TW538285B - Surface light source - Google Patents
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- TW538285B TW538285B TW89100378A TW89100378A TW538285B TW 538285 B TW538285 B TW 538285B TW 89100378 A TW89100378 A TW 89100378A TW 89100378 A TW89100378 A TW 89100378A TW 538285 B TW538285 B TW 538285B
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Abstract
Description
538285 五、發明說明α) " — 〔發明所屬之技術領域〕 本發明是關於液晶顯示器之背景光，尤其是有關從導 光板側面利用發光二極體照明之側照式面狀光源。 〔習知技術〕 匕液晶顯不器之背景光係配設於液晶面板的背後而自面 板背面照亮液晶面板，具有可使液晶面板所顯示之文字及 圖形等明瞭化的功能。其中，個人電腦或電視等所使用之 背景光主要是使用將螢光燈等的光源直接設置於液晶的背 後，利用擴散板等使光擴散而作為面狀光源之正下方式， 及使用導光板而自導光板側端面供應光，在導光板内部使 光反射擴散作為面狀光源之側照式的2種照明方式。 一 ΐ Ϊ兩方式雖是以作為照明之液晶面板的大小或液晶 頒不為單凡之容許外觀尺寸、目標價格等作適當選擇或併 用，但是較薄型化要求之筆記型電腦更強烈要求小型化的 :動電活或P H S用背景光係使用側照式，該光源是使用 民耗電之發丨光二極體（L E D )。 一使用该發光二極體之背景光可建議使用三原色之發光 ^極體，將該等光合成獲的白色光的方式，或使用單色發 ^極體作為光源，將此光照射於螢光物質藉其螢光現象 &換波長後獲得白色光的方式。 〔發明所欲解決之問題〕 北但疋，例如使用三原色之發光二極體的方式中，即使 日士月不光中央領域中配設呈幾何學上等價之各色的二極體 τ，在接近導光板之入射側端部的領域中，為了以接近來538285 V. Description of the invention α) " [Technical field to which the invention belongs] The present invention relates to the background light of a liquid crystal display, and particularly to a side-illuminated planar light source using a light emitting diode for illumination from the side of a light guide plate. [Known technology] The backlight of the LCD monitor is arranged on the back of the LCD panel and illuminates the LCD panel from the back of the panel. It has the function of making the characters and graphics displayed on the LCD panel clear. Among them, the background light used in personal computers or televisions mainly uses a light source such as a fluorescent lamp directly behind the liquid crystal, a diffuser plate and the like to directly diffuse the light as a planar light source, and a light guide plate Light is supplied from the side surface of the light guide plate, and the light is reflected and diffused inside the light guide plate as two side-illumination types of planar light sources. One way, two ways, although the size of the LCD panel used as the lighting or the LCD is not an extraordinary allowable appearance size, target price, etc., are appropriately selected or used in combination, but the thinner notebook computers are more demanding for miniaturization : The background light for dynamic electricity or PHS uses a side-illumination type. The light source is a light-emitting diode (LED) that uses electricity for the consumer. A background light using the light-emitting diode can be proposed by using a three-color light-emitting diode, a white light obtained by combining these lights, or a monochromatic emitter as a light source, and irradiating this light to a fluorescent substance A way to obtain white light by changing its fluorescence & wavelength. [Problems to be Solved by the Invention] For example, in the method of using three primary colors of light-emitting diodes, even if the central region of the sun, the moon and the moon is not only equipped with geometrically equivalent diodes τ, In the area of the incident side end of the light guide plate, in order to approach
五、發明說明（2) 自各二極體之光的位置觀測而有造成 生’在獲得背景光全面具有均一色相 又’使用單色光之發光二極體作 一原色中發出波長最短的藍色之藍色 源，將此光照射於具有螢光波長轉換 波長轉換為紅色之螢光物質的波長轉 =獲得的光與穿透此波長轉換層的光 使用單色光之發光二極體作為光 勵光產生螢光之螢光物質點的各點形 光物質層係形成該等點光源的集合體 光二極體所照射之螢光物質層於巨觀 積的白色光源作用，與使用上述三原 式比較可獲得較容易具有色相平衡的 但是，另一方面必須重新設置習知所 例如在導光;板的出光面新設置具備營 導光板的入·射側面端部塗敷·乾燥螢 層’或者在入射側面端部年著固定含 等，增加零件數而隨之產生新的附加 化的原因。 又，例如上述導光板之出光面上 薄膜的方法中，為了在未點亮發光二 螢光物質層的色穿透液晶面板，製品 等問題。又塗敷·乾燥上述螢光物質 色相不平衡現象發 光源上困難。 為光源的方式係使用 發光二極體作為光 為綠色之螢光物質及 換層，利用波長轉換 合成後可獲得白色 源的方 成微觀 °因此 上可作 色之發 白色光 未有的 光物質 光物質 螢光物 工數， 式係使照射激 的點光源，螢 ，利用上述發 為具有一定面 光二極體的方 螢光物質層， 的薄膜，或在 形成螢光物質 質的樹脂層 導致生產性惡 5又置具備螢光物質之 極體的狀態下可看見 上會有視覺印象不良 形成螢光物質層的方 538285 五、發明說明（3) 法中，會有塗敷層之螢光物質濃度 動或剝離等㈣，而黏著固定含螢光物，液體流 中螢光物質層本身雖具均一化，但θ : 刼脂層的方法 之液體流動或氣泡混入等的問題等疋制口 $面會有黏著劑 有問題。 