, as shown in Fig. 20, the distance d3 from the center of the light-emitting element 14 to the peripheral end portion of the light semi-transmissive portion 11 is approximately 1.8 mm and is roughly hidden. Green, red and blue LED chips.

此外，在此導光構件16之下面18，在概略整個面，藉由噴射塗裝而塗敷及設置由含有50%之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚200 μm，形成光反射部22。Further, on the lower surface 18 of the light guiding member 16, a white paint composed of a propylene resin containing 50% of titanium oxide is applied and provided on the entire surface by spray coating to have a film thickness of 200 μm. Light reflecting portion 22.

在此狀態下，除了發光元件14之周圍附近區域24以外而形成此光反射部22。周圍附近區域24係形成以由發光元件14之中心開始至周圍附近區域24之外圍端部為止之距離d1而成為40mm(參考第20圖)。In this state, the light reflecting portion 22 is formed in addition to the vicinity 24 of the vicinity of the light emitting element 14. The surrounding area 24 is formed to have a distance d1 from the center of the light-emitting element 14 to the peripheral end portion of the surrounding area 24 to be 40 mm (refer to Fig. 20).

接著，層積及固定此丙烯樹脂製透明板而使得發光元件收納用凹部20對向於發光元件14，得到本發明之面光源裝置10(參考第13圖)。Then, the transparent plate made of acryl resin is laminated and fixed, and the light-emitting element housing recess 20 is opposed to the light-emitting element 14 to obtain the surface light source device 10 of the present invention (refer to Fig. 13).

接著，在各個之紅色LED、綠色LED和藍色LED，流動紅色280mA、綠色360mA和藍色120mA之電流。Next, currents of red 280 mA, green 360 mA, and blue 120 mA flow in the respective red LEDs, green LEDs, and blue LEDs.

藉此而由發光元件14正上方之擴散板之上面位置O開始，以0.5mm之距離，在每0.5cm之間隔，沿著橫方向，測定相對亮度。Thereby, the relative luminance was measured along the lateral direction at intervals of 0.5 mm from the upper position O of the diffusion plate directly above the light-emitting element 14.

將此結果，顯示在表1及第23圖之圖形。The results are shown in the graphs of Tables 1 and 23.

(比較例1)(Comparative Example 1)

除了以下之方面以外，其餘係相同於實施例1，得到第21圖所示之面光源裝置10。The surface light source device 10 shown in Fig. 21 was obtained in the same manner as in the first embodiment except for the following points.

也就是說，正如第21圖所示，在除了導光構件16之發光元件收納用凹部20以外之下面18，在概略整個面，藉由噴射塗裝而塗敷及設置由含有50%(僅固態成分)之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚100 μm，形成光反射部22。在此狀態下，正如實施例1，僅具有：將無形成圓形狀之光反射部22之發光元件附近區域24予以並無實質設置且對應於發光元件14之大小之所對應之直徑5mm之發光元件收納用凹部20之圓形的小缺口部34。In other words, as shown in Fig. 21, the lower surface 18 other than the light-emitting element housing recess 20 of the light guiding member 16 is coated and disposed on the entire surface by spray coating to contain 50% (only The white paint composed of the titanium oxide propylene resin of the solid content was formed to have a film thickness of 100 μm to form the light reflection portion 22. In this state, as in the first embodiment, only the light-emitting element vicinity region 24 of the light-reflecting portion 22 having no circular shape is formed, and the light-emitting element having a diameter of 5 mm corresponding to the size of the light-emitting element 14 is not substantially disposed. A circular small notch portion 34 of the component housing recess 20 .

藉此而由發光元件14正上方之擴散板之上面位置O開始，以0.5mm之距離，在每0.5cm之間隔，沿著橫方向，相同於實施例1，測定相對亮度。Thereby, the relative luminance was measured in the same manner as in the first embodiment at intervals of 0.5 mm from the upper position O of the diffusion plate directly above the light-emitting element 14 at intervals of 0.5 mm.

將此結果，顯示在表1及第23圖之圖形。The results are shown in the graphs of Tables 1 and 23.

(比較例2)(Comparative Example 2)

除了以下之方面以外，其餘係相同於實施例1，得到第22圖所示之面光源裝置10。The surface light source device 10 shown in Fig. 22 was obtained in the same manner as in the first embodiment except for the following points.

