CN219919223U - LED lamp - Google Patents

Abstract

The utility model discloses an LED lamp, which comprises: the LED lamp comprises a substrate, a plurality of wafers, an LED lamp driver and a resistor unit. Wherein the substrate is of a ceramic structure; the plurality of wafers comprises a red wafer, a green wafer, a blue wafer and a white wafer, wherein the red wafer, the green wafer, the blue wafer and the white wafer are mutually connected in parallel and positioned on the substrate. The LED lamp driver is respectively connected with the wafers and is positioned on the substrate; the resistor unit is positioned on the substrate and connected with the LED driver. By adopting the technology provided by the utility model. The high-power effect of the LED lamp can be effectively achieved, and the high-frequency color and brightness change of the atmosphere lamp can be met.

Description

LED lamp

Technical Field

The utility model relates to the technical field of LEDs, in particular to an LED lamp.

Background

The LED lamp has very high application in life, has the advantages of low energy consumption and high conversion rate compared with the traditional light-emitting equipment, has small volume and can be suitable for various decorative lamps.

However, in the field of automobile atmosphere lamps, the conventional LED lamps cannot meet the requirements of beauty and health of human eyes while the conventional LED lamps cannot meet the requirements of high-frequency color, brightness and the like. That is, the conventional LED lamp synthesizes white light by using low-frequency color mixing when color mixing is performed on color light, and using three primary colors R, G, B when white light is emitted. Although the human eyes cannot correctly distinguish different colors of the light source, long-term use is easy to cause eye fatigue, especially in the field of atmosphere lamps with high color conversion frequency.

Disclosure of Invention

The utility model provides an LED lamp, which solves the problem that the LED lamp in the prior art cannot adapt to high-frequency color and brightness changes of an atmosphere lamp.

In order to solve the technical problems, the technical scheme adopted by the utility model is to provide an LED lamp, which comprises: the LED lamp comprises a substrate, a plurality of wafers, an LED lamp driver and a resistor unit.

Wherein the substrate is of a ceramic structure; the plurality of wafers comprises a red wafer, a green wafer, a blue wafer and a white wafer, wherein the red wafer, the green wafer, the blue wafer and the white wafer are mutually connected in parallel and positioned on the substrate.

The LED lamp driver is respectively connected with the wafers and is positioned on the substrate; the resistor unit is located on the substrate and connected with the LED lamp driver.

The technical scheme provided by the utility model has the beneficial effects that:

in the working process of the LED lamp, part of electric energy is converted into heat energy, wherein a substrate of the LED lamp adopts a ceramic structure, and heat dissipation can be effectively carried out in the working process of the LED lamp. Wherein, the red light wafer, the green light wafer and the blue light wafer can be effectively matched, so that the LED lamp displays various colors. I.e. the LED lamp driver drives the different wafers to emit light. And, the brightness of the wafer is different under the passage of different currents (such as the driving current of the LED lamp driver passes through the resistor unit).

In addition, the LED lamp also has a white light wafer, and the common white light emitting mode in the prior art is red light, green light and blue light. However, the white light emitted in this way is not pure enough, so when the white light is required to be emitted, the LED lamp driver is used to drive the white light chip to emit light.

In some embodiments, the LED lamp driver is bonded to the red, green, blue, and white light wafers, respectively, wherein the current of the current channel of the LED lamp driver to any of the wafers ranges from 60mA to 350mA.

By adopting the technical scheme, the LED lamp driver is a four-channel LED lamp driver, wherein the LED lamp driver can supply power for any combined wafer at the same time, and as red, yellow and blue are three primary colors, the LED lamp driver can be combined to form various colors. Therefore, the LED lamp driver is used for electrifying the wafers with different colors, namely, distributing currents with different magnitudes, so that light emitted by the wafers with different colors is mixed, and the LED lamp can emit light with various colors.

In addition, the output capacity of each channel can be up to 350mA, and can be up to 60mA. The LED lamp driver realizes the brightness control of any wafer through the passage current.

In some embodiments, the LED lamp driver is further integrated with a pulse width modulation controller, wherein the pulse width modulation controller is capable of generating a PWM signal, and when the LED lamp driver receives the PWM signal, the power frequency of the LED lamp driver is capable of being adjusted according to the PWM signal. Wherein the working frequency of the pulse width modulation controller is more than 100HZ.

By adopting the technical scheme, the pulse width modulation technology is to modulate a series of pulse widths so as to equivalently obtain the required waveforms. The PWM signals generated by the PWM controller enable the LED lamp driver to adjust the energizing frequency of each channel according to the PWM signals. When the PWM control frequency is increased, the control period of each wafer is effectively shortened, so that the adjustment accuracy is high.

