WO2011010774A1 - Appareil d'éclairage utilisant des diodes électroluminescentes - Google Patents

Appareil d'éclairage utilisant des diodes électroluminescentes Download PDF

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Publication number
WO2011010774A1
WO2011010774A1 PCT/KR2009/005334 KR2009005334W WO2011010774A1 WO 2011010774 A1 WO2011010774 A1 WO 2011010774A1 KR 2009005334 W KR2009005334 W KR 2009005334W WO 2011010774 A1 WO2011010774 A1 WO 2011010774A1
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WIPO (PCT)
Prior art keywords
led
array
series
group
groups
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PCT/KR2009/005334
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English (en)
Korean (ko)
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김영환
김민균
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(주)로그인디지탈
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Publication of WO2011010774A1 publication Critical patent/WO2011010774A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to a lighting device using a light emitting diode (hereinafter referred to as LED), and more particularly to a light emitting diode lighting device having high efficiency, high range and low harmonic characteristics in a wide input voltage range.
  • LED light emitting diode
  • the current control method for sensing a current to flow a constant current is one of the widely used method.
  • SMPS switching mode power supply
  • the most significant factor in the power concept is an indication of how much effective apparent power is consumed, which can be expressed as the ratio of the apparent power to the actual active power.
  • the ratio of the apparent power to the actual active power As part of the smart grid, it is essential to the global trend to drastically reduce energy loss and energy consumption through efficient energy management.
  • the LED lighting KS certification standard KSC7656 is as follows.
  • Equation 1 Actual power consumption is the product of average instantaneous voltage and instantaneous current
  • Equation 2 Apparent power is simply the root-mean-square voltage and current
  • Equation 3 The inverse is usually expressed as a percentage and the ratio between R
  • Equation 4 Apparent power at inductive impedance
  • ⁇ is a phase shift and is directly induced by impedance as shown in Equation 5.
  • ⁇ KS certification standard 0.9 or more (0.85 or less for 5W)
  • PFC Power Factor Correction
  • the method of driving the LED in outputting light by flowing a current to the LED is There are various methods, such as driving with voltage or current, linear or switching method depending on switching.
  • FIG. 1 is a circuit diagram illustrating an LED driving method using a series resistor as one commonly used.
  • the current flowing through the LED is a voltage driven method determined by the applied voltage (Vi) and the resistance (R) value connected in series with the LED.
  • Vi applied voltage
  • R resistance
  • FIG. 2 is a circuit diagram illustrating an LED driving method using an active device. It represents a driving furnace using a variable voltage source or a current source to control the current flowing in the LED device.
  • the method of using a variable voltage source or a current source is similar in principle and uses a linear method or a switching method for voltage or current. Adjust it.
  • FIG. 3 is a diagram illustrating a current controlled LED driving furnace using a series voltage controlled regulator.
  • the current flowing through the LED is controlled by the transistor (TR) and an operational amplifier.
  • the current flowing through the LED is controlled by feeding back the voltage applied to the sense resistor (RSENSE).
  • RENSE sense resistor
  • FIG. 4 is a diagram illustrating a current controlled LED driving circuit using a switching regulator. It shows the structure that the current flowing through the LED is controlled by the switching furnace and the operational amplifier. The current flowing through the LED is adjusted by feeding back the voltage applied to the sense resistor (RSENSE). Unlike the linear method described above, since the switching method is used, power consumption in the switching block is reduced, so that the electrical effect is increased. Therefore, the switching method is widely used when relatively large power is consumed.
  • the current-controlled LED driving circuit using the switching regulator has to apply a switching regulator, which complicates the circuit and requires an inductor capacitor constituting the switching regulator. In this case, there is a problem that there is a risk of degradation of the effect.
  • the present invention has been made to solve the above-mentioned conventional problems, and the power efficiency, inverse and THD (Total Harmonic) can be simplified without the complexity of the structure of the conventional method and the use of capacitors, inductors, and power factor correction (PFC) ICs. It is an object of the present invention to provide a light emitting diode illumination device capable of improving and increasing distortion.
