Led light source

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting engineering. A light-emitting diode light source (100) consists of an array (110) of red LEDs, an array (120) of blue LEDs covered with a luminophor, a colour point from mixed light coming from the array (120) of blue LEDs covered with the luminophor is within the limit range of a quadrangle of CIE chromaticity diagram, where coordinates of the quadrangle apexes are (0.375, 0.427), (0.390, 0.456), (0.366, 0.430), (0.38, 0.46) respectively, at that LEDs transient temperature for the array (120) of blue LEDs covered with the luminophor and array (110) of red LEDs is practically equal to room temperature and the ratio of lumen output of the array (120) of blue LEDs covered with the luminophor in regard to lumen output of the array (110) of red LEDs varies within the range of 4:1 up to 1.5:1.

EFFECT: increased efficiency of emitted warm white light.

10 cl, 4 dwg

 

The technical field of the INVENTION

The present invention relates generally to lighting technology, and more specifically to light-emitting diode (LED) light sources.

The LEVEL of TECHNOLOGY

In the field of LED light source warm white has color temperature from 2700K to 3000K (abbreviated "2700/3000K" in the following paragraphs) can be obtained from mixing of blue light, yellow/green light and a huge number of red light. In one approach, using a coating of nitride red fluorescent powder and a phosphor, for example, called upon garnet (YAG) on gallium nitride (GaN) blue LED chips, for example, warm white light can be produced from the mixing of yellow/green light and red light, which is generated by activated nitride red fluorescent phosphor powder and a portion of blue light emitted from the blue LED, with the unabsorbed blue light that passes through the nitride red fluorescent powder and the phosphor. However, this approach may occur a large proportion of serious losses in the transition from blue to red, and therefore the luminous efficiency of this type warm white LED light sources is low.

With the aim of improving the luminous efficacy warm white LED light sources in another approach warm white LED light source can be constructed with pomoshnikova array coated with phosphor blue LED, for example, the array is covered with a YAG laser based on GaN blue LED, with an array of red LEDs, such as LED array called upon gallium phosphide (AlInGaP). Compared with the previous approach, consisting in the transition of blue light in red, luminous efficiency of this approach is much higher, as an array of red LEDs directly emits red light, and the mixed quality warm white light above.

However, since the blue LED has a different temperature dependence of the output lumens compared to the red LED, the drop in lumens red LED is significantly stronger than the blue LED at the increase of the transition temperature. Thus, when the LED light source works, that is, the transition temperature is high, the color dot of warm white light mixed from a cold white light emitted from the array of phosphor blue LED, and red light emitted from the array of red LEDs, can be displaced. When the color point is shifted from 5 Macadam ellipses from the color temperature 2700/3000K in place of a blackbody, the viewer can observe that the color warm white light source more green or red.

Usually, when the LED light source in working condition, and if the ratio of the lumens output of the array is coated with phosphor blue LED to the lumens output of the array of red LEDs inside di�range of from 4.8:1 to 3.8:1, color dot of warm white light mixed from a cold white light emitted by the array of phosphor blue LED, and red light emitted from the array of red LEDs, may be within 5 Macadam ellipses from the color temperature 2700/3000K in place of a black body.

Usually, warm white LED light source is formed using the layout of the array is coated with phosphor blue LED with an array of red LEDs, controlled two-channel controller. In addition to the two-channel control device of a lighting system having an LED light source, usually in addition is equipped with a temperature sensor. When the LED light source in the operating condition, the temperature sensor measures the temperature of the LED array and sends information about the temperature of the dual-channel control device. Based on the received information about the temperature, dual control device regulates the current supplied to the array of phosphor blue LED array and the red LED, respectively, thus the ratio of lumens output remains in the range from 4.8:1 to 3.8:1

Warm white LED light source, controlled two-channel control device, can give the assurance that the ratio of the lumens output of the array is coated with phosphor blue LED � the lumens output of the array of red LEDs is within the range from 4.8:1 to 3.8:1 in the process of his work, however, since this type of adaptable LED lighting systems include temperature sensors and two-channel control device, it is complex in structure and the cost is higher.