寸 衣σ口扣質穩定面上仍 此外，使用上述螢光物質的各方法中， 色相平衡點而言雖可獲得良好的特性 θ 1 所晷、t昔旦伞入品—八t Α ^ {一疋作為面狀光源、 所要求月豕先全面之發光強度均一性V. Description of the invention (2) Observed from the position of the light of each diode 'has a homogeneous hue in the background light and also uses a monochromatic light emitting diode as the primary color to emit the shortest blue Blue light source, irradiate this light with the wavelength conversion of fluorescent wavelength conversion wavelength to red fluorescent material = obtained light and light penetrating this wavelength conversion layer use a monochromatic light emitting diode as light Each point-shaped light substance layer of the fluorescent substance points that excites the fluorescent light forms the aggregated light source layer irradiated by the light diodes of the point light sources, and acts as a white light source with a large viewing area. It is relatively easy to obtain a hue balance. However, on the other hand, it is necessary to reset the conventional light guide; for example, the light exit side of the board is newly provided with a light guide plate that is coated and dried on the entrance and emission side of the light guide plate. At the end of the incident side, there is a fixed inclusion, and the number of parts is increased, which causes a new addition. In addition, for example, in the method of forming a thin film on the light-emitting surface of the light guide plate, the color of the non-light-emitting luminescent material layer penetrates the liquid crystal panel, the product, and the like. It is also difficult to apply and dry the fluorescent substance to the hue imbalance phenomenon. The method of using the light source is to use a light-emitting diode as the fluorescent material whose light is green and change the layer. After the wavelength conversion is synthesized, a white source can be obtained into a microscopic °, so it can be used as a light emitting material without white light. The number of optical materials and fluorescent materials is based on the use of a point light source that emits light. The fluorescent light uses the above-mentioned square fluorescent material layer with a certain surface light diode, a thin film, or a resin layer that forms a fluorescent material. Evil 5 can be seen in the state of a polar body with a fluorescent substance. There will be a visual impression on the formation of a fluorescent substance layer. 538285 V. Description of the invention (3) There will be a fluorescent substance concentration in the coating layer. The fluorescent substance layer itself is homogenized in the liquid stream by sticking or fixing it, and the liquid substance is homogenized in the liquid stream. There will be problems with the adhesive. In addition, the quality stability surface of the σ-button buckle is still good. In each method using the above fluorescent materials, although the hue equilibrium point can obtain good characteristics, θ 1 is obtained, t is an umbrella product—eight t Α ^ { As a planar light source, the full luminous intensity uniformity required by the moon is first
要。亦即，會有背景光中央部輝度^的：：：有改善的： 領域及遠方領域的輝度相對降低等問題。’-極體附L 本發明是有鑑於上述之問題所研創而成纟，是以不會 導致生產性的惡化，供應具備穩定品質之均一發光強度的 面狀光源為目的。， 七尤強度的 〔解決問題之手段〕 為解決上述之問題，本發明係具備形成薄板狀，使側 端入射面入丨射的光形成平面狀之出光面而放射的導光板， 及光入射於該導光板之側端入射面的光源所成之面狀光源 中’光入射於上述導光板的光源具有發光二極體，入射來 自该發光二極體的光之導光板的側端入射面上，與導光板 一體形成含有轉換來自發光二極體入射之光波長的螢光物 質之複數個透鏡狀微小突起而構成面狀光源。 如上述’本發明係將含螢光物質之透鏡狀微小突起與 導光板一體形成。因此於導光板成形後塗敷·乾燥螢光物 質形成螢光體覆膜，或者於導光板形成後黏著以其他步驟Yes. That is, there is a problem that the luminance of the central part of the background light ^ :: is improved: the luminance of the field and the distant field is relatively reduced. '-Polar body with L The present invention has been developed in view of the above-mentioned problems, and aims at supplying a planar light source having uniform light emission intensity with stable quality without causing deterioration in productivity. [Means for Solving the Problem] In order to solve the above-mentioned problems, the present invention is provided with a light guide plate formed into a thin plate shape, and the light incident from the side entrance surface is formed into a flat light exit surface and emitted, and light is incident. In the planar light source formed by the light source on the side entrance surface of the light guide plate, the light source that is incident on the light guide plate has a light emitting diode, and the side entrance surface of the light guide plate that enters light from the light emitting plate. A planar light source is formed integrally with the light guide plate by forming a plurality of lenticular microprojections containing a fluorescent substance that converts the wavelength of light incident from the light emitting diode. As described above, the present invention is formed by integrating lenticular minute protrusions containing a fluorescent substance with a light guide plate. Therefore, after the light guide plate is formed, the fluorescent material is applied and dried to form a phosphor film, or after the light guide plate is formed, it is adhered to other steps.