  • the present invention employs a structure that changes the connection to the LED white according to the input voltage, by maintaining a constant overall average power by controlling the current according to the wide input voltage range supplied to the LED, the output power with respect to the power supply LED lighting that maximizes the effect by maximizing the efficiency and satisfies the THD specification by improving the efficiency by switching the LED array according to the input voltage level without using an IC such as PFC.
  • Another purpose is to provide a device.
  • the light emitting diode lighting apparatus is connected in parallel to an AC power supply, grouped into a plurality of LED groups consisting of at least one LED, and the plurality of LED groups are arranged in series.
  • a LED array having tabs formed at the cathode terminals of the last LED group between each LED group;
  • a reference voltage source for generating a reference voltage; It is connected between each tab of the LED array, and comprises a switching unit for controlling the peak current for each LED group based on a reference voltage in accordance with the increase and decrease of the AC input voltage.
  • the constant current source connected in parallel to the AC power source; It may further include a power compensation unit connected in parallel to the AC power supply for compensating that the output power of the LED array does not increase.
  • the switching unit and at least one switch connected in parallel between each tap and in series with each other; It is installed in correspondence with each switch to control the switching of each switch receiving the reference voltage from the reference voltage source to the non-inverting terminal (+) and the voltage of the lower map to the inverting input terminal (-). Is configured to include a comparator.
  • the comparator receives a reference voltage from the reference voltage source as a non-inverting terminal (+), receives a voltage of a lower tap as an inverting input terminal (-), and uses a voltage input to the inverting input terminal (_) as a reference. If the voltage is lower than the voltage, the switch controls the switch to be on (closed state), while if the voltage input to the inverting input terminal (-) is higher than the reference voltage, the switch is turned off (open). Switching control.
  • the array structure of the LED group constituting the LED array is arranged by arraying dozens of LED chip die (Die) in one 3 ⁇ 4 LED module, and a plurality of LEDs in the array as a group n (where n An array that divides into> 2) LED groups, forming a pattern so that adjacent LEDs belong to different groups, and making the necessary (n— 1) tabs (where the last n-th tap is the cathode terminal) and connecting them to the outside A structure can be used.
  • the array structure of the LED group constituting the LED array, the array of dozens of LED chip die in one LED mode in series, n groups of LEDs in a series of a plurality of LEDs as a group Form a pattern so that adjacent LEDs belong to different groups, and make the necessary (n-1) tabs (where the last n-th tap is the cathode terminal) and the anode and cathode terminals to connect to the outside It may be an array structure.
  • the array structure of the LED group constituting the LED array, the array of dozens of LED chip die in a single LED module in series, and the series array in a plurality of parallel, a plurality of LEDs in each serial array As a group and divide into n LED groups, t forming a pattern so that adjacent LEDs belong to different groups, and the necessary (n-1) interest tabs (where the last n-th tap is the cathode terminal) and the anode terminals.
  • the array structure of the LED group constituting the LED array is arrayed in series using a plurality of general-purpose LED modules consisting of only one LED chip, and the plurality of LED modules in the serial LED module array as a group By dividing into n (where n> 2) LED groups, forming a pattern so that adjacent LED modules belong to different groups, and (n-1) tabs where n is the last tap, the cathode terminal ) And an anode and cathode terminals can be used to configure the arrangement.
  • the array structure of the LED group constituting the LED array is arrayed in series using a plurality of general-purpose LED modules consisting of only one LED chip, and the serial LED module array is configured in plural in parallel, each series within a LED module array, a plurality of LED modules are divided into a group of lower n (where n> 2) LEDs in a group, forming a pattern so that adjacent LEDs belong to different groups and having the necessary ( ⁇ - ⁇ tabs). (Where the last tap, ⁇ -th pin is the cathode terminal), and an array structure configured to make and connect the anode terminal and the cathode terminal.
  • the array structure of the LED group constituting the LED array is arranged in series using a plurality of general-purpose LED modules in which a plurality of LED chips are built in series and only the anode terminal and the cathode terminal are formed outside, and the series LEDs Within a module array, divide a group of LED modules into a group of n (here n> 2) LED modules, forming a pattern so that adjacent LED modules belong to different groups and (n-1) It is possible to use an array structure configured to make and connect four tabs (where the last tab, the nth tap is a cathode terminal), and an anode terminal and a cathode terminal.
