TWI473307B - A planar light source light emitting device having a reflective layer - Google Patents
A planar light source light emitting device having a reflective layer Download PDFInfo
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- TWI473307B TWI473307B TW100137123A TW100137123A TWI473307B TW I473307 B TWI473307 B TW I473307B TW 100137123 A TW100137123 A TW 100137123A TW 100137123 A TW100137123 A TW 100137123A TW I473307 B TWI473307 B TW I473307B
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Description
本發明涉及一種能夠照明的平面光源，尤其是一種具有反射層的平面光源發光裝置。The invention relates to a planar light source capable of illumination, in particular to a planar light source illumination device having a reflective layer.
目前一般現有的平面光源，所投射出的光源場形為Lambertian，即朗伯光源，屬於平面均勻發光模式。平面光源所射出的光線的發散角大，容易造成發光效率不佳以及中心發光強度偏低的缺點，當應用於照明裝置，例如車尾燈時，需要採用很多顆OLED[有機發光二極體]組成平面光源，才能達到法規對於照明亮度的要求，但如此會大幅增加平面光源的製造成本。At present, the conventional planar light source has a light source field shape of Lambertian, that is, a Lambertian light source, which belongs to a plane uniform illumination mode. The divergence angle of the light emitted by the planar light source is large, which is likely to cause the disadvantages of poor luminous efficiency and low central luminous intensity. When applied to a lighting device, such as a taillight, it is required to use a plurality of OLEDs [organic light-emitting diodes]. Planar light sources can meet the requirements of regulations for lighting brightness, but this will greatly increase the manufacturing cost of planar light sources.
有些平面光源上會增設一增亮膜來匯聚光線，使光線集中並修飾光型，但是其增亮膜所能達到聚光的效果有限，仍有待改善。Some flat light sources will add a brightness enhancement film to concentrate the light, so that the light concentrates and modifies the light type, but the brightness enhancement effect of the brightness enhancement film is limited and needs to be improved.
因此，現有技術的使用平面光源的照明裝置存有發光效率不佳、中心發光強度偏低及增加製造成本的缺點，實有改善的必要。Therefore, the prior art lighting device using a planar light source has the disadvantages of poor luminous efficiency, low central luminous intensity, and increased manufacturing cost, which is necessary for improvement.
為解決現有技術的使用平面光源的照明裝置有關於發光效率不佳、中心發光強度偏低及增加製造成本的不足與限制，本發明的目的在於提供一種具有反射層的平面光源發光裝置，其反射層固設於平面光源及增亮膜之間，反射層呈縱橫交錯狀並設有複數個相互平行的縱向反射條及複數個相互平行的橫向反射條，增亮膜的出射面設有複數個呈矩陣排列的自由曲面區，自由曲面區呈凸弧狀，於自由曲面區鄰接處形成複數個縱線及複數個橫線，複數個縱線分別與複數個縱向反射條對齊，複數個橫線分別與複數個橫向反射條對齊；藉此，利用反射層確保光線皆被射往自由曲面區的中間位置，能夠有效地將光線聚焦、提昇發光效率、增加中心發光強度並減少平面光源的OLED使用顆數，進而降低製造成本及平面光源的面積，實用性極佳。In order to solve the prior art illuminating device using a planar light source, the illuminating efficiency is poor, the central illuminating intensity is low, and the manufacturing cost is increased. The object of the present invention is to provide a planar light source illuminating device having a reflective layer, the reflection thereof The layer is fixed between the planar light source and the brightness enhancement film, and the reflection layer is vertically and horizontally staggered and is provided with a plurality of mutually parallel longitudinal reflection strips and a plurality of mutually parallel lateral reflection strips, and the exit surface of the brightness enhancement film is provided with a plurality of a free-form surface area arranged in a matrix, the free-form surface area is convex arc-shaped, forming a plurality of vertical lines and a plurality of horizontal lines adjacent to the free-form surface area, and the plurality of vertical lines are respectively aligned with the plurality of longitudinal reflection strips, and the plurality of horizontal lines are respectively Aligning with a plurality of lateral reflection strips respectively; thereby, the reflective layer is used to ensure that the light is directed to the middle of the free-form surface region, which can effectively focus the light, improve the luminous efficiency, increase the central illumination intensity, and reduce the OLED use of the planar light source. The number, which in turn reduces the manufacturing cost and the area of the planar light source, is extremely practical.
