TWI722799B - Surface light source apparatus and liquid crystal display device - Google Patents

Surface light source apparatus and liquid crystal display device Download PDF

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TWI722799B
TWI722799B TW109105427A TW109105427A TWI722799B TW I722799 B TWI722799 B TW I722799B TW 109105427 A TW109105427 A TW 109105427A TW 109105427 A TW109105427 A TW 109105427A TW I722799 B TWI722799 B TW I722799B
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light
light source
guide plate
light guide
source device
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TW109105427A
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TW202036938A (en
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本倉紗希
澤中智彦
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日商三菱電機股份有限公司
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    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention provides a surface light source apparatus and a liquid crystal display device that have a wide color reproduction range. The surface light source apparatus includes: a light source section 7 comprised of a light guide plate 9, a light source 8, a first reflection member 10 and a second reflection member 11, wherein the light guide plate 9 includes a light incident surface 17 provided on an inner wall of a cutout portion 16 formed by cutting out a light guide body 15 and a plurality of light diffusion portions 20 for deflecting light in the light guide body 15 that are formed on a light exit surface 19 formed on a surface of the light guide body 15, wherein the light source 8 is comprised of a plurality of light emitters 12 emitting light of different colors and is provided on an inner side of the cutout portion 16, wherein the first reflection member 10 is configured to cover an entirety of the cutout portion 16 from the side of the light exit surface 19, and wherein the second reflection member 11 is disposed on a side surface 18 of the light guide plate 9; a reflection section 6 in the shape of a hollow box, with a surface having an opening 63 and an inner surface acting as a reflection surface, and a plurality of the light source sections 7 being provided on an entirety of an inner side of a bottom surface 61 of the box by abutting a surface opposite to the light exit surface 19 with the inner side of the bottom surface 61 of the box; and a diffusion plate 5 configured to scatter transmitted light and cover the opening 63.

Description

面光源裝置及液晶顯示裝置Surface light source device and liquid crystal display device

本發明係關於面光源裝置及液晶顯示裝置。The present invention relates to a surface light source device and a liquid crystal display device.

近年來，伴隨著4K8K播送的開始，與4K8K播送對應的液晶顯示裝置增加了起來。與4K8K播送對應的液晶顯示裝置必須具有比以往的液晶顯示裝置更高的解析度，此外，由於穿透液晶面板的光的透射率會降低，所以需要有能夠照射更多光量的背光單元。In recent years, with the start of 4K8K broadcasting, liquid crystal display devices corresponding to 4K8K broadcasting have increased. The liquid crystal display device corresponding to 4K8K broadcasting must have a higher resolution than the conventional liquid crystal display device. In addition, since the transmittance of light penetrating the liquid crystal panel is reduced, a backlight unit capable of irradiating more light is required.

再者，與4K8K播送對應的液晶顯示裝置伴隨著高解析度而大型化。伴隨著液晶顯示裝置的大型化，必須改善液晶面板顯示之影像的對比(contrast)，因此，與4K8K播送對應的液晶顯示裝置正廣泛使用所謂區域調光(local dimming)之技術。順帶一提，所謂區域調光，係在將發光區域分割成複數個區域的液晶顯示裝置的背光單元中，依照各個區域控制要照射之光量的技術。Furthermore, a liquid crystal display device compatible with 4K8K broadcasting has increased in size with high resolution. With the increase in the size of liquid crystal display devices, it is necessary to improve the contrast of the images displayed on the liquid crystal panel. Therefore, liquid crystal display devices corresponding to 4K8K broadcasting are widely using so-called local dimming technology. Incidentally, the so-called area dimming is a technology that controls the amount of light to be irradiated in accordance with each area in the backlight unit of a liquid crystal display device that divides the light-emitting area into a plurality of areas.

因此，與4K8K播送對應的液晶顯示裝置通常採用能夠並排更多的光源且適用於區域調光的直下型的背光單元。順帶一提，所謂直下型的背光單元，係鋪設有複數個發光二極體(Lihgt Emitting Diode：以下簡稱LED)，而將光照射於液晶面板之整個背面的背光單元。Therefore, a liquid crystal display device corresponding to 4K8K broadcasting usually adopts a direct-type backlight unit that can line up more light sources and is suitable for area dimming. By the way, the so-called direct type backlight unit is a backlight unit that is laid with a plurality of light emitting diodes (Lihgt Emitting Diode: hereinafter referred to as LED) and irradiates light on the entire back of the liquid crystal panel.

例如，專利文獻1係採用直下型的背光，藉由抵接於發光元件的光學構件以良好精度地使從發光元件射出的光反射及折射，而將亮度經均勻化的光照射於作為被照射體的液晶面板。 [先前技術文獻] [專利文獻]For example, Patent Document 1 adopts a direct type backlight, and the light emitted from the light-emitting element is reflected and refracted with good accuracy by an optical member abutting on the light-emitting element, and light with uniform brightness is irradiated as the illuminated light. Body of LCD panel. [Prior Technical Literature] [Patent Literature]

(專利文獻1) 日本特開2012-216764號(Patent Document 1) Japanese Patent Application Publication No. 2012-216764

（發明所欲解決之課題）(The problem to be solved by the invention)

然而， 專利文獻1由於未考量到背光之發光元件的混色，所以存在有一旦使用複數個色純度較高的發光元件來取代白色LED時，會發生色彩不均勻，難以擴大色彩還原範圍的問題點。However, Patent Document 1 does not consider the color mixing of the light-emitting elements of the backlight. Therefore, once a plurality of light-emitting elements with high color purity are used to replace the white LED, color unevenness occurs and it is difficult to expand the color reproduction range. .

本發明係用以解決上述的問題而完成者，目的在於提供即使使用複數個色純度較高的發光體也可抑制色彩不均勻，且色彩還原範圍較廣的面光源裝置及液晶顯示裝置。 （解決課題之手段）The present invention was completed to solve the above-mentioned problems, and its object is to provide a surface light source device and a liquid crystal display device that can suppress color unevenness and have a wide color reproduction range even if a plurality of light-emitting bodies with high color purity are used. (Means to solve the problem)

本發明的面光源裝置，係具備：光源部，該光源部係具有導光板、光源、第一反射構件及第二反射構件，該導光板係具有：由光會穿透的材料所形成的導光體，切除導光體之一部分所形成的切除部，形成在切除部的內壁且供光射入導光體之內部的光入射面，形成在導光體的一面且將光從導光體朝外射出的光出射面，以及形成在導光體且使導光體內的光朝光出射面偏轉的光擴散部，該光源係以會發出不同顏色之光的複數個發光體構成，且設於切除部的內側，且配置成使射出從發光體所發出的光的發光面與光入射面相對向，該第一反射構件係將光反射，且以從光出射面側將切除部全部覆蓋的方式所設置，該第二反射構件係將光反射，且設於導光板的側面；反射部，係於一面形成有開口部且其內面成為反射面之中空的箱型形狀，且以使光源部之光出射面之相反側的面與箱型形狀之底面的內側抵接的方式，於底面的內側整體設置複數個光源部；以及擴散板，係使穿透的光散射，且以覆蓋反射部之開口部的方式配置。 此外，本發明的液晶顯示裝置，係具備：面光源裝置；液晶面板，係將光轉換成影像光；以及光學薄片，係使面光源裝置所射出的光朝向液晶面板之顯示面的法線方向，或使面光源裝置所射出的光擴散。 [發明的功效]The surface light source device of the present invention includes: a light source unit having a light guide plate, a light source, a first reflecting member, and a second reflecting member, and the light guide plate has: a light guide formed of a material through which light can penetrate The light body, the cut part formed by cutting off a part of the light guide body, is formed on the inner wall of the cut part and supplies light into the light incident surface of the light guide body, is formed on one side of the light guide body and guides light from the light The light exit surface from which the body is projected outward, and the light diffuser formed in the light guide body to deflect the light in the light guide toward the light exit surface. The light source is composed of a plurality of luminous bodies that emit light of different colors, and It is provided on the inner side of the cutout and is arranged so that the light-emitting surface that emits light emitted from the light-emitting body faces the light incident surface. The first reflecting member reflects the light, and the cutout is completely removed from the light-emitting surface side. The second reflecting member reflects light and is arranged on the side surface of the light guide plate; the reflecting part is a box-shaped shape with an opening formed on one side and the inner surface of the reflecting surface is hollow. In such a way that the surface on the opposite side of the light exit surface of the light source part is in contact with the inner side of the bottom surface of the box shape, a plurality of light source parts are arranged on the whole inner side of the bottom surface; It is arranged to cover the opening of the reflecting part. In addition, the liquid crystal display device of the present invention includes: a surface light source device; a liquid crystal panel that converts light into image light; and an optical sheet that directs the light emitted by the surface light source device toward the normal direction of the display surface of the liquid crystal panel , Or diffuse the light emitted by the surface light source device. [Effect of Invention]

本發明係具有光源部，該光源部所具有之光源係具有以複數個發光色所構成的複數個發光體，且該光源部所具有之導光板係調整從光源射出之光的強度，藉此能夠抑制色彩不均勻且擴大色彩還原範圍。The present invention is provided with a light source part, the light source part of the light source part has a plurality of luminous bodies composed of a plurality of luminous colors, and the light guide plate of the light source part adjusts the intensity of the light emitted from the light source, thereby It can suppress color unevenness and expand the range of color reproduction.