也就是說，正如第22圖所示，在除了導光構件16之發光元件收納用凹部20以外之下面18，在概略整個面，藉由噴射塗裝而塗敷及設置由含有50%(僅固態成分)之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚100 μm，形成光反射部22。在此狀態下，正如實施例1，僅具有：將無形成圓形狀之光反射部22之發光元件附近區域24予以並無實質設置且對應於發光元件14之大小之所對應之直徑5mm之發光元件收納用凹部20之圓形的小缺口部34。In other words, as shown in Fig. 22, the lower surface 18 other than the light-emitting element housing recess 20 of the light guiding member 16 is coated and disposed on the entire surface by spray coating to contain 50% (only The white paint composed of the titanium oxide propylene resin of the solid content was formed to have a film thickness of 100 μm to form the light reflection portion 22. In this state, as in the first embodiment, only the light-emitting element vicinity region 24 of the light-reflecting portion 22 having no circular shape is formed, and the light-emitting element having a diameter of 5 mm corresponding to the size of the light-emitting element 14 is not substantially disposed. A circular small notch portion 34 of the component housing recess 20 .

接著，在由發光元件14開始至光半透過部32之外圍端部為止之距離d2之導光構件之上面區域，藉由噴射塗裝而塗敷及設置由含有50%(僅固態成分)之二氧化鈦之丙烯樹脂之所構成之白色塗料，成為膜厚20 μm，形成光半透過部32。在此狀態下，作為光半透過部32之大小係形成更加小於前述缺口部34之大小，成為直徑4mm之光半透過部32(參考第22圖)。Next, the upper region of the light guiding member at a distance d2 from the light-emitting element 14 to the peripheral end portion of the light semi-transmissive portion 32 is applied and disposed by spray coating to contain 50% (solid content only). The white paint composed of the propylene resin of titanium dioxide has a film thickness of 20 μm to form the light semi-transmissive portion 32. In this state, the light semi-transmissive portion 32 is formed to have a size smaller than that of the notch portion 34, and is a light semi-transmissive portion 32 having a diameter of 4 mm (refer to Fig. 22).

藉此而由發光元件14正上方之擴散板之上面位置O開始，以0.5mm之距離，在每0.5cm之間隔，沿著橫方向，測定相對亮度。Thereby, the relative luminance was measured along the lateral direction at intervals of 0.5 mm from the upper position O of the diffusion plate directly above the light-emitting element 14.

將此結果，顯示在表1及第23圖之圖形。The results are shown in the graphs of Tables 1 and 23.

由表1及第23圖而明白地得知：在本發明之面光源裝置10(實施例)，比較於比較例，還更加增加對於發光元件14之正上方附近之這個以外之相對亮度，達到亮度之均勻化，此外，也改善RGB之混色。As is apparent from Table 1 and Fig. 23, in the surface light source device 10 (embodiment) of the present invention, the relative luminance other than the immediately above the light-emitting element 14 is further increased as compared with the comparative example. The uniformity of brightness, in addition, also improves the color mixing of RGB.

在以上，說明本發明之理想實施形態，但是，本發明係並非限定於這些，例如本發明之導光構件及面光源裝置係有用於構裝不同發光色之複數個之發光元件，但是，也可以構裝不需要混色之白色發光元件等，可以在並無脫離本發明目的之範圍內，進行各種之改變。In the above, a preferred embodiment of the present invention will be described. However, the present invention is not limited thereto. For example, the light guiding member and the surface light source device of the present invention are provided with a plurality of light emitting elements for constituting different luminescent colors. It is possible to construct a white light-emitting element or the like which does not require color mixing, and various changes can be made without departing from the object of the invention.