In some embodiments, the substrate further has a plurality of gains for increasing current.

By adopting the technical scheme, the gain devices are positioned in the LED lamp driver and are used for amplifying the current of each passage, wherein the LED lamp driver comprises 16 gain devices in total, so that four gain devices are arranged in each passage of each wafer. Thus effectively realizing the highest value of the current of each channel to 350mA.

In some embodiments, the resistor unit further comprises an external resistor for limiting the driving power of the wafer; the external resistor is also connected with a plurality of the gain devices.

By adopting the technical scheme, the external resistor can adjust the current of the output port of each passage through external connection without using a resistance value, namely, the external resistor and the gain device can effectively adjust the current of each passage. The external resistor can also be used as a sampling resistor for sampling the current and the voltage of the passage of each wafer.

In some embodiments, a GND ground port is further provided on the substrate, where the GND ground port is connected to an external power source.

By adopting the technical scheme, as the LED lamp is required to be connected with an external power supply, the GND grounding port is used for being connected with the negative electrode of the power supply, and the safety of the LED lamp can be effectively improved.

In some embodiments, the substrate also has thereon a DIN pin and a DOUT pin, the DIN pin being located on one side of the external resistor; the DOUT pin is positioned at one side of the GND grounding port; wherein the LED lamp driver is located between the DIN pin and the DOUT pin.

By adopting the technical scheme, the DIN pin and the DOUT pin are common data transmission ports in the prior art, wherein the DIN pin is used for receiving data and transmitting the data to the LED lamp driver, so that the LED lamp driver displays corresponding colors according to the data. The DOUT pin can transmit the color data of the LED lamp to the outside. The LED lamp can be used as an automobile exterior lamp and becomes an execution main body of an automobile interior control terminal (such as ECU).

In some embodiments, the substrate further comprises at least any one of: ceramic, aluminum substrate and heat sink.

By adopting the technical scheme, the substrate adopts the ceramic structure to effectively dissipate heat, wherein the optional aluminum substrate or the radiating fin is used as a further auxiliary radiating structure to dissipate heat, so that the radiating effect of the substrate can be effectively enhanced.

In some embodiments, the LED lamp has a grayscale of 65536 levels.

By adopting the technical scheme, the 65536-level gray scale can display more color details, wherein the gray scale of the LED lamp is realized by high-precision PWM modulation.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it will be obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

fig. 1 is a schematic perspective view of an embodiment of an LED lamp according to the present utility model;

FIG. 2 is a schematic diagram II of an embodiment of an LED lamp according to the present utility model;

FIG. 3 is a schematic diagram of an embodiment of an LED lamp driver according to the present utility model;

fig. 4 is a schematic circuit diagram of an embodiment of an LED lamp according to the present utility model.

In the figure:

a base plate-10;

wafer-20; red light wafer-21; green wafer-22; blue light wafer-23; white light wafer-24;

LED lamp driver-30; a pulse width modulation controller-31; a decoding module-32;

a resistor unit 40; an external resistor-41; GND ground port-42; a resistor-43;

gain-50; a current gain detection feedback module-51; an oscillator-52;

DIN Pin-60; DOUT pin-61;

an external power supply-70; colloid-71; and a bracket-72.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

Referring to fig. 1 to 2, fig. 1 shows a schematic perspective view of an embodiment of an LED lamp according to the present utility model, and fig. 2 shows a schematic view of a second embodiment of an LED lamp according to the present utility model.

The technical scheme adopted by the utility model is to provide an LED lamp, which comprises: a substrate 10, a plurality of wafers 20, an led lamp driver 30, and a resistor unit 40.

Wherein the substrate 10 is a ceramic structure; the plurality of wafers 20 includes a red wafer 21, a green wafer 22, a blue wafer 23, and a white wafer 24, wherein the red wafer 21, the green wafer 22, the blue wafer 23, and the white wafer 24 are connected in parallel to each other and located on the substrate 10.

The LED lamp drivers 30 are connected to the plurality of wafers 20, respectively, and are located on the substrate 10; the resistor unit 40 is located on the substrate 10 and connected to the LED lamp driver.

In the embodiment of the utility model, the LED lamp driver 30 is respectively connected with the red light chip 21, the green light chip 22, the blue light chip 23 and the white light chip 24, wherein the red light chip 21, the green light chip 22 and the blue light chip 23 can be mixed by different ratios, so that the LEDs emit different colors of light, that is, the brightness of the chips 20 is different under the passage of different currents (for example, the driving current of the LED lamp driver 30 passes through the resistor unit 40). For example, the red wafer 20 and the green wafer 20 emit light at the same time, and the emitted color light is yellow. In addition, although white light can be mixed together from red, green and blue light, such white light is not pure enough to exhibit color details. That is, the present utility model adds the white light chip 24 so that the LED lamp driver 30 individually energizes the white light chip 24 when white light emission is desired, thereby allowing the LED lamp to emit pure white light.

