CN221329163U - Matrix lamp circuit, system and mobile phone - Google Patents
Matrix lamp circuit, system and mobile phone Download PDFInfo
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- CN221329163U CN221329163U CN202323366758.0U CN202323366758U CN221329163U CN 221329163 U CN221329163 U CN 221329163U CN 202323366758 U CN202323366758 U CN 202323366758U CN 221329163 U CN221329163 U CN 221329163U
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Abstract
The application relates to the field of lamp control, in particular to a matrix lamp circuit, a matrix lamp system and a mobile phone. The circuit comprises a control module, a driving module and a matrix lamp module, wherein the matrix lamp module comprises a plurality of lamps which are arranged in a matrix; the control module is interacted with the driving module, and the driving module is connected with the matrix lamp module; the control module is designed to calculate an input current of at least one lamp according to a preset target power and a conduction voltage of the at least one lamp, and the driving module provides different driving currents for each lamp in the matrix lamp module according to the calculated input current of each lamp. The control module calculates the input current of each lamp by utilizing the target power and the on voltage of each lamp, and then controls the driving module to transmit the driving current with corresponding magnitude to each lamp according to the input current, so that the luminous brightness of each lamp is consistent, and the luminous uniformity of the lamps is improved.
Description
Technical Field
The application relates to the field of lamp control, in particular to a matrix lamp circuit, a matrix lamp system and a mobile phone.
Background
The breathing lamp means that the light is gradually changed from light to dark under the control of the microcomputer, the breathing lamp is perceived as if people breathe, the breathing lamp is widely applied to mobile phones and becomes one of selling points of new mobile phones of various brands, and the function of informing and reminding is achieved. In practical use, the red, green and blue lamps are controlled to emit different brightness, so that different colors are formed. The matrix dazzle lamp formed by packaging a plurality of RGB (red, green and blue LED lamps into one module) can form patterns with different colors, so that the mobile phone is more dazzling.
The on voltage of the LEDs of the same model is not a fixed value, but fluctuates within a certain range, when all LEDs flow the same current, the power consumed by different LEDs can be different due to different on voltages, and the different powers can lead to different brightness of the LEDs, so that when a plurality of LEDs form a matrix, uneven brightness can be caused.
Disclosure of Invention
The application provides a matrix lamp circuit, a matrix lamp system and a mobile phone, which are used for at least solving the technical problem of uneven brightness.
According to a first aspect of an embodiment of the present application, there is provided a matrix lamp circuit, including a control module, a driving module, and a matrix lamp module, wherein the matrix lamp module includes a plurality of lamps arranged in a matrix;
The control module is interacted with the driving module, and the driving module is connected with the matrix lamp module;
The control module is designed to calculate an input current of at least one lamp according to a preset target power and a conduction voltage of the at least one lamp, and the driving module provides different driving currents for each lamp in the matrix lamp module according to the calculated input current of each lamp.
Optionally, the driving module comprises a current input pin for providing current to the driving module;
the function pin is connected with the control module and used for interacting with the control module;
The driving output pin is connected with the input end of the matrix lamp module and used for providing working voltage for the lamp;
and the driving input pin is connected with the output end of the matrix lamp module.
Optionally, the control module includes a conversion pin connected to the driving output pins, and configured to obtain the working voltages output by the driving output pins.
Optionally, the control module is designed to:
based on interaction between the functional pins and the driving module, controlling the driving module to transmit constant driving current to the matrix lamp module;
Controlling the on-off of the driving input pins based on the functional pins to adjust the lamps capable of forming a current loop in the matrix lamp module;
And when the lamp forming the current loop is lightened, the working voltage of the corresponding driving output pin on the driving module is obtained, and the conducting voltage of the corresponding lamp is obtained.
Optionally, the matrix-arranged lamps include n rows and m columns; the number of the driving output pins is not less than m, and each column is connected with one driving output pin; the number of the driving input pins is not less than n, and each row is connected with one driving input pin;
The control module is designed to:
Controlling the driving input pins of the driving module to be sequentially conducted so that the lamps of each row are sequentially turned on, wherein the working voltage flows through the m driving output pins when the lamps of each row are turned on;
And acquiring the working voltage transmitted by each driving output pin based on the conversion pins to obtain the conducting voltage of each lamp.
