TWI425458B - Led display device - Google Patents
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- TWI425458B TWI425458B TW99138277A TW99138277A TWI425458B TW I425458 B TWI425458 B TW I425458B TW 99138277 A TW99138277 A TW 99138277A TW 99138277 A TW99138277 A TW 99138277A TW I425458 B TWI425458 B TW I425458B
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Description
本發明涉及一種LED顯示裝置。 The present invention relates to an LED display device.
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。 A Light Emitting Diode (LED) is a semiconductor component 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.
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內容。然而,在這種廣告面板中,由於需要在導光板上製作微結構,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。 Light-emitting diodes have gradually replaced cold cathode fluorescent lamps as light sources for various display panels due to their advantages of good 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 by the light source is emitted from the defect portion. The above defects constitute a number of patterns to constitute the content to be displayed. However, in such an advertising panel, since it is necessary to fabricate a microstructure on the light guide plate, it is difficult to manufacture. 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.
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。 In view of this, it is necessary to provide an LED display device having a rich display color.
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。所述導光板的出光面設置有由第一螢光粉塗布而成的圖案與由第二螢光粉塗布而成的圖案。所述第一螢光粉受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。 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 from the light guide plate The light incident surface is incident and exits from the light exit surface of the light guide plate. The light-emitting surface of the light guide plate is provided with a pattern coated with the first phosphor powder and a pattern coated with the second phosphor powder. 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.
藉由在導光板的出光面設置由第一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。 A pattern coated with the first phosphor powder and a pattern coated with the second phosphor powder 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 by the display device is relatively rich.
下面參照附圖,結合具體實施例對本發明作進一步的描述。 The invention will now be further described with reference to the specific embodiments thereof with reference to the accompanying drawings.
100、200‧‧‧LED顯示裝置 100,200‧‧‧LED display device
110、210‧‧‧光源 110, 210‧‧‧ Light source
211‧‧‧第一種光源 211‧‧‧first light source
212‧‧‧第二種光源 212‧‧‧Second light source
113、213‧‧‧基板 113, 213‧‧‧ substrate
120、220‧‧‧導光板 120, 220‧‧‧Light guide plate
121、221‧‧‧入光面 121, 221‧‧‧ into the glossy surface
122、222‧‧‧出光面 122, 222‧‧‧ shine surface
130、230‧‧‧第一螢光粉 130, 230‧‧‧ first fluorescent powder
140、240‧‧‧第二螢光粉 140, 240‧‧‧second phosphor powder
150‧‧‧第三螢光粉 150‧‧‧ Third Fluorescent Powder
圖1係本發明第一實施例中的LED顯示裝置的結構示意圖。 1 is a schematic structural view of an LED display device in a first embodiment of the present invention.
圖2係本發明第二實施例中的LED顯示裝置的結構示意圖。 2 is a schematic structural view of an LED display device in a second embodiment of the present invention.
如圖1所示,一種LED顯示裝置100,包括光源110與導光板120。 As shown in FIG. 1 , an LED display device 100 includes a light source 110 and a light guide plate 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。 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.
所述導光板120由透明材料製成,其製作材料包括聚甲基丙烯酸甲酯(PMMA)、聚碳酸酯(PC)、玻璃(glass)與環氧樹脂(epoxy)等。所述導光板120具有一個入光面121與一個出光面122。所述光源110鄰近入光面121設置,光源110所發出的光從導光板120的入光面121入射,然後從導光板120的出光面122出射。導光板120上塗覆有由第一螢光粉130組成的字母圖案A與由第二螢 光粉140組成的字母圖案B。所述第一螢光粉130受光源110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110發出光線的激發而發出第二種顏色的光線。 The light guide plate 120 is made of a transparent material, and the material thereof includes polymethyl methacrylate (PMMA), polycarbonate (PC), glass, epoxy, and the like. The light guide plate 120 has a light incident surface 121 and a light exit surface 122. The light source 110 is disposed adjacent to the light incident surface 121. The light emitted by the light source 110 is incident from the light incident surface 121 of the light guide plate 120, and then emitted from the light exit surface 122 of the light guide plate 120. The light guide plate 120 is coated with a letter pattern A composed of the first phosphor powder 130 and a second firefly The letter pattern B composed of the light powder 140. The first phosphor powder 130 is excited by the light emitted by the light source 110 to emit light of a first color, and the second phosphor powder 140 is excited by the light emitted by the light source 110 to emit light of a second color.
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範圍為435nm到475nm。相應地,所述第一螢光粉130為綠光螢光粉,其受光源110所發出的藍色光的激發而發出綠光波長範圍內的光線。所述第二螢光粉140為紅光螢光粉,其受光源110所發出的藍色光的激發而發出紅光波長範圍內的光線。當光源110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100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。另外,由於第一螢光粉130與第二螢光粉140是藉由塗覆的方法形成在導光板120的出光面上的。根據顯示內容的需要,所述第一螢光粉130與第二螢光粉140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。所述的顯示內容可以是漢字、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。 In this embodiment, the light source 110 is a blue light emitting diode that emits light in a wavelength range of 435 nm to 475 nm. Correspondingly, the first phosphor powder 130 is a green phosphor powder that is excited by the blue light emitted by the light source 110 to emit light in a wavelength range of green light. The second phosphor powder 140 is a red phosphor powder that is excited by the blue light emitted by the light source 110 to emit light in a red wavelength range. When the light source 110 is turned on, the first phosphor powder 130 will emit green light to form a green letter A, and the second phosphor powder 140 will emit red light to form a red letter B. It can be seen that in the LED display device 100 described above, since different patterns can be displayed by using different colors, the display color is richer and the display effect is better. In addition, since the first phosphor powder 130 and the second phosphor powder 140 are formed on the light-emitting surface of the light guide plate 120 by a coating method. The first phosphor powder 130 and the second phosphor powder 140 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, or may be a pattern, or a combination of a pattern and any character.