  • the array structure of the LED group constituting the LED array is arranged in series using dozens of existing LED modules z- plural LED chips are built in series and only the anode terminal and the cathode terminal are formed externally, It consists of a plurality of LED module arrays in parallel and divides the plurality of LED modules into a group of n (here n> 2) LEDs in a series within each serial LED module array, and adjacent LED modules belong to different groups. It is possible to use an array structure configured to form a pattern so as to form and connect the necessary (n-1) tabs (where the last tap, the nth wrap is a cathode terminal), and an anode terminal and a cathode terminal.
  • the array structure of the LED group constituting the LED array is a plurality of LED chips are built in parallel and arrayed in series using dozens of existing LED modules formed on the outside of the anode terminal and cathode self for each LED chip, Configure a series of LED arrays in parallel, divide each LED module into a group of n (here n> 2) LEDs within each series of LED arrays, and adjacent LED modules in different groups. It is possible to use an arrangement structure formed by forming a pattern so as to belong to and forming and connecting the necessary (n-1) tabs (where the last tap, the nth tap is a cathode terminal), and an anode terminal and a cathode terminal. [Brief Description of Drawings]
  • 1 is a view showing a LED driving circuit using a conventional series resistor.
  • 2 is a view showing a LED driving furnace using a conventional active element.
  • 3 is a diagram illustrating a current-controlled LED drive path using a conventional series voltage controlled regulator.
  • FIG. 5 is a diagram illustrating a circuit configuration of a light emitting diode lighting apparatus having high efficiency, high power factor, and low harmonic characteristics in a wide input voltage range according to an exemplary embodiment of the present invention.
  • FIG. 6 is a view showing an example of the arrangement structure of the LED group applied to the LED lighting apparatus according to the present invention.
  • FIG. 7 to 13 are diagrams showing an example of the LED group arrangement structure of the LED array applied to the LED lighting apparatus according to the present invention, respectively.
  • FIG. 14 is a diagram illustrating a representative input voltage versus input current characteristic for the configuration of FIG. 5.
  • FIG. 15 is a diagram showing harmonic component characteristics at an input voltage of rmsl98V for the configuration of FIG. 5.
  • 16 is a diagram illustrating harmonic component characteristics at an input voltage of rais 220V for the configuration of FIG. 5.
  • FIG. 17 is a diagram showing harmonic component characteristics at an input voltage of rms 242V for the configuration of FIG. 5.
  • FIG. 5 is a view showing a light emitting diode lighting apparatus according to a preferred embodiment of the present invention.
  • the LED array 20 is grouped into a plurality of LED groups G1, G2, G3, G4 consisting of at least one LED, t between each LED group G1, G2, G3, G4 and the last LED group G4. Taps T1, T2, T3, and T4 are formed at the output terminal (cathode terminal) of the
  • It consists of a comparator ( ⁇ ⁇ 2, ⁇ 3) for switching control of (SW1, SW2, SW3).
  • the comparator OP1 receives the reference voltage as the non-inverting terminal (+), receives the voltage of the lower tap-in tap as the inverting input terminal (-), and the voltage input to the inverting input terminal (-) is lower than the reference voltage.
  • the switch SW1 which is connected in parallel between the tap T1 and the tap T4, ie, between the second LED group G2, switches to control the switch SW1 to be on, while the inverting input terminal (-) When the input voltage is higher than the reference voltage, the switching control SW1 is turned off.
  • the comparator OP2 receives the reference voltage as the non-inverting terminal (+), receives the voltage of the lower tap T3 as the inverting input terminal (-), and inputs the voltage as the inverting input terminal (-). If the voltage is lower than the reference voltage, the switch SW2 connected in parallel between the tap T2 and the tap T3 (that is, between the third LED group G3) is controlled to be switched on. When the voltage input to the inverting input terminal (-) becomes higher than the reference voltage, the switching control is performed such that the switch SW2 is turned off.