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五、發明說 所製作 白勺増加 可抑制 說明（4) 之螢光物質層而構成時，等不致導致問題之零件數 或新的附加工數的產生所導致生產性的惡化等，並 生產品質的不均^一。 含炒又，來自發光二極體的光所入射之側端入射面是具有 極ί光物質之複數透鏡狀微小突起所形成。因此，發光二 抨鸯入射的光是以該複數透鏡狀突起多方向折射形成均一 =政^同時，激勵内部包含的螢光物質進行波長轉換。因 ’错該透鏡狀突起在側端入射面内轉換為任意的發光 ，亚可均一擴散即使在側端入射面附近領域仍可獲得且 有充分輝度的面狀光源。 /、 ^ 此外，與上述導光板的 端入射面以外的其他側端面 面狀的突起所形成，該凸面 部側的密度高於上述對峙面 突起部係於其表面上形成反 段為佳。 出光面對峙的面及導光板之側 隶好疋具有複數個凸面狀或凹 狀或凹面狀的突起係形成周邊 之中央部者為佳。又，上述之 射傳達導光板内部之光反射手V. When the invention is added to the composition of the fluorescent substance layer described in (4), the quality of production will be deteriorated due to the number of parts that do not cause problems or the generation of new additional labor, etc., and production quality. The unevenness ^ one. In addition, the incident surface on the side where the light from the light-emitting diode is incident is formed by a plurality of lens-like microprojections having a polar material. Therefore, the light-emitting light impinges on the incident light with the multiple lenticular protrusions in multiple directions to form a uniform shape. At the same time, the fluorescent substance contained in the light is excited to perform wavelength conversion. Due to this error, the lenticular protrusions are converted into arbitrary light emission in the side-incident surface, and the sub-uniform diffusion is a planar light source with sufficient luminance that can be obtained even in the area near the side-incident surface. /, ^ In addition, it is preferable that the protrusions are formed with surface-shaped protrusions on the other side end face than the end-incident surface of the light guide plate. It is preferable that the density of the convex portion side is higher than that of the facing surface. It is preferable that the light-emitting surface and the side of the light guide plate have a plurality of convex or concave or concave protrusions forming a central portion of the periphery. In addition, the above-mentioned light-transmitting light reflecting hands inside the light guide plate
將上述·’之凹凸狀突起一體設於導光板上，可使導光板 内部進行的光於導光板内部反射擴散而從導光板的出光面 輸出。因此，例如可較設置白色的擴散板等降低吸收損 失，又無須在出光面設置稜鏡片等。因此可減少零件數或 附加工數。又藉著該凹凸面的分布及配設密度的變化，可 提高以往容易不足之導光板周邊部的發光輝度，因此可使 面狀光源整體的輝度均一化。並在該凹凸面的表面形成反 射手段更可提高對於入射光的出光效率。By integrating the uneven protrusions of the above-mentioned "" on the light guide plate, the light conducted inside the light guide plate can be reflected and diffused inside the light guide plate and output from the light exit surface of the light guide plate. Therefore, for example, it is possible to reduce absorption loss compared to the case where a white diffusion plate is provided, and it is not necessary to install a cymbal on the light emitting surface. This reduces the number of parts or additional work. In addition, the distribution of the uneven surface and the change in the arrangement density can increase the luminance of the peripheral portion of the light guide plate, which has conventionally been insufficient, so that the luminance of the entire planar light source can be made uniform. Forming a reflecting means on the surface of the uneven surface can further improve the light extraction efficiency for incident light.