Summary of the INVENTION

To simplify the design and reduce the cost will be preferable to use a single control device to control the array of phosphor blue LEDs and an array of red LEDs, that is, the array is coated with phosphor blue LEDs and an array of red LEDs is controlled by the same force of the current.

For better connection with the above problem in one of the embodiments of the present invention represented by the led light source. The light source contains:

an array of red LEDs;

an array of phosphor-blue LEDs, the color point of the mixed light from the array of phosphor-LEDs blue, enters the quadrangle diagrams CIE chromaticity, coordinates of the four vertices of the quadrilateral are: (0,375, 0,427), (0,390, 0,456), (0,366, 0,430), (0,38, 0,46);

when the junction temperature of the LEDs of the array are coated with phosphor blue LEDs and an array of red LEDs is almost equal to room temperature, the ratio of the lumens output of the array is coated with phosphor blue light�of iodine relative to the lumens output of the array of red LEDs is in the range from 4:1 to 1.5:1.

According to the embodiment of the led when the light source is in working condition, that is, the junction temperature of the LEDs of the array are covered with phosphor blue LEDs and LEDs of the array of red LEDs, for example, is between 70°C and 100°C, and the ratio of the lumens output of the array is coated with phosphor blue LEDs to the lumens output of the array of red LEDs can be in the range from 4.8:1 to 3.8:1, so that color dot of warm white light mixed from a cold white light emitted from the array of phosphor-LEDs blue and red light, emitted from the array of red LEDs, may be within 5 Macadam ellipses from the color temperature 2700/3000K in place of a blackbody, thus, the quality of the warm white light emitted by the led light source, effectively improved.

Mainly, the quantitative ratio and/or the ratio of the areas of the LEDs of the array are covered with phosphor blue LEDs to the LEDs of the array of red LEDs is adjusted so that the output lumens of the array is coated with phosphor blue LEDs in relation to the array of red LEDs is in the range from 4:1 to 1.5:1.

Advantageously, the component ratio and/or the grain size of Liu�of infora configured that the color point of the mixed light from the array of phosphor-LEDs, enters the quadrangle.

Advantageously, the wavelength of the peak radiation of the array is coated with phosphor blue LEDs installed within the range of from 440 nm to 460 nm. Advantageously, an array of blue LEDs is an array of blue LEDs based on gallium nitride.

Advantageously, the wavelength of emission peak of the array (110) red LEDs installed within the range of from 600 nm to 620 nm. Advantageously, an array of red LEDs is an array of AlInGaP LEDs.

Advantageously, the phosphor contains a YAG or TAG.

According to another embodiment of the present invention is presented a lighting device. A lighting device includes a single control unit and any of the led light sources described above, wherein the led light source is controlled by a single controlling device.

BRIEF description of the DRAWINGS

For a more complete understanding of the present invention and its advantages, reference is made to the description in conjunction with the accompanying drawings, in which:

Fig.1 is a schematic view of a led light source 100 according to the embodiment of the present invention;

Fig.3 is a chromaticity diagram according to CIE embodiment of the present invention;

Fig.4 shows the appearance of the alleged LEDs led light source 100 according to the embodiment of the present invention.

The corresponding numbers and symbols in different figures mainly refer to corresponding parts unless otherwise indicated.

DETAILED DESCRIPTION of ILLUSTRATIVE embodiments of

Embodiments of the present invention described in detail hereinafter with reference to the accompanying drawings.

Fig.1 is a schematic view of a led light source 100 according to the embodiment of the present invention.

Fig.2 is a schematic view of the lighting device 10 according to the embodiment of the present invention. A lighting device 10 includes a single control device 200 and the led light source 100 of Fig.1.

As shown in Fig.1 and 2, the led light source 100 of the light 110 contains an array of red LEDs, and the led array 120 is covered with phosphor blue LEDs. An array of red LEDs 110 may include one or more red LEDs, and in a similar way array 120 blue LEDs may include one or more red LEDs.

In �the Ariant implementation of the wavelength of the peak radiation of the array 120 are covered with phosphor blue LEDs installed within the range of from 440 nm to 460 nm. Preferably, the array 120 blue LEDs contains an array based on gallium nitride blue LEDs.

