201120360 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種發光二極體燈具’特別是一種依據燈具發熱 現況控制驅動電路的發光二極體燈具。 【先前技術】 發光二極體(Light Emitting Diode，LED)具有體積小、壽命長、 低驅動電壓、耗電量低、耐震性佳等優點。因此，發光二極體的 應用愈來愈廣泛’從低亮度顧到高亮度的朗均有許多實例。 高亮度應用方式的例子可見於路燈或探照燈等等。 將發光二極體應用於高亮度之燈具時，除了亮度是否足夠需 考量外，散熱問題往往是接著必須考慮的。針對散熱問題而言， 同一發光二極體在不同操作溫度下工作，其發光效率不同，而且 使用壽命也有所差異。因此，散熱設計對於發光二極體燈具而言， 相當重要。 此外，燈具在设計上往往有光形之要求，意即對燈具所發出 之光線的強度分佈情形亦有所規範。此項要求，在路燈設計上相 形重要。路燈之光形若未符合規定，將無法達到該路燈所要求的 照明效果。 基於上述發光強度、發光光形及散熱之要求，業者仍需考量 路燈位於室外的特殊環境因素，例如日夜、寒暑間的高低溫差。 為解決該些問題’業者多以閉迴路方式設計燈具，以能夠即時對 燈具所發出之光線進行控制。 201120360 此類專利可見於台灣公告第1297382號專利、美國第6517218, , 6481874號專利。 【發明内容】 雖然業者提出多種燈具之架構，但並無依據發光二極體對溫 度的響應所設計的燈具，因此，現有燈具都存在著發光二極體長 時間工作在高溫環境，導致壽命減短或是隨著環境溫度變異造成 輸出光通量與輸出光形變化之情形。 • 在一實施例中提出一種發光二極體燈具，其包含基板、多個 發光二極體群、驅動電路、多個溫度感應器、記憶體及控制器， 發光二極體群分別配置於該基板。驅動電路驅動發光二極體群發 光。溫度感應器對應發光二極體群配置並各別感應發光二極體群 之即時溫度。s己憶體儲存有查閱表。查閱表具有多個溫度值及對 應溫度值的多個驅動參數。控制器接收溫度感應器所傳回之即時 溫度，並依據即時溫度在查閱表查閱即時溫度對應的驅動參數， 鲁並以驅動參數致動驅動電路以驅動發光二極體群。 前述每個發光二極體群係對應至少一個溫度感應器。 在另一實施例中，控制器將對應於同一發光二極體群的溫度 感應器所傳來的即時溫度取得一平均溫度後，依據該些平均溫度 在該查閱表查閱溫度對應的該些驅動參數，並以該些驅動參數致 動該驅動電路驅動該些發光二極體群。 在另-實施例中，發光二極體燈具另包含至少—光感應器。 光感應器感測發光二極體群之發光強度。查閱表另包含多個亮度 201120360 值’該些錢祕對辆些溫度值及該魏動參數。該控制器係 接收該發光贿JUx該發光強度及即時溫度在該細表查閱 該些發光強度及雜即時溫度對應的該些驅動參數，並以該些驅 動參數致動該驅動電路驅動該些發光二極體群。 藉由上述實施例之架構，可以針對當前燈具整體發熱現況進 行發光二極體驅動參數之難，贿整健具的發絲形、發光 壳度及發光二極體的工作溫度達到較佳化。 然而，當光感測器所監測到的光通量不足時，雖然此時溫度 感測器所提供的訊號，可能會使控㈣須以較低功率驅動。為確 保道路燈具哺定㈣功能與用路人安全，將以光制器的訊號 為主要驅動參數，溫度感測器的訊號為輔。 有關本發明的特徵與實作，茲配合圖示作最佳實施例詳細說 明如下。 【實施方式】 首先，請參閱「第1圖」。「第1圖」為本發明一實施例之發 光二極體燈具應用於一路燈之示意圖。圖中可以看見發光二極體 燈具20係設置於一燈架10之末端。發光二極體燈具20被驅動後， 係產生一總光形12，此光形係需符合該路段路燈光形之要求。圖 中之總光形12在本實施例中包含了三個子光形12〇, 122, 124。總 光形12係由發光二極體燈具20所配置的所有發光二極體(LED,201120360 VI. Description of the Invention: [Technical Field] The present invention relates to a light-emitting diode lamp ‘in particular to a light-emitting diode lamp that controls a driving circuit according to a heating condition of a lamp. [Prior Art] Light Emitting Diode (LED) has the advantages of small size, long life, low driving voltage, low power consumption, and good shock resistance. Therefore, the application of light-emitting diodes has become more and more extensive. There are many examples from low brightness to high brightness. Examples of high brightness applications can be found in street lights or searchlights and the like. When applying a light-emitting diode to a high-brightness luminaire, in addition to the need for sufficient brightness, heat dissipation problems must often be considered. For the heat dissipation problem, the same LED operates at different operating temperatures, and its luminous efficiency is different, and the service life is also different. Therefore, the heat dissipation design is quite important for the light-emitting diode lamp. In addition, the design of the luminaire often has a light shape, which means that the intensity distribution of the light emitted by the luminaire is also regulated. This requirement is particularly important in the design of street lights. If the light shape of the street light does not meet the requirements, the lighting effect required by the street light will not be achieved. Based on the above requirements of luminous intensity, luminous shape and heat dissipation, the industry still needs to consider the special environmental factors of the street lamp located outdoors, such as the high and low temperature difference between day and night and cold and summer. In order to solve these problems, the industry has designed the lamps in a closed loop to control the light emitted by the lamps in real time. 201120360 Such patents can be found in Taiwan Patent No. 1297382, US Pat. No. 6,517,218, and No. 6,481,874. SUMMARY OF THE INVENTION Although the manufacturer proposes a variety of luminaire architectures, there is no luminaire designed according to the response of the illuminating diode to temperature. Therefore, existing luminaires have long-term operation of the illuminating diode in a high temperature environment, resulting in reduced lifetime. Short or a change in output luminous flux and output light shape as a function of ambient temperature variation. In an embodiment, a light-emitting diode lamp includes a substrate, a plurality of light-emitting diode groups, a driving circuit, a plurality of temperature sensors, a