200945300 六、發明說明： 【發明所屬之技術領域】 本發明係關於具有整合光感應器之照明裝置之領域，且 係尤其關於多LED應用之色彩控制。 【先前技術】200945300 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to the field of illumination devices having integrated light sensors, and more particularly to color control for multi-LED applications. [Prior Art]
當固態照明正解決照明應用時，在新興行業中，多lED 應用之精確色彩控制作為一關鍵差異而討論。但是，用於 多LED燈之精確色彩控制的若干概念包括經由一些光學感 應器的光學回授以監控瞬時光輸出。一系列概念包括在燈 中所包括之色彩串的通量感應及色點監控。最後，感應器 系統應能夠追蹤每一單一光源（即，每一單一 LEd)的貢 獻。 在迄今所討論的解決方案中，一些依賴於整合led/感應 器封裝，其使用略微漫射的陶瓷光學元件將來自LED之光 耦合至感應器。可使用該陶瓷光學元件之特殊金屬化以便 抑制環境光到達感應器。以此方式，感應器僅感知來自相 同封裝之其相鄰LED的光。 在先前技術配置中，校準工作量係相當大的，從而使得 在應用中實施通量回授既複雜又耗時。 【發明内容】 本發明之一目的係提供一種易於調適並可輕鬆校準之照 裝置其具有一發光裝置與一光感應器，該光感應器係 用於藉由線上監控光輸出來進行光學回授。 此目的係藉由一種照明裝置來實現，該照明裝置具有— 137990.doc 200945300 發光裝置與一光感應器，該光感應器係用於藉由線上監控 光輸出來進行光學回授，其中該發光裝置及該光感應器係 彼此相鄰配置並係由用於耦合來自該發光裝置之發射光之 一部分至該光感應器的一光學耦合裝置至少部分地覆蓋， 且其中一光學衰減器係設於該光學耦合裝置與該光感應器 之間。 使用此一配置，可以調整該光感應器之光信號使得其僅 橫跨一預定範圍。尤其係，依據本發明之一較佳具體實施 例’該光學哀減器係調適用於相對於在該發光裝置之一預 疋電流範圍内（較佳的係在該發光裝置之完整驅動電流範 圍内）所偵測之光強度提供該光感應器之一線性光信號。 據此，本發明提供在以標稱或最大電流來驅動該發光裝置 之前避免該光感應器飽和的可能性。 一般而言，可使用不同類型的發光裝置。但是，依據本 發明之一較佳具體實施例，該發光裝置包含多個LED。 此外，該光學耦合裝置可由具有不同光學特徵的不同材 料製成《但是，依據本發明之一較佳具體實施例，該光學 耦合裝置係光學漫射的。此外，依據本發明之一較佳具體 實施例’該光學麵合裝置係由一冑竟材料製成，較佳的係 磷光體陶瓷材料。此類材料可設計以在較廣溫度範圍及一 較長壽命内波長變得非常穩定。該磷光體陶变之波長穩定 性提供經由純通量回授之色彩控制的可能性。 可以不同方式來設計在該光學麵合襄置及該光感應器之 間的光學衰減器。但是，依據本發明之一較佳具體實施 137990.doc 200945300 例，該光學衰減器包含一中性密度濾波器、一阻尼層或/ 及具有一孔的一遮罩。此外，依據本發明之一較佳具體實 施：’該光學衰減器包含一金屬[而且，較佳的係該光 學衰減器係叹於該感應器自身上或在面向該感應器的該光 學搞合裝置之侧上。 一般而言，該光學耦合裝置不必具備任何額外層。但 是，依據本發明冬一較佳具體實施例，該光學耦合裝置係 在覆蓋该光感應器的至少區域中由一反射層所覆蓋，較佳 的係完全反射層。以此方式’防止該感應器感知非源自該 照明裝置自身之發光裝置的環境光。此外，較佳的係該反 射層包含一反射金屬I。尤其係、，此反射金屬層較佳的係 比用於該光學耦合裝置與該光感應器之間的該光學衰減器 之一金屬層更厚。 此外，本發明提供新封裝機會之可能性，如下列所提 出： 依據本發明之一較佳具體實施例，該反射金屬層係連續 地設於背對該光感應器的該光學耦合裝置之上側上且連接 該上側與經由該光學衰減器直接接觸該光感應器的該光學 耦口裝置之下侧的該侧係由一金屬層所組成，其中用作該 光學衰減器的該金屬層電接觸該光感應器之頂部電接點及 該反射金屬層使得該光感應器之頂部電接點可經由該光學 耦合裝置之上側上的反射層來電連接。此允許使用市售光 電二極體’其一般需要接合頂部接點。 或者，依據本發明之一較佳具體實施例，該光感應器包 137990.doc 200945300 含面向該光學衰減器的一頂部電接點，其中該項部電接點 係電連接至在由該光學耦合裝置所覆蓋之區域外的一接合 墊以此方式’電接觸該光感應器不會干擾該光學衰減器 之功能。 依據本發明之照明裝置較佳的係用於具有通量回授色彩 控制之多LED應用，諸如未來固態，尤其涉及 -商店照明系統， -住宅照明系統， -重點照明系統， -聚光照明系統， -劇院照明系統， -光纖應用系統， -投影系統， -自我照明顯示系統， -像素化顯示系統， -分段顯示系統， -警告標誌系統， -醫學照明應用系統， -指不燈標誌、糸統， -裝飾照明系統， -可攜式系統，以及 -汽車應用。 【實施方式】 從圖1及2可看到用於依據本發明之一第一較佳具體實施 137990.doc 200945300 例之-照明裝置之—配置。依據本發明之第—較佳具體實 施例之照明裝置包含一發光裝置1，其由一 LED 2製成；及 光感應器3’其用於藉由線上監控該發光裝置丄之光輸出 來進行光學回授。該發光裝置1及其LED係使料接連接 物13來焊接至-LED晶片4上，而該光感應器㈣配置在一 感應器曰曰片5上。LED晶片4及感應器晶片5係彼此相鄰地 配置在一第二子基板6上。該第二子基板6為該發光裝置1 以及該光感應器3之底部電極提供電接觸，該底部電極對 於用作光感應器3之大多數市售光電二極體而言通常為陰 極。 該光感應器3之感應區域係靠近該LED晶片4之邊緣而定 位以便儘可能地靠近該發光裝置丨之LED 2。為了將該發光 裝置1所發射之光之一部分耦合至該光感應器3，提供由一 磷光體陶瓷所製成的一光學耦合裝置7 ^藉由靠近該led 晶片4之邊緣定位該光感應器3之敏感區域，可將延伸至該 發光裝置1之表面外的該耦合裝置7之區域縮減至最小並因 而儘可能地保持該照明裝置之光學效率。 從圖2可看到，提供一金屬線8以將該光感應器3之頂部 接點9與在由該光學耦合裝置7所覆蓋之區域外的一接合墊 10電接觸。該耦合裝置7係略微大於該LED晶片4使得當安 裝於該LED晶片4及該感應器晶片5上時其與該光感應器3 之敏感區域重疊。在面向該光感應器3之底侧上，耦合裝 置7之重疊部分係由一光學衰減器丨丨所覆蓋，該光學衰減 器係由用作一中性密度濾波器的一金屬薄層所製成。用作 137990.doc 200945300 - 光學衰減器11之金屬層之厚度係經選擇使得光感應器3的 • 線性敏感度體系來採用在其上的輻照度。此外，在該重疊 區域之側壁及頂側上，該耦合裝置7係藉由一全反射金屬 層12所覆蓋以儘可能阻止光感應器3感知非源自該發光裝 置1之相鄰LED 2的環境光。 從圖3，可看到依據本發明之一第二較佳具體實施例之 篡 一照明裝置。依據本發明之此較佳具體實施例，由耦合裝 置7之底側上的一金屬化所提供的該光學衰減器11係用以 • 與光感應器3之頂部接點9建立一硬接觸。由於依據本發明 之第二較佳具體實施例，在該耦合裝置7周圍施加一「全 面金屬化」，該光感應器3之頂部接點9可藉由在耦合裝置 7頂部上的線接合來傳遞至第二子基板6。 