Optionally, the control module is designed to:
obtaining input current of each lamp by comparing the target power with the conducting voltage of each lamp;
and controlling the driving module to transmit driving current with corresponding input current to corresponding lamps in the matrix lamp module based on the function pins so as to enable the lamps to work with constant power.
Optionally, the conversion pins include m analog-to-digital converter ports, and are respectively connected with m driving output pins of the driving module;
The control module also comprises a plurality of read-write pins which interact with the function pins of the driving module through an integrated circuit bus;
The function pins include an enable pin, an interrupt pin, and a communication pin.
Optionally, the lamp comprises three parallel branches, and each branch is connected with an LED lamp in series; and each lamp is arranged in parallel and is arranged into a matrix.
According to a second aspect of the embodiments of the present application, there is provided a matrix lamp system, including the matrix lamp circuit described above, wherein the control module and the driving module are integrally provided.
According to a third aspect of the embodiment of the present application, there is provided a mobile phone, including the above-mentioned matrix lamp circuit or the above-mentioned matrix lamp system.
In the embodiment of the application, the control module can interact with the driving module, so that the control module can control the driving module to supply power for the matrix lamp module. When the light-emitting brightness of each lamp needs to be controlled to be consistent, the control module calculates the input current of each lamp by utilizing the target power and the conducting voltage of each lamp, and then controls the driving module to transmit the driving current with corresponding magnitude to each lamp according to the input current, so that the light-emitting brightness of each lamp is consistent, and the light-emitting uniformity of the lamp is improved.
Drawings
Fig. 1 is a block diagram of the circuitry of the matrix in one embodiment.
Fig. 2 is a schematic diagram of a matrix lamp module of a circuit of a matrix in one embodiment.
FIG. 3 is a schematic diagram of a drive module of a circuit of the matrix in one embodiment.
FIG. 4 is a control block diagram of the circuitry of the matrix in one embodiment.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
The on voltage of the LEDs of the same model is not a fixed value, but fluctuates within a certain range, when all LEDs flow the same current, the power consumed by different LEDs can be different due to different on voltages, and the different powers can lead to different brightness of the LEDs, so that when a plurality of LEDs form a matrix, uneven brightness can be caused.
Based on the above, as shown in fig. 1, the matrix lamp circuit provided by the application comprises a control module, a driving module and a matrix lamp module, wherein the matrix lamp module comprises a plurality of lamps arranged in a matrix;
The control module is interacted with the driving module, and the driving module is connected with the matrix lamp module;
The control module is designed to calculate an input current of at least one lamp according to a preset target power and a conduction voltage of the at least one lamp, and the driving module provides different driving currents for each lamp in the matrix lamp module according to the calculated input current of each lamp.
It should be noted that, since the light emission of the plurality of lamps is not uniform, and the power of the plurality of lamps is not uniform, the target power is preset so that the power of each lamp when emitting light is equal to the target power in order to make the light emission brightness of each lamp identical. After the target power is determined, as known by the formula p=ui, when the voltage or current is known, another variable is controlled, so that the power of the lamp can be ensured to reach the target power. That is, the target power can be determined according to the required brightness of the light emitted by the lamps, and then the input current is calculated by using the turn-on voltage of the lamps, so that the actual power of each lamp can be ensured to be equal to the target power, and the brightness of each lamp is adjusted to be consistent.
In an embodiment, the on-voltage of each lamp may be known in advance through experiments, or may be known by calculation before the lamp is controlled, and the method of obtaining the on-voltage in this embodiment is not limited.
Through the above, the control module can interact with the driving module, so that the control module can control the driving module to supply power for the matrix lamp module. When the light-emitting brightness of each lamp needs to be controlled to be consistent, the control module calculates the input current of each lamp by utilizing the target power and the conducting voltage of each lamp, and then controls the driving module to transmit the driving current with corresponding magnitude to each lamp according to the input current, so that the light-emitting brightness of each lamp is consistent, and the light-emitting uniformity of the lamp is improved.
In another embodiment of the present application, the driving module includes a current input pin for providing a current to the driving module;
the function pin is connected with the control module and used for interacting with the control module;
The driving output pin is connected with the input end of the matrix lamp module and used for providing working voltage for the lamp;
and the driving input pin is connected with the output end of the matrix lamp module.
