TWI285354B - Device for detecting the energy of LED light sources and its feedback device - Google Patents

Device for detecting the energy of LED light sources and its feedback device Download PDF

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Publication number
TWI285354B
TWI285354B TW93121787A TW93121787A TWI285354B TW I285354 B TWI285354 B TW I285354B TW 93121787 A TW93121787 A TW 93121787A TW 93121787 A TW93121787 A TW 93121787A TW I285354 B TWI285354 B TW I285354B
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Taiwan
Prior art keywords
led
light
group
energy
current
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TW93121787A
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Chinese (zh)
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TW200605006A (en
Inventor
Yi-Fang Lin
Ming-Hsiang Yu
Jyh-Chang Lin
Yun-Yun Wang
Yen-Chuan Chu
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Radiant Opto Electronics Corp
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Publication of TWI285354B publication Critical patent/TWI285354B/en

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Abstract

A device for detecting the energy of LED light sources and its feedback device are disclosed. In an LED assembly, the red LED group, the green LED group, and the blue LED group are individually series-connected to LED detectors whose output signal is transmitted to an optical detector to detect the energy of light sources. The energy of lights is detected and the signal is transformed into a current whose current value is adequate to the detected energy. A current transformer can transform the current into a voltage. A signal transformer can transform the analog voltage signal into a digital signal. A processor can compare and calculate the difference of the energy of the light sources to modulate the output voltage by using a driver to adjust the current and send a feedback signal to the LED assembly. When the LED assembly of a light source device is emitting lights, the detection and the feedback of the energy of the lights can be completely monitored, so the white balance of the light source of the LED assembly can be maintained.