B．．．LED晶片B. . . LED chip

B1．．．光B1. . . Light

B2．．．箭號B2. . . Arrow

B3．．．光B3. . . Light

B4．．．光B4. . . Light

B5．．．光B5. . . Light

C．．．箭號C. . . Arrow

C1．．．箭號C1. . . Arrow

C2．．．箭號C2. . . Arrow

C3．．．箭號C3. . . Arrow

D．．．光D. . . Light

d1．．．距離D1. . . distance

d2．．．距離D2. . . distance

d3．．．距離D3. . . distance

E1．．．光E1. . . Light

E2．．．光E2. . . Light

E3．．．光E3. . . Light

G．．．LED晶片G. . . LED chip

R．．．LED晶片R. . . LED chip

10．．．面光源裝置10. . . Surface light source device

11．．．光半透過部11. . . Light semi-transmission

12．．．發光元件構裝用基板12. . . Light-emitting element mounting substrate

13．．．透鏡13. . . lens

14．．．發光元件14. . . Light-emitting element

16．．．導光構件16. . . Light guiding member

18．．．下面18. . . below

20．．．發光元件收納用凹部20. . . Light-emitting element housing recess

21．．．絕緣層twenty one. . . Insulation

22．．．光反射部twenty two. . . Light reflection unit

24．．．周圍附近區域twenty four. . . Nearby area

26．．．上面26. . . Above

28．．．收納用凹部28. . . Storage recess

30．．．反射鏡30. . . Reflector

32．．．光半透過部32. . . Light semi-transmission

34．．．缺口部34. . . Notch

50．．．面光源裝置(背光)50. . . Surface light source device (backlight)

51．．．背光幀框(框體)51. . . Backlight frame (frame)

52．．．LED基板(構裝基板)52. . . LED substrate (construction substrate)

53．．．發光二極體(LED)53. . . Light-emitting diode (LED)

54．．．導光構件(板、薄片)54. . . Light guiding member (plate, sheet)

55．．．擴散構件(板、薄片)55. . . Diffusion member (plate, sheet)

56．．．稜鏡薄片56. . . Thin sheet

57．．．稜鏡薄片57. . . Thin sheet

60．．．液晶顯示模組60. . . Liquid crystal display module

61．．．液晶面板61. . . LCD panel

62．．．偏光板(偏光濾光片)62. . . Polarizing plate (polarizing filter)

63．．．偏光板(偏光濾光片)63. . . Polarizing plate (polarizing filter)

100．．．背光光源100. . . Backlight source

102．．．框體102. . . framework

104．．．冷陰極管104. . . Cold cathode tube

106．．．導光構件106. . . Light guiding member

108．．．擴散薄片108. . . Diffusion sheet

110．．．液晶面板110. . . LCD panel

112．．．液晶顯示裝置112. . . Liquid crystal display device

116．．．反射部116. . . Reflection section

118．．．上面118. . . Above

200．．．背光光源200. . . Backlight source

202．．．框體202. . . framework

204．．．底面204. . . Bottom

206．．．LED燈206. . . LED light

208．．．擴散薄片208. . . Diffusion sheet

210．．．稜鏡薄片210. . . Thin sheet

212．．．側面212. . . side

214．．．反射部214. . . Reflection section

300．．．面光源裝置300. . . Surface light source device

302．．．LED燈302. . . LED light

304．．．LED燈收納凹部304. . . LED light storage recess

306．．．導光構件306. . . Light guiding member

308．．．發光元件構裝用基板308. . . Light-emitting element mounting substrate

310．．．下面310. . . below

312．．．反射部312. . . Reflection section

314．．．上面314. . . Above

第1圖係顯示適用本發明之實施形態之代表性之液晶顯示裝置之整體構造之圖。Fig. 1 is a view showing the overall configuration of a representative liquid crystal display device to which an embodiment of the present invention is applied.

第2圖係顯示適用本發明之導光構件之本發明之面光源裝置之第1實施形態之俯視圖。Fig. 2 is a plan view showing a first embodiment of the surface light source device of the present invention to which the light guiding member of the present invention is applied.

第3圖係在第2圖之A－A線之部分擴大剖面圖。Fig. 3 is an enlarged cross-sectional view taken along line A-A of Fig. 2.

第4圖係顯示由LED開始至橫方向之距離和相對亮度之圖形。Figure 4 is a graph showing the distance from the LED to the lateral direction and the relative brightness.

第5圖係呈示意地顯示並無設置本發明之導光構件之光反射部之發光元件附近區域之形狀之俯視圖。Fig. 5 is a plan view schematically showing the shape of a region in the vicinity of a light-emitting element in which the light-reflecting portion of the light guiding member of the present invention is not provided.

