TWI301918B - Litht diffusing members assembly, surface light source device and image display device - Google Patents

Litht diffusing members assembly, surface light source device and image display device Download PDF

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Publication number
TWI301918B
TWI301918B TW091110760A TW91110760A TWI301918B TW I301918 B TWI301918 B TW I301918B TW 091110760 A TW091110760 A TW 091110760A TW 91110760 A TW91110760 A TW 91110760A TW I301918 B TWI301918 B TW I301918B
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Taiwan
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layer
light
diffusing element
light source
diffusion
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TW091110760A
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Chinese (zh)
Inventor
Kazumasa Ohsumi
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Enplas Corp
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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
    • G02F1/133604—Direct backlight with lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Description

1301918 五、發明說明（3) 散元件組裝體至少具有第1層、第2層及第3層；上述第 至少由1個擴散元件塊構成；上述第2層由重疊於上述第工曰 層之至少1個擴散元件塊構成；上述第3層由^疊於^述 2層之至少1個擴散元件塊構成。且，於上述第1層與上述 第2層重疊面的至少一側形成多數之第1凹部；於上述第^ 層與上述第3層重疊面的至少一方形成多數之第'2凹部。於 此，上述第2凹部位於上述第1凹部之間。 、 或在相同的3層構成之光擴散元件組裝體中，在相 於上述第1層之上述第2層的面上，形成多數之剖面略圓 形的第1凹部；在相對於上述第2層之上述第丨層的面 對應於上述第1凹部的位置形成剖面略半圓形二第2凹^ ’. 在相對於上述第2層之上述第3層的面上，以位於上_ ’ 凹部間之方式形成剖面略半圓形的第3凹部.在相 述第3層之上述第2層的面上，對應於上述第’3凹的位^ 形成剖面略半圓形的第4凹部。 1 這些3層構成之光擴散元件組裝體中， 層的擴散元件塊與構成上述第2層的擴散元件塊 的大小’並使上述第1層的各擴散元件塊之對接位置鱼Z 述第2層的各擴散元件塊之對接位置不番 一上 成上述第2層的擴散元件塊與構成上述第3層的擴散元吏構 作成不同的大小，並使上述第2層的各擴散元件 牛束 位置與上述第3層的各擴散元件塊之對接位置不重疊為接 佳。 上述各型態的光擴散元件組裝體中，上述光源亦可為1301918 V. INSTRUCTION OF THE INVENTION (3) The discrete element assembly has at least a first layer, a second layer, and a third layer; the first layer is composed of at least one diffusion element block; and the second layer is overlapped with the first work layer The at least one diffusion element block is configured; and the third layer is composed of at least one diffusion element block stacked on the two layers. Further, a plurality of first recesses are formed on at least one of the first layer and the second layer overlapping surface, and a plurality of second recesses are formed in at least one of the first layer and the third layer overlapping surface. Thus, the second recess is located between the first recesses. Or in a light diffusing element assembly having the same three-layer structure, a plurality of first recesses having a substantially circular cross section are formed on a surface of the second layer of the first layer; The surface of the second layer of the layer corresponds to the position of the first recess, and the cross section is slightly semicircular and the second recess is formed. The surface of the third layer with respect to the second layer is located at the top _ ' A third recess having a substantially semi-circular cross section is formed between the recesses. A fourth recess having a slightly semi-circular cross section is formed on the surface of the second layer of the third layer to correspond to the third recess. . In the three-layer light diffusing element assembly, the size of the diffusing element block of the layer and the size of the diffusing element block constituting the second layer are the same as those of the diffusing element block of the first layer. The diffusion position of each of the diffusion element blocks of the layer is different from that of the diffusion element block of the second layer, and the diffusion element structure constituting the third layer is different in size, and the diffusion elements of the second layer are bundled. The position is not overlapped with the position where the diffusion element blocks of the third layer are not overlapped. In the light diffusing element assembly of each of the above types, the light source may be