Description

1285354 »* ’九、發明說明: 【發明所屬之技術領域】 本發明係提供-種LED能量檢測及雜裝置,尤指於面光 源震置中L E D燈組發光時,全程進行檢測回授,以確^ l e 〇 燈組光源白平衡之裝置。 μ 【先前技術】 按’面光職置係做m面板顯科,—極為重要之光源 提供來源,而如圖一所示,習知之面光源裝置i,主要具有一導 光板1 Q,該導光板1 Q之出光面i Q i則配置有為數不等之光 擴散70件1 1 ’以及做為凝聚絲、導正出光方向用之聚光源件 1 2 ;導光板1 〇之反射面X 〇 2則設置有數量極為眾多之導光 點10 3,再貼設-反射板!3於反射面工〇 2外,在於導光板 10中至少有-入光面1〇 4,於該入光面i 〇 4外側係配置有 led(發光二極體)燈泡之LED燈組14;該LED燈組丄 4係由紅光(R) LED燈群14!、綠光⑹LED燈群丄 4 2、藍光(B) LED燈群14 3所予以串聯組成。 其運作上’則如圖二所示,L ED燈組1 4之各個、红光(R) L ED燈群141、綠光(G) L ED燈群14 2、藍光(B) LED燈群1 4 3同af發光’軸導光板丄〇之人光面丄〇4射 入’同k間亦進行各色光之混光動作,而終成白光之光源,逕朝 導光板10内傳遞,再經導光點!〇 3及反射板丄〇 2作光反射 方向之改變,而續經光擴散元件工丄予以光源之柔化,再經聚光 5 1285354 几件12行聚光集中光線’最後離開面光源裝置丨,而供給予液 晶面板所利用。 ° 同之電流,並分別依-、光強度相近;二、顏色相近;三、順向 (v f )電壓相近,城三項相近頻率之測得參數進行_選,而 予以分類(B i n ) ’其中為滿足各色光L E D行絲後,能達預 又’LED燈組14中之屬紅光(r)LEd燈群141、 綠光⑹LED燈群142、藍光⑻LED燈群143中 之各L E D燈泡’於組裝之前,必須先行確認出够l e d燈群 中之各L E D是否為_之躲,其戦方式戦相導通一相 ^之白絲現,即·白平衡,故,_時自可缝品之要求規 範’再依各家廠商自訂之容許差異值,分別集合進行組裝,而組 褒成-LED燈組1 4 ’俾裝設於面光職置!之後,即可提供 其應有之光源供應。 然,因經長時間使用後元件呈衰弱 '不穩定等因素,經常發 生LED燈組14中有某一LED燈群之光能量表現不佳,導致 整個LED燈組14所混成之白光,無法滿足預設之白平衡條 件,對於後續該光源之應用,有極為不利之情形。而經組裝後, 甚至是已交至一般使用者開始使用後,即使發現已有此現象,但 卻無從得知該LED燈組14中,究竟是哪一個或哪一些led 燈群出現問題,且該項產品早已為—模組化之設計,更無從進行 相關之修繕補救ji作。故,如何在L E D燈組丄4已組裝於面光 1285354 E D燈群出之光 加以修正補救, 源衣置1後’麟隨時不_進行侧其中各^ 能,輪出情形’以及’進—步針對侧到之結果 正是目前目_職界通克服之課題。 【發明内容】 本i明之主要目的,乃在雜供—#led^量檢測及回授1285354 »* 'Nine, invention description: [Technical field of invention] The present invention provides a kind of LED energy detection and miscellaneous device, especially when the LED light group emits light in the surface light source, the whole process is detected and feedback, It is true that the device is white light balance device. μ [Prior Art] According to the 'Face Light Positioning System, the m-panel display is the most important source of light source. As shown in Figure 1, the conventional surface light source device i mainly has a light guide plate 1 Q. The light-emitting surface i Q i of the light plate 1 Q is provided with a plurality of light-diffusing 70 pieces 1 1 'and a concentrated light source member 1 2 for condensing the wire and guiding the light-emitting direction; and a reflecting surface X 导 of the light-guiding plate 1 2, there are a large number of light guide points 10 3, and then attached - reflector! 3 outside the reflective surface 2, the light guide plate 10 has at least - light entrance surface 1〇4, outside the light entrance surface i 〇4 is arranged with LED (light emitting diode) bulb LED light group 14; The LED lamp group 丄4 is composed of a red (R) LED group 14!, a green (6) LED group 丄4, and a blue (B) LED group 143. Its operation is as shown in Figure 2. Each of the L ED lamp groups 14 , red (R) L ED lamp group 141 , green light (G) L ED lamp group 14 2 , blue light (B) LED group 1 4 3 with af illuminating 'axis light guide 丄〇 丄〇 光 光 射 射 射 射 射 射 射 射 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同 同Through the light guide! 〇3 and the reflector 丄〇2 make a change in the direction of light reflection, and continue to soften the light source through the work of the light diffusing element, and then collect the concentrated light by a concentrated light of 5 1285354. Finally, leave the surface light source device丨And for use by the liquid crystal panel. ° The same current, and according to -, the light intensity is similar; Second, the color is similar; Third, the forward (vf) voltage is similar, the measured parameters of the three similar frequencies of the city are selected, and classified (B in ) In order to meet the requirements of the LEDs of the respective color LEDs, the LED light bulbs in the red light (r) LEd light group 141, the green light (6) LED light group 142, and the blue light (8) LED light group 143 in the LED light group 14 can be reached. Before assembly, it is necessary to confirm whether the LEDs in the LED group are _ hiding, and the 戦 method is to turn on the white wire of the phase, that is, the white balance, therefore, the _ can be sewn The specification is required to be assembled according to the allowable difference values of the individual manufacturers, and the group is assembled into a LED light group 1 4 '俾 installed in the face light position! After that, you can provide the light source that it should have. However, due to factors such as weakness and instability after long-term use, it is often unsatisfactory that the light energy of a certain LED group in the LED lamp group 14 is poor, resulting in white light mixed by the entire LED lamp group 14, which cannot be satisfied. The preset white balance condition is extremely unfavorable for the subsequent application of the light source. After being assembled, even after it has been handed over to the general user, even if it is found that there is such a phenomenon, it is impossible to know which LED lamp group 14 has a problem, and which LED lamp group has a problem, and The product has long been designed to be modular, and there is no need to carry out related repairs and remedies. Therefore, how to correct the remedy in the LED light group 丄4 has been assembled in the light of the 1285354 ED lamp, and the source clothes are set to 1 after the 'Lin is not _ on the side of each of the ^, the round-out situation' and 'into- The result of the step-by-step approach is precisely the subject of the current goal. [Summary of the Invention] The main purpose of the present invention is to detect and feedback the miscellaneous supplies.