第6圖係呈示意地顯示並無設置本發明之導光構件之光反射部之發光元件附近區域之形狀之俯視圖。Fig. 6 is a plan view schematically showing the shape of a region in the vicinity of the light-emitting element in which the light-reflecting portion of the light guiding member of the present invention is not provided.

第7圖係顯示本發明之面光源裝置之第2實施形態之概略剖面圖。Fig. 7 is a schematic cross-sectional view showing a second embodiment of the surface light source device of the present invention.

第8圖係顯示適用本發明之其他實施形態之導光構件之本發明之第3實施形態之俯視圖。Fig. 8 is a plan view showing a third embodiment of the present invention to which a light guiding member according to another embodiment of the present invention is applied.

第9圖係在第8圖之A－A線之部分擴大剖面圖。Fig. 9 is an enlarged cross-sectional view taken along line A-A of Fig. 8.

第10圖係顯示適用本發明之其他實施形態之導光構件之本發明之面光源裝置之第4實施形態之俯視圖。Fig. 10 is a plan view showing a fourth embodiment of the surface light source device of the present invention to which the light guiding member according to another embodiment of the present invention is applied.

第11圖係顯示適用本發明之其他實施形態之導光構件之本發明之面光源裝置之第5實施形態之俯視圖。Fig. 11 is a plan view showing a fifth embodiment of the surface light source device of the present invention to which the light guiding member according to another embodiment of the present invention is applied.

第12圖係顯示適用本發明之導光構件之本發明之面光源裝置之第6實施形態之俯視圖。Fig. 12 is a plan view showing a sixth embodiment of the surface light source device of the present invention to which the light guiding member of the present invention is applied.

第13圖係在第12圖之A－A線之部分擴大剖面圖。Figure 13 is an enlarged cross-sectional view taken along line A-A of Fig. 12.

第14圖係呈示意地顯示並無設置本發明之導光構件之光反射部之發光元件附近區域之形狀之俯視圖。Fig. 14 is a plan view schematically showing the shape of a region in the vicinity of the light-emitting element in which the light-reflecting portion of the light guiding member of the present invention is not provided.

第15圖係呈示意地顯示並無設置本發明之導光構件之光反射部之發光元件附近區域之形狀之俯視圖。Fig. 15 is a plan view schematically showing the shape of a region in the vicinity of the light-emitting element in which the light-reflecting portion of the light guiding member of the present invention is not provided.

第16圖係顯示本發明之面光源裝置之第7實施形態之概略剖面圖。Fig. 16 is a schematic cross-sectional view showing a seventh embodiment of the surface light source device of the present invention.

第17圖係顯示適用本發明之其他實施形態之導光構件之本發明之面光源裝置之第8實施形態之俯視圖。Fig. 17 is a plan view showing an eighth embodiment of the surface light source device of the present invention to which the light guiding member according to another embodiment of the present invention is applied.

第18圖係顯示適用本發明之實施例1之導光構件之本發明之面光源裝置之俯視圖。Fig. 18 is a plan view showing a surface light source device of the present invention to which the light guiding member of the first embodiment of the present invention is applied.

第19圖係顯示適用本發明之實施例2之導光構件之本發明之面光源裝置之俯視圖。Fig. 19 is a plan view showing the surface light source device of the present invention to which the light guiding member of the second embodiment of the present invention is applied.

第20圖係顯示適用本發明之實施例3之導光構件之本發明之面光源裝置之俯視圖。Figure 20 is a plan view showing a surface light source device of the present invention to which the light guiding member of Embodiment 3 of the present invention is applied.

第21圖係顯示適用本發明之比較例1之導光構件之本發明之面光源裝置之俯視圖。Fig. 21 is a plan view showing a surface light source device of the present invention to which the light guiding member of Comparative Example 1 of the present invention is applied.

第22圖係顯示適用本發明之比較例2之導光構件之本發明之面光源裝置之俯視圖。Fig. 22 is a plan view showing the surface light source device of the present invention to which the light guiding member of Comparative Example 2 of the present invention is applied.

第23圖係顯示本發明之實施例及比較例之由發光元件14開始至橫方向之距離和相對亮度之圖形。Fig. 23 is a view showing the distance from the light-emitting element 14 to the lateral direction and the relative luminance in the examples and comparative examples of the present invention.

