200928175 •.九、發明說明： • 【發明所屬之技術領域】 . 本發明涉及光學領域，尤其涉及一種白光 照明裝置及使用該裝置之檯燈。 【先前技術】 目前，發光二極體（Light Emitting Diode， LED)作為一種固態發光元件’因其具高亮度、 長使用壽命、廣色域（Wide Color Gamut)等特性 ❹ 而被廣泛應用於多種領域之中。 習知之白光發光二極體通常係將藍光晶片 封裝於掺雜有黃色螢光粉層之封裝體内，使藍 光晶片所發出之藍光與黃色螢光粉層受激勵 後發出之黃光混合後得到所需之白光。 惟’發光二極體在使用時，一般需要經過 一導光板，使發光二極體所發出之光經導光板 ^ 之反射面反射後射向導光板之出光面，由導光 板之出光面均勻射出，將點光源轉換成面光 源。此過程中，當利用上述方式所產生之白’光 經過導光板時，會由於棱鏡效應而色散，影響 光之演色性。 【發明内容】 有馨·於此，有必要提供一種具有較好演色 性之白光照明裝置及使用該白光照明裝置之 棱燈。 6 200928175 一種檯燈，包括燈座、支架、燈罩以及 . 光照明裝置，所述支架連接於所述燈座和燈 之間，所述白光照明裝置設於所述燈罩内， 包括一導光板以及至少一固態發光元件，所 導光板包括一出光面，所述導光板之出光面 設有至少一層營光粉層，所述固態發光元件 發出之光入射至導光板後從所述出光面 出，並與所述至少一層螢光粉層受激發所發 ® 之光混合而成白光。 一種白光照明裝置，包括一導光板以及 少一固態發光元件，所述導光板包括一出 面，所述導光板之出光面上設有至少一層螢 粉層，所述固態發光元件所發出之光入射至 光板後從所述出光面射出，並與所述至少一 螢光粉層受激發所發出之光混合而成白光。 上述檯燈之白光照明裝置利用固態發 ❹ 元件所發出之光與設於出光面上之螢光粉 發出之光相混合而產生所需之白光。所述固 發光元件所發出之光通過導光板時，不會由 棱鏡效應而產生色散，從而使獲得之白光具 較好之演色性。 【實施方式】 下面將結合附圖對本發明實施例作進 步之詳細說明。 白 罩 其 述 上 所 射 出 至 光 光 導 層 光 所 態 於 有 7 200928175 蘭1及圖2所示為一種檯燈100,其包括： 燈座2〇、支架30、燈罩40以及白光照明裝置 50 ° ▲所述燈座20位於檯燈100之底部’用於 將檯燈100放置於桌面上。.所述支架30位於 燈座2〇和燈罩40之間，用於支撐並調節燈罩 40之高度。所述白光照明裝置5〇設於燈罩4〇 内，提供合適亮度之燈光，便於人們之工作和 ❹ 學習。 如圖3所示，所述白光照明裝置50包栝： 一導光板5 2以及兩個線性之發光二極體陣列 54。 所述導光板52由透明之壓克力材料 (polymethylmethacrylate， PMMA)或玻璃製 成，其具有一位於導光板52底部之出光面 521、以及位於導光板52頂部且與出光面521 相對之反射面522。如圖2所示’所述出光面 5 21為平面，其上經塗布或粘貼等方式設有一 層黃色螢光粉層523 ’圖2中所示之黃色蟹光 粉層523係通過粘貼之方式設於出光面521 上’實際上黃色榮光粉層523也可以直接塗布 在出光面521上。所述導光板52之反射面522 呈V形，使得所述導光板52之厚度自導光板 52之！右兩側向導光板52之中部逐漸減小’ 8 200928175 該反射面5 22可反射由發光二極體陣列54進 入導光板5 2之光線，使該等光線沿不同之角 度射向導光板52之出光面521’從而均勻分佈 於導光板52之出光面521上並由出光面521 射向導光板52之外部。該v形之反射面522 可增加導光板5 2内之全反射現象，提升出射 光之輝度。可以理解地，該反射面522上可以 塗布一層反光層或者在反射面522上雕刻複數 V形溝槽，以達到更好之反射效果從而獲得具 有較高輝度之出射光。 請一併參閱圖4,所述導光板52之左右兩 側各開設一長條狀之凹槽524，所述凹槽524 用於收容所述發光二極體陣列54，其橫戴面為 矩形。所述凹槽524之底部即所述導光板52 之入射面上設有複數凸點525，所述凸點525 呈四棱錐狀，並緊密排列於所述凹槽5 2 4之底 部，以利於光之導入。 請繼續參閱圖3，所述發光二極體陣列5 4 包括一基板541及設於基板541上之複數發光 二極體542。 所述基板541之橫截面與所述凹槽5 24之 橫截面大致相同，且其橫截面之尺寸略大於所 述凹槽524之橫截面尺寸，使所述發光二極體 陣列54藉由基板541與導光板52間之緊配合 200928175 固定至所述導光板5 2上。所述基板5 41上設 ' 有電氣連線（圖未示）’上述發光二極體542 . 藉由與所述電氣連線相連而與供電電源（圖未 示）電性連接。所述基板5 41由具良好導熱性 之材料，如鋁、銅等金屬材料或陶瓷材料製 成，用以散發發光二極體542工作時所產生之 熱量。當基板541由金屬材料製成時，通常在 電氣連線之外表面塗布一層電絕緣材料，以防 ❿ 止由於基板541導電而造成之短路。 上述發光二極體542為可發出藍光之藍光 二極體，當所述白光照明裝置50工作時，所 述藍光二極體發出藍光’上述藍光沿導光板5 2 之入射面進入導光板52内，並經反射面5 22 反射後照射到導光板52之出光面521上時可 激發黃色螢光粉層523產生黃光，並與該黃光 混合而產生白光。 ❹ 請繼續參閱圖2 ’所述燈罩40包括一上蓋 42及一下蓋44。 所述上蓋42與檯燈1〇〇之支架30相連， 其包括一頂板421以及由頂板421之周緣向下 延伸之侧板422。所述頂板421上設有四個由 頂板421向下垂直凸伸之卡片423,各卡片423 之中部設有一貫穿十片423下端之卡槽424， 所述發光二極體陣列54之基板5 41之前後兩 200928175 端通過緊 '酉己合之方式收容於所 將所述& . ^魂卡 將所述白先照明裝置50固定卞槽424内， 内。 '於所迷燈罩40 所逑Υ ·ν200928175 • 9. Description of the invention: • Technical field to which the invention pertains. The present invention relates to the field of optics, and more particularly to a white light illumination device and a table lamp using the same. [Prior Art] At present, Light Emitting Diode (LED) as a solid-state light-emitting element is widely used in various types due to its high brightness, long life, and wide color gamut. In the field. Conventional white light emitting diodes are generally obtained by encapsulating a blue light wafer in a package doped with a yellow phosphor powder layer, and mixing the blue light emitted by the blue light wafer with the yellow light emitted by the yellow fluorescent powder layer. The white light needed. However, when the light-emitting diode is used, it is generally required to pass through a light guide plate, so that the light emitted by the light-emitting diode is reflected by the reflective surface of the light guide plate and then emitted to the light-emitting surface of the light guide plate, and the light-emitting surface of the light guide plate is uniformly emitted. , convert the point source into a surface source. In this process, when the white light generated by the above method passes through the light guide plate, it is dispersed due to the prism effect, which affects the color rendering property of the light. SUMMARY OF THE INVENTION It is necessary to provide a white light illumination device having better color rendering properties and a prismatic lamp using the white light illumination device. 