實施形態1 針對本發明的實施形態1之面光源裝置及液晶顯示裝置進行說明。如第1圖所示，液晶顯示裝置100具備：具有液晶層之穿透型的液晶面板1、光學薄片2及面光源裝置200。液晶面板1係設於液晶顯示裝置100的前表面。光學薄片2係設於液晶面板1之背面1b側，且具有第一光學薄片3及第二光學薄片4。液晶面板1的背面1b依序配置有第一光學薄片3、第二光學薄片4、面光源裝置200。因此，面光源裝置200能夠通過第二光學薄片4及第一光學薄片3而朝向液晶面板1的背面1b照射光。Embodiment 1 The surface light source device and the liquid crystal display device of Embodiment 1 of the present invention will be described. As shown in FIG. 1, the liquid crystal display device 100 includes a transmissive liquid crystal panel 1 having a liquid crystal layer, an optical sheet 2, and a surface light source device 200. The liquid crystal panel 1 is provided on the front surface of the liquid crystal display device 100. The optical sheet 2 is provided on the back 1b side of the liquid crystal panel 1 and has a first optical sheet 3 and a second optical sheet 4. The back surface 1b of the liquid crystal panel 1 is provided with a first optical sheet 3, a second optical sheet 4, and a surface light source device 200 in this order. Therefore, the surface light source device 200 can irradiate light toward the back surface 1 b of the liquid crystal panel 1 through the second optical sheet 4 and the first optical sheet 3.

液晶面板1係呈矩形形狀，可將從面光源裝置200照射的光轉換成影像光。所謂「影像光」係指具有影像資訊的光。液晶面板1具有將影像顯示於前表面的顯示面1a。顯示面1a呈矩形形狀，顯示面1a之鄰接的兩個邊呈正交。再者，雖然未圖示液晶面板1的液晶層，惟液晶面板1的液晶層係做成為與顯示面1a平行的面狀的構造。此外，本實施形態中，雖說明將顯示面1a的形狀設為矩形形狀，然而，顯示面1a的形狀也可為其他的形狀。The liquid crystal panel 1 has a rectangular shape, and can convert the light irradiated from the surface light source device 200 into image light. The so-called "image light" refers to light with image information. The liquid crystal panel 1 has a display surface 1a that displays an image on the front surface. The display surface 1a has a rectangular shape, and two adjacent sides of the display surface 1a are orthogonal. In addition, although the liquid crystal layer of the liquid crystal panel 1 is not shown, the liquid crystal layer of the liquid crystal panel 1 has a planar structure parallel to the display surface 1a. In addition, in this embodiment, although it is demonstrated that the shape of the display surface 1a is a rectangular shape, the shape of the display surface 1a may be another shape.

再者，本實施形態中，為使說明容易，於各圖中顯示正交座標系的座標軸。通常，液晶顯示裝置100係將液晶面板1的長邊方向呈水平的方式配置，因此，當將液晶面板1的短邊方向設為x軸方向，長邊方向設為y軸方向，與屬於包含x軸及y軸之平面的x－y平面垂直的方向設為z軸方向時，x軸表示上下方向，y軸表示從液晶面板1的顯示面1a側來看為左右方向，z軸表示液晶顯示裝置100的縱深方向。此外，第1圖係從由顯示面1a側觀看時之右側面觀看液晶顯示裝置100的圖，因此，x軸方向成為第1圖的上下方向，y軸方向成為與描繪有第1圖之紙面垂直的方向，z軸成為第1圖的左右方向。Furthermore, in the present embodiment, in order to facilitate the description, the coordinate axis of the orthogonal coordinate system is shown in each figure. Generally, the liquid crystal display device 100 is arranged such that the long side direction of the liquid crystal panel 1 is horizontal. Therefore, when the short side direction of the liquid crystal panel 1 is set as the x-axis direction, and the long side direction is set as the y-axis direction, it is considered as including When the direction perpendicular to the x-y plane of the x-axis and y-axis plane is set as the z-axis direction, the x-axis represents the vertical direction, the y-axis represents the left-right direction when viewed from the display surface 1a side of the liquid crystal panel 1, and the z-axis represents the liquid crystal The depth direction of the display device 100. In addition, Fig. 1 is a view of the liquid crystal display device 100 viewed from the right side when viewed from the display surface 1a side. Therefore, the x-axis direction becomes the vertical direction of the first figure, and the y-axis direction corresponds to the paper surface where the first figure is drawn. In the vertical direction, the z-axis becomes the left-right direction in Figure 1.

再者，從液晶面板1之顯示面1a側來看，將左側設為＋y軸方向，將右側設為－y軸方向。亦即，朝向描繪有第1圖之紙面的方向成為＋y軸方向。再者，將上側設為＋x軸方向，下側設為－x軸方向，液晶面板1的顯示面1a側設為＋z軸方向，液晶面板1的背面1b側設為－z軸方向。In addition, when viewed from the display surface 1a side of the liquid crystal panel 1, the left side is the +y-axis direction, and the right side is the -y-axis direction. That is, the direction toward the paper surface on which the first figure is drawn becomes the +y-axis direction. In addition, the upper side is the +x axis direction, the lower side is the −x axis direction, the display surface 1a side of the liquid crystal panel 1 is the +z axis direction, and the back surface 1b side of the liquid crystal panel 1 is the −z axis direction.

第一光學薄片3藉由使從面光源裝置200照射的光擴散而抑制亮度不均勻等光的亮度局部性地存在的情形。The first optical sheet 3 diffuses the light irradiated from the surface light source device 200, thereby suppressing a situation where the brightness of the light is locally present such as uneven brightness.

第二光學薄片4的表面被施加了加工，而具有使從面光源裝置200發射的光朝向液晶面板1之顯示面1a的法線方向的功能。The surface of the second optical sheet 4 is processed, and has a function of directing the light emitted from the surface light source device 200 toward the normal direction of the display surface 1 a of the liquid crystal panel 1.

面光源裝置200如第1圖所示，於成為面光源裝置200的前表面之面光源裝置200的＋z軸方向側具有擴散板5，於成為面光源裝置200的底面之面光源裝置200的－z軸方向側具有反射部6。再者，面光源裝置200於反射部6的底面61的內側具有複數個光源部7。從光源部7射出的光穿透擴散板5之後從面光源裝置200射出至外部。As shown in FIG. 1, the surface light source device 200 has a diffuser 5 on the +z-axis direction side of the surface light source device 200 that becomes the front surface of the surface light source device 200, and the surface light source device 200 that becomes the bottom surface of the surface light source device 200- The reflection part 6 is provided on the z-axis direction side. Furthermore, the surface light source device 200 has a plurality of light source parts 7 inside the bottom surface 61 of the reflection part 6. The light emitted from the light source unit 7 penetrates the diffusion plate 5 and then is emitted from the surface light source device 200 to the outside.

光源部7具有複數個光源8、導光板9、第一反射構件10及第二反射構件11。如第2圖所示，複數個光源部7係以圍棋盤之格的方式鋪設於反射部6之底面61的內側整體。此外，藉由複數個光源部7以圍棋盤之格的方式鋪設，在各光源部7的範圍內能夠進行區域調光。The light source unit 7 has a plurality of light sources 8, a light guide plate 9, a first reflection member 10 and a second reflection member 11. As shown in FIG. 2, a plurality of light source parts 7 are laid on the entire inner side of the bottom surface 61 of the reflection part 6 in a grid pattern. In addition, by laying a plurality of light source units 7 in a grid pattern, it is possible to perform area dimming within the range of each light source unit 7.

擴散板5將穿透的光擴散，亦即使光散射。擴散板5可為例如薄板形狀，可為薄片狀，也可為形成在基板上的膜狀。此外，基板係例如以穿透光之透明的板等所構成。The diffuser plate 5 diffuses the penetrating light even if the light is scattered. The diffusion plate 5 may be, for example, a thin plate shape, a sheet shape, or a film shape formed on a substrate. In addition, the substrate is composed of, for example, a transparent plate that transmits light.