第24圖係顯示習知之邊光型之背光光源之概略剖面圖。Figure 24 is a schematic cross-sectional view showing a conventional edge light type backlight source.

第25圖係顯示習知之正下方型之背光光源之概略剖面圖。Figure 25 is a schematic cross-sectional view showing a conventional backlight source of the type below.

第26圖係顯示習知之面光源裝置之概略剖面圖。Figure 26 is a schematic cross-sectional view showing a conventional surface light source device.

C．．．箭號C. . . Arrow

d1．．．距離D1. . . distance

10．．．面光源裝置10. . . Surface light source device

12．．．發光元件構裝用基板12. . . Light-emitting element mounting substrate

14．．．發光元件14. . . Light-emitting element

16．．．導光構件16. . . Light guiding member

18．．．下面18. . . below

20．．．發光元件收納用凹部20. . . Light-emitting element housing recess

22．．．光反射部twenty two. . . Light reflection unit

24．．．周圍附近區域twenty four. . . Nearby area

26．．．上面26. . . Above

Claims (16)

一種導光構件，係配置在構裝發光元件之發光元件構裝用基板之上面而用以擴散來自發光元件之光來導光至上方的導光構件，其特徵為：前述導光構件，具備：被設在對應於前述發光元件的位置之發光元件用凹部，在前述發光元件的周圍較遠處之前述導光構件之下面的光反射部，以及在前述發光元件之周圍附近之前述導光構件之下面之未設置光反射部之部分；前述導光構件的下面之未設置光反射部之部分，於離開前述發光元件的方向上，超過被形成於前述導光構件的前述發光元件用凹部而擴開。 A light guiding member is disposed on a light-emitting element mounting substrate on which a light-emitting element is mounted, and diffuses light from the light-emitting element to guide the light guiding member upward, wherein the light guiding member is provided a light-emitting element recessed portion provided at a position corresponding to the light-emitting element, a light reflecting portion on a lower surface of the light guiding member farther around the light-emitting element, and the light guiding portion in the vicinity of the periphery of the light-emitting element a portion of the lower surface of the member where the light reflecting portion is not provided; and a portion of the lower surface of the light guiding member where the light reflecting portion is not provided, exceeds the concave portion of the light emitting element formed in the light guiding member in a direction away from the light emitting element And expand. 如申請專利範圍第1項所記載之導光構件，其中在前述發光元件用凹部之凹面之某一部分，設置光半透過部。 The light guiding member according to the first aspect of the invention, wherein the light semi-transmissive portion is provided in a part of the concave surface of the concave portion for the light-emitting element. 如申請專利範圍第2項所記載之導光構件，其中，前述凹面之光半透過部係設置在前述發光元件之上方。 The light guiding member according to claim 2, wherein the light semi-transmissive portion of the concave surface is provided above the light emitting element. 如申請專利範圍第1至2項中任一項所記載之導光構件，其中，前述發光元件之周圍附近區域係由發光元件開始至均勻之距離為止之區域。 The light guiding member according to any one of claims 1 to 2, wherein the vicinity of the periphery of the light-emitting element is a region from the light-emitting element to a uniform distance. 如申請專利範圍第1至2項中任一項所記載之導光構件，其中，構成在前述發光元件之周圍附近區域，形成點形狀之光反射部，越加接近發光元件而使得點密度越加變低。 The light guiding member according to any one of the first to second aspects of the present invention, wherein a light reflecting portion having a dot shape is formed in a vicinity of a periphery of the light emitting element, and the point density is increased as the light emitting element is closer to the light emitting element. The increase is low. 如申請專利範圍第1項所記載之導光構件，其中，在對應於前述導光構件之上面之發光元件之位置，設置光半透過部。 The light guiding member according to claim 1, wherein the light semi-transmissive portion is provided at a position corresponding to the light-emitting element on the upper surface of the light guiding member. 如申請專利範圍第6項所記載之導光構件，其中，前述之光半透過部係形成在前述導光構件之上面之發光元件之正上方之位置。 The light guiding member according to claim 6, wherein the light semi-transmissive portion is formed at a position directly above the light-emitting element on the upper surface of the light guiding member. 如申請專利範圍第7項所記載之導光構件，其中，前述之光半透過部係在前述導光構件之上面，由發光元件開始至均勻之距離為止而設置在發光元件之周圍附近。 