The array is based on gallium nitride blue LEDs includes, but without limitation, an array of GaN blue LEDs, the array GaAlN blue LEDs, an array of InGaN LEDs, or an array of InAlGaN blue LEDs.

In the embodiment, the wavelength of emission peak of the array of red LEDs 110 is set within the range from 600 nm to 620 nm. Preferably, the array of red LEDs 110 contains an array of AlInGaP LEDs.

In a variant implementation, the phosphor contains YAG (garnet called upon to). In another embodiment, the phosphor contains a TAG (Aromatherapy grenades).

As shown in Fig.2, an array of red LEDs 110 and the array 120 is covered with phosphor blue LEDs are combined in series, and operating current power is supplied using a single-channel control device 200.

When the led light source 100 of the light is in working condition, the working current of the power supply using a single control device 200, flows through the array of red LEDs 110 and the array 120 is covered with phosphor blue LEDs, so the arrays 110 and 120, respectively, are activated to emit light. The proportion of blue light emitted from the array 120 is covered with phosphor blue led light�ODS, activates the phosphor coating to emit, yellow/green light, yellow/green light is mixed with the unabsorbed blue light passing through the phosphor for the generation of cold white light. Then a cold white light emitted from the array 120 is covered with phosphor blue LEDs are mixed with red light emitted from the array of red LEDs, to form a warm white light.

In the variants of implementation, shown in Fig.1 and 2, the color point of the mixed light from the array 120 is covered with phosphor blue LEDs, falls within the quadrangle of the chromaticity diagram CIE, where the coordinates of the four vertices of the quadrilateral are(0,375, 0,427), (0,390, 0,456), (0,366, 0,430), (0,38, 0,46).

In a variant implementation of the component ratio of the phosphor may be configured such that the color point of the mixed light from the array 120 is covered with phosphor LEDs that fall within a quadrilateral.

In another embodiment, the grain size of the phosphor can be adjusted so that the color point of the mixed light from the array of phosphor 120 LEDs blue light falls within the quadrilateral.

In an additional embodiment, the implementation and the component ratio, and grain size of the phosphor can be adjusted by the�them, that the color point of the mixed light from the array of phosphor LEDs that fall within a quadrilateral.

In addition, in the embodiments of Fig.1 and 2, when the junction temperature of the led array 120 is covered with phosphor blue LEDs and an array of red LEDs 110 is almost equal to room temperature, the ratio of the lumens output of the array 120 are covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is in the range from 4:1 to 1.5:1.

Preferably, the room temperature of 25°C.

It should be noted that the slight deviation of the room temperature for the present invention from 25°C.

In a variant implementation, the predefined duration of feeding of the control current to the array 120 is covered with phosphor blue LEDs and the array of red LEDs 110 occurs in the form of pulses, and the ratio of the lumens output of the array 120 are covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is measured. Then the proportion of blue LEDs from the array 120 is covered with phosphor blue LEDs red LEDs solid red LEDs 110 can be configured so that the ratio of the lumens output of the array 120 are covered with phosphor blue LEDs to the output of lumens m�of Siva red LEDs 110 is in the range from 4:1 to 1.5:1.

Since a predefined duration of working of the supply current of the array 120 are covered with phosphor blue LEDs and an array of red LEDs 110 in the form of pulses, the junction temperature of the LEDs is almost equal to room temperature, the accuracy of the modified output values of lumens provided and ensured the accuracy of the subsequent adjustments in the ratio of the lumens output.

Additionally, the predefined duration is from 5 to 100 MS, and preferably predefined duration is 25 MS.

Additionally, the fill factor of the control current supplied in the form of pulses, in the range from 1% to 20%.

In another embodiment, the implementation of the area ratio/ ratio of the total area of blue LEDs from the array 120 is covered with phosphor blue LEDs red LEDs solid red LEDs 110 can be configured so that the ratio of the lumens output from the array 120 is covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is in the range from 4:1 to 1.5:1.

In another embodiment of the invention, the quantitative ratio, and the ratio of blue LEDs from the array 120 is covered with phosphor blue LEDs red LEDs solid red LEDs 110 may be modified so that the ratio of the lumens output from the array 120 is covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is in the range from 4:1 to 1.5:1.