memory, and a controller, wherein the light-emitting diode group is respectively disposed on the light-emitting diode Substrate. The driving circuit drives the light emitting diode group to emit light. The temperature sensor corresponds to the light-emitting diode group configuration and individually senses the instantaneous temperature of the light-emitting diode group. The suffix has a lookup table. The lookup table has multiple drive parameters with multiple temperature values and corresponding temperature values. The controller receives the instantaneous temperature returned by the temperature sensor, and refers to the driving parameter corresponding to the instantaneous temperature according to the instantaneous temperature in the look-up table, and drives the driving circuit to drive the LED group with the driving parameter. Each of the foregoing groups of light emitting diodes corresponds to at least one temperature sensor. In another embodiment, after the controller obtains an average temperature of the instantaneous temperature corresponding to the temperature sensor corresponding to the same LED group, the controllers refer to the drives corresponding to the temperature according to the average temperature. And driving the driving circuit to drive the light emitting diode groups with the driving parameters. In another embodiment, the light-emitting diode lamp further comprises at least a light sensor. The light sensor senses the luminous intensity of the light emitting diode group. The lookup table also contains multiple brightnesses. The 201120360 value is used to determine the temperature values and the parameters. Receiving, by the controller, the illumination intensity and the instantaneous temperature, the plurality of driving parameters corresponding to the illumination intensity and the instantaneous temperature, and actuating the driving circuit to drive the illuminations by using the driving parameters A group of diodes. With the structure of the above embodiment, it is difficult to carry out the driving parameters of the LED in the current heat generation condition of the entire lamp, and the hair-shaped shape, the light-emitting shell degree and the operating temperature of the light-emitting diode of the bribe are improved. However, when the light flux detected by the photo sensor is insufficient, although the signal provided by the temperature sensor at this time may cause the control (4) to be driven at a lower power. In order to ensure the function of the road lamps (4) and the safety of passers-by, the signal of the light controller is taken as the main driving parameter, and the signal of the temperature sensor is supplemented. The features and implementations of the present invention are described in detail with reference to the preferred embodiments. [Embodiment] First, please refer to "Figure 1". Fig. 1 is a schematic view showing the application of a light-emitting diode lamp to a street lamp according to an embodiment of the invention. It can be seen that the light-emitting diode lamp 20 is disposed at the end of a light stand 10. After the LED illuminator 20 is driven, a total light shape 12 is generated, which is required to conform to the light shape of the road section. The total light shape 12 in the figure contains three sub-light shapes 12, 122, 124 in this embodiment. The total light shape 12 is all light-emitting diodes (LEDs) configured by the light-emitting diode lamp 20
Light Emitting Diode)所產生的。而子光形120, 122, 124可能是由 不同群之該些發光二極體所分別形成的，關於此點，容後詳述。 201120360 續請同時參閱「第2圖」及「第3圖」。「第2圖」為本發明 一實施例之發光二極體燈具之立體示意圖。「第3圖」係為本發 明一實施例之發光二極體燈具之電路方塊示意圖。從圖中可以見 悉’發光一極體燈具20包含了基板22、多個發光二極體群24a，24b， 24c、溫度感應器23¾ 23b，23c、驅動電路25、記憶體26、及控制 器28。 發光二極體群24a，24b，24c包含第一發光二極體群24a、第二 φ 發光二極體群24b、第三發光二極體群24c。每個發光二極體群24a， 24b，24c係包含至少一發光二極體240¾ 240b，240c。發光二極體群 24a，24b，24c係配置於基板22上。其配置的方式依前述總光形12 及子光形120，122，124而定。可以是陣列配置、對稱配置或其他 種配置關係。就本例而言，係採用陣列方式配置。藉此配置方式， 子光形120可以是由第一發光二極體群24a所形成的。子光形122 可以是由第二發光二極體群24b所形成的。子光形124可以是由 • 第三發光二極體群24c所形成的。因此，各別控制驅動第一、第 二、第三發光二極體群24a，24b, 24c的驅動參數(可以是驅動電流 或脈波寬度調變(PWM，Pulse Width Modulation)的屬性)即可控制 總光形12。 在此實施例中，雖然燈具20包含了三個發光二極體群24a，24b， 24c，但並不以此為限。一個燈具20可以包含二個或更多個發光 二極體群 24a，24b，24c。 驅動電路25係用以驅動發光二極體群24a，24b，24c中的發光 201120360 二極體240a，240b，240c發光。前數的驅動參數係由控制器28提 供給驅動電路25。