此配置提供額外優點，由於實現在一側上的發光裝置i 之LED 2與另一側上的光感應器3之間的一閉合光學路徑並 因而與任何具有一殘餘空隙的配置相比實現對環境光的一 φ 甚至更多增強遮蔽。此外，由於不需要外部接合墊，故實 現大小的進一步降低。最後，此配置允許使用市售光電二 極體，從而節省本來需要的自訂裝置之成本。 雖然已在圖式及前述說明中詳細解說並說明本發明，但 是此類解說及說明應視為解說性或範例性而非具限制性； 本發明並不限於所揭示的具體實施例。 根據該等圖式、揭示内容及隨附申請專利範圍之研究， 熟習此項技術人士可在實施本聲明發明中明白並實現所揭 不的具體實施例之其他變化例。在申請專利範圍中，詞語 137990.doc 200945300 「包含」並不排除其他元件或步驟，且*定冠詞「― 二」並不排除複數個。在互相不同的附屬項中陳二 一又ϊ之纟_實並不表明無法有利地使用該等度」 組合。申請專利範圍令的任何參考 ^ 一 範疇。 $付現岣不應視為限制該 【圖式簡單說明】 參考上述具體實施例已明白 予以_。 ^之該些及其他態樣並 在圖式中 圖1以一 斷面圖描述依據本發明之一第 例之一照明裝置， 較佳具體實施 圖2以 俯視圖描述依據本發明 之照明裝置，以及 *月之第-較佳具體 實施例 圖3以 斷面圖描述依據本發明之一第 例之一照明裝置。 【主要元件符號說明】 較佳具體實施 1 2 3 4 5 6 7 8 發光裝置 LED 光感應器 LED晶片 感應器晶片 第二子基板 光學耦合裝置 金屬線 137990.doc 200945300 9 頂部電接點 10 接合墊 11 光學衰減器 12 反射金屬層 13 焊接連接物 參 137990.doc -11-While solid-state lighting is addressing lighting applications, the precise color control of multiple lED applications is discussed as a key difference in emerging industries. However, several concepts for precise color control of multiple LED lamps include optical feedback via some optical sensors to monitor the instantaneous light output. A range of concepts include flux sensing and color point monitoring of the color strings included in the lamp. Finally, the sensor system should be able to track the contribution of each single source (i.e., each single LEd). Among the solutions discussed so far, some rely on integrated LED/sensor packages that use slightly diffused ceramic optics to couple light from the LEDs to the inductor. Special metallization of the ceramic optical component can be used to inhibit ambient light from reaching the inductor. In this way, the sensor only senses light from its neighboring LEDs of the same package. In prior art configurations, the calibration workload was quite large, making implementing feedback feedback in the application both complex and time consuming. SUMMARY OF THE INVENTION One object of the present invention is to provide an easy-to-adjust and easily calibratable illumination device having a light-emitting device and a light sensor for optical feedback by on-line monitoring of light output. . This object is achieved by an illumination device having a 137990.doc 200945300 illumination device and a light sensor for optical feedback by on-line monitoring of the light output, wherein the illumination The device and the light sensor are disposed adjacent to each other and at least partially covered by an optical coupling device for coupling a portion of the emitted light from the light emitting device to the light sensor, and wherein an optical attenuator is The optical coupling device is coupled to the light sensor. With this configuration, the light signal of the light sensor can be adjusted such that it spans only a predetermined range. In particular, in accordance with a preferred embodiment of the present invention, the optical reducer is adapted to be within a pre-current range of one of the illumination devices (preferably within the full drive current range of the illumination device) The detected light intensity provides a linear optical signal of the light sensor. Accordingly, the present invention provides the possibility of