1301918 五、發明說明（4) 棒狀的螢光棒。此時，上述凹部以沿著上述螢光燈的長度 方向形成線狀為佳。 此外，亦可在上述所有或一部份的凹部，填入與上述 光擴散元件塊不同折射率的光透過性物質。 繼之，本發明係適用於面光源裝置及影像顯示裝置。 根據本發明之面光源裝置具備有：如上述改良之光擴散元 件組裝體；與位於上述光擴散元件組裝體的内面側並將來 自上述光源的光反射至上述光擴散元件組裝體的内面側之 反射構件。 於此，以於上述光擴散元件組裝體的出射面側至少配 置一片擴散板為佳。 此外，藉由組合如此構成之面光源裝置；與由該面光 源裝置輸出的照明光供給的影像顯示部，可構成本發明之 影像顯示部。 如上所述，關於各種型態的光擴散元件組裝體及使用 這些的面光源裝置與影像顯示裝置的特徵在以下的實施型 態中有更詳細的說明。 【發明之實施型態】 以下，參照圖面詳細說明本發明之實施型態。 (第1實施型態） 第1圖係關於本發明第1實施型態的面光源裝置之外觀 斜視圖。第2圖係第1圖所示之面光源裝置的分解斜視圖。 第4圖係沿著第1圖的A-A線之剖視圖。 (面光源裝置及影像顯示裝置的概略構成）1301918 V. INSTRUCTIONS (4) Rod-shaped fluorescent rods. In this case, it is preferable that the concave portion is formed in a line shape along the longitudinal direction of the fluorescent lamp. Further, a light-transmitting substance having a refractive index different from that of the light-diffusing element block may be filled in all or a part of the recesses. Furthermore, the present invention is applicable to a surface light source device and an image display device. The surface light source device according to the present invention includes the improved light diffusing element assembly, and the light from the light source is reflected on the inner surface side of the light diffusing element assembly, and is reflected on the inner surface side of the light diffusing element assembly. Reflective member. Here, it is preferable that at least one diffusion plate is disposed on the exit surface side of the light diffusing element assembly. Further, the image display unit of the present invention can be constructed by combining the surface light source device configured as described above and the image display portion supplied with the illumination light output from the surface light source device. As described above, the light diffusing element assembly of various types and the features of the surface light source device and the image display device using the same are described in more detail in the following embodiments. [Embodiment of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (First embodiment) Fig. 1 is a perspective view showing the appearance of a surface light source device according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view showing the surface light source device shown in Fig. 1. Fig. 4 is a cross-sectional view taken along line A-A of Fig. 1. (Schematic configuration of surface light source device and video display device)

313686.ptd 第9頁 1301918313686.ptd Page 9 1301918

五、發明說明（5) 如這些圖所示，本發明實施型態的面光源裝置1具 有：光擴散元件組裝體2 ;配置於背面侧（第1圖、^ 及第4圖的下面側）之複數棒狀螢光燈（一次光源）3· 置於這些螢光燈3下方側的反射構件4 ;與配置於光擴j配 件組裝體2的出射侧（上方側）之擴散板5。 、政元 螢光燈3以預定間隔配置複數條。反射構件4係將來 螢光燈3的光反射至光擴散元件組裝體2的内面側。光擴f 板5係將由光擴散元件組裝體2出射的光加以擴散。如第f 圖所示，藉由在擴散板5上重疊配置影像顯示部（在此為 液晶顯示面板）6，可構成以面光源裝置1面狀照明的影 顯示裝置7。 如 (光擴散元件組裝體） 光擴散元件組裝體2具有3層構造，係由第1層8至第3 層10。如第3圖所示，第1層8組合6個四角形板狀的擴散元 件塊8 a至8 f，形成與液晶顯示面板6的平面形狀相對應尺 寸之四角板狀。擴散元件塊8 a至8 f於縱向並列2個且橫向 並列3個（2行3列，合計有6個）。各擴散元件塊8 a至8 f彼 此緊密接合。 繼之，如第3圖所示，第2層9組合15個四角形板狀的 擴散元件塊9 a至9 〇，形成與液晶顯示面板6的平面形狀相 對應尺寸之四角板狀。擴散元件塊9 a至9 〇於縱向並列3個 且橫向並列5個（3行5列，合計有1 5個）。各擴散元件塊 9a至9〇彼此緊密接合。 該第2層9之各擴散元件塊9a至9〇的對接位置（相鄰之5. Description of the Invention (5) As shown in these figures, the surface light source device 1 according to the embodiment of the present invention includes the light diffusing element assembly 2 and is disposed on the back side (the lower side of the first, second, and fourth figures). The plurality of rod-shaped fluorescent lamps (primary light sources) 3 are the reflection members 4 placed on the lower side of the fluorescent lamps 3, and the diffusion plates 5 disposed on the emission side (upper side) of the optical expansion j-assembly assembly 2. The illuminator 3 is configured with a plurality of bars at predetermined intervals. The reflecting member 4 reflects the light of the fluorescent lamp 3 to the inner surface side of the light diffusing element assembly 2. The light-spreading plate 5 diffuses the light emitted from the light-diffusing element assembly 2. As shown in Fig. f, the image display unit (here, the liquid crystal display panel) 6 is placed on the diffusion plate 5 so as to be superimposed, whereby the image display device 7 that illuminates the surface light source device 1 in a planar manner can be formed. (Light diffusing element assembly) The light diffusing element assembly 2 has a three-layer structure and is composed of the first layer 8 to the third layer 10. As shown in Fig. 3, the first layer 8 is formed by combining six quadrangular plate-shaped diffusion element blocks 8a to 8f to form a square plate shape corresponding to the planar shape of the liquid crystal display panel 6. The diffusion element blocks 8a to 8f are juxtaposed in two in the longitudinal direction and three in the lateral direction (two rows and three columns, totaling six). The respective diffusion element blocks 8a to 8f are tightly bonded to each other. Then, as shown in Fig. 3, the second layer 9 is formed by combining 15 quadrangular plate-shaped diffusion element blocks 9a to 9A to form a square plate shape having a size corresponding to the planar shape of the liquid crystal display panel 6. The diffusion element blocks 9a to 9 are arranged side by side in the longitudinal direction and 3 in the lateral direction (3 rows and 5 columns, a total of 15). Each of the diffusion element blocks 9a to 9 is tightly joined to each other. The docking position of each of the diffusion element blocks 9a to 9〇 of the second layer 9 (adjacent