When the junction temperature of the LEDs of the array 120 are covered with phosphor blue LEDs and an array of red LEDs 110 is actually equal to room temperature, the ratio of the lumens output of the array 120 are covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is in the range from 4:1 to 1.5:1. Thus, when the led light source in the operating condition, that is, the junction temperature of the LEDs of the array 120 are covered with phosphor blue LEDs and an array of red LEDs 110, for example, is between 70°C and 100°C, the ratio of the lumens output of the array 120 are covered with phosphor blue LEDs to the lumens output of the array of red LEDs 110 is in the range from 4.8:1 to 3.8:1, thus, point warm white light mixed from a cold white light emitted from the array 120 blue phosphor LEDs and red light, emitted from the array of red LEDs 110 may be located within 5 MacAdam ellipses of color temperature 2700/3000K in place of a blackbody, as shown in Fig.3.

Fig.4 illustrates the appearance of the corresponding LEDs led sources light 100 according to the embodiment of the present invention. The array 110 red LEDs led sources light 100 includes a first red �vetted 1101 and the second red led 1102, and an array of phosphor 120 blue LEDs includes a first phosphor blue led 1201 and the second phosphor blue led 1202.

As illustrated in Fig.4, the four LEDs of the led source 100 light set asymmetrically on the substrate. The first phosphor blue led 1201 mounted on the left side of the substrate, the first red led 1101 and the second red led 1102 respectively mounted symmetrically on the upper side and the lower side of the substrate, and the second phosphor blue led 1202 is mounted on the right side of the substrate.

Note that the arrangement of Fig.4 is an illustrating example, and will be taken into account that the location of the LEDs of the led source of light 100 is not limited to the location described above.

In the embodiment of the array 120 are covered with phosphor blue LEDs and the array 110 red LEDs Packed into a carrier material, for example a ceramic substrate with a single silicone encapsulated lens on these two arrays of LEDs.

In the embodiment of the array 120 are covered with phosphor blue LEDs and the array 110 red LEDs Packed into a carrier material, for example ceramic substrate encapsulated with silicone lens at each Department�Lincoln led.

As described in previous embodiments, the led light source 100 of the light according to the options of implementing the present invention is controlled by a single controlling device, the led light source is not limited to running only one channel controlling device, it can also be controlled dual channel controller. As stated above, when the led light source is controlled by a dual channel controller, it is relatively complicated structurally, and the cost is higher. The led light source according to the options of implementing the present invention is controlled by a single control device, has the same lighting efficiency, reduces cost and simplifies the structure.

Although the present invention has been described above in detail and with reference to the accompanying drawings, it should be clear that such descriptions are merely illustrative and should not be construed in a restrictive sense; therefore, the present invention is not limited to the implementation of such options.

Will be easily understood that the specialists in the art can understand and implement other variations of the disclosed embodiments with the aid of the description of the study, disclosure of the contents of the attached drawings � the attached claims. In the claims, the verb "to be" and its conjugations does not exclude other elements or steps, and the singular does not exclude a plurality. In the practical application of the present invention, the functionality of many of the technical characteristics in the formula of the invention may be implemented as a single component. It should be clear that any reference numbers in the attached drawings and in the claims do not limit the scope of the present invention.

1. Led light source (100) of light, contains
array (110) red LEDs and
array (120) is coated with phosphor blue LEDs;
characterized in that the color point of the mixed light from the array (120) is coated with phosphor blue LEDs that fall within a quadrilateral diagrams CIE chromaticity, coordinates of the four vertices of the quadrilateral are(0,375, 0,427), (0,390, 0,456), (0,366, 0,430), (0,38, 0,46);
thus, when the junction temperature of the LEDs of the array (120) is coated with phosphor blue LEDs and LEDs of the array (110) red LEDs essentially equals room temperature, the ratio of the lumens output of the array (120) is coated with phosphor blue LEDs in relation to the lumens output of the array (110) red LEDs is in the range from 4:1 to 1.5:1.