avoiding saturation of the light sensor prior to driving the illumination device at a nominal or maximum current. In general, different types of illumination devices can be used. However, in accordance with a preferred embodiment of the present invention, the illumination device comprises a plurality of LEDs. Moreover, the optical coupling device can be made of different materials having different optical characteristics. However, in accordance with a preferred embodiment of the present invention, the optical coupling device is optically diffusive. Furthermore, in accordance with a preferred embodiment of the present invention, the optical face joining device is made of a material which is preferably a phosphor ceramic material. Such materials can be designed to become very stable over a wide temperature range and over a long lifetime. The wavelength stability of the phosphor pottery provides the possibility of color control via pure flux feedback. The optical attenuator between the optical facet and the light sensor can be designed in different ways. However, in accordance with one preferred embodiment of the present invention, 137990.doc 200945300, the optical attenuator includes a neutral density filter, a damping layer or/and a mask having a hole. Furthermore, in accordance with one preferred embodiment of the present invention: 'The optical attenuator comprises a metal [and, preferably, the optical attenuator is sighed by the inductor itself or at the optics facing the inductor On the side of the device. In general, the optical coupling device does not have to have any additional layers. However, in accordance with a preferred embodiment of the invention in the winter, the optical coupling means is covered by a reflective layer, preferably a fully reflective layer, in at least the area covering the light sensor. In this way, the sensor is prevented from perceiving ambient light that is not derived from the illumination device itself. Further, it is preferred that the reflective layer comprises a reflective metal I. In particular, the reflective metal layer is preferably thicker than one of the optical attenuators used between the optical coupling device and the optical sensor. Furthermore, the present invention provides the possibility of a new packaging opportunity, as set forth below: According to a preferred embodiment of the invention, the reflective metal layer is continuously disposed on the upper side of the optical coupling device opposite the light sensor The side portion connecting the upper side and the lower side of the optical coupling device directly contacting the optical sensor via the optical attenuator is composed of a metal layer, wherein the metal layer is used as the optical attenuator for electrical contact The top electrical contact of the light sensor and the reflective metal layer enable the top electrical contact of the light sensor to be electrically connected via a reflective layer on the upper side of the optical coupling device. This allows the use of commercially available photodiodes' which generally require the joining of top contacts. Alternatively, in accordance with a