驅動電路25依該驅動參數驅動發光二極體群 24a，24b，24c。驅動參數可以是但不限於驅動電流或pwM的屬 性。驅動電路25可以是但不限於直流電流驅動器或PWM電流驅 動器。若驅動電路25是直流電流驅動器，則驅動參數則是直流電 流的大小。若驅動電路25是PWM電流驅動器，則驅動參數可以 是PWM的脈波寬度與全週期的比值。 溫度感應器23a，23b，23c係對應發光二極體群24a，24b，24c 配置並用以各別感測所對應的發光二極體群24a，2牝，24c的即時 溫度。在此實施例中，每一個發光二極體群2如，24b, 24c係對應 配置有一溫度感應器23a, 23b，23c，但並不以此為限，每個發光二 極體群24\ 24b，24c可對應配置有多個溫度感應器23a，23b，23e。 度感應器23a，23b，23c係感應對應的發光二極體群24a，24b，24c 的即時溫度並回傳給控制器28。 記憶體26儲存有一查閱表。查閱表具有多個溫度值及對應該 些溫度值的多個驅動參數。查閱表的用途在於根據當前即時溫 度，提供適當的驅動參數，以滿足燈具發光強度、發光光形等要 求。關於此查閱表之製作，容後詳述。 控制器28接收溫度感應器23* 23b, 23c所傳回之即時溫产， 並依據即時溫度在查閱表查閱即時溫度所對應的驅動參數，並以 .驅動參數致動驅動電路驅動發光二極體群。因此，控制器Μ即可 依據燈具20當前溫度而驅動發光二極體群24a，24b，24c產生所需 201120360 光形’並且使發光二極體群24a, 24b，24c能工作在預定的操作溫 度内。 前述溫度感應器23a, 23b5 23c所配置的較佳位置為較能表達 所對應的發光二極體群24a, 24b，24c的溫度的位置。例如，第一 溫度感應器23a係設置於第一發光二極體群24a的幾何中心的位 置。或者是位於第一發光二極體群24a在正常工作時，發熱溫度 最尚的位置。當然亦可以是配置在第一發光二極體群24a在正常 φ 工作時’發熱温度最低或平均溫度的位置。 刖述溫度感應器23a，23b，23c所配置的位置與查閱表之掣作 具有相當的關連性。查閱表係針對同一系列的燈具2〇而製作。查 閱表的製作主要係在燈具20完成後，以初始設定的驅動參數驅動 發光。此時，燈具20所發出之光線的總光形12應與設計時相近。 待發光穩定(穩態、)後~進行溫度曲線之量測。此時可以測得依初始 轉參數所得之各發光二極料24a，職24ς所對應的溫度。接 鲁著’提高或降低環境溫度，待燈具穩定後，適當調整各發光二極 體群2如，2扑，2如的驅動參數，以達到總光形12之要求此時量 測各發光二極體群24a，2处，24c所對應的溫度並記錄之。 睛參考下方之查·’當域·所提供的照度參數不足以 提供足朗道賴日㈣，將依不_驅動參數供應糕於不同的 發光一極體群24a，撕，24e。下表中的Ή，n分別代表對應第一發 光二極體群24a之即時溫度及驅動參數(電流值）。τ2, i2分別代表 對應第二發光二極體群施之即時溫度及驅動參數。η，时別代 201120360 表對應第二發光二極體群24c之即時溫度及驅動參數。由於第一 與第三發光二極體群24a，24c係為對稱設計’故可將兩個參數值 簡化成同-參數(溫度值與驅動參數），俾利解說，冑然亦可分別 量測與製表。㈣溫度的單仙攝氏溫度制。電驗單位以毫 安培為例。 Τ1,Τ3 (°〇 Τ2 (°〇 45〜55 45 〜60 55 〜70 60 〜75 70 〜88 75 〜95 88以上 95以上 —11 二Light Emitting Diode). The sub-light shapes 120, 122, 124 may be formed by different groups of the light-emitting diodes, and details will be described later. 201120360 Please refer to "Figure 2" and "Figure 3" at the same time. Fig. 2 is a perspective view showing a light-emitting diode lamp according to an embodiment of the present invention. Fig. 3 is a block diagram showing the circuit of a light-emitting diode lamp according to an embodiment of the present invention. As can be seen from the figure, the 'light-emitting diode lamp 20 includes a substrate 22, a plurality of light-emitting diode groups 24a, 24b, 24c, temperature sensors 233⁄23 23b, 23c, a driving circuit 25, a memory 26, and a controller. 28. The light-emitting diode groups 24a, 24b, and 24c include a first light-emitting diode group 24a, a second φ light-emitting diode group 24b, and a third light-emitting diode group 24c. Each of the light emitting diode groups 24a, 24b, 24c includes at least one light emitting diode 2403⁄4 240b, 240c. The light-emitting diode groups 24a, 24b, and 24c are disposed on the substrate 22. The manner of configuration depends on the aforementioned total light shape 12 and sub-light shapes 120, 122, 124. It can be an array configuration, a symmetric configuration, or other configuration relationship. For this example, it is configured in an array. By this arrangement, the sub-light shape 120 can be formed by the first light-emitting diode group 24a. The sub-light shape 122 may be formed by the second light-emitting diode group 24b. The sub-light shape 124 may be formed by the third light-emitting diode group 24c. Therefore, the driving parameters of the first, second, and third LED groups 24a, 24b, and 24c (which may be the characteristics of the driving current or the Pulse Width Modulation) may be individually controlled. Control the total light shape 12. In this embodiment, although the luminaire 20 includes three groups of LEDs 24a, 24b, 24c, it is not limited thereto. A luminaire 20 can contain two or more illuminating diode groups 24a, 24b, 24c. The driving circuit 25 is for driving the light-emitting 201120360 diodes 240a, 240b, 240c in the light-emitting diode groups 24a, 24b, 24c to emit light. The first number of drive parameters are supplied to the drive circuit 25 by the controller 28. The drive circuit 25 drives the light-emitting diode groups 24a, 24b, 24c in accordance with the drive parameters. The drive parameters can be, but are not limited to, the drive current or the nature of the pwM. The drive circuit 25 can be, but is not limited to, a DC current driver or a PWM current driver. If the drive circuit 25 is a DC current driver, the drive parameter is the magnitude of the DC current. If the drive circuit 25 is a PWM