6 200928175 A desk lamp comprising a lamp holder, a bracket, a lamp cover and a light illumination device, the bracket being connected between the lamp holder and the lamp, the white light illumination device being disposed in the lamp cover, comprising a light guide plate and at least a solid-state light-emitting device, the light guide plate includes a light-emitting surface, and the light-emitting surface of the light guide plate is provided with at least one layer of camping powder, and the light emitted by the solid-state light-emitting element is incident on the light guide plate and exits the light-emitting surface, and White light is mixed with the light of the at least one layer of phosphor powder excited by the light. A white light illuminating device includes a light guide plate and a small solid-state light-emitting element, wherein the light guide plate includes an exit surface, and at least one layer of phosphor powder is disposed on the light-emitting surface of the light guide plate, and light emitted by the solid-state light-emitting element is incident. After being emitted to the light plate, the light is emitted from the light emitting surface, and is mixed with the light emitted by the at least one phosphor layer to form white light. The white light illumination device of the above-mentioned desk lamp uses the light emitted by the solid-state hair-emitting element to mix with the light emitted from the phosphor powder provided on the light-emitting surface to generate desired white light. When the light emitted from the solid-state light-emitting element passes through the light guide plate, dispersion is not caused by the prism effect, so that the obtained white light has better color rendering properties. [Embodiment] Hereinafter, a detailed description will be given of an embodiment of the present invention with reference to the accompanying drawings. The white cover is described as being emitted to the light and light guide layer. 7 200928175 Lan 1 and FIG. 2 show a table lamp 100 comprising: a lamp holder 2 〇, a bracket 30, a lamp cover 40, and a white light illumination device 50 ° ▲ The lamp holder 20 is located at the bottom of the desk lamp 100 for placing the desk lamp 100 on the table top. The bracket 30 is located between the base 2 and the cover 40 for supporting and adjusting the height of the cover 40. The white light illuminating device 5 is disposed in the lamp cover 4 , to provide a suitable brightness light for people to work and learn. As shown in FIG. 3, the white light illumination device 50 includes a light guide plate 52 and two linear light emitting diode arrays 54. The light guide plate 52 is made of transparent polymethylmethacrylate (PMMA) or glass, and has a light exit surface 521 at the bottom of the light guide plate 52 and a reflective surface on the top of the light guide plate 52 opposite to the light exit surface 521. 