1301918 五、發明說明（9) 過於顯著。 (本實施型態的作用·效果） 本實施型態中光的動作概要如下： 螢光燈3的光直接或透過反射構件4反射之後，由光擴 散元件組裝體2之第1層8的擴散元件塊8a至8f下面入射。 該入射光在傳遞於擴散元件塊8a至8f的過程中，受到第1 層8與第2層9重疊面上形成之凹部11、12 (空孔部13)的 界面所產生之折射作用。 空孔部1 3的剖視形狀為略圓形，而且空孔部丨3的内部 存有空氣。存在於空孔部13的空氣與第1及第2層8、9的擴 散元件塊8a至9〇之光的折射率之差異性很大。因此，傳遞 於擴散元件塊8a至8f内的光，藉由折射行進方向多樣化且 大致呈均一擴散。尚且，有一部份的光不會藉由空孔部13 擴散。 當這些擴散的光及沒有擴散的光傳遞於第2層9的擴散 元件塊9a至9〇内時，受到第2層9與第3層1〇重疊面上^ 之凹部14、15 (空孔部16)的界面所產生之折射作用^空 孔部1 6藉由與上述空孔部丨3相同的折射作用， = 散。據此，無法在空孔部丨3擴散的光，大二二= 16擴散。 1刀㈢在空孔部 散 面 第1 〇圖係概念表示受到空孔部1 3、 的光之代表的光路圖。 1 6之折射作用而擴 如此’來自光擴散元件組裝體2的出射 的法線方向（第4圖的B方向）可均勻化， 光不僅在出射 而且相對於法1301918 V. Invention description (9) is too significant. (Operation and Effect of the Present Embodiment) The outline of the operation of the light in the present embodiment is as follows: After the light of the fluorescent lamp 3 is directly reflected by the reflection member 4, the diffusion of the first layer 8 of the light diffusing element assembly 2 is performed. The element blocks 8a to 8f are incident below. This incident light is refracted by the interface between the concave portions 11, 12 (the void portions 13) formed on the overlapping surface of the first layer 8 and the second layer 9 during the transmission to the diffusing element blocks 8a to 8f. The cross-sectional shape of the hollow portion 13 is slightly circular, and air is present inside the hollow portion 丨3. The difference between the refractive index of the air existing in the hollow portion 13 and the diffusing element blocks 8a to 9b of the first and second layers 8 and 9 is large. Therefore, the light transmitted through the diffusion element blocks 8a to 8f is diversified by the direction of refraction travel and is substantially uniformly diffused. Still, a portion of the light does not diffuse through the aperture portion 13. When the diffused light and the non-diffused light are transmitted into the diffusion element blocks 9a to 9b of the second layer 9, the concave portions 14, 15 which are on the overlapping surface of the second layer 9 and the third layer 1 are formed. The refraction effect produced by the interface of the portion 16) is the same as that of the above-described void portion ,3, and is scattered. According to this, the light that cannot be diffused in the hollow portion 丨3 is diffused by the large two=16. One knives (3) in the hole portion The first 〇 diagram concept shows an optical path diagram represented by the light of the hole portion 13 . The refraction of 1 6 is expanded. Thus, the normal direction of the emission from the light diffusing element assembly 2 (the B direction in Fig. 4) can be uniformized, and the light is not only emitted but also relative to the method.

1301918 五、發明說明（10) 線方向之斜方向（第4圖的c、D方向）亦可均勻化。此係 意味來自光擴散元件組裝體2的出射光即使由正面以外傾 f的方向觀察亦不易出現亮度不均的問題，如此得以獲致 兩品質的照明。因此，來自光擴散元件組裝體2的出射光 通過擴散板5而照明液晶顯示面板β。 ^ 尚且’需留意最好各層相鄰的擴散元件塊係為非常緊 岔地連結。若連結不夠緊密，沿著該境界會產生光學的界 面並出現線條狀亮線等異常發光。惟即使產生此異常發光 在本實施型態中亦不顯著。 例如：即使在第1層8的擴散元件塊8a至8f的接合部產 生異常發光’亦會因第2層9、第3層10及擴散板5的擴散作 用而淡化。此外，即使第2層9之擴散元件塊93至9〇的接合 部產生異常發光，亦會在第3層10及擴散板5擴散。又，即 使在第3層1 0的擴散元件塊丨0 ^、1 〇 b之間的接合部產生異 常發光，亦會於擴散板5擴散。 此外’本實施型態中面光源裝置1之特徵係：不需形 成S知例之遮光膜（遮光圖案）。不使用遮光膜，可避免 光的吸收損失並增加射出光的亮度。 本實施型態的面光源裝置1之尺寸的變更極為容易。 因為可將光擴散元件組裝體2多層化為第1至第3層8至10, 並將各層8至10分割成複數的擴散元件塊8a至8f、9a至 9〇、 10a至10b。藉由增減小擴散構件8a…10b的組合數 量，得以容易地將光擴散元件組裝體2的出射光面積加以 放大或縮小。1301918 V. DESCRIPTION OF THE INVENTION (10) The oblique direction of the line direction (c and D directions in Fig. 4) can also be uniformized. This means that the light emitted from the light diffusing element assembly 2 is less likely to be uneven in brightness even when viewed from the direction of the front side, so that two-quality illumination can be obtained. Therefore, the light emitted from the light diffusing element assembly 2 passes through the diffusing plate 5 to illuminate the liquid crystal display panel β. ^ Still, it is important to note that the best diffusion element blocks adjacent to each other are very tightly connected. If the connection is not tight enough, an optical interface will appear along the boundary and an abnormal light such as a bright line will appear. However, even if this abnormal luminescence is generated, it is not remarkable in this embodiment. For example, even if the abnormal light emission is generated at the joint portion of the diffusion element blocks 8a to 8f of the first layer 8, the diffusion of the second layer 9, the third layer 10, and the diffusion plate 5 is diminished. Further, even if the joint portion of the diffusion element blocks 93 to 9A of the second layer 9 is abnormally emitted, it spreads on the third layer 10 and the diffusion plate 5. Further, even if the junction between the diffusion element blocks 丨0 ^ and 1 〇 b of the third layer 10 is abnormally emitted, the diffusion plate 5 is diffused. Further, the surface light source device 1 of the present embodiment is characterized in that it is not necessary to form a light-shielding film (light-shielding pattern) of the example. Without the use of a light-shielding film, absorption loss of light can be avoided and the brightness of the emitted light can be increased. The change in the size of the surface light source device 1 of the present embodiment is extremely easy. Since the light diffusing element assembly 2 can be multilayered into the first to third layers 8 to 10, the respective layers 8 to 10 are divided into a plurality of diffusing element blocks 8a to 8f, 9a to 9A, 10a to 10b. By increasing or decreasing the number of combinations of the diffusion members 8a to 10b, the area of the light emitted from the light diffusing element assembly 2 can be easily enlarged or reduced.