current driver, the drive parameter can be the ratio of the pulse width of the PWM to the full period. The temperature sensors 23a, 23b, 23c are arranged to correspond to the light-emitting diode groups 24a, 24b, 24c and are used to sense the instantaneous temperatures of the corresponding light-emitting diode groups 24a, 2, 24c. In this embodiment, each of the light-emitting diode groups 2, such as 24b, 24c, is provided with a temperature sensor 23a, 23b, 23c, but not limited thereto, each light-emitting diode group 24\24b 24c can be configured with a plurality of temperature sensors 23a, 23b, 23e. The degree sensors 23a, 23b, 23c sense the instantaneous temperatures of the corresponding light-emitting diode groups 24a, 24b, 24c and transmit them back to the controller 28. The memory 26 stores a lookup table. The lookup table has multiple temperature values and multiple drive parameters corresponding to the temperature values. The purpose of the look-up table is to provide appropriate drive parameters based on the current instantaneous temperature to meet the luminaire's luminous intensity, illuminating shape and other requirements. The production of this lookup table will be detailed later. The controller 28 receives the instant temperature output returned by the temperature sensor 23* 23b, 23c, and refers to the driving parameter corresponding to the instantaneous temperature in the look-up table according to the instantaneous temperature, and drives the driving circuit to drive the light-emitting diode with the driving parameter. group. Therefore, the controller 驱动 can drive the LED group 24a, 24b, 24c to generate the desired 201120360 light shape according to the current temperature of the lamp 20 and enable the LED group 24a, 24b, 24c to operate at a predetermined operating temperature. Inside. The preferred positions of the temperature sensors 23a, 23b5 23c are positions at which the temperatures of the corresponding light-emitting diode groups 24a, 24b, 24c can be expressed. For example, the first temperature sensor 23a is disposed at a position of the geometric center of the first light-emitting diode group 24a. Alternatively, it is located at the position where the first light-emitting diode group 24a is in the normal operation and the heat generation temperature is the most. Of course, it is also possible to arrange the position where the first light-emitting diode group 24a has the lowest heat generation temperature or the average temperature during the normal φ operation. It is to be noted that the positions at which the temperature sensors 23a, 23b, 23c are arranged have a considerable correlation with the operation of the look-up table. The look-up table is made for the same series of lamps. The production of the look-up table is mainly based on the initial setting of the driving parameters to drive the illumination after the completion of the luminaire 20. At this time, the total light shape 12 of the light emitted by the luminaire 20 should be similar to the design time. After the light is stable (steady state), the temperature curve is measured. At this time, the temperature corresponding to each of the light-emitting diodes 24a and 24's obtained by the initial rotation parameter can be measured. Connected to 'improve or reduce the ambient temperature, after the lamp is stable, properly adjust the driving parameters of each of the light-emitting diode groups 2, 2, 2, etc. to achieve the total light shape 12 requirements. The temperature corresponding to the polar group 24a, 2, 24c is recorded and recorded. The eye is referenced below. The illuminance parameters provided by the domain are not sufficient to provide the full-scale Dalai Lai (4). The parameters will be supplied to the different light-emitting polar group 24a, torn, 24e. In the following table, n, n represents the instantaneous temperature and driving parameters (current values) corresponding to the first light-emitting diode group 24a, respectively. Τ2, i2 respectively represent the instantaneous temperature and driving parameters of the corresponding second LED group. η, 时代代 201120360 The table corresponds to the instantaneous temperature and driving parameters of the second LED group 24c. Since the first and third light-emitting diode groups 24a and 24c are symmetrically designed, the two parameter values can be simplified to the same-parameter (temperature value and driving parameter), and the profit can be separately measured. With tabulation. (4) Temperature single-degree Celsius temperature system. The electricity unit is ampere ampere. Τ1, Τ3 (°〇 Τ2 (°〇45~55 45~60 55~70 60~75 70~88 75~95 88+95+1–11
