201220261 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種LED顯示裝置。 【先前技術】 [0002] 發光二極體（Light Emitting Diode，LED)是一種可 ， 將電流轉換成特定波長範圍的光的半導體元件。發光二 極體以其亮度高、工作電壓低、功耗小、易與積體電路 匹配、驅動簡單、壽命長等優點，從而可作為光源而廣 泛應用於照明領域。 〇 [0003] 發光二極體因具光質佳、體積小、環保及發光效率高等 優勢已逐漸取代冷陰極螢光燈而作為各種顯示看板的光 源。一般的顯示看板通常由光源與透明導光板組成，光 源通常設置於導光板的側面。導光板的出光面上形成有 缺陷以破壞光在導光板上的全反射，從而使光源所發出 的光從缺陷的部位出射。上述的缺陷組成若干圖案，從 而組成需要顯示的内容。然而，在這種廣告面板中，由 Q 於需要在導光板上製作微绪構，其製作到較為困難。並 且，該廣告看板所顯示的圖案的顏色與光源的顏色相同 ，其顯示效果較為單一。 【發明内容】 [0004] 有鑒於此，有必要提供一種顯示色彩較為豐富的LED顯示 裝置。 [0005] 一種LED顯示裝置，其包括光源及導光板。所述導光板具 有入光面與出光面。光源鄰近入光面設置，光源所發出 的光從導光板的入光面入射並且從導光板的出光面出射 099138277 表單編號A0101 第3頁/共13頁 0992066690-0 201220261 [0006] [0007] [0008] [0009] [0010] 。所述導光板的出錢設置有由第_螢光粉塗布而成的 圖案與由第二螢光粉塗布而成的圓案。所述第一螢光粉 文光源激發後所發出的光的顏色不同於第二螢光粉受光 源激發後所發出的光的發光顏色。 藉由在導光板的出光面設置由第-螢光粉塗布而成的圖 案與由第二螢光粉塗布而成的圖案。由於該第一螢光粉 由光源激發後所發出光線的顏色不同於第二螢光粉由光 源激發後所發出光線的顏色，從而使到該顯示裝置所顯 示的色彩比較豐富。 下面參照附圖，結合具體實施例對本發明作進一步的描 、 迅0 :.. : -.. 【實施方式】 如圖1所示，一種LED顯示裝置1〇〇，包括光源11G與導光 板 120。 所述光源110為發光二極體或者鐳射二極體。所述發光二 極體排列成陣列形狀，其設置於一基板113的表面。該光 源110為顯示裝置提供相應的照明光線。 所述‘光板120由透明材料製成，其製作材料包括聚曱基 丙烯酸甲酯（PMMA)、聚碳酸酯（pc)、玻璃（glass )與環氧樹脂（epoxy)等。所述導光板12〇具有一個入 光面121與一個出光面122。所述光源11〇鄰近入光面121 設置，光源110所發出的光從導光板Ko的入光面121入 射’然後從導光板120的出光面122出射。導光板12〇上 塗覆有由第一螢光粉130組成的字母圖案a與由第二螢光 099138277 表單編號A0101 第4頁/共13頁 0992066690-0 201220261 粉140組成的字母圖案Β。所述第一螢光粉13〇受光源ιι〇 發出光線的激發而發出第一種顏色的光線，所述第二螢 光粉140受光源11〇發出光線的激發而發出第二種顏色的 光線。 [0011] ο201220261 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to an LED display device. [Prior Art] [0002] A Light Emitting Diode (LED) is a semiconductor element that converts current into light of a specific wavelength range. The light-emitting diode is widely used in the field of illumination because of its high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life. 〇 [0003] Light-emitting diodes have gradually replaced cold cathode fluorescent lamps as light sources for various display panels because of their superior light quality, small size, environmental protection and high luminous efficiency. A typical display kanban usually consists of a light source and a transparent light guide plate, and the light source is usually disposed on the side of the light guide plate. A defect is formed on the light-emitting surface of the light guide plate to destroy the total reflection of the light on the light guide plate, so that the light emitted from the light source is emitted from the defect portion. The above defects constitute a number of patterns to constitute what needs to be displayed. However, in such an advertisement panel, it is difficult to make a micro-structure on the light guide plate by Q. Moreover, the color of the pattern displayed by the advertisement billboard is the same as the color of the light source, and the display effect is relatively simple. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide an LED display device having a rich display color. [0005] An LED display device includes a light source and a light guide plate. The light guide plate has a light incident surface and a light exit surface. The light source is disposed adjacent to the light incident surface, and the light emitted by the light source is incident from the light incident surface of the light guide plate and is emitted from the light exit surface of the light guide plate. 