如第1圖所示，反射部6係以呈矩形形狀之一個底面61與設於底面61之周圍的四個側面62所構成。底面61為與x－y平面平行的面，四個側面62係連接於底面61的各邊。反射部6係於成為與反射部6之底面61相對向的前表面之反射部6的＋z軸方向側形成有開口部63。因此，反射部6呈一面形成有開口部63之中空的箱型形狀。此外，擴散板5係以覆蓋反射部6之開口部63的方式配置。亦即，擴散板5相當於反射部6的蓋。As shown in FIG. 1, the reflecting portion 6 is composed of a bottom surface 61 having a rectangular shape and four side surfaces 62 provided around the bottom surface 61. The bottom surface 61 is a surface parallel to the x-y plane, and the four side surfaces 62 are connected to each side of the bottom surface 61. The reflection part 6 has an opening 63 formed on the +z-axis direction side of the reflection part 6 that is the front surface facing the bottom surface 61 of the reflection part 6. Therefore, the reflection part 6 has a box shape in which an opening 63 is formed on one side. In addition, the diffuser plate 5 is arranged so as to cover the opening 63 of the reflection part 6. That is, the diffuser plate 5 corresponds to the cover of the reflection part 6.

如第1圖及第2圖所示，反射部6的四個側面62之中，具有底面61之與y軸方向平行的邊之側面62a及側面62b，係以其相互的間隔從底面61側朝向屬於開口部63側的方向之＋z軸方向變寬的方式傾斜。亦即，具有底面61之與y軸方向平行之邊之－x軸方向側的側面62a，係相對於y－z平面，從－y軸方向觀看時以與底面61的接觸部分為中心朝反時鐘方向旋轉，而具有底面61之與y軸方向平行之邊之＋x軸方向側的側面62b，係相對於y－z平面，從－y軸方向觀看時以與底面61的接觸部分為中心朝順時鐘方向旋轉。As shown in Figures 1 and 2, among the four side surfaces 62 of the reflecting portion 6, the side surfaces 62a and 62b having sides parallel to the y-axis direction of the bottom surface 61 are separated from the bottom surface 61 side. It is inclined so as to widen in the +z-axis direction, which is the direction belonging to the opening 63 side. That is, the side surface 62a on the -x-axis direction side that has the side parallel to the y-axis direction of the bottom surface 61 is opposite to the yz plane with the contact portion with the bottom surface 61 as the center when viewed from the -y-axis direction. The clock direction rotates, and the side surface 62b on the +x-axis direction with the side parallel to the y-axis direction of the bottom surface 61 is relative to the yz plane, and when viewed from the -y-axis direction, it faces the contact portion with the bottom surface 61 as the center Rotate clockwise.

再者，反射部6的四個側面62之中，具有底面61之與x軸方向平行的邊之側面62c及側面62d，係以其相互的間隔從底面61側朝向屬於開口部63側的方向之＋z軸方向變寬的方式傾斜。亦即，具有底面61之與x軸方向平行之邊之－y軸方向側的側面62c，係相對於z－x平面，從＋x軸方向觀看時以與底面61的接觸部分設為中心朝反時鐘方向旋轉，而具有底面61之與x軸方向平行之邊之＋y軸方向側的側面62d，係相對於z－x平面，從＋x軸方向觀看時以與底面61的接觸部分設為中心朝順時鐘方向旋轉。Furthermore, among the four side surfaces 62 of the reflecting portion 6, the side surface 62c and the side surface 62d having sides parallel to the x-axis direction of the bottom surface 61 are spaced from the bottom surface 61 side toward the direction belonging to the opening portion 63 side. It is inclined in a way that the +z axis direction widens. That is, the side surface 62c on the -y-axis direction side that has the side parallel to the x-axis direction of the bottom surface 61 is opposite to the z-x plane when viewed from the +x-axis direction with the contact portion with the bottom surface 61 as the center The clock direction rotates, and the side surface 62d on the +y-axis direction side with the side parallel to the x-axis direction of the bottom surface 61 is relative to the z-x plane. When viewed from the +x-axis direction, the contact portion with the bottom surface 61 is set as the center Rotate clockwise.

反射部6係以會將光反射的構件所構成，至少反射部6的內面側形成會將光反射的反射面。亦即，反射部6之底面61之內側的面及側面62之內側的面成為反射面。由於側面62係以朝向＋z軸方向變寬的方式傾斜，所以側面62的反射面係朝向＋z軸方向。此外，反射部6的反射面也可為例如擴散反射面。The reflection part 6 is composed of a member that reflects light, and at least the inner surface of the reflection part 6 forms a reflection surface that reflects light. In other words, the inner surface of the bottom surface 61 and the inner surface of the side surface 62 of the reflecting portion 6 serve as reflecting surfaces. Since the side surface 62 is inclined so as to widen in the +z-axis direction, the reflecting surface of the side surface 62 is oriented in the +z-axis direction. In addition, the reflection surface of the reflection portion 6 may be, for example, a diffuse reflection surface.

再者，反射部6能夠採用由聚對苯二甲酸乙二酯等樹脂所形成的光反射薄片或使金屬蒸鍍於基板的表面而成的光反射薄片等。In addition, the reflection part 6 can use the light reflection sheet formed by resin, such as polyethylene terephthalate, or the light reflection sheet which vapor-deposited metal on the surface of a board|substrate, etc., and the like.

如第3圖所示，光源8係由基體部13與複數個發光體12所構成，複數個發光體12係以呈一體的方式設置於插座，如以透明樹脂成形而封裝化。光源8係於基體部13之某一面形成有比經封裝化之複數個發光體12更大幅地凹陷而成的凹陷部，經封裝化之複數個發光體12係配置於凹陷部之中。As shown in Fig. 3, the light source 8 is composed of a base portion 13 and a plurality of light-emitting bodies 12, and the plurality of light-emitting bodies 12 are integrally installed in the socket, such as being packaged by a transparent resin molding. The light source 8 is formed with a concave portion that is more dented than the encapsulated plurality of luminous bodies 12 on a certain surface of the base portion 13, and the encapsulated plurality of luminous bodies 12 are arranged in the concave portion.

從複數個發光體12之各個發光體發出的光，從凹陷部的開口朝向凹陷部的外側射出光。在此為便於說明，將光從光源8射出至外部之基體部13上的區域稱為發光面14。此外，本實施形態係以發光面14及凹陷部內並無任何東西的狀態進行說明，惟也可例如於發光面14設置透明的板狀的窗，或以透明的材料將發光面14與凹陷部整體地密封的方式來構成。由於從發光面14射出的光中，相對於發光面14朝垂直方向射出的光的強度最高，所以將通過發光面14的中心而相對於發光面14呈垂直的軸設為光軸C。The light emitted from each of the plurality of luminous bodies 12 emits light from the opening of the recessed portion toward the outside of the recessed portion. Here, for convenience of description, the area on the base portion 13 where the light is emitted from the light source 8 to the outside is referred to as the light-emitting surface 14. In addition, the present embodiment is described in a state where there is nothing in the light-emitting surface 14 and the recessed portion, but it is also possible to provide a transparent plate-shaped window on the light-emitting surface 14, or to combine the light-emitting surface 14 and the recessed portion with a transparent material. It is constructed in an integrally sealed manner. Since the light emitted from the light emitting surface 14 has the highest intensity of light emitted in the vertical direction with respect to the light emitting surface 14, the axis passing through the center of the light emitting surface 14 and perpendicular to the light emitting surface 14 is referred to as the optical axis C.

複數個發光體12係例如以發光體12a、12b、12c所構成。發光體12a、12b、12c係各自會發出不同色彩之光者，且能夠以各自獨立的方式控制發光的有無或強度等。例如，藉由將發光體12a設為紅色發光體，發光體12b設為綠色發光體，發光體12c設為藍色發光體，而能夠從光源8射出具有範圍寬廣之色彩的光。此外，發光體12a、12b、12c的配置順序也可變換。再者，本實施形態中，說明發光體的數量為三個，惟發光體的數量並非限定為三個。例如，也可於前述三個發光體之外更追加會發出白色的光的發光體。The plurality of luminous bodies 12 is composed of, for example, luminous bodies 12a, 12b, and 12c. The luminous bodies 12a, 12b, and 12c each emit light of different colors, and can control the presence or absence or intensity of light emission in an independent manner. For example, by setting the luminous body 12a as a red luminous body, the luminous body 12b as a green luminous body, and the luminous body 12c as a blue luminous body, light with a wide range of colors can be emitted from the light source 8. In addition, the arrangement order of the luminous bodies 12a, 12b, and 12c may also be changed. Furthermore, in this embodiment, the number of luminous bodies is described as three, but the number of luminous bodies is not limited to three. For example, a light-emitting body that emits white light may be added to the aforementioned three light-emitting bodies.