Illustratively, the substrate 10 is located at the bottom, where the substrate 10 has a support 72 thereon, and the substrate 10 is in a ceramic structure, so that heat dissipation can be effectively performed during the LED operation. The wafer 20 and the LED lamp driver 30 are both disposed on the substrate 10 and fixed by a bracket 72, and a glue 71 is used for adhesion fixation.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an embodiment of an LED lamp driver 30 according to the present utility model.

In some embodiments, the LED lamp driver 30 is connectively bound to the red, green, blue, and white light dies 21, 22, 23, 24, respectively, wherein the current flow of the current channel of the LED lamp driver 30 to either die 20 ranges from 60mA to 350mA.

In the embodiment of the utility model, the LED lamp driver 30 is a four-channel LED lamp driver 30, wherein the LED lamp driver 30 can supply power to any combination of the wafers 20 at the same time, and multiple colors can be formed by combining red, yellow and blue colors as three primary colors. Therefore, the LED lamp driver 30 is used for electrifying the wafers 20 with different colors, namely, distributing currents with different magnitudes, so that the light emitted by the wafers 20 with different colors is mixed, and the LED lamp can emit light with various colors.

Illustratively, a resistor 43 is also provided within the LED lamp driver 30 for controlling the magnitude of the current. The paths between the LED lamp driver 30 and the wafers 20 are respectively connected with GND ground ports 42, so that the safety performance of the LED lamp is further improved. In addition, the output capacity of each channel can be up to 350mA, and can be up to 60mA. The LED lamp driver 30 passes the path current to achieve brightness control for either die 20.

In some embodiments, the LED lamp driver 30 is further integrated with a pulse width modulation controller 31, wherein the pulse width modulation controller 31 is capable of generating a PWM signal, and when the LED lamp driver 30 receives the PWM signal, is capable of adjusting the power frequency of the LED lamp driver 30 according to the PWM signal. Wherein the operating frequency of the pwm controller 31 is greater than 100HZ.

In the embodiment of the utility model, the pulse width modulation technology is to modulate a series of pulse widths so as to equivalently obtain a required waveform. The PWM signal generated by the PWM controller 31 enables the LED lamp driver 30 to adjust the energizing frequency of each channel according to the PWM signal. When the PWM control frequency is increased, the control period of each wafer 20 is effectively realized to be short, so that the adjustment accuracy thereof is high.

That is, the wafer 20 can be turned on at a high level and turned off at a low level, and the brightness is high by periodically changing the ratio of the high level to the low level, so that the wafer 20 is controlled to be bright, for example, when the ratio of the low level in one period is large.

For example, in the field of LED lamps, PWM control frequencies of 60HZ to 100HZ are typically used, whereas the PWM control frequency of the present utility model is raised above 100HZ.

Referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an LED lamp according to the present utility model.

In some embodiments, the substrate 10 further has a plurality of gain stages 50 thereon, the gain stages 50 being configured to increase the current.

In the embodiment of the present utility model, the gain device 50 is used to amplify the current of the path, wherein, for example, the gain device 50 (i.e. the current amplifier) used in the present utility model is 16, so that the highest value of the current of each path is effectively achieved to 350mA. However, the number of the gain stages 50 is not limited in the present utility model, and for example, 12 gain stages may be used to increase the path current.

The gain unit 50 is connected to the current gain detection feedback module 51 and the decoding module 32, respectively, and the oscillator 52 transmits the fed-back signal to the decoding module 32. The oscillator is used as a feedback amplifier and can be used as a frequency reference. And, decoding and feedback of current data is a common current control means in the prior art. The above-described functions are applied to the current control of the LED lamp so that the path current of each die 20 of the LED lamp can be further amplified and matched with the pulse width modulation controller 31 of the LED lamp driver.

In some embodiments, the resistor unit 40 further includes an external resistor 41, where the external resistor 41 is used to limit the driving power of the wafer 20; the external resistor 41 is further connected to a plurality of the gains 50.

In the embodiment of the present utility model, the external resistor 41 is capable of adjusting the current of each path output port by external connection without using a resistance value, that is, the external resistor 41 and the gain 50 are used to effectively adjust the current of each path. The external resistor 41 can also be used as a sampling resistor 43 for sampling the current and voltage of the path of each wafer 20.