本發明所運用的技術手段在於提供一種具有反射層的平面光源發光裝置，依序包括：一平面光源，其設有一發光面；一反射層，其抵靠於該發光面，該反射層呈縱橫交錯狀並設有複數個相互平行的縱向反射條及複數個相互平行的橫向反射條；以及一增亮膜，其能夠透光並設有一與該反射層固設且呈平坦狀的結合面及一相背於該結合面的出射面，該出射面包括複數個呈矩陣排列的自由曲面區，各自由曲面區呈凸弧狀，於該複數個自由曲面區鄰接處形成複數個縱線及複數個橫線，該複數個縱線分別與該複數個縱向反射條對齊，該複數個橫線分別與該複數個橫向反射條對齊。The technical means used in the present invention is to provide a planar light source illuminating device having a reflective layer, which comprises: a planar light source provided with a light emitting surface; a reflective layer abutting against the light emitting surface, the reflective layer being vertically and horizontally a plurality of mutually parallel longitudinal reflection strips and a plurality of mutually parallel lateral reflection strips; and a brightness enhancement film capable of transmitting light and having a flat surface fixed to the reflective layer and An exit surface opposite to the bonding surface, the exit surface comprising a plurality of free-form surface regions arranged in a matrix, each of which is convexly curved by a curved surface region, and a plurality of vertical lines and plural numbers are formed adjacent to the plurality of free curved surface regions a plurality of horizontal lines respectively aligned with the plurality of longitudinal reflective strips, the plurality of horizontal lines being respectively aligned with the plurality of lateral reflective strips.
所述的具有反射層的平面光源發光裝置，其中，各縱向反射條與各橫向反射條垂直。The planar light source illuminating device with a reflective layer, wherein each longitudinal reflective strip is perpendicular to each lateral reflective strip.
所述的具有反射層的平面光源發光裝置，其中各橫向反射條的寬度等於各縱向反射條的寬度。The planar light source illuminating device having a reflective layer, wherein each lateral reflective strip has a width equal to a width of each longitudinal reflective strip.
所述的具有反射層的平面光源發光裝置，其中於該複數個橫向反射條之間間隔形成複數個空隙，各空隙的寬度為各自由曲面區的寬度的二分之一。The planar light source illuminating device with a reflective layer, wherein a plurality of gaps are formed between the plurality of lateral reflective strips, and the width of each of the gaps is one-half of the width of each of the curved regions.
所述的具有反射層的平面光源發光裝置，其中，該反射層以鍍膜方式結合於該結合面。The planar light source illuminating device with a reflective layer, wherein the reflective layer is bonded to the bonding surface by a coating method.
所述的具有反射層的平面光源發光裝置，其中，該增亮膜由透明樹脂製成。The planar light source illuminating device having a reflective layer, wherein the brightness enhancing film is made of a transparent resin.
所述的具有反射層的平面光源發光裝置，其中，該增亮膜呈可彎折狀態。The planar light source illuminating device with a reflective layer, wherein the brightness enhancing film is in a bendable state.
本發明所提供的具有反射層的平面光源發光裝置，可以獲得的具體效益及功效增進至少包括：The specific benefits and enhancements that can be obtained by the planar light source illuminating device with a reflective layer provided by the present invention include at least:
1.有效地將光線聚焦：本發明利用反射層確保光線皆被射往自由曲面區的中間位置，能夠有效地將光線聚焦、提昇發光效率、增加中心發光強度並減少平面光源的OLED使用顆數，進而降低製造成本及平面光源的面積，實用性極佳。1. Effectively focusing the light: The present invention utilizes the reflective layer to ensure that the light is directed to the middle of the free-form surface region, which can effectively focus the light, improve the luminous efficiency, increase the central luminous intensity, and reduce the number of OLEDs used in the planar light source. In addition, the manufacturing cost and the area of the planar light source are reduced, and the utility is excellent.
2.組裝方便：本發明並非改變現有技術平面光源的內部結構，而是在預先在增亮膜鍍上反射層，再將鍍好的增亮膜黏貼於平面光源。鍍上反射層的增亮膜容易製造，平面光源與反射層並沒有對齊定位的問題，所以本發明組裝十分方便。2. Convenient assembly: The present invention does not change the internal structure of the prior art planar light source, but instead deposits a reflective layer on the brightness enhancement film in advance, and then adheres the plated brightness enhancement film to the planar light source. The brightness enhancement film coated with the reflective layer is easy to manufacture, and the planar light source and the reflective layer are not aligned and positioned, so the assembly of the present invention is very convenient.