When the driving output pin and the driving input pin are in a conducting state, the current of the lamp forms a loop to be conducted, and the lamp emits light through the current. The current input pin is connected with a power supply and is used for circulating current to the driving module for the driving module to work.
Through the above, the driving module is provided with the driving output pin and the driving input pin, so that the driving module can conveniently control the luminous lamp, and the control flexibility of the lamp is improved.
In another embodiment of the present application, the control module includes a switching pin connected to the driving output pins, for obtaining the operating voltage output by each of the driving output pins.
The control module is provided with a conversion pin connected with the driving output pin, so that the control module can obtain the working voltage in the driving output pin. Specifically, the conversion pin includes an analog-to-digital conversion interface for converting the received analog signal into a digital signal. The driving output pin is used for providing working voltage for the lamp, so that the control module can directly monitor and obtain the working voltage of the lamp in a working state, and the control module can conveniently know the conducting voltage of the lamp according to the working voltage of the lamp.
Through the above, the control module can directly obtain the working voltage when the lamp is in the working state, so that the control module can conveniently obtain the conducting voltage of the lamp, and the control module can conveniently adjust the driving current of each lamp, so that the actual power of each lamp is consistent with the target power.
In another embodiment of the application, the control module is designed to:
based on interaction between the functional pins and the driving module, controlling the driving module to transmit constant driving current to the matrix lamp module;
Controlling the on-off of the driving input pins based on the functional pins to adjust the lamps capable of forming a current loop in the matrix lamp module;
And when the lamp forming the current loop is lightened, the working voltage of the corresponding driving output pin on the driving module is obtained, and the conducting voltage of the corresponding lamp is obtained.
When the lamp is lighted, the value of the working voltage is determined to be the conducting voltage of the corresponding lamp, the lamp is convenient and quick, the conducting voltage is directly obtained by the control module, and the accuracy is improved.
In another embodiment of the present application, the matrix-arranged lamps include n rows and m columns; the number of the driving output pins is not less than m, and each column is connected with one driving output pin; the number of the driving input pins is not less than n, and each row is connected with one driving input pin;
The control module is designed to:
Controlling the driving input pins of the driving module to be sequentially conducted so that the lamps of each row are sequentially turned on, wherein the working voltage flows through the m driving output pins when the lamps of each row are turned on;
And acquiring the working voltage transmitted by each driving output pin based on the conversion pins to obtain the conducting voltage of each lamp.
For ease of understanding, as shown in fig. 2 and 3, in one embodiment, the matrix arrangement of light fixtures includes 12 rows and 4 columns, wherein each light fixture includes three LED lights. The input ends of lamps in the same column are connected with one driving output pin in parallel, and four driving output pins are arranged in total. The output ends of the LED lamps in the same row are respectively connected with the same driving input pin, so that each LED lamp can be independently controlled by the driving module.
The control module controls the driving input pins of the driving module to be sequentially conducted, so that each time one driving input pin is conducted, the working voltage of the four LED lamps is obtained, namely, the conducting voltage.
Through the above, the control module combines the connection mode of the lamps and lanterns arranged in matrix with the driving module through the control of the driving module, so that the control module can obtain the conducting voltage of each lamp, the accuracy of the conducting voltage is improved, and the control accuracy of the actual power of the lamps is improved.
In another embodiment of the application, the control module is designed to:
obtaining input current of each lamp by comparing the target power with the conducting voltage of each lamp;
and controlling the driving module to transmit driving current with corresponding input current to corresponding lamps in the matrix lamp module based on the function pins so as to enable the lamps to work with constant power.
Through the above, after the on-voltage of each lamp is obtained, the input current of each lamp can be calculated, and then the driving module is controlled to transmit the driving current with the corresponding magnitude to the input current to the corresponding lamp, so that the actual power of each lamp is the same, and the luminous uniformity of the lamp is improved.
In another embodiment of the present application, as shown in fig. 3 and 4, the conversion pins include m analog-to-digital converter ports, and are respectively connected to m driving output pins of the driving module;
The control module also comprises a plurality of read-write pins which interact with the function pins of the driving module through an integrated circuit bus;
The function pins include an enable pin, an interrupt pin, and a communication pin.
In another embodiment of the application, the lamp comprises three parallel branches, and each branch is connected with an LED lamp in series; and each lamp is arranged in parallel and is arranged into a matrix.
The embodiment of the application also provides a matrix lamp system, which comprises the matrix lamp circuit, wherein the control module and the driving module are integrated.