農置,其主要係藉由於面光源裝置中之LED燈組中之紅光LE D燈群、綠光L E D燈群、藍光L E D燈群各在串聯—檢測用[ E D至該裝置中’而使L E D燈組啟紐光時,可全程進行檢測, 並及時回授給予電流,贿L E D燈組確保光齡平衡之要求。 【實施方式】 為使貴審查委員能更易於了解本發明之裝置及所能達到的 功夕丈’絲配合圖式說明如下。 首先,清參閱圖二所示,本發明之L βd光能量檢測及回授 裝置2 ’係包含一光能量偵測器(〇pticai Energy Sensor) 2 1、 一電流轉換器(C/VConverter) 2 2、一訊號轉換器(A/DAnalog ToDigital) 2 3、一運算處理器(CPU) 2 4、一驅動器組(LED Driver IC) 2 5 〇 該光能量偵測器2 1,係具有數個光電晶體2 1 1、2 1 2、 2 13。 該電流轉換器2 2,係可將電流(電荷)轉換成電壓予以輸 1285354 該訊號轉換器2 3,係可將類比訊號轉換成數位訊號予以輸 出0 該運算處理器2 4,係預設有紅光、綠光、藍光混光後成為 白光光源達最佳白平衡狀態之各色光參數值,且具三組脈衝寬度 調變器(Pulse Width Modulation) 241、242、243, 藉由脈衝寬度調變器2 41、2 4 2、2 4 3可以分別改變電壓 輸出數值及頻率之控制功能。 該驅動器組2 5,係具有三個驅動ic251、252、2 5 3,藉由該驅動IC251、252、25 3接受運算處理器 21之指令,以進行電流調整執行。 本發明之L ED光能量檢測及回授裝置2於細時,係於面 光源裝置3中設置LED燈組4,該LED燈組4中之紅光LE D燈群41、綠光L ED燈群4 2、藍光L ED燈群4 3,係以 經由測試篩選過,而達各燈群中之LED燈泡為相同特性之標 準;再由紅光LED燈群4 1串聯-仍為相同特性之檢測贩光 LED燈411;由綠光LED燈群42串聯-仍為相同特性之 檢測用綠光L E D 4 21 ;由藍光L E D燈群4 3串聯—仍為相 同特性之檢_藍光LED43 1 ’將該等檢_紅光LED4 1 1、檢測用綠光LED421、檢測用藍光LED4 3丄連結 於光能量檢測器21,並使與其中之光電晶體2 i工、2丄/ 213相互匹配,而令光電晶體21丄、2丄2、2丄3,個別 1285354 可接受檢咖紅光Le 4 測用藍光LED4h / 測用綠光LED421、檢 12、213从!之光源,又該等光電晶體2n、2 量為基準,予以輪出體換Γ可依將接收到的光源中之光能 2、21化从山 由先電晶體211、21Agricultural equipment, mainly by the red light LE D lamp group, green LED lamp group and blue LED lamp group in the LED light group in the surface light source device are connected in series - detection [ED to the device] When the LED light group is turned on, it can be tested all the way, and the current is given back in time, and the LED light group ensures the balance of light age. [Embodiment] In order to make it easier for the reviewing committee to understand the device of the present invention and the achievable function of the figure, the following description is given. First, as shown in FIG. 2, the Lβd optical energy detecting and feedback device 2' of the present invention comprises a 能量pticai Energy Sensor 2 1 and a current converter (C/V Converter) 2 2, a signal converter (A / DAnalog ToDigital) 2 3, an arithmetic processor (CPU) 2 4, a driver group (LED Driver IC) 2 5 〇 the light energy detector 2 1, has several photoelectric Crystal 2 1 1 , 2 1 2, 2 13 The current converter 22 can convert the current (charge) into a voltage and input 1285354. The signal converter 23 can convert the analog signal into a digital signal to output 0. The operation processor 24 is pre-configured. Red, green, and blue light become the white light source to achieve the optimal white balance state of each color parameter value, and have three sets of Pulse Width Modulation (Pulse Width Modulation) 2411, 242, 243, by pulse width modulation The transformer 2 41, 2 4 2, 2 4 3 can change the control function of the voltage output value and frequency respectively. The driver group 25 has three drivers ic251, 252, and 253, and the driver ICs 251, 252, and 253 receive an instruction from the arithmetic processor 21 to perform current adjustment execution. In the fine time, the L ED light energy detecting and feedback device 2 of the present invention is provided with an LED lamp group 4 in the surface light source device 3, and the red light LE D lamp group 41 and the green light L ED lamp in the LED lamp group 4 Group 4 2, Blu-ray L ED lamp group 4 3, was selected through the test, and the LED bulbs in each lamp group have the same characteristics; and the red LED lamp group 4 1 is connected in series - still the same characteristics Detecting the light-emitting LED lamp 411; connecting the green LED lamp group 42 in series - still detecting the same characteristics of the green LED 4 21; connecting the blue LED lamp group 4 3 - still the same characteristic check _ blue LED 43 1 ' The detection_red LED 4 1 1 , the detection green LED 421, and the detection blue LED 4 3 丄 are connected to the optical energy detector 21, and the photoelectric crystals 2 and 2 213 are matched with each other. Photoelectric crystals 21丄, 2丄2, 2丄3, individual 1285354 can be checked for red light Le 4 for measuring blue LED4h / measuring green LED421, detecting 12, 213 from the light source, and the photoelectric crystal 2n, 2 The quantity is the reference, and the rotation of the wheel body can be changed according to the light energy in the received light source 2, 21 from the mountain first transistor 211, 21