為能詳細瞭解本發明的技術特徵及實用功效，並可依照說明書的內容來實施，茲進一步以如圖式所示的較佳實施例，詳細說明如后：本發明所提供的一種具有反射層的平面光源發光裝置的較佳實施例，如圖1所示，由下而上包括：一平面光源10、一反射層20及一增亮膜30等元件，其中：如圖1至圖3所示，該平面光源10為一可彎折的薄片並設有一發光面11及一相背於該發光面11的反射面12，較佳地，該平面光源10為複數個有機發光二極體(OLED,Organic Light Emitting Diode)並排而成。In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the contents of the specification, the present invention will be further described in detail with reference to the preferred embodiments as illustrated in the accompanying drawings. A preferred embodiment of the planar light source illuminating device, as shown in FIG. 1, includes a planar light source 10, a reflective layer 20, and a brightness enhancing film 30, etc., wherein: FIG. 1 to FIG. 3 The planar light source 10 is a bendable sheet and is provided with a light emitting surface 11 and a reflective surface 12 opposite to the light emitting surface 11. Preferably, the planar light source 10 is a plurality of organic light emitting diodes ( OLED, Organic Light Emitting Diode) is side by side.
如圖1至圖3所示，該反射層20抵靠於該發光面11，該反射層20呈縱橫交錯狀並設有複數個相互平行的縱向反射條21及複數個相互平行的橫向反射條22，各縱向反射條21與各橫向反射條22垂直，各橫向反射條22的寬度與各縱向反射條21的寬度相同。As shown in FIG. 1 to FIG. 3, the reflective layer 20 is abutted against the light-emitting surface 11. The reflective layer 20 is vertically criss-crossed and provided with a plurality of mutually parallel longitudinal reflective strips 21 and a plurality of mutually parallel lateral reflective strips. 22, each of the longitudinal reflection strips 21 is perpendicular to each of the lateral reflection strips 22, and the width of each of the lateral reflection strips 22 is the same as the width of each of the longitudinal reflection strips 21.
如圖2至圖4所示，該增亮膜30由可透光的透明樹脂製成並呈可彎曲狀態，該增亮膜30設有一與該反射層20固設且呈平坦狀的結合面31及一相背於該結合面31的出射面32，該出射面32包括複數個呈矩陣排列且結構相同的自由曲面區321，各自由曲面區321呈凸弧狀且水平截面形狀為正方形，於該複數個自由曲面區321鄰接處形成複數個縱線322及複數個橫線323，該複數個縱線322分別與該複數個縱向反射條21對齊，該複數個橫線323分別與該複數個橫向反射條22對齊。As shown in FIG. 2 to FIG. 4, the brightness enhancement film 30 is made of a light transmissive transparent resin and is in a bendable state. The brightness enhancement film 30 is provided with a bonding surface fixed to the reflective layer 20 and having a flat shape. 31 and an exit surface 32 opposite to the bonding surface 31. The exit surface 32 includes a plurality of free-form surface regions 321 arranged in a matrix and having the same structure, each of which is convexly curved by the curved surface region 321 and has a horizontal cross-sectional shape. A plurality of vertical lines 322 and a plurality of horizontal lines 323 are formed adjacent to the plurality of free curved surface regions 321 , and the plurality of vertical lines 322 are respectively aligned with the plurality of longitudinal reflective strips 21 , and the plurality of horizontal lines 323 are respectively associated with the plurality of horizontal lines 323 The lateral reflective strips 22 are aligned.
較佳地，該反射層20以鍍膜方式結合於該結合面31。Preferably, the reflective layer 20 is bonded to the bonding surface 31 in a coating manner.
如圖5所示，為本發明較佳實施例反射層20反射時的光路徑示意圖，其中，將各自由曲面區321的寬度定義為線段D1，而橫向反射條22的寬度定義為線段D2，橫向反射條22之間的空隙G的寬度定義為線段D3，較佳地，線段D1的長度約為線段D3的兩倍，所以空隙G約位於自由曲面區321的中間位置；於反射時，平面光源10射出的光線被橫向反射條22反射、返回反射面12並再次射往發光面11，直到穿過反射層20的橫向反射條22之間的空隙G，最後射往增亮膜30；藉由反射層20，可以確保光線皆被射往自由曲面區321的中間位置，使得最後的發散角不會過大，而達到匯聚光線的功效。As shown in FIG. 5, a schematic diagram of a light path when the reflective layer 20 is reflected according to a preferred embodiment of the present invention, wherein each of the width of the curved surface region 321 is defined as a line segment D1, and the width of the horizontal reflective strip 22 is defined as a line segment D2. The width of the gap G between the lateral reflection strips 22 is defined as a line segment D3. Preferably, the length of the line segment D1 is about twice that of the line segment D3, so the gap G is located approximately at the middle of the free-form surface region 321; The light emitted by the light source 10 is reflected by the lateral reflection strips 22, returned to the reflective surface 12, and is again incident on the light-emitting surface 11 until the gap G between the lateral reflection strips 22 passing through the reflective layer 20 is finally incident on the brightness enhancement film 30; By the reflective layer 20, it is ensured that the light is directed to the middle of the free-form surface area 321, so that the final divergence angle is not too large, and the effect of converging light is achieved.