第8頁 538285Page 8 538285
〔發明之實施形態〕 以下，參閱圖示說明本發明之最佳實施形態如下。 首先，表示本發明面狀光源1整體之俯視圖之第工 圖’將此面狀光源1朝發光二極體5的光軸方向切斷之代 表剖視圖由側面所不之側剖面圖顯示於第2圖。 本發明之面狀光源1為複數個發光二極體5，及使側 端入射面1 1入射之發光二極體5的光波長轉換，從出光 面1 5以均一光強度射出之薄板平面狀所形成之導光板1 0所構成’二者皆為未圖示之固定手段固定使其相互位置 一定者。 發光二極體5及後述之螢光物質是藉導光板丄〇之出 光面1 5輸出的光波長可選擇任意組合，但是例如從該出 光面射出白色光時，，最好使用發光波長45〇ηιη左右之高輝 度藍色發光二極體。又，發光二極體5與導光板1 〇之側 端入射面1 1間的間隔，及複數個發光二極體5的相互間 隔（配設間丨距）是從使用之發光二極體的發光強度或光的 發散角、強*度密度分布等來決定。 山^光板1 〇是使用可對丙稀樹脂（甲基丙稀樹脂）聚 =醋等可是光穿透性高的材料，使用射出成形或轉製成 成形手段—體形❹才反平板狀。該導光板之出光面 形成於平滑的平面上，必要時可藉化學轉化處理或 刷、蒸料形成防止出光面的内外面反射之反射防 止馭或部分反射膜、出光限制框等。 入射來自發光二極體5的光之側端入射面1 1係如第[Embodiment of the Invention] Hereinafter, the preferred embodiment of the present invention will be described with reference to the drawings. First, a first plan view showing a plan view of the entire planar light source 1 according to the present invention is shown in the second cross-sectional view of the planar light source 1 cut in the optical axis direction of the light-emitting diode 5. Illustration. The planar light source 1 of the present invention is a plurality of light-emitting diodes 5 and a light-emitting plate 5 that converts the light wavelengths of the light-emitting diodes 5 incident on the side entrance surface 11 and emits light at a uniform light intensity from the light-emitting surface 15. The formed light guide plate 10 is composed of both of which are fixed by a fixing means (not shown) so that their positions are fixed to each other. The light-emitting diode 5 and the fluorescent substance described later can select any combination of wavelengths of light output from the light-emitting surface 15 of the light guide plate 丄 〇. For example, when white light is emitted from the light-emitting surface, it is preferable to use a light-emitting wavelength of 45. ηιη high brightness blue light emitting diode. The distance between the light-emitting diode 5 and the incident surface 11 at the side end of the light guide plate 10 and the distance between the plurality of light-emitting diodes 5 (arrangement) are from the light-emitting diodes used. It is determined by the luminous intensity, the divergence angle of light, and the intensity distribution. The light board 1 〇 is made of acrylic resin (methacrylic resin) poly = vinegar and other materials that have high light permeability, and is injection molded or converted into a molding method-the body shape is only flat. The light-emitting surface of the light guide plate is formed on a smooth plane. If necessary, it can be formed by a chemical conversion treatment, brushing, or steaming to form a reflection prevention or partial reflection film, a light-restriction frame, etc., which prevents the internal and external reflection of the light-emitting surface. The side incident surface 1 1 of the light incident from the light-emitting diode 5 is as described above.
538285538285
五、發明說明（6) 3圖或第4 成凸面或凹 形等的成形 從發光 3種類的點 透鏡狀突起 散的同時， 激勵進行波 含於該 述導光板之 但是在輸出 色波長轉換 波長轉換為 量混合利用 分散於該突 &色螢光物 形所成。/1 入射於 利用透鏡狀 在擴散過程 轉換為紅色 波長轉換為 突的狀態下 1 1 b内是 圖所示 面透鏡 手法與 二極體 線所例 lip 在該擴 長轉換 透鏡狀 出光面 白色光 為紅色 綠色光 上述雙 起部内 質與綠 ’内部 狀之透 導光部 射入的 示’藉 (或者 散過程 0 突起部 1 5輸 時，使 光之紅 之含有 色成形 部。並 色螢光 均一分散含有螢光物質，具有形 鏡狀突起部1 1 b，即藉雙色成 一體形成。 光係如第3圖（或第4圖）中以 設於透鏡狀突起部1 2 b之複數 1 1 η )朝著多方向折射均一擴 中與内部所含之螢光物質衝突而 11b之螢光物質雖可藉來自上 出之光的波長進行種種的選擇， 用含有使光源之發光二極體的藍 色螢光物質的小球，及將藍色光 綠色螢光物質的小球，將該等等 的手法與導光板一體成形而均一 且，也可以預先製作含有等量之 物質等的小球，利用此等雙色成 j述所形成之透鏡狀突起部11b的藍色光是 穴起1 1 p或1 1 n多方向均一擴散的同時， 中使其光的一部份與紅色螢光物質衝突而波長 光’另外其他部分則是與綠色螢光物質衝突而 綠色光，剩餘的一部份並未與該等螢光物質衝 通過。其結果，在側端入射面的透鏡狀突起部 將該等3原色混合形成白色光，且均一擴散入V. Description of the invention (6) 3 or the 4th convex or concave shape is scattered from the light-emitting 3 kinds of point lens-like protrusions, and the excitation wave is contained in the light guide plate, but the wavelength is converted at the output color wavelength The amount was converted into a mixture and dispersed in the shape of the phosphor. / 1 is incident in a state where the lenticular shape is converted into a red wavelength and the wavelength is projected in the diffusion process. 