Illustratively, as shown in connection with fig. 1 and 4, an external resistor 41 is located on the substrate 10 and is electrically connected to the LED lamp driver 30. The external resistor 41 is further electrically connected to the gain device 50, so that the current gain detection feedback module 51 can detect the current through the external resistor 41, and thus feedback the current.

In some embodiments, the substrate 10 is further provided with a GND ground port 42, wherein the GND ground port 42 is connected to an external power source 70.

In the embodiment of the utility model, since the LED lamp needs to be connected with an external power supply, the GND grounding port 42 is used for being connected with the negative electrode of the power supply, so that the safety of the LED lamp can be effectively improved. Illustratively, as shown in connection with fig. 3, the LED lamp driver 30 is further provided with a plurality of GND ground ports 42, wherein the GND ground ports 42 are respectively connected with the vias of the respective wafers 20, thereby further improving the safety thereof.

In some embodiments, the substrate 10 further has a DIN pin 60 and a DOUT pin 61 thereon, the DIN pin 60 being located on one side of the external resistor 41; the DOUT pin 61 is located on the GND ground port 42 side; wherein the LED lamp driver 30 is located between the DIN pin 60 and the DOUT pin 61.

In the embodiment of the present utility model, the DIN pin 60 and the DOUT pin 61 are data transmission ports commonly used in the prior art, wherein the DIN pin 60 is used for receiving data and transmitting the data to the LED lamp driver 30, so that the LED lamp driver 30 displays a corresponding color according to the data. In addition, as shown in connection with fig. 3, DIN pins 60 and DOUT pins 61 are also provided in the LED lamp driver 30 for input and output of data.

The DOUT pin 61 can transmit color data of the LED lamp to the outside. So that the LED lamp can be used as an exterior lamp of an automobile and become an execution subject of an interior control terminal (e.g., ECU) of the automobile.

In some embodiments, the substrate 10 further comprises at least any one of: ceramic, aluminum substrate and heat sink.

In the embodiment of the utility model, the substrate 10 adopts a ceramic structure to effectively dissipate heat, wherein an optional aluminum substrate or a radiating fin is used as a further auxiliary radiating structure to dissipate heat, so that the radiating effect of the substrate can be effectively enhanced.

In some embodiments, the LED lamp has a grayscale of 65536 levels.

In the embodiment of the utility model, the 65536-level gray scale can display more color details, wherein the gray scale of the LED lamp is realized by high-precision PWM modulation, namely, the high-frequency regulation and control of the pulse width modulation controller 31.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields using the descriptions and drawings of the present utility model should be carried within the scope of the present utility model.

Claims (10)

1. An LED lamp, comprising:

the substrate is of a ceramic structure;

a plurality of wafers, wherein the wafers comprise a red wafer, a green wafer, a blue wafer and a white wafer, and the red wafer, the green wafer, the blue wafer and the white wafer are mutually connected in parallel and positioned on the substrate;

the LED lamp drivers are respectively connected with the wafers and positioned on the substrate;

and the resistor unit is positioned on the substrate and connected with the LED lamp driver.

2. The LED lamp of claim 1, wherein the LED lamp driver is bonded to the red, green, blue, and white light wafers, respectively, wherein the current flow of the LED lamp driver to the current path of any of the wafers ranges from 60mA to 350mA.

3. The LED lamp of claim 1, wherein the LED lamp driver is further integrated with a pulse width modulation controller, wherein the pulse width modulation controller is capable of generating a PWM signal, and wherein when the LED lamp driver receives the PWM signal, the power frequency of the LED lamp driver is capable of being adjusted in accordance with the PWM signal.

4. The LED lamp of claim 3, wherein the pwm controller operates at a frequency greater than 100HZ.

5. The LED lamp of claim 1, wherein the substrate further has a plurality of gains thereon for increasing current.

6. The LED lamp of claim 5, wherein the resistor unit further comprises an external resistor for limiting the driving power of the die; the external resistor is also connected with a plurality of the gain devices.

7. The LED lamp of claim 1, wherein the substrate is further provided with a GND ground port, wherein the GND ground port is connected to an external power source.

8. The LED lamp of claim 6 or 7, further having DIN pins and DOUT pins on the substrate, the DIN pins being located on one side of an external resistor; the DOUT pin is positioned at one side of the GND grounding port; wherein the LED lamp driver is located between the DIN pin and the DOUT pin.

9. The LED lamp of claim 1, wherein the substrate further comprises at least any one of: ceramic, aluminum substrate and heat sink.

10. The LED lamp of claim 1, wherein the LED lamp has a grayscale of 65536 levels.