閲表中H(R〇w)為在室溫柄溫度值與驅_ 四订則為提高環境溫度後的溫度顯驅動參數 挺動參數均县以益HI 电i __ 參數。第 ，ν π π %，兄皿厌傻的溫度值與驅動參數 上述的溫度值與驅動參數均是以範圍方式表示，亦可以特定似 之。娜28在4_ ’軸採嶋法输法的方式查 =應的驅動參數。在第四行的溫度所對應的驅動參數為⑽，即 表工作溫度過高，需將之關閉。 因此’控制器28即可依據各發光二 應的即時溫度糊㈣纖_纽，_ :=發參:致使购電路_動參數-發光二- 二：前::作：::一-In the table, H(R〇w) is the temperature value of the handle at room temperature and the temperature of the drive. The temperature is driven by the parameter. The parameter is used to increase the ambient temperature. First, ν π π %, the temperature value and driving parameters of the brothers are stupid. The above temperature values and driving parameters are expressed in a range manner, and may be specific. Na 28 in the 4 _ axis mining method of the method of checking = the driving parameters should be. The driving parameter corresponding to the temperature in the fourth row is (10), that is, the operating temperature of the meter is too high, and it needs to be turned off. Therefore, the controller 28 can be based on the instant temperature paste of each light-emitting diode (four) fiber_new, _:= hairpin: causing the purchase of the circuit _ moving parameters - illuminating two - two: before:: made::: one -
貫施例。月參閱「第4 ^ L 201120360 本發明一實施例發光二極體240a，240b，240c之操作溫度與發光強 度之關係圖。圖中的水平軸為攝氏溫度。垂直軸為相對發光強度， 也就是說以發光二極體操作溫度為25 °C時，施加一指定驅動參數 的驅動功率予發光二極體240a，240b，240c時，發光二極體24〇a, 240b, 240c的發光強度設定為100%。其它操作溫度下，施加同樣 驅動參數給該發光一極體240a，240b，240c時，該發光二極體240a 240b，240c所發出的光強度與25 〇c時的比值。從圖中可以看出， % 操作溫度愈高，發光二極體240a, 240b, 240c的發光效率較低。依 據此實驗資料，製作一溫度發光效率表(查閱表），做為後續控制器 28查閱使用。此溫度發光效率表之製作可以是在發光二極體24如， 240b，240c尚未配置於基板上時即進行實驗而完成。 其次’於發光二極體操作溫度為25 °C的初始驅動參數對各發 光二極體群24a，24b，24c進行驅動，在達到總光形12之要求時， 量測並記錄第一、二發光二極體群24a，24b的操作溫度。接著將 _ 此操作溫度記錄於查閱表或記憶體26中。 接著’並將發光二極體240a，240b，240c的發光曲線(電流發光 強度曲線)亦圮錄於記憶體26中。如此一來，當控制器π接收到 各發光二極體群24¾ 24b，24c所傳回來的即時溫度時，即可以由 溫度發光效率表中查閱得知目前的發光效率與操作溫度為25 % 時的發光效率的比值，進而得知發光量短少或增加多少。接著， 由電流發光強度曲線將短少或增加的發光量補回，藉以維持所需 之光強度及總光形12。 201120360 剛述發光二極體群24a，24b，24c與溫度感應器23木 23b, 23c 之配置關係係可非以—對—方式配置。若每-個發光二極體群24a， 24b, 24c對應配置有多個溫度感應器23a，23b，時控制器28 將對應同-發光二極體群24a，24b，24e的溫度感應器％现，23c 所傳來的㈣溫度進行平均後取平均溫度。接著，控㈣28依據 平均溫度在查細平均溫度對應_動參數，並以查閱到的 驅動參數致動驅動電路以驅動發光二極體群24a, 24b, 2如發光。 刖述發光一極體群24a, 24b，24c係用以產生總光形12。因此， 每個發光二極體群24a，24b，24c係可包含一個或多個發光二極體 240a，240b，240c。對應同一發光二極體群24a，24b，24c的發光二極 體240a，240b，240c的光電特性可相同或相異。而對應不同發光二 極體群24\ 24b，24c的發光二極體240a，240b，240c的光電特性亦 可相同或相異。前述的光電特性包含了發光二極體24〇a，240b， 240c所發出的光形(光強度等強度線圖，light如如吻pr〇file)、驅動 特性(電流發光強度曲線圖）、内部效率、及外部效率等等。 接著，請參閱「第5圖」。其係為本發明另一實施例之電路 方塊示意圖。圖中可以見悉發光二極體燈具20包含了基板(圖中未 示）、多個發光二極體群2¾ 24b，24c、溫度感應器23a，23b，23c、 驅動電路25、記憶體26、光感測器27及控制器28。發光二極體 群24a，24b，24c係配置於基板22上。驅動電路25係用以驅動發 光二極體群24a，24b，24c發光。溫度感應器23a，23b，23c係對應發 光二極體群24a> 24b，24c配置並用以各別感測所對應的發光二極 12 201120360 體群2如，職Me的即時溫度。光感測器27係被適當配置於基板 或燈架ίο，以感測發光二極體群24a，24b,24c的發光強度。 對應此另一實施例’儲存於記憶體26之查閱表係包含溫度 值、對應溫度值的驅動參數及亮度值。控制器28接收發光強度、 即時溫度並以發光強歧即時溫度在細表細該些發光強度及 該些即時溫度對應的驅動參數，並以該些驅動參數致動該驅動電 路25驅動該些發光二極體群24a, 24b，24c。 關於此另一實施例的查閱表，請參閱下表。下表中的L即代 表照度值，單位為照度(Lux)Throughout the case. See the relationship between the operating temperature and the luminous intensity of the light-emitting diodes 240a, 240b, and 240c according to an embodiment of the present invention. The horizontal axis in the figure is Celsius temperature, and the vertical axis is the relative luminous intensity, that is, When the operating temperature of the light-emitting diode is 25 ° C, when the driving power of a specified driving parameter is applied to the light-emitting diodes 240a, 240b, 240c, the luminous intensity of the light-emitting diodes 24a, 240b, 240c is set to 100%. At other operating temperatures, when the same driving parameters are applied to the light-emitting diodes 240a, 240b, 240c, the ratio of the light intensity emitted by the light-emitting diodes 240a 240b, 240c to 25 〇c is shown. It can be seen that the higher the operating temperature of %, the lower the luminous efficiency of the light-emitting diodes 240a, 240b, 240c. According