1 1 b is the example of the surface lens method and the diode line shown in the figure. The white light on the extended conversion lenticular light output surface is Red and green light The above-mentioned double-stroke internal substance and the green 'internally shaped' light-transmitting part is injected (or scattered process 0 when the protruding part 15 is lost, so that the red light contains the color forming part. Fluorescence The fluorescent substance is uniformly dispersed, and has shaped mirror-shaped protrusions 1 1 b, that is, formed by integrating two colors. The light system is as shown in Figure 3 (or Figure 4). 1 η) The refraction uniformly expands in multiple directions and conflicts with the fluorescent substance contained in it. Although the fluorescent substance of 11b can make various selections by the wavelength of the light from the above, a light-emitting diode containing a light source is used. Pellets of blue fluorescent material, and pellets of blue light green fluorescent material, which are uniformly molded with the light guide plate and the like, and can also be prepared in advance with pellets containing the same amount of material Using these two colors The blue light of the lenticular protrusion 11b formed in the above description is uniformly diffused in multiple directions from 1 p or 1 1 n, and part of the light is in conflict with the red fluorescent substance and the wavelength light is' other Some are in conflict with green fluorescent substances and green light, and the remaining part does not pass through these fluorescent substances. As a result, the lenticular protrusions on the side-incident surface mix the three primary colors to form white light, and uniformly diffuse into the light.
第10頁 538285 五 、發明說明（7) 射於透明導光部。又白色光是藉透鏡狀突起iip、ii η 2 :擴散’ 0此側端入射面附近領域同樣可獲得具有充 伤輝度的面狀光源。 、此外，如上述在透鏡狀突起部1 1 b使螢光物質均一 if Γϋ波長轉換部的方法之夕卜，例如以導光板之透光 質！為透鏡狀突起部11 b，在透鏡狀突 螢i物所之二ΐ Z導光板之境界層部份更設置含有如上述 二，果。X，上述之螢光物 鏡狀突起1 1 Ρ或i i η的表面。&了以層狀5又置在透 其次，說明與本發明面狀光 對峙的面4後僅料丨 ^ 面1 5 面1 1以外之其他的側端面丄3之丄】、：上述侧端入射 2、1 3具有複數個凸面 ° : 5亥等面1 手段構成一體’並在出光北2起而糟射出成形等 膜。並且此凸面狀或 7 精瘵鍍等手段形成反射 :^所示·’·變化其 工圖或弟6圖、 U為:j說明上述所構成各面以成。以後以出光 背面1 2所系模式顯示導光板1 0的出光 先板内部來看則是大起（導光板全體係呈凹面、透 __/突起的分佈對於出光面的反射：Π是表不稷Page 10 538285 V. Description of the invention (7) The light is transmitted to the transparent light guide. The white light is obtained by the lens-like protrusions iip, ii η 2: Diffusion '0. A planar light source having a flawed luminance can also be obtained in the area near the incident surface at the side end. In addition, as described above, the method of making the fluorescent substance uniform at the lenticular protrusion 1 1 b if Γϋ the wavelength conversion unit is, for example, the light transmission quality of the light guide plate! It is a lenticular protrusion 11 b, and the boundary layer portion of the Z light guide plate of the lenticular fluorescein object II is further provided with the above-mentioned two fruits. X, the surface of the above-mentioned fluorescent objective lens-like protrusion 1 1 P or i i η. & The layer 5 is placed next to it, and the surface 4 facing the planar light of the present invention will be explained. Only the side surface 5 other than the surface 1 (surface 3 of the surface 1)] ,: End-incidences 2, 1 and 3 have a plurality of convex surfaces. °: 5 and other planes are integrated as a unit, and the film is emitted from the north of Idemitsu 2 and formed. And this convex surface or 7 fine 瘵 plating and other means to form a reflection: ^ shown · '· change its work drawing or figure 6, U is: j to explain the above structure of each surface. In the future, the mode of the light-emitting back 12 shows that the light-emitting plate 10 of the light guide plate 10 is large when viewed from the inside. Ji