導光板9具有以會穿透光之材料形成的導光體15。導光體15係以透明材料來製成，俾使從光源8射出的光朝內部穿透。導光體15係使用例如丙烯酸樹脂(PMMA)等透明材料。再者，導光體15呈平板狀。此外，導光體15也可在導光板9內使z軸方向的厚度有變化。The light guide plate 9 has a light guide 15 formed of a material that can penetrate light. The light guide 15 is made of a transparent material to allow the light emitted from the light source 8 to penetrate toward the inside. For the light guide 15, a transparent material such as acrylic resin (PMMA) is used. Furthermore, the light guide 15 has a flat plate shape. In addition, the thickness of the light guide 15 in the z-axis direction may be changed in the light guide plate 9.

如第4圖所示，導光板9係形成有在導光體15的中央部切除掉立方體而成的切除部16。切除部16的內壁形成有供光射入導光板9之內部的光入射面17。此外，光入射面17呈平面，光入射面17之中，將位於－x軸方向的光入射面設為光入射面17a，位於＋x軸方向的光入射面設為光入射面17b，位於－y軸方向的光入射面設為光入射面17c，位於＋y軸方向的光入射面設為光入射面17d。As shown in FIG. 4, the light guide plate 9 is formed with a cut-out portion 16 in which a cube is cut off at the center of the light guide body 15. The inner wall of the cutout 16 is formed with a light incident surface 17 for light to enter the light guide plate 9. In addition, the light incident surface 17 is a flat surface. Among the light incident surfaces 17, the light incident surface located in the -x-axis direction is referred to as the light incident surface 17a, and the light incident surface located in the +x-axis direction is referred to as the light incident surface 17b. The light incident surface in the y-axis direction is referred to as a light incident surface 17c, and the light incident surface in the +y-axis direction is referred to as a light incident surface 17d.

於導光板9之切除部16的內側設有四個光源8。四個光源8的發光面14係以各自朝向不同的方向的方式所構成。實施形態1中，四個光源8的發光面14係以與光入射面17a 、17b、 17c、 17d分別相對向的方式配置。四個光源8之中，當將與光入射面17a相對向的光源設為光源8a，與光入射面17b相對向的光源設為光源8b，與光入射面17c相對向的光源設為光源8c，與光入射面17d相對向的光源設為光源8d時，從光源8a、8b、8c、8d射出的光會各自射入光入射面17a 、17b、 17c、 17d。Four light sources 8 are provided inside the cut-out portion 16 of the light guide plate 9. The light-emitting surfaces 14 of the four light sources 8 are configured such that they face different directions. In the first embodiment, the light emitting surfaces 14 of the four light sources 8 are arranged so as to face the light incident surfaces 17a, 17b, 17c, and 17d, respectively. Among the four light sources 8, when the light source facing the light incident surface 17a is set as the light source 8a, the light source facing the light incident surface 17b is set as the light source 8b, and the light source facing the light incident surface 17c is set as the light source 8c. When the light source facing the light incident surface 17d is set as the light source 8d, the light emitted from the light sources 8a, 8b, 8c, and 8d enters the light incident surfaces 17a, 17b, 17c, and 17d, respectively.

此外，為了有效地將從光源8射出的光收進導光板9，光入射面17係設成與光源8的發光面14的面積相同或該面積以上。再者，光源8a、8b、8c、8d的各發光面及與各發光面分別相對向的光入射面17a 、17b、 17c、 17d的間隙(clearance)設為例如1mm以下。In addition, in order to effectively receive the light emitted from the light source 8 into the light guide plate 9, the light incident surface 17 is set to be the same as or larger than the area of the light emitting surface 14 of the light source 8. In addition, the clearances between the light-emitting surfaces of the light sources 8a, 8b, 8c, and 8d and the light-incident surfaces 17a, 17b, 17c, and 17d facing the respective light-emitting surfaces are set to, for example, 1 mm or less.

再者，光源8並非將複數個發光體12一體化而成者，也可將色純度較高的光源並排複數個而配置。此情形下，也可以將各個光源8的光射出至不同的光入射面17的方式構成，也可將複數個光源8的光射出至一個光入射面17的方式構成。再者，光源8也可使用具有兩個以上發光面14之多面發光的LED。In addition, the light source 8 is not formed by integrating a plurality of light-emitting bodies 12, and a plurality of light sources with high color purity may be arranged side by side. In this case, it may be configured to emit light from each light source 8 to different light incident surfaces 17, or it may be configured to emit light from a plurality of light sources 8 to one light incident surface 17. Furthermore, the light source 8 can also use a multi-faceted LED having two or more light-emitting surfaces 14.

導光板9的側面18係分別與相對向的光入射面17平行。導光板9的側面18之中，將與光入射面17a相對向的側面設為側面18a，與光入射面17b相對向的側面設為側面18b，與光入射面17c相對向的側面設為側面18c，與光入射面17d相對向的側面設為側面18d。The side surfaces 18 of the light guide plate 9 are respectively parallel to the opposite light incident surface 17. Among the side surfaces 18 of the light guide plate 9, the side opposite to the light incident surface 17a is referred to as side 18a, the side opposite to the light incident surface 17b is referred to as side surface 18b, and the side opposite to the light incident surface 17c is referred to as side surface. At 18c, the side surface facing the light incident surface 17d is referred to as the side surface 18d.

如第1圖所示，導光板9係於形成有導光體15之切除部16的一面設有將光從導光體15往外部射出的光出射面19。設有光出射面19之＋z軸方向側的面設為導光板9的前表面。光出射面19呈平面形狀。再者，如第4圖所示，導光體15形成有複數個會使導光體15內的光朝光出射面19偏轉的光擴散部20。光擴散部20係例如藉由機械加工將平板切削成透鏡形狀後的半球狀形狀。As shown in FIG. 1, the light guide plate 9 is provided with a light exit surface 19 that emits light from the light guide 15 to the outside on the side where the cut-out portion 16 of the light guide 15 is formed. The surface on the +z-axis direction side where the light exit surface 19 is provided is the front surface of the light guide plate 9. The light exit surface 19 has a planar shape. Furthermore, as shown in FIG. 4, the light guide 15 is formed with a plurality of light diffusion portions 20 that deflect the light in the light guide 15 toward the light exit surface 19. The light diffusion part 20 is a hemispherical shape obtained by cutting a flat plate into a lens shape by machining, for example.

此外，光擴散部20也可為例如圓錐形狀。再者，光擴散部20也可呈圓柱形狀。再者，光擴散部20只要是用以將在光出射面19的全反射條件予以瓦解，而從光擴散部20射出光的構造即可。例如可為噴砂或細微結構。而且，也可藉由白色或透明的墨水所進行的點圖案的印刷來製成。In addition, the light diffusion portion 20 may also have a conical shape, for example. Furthermore, the light diffusion part 20 may have a cylindrical shape. In addition, the light diffusing part 20 may have a structure to break the total reflection condition on the light exit surface 19 and to emit light from the light diffusing part 20. For example, it can be sandblasting or fine structure. Moreover, it can also be made by printing a dot pattern with white or transparent ink.

第一反射構件10會將光反射。此外，第一反射構件10係以具有穿透成分與反射成分的光學薄片構成。The first reflective member 10 reflects light. In addition, the first reflective member 10 is composed of an optical sheet having a transmissive component and a reflective component.

如第1圖及第4圖所示，第一反射構件10係以自導光板9的光出射面19側將導光板9的切除部16全部覆蓋的方式設置。此外，第一反射構件10的大小只要是能夠將導光板9的切除部16全部覆蓋即可，而設成比光出射面19的面積充分小者。As shown in FIGS. 1 and 4, the first reflection member 10 is installed in such a manner that the cutout portion 16 of the light guide plate 9 is completely covered from the light exit surface 19 side of the light guide plate 9. In addition, the size of the first reflection member 10 may be any size that can cover the entire cutout portion 16 of the light guide plate 9 and is set to be sufficiently smaller than the area of the light exit surface 19.

藉由第一反射構件10以將導光板9的切除部16全部覆蓋的方式設置，防止從光源8a射出的光之中，不會射入導光板9的光直接從導光板9的切除部16射出，而建構成於導光板9的內部不會發生亮點。The first reflecting member 10 is provided to cover the cut-out portion 16 of the light guide plate 9 so as to prevent the light emitted from the light source 8a from directly entering the cut-out portion 16 of the light guide plate 9 from the light emitted from the light source 8a. It is emitted, and no bright spot is formed inside the light guide plate 9.