099138277 Form No. A0101 Page 3 / Total 13 Page 0992066690-0 201220261 [0006] [0007] [ 0008] [0009] [0010]. The money for the light guide plate is provided with a pattern coated with the first fluorescent powder and a circular coated with the second fluorescent powder. The color of the light emitted by the first fluorescent powder source after excitation is different from the color of the light emitted by the second phosphor after being excited by the light source. A pattern coated with the first phosphor and a pattern coated with the second phosphor are provided on the light-emitting surface of the light guide plate. Since the color of the light emitted by the first phosphor after being excited by the light source is different from the color of the light emitted by the second phosphor after being excited by the light source, the color displayed to the display device is richer. The present invention will be further described with reference to the accompanying drawings in conjunction with the specific embodiments. FIG. 1 shows an LED display device 1A including a light source 11G and a light guide plate 120. . The light source 110 is a light emitting diode or a laser diode. The light emitting diodes are arranged in an array shape and are disposed on a surface of a substrate 113. The light source 110 provides corresponding illumination light to the display device. The 'light panel 120' is made of a transparent material, and its manufacturing materials include polymethyl methacrylate (PMMA), polycarbonate (pc), glass, epoxy, and the like. The light guide plate 12 has a light incident surface 121 and a light exit surface 122. The light source 11 is disposed adjacent to the light incident surface 121, and light emitted from the light source 110 is incident from the light incident surface 121 of the light guide plate Ko and then exits from the light exit surface 122 of the light guide plate 120. The light guide plate 12 is coated with a letter pattern a composed of the first phosphor powder 130 and a letter pattern 组成 composed of the second phosphor 099138277 Form No. A0101 Page 4 / Page 13 0992066690-0 201220261 Powder 140. The first phosphor powder 13 is excited by the light emitted by the light source to emit light of a first color, and the second phosphor 140 is excited by the light emitted by the light source 11 to emit light of the second color. . [0011] ο
GG
[0012] 在本實施例中，所述光源110為藍光發光二極體，其發出 的光線的波長耗圍為435nra到475nm。相應地，所述第一 螢光粉130為綠光螢光粉，其受光源11〇所發出的藍色光 的激發而發出綠光波長範圍内的光線。所述第二螢光粉 140為紅光螢光粉，其受光源11〇所發出的藍色光的激發 而發出紅光波長範圍内的光線^當光源11〇開啟時，所述 第一螢光粉130將發出綠光而形成一個綠色的字母A，所 述第二螢光粉140將發出紅光而形成一個紅色的字母B。 可見，在上述的LED顯示裝置1〇〇中，由於不同的圖案可 利用不同的顏色來顯示，其顯示顏色較為豐富，顯示效 果較好。另夕卜由於第-螢光粉13〇與第二螢光粉14〇是 藉由塗覆的方法形成在導光板12〇的出光本上的。根據顯 不内容的需要，所述第一螢光粉13〇與第二螢光粉14〇可 以有效地被去除，同時，將螢光粉塗覆成新的圖案，以 適應顯示的需要。所述的顯示内容可以是漢字字母或 者其任意組合，亦可以是圖案、或者圖案與任意字元的 組合。 根據需要，在除第-螢光粉13〇與第二螢光粉14〇的塗布 區域以外的地方塗覆-層不透明物f，該不透明物質可 以對除第-螢光粉130與第二螢光粉14〇以外區域所出射 的光線進行遮檔，使其不會影響到第—榮光粉13〇與第二 099138277 表單編號A0101 第5頁/共13頁 0992066690-0 201220261 [0013] [0014] [0015] [0016] [0017] 螢光粉140所顯示的圖案。 根據需要’所述光源11G亦可以採用發紫色^紫外線的 發光二極體’其發光的波長小於4〇〇抓。所述第一營光粉 1 30又|色光或|外線的激發而發出綠光而形成綠色的字 母A第—螢光粉14 0受紫色光或紫外線的激發而發出紅 光而形成紅色的字母B。 根據需要，在上述的LED顯示裝置1〇〇中導光板12〇的 出光面還包括塗覆有由第二螢光粉15〇組成的字母圖案c 弟一螢光粉150為黃光螢光粉，其受光源11〇所發出的 藍色光的激發而發出黃光波長範圍内的光線。當光源110 開啟時，所述導光板上還將會顯示有一個黃色的字母c。 在上述實施例中，所述第一螢光粉與第二螢光粉由相同 波長的光線所激發而發光。事實上，所述第一螢光粉與 第一螢光粉亦可以由不同波長範圍内的光線激發而發光 〇 請參見圖2，本發明第二實施例提供了一種LED顯示裝置 200 ’該LED顯示裝置2〇〇包括光源210與導光板220。 