2. Led light source (100) light �of claim 1, in which the quantitative ratio and/or the ratio of the areas of the LEDs of the array (120) is coated with phosphor blue LEDs to the LEDs of the array (110) red LEDs is adjusted so that the ratio of the lumens output of the array (120) is coated with phosphor blue LEDs in relation to the lumens output of the array (110) red LEDs is in the range from 4:1 to 1.5:1.

3. Led light source (100) of the light according to claim 1, wherein the component ratio and/or grain size of the phosphor is configured such that the color point of the mixed light from the array (120) is coated with phosphor blue LEDs that fall within a quadrilateral.

4. Led light source (100) of the light according to claim 1, wherein the wavelength of the peak radiation of the array (120) is coated with phosphor blue LEDs installed within the range of from 440 nm to 460 nm.

5. Led light source (100) of the light according to claim 4, in which the array (120) blue contains an array of LEDs based on gallium nitride blue LEDs.

6. Led light source (100) of the light according to claim 1, wherein the wavelength of the peak radiation of the array (110) red LEDs installed within the range of from 600 nm to 620 nm.

7. Led light source (100) of the light according to claim 6, in which the array (110) red LEDs contains an array of AlInGaP LEDs.

8. Led source�nick (100) of the light according to claim 1, wherein the phosphor is a YAG or TAG.

9. Led light source (100) of the light according to claim 5, in which an array of LEDs based on gallium nitride contains an array of GaN blue LEDs, the array GaAlN blue LEDs, an array of InGaN LEDs or an array of InAlGaN blue LEDs.

10. A lighting device (10) containing a single-channel driver (200) and led light source (100) of light according to any one of claims.1-9, in which the led light source (100) light operated by a single driver (200).



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. An electronic actuator (100) for solid-state lamp start-up is designed to receive the alternating-current voltage with the phase cutoff; receive from the alternating-current voltage with the phase cutoff of data on light regulation that defines the required level of light regulation at the lamp output; start up the solid-state lamp in the light-regulation mode at the level of light regulation corresponding to the required level of light regulation received from the alternating-current supply voltage with the phase cutoff. The actuator record input current; it comprises a lamp current control generator (130); a control device that controls the lamp current control generator, a rectifier (110) that rectifies the received alternating current supply voltage with the phase cutoff; a current sensor (150) that records an output current of the rectifier; a signal processor (160) that processes an output signal of the current sensor and generates an input signal for the control device (140).

EFFECT: regulation of light intensity.

9 cl, 13 dwg

Lighting module // 2556083

FIELD: electricity.

SUBSTANCE: invention relates to the lighting module for electrical and thermal connection with power infrastructure, having at least one power source, at that each power source contains two electrodes. The lighting module contains the light source for the light emission, in it the light source is the heat source during the light emission, two electric contacts to ensure contact with the electrodes of at least one power source, by this the electric connection is ensured between the lighting module and power infrastructure; control system located between the light source and electric contacts to control the power supply to the light source, in which the lighting module contains the measurements system measuring the thermal resistance of the thermal connection between the lighting module and power infrastructure during making of the electric connection , and in which the control system is made with possibility to reduce power supply to the light source when the thermal resistance is above the pre-set value to protect the lighting module against overheating. Invention also relates to the method of lighting module protection against overheating.

EFFECT: improved operation reliability of the module.

15 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting devices and control of operation of lighting devices. The result is achieved by that the system for control of the level of luminous efficiency of the solid-state lighting load operated by the illumination regulator includes the detector of phase angles and the load converter. The detector of phase angles is designed with a possibility of measurement of phase angle of the illumination regulator on the basis of rectified voltage from the illumination regulator and determination of the power control signal on the basis of comparison of the measured phase angle with pre-set first threshold. The power supply converter is designed with a possibility of supply of output voltage into the solid-state lighting load, and the power supply converter operates in the mode without feedback on the basis of rectified voltage from the illumination regulator when the measured phase angle is greater than the first threshold, and operates in the mode with feedback on the basis of the rectified voltage from the illumination regulator and a certain power control signal from the circuit of determination when the measured phase angle is less than the first threshold.