D4U、檢=^流值,即可判定所匹配之檢測用紅光U 侧 2 光 LED421、酬嶋 LED431 X之光#不同值。而經由光電晶體2 U、2丄2、2 ^輸出不同值之電流,則經由電流轉換器2 2予以分別轉換成 j之電難’再經由訊號轉換器2 3之動作,將其原本為類比 轉換成為較仏應用之數位訊號,而以此數位訊號即可供給運 算處理器2 4作處理,接著,使驅動器組2 5中驅動χ c 2 5工、 2 5 2 2 5 3分別執行不同之電流值之輸出。 本發明之功能表現乃在於,檢測用紅光LED411、檢測D4U, check = ^ stream value, you can determine the matching red light U side 2 light LED421, reward LED431 X light # different values. The currents of different values are output via the photo-electric crystals 2 U, 2丄2, 2^, respectively, and converted into electrical difficulties by the current converter 2 2, and then through the action of the signal converter 2 3 , which is originally analogous The digital signal is converted into a digital signal, and the digital signal can be supplied to the arithmetic processor 24 for processing. Then, the driver group 25 drives the χ c 2 5 work and the 2 5 2 2 5 3 respectively. The output of the current value. The function of the present invention is that the detection of the red LED 411, detection

用、、杂光L E D 4 2 1、檢測用藍光l E D 4 3 1分別皆和L E D 燈組4中之紅光L E D燈群41、綠光L E D燈群4 2、藍光L· ED燈群4 3具相同之特性,且亦分別自紅光乙£:1)燈群4工、 綠光L E D燈群4 2、藍光L E D燈群4 3串聯至光能量檢測器 21中,故於光能量檢測器21中之檢測用紅光l E D 41 1、 檢測用綠光LED421、檢測用藍光LED4 31之開啟、關 閉及產生之光能量表現,即皆和丄E D燈組4之紅光L E D燈群 41、綠光L E D燈群42、監光LED燈群4 3完全相同,而 9 1285354 w達成取樣之準確性;是以,經由光能量檢測器2工中所匹配之 各光電晶體211、212、213接收不同之光能量後,即可 輪出不同之電流值,再由電流轉換器2 2轉換成各不同之電壓 j遂由讯#u轉換器2 3將此訊息提供給予運算處理器2 4作判 \而錢异處理器2 4巾’即預設有白光達最佳白平衡條件中 =光之各光能量參數值,—旦經、_讀比對後,該等 、,、、·!用、’〇:光LED41 1、檢測用綠光LED42丄、檢測用藍 光L E D 4 31中有任-輸出之光能量與運算處理器2 4中之預 。又參數值不同時’即可運算出其所需調整之補償值,再接由匹配 之脈衝寬度調整器2 41、2 4 2、2 4 3其中—單元或二單元 予以改變其電壓之數值及頻率而輸出,再令驅動器組2 5中相匹 配之驅動IC251、252、253相對應之單元,予以調整 電流而供給回授至LED燈組4所用。即達成led燈組4之光 能量檢測及回授功能,尤其LED燈組4一經啟動後,本發明即 可開始全程進行檢測及回授工作,以確保LED燈組4之光源達 白平衡之要求,而有利穩定於後續光源之利用。 紅上所述,本發明之L E D能量檢測及回授裝置,藉於面光 源裝置中之LED燈組中之紅光LED燈群、綠光Led燈群、 藍光LED燈群各在串聯一檢測用LED至該裝置中,而使 D燈組啟動發光時,可全程進行檢測,並及時回授給予電流,以 使L ED燈組確保光源白平衡之要求,顯已符合產業上之利用 1285354 性、新穎性及進步性之要件,爰依法提出發明之申請,祈請貴 審查委員之詳鑑,惠賜為准予專利之審定,至感德便。 【圖式簡單說明】 圖一係習知面光源裝置之立體分解圖。 圖二係習知面光源裝置之組合示意圖。 圖三係本創作LED能量檢測及回授裝置之流程圖。 【主要元件符號說明】 1面光源裝置 10導光板 101出光面 10 2反射面 10 3導光點 10 4入光面 1 1擴散元件 12聚光源件 13反射板 14 L ED燈組 141紅光L ED燈群 14 2綠光L ED燈群 14 3藍光LED燈群 2迴授裝置 21光能量偵測器 2 1 1、2 1 2、213光電晶體 2 2電流轉換器 2 3訊號轉換器 2 4運算處理器 2 5驅動器組 251、252、253驅動1〇 3面光源裝置 11 1285354 4 L E D燈組The use, the stray LED 4 2 1 , the detection blue light l ED 4 3 1 and the red LED light group 41 in the LED light group 4, the green LED light group 4 2, the blue light L· ED light group 4 3 Have the same characteristics, and also from the red light B: 1) the light group 4 work, the green LED light group 4 2, the blue LED light group 4 3 is connected in series to the light energy detector 21, so the light energy detector The red light l ED 41 for detection in 21, the green light LED 421 for detection, and the light energy performance of the detection blue LED 4 31 for opening, closing and generating, that is, the red LED group 41 of the ED lamp group 4, The green LED lamp group 42 and the monitor LED lamp group 4 3 are identical, and the 9 1285354 w achieves the accuracy