第11頁 :傳達光線時^::反：面）"…照射導光板 射於其中一個樣子’纟中第5圖是表示 數個凹面肤#爿穴起時的光擴散狀況，第fi R θ ~ 五、發明說明（8) 如該等所述 擴散，各個凹面 又，如上述突起 佈密度變化，例 當變更對於出光 在谷易不足之導 數設置上述的突 整體的輝度分佈 第7圖的第 反’在導光板1 述相同從透光板 的擴散反射狀態 大起1 2時，相 設置凹面狀突起 點光源作用，又 對出光面1 5的 輝度分佈的:均一 ’各個凹面 片大突起1 2 4之分佈密 如第6圖同 面的光分佈 光板周邊部 起部可提高 均一化。 8圖係以模 0的出光背 内部看時為 。從該等兩 對於同一人 1 2 η時相 藉該突起1 光分佈密度 化0 狀突起1 2 η係將熱射光反射 η分別具有點光源的作用。 度的變化，可使各點光源的分 一方向之反射光密度所示，適 密度可調節光量分佈。因此以 的出光背面上，可於中央部多 發光輝度，因此可使面狀光源 式表示與第5圖及第6圖相 面1 2形成凸面狀突起（與上 凹面狀反射面）12ρ時之光 圖來看，一旦設置上述凹面狀 射角的光反射角不同，與各別 同，各個突起可擴散光而作為 2 ρ之分佈密度的變化可調節 。因此可獲得面狀光源整體之 如上述’在出光背面1 2及側端入射面以外的側端面 1 3設置凹面狀或凸面狀突起部，可擴散反射導光板1 〇 部傳達的光而可提高出光面的發光輝度，又可適當調節上 述凹面或凸面或该等兩者的分佈密度，可獲得以均一輝度 分佈、均一放射角度分佈輸出白色化後輸出光的面狀光 源。 〔發明效果〕Page 11: When conveying light ^ :: reverse: surface) " ... Illuminating the light guide plate on one of the faces' 纟 中 Figure 5 shows the light diffusion status of several concave skins # 爿 孔 起, fi r θ ~ V. Description of the invention (8) As described above, the diffusion of each concave surface and the density of the protruding cloth as described above are changed. For example, when the derivative of the light emission in the valley is insufficient, the luminance distribution of the above protrusion is set as shown in Figure 7 When the light guide plate 1 is the same as the diffuse reflection state of the light-transmitting plate 1 as described above, when the light guide plate 1 is 12 and the concave light-emitting protrusions act as a point light source, the brightness distribution of the light-emitting surface 15 is uniform: each concave piece has large protrusions. The distribution of 1 2 4 is as dense as that of the light distribution light plate at the same surface as that in FIG. 6, which can improve uniformity. The figure 8 is taken from the inside of the light-emitting back of mode 0. From the two to the same person, the light distribution density of the protrusion 1 by the protrusion 1 2 η is 0. The protrusion 1 2 η reflects the heat radiation light η has the function of a point light source. The change in degree can make the reflected optical density of the point light source in one direction, and the appropriate density can adjust the light quantity distribution. Therefore, the light-emitting back surface can be multi-luminous in the central portion, so that the planar light source type can be expressed when the convex surface (concave reflective surface) 12ρ is formed with the surface 12 of FIG. 5 and FIG. Looking at the light diagram, once the concave reflection angle is set, the projection angle can be adjusted to change the distribution density of 2ρ. Therefore, it is possible to obtain the entire planar light source as described above by providing concave or convex protrusions on the side end surface 13 other than the light exit back surface 12 and the side incident surface. The light transmitted by the light guide plate 10 can be diffused and improved. The luminous brightness of the light emitting surface can be adjusted by the above-mentioned concave or convex surface or the distribution density of both of them to obtain a planar light source that outputs white light with uniform brightness distribution and uniform radiation angle distribution. [Inventive effect]
第12頁 538285 五、發明說明（9) 具備形成薄 放射出之導 源所成之面 極體，入射 上，例如藉 射之光波長 形成而構成 後塗敷·乾 其他步驟所 的增加或新 得解決，並 板狀使導光 光板，及光 狀光源中， 來自該發光 一色成形等 的螢光物質 面狀光源。 燥形成螢光 製作之螢光 的附加工數 可抑制生產 如以上說明，根據本發明，其 板之側端入射面入射的光從出光面 入射於該導光板之側端入射面的光 光入射於導光板之光源具有發光二 二極體的光之導光板的側端入射面 手段使含有轉換來自發光二極體入 之複數個透鏡狀突起與導光板一體 因此，螢光物質於導光板成形 體覆膜，或者導光板形成後黏著以 物質層構成時等產生問題之零件數 的產生所導致生產性惡化等皆可獲 品質的不均一性。 又，入射來自發光二極體的光之側端入射面是具 螢光物質之複數個透鏡狀突起所形成。因此，從發光二= 體所入射的光是以該等複數個透鏡狀突起朝多方向折&擴 散的同時，〖在此擴散過程中與内部所含之螢光物質衝突: 激勵進行波·長轉換。因此，入射光係於該透鏡狀突起^ 長轉換為任意的發光色，且均一地擴散，因此即使側# ^ 射面附近的出光面仍可獲得具有充份輝度之面狀光源： 此外’與上述導光板之出光面對峙的面及導光板之 端入射面以外的其他側端面最好是由具有複數個凸面狀或 凹面狀突起所形成，該等凸面狀或凹面狀突起最好是带1 周邊部份側之密度高於與上述出光面對峙面的中央部^ 又上述之大起部最好在其表面形成可反射導光板内部傳Page 12 538285 V. Description of the invention (9) It is equipped with a surface polar body formed by a thin radiation source, which is incident, for example, formed by the wavelength of the emitted light, and then added or newly obtained by other steps. To solve the problem, the light guide plate and the light source are plate-shaped, and the fluorescent material is a planar light source that emits a single color. As described above, according to