522. As shown in FIG. 2, the light-emitting surface 521 is a flat surface, and a yellow phosphor powder layer 523 is attached or affixed thereto. The yellow crab light powder layer 523 shown in FIG. 2 is pasted. It is provided on the light-emitting surface 521 'actually, the yellow glory powder layer 523 can also be directly coated on the light-emitting surface 521. The reflective surface 522 of the light guide plate 52 has a V shape, so that the thickness of the light guide plate 52 is from the light guide plate 52! The middle portion of the light guide plate 52 on the right side is gradually reduced. 8 200928175 The reflective surface 5 22 reflects the light entering the light guide plate 52 from the LED array 54 and causes the light to illuminate the light guide plate 52 at different angles. The surface 521 ′ is evenly distributed on the light-emitting surface 521 of the light guide plate 52 and is emitted from the light-emitting surface 521 to the outside of the light guide plate 52 . The v-shaped reflecting surface 522 can increase the total reflection phenomenon in the light guide plate 52, and enhance the brightness of the emitted light. It can be understood that the reflective surface 522 can be coated with a reflective layer or a plurality of V-shaped grooves can be engraved on the reflective surface 522 to achieve a better reflection effect to obtain an exiting light having a higher luminance. Referring to FIG. 4 , a long groove 524 is defined in each of the left and right sides of the light guide plate 52 . The groove 524 is configured to receive the LED array 54 and has a rectangular cross section. . The bottom surface of the groove 524, that is, the incident surface of the light guide plate 52 is provided with a plurality of bumps 525, and the bumps 525 have a quadrangular pyramid shape and are closely arranged at the bottom of the groove 5 2 4 to facilitate Import of light. Referring to FIG. 3 , the LED array 5 4 includes a substrate 541 and a plurality of LEDs 542 disposed on the substrate 541 . The cross-section of the substrate 541 is substantially the same as the cross-section of the recess 524, and the cross-sectional dimension thereof is slightly larger than the cross-sectional dimension of the recess 524, so that the illuminating diode array 54 is supported by the substrate. A tight fit 200928175 between the 541 and the light guide plate 52 is fixed to the light guide plate 52. The substrate 5 41 is provided with an electrical connection (not shown) for the light-emitting diode 542. It is electrically connected to a power supply (not shown) by being connected to the electrical connection. The substrate 511 is made of a material having good thermal conductivity, such as a metal material such as aluminum or copper, or a ceramic material to dissipate the heat generated when the light-emitting diode 542 operates. When the substrate 541 is made of a metal material, a surface of the electrical wiring is usually coated with an electrically insulating material to prevent a short circuit caused by the conduction of the substrate 541. The light-emitting diode 542 is a blue light emitting diode capable of emitting blue light. When the white light illumination device 50 is in operation, the blue light diode emits blue light. The blue light enters the light guide plate 52 along the incident surface of the light guide plate 52. And after being reflected by the reflecting surface 5 22 and irradiated onto the light emitting surface 521 of the light guiding plate 52, the yellow fluorescent powder layer 523 is excited to generate yellow light, and mixed with the yellow light to generate white light. ❹Continuously referring to FIG. 2', the lamp cover 40 includes an upper cover 42 and a lower cover 44. The upper cover 42 is coupled to the bracket 30 of the desk lamp 1 and includes a top plate 421 and a side panel 422 extending downward from the periphery of the top plate 421. The top plate 421 is provided with four cards 423 extending downwardly from the top plate 421. The card 423 is provided with a card slot 424 extending through the lower end of the ten pieces 423. The substrate 5 41 of the LED array 54 is The front and rear two ends of the 200928175 are housed in the inside of the slot 424 by means of a tight fit. 'In the fan shade 40 逑Υ · ν