  • the comparator OP3 receives the reference voltage as the non-inverting terminal (+), receives the voltage of the lower tap T4 as the inverting input terminal (-), and inputs the voltage as the inverting input terminal (-). If it is lower than the reference voltage, the switching control so that the switch SW3 connected in parallel between the tap T3 and the tap T4 (cathode terminal) [i.e. between the fourth LED group G4] is turned on. On the other hand, when the voltage input to the inverting input terminal (-) is higher than the reference voltage, the switching control so that the switch (SW3) is off (Off).
  • the LED group may be composed of two or more.
  • the number of taps is also (n-1) (where the nth tap, the last tap is the cathode terminal), and the switch and comparator are (n-1)
  • the dog may be easily understood by those skilled in the art.
  • the switches SW1 and SW2 are turned off (that is, the open state) and the switch SW3 is turned on. State (i.e., close state), so that the current path flows through the first LED group (Gl), the second LED group (G2), the third group (G3), and the switch (SW3).
  • the second, third and third LED groups G1, G2, and G3 emit light.
  • the switches SW1, SW2, and SW3 are turned off (that is, the open state), and accordingly the current
  • the path flows through the first LED group (Gl), the second LED group (G2), the third group (G3), and the fourth LED group (G4), so the first, second, third and fourth LED groups (Gl t G2, G3, G4) emit light.
  • the switch SW3 is turned on (i.e., the closed state) and the switches SW1 and SW2 are turned off. (Off) state (i.e. open state), so that the current path flows through the first LED group (Gl), the second LED group (G2), the third group (G3), and the switch (SW3). Therefore, the first, second and third LED groups (G1, G2, G3) emit light.
  • the switch SW3 ⁇ 4SW3 is turned on (ie, closed) and the switch SW1 is turned off. (I.e., open state), so that the current path will turn on the first LED group (Gl), the second LED group (G2), the switch (SW2) and the switch (SW3). As it flows through, the first and second LED groups G1 and G2 emit light. Subsequently, when the AC input voltage is further reduced so that the voltage of the tap T2 becomes less than the reference voltage, the switches SW1, SW2, and SW3 are turned on (i.e., closed). The current path flows through the first LED group (G1) and the switches (SW1, SW3 ⁇ 4SW3) so only the first LED group (G1, G2) emits light.
  • the LED group is turned on and off in turn using (n-1) maps (where the last tap, the nth tap is the cathode terminal) per cycle of the AC input power, to increase or decrease the AC input voltage. Accordingly, by effectively controlling the peak current of each LED array, the power factor can be maximized by minimizing the phase shift of harmonic components and currents generated during switching.
  • This structure can be freely designed and changed the number of (n-1) taps (where the nth tap, the last tap is the cathode terminal), the number of LED groups and the number of LEDs in the LED group, the performance of the existing LED lighting equipment And measurement specifications.
  • this sequential LED array switching method may feel a slight difference in light brightness for one cycle of about 8.33 ms (120 hz) due to the difference in LED array lighting time of each group. This possibility can be minimized by effectively arranging groups of LED arrays that are turned on / off to compensate for this disadvantage.
  • the present invention proposes an array structure of LED groups as follows.
  • ⁇ in the first arrangement of LED groups, a custom (Custom) as to modeul screen, an array of dozens of LED chip die (Die) in one LED modeul, and a group of a plurality of LED in the array, Divide into n groups of LEDs, forming a pattern so that adjacent LEDs belong to different groups, and (n-1) tabs ( ⁇ ⁇ -l) where the last map is the cathode terminal. It is an array structure that is made and connected to the outside.
  • FIG. 6 dozens of LED chip dies are arrayed in series in one LED module, and a plurality of LEDs are grouped into four LED groups in the serial array. , Formed so that adjacent LEDs belong to different groups, and made three necessary taps ( ⁇ 3) (where the fourth tap, the last tap is a cathode terminal), an anode terminal and a cathode terminal to connect to the outside This is shown by way of example.
  • 1, 2, 3, and 4 represent LED groups.
  • FIG. 7 dozens of LED chip dies are arranged in series in one LED mode, and the series arrays are configured in plural in parallel. Divide the LEDs into groups of four LEDs, forming a pattern so that adjacent LEDs belong to different groups, and the required three taps ( ⁇ 3) (where the last tap, the fourth tap is the cathode terminal) and the anode
  • ⁇ 3 where the last tap, the fourth tap is the cathode terminal
  • An example configuration is shown in which terminals and cathode terminals are made and connected to the outside.