313686.ptd 第15頁 1301918 五、發明說明（13) 而構成者。 第1例示中，如第8(a)圖所示，於第1層8與第2層9 的接合面上相對形成凹部2 2、2 2。此外，第2例示中，如 第8圖（b)所示，在相對於第1層8之第2層9的面上多數形 成凹部2 2。這些第1至第3例中的凹部2 2係以圓滑曲面連續 形成，且相鄰的凹部2 2、2 2間亦以圓滑曲面相連。形成凹 部2 2的面之剖面形狀係為略波形。 第4例示中，如第8(d)圖所示，於第1層8與第2層9 的接合面分別多數形成剖面略半圓形的凹部2 2、2 2。而且 第2層9的凹部22位於第1層8的凹部22、22之間。 不論是哪個例示，來自螢光燈3的光皆可藉由各凹部 22進行擴散，所以來自光擴散元件組裝體2的出射面之光 得以均勻出射。結果，與第1、第2實施型態相同，可有效 防止由觀察方向所生之出射光亮度的不均。因為本實施型 態之光擴散元件組裝體2的層數較少，故有利於達成面光 裝置1及具備相同裝置1之影像顯示裝置7的薄型化·輕量 化。此外，其他作用效果係與第1實施型態相同，所以省 略重複之說明。 尚且，上述第1至第3的各實施型態中，如第9圖所 示，以將凹部1 1至1 2、1 4至1 5、2 0至2 2沿著螢光燈的長度 方向形成線狀為佳。 [其他變形例] 上述實施型態係為例示而容許如下之變形。 (i )上述各實施型態中例示凹部1 1至1 2、1 4至1 5、2 0313686.ptd Page 15 1301918 V. The invention (13) constitutes the constructor. In the first example, as shown in Fig. 8(a), the concave portions 2, 2 2 are formed to face each other on the joint surface of the first layer 8 and the second layer 9. Further, in the second example, as shown in Fig. 8(b), a plurality of concave portions 2 2 are formed on the surface of the second layer 9 of the first layer 8. The concave portions 2 2 in the first to third examples are continuously formed in a smooth curved surface, and the adjacent concave portions 2 2, 2 2 are also connected by a smooth curved surface. The cross-sectional shape of the face on which the concave portion 22 is formed is a slight waveform. In the fourth example, as shown in Fig. 8(d), in the joint faces of the first layer 8 and the second layer 9, a plurality of concave portions 2, 2 2 having a substantially semicircular cross section are formed. Further, the recess 22 of the second layer 9 is located between the recesses 22, 22 of the first layer 8. In either case, the light from the fluorescent lamp 3 can be diffused by the respective concave portions 22, so that the light from the exit surface of the light diffusing element assembly 2 is uniformly emitted. As a result, as in the first and second embodiments, the unevenness of the brightness of the emitted light generated by the observation direction can be effectively prevented. Since the number of layers of the light diffusing element assembly 2 of the present embodiment is small, it is advantageous to achieve a reduction in thickness and weight of the surface light device 1 and the image display device 7 including the same device 1. In addition, the other operational effects are the same as those of the first embodiment, and therefore the description thereof will be omitted. Further, in each of the first to third embodiments described above, as shown in FIG. 9, the recesses 1 1 to 12 2, 1 4 to 15 and 20 to 2 2 are along the longitudinal direction of the fluorescent lamp. It is better to form a line. [Other Modifications] The above embodiment is exemplified and allows the following modifications. (i) The recesses 1 1 to 1 2, 1 4 to 1 5, 2 0 are exemplified in the above embodiments.