所述光源210包括第一種光源211與第二種光源212。所 述第一種光源211與第二種光源212間隔設置於基板21 3 上。所述第一種光源211所發出的光線的波長小於所述第 二種光源212所發出的光線的波長。在本實施例中，所述 第一種光源211與第二種光源21 2為發光二極體或者鐳射 二極體’兩者交錯排列而形成陣列形狀。所述第一種光 源211發出藍色波長範圍内的光線，其發光波長為4351111] 099138277 表單編號A0101 第6頁/共13頁 0992066690-0 201220261 到475nm。所述第二種光源212發出綠色波長範圍内的光 線，其發光波長為500nm到560nm。所述第一種光源211 與第二種光源212的開啟與關閉可被分別控制，從而使到 第一種光源211與第二種光源212可分別單獨開啟或共同 開啟。 [0018] 所述導光板220具有一個入光面221與一個出光面222。 Ο 所述光源210鄰近入光面221設置，光源210所發出的光 從導光板220的入光面221入射，然後從導光板220的出 光面222出射。導光板220上塗覆有由第一螢光粉230組 成的字母圖案A與由第二螢光粉240組成的字母圖案B。與 第一實施例不同的是’所述第一螢光粉230受第一種光源 211所發出的光的激發而發出第一種顏色的光線。所述第 二螢光粉240受第二種光源212所發出的光的激發而發出 第二種顏色的光線。 [0019] Ο 在本實施例中’所述第一螢光粉230為部光螢光粉，其受 第一種光源211所發出的藍色光線的激發而發出綠光波長 範圍内的光線。所述第二螢羌粉2财為紅光螢光粉，其除 了受第一種光源211所發出的藍光光線激發而發出紅光外 ’還受到第二種光源212所發出的綠光光線的激發而發出 紅光。當只有第一種光源211開啟時，所述第一螢光粉 230與第二螢光粉240都會受藍光的激發而發光。其十， 第一螢光粉230將會發綠光而形成一個綠色的字母圖案a ’第二螢光粉240將會發紅光而形成一個紅色的字母圖案 B。當只有第二種光源212開啟時，由於第二種光源212發 出綠光’所述第一螢光粉230不會受第二種光源212的激 099138277 表單編號Α0101 第7頁/共13頁 0992066690-0 201220261 發而發光。所述第二螢光粉240將會受第二種光源21 2所 發出的綠光的激發而發出紅光。此時，在該LED顯示裝置 200上，只顯示一個紅色的字母圖案B。可見，藉由分別 控制第一種光源211與第二種光源212的開啟與關閉，在 該LED顯示裝置200上可以顯示不同的圖案。本實施例的 LED顯示裝置200同樣具有顯示色彩豐富的效果。同時， 由於第一螢光粉230與第二螢光粉240是藉由塗覆的方法 形成在導光板220的出光面上的。根據顯示内容的需要， 所述第一螢光粉230與第二螢光粉240可以有效地被去除 ，同時，將螢光粉塗覆成新的圖案，以適應顯示的需要 。所述的顯示内容可以是漢字、字母或者其任意組合， 亦可以是圖案、或者圖案與任意字元的組合。 [0020] 综上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 ，皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 [0021] 圖1係本發明第一實施例中的LED顯示裝置的結構示意圖 〇 [0022] 圖2係本發明第二實施例中的LED顯示裝置的結構示意圖 〇 【主要元件符號說明】 [0023] LED顯示裝置：100、200 099138277 表單編號A0101 第8頁/共13頁 0992066690-0 201220261 [0024] 光源：110、210 [0025] 第一種光源：211 [0026] 第二種光源：212 [0027] 基板：113、213 [0028] 導光板：120、220 [0029] 入光面：121、221 [0030] 出光面：122、222 [0031] 第一螢光粉：130、 230 [0032] 第二螢光粉：140、 240 [0033] 第三螢光粉：150 ❹ 0992066690-0 099138277 表單編號A0101 第9頁/共13頁[0012] In the embodiment, the light source 110 is a blue light emitting diode, and the light emitted by the light source has a wavelength of 435 nra to 475 nm. Correspondingly, the first phosphor powder 130 is a green phosphor powder which is excited by the blue light emitted from the light source 11 turns to emit light in the green wavelength range. The second phosphor powder 140 is a red phosphor powder, which is excited by the blue light emitted by the light source 11 而 to emit light in a red wavelength range. When the light source 11 〇 is turned on, the first fluorescent light The powder 130 will emit green light to form a green letter A, and the second phosphor 140 will emit red light to form a red letter B. It can be seen that in the LED display device 1 described above, since different patterns can be displayed by using different colors, the display color is richer and the display effect is better. Further, since the first phosphor powder 13 〇 and the second phosphor powder 14 〇 are formed on the light guide of the light guide plate 12 by a coating method. The first phosphor powder 13〇 and the second phosphor powder 14〇 can be effectively removed according to the need of the display content, and at the same time, the phosphor powder is coated into a new pattern to suit the needs of the display. The display content may be a Chinese character letter or any combination thereof, or may be a pattern, or a combination of a pattern and any character. If necessary, a layer-opaque substance f is applied