The light guiding member according to claim 7, wherein the light semi-transmissive portion is provided on the upper surface of the light guiding member, and is disposed near the periphery of the light emitting element from the light emitting element to a uniform distance. 如申請專利範圍第1、2、6、7或8項中任一項所記載之導光構件，其中，構裝於前述發光元件構裝用基板之發光元件係離開而設置複數個，在對應於這個之複數個之前述導光構件之下面位置，具有未設置前述光反射部之發光元件之周圍附近區域；前述發光元件之各部，被配置於形成在前述導光構件的對應的發光元件用凹部之中，未形成前述光反射部之發光元件的周圍附近區域之各個，於離開前述發光元件的方向上，超過被形成於導光構件的凹部而擴開。 The light guide member according to any one of the first aspect of the invention, wherein the light-emitting element mounted on the substrate for the light-emitting element assembly is separated from the light-emitting element, and a plurality of At a position below the plurality of light guiding members, there is a region around the periphery of the light-emitting element in which the light reflecting portion is not provided, and each of the light-emitting elements is disposed in a corresponding light-emitting element formed in the light guiding member. Among the concave portions, each of the regions in the vicinity of the vicinity of the light-emitting elements in which the light-reflecting portions are not formed is expanded beyond the concave portion formed in the light guiding member in a direction away from the light-emitting elements. 如申請專利範圍第9項所記載之導光構件，其中，在前述複數個發光元件之所鄰接之發光元件之離開間隔成為D而由一直到未設置前述光反射部之發光元件之周圍附近區域外圍端部為止之發光元件開始之均勻之距離成為d之時，成為D/4≧d。 The light guiding member according to claim 9, wherein a distance between the adjacent light emitting elements of the plurality of light emitting elements is D, and a region around the periphery of the light emitting element in which the light reflecting portion is not provided When the uniform distance from the light-emitting element at the peripheral end becomes d, it becomes D/4≧d. 如申請專利範圍第1、2、6、7或8項中任一項所記載之導光構件，其中，構裝於前述發光元件構裝用基板之發光元件係由組合不同之發光色之複數種類之發光元件之單位發光元件而構成，對應於前述之單位發光元件而具有未設置前述光反射部之發光元件之周圍附近區域。 The light guiding member according to any one of the first, second, sixth, seventh or eighth aspect of the invention, wherein the light-emitting element of the light-emitting element mounting substrate is composed of a plurality of different luminescent colors The unit light-emitting element of the light-emitting element of the type is configured to have a region around the periphery of the light-emitting element in which the light-reflecting portion is not provided, corresponding to the unit light-emitting element. 如申請專利範圍第1項所記載之導光構件，其中，構裝於前述發光元件構裝用基板之發光元件係由組合不同之發光色之複數種類之發光元件之單位發光元件而構成，對應於前述之單位發光元件而形成發光元件用凹部。 The light guide member according to the first aspect of the invention, wherein the light-emitting element of the light-emitting element assembly substrate is composed of a unit light-emitting element that combines a plurality of types of light-emitting elements having different light-emitting colors, corresponding to A concave portion for a light-emitting element is formed in the unit light-emitting element described above. 一種面光源裝置，其特徵為：在構裝發光元件之發光元件構裝用基板之上面，配置如申請專利範圍第1至12項中任一項所記載之導光構件。 A surface light source device according to any one of claims 1 to 12, wherein a light guide member according to any one of claims 1 to 12 is disposed on a light-emitting element assembly substrate on which a light-emitting element is mounted. 如申請專利範圍第13項所記載之面光源裝置，其中，前述之發光元件係發光二極體。 The surface light source device according to claim 13, wherein the light-emitting element is a light-emitting diode. 一種顯示裝置，其特徵為：在如申請專利範圍第13或14項所記載之面光源裝置之上面，配置顯示部。 A display device characterized in that a display portion is disposed on a surface of a surface light source device according to claim 13 or 14. 如申請專利範圍第15項所記載之顯示裝置，其中，前述之顯示部係液晶面板。The display device according to claim 15, wherein the display unit is a liquid crystal panel.
TW095143574A 2005-11-30 2006-11-24 Light guide member, planar light source device provided with the light guide member, and display apparatus using the planar light source device TWI396015B (en)

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