313686.ptd 第18頁 1301918 -----—----- 五、發明說明（14) 至2 2内存有空氣的狀態。然而，本發明並不限定於此。例 如·亦可在凹部11至12、14至15、2〇至22内，填入具有與 擴散元件塊8a…1 Ob的折射率不同的光透過性物質。 次外’填入於凹部11至12、14至15、2〇至22的光透過 性物貝亦可為在與擴散元件塊8a〜1 〇b相同種類或不同種 類的^料上混合分散具有不同折射率的微小粒子。 尚且’光透過性物質亦可填入所有的凹部丨丨至丨2、i 4 呈15 至22，或僅填入一部分的凹部。 (1 Y)上述的各實施型態中例示以略半圓形或連續圓 滑曲線形成的剖面形狀的凹部丨丨至丨2、丨4至丨5、2 〇至2 2。 然而’此僅為例示。一般亦可以是具有可將光擴散之剖面 形狀的凹部、剖面略三角形的凹部或其他剖面形狀的凹 部。 (1 )上述的各實施型態中，光擴散元件組裝體2係 以3層或2層所構成。然而，亦可將光擴散元件組裝體2增 加為4層以^之多層構造體。 (1V/第9圖所示之凹部11至12、14至15、20至22的線 狀排列係為例示。其他的排列型態，例如：亦可將凹部形 成點狀。 ,(V ^上述的各實施型態中凹部（空孔部）的形成間距 係為固疋°然而’隨著與配置於内面侧的光源相對的位置 亦玎改變形成間距（粗密） 【發明之效果】 如此 本發明具有多層構造，而且藉由於各層接合的313686.ptd Page 18 1301918 ----------- V. Description of the invention (14) to 2 2 There is air in the memory. However, the invention is not limited thereto. For example, a light-transmitting substance having a refractive index different from that of the diffusing element blocks 8a...1 Ob may be filled in the recesses 11 to 12, 14 to 15, and 2 to 22 . The light-transmissive material filled in the concave portions 11 to 12, 14 to 15, and 2 to 22 may be mixed and dispersed on the same type or different types of materials as the diffusion element blocks 8a to 1b. Tiny particles of different refractive indices. Still, the light-transmitting substance may be filled in all the recesses 丨2, i4 in the form of 15 to 22, or only a part of the recesses. (1 Y) In each of the above embodiments, the cross-sectional recesses 丨丨2, 丨4 to 丨5, 2 〇 to 2 2 formed by a slightly semicircular or continuous round curve are exemplified. However, this is merely an illustration. In general, it may be a concave portion having a cross-sectional shape in which light can be diffused, a concave portion having a slightly triangular cross section, or a concave portion having another cross-sectional shape. (1) In each of the above embodiments, the light diffusing element assembly 2 is composed of three or two layers. However, the light diffusing element assembly 2 can also be added to a multilayer structure of four layers. (The linear arrangement of the recesses 11 to 12, 14 to 15, and 20 to 22 shown in Fig. 9 is exemplified. For other alignment types, for example, the concave portion may be formed in a dot shape. (V ^ above In each embodiment, the formation pitch of the concave portion (the void portion) is a solid angle. However, the position is changed to be coarse (closed) with respect to the position of the light source disposed on the inner surface side. [Effect of the Invention] Thus, the present invention Has a multi-layer construction and is bonded by layers

3l3686.ptd 第19頁 1301918 五、發明說明（15) 面之至少一側形成具有光擴散機能的凹部之光擴散元件組 裝體，可使光勻均擴散輸出。因此，可有效防止觀察方向 所產生之亮度不均。不僅是出射面的可獲致均勻化，而且 相對於出射面的法線方向朝斜方向的出射光的亮度分布亦 可均勻化。結果，得以獲致高品質的照明。 此外，因為本發明中形成於光擴散元件組裝體各層的 接合面之至少一側的凹部將光加以擴散，所以不需將習知 例的遮光圖案形成於擴散構件上。結果，形成遮光圖案時 所產生之光的吸收損失不會發生。因此，得以高效率地提 昇出射光的亮度。 而且，將具備本發明之光擴散元件組裝體的面光源裝 置使用在影像顯示部的照明，可形成均勻且有效率的照明 並獲致明亮易觀察的顯示影像。3l3686.ptd Page 19 1301918 V. INSTRUCTION DESCRIPTION (15) A light diffusing element assembly having a concave portion having a light diffusing function is formed on at least one side of the surface, and the light can be uniformly diffused and output. Therefore, it is possible to effectively prevent uneven brightness caused by the observation direction. Not only is the exit surface uniform, but the luminance distribution of the outgoing light in the oblique direction with respect to the normal direction of the exit surface can be uniformized. As a result, high quality lighting is achieved. Further, in the present invention, the concave portion formed on at least one of the joint faces of the respective layers of the light-diffusing element assembly diffuses light, so that it is not necessary to form the light-shielding pattern of the conventional example on the diffusion member. As a result, the absorption loss of light generated when the light-shielding pattern is formed does not occur. Therefore, the brightness of the emitted light can be efficiently increased. Further, the surface light source device including the light diffusing element assembly of the present invention is used for illumination of the image display portion, thereby forming uniform and efficient illumination and obtaining a display image which is bright and easy to observe.