第二反射構件11會將光反射。再者，第二反射構件11設於導光板9的側面18。第二反射構件11係以第二反射構件11a、11b、11c、11d構成。且各自安裝於導光板9的側面18a、18b、18c、18d。第二反射構件11將到達導光板9之側面18的光反射，而使其返回導光板9的內部。藉由第二反射構件11將到達導光板9之側面18的光反射而使其返回導光板9的內部，光會射入鄰接的導光板9，而防止設想範圍以外的區域發光。The second reflective member 11 reflects light. Furthermore, the second reflective member 11 is provided on the side surface 18 of the light guide plate 9. The second reflection member 11 is composed of second reflection members 11a, 11b, 11c, and 11d. And they are installed on the side surfaces 18a, 18b, 18c, and 18d of the light guide plate 9 respectively. The second reflective member 11 reflects the light reaching the side surface 18 of the light guide plate 9 and returns it to the inside of the light guide plate 9. The second reflecting member 11 reflects the light reaching the side surface 18 of the light guide plate 9 and returns it to the inside of the light guide plate 9, and the light enters the adjacent light guide plate 9 to prevent the area outside the expected range from emitting light.

此外，第一反射構件10及第二反射構件11也可採用例如由聚對苯二甲酸乙二酯等樹脂所形成的光反射薄片或使金屬蒸鍍於基板的表面而成的光反射薄片等。In addition, the first reflective member 10 and the second reflective member 11 may also be a light reflective sheet formed of resin such as polyethylene terephthalate, or a light reflective sheet formed by vapor-depositing a metal on the surface of a substrate, etc. .

再者，第一反射構件10及第二反射構件11係使用例如透射率10％以下，反射率90％以上者。第一反射構件10較佳為例如具有5％以上的透射率的素材。第二反射構件11較佳為例如具有95％以上的反射率的素材。此外，第一反射構件10及第二反射構件11也可為具有黏著性的薄片者。In addition, for the first reflection member 10 and the second reflection member 11, for example, those having a transmittance of 10% or less and a reflectance of 90% or more are used. The first reflection member 10 is preferably a material having a transmittance of 5% or more, for example. The second reflection member 11 is preferably a material having a reflectance of 95% or more, for example. In addition, the first reflective member 10 and the second reflective member 11 may also be adhesive sheets.

如第1圖及第2圖所示，反射部6係將複數個光源部7設於底面61的整個內側。為了將光從光出射面19側往反射部6的開口部63方向取出，光源部7的光出射面19的相反側的面係以抵接於反射部6之底面61的內側的方式安裝。因此，光出射面19與反射部6的開口部63相對向。As shown in FIG. 1 and FIG. 2, the reflection portion 6 has a plurality of light source portions 7 provided on the entire inner side of the bottom surface 61. In order to take out the light from the light exit surface 19 side toward the opening 63 of the reflection portion 6, the surface on the opposite side of the light exit surface 19 of the light source portion 7 is installed so as to abut against the inner side of the bottom surface 61 of the reflection portion 6. Therefore, the light exit surface 19 faces the opening 63 of the reflection part 6.

此外，於光源部7之導光板9的四個光入射面17a 、17b、 17c、 17d也可相對於四個側面18a 、18b、 18c、 18d傾斜。再者，光入射面17可為非平面，而為凸形狀或凹形狀。再者，光源部7的光出射面19可為非平面，而為凸面形狀或凹面形狀。In addition, the four light incident surfaces 17a, 17b, 17c, and 17d of the light guide plate 9 of the light source unit 7 may also be inclined with respect to the four side surfaces 18a, 18b, 18c, and 18d. Furthermore, the light incident surface 17 may be a non-planar shape, but a convex shape or a concave shape. Furthermore, the light exit surface 19 of the light source part 7 may be a non-planar shape, but a convex shape or a concave shape.

接著，針對從本實施形態1使用的光源8射出的光線的動作進行說明。此外，從光源8a 、8b、 8c、 8d各自射出的光線會進行相同的動作，因此，本實施形態針對從光源8b射出的光線L1的動作作為一例進行說明。Next, the operation of the light beam emitted from the light source 8 used in the first embodiment will be described. In addition, the light rays emitted from the light sources 8a, 8b, 8c, and 8d perform the same operation. Therefore, in this embodiment, the operation of the light rays L1 emitted from the light source 8b will be described as an example.

如第4圖所示，當從光源8b射出的光線L1到達鄰接的光入射面17b時，在光入射面17b折射而往導光板9的內部進入。As shown in FIG. 4, when the light L1 emitted from the light source 8b reaches the adjacent light incident surface 17b, it is refracted on the light incident surface 17b and enters the light guide plate 9.

此時，依照史奈爾定律(Snell's law)，在光入射面17b折射的光線L1的折射角比射入光入射面17b之光線L1的入射角還小。此外，入射角係在光線L1射入光入射面17b時，入射方向與光入射面17b之法線所形成的角度，折射角係光線L1在光入射面17b折射時，折射的方向與光入射面17b的法線所形成的角度。At this time, according to Snell's law, the refraction angle of the light L1 refracted on the light incident surface 17b is smaller than the incident angle of the light L1 incident on the light incident surface 17b. In addition, the angle of incidence refers to the angle formed by the direction of incidence and the normal to the light incident surface 17b when the light ray L1 enters the light incident surface 17b, and the refraction angle refers to the direction of refraction when the light L1 is refracted on the light incident surface 17b. The angle formed by the normal of the face 17b.

再者，依照菲涅耳方程式，當光線L1射入折射率不同之物質的界面，亦即射入光入射面17b時，一部分的光線L1會在界面反射，其他一部分的光線L1會在光入射面17b折射而穿透進入導光板9的內部。Furthermore, according to the Fresnel equation, when the light L1 enters the interface of substances with different refractive indexes, that is, enters the light incident surface 17b, a part of the light L1 will be reflected at the interface, and the other part of the light L1 will be incident on the light. The surface 17b refracts and penetrates into the light guide plate 9.

當往導光板9的內部行進的光線L1的一部分到達與光入射面17b相對向的導光板9之側面18b時，會藉由側面18b及第二反射構件11b反射。在側面18b及第二反射構件11b反射後的光線L1會往－x軸方向行進。When a part of the light L1 traveling inside the light guide plate 9 reaches the side surface 18b of the light guide plate 9 opposite to the light incident surface 17b, it will be reflected by the side surface 18b and the second reflective member 11b. The light beam L1 reflected on the side surface 18b and the second reflection member 11b travels in the -x-axis direction.

光線L1藉由在導光板9的光出射面19、光出射面19之相反側的面、側面18的全反射，及於與導光板9之光出射面19之相反側的面連接的反射部6的底面61、在設於導光板9之側面18的第二反射構件11的反射而傳播。The light L1 is totally reflected on the light exit surface 19 of the light guide plate 9, the surface opposite to the light exit surface 19, and the side surface 18, and is connected to the reflecting portion connected to the surface opposite to the light exit surface 19 of the light guide plate 9 The bottom surface 61 of 6 propagates by the reflection of the second reflection member 11 provided on the side surface 18 of the light guide plate 9.

光線L1於導光板9的內部傳播之後，會到達光出射面19。到達光出射面19的光線L1的一部分會在光擴散部20依照光擴散部20的光學特性而散射、折射、反射。After the light L1 propagates inside the light guide plate 9, it will reach the light exit surface 19. A part of the light rays L1 that have reached the light exit surface 19 is scattered, refracted, and reflected in the light diffusion portion 20 in accordance with the optical characteristics of the light diffusion portion 20.

從光擴散部20射出的光的一部分會往＋z軸方向擴散。再者，從光擴散部20射出的光的一部分會因光擴散部20而往－z軸方向散射、折射之後，藉由在反射部6的反射而往＋z軸方向擴散。如此一來，往＋z軸方向擴散後的光會到達擴散板5。Part of the light emitted from the light diffusion unit 20 diffuses in the +z axis direction. Furthermore, a part of the light emitted from the light diffusion section 20 is scattered and refracted in the −z axis direction by the light diffusion section 20, and then diffused in the +z axis direction by reflection at the reflection section 6. In this way, the light diffused in the +z axis direction will reach the diffuser 5.