, 仏下蓋44由玻璃、樹脂笙 成’所述t 3等遷日B _LL ^下蓋44之中部即對_ 月材料製 50之出央 > 愿白光日π 先面521之部位向下凹μ •尽明裴置 44之中卹Λ ^，俊私丄 間隔 供 與白光照明裝置5〇夕，之所述下蓋 ❹ Ο 弋矩離，從而為所述下莫 ％面521間 定之緩衝空間，防止白光=44之中部提 521因燈罩40之下蓋4 置50之 而損壞。 所受到之衝擊 所迷下蓋44之外圍形狀與 422之内表面形狀大致相同，且蓋42之側板 外圍尺寸略大於所述上蓋U 述下蓋44之 表面之尺寸，使燈罩4〇之下彳板> 422之内 之方式安裝至燈罩40之上蓋4 4藉由緊配合 40内部之白光照明裝置5〇，上保濩燈罩 尖銳物體刮傷，進一步地，該t其被外部之 防止外部灰塵進入燈罩40内部蓋44還具有 上述檯燈100之白光照明力效。 光二極體發出之藍光與設：置5〇利用藍 色螢光粉層523受激發後所發面521上之黃 Ο?» ±. tL· ^ X ®之黃光相混合 ^ 需之白光。由於藍光為單色光，故， 當藍光通過導光板52時，不會由於棱鏡效應 11 200928175 而色散，從而使獲得之白光具有較好 . 性。 進一步地，由於上述白光照明裝置 發光二極體陣列5 4設於導光板5 2之凹 内，故可減少發光二極體陣列 54所發 射向導光板5 2時所造成之光損失，進 高出射光之輝度。 本實施例中，採用藍光二極體和黃 ❹ 粉層523之組合，使藍光二極體發出之 黃色螢光粉層523受激發而發出之黃光 生所需之白光。可以理解地，所述發光 和螢光粉也可以採用其他之組合，如採 二極體和紅、綠色螢光粉之組合，或採 光二極體和紅、綠、藍色螢光粉之組合 述發光二極體所發出之光和對應之螢 ^ 激發所發出之光混合後產生所需之白光The underarm cover 44 is made of glass and resin, and the t 3 and the like are moved to the day B _LL ^ the middle part of the lower cover 44 is the center of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Concave μ • The Λ 之中 44 44 44 44 , , , , , , , , , , 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 44 Space, prevent the white light = 44 middle part 521 from being damaged by the lower cover 4 of the lamp cover 40. The shape of the outer surface of the cover 44 is substantially the same as the shape of the inner surface of the cover 422, and the outer peripheral dimension of the side plate of the cover 42 is slightly larger than the size of the surface of the lower cover 44 of the upper cover U, so that the cover 4 is lowered. The cover 4 is mounted to the upper cover 4 of the lamp cover 40. By tightly fitting the white light illumination device 5 inside the 40, the upper cover protects the sharp object from scratching. Further, the t is externally protected from external dust. Entering the inner cover 44 of the lamp cover 40 also has the white light illumination effect of the above-described table lamp 100. The blue light emitted by the photodiode is set to 5: yellow light on the surface 521 of the surface 521 after being excited by the blue phosphor layer 523. » ±. tL· ^ X ® yellow light mixed ^ required white light. Since the blue light is monochromatic light, when the blue light passes through the light guide plate 52, it is not dissipated due to the prism effect 11 200928175, so that the obtained white light has better properties. Further, since the white light illuminating device LED array 5 is disposed in the concave portion of the light guide plate 52, the light loss caused by the light-emitting diode array 54 emitted by the light guide plate 52 can be reduced, and the light is increased. The brightness of the light. In this embodiment, a combination of a blue LED and a layer of ruthenium 523 is used to cause the yellow phosphor layer 523 emitted by the blue diode to be excited to emit white light. It is to be understood that the illuminating and phosphor powder may also be in other combinations, such as a combination of a diode and a red or green phosphor, or a combination of a light-emitting diode and red, green and blue phosphors. The light emitted by the light-emitting diode is mixed with the light emitted by the corresponding fire-emitting diode to produce the desired white light.