313686.ptd 第20頁 1301918 圖式簡單說明 【圖面之簡單說明】 第1圖係本發明第1實施型態之面光源裝置的外觀斜視 圖。 第2圖係第1圖所示之面光源裝置的分解斜視圖。 第3圖係將本發明第1實施型態中採用的光擴散元件組 裝體加以分解之平面圖。 第4圖係沿著第1圖中的A-A線之剖視圖。 第5圖係第4圖所示之光擴散元件組裝體的部分放大 圖。 第6圖係將第5圖所示之光擴散元件組裝體加以分解之 部分放大圖。 第7 ( a )至（d )圖係以部份放大圖表示第2實施型態 中採用的光擴散元件組裝體的4個例子（a )至（d )。 第8 ( a )至（d )圖係將第3實施型態中採用的光擴散 元件組裝體之部份放大圖。 第9圖係表示形成於光擴散元件組裝體的各層之凹部 形狀的斜視圖。 第1 0圖係概念地表示於空孔部與界面受到折射作用而 擴散之光的代表光路圖。 第1 1圖係放大習知面光源裝置的一部份之側面圖。 【元件符號說明】 1 面光源裝置 2 光擴散元件組裝體 3 螢光燈（一次光源） 4 反射構件 5 擴散板313686.ptd page 20 1301918 BRIEF DESCRIPTION OF THE DRAWINGS [Brief Description of the Drawing] Fig. 1 is a perspective view showing the appearance of a surface light source device according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view showing the surface light source device shown in Fig. 1. Fig. 3 is a plan view showing the light diffusing element assembly used in the first embodiment of the present invention. Fig. 4 is a cross-sectional view taken along line A-A in Fig. 1. Fig. 5 is a partially enlarged view of the light diffusing element assembly shown in Fig. 4. Fig. 6 is a partially enlarged view showing the light diffusing element assembly shown in Fig. 5 in an exploded manner. The seventh (a) to (d) drawings show four examples (a) to (d) of the light diffusing element assembly used in the second embodiment in a partially enlarged view. The eighth (a) to (d) drawings are partial enlarged views of the light diffusing element assembly used in the third embodiment. Fig. 9 is a perspective view showing the shape of a concave portion formed in each layer of the light diffusing element assembly. Fig. 10 conceptually shows a representative optical path diagram of light diffused by the refracting action at the hole portion and the interface. Fig. 1 is a side elevational view showing a part of a conventional surface light source device. [Description of component symbols] 1 Surface light source device 2 Light diffusing element assembly 3 Fluorescent lamp (primary light source) 4 Reflecting member 5 Diffuser

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313686.ptd 第22頁313686.ptd Page 22

Claims (1)