到達擴散板5的光的一部分會被擴散而從面光源裝置200射出。由於從一個光源部7射出的光僅照射於擴散板5的一部分，所以藉由將該光源部7以第2圖所示的方式配置如圍棋盤的格，能夠從面光源裝置200整體使光均勻地射出。Part of the light reaching the diffusion plate 5 is diffused and emitted from the surface light source device 200. Since the light emitted from one light source unit 7 only irradiates a part of the diffuser plate 5, by arranging the light source unit 7 in a grid like a checkerboard in the manner shown in Figure 2, it is possible to make light from the surface light source device 200 as a whole Eject evenly.

到達擴散板5之光的一部分會反射而行進於反射部6的內部。行進於反射部6之內部的光會在反射部6的底面61或側面62反射而再度到達擴散板5。A part of the light reaching the diffuser plate 5 is reflected and travels inside the reflection part 6. The light traveling inside the reflection portion 6 is reflected on the bottom surface 61 or the side surface 62 of the reflection portion 6 and reaches the diffusion plate 5 again.

穿透擴散板5的光會散射。穿透擴散板5的光會成為已增加均勻性之面狀的照明光。穿透擴散板5的光會朝向液晶面板1的背面1b放射。該經放射的光穿透第二光學薄片4及第一光學薄片3而照射至液晶面板1的背面1b。The light penetrating the diffusion plate 5 is scattered. The light penetrating the diffuser plate 5 becomes planar illumination light with increased uniformity. The light penetrating the diffusion plate 5 is radiated toward the back surface 1b of the liquid crystal panel 1. The radiated light penetrates the second optical sheet 4 and the first optical sheet 3 and irradiates the back surface 1b of the liquid crystal panel 1.

此外，本實施形態中，導光板9為透明材料，也可採用包含擴散板的材料。射入導光板9的光線L1藉由擴散板被擴散而改變行進方向。再者，行進於導光板9之內部的光線L1的行進方向被變更成隨機的方向。朝隨機的方向變更行進方向的光線L1會到達導光板9的光出射面19。因此，由於到達導光板9之光出射面19的光線L1已充分地擴散，所以光擴散部20的數量可減少。In addition, in this embodiment, the light guide plate 9 is made of a transparent material, and a material including a diffuser plate may also be used. The light L1 entering the light guide plate 9 is diffused by the diffuser to change the traveling direction. Furthermore, the traveling direction of the light beam L1 traveling inside the light guide plate 9 is changed to a random direction. The light ray L1 that changes the traveling direction in a random direction reaches the light exit surface 19 of the light guide plate 9. Therefore, since the light rays L1 reaching the light exit surface 19 of the light guide plate 9 have been sufficiently diffused, the number of light diffusion portions 20 can be reduced.

依據上述的實施形態1，藉由所具備光源部7係具有以複數種發光色所構成之複數個發光體12的光源8，與調整從光源8射出的光之強度之導光板9，而能夠抑制色彩不均勻且擴大色彩還原範圍。According to the first embodiment described above, the light source unit 7 is provided with a light source 8 having a plurality of luminous bodies 12 composed of a plurality of luminous colors, and a light guide plate 9 that adjusts the intensity of light emitted from the light source 8. Suppress color unevenness and expand the range of color reproduction.

再者，藉由以射出複數種色彩的光之光源8的發光面14與導光板9的光入射面17相對向的方式配置，且於導光板9的光出射面19設置複數個光擴散部20，能夠調整從光源8往導光板9之內部射出的光的強度，進而更可獲得光的混色效果。Furthermore, the light emitting surface 14 of the light source 8 that emits multiple colors of light is arranged so that the light incident surface 17 of the light guide plate 9 is opposed to each other, and a plurality of light diffusion portions are provided on the light exit surface 19 of the light guide plate 9 20. The intensity of the light emitted from the light source 8 to the inside of the light guide plate 9 can be adjusted, and the color mixing effect of the light can be more obtained.

再者，藉由設置第一反射構件10，能夠防止未射入導光板9之內部之來自光源8的出射光直接到達反射部6的開口部63，能夠防止發生僅一部分具有高亮度分布的亮點。Furthermore, by providing the first reflecting member 10, it is possible to prevent the light emitted from the light source 8 that has not entered the light guide plate 9 from directly reaching the opening 63 of the reflecting portion 6, and it is possible to prevent the occurrence of bright spots with only a portion of high brightness distribution. .

再者，藉由將導光板9的光入射面17設成與光源8之發光面14的面積相同，或大於光源8之發光面14的面積，能夠有效地將從光源8射出的光收進導光板9。Furthermore, by setting the light incident surface 17 of the light guide plate 9 to be the same as the area of the light emitting surface 14 of the light source 8, or larger than the area of the light emitting surface 14 of the light source 8, the light emitted from the light source 8 can be effectively collected in Light guide plate 9.

再者，藉由將導光板9的光出射面19設成平面狀，能夠提升從光出射面19射出之光的強度。Furthermore, by making the light exit surface 19 of the light guide plate 9 into a plane shape, the intensity of the light exiting from the light exit surface 19 can be increased.

再者，藉由使導光板9含有擴散材，能夠在導光板9的內部將光充分地擴散，能夠減少光擴散部20的數量。Furthermore, by including the light guide plate 9 with a diffusion material, the light can be sufficiently diffused inside the light guide plate 9 and the number of light diffusion portions 20 can be reduced.

再者，藉由將從光源8射出的光的顏色設成三種顏色，能夠將設於液晶面板1之濾色器所造成的光損抑制到最小限度，並且能夠擴大色彩還原範圍。Furthermore, by setting the color of the light emitted from the light source 8 into three colors, the light loss caused by the color filter provided in the liquid crystal panel 1 can be suppressed to a minimum, and the color reproduction range can be expanded.

再者，藉由使光源8具有兩個以上的發光面14，能夠減少搭載於光源部7之光源8的個數。Furthermore, by providing the light source 8 with two or more light emitting surfaces 14, the number of light sources 8 mounted on the light source unit 7 can be reduced.

再者，藉由使反射部6的側面62以其相互的間隔從底面61側朝向開口部63側變寬的方式傾斜，能夠有效率地將在反射部6反射的光往擴散板5傳送。Furthermore, by inclining the side surfaces 62 of the reflection portion 6 such that the mutual interval becomes wider from the bottom surface 61 side toward the opening portion 63 side, the light reflected by the reflection portion 6 can be efficiently transmitted to the diffuser plate 5.

再者，藉由設置四個導光板9的光入射面17，能夠有效率地調整從光源8往導光板9之內部射出之光的強度。Furthermore, by providing the light incident surfaces 17 of the four light guide plates 9, the intensity of the light emitted from the light source 8 to the inside of the light guide plate 9 can be efficiently adjusted.

實施形態2 使用第5圖及第6圖來說明本發明之實施形態2的面光源裝置及液晶顯示裝置。此外，第5圖及第6圖中，與第1圖至第4圖相同符號係表示相同或相當部分。相對於實施形態1的面光源裝置200及液晶顯示裝置100所具備的光源部7具有四個光源8a、8b、8c、8d，及矩形狀的導光板9，本實施形態2的面光源裝置400及液晶顯示裝置300所具備的光源部30係具有兩個光源8e、8f，及將與光入射面32相對向側面33形成為V字型之導光板31。Embodiment 2 The surface light source device and the liquid crystal display device according to the second embodiment of the present invention will be explained using FIGS. 5 and 6. FIG. In addition, in FIGS. 5 and 6, the same reference numerals as those in FIGS. 1 to 4 indicate the same or corresponding parts. In contrast to the surface light source device 200 and the liquid crystal display device 100 of the first embodiment, the light source unit 7 has four light sources 8a, 8b, 8c, 8d and a rectangular light guide plate 9. The surface light source device 400 of the second embodiment And the light source unit 30 included in the liquid crystal display device 300 has two light sources 8e and 8f, and a V-shaped light guide plate 31 having a side surface 33 opposite to the light incident surface 32.

如第5圖所示，光源部30具有導光板31、光源8、第一反射構件34及第二反射構件35。如第6圖所示，導光板31係形成有在導光體38的中央部切除掉立方體而成的切除部36。切除部36的內壁形成有供光射入導光板31之內部的光入射面32。光入射面32呈平面，光入射面32之中，位於－y軸方向的光入射面設為光入射面32c，位於＋y軸方向的光入射面設為光入射面32d。As shown in FIG. 5, the light source unit 30 has a light guide plate 31, a light source 8, a first reflection member 34, and a second reflection member 35. As shown in FIG. 6, the light guide plate 31 is formed with a cut-out portion 36 formed by cutting a cube at the center of the light guide body 38. The inner wall of the cutout 36 is formed with a light incident surface 32 for light to enter the light guide plate 31. The light incident surface 32 is a flat surface. Among the light incident surfaces 32, the light incident surface located in the −y-axis direction is referred to as the light incident surface 32c, and the light incident surface located in the +y-axis direction is referred to as the light incident surface 32d.