of sampling; that is, the photocells 211, 212, 213 matched by the optical energy detector 2 are received. After different light energies, different current values can be rotated, and then converted into different voltages by the current converter 2, and the information is supplied to the arithmetic processor 2 by the signal converter 2 \And the money is different from the processor 2 4 towel's pre-set white light to the best white balance condition = the light energy parameter value of the light, after the _ reading , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , When the parameter values are different, the compensation value of the required adjustment can be calculated, and then the matched pulse width adjuster 2 41, 2 4 2, 2 4 3 - the unit or the second unit changes the value of the voltage and The frequency is output, and the cells corresponding to the matching drive ICs 251, 252, and 253 in the driver group 25 are adjusted to supply current and supplied to the LED lamp group 4. That is, the light energy detection and feedback function of the LED lamp group 4 is achieved. Especially after the LED lamp group 4 is started, the invention can start the detection and feedback work for the whole process to ensure the white light balance of the light source of the LED lamp group 4. It is advantageous to stabilize the use of subsequent light sources. According to the red, the LED energy detecting and feedback device of the present invention is used for detecting in series by the red LED lamp group, the green LED lamp group and the blue LED lamp group in the LED lamp group in the surface light source device. When the LED is in the device, when the D lamp group starts to emit light, the whole process can be detected, and the current is given back in time, so that the L ED lamp group can ensure the white balance of the light source, which is consistent with the industrial use of 1285354, The requirements of novelty and progressiveness, the application for invention according to law, the detailed examination of the reviewing committee, and the granting of the patent to the approval of the patent. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a conventional surface light source device. Figure 2 is a schematic diagram of the combination of conventional surface light source devices. Figure 3 is a flow chart of the LED energy detection and feedback device of the present invention. [Main component symbol description] 1 surface light source device 10 light guide plate 101 light emitting surface 10 2 reflecting surface 10 3 light guiding point 10 4 light incident surface 1 1 diffusing element 12 light source member 13 reflecting plate 14 L ED light group 141 red light L ED light group 14 2 green light L ED light group 14 3 blue light LED group 2 feedback device 21 light energy detector 2 1 1 , 2 1 2, 213 photoelectric crystal 2 2 current converter 2 3 signal converter 2 4 Operation processor 25 driver group 251, 252, 253 drives 1〇3 surface light source device 11 1285354 4 LED light group