1¾¾ 案號 91110760 竹年芯___月—ry- 修正 1¾¾ 案號 91110760 竹年芯___月—ry- 修正 W年《月/?曰修(更)正本 申請專利範圍 1. 一種光擴散元件組k體，係—從内面W破乎整面入射來 自配置於内面側之光源的光並加以擴散而出射，其特 徵在具備： 至少具有第1層及第2層； 上述第1層至少由1個擴散元件塊構成； 上述第2層由重疊於上述第1層之至少1個擴散元件 塊所構成；且 於上述第1層與上述第2層重疊面之至少一方形成 多數之剖面略半圓形的凹部。 2. 一種光擴散元件組裝體，係從内面的幾乎整面入射來 自配置於内面側之光源的光並加以擴散而出射，其特 徵在具備： 至少具有第1層及第2層； 上述第1層至少由1個擴散元件塊構成； 上述第2層由重疊於上述第1層之至少1個擴散元件 塊構成；且 在相對於上述第1層之上述第2層的面上，形成多 數之剖面略半圓形的第1凹部； 在相對於上述第2層之上述第1層的面上，以位於 上述第1凹部間之方式形成多數之剖面略半圓形的第2 凹部。 3.如申請專利範圍第1或2項之光擴散元件組裝體，其中 ，構成上述第1層的擴散元件塊與構成上述第2層的擴 散元件塊係作成不同的大小，並使上述第1層的各擴散13⁄43⁄4 Case No. 91110760 Bamboo Year ___月—ry- Amendment 13⁄43⁄4 Case No. 91110760 Bamboo Year ___月—ry- Amendment W Year “Month/?曰修(more) Original Patent Application 1. A light diffusion The element group k is characterized in that light from a light source disposed on the inner surface side is incident on the entire surface W and diffused and emitted, and is characterized in that it has at least a first layer and a second layer; The first layer is composed of at least one diffusing element block superimposed on the first layer, and the cross section of at least one of the first layer and the second layer overlapping surface is abbreviated. Semi-circular recess. 2. A light diffusing element assembly which emits light from a light source disposed on an inner surface side from almost the entire surface of the inner surface and diffuses and emits light, and is characterized in that it has at least a first layer and a second layer; The layer is composed of at least one diffusion element block; the second layer is composed of at least one diffusion element block superposed on the first layer; and a plurality of layers are formed on a surface of the second layer with respect to the first layer a first concave portion having a substantially semicircular cross section; and a second concave portion having a plurality of substantially semicircular cross sections formed on the surface of the first layer with respect to the second layer so as to be located between the first concave portions. 3. The light diffusing element assembly according to claim 1 or 2, wherein the diffusion element block constituting the first layer and the diffusion element block constituting the second layer are different in size, and the first Diffusion of layers 313686修正版.ptc 第23頁 1301918 親議· 年心月，7曰 修正 六、申請專利範圍 元件塊之對接位置與上述第2層的各擴散元件塊之對接 位置不重疊。 4. 一種光擴散元件組裝體，係從内面的幾乎整面入射來 自配置於内面側之光源的光並加以擴散而出射，其特 徵在具備： 至少具有第1層、第2層及第3層； 上述第1層至少由1個擴散元件塊構成； 上述第2層由重疊於上述第1層之至少1個擴散元件 塊構成；313686 Revised Edition.ptc Page 23 1301918 Proposal · Year Heart, 7曰 Amendment VI. Patent Application The docking position of the component block does not overlap with the docking position of each of the diffusion element blocks of the second layer. 4. A light diffusing element assembly which emits light from a light source disposed on an inner surface side from almost the entire surface of the inner surface and diffuses and emits light, and is characterized in that it has at least a first layer, a second layer, and a third layer The first layer is composed of at least one diffusion element block, and the second layer is composed of at least one diffusion element block superposed on the first layer; 上述第3層由重疊於上述第2層之至少1個擴散元 件塊構成；且 於上述第1層與上述第2層重疊面的至少一方形成 多數之剖面略半圓形的第1凹部； 於上述第2層與上述第3層重疊面的至少一方形成 多數之剖面略半圓形的第2凹部； 上述第2凹部位於上述第1凹部之間。 5. —種光擴散元件組裝體，係從内面的幾乎整面入射來 自配置於内面側之光源的光並加以擴散而出射，其特 徵在具備：The third layer is composed of at least one diffusion element block superposed on the second layer; and at least one of the first layer and the second layer overlapping surface forms a plurality of first concave portions having a substantially semi-circular cross section; At least one of the second layer and the third layer overlapping surface forms a plurality of second concave portions having a substantially semi-circular cross section, and the second concave portion is located between the first concave portions. 5. A light diffusing element assembly which emits light from a light source disposed on the inner surface side from almost the entire surface of the inner surface and diffuses and emits it, and is characterized in that: 至少具有第1層、第2層及第3層； 上述第1層至少由1個擴散元件塊構成； 上述第2層由重疊於上述第1層之至少1個擴散元件 塊構成； 上述第3層由重疊於上述第2層之至少1個擴散元件At least a first layer, a second layer, and a third layer; the first layer is composed of at least one diffusion element block; and the second layer is composed of at least one diffusion element block superposed on the first layer; The layer is composed of at least one diffusion element overlapping the second layer 313686修正版.ptc 第24頁313686 Revised Edition.ptc Page 24 1301918 案號 91110760 修正 六、申請專利範圍 塊構成，且 在相對於上述第1層之上述第2層的面上，形成多 數之剖面略半圓形的第1凹部； 在相對於上述第2層之上述第1層的面上，對應於 上述第1凹部的位置形成剖面略半圓形的第2凹部； 在相對於上述第2層之上述第3層的面上，以位於 上述第2凹部間之方式形成剖面硌半圓形的第3凹部； 在相對於上述第3層之上述第2層的面上，對應於 上述第3凹部的位置形成剖面略半圓形的第4凹部。 6. 如申請專利範圍第4或5項之光擴散元件組裝體，其中 ，構成上述第1層的擴散元件塊與構成上述第2層的擴 散元件塊係作成不同的大小； 使上述第1層的各擴散元件塊之對接位置與上述第 2層的各擴散元件塊之對接位置不重疊； 構成上述第2層的擴散元件塊與構成上述第3層的 擴散元件塊係作成不同的大小；使上述第2層的各擴散 元件塊之對接位置與上述第3層的各擴/散元件塊之對接 位置不重疊。 7. 如申請專利範圍第1、2、4、5項中任一項之光擴散元 件組裝體，其中，上述光源係棒狀的螢光棒，且上述 凹部沿著上述螢光燈的長度方向形成線狀。 8. 如申請專利範圍第7項之光擴散元件組裝體，其中，在 上述所有的凹部，填入與上述光擴散元件塊不同折射 率的光透過性物質。