根據需要,在除第一螢光粉130與第二螢光粉140的塗布區域以外的地方塗覆一層不透明物質,該不透明物質可以對除第一螢光粉130與第二螢光粉140以外區域所出射的光線進行遮擋,使其不會影響到第一螢光粉130與第二螢光粉140所顯示的圖案。 If necessary, an opaque substance is coated on the areas other than the coating areas of the first phosphor powder 130 and the second phosphor powder 140, and the opaque substance may be used in addition to the first phosphor powder 130 and the second phosphor powder 140. The light emitted from the area is shielded so as not to affect the pattern displayed by the first phosphor powder 130 and the second phosphor powder 140.
根據需要,所述光源110亦可以採用發紫色光或紫外線的發光二極體,其發光的波長小於400nm。所述第一螢光粉130受紫色光或紫外線的激發而發出綠光而形成綠色的字母A,第二螢光粉140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。 The light source 110 may also be a light-emitting diode that emits purple light or ultraviolet light, and has a light-emitting wavelength of less than 400 nm. The first phosphor powder 130 is excited by purple light or ultraviolet light to emit green light to form a green letter A, and the second phosphor powder 140 is subjected to The purple light or ultraviolet light excites and emits red light to form a red letter B.
根據需要,在上述的LED顯示裝置100中,導光板120的出光面還包括塗覆有由第三螢光粉150組成的字母圖案C。第三螢光粉150為黃光螢光粉,其受光源110所發出的藍色光的激發而發出黃光波長範圍內的光線。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。 In the LED display device 100 described above, the light-emitting surface of the light guide plate 120 further includes a letter pattern C composed of the third phosphor powder 150. The third phosphor 15 is a yellow phosphor that is excited by the blue light emitted by the light source 110 to emit light in a yellow wavelength range. When the light source 110 is turned on, a yellow letter C will also be displayed on the light guide plate.
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二螢光粉亦可以由不同波長範圍內的光線激發而發光。 In the above embodiment, the first phosphor powder and the second phosphor powder are excited by light of the same wavelength to emit light. In fact, the first phosphor and the second phosphor may also be excited by light in different wavelength ranges to emit light.
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200包括光源210與導光板220。 Referring to FIG. 2 , a second embodiment of the present invention provides an LED display device 200 . The LED display device 200 includes a light source 210 and a light guide plate 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213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212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發出藍色波長範圍內的光線,其發光波長為435nm到475nm。所述第二種光源212發出綠色波長範圍內的光線,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。 The light source 210 includes a first type of light source 211 and a second type of light source 212. The first light source 211 and the second light source 212 are spaced apart from each other on the substrate 213. 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 212 are light emitting diodes or laser diodes, and the two are staggered to form an array shape. The first type of light source 211 emits light in a blue wavelength range having an emission wavelength of 435 nm 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 separately turned on or turned on separately.
所述導光板220具有一個入光面221與一個出光面222。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。 The light guide plate 220 has a light incident surface 221 and a light exit surface 222. The light source 210 is disposed adjacent to the light incident surface 221, and the light emitted by the light source 210 is incident on the light from the light guide plate 220. The face 221 is incident and then exits from the light exit face 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 the light emitted by the second source 212 to emit light of a second color.
在本實施例中,所述第一螢光粉230為綠光螢光粉,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內的光線。所述第二螢光粉240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。其中,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的激發而發光。所述第二螢光粉240將會受第二種光源212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。根據顯示內容的需要,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。所述的顯示內容可以是漢字、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。 In the embodiment, the first phosphor powder 230 is a green phosphor, which is excited by the blue light emitted by the first light source 211 to emit light in a green wavelength range. The second phosphor powder 240 is a red phosphor powder, which is excited by the blue light emitted by the first light source 211 to emit red light, and is also excited by the green light emitted by the second light source 212. And it glows red. 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. Wherein, the first phosphor powder 230 will emit green light to form a green letter pattern A, and 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 phosphor powder 230 is not excited by the second light source 212. The second phosphor 240 will be excited by the green light emitted by the second source 212 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 modes 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 may also be a pattern, or a combination of a pattern and any character.
綜上所述,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內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application 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.
100‧‧‧LED顯示裝置 100‧‧‧LED display device
110‧‧‧光源 110‧‧‧Light source
113‧‧‧基板 113‧‧‧Substrate
120‧‧‧導光板 120‧‧‧Light guide
121‧‧‧入光面 121‧‧‧Into the glossy surface
122‧‧‧出光面 122‧‧‧Glossy surface
130‧‧‧第一螢光粉 130‧‧‧First Fluorescent Powder
140‧‧‧第二螢光粉 140‧‧‧Second Fluorescent Powder
150‧‧‧第三螢光粉 150‧‧‧ Third Fluorescent Powder
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TW201220261A (en) | 2012-05-16 |
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