EFFECT: reduction of luminous efficiency in solid-state lighting load at low settings of the respective illumination regulator.

20 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: invention refers to lighting engineering. The lighting block contains at least two channels of the light sources and exciter for light sources. The exciter includes DC voltage converter and control system to control current supplied to at least one of two channels as response to the control signal provided by the DC voltage converter. Preferably the feedback circuit is controlled by the switching device in DC voltage converter to maintain the light level ensured by the light sources at the required level regardless of voltage changes of the power source and load.

EFFECT: increased efficiency of the light source control to achieve the required illumination effect.

18 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention is referred to lighting devices and control of the lighting devices operation. The result is attained due to determining of maximum and minimum angles of a dimmer (204) connected to a power converter (220) during the operation of a solid-state lighting load (240); and dynamic regulation of the output power for the power converter based on the determined maximum and minimum angles of the dimmer. The regulated output power of the power converter regulates the upper level of the light output by a load of solid-state lighting at the maximum phase angle so that the preset upper limit value is met and regulates the lower level of the light output by a load of solid-state lighting at the minimum phase angle so that the preset lower limit value is met.

EFFECT: control of the power converter in order to ensure an equal range of light control to the load of solid-state lighting notwithstanding the type of the dimmer.

18 cl, 12 dwg, 2 tbl

Illumination device // 2554080

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. Illumination device (1) contains at least one light source (50) of low power; input power supply cascade (20) fit for receipt of low alternate voltage from an electronic transformer (ET); buffer power supply cascade (30) having input (31) connected to output (29) of the input power supply cascade; excitation circuit (40) intended for excitation of light and receipt of power supply from the buffer power supply cascade. The input power supply cascade generates output current pulses in order to charge the buffer power supply cascade at relatively low frequency, and during each output current pulse the input power supply cascade consumes input current, output current always has current value bigger than the required minimum load for the electronic transformer.

EFFECT: reducing light blinking by improving compatibility between light sources and electronic transformer.

15 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting. Result is ensured by that the lighting device contains multiple LEDs connected in series. In the lighting device the first set of LEDs has first type LEDs, having first output of the light flow decrease as first function of the junction temperature. The second set of LEDs has second type LEDs having second output of the light flow decreased as second function of their junction temperature that differs from the first function. At least one first type LED and one second type LED are connected in parallel to the resistors set with resistance depending on the temperature. The resistance temperature dependence stabilizes ratio of the first light flow output to the second light flow output at different junction temperatures of the first set of LEDs and second set of LEDs.

EFFECT: prevention of change of ratio of light flow output of various types LEDs as part of same lighting device.

13 cl, 11 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. Lighting installation (1) comprises input pins (2) for connection to alternating current (AC) network; a circuit (10) of light-emitting diodes (LED) connected in series with input pins; rectifier (30) with input pins (31, 32) connected in series with LED circuit, controllable voltage source (40) with input pins coupled to output pins of the rectifier; in-series assembly of at least one auxiliary LED (51) and the second ballast resistor (52) coupled to output pins of the controllable voltage source. Voltage source comprises in-series assembly of the fist controllable resistor (46) and the second resistor (47) coupled in parallel to input pins; controllable semiconductor stabilitron connected in parallel to output pins, which has input pin (48) connected at connection point between two resistors; at that positive output pin is connected to positive input pin while negative output pin is connected to negative input pin.

EFFECT: simplified regulation of the device in regard to luminous power and luminous efficiency shift to lower colour temperature.

7 cl, 2 dwg

Led circuit // 2550496

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. In LED circuits (1) comprised of in-series first and second circuits (11, 12) with the first and second LEDs; the third circuits (13) are connected in parallel to the second circuits (12) to control the first LEDs in the first circuits (11) and /or third LEDs in the fourth circuits (14). The LED circuit (1) receives supply voltage from a power supply source (2, 3) supplying the LED circuit (1). The third circuit (13) receives supply voltage from the second circuit (12) supplying the third circuit (13). Supply voltage may be represented as voltage in the second circuit (12). The third circuit (13) may control the second LEDs in the second circuit (12) additionally. The above control may contain control unit for current passing through the above LEDs in order to turn light down, suppress light blinking, to adjust light and/or to protect overheating.