本發明的反射層20只要呈交錯縱橫狀並對齊增亮膜30的橫線及縱線，就可以達到對平面光源10聚光的效果，本發明對於反射層20的縱向反射條及橫向反射條的寬度並不作特定的限制。The reflective layer 20 of the present invention can achieve the effect of concentrating the planar light source 10 as long as it is staggered in the vertical and horizontal direction and aligned with the horizontal and vertical lines of the brightness enhancing film 30. The longitudinal reflective strip and the lateral reflective strip of the reflective layer 20 of the present invention. The width is not specifically limited.
另外補充說明，在設計時，將增亮膜30的折射率、空隙G的寬度、增亮膜30的厚度以及法規所規定的光型…等作為設計參數，並利用司乃耳定律(Snell’s Law)推導，能夠適當地設計自由曲面區321的曲率變化。In addition, at the time of design, the refractive index of the brightness enhancement film 30, the width of the gap G, the thickness of the brightness enhancement film 30, and the light type specified by the regulations are used as design parameters, and Snell's Law is utilized. It is deduced that the curvature variation of the free curved surface region 321 can be appropriately designed.
藉由本發明的增亮膜30及反射層20，能使平面光源10射出光線形成一狹窄的光型，符合車尾燈法規的光型要求。With the brightness enhancement film 30 and the reflective layer 20 of the present invention, the planar light source 10 can emit light to form a narrow light pattern, which meets the light type requirements of the taillight regulations.
請進一步參看圖6，橫軸是視角[Viewing angle]，單位為度[Degree]，縱軸是發光強度[Luminous Intensity]，單位為[cd]；虛線為未使用增亮膜30及反射層20的發光強度分佈，實線為使用使用增亮膜30及反射層20後的發光強度分佈；未使用增亮膜30及反射層20的中心發光強度大約為17cd，而使用增亮膜30及反射層20的中心發光強度大約為33.02cd，約提升了一倍的亮度。Please refer to FIG. 6 further, the horizontal axis is the viewing angle [Viewing angle], the unit is degree [Degree], the vertical axis is the luminous intensity [Luminous Intensity], the unit is [cd]; the broken line is the unused brightness enhancing film 30 and the reflective layer 20 The luminous intensity distribution, the solid line is the luminous intensity distribution after using the brightness enhancing film 30 and the reflective layer 20; the central luminous intensity of the non-brightening film 30 and the reflective layer 20 is about 17 cd, and the brightness enhancement film 30 and reflection are used. The central luminescence intensity of layer 20 is approximately 33.02 cd, which approximately doubles the brightness.
請參看圖7及圖8，圖7為本發明發光強度分布圖，圖8為現有技術未使用增亮膜30及反射層20的發光強度分布圖。圖7的橫軸是水平角[Horizontal angle]，單位為度[degree]，縱軸是垂直角[Vertical angle]，單位為度[degree]。可以很明顯地看出，使用本發明的增亮膜30及反射層20後的光線匯聚，光形為中心集中。Please refer to FIG. 7 and FIG. 8. FIG. 7 is a luminous intensity distribution diagram of the present invention, and FIG. 8 is a luminous intensity distribution diagram of the prior art without using the brightness enhancing film 30 and the reflective layer 20. The horizontal axis of Fig. 7 is a horizontal angle [Horizontal angle], the unit is degree [degree], and the vertical axis is a vertical angle [Vertical angle], and the unit is degree [degree]. It can be clearly seen that the light rays after the use of the brightness enhancement film 30 of the present invention and the reflective layer 20 are concentrated, and the light shape is concentrated at the center.
另外，本發明的具有反射層的平面光源發光裝置是實施於車尾燈，而本發明也可以實施於檯燈、車側燈等而達到聚光的效果，本發明對於實施的領域及用途均不作特定的限制。Further, the planar light source light-emitting device having the reflective layer of the present invention is implemented in a taillight, and the present invention can also be implemented in a desk lamp, a vehicle side lamp, or the like to achieve the effect of collecting light, and the present invention is not specific to the field of application and use. limits.