1301918 Ref. No. 91110760. Amendment VII. Patent application block configuration, wherein a plurality of first concave portions having a substantially semi-circular cross section are formed on a surface of the second layer of the first layer; and the second layer is opposite to the second layer a second concave portion having a substantially semi-circular cross section corresponding to a position of the first concave portion on a surface of the first layer; and a second concave portion on a surface of the third layer with respect to the second layer A third recess having a semicircular cross section is formed therebetween; and a fourth recess having a substantially semicircular cross section is formed on a surface of the second layer with respect to the third layer corresponding to the position of the third recess. 6. The light diffusing element assembly according to claim 4, wherein the diffusion element block constituting the first layer and the diffusion element block constituting the second layer are different in size; The mating position of each of the diffusing element blocks does not overlap with the mating position of each of the diffusing element blocks of the second layer; and the diffusing element block constituting the second layer is different in size from the diffusing element block constituting the third layer; The butting position of each of the diffusion element blocks of the second layer does not overlap with the abutting position of each of the diffusion/scattering element blocks of the third layer. 7. The light diffusing element assembly according to any one of claims 1 to 2, wherein the light source is a rod-shaped fluorescent rod, and the concave portion is along a longitudinal direction of the fluorescent lamp. Formed in a line shape. 8. The light diffusing element assembly according to claim 7, wherein all of the concave portions are filled with a light transmissive substance having a refractive index different from that of the light diffusing element block. 313686修正版.ptc 第25頁 1301918 ^1±ΛΛα7β —_ 9111Q7Rn^_ 、申請專利Ι&ΐ ' " s正 如申請專利範®第7項之光擴散元 ^ 上述一部份的凹部’填入與上述牛撫裝體，其中，在 射率的光透過性物質。 擴散兀件塊不同折 10 .-種面光源裝置，其特徵在具備 主 2、4、5項中任一項之光擴散元件电申壯明專利範圍第卜 述光擴散元件組裴體的内面侧並將衣體，以及位於上 反射至上述光擴散元件組裝體的自上述光源的光 11. 如申請專利範圍第10項之面光源襞=側之反射構件。 光擴散元件組裝體的出射面侧至；署j中，於上述 12. 種影像顯示裝置，其特徵在具備擴散板。 1 1項之面光源裝置，以及以上 ^利範圍第 像顯示部。 面先源裝置照明的影 13. 如申請專利範圍第3項之光擴散元件組 述光源係棒狀的螢光燈，且上述凹部沿體其中，上 的長度方向形成線狀。 者上述螢光燈 14. 如申請專利範圍第3項之光擴散元件組裝 上述所有的凹部，填入與上述光擴散元不、中，在 率的光透過性物質。 & +同折射 1 5 ·如申請專利範圍第3項之光擴散元件組裝體，发 上述一部份的凹部，填入與上述光擴散元塊、中’在 射率的光透過性物質。 I不同折 16.—種面光源裝置，其特徵在具備：申請專利 # 之光擴散元件組裝體，以及位於上述光-弟3項 ’、狀7L件纟且裝313686 Revised. ptc Page 25 1301918 ^1±ΛΛα7β —_ 9111Q7Rn^_ , Apply for a patent Ι & ΐ ' " s as in Patent Application No. 7 of the Light Diffusion Element ^ The above part of the recess 'fill in With the above-mentioned cow care body, which is a light-transmitting substance at a radio rate. The diffusing element block has different folds. - a kind of surface light source device, which is characterized by having the light diffusing element of any one of the main items 2, 4, and 5, and the inner surface side of the body of the light diffusing element group And a light from the light source that is reflected upward to the light diffusing element assembly. 11. The surface light source 襞=side reflective member of claim 10 of the patent application. In the above-mentioned 12. image display device, the light-diffusing element assembly has a diffusing plate. The surface light source device of item 1 and the above-mentioned range image display unit. The light diffusing element of the light source diffusing element of the third aspect of the invention is a rod-shaped fluorescent lamp, and the concave portion is formed along the longitudinal direction of the body. The above-mentioned fluorescent lamp is incorporated in the light diffusing element of claim 3, and all of the concave portions are filled with a light-transmitting substance which is not in the middle of the light diffusing element. & + co-refraction 1 5 The light-diffusing element assembly of the third aspect of the patent application, wherein the concave portion of the above-mentioned portion is filled with a light-transmitting material having an optical transmittance in the light diffusing element block. I. Folding 16. A kind of surface light source device, which is characterized in that it has a light diffusing element assembly of patent application #, and is located in the above-mentioned light-different 3 item, 7L pieces and loaded 第26頁 1301918 '_案號91110760_年6月曰 修正_ 六、申請專利範圍 體的内面側並將來自上述光源的光反射至上述光擴散 元件組裝體的内面側之反射構件。 1 7 .如申請專利範圍第1 6項之面光源裝置，其中，於上述 光擴散元件組裝體的出射面側至少配置一片擴散板。 1 8. —種影像顯示裝置，其特徵在具備：申請專利範圍第 1 6項之面光源裝置，以及以上述面光源裝置照明的影 像顯示部。 1 9. 一種影像顯示裝置，其特徵在具備：申請專利範圍第 1 7項之面光源裝置，以及以上述面光源裝置照明的影 像顯示部。Page 26 1301918 '_Case No. 91110760_June 曰 Amendment _ VI. Patent application The inner surface side of the body reflects the light from the light source to the reflection member on the inner surface side of the light diffusing element assembly. The surface light source device of claim 16, wherein at least one diffusion plate is disposed on an exit surface side of the light diffusing element assembly. An image display device comprising: a surface light source device of claim 16; and an image display portion illuminated by the surface light source device. An image display device comprising: the surface light source device of claim 17 and the image display portion illuminated by the surface light source device. 313686修正版.ptc 第27頁313686 Revised.ptc Page 27
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