the present invention, the light incident on the side entrance surface of the plate is incident from the light exit surface to the side entrance surface of the light guide plate. The light source of the light guide plate has a side entrance surface means of the light guide plate having light emitting diodes, so that a plurality of lenticular protrusions containing light from the light emitting diodes are integrated with the light guide plate. Therefore, a fluorescent substance is formed on the light guide plate. Nonuniformity in quality can be obtained by a body coating, or a problem in productivity caused by the number of parts that are problematic when the light guide plate is formed and adhered with a material layer. In addition, the side incident surface where the light from the light emitting diode is incident is formed by a plurality of lenticular protrusions having a fluorescent substance. Therefore, while the light incident from the light-emitting body is folded and diffused by these lenticular protrusions in multiple directions, the conflict with the fluorescent substances contained in the diffusion process during this diffusion process: stimulates the wave. Long conversion. Therefore, the incident light is converted into an arbitrary luminous color by the length of the lenticular projection, and is uniformly diffused. Therefore, even if the light emitting surface near the side # ^ emitting surface can obtain a planar light source with sufficient brightness: In addition, and The light-exiting face of the light guide plate and the side end face other than the end incident surface of the light guide plate are preferably formed by a plurality of convex or concave protrusions, and the convex or concave protrusions are preferably bands. The density of the peripheral part side is higher than that of the central part facing the light-emitting surface ^ and the large raised part is preferably formed on the surface to reflect the light guide plate.
第13頁 538285Page 13 538285
達的光之反射手段。 將 内部進 輸出。 失，又 件數與 對應出 容易不 分佈及 成反射 〔圖式 上述之凹 行的光在 因此’例 可不需將 附加工數 光面所觀 足之導光 放射角度 手段，可 之簡單說 凸狀突 導光板 如可較 稜鏡片 。又， 測的輝 板周邊 分佈均 藉此更為提高對於 明〕 起一體設置 内部反射擴 設置白色擴 等設置於出 使該等凹凸 度予以適當 部的發光輝 一化。並可 於導光板， 散而從導光 散板等時降 光面上。因 面的分佈及 變化，藉此 度’使面狀 在該等凹凸 入射光的出 可使導光板 板的出光面 低吸收損 此可降低零 配設密度可 可提高以往 光源的輝度 面的表面形 光效率。 第1圖係表示本發明的面狀光源構成之俯視圖。 第2圖為上述面狀光源之側剖視圖。 第3圖是表示設於上述面狀光源側端入射面之凸面狀 透鏡狀突起部的入射光之擴散狀態說明圖 第4圖是表示設於上述面狀光源側端入射面之凹面狀 透鏡狀突起·_部的入射光之擴散狀態說明圖 第5圖是表示與上述面狀光源之出光面對峙的面或設 於側端入射面以外之其他側端面的凹面狀突起部之光擴散 狀態說明圖。 ~ 第6圖係表示使上述凹面狀突起部之分佈變化時的反 射光分佈密度之說明圖。 第7圖是表示與上述面狀光源之出光面對峙的面或設 於側端入射面以外之其他側端面的凸面狀突起部之光擴散Means of reflection of light. Input and output internally. It is easy to not distribute and reflect the number of pieces corresponding to the figure. [The pattern of the above-mentioned recessed light is therefore 'example'. It is not necessary to use the additional means to guide the light emission angle of the light surface. It can be simply said convex. The light-like projection light guide plate may be more like a sepal. In addition, the measured peripheral distribution of the glow plate is thereby further improved. For internal lighting, internal reflection spreading, white spreading, and the like are set to make the unevenness of the unevenness of the unevenness of the unevenness. It can be scattered on the light guide plate, and fall off from the light guide diffuser and so on. Due to the distribution and change of the surface, the degree of surface light incident on these irregularities can reduce the absorption loss of the light exit surface of the light guide plate. This can reduce the zero configuration density and can improve the surface shape of the brightness surface of the conventional light source. Light efficiency. Fig. 1 is a plan view showing the structure of a planar light source according to the present invention. Fig. 2 is a side sectional view of the planar light source. Fig. 3 is an explanatory view showing a diffused state of incident light of a convex lenticular projection provided on the incident surface