For ease of understanding, as shown in fig. 2-4, the GPIO (General-purpose input/output) of the MCU (control module) communicates with the LED driving circuit (driving module) through IIC (led_i2c_scl and led_i2c_sda network), thereby controlling the LED driving circuit to drive each RGB in the color lamp matrix (matrix lamp module) for forming different colors and patterns. The 4 ADC (analog-to-digital converter) ports of the MCU are respectively externally connected with LED_Sb1-LED_Sb4 networks of the LED driving circuit and are used for detecting voltage values on the LED_Sb1-LED_Sb4 networks.
The driving circuit, VDD and VBAT are power supply pins (C4601\C4602\C4615\C4616\C4610\C4603\C4611 are filter capacitors), INTN is interrupt pins (R4601 is an interrupt pull-up resistor), SCL and SDA are IIC communication pins, HWEN are chip enable pins, C1-C6 are driving output pins (anodes of three LEDs inside external RGB), and R1-R12 are driving input pins (cathodes of three LEDs inside external RGB). C1-C6 can respectively output constant current of maximum 20 mA. All LEDs are patterned into a slice by rapidly scanning each LED on.
An RGB matrix circuit, each RGB is formed by packaging three LEDs of red, green and blue, the anode (+) of the LED is connected with the LEDs SW1 to SW4, and the cathode (-) of the LED is connected with the LEDs CS1 to CS12.
And partial pins of the MCU are respectively connected with the LEDs (ADC 1-4) for detecting the voltages of the LEDs (SW 1-4), and GPIO 1-4 are respectively connected with SCL, SDA, INTN, HWEN of the LED driving circuit for controlling the LED driving circuit.
First step (chip enable): the MCU pulls the LED_EN network high, enabling the LED drive circuit.
Second step (RGB voltage self-test): the MCU controls the LED driving chip to output 10mA currents respectively from C1 to C4 through IIC communication, and controls the LED driving chip to conduct R1 and close R2 to R12. At this time, the red (R) lamps in the LEDs 21001, 21005, 21009, and 21013 are turned on (the output currents of C1 to C4 respectively flow into R1 after passing through the red LEDs in the 4 RGB modules, thereby forming a current loop). Then, the MCU detects voltages on the LED_Sb1_Sb4 networks (namely anode voltage of red light, cathode of the LED_Sb1 network is connected with R1 as 0V) through the ADC 1-4, and the voltages of the red (R) lamps in the LED21001, the LED21005, the LED21009 and the LED21013 are respectively 1.8V, 1.9V, 2.0V and 2.1V, so that the ADC 1-4 of the MCU can respectively detect voltage values of 1.8V, 1.9V, 2.0V and 2.1V, and the four voltage values are the conduction voltages of the red LEDs of the LED21001, the LED21005, the LED21009 and the LED21013 at 10 mA.
The same holds true for controlling the LED driving chip to output 10mA current from C1 to C4 respectively, controlling the chip R2 to be conducted and controlling the chips R1, R3 to R12 to be closed. At this time, the green (G) lamps inside the LEDs 21001, 21005, 21009, and 21013 are turned on. Then the MCU detects the voltages of the LEDs_SQ1-SQQQSQ4 (namely the anode voltage of the green light) through the ADC 1-4 respectively, the on-voltage of the green LED inside the module can be obtained.
Similarly, the on-voltages of 3×16=48 LEDs in total can be detected for three LEDs in the module interior R, G, B of the LEDs 21001 to 21016, respectively.
Third step (constant power control): let the on voltage of the red, green and blue LEDs in the RGB module be Vf, and the current passing through the LEDs be I, then the power p=vf×i consumed by the LEDs. Since the on-voltages Vf of 48 LEDs are different (assuming that the product specifications are displayed in the range of 1.5V to 2.4V). When all LED lamps are flowing a constant 10mA current, the power p=vf×i= (1.5V-2.4V) ×0.01a=0.015W-0.024W. The light emission brightness will also differ due to the different power consumed by the LEDs themselves. In the case where all LEDs need to emit as much brightness as possible, constant power control is required. Assuming that the power of all LEDs is controlled to 0.02W, different current values I are required for LEDs of different on-voltages Vf. i=p/vf=0.02/(1.5V-2.4V) =13.33 mA-8.33 mA. Therefore, when the Vf of the red, green and blue LEDs in the RGB module is 1.5V-2.4V, the constant current of 13.33 mA-8.33 mA is correspondingly input, the constant power of 0.02W of all LEDs can be maintained to emit light, and the brightness emitted by the LEDs is similar as much as possible.