Q 用多種螢光粉時，所述螢光粉層可為由 種螢光粉混合後而設之一層螢光粉或 多種螢光粉層相互堆叠而成之多層螢光 本實施例中，採用發光二極體陣列 為上述檯燈100之光源，可以理解地， 採用有機發光二極體陣列等固態發光 列作為檯燈100之光源，使上述固態發 發出之藍光與設於出光面521上之黃色 之演色 50之 槽524 出之光 一步提 色螢光 監光和 混合產 二極體 用藍光 用紫外 ，使上 光粉受 。當採 上述多 由上述 粉。 54作 也可以 元件陣 光元件 螢光粉 12 200928175 層 5 23所發出之黃光相混合而產生所需之 . 光。檯燈1 00之光源也不限於本實施例所述 發光二極體陣列54，其也可僅為一固態發光 件。 本實施例中，白光照明裝置50之導光 52兩側均設有發光二極體陣列54，可以理 地，所述白光照明裝置5 0可以僅在導光板 之一側設置發光二極體陣列5 4。 ❹ 本實施例中，以檯燈為例說明該白光照 裝置，實際上，所述白光照明裝置可用於其 領域，如用作液晶顯示器（LCD)之背光源， 作地板燈，用作玩具燈等，或用於手電燈、 示器内。 综上所述，本發明符合發明專利要件， 依法提出專利申請。惟，以上該者僅為本發 0 之較佳實施例，舉凡熟悉本案技藝之人士， 爰依本發明精神所作之等效修飾或變化，皆 涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明檯燈之一較佳實施例之立 示意圖。 圖2係圖1中檯燈之分解示意圖。 圖3係圖2中白光照明裝置之分解示 圖。 白 之 元 板 解 5 2 明 他 用 指 爰 明 在 應 體 意 13 20 200928175 圖4係圖3之部分放大圖。 【主要元件符號說明】 檯 燈 100 燈 座 支 架 30 燈 罩 上 蓋 42 頂 板 側 板 422 卡 片 卡 槽 424 下 蓋 白 光 昭 明 裝 置 50 導 光 板 出 光 面 521 反 射 面 黃 色 螢 光 粉 層 523 凹 槽 凸點 基板 525 發光二 二極體陣 541 發光二 二極體 40 421 423 44 52 522 524 列 5 4 542 ❹ 14When a plurality of phosphor powders are used, the phosphor powder layer may be a multi-layered phosphor in which one layer of phosphor powder or a plurality of phosphor powder layers are stacked on each other by mixing the phosphor powders, in the embodiment, The light-emitting diode array is the light source of the desk lamp 100. It is understood that a solid-state light-emitting column such as an organic light-emitting diode array is used as the light source of the desk lamp 100, and the blue light emitted by the solid state and the yellow light disposed on the light-emitting surface 521 are used. The coloring 50 slot 524 out of the light one-step color fluorescent monitoring and mixing diodes with blue light with ultraviolet light, so that the glazing powder. When picking more than the above powder. 54 can also be component array optical components fluorescent powder 12 200928175 layer 5 23 yellow light is mixed to produce the desired light. The light source of the desk lamp 100 is not limited to the LED array 54 described in this embodiment, and it may be only a solid state light emitting device. In this embodiment, the light-emitting diode array 54 is disposed on both sides of the light guiding device 52 of the white light illuminating device 50. The white light illuminating device 50 can be disposed on only one side of the light guiding plate. 5 4. ❹ In this embodiment, the white light device is illustrated by taking a desk lamp as an example. In fact, the white light illumination device can be used in the field, such as being used as a backlight of a liquid crystal display (LCD), as a floor lamp, as a toy lamp, etc. , or used in flashlights, in the display. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention are included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a preferred embodiment of a table lamp of the present invention. Figure 2 is an exploded perspective view of the table lamp of Figure 1. Figure 3 is an exploded view of the white light illumination device of Figure 2. The white element plate solution 5 2 Ming He used the finger to explain the meaning of the body 13 20 200928175 Figure 4 is a partial enlarged view of Figure 3. [Main component symbol description] Table lamp 100 Lamp holder bracket 30 Lamp cover upper cover 42 Top plate side plate 422 Card slot 424 Lower cover white light Zhaoming device 50 Light guide plate light-emitting surface 521 Reflecting surface yellow phosphor powder layer 523 Groove bump substrate 525 Light two Polar Body 541 Light Emitting Diode 40 421 423 44 52 522 524 Column 5 4 542 ❹ 14