EFFECT: improving control efficiency.

13 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. An excitation circuit of LED with adjustable brightness includes a resonant DC/DC converter connected to a resonant circuit. The converter includes a half-wave or double-wave switching circuit connected to the resonant circuit. An output signal of the resonant circuit is rectified and supplied to an output circuit. The output circuit can contain at least one series or shunting LED switch for switching on and off a LED unit. The control circuit controls switches of the switching circuit with a variable switching frequency and is configured to control the switching circuit for amplitude modulation of the converter and for pulse-width modulation of the converter with the first frequency of pulse-width modulation that is lower than the switching frequency. The control circuit can be additionally configured to control switching of the LED switch with the second frequency of pulse-width modulation that is lower than the switching frequency.

EFFECT: providing deep brightness adjustment with stable control of a working cycle of pulse-width modulation.

10 cl, 7 dwg

FIELD: physics.

SUBSTANCE: LED lamp comprises a LED module made either in the form of a COB (chip-on-board) module, comprising compound-sealed LED chips mounted on a printed-circuit board and having electrical connection with the printed-circuit board, or in the form of a printed-circuit board having surface-mounted lumped LEDs, having electrical connection with the printed-circuit board. The LED module is placed over a heatsink, inside of which there is a voltage converter, electrically connected to the LED module and the lamp base. The optical system of the LED module is based on a truncated toric lens matrix attached to the printed-circuit board and having an undercut in which a compound-sealed LED chip or lumped LEDs are placed. The lens matrix can have additional structurally integrated optical elements in the form of a light-refracting sector of the lower part of the toric lens, as well as in the form of an element in the undercut region, which provides total internal reflection of incident lateral LED radiation. The material of the lens matrix can contain a light-scattering material (dispersant). The design of the LED lamp enables to generate a wide-angle beam pattern.

EFFECT: improved optical characteristics and high efficiency of illumination owing to creation of an optimum heat removal system and improved protection from negative environmental factors.

21 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. LED illuminating module (110) is comprised of vertical continued support structure (120) for LEDs, outer shell (103) surrounding the above support structure (120) for LEDs, and matrix for individually oriented LEDs (133) connected to vertical continued support structure (120) for LEDs, and plurality of optical elements (134). The plurality of the above LEDs (133) have light output axis (A) oriented towards the area of illumination, at that each of optical elements (134) is mounted and placed at distance from one of the above LEDs (133) respectively, crosses its light output axis A, at that changing distribution of light output for one of the above LEDs (133). The device is equipped with at least one vertical continued light-transmitting inner lens (150/260) placed between plurality of optical elements (134) and outer shell (103); the lens crosses light output axis (A) of the above plurality of LEDs (133) under non-right angle.

EFFECT: improvement of efficiency of lighting.

14 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. Lighting device 1100 includes bulb 18, housing 16 connected to bulb 18 and base 14 connected to bulb 18 and the first printed board 30 located inside housing 16. Light sources 32 are located on the first printed board 30. Heat-absorbing device 210 is thermally connected to light sources 32. Heat-absorbing device 210 includes mutually spaced plates 1140 having outer edges and through holes. Each of outer edges 1144 is in contact with housing 16. The lighting device also includes elongated assembly 1110 of a printed board of a control circuit, which is electrically connected to light sources 32 of the first printed board 30 and to base 14. Printed board 1110 of the control circuit passes through holes 1170. On printed board 1110 of the control circuit there located are electric components 1112 for control of light sources 32.

EFFECT: enlargement of a range of technical means.

182 cl, 28 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting devices. In a light-emitting device a light source has narrow or limited distribution of light intensity. The device is designed so that light from a source is emitted with a wider spatial distribution of light intensity through a peripheral surface at the light emission section designed as a funnel.

EFFECT: light-emitting device in addition contains a mixing section for the light radiated from the source.