Similarly, if it is desired to control all LEDs to change the power consumed, for emitting light of different brightness. Under the condition that the on-voltage drop of all LEDs is known through voltage self-checking, the current values required by each LED under different brightness conditions can be obtained through I=P/Vf, so that all LEDs can be controlled to emit the same brightness
The embodiment of the application also provides a mobile phone comprising the matrix lamp circuit or the matrix lamp system.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (10)
1. The matrix lamp circuit is characterized by comprising a control module, a driving module and a matrix lamp module, wherein the matrix lamp module comprises a plurality of lamps which are arranged in a matrix;
The control module is interacted with the driving module, and the driving module is connected with the matrix lamp module;
The control module is designed to calculate an input current of at least one lamp according to a preset target power and a conduction voltage of the at least one lamp, and the driving module provides different driving currents for each lamp in the matrix lamp module according to the calculated input current of each lamp.
2. The matrix lamp circuit of claim 1 wherein the drive module comprises a current input pin for providing current to the drive module;
the function pin is connected with the control module and used for interacting with the control module;
The driving output pin is connected with the input end of the matrix lamp module and used for providing working voltage for the lamp;
and the driving input pin is connected with the output end of the matrix lamp module.
3. The matrix lamp circuit of claim 2 wherein the control module comprises a switch pin coupled to the drive output pins for deriving the operating voltage output by each of the drive output pins.
4. A matrix lamp circuit according to claim 3, characterized in that the control module is designed to:
based on interaction between the functional pins and the driving module, controlling the driving module to transmit constant driving current to the matrix lamp module;
Controlling the on-off of the driving input pins based on the functional pins to adjust the lamps capable of forming a current loop in the matrix lamp module;
And when the lamp forming the current loop is lightened, the working voltage of the corresponding driving output pin on the driving module is obtained, and the conducting voltage of the corresponding lamp is obtained.
5. The matrix lamp circuit of claim 4 wherein the matrix arrangement of lamps comprises n rows and m columns; the number of the driving output pins is not less than m, and each column is connected with one driving output pin; the number of the driving input pins is not less than n, and each row is connected with one driving input pin;
The control module is designed to:
Controlling the driving input pins of the driving module to be sequentially conducted so that the lamps of each row are sequentially turned on, wherein the working voltage flows through the m driving output pins when the lamps of each row are turned on;
And acquiring the working voltage transmitted by each driving output pin based on the conversion pins to obtain the conducting voltage of each lamp.
6. The matrix lamp circuit of claim 5, wherein the control module is designed to:
obtaining input current of each lamp by comparing the target power with the conducting voltage of each lamp;
and controlling the driving module to transmit driving current with corresponding input current to corresponding lamps in the matrix lamp module based on the function pins so as to enable the lamps to work with constant power.
7. The matrix lamp circuit of claim 5 wherein the conversion pins comprise m analog to digital converter ports respectively connected to m drive output pins of the drive module;
The control module also comprises a plurality of read-write pins which interact with the function pins of the driving module through an integrated circuit bus;
The function pins include an enable pin, an interrupt pin, and a communication pin.
8. The matrix lamp circuit of any one of claims 1-7 wherein the luminaire comprises three parallel branches, each branch having an LED lamp connected in series; and each lamp is arranged in parallel and is arranged into a matrix.
9. A matrix lamp system comprising the matrix lamp circuit of any of claims 1-8, wherein the control module and the drive module are integrally provided.
10. A cell phone comprising the matrix lamp circuit of any one of claims 1-8 or the matrix lamp system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323366758.0U CN221329163U (en) | 2023-12-08 | 2023-12-08 | Matrix lamp circuit, system and mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323366758.0U CN221329163U (en) | 2023-12-08 | 2023-12-08 | Matrix lamp circuit, system and mobile phone |
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| CN221329163U true CN221329163U (en) | 2024-07-12 |
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| CN202323366758.0U Active CN221329163U (en) | 2023-12-08 | 2023-12-08 | Matrix lamp circuit, system and mobile phone |
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