preferred embodiment of the present invention, the light sensor package 137990.doc 200945300 includes a top electrical contact facing the optical attenuator, wherein the electrical contact is electrically connected to the optical A bond pad outside the area covered by the coupling device in this manner 'electrically contacts the light sensor without interfering with the function of the optical attenuator. The illumination device according to the invention is preferably used for multi-LED applications with flux feedback color control, such as future solid state, in particular - store lighting systems, - residential lighting systems, - accent lighting systems, - spotlighting systems , - Theater lighting system, - Fiber optic application system, - Projection system, - Self-illuminated display system, - Pixelated display system, - Segmented display system, - Warning sign system, - Medical lighting application system, - No light sign, SiS, - decorative lighting systems, - portable systems, and - automotive applications. [Embodiment] A configuration for a lighting device according to a first preferred embodiment of the present invention 137990.doc 200945300 can be seen from Figs. 1 and 2. The illumination device according to the first preferred embodiment of the present invention comprises a light-emitting device 1 which is made of an LED 2; and a light sensor 3' for performing on-line monitoring of the light output of the light-emitting device Optical feedback. The illuminating device 1 and its LEDs are connected to the LED wafer 4 by means of a material connection 13 and the optical sensor (4) is arranged on a sensor cymbal 5. The LED chip 4 and the inductor wafer 5 are disposed adjacent to each other on a second sub-substrate 6. The second sub-substrate 6 provides electrical contact to the illumination device 1 and the bottom electrode of the photosensor 3, which is typically a cathode for most commercially available photodiodes used as the photosensor 3. The sensing area of the light sensor 3 is positioned near the edge of the LED chip 4 to be as close as possible to the LED 2 of the light emitting device. In order to partially couple a part of the light emitted by the illumination device 1 to the light sensor 3, an optical coupling device 7 made of a phosphor ceramic is provided. The light sensor is positioned adjacent to the edge of the LED wafer 4. The sensitive area of 3 reduces the area of the coupling means 7 extending beyond the surface of the illumination device 1 to a minimum and thus maintains the optical efficiency of the illumination device as much as possible. As can be seen from Figure 2, a metal wire 8 is provided to electrically contact the top contact 9 of the light sensor 3 with a bond pad 10 outside the area covered by the optical coupling device 7. The coupling means 7 is slightly larger than the LED chip 4 such that it overlaps the sensitive area of the light sensor 3 when mounted on the LED chip 4 and the sensor wafer 5. On the bottom side facing the light sensor 3, the overlapping portion of the coupling means 7 is covered by an optical attenuator which is made of a thin metal layer used as a neutral