at a place other than the coating area of the first-fluorescent powder 13〇 and the second phosphor powder 14〇, and the opaque substance may be used to remove the first-fluorescent powder 130 and the second fluorescent material. The light emitted from the area other than the 14 光 light is blocked, so that it does not affect the first glory 13 〇 and the second 099138277. Form No. A0101 Page 5 of 13 0992066690-0 201220261 [0014] [0017] [0017] The pattern displayed by the phosphor powder 140. The light source 11G may also be a light-emitting diode of ultraviolet light emitting light having a wavelength of less than 4 Å as needed. The first camping powder 1 30 and the color light or the outer line are excited to emit green light to form a green letter A. The phosphor powder 14 is excited by purple light or ultraviolet light to emit red light to form a red letter. B. The light-emitting surface of the light guide plate 12A in the above-mentioned LED display device 1A further includes a letter pattern C composed of the second phosphor powder 15〇, and a phosphor powder 150 is a yellow light-emitting powder. The light in the yellow wavelength range is emitted by the excitation of the blue light emitted by the light source 11A. When the light source 110 is turned on, a yellow letter c will also be displayed on the light guide plate. In the above embodiment, the first phosphor and the second phosphor are excited by light of the same wavelength to emit light. In fact, the first phosphor and the first phosphor may also be excited by light in different wavelength ranges to emit light. Referring to FIG. 2, a second embodiment of the present invention provides an LED display device 200' The display device 2 includes a light source 210 and a light guide plate 220. The light source 210 includes a first type of light source 211 and a second type of light source 212. The first type of light source 211 and the second type of light source 212 are spaced apart from each other on the substrate 21 3 . The wavelength of the light emitted by the first light source 211 is smaller than the wavelength of the light emitted by the second light source 212. In this embodiment, the first light source 211 and the second light source 21 2 are alternately arranged in a light emitting diode or a laser diode to form an array shape. The first light source 211 emits light in a blue wavelength range, and its light-emitting wavelength is 4351111] 099138277 Form No. A0101 Page 6 of 13 0992066690-0 201220261 to 475 nm. The second source 212 emits light in the green wavelength range with an emission wavelength of 500 nm to 560 nm. The opening and closing of the first light source 211 and the second light source 212 can be separately controlled so that the first light source 211 and the second light source 212 can be individually turned on or turned on separately. [0018] The light guide plate 220 has a light incident surface 221 and a light exit surface 222.