  • 1, 2, 3, and 4 represent LED groups.
  • the second LED group arrangement structure using a general-purpose LED module that has at least one LED die built-in, the first LED of any one of the LED chip die in the LED module when the module is placed and designed It is connected to the group, and the other is assigned to the second LED group is an array structure for connecting each LED chip in one LED module to another LED group.
  • 1, 2, 3, and 4 represent LED groups.
  • arrays are arranged in series using dozens of existing LED modules consisting of only one LED chip, and a plurality of LED modules are grouped in the serial LED module array.
  • the configuration consists of three LED groups, forming a pattern so that adjacent LED modules belong to different groups, and creating the necessary three taps ( ⁇ 3) (where the fourth tap, the last tap is a cathode terminal), and an anode terminal and a cathode terminal. It is shown as an illustration.
  • 1, 3, and 4 represent LED groups.
  • an array structure such as an diffuser
  • FIG. 9 dozens of existing LED modules consisting of only one LED chip are arrayed in series, and the serial LED module arrays are configured in parallel, and each serial LED module array is arranged.
  • a plurality of LED modules are divided into four LED groups, An example is shown in which a pattern is formed so that adjacent LEDs belong to different groups, and the required three taps ( ⁇ 1 to ⁇ 3) (where the last tap, the fourth map is a cathode terminal), an anode terminal, and a cathode terminal are illustrated.
  • 1, 2, 3, and 4 represent LED groups.
  • a plurality of LED chips are built in series, and only the anode terminal and the cathode terminal are arrayed in series using dozens of existing LED modules formed outside, and the series LED modules Divide the LED modules into groups of four LED modules within an array, forming a pattern so that adjacent LED modules belong to different groups, and the required three tabs ( ⁇ 1 to ⁇ 3), where the last tab is the fourth
  • the map is a cathode terminal) and a configuration for making the anode terminal and the cathode terminal is exemplarily shown.
  • 1, 2, 3, and 4 represent LED groups.
  • a plurality of LED chips are built in series, and only the anode terminal and the cathode terminal are arrayed in series using dozens of existing LED modules formed outside, and the series LED modules
  • the array consists of a plurality of parallel, each of the series LED module in the array of a plurality of LED modules in a group of four LED groups, the pattern is formed so that adjacent LED modules belong to different groups, and the three required Exemplary configurations are shown for the tap ( ⁇ 3) (where the last tap, the fourth tap is the cathode terminal) and the anode terminal and the cathode terminal.
  • 1, 2, 3, and 4 represent LED groups.
  • a plurality of LED chips are built in parallel and arrayed in series using dozens of existing LED modules in which an anode terminal and a cathode terminal are formed outside for each LED chip.
  • multiple LED modules are grouped into four LED module groups, patterned so that adjacent LED modules belong to different groups, and the required three taps ( ⁇ 3) (where the last tab is the fourth The tab is a cathode terminal) and the configuration in which the anode terminal and the cathode terminal are made is exemplarily shown.
  • 1, 2, 3, and 4 represent LED groups.
  • a plurality of LED chips are built in parallel and arrayed in series using dozens of existing LED modules in which an anode terminal and a cathode terminal are formed outside for each LED chip.
  • Configure a series of parallel LED module arrays in parallel divide each LED module into a group of 4 LEDs into a group of 4 LEDs within each serial LED module array, form a pattern so that adjacent LED modules belong to different groups, and Exemplary configurations of three tabs ( ⁇ 3) (where the last tap, the fourth tap is the cathode terminal) and the anode terminal and the cathode terminal are shown.
  • 1, 2, 3, and 4 represent LED groups.
  • the above-described structural arrangement can eliminate the difference in brightness that may occur in the application of the driving circuit according to the present invention by minimizing the physical distance of the LED light emitting position according to the proposed sequential LED flashing.
  • the LED driving furnace according to the present invention can eliminate the disadvantages of the device or circuit for controlling the current flowing through the LED because the number of LEDs connected in series is changed according to the size of the input voltage. . That is, the effect of the power consumed by the transistor TR in the structure of FIG. 3 can be prevented from being lowered, and the use of an inductor or a capacitor in the switching unit shown in FIG. 4, radiation of high frequency switching noise, etc. It can eliminate the disadvantages.