to the experimental data, a temperature luminous efficiency table (refer to the table) is prepared and used as the subsequent controller 28. The temperature illuminating efficiency table can be fabricated by performing experiments when the illuminating diodes 24, for example, 240b, 240c are not disposed on the substrate. Secondly, the initial driving parameters of the operating temperature of the illuminating diode are 25 °C. Each of the light emitting diode groups 24a, 24b, 24c is driven to measure and record the operating temperatures of the first and second light emitting diode groups 24a, 24b when the total light shape 12 is required. Then, the operating temperature is It is recorded in the look-up table or memory 26. Then 'and the light-emitting curve (current illuminance intensity curve) of the light-emitting diodes 240a, 240b, 240c is also recorded in the memory 26. Thus, when the controller π receives When the instantaneous temperature is transmitted back to each of the light-emitting diode groups 242⁄4 24b, 24c, the ratio of the current luminous efficiency to the luminous efficiency at the operating temperature of 25% can be obtained from the temperature luminous efficiency table, and further known. The amount of luminescence is short or increased. Then, the illuminance of the short or increased radiance is supplemented by the current illuminance intensity curve, thereby maintaining the required light intensity and total light shape 12. 201120360 Just described the light-emitting diode group 24a, 24b, 24c The arrangement relationship with the temperature sensor 23 wood 23b, 23c may be configured in a non-pair manner. If each of the light emitting diode groups 24a, 24b, 24c is correspondingly provided with a plurality of temperature sensors 23a, 23b, time control 28 will correspond to the same - The temperature sensor of the photodiode group 24a, 24b, and 24e is now %, and the temperature of (c) from 23c is averaged to take the average temperature. Then, the control (4) 28 is based on the average temperature in the average temperature corresponding to the _ dynamic parameter, and is referred to The driving parameters are driven to drive the driving circuit to drive the light-emitting diode groups 24a, 24b, 2 such as light. The light-emitting polar group 24a, 24b, 24c is used to generate the total light shape 12. Therefore, each light-emitting second The polar body groups 24a, 24b, 24c may comprise one or more light emitting diodes 240a, 240b, 240c. The photoelectric characteristics of the light-emitting diodes 240a, 240b, 240c corresponding to the same light-emitting diode group 24a, 24b, 24c may be the same or different. The photoelectric characteristics of the light-emitting diodes 240a, 240b, 240c corresponding to the different light-emitting diode groups 24\24b, 24c may be the same or different. The aforementioned photoelectric characteristics include the light shape emitted by the light-emitting diodes 24〇a, 240b, 240c (light intensity equal intensity line diagram, light such as kiss pr〇 file), driving characteristics (current luminous intensity curve), internal Efficiency, external efficiency, and more. Next, please refer to "Figure 5". It is a block diagram of a circuit of another embodiment of the present invention. It can be seen that the LED lamp 20 includes a substrate (not shown), a plurality of LED groups 23b, 24b, 24c, temperature sensors 23a, 23b, 23c, a drive circuit 25, a memory 26, Photosensor 27 and controller 28. The light-emitting diode groups 24a, 24b, and 24c are disposed on the substrate 22. The drive circuit 25 is for driving the light-emitting diode groups 24a, 24b, 24c to emit light. The temperature sensors 23a, 23b, and 23c are configured to correspond to the light-emitting diode groups 24a > 24b, 24c and are configured to respectively sense the corresponding instantaneous temperature of the light-emitting diodes 12 201120360. The photo sensor 27 is suitably disposed on the substrate or the lamp holder to sense the luminous intensity of the light-emitting diode groups 24a, 24b, 24c. The look-up table stored in the memory 26 corresponding to this other embodiment includes a temperature value, a drive parameter corresponding to the temperature value, and a brightness value. The controller 28 receives the luminous intensity, the instantaneous temperature, and details the luminous intensity and the driving parameters corresponding to the instantaneous temperatures by using the luminous intensity, and activates the driving circuit 25 to drive the luminous rays with the driving parameters. Dipole groups 24a, 24b, 24c. See the table below for a lookup table for this other embodiment. The L in the table below represents the illuminance value in illuminance (Lux).