光源 The light source 210 is disposed adjacent to the light incident surface 221, and the light emitted by the light source 210 is incident from the light incident surface 221 of the light guide plate 220, and then emitted from the light exit surface 222 of the light guide plate 220. The light guide plate 220 is coated with a letter pattern A composed of the first phosphor powder 230 and a letter pattern B composed of the second phosphor powder 240. Different from the first embodiment, the first phosphor powder 230 is excited by the light emitted by the first light source 211 to emit light of the first color. The second phosphor 240 is excited by light emitted by the second source 212 to emit light of a second color. [0019] In the present embodiment, the first phosphor powder 230 is a partial phosphor powder which is excited by the blue light emitted by the first light source 211 to emit light in a wavelength range of green light. The second fluorite powder is a red luminescent powder, which is excited by the blue light emitted by the first light source 211 to emit red light and is also subjected to the green light emitted by the second light source 212. Excite and emit red light. When only the first type of light source 211 is turned on, both the first phosphor powder 230 and the second phosphor powder 240 are excited by blue light to emit light. Tenth, the first phosphor powder 230 will emit green light to form a green letter pattern a'. The second phosphor powder 240 will emit red light to form a red letter pattern B. When only the second light source 212 is turned on, since the second light source 212 emits green light, the first fluorescent powder 230 is not excited by the second light source 212. 099138277 Form No. 1010101 Page 7 / Total 13 Page 0992066690 -0 201220261 Glows and shines. The second phosphor 240 will be excited by the green light emitted by the second source 21 2 to emit red light. At this time, on the LED display device 200, only one red letter pattern B is displayed. It can be seen that different patterns can be displayed on the LED display device 200 by controlling the opening and closing of the first light source 211 and the second light source 212, respectively. The LED display device 200 of the present embodiment also has an effect of displaying rich colors. At the same time, the first phosphor powder 230 and the second phosphor powder 240 are formed on the light-emitting surface of the light guide plate 220 by a coating method. The first phosphor powder 230 and the second phosphor powder 240 can be effectively removed according to the needs of the display content, and at the same time, the phosphor powder is coated into a new pattern to meet the needs of display. The display content may be Chinese characters, letters or any combination thereof, and may also be a pattern, or a combination of a pattern and any character. [0020] In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0021] FIG. 1 is a schematic structural view of an LED display device in a first embodiment of the present invention. [0022] FIG. 2 is a schematic structural view of an LED display device in a second embodiment of the present invention. Description of component symbols] [0023] LED display device: 100, 200 099138277 Form number A0101 Page 8 / Total 13 pages 0992066690-0 201220261 [0024] Light source: 110, 210 [0025] First light source: 211 [0026] Two kinds of light sources: 212 [0027] Substrate: 113, 213 [0028] Light guide plate: 120, 220 [0029] Light-incident surface: 121, 221 [0030] Light-emitting surface: 122, 222 [0031] First fluorescent powder: 130, 230 [0032] Second phosphor: 140, 240 [0033] Third phosphor: 150 ❹ 0992066690-0 099138277 Form number A0101 Page 9 of 13