  • the LED driving furnace according to the present invention can satisfy each harmonic specification shown in Table 1 and Table 2 above, and in the case of Power Factor, the power factor is 0.98 or more within 10% of the input voltage variation. @ Fully satisfy the specification of luminaire above 25W.
  • the average output power, or electrical efficiency, of the input power for each LED array is about 80%, which is 80 to 90% of the efficiency of the Switching Mode Power Supply (SMPS) compared to conventional LED driving furnaces.
  • SMPS Switching Mode Power Supply
  • FIG. 14 shows representative input voltage versus input current characteristics for the configuration of FIG. This is a drawing.
  • the figure shows the current change according to the actual input voltage. It can be seen that the higher the input voltage is, the more the current changes due to the influence of the compensation circuit to keep the average power consumption constant. It can be seen that by controlling the current switching by the switching part of 5, the power factor and harmonic content can be improved.
  • FIG. 15 is a diagram showing harmonic component characteristics at an input voltage of rmsl98V for the configuration of FIG. 5;
  • FIG. 16 is a diagram showing harmonic component characteristics at an input voltage of rms 220V for the configuration of FIG. Is a diagram showing the harmonic component characteristics at an input voltage of rms 242V for the configuration of FIG.
  • Table 3 shows a comparison of the harmonic characteristics test for the configuration of FIG.
  • FIG. 18 is a diagram illustrating input power versus output power characteristics (efficiency) for the configuration of FIG. 5.
  • FIG. 18 shows the effect of the configuration of FIG. 5 and shows that the average efficiency of input power to power consumption can be normalized to obtain an average efficiency of 80% or more within a 10% RMS input voltage range.
  • the present invention it is possible to easily improve and increase power efficiency, inverse, and THD without the complexity of the circuit structure and the use of capacitors, inductors, and PFC ICs.
  • the overall average power is kept constant by controlling the current according to the wide input voltage range supplied to the LED, maximizing the output power with respect to the supply power, maximizing the efficiency, and without using an IC such as a separate PFC.
  • By switching the LED array efficiently according to the level of the input voltage it is possible to meet the revolutionary power factor improvement and THD specification.
  • by adopting the arrangement structure of the LED group constituting the LED array according to the present invention by minimizing the physical distance of the LED light emitting position according to the sequential LED lighting brightness difference that may occur when applying the driving circuit according to the present invention Can be eliminated.
  • the present invention configured as described above, it is possible to easily improve and increase power efficiency, power factor and THD without the complexity of the circuit structure, capacitors, inductors, and PFC ICs.
  • the overall average power is kept constant by controlling the current according to the wide input voltage range supplied to the LED, maximizing the output power by maximizing the output power with respect to the supply power, and without using an IC such as a separate PFC.

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Abstract

La présente invention concerne un appareil d'éclairage utilisant des diodes électroluminescentes. Ledit appareil comprend : un réseau de DEL connecté en parallèle à une source d'alimentation CA et groupé en une pluralité de groupes de DEL comprenant au moins une DEL et dans lequel les groupes de DEL sont placés en série et un trou taraudé est formé entre un groupe de DEL et un autre groupe de DEL et dans une borne de cathode du dernier groupe de DEL ; une source de tension de référence permettant de générer une tension de référence ; et une unité de commutation permettant de commander efficacement un courant de crête dans chaque groupe de DEL sur la base de la tension de référence en fonction d'une augmentation et d'une baisse de la tension d'entrée CA. L'invention concerne l'appareil d'éclairage qui utilise les diodes électroluminescentes présentant des caractéristiques de grande efficacité, un facteur de puissance élevé et une harmonique faible dans une large plage de tensions d'entrée.
PCT/KR2009/005334 2009-07-23 2009-09-18 Appareil d'éclairage utilisant des diodes électroluminescentes WO2011010774A1 (fr)

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KR10-2009-0067163 2009-07-23
KR1020090067163A KR100942234B1 (ko) 2009-07-23 2009-07-23 발광다이오드 조명장치

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