惟以上所述者，僅為本發明的較佳實施例而已，當不能以此限定本發明實施的範圍，及大凡依本發明申請專利範圍及說明書內容所作的簡單的等效變化與修飾，皆應仍屬本發明專利涵蓋的範圍內。However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the simple equivalent changes and modifications made by the scope of the present invention and the contents of the specification are all It should remain within the scope of the invention patent.
10．．．平面光源10. . . Planar light source
11．．．發光面11. . . Luminous surface
12．．．反射面12. . . Reflective surface
20．．．反射層20. . . Reflective layer
21．．．縱向反射條twenty one. . . Longitudinal reflection strip
22．．．橫向反射條twenty two. . . Transverse reflection strip
30．．．增亮膜30. . . Brightening film
31．．．結合面31. . . Joint surface
32．．．出射面32. . . Exit surface
321．．．自由曲面區321. . . Free surface area
322．．．縱線322. . . Vertical line
323．．．橫線323. . . Horizontal line
D1．．．自由曲面區的寬度D1. . . Freeform surface width
D2．．．橫向反射條的寬度D2. . . Width of the transverse reflection strip
D3．．．空隙的寬度D3. . . Width of the gap
G．．．橫向反射條之間的空隙G. . . Void between transverse reflection strips
圖1是本發明較佳實施例的立體外觀圖。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a preferred embodiment of the present invention.
圖2是本發明較佳實施例的立體分解圖。Figure 2 is an exploded perspective view of a preferred embodiment of the present invention.
圖3是本發明較佳實施例的剖面圖。Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.
圖4是本發明較佳實施例增亮膜的俯視圖。Figure 4 is a top plan view of a brightness enhancing film in accordance with a preferred embodiment of the present invention.
圖5是本發明較佳實施例反射層反射時的光路徑示意圖。Figure 5 is a schematic illustration of the optical path of a reflective layer in accordance with a preferred embodiment of the present invention.
圖6是本發明較佳實施例的視角-發光強度的曲線圖。Figure 6 is a graph of viewing angle - luminous intensity in accordance with a preferred embodiment of the present invention.
圖7是本發明較佳實施例的發光強度分布圖。Figure 7 is a graph showing the luminous intensity distribution of a preferred embodiment of the present invention.
圖8是現有技術平面光源照明裝置的發光強度分布圖。Figure 8 is a diagram showing the luminous intensity distribution of a prior art planar light source illumination device.
10．．．平面光源10. . . Planar light source
20．．．反射層20. . . Reflective layer
30．．．增亮膜30. . . Brightening film
Claims (9)
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| TW100137123A TWI473307B (en) | 2011-10-13 | 2011-10-13 | A planar light source light emitting device having a reflective layer |
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| TW100137123A TWI473307B (en) | 2011-10-13 | 2011-10-13 | A planar light source light emitting device having a reflective layer |
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| Publication Number | Publication Date |
|---|---|
| TW201316568A TW201316568A (en) | 2013-04-16 |
| TWI473307B true TWI473307B (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW100137123A TWI473307B (en) | 2011-10-13 | 2011-10-13 | A planar light source light emitting device having a reflective layer |
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| TW (1) | TWI473307B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1583159A2 (en) * | 2004-03-29 | 2005-10-05 | Stanley Electric Co., Ltd. | Semiconductor light emitting device capable of suppressing silver migration of reflection film made of silver |
| TW200905307A (en) * | 2007-07-19 | 2009-02-01 | Jen-Wei Mi | Apparatus for improving the brightness uniformity of direct-type LCD backlight |
| TW200916863A (en) * | 2007-10-12 | 2009-04-16 | Ind Tech Res Inst | Light guide plate and light emitting apparatus |
-
2011
- 2011-10-13 TW TW100137123A patent/TWI473307B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1583159A2 (en) * | 2004-03-29 | 2005-10-05 | Stanley Electric Co., Ltd. | Semiconductor light emitting device capable of suppressing silver migration of reflection film made of silver |
| TW200905307A (en) * | 2007-07-19 | 2009-02-01 | Jen-Wei Mi | Apparatus for improving the brightness uniformity of direct-type LCD backlight |
| TW200916863A (en) * | 2007-10-12 | 2009-04-16 | Ind Tech Res Inst | Light guide plate and light emitting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201316568A (en) | 2013-04-16 |
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