41紅光LED燈群 41 1檢測用紅光L ED 4 2綠光L ED燈群 421檢測用綠光LED 43藍光LED燈群 431檢測用藍光LED 1241 red LED light group 41 1 detection red light L ED 4 2 green light L ED light group 421 detection green light LED 43 blue LED light group 431 detection blue LED 12

Claims (1)

1285354 " 十、申請專利範圍: -種L E D能量檢測及回授裝置,包括有:—光能量檢測器、 -電流轉換H、-訊號轉換器、—運算處理器及―驅動器組所組 成’藉由L E D燈組中之紅光L E D燈群、綠光L E D燈群、藍 光LED燈群中各串聯-檢咖LED至光能量檢測器中,而由 光能量檢測H中之各光電晶體扣接受其光源,並依其不同光源 產生之不同光能量各輸出不同之電流值給予電流雛器,再經將 電流轉換成電壓給予訊號轉換器,使之由類比訊號轉換成數位訊 號,而供運异處理器進行比對運算,接著由運算處理器中之脈衝 寬度調整器改變電壓值及其頻率,而由驅動器組中之驅動電路將 所需之電流予以回授至LED燈組中,以完成面光源裝置中le D燈組光能量之檢測及回授。 13 1285354 七、指定代表圖: (一) 本案指定代表圖為:第(三)圖。 (二) 本代表圖之元件符號簡單說明: 2迴授裝置 21光能量偵測器 21 1、212、213光電晶體 2 2電流轉換器 2 3訊號轉換器 2 4運算處理器 2 5驅動器組 2 51、2 5 2、2 5 3驅動IC 3面光源裝置 4 LED燈組 41紅光LED燈群 411檢測用紅光LED 42綠光LED燈群 4 21檢測用綠光L E D 4 3藍光LED燈群 4 31檢測用藍光LED 八、本案若有化學式時,請揭示最能顯示發明特徵的化學式:1285354 " X. Patent application scope: - A kind of LED energy detection and feedback device, including: - light energy detector, - current conversion H, - signal converter, - arithmetic processor and "driver group" The red-light LED lamp group, the green LED lamp group, and the blue LED lamp group in the LED lamp group are respectively connected to the LED-to-light energy detector, and each photo-crystal buckle in the photo-energy detection H receives the photo-electric crystal button The light source, according to the different light energy generated by different light sources, outputs different current values to the current device, and then converts the current into a voltage to give the signal converter, so that the analog signal is converted into a digital signal, and the different processing is performed. The comparator performs the comparison operation, and then the pulse width adjuster in the operation processor changes the voltage value and its frequency, and the driving circuit in the driver group returns the required current to the LED lamp group to complete the surface light source. Detection and feedback of light energy of the LED lamp set in the device. 13 1285354 VII. Designated representative map: (1) The representative representative of the case is: (3). (2) Brief description of the component symbols of the representative diagram: 2 feedback device 21 optical energy detector 21 1, 212, 213 photoelectric crystal 2 2 current converter 2 3 signal converter 2 4 arithmetic processor 2 5 driver group 2 51, 2 5 2, 2 5 3 driver IC 3 surface light source device 4 LED light group 41 red light LED group 411 detection red LED 42 green LED light group 4 21 detection green LED 4 3 blue LED group 4 31 Blue LED for detection VIII. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention:
TW93121787A 2004-07-21 2004-07-21 Device for detecting the energy of LED light sources and its feedback device TWI285354B (en)

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