於切除部36的內側設有兩個光源8，各個發光面14係以分別與光入射面32c、32d相對向的方式配置。兩個光源8之中，將與光入射面32c相對向的光源設為光源8e，將與光入射面32d相對向的光源設為光源8f時，從光源8e、8f射出的光會分別射入光入射面32c、32d。Two light sources 8 are provided inside the cutout portion 36, and each light-emitting surface 14 is arranged so as to face the light incident surfaces 32c and 32d, respectively. Among the two light sources 8, when the light source facing the light incident surface 32c is set as the light source 8e, and the light source facing the light incident surface 32d is set as the light source 8f, the light emitted from the light sources 8e and 8f will enter respectively Light incident surfaces 32c, 32d.

此外，為了有效地將從光源8射出的光收進導光板31，光入射面32係設成與光源8的發光面14的面積相同或該面積以上。再者，光源8e、8f的各發光面和與各發光面分別相對向的光入射面32c、 32d的間隙設為例如1mm以下。In addition, in order to efficiently receive the light emitted from the light source 8 into the light guide plate 31, the light incident surface 32 is set to be the same as or larger than the area of the light emitting surface 14 of the light source 8. In addition, the gap between the light-emitting surfaces of the light sources 8e and 8f and the light-incident surfaces 32c and 32d facing the respective light-emitting surfaces is set to, for example, 1 mm or less.

再者，光源8並非一定為經一體化的LED，也可將色純度較高的複數個光源以使各個發光面與各個光入射面32相對向的方式並排配置。再者，光源8也可使用具有兩個以上發光面14之多面發光的LED。Furthermore, the light source 8 is not necessarily an integrated LED, and a plurality of light sources with high color purity may be arranged side by side so that each light-emitting surface and each light-incident surface 32 face each other. Furthermore, the light source 8 can also use a multi-faceted LED having two or more light-emitting surfaces 14.

與光入射面32c相對向的導光板31的側面33c於x－y平面呈以與光源8e之光軸C2的交點為中心而自光源8e朝－y軸方向遠離的V字型形狀。再者，與光入射面32d相對向的導光板31的側面33d於x－y平面呈以與光源8f之光軸C3的交點為中心而自光源8f朝＋y軸方向遠離的V字型形狀。此外，第二反射構件35c係以與側面33c的形狀配合的方式設於導光板31的側面33c。再者，第二反射構件35d係以與側面33d的形狀配合的方式設於導光板31的側面33d。The side surface 33c of the light guide plate 31 facing the light incident surface 32c has a V-shape in the x-y plane centered on the intersection with the optical axis C2 of the light source 8e and away from the light source 8e in the -y axis direction. Furthermore, the side surface 33d of the light guide plate 31 facing the light incident surface 32d has a V-shape in the x-y plane centered on the intersection with the optical axis C3 of the light source 8f and away from the light source 8f in the +y axis direction. In addition, the second reflection member 35c is provided on the side surface 33c of the light guide plate 31 in a manner that matches the shape of the side surface 33c. Furthermore, the second reflective member 35d is provided on the side surface 33d of the light guide plate 31 in a manner that matches the shape of the side surface 33d.

第一反射構件34係以覆蓋導光板31之切除部36全部的方式設於導光板31的光出射面37。此外，第一反射構件34的大小只要是能夠覆蓋導光板31之切除部36全部即可，而設為比光出射面37的面積充分小者。The first reflective member 34 is provided on the light exit surface 37 of the light guide plate 31 so as to cover the entire cutout portion 36 of the light guide plate 31. In addition, the size of the first reflection member 34 only needs to be able to cover the entire cutout portion 36 of the light guide plate 31, and is set to be sufficiently smaller than the area of the light exit surface 37.

接著，針對從本實施形態2使用的光源8e、8f射出的光線的動作，使用第6圖進行說明。此外，從光源8e、 8f各自射出的光線會進行相同的動作，因此，本實施形態針對從光源8f射出的光線L2的動作作為一例進行說明。Next, the operation of the light beams emitted from the light sources 8e and 8f used in the second embodiment will be described with reference to FIG. 6. In addition, the light rays emitted from the light sources 8e and 8f perform the same operation. Therefore, in this embodiment, the operation of the light rays L2 emitted from the light source 8f will be described as an example.

當從光源8f射出的光線L2到達鄰接的光入射面32d時，在光入射面32d折射而往導光板31的內部射入。When the light beam L2 emitted from the light source 8f reaches the adjacent light incident surface 32d, it is refracted on the light incident surface 32d and enters the light guide plate 31.

於導光板31的內部行進的光線L2的一部分藉由V字型形狀的側面33d及第二反射構件35d而往－y軸方向反射。A part of the light beam L2 traveling inside the light guide plate 31 is reflected in the -y-axis direction by the V-shaped side surface 33d and the second reflection member 35d.

利用V字型形狀的側面33d及第二反射構件35d往－y軸方向反射的光線L2的一部分藉由側面33a及第二反射構件35a而從－x軸方向往＋x軸方向反射，或藉由側面33b及第二反射構件35b而從＋x軸方向往－x軸方向反射。藉此，不僅可將光朝光源8f的光軸C3的方向傳播，也可使光朝與光軸C3的方向垂直的方向傳播。A part of the light L2 reflected in the -y-axis direction by the V-shaped side surface 33d and the second reflecting member 35d is reflected from the -x-axis direction to the +x-axis direction by the side surface 33a and the second reflecting member 35a, or by The side surface 33b and the second reflection member 35b reflect from the +x-axis direction to the -x-axis direction. Thereby, not only the light can be propagated in the direction of the optical axis C3 of the light source 8f, but also the light can be propagated in the direction perpendicular to the direction of the optical axis C3.

依據上述的實施形態2，可達到與實施形態1同樣的效果。而且，藉由具備將相對向的兩個側面33c、33d設成V字型形狀而成的導光板31，僅利用從兩個光源8e、8f射出的光，就能夠調整導光板31整體之光的強度，能夠減少設於導光板31之切除部36的內部之光源8的數量。According to the second embodiment described above, the same effect as that of the first embodiment can be achieved. Moreover, by providing the light guide plate 31 formed by arranging the two opposing side surfaces 33c and 33d in a V-shape, it is possible to adjust the light of the entire light guide plate 31 by using only the light emitted from the two light sources 8e and 8f. The intensity of this can reduce the number of light sources 8 provided inside the cutout portion 36 of the light guide plate 31.

此外，上述的各實施形態中，有使用「平行」或「垂直」等表示構件間的位置關係或構件的形狀之用語的情形。該等內容係表示包含考量到在製造上的公差或安裝上的參差不齊等的範圍。因此，於申請專利範圍記載有表示元件間的位置關係或元件的形狀時，表示包含考量到在製造上的公差或安裝上的參差不齊等的範圍。In addition, in each of the above-mentioned embodiments, terms such as "parallel" or "perpendicular" indicating the positional relationship between the members or the shape of the members may be used. These contents indicate a range that includes consideration of manufacturing tolerances or installation irregularities. Therefore, when the scope of patent application describes the positional relationship between the components or the shape of the components, it means a range that includes tolerances in manufacturing or unevenness in installation.

再者，如以上所述已針對本發明的各實施形態進行了說明，然而本發明並非限定於該等各實施形態者。In addition, as described above, the embodiments of the present invention have been described, but the present invention is not limited to these embodiments.