13 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. A lighting device includes a housing from non-conductive material, and the following components located in it: a light source based on light emitting diodes, which includes at least one first light-emitting diode generating the first emission having the first spectrum, and at least the second light emitting diode generating the second emission with the second spectrum different from the first one, a lens connected to the light source, a heat-absorbing device, as well as a base for connection to a seat and an electric circuit with a power converter. The technical result is achieved due to the fact that it is provided with a temperature sensor located in a close proximity to the light source, and the power converter is a switching power source receiving a temperature signal for control of currents passing through the first and/or at least one second light emitting diode so that the first current can vary from the second one.

EFFECT: improvement of lighting efficiency.

10 cl, 22 dwg, 2 tbl

Lighting instrument // 2543979

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. A lighting instrument and a light-emitting element for acceleration of growth of plants. The instrument includes a single emission source in the form of a light-emitting diode that provides at least two emission peaks at the wave length interval of 300-800 nm, with that, at least one of the above emission peaks has width at half-height, which is equal to at least 50 nm. The above emission peaks of the light-emitting diode coincide with a spectrum of photosynthesis reactions of plants.

EFFECT: improving plant irradiation efficiency.

11 cl, 6 dwg

Electric lamp // 2539580

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The electric lamp (1) comprises a base (2), a bulb (4) installed on the base, the bulb contains at least one semiconductor light source (5). The coolers (6) contain at least two facing cooling fins (7, 8), which are separated by at least one gap (9) dividing the lamp bulb into at least two distinguished parts of the bulb. The above gap is open to the environment and passes from the bulb centre to external surface of the bulb. The lamp includes a light-transmission wall (13) in order to redistribute light. The light-transmission wall (13) may contain two separate parts (14, 15) in the wall in order to redistribute light during operation. Each distinguished bulb part may be shaped as surface of elongated ellipse or a half of flattened ellipse.

EFFECT: improvement of lighting efficiency by light redistribution in a form of a double beam or homogeneous and omnidirectional light distribution.

16 cl, 18 dwg

Lighting unit // 2538783

FIELD: electricity.

SUBSTANCE: lighting unit intended for lighting of large surfaces contains a carrier (11) with several light-emitting diodes (LEDs) (13) fixed in two-dimensional configuration. Between the LEDs at the carrier there are several fixed reflective elements (17), which are connected through the carrier to LEDs with provision of thermal conductivity so that the reflective elements serve a cooling device for LEDs; the reflective elements are made of metal or plastic with metal coating. The lighting device has several lighting units installed close to each other in the same direction or two mutually perpendicular directions. Modular system of the lighting unit includes the carrier and different sets of reflective elements.

EFFECT: reducing power consumption.

33 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The housing contains a transmitting part containing a transmitting ceramic material and designed with a possibility of a transmitting, at least, a part of light from the light source or, at least, a part of light of the luminescent material, and a reflecting part, where the reflecting part contains the ceramic reflecting material and is designed with a possibility of reflecting, at least, a part of light from the light source.

EFFECT: improving efficiency of heat removal, which is attained due to the fact that the lighting fixture comprises a housing containing the light source, preferably LED, and luminescent material.

15 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The light source (10, 12) contains a light emitter (20) installed inside a transparent external flask (30, 32), comprising the light-emitting device (40) and the transparent internal flask (50), at least, partially enclosing the light-emitting device. The transparent internal flask has a diffuser containing luminescent material intended for transformation of light with the greater wavelength. The diameter (di) of the transparent internal flask is less than the diameter (do) of the transparent external flask. The transparent external flask is connected with the non-transparent base (60) and is fitted with an additional diffuser. The transparent external flask has a centreline (S). The imaginary plane (P) of the base is set, essentially, perpendicularly to the centreline (S) and is intersected with the connection point (C), which is a part of the transparent external flask. The light emitter is arranged inside the transparent external flask at a distance from the imaginary plane of the base far from the base.

EFFECT: improvement of illumination quality at the expense of increase of the profile of spatial radiation of a light source.

19 cl, 8 dwg

FIELD: physics.

SUBSTANCE: fluorescent tube fitting device has a light-emitting diode element (4) which includes at least one electric starter element (4.1) connected to at least one phase conductor and also connected to at least one neutral wire at least through one conductor (4.2) having at least one light-emitting diode (4.3).

EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.

3 cl, 2 dwg

Up!