控制器28依據此查閱表查詢所適用的驅動參數。當控制器 所接收到的發光強度大於20 Lux，且Tl，τ3高於88 %，η高 95 °C時’代表過熱而照度超過標準值⑼iux)，此時即會以較侧 201120360 13介於340, 380mA’而介於320〜365 μ)的驅動功率來驅動發 光二極體群 24a，24b，24c。 其次’若發光強度低於20 LUX，則將提高驅動發光二極體群 24a，24b，24c的驅動電流(功率），以得到足夠的照度，以滿足規範 要求。也就是說’當紐· 27所監_的紐量(光強度)不足 時，此時雖然溫度感測器23a，23b，23c戶斤讀到的即時溫度^高， 但仍以提供足夠光強度⑽度)為考量，溫度即時溫度值可以被忽 略。此外，上表中當發光強度小於2〇Lux，且T1，T3高於i2〇〇c， T2高於13G°C時，雖以不輸出電流的方式進行㈣，但並不以此 為限，仍可在安全性考量下，持續提高輸㈣率。表+所訂之2〇 Lux為參考目前法規所訂立’若未來法規對触度有所不同，該 操作模式可配合不同的照度要求進行。 關於光感測器之配置位置’可以是對應所有發光二極體群24a， 24b，24c的適當位置’或者是僅對應單一發光二極_ 2如，職 2如的適當位置。只要在製作查閱表時，以光感測器2?實際量到 的值做為依據即可。至於光感測器27之數量，亦不限於一個。可 以使用夕個光感測器27分別對應不同的聲光二極體群24a，24b， 24c，以得到更精確的總光形12或子光形12〇, 122,124。 最後，為了產生如「第2圖」所示的總光形12，亦可採用如 「第6圖」所示的方式配置。在此實施例中，發光二極體燈具孙 包含了二個發光二極體群32, 34, 36。第一發光二極體群32係用以 產生第-子光形122。第二發光二極體群34包含了六個發光二極 201120360 體子群340, 342, 344, 346, 348, 349。第二發光二極體群34用以產 生第二子光形124。第三發光二極體群36包含了六個發光二極體 子群360, 362, 364, 366, 368, 369。第三發光二極體群36用以產生 第三子光形120。 在此實施例中，為了能得到適當的發光二極體群32, 34, 36的 即時溫度’燈具30包含溫度感測器38a, 38b，38c。其中溫度感測 器38a係用以偵測第一發光二極體群％之即時溫度。而溫度感測 • 器38b，38c則是用以感測第二、第三發光二極體群34, 36的即時 溫度。從圖中可以知道，雖然第二、第三發光二極體群34, 36的 即時溫度是來自於二個溫度感測器38b, 38c，但並無對應關係，溫 度感測器38b，38c所測到的即時溫度可以表示第二、第三發光二 極體群34, 36的整體溫度。雖然，在本實施例中採用二個溫度感 測器38b，38c來檢測第二、第三發光二極體群34, 36的整體溫度， 但並不以此為限。亦可以對每個發光二極體子群342, 344, 346, 鲁 348, 349, 360, 362, 364, 366, 368, 369 各別配置有溫度感測器 38b， 38c，以精確得知每個子群的溫度。 在第一、第二實施例中，雖然發光二極體係以投射光形來區 :但並此為限。分群方式亦可採用以發光二減被配置的 區域來刀群。發光二極體被分群後，所得之即時溫度需與查閱表 及驅動功率相對應即可。 雖然本發明以前述之較佳實施例揭露如上，然其並非用以限 疋本發Θ任何熟習相像技藝者，在不脫離本發明之精神和範圍 ] 15 201120360 β作二許之更動與潤飾’因此本發明之專利保護範圍須視 本說明書所附之申請翻制所界定者為準。 【圖式簡單說明】 第1圖係為本發明一實施例之發光二極體燈具應用於-路燈 之不意圖。 第2圖係為本發明一實施例之發光二極體燈具之立體示意圖。 第3圖係為本發明一實施例之發光二極體燈具之電路方塊示 意圖。 第4圖係為本發明一實施例之發光二極體燈具之操作溫度與擊 發光強度之關係圖。 第5圖係為本發明另一實施例之電路方塊示意圖。 第6圖係為本發明另一實施例之發光二極體燈具應用於一路 燈之示意圖。 【主要元件符號說明】 10 燈架 12 總光形 120,122,124 子光形 20, 30 發光二極體燈具 22 基板 23a, 23b, 23c 溫度感應 24a, 24b, 24c 發光二極體群 240a, 240b, 240c 發光二極體 16 201120360 驅動電路 記憶體 光感測器 控制器 32, 34, 36 發光二極體群The controller 28 queries the applicable drive parameters based on this lookup table. When the controller receives the luminous intensity greater than 20 Lux, and Tl, τ3 is higher than 88%, η high 95 °C when 'represents overheating and the illuminance exceeds the standard value (9) iux), this time will be compared with the side 201120360 13 The driving power of 340, 380 mA' and 320 to 365 μ) drives the LED groups 24a, 24b, 24c. Secondly, if the luminous intensity is lower than 20 LUX, the driving current (power) of the driving light-emitting diode groups 24a, 24b, 24c will be increased to obtain sufficient illumination to meet the specification. That is to say, when the amount of light (light intensity) of the dynasty 27 is insufficient, the temperature sensor 23a, 23b, 23c reads the instantaneous temperature ^, but still provides sufficient light intensity. (10) degrees), temperature temperature values can be ignored. In addition, in the above table, when the luminous intensity is less than 2〇Lux, and T1 and T3 are higher than i2〇〇c, and T2 is higher than 13G°C, although the current is not outputted (4), it is not limited thereto. The rate of transmission (four) can still be continuously improved under security considerations. Table 2 of the 2 〇 Lux is based on current regulations. If the future regulations differ in sensitivity, this mode of operation can be adapted to different illuminance requirements. The arrangement position of the photosensors 'may be an appropriate position corresponding to all of the light-emitting diode groups 24a, 24b, 24c' or an appropriate position corresponding only to a single light-emitting diode 2, for example. As long as you make the look-up table, you can use the value of the light sensor 2? As for the number of the photo sensors 27, it is not limited to one. The evening light sensors 27 can be used