1:液晶面板 1a:顯示面 1b:背面 2:光學薄片 3:第一光學薄片 4:第二光學薄片 5:擴散板 6:反射部 7:光源部 8、8a、8b、8c、8d、8e、8f:光源 9:導光板 10:第一反射構件 11、11a、11b、11c、11d:第二反射構件 12、12a、12b、12c :發光體 13:基體部 14:發光面 15、38:導光體 16、36:切除部 17、17a、17b、17c、17d、32、32c、32d:光入射面 18、18a、18b、18c、18d、33、33a、33b、33c、33d、62、62a、62b、62c、62d:側面 19、37:光出射面 20:光擴散部 30:光源部 31:導光板 34:第一反射構件 35、35a、35b、35c、35d:第二反射構件 61:底面 63:開口部 100、300:液晶顯示裝置 200、400:面光源裝置 C、C2、C3:光軸 L1、L2:光線1: LCD panel 1a: display surface 1b: back 2: Optical sheet 3: The first optical sheet 4: The second optical sheet 5: diffuser 6: reflection part 7: Light source department 8, 8a, 8b, 8c, 8d, 8e, 8f: light source 9: Light guide plate 10: The first reflective member 11, 11a, 11b, 11c, 11d: second reflective member 12, 12a, 12b, 12c: luminous body 13: base body 14: Luminous surface 15, 38: light guide 16, 36: Resection 17, 17a, 17b, 17c, 17d, 32, 32c, 32d: light incident surface 18, 18a, 18b, 18c, 18d, 33, 33a, 33b, 33c, 33d, 62, 62a, 62b, 62c, 62d: side 19, 37: light exit surface 20: Light diffusion part 30: Light source 31: Light guide plate 34: The first reflective member 35, 35a, 35b, 35c, 35d: second reflective member 61: Bottom 63: Opening 100, 300: Liquid crystal display device 200, 400: Surface light source device C, C2, C3: optical axis L1, L2: light

第1圖係概略地顯示本發明之實施形態1的液晶顯示裝置之構成的圖。 第2圖係概略地顯示本發明之實施形態1之面光源裝置所使用之光源部之配置的圖。 第3圖係顯示本發明之實施形態1之面光源裝置所使用之光源之構成的圖。 第4圖係顯示本發明之實施形態1之面光源裝置所使用之光源部之構成的圖。 第5圖係概略地顯示本發明之實施形態2的液晶顯示裝置之構成的構成圖。 第6圖係顯示本發明之實施形態2之面光源裝置所使用之光源部之構成的圖。Fig. 1 is a diagram schematically showing the structure of the liquid crystal display device according to the first embodiment of the present invention. Fig. 2 is a diagram schematically showing the arrangement of the light source unit used in the surface light source device according to the first embodiment of the present invention. Fig. 3 is a diagram showing the structure of a light source used in the surface light source device according to the first embodiment of the present invention. Fig. 4 is a diagram showing the structure of a light source unit used in the surface light source device according to the first embodiment of the present invention. Fig. 5 is a configuration diagram schematically showing the configuration of the liquid crystal display device according to the second embodiment of the present invention. Fig. 6 is a diagram showing the structure of a light source unit used in the surface light source device according to the second embodiment of the present invention.

1:液晶面板 1: LCD panel

1a:顯示面 1a: display surface

1b:背面 1b: back

2:光學薄片 2: Optical sheet

3:第一光學薄片 3: The first optical sheet

4:第二光學薄片 4: The second optical sheet

5:擴散板 5: diffuser

6:反射部 6: reflection part

7:光源部 7: Light source department

8:光源 8: light source

9:導光板 9: Light guide plate

10:第一反射構件 10: The first reflective member

11:第二反射構件 11: The second reflective member

17:光入射面 17: Light incident surface

18、62:側面 18, 62: side

19:光出射面 19: Light exit surface

61:底面 61: Bottom

63:開口部 63: Opening

100:液晶顯示裝置 100: Liquid crystal display device

200:面光源裝置 200: Surface light source device

Claims (11)

一種面光源裝置，係具備：光源部，該光源部係具有：導光板，該導光板係具有：由光會穿透的材料所形成的導光體，切除前述導光體之一部分所形成的切除部，以與光出射面正交之方式形成在前述切除部的內壁且供光射入前述導光體之內部的光入射面，形成在前述導光體的一面且將光從前述導光體朝外射出的前述光出射面，以及形成在前述導光體的前述光出射面且使前述導光體內的光朝前述光出射面偏轉的光擴散部，光源，該光源係以會發出不同顏色之光的複數個發光體構成，且設於前述切除部的內側，且配置成使射出從前述發光體所發出的光的發光面與前述光入射面相對向，第一反射構件，該第一反射構件係將光反射，且以從前述光出射面側將前述切除部全部覆蓋的方式設置，第二反射構件，該第二反射構件係將光反射，且設於前述導光板的側面；反射部，係於一面形成有開口部且其內面成為反射面之中空的箱型形狀，且以使前述光源部之前述光出射面之相反側的面與箱型形狀之底面的內側抵接的方式，於前述底面的內側整體設置複數個前述光源部；以及擴散板，係使穿透的光散射，且以覆蓋前述反射部之前述開口部的方式配置。 A surface light source device is provided with: a light source part having: a light guide plate having: a light guide body formed of a material through which light can penetrate, and a light guide body formed by cutting a part of the light guide body The cut-out portion is formed on the inner wall of the cut-out portion orthogonal to the light-emitting surface and the light incident surface that supplies light into the inside of the light guide is formed on one surface of the light guide and guides the light from the light guide. The light exit surface from which the light body emits outward, and the light diffuser formed on the light exit surface of the light guide body and deflects the light in the light guide body toward the light exit surface, a light source, the light source is capable of emitting light A plurality of luminous bodies of light of different colors are formed, and are arranged inside the cut-out portion, and are arranged so that the light-emitting surface that emits the light emitted from the luminous body faces the light incident surface, the first reflecting member, the The first reflective member reflects light and is provided so as to cover all the cutouts from the light exit surface side, and the second reflective member reflects light and is provided on the side surface of the light guide plate Reflecting part is a box-shaped shape with an opening formed on one surface and its inner surface becomes a hollow reflecting surface, and the surface opposite to the light-emitting surface of the light source part and the inner side of the bottom surface of the box-shaped shape In the connection method, a plurality of the light source parts are provided on the entire inner side of the bottom surface; and a diffuser plate is arranged to diffuse the transmitted light and to cover the opening of the reflection part. 如申請專利範圍第1項所述之面光源裝置，其中，前述導光板設有與前述光源之前述發光面的面積相同或其面積以上的前述光入射面。 According to the surface light source device described in claim 1, wherein the light guide plate is provided with the light incident surface having an area equal to or greater than that of the light emitting surface of the light source. 如申請專利範圍第1項所述之面光源裝置，其中，前述導光板設有平面狀的前述光出射面。 According to the surface light source device described in claim 1, wherein the light guide plate is provided with a flat light exit surface. 如申請專利範圍第1項所述之面光源裝置，其中，前述導光板含有擴散材。 The surface light source device described in claim 1, wherein the light guide plate contains a diffuser. 如申請專利範圍第1項所述之面光源裝置，其中，從前述光源射出的光的顏色為三色。 The surface light source device described in claim 1, wherein the color of the light emitted from the light source is three colors. 如申請專利範圍第1項所述之面光源裝置，其中，前述光源具有二個以上的前述發光面。 The surface light source device according to the first item of the scope of patent application, wherein the light source has two or more light emitting surfaces. 如申請專利範圍第1項所述之面光源裝置，其中，前述反射部之設於前述底面之周圍的側面係以相互的間隔從前述底面側朝向前述開口部側變寬的方式傾斜。 The surface light source device described in claim 1, wherein the side surfaces of the reflecting portion provided around the bottom surface are inclined such that the mutual interval becomes wider from the bottom surface side toward the opening portion side. 如申請專利範圍第1項所述之面光源裝置，其中，前述導光板設有四個前述光入射面，前述光源係配置於使前述發光面與前述導光板之各個前述光入射面相對向的位置。 The surface light source device described in claim 1, wherein the light guide plate is provided with four light incident surfaces, and the light source is arranged so that the light emitting surface and each light incident surface of the light guide plate face each other position. 如申請專利範圍第1項所述之面光源裝置，其中，前述導光板係設有兩個前述光入射面，且以前述光入射面分別相對向的方式配置，前述光源係配置於使前述發光面與前述導光板之各個前述光入射面相對向的位置。 According to the surface light source device described in claim 1, wherein the light guide plate is provided with two light incident surfaces, and the light incident surfaces are arranged in such a way that the light incident surfaces face each other, and the light source is arranged to cause the light to be emitted. The position where the surface faces each of the light incident surfaces of the light guide plate. 如申請專利範圍第9項所述之面光源裝置，其中，前述導光板之與前述光入射面相對向之前述導光板的側面係呈以與前述光源的光軸的交點為中心而從前述光源遠離的V字型形狀。 The surface light source device according to claim 9, wherein the side surface of the light guide plate facing the light incident surface of the light guide plate is centered on the intersection of the optical axis of the light source and the light source V-shaped shape far away. 一種液晶顯示裝置，係具備：申請專利範圍第1項至第10項中任一項所述之面光源裝置；液晶面板，係將光轉換成影像光；以及光學薄片，係使從前述面光源裝置所射出的光朝向前述液晶面板之顯示面的法線方向，或使從前述面光源裝置所射出的光擴散。 A liquid crystal display device is provided with: the surface light source device described in any one of items 1 to 10 in the scope of patent application; a liquid crystal panel that converts light into image light; and an optical sheet that uses the surface light source The light emitted by the device is directed toward the normal direction of the display surface of the liquid crystal panel, or the light emitted from the surface light source device is diffused.
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