of the planar light source side end. Fig. 4 is a concave lenticular shape of the incident surface provided on the planar light source side end. Figure 5 illustrates the diffusion state of the incident light from the protrusions. Figure 5 shows the light diffusion state of the concave protrusions on the side facing the light output from the planar light source or on the side end surface other than the side incident surface. Illustration. Fig. 6 is an explanatory diagram showing the reflected light distribution density when the distribution of the concave-shaped protrusions is changed. Fig. 7 is a diagram showing light diffusion from a surface facing the light emission from the planar light source or a convex-shaped protrusion provided on a side end surface other than the side end incidence surface;
第14頁 538285 _ 五、發明說明（11) 狀態說明圖。 第8圖係表示使上述凸面狀突起部之分佈變化時的反 射光分佈密度之說明圖。 〔符號說明〕 I 面狀光源 5 發光二極體 10 導光板 II 側端入射面 1 1 P ， 1 1 η 透 鏡 狀 突 起 1 2 對 峙 於 出 光 面 的 面 1 3 側 端 入 射 面 以 外 之其他側端面 1 5 出 光 面 1 2 P 凸 面 狀 之 突 起 1 2 η 凹 面 狀 之 突 起Page 14 538285 _ V. Description of the invention (11) State description diagram. Fig. 8 is an explanatory diagram showing the reflected light distribution density when the distribution of the convex-shaped projections is changed. [Description of Symbols] I planar light source 5 light-emitting diode 10 light guide plate II side entrance surface 1 1 P, 1 1 η lens-like protrusions 1 2 facing the light exit surface 1 3 side end surface other than the side entrance surface 1 5 light emitting surface 1 2 P convex protrusion 1 2 η concave protrusion
第15頁 538285 圖式簡單說明 第16頁Page 15 538285 Illustration of the schematic Page 16
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10343027A JP2000171796A (en) | 1998-12-02 | 1998-12-02 | Surface light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW538285B true TW538285B (en) | 2003-06-21 |
Family
ID=18358378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW89100378A TW538285B (en) | 1998-12-02 | 2000-01-12 | Surface light source |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2000171796A (en) |
| TW (1) | TW538285B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6768525B2 (en) * | 2000-12-01 | 2004-07-27 | Lumileds Lighting U.S. Llc | Color isolated backlight for an LCD |
| JP2002182204A (en) * | 2000-12-12 | 2002-06-26 | Optrex Corp | Backlight for liquid crystal display element |
| CN100394274C (en) * | 2003-06-04 | 2008-06-11 | 友达光电股份有限公司 | LED assembled light source and light negative module |
| CN100395629C (en) * | 2003-09-30 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Area light source device and liquid crystal display |
| KR101142519B1 (en) | 2005-03-31 | 2012-05-08 | 서울반도체 주식회사 | Backlight panel employing white light emitting diode having red phosphor and green phosphor |
| WO2006126817A1 (en) | 2005-05-24 | 2006-11-30 | Seoul Semiconductor Co., Ltd. | Green phosphor of thiogallate, red phosphor of alkaline earth sulfide and white light emitting device thereof |
| KR100724591B1 (en) | 2005-09-30 | 2007-06-04 | 서울반도체 주식회사 | Light emitting device and LCD backlight using the same |
| EP1999232B1 (en) | 2006-03-16 | 2017-06-14 | Seoul Semiconductor Co., Ltd | Fluorescent material and light emitting diode using the same |
| CN102943975B (en) * | 2012-11-05 | 2015-11-25 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| JP2014235891A (en) * | 2013-06-03 | 2014-12-15 | Ｎｓマテリアルズ株式会社 | Light guide element, backlight unit, and light guide element manufacturing method |
| JP6830787B2 (en) * | 2016-10-17 | 2021-02-17 | 株式会社ジャパンディスプレイ | Lighting device and display device |
| CN115980909B (en) * | 2023-03-22 | 2023-07-18 | 惠科股份有限公司 | Light emitting component and display device |
-
1998
- 1998-12-02 JP JP10343027A patent/JP2000171796A/en active Pending
-
2000
- 2000-01-12 TW TW89100378A patent/TW538285B/en not_active IP Right Cessation
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|---|---|
| JP2000171796A (en) | 2000-06-23 |
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