density filter. to make. Used as 137990.doc 200945300 - The thickness of the metal layer of the optical attenuator 11 is selected such that the linear sensitivity system of the light sensor 3 employs the irradiance thereon. Furthermore, on the side walls and the top side of the overlap region, the coupling device 7 is covered by a total reflection metal layer 12 to prevent the light sensor 3 from sensing the adjacent LEDs 2 not from the illumination device 1 as much as possible. Ambient light. From Fig. 3, a lighting device in accordance with a second preferred embodiment of the present invention can be seen. In accordance with this preferred embodiment of the invention, the optical attenuator 11 provided by a metallization on the underside of the coupling means 7 is used to establish a hard contact with the top contact 9 of the light sensor 3. Since a "full metallization" is applied around the coupling means 7 in accordance with a second preferred embodiment of the present invention, the top contact 9 of the light sensor 3 can be engaged by wire bonding on the top of the coupling means 7. Transfer to the second sub-substrate 6. This configuration provides an additional advantage in that a closed optical path between the LED 2 of the illumination device i on one side and the light sensor 3 on the other side is achieved and thus compared to any configuration with a residual gap A φ or even more of the ambient light enhances the shadow. In addition, a further reduction in size is achieved since no external bond pads are required. Finally, this configuration allows the use of commercially available photodiodes, saving the cost of custom devices that would otherwise be required. The present invention has been described and illustrated in detail in the drawings and the claims. Other variations to the specific embodiments disclosed may be apparent to those skilled in the <RTIgt; In the scope of the patent application, the word 137990.doc 200945300 "includes" does not exclude other elements or steps, and the *definite article "-" does not exclude plural. In two different sub-items, Chen Yiyi and ϊ 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 。 Any reference to the scope of application for patents ^ a category. $付岣岣 should not be considered as a limitation. [Simplified description of the drawings] It has been understood with reference to the above specific embodiments. These and other aspects, and in the drawings, FIG. 1 illustrates a lighting device according to one embodiment of the present invention in a cross-sectional view, and FIG. 2 is a detailed view of the lighting device according to the present invention in a plan view, and *Monthly - Preferred Embodiment FIG. 3 is a cross-sectional view showing a lighting device according to a first example of the present invention. [Main component symbol description] Preferred embodiment 1 2 3 4 5 6 7 8 Light-emitting device LED light sensor LED chip sensor wafer second sub-substrate optical coupling device metal wire 137990.doc 200945300 9 top electric contact 10 bonding pad 11 Optical attenuator 12 Reflective metal layer 13 Welded joint reference 137990.doc -11-