to correspond to different sound and light diode groups 24a, 24b, 24c, respectively, to obtain a more accurate total light shape 12 or sub-light shape 12, 122, 124. Finally, in order to generate the total light shape 12 as shown in "Fig. 2", it can also be arranged as shown in Fig. 6. In this embodiment, the light-emitting diode lamp includes two light-emitting diode groups 32, 34, 36. The first array of light emitting diodes 32 is used to generate a first sub-light pattern 122. The second illuminating diode group 34 includes six illuminating bipolar 201120360 body subgroups 340, 342, 344, 346, 348, 349. The second array of light emitting diodes 34 is used to produce a second sub-light 124. The third illuminating diode group 36 includes six light emitting diode sub-groups 360, 362, 364, 366, 368, 369. The third LED group 36 is used to generate a third sub-light 120. In this embodiment, the luminaire 30 includes temperature sensors 38a, 38b, 38c in order to obtain a suitable instant temperature of the LED population 32, 34, 36. The temperature sensor 38a is configured to detect the instantaneous temperature of the first group of light emitting diodes. The temperature sensing devices 38b, 38c are for sensing the instantaneous temperature of the second and third LED groups 34, 36. As can be seen from the figure, although the instantaneous temperatures of the second and third LED groups 34, 36 are from the two temperature sensors 38b, 38c, there is no corresponding relationship, and the temperature sensors 38b, 38c The measured instantaneous temperature may represent the overall temperature of the second and third illuminating diode groups 34, 36. Although two temperature sensors 38b, 38c are used in the present embodiment to detect the overall temperature of the second and third LED groups 34, 36, it is not limited thereto. Each of the light-emitting diode sub-groups 342, 344, 346, Lu 348, 349, 360, 362, 364, 366, 368, 369 can also be provided with temperature sensors 38b, 38c, respectively, to accurately know each The temperature of the subgroups. In the first and second embodiments, although the light-emitting diode system is in the form of a projected light shape: it is limited thereto. The grouping method can also use a region in which the illuminating is reduced to the knives. After the light-emitting diodes are grouped, the instantaneous temperature obtained should be matched with the look-up table and the driving power. Although the present invention has been disclosed above in the above preferred embodiments, it is not intended to limit the scope of the present invention to those skilled in the art, without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention is subject to the definition of the application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a light-emitting diode lamp according to an embodiment of the present invention applied to a street lamp. 2 is a perspective view of a light-emitting diode lamp according to an embodiment of the present invention. Fig. 3 is a circuit block diagram of a light-emitting diode lamp according to an embodiment of the present invention. Fig. 4 is a graph showing the relationship between the operating temperature and the intensity of the illuminating light of the illuminating diode lamp according to an embodiment of the present invention. Figure 5 is a block diagram of a circuit according to another embodiment of the present invention. Fig. 6 is a schematic view showing the application of a light-emitting diode lamp to a street lamp according to another embodiment of the present invention. [Main component symbol description] 10 lamp holder 12 total light shape 120, 122, 124 sub-light shape 20, 30 light-emitting diode lamp 22 substrate 23a, 23b, 23c temperature sensing 24a, 24b, 24c light-emitting diode group 240a, 240b, 240c light Diode 16 201120360 Drive Circuit Memory Light Sensor Controller 32, 34, 36 Light Emitter Group
25 26 27 28 340, 342, 344, 346, 348, 349 發光二極體子群 360, 362, 364, 366, 368, 369 發光二極體子群 38a, 38b, 38c 溫度感測器25 26 27 28 340, 342, 344, 346, 348, 349 Light-emitting diode subgroups 360, 362, 364, 366, 368, 369 Light-emitting diode subgroups 38a, 38b, 38c Temperature sensors
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